Automatic exhaust valve

Abstract

The utility model belongs to the technical field of valve bodies, and relates to an automatic exhaust valve which comprises a valve body, an exhaust valve assembly is installed on a valve deck of the valve body, and the air outlet end of the exhaust valve assembly penetrates through the valve deck and then extends into an inner cavity of the valve body. The air outlet end of the exhaust valve assembly is connected with a lifting hook, a floating ball is hung on the lifting hook, and when the floating ball floats upwards to a limit position, a gap is formed between the top surface of the floating ball and the lower end of the exhaust valve assembly; a filter screen is arranged at the air outlet end of the valve body, and the exhaust valve assembly is a one-way exhaust valve. The exhaust valve is provided with the built-in filter, impurities in a pipeline can be blocked outside the valve, and the impurities are prevented from entering the exhaust valve to cause sealing failure; the automatic exhaust valve is provided with a built-in check valve, and the structure of the automatic exhaust valve does not suck air even when the inlet side of the exhaust valve is at negative pressure; the exhaust port can rotate by 360 degrees and is convenient to mount; and a manual closing function is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve bodies and relates to an automatic exhaust valve. Background Art

[0002] Automatic exhaust valves are used in factory equipment, pump suction side and sealing loops to exhaust gas in the pipeline in time to prevent pipeline circulation blockage, imbalance, noise when the pipeline is running with gas, and vortex phenomenon of the circulating pump. The existing exhaust valve cannot prevent impurities from entering the exhaust valve when working, and the exhaust port cannot rotate, which is inconvenient to install. Summary of the invention

[0003] The utility model aims at solving the above problems and provides an automatic exhaust valve, which can exhaust the gas in the pipeline in time and prevent the vortex cavity phenomenon of the circulation pump.

[0004] According to the technical solution of the utility model: an automatic exhaust valve is characterized in that it includes a valve body, an exhaust valve assembly is installed on the valve cover of the valve body, and the air inlet end of the exhaust valve assembly penetrates the valve cover and then extends into the inner cavity of the valve body;

[0005] The outlet end of the exhaust valve assembly is connected to a hook, and a floating ball is suspended on the hook. When the floating ball floats to the limit position, there is a gap between the top surface of the floating ball and the lower end of the exhaust valve assembly. The floating ball controls the on and off of the air inlet end of the exhaust valve assembly during the lifting process.

[0006] The air inlet end of the valve body is provided with a filter screen, and the exhaust valve assembly is a one-way exhaust valve.

[0007] As a further improvement of the utility model, the exhaust valve assembly includes a valve shaft, the valve shaft is installed through the valve cover, an exhaust valve joint is installed on the valve shaft, a rotating seal is formed between the exhaust valve joint and the valve shaft, and the air outlet of the exhaust valve joint is always connected with the radial air outlet portion of the valve shaft during the rotation process;

[0008] The valve shaft is provided with an axial air passage, and the upper part of the valve shaft is rotatably connected to an adjusting rod, and the adjusting rod can seal the axial air passage;

[0009] A valve flap is arranged at the lower end of the valve shaft extending into the inner cavity of the valve body, and the valve flap is connected to the valve shaft via a limit spring.

[0010] As a further improvement of the utility model, both sides of the radial air outlet of the valve shaft form a dynamic seal with the exhaust valve joint through a first O-ring;

[0011] The radial air outlet portion of the valve shaft includes a radial air outlet and an annular groove, the inner end of the radial air outlet is connected to the axial airway of the valve shaft, the outer end of the radial air outlet is connected to the annular groove, and the outer end of the annular groove is connected to the air outlet of the exhaust valve joint.

[0012] As a further improvement of the utility model, the surface of the adjusting rod is threadedly connected to a butterfly nut, and a second O-ring and a round gasket are arranged on the upper end of the valve shaft. The butterfly nut can press and fix the exhaust valve joint on the valve shaft.

[0013] As a further improvement of the utility model, the valve cover and the valve body are sealed and connected via hexagonal bolts and hexagonal nuts.

[0014] As a further improvement of the utility model, a third O-ring is arranged in the annular groove of the connecting end of the valve body, and the third O-ring realizes the sealing cooperation between the valve cover and the valve body.

[0015] As a further improvement of the utility model, the filter screen is clamped at the air outlet end of the inner cavity of the valve body through a clamping spring.

[0016] As a further improvement of the utility model, a bracket is arranged on the bottom surface of the valve cover, and the bracket is placed on the outside of the valve shaft.

