Flat gate valve with double gate plates

Abstract

The invention relates to the technical field of gate valves, and provides a double-gate-plate flat gate valve which comprises a gate valve body with a water through hole and a mounting hole, double gate plates arranged in the mounting hole and an inner control part located in the mounting hole. And the mounting hole and the pipeline are respectively communicated with the water through hole. The double-gate plate comprises a double-gate plate body with a first pushing hole and a first pushing piece in the first pushing hole. The other end of the control part is arranged on the gate valve main body; the control part is provided with a conversion space and comprises a conversion structure in the conversion space, and the conversion structure is connected to the first pushing piece. The control part pushes the double gate plates to move at a second speed until the first pushing part is partially located in the water through hole, so that the water hammer phenomenon is generated, the conversion structure is driven, the control part is disconnected from the gate valve body, and the water through hole is rapidly closed. The double-gate-plate flat gate valve can be switched between slow closing of a pipeline and quick closing of the pipeline.

Description

Technical Field

[0001] The present application relates to the technical field of gate valves, and in particular to a double gate plate flat gate valve. Background Art

[0002] The double gate plate flat gate valve is a high-performance valve, which is widely used in occasions that require high sealing performance, high pressure resistance and corrosion resistance; it is mainly used to open or close pipelines.

[0003] In some emergency situations, the pipeline needs to be quickly closed. However, the existing double gate plate flat gate valve controls the closing of the pipeline through the cooperation of internal and external threads, and the above control method is too slow; and water hammer phenomenon will also occur when the pipeline is quickly closed, resulting in damage to the pipeline. Summary of the Invention

[0004] The embodiments of the present application provide a double gate plate flat gate valve, which can improve the technical problems in the related art that the pipeline cannot be quickly closed and the damage to the pipeline caused by the water hammer phenomenon cannot be reduced when the pipeline is quickly closed.

[0005] The embodiments of the present application provide a double gate plate flat gate valve, including: A gate valve body having a water through hole and a mounting hole, both ends of the water through hole are connected to a pipeline, and the mounting hole is connected to the water through hole; A double gate plate movably disposed in the mounting hole, the double gate plate includes a double gate plate body and a first pushing member, one side of the double gate plate body close to the water inlet of the water through hole has a first pushing hole, and the first pushing member is movably disposed in the first pushing hole; and A control part located in the mounting hole and extending to the external space; one end of the control member is connected to the double gate plate, and the other end is detachably disposed on the gate valve body; the control part has a conversion space, the control part includes a conversion structure, the conversion structure is disposed in the conversion space, and one end of the conversion structure is connected to one end of the first pushing member; Wherein, the control part is used to push the double gate plate to move at a first speed to close the water through hole; the control part is also used to push the double gate plate to move at a second speed until a part of the first pushing member is located in the water through hole, so as to generate a water hammer phenomenon in the pipeline, and then drive the conversion structure through the first pushing member, so that the control part disconnects from the gate valve body, and finally quickly closes the water through hole by pushing the control part The above technical solutions in the embodiments of the present application have at least the following technical effects: The double-gate flat gate valve provided by the embodiment of the present application includes a gate valve body having a water passage hole and a mounting hole, a double gate movably disposed, and a control portion located in the mounting hole. By providing the control portion, the moving speed of the double gate is controlled. When the double gate moves at a first speed, the control portion always moves at the first speed until the water passage is closed. When the double gate moves at a second speed, a water hammer phenomenon occurs in the water passage hole. The water hammer phenomenon disconnects the connection between the control portion and the gate valve body through a first pushing member, so that the double gate can be directly pushed towards the water passage hole by manpower, and thus the water passage hole can be quickly closed. Compared with the scheme directly controlled by a motor, the mechanical structure is more stable than the electric structure and is not easily damaged. Moreover, there may be some flammable and explosive liquids in the pipeline to which the double-gate flat gate valve is applied, and the damage of the electric structure may cause fires and explosions. Compared with the scheme of directly providing two sets of independent control structures, the above scheme can utilize the water hammer phenomenon to switch the control mode. When using the water hammer phenomenon to switch the control mode, the first pushing member will move towards the control portion, and thus a certain space will be provided to alleviate the harm of the water hammer phenomenon to the gate valve body.

