Exhaust valve

Abstract

The invention relates to an exhaust valve which comprises an air valve shell and an exhaust cover matched with the air valve shell, and is characterized in that an exhaust hole is formed in the exhaust cover, the exhaust valve further comprises a valve cover arranged on the upper side of the exhaust cover, an exhaust hole communicated with an exhaust port of the exhaust cover is formed in the valve cover, the valve cover further comprises a wrapping cavity, and the wrapping cavity is communicated with the exhaust port of the exhaust cover. A valve rod and an exhaust nozzle are arranged in the wrapping cavity, the valve rod is in sealing fit with the wrapping cavity and can move in the wrapping cavity, the exhaust hole is opened when the valve rod moves to the position away from the exhaust hole, and the exhaust hole is closed when the valve rod blocks the exhaust port. The position of the valve rod can be adjusted by rotating the screw. According to the novel exhaust valve, the valve rod is of a double-sealing structure, and the sealing performance is good; by adjusting the position of the valve rod, lateral exhaust of the exhaust valve can be achieved, and the problem of exhaust water leakage is solved.

Description

Technical Field

[0001] The invention relates to an exhaust valve, in particular to a side exhaust valve. Background Art

[0002] In water-based closed systems such as heating, cooling, etc. (such as EN12828), an exhaust valve is required to automatically exhaust the air (bubbles) in the hot (cold) medium in the system to improve the heat (cold) efficiency, reduce oxidation corrosion in the system, and reduce noise. However, during this working process, the medium in the system will flow out from the screw cap due to the pressure in the pipeline, resulting in water leakage. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an exhaust valve.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] An exhaust valve comprises an exhaust valve housing and an exhaust cover matched with the exhaust valve housing, characterized in that: the exhaust cover is provided with an exhaust hole, and also comprises a valve cover arranged on the upper side of the exhaust cover, the valve cover is provided with an exhaust hole communicating with the exhaust port of the exhaust cover, the valve cover also comprises a covering cavity, a valve stem and an exhaust nozzle are arranged in the covering cavity, and also comprises a screw arranged at the other end of the valve stem and connected to the valve stem, the valve stem is sealed and matched with the covering cavity and can move in the covering cavity, when the valve stem moves to a position away from the exhaust hole, the exhaust hole is opened, and when the valve stem blocks the exhaust port, the exhaust hole is closed, and the position of the valve stem can be adjusted by rotating the screw.

[0006] Furthermore, two first O-rings are provided on the valve stem to prevent gas from leaking toward the screw.

[0007] Furthermore, a third O-ring is provided on the valve stem to prevent gas from leaking toward the exhaust nozzle. When the exhaust hole is closed, the first O-ring and the third O-ring are located on both sides of the exhaust hole.

[0008] Furthermore, on the screw side, a retaining spring installation position is provided inside the covering cavity, and a first retaining spring is provided inside the retaining spring to prevent the valve stem structure from falling out.

[0009] Furthermore, a second O-ring is provided between the exhaust nozzle and the covering cavity on the exhaust nozzle side. The O-ring is coated with silicone oil, which helps to better prevent the medium from flowing out of the valve housing. The exhaust valve can be exhausted from the side, solving the problem of exhaust leakage.

[0010] Furthermore, a float with a groove is provided in the air valve housing, the upper end of the float is assembled on the lower end of a stainless steel connecting rod, and the upper end of the stainless steel connecting rod is assembled with an exhaust cover.

[0011] Furthermore, a fourth O-ring is provided in the groove on the upper side of the exhaust cover to form a seal with the valve cover, and a fifth O-ring is provided at the joint between the exhaust cover and the valve housing.

[0012] Furthermore, the exhaust cover is provided with an exhaust port, and the valve cover is provided with an exhaust hole, and the exhaust hole is not in contact with the exhaust port. After assembly, the valve cover presses the exhaust cover, and due to the effect of the fourth O-ring, a closed space is formed between the valve cover and the exhaust cover on the inner side of the fourth O-ring, and the gas in between can only be discharged to the outside through the exhaust hole. This method makes it unnecessary to excessively consider the communication and coordination between the exhaust port and the exhaust hole during the manufacturing or assembly process between the valve cover and the exhaust cover.

[0013] Furthermore, a circular buckle hole is provided at the upper end of the stainless steel connecting rod, which can match the connecting column provided at the lower end of the exhaust cover. The circular buckle hole provided at the upper end of the stainless steel connecting rod is rotated through the connecting column provided at the lower end of the exhaust cover.

[0014] Furthermore, an air path channel cavity is provided at the lower portion of the exhaust cover, and one side of the entrance of the air path channel cavity is rotatably connected to the upper end of a stainless steel connecting rod, and a rubber gasket is installed on the portion of the stainless steel connecting rod near the upper end. As the stainless steel connecting rod rotates upward, the rubber gasket presses the entrance of the air path channel cavity, so that the entrance of the air path channel cavity is closed. Conversely, when the stainless steel connecting rod rotates downward, the air path channel cavity is opened.

