Automatic exhaust valve

Abstract

The utility model relates to the technical field of exhaust valves, in particular to an automatic exhaust valve which structurally comprises a valve cover, a valve body located below the valve cover, a valve cavity formed between the valve cover and the valve body, a valve element arranged on the top of the valve cover in a penetrating mode, a fixing ring arranged on the outer side of the valve element on the valve cover, a valve bonnet movably sleeved on the fixing ring and an exhaust pipe arranged on the valve bonnet. By means of the manual exhaust mechanism, when the automatic exhaust hole is blocked or the floating ball mechanism breaks down, gas cannot be exhausted through the automatic exhaust hole, the operation screw is pressed downwards, the automatic exhaust hole is opened, the automatic exhaust hole is opened, and the automatic exhaust hole is closed. And at the moment, the abutting block is separated from the bottom of the limiting step, a fluid medium in the valve cavity can flow towards the exhaust pipe through the manual exhaust hole and a gap between the limiting step and the operation screw rod and is exhausted, and therefore normal operation of an exhaust valve system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust valves, in particular to an automatic exhaust valve. Background Art

[0002] The exhaust valve is used for exhaust of pipelines in independent heating systems, central heating systems, heating boilers, central air conditioners, floor heating and solar heating systems;

[0003] The patent document with the patent number CN201866387U discloses an exhaust valve, in which a housing is screwed to a valve cover, a threaded hole in the middle of the valve cover is screwed to a valve core, a valve seat welded at the lower part of the housing is screwed to a pipeline, a valve core is screwed to an exhaust nozzle, an exhaust hole is provided inside the valve core and the exhaust nozzle, and a floating ball is provided inside the housing, and the valve is characterized in that a floating rod is movably installed in the exhaust hole at the lower end of the valve core, and an inner port of the valve core is provided at the inner upper part of the exhaust hole at the lower end of the valve core;

[0004] In the process of actual application, it still has the following shortcomings: the traditional exhaust valve uses the floating ball to float up to drive the floating rod to move up to isolate the connection between the exhaust hole and the inner cavity of the shell. When the automatic exhaust hole is blocked or the float mechanism fails, the exhaust valve cannot exhaust normally, and the pressure in the pipeline continues to increase, which may cause abnormal operation or even damage to the system. Utility Model Content

[0005] The utility model provides an automatic exhaust valve, which can effectively solve the above problems.

[0006] The utility model is achieved in this way:

[0007] An automatic exhaust valve, the structure of which comprises: a valve cover, a valve body under the valve cover, a valve cavity formed between the valve cover and the valve body, a valve core penetrating the top of the valve cover, a fixing ring provided on the outer side of the valve core on the valve cover, a valve cap provided on the movable sleeve of the fixing ring, an exhaust pipe provided on the valve cap, an automatic exhaust hole provided in the valve core, the upper and lower ends of the automatic exhaust hole are respectively connected with the exhaust pipe and the valve cavity, a floating ball mechanism for opening and closing the automatic exhaust hole is provided in the valve cavity, a manual exhaust hole is also provided in the valve core, the upper and lower ends of the manual exhaust hole are respectively connected with the exhaust pipe and the valve cavity, and a manual exhaust mechanism is provided in the manual exhaust hole;

[0008] The manual exhaust mechanism includes an operating screw that is arranged in a manual exhaust hole and can slide up and down. A top block is provided at the bottom of the operating screw. A limiting step is formed in the manual exhaust hole for limiting the sliding position of the top block. A hexagonal nut is threaded on the operating screw. The manual exhaust hole on the limiting step is formed with a guide groove for the hexagonal nut to slide up and down. A spring is provided between the limiting step and the hexagonal nut and is sleeved on the outside of the operating screw.

[0009] As a further improvement, a plurality of first positioning blocks and second positioning blocks are respectively distributed in a ring shape outside the fixing ring, the first positioning blocks and the second positioning blocks are arranged up and down, and a fixed stop bar is provided at the bottom of the valve cap.

