Soft sealing low-temperature gate valve

Abstract

The utility model belongs to the technical field of valves, and discloses a soft sealing low-temperature gate valve. The soft sealing low-temperature gate valve comprises a connecting frame and two communicating pipes, the communicating pipes are fixedly connected to the two sides of the connecting frame, a cavity is formed in the connecting frame and communicated with the communicating pipes, a gate plate is arranged in the cavity, a first flange plate is fixedly connected to the top of the connecting frame, and a second flange plate is fixedly connected to the first flange plate through bolts. The top of the second flange plate is fixedly connected with a fixed cylinder, the fixed cylinder is internally in threaded connection with a threaded rod, and the top of the threaded rod is fixedly connected with a turntable. According to the soft sealing low-temperature gate valve, the connecting rod rotates to drive the special-shaped block to rotate, so that the special-shaped block abuts against the sealing plates on the two sides to move outwards, the sealing plates can be tightly attached to the pipe wall of the communicating pipe for sealing, the soft sealing low-temperature gate valve can adapt to media of different temperatures for compensation sealing, and the sealing effect is prevented from being affected by shrinkage or expansion of materials; the problems proposed in the background technology are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve, concretely is a kind of soft sealing cryogenic gate valve. BACKGROUND

[0002] Cryogenic gate valve is a kind of valve specially used in low temperature environment, usually used to control the flow of low temperature medium, the key is to select suitable low-temperature-resistant material and sealing design, to ensure stable work under extremely low temperature conditions, widely used in petrochemical industry, aerospace, natural gas and other fields.

[0003] The existing cryogenic gate valve is sealed by moving the valve plate inside, and the outer side of the valve plate is usually provided with a sealing ring and is in contact with the valve seat to seal, since the medium temperature in the cryogenic gate valve is low, the material is seriously affected after long time use, and deformation occurs to affect the sealing effect, and the temperature change of the medium is adapted to compensate the sealing, therefore we design a kind of soft sealing cryogenic gate valve. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of soft sealing cryogenic gate valve, the soft sealing cryogenic gate valve can be sealed to different temperature medium, simultaneously, the position of sealing plate can be changed to compensate sealing, to be stronger in adaptability in turn, solve the problem proposed in background art.

[0005] To achieve the above object, the utility model is realized by the following technical scheme: a kind of soft sealing cryogenic gate valve including connecting frame and two communicating pipes, the two sides of the connecting frame are fixedly connected with communicating pipe, the cavity is set in the connecting frame and is communicated with communicating pipe, the cavity is provided with gate, the top of the connecting frame is fixedly connected with first flange plate, the first flange plate is fixedly connected with second flange plate by bolt, the top of the second flange plate is fixedly connected with fixed cylinder, the fixed cylinder is threadedly connected with threaded rod, the top of the threaded rod is fixedly connected with rotary disc, the bottom end of the threaded rod extends to the cavity and is movably connected with gate by plane bearing;

[0006] The threaded rod is provided with connecting rod, the gate is provided with perforation, the perforation is provided with special-shaped block, the bottom end of the connecting rod extends to the perforation and is fixedly connected with special-shaped block, the left and right sides of the gate are provided with placing groove, the placing groove is provided with sealing plate, the inner wall of the placing groove is provided with strip groove, the strip groove is inserted with slide rod, and the slide rod is fixedly connected with sealing plate, the outer side of the slide rod is sleeved with reset spring, the two ends of the reset spring are fixedly connected with sealing plate and the inner bottom wall of strip groove respectively, the top end of the connecting rod is provided with limit handle.

[0007] Through the technical scheme, the rotating threaded rod drives the gate plate to move up and down until the gate plate moves to the bottom of the cavity, and the special-shaped block is limited by the two sealing plates and does not rotate with the threaded rod, that is, the connecting rod remains relatively static, at this time, the connecting rod is rotated to drive the special-shaped block to rotate, the rotation of the special-shaped block extrudes the sealing plates to the two sides to make the sealing plates slide in the placing grooves and tightly seal the communicating pipes, at this time, the gate plate closing step is completed and the sealing effect is ensured, if the gate plate is opened, the connecting rod is reversed to reset the special-shaped block, at this time, the sealing plates are reset in the placing grooves by the resetting springs, and the threaded rod is rotated to drive the gate plate to move upwards to normally pass water.

