Pressure regulating valve

Abstract

The application discloses a pressure regulating valve and belongs to the technical field of valves. The pressure regulating valve comprises a valve seat, a valve cover, a valve core, a valve rod connected with the valve core at a bottom end, a pressure regulating mechanism and a lubricating mechanism. The valve seat is provided with an inlet channel and an outlet channel, the inlet channel and the outlet channel are communicated through a valve port, the valve core is slidably inserted in the valve port, and the valve cover is arranged on the valve seat. The pressure regulating mechanism comprises a pressure regulating cap, an elastic sealing element and an adapter assembly. The pressure regulating cap is arranged on the valve cover and is threadedly connected with the valve cover. The elastic sealing element is arranged at the bottom of the valve cover. The adapter assembly penetrates through the top wall of the valve cover and is arranged between the top of the pressure regulating cap and the elastic sealing element. The top end of the valve rod is connected with the elastic sealing element. The lubricating mechanism comprises an oil applying assembly and an oil supplying assembly. The oil applying assembly is arranged on the outer wall of the valve core in a circumferential direction. The oil supplying assembly is arranged in the pressure regulating cap. The oil supplying assembly can supply oil to the oil applying assembly. The application can lubricate the valve core and the valve seat and reduce the friction between the valve core and the valve seat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a pressure regulating valve. BACKGROUND

[0002] In industrial production, pressure regulating valves are often used to regulate the pressure in the pipeline. The existing pressure regulating valves on the market have at least the following problems in the working process: the valve seat of the existing pressure regulating valve is provided with an inlet channel and an outlet channel, the inlet channel and the outlet channel are communicated through a valve port, a valve core is used to block the valve port, the valve core can reciprocate in the valve seat, and the valve core and the valve seat will be worn during the movement. When the pressure regulating valve is used, the valve core and the valve seat are greatly worn and are prone to deformation damage, and the service life is short.

[0003] Therefore, there is an urgent need for a pressure regulating valve to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a pressure regulating valve which can lubricate between the valve core and the valve seat, reduce the friction between the valve core and the valve seat, and improve the service life.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A pressure regulating valve comprises a valve seat, a valve cover, a valve core and a valve rod connected to the valve core at the bottom end, the valve seat is provided with an inlet channel and an outlet channel, the inlet channel and the outlet channel are communicated through a valve port, the valve core is slidably inserted in the valve port, the valve cover is provided on the valve seat, and the pressure regulating valve further comprises:

[0007] A pressure regulating mechanism comprises a pressure regulating cap, an elastic sealing element and an adapter assembly, the pressure regulating cap is provided on the valve cover and is threadedly connected with the valve cover, the elastic sealing element is arranged at the bottom of the valve cover, the adapter assembly penetrates through the top wall of the valve cover and is arranged between the top of the pressure regulating cap and the elastic sealing element in the valve cover, and the top end of the valve rod is connected with the elastic sealing element; when the pressure regulating cap is rotated, the pressure applied by the adapter assembly to the elastic sealing element can be adjusted;

[0008] A lubricating mechanism comprises an oil applying assembly and an oil supplying assembly, the oil applying assembly is arranged circumferentially on the outer wall of the valve core, and the oil supplying assembly is arranged in the pressure regulating cap, and the oil supplying assembly can supply oil to the oil applying assembly.

[0009] Optionally, the pressure regulating mechanism further comprises a second mounting seat, the second mounting seat is arranged on the side of the elastic sealing element facing the valve rod, a plug hole is arranged in the second mounting seat, and the valve rod is inserted into the plug hole.

[0010] Optionally, the pressure regulating mechanism further comprises an elastic pressing member, a top end of the elastic pressing member abutting against a top portion in the valve cover, and a bottom end of the elastic pressing member pressing against the elastic sealing member.

[0011] Optionally, the pressure regulating mechanism further comprises a first mounting seat, the first mounting seat being arranged at one end of the elastic sealing member towards the elastic pressing member, and a mounting groove being formed at one end of the first mounting seat towards the elastic pressing member, and the bottom end of the elastic pressing member being located in the mounting groove.

