Pressure reducing valve with explosion-proof device

Abstract

The utility model relates to the technical field of pressure reducing valves, and discloses a pressure reducing valve with an explosion-proof device, which comprises a pressure reducing valve main body, a fixing groove is fixedly arranged on the upper end face of the pressure reducing valve main body, and a fixing rod is arranged in the fixing groove. A first opening is formed in the upper end face of a second fixing plate, so that gas can enter an inner cavity below a pressure reduction film through the first opening, the pressure value of the inner cavity below the pressure reduction film is larger than that of an inner cavity above the pressure reduction film, and the pressure reduction film is elastic, so that the pressure reduction film is upwards jacked by the gas pressure; and when the air pressure value of the inner cavity below the pressure reduction film is not enough to support the pressure reduction film, the explosion-proof spring can push the pressure reduction film to support the pressure reduction film downwards, so that the connecting rod is driven to move downwards, and the sealing sleeve blocks the opening II.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a pressure reducing valve with an explosion-proof device. Background Art

[0002] The pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through regulation and automatically maintains a stable outlet pressure by relying on the energy of the medium itself.

[0003] According to the search, Chinese patent literature, announcement number: CN203477496U, discloses a pressure reducing valve device. This solution adds a second liquid outlet to the lower end cover. When the pressure at the liquid inlet is small, the second liquid outlet is blocked by the nut to ensure stable flow. When the pressure at the liquid inlet is large, the nut is detached from the second liquid outlet, and the fluid can flow out from the second liquid outlet. It is applied to other devices in need. Since the second liquid outlet shares the excessive flow and provides a pressure relief channel, the hydraulic pressure of the first liquid outlet is more stable, while saving water flow, and the pressure reducing valve device can adapt to a higher hydraulic working environment, expanding the use range of the pressure reducing valve. However, the device still has defects during use. The device cannot automatically adjust the air pressure value, does not have the effects of reducing the pressure at the outlet, stabilizing the pressure, stabilizing the flow, and reducing the pressure fluctuation at the outlet. In addition, the noise of the air flow is large, affecting the surrounding staff. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a pressure reducing valve with an explosion-proof device. Through the arrangement of a sealing sleeve and an explosion-proof spring, an opening one is opened on the upper end surface of a fixed plate two, so that gas can enter the inner cavity below the pressure reducing membrane through the opening one, and the pressure value of the inner cavity below the pressure reducing membrane is greater than the pressure value of the inner cavity above the pressure reducing membrane. The pressure reducing membrane is elastic, so that the air pressure pushes the pressure reducing membrane upward. When the sealing sleeve is propped up, the opening two will be opened. At this time, the gas in the inner cavity with a large air pressure value will flow back to the place with a small air pressure value, thereby achieving an explosion-proof effect. When the air pressure value of the inner cavity below the pressure reducing membrane is not enough to prop up the pressure reducing membrane, the explosion-proof spring will push the pressure reducing membrane downward to prop it up, thereby driving the connecting rod to move downward, so that the sealing sleeve will block the opening two, and the throttling hole and the guide plate can reduce the noise of the gas flow, thereby solving the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above object, the utility model provides the following technical solution: a pressure reducing valve with an explosion-proof device, comprising a pressure reducing valve body, the upper end surface of the pressure reducing valve body being fixedly provided with a fixing groove, and a fixing rod being provided inside the fixing groove;

[0008] A pressure gauge is installed on the upper end surface of the fixing rod, a mounting plate is fixedly arranged on the lower end surface of the fixing rod, and one end of an explosion-proof spring is installed on the lower end surface of the mounting plate.

[0009] Preferably, a positioning sleeve is fixedly provided at the other end of the explosion-proof spring, and a fixing plate 1 is fixedly provided at the lower end surface of the positioning sleeve.

[0010] Through the above technical solution, the positioning sleeve is provided to prevent the explosion-proof spring from tilting or deflecting during contraction, thereby making the explosion-proof spring more stable during contraction and further improving the stability of the device.

