Lightweight compact double spring high pressure pressure reducer

Abstract

The present application relates to the field of valves, in particular to a light-weight compact double-spring high-pressure pressure reducer, comprising a valve body, a secondary valve body, a valve core assembly, a valve seat, a diaphragm assembly, a main spring assembly, a secondary spring assembly, a jacking rod and an adjusting hole plate. The valve seat, the valve core assembly, the secondary spring assembly and the adjusting hole plate are installed in the valve body, the diaphragm assembly is installed above the valve body, the main spring assembly is installed above the diaphragm assembly, the jacking rod penetrates through the valve body to connect the diaphragm assembly and the valve core assembly, and the secondary valve body is installed outside the pressure reducer. Multiple sealing rings are provided. The double-spring high-pressure pressure reducer is provided with two-stage pressure reduction structure, and after reasonable distribution of pressure, the required outlet pressure and hydrogen flow are output. The structure is simple, the parts are precise and small, the functions of pressure reduction, flow control and noise reduction are realized, and the pressure reducer has the characteristics of high reliability, miniaturization and light weight, and meets the needs of hydrogen energy devices in limited space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of valves, in particular to a light-weight compact double-spring high-pressure pressure reducer. BACKGROUND

[0002] With the expansion of hydrogen energy application fields, hydrogen storage technology has made great progress. High-pressure gaseous hydrogen storage is one of the common hydrogen storage methods at present. The overall pressure difference from the gas cylinder to the atmospheric environment is high, and a high-pressure pressure reducing device is needed to realize the flow of hydrogen gas at near atmospheric pressure. However, due to the expansion of application fields, high-pressure pressure reducing devices have a trend of miniaturization. For example, in hydrogen energy vehicles or handheld torches, there are restrictions on volume, and the total weight needs to be controlled, so light-weight and miniaturized pressure reducers are needed to meet the needs of limited space hydrogen energy devices.

[0003] Traditional pressure reducers can be divided into piston type and diaphragm type according to the sensing element. The working principle is that the piston or diaphragm is used as the sensing element, and the medium force and spring force acting on the sensing element are balanced, and after one-stage pressure reduction, the required outlet pressure is reached. However, when high-pressure gaseous hydrogen storage is used, the inlet pressure of the pressure reducer exceeds 30MPa G, and the outlet pressure is about 1kPa G, which has the characteristics of high pressure difference and low flow. The traditional pressure reducer has the following problems in use:

[0004] Firstly, high pressure difference working conditions will cause the sensing element of the one-stage pressure reduction structure to have a large diameter, resulting in large overall weight and size of the valve.

[0005] Secondly, low flow hydrogen working conditions will cause the size of the one-stage pressure reduction valve port to be very small, resulting in difficult machining and poor machining precision.

[0006] Thirdly, the inlet and outlet directions of the traditional pressure reducer are perpendicular or at an angle to the spring movement direction, and the valve installation space is large.

[0007] Fourthly, the traditional pressure reducer using a piston structure alone has a small pressure regulating range and poor adjustment ability, and is basically suitable for fixed working conditions. SUMMARY

[0008] The technical problem solved by the present application is to provide a light-weight compact double-spring high-pressure pressure reducer, which reduces high-pressure hydrogen gas to near atmospheric pressure and provides stable hydrogen flow to the burner, realizing pressure reduction, flow control and noise reduction functions.

[0009] The technical scheme of the present application is: a light and compact double-spring high-pressure pressure reducer, comprising a valve body, a secondary valve body, a valve core assembly, a valve seat, a diaphragm assembly, a primary spring assembly, a secondary spring assembly, a top rod and an adjusting hole plate; the valve seat, the valve core assembly and the secondary spring assembly are sequentially installed in the inner cavity of the valve body from top to bottom, the secondary valve body is sleeved on the outer side of the upper end of the valve body, the primary spring assembly is installed in the inner cavity of the upper end of the secondary valve body, the diaphragm assembly is arranged in the inner cavity of the secondary valve body and located between the primary spring assembly and the upper end of the valve body, and the top rod penetrates through the valve body and is connected with the diaphragm assembly and the valve core assembly at both ends; the valve body is provided with a valve inlet flow channel and a low-pressure cavity gas flow channel, the valve inlet flow channel is communicated with a high-pressure cavity arranged on the valve seat, and the low-pressure cavity gas flow channel is communicated with a valve outlet arranged on the secondary valve body.