[0015] Furthermore, a barb is provided at the upper end of the float, and the barb provided at the upper end of the float is hung on the lower end of the stainless steel connecting rod.

[0016] Furthermore, a nut is provided at the lower end of the shell, and a second retaining spring is provided between the nut and the protruding end of the air valve shell.

[0017] Furthermore, the nut is a movable connecting nut, which can conveniently adjust the exhaust direction of the exhaust valve.

[0018] Furthermore, glue is applied at the threaded connection between the valve cover and the air valve housing.

[0019] Furthermore, the grooves on the surface of the float are arranged in multiple rows horizontally and vertically, and the float is designed as a hollow diversion. The hollow diversion design means that the inside of the float is a hollow structure, and diversion holes are arranged on both sides of the top of the float.

[0020] Furthermore, the screw is provided with knurling to prevent slipping during installation and use; when installing after the knurling, no tools are required and installation and assembly can be performed directly by hand, thus preventing slipping during installation and use.

[0021] Furthermore, the valve stem is provided with a groove, and the O-ring is installed in the groove to form a double-sided seal with the valve cover, and the sealing performance is good.

[0022] The present invention provides a new type of exhaust valve, the valve stem is a double sealing structure, and the sealing performance is good; by adjusting the position of the valve stem, the gas in the valve can be discharged. The screws are knurled to facilitate installation and assembly; the float is a hollow structure to save materials, and the surface of the float is provided with grooves, which are not easy to adsorb on the inner surface of the shell. The middle of the float adopts a hollow diversion design to facilitate gas flow and also buffer the gas that enters instantly; there is a horizontal air outlet on the valve cover, which can realize the side exhaust of the exhaust valve and solve the problem of exhaust leakage. The nut is a movable connecting nut, and different exhaust directions can be selected according to needs during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional view of the planar structure of the present invention.

[0024] Figure 2 It is a schematic cross-sectional view of the float of the present invention.

[0025] Figure 3 It is a schematic cross-sectional view of the planar structure of the automatic exhaust state of the present invention. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] A kind of exhaust valve comprises an air valve housing 15 and an exhaust cover 11 matched with the air valve housing 15, characterized in that: the exhaust cover 11 is provided with an exhaust port 21, and also comprises a valve cover 6 arranged on the upper side of the exhaust cover 11, the valve cover 6 is provided with an exhaust hole 20 communicating with the exhaust port 21 of the exhaust cover, the valve cover 6 also comprises a covering cavity, a valve stem 4 and an exhaust nozzle 8 are arranged in the covering cavity, and also comprises a screw 1 connected to the valve stem 4 at the other end of the valve stem 4, the valve stem 4 is sealed with the covering cavity and can move in the covering cavity, when the valve stem 4 moves to a position away from the exhaust hole, the exhaust hole is opened, when the valve stem 4 blocks the exhaust port, the exhaust hole is closed, and the position adjustment of the valve stem 4 can be achieved by rotating the screw 1.

[0028] The valve stem 4 is provided with two first O-rings 3 to prevent gas from leaking toward the screw 1 .

[0029] The valve stem is also provided with a third O-ring 5 to prevent gas from leaking toward the exhaust nozzle 8. When the exhaust hole is closed, the first O-ring 3 and the third O-ring 5 are located on both sides of the exhaust hole.

[0030] On the screw 1 side, a retaining spring installation position is arranged inside the covering cavity, and a retaining spring installation groove is also arranged on the valve stem, in which a first retaining spring 2 is arranged to prevent the valve stem 4 structure from falling out.

[0031] On the exhaust nozzle 8 side, a second O-ring 7 is provided between the exhaust nozzle 8 and the covering cavity. The O-ring is coated with silicone oil, which helps to better prevent the medium from flowing out of the valve housing. The exhaust valve can be exhausted from the side, solving the problem of exhaust leakage.

[0032] A float 14 with a groove is disposed in the air valve housing 15 . The upper end of the float 14 is assembled to the lower end of a stainless steel connecting rod 13 . The upper end of the stainless steel connecting rod 13 is assembled to the exhaust cover 11 .

[0033] A fourth O-ring 9 is disposed in the groove on the upper side of the exhaust cover 11 to form a seal with the valve cover 6 . A fifth O-ring 10 is disposed at the joint between the exhaust cover 11 and the valve housing 15 .

[0034] The exhaust cover is provided with an exhaust port 21, and the valve cover 6 is provided with an exhaust hole 20, and the exhaust hole 20 is not in contact with the exhaust port 21. After assembly, the valve cover presses the exhaust cover, and due to the effect of the fourth O-ring 9, a closed space is formed between the valve cover 6 and the exhaust cover 11 inside the fourth O-ring 9, and the gas in between can only be discharged to the outside through the exhaust hole 20. This method makes it unnecessary to excessively consider the communication and coordination between the exhaust port and the exhaust hole during the manufacturing or assembly process between the valve cover and the exhaust cover.

