Energy-saving regeneration valve capable of recycling return oil

Abstract

The energy-saving regeneration valve comprises a front end cover, a rear end cover and a main valve body, and the main valve body is arranged in the front end cover and the rear end cover; the main valve body comprises a valve element control assembly and a valve element reversing assembly. The valve element reversing assembly communicates with an oil inlet, and the oil inlet communicates with the valve element control assembly through a second one-way valve. The end, connected with the second one-way valve, of the valve element control assembly is connected with an oil outlet through a first one-way valve. The valve element control assembly is connected with the valve element reversing assembly. The valve element control assembly and the valve element reversing assembly are connected with the oil return opening. The oil duct between the valve element reversing assembly and the valve element control assembly is novel in design, simple in structure, convenient to maintain, easy to machine and low in cost. The valve element reversing assembly and the valve element control assembly are connected with the oil return opening, so that part of return oil of the system can be collected and reused; low-pressure return oil is converted into high-pressure output, part of return oil is collected through a collecting system and converted into part of power input system through a regeneration valve, and energy conservation and consumption reduction of the hydraulic system are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of regeneration valve equipment, and in particular to an energy-saving regeneration valve for recycling returned oil. Background Art

[0002] Energy-saving regeneration valve is a specially designed valve mainly used in fluid control systems. It aims to improve the overall energy efficiency of the system by optimizing the fluid flow path and reducing energy loss. This valve is usually used in heat exchange systems, air conditioning systems, refrigeration systems and other application scenarios that require efficient fluid control.

[0003] The current energy-saving regenerative valve generally uses the hydraulic system for energy saving only by installing an accumulator. The accumulator is used to provide the system with the required pressure in a certain period of time. When the accumulator pressure is released, the power source needs to replenish the pressure in time. Repeated charging and releasing can prevent the power source from being in a working state all the time, thereby achieving a certain amount of energy saving. Therefore, the existing regenerative energy-saving valve still needs a power source to provide a certain power output when used. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an energy-saving regeneration valve for oil return and reuse, which solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] An energy-saving regeneration valve for oil return and reuse comprises a front end cover, a rear end cover and a main valve body, wherein the front end cover and the rear end cover are provided with a main valve body; the main valve body comprises a valve core control assembly and a valve core reversing assembly; the valve core reversing assembly is connected to the oil inlet, and the oil inlet is connected to the valve core control assembly through a second check valve; the end of the valve core control assembly connected to the second check valve is connected to the oil outlet through a first check valve; the valve core control assembly is connected to the valve core reversing assembly; the valve core control assembly and the valve core reversing assembly are connected to the oil return port.

[0007] The valve core control assembly includes a flow groove, a piston cavity, a piston body, a boosting cavity and a boosting valve core; one side of the piston cavity is connected to the boosting cavity, and the piston cavity is slidably connected to the piston body; the side of the piston body is connected to the boosting valve core, and the boosting valve core is slidably connected to the boosting cavity; a flow groove is provided on the outer surface of the end of the boosting valve core connected to the piston body; the one-way valve 1 and the one-way valve 2 are connected to one side of the boosting cavity, and one side of the piston cavity is connected to the oil return port through the oil passage 4; the other side of the piston cavity is connected to the valve core reversing assembly through the oil passage 6 and the oil passage 7;

[0008] When the piston body and the boost valve core are at the leftmost end, the boost chamber is connected to the valve core reversing assembly through the oil passage 3 and the oil passage 2, and the valve core reversing assembly is repositioned;

[0009] When the piston body and the boost valve core are at the rightmost end, the oil passage 2, the oil passage 3, the flow groove, the piston cavity, the oil passage 4 and the oil return port are connected; the valve core reversing assembly is reset.

[0010] Furthermore, the valve core reversing assembly includes cavity one, cavity two and a reversing valve body; the two ends of the reversing valve body form cavity one and cavity two; one end of the reversing valve body is connected to the oil inlet, oil channel one and oil channel seven; the other end of the reversing valve body is connected to oil channel two; one end of the reversing valve body is connected to the oil return port through oil channel nine; the oil channel six is ​​connected to oil channel three through oil channel five.

