Overflow valve with guard

Abstract

The utility model discloses a kind of overflow valve with protection device, including valve body, valve core, pressure regulating spring, first liquid inlet, first liquid outlet, threaded tube and pressure regulating nut, the lower end outer wall of pressure regulating nut is provided with several spline teeth that are circumferentially arranged evenly, reset spring is set on the top end of pressure regulating nut, reset spring is provided with screw cap, the inner wall of screw cap is provided with several spline tooth grooves that are circumferentially arranged evenly, in the utility model, by the split design between pressure regulating nut and screw cap, and via the elastic effect of reset spring, the trend of vertical separation between screw cap and pressure regulating nut is formed, effectively avoid the false touch operation after pressure regulating nut pressure regulating adjustment, with certain protection effect, and by the cooperation between spline tooth and spline tooth groove, screw cap is connected between pressure regulating nut and can be radially rotated as a whole by being pressed down, so as to realize the screwing pressure regulating effect of screw cap driving pressure regulating nut.

Description

Technical Field

[0001] This utility model relates to the field of overflow valve technology, and in particular to an overflow valve with a protective device. Background Technology

[0002] Safety valves, also known as relief valves, are, as the name suggests, key safety protections for pressure pipelines and pressure vessels. To ensure the normal operation of safety valves and extend their service life, safety relief valves play a safety protection role in the system. When the system pressure exceeds the specified value, the safety valve opens, releasing a portion of the gas in the system into the atmosphere, so that the system pressure does not exceed the allowable value, thereby ensuring that the system does not experience accidents due to excessive pressure.

[0003] Traditional overflow valves have certain drawbacks. Because the inlet of the overflow valve is equipped with a filter, the valve core is exposed to the fluid and is easily worn by particles, resulting in low sealing performance. Contaminants can easily enter the spring cavity, causing the spring to stick. In addition, the pressure regulating mechanism of traditional overflow valves is usually a bolt screw, which is prone to accidental operation due to the lack of protective devices. Therefore, an overflow valve with a protective device is needed to meet people's needs. Utility Model Content

[0004] The purpose of this invention is to provide an overflow valve with a protective device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an overflow valve with a protective device, comprising a valve body, a valve core, a pressure regulating spring, a first inlet, a first outlet, a threaded tube, and a pressure regulating nut. The lower outer wall of the pressure regulating nut is provided with a plurality of circumferentially evenly arranged spline teeth. A return spring is provided at the top of the pressure regulating nut, and a screw cap is provided on the return spring. The inner wall of the screw cap is provided with a plurality of circumferentially evenly arranged spline grooves. The width and depth of the spline grooves are the same as those of the spline teeth, and their vertical positions correspond. A filter device is provided at the first inlet. The filter device consists of a shell, a second inlet, a second outlet, a chamber, and a filter cylinder. The second outlet is connected to the first inlet. The chamber is connected to the second inlet and the second outlet. The filter cylinder is arranged within the chamber, with one end contacting the end of the chamber near the second inlet.

[0006] Preferably, a locking nut is threaded onto the outer wall of the threaded tube, and the locking nut is arranged between the end of the valve body and the pressure regulating nut.

[0007] Preferably, a spring plate is provided on the top end of the reset spring, and a connecting shaft is provided on the spring plate. The connecting shaft has a T-shaped cross-section and is rotatably connected to the inside of the top end of the nut.

[0008] Preferably, the second liquid outlet is connected to the first liquid inlet via an interface pipe thread.

[0009] Preferably, a plug is internally threaded to the end of the chamber opposite to the second liquid inlet. One end of the plug is connected to the end of the filter cartridge opposite to the second liquid inlet, and the other end is arranged in a hexagonal shape on the outside of the outer shell.

[0010] Preferably, a sealing ring is embedded in one end of the chamber near the second liquid inlet, and one end of the filter cartridge is in contact with the sealing ring.

