Pressure relief gate valve
By setting pressure relief channels and connecting components on the valve body, the pressure fluctuation problem during the opening and closing of the gate valve is solved, enabling easy opening and closing and preventing water hammer, thus improving the performance of the gate valve.
Patent Information
- Application Number
- CN202520819476.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-27
AI Technical Summary
The existing gate valves experience pressure fluctuations due to changes in fluid velocity during opening and closing, making them difficult to open and close. In particular, they require a large torque at the moment of opening and closing, and water hammer occurs.
A pressure relief channel is opened on the valve body and a connecting component is installed. By cooperating with the gate and the connecting component, the pressure relief channel can be connected or disconnected to relieve fluid pressure, slow down the change in flow velocity, and prevent water hammer.
This enables easy opening and closing of the gate valve, avoiding difficulties in opening and closing and water hammer, and improving the opening and closing efficiency and sealing performance of the gate valve.
Smart Images
Figure CN223923876U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field especially is concerned with a pressure relief gate valve. BACKGROUND
[0002] The opening and closing part of the gate valve is the gate plate, the movement direction of the gate plate is perpendicular to the fluid direction, the gate valve can only be fully opened and closed, and cannot be adjusted and throttled, the gate plate has two sealing surfaces, when the gate valve is closed, the sealing surfaces can be sealed only by relying on the medium pressure, that is, only by relying on the medium pressure to press the sealing surface of the gate plate to the valve seat on the other side to ensure the sealing of the sealing surface, most of the gate valves use forced sealing, that is, when the valve is closed, external force is relied on to forcibly press the gate plate to the valve seat to ensure the sealing of the sealing surface.
[0003] When the gate valve is opened and closed, the flow rate of the fluid changes sharply, which can generate pressure waves and further cause pressure increase, so the gate valve of the prior art has the problem of difficult opening and closing, and a large torque is required to complete the opening and closing operation, especially at the moment of opening the gate plate and the moment of completely closing the gate plate, a gate valve capable of relieving pressure needs to be provided. CONTENT OF THE UTILITY MODEL
[0004] The utility model discloses a pressure relief gate valve, the utility model discloses a pressure relief channel is set up on the valve body, and still is provided with the intercommunication component that cooperates with the gate plate, and the pressure relief channel is communicated or cut off through the intercommunication component, when the pressure relief channel is communicated, can effectively relieve pressure, reach the effect that opens and closes easily.
[0005] The technical scheme adopted by the utility model is as follows: a pressure relief gate valve, comprising a valve body, a valve cover, a gate plate, a valve stem and an actuator, the valve body is internally provided with a flow channel, the gate plate is arranged in the valve body and is used for communicating or blocking the flow channel, the valve cover is connected with the valve body, one end of the valve stem penetrates through the valve cover and is connected with the actuator, and the other end is connected with the gate plate, a pressure relief channel is formed in the valve body, and the valve body is further provided with an intercommunication component installed thereon, the gate plate is matched with the intercommunication component to communicate or cut off the pressure relief channel, when the gate plate is opened, the intercommunication component communicates the pressure relief channel, and when the gate plate is closed, the intercommunication component cuts off the pressure relief channel.
[0006] The flow channel is divided into an inlet and an outlet through the gate plate, one end of the pressure relief channel communicates with the inlet, and the other end communicates with the outlet, an installation cavity for installing the intercommunication component is formed in the side position of the valve body corresponding to the pressure relief channel, the intercommunication component comprises a sliding block, the sliding block is slidably arranged in the installation cavity, a flow passage matched with the pressure relief channel is formed in the sliding block, when the gate plate is opened, the flow passage communicates with the pressure relief channel, and when the gate plate is closed, the flow passage is disconnected with the pressure relief channel.
[0007] The valve body is further provided with a closed cavity communicated with the installation cavity, the communication assembly further comprises an elastic member and a locking member, the locking member is threadedly connected with one end of the installation cavity away from the closed cavity, one end of the elastic member is abutted against the locking member and the other end is abutted against the sliding block, when the gate is closed, the gate extends into the closed cavity and drives the sliding block to move to disconnect the over-flow passage and the pressure relief passage, when the gate is opened, the elastic member drives the sliding block to move to connect the over-flow passage and the pressure relief passage.