[0012] Optionally, the adapter assembly comprises:

[0013] an outer sleeve and an inner sleeve, the outer sleeve being sleeved on the inner sleeve, a bottom end of the inner sleeve being connected to the elastic sealing member, a top end of the inner sleeve being provided with an elastic expansion portion, the elastic expansion portion abutting against a top portion in the pressure regulating cap, and the outer sleeve penetrating through a top wall of the valve cover.

[0014] Optionally, a plurality of universal balls are uniformly and circumferentially arranged on an outer wall of the inner sleeve, and the universal balls abut against an inner wall of the outer sleeve.

[0015] Optionally, an oil inlet channel is formed in the valve stem and the valve core and communicates with the oil applying assembly, the inner sleeve and the oil inlet channel are in communication, and the oil supply assembly comprises:

[0016] an oil storage bin arranged at a top portion in the pressure regulating cap, and a top portion of the inner sleeve abutting against a bottom wall of the oil storage bin;

[0017] a mounting plate arranged in the inner sleeve;

[0018] an oil supply tank arranged on the mounting plate;

[0019] a sliding plate sleeved on the oil supply tank, a first protrusion being protruded on an inner wall of the inner sleeve, and a second protrusion being protruded on the sliding plate; when the inner sleeve is raised, the first protrusion can drive the second protrusion to be raised;

[0020] an oil supply pipe and a measuring cup, a bottom end of the oil supply pipe being closed and connected to the sliding plate, the measuring cup being arranged in the oil storage bin, a top end of the oil supply pipe and the measuring cup being in communication, a vertical extending clamping groove being formed in a side wall of the oil supply tank, and the oil supply pipe being vertically and slidingly clamped in the clamping groove; an oil outlet being formed in a side wall of the oil supply pipe, an oil inlet being formed in the oil supply tank, and the oil supply pipe being capable of being slid to a position corresponding to the oil outlet and the oil inlet;

[0021] an elastic reset member sleeved on the oil supply pipe, a bottom end of the elastic reset member abutting against a middle portion of the oil supply pipe, and a top end of the elastic reset member being capable of abutting against a bottom wall of the oil storage bin.

[0022] Optionally, a groove is formed in the outer wall of the valve core in the circumferential direction, and the oil application assembly comprises:

[0023] An oil application block and a mounting member are arranged in the groove, and the oil application block is connected to the side of the mounting member facing the outside of the valve core;

[0024] An elastic connecting member is connected to the bottom of the groove at one end and to the mounting member at the other end.

[0025] Optionally, the oil application assembly further comprises a guide rod, one end of the guide rod is connected to the mounting member, a guide hole is formed in the bottom of the groove, and the other end of the guide rod is slidably inserted into the guide hole.

[0026] Optionally, the valve seat comprises a seat body and a seat cover, the seat cover and the seat body are detachably connected, and the valve cover is arranged on the seat cover.

[0027] The present application has the following beneficial effects:

[0028] The pressure regulating valve of the present application comprises a valve seat, a valve cover, a valve core, a valve rod connected to the bottom end of the valve core, a pressure regulating mechanism and a lubricating mechanism. Through the arrangement of the pressure regulating mechanism, when the pressure regulating cap is rotated, the pressure exerted by the elastic sealing member on the valve rod can be adjusted through the adapter assembly. The lubricating mechanism comprises an oil application assembly and an oil supply assembly. The oil application assembly is arranged in the circumferential direction of the outer wall of the valve core, and the oil supply assembly is arranged in the pressure regulating cap. The oil supply assembly can supply oil to the oil application assembly. Through the oil supply assembly supplying oil to the oil application assembly, the oil application assembly can apply lubricating oil to the inner wall of the valve seat in contact with the valve core, thereby reducing the wear between the valve core and the valve seat and improving the service life. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a partial cross-sectional view of the pressure regulating valve provided by the embodiment of the present application;

[0030] Figure 2 is a partial cross-sectional view of the pressure regulating valve after removing the seat body provided by the embodiment of the present application;

[0031] Figure 3 is a partial cross-sectional view of the adapter assembly and the oil supply assembly provided by the embodiment of the present application;

[0032] Figure 4 is an exploded view of the oil supply tank and the oil supply pipe provided by the embodiment of the present application;

[0033] Figure 5 is a cross-sectional view of the valve core and the oil application assembly provided by the embodiment of the present application.

