Corrugated pipe stop valve

Abstract

The utility model discloses a corrugated pipe stop valve, which belongs to the technical field of stop valves, aims at solving the problems of poorer sealing performance and poorer implementation performance, and comprises a stop valve body, a valve cavity is arranged in the stop valve body, a cover plate is fixedly connected to the top end of the stop valve body, a sealing gasket is fixedly connected between the cover plate and the stop valve body, and the sealing gasket is fixedly connected with the valve cavity. A sealing bearing is fixedly connected to the middle of the cover plate, a connecting shaft is fixedly connected to an inner ring of the sealing bearing, a rotating handle is fixedly connected to the top end of the connecting shaft, external threads are arranged on the outer side of the bottom of the connecting shaft, and a sealing mechanism is arranged in the valve cavity through the connecting shaft. The sealing washer 101 is made of rubber, and the outer diameter of the sealing washer 101 is the same as the outer diameter of the stop valve body 1 and the outer diameter of the cover plate 102. Through the sealing mechanism, the connecting shaft rotates in the sealing bearing under the rotation of the rotating handle, and meanwhile, the sealing mechanism moves in the valve cavity to seal the valve cavity in cooperation with the rotation of the external threads, so that the sealing performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, and in particular relates to a bellows stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the valve stem will bend. Bellows stop valves are generally used in dangerous working conditions such as flammable, explosive, and toxic.

[0003] The prior art discloses a bellows stop valve with patent announcement number CN218326227U. The guide tube is installed on the valve body in the above patent. A waterproof gap is formed between the guide tube and the valve body. The rust-proof cylinder slides in the waterproof gap. When the baffle is opened, the rust-proof cylinder covers the bellows. Water does not contact the bellows, so that scale does not adhere to the bellows. This solves the problem of the bellows being hindered from expanding and contracting after scale adheres to the bellows. However, the following deficiencies still exist in actual use: from a practical point of view, the stop valve moves the threads in the valve cavity by rotating the driving rod during the sealing operation, so that the baffle moves to seal it. Due to the high pressure in the valve cavity, the driving rod is subjected to a large pressure during the thread movement, so that it is difficult to rotate, so that the inside of the valve cavity is completely sealed, resulting in poor sealing. At the same time, the driving rod will move threads, so that corresponding configuration is required during its installation, which greatly reduces its feasibility.

[0004] Therefore, a bellows stop valve is needed to solve the problems of poor sealing and poor practicability in the prior art. Utility Model Content

[0005] The utility model aims to provide a bellows stop valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bellows stop valve, comprising a stop valve body, a valve cavity is arranged in the stop valve body, a cover plate is fixedly connected to the top end of the stop valve body, a sealing gasket is fixedly connected between the cover plate and the stop valve body, a sealing bearing is fixedly connected in the middle of the cover plate, a connecting shaft is fixedly connected to the inner ring of the sealing bearing, a rotating handle is fixedly connected to the top end of the connecting shaft, an external thread is arranged on the outer side of the bottom of the connecting shaft, and a sealing mechanism is arranged in the valve cavity through the connecting shaft.

[0007] It should be noted in the solution that the sealing gasket is made of rubber and has an outer diameter that is the same as the outer diameters of the stop valve body and the cover plate. The sealing between the cover plate and the stop valve body is enhanced by the setting of the sealing gasket.

[0008] It is further worth explaining that the sealing mechanism includes an anti-rust cylinder, which is movable in the valve cavity, a baffle is fixedly connected to the bottom of the anti-rust cylinder, an internal thread groove is provided in the middle of the anti-rust cylinder and is threadedly connected to the external thread, a limiting groove is provided in the anti-rust cylinder near the outside of the internal thread groove, a limiting rod is slidably connected in the limiting groove and fixedly connected to the top of the valve cavity, a limiting ring is fixedly connected to the bottom end of the limiting rod, a retaining ring is movable through the outside of the limiting rod, a spring is sleeved on the top of the outside of the limiting rod between the retaining ring and the top wall of the stop valve body, and the stability of the anti-rust cylinder is improved by the limiting rod sliding in the limiting groove, thereby improving the sealing performance, and at the same time, the elastic action of the spring on the retaining ring makes the retaining ring seal the limiting groove and the internal thread groove on the anti-rust cylinder, thereby improving the sealing performance.

[0009] It should be further explained that the rust-proof tube is arranged as a middle protrusion and the outer wall of the rust-proof tube is arranged to fit the valve cavity, and the inner diameter of the limiting ring is arranged to be consistent with that of the limiting groove.

