Valve body structure of pressure reducing valve

Abstract

The utility model discloses a valve body structure of a pressure reducing valve, which relates to the technical field of gas pressure reduction and is characterized by comprising an upper valve body and a lower valve body in threaded connection with the upper valve body, a diaphragm is mounted between the upper valve body and the lower valve body, a low-pressure port, a high-pressure port and an adjusting block are arranged in the lower valve body, and the adjusting block is in running fit with the lower valve body. One end of the adjusting block is fixedly connected with the diaphragm, the end, away from the diaphragm, of the adjusting block abuts against the high-pressure opening, the upper end, located on the diaphragm, of the upper valve body is in threaded connection with an adjusting screw, the lower end of the adjusting screw abuts against an adjusting spring, and the lower end of the adjusting spring is clamped with the diaphragm. According to the pressure reducing valve, the limiting piece connected with the adjusting spring in the clamping mode is arranged on the diaphragm, the limiting piece can play a role in limiting the adjusting spring, and therefore the diaphragm and the adjusting spring cannot be dislocated in the repeated bulging and sinking process of the diaphragm, and an operator can accurately adjust the pressure reducing valve through the adjusting screw.

Description

Technical Field

[0001] This utility model relates to the field of gas pressure reduction technology, and more specifically, to a pressure reducing valve body structure. Background Technology

[0002] A pressure reducing valve is a type of valve that reduces the inlet pressure to a desired outlet pressure by adjusting the pressure, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. It is widely used in many fields such as energy, chemical industry, and gas supply, and is an important piece of equipment to ensure the safe and stable operation of the system. The working principle of the pressure reducing valve is based on the throttling principle in fluid mechanics. By changing the throttling area, the flow velocity and fluid kinetic energy are changed, resulting in pressure loss and thus pressure reduction. At the same time, the pressure fluctuation after the valve is balanced by the control and regulation system, so that it remains constant within the error range.

[0003] The pressure reducing valve has a high-pressure port, a low-pressure port, an adjusting screw, an adjusting spring, a diaphragm, and an adjusting block. During use, loosening the adjusting screw reduces the force exerted by the adjusting spring on the diaphragm, allowing gas to enter the pressure reducing valve through the high-pressure port. This increases the internal pressure, causing the diaphragm to bulge. The diaphragm is fixedly connected to the adjusting block. The bulging of the diaphragm causes the regulating valve to seal the high-pressure port. When the internal pressure decreases, the pressure at the high-pressure port pushes up the adjusting block, causing the diaphragm to sag, allowing high pressure to re-enter the pressure reducing valve. However, since there is no connection between the adjusting spring and the diaphragm, a certain degree of misalignment may occur between them during the long-term bulging and sag process. This can prevent the adjusting screw from effectively regulating the pressure in the pressure reducing valve.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a pressure reducing valve body structure in order to solve the above-mentioned problems.

[0006] The above-mentioned technical objective of this utility model embodiment is achieved through the following technical solution: a pressure reducing valve body structure, including an upper valve body and a lower valve body threadedly connected to the upper valve body, a diaphragm installed between the upper valve body and the lower valve body, a low-pressure port, a high-pressure port and an adjusting block provided in the lower valve body, the adjusting block rotatably engaging with the lower valve body, one end of the adjusting block being fixedly connected to the diaphragm, and the end of the adjusting block away from the diaphragm abutting against the high-pressure port, an adjusting screw threadedly connected to the upper end of the upper valve body located on the diaphragm, the lower end of the adjusting screw abutting against an adjusting spring, and the lower end of the adjusting spring engaging with the diaphragm.

[0007] The present invention is further configured such that: the lower end of the adjusting screw is fixedly connected to an abutment block that abuts against the adjusting spring; the upper valve body is provided with a slot that slides with the abutment block; the upper end of the adjusting spring is engaged with the slot; and the depth of the slot is greater than the length of the adjusting screw.

[0008] The present invention is further configured such that: the adjusting spring includes a horizontal spring coil located at the upper and lower ends and an inclined spring coil located in the middle; the horizontal spring coil located at the upper end is engaged with a slot; and four annularly distributed limiting members are fixedly connected to the upper end of the diaphragm; each limiting member has a limiting groove on its inner side that engages with the horizontal spring coil.

[0009] The present invention is further configured such that: an arc-shaped baffle is fixedly connected to the upper end of the limiting member in the limiting groove.

[0010] The present invention is further configured such that: a support base is fixedly connected to the valve body, the adjusting block is hinged to the support base, and a sealing plug is provided at the end of the adjusting block that abuts against the high pressure port.