[0008] An end of the sliding block close to the closed cavity is provided with an inverted bevel.
[0009] The pressure relief passage is V-shaped, the pressure relief passage comprises a first passage communicated with an inlet, a second passage communicated with an outlet and a third passage between the first passage and the second passage.
[0010] The communication assembly is provided with two groups, and the two groups of communication assemblies are arranged at positions corresponding to one side of the first passage and one side of the second passage respectively.
[0011] Inner walls of the installation cavity are provided with a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are oppositely arranged at two sides of the pressure relief passage.
[0012] The valve body is further rotationally connected with a discharge member, an axis of the discharge member is eccentrically arranged with respect to an axis of the valve body, the discharge member is provided with a discharge hole, and the discharge member has a first state and a second state by rotation, when the discharge member is rotated to the first state, the discharge hole is communicated with the pressure relief passage and an outside of the valve body, and when the discharge member is rotated to the second state, the discharge hole is disconnected with the pressure relief passage.
[0013] The valve body is further threadedly connected with a locking sleeve, the discharge member is limitingly arranged on the valve body through the locking sleeve, the discharge member penetrates through the locking sleeve, an end face of the discharge member close to the discharge hole is provided with a handle, and an end face of the valve body is provided with an indicating mark, when the discharge member is rotated to the handle pointing to the indicating mark, the discharge member is in the first state.
[0014] An end face of the discharge member close to the pressure relief passage is provided with a third sealing ring, and the third sealing ring surrounds the discharge hole.
[0015] The utility model discloses a valve body is provided with a pressure relief passage, through the pressure relief passage slows down the flow rate of fluid, and still be provided with the communication assembly that cooperates with the gate, through the communication assembly connects or cuts off the pressure relief passage, when connecting the pressure relief passage, can effectively relieve pressure, reaches the effect that opens and closes easily, prevents the generation of water hammer phenomenon, when the gate is closed, will cut off the pressure relief passage and avoid causing leakage, still has good linkage. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0017] Figure 1 It is a structural schematic diagram of the pressure relief gate valve of the present application.
[0018] Figure 2 It is Figure 1 It is a local enlarged schematic diagram of A in the middle.
[0019] Figure 3 It is a structural schematic diagram when the gate plate is opened in the present application.
[0020] Figure 4 It is a bottom view schematic diagram of the present application.
[0021] Figure 5 It is a structural schematic diagram of the combination of the discharge member and the locking sleeve in the present application.
[0022] In the figure, 1-valve body, 2-valve cover, 3-gate plate, 4-valve rod, 5-actuating mechanism, 6-inlet, 7-outlet, 8-mounting cavity, 9-sliding block, 10-flow passage, 11-closing cavity, 12-elastic member, 13-locking member, 14-inverted bevel, 15-first passage, 16-second passage, 17-third passage, 18-first sealing ring, 19-second sealing ring, 20-discharge member, 21-discharge hole, 22-locking sleeve, 23-handle, 24-indication mark, 25-third sealing ring, 26-pressure relief passage, 27-communication assembly. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further describe the present application in combination with the drawings.
[0024] It should be noted that all the expressions of "first" and "second" in the embodiments of the present application are used to distinguish two same name but different entities or different parameters, and it can be seen that "first" and "second" are only for the convenience of description, and should not be understood as the limitation of the embodiments of the present application, and the subsequent embodiments will not be described one by one.
[0025] The directions and positions mentioned in the utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "top", "bottom", "side" and the like, are only the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the utility model, and are not a limitation on the protection scope of the utility model.
