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CN-121738365-B - Pressurizing water stop screw and pouring template

CN121738365BCN 121738365 BCN121738365 BCN 121738365BCN-121738365-B

Abstract

The invention discloses a pressurizing water stop screw rod, which relates to the technical field of water stop screw rods and comprises two tensioning screw rods, a water stop part, two traction pieces and a limiting unlocking assembly, wherein an elastic sealing part is fixedly sleeved on the periphery of the water stop part, the water stop part comprises two eccentric pieces which are eccentrically arranged, an expansion cavity is formed between the outer sides of the eccentric pieces and the inner sides of the elastic sealing part, the traction pieces are respectively arranged on two sides of the water stop part, each traction piece comprises a connecting section, a sliding rod and a sealing plate, the sealing plate is arranged in the eccentric pieces and is in sealing sliding connection, the sealing plate moves in the eccentric pieces to expand the elastic sealing part, and the limiting unlocking assembly enables the elastic sealing part to keep an expanded state. The invention also discloses a pouring template, which comprises a supporting die, wherein the supporting die is provided with a pull rod, and the pull plate of the pressurizing water stop screw rod is clamped on the pull rod. By arranging the components, the path of moisture permeation is effectively prolonged, and the effect of multistage sealing is realized.

Inventors

  • MIAO QIUFU
  • Duan Fuhao
  • YANG LONGBAO
  • ZONG JINGYUN
  • ZHANG JINGXIAO
  • Kou Wenbin
  • LI XIN
  • LI MEI
  • WANG YI
  • Qiao Runbin
  • LIU KAI

Assignees

  • 山西路桥建设集团有限公司
  • 山西昔榆高速公路有限公司
  • 山西路桥第六工程有限公司
  • 长安大学

Dates

Publication Date
20260505
Application Date
20260228

Claims (10)

  1. 1. The pressurizing water-stopping screw rod comprises two tensioning screw rods (1), wherein a pull plate (2) is sleeved on the tensioning screw rods (1), and the pressurizing water-stopping screw rod is characterized by further comprising a water-stopping part (3), an elastic sealing part (8) is fixedly sleeved on the periphery of the water-stopping part (3), the water-stopping part (3) comprises two eccentric parts (301) which are eccentrically arranged, an end cover (302) is fixedly arranged at one end, close to the pull plate (2), of each eccentric part (301), a communication hole (306) and a plug hole (303) are formed at one end, far away from the pull plate (2), of each eccentric part (301), and an expansion cavity (304) is formed between the outer side of each eccentric part (301) and the inner side of the elastic sealing part (8); The two traction pieces (4) are respectively arranged at two sides of the water stopping part (3), the traction pieces (4) comprise a connecting section (401), a sliding rod (402) and a sealing plate (403), the sealing plate (403) is arranged in the eccentric piece (301) and is in sealing sliding connection with the eccentric piece (301), and when the sealing plate (403) moves in the eccentric piece (301), air in the eccentric piece (301) can be extruded and enters the expansion cavity (304) through the communication hole (306), so that the elastic sealing part (8) is expanded; and the limiting unlocking component (5) is arranged on the end face, far away from the connecting section (401), of the sealing plate (403), and the limiting unlocking component (5) can be inserted into and limited on the inserting hole (303) so that the elastic sealing part (8) is kept in an expanded state.
  2. 2. A pressurized water stop screw according to claim 1, characterized in that said limit unlocking assembly (5) comprises: a plug rod (501) one end of which is fixedly mounted on the end surface of the sealing plate (403) far away from the connecting section (401); the elastic frustum (502) is fixedly sleeved on the periphery of the inserting connection rod (501), and can be in limit insertion connection with the inserting hole (303) so that the sealing plate (403) is fixed relative to the eccentric part (301).
  3. 3. A pressurizing water stop screw according to claim 2, characterized in that the diameter of the end of the elastic frustum (502) close to the sealing plate (403) is larger than the diameter of the insertion hole (303), and the elastic frustum (502) can pass through the insertion hole (303) and is limited at the outer end of the insertion hole (303).
  4. 4. A pressurized water stop screw according to claim 1, wherein the water stop portion (3) further comprises: and a seal groove (305) which is formed on the outer periphery of the end cap (302), wherein the end of the elastic seal portion (8) is disposed in the seal groove (305).
  5. 5. A pressurizing water stop screw according to claim 2, further comprising a guide sleeve (6) slidably fitted over the outer side of the corresponding traction member (4) and having one end fixedly connected to the corresponding end cap (302) and the other end opened in a horn shape.
  6. 6. The pressurizing water stop screw rod according to claim 5, wherein the connecting section (401) is in threaded connection with the tensioning screw rod (1), the connecting section (401) is arranged on one side of the guide sleeve (6) close to the pouring template, two ends of the sliding rod (402) are fixedly connected with the connecting section (401) and the sealing plate (403) respectively, and the sliding rod (402) is arranged on the inner side of the guide sleeve (6) in a sliding mode.
  7. 7. A pressurizing water stop screw according to claim 3, characterized in that the end of the sealing plate (403) remote from the sliding rod (402) forms a pressurizing cavity (7) with the eccentric member (301), the pressurizing cavity (7) being in communication with the expansion cavity (304) via the communication hole (306).
  8. 8. A pressurized water stop screw according to claim 1, further comprising a compression member (9) fitted around the side wall of the eccentric member (301) for pushing the elastic sealing portion (8) to expand after release.
  9. 9. The pressurizing water stop screw rod according to claim 8, further comprising a locking member (10) having one end locked to the outside of the compression member (9) and the other end inserted into the insertion hole (303) for holding the compression member (9) in a compressed state.
  10. 10. Pouring formwork, which adopts the pressurizing water stop screw rod according to any one of claims 1-9, characterized in that the pouring formwork comprises a formwork (11), a pull rod (111) is arranged on the formwork (11), and a pull plate (2) of the pressurizing water stop screw rod is clamped on the pull rod (111).