[0011] The present invention is further configured such that: a connector is hinged to one end of the adjusting block away from the high-pressure port, and the upper end of the connector is fixedly connected to the diaphragm.

[0012] The present invention is further configured such that: protrusions are provided on both sides of the lower valve body, and through holes are provided at both ends of the diaphragm to engage with the protrusions.

[0013] The present invention is further configured such that both the diaphragm and the limiting member are made of rubber.

[0014] In summary, this utility model has the following beneficial effects:

[0015] By setting a limiting component on the diaphragm that engages with the adjusting spring, the limiting component can limit the adjusting spring, so that the diaphragm will not be misaligned with the adjusting spring during repeated bulging and denting, allowing the operator to make precise adjustments to the pressure reducing valve through the adjusting screw. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the valve body structure of a pressure reducing valve according to the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0018] Figure 3 for Figure 1 A magnified view of B in the middle.

[0019] Reference numerals: 1. Upper valve body; 2. Lower valve body; 3. Slot; 4. Low-pressure port; 5. High-pressure port; 6. Diaphragm; 7. Adjusting block; 8. Adjusting screw; 9. Adjusting spring; 10. Horizontal spring coil; 11. Inclined spring coil; 12. Limiting element; 13. Limiting groove; 14. Baffle; 15. Support base; 16. Sealing plug; 17. Protrusion; 18. Connecting element; 19. Abutment block; 20. Perforation. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] In one possible embodiment, please refer to Figure 1 and Figure 3 As shown, a pressure reducing valve body structure includes an upper valve body 1 and a lower valve body 2 threadedly connected to the upper valve body 1. The lower valve body 2 is provided with a low-pressure port 4, a high-pressure port 5, and an adjusting block 7. The adjusting block 7 is rotatably engaged with the lower valve body 2. High pressure enters from the high-pressure port 5, is reduced in pressure by the pressure reducing valve body, and then outputs through the low-pressure port 4. A diaphragm is installed between the upper valve body 1 and the lower valve body 2. One end of the adjusting block 7 is fixedly connected to the diaphragm 6, and the end of the adjusting block 7 away from the diaphragm 6 abuts against the high-pressure port 5. An adjusting screw 8 is threadedly connected to the upper end of the upper valve body 1 above the diaphragm 6. The lower end of the adjusting screw 8 abuts against an adjusting spring 9, and the lower end of the adjusting spring 9 abuts against the diaphragm 6, thereby reducing pressure. When using the pressure reducing valve, loosening the adjusting screw 8 reduces the force exerted by the adjusting spring 9 on the diaphragm 6, allowing the high pressure to cause the diaphragm 6 to bulge. Adjusting the adjusting screw 8 changes the pressure reduction of the pressure reducing valve. The diaphragm 6 is made of rubber and has a certain deformation capacity, making it easy to bulge and concave under air pressure. The lower valve body 2 has protrusions 17 on both sides, and the two ends of the diaphragm 6 have through holes 20 that engage with the protrusions 17. The engagement between the protrusions 17 and the through holes 20 allows the lower valve body 2 to limit the diaphragm 6, preventing it from falling off during repeated bulging and ensuring the seal between the diaphragm 6 and the lower valve body 2.

[0022] For further details, please refer to Figure 1As shown, the lower end of the adjusting screw 8 is fixedly connected to an abutment block 19 that abuts against the adjusting spring 9. The upper valve body 1 is provided with a slot 3 that slides with the abutment block 19. By providing the slot 3, the contact area between the adjusting screw 8 and the adjusting spring 9 can be increased, causing the adjusting spring 9 to compress. The depth of the slot 3 is greater than the length of the adjusting screw 8, thereby ensuring that the adjusting spring 9 will not separate from the slot 3 when the adjusting screw 8 compresses the adjusting spring 9.

[0023] For further details, please refer to Figure 1 As shown, a support base 15 is fixedly connected inside the valve body 1. The adjusting block 7 is hinged to the support base 15. A connector 18 is hinged to the end of the adjusting block 7 away from the high-pressure port 5. The upper end of the connector 18 is fixedly connected to the diaphragm 6. A sealing plug 16 is provided at the end of the adjusting block 7 that abuts against the high-pressure port 5. The sealing plug 16 abuts against the high-pressure port 5, thus forming a lever principle inside the valve body 1. When the air pressure inside the valve body 1 is too high, the diaphragm 6 bulges up, causing the end connected to it to rise, so that the sealing plug 16 abuts against the high-pressure port 5, preventing high pressure from entering. When the air pressure inside the valve body 1 decreases, the diaphragm 6 becomes concave, causing the end connected to it to fall, causing the sealing plug 16 to disengage from the high-pressure port 5, so that high pressure can continue to enter the valve body 1. The sealing plug 16 can ensure the sealing of the adjusting block 7 against the high-pressure port 5, effectively preventing the continuous inflow of high pressure.

