Pneumatic control reversing valve capable of automatically compensating air pressure

Abstract

The utility model relates to the technical field of reversing valves, and discloses a pneumatic control reversing valve capable of automatically compensating air pressure, which comprises a lower shell, output ports are arranged on the left side and the right side of the front end of the lower shell, an air inlet is arranged in the middle of the rear end of the lower shell, and exhaust ports are arranged on the left side and the right side of the rear end of the lower shell. A lower sealing groove is formed in the upper side of the lower shell, a first sealing ring is arranged in the lower sealing groove, a valve rod is movably connected to the middle of the lower shell, and notches are formed in the outer portions of the left end and the right end of the valve rod. The air pump, the main valve, the hose and the cavity are matched to control the valve rod to move left and right, so that a spring is replaced to control the valve rod to move, the movement stability of the device is improved, the service life of the device is prolonged, and the air pump, the main valve, the hose, the second connecting pipe and the second one-way valve are matched to automatically supplement air. And the normal operation of equipment is prevented from being influenced by insufficient air pressure or leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, in particular to an air-controlled reversing valve capable of automatically compensating air pressure. Background Art

[0002] The two-position five-way directional valve is a basic automation component used to control fluids. There are many types of standard conventional two-position five-way directional valves on the market. The most common ones are the electromagnetic directional valve that uses electromagnetic suction to control the switching of the directional valve, and the pneumatic directional valve that uses compressed air to control the switching of the directional valve. The return control of the above two types of directional valves relies on the return spring to complete the return of the valve core. The structure of the directional valve is relatively complex and the service life is not long.

[0003] After searching, a pneumatically controlled reversing valve with announcement number CN217761507U relates to the technical field of reversing valves, including a valve seat and a reversing valve core. The valve seat is provided with an input port, and the interior of the valve seat is hollow to form a center hole. The reversing valve core is installed in the center hole of the valve seat and can reciprocate inside the center hole; the reversing valve core has a hollow air passage, which is connected to the input port and the center hole; the end of the reversing valve core forms an active air chamber with the hollow air passage and the center hole; the air flow flows from the valve seat input port through the hollow air passage inside the valve core into the active air chamber to increase the air pressure inside the active air chamber, and the reversing valve core is positively pushed to move relative to the valve seat to achieve reversal. The pneumatically controlled reversing valve in the utility model relies on gas to drive the reversing valve core. The movement of the reversing valve core does not require spring control, and the reversing is smooth and rapid, which is conducive to extending the service life of the reversing valve. The overall structure is simple, the reliability is high, and the scope of application is wide.

[0004] Based on the above patent, the background technology thereof mentioned that the return of the valve core depends on a return spring, the structure of the reversing valve is relatively complex and the service life is not long. In view of this, in order to solve this technical problem, the present application proposes an air-controlled reversing valve that automatically compensates for air pressure. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an air-controlled reversing valve with automatic air pressure compensation, which can replace the pushing effect of the spring and improve the stability of the reversing valve movement and the service life.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] 14. The air-controlled reversing valve as claimed in claim 13, wherein the air-controlled reversing valve has the advantages of being easily installed and easily used in combination with the air-conditioning system of claim 13. The air-controlled reversing valve as claimed in claim 13 is easily installed in combination with the air-conditioning system of claim 13.

[0008] Furthermore, the air control assembly includes an air control box at the left and right ends of the lower shell, a cavity is opened in the middle of the air control box, the four upper corners of the air control box are fixedly connected with bolts, a cover plate is provided on the upper side of the air control box, annular sealing grooves are opened on the opposite sides of the cover plate and the air control box, a second sealing ring is provided on the inner side of the annular sealing groove, a first connecting pipe is fixedly connected to the middle part of the upper side of the cover plate, and a first one-way valve is fixedly connected to the middle part of the first connecting pipe.

[0009] Furthermore, the pneumatic assembly includes an air pump on the upper side of the upper shell, a main valve is fixedly connected to the upper side of the air pump, and a plurality of hoses are fixedly connected to the upper side of the main valve.

[0010] Furthermore, the opposite sides of the air control box are fixedly connected to the left and right sides of the lower shell respectively.

[0011] Furthermore, the bottom of the air pump is fixedly connected to the upper side of the upper shell.