[0011] Furthermore, the width of the boost chamber is the same as the width of the boost valve core, and the cross-section of the boost valve core adopts an inverted "T"-shaped structure.

[0012] Furthermore, the oil outlet, the oil return port and the oil inlet extend outward to form a connector, and the connector is cooperatively connected with a connecting pipe.

[0013] Furthermore, the connector includes a sealing ring 1, a positioning ring, a sealing ring 2 and an outer tube body; a positioning ring is provided on the inner wall of the outer tube body, and sealing rings 1 and 2 are provided on the inner wall of the outer tube body; a plug is formed at one end of the connecting tube; and the plug cooperates with the connecting positioning ring.

[0014] Furthermore, the cross-section of the outer wall of the insertion end of the plug is a triangular structure, and the cross-section of the positioning ring adopts a structure with one end being arc-shaped and the other end being inclined; the inclined structure of the positioning ring cooperates with the triangular structure of the plug.

[0015] Furthermore, the inner wall of the sealing ring 1 is an inclined structure, and the inclined structure of the sealing ring 1 is adapted to the triangular structure of the plug; the outer wall of the sealing ring 2 is convex to form a rectangular and triangular cross-section, and the outer wall of the sealing ring 2 is adapted to the inner wall of the outer tube body.

[0016] Furthermore, the outer walls of the outer tube body and the connecting tube are both provided with a threaded structure, and the threaded structure cooperates with a connecting locking sleeve; the locking sleeve is used to strengthen the connection between the outer tube body and the connecting tube.

[0017] Furthermore, a groove is provided at the center of the inner wall of the locking sleeve, and a sealing ring three with an arc-shaped cross-section is provided in the groove; the sealing ring three and the groove are connected to a sealing ring four with an inclined cross-section; the sealing ring four is used to strengthen the sealing performance of the connection between the outer tube body and the connecting tube.

[0018] The present invention provides an energy-saving regeneration valve for oil return and reuse. Compared with the prior art, it has the following beneficial effects:

[0019] The energy-saving regeneration valve of the present invention has a novel oil passage design between the valve core reversing assembly and the valve core control assembly, a simple structure, easy maintenance, simple processing and low cost. The connection between the valve core reversing assembly and the valve core control assembly and the oil return port can collect and reuse part of the system return oil; convert low-pressure return oil into high-pressure output, rely on collecting part of the system return oil, and convert it into part of the power input system through the regeneration valve, so that the energy saving and consumption reduction of the hydraulic system is greatly improved.

[0020] The energy-saving regeneration valve of the present invention has a connector that can be quickly connected to an external connecting component by plugging. The connector with a special structure is easy to operate and has better sealing performance. At the same time, the locking sleeve can further enhance the sealing performance while enhancing the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the connection structure of the energy-saving regeneration valve for oil return and reuse of the present invention is shown;

[0023] Figure 2 The schematic diagram of the external structure of the energy-saving regeneration valve for oil return and reuse of the present invention is shown;

[0024] Figure 3 The schematic diagram of the internal structure of the energy-saving regeneration valve for oil return and reuse of the present invention is shown;

[0025] Figure 4 A schematic diagram of the partial internal structure of the energy-saving regeneration valve for oil return and reuse of the present invention is shown;

[0026] Figure 5 A schematic diagram showing the connection between the energy-saving regeneration valve connector and the connecting pipe for oil return and reuse of the present invention is shown;

[0027] Figure 6 The present invention is shown Figure 5 Schematic diagram of the enlarged structure at A in FIG.

[0028] As shown in the figure: 1. Front cover; 2. Rear cover; 3. Connector; 4. Main valve body; 5. Valve core control assembly; 6. Valve core reversing assembly; 7. One-way valve 1; 8. One-way valve 2; 9. Oil outlet; 10. Oil return port; 11. Oil inlet; 12. Oil channel 1; 13. Oil channel 9; 14. Oil channel 2; 15. Oil channel 3; 16. Oil channel 4; 17. Oil channel 5; 18. Oil channel 6; 19. Oil channel 7; 20. Oil channel eight; 21. Circulation groove; 22. Piston chamber; 23. Piston body; 24. Pressure-boosting chamber; 25. Pressure-boosting valve core; 26. Cavity one; 27. Cavity two; 28. Reversing valve body; 29. ​​Sealing ring one; 30. Positioning ring; 31. Sealing ring two; 32. Outer tube body; 33. Connecting tube; 34. Plug; 35. Locking sleeve; 36. Sealing ring three; 37. Sealing ring four. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In order to solve the technical problems in the background technology, an energy-saving regeneration valve for oil return and reuse is provided as follows:

[0031] It includes a front cover 1, a rear cover 2 and a main valve body 4, such as Figure 3 The front cover 1 and the rear cover 2 are provided with a main valve body 4; the main valve body 4 includes a valve core control component 5 and a valve core reversing component 6; Figure 4 The specific connection channels between the valve core control component 5 and the valve core reversing component 6 are as follows: Figure 1 As shown, the oil inlet 11 is connected to the valve core reversing assembly 6, and the oil inlet 11 supplies oil to the valve core reversing assembly 6; and the oil inlet 11 is connected to the valve core control assembly 5 through the one-way valve 2 8, and the oil inlet 11 supplies oil to the valve core control assembly 5 through the one-way valve 2 8; the end of the valve core control assembly 5 connected to the one-way valve 2 8 is connected to the oil outlet 9 through the one-way valve 1 7; the valve core control assembly 5 is connected to the valve core reversing assembly 6; the valve core control assembly 5 and the valve core reversing assembly 6 are connected to the oil return port 10.

[0032] Specifically, the valve core control assembly 5 includes a flow groove 21, a piston cavity 22, a piston body 23, a boosting cavity 24 and a boosting valve core 25; one side of the piston cavity 22 is connected to the boosting cavity 24, for example, Figure 1As shown, the right side of the piston chamber 22 is connected to the boost chamber 24, and the piston chamber 22 is slidably connected to the piston body 23; the side of the piston body 23 is connected to the boost valve core 25, and the boost valve core 25 is slidably connected to the boost chamber 24; the outer surface of the end of the boost valve core 25 connected to the piston body 23 is provided with a flow groove 21; the one-way valve 1 7 and the one-way valve 2 8 are connected to one side of the boost chamber 24, specifically, the one-way valve 1 7 and the one-way valve 2 8 are connected to the right side of the boost chamber 24, and the piston One side of the cavity 22 is connected to the oil return port 10 through the oil passage 4 16, that is, the piston cavity 22 is divided into two parts by the piston body 23, including a cavity on the right side of the piston body 23 and a cavity on the left side of the piston body 23, and the cavity on the right side of the piston body 23 is connected to the oil return port 10 through the oil passage 4 16; the other side of the piston cavity 22 is connected to the valve core reversing assembly 6 through the oil passage 6 18 and the oil passage 7 19, that is, the cavity on the left side of the piston body 23 is connected to the valve core reversing assembly 6 through the oil passage 6 18 and the oil passage 7 19;

[0033] The states of the piston body 23 and the boost valve core 25 when they move are as follows:

[0034] When the piston body 23 and the boost valve core 25 are at the leftmost end, the boost chamber 24 is connected to the valve core reversing assembly 6 through the oil passage 3 15 and the oil passage 2 14 to change the position of the valve core reversing assembly 6;

[0035] When the piston body 23 and the boost valve core 25 are at the rightmost end, the oil passage 2 14 , the oil passage 3 15 , the flow groove 21 , the piston chamber 22 , the oil passage 4 16 are connected with the oil return port 10 ; the valve core reversing assembly 6 is reset.

[0036] The valve core reversing assembly 6 includes a cavity 1 26, a cavity 27 and a reversing valve body 28; the two ends of the reversing valve body 28 form a cavity 1 26 and a cavity 2 27; one end of the reversing valve body 28 is connected to the oil inlet 11, the oil passage 1 12 and the oil passage 7 19; the other end of the reversing valve body 28 is connected to the oil passage 2 14; one end of the reversing valve body 28 is connected to the oil return port 10 through the oil passage 9 13; the oil passage 6 18 is connected to the oil passage 3 15 through the oil passage 5 17.

