Emergency cut-off valve

Abstract

The utility model relates to the technical field of fluid control, in particular to an emergency cut-off valve which comprises a valve body, an inlet and an outlet of the valve body are fixedly connected with a connecting pipe in a through mode, threads are arranged on the periphery of the connecting pipe, and a butt joint mechanism is arranged at the end, away from the valve body, of the connecting pipe. The butt-joint mechanism comprises a butt-joint ring and a connecting ring, the butt-joint ring is fixedly installed at the end, away from the valve body, of the connecting pipe, a circular groove is formed in the end, away from the connecting pipe, of the butt-joint ring, a sealing washer is arranged on the end face, close to the valve body, of the circular groove, and the connecting ring is fixedly installed at the end of the guide pipe; a locking assembly is arranged in the butt joint ring, and a driving assembly is installed on the periphery of the connecting pipe through connecting pipe threads. Through the design that the threaded ring drives the locking assembly, the guide pipe can be assembled and disassembled only by rotating the threaded ring forwards or reversely, multi-bolt alignment and fastening operation of traditional flange connection is not needed, the operation complexity is greatly reduced, and the guide pipe locking device is particularly suitable for scenes needing frequent maintenance or emergency cut-off.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, specifically an emergency shut-off valve. Background Technology

[0002] An emergency shut-off valve is a safety device used to quickly cut off fluid flow in a pipeline in an emergency to prevent the accident from escalating or equipment damage. It is typically installed in piping systems and can automatically or manually close when abnormal conditions (such as overpressure, leakage, fire, etc.) are detected, thereby protecting equipment, the environment, and personnel. In high-risk environments such as industrial, chemical, and power plants, piping systems often transport high-temperature, high-pressure, flammable, explosive, or toxic media. Emergency shut-off valves play a crucial role in these fields, especially in preventing pipeline overpressure.

[0003] An emergency shut-off valve consists of a valve body, valve disc, actuator, spring mechanism, sensor, control system, seals, and connecting flanges or threads. Its connection to pipelines primarily includes flange connections, threaded connections, welded connections, and clamp connections; the specific choice depends on the application scenario and pipeline system requirements. Flange connections are the most common method and are suitable for medium and high pressure pipeline systems.

[0004] Although flange connections are widely used in piping systems in industries such as industrial, chemical, and power plants, there may be some inconveniences in the flange connection process during actual operation:

[0005] Flange connections require precise alignment of valve flanges with pipe flanges, especially for large-diameter or heavy-duty valves, a process that can be very time-consuming and labor-intensive. Furthermore, flange connections necessitate even bolt tightening to ensure a tight seal; uneven bolt tightening can lead to flange deformation or seal failure. Utility Model Content

[0006] The purpose of this invention is to provide an emergency shut-off valve to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] An emergency shut-off valve includes a valve body, wherein both the inlet and outlet of the valve body are fixedly connected to a connecting pipe in a through manner, the outer periphery of the connecting pipe is provided with a thread, and the end of the connecting pipe away from the valve body is provided with a docking mechanism, and the end of the connecting pipe away from the valve body is connected and installed with a guide tube through the docking mechanism.

[0009] The docking mechanism includes a docking ring and a connecting ring. The docking ring is fixedly installed at the end of the connecting pipe away from the valve body. A circular groove is opened at the end of the docking ring away from the connecting pipe. The diameter of the circular groove is larger than the diameter of the connecting pipe. A sealing gasket is provided on the end face of the circular groove near the valve body. The connecting ring is fixedly installed at the end of the guide tube. The diameter of the connecting ring is equal to the diameter of the circular groove in the docking ring.

[0010] The docking ring is provided with a locking component, and a driving component is installed on the periphery of the connecting pipe through the connecting pipe thread. The driving component is used to drive the locking action of the locking component.

[0011] When the conduit and the connecting tube are in the docking state, the connecting end of the conduit extends into the circular groove of the docking ring, the outer periphery of the connecting ring slides in contact with the inner wall of the circular groove of the docking ring, and the driving component controls the locking component to lock the connecting ring in the circular groove of the docking ring, and the connecting ring is pressed in contact with the sealing gasket.

[0012] Furthermore, the locking assembly includes a plurality of mounting grooves one formed on the end face of the docking ring near the connecting pipe, the plurality of mounting grooves one being located near the edge of the end face of the docking ring, and the plurality of mounting grooves one being distributed in a circumferential array about the axis of the docking ring;

[0013] The middle of the first mounting groove is provided with a second mounting groove that communicates with the circular groove of the docking ring. A locking block is slidably installed in the second mounting groove. The locking block has a second inclined surface and a third inclined surface at the top and bottom of its side.