[0010] As a preferred embodiment, the internal thread groove and the connecting shaft are set to have the same length in the valve cavity, and a circular hole is provided in the middle of the retaining ring that is consistent with the protrusion of the anti-rust cylinder.

[0011] As a preferred embodiment, four limit rods are provided, and the four limit rods are evenly arranged in the valve cavity and four corresponding limit grooves are provided in the rust-proof cylinder.

[0012] Compared with the prior art, the bellows stop valve provided by the utility model at least comprises the following

[0013] Beneficial effects:

[0014] (1) Through the provided sealing mechanism, when the handle is turned, the connecting shaft rotates in the sealing bearing, and at the same time, the external thread rotates, so that the sealing mechanism moves in the valve cavity to seal it, thereby improving the sealing performance.

[0015] (2) By setting a sealing bearing on the cover plate, the connecting shaft is driven to rotate on the sealing bearing when the handle is turned and the shaft is always in the same position, and the sealing mechanism is used for sealing. This process has a simple structure and greatly improves the feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2It is a schematic diagram of the internal cutaway structure of the utility model;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 It is a schematic diagram of the split structure of the utility model.

[0020] In the figure: 1. stop valve body; 101. sealing gasket; 102. cover plate; 103. sealing bearing; 104. valve chamber; 2. turning handle; 201. connecting shaft; 202. external thread; 3. sealing mechanism; 301. rust-proof cylinder; 302. limiting groove; 303. internal thread groove; 304. limiting rod; 305. limiting ring; 306. retaining ring; 307. spring; 308. baffle. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] See also Figure 1-4 The utility model provides a bellows stop valve, including a stop valve body 1, a valve cavity 104 is arranged in the stop valve body 1, a cover plate 102 is fixedly connected to the top of the stop valve body 1, a sealing gasket 101 is fixedly connected between the cover plate 102 and the stop valve body 1, a sealing bearing 103 is fixedly connected in the middle of the cover plate 102, a connecting shaft 201 is fixedly connected to the inner ring of the sealing bearing 103, a rotating handle 2 is fixedly connected to the top of the connecting shaft 201, an external thread 202 is arranged on the outer side of the bottom of the connecting shaft 201, and a sealing mechanism 3 is arranged in the valve cavity 104 through the connecting shaft 201.

[0023] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth explaining in detail that the sealing gasket 101 is made of rubber and has an outer diameter that is the same as the outer diameters of the stop valve body 1 and the cover plate 102. The sealing between the cover plate 102 and the stop valve body 1 is enhanced by the setting of the sealing gasket 101.

[0024] According to the above working process, it can be known that: through the provided sealing mechanism 3, when the handle 2 is turned, the connecting shaft 201 is rotated in the sealing bearing 103, and at the same time, the external thread 202 is rotated, so that the sealing mechanism 3 moves in the valve cavity 104 to seal it, thereby improving the sealing performance.

[0025] Further as Figure 2 , Figure 3 and Figure 4As shown, it is worth specifically explaining that the sealing mechanism 3 includes an anti-rust cylinder 301, which is movable in the valve cavity 104, and a baffle 308 is fixedly connected to the bottom of the anti-rust cylinder 301, an internal thread groove 303 is provided in the middle of the anti-rust cylinder 301 and is threadedly connected to the external thread 202, a limiting groove 302 is provided in the anti-rust cylinder 301 near the outer side of the internal thread groove 303, a limiting rod 304 is slidably connected in the limiting groove 302 and fixedly connected to the top of the valve cavity 104, a limiting ring 305 is fixedly connected to the bottom end of the limiting rod 304, a retaining ring 306 is movable through the outer side of the limiting rod 304, a spring 307 is sleeved on the outer top of the limiting rod 304 between the retaining ring 306 and the inner top wall of the stop valve body 1, the anti-rust cylinder 301 is set as a middle protrusion and the outer wall of the anti-rust cylinder 301 is fitted with the valve cavity 104, and the limiting The inner diameter of the positioning ring 305 is set to be consistent with that of the limiting groove 302, the inner thread groove 303 is set to be consistent with the length of the connecting shaft 201 in the valve cavity 104, a circular hole is set in the middle of the retaining ring 306 which is consistent with the protrusion of the anti-rust cylinder 301, and four limiting rods 304 are set. The four limiting rods 304 are evenly arranged in the valve cavity 104 and have four corresponding limiting grooves 302 in the anti-rust cylinder 301. By cooperating with the rotation of the rotating handle 2, the anti-rust cylinder 301 moves on the inner thread of the stop valve body 1, and the limiting rod 304 is limited and slid in the limiting groove 302 to improve the stability of the anti-rust cylinder 301, thereby improving the sealing performance. At the same time, the elastic effect of the spring 307 on the retaining ring 306 makes the retaining ring 306 seal the limiting groove 302 and the inner thread groove 303 on the anti-rust cylinder 301 to improve the sealing performance.

