Double-seal stop valve

Abstract

The utility model relates to the field of stop valves, in particular to a double-seal stop valve which comprises a valve body, one side of the valve body is connected with a first butt joint pipe, the side, away from the first butt joint pipe, of the valve body is connected with a second butt joint pipe, and a rotary disc is arranged above the valve body and used for opening and closing the stop valve. The double-layer sealing assembly is arranged in the valve body and used for double-layer sealing of the valve body; the driving assembly is arranged in the valve body and used for driving the double-layer sealing assembly to be opened and closed. The connecting rod drives the conical block and the connecting cylinder to move downwards, the second sealing ring below the conical block is attached to the limiting ring, the through hole is sealed, a first sealing structure is formed, meanwhile, the connecting cylinder pushes the annular clamping groove to extrude the rubber ring, the rubber ring is tightly attached to the first sealing ring below, and a second sealing structure is formed. Therefore, a double-sealing structure of the stop valve is achieved, practicability of the stop valve is improved, and when one sealing structure is damaged, use of the stop valve is not affected.

Description

Technical Field

[0001] The utility model relates to the field of stop valves, in particular to a double-sealed 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 large, otherwise the valve stem will bend.

[0003] After searching, an invention patent with the publication number of CN117662811A specifically discloses a wellhead self-cleaning high-pressure throttling stop valve, including a valve body, a pressure gauge 1 is arranged on one end of the valve body, an electromagnetic gas valve is connected to one end of the valve body, and a pressure gauge 2 is arranged on the other end of the valve body; an inner pipe is connected to one end of the valve body, a tenon is inserted into the valve body, a top pipe is arranged for sealing the tenon pipe, a top cover is arranged on the top of the top pipe, a valve stem is rotatably arranged at the center of the top cover, a plug is inserted into the top pipe and the tenon, and the lower end of the valve stem is connected to the top center position of the plug, and the top of the valve stem is connected to the top section through the top support plate; a pressure control element cleaning mechanism is arranged on one side of the valve body. Under the cooperation of the pressure control element cleaning mechanism and the cleaning control module, the straight-through hole, the lower row hole and the straight row hole are automatically cleaned, and the hydraulic cylinder top rod can also be controlled to extend, so that the tenon and the plug are completely out of the top pipe, so as to facilitate manual external cleaning, which is more convenient.

[0004] In the above patent, the cleaning mechanism of the pressure control element is coordinated with the cleaning control module to achieve the effect of facilitating the cleaning of the inside of the stop valve. However, in actual use, there is only a single set of seals inside the commonly used stop valve. Long-term use will cause the seal to be loose. When the seal leaks, the stop valve will lose its effect, affecting the normal use of the stop valve.

[0005] Therefore, it is necessary to invent a double-seal stop valve to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a double-sealed stop valve, which realizes the double-layer sealing effect of the stop valve by the sealing of the tapered block and the through hole and the connection tube pushing the rubber ring and the sealing ring to fit together, so as to solve the problem that the stop valve in the prior art has only a single set of sealing structure, resulting in poor service life and sealing effect.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-sealed stop valve, comprising: a valve body, one side of the valve body is connected to a butt-joint pipe 1, the side of the valve body away from the butt-joint pipe 1 is connected to a butt-joint pipe 2, a turntable is arranged above the valve body, and the turntable is used to open and close the stop valve;

[0008] A double-layer sealing component is arranged in the valve body and is used for double-layer sealing of the valve body;

[0009] The driving assembly is arranged in the valve body and is used for driving the opening and closing of the double-layer sealing assembly.

[0010] Preferably, the double-layer sealing assembly includes: a partition, which is installed in the valve body, and the partition divides the inner part of the valve body into two parts. A through hole is opened on the partition, and a limiting ring is fixedly connected to the inner wall of the through hole. A sealing ring is fixedly connected above the partition, and the through hole is arranged in the sealing ring.

[0011] Preferably, a conical block is provided above the through hole, a sealing ring 2 is fixedly connected below the conical block, a connecting rod is fixedly connected above the conical block, guide grooves are symmetrically provided on the connecting rod, a guide block is slidably connected in the guide groove, a rubber ring is sleeved on the connecting rod, and the inner wall of the rubber ring is fixedly connected to the guide block.

[0012] Preferably, a connecting tube is sleeved and fixed on the connecting rod, and an annular groove is opened at the lower edge of the inner wall of the connecting tube, and the annular groove is fit-connected with a rubber ring. A spring is sleeved on the connecting rod, and the upper part of the spring is fit-connected with the upper part of the inner wall of the connecting tube, and the lower part of the spring is fit-connected with the rubber ring.