[0014] A reset component is installed between the side of the locking block away from the connecting pipe and the inner wall of the mounting groove 2;

[0015] When the connecting ring is in the locked state, the connecting ring is located between the sealing gasket and multiple locking blocks, and the connecting ring is in compressive contact with the inclined surface of the locking block.

[0016] Furthermore, the reset assembly includes a slide groove formed in the middle of the inner wall of the second mounting groove and a protrusion fixedly installed in the middle of the side of the locking block. The protrusion extends into the slide groove, and a spring is fixedly connected between the bottom surface of the protrusion and the bottom end of the slide groove.

[0017] Furthermore, the drive assembly includes a threaded ring that is installed on the periphery of the connecting pipe via the thread. The end of the threaded ring away from the valve body is rotatably connected to a drive ring that is sleeved on the periphery of the connecting pipe. The end face of the drive ring near the mating ring is fixedly connected to a plurality of push rods. The number of the plurality of push rods is equal to the number of the plurality of mounting slots. The ends of the plurality of push rods away from the drive ring are slidably inserted into the plurality of mounting slots.

[0018] The end of the push rod away from the drive ring is provided with an inclined surface one that works in conjunction with the inclined surface two.

[0019] Furthermore, the outer periphery of the threaded ring is fixedly connected to multiple handles, which are arranged in a circumferential array about the axis of the drive ring.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model, through the design of the threaded ring drive locking component, only requires forward / reverse rotation of the threaded ring to complete the installation and disassembly of the conduit, eliminating the need for the multi-bolt alignment and tightening operations of traditional flange connections, greatly reducing the complexity of operation, and is especially suitable for scenarios requiring frequent maintenance or emergency shut-off.

[0022] 2. This utility model employs the synergistic action of a sealing gasket and locking blocks. When the connecting ring is locked, it is compressed by the circumferentially evenly distributed inclined surfaces of the locking blocks, ensuring a uniform compression seal between the sealing gasket and the connecting ring. This avoids the risk of localized leakage caused by uneven bolt preload in traditional flanges. Simultaneously, the circumferentially distributed locking blocks apply radial compression force to the three pairs of connecting rings through the inclined surfaces, forming multi-point dynamic locking. Compared to static bolt connections, this is more adaptable to pipeline vibration conditions and prevents loosening and failure. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a three-dimensional schematic diagram of the docking mechanism in this utility model;

[0026] Figure 3 yes Figure 2 The right view;

[0027] Figure 4 This is a three-dimensional schematic diagram of the connection relationship between the push rod, the locking block, and the docking ring in this utility model;

[0028] Figure 5 yes Figure 4 Enlarged view of section A;

[0029] Figure 6 This is a schematic diagram showing the connection relationship of the locking blocks in mounting slot two;

[0030] The accompanying figure is labeled as follows:

[0031] 1-Valve body, 2-Connecting pipe, 3-Mating mechanism, 4-Conduit, 5-Thread, 6-Handle, 7-Threaded ring, 8-Drive ring, 9-Push rod, 10-Mounting groove one, 11-Mating ring, 12-Locking block, 13-Connecting ring, 14-Mounting groove two, 15-Bevel one, 16-Bevel two, 17-Bevel three, 18-Sealing gasket, 19-Slide groove, 20-Protrusion, 21-Spring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example:

[0034] Please see Figures 1-6 In this embodiment of the utility model, an emergency shut-off valve includes a valve body 1. The inlet and outlet of the valve body 1 are both fixedly connected to a connecting pipe 2. The outer periphery of the connecting pipe 2 is provided with a thread 5. The end of the connecting pipe 2 away from the valve body 1 is provided with a docking mechanism 3. The end of the connecting pipe 2 away from the valve body 1 is connected and installed with the conduit 4 through the docking mechanism 3.

[0035] The docking mechanism 3 includes a docking ring 11 and a connecting ring 13. The docking ring 11 is fixedly installed at the end of the connecting pipe 2 away from the valve body 1. A circular groove is opened at the end of the docking ring 11 away from the connecting pipe 2. The diameter of the circular groove is larger than the diameter of the connecting pipe 2. A sealing gasket 18 is provided on the end face of the circular groove near the valve body 1. The connecting ring 13 is fixedly installed at the end of the guide tube 4. The diameter of the connecting ring 13 is equal to the diameter of the circular groove in the docking ring 11.

[0036] A locking component is provided in the docking ring 11, and a driving component is installed on the periphery of the connecting pipe 2 through the thread of the connecting pipe 2. The driving component is used to drive the locking action of the locking component.

