Liquid pressure regulating valve with pressure stabilizing device

Abstract

The invention discloses a liquid pressure regulating valve with a pressure stabilizing device, and belongs to the technical field of valves. A liquid pressure regulating valve with a pressure stabilizing device comprises a valve body, an oil inlet pipe and a regulating cavity which are communicated are formed in the valve body, the oil inlet pipe is communicated with a first oil outlet pipe, the regulating cavity is communicated with a second oil outlet pipe, and a steel ball used for blocking a port of the oil inlet pipe is arranged in the regulating cavity. A pressure adjusting spring capable of adjusting elasticity in a multi-stage mode and an adjusting bolt used for pushing the pressure adjusting spring are arranged on the side, away from the oil inlet pipe, of the steel ball. The pressure regulating valve has the advantages of being simpler in structure and larger in pressure regulating range.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a liquid pressure regulating valve with a voltage stabilizing device. Background Art

[0002] The function of a liquid pressure regulating valve in an engine is mainly to ensure that the pressure difference between the fuel pressure at the inlet and outlet of the fuel injector in the fuel system and the pressure in the intake pipe remains constant. In this way, the amount of fuel injected by the fuel injector only depends on the opening time of the fuel injector. The engine control unit (ECU) can accurately control the fuel injection amount by precisely controlling the width of the opening electric pulse of the fuel injector, enabling the engine to obtain appropriate fuel supply under different working conditions to achieve good power output, fuel economy, and emission performance. The existing liquid pressure regulating valves have complex structures and relatively small pressure adjustment ranges. For different types of equipment with significantly different pressure adjustment ranges, the same type of pressure regulating valve is mainly adapted to a single model of equipment, and the applicable range is small. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of the complex structure and relatively small pressure adjustment range of the existing liquid pressure regulating valves, and to propose a liquid pressure regulating valve with a voltage stabilizing device.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A liquid pressure regulating valve with a voltage stabilizing device includes a valve body. An oil inlet pipe and an adjustment chamber are provided in the valve body and are in communication. The oil inlet pipe is in communication with a first oil outlet pipe, and the adjustment chamber is in communication with a second oil outlet pipe. A steel ball for blocking the port of the oil inlet pipe is provided inside the adjustment chamber. A pressure regulating spring capable of multi-stage adjustment of elastic force and an adjustment bolt for pushing the pressure regulating spring are provided on the side of the steel ball away from the oil inlet pipe.

[0005] Further, the pressure regulating spring includes a first spring and a second spring located inside the first spring. The first spring and the second spring are arranged in a staggered manner. One end of the first spring close to the adjustment bolt abuts against the adjustment bolt, and one end of the second spring close to the steel ball abuts against the steel ball. The first spring and the second spring are connected by a connecting rod.

[0006] Further, the connecting rod has a straight rod structure. One end of the connecting rod is connected to one end of the first spring close to the steel ball, and the other end of the connecting rod is connected to one end of the second spring close to the adjustment bolt. The connecting rod is located between the first spring and the second spring.

[0007] Further, a first straight cylinder is provided between the first spring and the second spring. The first straight cylinder has a straight cylinder structure with openings at both ends. There are gaps between the side wall of the first straight cylinder and both the first spring and the second spring.

[0008] Further, a connecting rod opening corresponding to the connecting rod is formed on the side wall of the first straight cylinder, and the connecting rod is located inside the connecting rod opening.

[0009] Further, a second straight cylinder is arranged inside the second spring, and a gap is arranged between the side wall of the second straight cylinder and the second spring.

[0010] Further, a first annular groove corresponding to the first straight cylinder and a second annular groove corresponding to the second straight cylinder are formed on the end face of the adjusting bolt close to the pressure regulating spring.

[0011] Further, both the first annular groove and the second annular groove are annular groove structures with openings facing the pressure regulating spring. The inner wall size of the first annular groove corresponds to the outer wall size of the first straight cylinder, and the inner wall size of the second annular groove corresponds to the outer wall size of the second straight cylinder.

[0012] Further, a pressure stabilizing cavity is arranged on one side of the valve body at a position opposite to the first oil outlet pipe. The pressure stabilizing cavity is communicated with the oil inlet pipe. A plug is arranged inside the pressure stabilizing cavity, and a pressure stabilizing piston is slidably and sealingly arranged between the plug and the oil inlet pipe, so as to form an airtight chamber between the pressure stabilizing piston and the plug.

