Floating piston type pressure reducing valve
By designing a floating piston pressure reducing valve, the problems of high production costs and high processing precision requirements are solved, enabling low-cost mass production and high-sensitivity pressure regulation, and ensuring the sealing and stability of the equipment.
Patent Information
- Application Number
- CN202520566216.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing pressure reducing valves have high production costs and require high processing precision, and the durability of rubber diaphragm type pressure regulating pistons is poor.
The design adopts a floating piston type, where the pressure regulating piston and the support valve are no longer fixedly connected. The piston's up and down movement is controlled by a pre-pressure regulating device, and multiple sealing rings are set to ensure sealing and flexible movement. Combined with a detachable structure, the machining accuracy requirements are reduced.
It reduces production costs, improves pressure regulation sensitivity and sealing performance, is suitable for mass production, and ensures stable operation of the equipment.
Smart Images
Figure CN223740025U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a floating piston type pressure reducing valve in the technical field of vehicle pressure reducing valve. BACKGROUND
[0002] Most of the pressure reducing valve structures on the market, the pressure regulating piston and the shaft valve are usually integral, which requires high machining precision and coaxiality, and the pressure regulating piston part of another pressure reducing valve is made into a rubber diaphragm type, but the durability of the rubber diaphragm is not high, resulting in high production cost and short service life of the pressure reducing valve in reality. SUMMARY
[0003] In order to solve the above-mentioned defects, the utility model provides a floating piston type pressure reducing valve, solves the problems of high production cost and high machining precision.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] A floating piston type pressure reducing valve, including pressure regulating cover and valve body, the pressure regulating cover and the valve body fixed connection form the inside of the cavity from top to bottom in turn set up pre-regulating device, pressure regulating piston, shaft valve and valve spring, the pre-regulating device includes pressure regulating bolt, pressure regulating seat and pressure regulating spring, the pre-regulating device passes through the pressure regulating bolt rotation and promotes the pressure regulating seat to compress the pressure regulating spring to control the pressure regulating piston up and down movement, the shaft valve is inserted in the pressure regulating piston intermediate position, and with the valve body forms a gas valve port, the gas valve port with the air inlet and the air outlet set up on the valve body is communicated.
[0006] As the utility model is preferred, the pressure regulating cover and the valve body are fixedly connected through bolts.
[0007] As the utility model is preferred, the bottom of the valve body is provided with a detachable plug body, and abuts against the valve spring.
[0008] As the utility model is preferred, the first sealing ring is arranged between the pressure regulating piston and the valve body, the second sealing ring is arranged between the shaft valve and the valve body, and the third sealing ring is arranged between the plug body and the valve body.
[0009] As the utility model is preferred, the fourth sealing ring is arranged between the shaft valve and the pressure regulating piston.
[0010] As the utility model is preferred, the pressure regulating cover is further provided with a pressure relief port for pressure relief.
[0011] The above-mentioned technical scheme has the beneficial effects:
[0012] The design is a floating type in the case of guaranteeing the service life of the piston type, and the pressure regulating piston is not fixedly connected with the pivot valve, so that the machining precision requirement is greatly reduced, batch production is facilitated, and production cost is effectively reduced. Meanwhile, the pressure regulating piston and the pivot valve can be linked and matched under the condition of guaranteeing independent and flexible movement, so that the pressure regulating sensitivity of the assembly is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a structural schematic view of an embodiment of the utility model.
[0014] REFERENCE NUMERALS
[0015] 1, pressure regulating cover; 2, valve body; 201, air inlet; 202, air outlet; 3, pre-pressure regulating device; 301, pressure regulating bolt; 302, pressure regulating seat; 303, pressure regulating spring; 4, pressure regulating piston; 5, pivot valve; 6, valve spring; 7, air passage valve port; 8, bolt; 9, plug body; 10, first sealing ring; 11, second sealing ring; 12, third sealing ring; 13, fourth sealing ring; 14, pressure relief port. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0017] REFERENCE Figure 1 A floating piston type pressure reducing valve, comprising a pressure regulating cover and a valve body, a cavity formed by the fixed connection of the pressure regulating cover and the valve body is internally provided with, from top to bottom, a pre-pressure regulating device, a pressure regulating piston, a pivot valve and a valve spring, the pre-pressure regulating device comprises a pressure regulating bolt, a pressure regulating seat and a pressure regulating spring, the pre-pressure regulating device controls the up-and-down movement of the pressure regulating piston by rotating the pressure regulating bolt to push the pressure regulating seat to compress the pressure regulating spring, the pivot valve is inserted into the middle position of the pressure regulating piston and forms an air passage valve port with the valve body, and the air passage valve port is in communication with an air inlet and an air outlet arranged on the valve body.
[0018] According to the above technical solution, Figure 1The assembly is shown to be completed, the pressure regulating piston 4 is designed to be floating, and is no longer fixedly connected with the pivot valve 5, which greatly reduces the machining precision requirement, is beneficial to batch production and effectively reduces the production cost. Meanwhile, the pressure regulating piston 4 and the pivot valve 5 can be linked and matched under the condition of ensuring independent and flexible movement, and the pressure regulating sensitivity of the assembly is greatly improved. The position of the pressure regulating piston 4 can be controlled by rotating the pressure regulating bolt 301 to push the pressure regulating seat 302 to compress the pressure regulating spring 303, so that the preset stroke of the pre-pressure regulating device 3 is achieved, and the gas pressure of the gas outlet 202 is kept at a constant preset value. When the gas pressure of the gas inlet 201 is higher than the set value of the pre-pressure regulating device 3, the gas pressure of the gas inlet 201 pushes the pressure regulating piston 4 to move upward, and at the same time, the pivot valve 5 moves upward along with the pressure regulating piston 4 under the action of the valve spring 6, until the upward movement height of the pressure regulating piston 4 reaches the preset stroke of the pre-pressure regulating device 3, the gas passage valve port 7 is closed, and the gas pressure of the gas outlet 202 is kept at a constant preset value. When the gas pressure of the gas outlet 202 decreases with use, the pre-pressure regulating device 3 pushes the pressure regulating piston 4 to move downward, opens the gas passage valve port 7, and high-pressure gas is supplied to the gas outlet 202 again, so that the gas outlet 202 can keep stable low-pressure auxiliary gas.
