Liquid one-way valve with pressure reducing device

Abstract

The liquid one-way valve with the pressure reducing device comprises a main body assembly, the main body assembly comprises a valve body, a pressure reducing assembly is arranged in the main body assembly, and the pressure reducing assembly comprises a supporting ring, a pressure reducing plate, a through hole, a groove, a second spring and a limiting block; a supporting ring is fixedly connected to the inner side wall of the valve body, a pressure reducing plate is arranged on one side of the supporting ring, through holes are evenly formed in the surface of the pressure reducing plate, grooves are evenly formed in the inner side wall of the valve body, and second springs are fixedly connected to the inner side walls of the grooves. The pressure reducing plate is mounted at the liquid inlet, the flow of fluid in a fire extinguishing system is limited by the aid of the through holes in the pressure reducing plate, so that pressure borne by the one-way valve and the collecting pipe during operation is reduced, the service lives of the one-way valve and the collecting pipe are prolonged, the pressure reducing plate is fixed by the aid of the spring and the limit block, maintenance and replacement of the pressure reducing plate are facilitated, and safety of the fire extinguishing system is improved. The one-way valve maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a one-way valve, in particular to a liquid one-way valve with a pressure reducing device, belonging to the technical field of one-way valves. Background Art

[0002] A check valve, also known as a non-return valve or non-return valve, is a key control component widely used in fluid systems. Its primary function is to ensure fluid flow in one direction only, preventing reverse flow. This characteristic makes it indispensable in a wide range of industrial fields.

[0003] At present, the storage pressures of IG01 (argon fire extinguishing system), IG100 (nitrogen fire extinguishing system), IG55 (nitrogen and argon mixed gas fire extinguishing system) and IG541 (nitrogen, argon and carbon dioxide mixed gas fire extinguishing system) commonly used in China are 20MPa and 15MPa respectively, and the maximum working pressures are 23.2MPa and 17.2MPa respectively; the pressure reducing device is installed at the intersection of the manifold and the selector valve, which only protects the pipe network part at the rear end of the selector valve, but cannot protect the manifold and the one-way valve. Therefore, a liquid one-way valve with a built-in pressure reducing device is proposed. Utility Model Content

[0004] The purpose of the present utility model is to provide a liquid one-way valve with a built-in pressure reducing device to solve one of the problems raised in the above background technology.

[0005] The utility model is implemented by the following technical solutions: a liquid one-way valve with a self-contained pressure reducing device, comprising a main body assembly, the main body assembly comprising a valve body, a pressure reducing assembly disposed inside the main body assembly, the pressure reducing assembly comprising a support ring, a pressure reducing plate, a through hole, a groove, a second spring and a limit block;

[0006] The cam is fixedly provided with a support ring on the inner side wall of the valve body, and a pressure reducing plate is provided on one side of the support ring. The surface of the pressure reducing plate is evenly provided with through holes, and the inner side wall of the valve body is evenly provided with grooves, and the inner side wall of the groove is fixedly connected to a second spring, and one end of the second spring is fixedly connected to a limiting block, and the limiting block is slidably connected to the inner side wall of the groove. The support ring can provide support for the pressure reducing plate to ensure that the pressure reducing plate does not move under fluid pressure. The fluid in the fire extinguishing system enters through the liquid inlet and is reduced in pressure by the pressure reducing plate inside the liquid inlet. The through hole on the pressure reducing plate is used to limit the flow rate of the fluid in the fire extinguishing system, thereby reducing the pressure on the one-way valve and the manifold during operation, extending the service life of the one-way valve and the manifold, fixing the pressure reducing plate by the second spring and the limit block, making it convenient to inspect and replace the pressure reducing plate, thereby improving the maintenance efficiency of the one-way valve.

[0007] As a further preferred embodiment of the present technical solution: the main body assembly further includes a first connecting sleeve and a second connecting sleeve, one end of the valve body is fixedly connected to the first connecting sleeve, and the end of the valve body away from the first connecting sleeve is fixedly connected to the second connecting sleeve.

[0008] As a further preferred embodiment of the present technical solution: a liquid inlet is provided inside the first connecting sleeve, and the liquid inlet is communicated with the valve body.

[0009] As a further preferred embodiment of the present technical solution: a liquid outlet is provided inside the second connecting sleeve, and the liquid outlet is communicated with the valve body.

[0010] As a further preferred embodiment of the present technical solution: a retaining ring is fixedly connected to the inner side wall of the valve body.