Description

Pressurizing water stop screw and pouring template Technical Field The invention relates to the technical field of water stop screws, in particular to a pressurizing water stop screw and a pouring template. Background In road and road bridge engineering construction, cast-in-place concrete structures are widely used in bridge piers, capping beams, box girders, retaining walls, crash barriers, underground passages, and various culverts and drainage structures. The structures not only need to bear huge static load and dynamic load, but also are exposed to severe environments such as rainwater, snow melting agent, freeze thawing cycle and the like for a long time, and the requirements on durability and waterproof and impervious performances are far higher than those of common building structures. The concrete structure is ensured to be integral and compact, and the invasion of moisture and aggressive media is prevented, so that the concrete structure is a key for guaranteeing the design service life and the structural safety. After water, chloride ions and the like invade, corrosion of internal steel bars and concrete expansion are directly caused, and in northern areas, freezing and thawing damage can accelerate the process, so that structural safety is seriously threatened. The method is particularly prominent in the bridge pier column water level change area, the side wall of the underground passage, the box girder web plate and other parts. The traditional water stop screw relies on a single-layer water stop sheet or a water-swelling rubber ring to realize sealing, wherein gaps are easy to generate at the welding positions of the metal water stop sheet and the screw, the rubber water stop ring has the problems of not tightly matched with the screw and ageing shrinkage after long-term use, so that moisture can still permeate along the gaps, the traditional water stop sheet adopts a concentric annular structure, the permeation path of the moisture along the axial direction of the screw is shorter, the water-swelling water stop structure has the risk of early activation, a wet environment during concrete pouring is easy to cause expansion of expansion parts in advance, the screw is prevented from being dismantled, sealing failure is caused by insufficient expansion pressure, the end after the screw is cut is improperly treated, corrosion is easily caused, a new leakage channel is finally formed, and the procedures are complicated and are compensated by the procedures of additionally brushing antirust paint, blocking polymer cement mortar and the like. Therefore, the technical problems of poor sealing effect, insufficient durability and low construction reliability of the traditional water-stopping screw are solved by optimizing the design of a permeation path and constructing a hierarchical sealing system. Disclosure of Invention The invention provides a pressurizing water stop screw, which comprises two tensioning screws, a pulling plate sleeved on the tensioning screws, a water stop part, a limiting unlocking assembly and a limiting unlocking assembly, wherein the water stop part is fixedly sleeved on the periphery of the water stop part and comprises two eccentric parts which are eccentrically arranged, one end of each eccentric part, which is close to the pulling plate, is fixedly provided with an end cover, one end of each eccentric part, which is far away from the pulling plate, is provided with a communication hole and a plug hole, an expansion cavity is formed between the outer side of each eccentric part and the inner side of each elastic sealing part, the two traction parts are respectively arranged on two sides of the water stop part, each traction part comprises a connecting section, a sliding rod and a sealing plate, the sealing plate is arranged in each eccentric part and is in sealing sliding connection with the eccentric parts, when the sealing plate moves in the eccentric parts, air in the eccentric parts can be extruded into the expansion cavity through the communication holes to expand the elastic sealing parts, and the limiting unlocking assembly is arranged on the end face of the sealing plate, which is far away from the connecting section, and the limiting unlocking assembly can be inserted into and limited at the plug hole to enable the elastic sealing parts to keep an expansion state. Preferably, the limiting unlocking assembly comprises a plugging rod, an elastic frustum and an elastic taper table, wherein one end of the plugging rod is fixedly arranged on the end face, far away from the connecting section, of the sealing plate, the elastic taper table is fixedly sleeved on the periphery of the plugging rod and can be in limiting plugging with the plugging hole, and the sealing plate is fixed relative to the eccentric part. Preferably, the diameter of the end, close to the sealing plate, of the elastic frustum is larger than that of the inserting hole, and the elastic frustum can pene