Exhaust valve
By setting a limiting groove and limiting hole in the exhaust valve, the movement of the end cap is limited, and the problem of the end cap falling off due to vibration of the equipment is solved, ensuring the safety and stability of the equipment operation.
Patent Information
- Application Number
- CN202422433768.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The end cover of the existing exhaust valve is prone to fall off due to equipment vibration, which affects the safety of equipment operation.
An exhaust valve is designed, including a valve body, valve seat, end cover and limiting member. By setting a limiting groove and limiting hole on the valve seat, the limiting member is adjustably connected to the valve seat to limit the movement of the end cover along the axis of the valve seat to avoid falling off.
Effectively prevent the end cap from falling off due to vibration of the equipment, ensuring the safety and stability of the equipment operation.
Smart Images
Figure CN223105381U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to an exhaust valve. Background Art
[0002] When the liquid inside the pipeline flows, the gas contained in the liquid will flow inside the pipeline along with the flow of the liquid and gradually accumulate at the highest point. The exhaust valve is usually arranged at the highest point or the local high point of the system pipeline to discharge the air existing in the pipeline, thereby preventing the pipeline from bursting.
[0003] The exhaust valve in the related art usually includes a valve body assembly, an exhaust assembly and a float. Among them, an air inlet is arranged at the lower end of the valve body assembly, and an installation port is arranged at the upper end of the valve body assembly. The float is floatingly arranged in the valve cavity of the valve body assembly. The exhaust assembly includes a seal, a valve seat and an end cover. The valve seat is installed at the installation port of the valve body assembly. An exhaust passage is arranged in the valve seat. The seal is located at the inlet of the exhaust passage and can selectively block or open the inlet of the exhaust passage under the action of the up and down floating of the float. The end cover is threadedly connected to the outlet of the exhaust passage to selectively block or open the outlet of the exhaust passage. However, when this exhaust valve is used on equipment, the end cover is very easy to fall off due to the vibration of the equipment, affecting the safety of the equipment operation.
[0004] Therefore, it is urgent to propose an exhaust valve to solve the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide an exhaust valve, which can avoid the phenomenon that the end cover falls off due to the vibration of the equipment, thereby ensuring the safety of the equipment operation.
[0006] As conceived above, the technical solution adopted by the utility model is as follows:
[0007] An exhaust valve, comprising:
[0008] A valve body having a valve cavity;
[0009] An exhaust assembly including a valve seat, an end cover and a limiting member. The valve seat is connected to the valve body, and an exhaust passage communicating with the valve cavity is formed thereon. The end cover is adjustably arranged at one end of the valve seat outside the valve body along the axis direction of the valve seat and can selectively block or open the outlet of the exhaust passage. A limiting hole is arranged on the side wall of the end cover. The limiting member can pass through the limiting hole and be limited on the valve seat to limit the movement of the end cover along the axis direction of the valve seat.
[0010] As a preferred solution of the exhaust valve provided by the utility model, a limiting groove is arranged on the side wall of the valve seat, and one end of the limiting member passing through the limiting hole can extend into the limiting groove.
[0011] As a preferred solution of the exhaust valve provided by the present utility model, the limiting groove is an annular groove.
[0012] As a preferred solution of the exhaust valve provided by the present utility model, the dimension of the limiting groove along the axis direction of the valve seat is greater than or equal to the displacement of the end cover along the axis direction of the valve seat from the exhaust position to the closed position.
[0013] As a preferred solution of the exhaust valve provided by the present utility model, the number of the limiting grooves is multiple, and each of the limiting grooves is arranged at intervals along the axis direction of the valve seat.
[0014] As a preferred solution of the exhaust valve provided by the present utility model, the number of the limiting holes is multiple, and each of the limiting holes is arranged at intervals along the axis direction of the end cover. The limiting member can selectively pass through any one of the limiting holes and extend into the limiting groove.
[0015] As a preferred solution of the exhaust valve provided by the present utility model, the limiting groove is a strip-shaped groove extending along the axis direction of the valve seat, the number of the limiting holes is multiple, and each of the limiting holes is arranged at intervals along the circumferential direction of the end cover. The limiting member can selectively pass through any one of the limiting holes and extend into the limiting groove.
[0016] As a preferred solution of the exhaust valve provided by the present utility model, the limiting member is a limiting bolt, and the limiting hole is a threaded hole.