[0034] In the drawings:

[0035] 1, valve seat; 11, inlet passage; 12, outlet passage; 13, valve port; 14, seat body; 15, seat cover;

[0036] 2, valve cover;

[0037] 3, valve core;

[0038] 4, valve stem;

[0039] 5, pressure regulating mechanism; 51, pressure regulating cap; 52, elastic sealing element; 53, adapter assembly; 531, outer sleeve; 532, inner sleeve; 533, universal ball; 5321, elastic telescopic part; 54, elastic pressing element; 55, first mounting seat; 56, second mounting seat;

[0040] 6, lubricating mechanism; 61, oil applying assembly; 611, oil applying block; 612, mounting element; 613, elastic connecting element; 614, guide rod; 62, oil supply assembly; 621, oil storage bin; 622, mounting plate; 623, oil supply tank; 6231, clamping groove; 6232, oil inlet; 624, sliding plate; 625, oil supply pipe; 6251, oil outlet; 626, measuring cup; 627, elastic reset element; 628, first protrusion; 629, second protrusion; 6210, limiting part; 63, oil inlet passage. DETAILED DESCRIPTION

[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0042] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Unless specifically stated and defined otherwise, "on" or "under" of a first feature in relation to a second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature in relation to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature in relation to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0044] The technical solutions of the present application will be further illustrated below in combination with the drawings and through specific embodiments.

[0045] The present embodiment provides a pressure regulating valve, as shown in the drawings, the pressure regulating valve comprises a valve seat 1, a valve cover 2, a valve core 3, a valve rod 4 connected with the valve core 3 at a bottom end, a pressure regulating mechanism 5 and a lubricating mechanism 6, the valve seat 1 is provided with an inlet passage 11 and an outlet passage 12, the inlet passage 11 and the outlet passage 12 are communicated through a valve port 13, the valve core 3 is slidingly inserted in the valve port 13, and the valve cover 2 is covered on the valve seat 1. Figures 1 to 3

[0046] In detail, the pressure regulating mechanism 5 comprises a pressure regulating cap 51, an elastic sealing member 52 and an adapter assembly 53, the pressure regulating cap 51 is covered on the valve cover 2 and is threadedly connected with the valve cover 2, and the elastic sealing member 52 is arranged at a bottom portion in the valve cover 2. The adapter assembly 53 penetrates a top wall of the valve cover 2 and is arranged between a top portion in the pressure regulating cap 51 and the elastic sealing member 52, and a top end of the valve rod 4 is arranged at the elastic sealing member 52. When the pressure regulating cap 51 is rotated, the pressure applied by the elastic sealing member 52 to the valve rod 4 can be adjusted through the adapter assembly 53. Optionally, the elastic sealing member 52 is a diaphragm, which can be made of butyronitrile rubber.

[0047] The lubricating mechanism 6 comprises an oil coating assembly 61 and an oil supply assembly 62, the oil coating assembly 61 is arranged circumferentially on an outer wall of the valve core 3, and the oil supply assembly 62 is arranged in the pressure regulating cap 51 and can supply oil to the oil coating assembly 61. By supplying oil to the oil coating assembly 61 through the oil supply assembly 62, the oil coating assembly 61 can coat lubricating oil on an inner wall of the valve seat 1 in contact with the valve core 3, so as to reduce the abrasion between the valve core 3 and the valve seat 1 and facilitate to improve the service life.

[0048] As shown in the drawings, Figure 1 ​As shown, the pressure regulating mechanism 5 further comprises an elastic pressing member 54, a top end of the elastic pressing member 54 abuts against a top portion in the valve cover 2, and a bottom end of the elastic pressing member 54 abuts against the elastic sealing member 52. It can be understood that, by arranging the elastic pressing member 54, the elastic pressing member 52 is subjected to elastic force, and the elastic sealing member 52 is subjected to pre-pressure, which is beneficial to balance the overall stress of the elastic sealing member 52, and thus beneficial to keep the overall structure stable. In detail, the elastic pressing member 54 is a spring.