[0010] As a further improvement, the abutting block is further provided with a first sealing ring sleeved on the operating screw.

[0011] As a further improvement, a convex edge extending outward is formed at the bottom of the valve core, the convex edge is arranged below the valve cover, and the fixing ring is connected to the valve core by threads.

[0012] As a further improvement, a second sealing ring is sleeved on the valve core, and the second sealing ring is located between the valve cover and the convex edge.

[0013] As a further improvement, the float mechanism includes a guide rod slidably connected to the automatic exhaust hole, a float is provided at the bottom of the guide rod, and a rubber pad for blocking the automatic exhaust hole is provided on the guide rod.

[0014] The beneficial effects of the utility model are:

[0015] The utility model is provided with a manual exhaust mechanism. When the automatic exhaust hole is blocked or the float mechanism fails so that the gas cannot be discharged through the automatic exhaust hole, the operating screw is pressed downward, thereby driving the hexagonal nut to move downward along the guide groove and squeeze the spring. At this time, the top block is separated from the bottom of the limiting step, and the fluid medium in the valve cavity can flow to the exhaust pipe and be discharged through the manual exhaust hole and the gap between the limiting step and the operating screw, thereby ensuring the normal operation of the exhaust valve system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a structural schematic diagram of an automatic exhaust valve provided by the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve cover and valve body provided by the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the valve cap provided by the utility model;

[0020] Figure 4It is a structural schematic diagram of the valve core, fixed ring and float mechanism provided by the utility model;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the valve core provided by the utility model;

[0022] Figure 6 It is a structural schematic diagram of the manual exhaust opening and closing states provided by the utility model.

[0023] In the figure: valve cover-1, valve body-2, valve core-3, fixing ring-4, valve cap-5, exhaust pipe-51, automatic exhaust hole-31, manual exhaust hole-32, manual exhaust mechanism-6, operating screw-61, top block-62, limiting step-33, hexagonal nut-63, guide groove-34, spring-64, first positioning block-41, second positioning block-42, fixed gear strip-52, first sealing ring-65, flange-35, second sealing ring-36, guide rod-71, float-72, rubber pad-73. DETAILED DESCRIPTION

[0024] In order to make the embodiments of the utility model, all belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but only represents the selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] The existing exhaust valve uses the floating ball to float up to drive the floating rod to move up to cut off the connection between the exhaust hole and the inner cavity of the shell. When the automatic exhaust hole is blocked or the floating ball mechanism fails, the exhaust valve cannot exhaust normally, and the pressure in the pipeline continues to increase, which may cause abnormal operation or even damage of the system. In order to solve the above technical problems, this case proposes the following technical solutions:

[0027] Reference Figures 1 to 6 As shown, an automatic exhaust valve, the structure of which includes: a valve cover 1, a valve body 2 under the valve cover 1, a valve cavity formed between the valve cover 1 and the valve body 2, a valve core 3 is penetrated through the top of the valve cover 1, a fixing ring 4 is provided on the outer side of the valve core 3 on the valve cover 1, a valve cap 5 is movably sleeved on the fixing ring 4, an exhaust pipe 51 is provided on the valve cap 5, an automatic exhaust hole 31 is provided in the valve core 3, the upper and lower ends of the automatic exhaust hole 31 are respectively communicated with the exhaust pipe 51 and the valve cavity, a float mechanism for opening and closing the automatic exhaust hole 31 is provided in the valve cavity, a manual exhaust hole 32 is also provided in the valve core 3, the upper and lower ends of the manual exhaust hole 32 are respectively communicated with the exhaust pipe 51 and the valve cavity, and a manual exhaust mechanism 6 is provided in the manual exhaust hole 32;

[0028] The manual exhaust mechanism 6 includes an operating screw 61 which is arranged in the manual exhaust hole 32 and can slide up and down. A top block 62 is provided at the bottom of the operating screw 61. A limiting step 33 for slidingly limiting the top block 62 is formed in the manual exhaust hole 32. A hexagonal nut 63 is screwed on the operating screw 61. The manual exhaust hole 32 on the limiting step 33 is formed with a guide groove 34 for the hexagonal nut 63 to slide up and down. A spring 64 is provided between the limiting step 33 and the hexagonal nut 63 and is sleeved on the outside of the operating screw 61.