[0013] Further, the plug is screwed to the side wall of the pressure stabilizing cavity, and turning the plug is used to adjust the distance between the plug and the pressure stabilizing piston.

[0014] Compared with the prior art, the present invention provides a liquid pressure regulating valve with a pressure stabilizing device, and has the following beneficial effects: When the liquid pressure regulating valve with a pressure stabilizing device of the present invention is in use, after fuel enters the oil inlet pipe, it is discharged from the first oil outlet pipe. A part of the oil contacts the steel ball and presses on the steel ball. The adjusting bolt pushes the pressure regulating spring, and the pressure regulating spring presses on the steel ball to apply a specified pressure to the steel ball. This pressure value corresponds to the pressure of the oil to be controlled in the oil inlet pipe. When the oil pressure exceeds this pressure value, the fuel pushes the steel ball, the steel ball compresses the pressure regulating spring, and the fuel enters the adjusting cavity and then is discharged from the second oil outlet pipe, so as to achieve the purpose of regulating the fuel pressure discharged from the first oil outlet pipe. Compared with the liquid pressure regulating valve in the prior art, the structure is simpler.

[0015] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention from the upper left perspective; Figure 2 Schematic diagram of the lower right view of the overall structure of the present invention; Figure 3 Schematic diagram of the sectional view of the overall structure of the present invention in the front view direction; Figure 4 Schematic diagram of the upper right view of the pressure regulating spring and adjusting bolt structure of the present invention; Figure 5 Schematic diagram of the upper right view of the pressure regulating spring structure of the present invention; Figure 6 Schematic diagram of the right view of the pressure regulating spring structure of the present invention; Figure 7 Schematic diagram of the upper right view of the first straight tube structure of the present invention; Figure 8 Schematic diagram of the sectional view of the first straight tube structure of the present invention in the front view direction; Figure 9 Schematic diagram of the left view of the first straight tube structure of the present invention; Figure 10 Schematic diagram of the first annular groove and second annular groove structure of the present invention.

[0017] In the figure: 1. Valve body; 101. Inlet oil pipe; 102. First outlet oil pipe; 103. Second outlet oil pipe; 104. Pressure stabilizing chamber; 105. Airtight chamber; 106. Adjusting chamber; 2. Steel ball; 3. Pressure regulating spring; 301. First spring; 302. Second spring; 303. Connecting rod; 304. First straight tube; 305. Second straight tube; 306. Connecting rod opening; 4. Adjusting bolt; 401. First annular groove; 402. Second annular groove; 5. Pressure stabilizing piston; 6. Plug. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Refer to Figure 1-10 , a liquid pressure regulating valve with a pressure stabilizing device of the present invention includes a valve body 1. The main body of the valve body 1 is in a straight tube shape. An interconnected inlet oil pipe 101 and an adjusting chamber 106 are provided inside the valve body 1. In this application, taking the inlet oil pipe 101 and the adjusting chamber 106 being coaxial with the valve body 1 as an example, both the inlet oil pipe 101 and the adjusting chamber 106 are through groove structures with openings at both ends.

[0020] As Figure 3 shown, the left end of the inlet oil pipe 101 is the oil inlet, the right end of the inlet oil pipe 101 is connected to the left end of the adjusting chamber 106, and the inner diameter of the adjusting chamber 106 is larger than the inner diameter of the inlet oil pipe 101.

[0021] The inlet pipe 101 is connected to the first outlet pipe 102. The first outlet pipe 102 is located at the bottom of the inlet pipe 101. The first outlet pipe 102 is used for normal oil discharge. The regulating chamber 106 is connected to the second outlet pipe 103. The second outlet pipe 103 is located at the bottom of the regulating chamber 106. The second outlet pipe 103 is used for pressure relief oil discharge when the oil pressure in the first outlet pipe 102 is too high.

[0022] A steel ball 2 for blocking the port of the inlet pipe 101 is installed inside the regulating chamber 106. The steel ball 2 is located at the connection between the inlet pipe 101 and the regulating chamber 106. The outer diameter of the steel ball 2 is larger than the inner diameter of the inlet pipe 101.