[0006] In some embodiments, the double gate includes an internal threaded hole, and the control portion includes: a transmission member located in the mounting hole and extending to the external space; the transmission member includes a smooth rod portion and an external threaded portion, the external threaded portion is located at one end of the transmission member in the mounting hole, and the external threaded portion is always located in the mounting hole; a part of the smooth rod portion is located in the external space, and another part is located in the mounting hole, and one end of the smooth rod portion located in the external space is detachably disposed on the gate valve body; the external thread of the external threaded portion is adapted to the internal thread of the internal threaded hole, and the external threaded portion is disposed in the internal threaded hole; and a speed control member disposed at one end of the smooth rod portion located in the external space; wherein, the speed control member is used to control the double gate to move at a first speed to close the water passage hole through the transmission member; the speed control member is also used to control the double gate to move at a second speed to a position where a part of the first pushing member is located in the water passage hole through the transmission member.

[0007] In some embodiments, the gate valve body has a rotatable fixed end, and one end of the smooth rod portion located in the external space is detachably disposed on the fixed end.

[0008] In some embodiments, a locking mounting hole is provided on one side of the transmission member close to the fixed end, and a locking mating hole is provided on the fixed end. The control portion further includes: A locking member, movably disposed within the locking mounting hole, the locking member being capable of moving into the locking engagement hole; and An elastic element, located within the locking mounting hole, one end of the elastic element being connected to the inner bottom wall of the locking mounting hole, the other end of the elastic element being connected to the side wall of the locking member facing the inner bottom wall of the locking mounting hole; the elastic element is configured to drive the locking member into the locking engagement hole so as to fix the transmission member to the fixed end.

[0009] In some embodiments, the transmission member is provided with a conversion through-hole, and the conversion structure includes: A conversion member, movably disposed within the conversion through-hole; and A first connecting member, located between the double gate plates, one end of the first connecting member being hinged to the conversion member, the other end of the first connecting member being hinged to the first pushing member; Wherein, the first pushing member is configured to push the conversion member towards the fixed end through the first connecting member, so that the conversion member abuts against the locking member, and further causes the locking member to retract into the locking mounting hole, thereby disconnecting the connection between the transmission member and the fixed end.

[0010] In some embodiments, the speed control member includes: A first gear, rotatably disposed on the gate valve body; A second gear, rotatably disposed at one end of the transmission member facing the fixed end, and the second gear meshes with the first gear; A first rotating member, disposed on one side of the first gear facing the fixed end; and A second rotating member, disposed on the transmission member.

[0011] In some embodiments, the double gate plates are provided with a second pushing hole at the water outlet of the water passing through-hole, and the double gate plates further include a second pushing member, the second pushing member being movably disposed within the second pushing hole; the conversion structure further includes a second connecting member, one end of the second connecting member being hinged to the conversion member, the other end of the second connecting member being hinged to the second pushing member; Wherein, in the case where the double gate plates quickly close the water passing through-hole, a water hammer phenomenon occurs downstream of the pipeline, so that the second pushing member moves towards the water outlet of the water passing through-hole, and further drives the conversion member to be able to disengage from the locking member, so that the locking member can partially extend out of the locking mounting hole.

[0012] In some embodiments, one side of the locking member facing the fixed end and the side facing away from the fixed end are provided as inclined surfaces, so that the locking member can smoothly move into or out of the locking engagement hole.

[0013] In some embodiments, the gate plate further includes a first sealing ring and a second sealing ring. The first sealing ring is disposed between the double gate plate and the first pushing member, and the second sealing ring is disposed between the double gate plate and the second pushing member.

