Straight-through type stop valve with pressure relief structure

Abstract

The utility model relates to the technical field of stop valves, in particular to a straight-through type stop valve with a pressure relief structure, which comprises a straight-through type valve body, a communicating conical opening is arranged on the inner side of the straight-through type valve body, and a pressure relief plugging component is arranged on the inner side of the straight-through type valve body; the bottom of the mounting disc is fixedly provided with a threaded seat, the inner side of the threaded seat is in threaded connection with a mounting top plate, the bottom of the mounting top plate is fixedly provided with a telescopic cylinder, the outer side of the telescopic cylinder is sleeved with a compression spring, the bottom of the telescopic cylinder is fixedly provided with a sealing rubber plate, and the lower end of the compression spring abuts against the sealing rubber plate; the lower side of the threaded seat is in threaded connection with a threaded connection conical cylinder, a pressure relief opening is formed in the lower end of the threaded connection conical cylinder, and a pressure relief hole is formed in the mounting disc in a penetrating mode. Through the arranged pressure relief plugging assembly, the pressure relief effect on the inner side of the valve body is achieved, high-pressure damage to the connecting position of a pipeline and the valve caused by too large pressure is avoided, and practicability is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a straight-through gate valve with a pressure relief structure. Background Technology

[0002] Gate valves are a common type of forced-seal valve, widely used in various industrial fields. Depending on the direction of the flow, gate valves can be divided into several types, such as straight-through, direct-flow, angle, and plunger types.

[0003] The straight-through gate valve is mainly composed of valve body, valve cover, valve stem and other main components. Its valve disc is usually made of A42AP material, and the sealing performance is enhanced by tungsten inert gas welding with cobalt chromium hard alloy welding wire Co106. By rotating the handwheel, the threaded guide sleeve is rotated, and the anti-rotation block restricts the rotation of the valve stem. Therefore, the rotational motion of the handwheel is converted into the up and down linear motion of the valve stem. The valve stem pressure makes the valve disc sealing surface and the valve seat sealing surface fit tightly together, thereby preventing the flow of the medium.

[0004] However, after the shut-off valve is closed, the pressure in some pipelines will continue to rise, which will lead to high pressure damage at the connection between the pipeline and the valve, resulting in media leakage. To solve the defects in the existing technology, we propose a straight-through shut-off valve with a pressure relief structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a straight-through shut-off valve with a pressure relief structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A straight-through stop valve with a pressure relief structure includes a straight-through valve body with a connecting cone port on its inner side and a pressure relief sealing assembly on its inner side. The pressure relief sealing assembly includes a mounting disc with a threaded seat fixedly mounted at its bottom. A mounting top plate is screwed onto the inner side of the threaded seat, and a telescopic cylinder is fixedly mounted at the bottom of the mounting top plate. A compression spring is sleeved on the outer side of the telescopic cylinder, and a sealing rubber plate is fixedly mounted at the bottom of the telescopic cylinder. The lower end of the compression spring abuts against the sealing rubber plate. A threaded cone is screwed onto the lower side of the threaded seat, and a pressure relief port is opened at the lower end of the threaded cone. A pressure relief hole is formed through the mounting disc.

[0008] Furthermore, an air inlet pipe and an air outlet pipe are fixedly installed on both sides of the straight-through valve body, and both the air inlet pipe and the air outlet pipe are connected to the internal cavity of the straight-through valve body.

[0009] Furthermore, a sealing top cover is screwed onto the upper side of the straight-through valve body, an airtight gasket is installed at the bottom of the sealing top cover, and a reinforced airtight protective sleeve is fixedly installed at the center position of the upper side of the sealing top cover.

[0010] Furthermore, a rotating groove is provided on the upper side of the mounting disc, and a threaded rod is rotatably mounted on the rotating groove. The threaded rod is screwed through the sealing top cover and the reinforced airtight protective sleeve, and a handwheel is fixedly mounted on the upper end of the threaded rod.

