A proportional valve

Abstract

The present application relates to a proportional valve, including a main body seat, a base, a coil, a valve core, a push rod, a sealing sheet, a steel ball seat, a steel ball and a valve spring, wherein the main body seat forms a valve cavity, the valve core is slidably arranged in the valve cavity, and the push rod is coaxially penetrated and fixed on the valve core; the base is clamped at the bottom end of the outer cover, and a connecting channel is provided in the base, and the bottom end of the push rod enters the connecting channel, and an inlet and an outlet are provided on the base, and the steel ball seat is installed at the inlet, and the steel ball is movably arranged between the push rod and the steel ball seat; a mounting ring is coaxially provided at the upper end of the steel ball seat, and a plurality of elastic arc rods are circumferentially provided on the mounting ring, and the plurality of elastic arc rods surround the steel ball; when the base is removed from the outer cover, the steel ball cannot pass through the gap formed by the top ends of the plurality of elastic arc rods and the gap between adjacent elastic arc rods. Regardless of the state of the base, the plurality of elastic arc rods always surround the steel ball, and the steel ball will not separate alone, which can improve the situation that the steel ball is easily lost after the base is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, in particular to a proportional valve. Background Art

[0002] A proportional valve is a valve that converts an input electrical signal into force or displacement in proportion, thereby continuously controlling parameters such as pressure and flow. A variable flow solenoid valve is a type of proportional valve.

[0003] Normally closed variable flow solenoid valves of related technology such as Figure 1 As shown, it includes a main body seat 1 and a base 2 detachably connected to the bottom of the main body seat 1, a sealing sheet 34 is provided between the main body seat 1 and the base 2, a connecting channel 21 is provided on the base 2, an inlet 22 and an outlet 23 connected to the connecting channel 21 are provided on the base 2, a valve core 32 is slidably provided in the main body seat 1, a push rod 33 is coaxially fixed on the valve core 32, a coil 31 is provided on the main body seat 1, and a valve spring 37 is also provided in the main body seat 1 for abutting the valve core 32, a steel ball seat 35 is provided at the inlet 22, and a movable steel ball 36 is provided between the push rod 33 and the steel ball seat 35.

[0004] When the coil 31 is not energized, the valve spring 37 drives the valve core 32 and the push rod 33 to move downward, and the push rod 33 drives the steel ball 36 to abut against the steel ball seat 35, blocking the oil passage, and the oil from the inlet 22 cannot flow into the outlet 23; after the coil 31 is energized, as the current of the coil 31 increases, the electromagnetic force pushes the push rod 33 upward, and the oil pressure pushes the steel ball 36 open, and the oil flows smoothly into the outlet 23.

[0005] When the above-mentioned solenoid valve is inspected and repaired, the base and the main body need to be disassembled. After the disassembly, the steel balls are not restricted, which may easily cause the loss of the steel balls. Summary of the invention

[0006] In order to improve the situation where the steel ball is easily lost after the base and the main body are disassembled, the present application provides a proportional valve.

[0007] The proportional valve provided in this application adopts the following technical solution: A proportional valve, comprising a main body seat, a base, a coil, a valve core, a push rod, a sealing sheet, a steel ball seat, a steel ball and a valve spring, wherein the main body seat comprises an outer cover, an upper yoke sleeve and a lower yoke sleeve, wherein the upper yoke sleeve and the lower yoke sleeve are respectively mounted at the upper and lower ends of the outer cover, a valve cavity is formed between the upper yoke sleeve and the lower yoke sleeve, the valve core is slidably arranged in the valve cavity, the push rod is coaxially penetrated and fixed on the valve core, the valve spring is arranged in the valve cavity and used for driving the valve core to move downward, the coil is arranged in the outer cover and wound on the upper yoke sleeve and the lower yoke sleeve, and the coil surrounds the valve core; The base is clamped at the bottom end of the outer cover, the sealing sheet is arranged between the base and the lower yoke sleeve, a communication channel is provided in the base, a through hole is provided at the center of the sealing sheet, the push rod passes through the through hole and enters the communication channel, an inlet and an outlet connected to the communication channel are provided on the base, a step groove is provided on the inlet, the steel ball seat is installed in the step groove, and the steel ball is movably arranged between the push rod and the steel ball seat; A mounting ring is coaxially provided at the upper end of the steel ball seat, and a plurality of elastic arc rods are evenly provided on the mounting ring along the circumferential direction. The top ends of the elastic arc rods are bent outward, and the plurality of elastic arc rods surround the steel balls. When the base is installed on the outer cover, the top ends of the plurality of elastic arc rods abut against the outer wall of the top rod; when the base is removed from the outer cover, the steel balls cannot pass through the gaps formed by the top ends of the plurality of elastic arc rods and the gaps between adjacent elastic arc rods.