[0017] As a preferred solution of the exhaust valve provided by the present utility model, an exhaust hole communicating with the exhaust passage is further arranged on the end cover, and the exhaust hole is located on the side of the limiting hole away from the valve body.
[0018] The beneficial effects of the present utility model are as follows:
[0019] The present utility model provides an exhaust valve, which includes a valve body and an exhaust assembly. The valve body has a valve cavity; the exhaust assembly includes a valve seat, an end cover and a limiting member. The valve seat is connected to the valve body, and an exhaust passage communicating with the valve cavity is opened thereon. The end cover is arranged at one end of the valve seat outside the valve body in an adjustable manner along the axis direction of the valve seat, and can selectively block or open the outlet of the exhaust passage. A limiting hole is arranged on the side wall of the end cover, and the limiting member can pass through the limiting hole and be limited on the valve seat to limit the movement of the end cover along the axis direction of the valve seat. By arranging the limiting member to limit the movement of the end cover along the axis direction of the valve seat, the phenomenon that the end cover falls off due to the vibration of the equipment can be avoided, thereby ensuring the safety of the equipment operation. Description of the Drawings
[0020] Figure 1 It is a schematic structural diagram of the exhaust valve provided in the first embodiment of the present utility model;
[0021] Figure 2 It is a cross-sectional schematic view of the exhaust valve provided in the first embodiment of the present utility model;
[0022] Figure 3 It is a structural schematic view of the end cover provided in the first embodiment of the present utility model;
[0023] Figure 4 It is a structural schematic view of the valve seat provided in the first embodiment of the present utility model;
[0024] Figure 5 is Figure 2 A partial enlarged view at A;
[0025] Figure 6 is Figure 2 A partial structural schematic view of;
[0026] Figure 7 It is a cross-sectional schematic view of the valve seat provided in the second embodiment of the present utility model;
[0027] Figure 8 It is a cross-sectional schematic view of the valve seat provided in the fourth embodiment of the present utility model.
[0028] In the figure:
[0029] 100, valve body; 1001, valve cavity; 110, valve main body; 120, valve cover; 121, installation port;
[0030] 200, exhaust assembly; 210, valve seat; 211, exhaust passage; 212, limit groove; 213, first installation groove; 214, second installation groove; 220, valve needle; 221, accommodation groove; 230, return spring; 240, plugging member; 250, end cover; 251, limit hole; 252, exhaust hole; 260, exhaust seal; 270, limiting member;
[0031] 300, float;
[0032] 400, connecting seat; 401, sealing surface; 402, first convex structure;
[0033] 500, return seat; 501, intake passage; 502, intake port; 503, second convex structure;
[0034] 600, return member;
[0035] 701, first seal; 702, second seal; 703, third seal; 704, fourth seal; 705, fifth seal. Detailed implementation manners
[0036] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.
[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.
[0039] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, 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. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0040] Embodiment 1
[0041] Figure 1 shows a schematic structural diagram of the exhaust valve provided in this embodiment. Figure 2 shows a schematic cross-sectional view of the exhaust valve provided in this embodiment. Figure 3 shows a schematic structural diagram of the end cap 250 provided in this embodiment. As Figures 1 - 3As shown, this embodiment provides an exhaust valve, which includes a valve body 100 and an exhaust assembly 200. The valve body 100 has a valve cavity 1001; the exhaust assembly 200 includes a valve seat 210, an end cover 250, and a limiting member 270. The valve seat 210 is connected to the valve body 100, and an exhaust passage 211 communicating with the valve cavity 1001 is provided thereon. The end cover 250 is adjustably arranged at one end of the valve seat 210 outside the valve body 100 along the axis direction of the valve seat 210, and can selectively block or open the outlet of the exhaust passage 211. A limiting hole 251 is provided on the side wall of the end cover 250. The limiting member 270 can pass through the limiting hole 251 and be limited on the valve seat 210 to limit the movement of the end cover 250 along the axis direction of the valve seat 210. By providing the limiting member 270 to limit the movement of the end cover 250 along the axis direction of the valve seat 210, the phenomenon that the end cover 250 falls off due to equipment vibration can be avoided, thereby ensuring the safety of equipment operation.