[0014] In some embodiments, one side of the conversion member facing the locking member is provided as an inclined surface, so that the conversion member can push the locking member to retract into the locking mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a three-dimensional structural schematic diagram of a double-gate plate flat gate valve provided by an embodiment of the present application; Figure 2 is a top-view structural schematic diagram of a double-gate plate flat gate valve provided by an embodiment of the present application; Figure 3 is Figure 2 a cross-sectional structure diagram in the A-A direction in Figure 4 is Figure 3 a partial enlarged view at B in

[0017] Among them, the reference numerals in the drawings are as follows: 100, double-gate plate flat gate valve; 10, gate valve body; 101, mounting hole; 102, water passing through hole; 11, fixed end; 110, locking engagement hole; 20, double gate plate; 200, internal thread hole; 21, double gate plate body; 210, first pushing hole; 211, second pushing hole; 22, first pushing member; 23, first sealing ring; 24, second sealing ring; 25, second pushing member; 30. Control unit; 300. Conversion space; 31. Conversion structure; 311. Conversion part; 312. First connecting part; 32. Transmission part; 320. Conversion through-hole; 321. Optical rod part; 322. External thread part; 323. Stopping and mounting hole; 33. Speed control part; 331. First rotating part; 332. Second rotating part; 333. First gear; 334. Second gear; 34. Stopping part; 35. Elastic element; 36. Second connecting part. Detailed implementation manners

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further describes this application in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and do not limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0020] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0023] In this application, "and / or" is merely a correlative relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, both A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally represents an "or" relationship between the associated objects before and after.

[0024] It should be noted that in this application, words such as "in some embodiments", "exemplarily", and "for example" are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "in some embodiments", "exemplarily", or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Precisely, the use of words such as "in some embodiments", "exemplarily", and "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in conjunction with the embodiments can be included in at least one embodiment of this application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] The double-gate flat gate valve is a high-performance valve, widely used in occasions that require high sealing performance, high pressure resistance, and corrosion resistance; it is mainly used to open or close pipelines.

[0026] In some emergency situations of the double-gate flat gate valve in the related art, the pipeline needs to be quickly closed. However, the existing double-gate flat gate valve controls the closing of the pipeline through the cooperation of internal and external threads, and the above control method is too slow; and water hammer phenomenon will also occur when quickly closing the pipeline, resulting in damage to the pipeline.

[0027] Based on this, to improve the problems in the related art that the pipeline cannot be quickly closed and the damage to the pipeline caused by the water hammer phenomenon cannot be reduced when quickly closing the pipeline, the embodiments of this application provide the following solutions.

[0028] Please refer to Figure 1 and Figure 2 , the embodiments of this application provide a double-gate flat gate valve 100, and the double-gate flat gate valve 100 includes a gate valve body 10, a double gate 20, and a control unit 30; where: The gate valve body 10 has a water passing through hole 102 and a mounting hole 101. Both ends of the water passing through hole 102 are connected to the pipeline, and the mounting hole 101 is connected to the water passing through hole 102.

[0029] The double gate plate 20 is movably arranged in the mounting hole 101. The double gate plate 20 includes a double gate plate main body 21 and a first pushing member 22. One side of the double gate plate main body 21 close to the water inlet of the water passing through hole 102 has a first pushing hole 210, and the first pushing member 22 is movably arranged in the first pushing hole 210.

[0030] The control part 30 is located in the mounting hole 101 and extends to the external space; one end of the control part 30 is connected to the double gate plate 20, and the other end is detachably arranged on the gate valve main body 10; the control part 30 has a conversion space 300, the control part 30 includes a conversion structure 31, the conversion structure 31 is arranged in the conversion space 300, and one end of the conversion structure 31 is connected to one end of the first pushing member 22.

[0031] Wherein, the control part 30 is used to push the double gate plate 20 to move to close the water passing through hole 102 at a first speed; the control part 30 is also used to push the double gate plate 20 to move to a position where a part of the first pushing member 22 is located in the water passing through hole 102 at a second speed, so as to generate a water hammer phenomenon in the pipeline, and then drive the conversion structure 31 through the first pushing member 22, so that the control part 30 disconnects the connection with the gate valve main body 10, and finally quickly closes the water passing through hole 102 by pushing the control part 30.

