Pressure reducing valve of vehicle air pressure regulating system

Abstract

The utility model discloses a pressure reducing valve of a vehicle air pressure regulating system. A valve core assembly is connected with a pressure regulating spring through a diaphragm; a decompression spring is arranged in the sealing connector and makes contact with the valve element assembly, and the elasticity direction of the decompression spring enables the valve element assembly to move, so that the valve port is reduced. Gas is input into the gas inlet of the valve body of the valve body assembly and enters the gas outlet through the valve port of the valve element assembly; and gas enters the cavity of the diaphragm through a small pressure reducing hole formed in the gas outlet. By the adoption of the technical scheme, the requirement that high-pressure 2 MPa sealing is needed when a vehicle uses the pressure reducing valve is met, the problems that in the prior art, a pressure reducing valve is large in size, multiple in part and frequent in air leakage fault are solved, and the fault rate of the whole vehicle is reduced; the requirement that a whole vehicle system is connected with small-air-pressure electronic equipment more safely in the high-pressure environment is met, good safety and development tendency are provided for electric development of a vehicle, and meanwhile the durability of a whole vehicle electronic device can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile brake system pressure control. More specifically, the utility model relates to a pressure reducing valve of a vehicle air pressure regulating system. BACKGROUND

[0002] The pressure reducing valve in the prior art adopts a sealing ring sealing structure, which cannot meet the 2MPa high pressure sealing requirement and cannot achieve the sealing and pressure reducing effect in a high pressure system. Moreover, the structure of the prior art has many parts, large size and complex structure.

[0003] The key words "vehicle, air pressure regulation, system, pressure reducing valve, sealing" are used to search the existing public technical documents, and the following search results are obtained:

[0004] 1. Chinese patent document: "Pressure reducing valve structure for vehicle and vehicle", patent (application) number: 202022980045.3, the technical scheme recorded is:

[0005] "The pressure reducing valve structure for vehicle and vehicle, the pressure reducing valve structure comprises: a primary valve body having a first inlet and a first outlet; a secondary valve body provided on the primary valve body and having a second inlet and a second outlet, wherein a primary pressure reducing module is provided on the primary valve body, a secondary pressure reducing module is provided on the secondary valve body, the secondary valve body and the primary valve body are split type valve bodies, and the second inlet is connected with the first outlet";

[0006] The technical effect recorded is:

[0007] "The pressure reducing valve structure is a split type secondary pressure reducing valve body, which can convert the gas in the first inlet from non-constant pressure to stable pressure in the second outlet, effectively improve the assembly process feasibility of internal parts, has high reliability, compact structure, low cost and easy to realize miniaturization design".

[0008] 2. Chinese patent document: "Vehicle and air pressure regulating valve therein", patent (application) number: 201811191281.8, the technical scheme recorded is:

[0009] Vehicle and its in-vehicle air pressure regulating valve, in-vehicle air pressure regulating valve includes valve body with valve port and soft valve flap for closing the valve port, the upper end of the valve flap is connected with the valve body, the lower end is free end, the valve flap is a flip valve flap which is pushed out by air flow to open the valve port when the in-vehicle air pressure and the outside air pressure difference reaches the critical value, and is inwardly inclined to close the valve port by relying on the weight when the in-vehicle air pressure and the outside air pressure difference is less than the critical value, the flip valve flap is inclined from top to bottom and from inside to outside, the valve port is provided with support ribs forming exhaust grid, the support ribs have rib support surface supporting the flip valve flap upward to prevent the flip valve flap from collapsing when the flip valve flap closes the valve port.

[0010] The technical effect recorded is:

[0011] By setting the support ribs, the middle position of the flip valve flap can be prevented from collapsing, and the situation that the flip valve flap is not uniformly deformed to cause the flip valve flap to be not tightly sealed can be prevented.

[0012] However, the technical solution provided by the above-mentioned disclosed technical document cannot solve the problems and defects actually existing in the prior art, such as "the sealing and pressure reduction effect cannot be achieved in a high-pressure system, and the structure of the prior art has many parts, large size and complex structure". Practical new type content

[0013] The utility model provides a kind of vehicle air pressure regulating system pressure reducing valve, and its purpose is to simplify the structure of pressure reducing valve, reduce volume, reduce mass.

