Pressure reducing valve with energy recovery function

Abstract

The invention relates to a pressure reducing valve with an energy recovery function, and belongs to the technical field of pressure reducing valves, the pressure reducing valve comprises a main body, a crankshaft, a piston, a magnetic shell and a conductor, a circulation channel is arranged in the main body, and a containing groove is formed in the top end of the main body; the crankshaft rotates in the containing groove and is provided with at least two journals. At least two sliding holes communicated with the circulation channel are formed in the bottom of the containing groove; the at least two pistons slide in the at least two sliding holes in a sealed mode respectively, piston rods are hinged to the top ends of the at least two pistons, and the top ends of the at least two piston rods are correspondingly hinged to the at least two shaft necks respectively. The magnetic shell is fixed on the outer side wall of the main body; one end of the crankshaft rotatably extends out of the main body and extends into the magnetic shell; the conductor is located in the magnetic shell and fixed to the crankshaft extending end. High-pressure gas or high-pressure liquid in the circulation channel alternately pushes the at least two pistons to slide in a reciprocating mode, the crankshaft is driven to rotate, the linkage conductor cuts magnetic induction lines of a magnetic field in the magnetic shell, liquid kinetic energy or gas kinetic energy is converted into electric energy, and pressure is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pressure reducing valves, and in particular to a pressure reducing valve with an energy recovery function. Background Art

[0002] A pressure reducing valve is a valve that automatically reduces the working pressure of a pipeline. It can reduce the higher gas or liquid pressure in the pipeline before the valve to the required level of the pipeline after the valve.

[0003] At present, the commonly used pressure reduction methods are generally throttling pressure reduction, hedging pressure reduction or expansion pressure reduction, which is actually to cause a certain amount of energy loss in the pressure reduction process. However, in the process of pressure reduction, a large amount of energy is absorbed by the internal structure of the valve, and the internal structure bears a large pressure and impact, resulting in a significant reduction in the service life of the pressure reducing valve.

[0004] Therefore, how to design a pressure reducing valve with low working pressure, long service life and energy recovery function is a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] The invention provides a pressure reducing valve with an energy recovery function, which solves the technical problems of the existing pressure reducing valves having a relatively high working pressure and a relatively short service life.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a pressure reducing valve with energy recovery function, comprising a main body, wherein a flow channel connecting inlets and outlets on both sides is provided inside the main body, and further comprising: a crankshaft, a piston, a magnetic shell and a conductor,

[0007] The top of the main body is provided with a groove; the crankshaft is placed in the groove and its two ends are rotatably connected to the two inner groove walls opposite to the groove with the axis perpendicular to the height direction of the main body as the axis, the crankshaft axially has at least two journals arranged at intervals, and at least two of the journals are distributed on both sides of the crankshaft; the bottom of the groove is provided with at least two sliding holes that are connected to the circulation channel; there are at least two pistons and they are sealed and slid in at least two sliding holes respectively, the tops of at least two pistons are hinged with piston rods and the bottoms are fixed with baffles that can close the circulation channel, and the tops of at least two piston rods are respectively hinged on at least two journals, so that after high-pressure gas or high-pressure liquid is introduced into the circulation channel, at least two pistons are alternately pushed to slide back and forth to drive the crankshaft to rotate; the magnetic shell has a magnetic field inside and is fixed on the outer wall of the main body; one end of the crankshaft rotates out of the main body and extends into the magnetic shell; the conductor is located in the magnetic shell and fixed at the protruding end of the crankshaft, so as to rotate and cut the magnetic flux lines of the magnetic field as the crankshaft rotates to generate current.