[0026] As shown in Figures 1 to 5 A pressure relief gate valve, comprising a valve body 1, a valve cover 2, a gate plate 3, a valve rod 4 and an actuator 5, the valve body 1 is internally provided with a flow passage, the gate plate 3 is arranged in the valve body 1 for communicating or blocking the flow passage, the valve cover 2 is connected with the valve body 1, one end of the valve rod 4 penetrates through the valve cover 2 and is connected with the actuator 5 and the other end is connected with the gate plate 3, a pressure relief passage 26 is formed on the valve body 1, and a communication assembly 27 is installed on the valve body 1, the gate plate 3 cooperates with the communication assembly 27 to communicate or cut off the pressure relief passage 26, when the gate plate 3 is opened, the communication assembly 27 communicates the pressure relief passage 26, and when the gate plate 3 is closed, the communication assembly 27 cuts off the pressure relief passage 26.
[0027] The beneficial effects of such arrangement are as follows, the utility model opens the pressure relief passage on the valve body, slows down the flow rate of the fluid through the pressure relief passage, and further provides the communication assembly cooperating with the gate plate, communicates or cuts off the pressure relief passage through the communication assembly, effectively relieves pressure when the pressure relief passage is communicated, achieves the effect of easy opening and closing, prevents the generation of water hammer phenomenon, cuts off the pressure relief passage when the gate plate is closed to avoid leakage, and has good linkage.
[0028] Further arrangement, the flow passage is divided into an inlet 6 and an outlet 7 through the gate plate 3, one end of the pressure relief passage 26 communicates with the inlet 6 and the other end communicates with the outlet 7, an installation cavity 8 for installing the communication assembly 27 is formed on the side of the valve body 1 corresponding to the position of the pressure relief passage 26, the communication assembly 27 comprises a sliding block 9, the sliding block 9 is slidingly arranged in the installation cavity 8, and a flow passage 10 adapted to the pressure relief passage 26 is formed on the sliding block 9, when the gate plate 3 is opened, the flow passage 10 communicates with the pressure relief passage 26, and when the gate plate 3 is closed, the flow passage 10 is disconnected from the pressure relief passage 26.
[0029] The beneficial effects of such arrangement are as follows, when the gate plate is opened, the fluid of the inlet is first introduced to the outlet through the pressure relief passage, the pressure of the inlet is reduced, and when the gate plate is opened, the sliding block slides to the position where the flow passage and the pressure relief passage are through to achieve pressure relief, and when the gate plate is closed, the sliding block slides to the position where the flow passage and the pressure relief passage are misaligned, the end surface of the sliding block blocks the pressure relief passage to achieve disconnection of the pressure relief passage.
[0030] Further, the valve body 1 is further provided with a closed cavity 11 communicated with the installation cavity 8, the communication assembly 27 further comprises an elastic member 12 and a locking member 13, the locking member 13 is threadedly connected with the end of the installation cavity 8 away from the closed cavity 11, the elastic member 12 is abutted with the locking member 13 at one end and abutted with the sliding block 9 at the other end, when the shutter 3 is closed, the shutter 3 extends into the closed cavity 11 and drives the sliding block 9 to move to disconnect the overcurrent passage 10 and the pressure relief passage 26, when the shutter 3 is opened, the elastic member 12 drives the sliding block 9 to move to connect the overcurrent passage 10 and the pressure relief passage 26.
[0031] The beneficial effects of such an arrangement are as follows: the elastic member drives the sliding block to slide towards the shutter direction, and the sliding block can keep the pressure relief passage open when the shutter is about to be completely closed, ensuring that the shutter can be relieved when it is closed. The detachable locking member ensures quick disassembly and assembly of the communication assembly, facilitating maintenance.
[0032] Further, the end of the sliding block 9 close to the closed cavity 11 is provided with an inverted bevel 14.
[0033] The beneficial effects of such an arrangement are as follows: the inverted bevel can make the linkage between the sliding block and the shutter more sensitive, and the sliding block starts to slide synchronously at the moment the shutter is opened, instantaneously opening the pressure relief passage to achieve pressure relief, and the shutter drives the sliding block to slide more smoothly through the inverted bevel when the shutter is closed.
[0034] Further, the pressure relief passage 26 is V-shaped, and the pressure relief passage 26 comprises a first passage 15 communicated with the inlet 6, a second passage 16 communicated with the outlet 7, and a third passage 17 located between the first passage 15 and the second passage 16.
[0035] The beneficial effects of such an arrangement are as follows: the V-shaped pressure relief passage can make the fluid flow in and out along inertia, increasing the flow rate of the pressure relief passage and achieving rapid pressure relief.
