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CN-122014858-A - Sealed stop valve with aligning location

CN122014858ACN 122014858 ACN122014858 ACN 122014858ACN-122014858-A

Abstract

The invention relates to the technical field of stop valves, in particular to a sealed stop valve with aligning and positioning functions. The valve comprises a valve body, wherein a driving device is arranged inside the valve body and comprises a valve rod, the valve rod movably penetrates through the valve body, a valve seat assembly is fixedly arranged inside the valve body, a valve clack assembly is adaptively arranged in an inner cavity of the valve seat assembly, a sealing assembly is sleeved on the outer wall of the valve rod, the top end of the sealing assembly is fixedly connected with the top of the inner wall of the valve body, a guide assembly is fixedly connected with the bottom end of the sealing assembly, and the guide assembly is in sliding fit with the valve clack assembly. Through setting up valve clack subassembly and valve rod to relative independent structure, direction subassembly and valve clack subassembly sliding fit, through the radial guiding effect that relies on disk seat subassembly entry structure, when valve clack subassembly appears radial offset because of valve rod bending, part wearing and tearing, forces the valve clack subassembly to produce relative slip along direction subassembly, automatic compensation centering error makes valve clack subassembly and disk seat subassembly center align.

Inventors

  • HONG CHUNLONG
  • FAN QING
  • LI YONGCHAO
  • WANG YAXIAN
  • ZHANG ZHONGDE

Assignees

  • 天津百利展发集团有限公司

Dates

Publication Date
20260512
Application Date
20260402

Claims (10)

  1. 1. The utility model provides a sealed stop valve with aligning location, includes valve body (1), inside drive arrangement (11) that are equipped with of valve body (1), drive arrangement (11) include valve rod (110), valve rod (110) activity wears to establish inside valve body (1), its characterized in that: a valve seat assembly (12) is fixedly arranged in the valve body (1), and a valve clack assembly (14) is adaptively arranged in an inner cavity of the valve seat assembly (12); The outer wall of the valve rod (110) is sleeved with a sealing component (13), the top end of the sealing component (13) is fixedly connected with the top of the inner wall of the valve body (1), the bottom end of the sealing component (13) is fixedly connected with a guide component (15), and the guide component (15) is in sliding fit with the valve clack component (14); When the valve rod (110) drives the valve clack assembly (14) to be in contact with the valve seat assembly (12) for closing, if the valve clack assembly (14) is radially offset, the inlet structure of the valve seat assembly (12) applies radial guiding force to the valve clack assembly (14) to force the valve clack assembly (14) to slide relative to the guiding assembly (15) until the sealing center of the valve clack assembly (14) is automatically aligned with the sealing center of the valve seat assembly (12).
  2. 2. The valve of claim 1, wherein the valve seat assembly (12) comprises a seat (120) fixed to the inner cavity of the valve body (1), and an annular chamber (121) connected to the seat (120), wherein the inner wall of the annular chamber (121) forms a sealing port for the valve flap assembly (14).
  3. 3. The sealed stop valve with aligning and positioning functions according to claim 2, wherein the two supports (120) are all arranged in an inclined mode, one support (120) is fixedly arranged at an upper position of the inner wall of one end of the valve body (1), one end of the support faces the annular cavity (121) in a downward inclined mode, the other support (120) is fixedly arranged at a lower position of the inner wall of the other end of the valve body (1), one end of the support faces the annular cavity (121) in an upward inclined mode, the annular cavity (121) between the two supports (120) is in a vertical mode, and the valve clack assembly (14) is arranged inside the annular cavity (121).
  4. 4. The sealed stop valve with aligning and positioning according to claim 3, wherein the valve clack assembly (14) comprises a pressing plate (140), a sliding groove is formed in the top of the pressing plate (140), the guiding assembly (15) is slidably connected to the inside of the sliding groove, a hose layer (141) is fixedly connected to the bottom of the pressing plate (140), a hard sealing layer (142) is fixedly connected to the bottom of the hose layer (141), and the outer wall of the hard sealing layer (142) is in sealing fit with the inner wall of the annular cavity (121).
  5. 5. The sealed shut-off valve with aligning and positioning according to claim 4, wherein the hose layer (141) and the hard seal layer (142) are hollow structures, and the hose layer (141) and the hard seal layer (142) are integrally designed in a tapered structure along the axial direction.
  6. 6. The valve according to claim 4, wherein the hose layer (141) is made of fluororubber, the fluororubber is extruded by medium pressure and swells outwards to compensate the sealing gap between the hard sealing layer (142) and the annular cavity (121), and the hard sealing layer (142) is made of stainless steel and is used for bearing radial guiding force applied by the valve seat assembly (12).
  7. 7. The sealed shut-off valve with aligning and positioning according to claim 4, wherein the diameter of the pressing plate (140) is larger than the inner diameter of the annular cavity (121) and is used for limiting the descending limit position of the valve clack assembly (14), when the pressing plate (140) moves to the top of the support (120), the valve clack assembly (14) and the valve seat assembly (12) form a sealing fit state, and the abutting limit of the pressing plate (140) and the support (120) ensures that the hard sealing layer (142) is attached to the sealing surface of the annular cavity (121).
  8. 8. The sealed stop valve with aligning and positioning functions according to claim 4, wherein the guide assembly (15) comprises a sliding rod (150), a sliding plate (151) is fixedly connected to the outer wall of the sliding rod (150), the sliding plate (151) and the sliding rod (150) are both connected to the inside of a sliding groove of the pressing plate (140) in a sliding mode, a ball (152) is movably embedded in the sliding rod (150) at a position close to the bottom, the ball (152) is in rolling fit with the bottom surface of the sliding groove of the pressing plate (140), and the top of the sliding rod (150) is fixedly connected with the seal assembly (13).
  9. 9. The sealed stop valve with aligning and positioning functions according to claim 8, wherein the sealing assembly (13) comprises a flange plate (130), the flange plate (130) is fixedly connected to the position, close to the top, of the inner wall of the valve body (1), a corrugated pipe (131) is fixedly connected to the bottom of the flange plate (130), the corrugated pipe (131) is coaxially sleeved on the outer wall of the valve rod (110), a support plate (132) is arranged between the bottom of the corrugated pipe (131) and the bottom of the valve rod (110), and the support plate (132) is fixedly connected with the top of the sliding rod (150).
  10. 10. The sealed shut-off valve with aligning and positioning according to claim 9, wherein the bellows (131) is made of stainless steel metal and can be deformed in a telescopic manner along with the axial movement of the valve rod (110) so as to realize dynamic sealing and medium isolation during the axial movement of the valve rod (110).