[0008] The beneficial effects of the present invention are as follows: the structure of the traditional pressure reducing valve is improved, the crankshaft is first rotatably connected in the containing groove, and then at least two pistons in at least two sliding holes are hinged to at least two journals on the crankshaft through piston rods. Since the circulation channels are connected to the at least two sliding holes, and since the bottom ends of at least two pistons are fixed with baffles that can close the circulation channels, the high-pressure gas or high-pressure liquid in the circulation channel can be used to alternately push the at least two pistons to slide back and forth, thereby driving the crankshaft to rotate, and the conductor is linked to cut the magnetic flux lines of the magnetic field inside the magnetic shell, completing the conversion of liquid kinetic energy or gas kinetic energy into electrical energy, reducing the pressure of the high-pressure gas or high-pressure liquid, reducing the working pressure inside the pressure reducing valve, and extending the service life of the pressure reducing valve.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the main body includes a valve body and a valve cover, and the two opposite side surfaces of the valve body are respectively provided with a gas-liquid inlet groove and a gas-liquid outlet groove, and the top surface thereof is provided with a first through groove communicating with the gas-liquid inlet groove and a second through groove communicating with the gas-liquid outlet groove; the bottom end of the valve cover is detachably connected to the top end of the valve body, and the bottom surface thereof is provided with a flow groove communicating with the first through groove and the second through groove; the flow channel is the gas-liquid inlet groove, the first through groove, the flow groove, the second through groove and the gas-liquid outlet groove connected in sequence; the containing groove is arranged at the top end of the valve cover; the inlet is the slot of the gas-liquid inlet groove; the outlet is the slot of the gas-liquid outlet groove; at least two of the sliding holes are arranged inside the valve cover and are located between the first through groove and the second through groove; the magnetic shell is fixed to the outer wall of the valve cover; one end of the crankshaft rotates and extends out of the valve cover.

[0011] Furthermore, the magnetic shell includes a cylinder, an N-grade magnet and an S-grade magnet. The cylinder is sleeved on the outer peripheral side of the extended end of the crankshaft and fixed to the outer wall of the valve cover; the N-grade magnet and the S-grade magnet are relatively fixed on the inner wall of the cylinder.

[0012] A further beneficial effect of the above method is that a magnetic field can be continuously generated inside the cylinder by fixing the N-grade magnet and the S-grade magnet relatively to the inner cylinder wall of the cylinder.

[0013] Furthermore, the conductor includes a magnetic flux cutting rod, an N-level coil, an S-level coil, an N-level magnetic brush and an S-level magnetic brush. The magnetic flux cutting rod is located in the cylinder and fixed on the protruding end of the crankshaft; the N-level coil and the S-level coil are wound around the magnetic flux cutting rod at intervals; the N-level magnetic brush is fixed on the inner wall of the cylinder and in sliding contact with the N-level coil, and the S-level magnetic brush is fixed on the inner wall of the cylinder and in sliding contact with the S-level coil to conduct the current on the N-level coil and the S-level coil.

[0014] A further beneficial effect of the above method is: first, the N-level magnetic brush is used to slide in contact with the N-level coil, and then the S-level magnetic brush is used to slide in contact with the S-level coil, so that the current on the N-level coil and the S-level coil can be transmitted to the N-level magnetic brush and the S-level magnetic brush, thereby completing the wireless transmission of current.

[0015] Furthermore, it also includes a battery holder and a battery, wherein the battery holder is fixed to the top of the valve cover and is provided with a fixing groove; the battery is embedded in the fixing groove and is electrically connected to the N-level magnetic brush and the S-level magnetic brush through a power line.

[0016] Further, it also includes a pressure reducing seat, the top of the valve body is provided with a mounting groove, the mounting groove is located on one side of the first through groove and communicated with the circulation groove, the groove bottom of the mounting groove is provided with a third through groove () which is connected with the gas-liquid inlet groove, and the second through groove is arranged at the groove bottom of the mounting groove; the outer peripheral side wall of the pressure reducing seat is fixed on the inner peripheral groove wall of the mounting groove and is provided with a pressure relief hole which is connected with the circulation groove and the second through groove, a plurality of first pressure reducing grooves which are all connected with the third through groove () are provided on it, a plurality of second pressure reducing grooves which are all connected with the second through groove are provided on it, a transfer cavity which is connected with the plurality of first pressure reducing grooves and the plurality of second pressure reducing grooves is provided inside it, and the plurality of first pressure reducing grooves and the plurality of second pressure reducing grooves are arranged in a staggered manner so that high-pressure gas or high-pressure liquid can offset each other and reduce the pressure of the high-pressure gas or high-pressure liquid; the circulation channel is the gas-liquid inlet groove, the first through groove, the circulation groove, the pressure relief hole, the mounting groove, the second through groove and the gas-liquid outlet groove which are connected in sequence; at least two of the sliding holes are located between the first through groove and the pressure relief hole.