[0012] Furthermore, the lower end of the hose is fixedly connected to the top of the first connecting pipe and the top of the second connecting pipe respectively.

[0013] Furthermore, the air cavity and the hollow cavity are correspondingly communicated with each other.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the air pump, the main valve, the hose and the cavity are arranged to cooperate to control the left and right movement of the valve stem, thereby replacing the spring to control the movement of the valve stem, improving the stability of the movement of the device and increasing the practical life of the device.

[0016] 2. In the utility model, the air pump, the main valve, the hose, the second connecting pipe and the second one-way valve are arranged to cooperate with each other to automatically replenish air, thereby preventing the normal operation of the equipment from being affected by insufficient air pressure or leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall schematic diagram of an air-controlled reversing valve for automatically compensating air pressure proposed by the utility model;

[0018] Figure 2 This is an explosion diagram of an air-controlled reversing valve for automatically compensating air pressure proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the lower shell of a gas-controlled reversing valve for automatically compensating air pressure proposed by the utility model;

[0020] Figure 4 A schematic diagram of a valve stem of a gas-controlled reversing valve for automatically compensating air pressure proposed by the utility model;

[0021] Figure 5 The utility model is a schematic diagram of a cover plate of an air-controlled reversing valve for automatically compensating air pressure.

[0022] Legend:

[0023] 1. Lower shell; 2. Output port; 3. Air inlet; 4. Exhaust port; 5. Lower sealing groove; 6. Valve stem; 7. Notch; 8. Air cavity; 10. Upper shell; 11. Upper sealing groove; 12. Air control box; 13. Cavity; 14. Annular sealing groove; 15. Bolt; 16. Cover plate; 17. First connecting pipe; 18. First one-way valve; 19. Second connecting pipe; 20. Second one-way valve; 21. Air pump; 22. Main valve; 23. Hose; 24. First sealing ring; 25. Second sealing ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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] Reference Figure 1-5The utility model provides an embodiment: an air-controlled reversing valve for automatically compensating air pressure, comprising a lower shell 1, an output port 2 is provided on both sides of the front end of the lower shell 1, an air inlet 3 is provided in the middle of the rear end of the lower shell 1, an exhaust port 4 is provided on both sides of the rear end of the lower shell 1, a lower sealing groove 5 is provided on the upper side of the lower shell 1, a first sealing ring 24 is provided inside the lower sealing groove 5, a valve stem 6 is movably connected to the middle part of the lower shell 1, notches 7 are provided on the left and right ends of the valve stem 6, air cavities 8 are provided inside the left and right ends of the valve stem 6, and an upper shell 1 is fixedly connected to the upper side of the lower shell 1 0, an upper sealing groove 11 is provided on the lower side of the upper shell 10, the inner wall of the upper sealing groove 11 is tightly matched with the upper outer wall of the first sealing ring 24, the left and right ends of the upper shell 10 are fixedly connected with the second connecting pipe 19, and the middle part of the second connecting pipe 19 is fixedly connected with the second one-way valve 20; through the cooperation of the second connecting pipe 19 and the second one-way valve 20, automatic air replenishment can be performed to avoid insufficient air pressure or leakage affecting the normal operation of the equipment, and the sealing between the lower shell 1 and the upper shell 10 can be maintained through the cooperation of the lower sealing groove 5, the upper sealing groove 11 and the first sealing ring 24.

[0026] The left and right ends of the lower shell 1 are fixedly connected with an air control box 12, a cavity 13 is opened in the middle of the air control box 12, the air cavity 8 is connected to the cavity 13 correspondingly, the four corners of the upper side of the air control box 12 are fixedly connected with bolts 15, the upper side of the air control box 12 is provided with a cover plate 16, the cover plate 16 and the opposite side of the air control box 12 are provided with an annular sealing groove 14, the inner side of the annular sealing groove 14 is provided with a second sealing ring 25, the middle part of the upper side of the cover plate 16 is fixedly connected with a first connecting pipe 17, and the middle part of the first connecting pipe 17 is fixedly connected with a first one-way valve 18; the first connecting pipe 17 and the first one-way valve 18 can be provided to inject gas into the cavity 13, and cooperate with the air cavity 8 to push the valve stem 6 to move left and right, thereby replacing the pushing effect of the spring, improving the stability of the device, and improving the service life.