[0014] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0015] The vehicle air pressure regulating system pressure reducing valve of the utility model, including valve body assembly, valve core assembly and upper cover, air inlet and air outlet are arranged on the valve body assembly;

[0016] The valve core assembly is connected with the pressure regulating spring by the diaphragm;The bottom end of the valve body assembly is provided with a sealing joint;

[0017] The sealing joint is connected with the sealing joint threaded hole of the valve body assembly;The sealing joint is provided with a pressure reducing spring, and the pressure reducing spring is in contact with the valve core assembly, and the elastic force direction of the pressure reducing spring is to move the valve core assembly to reduce the valve port;

[0018] Gas is input into the air inlet of the valve body assembly, and the gas enters the air outlet through the valve port of the valve core assembly;The gas enters the cavity of the diaphragm through the pressure reducing small hole arranged at the air outlet.

[0019] The diaphragm is in contact with the bottom end of the pressure regulating spring by the pressure regulating spring lower seat.

[0020] The top end of the pressure regulating spring is fixed in the cavity of the upper cover by the pressure regulating spring upper seat.

[0021] The pressure regulating spring upper seat is elastically adjusted by the hexagonal flat end set screw, which is connected with the pressure regulating screw thread hole at the top end of the upper cover.

[0022] The outer top end of the upper cover is provided with a dustproof cap, which is made of rubber material and seals the pressure regulating screw thread hole.

[0023] The inner end face of the sealing joint is sealed by a sealing ring in the sealing joint screw thread hole of the valve body assembly.

[0024] The upper cover is connected with the valve body assembly by the upper cover fastening bolt.

[0025] The above technical solution solves the need for high pressure 2MPa sealing when the pressure reducing valve is used in a vehicle, and solves the problems of large size, many parts and frequent air leakage of the prior art pressure reducing valve, reduces the whole vehicle failure rate, meets the requirement of connecting small air pressure electronic equipment more safely in a high pressure environment, provides good safety and development trend for the electrification development of the vehicle, and improves the durability of the whole vehicle electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0026] The contents shown in the drawings and the marks in the drawings are briefly described as follows:

[0027] Figure 1 It is a structural schematic diagram of the utility model;

[0028] Figure 2 It is a position schematic diagram of the pressure reducing small hole of the utility model (partly enlarged); Figure 1

[0029] Figure 3 It is a valve port and airflow direction schematic diagram of the utility model.

[0030] The marks in the drawings are:

[0031] 1, dustproof cap, 2, hexagonal flat end set screw, 3, upper cover, 4, pressure regulating spring upper seat, 5, pressure regulating spring, 6, pressure regulating spring lower seat, 7, diaphragm, 8, valve core assembly, 9, sealing ring, 10, pressure reducing spring, 11, sealing joint, 12, valve body assembly, 13, air inlet, 14, air outlet, 15, upper cover fastening bolt, 16, pressure reducing small hole. DETAILED DESCRIPTION

[0032] ​The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0033] The utility model belongs to the field of vehicle parts. Figure 1 、 Figure 2 The structure of the utility model shown is a pressure reducing valve for a vehicle air pressure regulating system, comprising a valve body assembly 12, a valve core assembly 8 and an upper cover 3. An air inlet 13 and an air outlet 14 are provided on the valve body assembly 12.

[0034] The utility model discloses a pressure reducing valve for a vehicle air pressure regulating system, which is a device for reducing the pressure of high-pressure gas and is a valve used for reducing, decompressing and limiting the pressure of air brakes and auxiliary air circuits of commercial vehicles.

[0035] The main connection relationship of the utility model is: the air inlet is connected to the air outlet of the input air source, and the air outlet is connected to the output pipeline.