[0011] Preferably, a pressure reducing membrane is installed inside the pressure reducing valve body, and a pressure reducing membrane is fixedly provided at the lower end of the fixing plate 1.

[0012] Through the above technical solution, the decompression membrane is set up, when the air pressure value is too large, the decompression membrane will be pushed upward (as shown in the figure), so that the decompression membrane will be propped up, thereby driving the explosion-proof spring to contract (as shown in the figure).

[0013] Preferably, a fixing plate 2 is integrally provided inside the pressure reducing valve body, and an opening 1 is fixedly provided on the upper end surface of the fixing plate 2.

[0014] Through the above technical solution, opening one is opened on the upper end surface of fixed plate two, so that gas can enter the inner cavity below the pressure reducing membrane through opening one, and the pressure value of the inner cavity below the pressure reducing membrane is greater than the pressure value of the inner cavity above the pressure reducing membrane. The pressure reducing membrane is elastic, so that the air pressure pushes the pressure reducing membrane upward.

[0015] Preferably, one end of a connecting rod is fixedly provided on the lower end surface of the pressure reducing membrane, and a sealing sleeve is fixedly provided on the other end of the connecting rod.

[0016] Through the above technical solution, when the pressure reducing membrane is propped up, it will drive the connecting rod to move upwards, and the connecting rod is connected to the sealing sleeve. When the connecting rod moves upwards, it will drive the sealing sleeve to move upwards.

[0017] Preferably, a second opening is provided on the internal integrated plate of the pressure reducing valve body, and a sealing sleeve is provided inside the second opening.

[0018] Through the above technical solution, when the sealing sleeve moves upward, the opening of the second opening will be opened. At this time, the gas in the inner cavity with a large air pressure value will flow back to the place with a small air pressure value, thereby achieving an explosion-proof effect. When the air pressure value of the inner cavity below the pressure-reducing membrane is not enough to support the pressure-reducing membrane, the explosion-proof spring will push the pressure-reducing membrane downward, thereby driving the connecting rod to move downward, so that the sealing sleeve will block the second opening.

[0019] Preferably, an air outlet is fixedly provided on the right end surface of the pressure reducing valve body, an air inlet is fixedly provided on the left end surface of the pressure reducing valve body, a plurality of throttling holes are opened on the surface of the air outlet, and a plurality of guide plates are fixedly provided on the inner surface of the air outlet.

[0020] Through the above technical solution, the noise of gas flow can be reduced through the throttling hole and the guide plate.

[0021] Compared with the prior art, the utility model provides a pressure reducing valve with an explosion-proof device, which has the following beneficial effects:

[0022] 1. The utility model provides an opening one on the upper end surface of the fixed plate two through the arrangement of a sealing sleeve and an explosion-proof spring, so that gas can enter the inner cavity below the pressure-reducing membrane through the opening one, and the pressure value of the inner cavity below the pressure-reducing membrane is greater than the pressure value of the inner cavity above the pressure-reducing membrane. The pressure-reducing membrane is elastic, so that the air pressure pushes the pressure-reducing membrane upward. When the sealing sleeve is propped up, the opening two will be opened. At this time, the gas in the inner cavity with a large air pressure value will flow back to the place with a small air pressure value, thereby achieving an explosion-proof effect. When the air pressure value of the inner cavity below the pressure-reducing membrane is not enough to prop up the pressure-reducing membrane, the explosion-proof spring will push the pressure-reducing membrane downward, thereby driving the connecting rod to move downward, so that the sealing sleeve will block the opening two.

[0023] 2. The utility model provides a throttle hole and a guide plate, which can reduce the noise of gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the gas flow cross-sectional structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the gas flow cross-sectional structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the air outlet of the utility model.