[0023] A pressure regulating spring 3 with multi-stage adjustable elasticity is installed on the side of the steel ball 2 away from the inlet pipe 101. The multi-stage adjustable elasticity is used to increase the pressure adjustment range of the pressure regulating spring 3. Compared with ordinary springs, the applicable range of this regulating valve is increased.

[0024] And an adjusting bolt 4 for pushing the pressure regulating spring 3. The adjusting bolt 4 is screwed to the regulating chamber 106. Turning the adjusting bolt 4 closer to or farther from the pressure regulating spring 3 is used to squeeze or relax the pressure regulating spring 3, thereby adjusting the pressure applied by the pressure regulating spring 3 to the steel ball 2.

[0025] The pressure regulating spring 3 includes a first spring 301 and a second spring 302 located inside the first spring 301. The first spring 301 and the second spring 302 are arranged in a staggered manner. Here, the staggered arrangement means that, as Figure 8 shown, the right end of the first spring 301 extends beyond the right end of the second spring 302, while the left end of the second spring 302 extends beyond the left end of the first spring 301.

[0026] One end of the first spring 301 close to the adjusting bolt 4 abuts against the adjusting bolt 4. One end of the second spring 302 close to the steel ball 2 abuts against the steel ball 2. The first spring 301 and the second spring 302 are connected by a connecting rod 303, that is, the right end of the first spring 301 abuts against the adjusting bolt 4, and the left end of the second spring 302 abuts against the steel ball 2.

[0027] Here, the radial dimension of the second spring 302 is smaller than that of the first spring 301. The wire diameter of the wire winding to form the first spring 301 is larger than the wire diameter of the wire winding to form the second spring 302, and the overall structural strength of the first spring 301 is greater than the overall structural strength of the second spring 302, that is, the maximum elastic force of the first spring 301 is greater than the maximum elastic force of the second spring 302. The axial length of the second spring 302 when compressed to the elastic limit is not greater than the axial length of the first spring 301 when compressed to the elastic limit.

[0028] The main body of the connecting rod 303 is a straight rod structure, and the two ends of the connecting rod 303 are bent structures. One end of the connecting rod 303 is connected to one end of the first spring 301 close to the steel ball 2, and the other end of the connecting rod 303 is connected to one end of the second spring 302 close to the adjusting bolt 4. The connecting rod 303 is located between the first spring 301 and the second spring 302. The connecting rod 303 is a rigid rod-like structure, mainly providing a tensile or pushing force between the first spring 301 and the second spring 302 without obvious elastic deformation. Its function is to support the second spring 302 so that the second spring 302 can still undergo elastic deformation to squeeze the steel ball 2 even when there is no support at the right end.

[0029] During use, first, the adjusting bolt 4 squeezes the first spring 301. The first spring 301 pulls the second spring 302 to the left through the connecting rod 303, and the second spring 302 then squeezes the steel ball 2 to the left, providing the minimum specified pressure for the steel ball 2.

[0030] When it is necessary to increase the specified pressure, turn the adjusting bolt 4 to further squeeze the steel ball 2 until the left end of the first spring 301 contacts the steel ball 2. This stage is the first-stage elastic force adjustment. In this process, the first spring 301 will also undergo a small amount of elastic deformation to provide a part of the elastic force, but overall, it is the second spring 302 that provides the elastic force.

[0031] Continue to turn the adjusting bolt 4. When the left end of the first spring 301 contacts the steel ball 2, it enters the second-stage elastic force adjustment stage. At this time, there is still a distance between the right end of the second spring 302 and the adjusting bolt 4. Turning the adjusting bolt 4 again, the first spring 301 begins to undergo elastic compression deformation. At this time, the second spring 302 moves to the right synchronously with the connecting rod 303 under the driving action of the connecting rod 303, and the second spring 302 no longer undergoes obvious elastic deformation. At this time, the first spring 301 and the second spring 302 simultaneously provide elastic force to squeeze the steel ball 2 to achieve a greater specified pressure until the first spring 301 reaches the maximum elastic compression limit, thereby providing the maximum elastic force to the surface of the steel ball 2.

