Small pressure reducing valve
By designing the structure of the knob adjustment rod downward spring seat in a small pressure reducing valve, changing the pressure of the connecting spring, the problem of weakening of elastic force after the spring is used for a long time, the spring coefficient is adjusted, and the cost of use is reduced.
Patent Information
- Application Number
- CN202422121156.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The springs of existing small pressure reducing valves have been used for a long time, and the elastic force is weakened and the spring coefficient cannot be changed, resulting in frequent valve replacement, which increases the cost of use.
A small pressure reducing valve is designed to press down the spring seat through the knob adjustment rod, change the pressure of the connecting spring, so that the pressure difference between the two springs of the piston press down the valve core and the valve core return spring reaches the required pressure, thereby changing the spring coefficient.
It effectively solves the problem of weakening elastic force caused by long-term use of springs, avoids the need for frequent valve replacement, and reduces the cost of use.
Smart Images
Figure CN222910892U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of small pressure reducing valves, and particularly relates to a small pressure reducing valve. Background Technique
[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a required outlet pressure and relies on the energy of the medium itself to automatically maintain the stability of the outlet pressure. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow velocity and the kinetic energy of the fluid are changed, resulting in different pressure losses, so as to achieve the purpose of pressure reduction. Then, relying on the adjustment of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the spring force, so that the pressure behind the valve remains constant within a certain error range. However, there are still areas that need improvement, specifically as follows: After the spring is used for a long time, the elastic force of the spring will weaken. Therefore, the spring coefficient cannot be changed, and a new small pressure reducing valve needs to be replaced, which undoubtedly increases the use cost.
[0003] To sum up, the utility model solves the above-mentioned problems by designing a small pressure reducing valve. Content of the Utility Model
[0004] The purpose of the utility model is to provide a small pressure reducing valve to solve the problems put forward in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solutions:
[0006] A small pressure reducing valve includes a valve body. A right cavity and a left cavity are arranged in the inner cavity of the valve body. The right cavity and the left cavity are separated by a partition into independent cavities. A hollow bolt is threadedly connected inside the right cavity. A valve core positioning through hole is opened at the center of the partition. A valve core is slidably connected left and right inside the valve core positioning through hole. One end of the valve core penetrates into the inner cavity of the left cavity and acts on a piston. The other end of the valve core extends into the inner cavity of the bolt and is equipped with a valve core return spring. The other end of the valve core return spring is connected inside the bolt. An O-ring is arranged at the connection between the bolt and the right cavity. A V-ring is sleeved on the outer wall of the piston in the left cavity. The left end of the piston in the left cavity is connected to a spring seat through a connecting spring. An installation seat is installed at the port of the left cavity at the left end of the valve body. An adjusting rod is threadedly connected to the installation seat. One end of the adjusting rod penetrates into the left cavity and acts on the spring seat.
[0007] As a preferred scheme of the utility model, a P port communicating with the right cavity is opened on the bolt. An R hole communicating with the valve core positioning through hole is opened on the outer wall of the valve body. An adjusting knob is threadedly connected to the R hole.
[0008] As a preferred embodiment of the present utility model, the valve core positioning through hole is a Q hole, and a conical positioning sleeve is fixedly arranged on the valve core and located in the right cavity. The conical positioning sleeve is integrally formed with the valve core. The diameter of the conical positioning sleeve is larger than the diameter of the Q hole. The conical surface of the conical positioning sleeve is an S surface, and the S surface faces the inside of the Q hole.
[0009] As a preferred embodiment of the present utility model, the conical positioning sleeve is slidably connected to the hollow inner cavity of the bolt in the left and right directions, and the cooperation mode between the valve core and the inner wall of the Q hole is clearance fit.
[0010] As a preferred embodiment of the present utility model, the outer walls of the piston and the spring seat are respectively in clearance fit with the inner wall of the left cavity of the valve body. An annular groove is correspondingly formed on the outer wall of the piston for the V-ring. The cooperation mode between the V-ring and the annular groove is interference fit, and the outer wall of the V-ring contacts the inner wall of the left cavity.
[0011] Compared with the prior art, the beneficial effects of the present utility model are:
[0012] In the present utility model, by pressing down the spring seat with the knob adjusting rod to change the connection spring pressure, the pressure difference between the two springs of the piston pressing down the valve core and the valve core return spring is the required pressure, that is, changing the spring coefficient, effectively solving the problem that the elastic force of the spring will weaken after long-term use, so the spring coefficient cannot be changed. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic cross-sectional structure view of the whole of the present utility model;
[0014] Figure 2 is a schematic three-dimensional assembled structure view of the present utility model;
[0015] Figure 3 For the present utility model Figure 2 exploded structure view.
[0016] In the figure: 1. Valve body; 2. Bolt; 3. Valve core; 4. Piston; 5. Valve core return spring; 6. O-ring; 7. V-ring; 8. Connection spring; 9. Spring seat; 10. Mounting seat; 11. Adjusting rod; 12. Pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.
[0018] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.