[0028] Among them: 1. Pressure reducing valve body; 2. Fixing groove; 3. Pressure gauge; 4. Fixing rod; 5. Mounting plate; 6. Explosion-proof spring; 7. Positioning sleeve; 8. Fixing plate 1; 9. Pressure reducing membrane; 10. Air inlet; 11. Air outlet; 12. Connecting rod; 13. Fixing plate 2; 14. Opening 1; 15. Sealing sleeve; 16. Opening 2; 17. Throttle hole; 18. Guide plate. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1:

[0031] like Figure 1-3 As shown, the utility model provides a pressure reducing valve with an explosion-proof device, comprising a pressure reducing valve body 1, a fixing groove 2 is fixedly provided on the upper end surface of the pressure reducing valve body 1, and a fixing rod 4 is provided inside the fixing groove 2;

[0032] The upper end surface of the fixing rod 4 is mounted with a pressure gauge 3 , the lower end surface of the fixing rod 4 is fixedly provided with a mounting plate 5 , and the lower end surface of the mounting plate 5 is mounted with one end of an explosion-proof spring 6 .

[0033] Specifically, a positioning sleeve 7 is fixedly provided at the other end of the explosion-proof spring 6, and a fixing plate 8 is fixedly provided at the lower end surface of the positioning sleeve 7. The advantage is that the positioning sleeve 7 can prevent the explosion-proof spring 6 from tilting or deflecting when contracting, so that the explosion-proof spring 6 is more stable when contracting, and the stability of the device is further improved.

[0034] Specifically, a pressure reducing membrane 9 is installed inside the pressure reducing valve body 1, and a pressure reducing membrane 9 is fixedly arranged at the lower end of the fixing plate 8. The advantage is that the setting of the pressure reducing membrane 9 will push the pressure reducing membrane 9 upward when the air pressure value is too large (such as Figure 2 As shown), the pressure relief membrane 9 will prop up upward, thereby driving the explosion-proof spring 6 to contract (as shown Figure 3 shown).

[0035] Specifically, a fixing plate 13 is integrally provided inside the pressure reducing valve body 1, and an opening 14 is provided on the upper end surface of the fixing plate 13. The advantage is that the opening 14 is provided on the upper end surface of the fixing plate 13, so that gas can enter the inner cavity below the pressure reducing membrane 9 through the opening 14, and the pressure value of the inner cavity below the pressure reducing membrane 9 is greater than the pressure value of the inner cavity above the pressure reducing membrane 9, and the pressure reducing membrane 9 has elasticity, so that the gas pressure pushes the pressure reducing membrane 9 upward.

[0036] Embodiment 2:

[0037] like Figure 1-4As shown, as an improvement to the previous embodiment. Specifically, one end of a connecting rod 12 is fixedly provided on the lower end surface of the pressure reducing membrane 9, and a sealing sleeve 15 is fixedly provided on the other end of the connecting rod 12. The advantage is that when the pressure reducing membrane 9 is propped up, the connecting rod 12 will be driven to move upward, and the connecting rod 12 is connected to the sealing sleeve 15, and when the connecting rod 12 moves upward, the sealing sleeve 15 will be driven to move upward.

[0038] Specifically, the inner integrated plate of the pressure reducing valve body 1 is provided with a second opening 16, and a sealing sleeve 15 is provided inside the second opening 16. The advantage is that when the sealing sleeve 15 moves upward, the second opening 16 will be opened, and the gas in the inner cavity with a large air pressure value will flow back to the place with a small air pressure value, thereby achieving an explosion-proof effect. When the air pressure value of the inner cavity below the pressure reducing membrane 9 is not enough to support the pressure reducing membrane 9, the explosion-proof spring 6 will push the pressure reducing membrane 9 downward to support it, thereby driving the connecting rod 12 to move downward, so that the sealing sleeve 15 blocks the second opening 16.

[0039] Specifically, the right end surface of the pressure reducing valve body 1 is fixedly provided with an air outlet 11, the left end surface of the pressure reducing valve body 1 is fixedly provided with an air inlet 10, a plurality of throttle holes 17 are provided on the surface of the air outlet 11, and a plurality of guide plates 18 are fixedly provided on the inner surface of the air outlet 11. The advantage is that the noise of gas flow can be reduced by the throttle holes 17 and the guide plates 18.