[0032] A first straight cylinder 304 is installed between the first spring 301 and the second spring 302. Both the first straight cylinder 304 and the second straight cylinder 305 are straight cylinder structures with openings at both ends. There are gaps between the side wall of the first straight cylinder 304 and the first spring 301 and the second spring 302 respectively. The gaps are for the dimensional changes required during the normal elastic deformation of the first spring 301 and the second spring 302. The function of the first straight cylinder 304 is to provide a guiding effect for the second spring 302, preventing the end of the second spring 302 far from the steel ball 2 from undergoing asymmetric and uneven bending deformation due to the rightward pulling force from the connecting rod 303. Under the guiding effect of the first straight cylinder 304, when the right end of the second spring 302 deforms outward, the first straight cylinder 304 restrains the second spring 302 from the outside, so that the second spring 302 can normally elastically deform to the right, thereby providing normal elastic force support.

[0033] A connecting rod opening 306 corresponding to the connecting rod 303 is provided on the side wall of the first straight cylinder 304. The connecting rod 303 is located inside the connecting rod opening 306. The function of the connecting rod opening 306 is not only to enable the connecting rod 303 to normally connect the first spring 301 and the second spring 302 and have a certain movement space when the first spring 301 and the second spring 302 undergo elastic deformation, but also to provide a guiding effect for the connecting rod 303. Specifically, the connecting rod opening 306 is a through groove structure with openings at both ends along the radial side wall of the first straight cylinder 304 on the side wall of the first straight cylinder 304. The opening width of the connecting rod opening 306 corresponds to the outer diameter of the connecting rod 303. When the connecting rod 303 transmits a thrust or a pulling force, the connecting rod opening 306 can effectively prevent the connecting rod 303 from being laterally skewed. Here, the lateral direction refers to the two side directions where the side wall of the connecting rod opening 306 is located in the circumferential direction of the first straight cylinder 304.

[0034] A second straight cylinder 305 is installed inside the second spring 302. There is a gap between the side wall of the second straight cylinder 305 and the second spring 302. Here, the function of the second straight cylinder 305 is similar to that of the first straight cylinder 304, which is used to provide support from the inside to the outside for the elastic deformation of the second spring 302, preventing the second spring 302 from undergoing radial skew deformation inward. At the same time, if a third spring is installed later, it also provides support for the third spring.

[0035] It should be noted that a connecting rod opening can also be provided on the second straight cylinder 305, and a third spring, a third straight cylinder, a fourth spring, a fourth straight cylinder, etc. can continue to be provided inside the second spring 302, which is used to further increase the elastic force adjustment range of the pressure regulating spring 3. In this embodiment, a two-stage elastic force adjustment is taken as an example.

[0036] Compared with the ordinary spring structure, it can effectively increase the elastic force range and improve the utilization rate of the internal space of the spring at the same time.

[0037] On the end face of the adjusting bolt 4 close to the pressure regulating spring 3, a first annular groove 401 corresponding to the first straight cylinder 304 and a second annular groove 402 corresponding to the second straight cylinder 305 are provided. The first annular groove 401 provides support for the first straight cylinder 304, and the second annular groove 402 provides support for the second straight cylinder 305, so that the first straight cylinder 304 and the second straight cylinder 305 can maintain the same orientation as the first spring 301 and the second spring 302, thereby providing stable support for the first spring 301 and the second spring 302.

[0038] The axial lengths of the first straight cylinder 304 and the second straight cylinder 305 are both smaller than the axial lengths of the first spring 301 and the second spring 302 when they are compressed to the elastic deformation limit.

[0039] Specifically, both the first annular groove 401 and the second annular groove 402 are annular groove structures with openings facing the pressure regulating spring 3. The inner wall dimensions of the first annular groove 401 correspond to the outer wall dimensions of the first straight cylinder 304, and the inner wall dimensions of the second annular groove 402 correspond to the outer wall dimensions of the second straight cylinder 305. As Figure 10 shown, the right end of the first straight cylinder 304 is located in the first annular groove 401, and the right end of the second straight cylinder 305 is located in the second annular groove 402. The first annular groove 401 can clamp the first straight cylinder 304, and the second annular groove 402 can clamp the second straight cylinder 305, so that the orientations of the first straight cylinder 304 and the second straight cylinder 305 are the same as those of the first spring 301 and the second spring 302. At the same time, the first straight cylinder 304 is rotationally clamped in the first annular groove 401, and the second straight cylinder 305 is rotationally clamped in the second annular groove 402. In this way, when the adjusting bolt 4 is turned, the adjusting bolt 4 can drive the first straight cylinder 304 and the second straight cylinder 305 to approach or move away from the steel ball 2, and at the same time, relative rotation can occur between the adjusting bolt 4 and the first straight cylinder 304 and the second straight cylinder 305, without affecting the elastic deformation of the first spring 301 and the second spring 302, and without affecting the supporting effect of the first straight cylinder 304 and the second straight cylinder 305.