[0032] It can be understood that the gate valve main body 10 is a component for connecting the two ends of the pipeline; for example, the gate valve main body 10 can be a metal part similar to a tee or a metal part with three interconnected openings, etc. The double gate plate 20 is a component for opening or closing; for example, the double gate plate 20 can be a metal plate or a metal housing, etc. The control part 30 is a component for pushing the double gate plate 20 to move; for example, the control part 30 can be a linear motor, and the power output end of the linear motor is connected to the double gate plate 20. The first pushing member 22 is a component for transmitting power to the control part 30; for example, the first pushing member 22 can be a cylindrical plate or a square plate, etc. The first speed is the speed at which the double gate plate 20 closes the water passing through hole 102 without generating a water hammer phenomenon. The second speed is the speed at which the double gate plate 20 closes the water passing through hole 102 and generates a water hammer phenomenon; and the second speed is greater than the first speed.

[0033] As can be seen from the above, the double-gate flat gate valve 100 provided by the embodiments of the present application includes a gate valve body 10 having a water through-hole 102 and a mounting hole 101, a double gate 20 movably disposed, and a control part 30 located in the mounting hole 101. By providing the control part 30, the control part 30 is used to control the moving speed of the double gate 20. When the double gate 20 moves at a first speed, the control part 30 always moves at the first speed until the water through-hole 102 is closed. When the double gate 20 moves at a second speed, a water hammer phenomenon occurs in the water through-hole 102. The water hammer phenomenon disconnects the connection between the control part 30 and the gate valve body 10 through a first pushing member 22, so that the human force can directly push the double gate 20 towards the water through-hole 102, and thus the water through-hole 102 can be quickly closed. Compared with the solution directly controlled by a motor, the mechanical structure is more stable than the electric structure and is not easily damaged. Moreover, there may be some flammable and explosive liquids in the pipeline to which the double-gate flat gate valve 100 is applied, and the damage of the electric structure may cause fires and explosions. Compared with the solution of directly providing two sets of independent control structures, the above solution can utilize the water hammer phenomenon to switch the control mode. When using the water hammer phenomenon to switch the control mode, the first pushing member 22 will move towards the control part 30, and thus a certain space will be provided to alleviate the harm of the water hammer phenomenon to the gate valve body 10.

[0034] In some embodiments, please refer to Figure 3 and Figure 4 , the double gate 20 includes an internal thread hole 200, and the control part 30 includes a transmission member 32 and a speed control member 33; wherein: The transmission member 32 is located in the mounting hole 101 and extends to the external space. The transmission member 32 includes a smooth rod portion 321 and an external thread portion 322. The external thread portion 322 is located at one end of the transmission member 32 in the mounting hole 101, and the external thread portion 322 is always located in the mounting hole 101. A part of the smooth rod portion 321 is located in the external space, and another part is located in the mounting hole 101. One end of the smooth rod portion 321 located in the external space is detachably disposed on the gate valve body 10. The external thread of the external thread portion 322 is adapted to the internal thread of the internal thread hole 200, and the external thread portion 322 is disposed in the internal thread hole 200.

[0035] The speed control member 33 is disposed at one end of the smooth rod portion 321 located in the external space.

[0036] Wherein, the speed control member 33 is used to control the double gate 20 to move to close the water through-hole 102 at a first speed through the transmission member 32; the speed control member 33 is further used to control the double gate 20 to move to a position where a part of the first pushing member 22 is located in the water through-hole 102 at a second speed through the transmission member 32.

[0037] It can be understood that the transmission member 32 is a device for driving the double gate 20 to move; for example, the transmission member 32 can be an external threaded rod or a straight rod, etc. The smooth rod portion 321 is the portion for abutting against the mounting hole 101; the threaded portion is the portion for cooperating with the internal threaded hole 200. The speed control member 33 is a component for helping the worker to control the moving speed of the double gate.