[0040] Working principle: By setting the positioning sleeve 7, the explosion-proof spring 6 can be prevented from tilting or deflecting when contracting, so that the explosion-proof spring 6 is more stable when contracting, and the stability of the device is further improved. The setting of the pressure relief membrane 9 will push the pressure relief membrane 9 upward when the air pressure value is too large (such as Figure 2 As shown), the pressure relief membrane 9 will prop up upward, thereby driving the explosion-proof spring 6 to contract (as shown Figure 3 As shown in the figure, an opening 14 is provided on the upper end surface of the fixing plate 13, so that the gas can enter the inner cavity below the pressure relief membrane 9 through the opening 14, and the pressure value of the inner cavity below the pressure relief membrane 9 is greater than the pressure value of the inner cavity above the pressure relief membrane 9. The pressure relief membrane 9 is elastic, so that the air pressure pushes the pressure relief membrane 9 upward. When the pressure relief membrane 9 is propped up, it will drive the connecting rod 12 to move upward, and the connecting rod 12 is connected to the sealing sleeve 15. When the connecting rod 12 moves upward, it will drive the sealing sleeve 15 to move upward. When the sealing sleeve 15 moves upward, it will open the opening 16. At this time, the gas in the inner cavity with a large air pressure value flows back to the place with a small air pressure value, thereby achieving an explosion-proof effect. When the air pressure value of the inner cavity below the pressure relief membrane 9 is not enough to prop up the pressure relief membrane 9, the explosion-proof spring 6 will push the pressure relief membrane 9 downward to prop it up, thereby driving the connecting rod 12 to move downward, so that the sealing sleeve 15 blocks the opening 16, and the noise of the gas flow can be reduced by the throttle hole 17 and the guide plate 18.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure reducing valve with an explosion-proof device, comprising a pressure reducing valve body (1), characterized in that: A fixing groove (2) is fixedly provided on the upper end surface of the pressure reducing valve body (1), and a fixing rod (4) is provided inside the fixing groove (2); A pressure gauge (3) is mounted on the upper end surface of the fixing rod (4), a mounting plate (5) is fixedly disposed on the lower end surface of the fixing rod (4), and one end of an explosion-proof spring (6) is mounted on the lower end surface of the mounting plate (5).

2. The pressure reducing valve with explosion-proof device according to claim 1, characterized in that: A positioning sleeve (7) is fixedly disposed on the other end of the explosion-proof spring (6), and a fixing plate 1 (8) is fixedly disposed on the lower end surface of the positioning sleeve (7).

3. The pressure reducing valve with explosion-proof device according to claim 2, characterized in that: A pressure reducing membrane (9) is installed inside the pressure reducing valve body (1), and a pressure reducing membrane (9) is fixedly arranged at the lower end of the fixing plate 1 (8).

4. The pressure reducing valve with explosion-proof device according to claim 3, characterized in that: A second fixing plate (13) is integrally provided inside the pressure reducing valve body (1), and an opening (14) is fixedly provided on the upper end surface of the second fixing plate (13).

5. The pressure reducing valve with explosion-proof device according to claim 4, characterized in that: One end of a connecting rod (12) is fixedly disposed on the lower end surface of the pressure reducing membrane (9), and a sealing sleeve (15) is fixedly disposed on the other end of the connecting rod (12).

6. The pressure reducing valve with explosion-proof device according to claim 5, characterized in that: A second opening (16) is provided on the internal integrated plate of the pressure reducing valve body (1), and a sealing sleeve (15) is provided inside the second opening (16).

7. The pressure reducing valve with explosion-proof device according to claim 6, characterized in that: An air outlet (11) is fixedly provided on the right end surface of the pressure reducing valve body (1), an air inlet (10) is fixedly provided on the left end surface of the pressure reducing valve body (1), a plurality of throttling holes (17) are provided on the surface of the air outlet (11), and a plurality of guide plates (18) are fixedly provided on the inner surface of the air outlet (11).

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