[0040] On one side of the valve body 1, a pressure stabilizing chamber 104 is installed at a position opposite to the first oil outlet pipe 102. The function of the pressure stabilizing chamber 104 is to provide a buffering effect. The pressure stabilizing chamber 104 is communicated with the oil inlet pipe 101. A plug 6 is installed inside the pressure stabilizing chamber 104. A pressure stabilizing piston 5 is slidably and sealedly arranged between the plug 6 and the oil inlet pipe 101, so that an airtight chamber 105 is formed between the pressure stabilizing piston 5 and the plug 6. When the oil pressure at the outlet of the first oil outlet pipe 102 is greater than the specified pressure, in addition to pushing the steel ball 2 to release pressure, the fuel will also push the pressure stabilizing piston 5, squeezing the air in the airtight chamber 105. The air pressure rises and forms a balance with the fuel pressure, so that the fuel pressure remains stable.

[0041] When the fuel consumption at the outlet of the first fuel outlet pipe 102 undergoes a sudden change, due to the incompressibility of the liquid, the fuel pressure in the fuel inlet pipe 101 will undergo a sudden change. At this time, the compressed air in the airtight chamber 105 will quickly make up for the pressure mutation in the fuel inlet pipe 101 to maintain the dynamic stability of the fuel pressure.

[0042] The plug 6 is screwed to the side wall of the pressure stabilizing chamber 104. Turning the plug 6 is used to adjust the distance between the plug 6 and the pressure stabilizing piston 5. When turning the plug 6 to adjust the distance between the plug 6 and the pressure stabilizing piston 5, the initial size of the internal space of the airtight chamber 105 can be changed. Since the air in the airtight chamber 105 itself remains unchanged, changing the initial size of the internal space of the airtight chamber 105 can adjust the sensitivity of the pressure stabilizing piston 5. When the sensitivity of the pressure stabilizing piston 5 is too high, the wear rate will increase. When the sensitivity is too low, it is not conducive to stabilizing the oil pressure in a timely manner. Therefore, for different oil pressure requirements, adjusting to an appropriate sensitivity is beneficial to reducing the wear of the pressure stabilizing piston 5 while stabilizing the oil pressure.

[0043] Working principle: During use, fuel enters the interior of the fuel inlet pipe 101 from the fuel inlet. When the pressure does not exceed the specified pressure, the fuel is normally ejected from the first fuel outlet pipe 102.

[0044] When the pressure exceeds the specified pressure, the fuel will push open the steel ball 2, enter the regulating chamber 106, and then be discharged from the second fuel outlet pipe 103 for pressure relief. At the same time, the fuel will also push the pressure stabilizing piston 5 to compress the air in the airtight chamber 105 for buffering.

[0045] When it is necessary to adjust the pressure that the steel ball 2 can withstand through the pressure regulating spring 3, first, the adjusting bolt 4 squeezes the first spring 301. The first spring 301 pulls the second spring 302 to the left through the connecting rod 303, and the second spring 302 then squeezes the steel ball 2 to the left to provide the minimum specified pressure for the steel ball 2.

[0046] When it is necessary to increase the specified pressure, turn the adjusting bolt 4 to further squeeze the steel ball 2 until the left end of the first spring 301 contacts the steel ball 2. This stage is the first-stage elastic force adjustment. In this process, the first spring 301 will also undergo a slight elastic deformation to provide a part of the elastic force, but overall, it is the second spring 302 that provides the elastic force.

[0047] Continue to turn the adjusting bolt 4. When the left end of the first spring 301 contacts the steel ball 2, it starts to enter the stage of secondary elastic force adjustment. At this time, there is still a distance between the right end of the second spring 302 and the adjusting bolt 4. Turning the adjusting bolt 4 again, the first spring 301 begins to undergo elastic compression deformation. At this time, under the driving action of the connecting rod 303, the second spring 302 moves synchronously to the right with the connecting rod 303, and the second spring 302 no longer undergoes obvious elastic deformation. At this time, the first spring 301 and the second spring 302 simultaneously provide elastic force to squeeze the steel ball 2 to achieve a greater specified pressure until the first spring 301 reaches the maximum elastic compression limit, thereby providing the maximum elastic force to the surface of the steel ball 2.

