Pressure reducing valve easy to overhaul

Abstract

A pressure reducing valve easy to overhaul belongs to the technical field of pressure reducing valves. The diaphragm is arranged in the limiting counter bore of the lower shell, and the diaphragm can be tightly pressed in the limiting counter bore by utilizing the downward pressure generated in the rotating process of the upper shell, so that the diaphragm and the limiting counter bore are sealed, and the diaphragm and the limiting counter bore can be sealed without using a tool; the rubber layer wraps the upper shell, the upper shell is arranged to be of the big-end-down conical structure, the friction force can be increased through the rubber layer, and therefore the upper shell can be conveniently screwed by hands, and operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure reducing valves, and in particular relates to an easy-to-maintain pressure reducing valve. Background Art

[0002] The pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure by adjusting, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. In order to ensure the sealing during the assembly process, the pressure reducing valve of the prior art usually uses tools such as wrenches to rotate and tighten the upper and lower shells. Therefore, in the subsequent maintenance process, the pressure reducing valve needs to be opened for maintenance with tools, so the maintenance process is relatively cumbersome. Summary of the invention

[0003] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides an easy-to-maintain pressure reducing valve.

[0004] The above technical problems of the utility model are mainly solved by the following technical solutions: an easy-to-maintain pressure reducing valve, comprising a lower shell and an upper shell, a pressure-relief chamber is provided at the upper end of the lower shell, a mounting hole is provided at the middle position of the pressure-relief chamber, a limiting countersunk hole is provided on the upper eaves of the lower shell, a diaphragm is provided on the limiting countersunk hole, the diaphragm comprises a metal block located at the center, the edge of the diaphragm is embedded in the limiting countersunk hole, a lower pressing block is provided in the mounting hole, the lower pressing block is threadedly sealed with the mounting hole, and the A tapered hole is provided in the middle position of the lower pressure block, and a push rod is provided in the tapered hole. The push rod is a cone that matches the tapered hole. A push spring is provided at the lower end of the fixed rod to push the push rod upward. The upper end of the fixed rod passes through the tapered hole of the lower pressure block and presses against the metal block of the diaphragm. The lower end of the upper shell is threadedly connected to the upper end of the lower shell. A downward pressure spring is provided at the center position inside the upper shell. The upper end of the downward pressure spring is fixedly connected to the inner wall of the upper shell, and the lower end of the downward pressure spring presses against the metal block of the diaphragm. The upper shell is covered with a rubber layer.

[0005] Preferably, the upper shell adopts a cone shape that is smaller at the top and larger at the bottom.

[0006] Preferably, the diaphragm is made of rubber.

[0007] Preferably, an inlet channel and an outlet channel are provided on the lower shell body at the lower side of the pressure relief chamber.

[0008] Preferably, the inlet channel is communicated with the mounting hole.

[0009] Preferably, the outlet channel is communicated with the pressure relief chamber.

[0010] The utility model has the beneficial effects of: by placing the diaphragm in the limiting countersunk hole of the lower shell body, the diaphragm can be tightly pressed into the limiting countersunk hole by utilizing the downward pressure generated during the rotation of the upper shell body, thereby achieving a seal between the two, thereby avoiding the use of tools to achieve the sealing of the two; by coating the upper shell body with a rubber layer and setting the upper shell body to a conical structure with a small upper part and a large lower part, the rubber layer can increase the friction force, thereby facilitating the tightening of the upper shell body by hand, thereby facilitating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure: 1. lower shell; 2. upper shell; 3. pressure relief chamber; 4. mounting hole; 5. limit countersunk hole; 6. diaphragm; 7. metal block; 8. downward pressure block; 9. tapered hole; 10. push rod; 11. push spring; 14. downward pressure spring; 16. inlet channel; 17. outlet channel; 18. rubber layer. DETAILED DESCRIPTION