[0011] Furthermore, a sealing ring is fitted on the outer wall of the screw-connected cone, and two sealing rings are provided along the outer wall of the screw-connected cone.

[0012] Furthermore, a plurality of limiting holes are provided on the outer wall of the screwed cone, and limiting screws are screwed into the inner side of the limiting holes, the limiting screws being screwed through to the inner side of the screwed cone.

[0013] Furthermore, the diameter of the sealing rubber plate is larger than that of the pressure relief port, and the sealing rubber plate is pressed against the upper side of the pressure relief port.

[0014] Furthermore, the compression spring is a high-strength, durable compression spring.

[0015] Compared with related technologies, the straight-through stop valve with pressure relief structure proposed in this utility model has the following beneficial effects:

[0016] In this utility model, a straight-through shut-off valve with a pressure relief structure is provided. Through a pressure relief and sealing assembly, a screw-connected cone abuts against the inner side of the connecting cone port inside the straight-through valve body, thereby closing the connection point inside the valve body and achieving a flow-stopping effect. When the pressure inside the valve body is too high, the pressure overcomes the rebound force of the compression spring, pushing the sealing rubber plate pressed against the upper side of the pressure relief port upwards, thus putting the upper side of the pressure relief port into a conductive state. Subsequent fluid enters the inner side of the screw-connected cone through the pressure relief port and is subsequently discharged from the vent hole on the upper side of the mounting disc, achieving a pressure relief effect on the inside of the valve body. This prevents excessive pressure from causing high-pressure damage at the connection between the pipeline and the valve, enhancing the practicality of this utility model. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a straight-through shut-off valve with a pressure relief structure proposed in this utility model;

[0018] Figure 2 This is a three-dimensional cross-sectional view of a straight-through shut-off valve with a pressure relief structure proposed in this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the internal components of a straight-through shut-off valve with a pressure relief structure proposed in this utility model.

[0020] Figure 4 Schematic diagram of three-dimensional exploded structure of pressure relief plugging assembly Figure 1 ;

[0021] Figure 5 Schematic diagram of three-dimensional exploded structure of pressure relief plugging assembly Figure 2 .

[0022] In the figure: 1, straight-through valve body; 2, air inlet pipe; 3, air outlet pipe; 4, communication cone; 5, sealing top cover; 51, reinforced airtight protection cylinder; 52, airtight gasket; 6, pressure relief plugging assembly; 61, mounting disc; 62, rotating groove; 63, threaded seat; 64, mounting top plate; 65, telescopic cylinder; 66, compression spring; 67, sealing rubber plate; 68, threaded cone cylinder; 69, pressure relief port; 610, sealing ring; 611, limiting hole; 612, pressure relief hole; 7, threaded rod; 8, hand wheel. DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with the drawings and embodiments.

[0024] Referring to Figures 1-5 A straight-through stop valve with a pressure relief structure: comprising a straight-through valve body 1, a communication cone 4 is arranged on the inner side of the straight-through valve body 1, and a pressure relief plugging assembly 6 is arranged on the inner side of the straight-through valve body 1; the pressure relief plugging assembly 6 comprises a mounting disc 61, a threaded seat 63 is fixedly installed at the bottom of the mounting disc 61, a mounting top plate 64 is screw-connected and installed on the inner side of the threaded seat 63, a telescopic cylinder 65 is fixedly installed at the bottom of the mounting top plate 64, a compression spring 66 is sleeved on the outer side of the telescopic cylinder 65, a sealing rubber plate 67 is fixedly installed at the bottom of the telescopic cylinder 65, the lower end of the compression spring 66 abuts against the sealing rubber plate 67, a threaded cone cylinder 68 is screw-connected and installed on the lower side of the threaded seat 63, a pressure relief port 69 is formed in the lower end of the threaded cone cylinder 68, and a pressure relief hole 612 is formed through the mounting disc 61.