[0011] The beneficial effects of this utility model are:

[0012] This invention employs a separate design between the pressure regulating nut and the screw cap, and through the elasticity of the return spring, the screw cap and the pressure regulating nut are vertically separated, effectively preventing accidental operation after the pressure regulating nut has been adjusted, thus providing a certain degree of protection. Furthermore, through the cooperation between the spline teeth and the spline grooves, the screw cap can be pressed down and connected to the pressure regulating nut to form a radially rotatable whole, thereby achieving the effect of the screw cap driving the pressure regulating nut to turn and adjust the pressure.

[0013] In this invention, the filtration device is formed by the outer shell, the second inlet, the second outlet, the chamber, and the filter cylinder. This allows the fluid to be filtered before entering the overflow valve, thereby effectively removing particulate matter and contaminants from the fluid and preventing wear and jamming of the valve core and spring of the overflow valve, thus providing a certain degree of protection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an overflow valve with a protective device proposed in this utility model;

[0015] Figure 2 This is a front cross-sectional view of an overflow valve with a protective device proposed in this utility model.

[0016] Figure 3 A schematic diagram of the explosion connection structure between the pressure regulating nut and the rotary cap of an overflow valve with a protective device proposed in this utility model;

[0017] Figure 4 This is an exploded structural diagram of a filter device with a protective device for an overflow valve proposed in this utility model.

[0018] In the diagram: 1. Valve body; 2. Valve core; 3. Pressure regulating spring; 4. First inlet; 5. First outlet; 6. Threaded pipe; 7. Pressure regulating nut; 8. Splined teeth; 9. Return spring; 10. Screw cap; 11. Splined groove; 12. Filter device; 13. Outer shell; 14. Second inlet; 15. Second outlet; 16. Chamber; 17. Filter cylinder; 18. Locking nut; 19. Spring plate; 20. Connecting shaft; 21. Interface pipe; 22. Plug; 23. Sealing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-4 An overflow valve with a protective device includes a valve body 1, a valve core 2, a pressure regulating spring 3, a first inlet 4, a first outlet 5, a threaded pipe 6, and a pressure regulating nut 7. The lower outer wall of the pressure regulating nut 7 has several circumferentially evenly arranged spline teeth 8. A return spring 9 is located at the top of the pressure regulating nut 7, and a rotating cap 10 is mounted on the return spring 9. The inner wall of the rotating cap 10 has several circumferentially evenly arranged spline grooves 11. The spline grooves 11 and the spline... The width and depth of the teeth 8 are the same and their vertical positions correspond. A filter device 12 is provided at the first liquid inlet 4. The filter device 12 consists of a shell 13, a second liquid inlet 14, a second liquid outlet 15, a chamber 16 and a filter cylinder 17. The second liquid outlet 15 is connected to the first liquid inlet 4. The chamber 16 is connected to the second liquid inlet 14 and the second liquid outlet 15. The filter cylinder 17 is arranged in the chamber 16, with one end in contact with the end of the chamber 16 near the second liquid inlet 14.

[0021] The separate design of the pressure regulating nut 7 and the rotary nut 10, along with the elasticity of the return spring 9, creates a vertical separation between the rotary nut 10 and the pressure regulating nut 7, effectively preventing accidental operation after the pressure regulating nut 7 has been adjusted. This provides a certain level of protection. Furthermore, the engagement between the spline teeth 8 and the spline groove 11 allows the rotary nut 10 to be pressed down and connected to the pressure regulating nut 7 as a radially rotatable unit, thus enabling the rotary nut 10 to drive the pressure regulating nut 7 to adjust the pressure. The filter device 12, consisting of the outer shell 13, the second inlet 14, the second outlet 15, the chamber 16, and the filter cartridge 17, ensures that the fluid is filtered before entering the overflow valve, effectively removing particulate matter and contaminants from the fluid. This prevents wear and jamming of the valve core 2 and the pressure regulating spring 3 of the overflow valve, providing a certain level of protection.

[0022] Specifically, in this embodiment, a locking nut 18 is threaded onto the outer wall of the threaded pipe 6. The locking nut 18 is arranged between the end of the valve body 1 and the pressure regulating nut 7 to improve the stability after the pressure regulating nut 7 is turned to adjust the pressure.