[0036] Further, the communication assembly 27 is provided with two groups, and the two groups of communication assemblies 27 are respectively arranged at positions corresponding to one side of the first passage 15 and one side of the second passage 16.
[0037] The beneficial effects of such an arrangement are as follows: the two groups of communication assemblies are respectively used to connect or disconnect the first passage and the second passage, and both groups of communication assemblies can be effectively linked with the shutter, ensuring the pressure relief effect of the pressure relief passage, and the communication assembly arranged at the second passage can also prevent the fluid at the outlet from flowing back into the pressure relief passage.
[0038] Further, the inner wall of the installation cavity 8 is provided with a first sealing ring 18 and a second sealing ring 19, and the first sealing ring 18 and the second sealing ring 19 are oppositely arranged at both sides of the pressure relief passage 26.
[0039] The beneficial effects of such an arrangement are as follows: the first sealing ring and the second sealing ring greatly improve the sealing performance, the first sealing ring prevents fluid from leaking into the mounting cavity, and the second sealing ring prevents fluid from leaking directly from the first channel to the second channel, thereby ensuring the effective blocking of the pressure relief channel.
[0040] Further, the valve body 1 is further rotationally connected with a discharge member 20, an axis of the discharge member 20 is eccentric to an axis of the valve body 1, the discharge member 20 is provided with a discharge hole 21, and the discharge member 20 has a first state and a second state by rotation, when the discharge member 20 is rotated to the first state, the discharge hole 21 is communicated with the pressure relief channel 26 and the outside of the valve body 1, and when the discharge member 20 is rotated to the second state, the discharge hole 21 is disconnected with the pressure relief channel 26.
[0041] The beneficial effects of such an arrangement are as follows: Figure 2 When the discharge member is in the first state, the discharge hole of the discharge member is communicated with the pressure relief channel, which is used for cleaning and discharging the residual fluid or impurity deposits in the pressure relief channel, thereby preventing the pressure relief channel from being blocked, the rotatable structure design of the discharge member is convenient for regular cleaning, and when the discharge member is in the second state, the end face of the discharge member blocks the connection position of the discharge hole for communication, thereby avoiding leakage.
[0042] Further, the valve body 1 is further rotationally connected with a discharge member 20, an axis of the discharge member 20 is eccentric to an axis of the valve body 1, the discharge member 20 is provided with a discharge hole 21, and the discharge member 20 has a first state and a second state by rotation, when the discharge member 20 is rotated to the first state, the discharge hole 21 is communicated with the pressure relief channel 26 and the outside of the valve body 1, and when the discharge member 20 is rotated to the second state, the discharge hole 21 is disconnected with the pressure relief channel 26.
[0043] The beneficial effects of such an arrangement are as follows: the rotatable structure design of the discharge member is convenient for regular cleaning, and when the discharge member is in the second state, the end face of the discharge member blocks the connection position of the discharge hole for communication, thereby avoiding leakage.
[0044] Further, the valve body 1 is further rotationally connected with a discharge member 20, an axis of the discharge member 20 is eccentric to an axis of the valve body 1, the discharge member 20 is provided with a discharge hole 21, and the discharge member 20 has a first state and a second state by rotation, when the discharge member 20 is rotated to the first state, the discharge hole 21 is communicated with the pressure relief channel 26 and the outside of the valve body 1, and when the discharge member 20 is rotated to the second state, the discharge hole 21 is disconnected with the pressure relief channel 26.
[0045] The beneficial effects of such an arrangement are as follows: the rotatable structure design of the discharge member is convenient for regular cleaning, and when the discharge member is in the second state, the end face of the discharge member blocks the connection position of the discharge hole for communication, thereby avoiding leakage.
[0046] The above disclosure is only a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, therefore, equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.