[0017] The further beneficial effects of adopting the above are:

[0018] 1. A third through groove is opened inside the valve body. Since the third through groove is connected with the gas-liquid inlet groove, a gas-liquid flow path in parallel with the first through groove can be formed to prevent the gas-liquid flow path of the pressure reducing valve from being interrupted, thereby providing continuous pressure reducing gas or pressure reducing liquid for subsequent equipment;

[0019] 2. The throttle seat is fixed in the mounting groove. Since the throttle seat is provided with a plurality of first pressure reducing grooves all connected with the third through groove, a plurality of second pressure reducing grooves all connected with the second through groove, and a transfer cavity connected with the plurality of first pressure reducing grooves and the plurality of second pressure reducing grooves, and since the plurality of first pressure reducing grooves and the plurality of second pressure reducing grooves are arranged in a staggered manner, the high-pressure gas or high-pressure liquid flowing into the plurality of first pressure reducing grooves, the transfer cavity and the plurality of second pressure reducing grooves can be offset to reduce the pressure of the high-pressure gas or high-pressure liquid;

[0020] 3. The high-pressure gas or high-pressure liquid flowing in the circulation groove pushes at least two pistons upward in sequence, and then is discharged through the pressure relief hole, the installation groove, the second through groove and the gas-liquid outlet groove.

[0021] Furthermore, the pressure relief seat comprises a closing plate and a pressure relief strip plate, the outer peripheral side wall of the closing plate is fixed on the inner peripheral groove wall of the mounting groove and the bottom surface thereof is separated from the bottom of the mounting groove by a predetermined distance, and the pressure relief hole is arranged on the closing plate; the top surface of the pressure relief strip plate is fixed on the bottom surface of the closing plate corresponding to the third through groove () and the second through groove, the bottom surface of the pressure relief strip plate is in sealing contact with the groove bottom of the mounting groove and the two end surfaces thereof are respectively in sealing contact with the two inner groove walls of the mounting groove, a plurality of the first pressure relief grooves are arranged on the side surface of the pressure relief strip plate close to the third through groove (), a plurality of the second pressure relief grooves are arranged on the side surface of the pressure relief strip plate close to the second through groove, and the transfer chamber is arranged inside the pressure relief strip plate.

[0022] Furthermore, it also includes a valve seat, a valve stem and a valve core, the outer peripheral side wall of the valve seat is fixed on the inner peripheral groove wall of the second through groove and is provided with a valve hole; the groove bottom of the second through groove is provided with a guide blind hole and the bottom of the guide blind hole is fixed with a spring; the valve stem slides in the guide blind hole and its bottom end presses on the spring; the valve core is fixed on the top end of the valve stem and can extend into the valve hole as the valve stem slides.

[0023] A further beneficial effect of the above is that the high-pressure gas or high-pressure liquid flowing into the second through groove pushes the valve core and the valve stem downward, which can open the valve hole, connect the second through groove and the gas-liquid outlet groove, and reduce the pressure of the high-pressure liquid or high-pressure gas again.

[0024] Furthermore, the outer peripheral side wall of the valve core is in sliding and sealing contact with the inner peripheral side wall of the second through groove, and a plurality of gas-liquid through holes are provided on the outer peripheral side of the valve core corresponding to the valve hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the internal structure of a pressure reducing valve with energy recovery function of the present invention, which pushes a piston to move upward;

[0026] Figure 2 A schematic diagram of the internal structure of a pressure reducing valve with energy recovery function according to the present invention, which pushes another piston to move upward;

[0027] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of a pressure reducing seat in a pressure reducing valve with energy recovery function.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Main body, 11. Circulation channel, 12. Receiving groove, 13. Sliding hole, 14. Valve body, 141. Gas-liquid inlet groove, 142. Gas-liquid outlet groove, 143. First through groove, 144. Second through groove, 1441. Guide blind hole, 145. Mounting groove, 146. Third through groove, 15. Valve cover, 151. Circulation groove, 2. Crankshaft, 21. Journal, 3. Piston, 4. Magnetic shell, 41. Cylinder, 42. N-grade magnet, 43. S-grade magnet, 5. Conductor, 51. Magnetic flux cutting rod, 52. N-level coil, 53. S-level coil, 54. N-level magnetic brush, 55. S-level magnetic brush, 6. Piston rod, 7. Baffle, 8. Battery holder, 9. Battery, 10. Pressure relief seat, 101. Closing plate, 1011. Pressure relief hole, 102. Pressure relief strip, 1021. First pressure relief groove, 1022. Second pressure relief groove, 1023. Transfer chamber, 16. Valve seat, 17. Valve stem, 18. Valve core. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] like Figure 1 and Figure 2 As shown, a pressure reducing valve with energy recovery function includes a main body 1, the interior of the main body 1 is provided with a flow channel 11 connecting the inlet and the outlet on both sides, and also includes: a crankshaft 2, a piston 3, a magnetic shell 4 and a conductor 5.