[0013] Preferably, the driving assembly includes: a fixed cylinder, which is connected through the top of the valve body, an annular groove is opened on the inner wall of the fixed cylinder, a retaining ring is slidably connected in the annular groove, a threaded cylinder is connected through the fixed cylinder, the threaded cylinder is fixedly sleeved with the retaining ring, and the top of the threaded cylinder is fixedly connected to the turntable.

[0014] Preferably, a bolt is threadedly connected to the threaded barrel, a limiting block is symmetrically connected to the bolt, a limiting groove is symmetrically provided on the inner wall of the fixed barrel, the limiting groove is slidably connected to the limiting block, and the bolt is fixedly connected to the connecting rod below.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] The connecting rod drives the conical block and the connecting cylinder to move downward, so that the sealing ring 2 below the conical block fits with the limit ring to seal the through hole to form a first sealing structure. At the same time, the connecting cylinder pushes the annular groove to squeeze the rubber ring, so that the rubber ring fits tightly with the sealing ring 1 below to form a second sealing structure. In this way, the double sealing structure of the stop valve is realized, the practicability of the stop valve is improved, and when one sealing structure is damaged, it will not affect its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the partition layout structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixing cylinder of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the connecting tube of the utility model;

[0022] Figure 5 This is a schematic diagram of the conical block structure of the utility model.

[0023] Description of reference numerals:

[0024] 001, valve body; 101, butt pipe 1; 102, butt pipe 2; 103, turntable; 002, double-layer sealing assembly; 201, partition; 202, through hole; 203, limit ring; 204, sealing ring 1; 205, conical block; 206, sealing ring 2; 207, connecting rod; 208, guide groove; 209, guide block; 210, rubber ring; 211, connecting tube; 212, annular groove; 213, spring; 003, drive assembly; 301, fixing tube; 302, annular groove; 303, retaining ring; 304, threaded tube; 305, bolt; 306, limit block; 307, limit groove. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-5A double-seal stop valve shown in the figure comprises: a valve body 001, one side of the valve body 001 is connected to a butt-joint pipe 101, a side of the valve body 001 away from the butt-joint pipe 101 is connected to a butt-joint pipe 2 102, a rotary disk 103 is arranged above the valve body 001, and the rotary disk 103 is used to open and close the stop valve;

[0027] The double-layer sealing component 002 is arranged in the valve body 001 and is used for double-layer sealing of the valve body 001;

[0028] The driving component 003 is arranged in the valve body 001 and is used to drive the double-layer sealing component 002 to open and close.

[0029] like Figure 2-5 As shown, the double-layer sealing component 002 includes: a partition 201, which is installed in the valve body 001, and the partition 201 divides the interior of the valve body 001 into two parts. A through hole 202 is opened on the partition 201, and a limiting ring 203 is fixedly connected to the inner wall of the through hole 202. A sealing ring 204 is fixedly connected above the partition 201, and the through hole 202 is arranged in the sealing ring 204. The limiting ring 203 on the inner wall of the through hole 202 fits with the sealing ring 206 under the conical block 205 to ensure the sealing of the through hole 202.

[0030] like Figure 2-5 As shown, a conical block 205 is arranged above the through hole 202, a sealing ring 206 is fixedly connected below the conical block 205, a connecting rod 207 is fixedly connected above the conical block 205, guide grooves 208 are symmetrically provided on the connecting rod 207, a guide block 209 is slidably connected in the guide groove 208, a rubber ring 210 is sleeved on the connecting rod 207, the inner wall of the rubber ring 210 is fixedly connected to the guide block 209, and the rubber ring 210 can move along the connecting rod 207 through the cooperation between the guide block 209 and the guide groove 208.

[0031] like Figure 2-5 As shown, a connecting tube 211 is sleeved and fixed on the connecting rod 207, and an annular groove 212 is opened at the lower edge of the inner wall of the connecting tube 211. The annular groove 212 is closely connected to the rubber ring 210. A spring 213 is sleeved on the connecting rod 207. The upper part of the spring 213 is closely connected to the upper part of the inner wall of the connecting tube 211, and the lower part of the spring 213 is closely connected to the rubber ring 210. The spring 213 on the connecting rod 207 can push the rubber ring 210 to fit with the sealing ring 204.