[0008] By adopting the above technical solution, after the base is disassembled, the push rod will be separated from the elastic arc rod, and after the elastic arc rods recover their deformation, a cage will be formed, which always surrounds the steel balls. No matter what state the base is in, the steel balls will not be separated individually, which can improve the situation where the steel balls are easily lost after the base is disassembled; after the base is installed, the push rod abuts against the outer folding part of the elastic arc rod, and the outer folding part plays a guiding role. The push rod drives the top end of the elastic arc rod to open, and at this time, there is enough space for the steel balls to move between the elastic arc rods.

[0009] Preferably, it also includes a filter assembly, which includes a filter screen, a ring frame and two mounting blocks, the two mounting blocks are fixedly arranged on both sides of the ring frame, the filter screen is arranged on the ring frame, and two mounting grooves matching the two mounting blocks are opened on the bottom surface of the step groove. The filter screen is located at the inlet, and the filter screen is located below the steel ball seat, and is used to filter the oil entering the connecting channel.

[0010] Preferably, the filter assembly further includes a driving member and two brush holders, and slide grooves are respectively provided on the side surfaces of the two mounting blocks facing each other, and the slide grooves are located below the ring frame and the filter screen. The two brush holders correspond to the two slide grooves one by one, and one end of the brush holder slides in the corresponding slide groove in a rod shape, and the other end of the brush holder extends to the inlet and is provided with a number of bristles that abut the filter screen. The driving member drives the two brush holders to move back and forth when the inlet and the outlet are connected.

[0011] By adopting the above technical solution, the two brush holders are driven to move back and forth by the driving member 1, and the bristles on the brush holders can clean the mesh of the filter screen in time, thereby reducing the probability of the filter screen being blocked.

[0012] Preferably, the driving member 1 comprises two return springs, two connecting rods and two driving rods, the two return springs are respectively located in two slide grooves, and the two ends of the return spring are respectively arranged on the end wall of the slide groove and the end surface of the brush holder; The two connecting rods are fixedly arranged on the two brush holders respectively, the mounting block is provided with a first groove for the connecting rods to slide, the steel ball seat is provided with a second groove for the two connecting rods to slide, and the two return springs respectively drive the two brush holders to move towards the sides away from each other; The mounting ring is rotatably connected to the upper end of the steel ball seat, the driving rod is fixedly arranged below the mounting ring, a first annular groove for the two driving rods to rotate is provided in the steel ball seat, the top end of the second groove is connected to the first annular groove, an inclined surface matching the driving rod is provided on the connecting rod, the top end of the connecting rod is located on the movable path of the driving rod, and when the mounting ring rotates, the driving rod abuts against the inclined surface to drive the connecting rod to move toward one side of the axis of the steel ball seat; The elastic arc rod is provided with blades. When the oil flows from the inlet to the outlet, the blades are driven by the oil and the mounting ring rotates.

[0013] By adopting the above technical solution, when the oil flows from the inlet to the outlet, the blades are driven by the oil and the mounting ring rotates. The rotation of the mounting ring drives the driving rod to rotate circumferentially in the first ring groove. The driving rod will abut against the inclined surface, and the driving connecting rod will overcome the elastic force of the reset spring and move toward the side of the axis of the steel ball seat. At this time, the connecting rod will drive the brush holder to move to clean the filter. When the driving rod rotates to leave the connecting rod, the connecting rod moves and resets toward the side away from the axis of the steel ball seat under the action of the reset spring, thereby realizing the back and forth movement of the brush holder.

[0014] Preferably, the push rod includes a main rod, a rotating block and a resist block, the main rod is coaxially penetrated and fixed on the valve core, the rotating block is coaxially rotatably connected to the bottom end of the main rod, the resist block is coaxially rotatably connected to the bottom end of the rotating block, the rotating block and the resist block are always located below the sealing plate, the resist block is used to abut against the steel ball, and the top end of the elastic arc rod is always abutted against the rotating block.

[0015] By adopting the above technical solution, the top end of the elastic arc rod can abut against the rotating block. When the mounting ring and a number of elastic arc rods rotate, the rotating block can be driven to rotate synchronously. Compared with the elastic arc rod directly abutting against the outer wall of the top rod, the friction force can be reduced, making the mounting ring easier to drive; at the same time, when the oil pressure drives the steel ball to move up and abut against the resistance block, due to the mutual rotation between the resistance block and the rotating block, the friction between the steel ball and the resistance block can keep the steel ball and the resistance block in a relatively static state, so that the resistance block hardly causes wear on the steel ball.