[0042] Figure 4 The structural schematic diagram of the valve seat 210 provided in this embodiment is shown. As Figure 4 and combined with Figure 2 , Figure 3 shown, a limiting groove 212 is provided on the side wall of the valve seat 210. One end of the limiting member 270 passing through the limiting hole 251 can extend into the limiting groove 212. By providing the limiting groove 212 on the valve seat 210, the limiting effect of the valve seat 210 on the limiting member 270 can be further improved. Even when the end cover 250 is displaced relative to the valve seat 210 due to equipment vibration, the groove wall of the limiting groove 212 can also be in contact with the limiting member 270 to prevent the end cover 250 from continuing to move, thereby avoiding the end cover 250 from falling off.
[0043] Of course, in other embodiments, the limiting groove 212 may not be provided on the valve seat 210, and the limiting member 270 directly abuts against the outer wall of the valve seat 210 after passing through the limiting hole 251 to achieve the limiting effect.
[0044] In this embodiment, the limiting hole 251 is a threaded hole, and the limiting member 270 is a limiting bolt, and the limiting bolt is threadedly connected to the limiting hole 251. This design can further improve the limiting effect of the limiting member 270 on the end cover 250, and is convenient for the operator to adjust the position of the end cover 250 relative to the axis direction of the valve seat 210. When the position of the end cover 250 needs to be adjusted, the operator can first loosen the limiting member 270 to make a gap between the limiting member 270 and the limiting groove 212, and then rotate the end cover 250 to move it along the axis direction of the valve seat 210. When the end cover 250 is adjusted to the appropriate position, then tighten the limiting member 270, which is convenient and fast.
[0045] It should be explained that, as Figure 2 and Figure 3As shown, the end cap 250 is threadedly connected to the valve seat 210. By rotating the end cap 250, the position of the end cap 250 along the axis of the valve seat 210 can be adjusted to open or block the outlet of the exhaust passage 211 on the valve seat 210. Specifically, an exhaust hole 252 is provided on the end cap 250. When exhaust is required, the end cap 250 can be adjusted to the exhaust position. At this time, the exhaust hole 252 is in communication with the exhaust passage 211, and the gas in the valve cavity 1001 of the valve body 100 can be discharged from the exhaust hole 252 after passing through the exhaust passage 211. When the exhaust valve fails, the end cap 250 can be adjusted to the closed position. At this time, the exhaust valve acts as a plug to prevent the liquid in the pipeline from leaking from the exhaust hole 252 of the end cap 250 after passing through the exhaust passage 211. Optionally, the exhaust hole 252 is located on the side of the limit hole 251 away from the valve body 100 to prevent the limit member 270 from not being able to extend into the limit groove 212 when the end cap 250 is in the exhaust position.
[0046] Optionally, to ensure that the outlet of the exhaust passage 211 can be effectively blocked when the end cap 250 is in the closed position, an exhaust seal 260 is further provided inside the end cap 250. That is to say, when the end cap 250 is in the exhaust position, the exhaust seal 260 can press against the outlet of the exhaust passage 211 to achieve effective sealing of the exhaust passage 211. When the end cap 250 is in the closed position, the exhaust seal 260 is spaced from the outlet of the exhaust passage 211 to ensure that the gas in the valve cavity 1001 can smoothly pass through the exhaust passage 211 and be discharged from the exhaust hole 252 of the end cap 250.
[0047] It can be understood that since the end cap 250 is threadedly connected to the valve seat 210, when the end cap 250 is displaced relative to the valve seat 210, the relative position of the limit hole 251 in the circumferential and / or axial directions of the valve seat 210 will also change. To ensure that the limit member 270 can play a role in limiting the relative position of the end cap 250 and the valve seat 210 regardless of the position of the end cap 250, as Figure 3 and Figure 4 shown, the limit groove 212 is an annular groove so that the limit member 270 can still extend into the limit groove 212 after the circumferential position of the end cap 250 relative to the valve seat 210 is adjusted. Further, the dimension of the limit groove 212 along the axis of the valve seat 210 is greater than or equal to the displacement of the end cap 250 along the axis of the valve seat 210 when moving from the exhaust position to the closed position, so that the limit member 270 can still extend into the limit groove 212 after the axial position of the end cap 250 relative to the valve seat 210 is adjusted. When the end cap 250 is rotated to switch between the exhaust position and the closed position, the limit member 270 can pass through the limit hole 251 and extend into the limit groove 212.