[0032] A groove 12 is provided at the top of the main body 1; the crankshaft 2 is placed in the groove 12 and its two ends are rotatably connected to the two opposite inner groove walls of the groove 12 with the height direction of the main body 1 as the axis, and the crankshaft 2 has at least two journals 21 arranged at intervals in the axial direction, and at least two journals 21 are distributed on both sides of the crankshaft 2; at least two sliding holes 13 are provided at the bottom of the groove 12, both of which are connected to the flow channel 11; there are at least two pistons 3, which are sealed and slide in at least two sliding holes 13 respectively, and the tops of at least two pistons 3 are hinged with piston rods 6 and their bottoms are A baffle 7 is fixed to close the circulation channel 11, and the top ends of at least two piston rods 6 are respectively hinged on at least two journals 21, so that after high-pressure gas or high-pressure liquid is introduced into the circulation channel 11, at least two pistons 3 are alternately pushed to slide back and forth, thereby driving the crankshaft 2 to rotate; the magnetic shell 4 has a magnetic field inside and is fixed on the outer wall of the main body 1; one end of the crankshaft 2 rotates to extend out of the main body 1 and into the magnetic shell 4; the conductor 5 is located in the magnetic shell 4 and is fixed to the protruding end of the crankshaft 2, so that it rotates with the rotation of the crankshaft 2 to cut the magnetic flux lines of the magnetic field and generate current.

[0033] like Figure 1 and Figure 2As shown, in some specific embodiments, the main body 1 includes a valve body 14 and a valve cover 15, and the two opposite sides of the valve body 14 are respectively provided with a gas-liquid inlet groove 141 and a gas-liquid outlet groove 142, and the top surface thereof is provided with a first through groove 143 communicating with the gas-liquid inlet groove 141 and a second through groove 144 communicating with the gas-liquid outlet groove 142; the bottom end of the valve cover 15 is detachably connected to the top end of the valve body 14, and the bottom surface thereof is provided with a flow groove 151 communicating with the first through groove 143 and the second through groove 144; the flow channel 1 1 is a gas-liquid inlet groove 141, a first through groove 143, a circulation groove 151, a second through groove 144 and a gas-liquid outlet groove 142 which are connected in sequence; the containing groove 12 is arranged at the top of the valve cover 15; the inlet is the notch of the gas-liquid inlet groove 141; the outlet is the notch of the gas-liquid outlet groove 142; at least two sliding holes 13 are arranged inside the valve cover 15 and are located between the first through groove 143 and the second through groove 144; the magnetic shell 4 is fixed on the outer side wall of the valve cover 15; one end of the crankshaft 2 rotates and extends out of the valve cover 15.

[0034] like Figure 1 and Figure 2 As shown, in some specific embodiments, the magnetic shell 4 may include a cylinder 41, an N-grade magnet 42 and an S-grade magnet 43. The cylinder 41 is sleeved on the outer peripheral side of the protruding end of the crankshaft 2 and fixed to the outer wall of the valve cover 15; the N-grade magnet 42 and the S-grade magnet 43 are relatively fixed on the inner cylinder wall of the cylinder 41.

[0035] like Figure 1 and Figure 2 As shown, in some specific embodiments, the conductor 5 may include a magnetic flux cutting rod 51, an N-level coil 52, an S-level coil 53, an N-level magnetic brush 54 and an S-level magnetic brush 55. The magnetic flux cutting rod 51 is located in the cylinder 41 and fixed to the protruding end of the crankshaft 2; the N-level coil 52 and the S-level coil 53 are wound around the magnetic flux cutting rod 51 at intervals; the N-level magnetic brush 54 is fixed on the inner cylinder wall of the cylinder 41 and is in sliding contact with the N-level coil 52, and the S-level magnetic brush 55 is fixed on the inner cylinder wall of the cylinder 41 and is in sliding contact with the S-level coil 53 to conduct the current on the N-level coil 52 and the S-level coil 53.