[0048] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0049] In the description of this specification, the description referring to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" 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 present invention. In this specification, the schematic representations of the above terms do 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. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A liquid pressure regulating valve with a pressure stabilizing device, comprising a valve body (1), characterized in that: The valve body (1) is provided with an oil inlet pipe (101) and an adjusting chamber (106) connected to each other. The oil inlet pipe (101) is connected to the first oil outlet pipe (102), and the adjusting chamber (106) is connected to the second oil outlet pipe (103). A steel ball (2) for blocking the port of the oil inlet pipe (101) is arranged inside the adjusting chamber (106). A pressure regulating spring (3) with multi-stage adjustable elastic force and an adjusting bolt (4) for pushing the pressure regulating spring (3) are arranged on a side of the steel ball (2) away from the oil inlet pipe (101).

2. A liquid pressure regulating valve with a pressure stabilizing device according to claim 1, characterized in that: The pressure regulating spring (3) comprises a first spring (301) and a second spring (302) located inside the first spring (301); the first spring (301) and the second spring (302) are arranged in a staggered manner; an end of the first spring (301) close to the adjusting bolt (4) abuts against the adjusting bolt (4); an end of the second spring (302) close to the steel ball (2) abuts against the steel ball (2); and the first spring (301) and the second spring (302) are connected via a connecting rod (303).

3. A liquid pressure regulating valve with a pressure stabilizing device according to claim 2, characterized in that: The connecting rod (303) is a straight rod structure. One end of the connecting rod (303) is connected to an end of the first spring (301) close to the steel ball (2), and the other end of the connecting rod (303) is connected to an end of the second spring (302) close to the adjusting bolt (4). The connecting rod (303) is located between the first spring (301) and the second spring (302).

4. A liquid pressure regulating valve with a pressure stabilizing device according to claim 3, characterized in that: A first straight cylinder (304) is arranged between the first spring (301) and the second spring (302); the first straight cylinder (304) is a straight cylinder structure with openings at both ends; and gaps are arranged between the side walls of the first straight cylinder (304) and the first spring (301) and the second spring (302).

5. A liquid pressure regulating valve with a pressure stabilizing device according to claim 4, characterized in that: A connecting rod opening (306) corresponding to the connecting rod (303) is provided on the side wall of the first straight cylinder (304), and the connecting rod (303) is located inside the connecting rod opening (306).

6. A liquid pressure regulating valve with a pressure stabilizing device according to claim 4, characterized in that: A second straight cylinder (305) is provided inside the second spring (302), and a gap is provided between the side wall of the second straight cylinder (305) and the second spring (302).

7. A liquid pressure regulating valve with a pressure stabilizing device according to claim 6, characterized in that: A first annular groove (401) corresponding to the first straight cylinder (304) and a second annular groove (402) corresponding to the second straight cylinder (305) are formed on the end surface of the adjusting bolt (4) close to the pressure regulating spring (3).

8. The liquid pressure regulating valve with a pressure stabilizing device according to claim 7, characterized in that: The first annular groove (401) and the second annular groove (402) are both annular groove structures with their openings facing the pressure regulating spring (3); the inner wall size of the first annular groove (401) corresponds to the outer wall size of the first straight cylinder (304); and the inner wall size of the second annular groove (402) corresponds to the outer wall size of the second straight cylinder (305).

9. The liquid pressure regulating valve with a pressure stabilizing device according to claim 1, characterized in that: A pressure-stabilizing chamber (104) is provided on one side of the valve body (1) and is located opposite to the first oil outlet pipe (102). The pressure-stabilizing chamber (104) is communicated with the oil inlet pipe (101). A blind head (6) is provided inside the pressure-stabilizing chamber (104). A pressure-stabilizing piston (5) is provided between the blind head (6) and the oil inlet pipe (101) in a sliding seal, so that an airtight chamber (105) is formed between the pressure-stabilizing piston (5) and the blind head (6).

10. The liquid pressure regulating valve with a pressure stabilizing device according to claim 9, characterized in that: The blind head (6) is threadedly connected to the side wall of the pressure stabilizing chamber (104), and the blind head (6) is screwed to adjust the distance between the blind head (6) and the pressure stabilizing piston (5).

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