[0048] Figure 5 shows Figure 2 a partial enlarged view at A. As Figure 5and in combination with Figure 2 As shown, the exhaust assembly 200 further includes a valve needle 220. The valve needle 220 is movably disposed in the valve cavity 1001 and can be switched between a blocking position for blocking the inlet of the exhaust passage 211 and an open position for opening the inlet of the exhaust passage 211 to connect the exhaust passage 211 and the valve cavity 1001. When the gas in the valve cavity 1001 of the valve body 100 needs to be discharged, the valve needle 220 can be moved to the open position to connect the exhaust passage 211 and the valve cavity 1001 of the valve body 100, so that the gas in the valve cavity 1001 is discharged from the exhaust hole 252 after passing through the exhaust passage 211; when the gas in the valve cavity 1001 of the valve body 100 is exhausted, the valve needle 220 can be moved to the blocking position to cut off the connection between the exhaust passage 211 and the valve cavity 1001, thereby preventing the liquid in the pipeline from leaking from the exhaust hole 252 after passing through the exhaust passage 211.
[0049] Further, the exhaust valve further includes a float 300. The float 300 is floatingly disposed in the valve cavity 1001 of the valve body 100; the exhaust assembly 200 further includes a blocking member 240 and a return spring 230. The two ends of the return spring 230 are respectively connected to the valve needle 220 and the valve seat 210. A blocking member 240 is connected to one end of the valve needle 220 close to the valve seat 210. The end of the valve needle 220 far from the valve seat 210 abuts against the float 300 and can be switched between the blocking position and the open position under the floating action of the float 300. When there is gas overflow in the pipeline, the gas will flow along with the liquid and gather at the highest point of the pipeline (i.e., the position where the exhaust valve is installed). After the gas enters the valve cavity 1001 of the valve body 100, it can pass through the gap between the valve cavity 1001 and the float 300 and flow above the float 300. As the gas above the float 300 increases and the pressure increases, the liquid level in the valve cavity 1001 drops, and the float 300 floats downward with the drop of the liquid level, thereby driving the valve needle 220 and the blocking member 240 connected thereto to rotate relative to the valve seat 210, so as to switch to the open position. The gas located above the float 300 can then be discharged from the exhaust hole 252 through the exhaust passage 211; when the gas is exhausted, the liquid level in the valve cavity 1001 rises, and the float 300 rises under the action of buoyancy. The valve needle 220 can be reset under the elastic action of the return spring 230 to switch to the blocking position, cutting off the connection between the exhaust passage 211 and the valve cavity 1001 and preventing the liquid in the pipeline from leaking from the exhaust hole 252 after passing through the exhaust passage 211.
[0050] It should be noted that the float 300 belongs to a relatively mature technology in the prior art, and the specific structure of the float 300 will not be elaborated in this embodiment.
[0051] Optionally, a first external thread is provided at one end of the valve seat 210 close to the valve needle 220, and a second external thread is provided at one end of the valve needle 220 close to the valve seat 210. Both ends of the return spring 230 are respectively screwed into the thread grooves of the first external thread and the second external thread, and are used to provide a restoring force for the valve needle 220 when the float 300 rises, so as to drive the valve needle 220 to reset after the exhaust ends, so that the sealing member 240 is in close fit with the valve seat 210, realizing effective sealing of the inlet of the exhaust passage 211.
[0052] To achieve a stable connection between the sealing member 240 and the valve needle 220, a receiving groove 221 is provided at one end of the valve needle 220 facing the valve seat 210. The sealing member 240 is partially received in the receiving groove 221 and is in interference fit with the receiving groove 221 to prevent the sealing member 240 from falling off the valve needle 220. In this embodiment, the cross section of the sealing member 240 is T-shaped. The small end of the sealing member 240 is received in the receiving groove 221, and the large end of the sealing member 240 is used to seal the inlet of the exhaust passage 211.
[0053] Optionally, the valve body 100 is further provided with an installation port 121 communicating with the valve cavity 1001. The valve seat 210 is sealingly connected to the installation port 121 to prevent the liquid in the valve cavity 1001 from leaking through the gap between the valve seat 210 and the installation port 121. In this embodiment, the valve seat 210 is threadedly connected to the installation port 121. Threaded connection has the advantages of simple processing and convenient disassembly and assembly. Specifically, the installation port 121 is a stepped hole. The large-diameter end of the stepped installation port 121 faces outward, and an internal thread is provided on the inner wall of the large-diameter end of the installation port 121. An external thread that is threadedly engaged with the internal thread is provided on the outer wall of the valve seat 210.