[0036] like Figure 1 and Figure 2 As shown, in some specific embodiments, a battery holder 8 and a battery 9 may also be included. The battery holder 8 is fixed to the top of the valve cover 15 and is provided with a fixing groove thereon; the battery 9 is embedded in the fixing groove and is electrically connected to the N-level magnetic brush 54 and the S-level magnetic brush 55 through a power line.

[0037] like Figure 3As shown, in some specific embodiments, a pressure relief seat 10 may also be included, a mounting groove 145 is provided at the top of the valve body 14, the mounting groove 145 is located on one side of the first through groove 143 and communicated with the circulation groove 151, a third through groove 146 communicating with the gas-liquid inlet groove 141 is provided at the bottom of the mounting groove 145, and a second through groove 144 is provided at the bottom of the mounting groove 145; the outer peripheral side wall of the pressure relief seat 10 is fixed to the inner peripheral groove wall of the mounting groove 145 and is provided with a pressure relief hole 1011 communicating with the circulation groove 151 and the second through groove 144, a plurality of first pressure relief grooves 1021 each communicating with the third through groove 146 are provided thereon, and a plurality of first pressure relief grooves 1021 each communicating with the third through groove 146 are provided thereon The second pressure reducing groove 1022 communicates with the two through grooves 144, and a transfer cavity 1023 is provided inside the second pressure reducing groove 1022 which is communicated with the plurality of first pressure reducing grooves 1021 and the plurality of second pressure reducing grooves 1022. The plurality of first pressure reducing grooves 1021 and the plurality of second pressure reducing grooves 1022 are staggered so that the high-pressure gas or the high-pressure liquid can offset each other and reduce the pressure of the high-pressure gas or the high-pressure liquid. The circulation channel 11 is a gas-liquid inlet groove 141, a first through groove 143, a circulation groove 151, a pressure relief hole 1011, an installation groove 145, a second through groove 144 and a gas-liquid outlet groove 142 which are connected in sequence. At least two sliding holes 13 are located between the first through groove 143 and the pressure relief hole 1011.

[0038] like Figure 3 As shown, in some specific embodiments, the decompression seat 10 may include a closing plate 101 and a decompression strip plate 102, the outer peripheral side wall of the closing plate 101 is fixed on the inner peripheral groove wall of the mounting groove 145 and its bottom surface is separated from the bottom of the mounting groove 145 by a predetermined distance, and the pressure relief hole 1011 is provided on the closing plate 101; the top surface of the decompression strip plate 102 is fixed to the bottom surface of the closing plate 101 between the third through groove 146 and the second through groove 144, the bottom surface of the decompression strip plate 102 is in sealing contact with the groove bottom of the mounting groove 145 and its two end surfaces are respectively in sealing contact with the two inner groove walls of the mounting groove 145, a plurality of first decompression grooves 1021 are provided on the side of the decompression strip plate 102 close to the third through groove 146, a plurality of second decompression grooves 1022 are provided on the side of the decompression strip plate 102 close to the second through groove 144, and the transfer chamber 1023 is provided inside the decompression strip plate 102.

[0039] like Figure 1 and Figure 2 As shown, in some specific embodiments, a valve seat 16, a valve stem 17 and a valve core 18 may also be included, wherein the outer peripheral side wall of the valve seat 16 is fixed on the inner peripheral groove wall of the second through groove 144 and a valve hole is provided thereon; a guide blind hole 1441 is provided at the bottom of the second through groove 144 and a spring is fixed at the bottom of the guide blind hole 1441; the valve stem 17 slides in the guide blind hole 1441 and its bottom end is pressed against the spring; the valve core 18 is fixed to the top end of the valve stem 17 and can extend into the valve hole as the valve stem 17 slides.

