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CN-122014142-A - Orifice compression sealing device, freezing pipe drilling device and use method

CN122014142ACN 122014142 ACN122014142 ACN 122014142ACN-122014142-A

Abstract

The invention provides an orifice compression sealing device, a freezing pipe drilling device and a use method, wherein the orifice compression sealing device comprises a decompression mechanism, a first compression mechanism and a second compression mechanism, the decompression mechanism comprises a pipe body and a decompression part which are connected, a first inner cavity is arranged in the pipe body, the decompression part comprises a second inner cavity and a rotary outer cavity, the rotary outer cavity is positioned at the outer side of the second inner cavity, one end of the second inner cavity is communicated with the first inner cavity, the other end of the second inner cavity is communicated with the rotary outer cavity, a water outlet is arranged at the position, close to the pipe body, of the rotary outer cavity, the first compression mechanism is sleeved on the outer walls of the pipe body and the water outlet and used for compressing the water outlet, and the second compression mechanism is arranged at the end, far away from the pipe body, of the decompression part and is sleeved on the freezing pipe and used for compressing the joint of the freezing pipe and the decompression mechanism. The orifice compression sealing device is simple in structure, convenient to operate and capable of improving sealing effectiveness and decompression effect.

Inventors

  • ZHAO WENQIANG
  • HAN JIAN
  • DONG XINWEI
  • LU ZHENG
  • YANG ZISONG
  • WANG BAOSHENG
  • CHEN YUWEN
  • LU KAIZHONG
  • LI CHANGTAO

Assignees

  • 上海市基础工程集团有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (10)

