Multi-stage pressure reduction stop valve

Abstract

The utility model discloses a multistage depressurization stop valve, which relates to the field of stop valves, and comprises a valve body, a valve rod is arranged in the valve body, a liquid inlet groove and a liquid outlet groove are arranged on two sides of the valve body, a communication groove is arranged between the liquid inlet groove and the liquid outlet groove, a sleeve is arranged in the valve body, and the valve rod is arranged in the sleeve. The outer diameter of the sleeve is larger than the inner diameter of the communicating groove, and a plurality of liquid passing openings with different diameters are formed in the surface of the sleeve. According to the multi-stage pressure reduction stop valve, the valve element, the valve body, the liquid passing openings and the liquid leakage opening are arranged, when fluid flows to the position of the valve element, the pressure of the fluid can extrude the valve element, so that the valve element gradually moves upwards, and when the liquid leakage opening is opposite to the lowest liquid passing opening, the fluid can flow out from the position of the liquid outlet groove; and when the pressure of the fluid is increased, the valve element moves upwards continuously, and the liquid leakage opening is aligned with each liquid passing opening in sequence, so that the pressure of different fluids is adjusted, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the field of stop valves, in particular to a multi-stage pressure-reducing stop valve. Background Art

[0002] The pressure reducing valve is also called a pressure reducing valve. It reduces the inlet pressure to a certain required outlet pressure and relies on the energy of the medium itself to automatically keep the outlet pressure stable. The pressure reducing valve changes the flow rate and the kinetic energy of the fluid by changing the throttling area, causing different pressure losses, thereby achieving the purpose of pressure reduction. Then, the control and regulation system is adjusted to balance the fluctuation of the pressure behind the valve with the spring force, so that the pressure behind the valve remains constant within a certain error range.

[0003] When the fluid is input into the interior of the pressure reducing valve, the pressure of the fluid is directly applied to the valve core of the pressure reducing valve and flows out through the flow channel between the valve core and the valve body. Since the diameter of the flow channel is smaller than the diameter of the liquid outlet of the valve body, the purpose of pressure reduction can be achieved. However, the fluid pressure value at the outflow position of the traditional pressure reducing valve is basically a fixed value, which makes the application range small. At the same time, a too small flow channel will cause the fluid to exert a large pressure on the valve core, thereby affecting the service life of the valve core. Utility Model Content

[0004] The main purpose of the utility model is to provide a multi-stage pressure-reducing stop valve, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-stage pressure-reducing stop valve, including a valve body, a valve stem is arranged inside the valve body, a liquid inlet groove and a liquid outlet groove are arranged on both sides of the valve body, a connecting groove is arranged between the liquid inlet groove and the liquid outlet groove, a sleeve is installed inside the valve body, the outer diameter of the sleeve is larger than the inner diameter of the connecting groove, a plurality of liquid through ports with different diameters are provided on the surface of the sleeve, and the inner diameters of the plurality of liquid through ports increase successively from top to bottom, a barrel-shaped valve core is installed inside the sleeve, the sealing end of the valve core is located inside the sleeve, the open end of the valve core is located inside the connecting groove, one end of the valve stem is fixed on the valve core, a liquid leakage port is provided on the surface of the valve core, and the diameter of the liquid leakage port is the same as the maximum diameter of the liquid through port.

[0006] A mounting ring is fixedly mounted on the lower end of the sleeve, the cross section of the mounting ring is set to be L-shaped, the mounting ring is sleeved on the surface of the valve core, and a sealing filler is arranged between the mounting ring and the surface of the valve core.

[0007] An extrusion spring is arranged inside the sleeve, one end of the extrusion spring is fixed on the surface of the valve core, the other end of the extrusion spring is fixed inside the sleeve, and the extrusion spring is sleeved on the surface of the valve stem.

[0008] A truncated cone-shaped resistance block is suspended inside the valve core, a connecting rod is installed on the surface of the resistance block, one end of the connecting rod is fixed to the inner wall of the valve core, and the resistance block is located below the liquid leakage port.

[0009] A slide groove is provided inside the sleeve, and a guide block is fixedly installed on the surface of the valve core, and the guide block is stuck in the slide groove.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. In the utility model, by arranging the valve core, the valve body, the liquid passage port and the leakage port, when the fluid flows to the position of the valve core, the pressure of the fluid will squeeze the valve core, causing the valve core to gradually move upwards. When the leakage port is aligned with the lowest liquid passage port, the fluid will flow out from the position of the liquid outlet groove, thereby realizing the pressure reduction of the fluid. When the fluid pressure increases, the valve core moves upwards continuously, and the leakage port is aligned with each liquid passage port position in turn, thereby realizing the regulation of different fluid pressures, and having a wider range of applications.