[0016] Preferably, the main body seat also includes an upper guide sleeve and a lower guide sleeve, the upper guide sleeve is arranged in the upper yoke sleeve, and the lower guide sleeve is arranged in the lower yoke sleeve, the upper guide sleeve and the lower guide sleeve are respectively located on the upper and lower sides of the valve core, and the upper guide sleeve and the lower guide sleeve are respectively coaxially provided with through holes, the through hole of the upper guide sleeve is directly connected to the outside, and the upper and lower ends of the main rod slide on the two through holes respectively.

[0017] By adopting the above technical solution, the arrangement of the upper guide sleeve and the lower guide sleeve improves the sliding stability of the main rod and improves the stability of the force applied to the steel ball.

[0018] Preferably, it also includes a schematic component for displaying the blocking status of the filter screen, the schematic component includes a synchronous rotating rod and an indicator head, the synchronous rotating rod is coaxially rotatably connected to the top rod, the bottom end of the synchronous rotating rod is fixedly set on the rotating block, the top end of the synchronous rotating rod extends to the top of the main rod, the middle part of the indicator head is fixedly set on the top end of the synchronous rotating rod, and the indicator head is always located in the through hole.

[0019] By adopting the above technical solution, since the filter assembly is inside the base, maintenance personnel cannot directly observe the blockage condition of the filter. By setting a synchronous rotating rod and an indicating head, the elastic arc rod drives the rotating block to rotate, the rotating block drives the synchronous rotating rod to rotate, and the synchronous rotating rod drives the indicating head to rotate. Maintenance personnel can observe the rotation of the indicating head in the through hole on the outside of the proportional valve, thereby being able to determine the blockage condition of the filter at this time.

[0020] The technical effects of the present invention are mainly reflected in the following aspects: 1. The present invention provides an elastic arc rod, so that the steel ball will not separate independently regardless of the state of the base, thereby improving the situation that the steel ball is easily lost after the base is disassembled; 2. The present invention drives two brush holders to move back and forth through a driving member 1, and the bristles on the brush holders can clean the mesh of the filter in time, thereby reducing the probability of the filter being blocked; 3. The present invention uses a schematic component, sets a synchronous rotating rod and an indicating head, drives the rotating block to rotate through the elastic arc rod, drives the synchronous rotating rod to rotate, and drives the indicating head to rotate through the synchronous rotating rod. Maintenance personnel can observe the rotation of the indicating head in the through hole outside the proportional valve, thereby being able to determine the blocking condition of the filter at this time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of a solenoid valve in the related art.

[0022] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0023] Figure 3 is along Figure 2 Section view along line AA.

[0024] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0025] Figure 5 It is a schematic diagram of the structure of the base of the embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of the structure of the filter assembly of the embodiment of the present application.

[0027] Figure 7 yes Figure 3 Enlarged view of point C in the middle.

[0028] Description of reference numerals: 1, main body seat; 11, outer cover; 12, upper yoke sleeve; 13, lower yoke sleeve; 14, upper guide sleeve; 15, lower guide sleeve; 16, through hole; 2, base; 21, connecting channel; 22, inlet; 23, outlet; 24, step groove; 25, installation groove; 31, coil; 32, valve core; 33, push rod; 331, main rod; 332, rotating block; 3321, groove; 333, stop block; 34, sealing sheet; 341, perforation; 35 , steel ball seat; 351, second groove; 352, first ring groove; 36, steel ball; 37, valve spring; 38, sealing ring; 4, filter assembly; 41, filter screen; 42, ring frame; 43, mounting block; 431, first groove; 432, slide groove; 44, return spring; 45, connecting rod; 46, driving rod; 47, brush holder; 48, bristles; 5, mounting ring; 51, elastic arc rod; 52, blade; 6, schematic component; 61, synchronous rotating rod; 62, indicator head. DETAILED DESCRIPTION

[0029] The following is combined with Figure 2-Figure 7 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0030] The embodiment of the present application discloses a proportional valve.

[0031] Reference Figure 2-Figure 4 A proportional valve of the present embodiment includes a main body seat 1, a base 2, a coil 31, a valve core 32, a push rod 33, a sealing sheet 34, a steel ball seat 35, a steel ball 36 and a valve spring 37. The main body seat 1 includes an outer cover 11, an upper yoke sleeve 12 and a lower yoke sleeve 13. The upper yoke sleeve 12 and the lower yoke sleeve 13 are respectively installed at the upper and lower ends of the outer cover 11. A valve cavity is formed between the upper yoke sleeve 12 and the lower yoke sleeve 13. The valve core 32 is slidably arranged in the valve cavity. The push rod 33 is coaxially penetrated and fixed on the valve core 32. The valve spring 37 is arranged in the valve cavity for driving the valve core 32 to move downward. The coil 31 is arranged in the outer cover 11 and is wound around the upper yoke sleeve 12 and the lower yoke sleeve 13. The coil 31 surrounds the valve core 32.