[0054] To achieve a sealing connection between the valve seat 210 and the installation port 121, a first sealing member 701 is provided between the stepped surface of the installation port 121 and the valve seat 210. Optionally, the valve seat 210 is further provided with a first installation groove 213 for installing the first sealing member 701 to achieve stable installation of the first sealing member 701. Further, a second sealing member 702 is further provided between the small-diameter end of the installation port 121 and the valve seat 210 to further improve the sealing effect between the valve seat 210 and the installation port 121. Optionally, the valve seat 210 is further provided with a second installation groove 214 for installing the second sealing member 702 to achieve stable fixation of the second sealing member 702.
[0055] Figure 6 is Figure 2 partial structural schematic diagram of. As Figure 6 and in combination with Figure 2As shown in the figure, the exhaust valve further includes a connecting seat 400, a return seat 500 and a return member 600. The connecting seat 400 is sleeved on the bottom of the valve body 100; the return seat 500 is inserted into the connecting seat 400 and can abut against the bottom of the valve body 100. An air inlet passage 501 communicating with the valve cavity 1001 of the valve body 100 is provided in the return seat 500, and an air inlet 502 communicating with the air inlet passage 501 is provided on the side wall of the return seat 500; the return member 600 is arranged between the connecting seat 400 and the return seat 500, and both ends of the return member 600 are respectively connected to the connecting seat 400 and the return seat 500. When the exhaust valve needs to be used on the corresponding equipment, the connecting seat 400 is used to connect the equipment installation position, and the return seat 500 can partially extend into the pipeline. The gas in the pipeline can flow into the air inlet passage 501 from the air inlet 502 provided on the return seat 500, and then enter the valve cavity 1001 of the valve body 100. When the exhaust valve fails and the valve body 100 needs to be removed from the connecting seat 400, the return seat 500 can move upward under the elastic action of the return member 600, so that the return seat 500 is disengaged from the pipeline, avoiding the leakage of the liquid in the pipeline from the return seat 500 and the connecting seat 400.
[0056] Optionally, a third seal 703 is sleeved on the return seat 500. The air inlet 502 is located between the third seal 703 and the valve body 100. A sealing surface 401 capable of sealingly cooperating with the third seal 703 is provided at the bottom of the connecting seat 400. After the valve body 100 is removed from the connecting seat 400, the third seal 703 can sealingly cooperate with the sealing surface 401 at the bottom of the connecting seat 400, further avoiding the leakage of the liquid in the pipeline. Optionally, the inner diameter of the sealing surface 401 increases sequentially from top to bottom. On the one hand, it is used to cooperate with the third seal 703 to achieve the seal between the connecting seat 400 and the return seat 500. On the other hand, it can also limit the return seat 500 to prevent it from disengaging from the upper end of the connecting seat 400 under the elastic action of the return member 600.
[0057] Optionally, the return member 600 is a spring. The spring has a large restoring force and is convenient to obtain materials, which can reduce the processing cost. In this embodiment, a first convex structure 402 protrudes inward from the inner wall of the connecting seat 400, and a second convex structure 503 protrudes outward from the outer wall of the return seat 500. The second convex structure 503 is located above the first convex structure 402, and both ends of the return member 600 respectively abut against the first convex structure 402 and the second convex structure 503.
[0058] Continue as Figure 2 and Figure 6As shown, the valve body 100 includes a valve main body 110 and a valve cover 120 mounted on the valve main body 110. The bottom of the valve main body 110 is connected to a connecting seat 400, and an installation port 121 is opened on the valve cover 120. In this embodiment, the connecting seat 400 is threadedly connected to the valve main body 110, and a fourth sealing member 704 is further provided between the connecting seat 400 and the valve main body 110 to achieve a sealed connection therebetween and prevent the liquid in the pipeline from leaking through the gap between the connecting seat 400 and the valve main body 110.
[0059] Optionally, the valve cover 120 is threadedly connected to the valve main body 110, and a fifth sealing member 705 is provided between the valve cover 120 and the valve main body 110 to achieve a sealed connection therebetween and prevent the liquid in the pipeline from leaking through the gap between the valve cover 120 and the valve main body 110.