[0040] In some specific embodiments, the outer peripheral side wall of the valve core 18 is in sliding and sealing contact with the inner peripheral side wall of the second through groove 144, and a plurality of gas-liquid through holes are provided on the outer peripheral side of the valve core 18 corresponding to the valve hole.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure reducing valve with energy recovery function, comprising a main body (1), wherein a flow channel (11) is provided inside the main body (1) for connecting an inlet and an outlet on both sides, characterized in that: Also includes: A crankshaft (2), wherein a groove (12) is provided at the top of the main body (1); the crankshaft (2) is placed in the groove (12) and its two ends are rotatably connected to two opposite inner groove walls of the groove (12) with an axis perpendicular to the height direction of the main body (1); the crankshaft (2) has at least two journals (21) arranged at intervals in the axial direction, and at least two of the journals (21) are distributed on both sides of the crankshaft (2); A piston (3), wherein the bottom of the containing groove (12) is provided with at least two sliding holes (13) both connected to the circulation channel (11); the pistons (3) are at least two and are respectively and sealedly slid in the at least two sliding holes (13); the top ends of at least two of the pistons (3) are respectively hinged with piston rods (6) and the bottom ends thereof are respectively fixed with baffles (7) capable of closing the circulation channel (11); the top ends of at least two of the piston rods (6) are respectively and correspondingly hinged on at least two of the journals (21), so that after high-pressure gas or high-pressure liquid is introduced into the circulation channel (11), the at least two pistons (3) are alternately pushed to slide back and forth, thereby driving the crankshaft (2) to rotate; A magnetic shell (4), wherein the magnetic shell (4) has a magnetic field inside and is fixed on the outer wall of the main body (1); one end of the crankshaft (2) rotates to extend out of the main body (1) and into the magnetic shell (4); A conductor (5) is located in the magnetic shell (4) and is fixed to the protruding end of the crankshaft (2) so as to rotate with the rotation of the crankshaft (2) to cut the magnetic flux lines of the magnetic field and generate current.

2. A pressure reducing valve with energy recovery function according to claim 1, characterized in that: The main body (1) comprises a valve body (14) and a valve cover (15); two opposite side surfaces of the valve body (14) are respectively provided with a gas-liquid inlet groove (141) and a gas-liquid outlet groove (142); and a top surface thereof is provided with a first through groove (143) communicating with the gas-liquid inlet groove (141) and a second through groove (144) communicating with the gas-liquid outlet groove (142); the bottom end of the valve cover (15) is detachably connected to the top end of the valve body (14) and a flow groove (151) communicating with the first through groove (143) and the second through groove (144) is provided on its bottom surface; the flow channel (11) is connected to the gas-liquid inlet groove (141) and the second through groove (144) in sequence. , the first through groove (143), the circulation groove (151), the second through groove (144) and the gas-liquid outlet groove (142); the containing groove (12) is arranged at the top of the valve cover (15); the inlet is the groove of the gas-liquid inlet groove (141); the outlet is the groove of the gas-liquid outlet groove (142); at least two of the sliding holes (13) are arranged inside the valve cover (15) and are located between the first through groove (143) and the second through groove (144); the magnetic shell (4) is fixed on the outer wall of the valve cover (15); one end of the crankshaft (2) rotates and extends out of the valve cover (15).

3. A pressure reducing valve with energy recovery function according to claim 2, characterized in that: The magnetic shell (4) comprises a cylinder (41), an N-grade magnet (42) and an S-grade magnet (43); the cylinder (41) is sleeved on the outer peripheral side of the protruding end of the crankshaft (2) and fixed to the outer side wall of the valve cover (15); the N-grade magnet (42) and the S-grade magnet (43) are relatively fixed on the inner cylinder wall of the cylinder (41).

4. The pressure reducing valve with energy recovery function according to claim 3, characterized in that: The conductor (5) comprises a magnetic flux cutting rod (51), an N-level coil (52), an S-level coil (53), an N-level magnetic brush (54) and an S-level magnetic brush (55); the magnetic flux cutting rod (51) is located in the cylinder (41) and fixed to the protruding end of the crankshaft (2); the N-level coil (52) and the S-level coil (53) are wound around the magnetic flux cutting rod (51) at intervals; the N-level magnetic brush (54) is fixed on the inner cylinder wall of the cylinder (41) and is in sliding contact with the N-level coil (52); the S-level magnetic brush (55) is fixed on the inner cylinder wall of the cylinder (41) and is in sliding contact with the S-level coil (53) to conduct current on the N-level coil (52) and the S-level coil (53).

