Exhaust cap anti-falling structure and exhaust valve

Abstract

The utility model belongs to the technical field of valves, and discloses an exhaust cap anti-falling structure and an exhaust valve. The exhaust cap anti-falling structure comprises a valve seat, an exhaust cap and a limiting piece, an exhaust channel is formed in the valve seat, an exhaust port is formed in one end of the exhaust channel, a limiting groove is formed in the outer wall, close to the exhaust port end, of the valve seat, and a containing cavity with an opening is formed in the exhaust cap and comprises a bottom wall and an annular side wall. The inner wall of the annular side wall is provided with an annular clamping groove opposite to the limiting groove, the bottom wall of the containing cavity covers the exhaust port so as to open or close the exhaust port, one part of the limiting piece is embedded in the annular clamping groove and fixed relative to the exhaust cap, and the other part of the limiting piece is arranged in the limiting groove and can slide in the axial direction of the limiting groove. Therefore, the opening and closing strokes of the exhaust cap are limited, the exhaust cap is prevented from falling off due to vibration of the pipeline, the exhaust cap is effectively prevented from being lost, and the running safety of the pipeline is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-dropping structure for an exhaust cap and 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.

[0003] The exhaust valve usually includes a valve body assembly, an exhaust assembly and a floating cylinder. Among them, an air inlet is arranged at the lower end of the valve body assembly, an installation port is arranged at the upper end of the valve body assembly, the floating cylinder is movably arranged in the valve cavity of the valve body assembly, the exhaust assembly includes a sealing member, a valve seat and a sealing end cover, the valve seat is installed in the installation port of the valve body assembly, an exhaust passage is arranged in the valve seat, the sealing member is located at the inlet of the exhaust passage and can selectively block or open the air inlet of the exhaust passage under the action of the up and down floating of the floating cylinder, and the sealing end cover is arranged at the outlet of the exhaust passage to selectively block or open the outlet of the exhaust passage.

[0004] However, when the existing exhaust valve is used on the pipeline, the sealing end cover is very easy to fall off due to the vibration of the pipeline, resulting in the loss of the sealing end cover and affecting the safety of the pipeline operation.

[0005] Therefore, there is an urgent need for an anti-dropping structure for an exhaust cap and an exhaust valve to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an anti-dropping structure for an exhaust cap, which limits the opening and closing strokes of the exhaust cap, prevents the exhaust cap from falling off due to the vibration of the pipeline, effectively prevents the loss of the exhaust cap, and ensures the safety of the pipeline operation.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The anti-dropping structure for an exhaust cap includes:

[0009] A valve seat, an exhaust passage is arranged in the valve seat, one end of the exhaust passage is provided with an exhaust port, and a circular limiting groove is arranged on the outer wall of the valve seat near the exhaust port end;

[0010] An exhaust cap, an accommodating cavity with an opening is formed inside the exhaust cap, the accommodating cavity includes a bottom wall and a circular side wall, a circular clamping groove opposite to the limiting groove is arranged on the inner wall of the circular side wall, and the bottom wall covers the exhaust port to open or close the exhaust port;

[0011] The limiting member, a part of the limiting member is embedded in the annular card slot, and the other part of the limiting member is arranged in the limiting groove, and the limiting member can slide axially along the limiting groove.

[0012] Optionally, the exhaust cap anti-detachment structure further includes a sealing gasket, and the sealing gasket is clamped between the bottom wall and the exhaust port.

[0013] Optionally, the limiting member is a polygonal snap ring with a notch.

[0014] Optionally, the polygonal snap ring includes straight segments and arc segments, and adjacent two straight segments are connected by the arc segments. The arc segments are embedded in the annular card slot, and the straight segments are arranged in the limiting groove and can slide axially along the limiting groove.

[0015] Optionally, the straight segments and the arc segments are integrally formed.

[0016] Optionally, the limiting groove includes a first limiting end face and a second limiting end face, and the straight segment can abut against the first limiting end face or the second limiting end face.

[0017] Optionally, the limiting member is a regular polygonal snap ring with a notch.