[0038] With such an arrangement, by the worker operating the speed control member 33 and controlling the double gate 20 to move towards the water passing through hole 102 at the first speed through the transmission member 32, so that the worker can rotate to enable the double gate 20 to always move to close the water passing through hole 102 at the first speed; by the worker operating the speed control member 33 and controlling the double gate 20 to move towards the water passing through hole 102 at the second speed, so that a water hammer phenomenon is generated in the pipeline, and when a part of the first pusher 22 is located in the water passing through hole 102, the impact force of the fluid pushes the first pusher 22 towards the control part 30, and further enables the worker to quickly close the water passing through hole 102 by directly pressing the speed control member 33. Compared with the scheme of directly closing the water passing through hole 102 quickly, in the above scheme, because the first pusher 22 can have a certain moving distance, the above structure can reduce the damage of the water hammer phenomenon to the pipeline. By dividing the transmission member 32 into two parts, namely the smooth rod portion 321 and the external thread portion 322, so that the control part 30 can switch the control mode. In the case where no water hammer phenomenon occurs, the transmission member 32 controls the movement of the double gate 20 through the relative movement between the external thread portion 322 and the double gate 20; the above control mode can accurately control the opening degree of the water passing through hole 102; in the case where a water hammer phenomenon occurs, the transmission member 32 controls the movement of the double gate 20 through the relative movement between the smooth rod portion 321 and the mounting hole 101; the above scheme can reduce the control stroke to quickly close the water passing through hole 102.

[0039] Optionally, in some embodiments, please refer to Figures 1 to 4 , the gate valve body 10 has a rotatable fixed end 11, and one end of the smooth rod portion 321 located in the external space is detachably arranged on the fixed end 11.

[0040] It can be understood that the fixed end 11 is a component for fixing the control part 30 to the gate valve body 10; for example, the fixed end 11 can be a cylindrical shell or a cuboid shell, etc.

[0041] With such an arrangement, when controlling the double gate 20 by rotating the speed control member 33, one end of the smooth rod portion 321 located in the external space is connected to the fixed end 11; when controlling the double gate 20 by moving the speed control member 33, the connection relationship between one end of the smooth rod portion 321 located in the external space and the fixed end 11 is disconnected. The above structure enables the fixed end 11 to adapt to different control modes.

[0042] Optionally, please refer to Figures 1 to 4 , on one side of the transmission member 32 close to the fixed end 11, there is a locking mounting hole 323, the fixed end 11 has a locking mating hole 110, and the control part 30 further includes a locking member 34 and an elastic element 35; wherein: The locking member 34 is movably arranged in the locking mounting hole 323, and the locking member 34 can move into the locking mating hole 110.

[0043] The elastic element 35 is located in the locking mounting hole 323. One end of the elastic element 35 is connected to the inner bottom wall of the locking mounting hole 323, and the other end of the elastic element 35 is connected to the side wall of the locking member 34 facing the inner bottom wall of the locking mounting hole 323; the elastic element 35 is used to drive the locking member 34 into the locking mating hole 110 so as to fix the transmission member 32 to the fixed end 11.

[0044] It can be understood that the locking member 34 is a component for connecting the fixed end 11 and the control part 30; for example, the locking member 34 can be a metal rod or a metal block, etc. The elastic element 35 is a component for moving the locking member 34 into the locking mating hole 110; for example, the elastic element 35 can be a spring or a rubber elastomer, etc.

[0045] With such a setting, by setting the elastic element 35 to push the locking member 34 to partially move into the locking mating hole 110, the fixed end 11 is connected to the control part 30; by the conversion structure 31 to push the locking member 34 out of the control part 30, the connection between the fixed end 11 and the control part 30 is disconnected; compared with the scheme of directly controlling the connecting rod by a motor, the above scheme is not easy to be damaged, and the liquid in the pipeline may be flammable and explosive, and there may be certain safety hazards for the motor. The above scheme can reduce the relevant safety hazards.