[0019] With reference to Figure 1 The pressure regulating cover and the valve body are fixedly connected by bolts.
[0020] By adopting the technical scheme, the pressure regulating cover 1 and the valve body 2 are detachably fixedly connected by the bolts 8, which is convenient for disassembly and installation.
[0021] With reference to Figure 1 The valve body bottom is provided with a detachable plug body, and abuts against the valve spring.
[0022] By adopting the technical scheme, the valve body 2 bottom is provided with the detachable plug body 9, which is convenient for disassembly and installation, and abuts against the valve spring 6 to provide support for the valve spring 6.
[0023] With reference to Figure 1 The pressure regulating piston and the valve body are provided with a first sealing ring, the pivot valve and the valve body are provided with a second sealing ring, and the plug body and the valve body are provided with a third sealing ring.
[0024] By adopting the technical scheme, the first sealing ring 10, the second sealing ring 11 and the third sealing ring 12 are arranged to respectively enhance the sealing performance between the pressure regulating piston 4 and the valve body 2, between the pivot valve 5 and the valve body 2, and between the plug body 9 and the valve body 2, so as to prevent gas leakage and ensure the safety and normal work of the utility model.
[0025] With reference to Figure 1 The pivot valve and the pressure regulating piston are provided with a fourth sealing ring.
[0026] By setting the fourth sealing ring 13, the sealing between the support shaft valve 5 and the pressure regulating piston 4 is ensured, and the pressure regulating sensitivity of the assembly is greatly improved through linkage cooperation under the condition of independent and flexible movement.
[0027] Reference Figure 1 The pressure regulating cover is further provided with a pressure relief port for discharging pressure.
[0028] By setting the pressure relief port 14, the safety and normal work of the utility model are ensured.
[0029] Working principle
[0030] When there is no air pressure or the air pressure is low at the air inlet 201, the pressure regulating piston 4 is pushed downward by the spring force of the pressure regulating bolt 301, the pressure regulating seat 302 and the pressure regulating spring 303, and the pressure regulating piston 4 is pressed downward, so that the support shaft valve 5 is pressed downward, and the air passage valve port 7 is kept in an open state.
[0031] Under normal circumstances, the high-pressure gas of the automobile system enters the valve body 2 through the air inlet 201, passes through the open air passage valve port 7, and is finally output to the low-pressure auxiliary system of the automobile through the air outlet 202.
[0032] When the air pressure of the air inlet 201 is higher than the set value of the pre-pressure regulating device 3, the air pressure of the air inlet 201 pushes the pressure regulating piston 4 upward, and at the same time, the support shaft valve 5 is pushed upward along with the pressure regulating piston 4 under the action of the valve spring 6, until the upward height of the pressure regulating piston 4 reaches the preset stroke of the pre-pressure regulating device 3, the air passage valve port 7 is closed, and the air pressure of the air outlet 202 is kept at a constant preset value.
[0033] When the air pressure of the air outlet 202 decreases with use, the pre-pressure regulating device 3 pushes the pressure regulating piston 4 downward, opens the air passage valve port 7, and the high-pressure gas is supplemented to the air outlet 202 again, so that the air outlet 202 maintains stable low-pressure auxiliary gas.
[0034] In the utility model, unless otherwise clearly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature can be directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.
[0035] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0036] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme of the utility model and the utility model concept, equivalent replacement or change, should be covered in the protection scope of the utility model.
Claims
1. A floating piston pressure reducing valve characterized by, The utility model relates to a pressure regulating valve, including pressure regulating cover (1) and valve body (2), pressure regulating cover (1) and valve body (2) fixed connection form the cavity inside from top to bottom in turn is provided with pre -regulating device (3), pressure regulating piston (4), support shaft valve (5) and valve spring (6), pre -regulating device (3) including pressure regulating bolt (301), pressure regulating seat (302) and pressure regulating spring (303), pre -regulating device (3) is through the rotation pressure regulating bolt (301) pushes pressure regulating seat (302) and compresses pressure regulating spring (303) to control pressure regulating piston (4) up and down movement, support shaft valve (5) is inserted in pressure regulating piston (4) intermediate position, and with valve body (2) forms a gas valve port (7), gas valve port (7) with the air inlet (201) and air outlet (202) of being set up on valve body (2) intercommunication.
2. A floating piston pressure reducing valve according to claim 1, wherein: The pressure regulating cover (1) and the valve body (2) are fixedly connected by a bolt (8).
3. A floating piston pressure reducing valve according to claim 2, wherein: The valve body (2) is provided with a detachable plug (9) at the bottom and abuts against the valve spring (6).
4. A floating piston pressure reducing valve according to claim 3, wherein: A first sealing ring (10) is arranged between the pressure regulating piston (4) and the valve body (2), a second sealing ring (11) is arranged between the support shaft valve (5) and the valve body (2), and a third sealing ring (12) is arranged between the plug (9) and the valve body (2).
5. A floating piston pressure reducing valve according to claim 4, wherein: A fourth sealing ring (13) is arranged between the support shaft valve (5) and the pressure regulating piston (4).
6. A floating piston pressure reducing valve according to claim 1 wherein: The pressure regulating cover (1) is further provided with a pressure relief port (14) for pressure relief.