Claims
1. A pressure relief gate valve, comprising a valve body (1), a valve cover (2), a gate (3), a valve stem (4), and an actuator (5), wherein the valve body (1) has a flow channel inside, the gate (3) is disposed inside the valve body (1) for connecting or blocking the flow channel, the valve cover (2) is connected to the valve body (1), one end of the valve stem (4) passes through the valve cover (2) and is connected to the actuator (5), and the other end is connected to the gate (3), characterized in that: The valve body (1) is provided with a pressure relief channel (26) and also includes a connecting component (27) installed on the valve body (1). The gate (3) and the connecting component (27) cooperate to connect or disconnect the pressure relief channel (26). When the gate (3) is opened, the connecting component (27) connects the pressure relief channel (26). When the gate (3) is closed, the connecting component (27) disconnects the pressure relief channel (26).
2. The pressure relief gate valve according to claim 1, characterized in that: The flow channel is divided into an inlet (6) and an outlet (7) by a gate (3). One end of the pressure relief channel (26) is connected to the inlet (6) and the other end is connected to the outlet (7). The valve body (1) has an installation cavity (8) on the side corresponding to the pressure relief channel (26) for installing the connecting component (27). The connecting component (27) includes a slider (9). The slider (9) is slidably disposed in the installation cavity (8), and the slider (9) has a flow passage (10) adapted to the pressure relief channel (26). When the gate (3) is opened, the flow passage (10) is connected to the pressure relief channel (26). When the gate (3) is closed, the flow passage (10) is disconnected from the pressure relief channel (26).
3. The pressure relief gate valve according to claim 2, characterized in that: The valve body (1) is also provided with a closed cavity (11) that connects to the mounting cavity (8). The connecting component (27) also includes an elastic element (12) and a locking element (13). The locking element (13) is threadedly connected to the end of the mounting cavity (8) away from the closed cavity (11). One end of the elastic element (12) abuts against the locking element (13) and the other end abuts against the slider (9). When the gate (3) is closed, the gate (3) extends into the closed cavity (11) and drives the slider (9) to move to the flow passage (10) and disconnect from the pressure relief passage (26). When the gate (3) is opened, the elastic element (12) drives the slider (9) to move to the flow passage (10) and connect with the pressure relief passage (26).
4. The pressure relief gate valve according to claim 3, characterized in that: The slider (9) has a chamfer (14) at one end near the closed cavity (11).
5. The pressure relief gate valve according to claim 4, characterized in that: The pressure relief channel (26) is V-shaped and includes a first channel (15) connecting the inlet (6), a second channel (16) connecting the outlet (7), and a third channel (17) located between the first channel (15) and the second channel (16).
6. The pressure relief gate valve according to claim 5, characterized in that: The connecting component (27) is provided in two sets, and the two sets of connecting components (27) are respectively located on one side of the first channel (15) and on one side of the second channel (16).
7. The pressure relief gate valve according to claim 6, characterized in that: The inner wall of the mounting cavity (8) is provided with a first sealing ring (18) and a second sealing ring (19), which are arranged opposite to each other on both sides of the pressure relief channel (26).
8. The pressure relief gate valve according to claim 1, characterized in that: A discharge component (20) is rotatably connected to the valve body (1). The axis of the discharge component (20) is eccentrically set with respect to the axis of the valve body (1). A discharge hole (21) is provided on the discharge component (20). The discharge component (20) has a first state and a second state by rotation. When the discharge component (20) rotates to the first state, the discharge hole (21) connects to the pressure relief channel (26) and the outside of the valve body (1). When the discharge component (20) rotates to the second state, the discharge hole (21) is disconnected from the pressure relief channel (26).
9. The pressure relief gate valve according to claim 8, characterized in that: The valve body (1) is also threaded with a locking sleeve (22). The discharge part (20) is limited and set on the valve body (1) by the locking sleeve (22), and the discharge part (20) passes through the locking sleeve (22). A handle (23) protrudes from the end face of the discharge part (20) near the discharge hole (21). An indicator mark (24) is provided on the end face of the valve body (1). When the discharge part (20) is rotated until the handle (23) points to the indicator mark (24), the discharge part (20) is in the first state.
10. The pressure relief gate valve according to claim 8, characterized in that: The discharge component (20) has a third sealing ring (25) on one end face near the pressure relief channel (26), and the third sealing ring (25) surrounds the discharge hole (21).