[0046] Exemplarily, please refer to Figures 1 to 4 , the transmission member 32 is provided with a conversion through hole 320, and the conversion structure 31 includes a conversion member 311 and a first connecting member 312; wherein: The conversion member 311 is movably arranged in the conversion through hole 320.

[0047] The first connecting member 312 is located between the double gate plates 20. One end of the first connecting member 312 is hinged to the conversion member 311, and the other end of the first connecting member 312 is hinged to the first pushing member 22.

[0048] Wherein, the first pushing member 22 is used to push the conversion member 311 towards the fixed end 11 through the first connecting member 312, so that the conversion member 311 abuts against the locking member 34, and then the locking member 34 retracts into the locking mounting hole 323, thereby disconnecting the connection between the transmission member 32 and the fixed end 11.

[0049] It can be understood that the conversion member 311 is a member for pushing the locking member 34 to move out of the locking mating hole 110; for example, the conversion member 311 can be a cylindrical rod or a cylindrical housing, etc. The first connecting member 312 is a member for pushing the conversion member 311; for example, the first connecting member 312 can be a cylindrical rod or a cylindrical housing, etc.

[0050] With such a setting, due to the water hammer phenomenon, the first pushing member 22 pushes the conversion member 311 through the first connecting member 312 to move until it abuts against the locking member 34, so that the locking member 34 can move out of the locking mating hole 110, thereby disconnecting the connection between the fixed end 11 and the control part 30; the above solution can control whether the control part 30 is connected to the fixed end 11 according to whether a water hammer phenomenon occurs in the pipeline.

[0051] In some embodiments, please refer to Figures 1 to 3 , the speed control member 33 includes a first gear 333, a second gear 334, a first rotating member 331 and a second rotating member 332; where: The first gear 333 is rotatably arranged on the gate valve body 10.

[0052] The second gear 334 is rotatably arranged at one end of the transmission member 32 facing the fixed end 11, and the second gear 334 meshes with the first gear 333.

[0053] The first rotating member 331 is arranged on the side of the first gear 333 facing the fixed end 11.

[0054] The second rotating member 332 is arranged on the transmission member 32.

[0055] It can be understood that the first rotating member 331 is a member for transmitting the force of the worker to the first gear 333; for example, the first rotating member 331 can be a cylindrical metal rod or a rectangular parallelepiped metal housing, etc. The second rotating member 332 is a member for transmitting the force of the worker to the transmission member 32; for example, the second rotating member 332 can be a cylindrical metal rod or a rectangular parallelepiped metal housing, etc.

[0056] With such a setting, the worker rotates the transmission member 32 through the second rotating member 332 so that the double gate 20 closes the pipeline at a first speed; the worker rotates the first gear 333 through the first rotating member 331 and amplifies it through the second gear 334 so that the double gate 20 closes the pipeline at a second speed, thereby switching the control mode, and then completes the subsequent closing process by pushing the second rotating member 332. The above solution is convenient for disassembly and can reduce the manufacturing cost of the device.

[0057] Optionally, in some embodiments, please refer to Figures 1 to 4, a second pushing hole 211 is formed in the double gate plate 20 facing the water outlet of the water passing through hole 102. The double gate plate 20 further includes a second pushing member 25 which is movably disposed in the second pushing hole 211; the conversion structure 31 further includes a second connecting member 36, one end of the second connecting member 36 is hinged to the conversion member 311, and the other end of the second connecting member 36 is hinged to the second pushing member 25; Wherein, when the double gate plate 20 quickly closes the water passing through hole 102, a water hammer phenomenon occurs in the downstream of the pipeline, so that the second pushing member 25 moves towards the water outlet of the water passing through hole 102, and further drives the conversion member 311 to be able to disengage from the locking member 34, so that the locking member 34 can partially extend out of the locking installation hole 323.