[0018] Optionally, the regular polygonal snap ring includes a plurality of straight segments connected in sequence.

[0019] Optionally, the annular side wall is provided with internal threads, and the exhaust port end of the valve seat is provided with external threads, and the internal threads are screwed with the external threads.

[0020] Another object of the present invention is to provide an exhaust valve, which can effectively prevent the exhaust cap from falling off due to vibration during the operation of the pipeline, and greatly improves the safety of the exhaust valve.

[0021] To achieve this purpose, the present invention adopts the following technical solutions:

[0022] The exhaust valve includes the above-mentioned exhaust cap anti-detachment structure.

[0023] Beneficial effects:

[0024] The anti - detachment structure of the exhaust cap provided by the utility model includes a valve seat, an exhaust cap and a limiting member. An exhaust passage is provided in the valve seat. One end of the exhaust passage is provided with an exhaust port. An annular limiting groove is provided on the outer wall of the valve seat near the exhaust port end. The inside of the exhaust cap forms a receiving cavity with an opening. The receiving cavity includes a bottom wall and an annular side wall. An annular clamping groove is provided on the inner wall of the annular side wall. The bottom wall of the receiving cavity covers the exhaust port to open or close the exhaust port. A part of the limiting member is embedded in the annular clamping groove and is relatively fixed to the exhaust cap. Another part of the limiting member is arranged in the limiting groove and can slide along the axial direction of the limiting groove, so as to limit the opening and closing strokes of the exhaust cap, prevent the exhaust cap from falling off due to pipeline vibration, effectively prevent the loss of the exhaust cap, and ensure the safety of pipeline operation.

[0025] The limiting member in the utility model can be a polygonal circlip. A part of the polygonal circlip is limited in the annular clamping groove, and another part of the polygonal circlip can slide along the axial direction of the limiting groove to limit the movement stroke of the exhaust cap. The polygonal circlip can be made of a rod - shaped member with a relatively thin diameter, which is convenient for processing. And the polygonal circlip has a simple structure and is easy to deform. It does not require specific tooling and can be installed manually, improving the convenience and assembly efficiency of the assembly of the polygonal circlip.

[0026] The exhaust valve provided by the utility model includes the above - mentioned anti - detachment structure of the exhaust cap, which effectively prevents the exhaust cap from falling off due to vibration during the operation of the pipeline, greatly improving the safety of the exhaust valve. Description of the Drawings

[0027] Figure 1 is a cross - sectional view of the anti - detachment structure of the exhaust cap provided by Embodiment 1 of the utility model from a perspective;

[0028] Figure 2 is Figure 1 the cross - sectional view at A - A in

[0029] Figure 3 is a cross - sectional view of the limiting member assembled on the exhaust cap provided by Embodiment 1 of the utility model;

[0030] Figure 4 is a schematic structural view of the limiting member provided by Embodiment 1 of the utility model;

[0031] Figure 5 is a schematic structural view of the valve seat provided by Embodiment 1 of the utility model;

[0032] Figure 6 is a cross - sectional view of the exhaust cap provided by Embodiment 1 of the utility model;

[0033] Figure 7 is a schematic structural view of the limiting member provided by Embodiment 2 of the utility model;

[0034] Figure 8 This is a cross-sectional view of the exhaust valve provided in the third embodiment of the present utility model.

[0035] In the figure:

[0036] 100, valve seat; 110, exhaust passage; 120, limit groove; 121, first limit end face; 122, second limit end face; 130, first annular sealing groove; 140, second limit platform; 150, second annular sealing groove;

[0037] 200, exhaust cap; 210, accommodation cavity; 220, annular clamping groove; 230, ventilation hole;

[0038] 300, limiting member; 310, straight section; 320, arc section;

[0039] 400, gasket;

[0040] 500, valve body assembly; 510, valve body; 511, air inlet; 520, valve cover; 521, first limit platform; 530, valve cavity;

[0041] 600, float;

[0042] 700, seal. Detailed implementation manners

[0043] The present utility model will be further described in detail below in conjunction with 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. Additionally, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", 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 internal communication of two components or the interaction relationship between two components. 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 circumstances.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings. They are 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 should not be construed 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.