  1. 1. An orifice compression sealing device for compressing and sealing an orifice of a bore of a freezing pipe (5), characterized by comprising: The decompression mechanism (1), decompression mechanism (1) is including body (11) and decompression portion (12) that link to each other, be provided with in body (11) and supply the first inner chamber (111) that freezes pipe (5) and pass, decompression portion (12) are including being used for supplying the second inner chamber (121) that freezes pipe (5) and being used for the water conservancy diversion decompression to revolve outer chamber (122), it is located the outside of second inner chamber (121) to revolve outer chamber (122), the one end and the first inner chamber (111) intercommunication of second inner chamber (121), the other end of second inner chamber (121) with revolve outer chamber (122) intercommunication, it is provided with delivery port (123) to revolve outer chamber (122) near body (11) department, the one end that decompression portion (12) keep away from body (11) is provided with through-hole (124) that supply freezes pipe (5) to pass; The first pressing mechanism (13) is sleeved on the outer walls of the pipe body (11) and the water outlet (123) and used for pressing the water outlet (123); The second compressing mechanism (14), the second compressing mechanism (14) is arranged at one end of the decompression part (12) far away from the pipe body (11) and is used for being sleeved on the freezing pipe (5) so as to compress the joint of the freezing pipe (5) and the decompression mechanism (1).
  2. 2. The orifice compression seal of claim 1, wherein said convoluted outer chamber (122) is provided in two, said two convoluted outer chambers (122) being located on either side of the direction of water flow in said second interior chamber (121), and/or, The rotary outer cavity (122) comprises a plurality of cavity units (100) which are arranged along the water flow direction, and the two adjacent cavity units (100) are communicated, so that the rotary outer cavity (122) forms a rotary channel and/or, The water outlet (123) is a bevel which is inclined outwards, and/or, The outer wall of the water outlet (123) is annular, a fifth flange (101) is wound on the outer wall of the water outlet (123), and/or, The rotary outer cavity (122) is provided with a water inlet (125), the water inlet (125) is close to the through hole (124) and is communicated with the second inner cavity (121), and/or, The outer wall of one end of the pipe body (11) far away from the pressure reducing part (12) is wound with Six Codes th flange (112) and/or, The first pressing mechanism (13), the pressure reducing mechanism (1) and the second pressing mechanism (14) are positioned on the same axis.
  3. 3. The orifice compression seal as claimed in claim 2, wherein said cavity unit (100) is a drop-shaped cavity or a wave-shaped cavity, the tip of said cavity unit (100) being directed towards the water inlet (125), the rounded end of said cavity unit (100) being directed towards the water outlet (123), and/or, A shunt (102) is arranged in each cavity unit (100).
  4. 4. An orifice compression seal as claimed in claim 3, wherein said flow splitter (102) is of a drop-shaped or wavy configuration, the tip of the drop-shaped configuration being directed towards the water inlet (125), and/or, The shunt (102) is arranged coaxially with the cavity unit (100).
  5. 5. The orifice compression seal apparatus of claim 1, wherein said first compression mechanism (13) comprises a first compression sleeve assembly (131), a first packing box assembly (132) and a plurality of first connectors (133), the first compression sleeve assembly (131) is sleeved on the outer wall of said tube (11), said first packing box assembly (132) is sleeved on the outer wall of said tube (11) and the outer wall of said water outlet (123), one end of said first packing box assembly (132) is compressed on the outer wall of one end of the first compression sleeve assembly (131), said first compression sleeve assembly (131) and first packing box assembly (132) are connected by a plurality of first connectors (133), and/or, The second compressing mechanism (14) comprises a second compressing sleeve assembly (141), a second packing box assembly (142) and a plurality of second connecting pieces (143), the second packing box assembly (142) and the second compressing sleeve assembly (141) are used for being sleeved on a freezing pipe (5) positioned outside a decompression part (12), one end of the second packing box assembly (142) is connected with one end, far away from a pipe body (11), of the decompression part (12), the other end of the second packing box assembly (142) is compressed on the outer wall of one end of the second compressing sleeve assembly (141), and the second packing box assembly (142) is connected with the second compressing sleeve through the plurality of second connecting pieces (143).
  6. 6. The orifice compression seal apparatus of claim 5, wherein said first compression sleeve assembly (131) comprises a first sleeve (001) and a first flange (002), said first sleeve (001) being disposed over an outer wall of said tubular body (11), said first flange (002) being disposed around an outer wall of said first sleeve (001), and/or, The first packing box component (132) comprises a second sleeve (003), a second flange (004) and a first packing (005), the second sleeve (003) is sleeved on the outer wall of the pipe body (11) and the outer wall of the water outlet (123), the first packing (005) is detachably arranged between the second sleeve (003) and the outer wall of the pipe body (11), the second flange (004) is wound on the outer wall of the second sleeve (003), and/or, The second compression sleeve assembly (141) comprises a third sleeve (006) and a third flange (007), the third sleeve (006) is used for being sleeved on the freezing pipe (5), the third flange (007) is wound on the outer wall of the third sleeve (006), and/or, The second packing box assembly (142) comprises a fourth sleeve (008), a fourth flange (009) and a second packing (010), the fourth sleeve (008) is used for being sleeved on the freezing pipe (5), the second packing (010) is detachably arranged between the fourth sleeve (008) and the freezing pipe (5), and the fourth flange (009) is wound on the outer wall of the fourth sleeve (008).
  7. 7. The orifice compression seal of claim 6, wherein said fourth sleeve (008) and relief portion (12) are welded at an end proximate to the through bore (124).
  8. 8. A freeze pipe drilling apparatus, comprising: The orifice pipe (2) is used for being fixed in an opening of the lining (4), and a drain pipe (21) is obliquely arranged on the side wall of the orifice pipe (2); The inlet end of the first valve (3) is connected with the connecting end of the orifice pipe (2) and is used for opening and closing a channel of the orifice pipe (2); the orifice compression seal of any one of claims 1-7, wherein the end of the tube (11) of the orifice compression seal remote from the pressure relief portion (12) is connected to the outlet end of the first valve (3) for the passage of the freezing tube (5) and for diversion and pressure relief.
  9. 9. Frozen pipe drilling device according to claim 8, characterized in that the end of the drain pipe (21) remote from the orifice pipe (2) is provided with a second valve (22), the second valve (22) being used for opening and closing the drain pipe (21) and/or, The lining (4) is a lining (4) segment and/or; the first valve (3) is a ball valve.
  10. 10. A method of using a freeze pipe drilling apparatus according to claim 8 or 9, comprising the steps of: s1, fixing an orifice pipe (2) in an opening of a lining (4), and installing an inlet end of a first valve (3) at a connecting end of the orifice pipe (2); s2, when the first valve (3) is in a closed state, installing an orifice pressing sealing device at the outlet end of the first valve (3); S3, opening a first valve (3), enabling a freezing pipe (5) to sequentially pass through a second pressing mechanism (14), a pressure reducing mechanism (1), the first valve (3) and an orifice pipe (2) of the orifice pressing sealing device, and drilling; S4, in the drilling process of the freezing pipe (5), if water gushes with the pressure lower than a first preset pressure are met, a second pressing mechanism (14) and a first pressing mechanism (13) of the orifice pressing sealing device are operated to press and seal the freezing pipe (5); If water gushes with the pressure higher than the second preset pressure, the first pressing mechanism (13) is loosened, the drain pipe (21) is opened, the drain pipe (21) on the orifice pipe (2) and the water outlet (123) of the pressure reducing part (12) are used for releasing pressure on the water gushing, after the pressure release, the second pressing mechanism (14) is operated to press and seal the freezing pipe (5), and then the drain pipe (21) and the first pressing mechanism (13) are closed to seal the water gushing.