[0058] It can be understood that the second pushing member 25 is a member for driving the second connecting member 36 to move; for example, the second pushing member 25 can be a cylindrical plate or a square plate, etc. The second connecting member 36 is a member for driving the conversion member 311 to move; for example, the second connecting member 36 can be a cylindrical rod or a cylindrical shell, etc.

[0059] With such a setting, when a water hammer phenomenon occurs in the downstream of the pipeline, by providing the second pushing member 25 and the second connecting member 36, the water hammer phenomenon can push the conversion member 311 to move away from the fixed end 11 through the second pushing member 25 and the second connecting member 36, and further the conversion member 311 disengages from the locking member 34, so that the locking member 34 can extend out of the locking installation hole 323 under the action of the restoring force of the elastic element 35. The above solution can reduce the impact of the water hammer phenomenon on the pipeline and is beneficial to subsequently connecting the conversion member 311 to the fixed end 11.

[0060] Optionally, please refer to Figures 1 to 4 , the side of the locking member 34 facing the fixed end 11 and the side facing away from the fixed end 11 are provided as inclined surfaces, so that the locking member 34 can smoothly move into or out of the locking cooperation hole 110.

[0061] With such a setting, by providing the side of the locking member 34 facing the fixed end 11 and the side facing away from the fixed end 11 as inclined surfaces, it helps the conversion member 311 to be able to make the locking member 34 smoothly move into or out of the locking cooperation hole 110 through abutment.

[0062] In some embodiments, please refer to Figures 1 to 4 , the double gate plate 20 further includes a first sealing ring 23 and a second sealing ring 24. The first sealing ring 23 is disposed between the double gate plate 20 and the first pushing member 22, and the second sealing ring 24 is disposed between the double gate plate and the second pushing member 25.

[0063] It can be understood that the first sealing ring 23 is a component for isolating the first pushing hole 210 from the internal space of the pipeline. The second sealing ring 24 is a component for isolating the second pushing hole 211 from the internal space of the pipeline.

[0064] With such a setting, by providing the first sealing ring 23 to isolate the first pushing hole 210 from the internal space of the pipeline and providing the second sealing ring 24 to isolate the second pushing hole 211 from the internal space of the pipeline, it is thereby possible to prevent the liquid in the pipeline from entering the first pushing hole 210 and the second pushing hole 211, and further keep the pressure in the first pushing hole 210 and the second pushing hole 211 unchanged, so that the water hammer phenomenon can push the first pushing member 22 and the second pushing member 25.

[0065] In some embodiments, please refer to Figure 4 , one side of the conversion member 311 facing the locking member 34 is provided as an inclined surface, so that the conversion member 311 can push the locking member 34 to retract into the locking mounting hole 323.

[0066] With such a setting, by providing one side of the conversion member 311 facing the locking member 34 as an inclined surface, the widths on both sides of the inclined surface of the conversion member 311 are different, and thus the conversion member 311 can push the locking member 34 to retract into the locking mounting hole 323.

[0067] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A double gate flat gate valve, characterized in that, Comprising: A gate valve body having a water passage hole and a mounting hole. Both ends of the water passage hole are communicated with a pipeline, and the mounting hole is communicated with the water passage hole; A double gate plate movably disposed in the mounting hole. The double gate plate includes a double gate plate body and a first pushing member. One side of the double gate plate body close to the water inlet of the water passage hole has a first pushing hole, and the first pushing member is movably disposed in the first pushing hole; and A control part located in the mounting hole and extending to the external space. One end of the control part is connected to the double gate plate, and the other end is detachably disposed on the gate valve body; The control part has a conversion space. The control part includes a conversion structure disposed in the conversion space, and one end of the conversion structure is connected to one end of the first pushing member; Wherein, the control part is used to push the double gate plate to move at a first speed to close the water passage hole; the control part is also used to push the double gate plate to move at a second speed to make a part of the first pushing member located in the water passage hole, so as to generate a water hammer phenomenon in the pipeline, and then drive the conversion structure through the first pushing member, so that the control part disconnects from the gate valve body, and finally quickly closes the water passage hole by pushing the control part.