[0010] Preferably, the valve inlet flow channel and the low-pressure cavity gas flow channel are arranged on both sides of the inner cavity of the valve body.

[0011] Preferably, the valve body is a stepped cylindrical structure, the diameter of the upper end cylindrical body is smaller than that of the lower end cylindrical body; a stepped circular hole is arranged in the large end cylindrical structure, the upper end small hole in the stepped circular hole is used for installing the valve seat, and the large hole is used as an inner cavity for installing the valve seat, the valve core assembly and the secondary spring assembly; the valve inlet flow channel is arranged on one side of the inner cavity; a transverse flow channel is arranged at the stepped cylindrical interface of the valve body on the other side of the valve inlet flow channel, the transverse flow channel is communicated with a through hole arranged on the top surface of the inner cavity, and the transverse flow channel and the gap between the small end cylindrical body of the valve body and the secondary valve body together constitute the gas flow channel of the low-pressure cavity; a groove for deforming displacement of the diaphragm assembly is arranged on the upper end of the small end cylindrical body, and a through hole for installing the adjusting hole plate is arranged between the groove and the transverse flow channel.

[0012] Preferably, the directions of the valve inlet and the valve outlet are parallel to the movement directions of the primary spring assembly and the secondary spring assembly.

[0013] Preferably, a first-stage pressure reduction structure is arranged on the valve seat, the upper end of the first-stage pressure reduction structure is a high-pressure cavity, a second-stage pressure reduction structure is arranged on the secondary valve body, and the valve outlet is arranged behind the second-stage pressure reduction structure; the gas flow channel between the first-stage pressure reduction structure and the second-stage pressure reduction structure is a low-pressure cavity gas flow channel.

[0014] Preferably, the first-stage pressure reduction structure is a throat hole arranged at the lower end of the valve seat.

[0015] Preferably, the second-stage pressure reduction structure is provided with a noise reduction flow channel, the ratio of the equivalent diameter of the noise reduction flow channel to the diameter of the second-stage pressure reduction structure is d3 / d2, and d3 / d2 is 1.1-2.5, preferably 1.3-1.8; the ratio of the outlet diameter of the flow channel to the diameter of the second-stage pressure reduction structure is d4 / d2, and d4 / d2 is 1.5-3, preferably 2-2.8.

[0016] Preferably, the throat diameter of the first stage pressure reducing structure is larger than the throat diameter of the second stage pressure reducing structure, and the hydrogen flow is controlled by the throat diameter of the second stage pressure reducing structure.

[0017] Preferably, the pressure of the high pressure chamber and the low pressure chamber is distributed by the diameter ratio of the first stage pressure reducing structure and the second stage structure; the throat diameter d1 of the first stage pressure reducing structure and the throat diameter d2 of the second stage pressure reducing structure: d1 / d2 is in the range of 1.2-2, preferably 1.4-1.8.

[0018] Preferably, the valve core assembly is composed of a valve core and a sealing filler embedded in the upper end of the valve core, wherein the sealing filler is made of non-metallic material, is installed in the groove on the upper end of the valve core, and is used to protect the first stage pressure reducing structure from mechanical damage.

[0019] Preferably, the diaphragm assembly is composed of a diaphragm, a diaphragm support, a diaphragm pressure pad and a diaphragm limiting pad, the diaphragm limiting pad is used to limit the movement of the diaphragm, and when the diaphragm support is subjected to the vertical force of the main spring assembly, the diaphragm support drives the diaphragm to deform, and the diaphragm support and the diaphragm pressure pad move vertically.

[0020] Preferably, in the diaphragm assembly, the downward main spring force provided by the main spring assembly, the upward pressure of the diaphragm subjected to the low pressure chamber and the upward auxiliary spring force provided by the auxiliary spring assembly form a balance relationship; wherein the main spring force and the pressure of the diaphragm subjected to the low pressure chamber are the main adjustment forces, the main spring force is much larger than the auxiliary spring force, and the ratio of the two is between 20 and 40.

[0021] Preferably, the ratio of the diameter d5 of the cavity between the diaphragm assembly and the valve body and the diameter d6 of the valve core is between 0.8 and 2.2, preferably 0.95-1.7.

[0022] Preferably, the top rod is arranged in pairs, with the upper end connected to the diaphragm support and the lower end connected to the valve core; as the diaphragm deforms, the top rod moves up and down, limiting the position of the valve core assembly 3 and controlling the flow cross section of the pressure reducing valve.