[0037] The width of the boosting chamber 24 is the same as the width of the boosting valve core 25 , and the cross section of the boosting valve core 25 adopts an inverted “T”-shaped structure.

[0038] When the energy-saving regeneration valve of the present invention is in use, the input pressure oil acts on the cavity 27 at the left end of the reversing valve body 28 through the oil inlet 11 and the oil passage 1 12, so that the reversing valve body 28 is kept in the left position. At this time, the oil passage 7 19 is connected with the oil passage 9 13 through the reversing valve body 28; at the same time, the pressure oil of the oil inlet 11 enters the boosting chamber 24 through the oil passage 8 20 and the check valve 28, pushes the boosting valve core 25, acts on the right end of the piston body 23, and makes the piston body 23 and the boosting valve core 25 move to the left as a whole. At this time, the hydraulic oil in the left end of the piston chamber 22 The oil returns to the oil return port 10 through the oil passage 6 18, the oil passage 7 19, the reversing valve body 28, and the oil passage 9 13. When the boost valve core 25 pushes the piston body 23 to move to the leftmost end, the oil passage 3 15 is connected with the boost chamber 24, and the piston body 23 and the boost valve core 25 no longer move. The pressure oil in the boost chamber 24 acts on the right end cavity 1 26 of the reversing valve body 28 through the oil passage 3 15 and the oil passage 2 14. Because the area of ​​the cavity 1 26 at the right end of the reversing valve body 28 is larger than the area of ​​the cavity 2 27 at the left end, the same pressure acts on the right end cavity 1 26 of the reversing valve body 28. The force at cavity 1 26 is relatively large, pushing the valve core of the reversing valve body 28 to change direction. At this time, the oil inlet 11 is connected with the oil passage 7 19 through the reversing valve body 28; the reversing valve body 28 is in the right position. At this time, the pressure oil at the oil inlet 11 enters the left end of the piston cavity 22 through the port A at the reversing valve body 28, the oil passage 7 19, and the oil passage 6 18, so that the piston body 23 moves to the right, pushing the boost valve core 25 to move to the right, and outputting the high pressure of the pressure oil in the boosting cavity 24 to the oil outlet 9 through the one-way valve 1 7. At the same time, the pressure oil is replenished through the oil passage 5 17. The oil is filled in the cavity 1 26 of the reversing valve to keep it in the right position. When the boost valve core 25 moves to the rightmost end, the oil channel 3 15 is connected with the cavity on the right side of the piston cavity 22 through the flow groove 21 and is connected with the oil channel 4 16; that is, the oil channel 3 15 is connected with the oil channel 4 16 through the flow groove 21, and the pressure oil acting on the cavity 1 26 at the right end of the reversing valve body 28 returns to the oil return port 10 through the oil channel 2 14, the oil channel 3 15, the flow groove 21 and the oil channel 4 16, and the reversing valve body 28 is reversed to the left position, and this movement is repeated to achieve continuous high-pressure output.

[0039] In order to facilitate the connection of the energy-saving regeneration valve for oil return reuse with the oil return tank, valve block, accumulator, etc., the oil outlet 9, the oil return port 10 and the oil inlet 11 extend outward to form a connector 3, such as Figure 2 As shown, the connector 3 is connected with the connecting pipe 33. The connecting pipe 33 is connected with the return oil tank, valve block, accumulator, etc., and then the connector 3 is connected with the connecting pipe 33 to complete the installation of the energy-saving regeneration valve, which is convenient for subsequent use.

[0040] like Figure 5 and Figure 6As shown, the connector 3 includes a sealing ring 29, a positioning ring 30, a sealing ring 31 and an outer tube body 32; the inner wall of the outer tube body 32 is provided with a positioning ring 30, and the inner wall of the outer tube body 32 is provided with a sealing ring 29 and a sealing ring 31; one end of the connecting tube 33 forms a plug 34; the plug 34 cooperates with the connecting positioning ring 30.

[0041] In order to lock the inserted plug 34 and prevent the connecting tube 33 from falling off after connection, the cross-section of the outer wall of the insertion end of the plug 34 is a triangular structure, and the cross-section of the positioning ring 30 adopts a structure with one end being arc-shaped and the other end being inclined; the inclined structure of the positioning ring 30 cooperates with the triangular structure of the plug 34 connected.