2. The double-gate flat gate valve according to claim 1, characterized in that, The double gate plate includes an internal thread hole, and the control part includes: A transmission member located in the mounting hole and extending to the external space. The transmission member includes a smooth rod part and an external thread part. The external thread part is located at one end of the transmission member in the mounting hole, and the external thread part is always located in the mounting hole. A part of the smooth rod part is located in the external space, and another part is located in the mounting hole. One end of the smooth rod part located in the external space is detachably disposed on the gate valve body. The external thread of the external thread part is adapted to the internal thread of the internal thread hole, and the external thread part is disposed in the internal thread hole; and A speed control member disposed at one end of the smooth rod part located in the external space; Wherein, the speed control member is used to control the double gate plate to move at a first speed to close the water passage hole through the transmission member; the speed control member is also used to control the double gate plate to move at a second speed to make a part of the first pushing member located in the water passage hole through the transmission member.

3. The double-gate flat gate valve according to claim 2, wherein: The gate valve body has a rotatable fixed end, and one end of the smooth rod part located in the external space is detachably disposed on the fixed end.

4. The double-gate flat gate valve according to claim 3, wherein, One side of the transmission member close to the fixed end has a locking mounting hole, and the fixed end has a locking mating hole. The control part further includes: A locking member movably disposed in the locking mounting hole, and the locking member can move into the locking mating hole; and An elastic element located in the locking mounting hole. One end of the elastic element is connected to the inner bottom wall of the locking mounting hole, and the other end of the elastic element is connected to the side wall of the locking member facing the inner bottom wall of the locking mounting hole. The elastic element is used to drive the locking member into the locking mating hole to fix the transmission member to the fixed end.

5. The double-gate flat gate valve according to claim 4, characterized in that, The transmission member is provided with a conversion through hole, and the conversion structure includes: A conversion member, movably disposed within the conversion through-hole; and A first connecting member, located between the double gate plates, one end of the first connecting member being hinged to the conversion member, and the other end of the first connecting member being hinged to the first pushing member; Wherein, the first pushing member is configured to push the conversion member towards the fixed end through the first connecting member, so that the conversion member abuts against the locking member, thereby causing the locking member to retract into the locking mounting hole, and thus disconnecting the transmission member from the fixed end.

6. The double-gate flat gate valve according to claim 3, characterized in that, The speed control member includes: A first gear, rotatably disposed on the gate valve body; A second gear, rotatably disposed at one end of the transmission member facing the fixed end, and the second gear meshing with the first gear; A first rotating member, disposed on a side of the first gear facing the fixed end; and A second rotating member, disposed on the transmission member.

7. The double-gate flat gate valve according to claim 5, wherein: The double gate plates are provided with a second pushing hole facing the water outlet of the water through-hole, and the double gate plates further include a second pushing member, the second pushing member being movably disposed within the second pushing hole; the conversion structure further includes a second connecting member, one end of the second connecting member being hinged to the conversion member, and the other end of the second connecting member being hinged to the second pushing member; Wherein, when the double gate plates quickly close the water through-hole, a water hammer phenomenon occurs downstream of the pipeline, causing the second pushing member to move towards the water outlet of the water through-hole, and further driving the conversion member to be able to disengage from the locking member, so that the locking member can partially protrude from the locking mounting hole.

8. The double-gate flat gate valve according to claim 4, characterized in that: One side of the locking member facing the fixed end and the side facing away from the fixed end are provided as inclined surfaces, so that the locking member can smoothly move into or out of the locking engagement hole.

9. The double-gate flat gate valve according to claim 7, characterized in that: The gate plate further includes a first sealing ring and a second sealing ring, the first sealing ring being disposed between the double gate plates and the first pushing member, and the second sealing ring being disposed between the double gate plates and the second pushing member.

10. The double-gate flat gate valve according to claim 7, characterized in that: One side of the conversion member facing the locking member is provided as an inclined surface, so that the conversion member can push the locking member to retract into the locking mounting hole.

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