[0026] This scheme has the following working process: when this device is used, the two ends of the stop valve body 1 are connected to the pipeline, and the rotating handle 2 is rotated to make the connecting shaft 201 rotate on the cover plate 102 through the sealing bearing 103, so that the external thread 202 rotates to drive the anti-rust cylinder 301 to move, and the stability of the anti-rust cylinder 301 during movement is guaranteed by the limiting effect of the limiting rod 304 in the limiting groove 302. At the same time, with the effect of the spring 307, it provides elasticity to the retaining ring 306, improves the sealing between the valve cavity 104, and avoids water penetration and erosion of the connecting shaft 201. When the anti-rust cylinder 301 moves, the baffle plate 308 fixed at its bottom moves, and the contact between the baffle plate 308 and the valve cavity 104 blocks the water flow in the stop valve body 1 to prevent the water flow and cut off the water flow. Since the connecting shaft 201 does not move during rotation, the rotating handle 2 is rotated to strengthen the sealing between the sealing mechanism 3 and the stop valve body 1, thereby improving the sealing effect.

[0027] In summary: through the provided sealing mechanism 3, when the handle 2 is rotated, the connecting shaft 201 is rotated in the sealing bearing 103, and at the same time, the external thread 202 is rotated, so that the sealing mechanism 3 moves in the valve cavity 104 to seal it, thereby improving the sealing performance; through the sealing bearing 103 provided on the cover plate 102, when the handle 2 is rotated, the connecting shaft 201 is driven to rotate on the sealing bearing 103 and is always in the same position, and is sealed in cooperation with the sealing mechanism 3. This process has a simple structure and greatly improves the feasibility.

Claims

1. A bellows stop valve, comprising a stop valve body (1), characterized in that: A valve cavity (104) is provided in the stop valve body (1); a cover plate (102) is fixedly connected to the top of the stop valve body (1); a sealing gasket (101) is fixedly connected between the cover plate (102) and the stop valve body (1); a sealing bearing (103) is fixedly connected in the middle of the cover plate (102); a connecting shaft (201) is fixedly connected to the inner ring of the sealing bearing (103); a rotating handle (2) is fixedly connected to the top of the connecting shaft (201); an external thread (202) is provided on the outer side of the bottom of the connecting shaft (201); and a sealing mechanism (3) is provided in the valve cavity (104) via the connecting shaft (201).

2. A bellows stop valve according to claim 1, characterized in that: The sealing gasket (101) is made of rubber and has an outer diameter that is the same as the outer diameters of the stop valve body (1) and the cover plate (102).

3. The bellows stop valve according to claim 1, characterized in that: The sealing mechanism (3) comprises an anti-rust cylinder (301), the anti-rust cylinder (301) is movable in the valve cavity (104), a baffle (308) is fixedly connected to the bottom of the anti-rust cylinder (301), an internal thread groove (303) is provided in the middle of the anti-rust cylinder (301) and is threadedly connected to the external thread (202), a limiting groove (302) is provided in the anti-rust cylinder (301) near the outer side of the internal thread groove (303), a limiting rod (304) is slidably connected in the limiting groove (302) and is fixedly connected to the top of the valve cavity (104), a limiting ring (305) is fixedly connected to the bottom end of the limiting rod (304), a retaining ring (306) is movably passed through the outer side of the limiting rod (304), and a spring (307) is sleeved on the outer top of the limiting rod (304) between the retaining ring (306) and the inner top wall of the stop valve body (1).

4. A bellows stop valve according to claim 3, characterized in that: The anti-rust cylinder (301) is arranged as a middle protrusion and the outer wall of the anti-rust cylinder (301) is arranged to fit the valve cavity (104). The inner diameters of the limiting ring (305) and the limiting groove (302) are arranged to be consistent.

5. A bellows stop valve according to claim 4, characterized in that: The inner thread groove (303) and the connecting shaft (201) are arranged with the same length in the valve cavity (104), and a circular hole is arranged in the middle of the retaining ring (306) which is consistent with the protrusion of the rust-proof cylinder (301).

6. The bellows stop valve according to claim 3, characterized in that: Four limiting rods (304) are provided, and the four limiting rods (304) are evenly arranged in the valve cavity (104) and four corresponding limiting grooves (302) are provided in the rust-proof cylinder (301).

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