[0012] 2. In the utility model, by setting a valve core, when the fluid enters the interior of the valve core, a part of the fluid is squeezed on the surface of the resistance block. At this time, the fluid will first squeeze the resistance block to move. Since the resistance block is connected to the valve core through a connecting rod, the valve core can be used more quickly to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a multi-stage pressure-reducing stop valve of the utility model;

[0014] Figure 2 This is a partial structural diagram of the liquid port position of a multi-stage pressure-reducing stop valve of the utility model;

[0015] Figure 3 This is a partial structural schematic diagram of the leakage port position of a multi-stage pressure-reducing stop valve of the utility model;

[0016] Figure 4 The utility model is a schematic diagram of the sealing packing position of a multi-stage pressure-reducing stop valve.

[0017] In the figure: 1. valve body; 2. valve stem; 3. liquid inlet groove; 4. liquid outlet groove; 5. connecting groove; 6. sleeve; 7. liquid outlet; 8. guide block; 9. valve core; 10. liquid leakage port; 11. mounting ring; 12. sealing packing; 13. extrusion spring; 14. resistance block; 15. connecting rod; 16. slide groove. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-4 As shown, a multi-stage pressure-reducing stop valve comprises a valve body 1, wherein a valve stem 2 is arranged inside the valve body 1, and the valve stem 2 can move up and down, and a liquid inlet groove 3 and a liquid outlet groove 4 are arranged on both sides of the valve body 1, and a connecting groove 5 is arranged between the liquid inlet groove 3 and the liquid outlet groove 4, and the connecting groove 5, the liquid inlet groove 3 and the liquid outlet groove 4 are connected, and a sleeve 6 is installed inside the valve body 1, and the outer diameter of the sleeve 6 is larger than the inner diameter of the connecting groove 5, and the surface of the sleeve 6 is provided with a plurality of liquid through holes 7 with different diameters, and the through holes 7 are connected to each other. The liquid ports 7 are all connected to the interior of the liquid outlet groove 4, and the inner diameters of the multiple liquid ports 7 increase from top to bottom. A barrel-shaped valve core 9 is installed inside the sleeve 6, and the sealing end of the valve core 9 is located inside the sleeve 6. The open end of the valve core 9 is located inside the communication groove 5. One end of the valve stem 2 is fixed on the valve core 9. A liquid leakage port 10 is opened on the surface of the valve core 9. The diameter of the liquid leakage port 10 is the same as the maximum diameter of the liquid port 7, and the distance between two adjacent liquid ports 7 is the diameter of the liquid leakage port 10.

[0020] When the fluid flows from the liquid inlet groove 3 to the position of the valve core 9, the pressure of the fluid will squeeze the valve core 9, causing the valve core 9 to gradually move upward. When the leakage port 10 is aligned with the lowest liquid through port 7, the fluid will flow out from the position of the liquid outlet groove 4, thereby achieving fluid pressure reduction. However, when the pressure of the fluid gradually increases, the valve core 9 continues to move upward, and the leakage port 10 is aligned with each liquid through port 7 in turn, thereby achieving the adjustment of different fluid pressures. The application range is wider, and the adjustment method is simple and convenient, relying only on the energy of the fluid itself for adjustment.

[0021] A mounting ring 11 is fixedly installed at the lower end of the sleeve 6. The outer diameter of the mounting ring 11 is the same as the outer diameter of the sleeve 6, and the two are of an integral shape. The cross-section of the mounting ring 11 is set to be L-shaped. The mounting ring 11 is sleeved on the surface of the valve core 9. At this time, there is a certain gap between the mounting ring 11 and the valve core 9. A sealing filler 12 is provided between the mounting ring 11 and the surface of the valve core 9 to ensure the sealing between the sleeve 6 and the valve core 9 and prevent the flow from leaking from between the sleeve 6 and the valve core 9.

[0022] An extrusion spring 13 is provided inside the sleeve 6, one end of the extrusion spring 13 is fixed to the surface of the valve core 9, and the other end of the extrusion spring 13 is fixed inside the sleeve 6. The extrusion spring 13 is sleeved on the surface of the valve stem 2. When not in use, the extrusion spring 13 is in a normal state, and the valve core 9 moves up under the pressure of the fluid. At this time, the extrusion spring 13 forms a force balance with the fluid pressure, and the extrusion spring 13 is in a compressed state. When there is no fluid, the valve core 9 returns to its initial position, which is convenient for next use.