[0024] For further details, please refer to Figure 1 and Figure 2 As shown, the lower end of the adjusting spring 9 is engaged with the diaphragm 6. By engaging the lower end of the adjusting spring 9 with the diaphragm 6, the diaphragm 6 will not misalign with the adjusting spring 9 during repeated bulging and deflection. This allows the operator to precisely adjust the pressure reducing valve using the adjusting screw 8. The adjusting spring 9 includes horizontal spring coils 10 on both sides and an inclined spring coil 11 in the middle. The upper horizontal spring coil 10 is engaged with the slot 3, thereby limiting the upper end of the adjusting spring 9. The upper end of the diaphragm 6 is fixedly connected with four annularly distributed limiting members 12. The inner side of each limiting member 12 has... A limiting groove 13 is provided to engage with the horizontal spring coil 10. The limiting member 12 is also made of rubber, so it can also deform without affecting the normal bulging and denting of the diaphragm 6. The limiting groove 13 and the horizontal spring coil 10 can be engaged by prying it outward, making the engagement of the adjusting spring 9 and the diaphragm 6 simple and convenient. An arc-shaped baffle 14 is fixedly connected to the upper end of the limiting member 12 located in the limiting groove 13. The baffle 14 can further limit the horizontal spring coil 10, making it difficult for the horizontal spring coil 10 to separate from the limiting member 12. Moreover, the arc shape ensures that the baffle 14 will not affect the horizontal spring coil 10 during the engagement process.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure reducing valve body structure, comprising an upper valve body (1) and a lower valve body (2) threadedly connected to the upper valve body (1), characterized in that: A diaphragm (6) is installed between the upper valve body (1) and the lower valve body (2). The lower valve body (2) is provided with a low-pressure port (4), a high-pressure port (5) and an adjusting block (7). The adjusting block (7) is rotatably engaged with the lower valve body (2). One end of the adjusting block (7) is fixedly connected to the diaphragm (6). The end of the adjusting block (7) away from the diaphragm (6) abuts against the high-pressure port (5). An adjusting screw (8) is threadedly connected to the upper end of the upper valve body (1) located on the diaphragm (6). The lower end of the adjusting screw (8) abuts against an adjusting spring (9). The lower end of the adjusting spring (9) is engaged with the diaphragm (6).

2. The valve body structure of a pressure reducing valve according to claim 1, characterized in that: The lower end of the adjusting screw (8) is fixedly connected to an abutment block (19) that abuts against the adjusting spring (9). The upper valve body (1) is provided with a slot (3) that slides with the abutment block (19). The upper end of the adjusting spring (9) is engaged with the slot (3). The depth of the slot (3) is greater than the length of the adjusting screw (8).

3. The valve body structure of a pressure reducing valve according to claim 2, characterized in that: The adjusting spring (9) includes a horizontal spring coil (10) at the upper and lower ends and an inclined spring coil (11) in the middle. The horizontal spring coil (10) at the upper end is engaged with the slot (3). The upper end of the diaphragm (6) is fixedly connected with four annularly distributed limiting members (12). Each limiting member (12) has a limiting groove (13) on its inner side that engages with the horizontal spring coil (10).

4. The valve body structure of a pressure reducing valve according to claim 3, characterized in that: The limiting member (12) is fixedly connected to an arc-shaped baffle (14) at the upper end of the limiting groove (13).

5. The valve body structure of a pressure reducing valve according to claim 1, characterized in that: A support base (15) is fixedly connected inside the valve body (1). The adjusting block (7) is hinged to the support base (15). A sealing plug (16) is provided at the end of the adjusting block (7) that abuts against the high pressure port (5).

6. The valve body structure of a pressure reducing valve according to claim 4, characterized in that: The adjusting block (7) is hinged to a connector (18) at one end away from the high-pressure port (5), and the upper end of the connector (18) is fixedly connected to the diaphragm (6).

7. The valve body structure of a pressure reducing valve according to claim 1, characterized in that: The lower valve body (2) has protrusions (17) on both sides, and the diaphragm (6) has through holes (20) at both ends that engage with the protrusions (17).

8. The valve body structure of a pressure reducing valve according to claim 2, characterized in that: The diaphragm (6) and the limiting member (12) are both made of rubber.

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