[0047] Embodiment 1

[0048] This embodiment provides an anti - detachment structure for an exhaust cap, as Figures 1-5 shown. The anti - detachment structure for the exhaust cap includes a valve seat 100, an exhaust cap 200 and a limiting member 300. An exhaust passage 110 is provided in the valve seat 100. One end of the exhaust passage 110 is provided with an exhaust port. A limiting groove 120 is provided on the outer wall of the exhaust port end of the valve seat 100. An accommodating cavity 210 with an opening is formed inside the exhaust cap 200. The accommodating cavity 210 includes a bottom wall and an annular side wall. An annular clamping groove 220 is provided on the inner wall of the annular side wall. The bottom wall of the accommodating cavity 210 covers the exhaust port to open or close the exhaust port. A part of the limiting member 300 is embedded in the annular clamping groove 220 and is relatively fixed to the exhaust cap 200. Another part of the limiting member 300 is arranged in the limiting groove 120 and can slide axially along the limiting groove 120, so as to limit the opening and closing strokes of the exhaust cap 200, prevent the exhaust cap 200 from falling off due to pipeline vibration, effectively prevent the loss of the exhaust cap 200, and ensure the safety of pipeline operation.

[0049] Optionally, as Figure 1As shown, the anti-detachment structure of the exhaust cap further includes a gasket 400. The gasket 400 is clamped between the bottom wall of the accommodation cavity 210 and the exhaust port. The gasket 400 is arranged between the exhaust cap 200 and the exhaust port to form a reliable sealing layer, which can effectively prevent gas leakage, thereby improving the sealing performance of the exhaust valve. In this embodiment, the gasket 400 is a rubber gasket. The rubber gasket has good elasticity and sealing performance, can closely fit the exhaust port and the bottom wall of the accommodation cavity 210, effectively prevent gas leakage, and improve the overall sealing performance.

[0050] Optionally, as Figures 2-4 shown, the limiting member 300 is a polygonal snap ring with a notch. A part of the polygonal snap ring is limited in the annular groove 220, and the other part of the polygonal snap ring can slide along the axial direction of the limiting groove 120, so as to limit the opening and closing strokes of the exhaust cap 200. The polygonal snap ring can be made of a rod-shaped member with a relatively thin diameter, such as a wire or a steel wire. The rod-shaped member is integrally bent to form a polygonal snap ring, which is convenient for the production and processing of the polygonal snap ring. And the formed polygonal snap ring has a simple structure and is easy to deform. Without a specific tooling, after deforming the polygonal snap ring manually, the polygonal snap ring is assembled in the annular groove 220 of the exhaust cap 200, and then the polygonal snap ring restores its original shape by its own elastic force, and the installation of the polygonal snap ring can be completed, which improves the convenience and assembly efficiency of the assembly of the polygonal snap ring.

[0051] Optionally, as Figure 4 shown, the polygonal snap ring includes a straight section 310 and an arc section 320. Adjacent two straight sections 310 are connected by an arc section 320. The arc section 320 is embedded in the annular groove 220, and the straight section 310 is arranged in the limiting groove 120 and can slide along the axial direction of the limiting groove 120. Compared with the existing circular snap ring with a notch, the diameters of the straight section 310 and the arc section 320 of the polygonal snap ring can be made very thin, which not only ensures the effectiveness of the limiting function, but also has the advantage of easy installation. During the assembly process, the operator can manually install the polygonal snap ring in place without any special tooling, which greatly facilitates the installation process and improves the work efficiency.

[0052] Optionally, as Figure 4 shown, in this embodiment, the straight section 310 and the arc section 320 are integrally formed. This integrated design not only reduces the manufacturing process, improves the production efficiency, but also enhances the structural strength of the polygonal snap ring, making it have higher durability and fatigue resistance after being embedded in the annular groove 220.