5. The pressure reducing valve with energy recovery function according to claim 4, characterized in that: It also includes a battery holder (8) and a battery (9), wherein the battery holder (8) is fixed to the top of the valve cover (15) and is provided with a fixing groove; the battery (9) is embedded in the fixing groove and is electrically connected to the N-level magnetic brush (54) and the S-level magnetic brush (55) through a power line.

6. The pressure reducing valve with energy recovery function according to claim 2, characterized in that: It also includes a pressure reducing seat (10), the top end of the valve body (14) is provided with a mounting groove (145), the mounting groove (145) is located on one side of the first through groove (143) and is communicated with the circulation groove (151), the bottom of the mounting groove (145) is provided with a third through groove (146) which is communicated with the gas-liquid inlet groove (141), and the second through groove (144) is provided at the bottom of the mounting groove (145); the outer peripheral side wall of the pressure reducing seat (10) is fixed to the inner peripheral groove wall of the mounting groove (145) and is provided with a pressure relief hole (1011) which is communicated with the circulation groove (151) and the second through groove (144), a plurality of first pressure reducing grooves (1021) which are all communicated with the third through groove (146), and a plurality of first pressure reducing grooves (1021) which are all communicated with the second through groove (144) are provided. A second pressure reducing groove (1022) is connected to the plurality of first pressure reducing grooves (1021) and the plurality of second pressure reducing grooves (1022), and a transfer cavity (1023) is provided inside the second pressure reducing grooves (1022) and the plurality of first pressure reducing grooves (1021) and the plurality of second pressure reducing grooves (1022) are staggeredly arranged so that high-pressure gas or high-pressure liquid can counteract each other and reduce the pressure of the high-pressure gas or high-pressure liquid; the circulation channel (11) is the gas-liquid inlet groove (141), the first through groove (143), the circulation groove (151), the pressure relief hole (1011), the installation groove (145), the second through groove (144) and the gas-liquid outlet groove (142) which are connected in sequence; at least two of the sliding holes (13) are located between the first through groove (143) and the pressure relief hole (1011).

7. The pressure reducing valve with energy recovery function according to claim 6, characterized in that: The decompression seat (10) comprises a closing plate (101) and a decompression strip plate (102); the outer peripheral side wall of the closing plate (101) is fixed to the inner peripheral groove wall of the mounting groove (145) and the bottom surface thereof is separated from the groove bottom of the mounting groove (145) by a predetermined distance; the pressure relief hole (1011) is arranged on the closing plate (101); the top surface of the decompression strip plate (102) is fixed to the bottom surface of the closing plate (101) corresponding to the third through groove (146) and the second through groove (144); The bottom surface of the plate (102) is in sealing contact with the bottom of the mounting groove (145), and its two end surfaces are respectively in sealing contact with the two inner groove walls of the mounting groove (145); a plurality of the first pressure-reducing grooves (1021) are arranged on the side of the pressure-reducing strip plate (102) close to the third through groove (146); a plurality of the second pressure-reducing grooves (1022) are arranged on the side of the pressure-reducing strip plate (102) close to the second through groove (144); and the transfer chamber (1023) is arranged inside the pressure-reducing strip plate (102).

8. The pressure reducing valve with energy recovery function according to claim 2, characterized in that: It also includes a valve seat (16), a valve stem (17) and a valve core (18); the outer peripheral side wall of the valve seat (16) is fixed on the inner peripheral groove wall of the second through groove (144) and is provided with a valve hole; the groove bottom of the second through groove (144) is provided with a guide blind hole (1441) and the bottom of the guide blind hole (1441) is fixed with a spring; the valve stem (17) slides in the guide blind hole (1441) and its bottom end presses against the spring; the valve core (18) is fixed to the top end of the valve stem (17) and can extend into the valve hole as the valve stem (17) slides.

9. The pressure reducing valve with energy recovery function according to claim 8, characterized in that: The outer peripheral side wall of the valve core (18) is in sliding and sealing contact with the inner peripheral side wall of the second through groove (144), and a plurality of gas-liquid through holes are provided on the outer peripheral side of the valve core (18) corresponding to the valve hole.

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