[0037] When the conduit 4 and the connecting tube 2 are in a docking state, the connecting end of the conduit 4 extends into the circular groove of the docking ring 11, the outer periphery of the connecting ring 13 slides in contact with the inner wall of the circular groove of the docking ring 11, and the drive assembly controls the locking assembly to lock the connecting ring 13 in the circular groove of the docking ring 11, and the connecting ring 13 is pressed in contact with the sealing gasket 18.

[0038] The locking assembly includes multiple mounting slots 10 formed on the end face of the docking ring 11 near the connecting pipe 2. The multiple mounting slots 10 are located near the edge of the end face of the docking ring 11, and the multiple mounting slots 10 are arranged in a circumferential array about the axis of the docking ring 11.

[0039] A second mounting groove 14 is provided in the middle of the mounting groove 10, which is connected to the circular groove of the docking ring 11. A locking block 12 is slidably installed in the second mounting groove 14. An inclined surface 2 16 and an inclined surface 3 17 are respectively provided on the side of the locking block 12 near the 2 at the top and bottom ends.

[0040] A reset assembly is installed between the side of the locking block 12 away from the connecting pipe 2 and the inner wall of the mounting groove 14;

[0041] When the connecting ring 13 is in the locked state, the connecting ring 13 is located between the sealing gasket 18 and the plurality of locking blocks 12, and the connecting ring 13 is in compressive contact with the inclined surface 17 of the locking block 12.

[0042] The reset assembly includes a slide groove 19 located in the middle of the inner wall of the mounting groove 14 and a protrusion 20 fixedly installed in the middle of the side of the locking block 12. The protrusion 20 extends into the slide groove 19, and a spring 21 is fixedly connected between the bottom surface of the protrusion 20 and the bottom end of the slide groove 19.

[0043] The reset component automatically resets the locking block 12 when the threaded ring 7 retracts, releasing the locking force without manual intervention. The disassembly process is completed instantly, significantly improving emergency response efficiency.

[0044] The drive assembly includes a threaded ring 7 installed on the periphery of the connecting pipe 2 via a thread 5. The end of the threaded ring 7 away from the valve body 1 is rotatably connected to a drive ring 8 sleeved on the periphery of the connecting pipe 2. Multiple push rods 9 are fixedly connected to the end face of the drive ring 8 near the docking ring 11. The number of multiple push rods 9 is equal to the number of multiple mounting slots 10, and the ends of the multiple push rods 9 away from the drive ring 8 are slidably inserted into the multiple mounting slots 10 respectively.

[0045] The end of the push rod 9 away from the drive ring 8 is provided with an inclined surface 15 that works in conjunction with the inclined surface 16.

[0046] Among them, multiple handles 6 are fixedly connected to the periphery of the threaded ring 7, and the multiple handles 6 are circumferentially arrayed about the axis of the drive ring 8.

[0047] The emergency shut-off valve provided by this utility model, when docked:

[0048] First, a connecting ring 13 is fixedly installed at the end of the conduit 4. Then, the end of the conduit 4 is inserted into the circular groove of the mating ring 11 until the connecting ring 13 contacts the sealing gasket 18 in the circular groove of the mating ring 11. Next, the threaded ring 7 is rotated by the handle 6, causing the threaded ring 7 to drive the drive ring 8 to move closer to the mating ring 11. The movement of the drive ring 8 causes the front ends of multiple push rods 9 to move in the mounting groove 10. During the movement of the push rods 9, the inclined surface 15 at the front end of the push rod 9 contacts the inclined surface 16 of the locking block 12. As the push rod 9 continues to move, the locking block 12 is subjected to force and interacts in the mounting groove 14 towards the circular groove of the mating ring 11. Thus, the inclined surface 17 of multiple locking blocks 12 is pressed against the connecting ring 13. At this time, the sealing ring 13 and the sealing gasket 18 are pressed against each other to achieve a seal. The connection between the conduit 4 and the connecting pipe 2 is completed because the connecting ring 13 is restricted in both the circumferential and radial directions.

[0049] When it is necessary to disassemble the conduit 4, the drive ring 8 is moved in the opposite direction by rotating the threaded ring 7. As the push rod 9 and the locking block 12 gradually separate, the restoring force of the spring 21 drives the locking block 12 to retract into the mounting groove 14, thereby releasing the axial restriction on the connecting ring 13. At this time, the conduit 4 can be removed from the circular groove of the docking ring 11 to complete the disassembly work.

[0050] Therefore, compared with the traditional flange connection method, the design of the locking component driven by the threaded ring 7 allows the installation and disassembly of the conduit 4 to be completed by simply rotating the threaded ring 7 in both directions. This eliminates the need for the multi-bolt alignment and tightening operations required by traditional flange connections, significantly reducing operational complexity. It is especially suitable for scenarios requiring frequent maintenance or emergency shut-off.