[0013] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0014] Embodiment: An easily repairable pressure reducing valve, such as Figure 1 As shown, it includes a lower shell 1 and an upper shell 2, the upper end of the lower shell 1 is provided with a pressure-relief chamber 3, the middle position of the pressure-relief chamber 3 is provided with a mounting hole 4, the upper eaves of the lower shell 1 is provided with a limiting countersunk hole 5, the limiting countersunk hole 5 is provided with a diaphragm 6, the diaphragm 6 includes a metal block 7 located at the center, the edge of the diaphragm 6 is embedded in the limiting countersunk hole 5, a lower pressing block 8 is provided in the mounting hole 4, the lower pressing block 8 is threadedly sealed with the mounting hole 4, a tapered hole 9 is provided in the middle position of the lower pressing block 8, and a A push rod 10 is a cone-shaped rod that matches the tapered hole 9. The lower end of the push rod 10 is provided with a push spring 11 that pushes the push rod 10 upward. The upper end of the push rod 10 passes through the tapered hole 9 of the lower pressure block 8 and abuts against the metal block 7 of the diaphragm 6. The lower end of the upper shell 2 is threadedly connected to the upper end of the lower shell 1. A downward pressure spring 14 is provided at the center position inside the upper shell 2. The upper end of the downward pressure spring 14 is fixedly connected to the inner wall of the upper shell 2, and the lower end of the downward pressure spring 14 abuts against the metal block 7 of the diaphragm 6. The upper shell 2 is covered with a rubber layer 18.

[0015] The upper shell 2 is in a tapered shape with a small top and a large bottom, the diaphragm 6 is made of rubber, and an inlet channel 16 and an outlet channel 17 are provided on the lower shell 1 at the lower side of the pressure relief chamber 3. The inlet channel 16 is connected to the mounting hole 4, and the outlet channel 17 is connected to the pressure relief chamber 3.

[0016] Principle of the utility model: when in use, the upper shell 2 is connected to the lower shell 1 by hand-tightening. During the rotation process, the upper shell 2 is pressed downward to press the diaphragm 6 into the limiting countersunk hole 5 to form a seal, and the inlet channel 16 of the pressure reducing valve is connected to the air source. When the upper shell 2 is rotated and connected to the lower shell 1, the downward pressure spring 14 will drive the diaphragm 6 to be pressed downward, and the downward pressure of the diaphragm 6 will drive the push rod 10 to slide down, so that a gap is formed between the push rod 10 and the tapered hole 9, so that the high-pressure gas or liquid in the inlet channel 16 enters the pressure-relief chamber 3 and is discharged through the outlet channel 17, completing the conversion between high pressure and low pressure.

[0017] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model should be considered to belong to the protection scope of the present utility model.

Claims

1. An easily repairable pressure reducing valve, comprising a lower housing (1) and an upper housing (2), characterized in that: A pressure-relief chamber (3) is provided at the upper end of the lower shell (1), a mounting hole (4) is provided in the middle of the pressure-relief chamber (3), a limiting countersunk hole (5) is provided on the upper eaves of the lower shell (1), a diaphragm (6) is provided on the limiting countersunk hole (5), the diaphragm (6) comprises a metal block (7) located at the center, the edge of the diaphragm (6) is embedded in the limiting countersunk hole (5), a lower pressing block (8) is provided in the mounting hole (4), the lower pressing block (8) is threadedly sealed with the mounting hole (4), a tapered hole (9) is provided in the middle of the lower pressing block (8), a push rod (10) is provided in the tapered hole (9), and the push rod (10) is provided in the push rod (11). The rod (10) is conical and matches the conical hole (9). The lower end of the push rod (10) is provided with a push spring (11) for pushing the push rod (10) upward. The upper end of the push rod (10) passes through the conical hole (9) of the lower pressure block (8) and abuts against the metal block (7) of the diaphragm (6). The lower end of the upper shell (2) is threadedly connected to the upper end of the lower shell (1). A downward pressure spring (14) is provided at the center position inside the upper shell (2). The upper end of the downward pressure spring (14) is fixedly connected to the inner wall of the upper shell (2). The lower end of the downward pressure spring (14) abuts against the metal block (7) of the diaphragm (6). The upper shell (2) is covered with a rubber layer (18).

2. The easy-to-maintain pressure reducing valve according to claim 1, characterized in that: The upper shell (2) is in a tapered shape that is smaller at the top and larger at the bottom.

3. The easy-to-maintain pressure reducing valve according to claim 1, characterized in that: The diaphragm (6) is made of rubber.

4. The easy-to-maintain pressure reducing valve according to claim 1, characterized in that: An inlet channel (16) and an outlet channel (17) are provided on the lower shell (1) at the lower side of the pressure relief chamber (3).

5. The easily repairable pressure reducing valve according to claim 4, characterized in that: The inlet channel (16) is in communication with the mounting hole (4).

6. The easy-to-maintain pressure reducing valve according to claim 4, characterized in that: The outlet channel (17) is in communication with the pressure relief chamber (3).

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