[0029] The bottom of the valve body 2 is provided with an inlet for medium to flow into and communicate with the valve cavity. When in use, the liquid medium enters the valve cavity through the inlet, and the automatic exhaust hole 31 is closed by the float mechanism. When there is no liquid medium in the valve cavity, the float mechanism opens the automatic exhaust hole 31, so that the gas entering the valve cavity through the inlet flows to the exhaust pipe 51 through the automatic exhaust hole 31 and is discharged;

[0030] Furthermore, the diameter of the operating screw 61 is smaller than the inner diameters of the manual exhaust hole 32 and the limiting step 33, and the diameter of the abutting block 62 is larger than the inner diameter of the bottom of the limiting step 33;

[0031] In the natural state, the spring 64 expands and drives the operating screw 61 to move upward, so that the push block 62 is close to the limit step 33, thereby blocking the manual exhaust hole 32 to prevent the fluid medium in the valve cavity from overflowing; when the automatic exhaust hole 31 is blocked or the float mechanism fails and the gas cannot be discharged through the automatic exhaust hole 31, the operating screw 61 is pressed downward, thereby driving the hexagonal nut 63 to move downward along the guide groove 34 and squeeze the spring 64. At this time, the push block 62 is separated from the bottom of the limit step 33, and the fluid medium in the valve cavity can flow to the exhaust pipe 51 and be discharged through the manual exhaust hole 32 and the gap between the limit step 33 and the operating screw 61, thereby ensuring the normal operation of the exhaust valve system.

[0032] Among them, a plurality of first positioning blocks 41 and second positioning blocks 42 are respectively distributed in a ring shape outside the fixing ring 4, and the first positioning blocks 41 and the second positioning blocks 42 are arranged up and down. A fixed bar 52 is provided at the bottom of the valve cap 5. Under normal conditions, the fixed bar 52 is buckled with the second positioning block 42, so as to limit and fix the valve cap 5. When manual exhaust is required, the valve cap 5 is pressed to cause the fixed bar 52 to buckle with the first positioning block 41. At this time, the bottom of the valve cap 5 is in close contact with the operating screw 61 and drives the operating screw 61 to move downward, thereby realizing manual exhaust.

[0033] In order to ensure the sealing performance of the manual exhaust hole 32 during use, the push-up block 62 is also provided with a first sealing ring 65 which is sleeved on the operating screw 61. Under normal conditions, the push-up block 62, under the action of the spring 64, pushes the first sealing ring 65 to press against the bottom of the limiting step 33, thereby preventing the fluid medium in the valve cavity from leaking through the manual exhaust hole 32. During the manual exhaust process, the first sealing ring 65 moves downward with the operating screw 61, so that the air in the valve cavity is discharged through the manual exhaust hole 32.

[0034] In order to facilitate the disassembly and maintenance of the valve core 3, a convex edge 35 extending outward is formed at the bottom of the valve core 3, and the convex edge 35 is arranged below the valve cover 1. The fixing ring 4 and the valve core 3 are threadedly connected. When in use, the upper and lower ends of the valve cover 1 are respectively close to the bottom surface of the fixing ring 4 and the top of the convex edge 35, and the valve core 3 and the fixing ring 4 are detachably connected, which is convenient for the inspection and maintenance of the exhaust valve.

[0035] Furthermore, in order to improve the sealing performance of the exhaust valve, a second sealing ring 36 is sleeved on the valve core 3, and the second sealing ring 36 is located between the valve cover 1 and the convex edge 35 to prevent the fluid medium in the valve cavity from leaking through the gap between the valve core 3 and the valve cover 1.