[0042] In order to enhance the overall sealing performance and avoid leakage, the inner wall of the sealing ring 29 is an inclined structure, which is compatible with the triangular structure of the plug 34. The outer wall of the sealing ring 31 is convex to form a rectangular and triangular cross-section, and the outer wall of the sealing ring 31 is compatible with the inner wall of the outer tube body 32.

[0043] In order to further enhance the tightness and sealing of the connection between the connecting tube 33 and the connecting head 3, the outer walls of the outer tube body 32 and the connecting tube 33 are provided with a threaded structure, and the threaded structure cooperates with the connecting locking sleeve 35; the locking sleeve 35 is used to enhance the connection between the outer tube body 32 and the connecting tube 33.

[0044] A groove is provided at the center of the inner wall of the locking sleeve 35, and a sealing ring 36 with an arc-shaped cross-section is provided in the groove; the sealing ring 36 and the groove are connected to a sealing ring 4 37 with an inclined cross-section; the sealing ring 4 37 is used to strengthen the sealing performance of the connection between the outer tube body 32 and the connecting tube 33.

[0045] When installing the regeneration valve, insert the plug 34 of the connecting pipe 33 into the connecting head 3. When the plug 34 is inserted, it passes through the sealing ring 21 and presses the positioning ring 30 until the plug 34 completely passes through the positioning ring 30. The positioning ring 30 has elastic reset, and the positioning ring 30 limits the plug 34. At this time, the plug 34 is adapted to the sealing ring 1 29; the initial position of the locking sleeve 35 is on the outer tube body 32. After the plug 34 is inserted, the locking sleeve 35 is rotated to rotate the locking sleeve 35 into the connecting pipe 33, and the sealing ring 4 37 is pressed during rotation, and the sealing ring 4 37 presses the sealing ring 36; until the groove of the locking sleeve 35 is aligned with the connecting pipe 33 and the outer tube body 32, at this time, the sealing ring 4 37 is pushed out under the elastic force of the sealing ring 36 to seal the connection between the connecting pipe 33 and the outer tube body 32.

[0046] The energy-saving regeneration valve of the present invention has a novel oil passage design between the valve core reversing assembly and the valve core control assembly, a simple structure, easy maintenance, simple processing and low cost. The connection between the valve core reversing assembly and the valve core control assembly and the oil return port can collect and reuse part of the system return oil; convert low-pressure return oil into high-pressure output; and greatly improve the energy saving and consumption reduction of the hydraulic system.

[0047] The energy-saving regeneration valve of the present invention has a connector that can be quickly connected to an external connecting component by plugging. The connector with a special structure is easy to operate and has better sealing performance. At the same time, the locking sleeve can further enhance the sealing performance while enhancing the stability of the connection.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy-saving regeneration valve for oil return and reuse, characterized in that: The invention comprises a front end cover (1), a rear end cover (2) and a main valve body (4), wherein the front end cover (1) and the rear end cover (2) are provided with a main valve body (4); the main valve body (4) comprises a valve core control component (5) and a valve core reversing component (6); the valve core reversing component (6) is connected to an oil inlet (11), and the oil inlet (11) is connected to the valve core control component (5) through a second check valve (8); the end of the valve core control component (5) connected to the second check valve (8) is connected to an oil outlet (9) through a first check valve (7); the valve core control component (5) is connected to the valve core reversing component (6); the valve core control component (5) and the valve core reversing component (6) are connected to an oil return port (10).