[0036] In order to solve the problems existing in the prior art and overcome its defects, and to achieve the invention purpose of simplifying the structure of the pressure reducing valve, reducing the volume and lightening the weight, the technical solution adopted by the utility model is as follows:

[0037] like Figure 1 As shown, the vehicle air pressure regulating system pressure reducing valve of the utility model, the valve core assembly 8 is connected to the pressure regulating spring 5 through the diaphragm 7; the bottom end of the valve body assembly 12 is provided with a sealing joint 11;

[0038] The sealing joint 11 is connected to the sealing joint threaded hole of the valve body assembly 12; a pressure relief spring 10 is provided in the sealing joint 11, and the pressure relief spring 10 contacts the valve core assembly 8, and its elastic force is directed to move the valve core assembly 8, thereby reducing the valve opening;

[0039] Gas is input into the air inlet 13 of the valve body of the valve body assembly 12 , and the gas enters the air outlet 14 through the valve port of the valve core assembly 8 ; the gas enters the cavity of the diaphragm 7 through the pressure reducing hole 16 provided at the air outlet 14 .

[0040] like Figure 3 As shown, after the air flow enters the pressure reducing valve from the air inlet 13, it flows downward and then passes through the valve port formed by the lower end of the valve core assembly 8 and the inner end surface (slightly raised) of the valve body assembly 12 to enter the air outlet 14.

[0041] Therefore, the valve core assembly 8 moves upward, reducing and eventually closing the valve port, and the pressure at the air outlet 14 decreases; the valve core assembly 8 moves downward, the valve port becomes larger, and the pressure at the air outlet 14 approaches the pressure at the air inlet 13, which has no decompression effect.

[0042] The utility model discloses a diaphragm structure, solved the demand of high pressure 2MPa sealing when vehicle uses pressure reducing valve, also solved the problem of original pressure reducing valve big, spare part is many, air leakage failure frequently, reduced whole vehicle failure rate. The utility model satisfies the more safe connection small air pressure electronic equipment of high pressure environment whole vehicle system, provides good security and development trend for the electrification development of vehicle, can also improve the durability of whole vehicle electronic device.

[0043] The utility model discloses a diaphragm structure, solved the demand of high pressure 2MPa sealing when vehicle uses pressure reducing valve, also solved the problem of original pressure reducing valve big, spare part is many, air leakage failure frequently, reduced whole vehicle failure rate. The utility model satisfies the more safe connection small air pressure electronic equipment of high pressure environment whole vehicle system, provides good security and development trend for the electrification development of vehicle, can also improve the durability of whole vehicle electronic device.

[0044] Its specific structure is as follows:

[0045] Diaphragm 7 is contacted with the bottom end of pressure regulating spring 5 through pressure regulating spring lower seat 6.

[0046] Diaphragm 7 has certain flexibility and elasticity, can produce certain deformation, and can realize sealing.

[0047] The top end of pressure regulating spring 5 is fixed in the cavity of upper cover 3 through pressure regulating spring upper seat 4.

[0048] The pressure of pressure regulating spring 5 can be regulated according to requirement.

[0049] Pressure regulating spring upper seat 4 is adjusted by elastic force through inner hexagonal flat end lock screw 2, and inner hexagonal flat end lock screw 2 is connected with pressure regulating screw hole at the top end of upper cover 3 in a matched mode.

[0050] The top end of upper cover 3 is provided with dustproof cap 1, dustproof cap 1 is made of rubber material, and dustproof cap 1 seals pressure regulating screw hole.

[0051] The bottom end of valve body assembly 12 is provided with sealing joint 11, sealing joint 11 is connected with sealing joint screw hole of valve body assembly 12 in a matched mode, pressure reducing spring 10 is arranged in sealing joint 11, pressure reducing spring 10 is contacted with valve core assembly 8, and the elastic force direction of pressure reducing spring 10 is to move valve core assembly 8 towards valve port and reduce.

[0052] Dustproof cap 1, inner hexagonal flat end lock screw 2, upper cover 3, pressure regulating spring upper seat 4, pressure regulating spring 5, pressure regulating spring lower seat 6 and diaphragm 7 are arranged on the upper portion of valve body assembly 12.

[0053] Valve core assembly 8, sealing ring 9, spring 10, joint 11 and 1 are arranged on the lower portion of valve body assembly 12.

[0054] Then, upper cover 3 and valve body assembly 12 are connected together through bolt 15.