[0017] As a further improvement of the utility model, a limiting bracket is provided on the bottom surface of the valve cover to limit the floating of the float, and the length of the limiting bracket extending in the axial direction is greater than the length of the exhaust valve assembly extending into the valve body.

[0018] The technical effects of the utility model are as follows: the utility model has a built-in filter, which can block impurities in the pipeline on the outside of the valve to prevent the impurities from entering the inside of the exhaust valve and causing sealing failure; the automatic exhaust valve is provided with a built-in check valve, and its structure will not inhale air even when the inlet side of the exhaust valve is under negative pressure; the exhaust port can be rotated 360 degrees, which is easy to install; and it has a manual closing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0021] Figure 1 The valve body 1 includes a valve cover 2, a third O-ring 3, a valve shaft 4, a first O-ring 5, an exhaust valve joint 6, a second O-ring 7, a round gasket 8, a butterfly nut 9, an adjusting rod 10, a hexagonal bolt 11, a hexagonal nut 12, a bracket 13, a valve disc 14, a limit spring 15, a hook 16, a limit bracket 17, a float 18, a retaining ring 19, a filter 20, etc.

[0022] like Figure 1As shown, the utility model is 1. an automatic exhaust valve, characterized in that: it comprises a valve body 1, an exhaust valve assembly is installed on a valve cover 2 of the valve body 1, and an air inlet end of the exhaust valve assembly penetrates the valve cover 2 and then extends into the inner cavity of the valve body 1;

[0023] The outlet end of the exhaust valve assembly is connected to a hook 16, and a float 18 is suspended on the hook 16. When the float 18 floats to the limit position, there is a gap between the top surface of the float 18 and the lower end of the exhaust valve assembly. The float 18 controls the on-off of the inlet end of the exhaust valve assembly during the lifting process.

[0024] A filter screen 20 is provided at the air inlet end of the valve body 1, and the exhaust valve assembly is a one-way exhaust valve.

[0025] The exhaust valve assembly includes a valve shaft 4, which is installed on the valve cover 2 through the valve shaft 4, and an exhaust valve connector 6 is installed on the valve shaft 4, and a rotating seal is formed between the exhaust valve connector 6 and the valve shaft 4, and the air outlet of the exhaust valve connector 6 is always connected with the radial air outlet portion of the valve shaft 4 during the rotation process;

[0026] The valve shaft 4 is provided with an axial air passage, and the upper part of the valve shaft 4 is rotatably connected to the regulating rod 10, and the regulating rod 10 can seal the axial air passage;

[0027] A valve flap 14 is arranged at the lower end of the valve shaft 4 extending into the inner cavity of the valve body 1, and the valve flap 14 is connected to the valve shaft 4 via a limit spring 15. During operation, when the pressure in the valve cavity of the valve body 1 rises, the float 18 drops along with the water level, driving the valve flap 14 to open the air inlet of the valve shaft 4, so that the gas can be discharged from the axial airway of the valve shaft 4.

[0028] Dynamic seals are formed between the first O-ring 5 and the exhaust valve connector 6 on both sides of the radial outlet of the valve shaft 4;

[0029] The radial air outlet portion of the valve shaft 4 includes a radial air outlet and an annular groove. The inner end of the radial air outlet is connected to the axial air passage of the valve shaft 4, the outer end of the radial air outlet is connected to the annular groove, and the outer end of the annular groove is connected to the air outlet of the exhaust valve joint 6.

[0030] The surface of the adjusting rod 10 is threadedly connected to the butterfly nut 9, and the upper end of the valve shaft 4 is provided with a second O-ring 7 and a round gasket 8. The butterfly nut 9 can press and fix the exhaust valve connector 6 on the valve shaft 4. In actual use, the butterfly nut 9 can be loosened according to installation needs, and the exhaust valve connector 6 can be rotated 360 degrees at this time to facilitate the connection between the exhaust valve connector 6 and the external components, and then the exhaust valve connector 6 is locked and fixed on the valve shaft 4 by the butterfly nut 9.

[0031] The valve cover 2 and the valve body 1 are sealed and connected via a hexagonal bolt 11 and a hexagonal nut 12 .

[0032] A third O-ring 3 is arranged in the annular groove of the connecting end of the valve body 1 , and the third O-ring 3 realizes the sealing cooperation between the valve cover 2 and the valve body 1 .

[0033] The filter screen 20 is clamped at the air outlet end of the inner cavity of the valve body 1 through the clamping spring 19 .

[0034] A bracket 13 is provided on the bottom surface of the valve cover 2 , and the bracket 13 is placed on the outside of the valve shaft 4 .