[0011] As a further preferred embodiment of the present technical solution: a first spring is fixedly connected to one side of the retaining ring, a valve core is fixedly connected to one end of the first spring, and the valve core is slidably connected to the inner wall of the valve body.

[0012] As a further preferred embodiment of the present technical solution: through grooves are symmetrically provided on the outer side wall of the valve core.

[0013] As a further preferred embodiment of the present technical solution: one end of the valve core is fixedly connected to a sealing ring.

[0014] Advantages of the utility model: The utility model installs a pressure reducing plate at the liquid inlet and uses the through holes on the pressure reducing plate to limit the flow of the fluid in the fire extinguishing system, thereby reducing the pressure on the one-way valve and the collecting pipe during operation, extending the service life of the one-way valve and the collecting pipe, fixing the pressure reducing plate through the action of the spring and the limit block, facilitating the inspection and replacement of the pressure reducing plate, and improving the maintenance efficiency of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the valve body of the present utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the first connecting sleeve of the present invention;

[0019] Figure 4 This is an enlarged structural diagram of point A of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of the pressure reducing plate of the present utility model.

[0021] In the figure: 10, main body assembly; 11, valve body; 12, first connecting sleeve; 13, liquid inlet; 14, second connecting sleeve; 15, liquid outlet; 16, retaining ring; 17, first spring; 18, valve core; 19, through groove; 110, sealing ring; 20, pressure reducing assembly; 21, support ring; 22, pressure reducing plate; 23, through hole; 24, groove; 25, second spring; 26, limit block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a liquid one-way valve with a built-in pressure reducing device, comprising a main body assembly 10, the main body assembly 10 comprising a valve body 11, a pressure reducing assembly 20 disposed inside the main body assembly 10, the pressure reducing assembly 20 comprising a support ring 21, a pressure reducing plate 22, a through hole 23, a groove 24, a second spring 25 and a limit block 26;

[0025] A support ring 21 is fixedly connected to the inner wall of the valve body 11, and a pressure reducing plate 22 is provided on one side of the support ring 21. Through holes 23 are evenly opened on the surface of the pressure reducing plate 22, and grooves 24 are evenly opened on the inner wall of the valve body 11. A second spring 25 is fixedly connected to the inner wall of the groove 24, and one end of the second spring 25 is fixedly connected to a limit block 26. The limit block 26 is slidably connected to the inner wall of the groove 24. The support ring 21 can provide support for the pressure reducing plate 22 to ensure that the pressure reducing plate 22 does not move under fluid pressure. The fluid in the fire extinguishing system enters through the liquid inlet 13 and is reduced in pressure by the pressure reducing plate 22 inside the liquid inlet 13. The through hole 23 on the pressure reducing plate 22 is used to limit the flow rate of the fluid in the fire extinguishing system, thereby reducing the pressure on the one-way valve and the manifold during operation, extending the service life of the one-way valve and the manifold. The pressure reducing plate 22 is fixed by the second spring 25 and the limit block 26, which facilitates the inspection and replacement of the pressure reducing plate 22 and improves the maintenance efficiency of the one-way valve.

[0026] In this embodiment, specifically: the main body component 10 also includes a first connecting sleeve 12 and a second connecting sleeve 14, one end of the valve body 11 is fixedly connected to the first connecting sleeve 12, and the end of the valve body 11 away from the first connecting sleeve 12 is fixedly connected to the second connecting sleeve 14, and the outer side walls of the first connecting sleeve 12 and the second connecting sleeve 14 are provided with external threads so as to be installed by threaded matching. When the fire extinguishing system is assembled, the one-way valve is installed in the fire extinguishing system using the first connecting sleeve 12 and the second connecting sleeve 14.

[0027] In this embodiment, specifically: a liquid inlet 13 is provided inside the first connecting sleeve 12 , the liquid inlet 13 is communicated with the valve body 11 , and the fluid enters through the liquid inlet 13 .

[0028] In this embodiment, specifically: a liquid outlet 15 is provided inside the second connecting sleeve 14 , the liquid outlet 15 is communicated with the valve body 11 , and the fluid is discharged through the liquid outlet 15 .

[0029] In this embodiment, specifically: a retaining ring 16 is fixedly connected to the inner side wall of the valve body 11 , and the retaining ring 16 provides support for the first spring 17 so that the valve core 18 is pushed to move by the first spring 17 .