[0055] The inner end face of the sealing joint 11 is sealed with the sealing ring 9 and the sealing joint threaded hole of the valve body assembly 12.

[0056] The upper cover 3 is connected with the valve body assembly 12 through the upper cover fastening bolt 15.

[0057] The working condition of the utility model is:

[0058] The gas is inputted into the air inlet 13 of the valve body of the valve body assembly 12, and the gas enters the air outlet 14 through the valve port of the valve core assembly 8; if the pressure of the gas is too large, the gas enters the cavity below the diaphragm 7 through the pressure reducing small hole 16 at the air outlet 14, and the volume of the cavity below the diaphragm 7 increases with the increase of the gas pressure value entering the cavity; the diaphragm 7 can only be deformed upward, the valve core assembly 8 moves upward under the action of the pressure difference between the air inlet 13 and the air outlet 14, the valve port is sealed, and the gas pressure of the air outlet 14 is reduced.

[0059] The gas of the air inlet 13 cannot enter the air outlet 14 through the valve port, and the gas pressure of the air outlet 14 is stable.

[0060] The working principle of the utility model is:

[0061] When the pressure of the air inlet 13 and the air outlet 14 is normal, the valve port on the passage from the air inlet 13 to the air outlet 14 is open, therefore, the gas pressure of the air outlet 14 is basically equal to the pressure of the air inlet 13; the valve core assembly 8 is located at a lower position in the valve port, and the lower end portion cannot block the valve port; at this time, the relative elastic force of the pressure regulating spring 5 and the pressure reducing spring 10 in the reset state is balanced.

[0062] If the gas pressure of the air outlet 14 is not large, due to the small diameter of the pressure reducing small hole 16, the gas of the air outlet 14 is difficult to enter the cavity below the diaphragm 7, the diaphragm 7 is not deformed upward, the valve port is not reduced, and the pressure reduction is not needed.

[0063] When the air inlet 13 is in the air inlet state, if the gas pressure is too large (exceeds the set pressure), the pressure of the air outlet 14 is reduced by reducing or even closing the valve port on the passage from the air inlet 13 to the air outlet 14, and when the pressure of the air outlet 14 reaches the set value, the relative elastic force of the pressure regulating spring 5 and the pressure reducing spring 10 reaches a new balance state;

[0064] The reduction or even closing of the valve port is realized by the rising of the valve core assembly 8. Why does the valve core assembly 8 rise? This is because the pressure reducing small hole 16 is arranged at the air outlet 14, and the function of the small hole is:

[0065] When the gas pressure of the inlet 13 is too large, the pressure at the outlet 14 is increased, the high-pressure gas can overcome the damping of the pressure relief small hole 16, enter the cavity below the diaphragm 7 through the pressure relief small hole 16, the volume of the cavity is increased, the diaphragm 7 is deformed upward, the middle part of the diaphragm 7 is pressed upward by the pressure regulating spring lower seat 6, and the pressure regulating spring 5 is compressed, and then the elastic force of the pressure regulating spring 5 is overcome (the original elastic force balance of the two springs is broken);At the same time, the valve core assembly 8 can move upward under the action of the pressure relief spring 10, so that the valve port is reduced, and the gas pressure of the outlet 14 is reduced, and the elastic force of the pressure regulating spring 5 and the pressure relief spring 10 is balanced in the new state, and the pressure relief and pressure limiting purposes are achieved.

[0066] The gas enters the outlet 14 through the valve port, and enters the cavity below the diaphragm 7 through the pressure relief small hole 16. The volume of the cavity below the diaphragm 7 is increased with the increase of the pressure of the cavity, the cavity is increased, the diaphragm 7 is deformed upward, the valve core assembly 8 is moved upward, the valve port is reduced until closed, the gas of the inlet 13 cannot enter the outlet 14 through the valve port, and the gas pressure of the outlet 14 is stable, thereby achieving the effect of pressure relief and pressure limiting.