[0036] Specifically, the float mechanism includes a guide rod 71 slidably connected to the automatic exhaust hole 31, a float 72 is provided at the bottom of the guide rod 71, and a rubber pad 73 is provided on the guide rod 71 for blocking the automatic exhaust hole 31. The diameter of the rubber pad 73 is larger than the bottom diameter of the automatic exhaust hole 31. Therefore, when the liquid medium enters the valve cavity through the inlet, the liquid medium pushes the float 72 to rise, and the guide rod 71 moves up along the automatic exhaust hole 31. At the same time, the rubber pad 73 is close to the bottom of the automatic exhaust hole 31, thereby preventing the fluid medium in the valve cavity from being discharged through the automatic exhaust hole 31; when there is no liquid medium in the valve cavity, the float 72 moves downward under the action of gravity, and at the same time, the rubber pad 73 is separated from the automatic exhaust hole 31, and the gas can be discharged through the automatic exhaust hole 31.

[0037] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic exhaust valve, the structure of which comprises: A valve cover (1), a valve body (2) located below the valve cover (1), a valve cavity formed between the valve cover (1) and the valve body (2), characterized in that: a valve core (3) is provided through the top of the valve cover (1), a fixing ring (4) is provided on the outer side of the valve core (3) on the valve cover (1), a valve cap (5) is movably sleeved on the fixing ring (4), an exhaust pipe (51) is provided on the valve cap (5), an automatic exhaust hole (31) is provided in the valve core (3), the upper and lower ends of the automatic exhaust hole (31) are respectively connected to the exhaust pipe (51) and the valve cavity, a floating ball mechanism for opening and closing the automatic exhaust hole (31) is provided in the valve cavity, a manual exhaust hole (32) is also provided in the valve core (3), the upper and lower ends of the manual exhaust hole (32) are respectively connected to the exhaust pipe (51) and the valve cavity, and a manual exhaust mechanism (6) is provided in the manual exhaust hole (32); The manual exhaust mechanism (6) comprises an operating screw (61) which is arranged in a manual exhaust hole (32) and can slide up and down. A resisting block (62) is arranged at the bottom of the operating screw (61). A limiting step (33) for limiting the sliding position of the resisting block (62) is formed in the manual exhaust hole (32). A hexagonal nut (63) is screwed on the operating screw (61). The manual exhaust hole (32) on the limiting step (33) is formed with a guide groove (34) for the hexagonal nut (63) to slide up and down. A spring (64) which is sleeved on the outside of the operating screw (61) is arranged between the limiting step (33) and the hexagonal nut (63).

2. An automatic exhaust valve according to claim 1, characterized in that: A plurality of first positioning blocks (41) and second positioning blocks (42) are respectively distributed in an annular shape outside the fixing ring (4), the first positioning blocks (41) and the second positioning blocks (42) are arranged up and down, and a fixing bar (52) is provided at the bottom of the valve cap (5).

3. An automatic exhaust valve according to claim 2, characterized in that: The abutting block (62) is also provided with a first sealing ring (65) sleeved on the operating screw rod (61).

4. An automatic exhaust valve according to claim 3, characterized in that: The bottom of the valve core (3) is formed with a convex edge (35) extending outwards, and the convex edge (35) is arranged below the valve cover (1). The fixing ring (4) and the valve core (3) are connected by threads.

5. An automatic exhaust valve according to claim 4, characterized in that: The valve core (3) is sleeved with a second sealing ring (36), and the second sealing ring (36) is located between the valve cover (1) and the convex edge (35).

6. An automatic exhaust valve according to any one of claims 1 to 5, characterized in that: The float mechanism comprises a guide rod (71) slidably connected to the automatic exhaust hole (31), a float (72) is provided at the bottom of the guide rod (71), and a rubber pad (73) for blocking the automatic exhaust hole (31) is provided on the guide rod (71).

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