[0019] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0021] For the embodiments, please refer to Figures 1-3 The present utility model provides a technical solution:
[0022] A small pressure reducing valve includes a valve body 1. A right cavity and a left cavity are arranged in the inner cavity of the valve body 1. The right cavity and the left cavity are separated by a partition into independent cavities. A hollow bolt 2 is threadedly connected inside the right cavity. A valve core positioning through hole is opened at the center of the partition. A valve core 3 is slidably connected left and right inside the valve core positioning through hole. One end of the valve core 3 penetrates into the inner cavity of the left cavity and acts on a piston 4. The other end of the valve core 3 extends into the inner cavity of the bolt 2 and is equipped with a valve core return spring 5. The other end of the valve core return spring 5 is connected in the inner cavity of the bolt 2. An O-ring 6 is arranged at the connection between the bolt 2 and the right cavity. A V-ring 7 is sleeved on the outer wall of the piston 4 in the left cavity. The left end of the piston 4 in the left cavity is connected to a spring seat 9 through a connecting spring 8. An installation seat 10 is installed at the port of the left cavity at the left end of the valve body 1. An adjusting rod 11 is threadedly connected to the installation seat 10. One end of the adjusting rod 11 penetrates into the left cavity and acts on the spring seat 9.
[0023] As a preferred embodiment of the present utility model: A P port communicating with the right cavity is opened on the bolt 2. An R hole communicating with the valve core positioning through hole is opened on the outer wall of the valve body 1. A pressure gauge 12 is threadedly connected to the R hole.
[0024] As a preferred embodiment of the present utility model: the valve core positioning through hole is the Q hole. A conical positioning sleeve is fixedly arranged on the valve core 3 and located in the right cavity. The conical positioning sleeve is integrally formed with the valve core 3. The diameter of the conical positioning sleeve is larger than the diameter of the Q hole. The conical surface of the conical positioning sleeve is the S surface, and the S surface faces the inside of the Q hole.
[0025] As a preferred embodiment of the present utility model: the conical positioning sleeve is slidably connected left and right in the hollow inner cavity of the bolt 2, and the matching mode between the valve core 3 and the inner wall of the Q hole is clearance fit.
[0026] As a preferred embodiment of the present utility model: the outer walls of the piston 4 and the spring seat 9 are respectively in clearance fit with the inner wall of the left cavity of the valve body 1. An annular groove is correspondingly provided on the outer wall of the piston 4 for the V-ring 7. The matching mode between the V-ring 7 and the annular groove is interference fit, and the outer wall of the V-ring 7 contacts the inner wall of the left cavity.
[0027] The working process of the present utility model: Figure 1 In the figure, A is the S surface, B is the R hole, and C is the Q hole. Compressed air enters from the P port of the bolt 2, passes through the Q hole of the valve body 1, and flows out of the threaded hole R hole of the valve body 1; the knob adjusting rod 11 presses down the spring seat 6 to change the pressure of the connecting spring 8, so that the piston 4 presses down the valve core 3 and the valve core return spring 5. The pressure difference between the two springs is the required pressure, that is, the spring coefficient is changed. The Q hole of the valve body 1 and the S surface of the valve core 3 are matched to control the opening and closing of the air flow.
[0028] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A small pressure reducing valve, comprising a valve body (1), characterized in that: The inner cavity of the valve body (1) is provided with a right cavity and a left cavity, wherein the right cavity and the left cavity are divided into mutually independent cavities by a partition, the inner thread of the right cavity is connected to a hollow bolt (2), a valve core positioning through hole is opened at the center of the partition, and a valve core (3) is connected to the inner cavity of the valve core positioning through hole so as to slide left and right, wherein one end of the valve core (3) penetrates into the inner cavity of the left cavity and acts on the piston (4), and the other end of the valve core (3) extends into the inner cavity of the bolt (2) and is equipped with a valve core reset spring (5), wherein the other end of the valve core reset spring (5) is connected to the inner cavity of the bolt (2). The valve body (1) is connected to the inner cavity of the bolt (2); an O-ring (6) is provided at the connection between the bolt (2) and the right cavity; a V-ring (7) is sleeved on the outer wall of the piston (4) in the left cavity; the left end of the piston (4) is connected to a spring seat (9) through a connecting spring (8) in the left cavity; a mounting seat (10) is installed at the left end of the valve body (1) and at the port of the left cavity; an adjusting rod (11) is threadedly connected to the mounting seat (10), wherein one end of the adjusting rod (11) passes through the left cavity and acts on the spring seat (9).
2. A small pressure reducing valve according to claim 1, characterized in that: The bolt (2) is provided with a P port connected to the right cavity, and the outer wall of the valve body (1) is provided with an R hole which is connected to the valve core positioning through hole, and the R hole is threadedly connected to a pressure gauge (12).
3. A small pressure reducing valve according to claim 1, characterized in that: The valve core positioning through hole is a Q hole. A conical positioning sleeve is fixedly arranged on the valve core (3) and located in the right cavity. The conical positioning sleeve and the valve core (3) are integrally formed. The diameter of the conical positioning sleeve is greater than the diameter of the Q hole. The conical surface of the conical positioning sleeve is an S surface, and the S surface faces the inside of the Q hole.
4. A small pressure reducing valve according to claim 3, characterized in that: The conical positioning sleeve is slidably connected to the hollow inner cavity of the bolt (2) from left to right, and the valve core (3) and the inner wall of the Q hole are matched in a clearance fit.
5. A small pressure reducing valve according to claim 1, characterized in that: The outer walls of the piston (4) and the spring seat (9) are respectively fitted with the inner wall of the left cavity of the valve body (1) in a clearance fit manner, and the outer wall of the piston (4) is provided with an annular groove corresponding to the V-ring (7), wherein the V-ring (7) and the annular groove are fitted in an interference fit manner, and the outer wall of the V-ring (7) is in contact with the inner wall of the left cavity.