[0030] In this embodiment, specifically: a first spring 17 is fixedly connected to one side of the retaining ring 16, and a valve core 18 is fixedly connected to one end of the first spring 17. The valve core 18 is slidably connected to the inner wall of the valve body 11. When the fluid flows in the forward direction, the valve core 18 is pushed to move, so that sufficient space is created between the valve core 18 and the valve body 11 to ensure normal flow of the fluid. When the fluid does not flow or flows in the reverse direction, the first spring 17 pushes the valve core 18 to closely contact the valve body 11, closing the one-way valve.

[0031] In this embodiment, specifically, through grooves 19 are symmetrically formed on the outer side wall of the valve core 18 , and the decompressed fluid passes through the through grooves 19 and is discharged from the liquid outlet 15 .

[0032] In this embodiment, specifically: one end of the valve core 18 is fixedly connected to a sealing ring 110 , which is used to seal the valve core 18 and the valve body 11 to prevent the fluid from flowing backward through the gap between the valve core 18 and the valve body 11 .

[0033] Working principle or structural principle: When in use, the one-way valve is installed in the fire extinguishing system using the first connecting sleeve 12 and the second connecting sleeve 14. The fluid in the fire extinguishing system enters through the liquid inlet 13 and is decompressed by the pressure reducing plate 22 inside the liquid inlet 13. The through hole 23 on the pressure reducing plate 22 is used to limit the flow of the fluid in the fire extinguishing system, thereby reducing the pressure on the one-way valve and the manifold during operation and extending the service life of the one-way valve and the manifold. The decompressed fluid pushes the valve core 18 to move, and then passes through the valve body 11 and the through groove 19, and is finally discharged from the liquid outlet 15. The pressure reducing plate 22 is fixed by the second spring 25 and the limit block 26, which facilitates the inspection and replacement of the pressure reducing plate 22 and improves the maintenance efficiency of the one-way valve.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid one-way valve with a built-in pressure reducing device, comprising a main body assembly (10), characterized in that: The main body assembly (10) comprises a valve body (11), a pressure reducing assembly (20) is provided inside the main body assembly (10), and the pressure reducing assembly (20) comprises a support ring (21), a pressure reducing plate (22), a through hole (23), a groove (24), a second spring (25), and a limit block (26); The inner side wall of the valve body (11) is fixedly connected to a support ring (21), a pressure reducing plate (22) is provided on one side of the support ring (21), and a surface of the pressure reducing plate (22) is evenly provided with through holes (23), and the inner side wall of the valve body (11) is evenly provided with a groove (24), and the inner side wall of the groove (24) is fixedly connected to a second spring (25), one end of the second spring (25) is fixedly connected to a limit block (26), and the limit block (26) is slidably connected to the inner side wall of the groove (24).

2. A liquid one-way valve with a built-in pressure reducing device according to claim 1, characterized in that: The main body assembly (10) further comprises a first connecting sleeve (12) and a second connecting sleeve (14); one end of the valve body (11) is fixedly connected to the first connecting sleeve (12); and one end of the valve body (11) away from the first connecting sleeve (12) is fixedly connected to the second connecting sleeve (14).

3. A liquid one-way valve with a built-in pressure reducing device according to claim 2, characterized in that: A liquid inlet (13) is provided inside the first connecting sleeve (12), and the liquid inlet (13) is communicated with the valve body (11).

4. A liquid one-way valve with a built-in pressure reducing device according to claim 2, characterized in that: A liquid outlet (15) is provided inside the second connecting sleeve (14), and the liquid outlet (15) is communicated with the valve body (11).

5. The liquid one-way valve with a built-in pressure reducing device according to claim 1, characterized in that: A retaining ring (16) is fixedly connected to the inner side wall of the valve body (11).

6. A liquid one-way valve with a built-in pressure reducing device according to claim 5, characterized in that: One side of the retaining ring (16) is fixedly connected to a first spring (17), one end of the first spring (17) is fixedly connected to a valve core (18), and the valve core (18) is slidably connected to the inner wall of the valve body (11).

7. A liquid one-way valve with a built-in pressure reducing device according to claim 6, characterized in that: The outer side wall of the valve core (18) is symmetrically provided with through grooves (19).

8. The liquid one-way valve with a built-in pressure reducing device according to claim 6, characterized in that: One end of the valve core (18) is fixedly connected to a sealing ring (110).

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