[0023] A truncated cone-shaped resistance block 14 is suspended inside the valve core 9, and a connecting rod 15 is installed on the surface of the resistance block 14. One end of the connecting rod 15 is fixed to the inner wall of the valve core 9. The resistance block 14 is located below the leakage port 10. When the fluid enters the interior of the valve core 9, a part of the fluid is squeezed on the surface of the resistance block 14. At this time, the fluid will first squeeze the resistance block 14 to move. Since the resistance block 14 is connected to the valve core 9 by the connecting rod 15, the valve core 9 can be used more quickly to improve work efficiency.

[0024] A slide groove 16 is provided inside the sleeve 6, and a guide block 8 is fixedly installed on the surface of the valve core 9. The guide block 8 is stuck in the slide groove 16. During the movement of the valve core 9, the guide block 8 moves inside the slide groove 16, which can prevent the valve core 9 from rotating during use.

[0025] It should be noted that the utility model is a multi-stage pressure-reducing stop valve. When in use, when the fluid flows from the liquid inlet groove 3 to the position of the valve core 9, a part of the fluid is squeezed on the surface of the resistance block 14. At this time, the fluid will first squeeze the resistance block 14 to move. Since the resistance block 14 is connected to the valve core 9 through the connecting rod 15, the valve core 9 can be used to move faster at this time. When the leakage port 10 is aligned with the lowest liquid port 7, the fluid will flow out from the position of the liquid outlet groove 4, thereby realizing the pressure reduction of the fluid. However, when the pressure of the fluid gradually increases, the valve core 9 keeps moving upward, and the leakage port 10 is aligned with each liquid port 7 in turn, thereby realizing the regulation of different fluid pressures. The scope of application is wider, and the adjustment method is simple and convenient, and only relies on the energy of the fluid itself for regulation.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-stage pressure-reducing stop valve, comprising a valve body (1), a valve stem (2) being arranged inside the valve body (1), and a liquid inlet groove (3) and a liquid outlet groove (4) being arranged on both sides of the valve body (1), characterized in that: A connecting groove (5) is provided between the liquid inlet groove (3) and the liquid outlet groove (4); a sleeve (6) is installed inside the valve body (1); the outer diameter of the sleeve (6) is larger than the inner diameter of the connecting groove (5); a plurality of liquid through holes (7) with different diameters are provided on the surface of the sleeve (6); the inner diameters of the plurality of liquid through holes (7) increase from top to bottom; a barrel-shaped valve core (9) is installed inside the sleeve (6); the sealing end of the valve core (9) is located inside the sleeve (6); the open end of the valve core (9) is located inside the connecting groove (5); one end of the valve stem (2) is fixed on the valve core (9); a liquid leakage hole (10) is provided on the surface of the valve core (9); the diameter of the liquid leakage hole (10) is the same as the maximum diameter of the liquid through hole (7).

2. A multi-stage pressure-reducing stop valve according to claim 1, characterized in that: A mounting ring (11) is fixedly mounted on the lower end of the sleeve (6); the cross section of the mounting ring (11) is arranged to be L-shaped; the mounting ring (11) is sleeved on the surface of the valve core (9); and a sealing packing (12) is arranged between the mounting ring (11) and the surface of the valve core (9).

3. A multi-stage pressure-reducing stop valve according to claim 1, characterized in that: An extrusion spring (13) is arranged inside the sleeve (6), one end of the extrusion spring (13) is fixed to the surface of the valve core (9), the other end of the extrusion spring (13) is fixed inside the sleeve (6), and the extrusion spring (13) is sleeved on the surface of the valve stem (2).

4. A multi-stage pressure-reducing stop valve according to claim 1, characterized in that: A truncated cone-shaped resistance block (14) is suspended inside the valve core (9), a connecting rod (15) is installed on the surface of the resistance block (14), one end of the connecting rod (15) is fixed to the inner wall of the valve core (9), and the resistance block (14) is located below the liquid leakage port (10).

5. The multi-stage pressure reducing stop valve according to claim 1, characterized in that: A slide groove (16) is provided inside the sleeve (6), and a guide block (8) is fixedly mounted on the surface of the valve core (9), wherein the guide block (8) is clamped inside the slide groove (16).

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