[0023] Preferably, the auxiliary spring assembly is composed of an auxiliary spring, an auxiliary spring cap and an auxiliary spring seat, wherein the auxiliary spring and the auxiliary spring seat are installed in the auxiliary spring cap, the deformation of the auxiliary spring is constrained by the auxiliary spring cap and the auxiliary spring seat, and the auxiliary spring seat is in contact with the valve core; the spring force and the downward thrust of the top rod form a balance, keeping the downstream pressure stable within a certain range.

[0024] Preferably, sealing rings are arranged between the auxiliary valve body and the valve body, the valve seat and the valve body, the valve core assembly and the valve body, and the auxiliary spring assembly and the valve body to achieve sealing.

[0025] The beneficial effects of the present application compared with the prior art are:

[0026] 1. The diaphragm high-pressure reducing structure in this invention is compact, with precise and small parts, realizing the lightweight and miniaturized design of the valve.

[0027] 2. The double-spring high-pressure pressure reducer of this invention is applicable to an inlet pressure of up to 70MPa and an outlet pressure of approximately 1kPa.

[0028] 3. The valve body and valve cover in this invention are pressure comparator elements of the pressure reducer, and reasonably allocate the proportional relationship between the high pressure chamber pressure, the low pressure chamber pressure and the outlet pressure to meet the application requirements of high pressure differential and low flow rate hydrogen, and effectively reduce the processing difficulty.

[0029] 4. In this invention, the inlet and outlet directions of the pressure reducer are parallel to the direction of spring movement, saving installation space.

[0030] 5. The pressure regulator in this invention can effectively adjust the outlet pressure when the inlet pressure changes, and the pressure adjustment range is large. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the dual-spring high-pressure reducer structure of the present invention;

[0032] In the diagram: 1 is the valve body, 2 is the secondary valve body, 3 is the valve core assembly, 4 is the valve seat, 5 is the diaphragm assembly, 6 is the main spring assembly, 7 is the secondary spring assembly, 8 is the push rod, and 9 is the adjusting orifice plate. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments.

[0034] like Figure 1 As shown, the dual-spring high-pressure pressure reducer of the present invention includes a valve body 1, a secondary valve body 2, a valve core assembly 3, a valve seat 4, a diaphragm assembly 5, a main spring assembly 6, a secondary spring assembly 7, a push rod 8, and an adjusting orifice plate 9. The valve seat 4, valve core assembly 3, and secondary spring assembly 2 are sequentially installed inside the valve body 1 from top to bottom. The adjusting orifice plate 9 is installed on one side of the upper end of the valve body 1. The diaphragm assembly 5 is installed above the valve body 1, and the main spring assembly 6 is installed above the diaphragm assembly 5. The push rod 8 passes through the valve body 1, connecting the diaphragm assembly 5 and the valve core assembly 3. The secondary valve body 2 is installed outside the valve body 1, diaphragm assembly 3, and main spring assembly 6. The hydrogen flow path passes through the valve body 1, valve core assembly 3, and secondary valve body 2. The pressure reducing valve is equipped with multiple sealing rings to ensure a tight seal.

[0035] The valve core assembly 3 consists of a valve core 3-1 and a sealing packing 3-2 embedded in the upper end of the valve core. The sealing packing 3-2 is made of non-metallic material and is installed in the groove at the upper end of the valve core 3-1 to protect the first-stage pressure reducing structure of the valve body and avoid mechanical damage.

[0036] The upper end of the valve seat 4 is connected with the valve body 1 through thread, and the lower end is provided with a throat hole 4-1, which is a first-stage pressure reducing structure. The high-pressure cavity is above the first-stage pressure reducing structure, and the pressure of the high-pressure cavity is consistent with the inlet pressure of the valve.

[0037] The valve body is provided with an inner cavity, which is connected with the auxiliary valve body and the auxiliary spring cap through thread. The hydrogen inlet flow channel is arranged on the left side of the inner cavity, and the hydrogen outlet flow channel is arranged on the right side of the inner cavity.