[0053] Optionally, as Figure 5As shown, the limiting groove 120 includes a first limiting end face 121 and a second limiting end face 122. The straight segment 310 can abut against the first limiting end face 121 or the second limiting end face 122. By providing the first limiting end face 121 and the second limiting end face 122, the sliding stroke of the straight segment 310 in the limiting groove 120 is clearly limited. When the straight segment 310 abuts against the first limiting end face 121, the exhaust cap 200 is closed in place, ensuring sealing performance while not over-compressing the gasket 400, avoiding damage to the gasket 400 and maintaining the sealing performance of the gasket 400. When the straight segment 310 abuts against the second limiting end face 122, the exhaust cap 200 is opened in place, preventing the exhaust cap 200 from falling off the valve seat 100 and ensuring that the exhaust cap 200 does not exceed the predetermined opening or closing position during operation.

[0054] Optionally, the exhaust cap 200 is detachably connected to the valve seat 100. The detachable connection enables the exhaust cap 200 to be easily removed when cleaning, maintenance, or replacement is required, reducing the complexity and workload of maintenance.

[0055] Optionally, an internal thread is provided on the annular side wall of the accommodating cavity 210, and an external thread is provided at the exhaust port end of the valve seat 100. The internal thread and the external thread are screwed together. Through the tight fit of the threads, a reliable seal can be formed between the exhaust cap 200 and the valve seat 100 to prevent gas leakage.

[0056] Optionally, as Figure 6 shown, a vent hole 230 is provided on the side wall of the accommodating cavity 210. One end of the vent hole 230 is communicated with the outside, and the other end is communicated with the exhaust port through the accommodating cavity 210. Thus, when the exhaust cap 200 is opened, gas can quickly enter the accommodating cavity 210 from the exhaust passage 110 and then be discharged from the vent hole 230.

[0057] Embodiment 2

[0058] As Figure 7 shown, this embodiment provides an anti-dropping structure for an exhaust valve, which is basically the same as Embodiment 1. The difference from Embodiment 1 is that the polygonal snap ring is a regular polygonal snap ring. The regular polygonal snap ring includes a plurality of straight segments 310 connected in sequence. The straight segment 310 can slide axially along the limiting groove 120. The connection part between two adjacent straight segments 310 is embedded in the annular clamping groove 220, which can also limit the movement stroke of the exhaust cap 200, ensure the accurate opening and closing positions of the exhaust cap 200, prevent the exhaust cap 200 from being lost, avoid over-compressing the gasket 400, avoid damage to the gasket 400, and improve the sealing effect.

[0059] Specifically, the regular polygonal snap ring can be a regular hexagon snap ring, a regular octagon snap ring, etc., and the number of sides of the regular polygonal snap ring can be adjusted adaptively according to actual needs.

[0060] Embodiment III

[0061] As Figure 8 shown, this embodiment also provides an exhaust valve, which includes the anti-detachment structure of the exhaust cap in any of the above embodiments, effectively preventing the exhaust cap 200 from falling off due to vibration during the operation of the pipeline, and greatly improving the safety of the exhaust valve.

[0062] Optionally, the exhaust valve further includes a valve body assembly 500, a float 600 and a seal 700. An air inlet 511 is provided at the lower end of the valve body assembly 500, and a mounting port is provided at the upper end of the valve body assembly 500. The float 600 is movably disposed in the valve cavity 530 of the valve body assembly 500. The valve seat 100 is installed in the mounting port of the valve body assembly 500. An exhaust passage 110 is provided in the valve seat 100. The seal 700 is located at the air inlet 511 of the exhaust passage 110 and can selectively block or open the air inlet 511 of the exhaust passage 110 under the action of the up and down movement of the float 600. The exhaust cap 200 is threadedly connected to the air outlet of the exhaust passage 110, and the anti-detachment structure is used to prevent the exhaust cap 200 from falling off the valve seat 100.