[0035] The upper end of the stainless steel connecting rod 13 is provided with a circular buckle hole that can match the connecting column provided at the lower end of the exhaust cover 11. The circular buckle hole provided at the upper end of the stainless steel connecting rod 13 is rotated by the connecting column provided at the lower end of the exhaust cover 11.

[0036] A barb is provided at the upper end of the buoy 14 , and the barb provided at the upper end of the buoy is hung on the lower end of the stainless steel connecting rod 13 .

[0037] An air path passage cavity 22 is provided at the lower portion of the exhaust cover 11, and one side of the entrance of the air path passage cavity 22 is rotatably connected to the upper end of the stainless steel connecting rod 13. A rubber gasket 12 is installed on the portion of the stainless steel connecting rod 13 near the upper end. As the stainless steel connecting rod 13 rotates upward, the rubber gasket 12 presses the entrance of the air path passage cavity 22, so that the entrance of the air path passage cavity 22 is closed.

[0038] A nut 17 is disposed at the lower end of the air valve housing 15 , and a retaining spring 16 is disposed inside the nut 17 .

[0039] Nut 17 is a movable connecting nut, which can conveniently adjust the exhaust direction of the exhaust valve.

[0040] The threaded connection between the valve cover 6 and the air valve housing 15 is coated with glue.

[0041] The grooves on the surface of the buoy 14 are arranged in multiple rows horizontally and vertically, and the buoy is designed as a hollow diversion. The hollow diversion design means that the inside of the buoy is a hollow structure, and diversion holes are arranged on both sides of the top of the buoy.

[0042] The screw 1 is provided with knurling to prevent slipping during installation and use; when installing after the knurling, no tools are needed, and installation and assembly can be performed directly by hand, thus preventing slipping during installation and use.

[0043] The valve stem 4 is provided with a groove, and the O-ring is installed in the groove to form a double-sided seal with the valve cover, and the sealing performance is good.

[0044] In summary, the valve stem of the technical solution proposed by the present invention has a double sealing structure with good sealing performance; the new exhaust port and exhaust hole match greatly reduce the machining standards and assembly difficulty, and the gas in the valve can be discharged by adjusting the position of the valve stem. There is a horizontal air outlet on the valve cover, which can realize the side exhaust of the exhaust valve and solve the problem of exhaust leakage. The nut is a movable connecting nut, and different exhaust directions can be selected according to needs during use.

[0045] 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 replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An exhaust valve, comprising an exhaust valve housing and an exhaust cover matched with the exhaust valve housing, characterized in that: The exhaust cover is provided with an exhaust hole and also includes a valve cover arranged on the upper side of the exhaust cover, the valve cover is provided with an exhaust hole communicated with the exhaust port of the exhaust cover, the valve cover also includes a covering cavity, a valve stem and an exhaust nozzle are arranged in the covering cavity, and also includes a screw arranged at the other end of the valve stem and connected to the valve stem, the valve stem is sealed with the covering cavity and can move in the covering cavity, when the valve stem moves to a position away from the exhaust hole, the exhaust hole is opened, when the valve stem blocks the exhaust port, the exhaust hole is closed, and the position of the valve stem can be adjusted by rotating the screw.

2. An exhaust valve according to claim 1, characterized in that: The valve stem is provided with two first O-type sealing rings to prevent gas from leaking toward the screw.

3. An exhaust valve according to claim 1, characterized in that: The valve stem is also provided with a third O-ring to prevent gas from leaking toward the exhaust nozzle. When the exhaust hole is closed, the first O-ring and the third O-ring are located on both sides of the exhaust hole.

4. An exhaust valve according to claim 1, characterized in that: On the screw side, a retaining spring installation position is arranged inside the covering cavity, and a first retaining spring is arranged inside the retaining spring installation position.

5. An exhaust valve according to claim 1, characterized in that: On the exhaust nozzle side, a second O-type sealing ring is arranged between the exhaust nozzle and the covering cavity, and silicone oil is coated on the O-type sealing ring.

6. An exhaust valve according to claim 1, characterized in that: A nut is provided at the lower end of the air valve housing, and a second clamping spring is provided between the nut and the protruding end of the air valve housing.

7. An exhaust valve according to claim 6, characterized in that: The nut is a movable connecting nut.

8. An exhaust valve according to claim 1, characterized in that: A fourth O-ring is provided in the groove on the upper side of the exhaust cover to form a seal with the valve cover. A fifth O-ring is provided at the joint between the exhaust cover and the valve housing. The exhaust hole is not in contact with the exhaust port. After assembly, the valve cover presses the exhaust cover. Due to the action of the fourth O-ring, a closed space is formed between the valve cover and the exhaust cover on the inner side of the fourth O-ring, and the gas in between can only be discharged outward through the exhaust hole.

9. An exhaust valve according to claim 1, characterized in that: The screw is provided with knurling.

10. An exhaust valve according to claim 1, characterized in that: The valve stem is provided with a groove, and the O-ring is installed in the groove to form a double-sided seal with the valve cover, with good sealing performance.

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