[0008] Preferably, the sealing plate is fixedly connected with the sealing plate on the side close to the corresponding communicating pipe.

[0009] Through the technical scheme, the sealing plate is sealed by the sealing plate when tightly abutting against the communicating pipe, and the abutting degree between the sealing plate and the communicating pipe can be adjusted, so that the sealing is compensated, and the sealing of media with different temperatures is adapted.

[0010] Preferably, the top end of the connecting rod is externally sleeved with a limiting handle, the lower surface of the limiting handle is fixedly connected with a limiting rod, and the upper surface of the rotating disc is provided with a limiting groove at a position corresponding to the limiting rod.

[0011] Through the technical scheme, when the threaded rod rotates, the special-shaped block is limited by the sealing plate to prevent the connecting rod from rotating, that is, the threaded rod rotates alone to drive the gate plate to move up and down, then the limiting handle is rotated alone to drive the connecting rod and the special-shaped block to rotate, so that the sealing step is completed, and then the limiting handle is slid downwards to make the limiting rod slide into the limiting groove to complete the limiting of the special-shaped block.

[0012] Preferably, the special-shaped block is in contact with the sealing plate, and the shape of the gate plate is adapted to the shape of the cavity.

[0013] Preferably, the number of the strip-shaped grooves is several and the strip-shaped grooves are uniformly distributed on the gate plate, and the shape of the placing groove is consistent with the shape of the sealing plate.

[0014] Preferably, the length of the cavity is greater than the diameter of the gate plate, and the shape of the special-shaped block is adapted to the shape of the perforation.

[0015] Through the technical scheme, the gate plate moves up and down in the cavity to complete the sealing and water passing, and in the initial state, the special-shaped block is located in the perforation, and when the special-shaped block rotates, the special-shaped block extends to the outside of the perforation to limit.

[0016] Through the foregoing technical scheme, the utility model has the advantages of:

[0017] 1. The soft sealing low temperature gate valve, through the rotation of the connecting rod to drive the special-shaped block to rotate, the special-shaped block is pressed against the sealing plates on both sides to move outward, the sealing plates are tightly sealed against the pipe wall of the communicating pipe, different temperature media can be compensated and sealed, the influence of material shrinkage or expansion on the sealing effect is prevented, and the problems in the background art are solved.

[0018] 2. The soft sealing low temperature gate valve, through the cooperation of the limiting handle, the limiting rod and the limiting groove, the connecting rod can remain stationary when the threaded rod rotates, so that the connecting rod and the special-shaped block are prevented from rotating when the gate plate moves up and down, after the position of the special-shaped block is changed for sealing after the connecting rod is rotated, the limiting rod is inserted into the limiting groove to limit the limiting handle, and then the connecting rod and the special-shaped block are limited, so that the sealing effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the utility model;

[0020] Figure 2 It is a top view of the utility model;

[0021] Figure 3 It is a perspective view of the utility model Figure 2 A-A cross-sectional view of the utility model;

[0022] Figure 4 It is a perspective view of the utility model Figure 3 B enlarged view of the utility model;

[0023] Figure 5 It is a perspective view of the utility model Figure 3 C enlarged view of the utility model;

[0024] Figure 6 It is a gate plate schematic view of the utility model.

[0025] In the figure: 1, connecting frame; 2, communicating pipe; 3, cavity; 4, gate plate; 5, first flange plate; 6, second flange plate; 7, fixed cylinder; 8, threaded rod; 9, rotating disc; 10, connecting rod; 11, perforation; 12, special-shaped block; 13, placing groove; 14, sealing plate; 15, sealing gasket; 16, strip-shaped groove; 17, sliding rod; 18, return spring; 19, limiting handle; 20, limiting rod; 21, limiting groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Please refer to Figures 1-6 The utility model provides a technical scheme: a kind of soft sealing cryogenic gate valve, including connecting frame 1 and two communicating pipes 2, both sides of connecting frame 1 are fixedly connected with communicating pipe 2, cavity 3 is set in connecting frame 1 and is communicated with communicating pipe 2, gate 4 is arranged in cavity 3, the top of connecting frame 1 is fixedly connected with first flange plate 5, and second flange plate 6 is fixedly connected on first flange plate 5 by bolt, the top of second flange plate 6 is fixedly connected with fixed cylinder 7, and threaded rod 8 is threadedly connected in fixed cylinder 7, and the top of threaded rod 8 is fixedly connected with rotating disc 9, and the bottom end of threaded rod 8 extends to cavity 3 and is movably connected with gate 4 by plane bearing;