[0032] Reference Figure 2-Figure 4The base 2 is clamped at the bottom end of the outer cover 11. The base 2 can also be further fixed to the outer cover 11 using bolts and other connecting parts. The sealing sheet 34 is arranged between the base 2 and the lower yoke sleeve 13. The base 2 has a connecting passage 21. The sealing sheet 34 has a through hole 341 at the center. The push rod 33 passes through the through hole 341 and enters the connecting passage 21. The base 2 is provided with an inlet 22 and an outlet 23 connected to the connecting passage 21. The inlet 22 is provided with a step groove 24. The steel ball seat 35 is installed in the step groove 24. The steel ball 36 is movably arranged between the push rod 33 and the steel ball seat 35.

[0033] Reference Figure 3 and Figure 4 A mounting ring 5 is coaxially provided at the upper end of the steel ball seat 35, and a plurality of elastic arc rods 51 are evenly provided on the mounting ring 5 along the circumferential direction. The top ends of the elastic arc rods 51 are bent outward, and the plurality of elastic arc rods 51 surround the steel ball 36. When the base 2 is installed on the outer cover 11, the top ends of the plurality of elastic arc rods 51 abut against the outer wall of the top rod 33; when the base 2 is removed from the outer cover 11, the steel ball 36 cannot pass through the gap formed by the top ends of the plurality of elastic arc rods 51 and the gap between adjacent elastic arc rods 51.

[0034] Reference Figure 2-Figure 4 When the coil 31 is not energized, the valve spring 37 drives the valve core 32 and the push rod 33 to move downward, and the push rod 33 drives the steel ball 36 to abut against the steel ball seat 35, blocking the oil passage, and the oil from the inlet 22 cannot flow into the outlet 23; after the coil 31 is energized, as the current of the coil 31 increases, the electromagnetic force pushes the push rod 33 upward, and the oil pressure pushes the steel ball 36 open, and the oil flows smoothly into the outlet 23.

[0035] Reference Figure 1 After the base 2 is disassembled, the top rod 33 will be separated from the elastic arc rod 51. After the elastic arc rods 51 recover their deformation, a cage will be formed to always surround the steel balls 36. No matter what state the base 2 is in, the steel balls 36 will not be separated individually, which can improve the situation where the steel balls 36 are easily lost after the base 2 is disassembled; after the base 2 is installed, the top rod 33 abuts against the outer folded part of the elastic arc rod 51, and the outer folded part plays a guiding role. The top rod 33 drives the top end of the elastic arc rod 51 to open. At this time, there is enough space for the steel balls 36 to move between the elastic arc rods 51.

[0036] Reference Figure 2-Figure 6 , and also includes a filter assembly 4, which includes a filter screen 41, a ring frame 42 and two mounting blocks 43. The two mounting blocks 43 are respectively fixed on both sides of the ring frame 42, and the filter screen 41 is arranged on the ring frame 42. Two mounting grooves 25 matching the two mounting blocks 43 are opened on the bottom surface of the step groove 24. The filter screen 41 is located at the inlet 22, and the filter screen 41 is located below the steel ball seat 35, and is used to filter the oil entering the connecting channel 21.

[0037] Reference Figure 2-Figure 6 The filter assembly 4 also includes a driving member 1 and two brush holders 47. The side surfaces of the two mounting blocks 43 facing each other are respectively provided with slide grooves 432. The slide grooves 432 are located below the ring frame 42 and the filter screen 41. The two brush holders 47 correspond to the two slide grooves 432 one by one. One end of the brush holder 47 slides in the corresponding slide groove 432 in a rod shape. The other end of the brush holder 47 extends to the inlet 22 and is provided with a plurality of bristles 48 abutting the filter screen 41. The driving member 1 drives the two brush holders 47 to move back and forth when the inlet 22 is connected to the outlet 23.

[0038] Reference Figure 2-Figure 6 The two brush holders 47 are driven to move back and forth by the driving member 1, and the bristles 48 on the brush holders 47 can clean the mesh of the filter screen 41 in time, thereby reducing the probability of the filter screen 41 being blocked.