[0049] In some optional embodiments, the pressure regulating mechanism 5 further comprises a first mounting seat 55, the first mounting seat 55 is arranged at one end of the elastic sealing member 52 which is towards the elastic pressing member 54, a mounting groove is arranged at one end of the first mounting seat 55 which is towards the elastic pressing member 54, and the bottom end of the elastic pressing member 54 is located in the mounting groove, so that the elastic pressing member 54 can be limited.

[0050] In order to facilitate the installation of the valve rod 4, as shown in Figure 1 and Figure 2 the pressure regulating mechanism 5 further comprises a second mounting seat 56, the second mounting seat 56 is arranged at one side of the elastic sealing member 52 which is towards the valve rod 4, a plug hole is arranged in the second mounting seat 56, and the valve rod 4 is plugged into the plug hole.

[0051] As shown in Figure 2 and Figure 3 the adapter assembly 53 comprises an outer sleeve 531 and an inner sleeve 532. The outer sleeve 531 is sleeved on the inner sleeve 532, a bottom end of the inner sleeve 532 is connected to the elastic sealing member 52, a top end of the inner sleeve 532 is provided with an elastic expansion portion 5321 which abuts against a top portion in the pressure regulating cap 51, and the outer sleeve 531 penetrates through a top wall of the valve cover 2. It can be understood that, by rotating the pressure regulating cap 51, the elastic sealing member 52 is subjected to elastic force through the inner sleeve 532, and the elastic sealing member 52 acts the elastic force on the valve rod 4, so that the distance between the valve core 3 and the valve port 13 can be controlled. When the valve core 3 is subjected to the action force of the fluid to move upward and away from the valve port 13, the outer sleeve 531 can limit the distance of the upward movement of the valve core 3.

[0052] In this embodiment, preferably, a plurality of universal balls 533 are circumferentially and uniformly spaced apart on an outer wall of the inner sleeve 532, and the universal balls 533 abut against an inner wall of the outer sleeve 531. The universal balls 533 can limit the position of the inner sleeve 532 in the outer sleeve 531, and also enable the inner sleeve 532 to stably move relative to the outer sleeve 531.

[0053] As shown in Figures 2 to 4As shown, the valve stem 4 and the valve core 3 are provided with an oil inlet channel 63 communicated to the oiling assembly 61, the inner sleeve 532 is communicated with the oil inlet channel 63, and the oil supply assembly 62 comprises an oil storage compartment 621, a mounting plate 622, an oil supply tank 623, a sliding plate 624, an oil supply pipe 625, a measuring cup 626 and an elastic reset member 627. The oil storage compartment 621 is arranged at the top of the pressure regulating cap 51, and the top of the inner sleeve 532 abuts against the bottom wall of the oil storage compartment 621. The mounting plate 622 is arranged in the inner sleeve 532. The oil supply tank 623 is arranged on the mounting plate 622. The sliding plate 624 is sleeved on the oil supply tank 623, the inner wall of the inner sleeve 532 is provided with a first protrusion 628, and the sliding plate 624 is provided with a second protrusion 629. When the inner sleeve 532 rises, the first protrusion 628 can drive the second protrusion 629 to rise. The bottom end of the oil supply pipe 625 is closed and connected to the sliding plate 624, the measuring cup 626 is arranged in the oil storage compartment 621, the top end of the oil supply pipe 625 is communicated with the measuring cup 626, the side wall of the oil supply tank 623 is provided with a vertically extending clamping groove 6231, and the oil supply pipe 625 is vertically slidably clamped in the clamping groove 6231. The side wall of the oil supply pipe 625 is provided with an oil outlet 6251, the oil supply tank 623 is provided with an oil inlet 6232, and the oil supply pipe 625 can be slid to a position corresponding to the oil outlet 6251 and the oil inlet 6232. The elastic reset member 627 is sleeved on the oil supply pipe 625, the bottom end abuts against the middle part of the oil supply pipe 625, and the top end can abut against the bottom wall of the oil storage compartment 621. Optionally, the elastic reset member 627 is a spring. The outer wall of the oil supply pipe 625 is provided with a limiting portion 6210, and the bottom end of the spring abuts against the limiting portion 6210, so that the spring can drive the oil supply pipe 625 to reset.