[0028] Threaded rod 8 is provided with connecting rod 10, and perforation 11 is set in gate 4, profiled block 12 is arranged in perforation 11, the bottom end of connecting rod 10 extends to perforation 11 and is fixedly connected with profiled block 12, and placing groove 13 is set in the left and right sides of gate 4, sealing plate 14 is arranged in placing groove 13, strip-shaped groove 16 is set in the inner wall of placing groove 13, sliding rod 17 is inserted in strip-shaped groove 16, and sliding rod 17 is fixedly connected with sealing plate 14, reset spring 18 is sleeved on the outside of sliding rod 17, and the two ends of reset spring 18 are fixedly connected with sealing plate 14 and the inner bottom wall of strip-shaped groove 16 respectively, and the top end of connecting rod 10 is provided with limit knob 19.

[0029] In the embodiment, the threaded rod 8 is designed to drive the gate 4 to move up and down until the gate 4 moves to the bottom of the cavity 3, and the profiled block 12 is limited by the two sealing plates 14 and does not rotate with the threaded rod 8 during rotation, that is, the connecting rod 10 remains relatively stationary. At this time, the connecting rod 10 is rotated to drive the profiled block 12 to rotate, and the rotation of the profiled block 12 will extrude the sealing plates 14 on both sides to make them slide in the placing grooves 13 and tightly seal the communicating pipes 2. At this time, the gate 4 closing step is completed and the sealing effect is ensured. If the gate 4 is opened, the profiled block 12 is reset by reversing the connecting rod 10. At this time, the sealing plate 14 is reset to the placing groove 13 by the effect of the reset spring 18. At this time, the threaded rod 8 is rotated to drive the gate 4 to move upwards to normally pass water.

[0030] Please refer to Figure 3 、 4 The shape of the sealing plate 14 is consistent with the shape of the communicating pipe 2, and the side of the sealing plate 14 close to the corresponding communicating pipe 2 is fixedly connected with the sealing plate 14.

[0031] In the embodiment, the sealing plate 14 is sealed by the sealing plate 14 when it is tightly attached to the communicating pipe 2, and the tightness between the sealing plate 14 and the communicating pipe 2 can be adjusted to adapt to different temperature media for compensation sealing.

[0032] Please refer to Figure 3 , 5 , the top end of the connecting rod 10 is sleeved with a limiting handle 19 outside, the lower surface of the limiting handle 19 is fixedly connected with a limiting rod 20, and the upper surface of the rotating disc 9 is provided with a limiting groove 21 at the position corresponding to the limiting rod 20.

[0033] In the embodiment, when the threaded rod 8 rotates, the special-shaped block 12 is limited by the sealing plate 14 so that the connecting rod 10 does not rotate, that is, the threaded rod 8 rotates alone to drive the gate plate 4 to move up and down, then the limiting handle 19 is rotated alone to drive the connecting rod 10 and the special-shaped block 12 to rotate, so that the sealing step is completed, then the limiting handle 19 is slid downward to make the limiting rod 20 slide into the limiting groove 21 to complete the limiting, and the special-shaped block 12 is limited.

[0034] Please refer to Figure 3 , 4 , the special-shaped block 12 is in contact with the sealing plate 14, and the shape of the gate plate 4 is matched with the shape of the cavity 3.

[0035] Please refer to Figure 6 , the number of the strip-shaped grooves 16 is several and they are uniformly distributed on the gate plate 4, and the shape of the placing groove 13 is consistent with the shape of the sealing plate 14.

[0036] Please refer to Figure 3 , 4 , the length of the cavity 3 is greater than the diameter of the gate plate 4, and the shape of the special-shaped block 12 is matched with the shape of the perforation 11.

[0037] In the embodiment, the gate plate 4 moves up and down in the cavity 3 to complete the sealing and water passing steps, and in the initial state, the special-shaped block 12 is located in the perforation 11, and when the special-shaped block 12 rotates, it extends to the outside of the perforation 11 to be limited.