[0067] Therefore, the diameter of the pressure relief small hole 16 is very small, generally below 0.5mm, and the gas pressure is not large, so it is difficult to pass through the hole, and the pressure difference between the two ends of the hole is large. Only when the gas pressure is too large, can the damping be overcome, and part of the gas can pass through. Since the small hole is difficult to process, the arrangement of the hole should be convenient for processing

[0068] The improvements of the utility model mainly include:

[0069] 1、The improved structure uses the structure of valve core, pressure relief small hole and diaphragm, under the action of pressure difference, the diaphragm is deformed by pressure to increase the space, thereby controlling the up-down movement of the valve core, controlling the size of the valve port, and achieving the sealing effect;The function of pressure relief is achieved by controlling the size of the valve port through the diaphragm, which reduces the types and quantity of parts and ensures the safety and reliability of the product;

[0070] 2、The improved structure uses a copper valve core, which can withstand high pressure sealing, is small and exquisite, stable and durable, and has good pressure resistance;

[0071] 3、The improved structure uses differential pressure sealing, the sealing force increases with the increase of the gas pressure of the inlet, the sealing performance is more stable, and the overall size of the valve body is reduced, so that the overall appearance of the product has plasticity.

[0072] After the above improvement, the improved valve can not only meet the needs of commercial vehicle high-pressure environment pressure relief function, but also meet the needs of commercial vehicle simple, small and portable function.

[0073] The utility model solves the problems and achieves the technical effects: based on the principle of satisfying high pressure seal, energy saving, portable, on the basis of satisfying pressure reducing valve performance, design a more simple, more stable pressure reducing valve, can satisfy the high pressure seal demand of commercial vehicle use, and small, light in quality, few parts, simple structure, convenient to use.

[0074] The utility model has been described above in conjunction with the drawings, obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various non-essential improvements of the method concept and technical scheme of the utility model are adopted, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A pressure reducing valve of a vehicle pressure regulating system, comprising a valve body assembly (12), a valve core assembly (8) and an upper cover (3), an inlet (13) and an outlet (14) being arranged on the valve body assembly (12); characterized in that: the valve core assembly (8) is connected with a pressure regulating spring (5) through a diaphragm (7); a sealing joint (11) is arranged at the bottom end of the valve body assembly (12); the sealing joint (11) is connected with the sealing joint threaded hole of the valve body assembly (12) in a matched manner; a pressure reducing spring (10) is arranged in the sealing joint (11), the pressure reducing spring (10) is in contact with the valve core assembly (8), and the elastic force direction of the pressure reducing spring (10) is to move the valve core assembly (8) so as to reduce the valve port; gas is input into the inlet (13) of the valve body of the valve body assembly (12), and the gas enters the outlet (14) through the valve port of the valve core assembly (8); the gas enters the cavity of the diaphragm (7) through the pressure reducing small hole (16) arranged at the outlet (14).

2. The pressure reducing valve for a vehicle air conditioning system according to claim 1, characterized by: the diaphragm (7) is in contact with the bottom end of the pressure regulating spring (5) through a pressure regulating spring lower seat (6).

3. The pressure reducing valve for a vehicle air conditioning system according to claim 1, characterized by: the top end of the pressure regulating spring (5) is fixed in the cavity of the upper cover (3) through a pressure regulating spring upper seat (4).

4. The pressure reducing valve for a vehicle air conditioning system according to claim 3, characterized by: the pressure regulating spring upper seat (4) is adjusted in elasticity through an inner hexagonal flat end set screw (2); the inner hexagonal flat end set screw (2) is connected with the pressure regulating threaded hole at the top end of the upper cover (3) in a matched manner.

5. The pressure reducing valve for a vehicle air conditioning system according to claim 4, characterized by: a dustproof cap (1) is arranged at the outer top end of the upper cover (3); the dustproof cap (1) is made of rubber material; the dustproof cap (1) seals the pressure regulating threaded hole.

6. The pressure reducing valve for a vehicle air conditioning system according to claim 1, characterized by: the inner end face of the sealing joint (11) and the sealing joint threaded hole orifice of the valve body assembly (12) are sealed by a sealing ring (9).

7. The pressure reducing valve for a vehicle air conditioning system according to claim 1, characterized by: the upper cover (3) is connected with the valve body assembly (12) through an upper cover fastening bolt (15).

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