[0038] The upper end of the auxiliary valve body 2 is provided with a hydrogen flow channel outlet, which is designed as a second-stage pressure reducing structure 2-1. The low-pressure cavity is between the first-stage pressure reducing structure and the second-stage pressure reducing structure. The pressure of the low-pressure cavity is directly related to the spring force, the sensing area of the diaphragm assembly and the second-stage pressure reducing structure. The pressure after the second-stage pressure reducing structure is the outlet pressure. The second-stage pressure reducing structure is provided with a noise reduction flow channel 2-2, which is tapered. A plurality of noise reduction flow channels are arranged above and below the throat hole of the second-stage pressure reducing structure, which can be formed through screwing or welding. The equivalent diameter of the noise reduction flow channel is larger than the size of the throat hole of the second-stage pressure reducing structure, so that the noise generated by the high-speed flow of gas is effectively reduced.

[0039] The main spring assembly 6 is composed of a main spring 6-1, a main spring cap 6-2 and a main spring seat 6-3. The deformation of the main spring 6-1 is constrained by the main spring cap 6-2 and the main spring seat 6-3. The main spring seat 6-3 is in contact with the diaphragm assembly 5. The height of the main spring 6-1 is actively adjusted, the main spring seat 6-3 is pushed up and down, and the diaphragm assembly 5 is driven to move up and down. The main spring cap 6-2 is provided with an opening at the top, so that the spring installation space is communicated with the atmosphere, avoiding the change of the space pressure caused by the movement of the spring, affecting the pressure reducing performance, and effectively reducing the total weight of the valve.

[0040] The diaphragm assembly 5 is composed of a diaphragm 5-1, a diaphragm support 5-2, a diaphragm pressure pad 5-3 and a diaphragm limiting pad 5-4. The diaphragm limiting pad 5-4 limits the movement of the diaphragm 5-1. When the diaphragm support 5-2 is subjected to the vertical force of the main spring 6-1, the diaphragm 5-1 is deformed, and the diaphragm support 5-2 and the diaphragm pressure pad 5-3 move vertically.

[0041] The upper end of the top rod 8 is connected with the diaphragm assembly 5, and the lower end is connected with the valve core assembly 3, which is arranged in pairs. With the deformation of the diaphragm 5-1, the top rod 8 moves up and down, limits the position of the valve core assembly 3, and controls the flow cross section of the pressure reducing valve.

[0042] The auxiliary spring assembly 7 is composed of an auxiliary spring 7-1, an auxiliary spring cap 7-2 and an auxiliary spring seat 7-3. The auxiliary spring 7-1 and the auxiliary spring seat 7-2 are installed in the auxiliary spring cap 7-3. The deformation of the auxiliary spring 7-1 is constrained by the auxiliary spring cap 7-2 and the auxiliary spring seat 7-3. The auxiliary spring seat 7-3 is in contact with the valve core 3-1. The spring force and the downward thrust of the top rod 8 are balanced, so that the downstream pressure is kept stable within a certain range.

[0043] The adjusting orifice plate 9 is connected with the diaphragm lower cavity and the hydrogen flow channel, and can feedback to the main spring 6-1 when the pressure of the low-pressure cavity changes, so as to adjust the position of the valve core assembly 3 and keep the pressure of the low-pressure cavity stable.

[0044] In the double-spring high-pressure pressure reducer, the diameter ratio d1 / d2 of the first-stage and second-stage pressure reducing structures is 1.2-2, preferably 1.4-1.8, the high-pressure cavity, the low-pressure cavity and the outlet pressure are reasonably distributed, and the required outlet pressure and hydrogen flow of the pressure reducer are output.

[0045] In the double-spring high-pressure pressure reducer, the second-stage pressure reducing structure is provided with a noise reduction flow channel 2-2, which effectively reduces the noise generated when the hydrogen flows at high speed. The equivalent diameter of the noise reduction flow channel and the diameter of the second-stage pressure reducing structure have a ratio d3 / d2 of 1.1-2.5, preferably 1.3-1.8.

[0046] In the double-spring high-pressure pressure reducer, sealing rings are arranged between the auxiliary valve body 2 and the valve body 1, the valve seat 4 and the valve body 1, the valve core assembly 3 and the valve body 1, and the auxiliary spring assembly 7 and the valve body 1, so as to realize sealing.

[0047] The inlet and outlet directions of the double-spring high-pressure pressure reducer are parallel to the spring movement direction, which saves installation space and realizes lightweight and miniaturized design of the valve, and meets the needs of hydrogen energy devices in limited space.