[0025] Through the above arrangement, the rebound force of the compression spring 66 acts on the sealing rubber plate 67, so that the sealing rubber plate 67 abuts on the upper side of the pressure relief port 69, and the pressure relief port 69 is in a sealed closed state; when the pressure in the valve body is too large, the pressure will overcome the rebound force of the compression spring 66, and the sealing rubber plate 67 will be lifted up, so that the pressure relief port 69 is in an open state; at the same time, the threaded cone cylinder 68 can be screw-connected, the compression spring 66 on the lower side of the mounting disc 61 can be replaced, the compression spring 66 can provide different rebound forces, and the pressure limit value of the pressure relief port 69 is different, so that the pressure relief port 69 is opened, and the application range of the utility model is improved.

[0026] In the present mode, the upper side of the installation disc 61 is provided with a rotating groove 62, and a threaded rod 7 is rotatably installed on the rotating groove 62. The threaded rod 7 is screwed through the sealing top cover 5 and the reinforced airtight sleeve 51. The upper end of the threaded rod 7 is fixedly installed with a hand wheel 8.

[0027] Through the above-mentioned mode, the hand wheel 8 can drive the threaded rod 7 to rotate. The threaded rod 7 drives the lower end of the screwing cone cylinder 68 to move up and down through the screwing driving action, thereby realizing the opening and closing of the internal communication cone port 4 of the valve body, and realizing the blocking and opening functions of the straight-through valve body 1.

[0028] In the present mode, the outer wall of the screwing cone cylinder 68 is sleeved with a sealing ring 610. Two sealing grooves are formed on the outer wall of the screwing cone cylinder 68.

[0029] Through the above-mentioned mode, the sealing ring 610 is provided with two sealing grooves on the outer wall of the screwing cone cylinder 68, which realizes the sealing effect between the screwing cone cylinder 68 and the communication cone port 4, and enhances the sealing performance of the valve body when it is closed.

[0030] In the present mode, a plurality of limiting holes 611 are formed on the outer wall of the screwing cone cylinder 68. Limiting screws are screwingly installed in the limiting holes 611 and screwed into the inner side of the screwing cone cylinder 68.

[0031] Through the above-mentioned mode, the limiting screws are provided, so that the screwing cone cylinder 68 is screwed on the outer side of the threaded seat 63. The inner side of the limiting screw abuts against the outer wall of the threaded seat 63, thereby limiting the rotation freedom of the screwing cone cylinder 68 on the threaded seat 63, preventing the screwing cone cylinder 68 from falling off the threaded seat 63 after long-term use, and improving the connection stability of the screwing cone cylinder 68.

[0032] In the present mode, the sealing rubber plate 67 has a diameter larger than that of the pressure relief port 69, and the sealing rubber plate 67 is press-connected to the upper side of the pressure relief port 69. The compression spring 66 is a high-strength and durable compression spring.

[0033] Through the above-mentioned mode, the compression spring 66 is a high-strength and durable compression spring, which improves the service life of the compression spring 66.

[0034] In the present mode, the straight-through valve body 1 is fixedly installed with an air inlet pipe 2 and an air outlet pipe 3 on both sides, respectively. The air inlet pipe 2 and the air outlet pipe 3 are connected with the internal cavity of the straight-through valve body 1.

[0035] In the present mode, the sealing top cover 5 is screwingly installed on the upper side of the straight-through valve body 1. The sealing top cover 5 is installed with an airtight gasket 52 at the bottom. The sealing top cover 5 is fixedly installed with a reinforced airtight sleeve 51 at the upper side center position.

[0036] Through the above-mentioned mode, the reinforced airtight sleeve 51 is provided to ensure the sealing performance of the screwing position of the threaded rod 7.