Description

Orifice compression sealing device, freezing pipe drilling device and use method Technical Field The invention belongs to the technical field of tunnel freezing pipe drilling, and particularly relates to an orifice compression sealing device, a freezing pipe drilling device and a using method. Background The artificial stratum freezing method is a main construction method for constructing a subway tunnel connecting channel in a water-rich stratum. According to the method, horizontal holes or inclined holes are formed in tunnel lining according to the structural form of a communication channel, an orifice pipe and an orifice compacting and sealing device are installed, and then freezing pipe drilling operation is carried out. When the stratum where the connecting channel is located is a sandy soil layer or a confined aquifer, water and mud (sand) are easy to flow from the orifice in the drilling process of the freezing pipe, and engineering risks such as subsidence of the ground, subsidence of the existing building (structure) or breakage of tunnel segments can be possibly caused, so that the construction safety and the progress are seriously influenced. In the prior art, the blowout prevention technical scheme for the drilling of the freezing pipe is mainly characterized in that packing is arranged on the periphery of the freezing pipe and used for blocking water and mud (sand) from rushing out along the pipe wall in a compacting mode. For example, chinese patent with publication number "CN214424462U" discloses a blowout prevention device for drilling a horizontal freezing hole of a foundation pit, which has a simple structure and convenient operation, but lacks a decompression function, and is difficult to cope with a high-pressure water-gushing condition. The Chinese patent with publication number of CN107664018B discloses an automatic control blowout preventer for horizontal and inclined drilling and mounting and using methods, and the Chinese patent with publication number of CN112796699A discloses a high-pressure blowout preventer with an emergency plugging cabin and mounting and using methods, and both the two technical schemes need to use external hanging equipment, and the blowout preventer has better blowout preventing effect, but the system is complex and the operation requirement is higher. Disclosure of Invention The invention provides an orifice compression sealing device, a freezing pipe drilling device and a using method, which not only have a simplified structure and convenient operation, but also improve the sealing effectiveness and the decompression effect. The technical scheme of the invention is as follows: an orifice compression seal apparatus for compressing and sealing an orifice of a freeze pipe bore, comprising: The decompression mechanism comprises a pipe body and a decompression part which are connected, a first inner cavity for a freezing pipe to pass through is arranged in the pipe body, the decompression part comprises a second inner cavity for the freezing pipe to pass through and a rotary outer cavity for guiding and decompressing, the rotary outer cavity is positioned at the outer side of the second inner cavity, one end of the second inner cavity is communicated with the first inner cavity, the other end of the second inner cavity is communicated with the rotary outer cavity, a water outlet is formed in the position, close to the pipe body, of the rotary outer cavity, and a through hole for the freezing pipe to pass through is formed in one end, far away from the pipe body, of the decompression part; the first pressing mechanism is sleeved on the outer walls of the pipe body and the water outlet and used for pressing the water outlet; the second compressing mechanism is arranged at one end of the pressure reducing part, far away from the pipe body, and is used for being sleeved on the freezing pipe so as to compress the joint of the freezing pipe and the pressure reducing mechanism. Further, in the orifice pressing sealing device, two rotary outer cavities are arranged, the two rotary outer cavities are respectively positioned at two sides of the water flow direction of the second inner cavity, and/or, The rotary outer cavity comprises a plurality of cavity units which are arranged along the water flow direction, and the two adjacent cavity units are communicated, so that the rotary outer cavity forms a rotary channel and/or, The water outlet is an inclined opening which is inclined outwards, and/or, The outer wall of the water outlet is annular, a fifth flange is wound on the outer wall of the water outlet, and/or, The rotary outer cavity is provided with a water inlet which is close to the through hole and is communicated with the second inner cavity, and/or, The outer wall of one end of the pipe body far away from the decompression part is wound with Six Codes th flange and/or, The first pressing mechanism, the pressure reducing mechanism and the second pressing mechani