[0048] The working principle of the present application is as follows:

[0049] When high-pressure hydrogen enters the high-pressure cavity of the valve, the diaphragm is deformed by manually adjusting the main spring assembly, the top rod moves downward, the valve core moves downward, the valve core assembly and the first-stage pressure reducing structure are in a disengaged state, and the hydrogen is sequentially output after passing through the first-stage and second-stage pressure reducing structures. Since the size of the first-stage pressure reducing structure is larger than that of the second-stage, the pressure of the low-pressure cavity gradually increases with the entry of high-pressure gas, the diaphragm assembly is subjected to the upward medium force of the low-pressure cavity, when the pressure in the low-pressure cavity is high, the valve core assembly starts to move upward against the downward spring force, and when the pressure in the low-pressure cavity is low, the valve core assembly moves downward, until the resultant force tends to be balanced.

[0050] The above presents and describes the basic principles, main features and advantages of the present application. The present application is not limited to the above-mentioned embodiments, which are only examples of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0051] The parts of the present application not described in detail are common knowledge to those skilled in the art.

Claims

1. A lightweight compact dual spring high pressure pressure reducer, characterized by: The valve comprises a valve body, a secondary valve body, a valve core assembly, a valve seat, a diaphragm assembly, a primary spring assembly, a secondary spring assembly, a top rod and an adjusting hole plate; the valve seat, the valve core assembly and the secondary spring assembly are sequentially installed in the inner cavity of the valve body from top to bottom, the secondary valve body is sleeved on the outer side of the upper end of the valve body, the primary spring assembly is installed in the inner cavity of the upper end of the secondary valve body, the diaphragm assembly is arranged in the inner cavity of the upper end of the secondary valve body and located between the primary spring assembly and the upper end of the valve body, the top rod penetrates through the valve body and is connected with the diaphragm assembly and the valve core assembly at both ends respectively; the valve body is provided with a valve inlet flow channel and a low-pressure cavity gas flow channel, the valve inlet flow channel is communicated with a high-pressure cavity arranged on the valve seat, and the low-pressure cavity gas flow channel is communicated with a valve outlet arranged on the secondary valve body; the adjusting hole plate is installed on the upper end of the valve body and communicated with the low-pressure cavity gas flow channel and the cavity between the diaphragm assembly and the valve body at both ends respectively.

2. A light weight compact double spring high pressure pressure reducer as claimed in claim 1, wherein: The valve inlet flow channel and the low-pressure cavity gas flow channel are arranged on both sides of the inner cavity of the valve body.

3. A light-weight compact double spring high-pressure pressure reducer according to claim 1 or 2, characterized in that: The valve body is a stepped cylindrical structure, the diameter of the upper end cylindrical body is smaller than that of the lower end cylindrical body; a stepped circular hole is arranged in the large end cylindrical body structure, the upper end small hole in the stepped circular hole is used for installing the valve seat, and the large hole is used as an inner cavity for installing the valve seat, the valve core assembly and the secondary spring assembly; the valve inlet flow channel is arranged on one side of the inner cavity; a transverse flow channel is arranged at the stepped cylindrical interface of the valve body on the other side of the valve inlet flow channel, the flow channel is communicated with a through hole arranged on the top surface of the inner cavity, and the transverse flow channel and the gap between the small end cylindrical body of the valve body and the secondary valve body together constitute the gas flow channel of the low-pressure cavity; a groove for deforming and displacing the diaphragm assembly is arranged on the upper end of the small end cylindrical body, and a through hole for installing the adjusting hole plate is arranged between the groove and the transverse flow channel.

4. A light weight compact double spring high pressure reducing valve as claimed in claim 1 wherein: The directions of the valve inlet and the valve outlet are parallel to the movement directions of the primary spring assembly and the secondary spring assembly.

5. A light weight compact double spring high pressure reducing valve as claimed in claim 1 wherein: A first-stage pressure reduction structure is arranged on the valve seat, the upper end of the first-stage pressure reduction structure is a high-pressure cavity; a second-stage pressure reduction structure is arranged on the secondary valve body, and the valve outlet is arranged behind the second-stage pressure reduction structure; the gas flow channel between the first-stage pressure reduction structure and the second-stage pressure reduction structure is a low-pressure cavity gas flow channel.

6. A light weight compact double spring high pressure reducing valve as claimed in claim 5 wherein: The first-stage pressure reduction structure is a throat hole arranged at the lower end of the valve seat.