Description

Sealed stop valve with aligning location Technical Field The invention relates to the technical field of stop valves, in particular to a sealed stop valve with aligning and positioning functions. Background The traditional industrial stop valve is used as a common forced sealing valve, and the core sealing function of the conventional industrial stop valve depends on the close fit between a valve clack driven by a valve rod and a fixed valve port. The valve is usually composed of main components such as a valve body, a valve cover, a valve rod, a valve clack and the like, wherein the valve clack is rigidly connected to the tail end of the valve rod in a threaded or similar way, and is driven by the valve rod to perform linear lifting movement in the operation process, so that the valve is opened and closed. When the valve is in operation, the hand wheel or the driving device is rotated clockwise, the valve rod drives the valve clack to move downwards along the axis of the valve clack until the sealing surface of the valve clack is pressed on the sealing surface of the valve seat, and the medium flow is blocked by applying enough specific sealing pressure, otherwise, the valve clack is lifted by anticlockwise rotation, the flow channel is opened, and the reliability of the sealing performance is highly dependent on the machining precision of the sealing surfaces of the valve clack and the valve seat and the initial neutrality during assembly in an ideal state. However, in the actual long-term operation process, the valve rod may be slightly bent or worn due to frequent opening and closing operation, medium pressure fluctuation or external pipeline vibration, the assembly clearance of each connecting part is increased, so that the movement track of the valve clack deviates from the design axis and is not centered with the valve port, and the valve rod and the valve clack with the traditional structure are rigidly connected and do not have an automatic compensation function, after the valve clack is not centered, the valve clack is inconvenient to follow-up to adjust the angle, so that the sealing surface is in unilateral contact or local fit, the sealing specific pressure is seriously uneven, the medium leakage is caused, the local abrasion of the sealing surface is accelerated, and the service life and the sealing performance of the valve are reduced. In view of the above, there is a need for a sealing type stop valve with aligning positioning to solve the above problems. Disclosure of Invention The invention provides a sealed stop valve with aligning and positioning, which is characterized in that a valve clack component independent of a valve rod is arranged, the sliding fit of the valve clack component relative to a sealing component is realized through a guide component, and the valve clack can automatically generate relative sliding under the action of the guiding force of the valve seat inlet to compensate the centering error if radial offset exists in the closing process by combining the cooperation of an inlet structure of a valve seat component, a conical hard sealing layer and a hose layer of the valve clack component, thereby solving the problems in the prior art, namely: When the valve is out of center due to the bending of the valve rod, the abrasion of parts and the like after long-term operation, the valve clack and the valve port are dislocated, the valve clack which is in traditional rigid connection cannot be adjusted in a self-adaptive way, and the problems of medium leakage and accelerated abrasion of the sealing surface are caused. In order to achieve the above purpose, the sealed stop valve with aligning positioning comprises a valve body, wherein a driving device is arranged in the valve body, the driving device comprises a valve rod, the valve rod movably penetrates through the valve body, a valve seat assembly is fixedly arranged in the valve body, and a valve clack assembly is adaptively arranged in an inner cavity of the valve seat assembly; the outer wall of the valve rod is sleeved with a sealing component, the top end of the sealing component is fixedly connected with the top of the inner wall of the valve body, the bottom end of the sealing component is fixedly connected with a guide component, and the guide component is in sliding fit with the valve clack component; when the valve rod drives the valve clack assembly to be in contact with the valve seat assembly for closing, if the valve clack assembly has radial deflection, the inlet structure of the valve seat assembly applies radial guiding force to the valve clack assembly to force the valve clack assembly to slide relative to the guiding assembly until the sealing center of the valve clack assembly is automatically aligned with the sealing center of the valve seat assembly. Among the above-mentioned technical scheme, because set up valve clack subassembly and valve rod into relative independent structure, and not rigid con