[0038] When the soft sealing low-temperature gate valve works, the threaded rod 8 is rotated to drive the gate plate 4 to move up and down until the gate plate 4 moves to the bottom of the cavity 3, at this time, the limiting rod 20 is separated from the limiting groove 21, and in the rotating process, the special-shaped block 12 is limited by the two sealing plates 14 and does not rotate with the threaded rod 8, that is, the connecting rod 10 remains relatively static, at this time, the connecting rod 10 is rotated to drive the special-shaped block 12 to rotate, the rotation of the special-shaped block 12 extrudes the sealing plates 14 to the two sides to make them slide in the placing grooves 13 and tightly seal the communicating pipe 2, then the limiting handle 19 is slid to make the limiting rod 20 slide into the limiting groove 21 to complete the sealing of the closed gate, if the gate plate 4 needs to be opened, only the limiting rod 20 is separated from the limiting groove 21, then the connecting rod 10 is reversely rotated to reset the special-shaped block 12, at this time, the sealing plate 14 is reset to the placing groove 13 by the effect of the reset spring 18, at this time, the threaded rod 8 is rotated to drive the gate plate 4 to move upward to normally pass water.

[0039] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0040] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A soft-seal cryogenic gate valve, comprising a connecting frame (1) and two communication pipes (2), both sides of the connecting frame (1) are fixedly connected with the communication pipes (2), characterized in that: The connecting frame (1) is provided with a cavity (3) and is communicated with the communicating pipe (2), the cavity (3) is provided with a gate plate (4), the top of the connecting frame (1) is fixedly connected with a first flange plate (5), the first flange plate (5) is fixedly connected with a second flange plate (6) through bolts, the top of the second flange plate (6) is fixedly connected with a fixing cylinder (7), the fixing cylinder (7) is threadedly connected with a threaded rod (8), the top of the threaded rod (8) is fixedly connected with a rotating disc (9), and the bottom end of the threaded rod (8) extends into the cavity (3) and is movably connected with the gate plate (4) through a plane bearing. The threaded rod (8) is provided with a connecting rod (10), the gate plate (4) is provided with a perforation (11), the perforation (11) is provided with a special-shaped block (12), the bottom end of the connecting rod (10) extends into the perforation (11) and is fixedly connected with the special-shaped block (12), the left and right sides of the gate plate (4) are provided with a placing groove (13), the placing groove (13) is provided with a sealing plate (14), the inner wall of the placing groove (13) is provided with a strip-shaped groove (16), the strip-shaped groove (16) is inserted with a sliding rod (17), and the sliding rod (17) is fixedly connected with the sealing plate (14), the outer side of the sliding rod (17) is sleeved with a reset spring (18), the two ends of the reset spring (18) are fixedly connected with the sealing plate (14) and the inner bottom wall of the strip-shaped groove (16), and the top end of the connecting rod (10) is provided with a limiting handle (19).

2. A soft-seal cryogenic gate valve according to claim 1, characterized in that: The shape of the sealing plate (14) is consistent with the shape of the communicating pipe (2), and the side of the sealing plate (14) close to the corresponding communicating pipe (2) is fixedly connected with a sealing plate (14).

3. A soft-seal cryogenic gate valve according to claim 2, characterized in that: The top end of the connecting rod (10) is sleeved with a limiting handle (19), the lower surface of the limiting handle (19) is fixedly connected with a limiting rod (20), and the upper surface of the rotating disc (9) is provided with a limiting groove (21) corresponding to the position of the limiting rod (20).

4. A soft-seal cryogenic gate valve according to claim 3, wherein: The special-shaped block (12) is in contact with the sealing plate (14), and the shape of the gate plate (4) is matched with the shape of the cavity (3).

5. A soft-seal cryogenic gate valve according to claim 4, characterized in that: The number of the strip-shaped grooves (16) is several and is evenly distributed on the gate plate (4), and the shape of the placing groove (13) is consistent with the shape of the sealing plate (14).

6. A soft-seal cryogenic gate valve according to claim 5, wherein: The length of the cavity (3) is greater than the diameter of the gate plate (4), and the shape of the special-shaped block (12) is matched with the shape of the perforation (11).

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