7. A light weight compact double spring high pressure reducing valve as claimed in claim 5 wherein: The second-stage pressure reduction structure is provided with a noise reduction flow channel, the ratio of the equivalent diameter of the noise reduction flow channel to the diameter of the second-stage pressure reduction structure is d3 / d2, and d3 / d2 is 1.1-2.5; the ratio of the outlet diameter of the flow channel to the diameter of the second-stage pressure reduction structure is d4 / d2, and d4 / d2 is 1.5-3.

8. A light weight compact double spring high pressure reducing valve as claimed in claim 7 wherein: The ratio d3 / d2 is 1.3-1.8, and the ratio d4 / d2 is 2-2.

8.

9. A light weight compact double spring high pressure reducing valve as claimed in claim 5 wherein: The throat hole diameter of the first-stage pressure reduction structure is larger than the throat hole diameter of the second-stage pressure reduction structure, and the hydrogen flow is controlled through the throat hole of the second-stage pressure reduction structure.

10. A light weight compact double spring high pressure reducing valve as claimed in claim 9 wherein: The diameters of the first-stage pressure reduction structure and the second-stage pressure reduction structure are used to distribute the pressures of the high-pressure cavity and the low-pressure cavity; the ratio of the throat hole diameter d1 of the first-stage pressure reduction structure to the throat hole diameter d2 of the second-stage pressure reduction structure is d1 / d2, and d1 / d2 is 1.2-2.

11. A light weight compact double spring high pressure reducing valve as claimed in claim 10 wherein: d1 / d2 is 1.4-1.

8.

12. A light weight compact double spring high pressure reducing valve as claimed in claim 5 wherein: The valve core assembly is composed of a valve core and a sealing packing embedded on the upper end of the valve core, the material of the sealing packing is non-metallic material, the sealing packing is installed in the groove on the upper end of the valve core and used for protecting the first-stage pressure reduction structure and avoiding mechanical damage.

13. A light-weight compact double spring high pressure hydraulic reducing valve as claimed in claim 1 or 12 wherein: The diaphragm assembly is composed of a diaphragm, a diaphragm support, a diaphragm pressing pad and a diaphragm limiting pad. The diaphragm limiting pad is used to limit the movement of the diaphragm. When the diaphragm support is subjected to the force in the vertical direction of the main spring assembly, the diaphragm is deformed, and the diaphragm support and the diaphragm pressing pad move vertically.

14. A light weight compact double spring high pressure reducing valve as claimed in claim 13 wherein: In the diaphragm assembly, the downward main spring force provided by the main spring assembly, the upward pressure of the diaphragm subjected to the low-pressure cavity and the upward auxiliary spring force provided by the auxiliary spring assembly form a balanced relationship. The main spring force and the pressure of the diaphragm subjected to the low-pressure cavity are the main regulating forces, the main spring force is much greater than the auxiliary spring force, and the ratio between them is between 20 and 40.

15. A light weight compact double spring high pressure reducing valve as claimed in claim 13 wherein: The ratio between the diameter d5 of the cavity between the diaphragm assembly and the valve body and the diameter d6 of the valve core is between 0.8 and 2.

2.

16. A light weight compact double spring high pressure reducing valve as claimed in claim 15 wherein: The ratio between the diameter d5 of the cavity between the diaphragm assembly and the valve body and the diameter d6 of the valve core is between 0.95 and 1.

7.

17. A light weight compact double spring high pressure reducing valve as claimed in claim 13 wherein: The upper end of the ejector rod is connected with the diaphragm support, and the lower end is connected with the valve core, and the ejector rod is arranged in pairs. With the deformation of the diaphragm, the ejector rod moves up and down to limit the position of the valve core assembly and control the flow cross section of the pressure reducing valve.

18. A light weight compact double spring high pressure hydraulic pressure reducer as claimed in claim 17, wherein: The auxiliary spring assembly is composed of an auxiliary spring, an auxiliary spring cap and an auxiliary spring seat. The auxiliary spring and the auxiliary spring seat are installed in the auxiliary spring cap, the deformation of the auxiliary spring is constrained by the auxiliary spring cap and the auxiliary spring seat, and the auxiliary spring seat is in contact with the valve core. The spring force and the downward thrust of the ejector rod form a balance to keep the downstream pressure stable within a certain range.

19. A light weight compact double spring high pressure reducing valve as claimed in claim 1 wherein: Sealing rings are arranged between the auxiliary valve body and the valve body, the valve seat and the valve body, the valve core assembly and the valve body, and the auxiliary spring assembly and the valve body to achieve sealing.

Images