[0054] In detail, under the action of the fluid pressure in the valve seat 1, when the valve core 3 moves away from the valve port 13 and drives the valve stem 4 to move upward, the valve stem 4 drives the elastic sealing member 52 to move upward, thereby driving the inner sleeve 532 to move upward. When the inner sleeve 532 moves upward, the first protrusion 628 drives the second protrusion 629 and the sliding plate 624 to move upward, the sliding plate 624 drives the oil supply pipe 625 to move upward. In the process of moving upward of the oil supply pipe 625, the oil outlet 6251 and the oil inlet 6232 are communicated, lubricating oil can flow from the measuring cup 626 into the oil supply pipe 625, and then flow from the oil supply pipe 625 into the oil storage tank, and then the lubricating oil in the oil storage tank flows into the inner sleeve 532, and then flows into the valve stem 4 through the inner sleeve 532, and then flows into the oiling assembly 61 through the oil inlet channel 63, thereby achieving the lubrication of the valve seat 1. In addition, in the process of rising of the measuring cup 626, the top of the measuring cup 626 is higher than the liquid level in the oil outlet compartment, so that the measuring cup 626 can quantitatively deliver lubricating oil to the oiling assembly 61.

[0055] As Figure 2 and Figure 5As shown, a groove is circumferentially formed on the outer wall of the valve core 3. The oiling assembly 61 includes an oiling block 611, a mounting member 612, and an elastic connector 613. The oiling block 611 and the mounting member 612 are disposed within the groove, with the oiling block 611 connected to the side of the mounting member 612 facing the outside of the valve core 3. One end of the elastic connector 613 is connected to the bottom of the groove, and the other end is connected to the mounting member 612. The mounting member 612 has a hollow structure to allow lubricating oil to pass through. Specifically, under the elastic force of the elastic member, the oiling block 611 can always abut against the inner wall of the valve seat 1, achieving lubrication between the valve seat 1 and the valve core 3 and reducing wear. Optionally, the elastic connector 613 is a spring.

[0056] To ensure the oiling block 611 can move stably within the groove, the oiling assembly 61 also includes a guide rod 614. One end of the guide rod 614 is connected to the mounting member 612. A guide hole is provided at the bottom of the groove, and the other end of the guide rod 614 is slidably inserted into the guide hole. Optionally, multiple elastic connectors 613 can be provided, with the multiple elastic connectors 613 evenly spaced around the axis of the valve core 3. Correspondingly, multiple guide rods 614 are provided, with each elastic connector 613 fitted onto one guide rod 614. The guide rods 614 can guide the elastic connectors 613.

[0057] like Figure 1 As shown, the valve seat 1 includes a seat body 14 and a seat cover 15. The seat cover 15 and the seat body 14 are detachably connected. The valve cover 2 is disposed on the seat cover 15, which facilitates the processing of the valve seat 1.