[0035] A limiting bracket 17 is disposed on the bottom surface of the valve cover 2 to limit the floating of the float ball 18 , and the axially extending length of the limiting bracket 17 is greater than the length of the exhaust valve assembly extending into the valve body 1 .

[0036] It can be understood that the connecting end of the valve body 1 is configured with external threads to achieve connection during use.

[0037] like Figure 1 As shown, when the utility model is in use, when gas enters the valve cavity of the valve body 1, it gathers at the upper part of the valve body 1. As the gas in the valve increases, the pressure rises. When the gas pressure is greater than the system pressure, the gas will cause the water level in the cavity to drop, and the float 18 will drop along with the water level. The regulating rod 10 is rotated to open the exhaust port. After the gas is exhausted, the water level rises, and the float 18 also rises accordingly. The regulating rod 10 is rotated to close the exhaust port.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and improved concept of the present invention, which should be included in the protection scope of the present invention.

Claims

1. An automatic exhaust valve, characterized in that: It comprises a valve body (1), a valve cover (2) of the valve body (1) having an exhaust valve assembly mounted thereon, an air inlet end of the exhaust valve assembly penetrating the valve cover (2) and extending into the inner cavity of the valve body (1); The outlet end of the exhaust valve assembly is connected to a hook (16), a floating ball (18) is suspended on the hook (16), and when the floating ball (18) floats up to an extreme position, a distance is provided between the top surface of the floating ball (18) and the lower end of the exhaust valve assembly, and the floating ball (18) controls the on-off of the air inlet end of the exhaust valve assembly during the lifting process; The air inlet end of the valve body (1) is provided with a filter screen (20), and the exhaust valve assembly is a one-way exhaust valve.

2. The automatic exhaust valve according to claim 1, characterized in that: The exhaust valve assembly comprises a valve shaft (4), the valve shaft (4) being installed through the valve cover (2), an exhaust valve connector (6) being installed on the valve shaft (4), a rotating seal being formed between the exhaust valve connector (6) and the valve shaft (4), and an air outlet of the exhaust valve connector (6) being always in communication with a radial air outlet portion of the valve shaft (4) during rotation; The valve shaft (4) is provided with an axial air passage, and the upper part of the valve shaft (4) is rotatably connected to the regulating rod (10), and the regulating rod (10) is capable of sealing the axial air passage; A valve flap (14) is provided at the lower end of the valve shaft (4) extending into the inner cavity of the valve body (1), and the valve flap (14) and the valve shaft (4) are connected via a limit spring (15).

3. The automatic exhaust valve according to claim 2, characterized in that: Dynamic seals are formed between the first O-ring (5) and the exhaust valve connector (6) on both sides of the radial air outlet of the valve shaft (4); The radial air outlet portion of the valve shaft (4) comprises a radial air outlet and an annular groove, the inner end of the radial air outlet being connected to the axial air passage of the valve shaft (4), the outer end of the radial air outlet being connected to the annular groove, and the outer end of the annular groove being connected to the air outlet of the exhaust valve joint (6).

4. The automatic exhaust valve according to claim 2, characterized in that: The surface of the regulating rod (10) is threadedly connected to a butterfly nut (9), and a second O-ring (7) and a round gasket (8) are provided on the upper end of the valve shaft (4). The butterfly nut (9) can press and fix the exhaust valve joint (6) onto the valve shaft (4).

5. The automatic exhaust valve according to claim 1, characterized in that: The valve cover (2) and the valve body (1) are sealedly connected via a hexagonal bolt (11) and a hexagonal nut (12).

6. The automatic exhaust valve according to claim 5, characterized in that: A third O-ring (3) is arranged in the annular groove of the connecting end of the valve body (1), and the third O-ring (3) realizes sealing cooperation between the valve cover (2) and the valve body (1).

7. The automatic exhaust valve according to claim 1, characterized in that: The filter screen (20) is clamped to the air outlet end of the inner cavity of the valve body (1) via a clamping spring (19).

8. The automatic exhaust valve according to claim 2, characterized in that: A bracket (13) is provided on the bottom surface of the valve cover (2), and the bracket (13) is placed on the outside of the valve shaft (4).

9. The automatic exhaust valve according to claim 1, characterized in that: A limiting bracket (17) is provided on the bottom surface of the valve cover (2) to limit the floating of the float ball (18), and the length of the limiting bracket (17) extending in the axial direction is greater than the length of the exhaust valve assembly extending into the valve body (1).

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