[0032] like Figure 1 and Figure 3As shown, the driving assembly 003 includes: a fixed cylinder 301, which is connected through the top of the valve body 001, an annular groove 302 is opened on the inner wall of the fixed cylinder 301, a retaining ring 303 is slidably connected in the annular groove 302, a threaded cylinder 304 is connected through the fixed cylinder 301, the threaded cylinder 304 is fixedly sleeved with the retaining ring 303, and the top of the threaded cylinder 304 is fixedly connected to the turntable 103, and the threaded cylinder 304 can rotate stably through the cooperation of the retaining ring 303 and the annular groove 302.

[0033] like Figure 1 and Figure 3 As shown, the threaded cylinder 304 has a bolt 305 connected to its inner thread, a limiting block 306 is symmetrically connected to the bolt 305, a limiting groove 307 is symmetrically provided on the inner wall of the fixed cylinder 301, the limiting groove 307 is slidably connected to the limiting block 306, and the bolt 305 is fixedly connected to the connecting rod 207 at the bottom, and the limiting groove 307 limits the limiting block 306, so that the bolt 305 can move downward and push the connecting rod 207 to move.

[0034] How this utility works:

[0035] Refer to the instruction manual Figure 1-5 By rotating the turntable 103, the turntable 103 drives the threaded cylinder 304 to rotate, and the threaded cylinder 304 drives the bolt 305 to move downward, so that the bolt 305 pushes the connecting rod 207 to move, so that the connecting rod 207 pushes the conical block 205 to fit with the through hole 202, so that the sealing ring 206 fits with the limit ring 203, so that the through hole 202 is completely closed, and at the same time, the upper connecting cylinder 211 drives the annular groove 212 to squeeze the rubber ring 210, so that the rubber ring 210 and the sealing ring 1 204 fit tightly, and the spring 213 can ensure that the rubber ring 210 automatically resets when the through hole 202 is in the open state, thereby forming a second sealing structure for the connecting cylinder 211.

[0036] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double seal stop valve, characterized in that: include: A valve body (001), wherein one side of the valve body (001) is connected to a butt-joint pipe 1 (101), and a side of the valve body (001) away from the butt-joint pipe 1 (101) is connected to a butt-joint pipe 2 (102), and a rotating disk (103) is arranged above the valve body (001), and the rotating disk (103) is used to open and close the stop valve; A double-layer sealing component (002) is arranged in the valve body (001) and is used for double-layer sealing of the valve body (001); A driving assembly (003) is disposed in the valve body (001) and is used to drive the double-layer sealing assembly (002) to open and close; A conical block (205) is arranged above the through hole (202), a sealing ring (206) is fixedly connected below the conical block (205), a connecting rod (207) is fixedly connected above the conical block (205), a guide groove (208) is symmetrically provided on the connecting rod (207), a guide block (209) is slidably connected in the guide groove (208), a rubber ring (210) is sleeved on the connecting rod (207), and the inner wall of the rubber ring (210) is slidably connected to the guide block (209) is fixedly connected, a connecting tube (211) is sleeved and fixed on the connecting rod (207), an annular groove (212) is opened at the lower edge of the inner wall of the connecting tube (211), and the annular groove (212) is closely connected to the rubber ring (210), a spring (213) is sleeved on the connecting rod (207), the upper part of the spring (213) is closely connected to the upper part of the inner wall of the connecting tube (211), and the lower part of the spring (213) is closely connected to the rubber ring (210).

2. A double seal stop valve according to claim 1, characterized in that: The double-layer sealing assembly (002) comprises: a partition (201), the partition (201) being installed in the valve body (001), the partition (201) dividing the interior of the valve body (001) into two parts, a through hole (202) being opened on the partition (201), a limit ring (203) being fixedly connected to the inner wall of the through hole (202), a sealing ring (204) being fixedly connected above the partition (201), and the through hole (202) being arranged in the sealing ring (204).

3. A double seal stop valve according to claim 1, characterized in that: The driving assembly (003) comprises: a fixed cylinder (301), the fixed cylinder (301) is connected through the top of the valve body (001), an annular groove (302) is provided on the inner wall of the fixed cylinder (301), a retaining ring (303) is slidably connected in the annular groove (302), a threaded cylinder (304) is connected through the fixed cylinder (301), the threaded cylinder (304) and the retaining ring (303) are sleeved and fixed, and the top of the threaded cylinder (304) is fixedly connected to the rotating disk (103).

4. A double seal stop valve according to claim 3, characterized in that: The threaded cylinder (304) is internally threadedly connected with a bolt (305), a limit block (306) is symmetrically connected to the bolt (305), a limit groove (307) is symmetrically provided on the inner wall of the fixed cylinder (301), the limit groove (307) is slidably connected to the limit block (306), and the lower part of the bolt (305) is fixedly connected to the connecting rod (207).

Images