2. The energy-saving regeneration valve for oil return and reuse according to claim 1, characterized in that: The valve core control component (5) comprises a circulation groove (21), a piston chamber (22), a piston body (23), a boosting chamber (24) and a boosting valve core (25); one side of the piston chamber (22) is connected to the boosting chamber (24), and the piston chamber (22) is slidably connected to the piston body (23); the side of the piston body (23) is connected to the boosting valve core (25), and the boosting valve core (25) is slidably connected to the boosting chamber (24); the outer surface of the end of the boosting valve core (25) connected to the piston body (23) is provided with a circulation groove (21); the one-way valve 1 (7) and the one-way valve 2 (8) are connected to one side of the boosting chamber (24), and one side of the piston chamber (22) is connected to the oil return port (10) through the oil passage 4 (16); the other side of the piston chamber (22) is connected to the valve core reversing component (6) through the oil passage 6 (18) and the oil passage 7 (19); When the piston body (23) and the boost valve core (25) are at the leftmost end, the boost chamber (24) is connected to the valve core reversing assembly (6) through the oil passage three (15) and the oil passage two (14), and the valve core reversing assembly (6) is repositioned; When the piston body (23) and the boost valve core (25) are at the rightmost end, the oil passage 2 (14), the oil passage 3 (15), the flow groove (21), the piston chamber (22), the oil passage 4 (16) and the oil return port (10) are connected; and the valve core reversing assembly (6) is reset.

3. The energy-saving regeneration valve for oil return and reuse according to claim 2 is characterized in that: The valve core reversing assembly (6) comprises a cavity one (26), a cavity two (27) and a reversing valve body (28); the two ends of the reversing valve body (28) form a cavity one (26) and a cavity two (27); one end of the reversing valve body (28) is connected to the oil inlet (11), the oil passage one (12) and the oil passage seven (19); the other end of the reversing valve body (28) is connected to the oil passage two (14); one end of the reversing valve body (28) is connected to the oil return port (10) through the oil passage nine (13); the oil passage six (18) is connected to the oil passage three (15) through the oil passage five (17).

4. The energy-saving regeneration valve for oil return and reuse according to claim 3 is characterized in that: The width of the boosting chamber (24) is the same as the width of the boosting valve core (25), and the cross section of the boosting valve core (25) adopts an inverted "T"-shaped structure.

5. The energy-saving regeneration valve for oil return and reuse according to claim 1, characterized in that: The oil outlet (9), the oil return port (10) and the oil inlet (11) extend outward to form a connecting head (3), and the connecting head (3) is cooperatively connected to a connecting pipe (33).

6. The energy-saving regeneration valve for oil return and reuse according to claim 5, characterized in that: The connector (3) comprises a sealing ring 1 (29), a positioning ring (30), a sealing ring 2 (31) and an outer tube body (32); the inner wall of the outer tube body (32) is provided with a positioning ring (30), and the inner wall of the outer tube body (32) is provided with a sealing ring 1 (29) and a sealing ring 2 (31); a plug (34) is formed at one end of the connecting tube (33); the plug (34) cooperates with the positioning ring (30) to connect.

7. The energy-saving regeneration valve for oil return and reuse according to claim 6, characterized in that: The outer wall cross section of the insertion end of the plug (34) is a triangular structure, and the cross section of the positioning ring (30) is a structure with one end being arc-shaped and the other end being inclined; the inclined structure of the positioning ring (30) is connected in coordination with the triangular structure of the plug (34).

8. The energy-saving regeneration valve for oil return and reuse according to claim 7, characterized in that: The inner wall of the sealing ring 1 (29) is an inclined structure, and the inclined structure of the sealing ring 1 (29) is compatible with the triangular structure of the plug (34); the outer wall of the sealing ring 2 (31) is convex to form a cross-section of a rectangular and triangular structure, and the outer wall of the sealing ring 2 (31) is compatible with the inner wall of the outer tube body (32).

9. The energy-saving regeneration valve for oil return and reuse according to claim 8, characterized in that: The outer walls of the outer tube body (32) and the connecting tube (33) are both provided with a threaded structure, and the threaded structure cooperates with a connecting locking sleeve (35); the locking sleeve (35) is used to strengthen the connection between the outer tube body (32) and the connecting tube (33).

10. The energy-saving regeneration valve for oil return and reuse according to claim 9, characterized in that: A groove is provided at the center of the inner wall of the locking sleeve (35), and a sealing ring three (36) having an arc-shaped cross section is provided in the groove; the sealing ring three (36) and the groove are connected to a sealing ring four (37) having an inclined cross section; the sealing ring four (37) is used to enhance the sealing performance of the connection between the outer tube body (32) and the connecting tube (33).

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