[0023] Specifically, in this embodiment, a spring plate 19 is provided on the top of the return spring 9, and a connecting shaft 20 is provided on the spring plate 19. The cross-section of the connecting shaft 20 is T-shaped. The connecting shaft 20 is rotatably connected to the top of the cap 10, ensuring the vertical connection between the cap 10 and the pressure adjusting nut 7. At the same time, it realizes the rotatability of the cap 10, preventing the return spring 9 from loosening when the spline teeth 8 and the spline groove 11 are not fully engaged.

[0024] Specifically, in this embodiment, the second liquid outlet 15 is threadedly connected to the first liquid inlet 4 via an interface pipe 21.

[0025] Specifically, in this embodiment, a plug 22 is internally threaded to one end of the chamber 16 away from the second liquid inlet 14. One end of the plug 22 is connected to the end of the filter cartridge 17 away from the second liquid inlet 14, and the other end is arranged in a hexagonal shape on the outside of the outer shell 13. This achieves the effect of the plug 22 driving the filter cartridge 17 to be detachable from the outer shell 13, thereby facilitating the cleaning and removal of particles and pollutants accumulated inside the filter cartridge 17.

[0026] Specifically, in this embodiment, a sealing ring 23 is embedded in one end of the chamber 16 near the second liquid inlet 14, and one end of the filter cartridge 17 is in contact with the sealing ring 23, which improves the sealing effect between the end of the filter cartridge 17 and the end of the chamber 16, preventing particulate matter and pollutants from leaking from the connection.

[0027] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A relief valve with a protective device, comprising a valve body (1), a valve core (2), a pressure regulating spring (3), a first inlet (4), a first outlet (5), a threaded pipe (6), and a pressure regulating nut (7), characterized in that: The lower outer wall of the pressure regulating nut (7) is provided with a number of circumferentially evenly arranged spline teeth (8). The top of the pressure regulating nut (7) is provided with a return spring (9). A screw cap (10) is provided on the return spring (9). The inner wall of the screw cap (10) is provided with a number of circumferentially evenly arranged spline tooth grooves (11). The width and depth of the spline tooth grooves (11) are the same as those of the spline teeth (8), and their vertical positions correspond to each other. An over-filling device is provided at the first liquid inlet (4). The filter device (12) consists of a shell (13), a second liquid inlet (14), a second liquid outlet (15), a chamber (16), and a filter cylinder (17). The second liquid outlet (15) is connected to the first liquid inlet (4). The chamber (16) is connected to the second liquid inlet (14) and the second liquid outlet (15). The filter cylinder (17) is arranged in the chamber (16), and one end of it is in contact with the end of the chamber (16) near the second liquid inlet (14).

2. The overflow valve with a protective device according to claim 1, characterized in that: A locking nut (18) is threaded onto the outer wall of the threaded pipe (6), and the locking nut (18) is arranged between the end of the valve body (1) and the pressure regulating nut (7).

3. The overflow valve with a protective device according to claim 1, characterized in that: The top of the reset spring (9) is provided with a spring plate (19), and a connecting shaft (20) is provided on the spring plate (19). The cross section of the connecting shaft (20) is T-shaped, and the connecting shaft (20) is rotatably connected to the top of the cap (10).

4. The overflow valve with a protective device according to claim 1, characterized in that: The second outlet (15) is threadedly connected to the first inlet (4) via an interface pipe (21).

5. The overflow valve with a protective device according to claim 1, characterized in that: The chamber (16) is internally threaded with a plug (22) at one end away from the second liquid inlet (14). One end of the plug (22) is connected to the end of the filter cylinder (17) away from the second liquid inlet (14), and the other end is arranged in a hexagonal shape on the outside of the outer shell (13).

6. A relief valve with a protective device according to claim 1, characterized in that: A sealing ring (23) is embedded in one end of the chamber (16) near the second liquid inlet (14), and one end of the filter cylinder (17) is in contact with the sealing ring (23).

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