[0058] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A pressure regulating valve comprising a valve seat (1), a valve cover (2), a valve core (3) and a valve rod (4) connected with the valve core (3) at a bottom end, the valve seat (1) is provided with an inlet channel (11) and an outlet channel (12), the inlet channel (11) and the outlet channel (12) are communicated through a valve port (13), the valve core (3) is slidingly inserted in the valve port (13), the valve cover (2) is covered on the valve seat (1), characterized in that, The pressure regulating valve further comprises: A pressure regulating mechanism (5) comprising a pressure regulating cap (51), an elastic sealing member (52) and an adapter assembly (53), the pressure regulating cap (51) is arranged on the valve cover (2) and is threadedly connected with the valve cover (2), the elastic sealing member (52) is arranged at the bottom of the valve cover (2), the adapter assembly (53) penetrates the top wall of the valve cover (2) and is arranged between the top of the pressure regulating cap (51) and the elastic sealing member (52), and the top end of the valve rod (4) is connected with the elastic sealing member (52); When the pressure regulating cap (51) is rotated, the pressure applied by the adapter assembly (53) on the elastic sealing member (52) can be adjusted; A lubricating mechanism (6) comprising an oil applying assembly (61) and an oil supplying assembly (62), the oil applying assembly (61) is arranged on the outer wall of the valve core (3) in a circumferential direction, and the oil supplying assembly (62) is arranged in the pressure regulating cap (51), and the oil supplying assembly (62) can supply oil to the oil applying assembly (61); The adapter assembly (53) comprises: An outer sleeve (531) and an inner sleeve (532), the outer sleeve (531) is slidably sleeved on the inner sleeve (532), the bottom end of the inner sleeve (532) is connected with the elastic sealing member (52), the top end of the inner sleeve (532) is provided with an elastic expansion part (5321) which abuts against the top of the pressure regulating cap (51), and the outer sleeve (531) penetrates the top wall of the valve cover (2); An oil inlet channel (63) is arranged on the valve rod (4) and the valve core (3) and communicates with the oil applying assembly (61), the inner sleeve (532) and the oil inlet channel (63) communicate, and the oil supplying assembly (62) comprises: An oil storage bin (621) arranged at the top of the pressure regulating cap (51), and the top of the inner sleeve (532) abuts against the bottom wall of the oil storage bin (621); An installation plate (622) arranged in the inner sleeve (532); An oil supplying tank (623) arranged on the installation plate (622); A sliding plate (624) slidably sleeved on the oil supplying tank (623), a first protrusion (628) is arranged on the inner wall of the inner sleeve (532), and a second protrusion (629) is arranged on the sliding plate (624), and when the inner sleeve (532) rises, the first protrusion (628) can drive the second protrusion (629) to rise. An oil supply pipe (625) and a measuring cup (626), the bottom end of the oil supply pipe (625) is closed and connected to the sliding plate (624), the measuring cup (626) is arranged in the oil storage compartment (621), the top end of the oil supply pipe (625) is communicated with the measuring cup (626), the side wall of the oil supply tank (623) is provided with a vertically extending clamping groove (6231), and the oil supply pipe (625) is vertically and clampingly connected in the clamping groove (6231); the side wall of the oil supply pipe (625) is provided with an oil outlet (6251), the oil supply tank (623) is provided with an oil inlet (6232), and the oil supply pipe (625) can be slid to a position corresponding to the oil outlet (6251) and the oil inlet (6232); An elastic reset member (627) is sleeved on the oil supply pipe (625), the bottom end abuts against the middle part of the oil supply pipe (625), and the top end can abut against the bottom wall of the oil storage compartment (621).

2. The pressure regulating valve of claim 1, wherein The pressure regulating mechanism (5) further comprises a second mounting seat (56), which is arranged on one side of the elastic sealing member (52) facing the valve rod (4), and a plug hole is arranged in the second mounting seat (56), and the valve rod (4) is plugged into the plug hole.

3. The pressure regulating valve of claim 1, wherein The pressure regulating mechanism (5) further comprises an elastic pressing member (54), the top end of the elastic pressing member (54) abuts against the top part in the valve cover (2), and the bottom end abuts against the elastic sealing member (52).

4. The pressure regulating valve of claim 3, wherein The pressure regulating mechanism (5) further comprises a first mounting seat (55), which is arranged on one end of the elastic sealing member (52) facing the elastic pressing member (54), and a mounting groove is arranged in one end of the first mounting seat (55) facing the elastic pressing member (54), and the bottom end of the elastic pressing member (54) is located in the mounting groove.

5. The pressure regulating valve of claim 1, wherein A plurality of universal balls (533) are uniformly and spacedly arranged on the outer wall of the inner sleeve (532), and the universal balls (533) abut against the inner wall of the outer sleeve (531).

6. The pressure regulating valve of claim 1, wherein The outer wall of the valve core (3) is provided with a groove in the circumference, and the oil applying assembly (61) comprises: An oil applying block (611) and a mounting member (612) are arranged in the groove, and the oil applying block (611) is connected to one side of the mounting member (612) facing the outside of the valve core (3); An elastic connecting member (613) is connected to one end of the groove bottom and the other end of the mounting member (612).

7. The pressure regulating valve of claim 6, wherein The oil applying assembly (61) further comprises a guide rod (614), one end of the guide rod (614) is connected to the mounting member (612), a guide hole is arranged in the groove bottom, and the other end of the guide rod (614) is slidably inserted into the guide hole.

8. The pressure regulating valve of claim 1, wherein The valve seat (1) comprises a seat body (14) and a seat cover (15), the seat cover (15) and the seat body (14) are detachably connected, and the valve cover (2) is arranged on the seat cover (15).

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