[0051] Furthermore, this invention employs the synergistic action of the sealing gasket 18 and the locking block 12. When the connecting ring 13 is locked, it is compressed by the circumferentially evenly distributed inclined surfaces of the locking blocks 12, ensuring a uniform compression seal between the sealing gasket 18 and the connecting ring 13. This avoids the risk of localized leakage caused by uneven bolt preload in traditional flanges. Simultaneously, the circumferentially evenly distributed locking blocks 12 apply radial compression force to the connecting ring 13 through the inclined surface 17, forming multi-point dynamic locking. Compared to static bolt connections, this is more adaptable to pipeline vibration conditions and prevents loosening and failure.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An emergency shut-off valve, comprising a valve body (1), wherein the inlet and outlet of the valve body (1) are both fixedly connected to a connecting pipe (2), characterized in that, The connecting pipe (2) is provided with a thread (5) on its periphery. The end of the connecting pipe (2) away from the valve body (1) is provided with a docking mechanism (3). The end of the connecting pipe (2) away from the valve body (1) is connected and installed with the conduit (4) through the docking mechanism (3). The docking mechanism (3) includes a docking ring (11) and a connecting ring (13). The docking ring (11) is fixedly installed at the end of the connecting pipe (2) away from the valve body (1). A circular groove is opened at the end of the docking ring (11) away from the connecting pipe (2). The diameter of the circular groove is larger than the diameter of the connecting pipe (2). A sealing gasket (18) is provided on the end face of the circular groove near the valve body (1). The connecting ring (13) is fixedly installed at the end of the guide tube (4). The diameter of the connecting ring (13) is equal to the diameter of the circular groove in the docking ring (11). A locking component is provided in the docking ring (11), and a driving component is installed on the periphery of the connecting pipe (2) through the thread of the connecting pipe (2). The driving component is used to drive the locking action of the locking component. When the conduit (4) and the connecting pipe (2) are in a docking state, the connecting end of the conduit (4) extends into the circular groove of the docking ring (11), the outer periphery of the connecting ring (13) slides in contact with the inner wall of the circular groove of the docking ring (11), and the drive assembly controls the locking assembly to lock the connecting ring (13) in the circular groove of the docking ring (11), and the connecting ring (13) is pressed in contact with the sealing gasket (18).

2. An emergency shut-off valve according to claim 1, characterized in that, The locking assembly includes a plurality of mounting slots (10) formed on the end face of the docking ring (11) near the connecting pipe (2). The plurality of mounting slots (10) are located near the edge of the end face of the docking ring (11), and the plurality of mounting slots (10) are arranged in a circumferential array about the axis of the docking ring (11). The middle position of the first mounting groove (10) is provided with a second mounting groove (14) that communicates with the circular groove of the docking ring (11). A locking block (12) is slidably installed in the second mounting groove (14). The locking block (12) has a second inclined surface (16) and a third inclined surface (17) respectively at the top and bottom ends on the side of the locking block (12) near 2. A reset assembly is installed between the side of the locking block (12) away from the connecting pipe (2) and the inner wall of the mounting groove (14); When the connecting ring (13) is in a locked state, the connecting ring (13) is located between the sealing gasket (18) and a plurality of locking blocks (12), and the connecting ring (13) is in pressure contact with the inclined surface (17) of the locking block (12).

3. An emergency shut-off valve according to claim 2, characterized in that, The reset assembly includes a slide groove (19) located in the middle of the inner wall of the mounting groove (14) and a protrusion (20) fixedly installed in the middle of the side of the locking block (12). The protrusion (20) extends into the slide groove (19), and a spring (21) is fixedly connected between the bottom surface of the protrusion (20) and the bottom end of the slide groove (19).

4. An emergency shut-off valve according to claim 2, characterized in that, The drive assembly includes a threaded ring (7) installed on the periphery of the connecting pipe (2) via the thread (5). The end of the threaded ring (7) away from the valve body (1) is rotatably connected to a drive ring (8) sleeved on the periphery of the connecting pipe (2). The end face of the drive ring (8) near the docking ring (11) is fixedly connected to a plurality of push rods (9). The number of the plurality of push rods (9) is equal to the number of the plurality of mounting slots (10), and the ends of the plurality of push rods (9) away from the drive ring (8) are slidably inserted into the plurality of mounting slots (10). The push rod (9) is provided with an inclined surface (15) at the end away from the drive ring (8) to cooperate with the inclined surface (16).

5. An emergency shut-off valve according to claim 4, characterized in that, The outer periphery of the threaded ring (7) is fixedly connected to a plurality of handles (6), which are arranged in a circumferential array about the axis of the drive ring (8).

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