[0063] Optionally, the valve body assembly 500 includes a valve body 510 and a valve cover 520. The valve cover 520 covers the valve body 510 and encloses a valve cavity 530 with the valve body 510. An air inlet 511 is provided at the lower end of the valve seat 100, and a mounting port is provided on the top side of the valve cover 520. The air inlet 511 is connected to an external pipeline. The valve seat 100 is disposed at the mounting port, and the float 600 and the seal 700 are disposed in the valve cavity 530.

[0064] Optionally, at least one first annular sealing groove 130 is provided on the valve seat 100, and a first sealing ring is provided in the first annular sealing groove 130 for sealing the connection between the valve seat 100 and the valve cover 520. In this embodiment, two first annular sealing grooves 130 are provided on the valve seat 100, and a first sealing ring is provided in each first annular sealing groove 130. The double-sealing structure further improves the sealing effect.

[0065] Optionally, a first limiting platform 521 is provided at the mounting port of the valve cover 520, and a second limiting platform 140 is provided on the valve seat 100. The second limiting platform 140 can abut against the first limiting platform 521 to limit the installation position of the valve seat 100, thereby ensuring the overall assembly accuracy of the exhaust valve. In this embodiment, a second annular sealing groove 150 is further provided on the valve seat 100, and a second sealing ring is provided in the second annular sealing groove 150, and the second sealing ring is clamped between the second limiting platform 140 and the first limiting platform 521. The second sealing ring further improves the sealing effect at the connection between the valve seat 100 and the valve cover 520.

[0066] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Anti-detachment structure of the exhaust cap, characterized in that, Comprising: A valve seat (100), an exhaust passage (110) is provided in the valve seat (100), one end of the exhaust passage (110) is provided with an exhaust port, and an annular limiting groove (120) is provided on the outer wall of the valve seat (100) near the exhaust port end; An exhaust cap (200), an accommodating cavity (210) with an opening is formed inside the exhaust cap (200), the accommodating cavity (210) includes a bottom wall and an annular side wall, and an annular clamping groove (220) opposite to the limiting groove (120) is provided on the inner wall of the annular side wall, and the bottom wall covers the exhaust port to open or close the exhaust port; A limiting member (300), a part of the limiting member (300) is embedded in the annular clamping groove (220), and another part of the limiting member (300) is arranged in the limiting groove (120), and the limiting member (300) can slide axially along the limiting groove (120).

2. The anti-detachment structure of the exhaust cap according to claim 1, wherein The exhaust cap anti-detachment structure further includes a gasket (400), and the gasket (400) is clamped between the bottom wall and the exhaust port.

3. The anti-detachment structure of the exhaust cap according to claim 1, characterized in that, The limiting member (300) is a polygonal snap ring with a notch.

4. The anti-detachment structure of the exhaust cap according to claim 3, characterized in that, The polygonal snap ring includes a straight segment (310) and an arc segment (320), adjacent two straight segments (310) are connected by the arc segment (320), the arc segment (320) is embedded in the annular clamping groove (220), the straight segment (310) is arranged in the limiting groove (120), and can slide axially along the limiting groove (120).

5. The anti-detachment structure of the exhaust cap according to claim 4, wherein, The straight segment (310) and the arc segment (320) are integrally formed.

6. The anti-detachment structure of the exhaust cap according to claim 4, wherein, The limiting groove (120) includes a first limiting end face (121) and a second limiting end face (122), and the straight segment (310) can abut against the first limiting end face (121) or the second limiting end face (122).

7. The anti-detachment structure of the exhaust cap according to claim 3, wherein The limiting member (300) is a regular polygonal snap ring with a notch.

8. The anti-detachment structure of the exhaust cap according to claim 7, characterized in that, The regular polygonal snap ring includes a plurality of straight segments (310) connected in sequence.

9. The anti-detachment structure of the exhaust cap according to any one of claims 1-8, characterized in that, Internal threads are provided on the annular side wall, external threads are provided at the exhaust port end of the valve seat (100), and the internal threads are in threaded connection with the external threads.

10. Exhaust valve, characterized in that, Including the exhaust cap anti-detachment structure according to any one of claims 1-9.

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