[0060] The following combines Figures 1 - 6 Briefly describe the working principle of this exhaust valve:
[0061] 1) When there is gas overflow in the pipeline, the gas will flow along with the liquid flow and gather at the highest point of the pipeline (i.e., the position where this exhaust valve is installed). After the gas enters the valve cavity 1001 of the valve body 100, it can pass through the gap between the valve cavity 1001 of the valve body 100 and the float 300 and flow to the upper part of the float 300. As the gas above the float 300 increases and the pressure increases, the liquid level in the valve cavity 1001 drops, and the float 300 floats downward with the liquid level drop, thereby driving the valve needle 220 and the plugging member 240 connected thereto to rotate relative to the valve seat 210, so as to switch to the open position. The gas located above the float 300 can then be discharged from the exhaust hole 252 of the end cover 250 through the exhaust passage 211; after the gas is exhausted, the liquid level in the valve cavity 1001 rises, and the float 300 rises under the action of buoyancy. The valve needle 220 can be reset under the elastic action of the return spring 230 to switch to the plugging position, cutting off the passage between the exhaust passage 211 and the valve cavity 1001 of the valve body 100 and preventing the liquid in the pipeline from leaking from the exhaust hole 252 of the end cover 250 through the exhaust passage 211.
[0062] 2) When a negative pressure is generated in the pipeline, the liquid level in the valve chamber 1001 of the valve body 100 drops, and the floating cylinder 300 floats downward as the liquid level drops, thereby driving the valve needle 220 and the sealing member 240 connected thereto to rotate relative to the valve seat 210, so as to switch to the open position. Since the external atmospheric pressure is greater than the pressure in the pipeline at this time, the atmosphere will enter the valve chamber 1001 through the exhaust hole 252 of the end cover 250; when the pressure in the pipeline returns to normal, the liquid level in the valve chamber 1001 rises, and the floating cylinder 300 rises under the action of buoyancy. The valve needle 220 can be reset under the elastic action of the return spring 230 to switch to the sealing position, cutting off the passage between the exhaust passage 211 and the valve chamber 1001 of the valve body 100, and preventing the liquid in the pipeline from leaking from the exhaust hole 252 of the end cover 250 through the exhaust passage 211.
[0063] 3) When the exhaust valve fails and leaks occur at the exhaust hole 252 of the end cover 250, the operator can rotate the end cover 250 to adjust it to the closed position, so that the exhaust seal 260 presses tightly against the outlet of the exhaust passage 211. At this time, the exhaust valve acts as a plug to prevent the liquid in the pipeline from leaking from the exhaust hole 252 of the end cover 250 through the exhaust passage 211.
[0064] Embodiment 2
[0065] This embodiment provides an exhaust valve. The specific structure of this exhaust valve is substantially the same as that of the exhaust valve provided in Embodiment 1, except that: the number of the limiting grooves 212 provided on the valve seat 210 is different.
[0066] Figure 7 The cross-sectional schematic view of the valve seat 210 provided in this embodiment is shown. As Figure 7 shown, in this embodiment, the limiting groove 212 opened on the valve seat 210 is an annular groove, so that after the circumferential position of the end cover 250 relative to the valve seat 210 is adjusted, the limiting member 270 can still extend into the limiting groove 212.
[0067] Furthermore, the number of the limiting grooves 212 is multiple, and the limiting grooves 212 are arranged at intervals along the axial direction of the valve seat 210. The limiting member 270 can pass through the limiting hole 251 and selectively extend into any limiting groove 212, so as to realize the limitation of the end cover 250.
[0068] In this embodiment, the number of the limiting grooves 212 is two. That is, when the end cover 250 is in the exhaust position, the limiting member 270 can pass through the limiting hole 251 and extend into one of the limiting grooves 212; when the end cover 250 is in the closed position, the limiting member 270 can pass through the limiting hole 251 and extend into the other limiting groove 212. Of course, in other embodiments, the number of the limiting grooves 212 can also be three, four, five, or even more, so that the end cover 250 can be stably limited at any position between the exhaust position and the closed position.
[0069] Embodiment III
[0070] This embodiment provides an exhaust valve. The specific structure of this exhaust valve is substantially the same as that of the exhaust valve provided in Embodiment II, except that: the number of the limiting holes 251 provided on the end cover 250 is different.