[0027] An air pump 21 is fixedly connected to the upper side of the upper shell 10, a main valve 22 is fixedly connected to the upper side of the air pump 21, a plurality of hoses 23 are fixedly connected to the upper side of the main valve 22, and the lower ends of the hoses 23 are respectively fixedly connected to the tops of the first connecting pipe 17 and the second connecting pipe 19; the air pump 21 and the main valve 22 can generate high-pressure gas, and inject gas into the cavity 13 and the lower shell 1 through the set hoses 23 and the first connecting pipe 17 and the second connecting pipe 19.

[0028] Working principle: high-pressure gas can be generated by the air pump 21 and the main valve 22, and gas is injected into the cavity 13 and the lower shell 1 through the hose 23 and the first connecting pipe 17 and the second connecting pipe 19. High-pressure gas is injected into the air cavity 8 through the cavity 13 to push the valve stem 6 to move left and right, thereby controlling the operation of the reversing valve. Gas is injected into the second connecting pipe 19 through the air pump 21, the main valve 22 and the hose 23. When the equipment leaks or the air pressure is insufficient, the gas is replenished to keep the reversing valve in normal use.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatically controlled reversing valve for automatically compensating air pressure, comprising a lower housing (1), characterized in that: The front end of the lower shell (1) is provided with an output port (2) on both sides, the middle of the rear end of the lower shell (1) is provided with an air inlet (3), the rear end of the lower shell (1) is provided with an exhaust port (4) on both sides, the upper side of the lower shell (1) is provided with a lower sealing groove (5), the interior of the lower sealing groove (5) is provided with a first sealing ring (24), the middle of the lower shell (1) is movably connected with a valve stem (6), the left and right ends of the valve stem (6) are provided with notches (7), and the left and right ends of the valve stem (6) are provided with air outlets (9). The upper side of the lower shell (1) is fixedly connected to the upper shell (10), the upper side of the upper shell (10) is provided with a pneumatic component, the lower side of the upper shell (10) is provided with an upper sealing groove (11), the inner wall of the upper sealing groove (11) is tightly matched with the upper outer wall of the first sealing ring (24), the left and right ends of the upper shell (10) are fixedly connected to the second connecting pipe (19), the middle part of the second connecting pipe (19) is fixedly connected to the second one-way valve (20), and the left and right ends of the lower shell (1) are provided with a pneumatic control component.

2. The pneumatically controlled reversing valve for automatically compensating air pressure according to claim 1, characterized in that: The air control assembly comprises an air control box (12) at the left and right ends of the lower housing (1), a cavity (13) is provided in the middle of the air control box (12), bolts (15) are fixedly connected to the four corners of the upper side of the air control box (12), a cover plate (16) is provided on the upper side of the air control box (12), an annular sealing groove (14) is provided on the opposite side of the cover plate (16) and the air control box (12), a second sealing ring (25) is provided on the inner side of the annular sealing groove (14), a first connecting pipe (17) is fixedly connected to the middle of the upper side of the cover plate (16), and a first one-way valve (18) is fixedly connected to the middle of the first connecting pipe (17).

3. The pneumatically controlled reversing valve for automatically compensating air pressure according to claim 1, characterized in that: The pneumatic assembly comprises an air pump (21) on the upper side of the upper housing (10), a main valve (22) is fixedly connected to the upper side of the air pump (21), and a plurality of hoses (23) are fixedly connected to the upper side of the main valve (22).

4. The air-controlled reversing valve for automatically compensating air pressure according to claim 2, characterized in that: The opposite sides of the air control box (12) are respectively fixedly connected to the left and right sides of the lower housing (1).

5. The pneumatically controlled reversing valve for automatically compensating air pressure according to claim 3, characterized in that: The bottom of the air pump (21) is fixedly connected to the upper side of the upper housing (10).

6. The pneumatically controlled reversing valve for automatically compensating air pressure according to claim 3, characterized in that: The lower end of the hose (23) is fixedly connected to the top of the first connecting pipe (17) and the top of the second connecting pipe (19), respectively.

7. The air-controlled reversing valve for automatically compensating air pressure according to claim 1, characterized in that: The air cavity (8) and the cavity (13) are correspondingly communicated with each other.

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