[0037] The working principle of the straight-through type stop valve with the pressure relief structure is as follows:

[0038] In use, when the straight-through type valve body 1 is closed to cut off, the threaded rod 7 is rotated by rotating the hand wheel 8, the threaded rod 7 is driven to move downward by the screw joint transmission, the screw joint cone cylinder 68 is pressed in the inner side of the communication cone 4, the sealing ring 610 on the outer side of the screw joint cone cylinder 68 is tightly pressed with the inner wall of the communication cone 4, and the straight-through type valve body 1 is kept closed, when the pressure of the air inlet pipe 2 increases, the pressure of the left chamber of the straight-through type valve body 1 increases, when the pressure reaches the limit value, the sealing rubber plate 67 is lifted upward by the pressure to overcome the resilience of the compression spring 66, and the pressure relief port 69 is in an open state, at this time, the gas enters the inner side of the screw joint cone cylinder 68 through the pressure relief port 69, and then is discharged to the right chamber in the straight-through type valve body 1 through the pressure relief hole 612, and finally flows into the air outlet pipe 3, when the pressure of the left chamber decreases below the limit value, the resilience of the compression spring 66 is greater than the pressure, and the sealing rubber plate 67 continues to abut on the pressure relief port 69, so that the pressure relief port 69 is in a sealed closed state.

[0039] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation by using the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A straight through stop valve with pressure relief structure, characterized by, Including straight through valve body (1), the inside of straight through valve body (1) is provided with communication spout (4), and the inside of straight through valve body (1) is provided with pressure relief plugging assembly (6); The pressure relief plugging assembly (6) includes a mounting disc (61), a threaded seat (63) is fixedly installed at the bottom of the mounting disc (61), a mounting top plate (64) is screwedly installed in the threaded seat (63), a telescopic cylinder (65) is fixedly installed at the bottom of the mounting top plate (64), a compression spring (66) is sleeved on the outer side of the telescopic cylinder (65), a sealing rubber plate (67) is fixedly installed at the bottom of the telescopic cylinder (65), the lower end of the compression spring (66) abuts against the sealing rubber plate (67), a threaded taper cylinder (68) is screwedly installed at the lower side of the threaded seat (63), a pressure relief port (69) is formed at the lower end of the threaded taper cylinder (68), and a pressure relief hole (612) is formed through the mounting disc (61).

2. A straight through globe valve with pressure relief according to claim 1, characterized in that The straight through valve body (1) is fixedly installed with an air inlet pipe (2) and an air outlet pipe (3) on both sides, respectively, and the air inlet pipe (2) and the air outlet pipe (3) are communicated with the inner cavity of the straight through valve body (1).

3. The direct-closing valve with pressure relief according to claim 1, characterized in that The straight through valve body (1) is screwedly installed with a sealing top cover (5) on the upper side, the sealing top cover (5) is installed with an airtight gasket (52) at the bottom, and the sealing top cover (5) is fixedly installed with a reinforced airtight protection cylinder (51) at the center position on the upper side.

4. The direct-closing valve with pressure relief according to claim 1, characterized in that A rotating groove (62) is formed on the upper side of the mounting disc (61), a threaded rod (7) is rotatably installed on the rotating groove (62), the threaded rod (7) is screwedly penetrated through the sealing top cover (5) and the reinforced airtight protection cylinder (51), and a hand wheel (8) is fixedly installed at the upper end of the threaded rod (7).

5. The direct-closing valve with pressure relief according to claim 1, characterized in that A sealing ring (610) is sleeved on the outer wall of the threaded taper cylinder (68), and two rows of sealing rings (610) are arranged on the outer wall of the threaded taper cylinder (68).

6. A direct-closing valve with a pressure relief structure according to claim 1, characterized in that, A plurality of limiting holes (611) are formed on the outer wall of the threaded taper cylinder (68), limiting screws are screwedly installed in the limiting holes (611), and the limiting screws are screwedly penetrated into the inner side of the threaded taper cylinder (68).

7. The direct-closing valve with pressure relief according to claim 1, characterized in that The diameter of the sealing rubber plate (67) is greater than that of the pressure relief port (69), and the sealing rubber plate (67) is press-bonded on the upper side of the pressure relief port (69).

8. The direct-closing valve with pressure relief according to claim 1, characterized in that The compression spring (66) is a high-strength and durable compression spring.

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