[0071] In this embodiment, the width of the limiting groove 212 on the valve seat 210 is the same as that of the limiting groove 212 on the valve seat 210 in Embodiment II, but the number of the limiting grooves 212 provided on the valve seat 210 in this embodiment is one. To effectively limit the end cover 250, the number of the limiting holes 251 is multiple, and the limiting holes 251 are arranged at intervals along the axial direction of the end cover 250. The limiting member 270 can selectively pass through any one of the limiting holes 251 and extend into the limiting groove 212. Optionally, the multiple limiting holes 251 are all threaded holes and have the same aperture, so that the limiting member 270 can be adapted to each limiting hole 251.
[0072] Embodiment IV
[0073] This embodiment provides an exhaust valve. The specific structure of this exhaust valve is substantially the same as that of the exhaust valve provided in Embodiment I, except that: the structures of the valve seat 210 and the end cover 250 are different.
[0074] Figure 8 The cross-sectional schematic view of the valve seat 210 provided in this embodiment is shown. As Figure 8 and in combination with Figure 3 shown, in this embodiment, the limiting groove 212 is a strip-shaped groove extending along the axial direction of the valve seat 210, and the number of the limiting holes 251 is multiple. The limiting holes 251 are arranged at intervals along the circumferential direction of the end cover 250. During use, the limiting member 270 can selectively pass through any one of the limiting holes 251 and extend into the limiting groove 212, so that when the end cover 250 is switched between the exhaust position and the closed position, the limiting groove 212 on the valve seat 210 can always correspond to one of the limiting holes 251 to realize the stable limitation of the end cover 250 by the limiting member 270; in addition, this setting method can also reduce the width of the limiting groove 212 to ensure the structural strength of the valve seat 210. In this embodiment, the multiple limiting holes 251 are all threaded holes.
[0075] In this embodiment, neither the specific number of the limiting holes 251 nor the distance between two adjacent limiting holes 251 is limited, and the designer can adjust the specific number of the limiting holes 251 and the distance between two adjacent limiting holes 251 according to actual needs.
[0076] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.
Claims
1. An exhaust valve, characterized in that, Comprising: A valve body (100) having a valve cavity (1001); An exhaust assembly (200) including a valve seat (210), an end cover (250) and a limiting member (270). The valve seat (210) is connected to the valve body (100), and an exhaust passage (211) communicating with the valve cavity (1001) is formed therein. The end cover (250) is adjustably disposed at one end of the valve seat (210) outside the valve body (100) along the axial direction of the valve seat (210), and can selectively block or open the outlet of the exhaust passage (211). A limiting hole (251) is formed in the side wall of the end cover (250). The limiting member (270) can pass through the limiting hole (251) and be limited on the valve seat (210) to limit the movement of the end cover (250) along the axial direction of the valve seat (210).
2. The exhaust valve according to claim 1, characterized in that, A limiting groove (212) is formed in the side wall of the valve seat (210), and one end of the limiting member (270) passing through the limiting hole (251) can extend into the limiting groove (212).
3. The exhaust valve according to claim 2, wherein The limiting groove (212) is an annular groove.
4. The exhaust valve according to claim 3, characterized in that, The dimension of the limiting groove (212) along the axial direction of the valve seat (210) is greater than or equal to the displacement of the end cover (250) along the axial direction of the valve seat (210) from the exhaust position to the closed position.
5. The exhaust valve according to claim 3, characterized in that, The number of the limiting grooves (212) is multiple, and the limiting grooves (212) are arranged at intervals along the axial direction of the valve seat (210).
6. The exhaust valve according to claim 3, characterized in that The number of the limiting holes (251) is multiple, and the limiting holes (251) are arranged at intervals along the axial direction of the end cover (250). The limiting member (270) can selectively pass through any of the limiting holes (251) and extend into the limiting groove (212).
7. The exhaust valve according to claim 2, characterized in that, The limiting groove (212) is a strip-shaped groove extending along the axial direction of the valve seat (210). The number of the limiting holes (251) is multiple, and the limiting holes (251) are arranged at intervals along the circumferential direction of the end cover (250). The limiting member (270) can selectively pass through any of the limiting holes (251) and extend into the limiting groove (212).
8. The exhaust valve according to any one of claims 1 to 7, characterized in that, The limiting member (270) is a limiting bolt, and the limiting hole (251) is a threaded hole.
9. The exhaust valve according to any one of claims 1 to 7, characterized in that, An exhaust hole (252) communicating with the exhaust passage (211) is further formed in the end cover (250), and the exhaust hole (252) is located on the side of the limiting hole (251) away from the valve body (100).