[0039] Reference Figure 2-Figure 6 The driving member 1 includes two return springs 44, two connecting rods 45 and two driving rods 46. The two return springs 44 are respectively located in the two slide grooves 432, and the two ends of the return spring 44 are respectively arranged on the end wall of the slide groove 432 and the end surface of the brush holder 47.

[0040] Reference Figure 2-Figure 6 The two connecting rods 45 are fixedly arranged on the two brush holders 47 respectively, the mounting block 43 is provided with a first groove 431 for the connecting rod 45 to slide, the steel ball seat 35 is provided with a second groove 351 for the two connecting rods 45 to slide, and the two return springs 44 respectively drive the two brush holders 47 to move toward the side away from each other.

[0041] Reference Figure 2-Figure 6 The mounting ring 5 is rotatably connected to the upper end of the steel ball seat 35, and the driving rod 46 is fixedly arranged below the mounting ring 5. A first annular groove 352 for the two driving rods 46 to rotate is provided in the steel ball seat 35. The top end of the second groove 351 is connected to the first annular groove 352. An inclined surface matching the driving rod 46 is provided on the connecting rod 45. The top end of the connecting rod 45 is located on the movable path of the driving rod 46. When the mounting ring 5 rotates, the driving rod 46 abuts against the inclined surface to drive the connecting rod 45 to move toward the axis of the steel ball seat 35.

[0042] Reference Figure 2-Figure 6 The elastic arc rod 51 is provided with blades 52. When the oil flows from the inlet 22 to the outlet 23, the blades 52 are driven by the oil and the mounting ring 5 rotates. The blades 52 are all located at the inlet 22, and the shape of the blades 52 is determined according to the actual situation.

[0043] Reference Figure 2-Figure 6When the oil flows from the inlet 22 to the outlet 23, the blade 52 is driven by the oil, and the mounting ring 5 rotates. The rotation of the mounting ring 5 drives the driving rod 46 to rotate circumferentially in the first annular groove 352. The driving rod 46 will abut against the inclined surface, and the driving connecting rod 45 will overcome the elastic force of the reset spring 44 and move toward the axis of the steel ball seat 35. At this time, the connecting rod 45 will drive the brush holder 47 to move to clean the filter screen 41. When the driving rod 46 rotates to leave the connecting rod 45, the connecting rod 45 moves and resets toward the side away from the axis of the steel ball seat 35 under the action of the reset spring 44, thereby realizing the back and forth movement of the brush holder 47.

[0044] Reference Figure 3 and Figure 4 The push rod 33 includes a main rod 331, a rotating block 332 and a resisting block 333. The main rod 331 is coaxially penetrated and fixed on the valve core 32. The rotating block 332 is coaxially rotatably connected to the bottom end of the main rod 331. The resisting block 333 is coaxially rotatably connected to the bottom end of the rotating block 332. The rotating block 332 and the resisting block 333 are always located below the sealing sheet 34. The resisting block 333 is used to abut the steel ball 36. The top end of the elastic arc rod 51 is always abutted against the rotating block 332.

[0045] Reference Figure 3 and Figure 4 The top end of the elastic arc rod 51 can abut against the rotating block 332. When the mounting ring 5 and the plurality of elastic arc rods 51 rotate, the rotating block 332 can be driven to rotate synchronously. Compared with the elastic arc rod 51 directly abutting against the outer wall of the top rod 33, the friction force can be reduced, making the mounting ring 5 easier to drive; at the same time, when the oil pressure drives the steel ball 36 to move up and abut against the block 333, due to the mutual rotation between the block 333 and the rotating block 332, the friction force between the steel ball 36 and the block 333 can keep the steel ball 36 and the block 333 in a relatively static state, so that the block 333 hardly causes wear to the steel ball 36.

[0046] Reference Figure 3 The main body seat 1 further includes an upper guide sleeve 14 and a lower guide sleeve 15. The upper guide sleeve 14 is arranged in the upper yoke sleeve 12, and the lower guide sleeve 15 is arranged in the lower yoke sleeve 13. The upper guide sleeve 14 and the lower guide sleeve 15 are respectively located on the upper and lower sides of the valve core 32. The upper guide sleeve 14 and the lower guide sleeve 15 are respectively coaxially provided with through holes 16. The through holes 16 of the upper guide sleeve 14 are opened and directly communicated with the outside world. The upper and lower ends of the main rod 331 slide on the two through holes 16 respectively. The valve spring 37 is located between the upper guide sleeve 14 and the valve core 32, and the top and bottom ends of the valve spring 37 are respectively abutted on the upper guide sleeve 14 and the valve core 32.

[0047] Reference Figure 3The arrangement of the upper guide sleeve 14 and the lower guide sleeve 15 improves the sliding stability of the main rod 331 and the stability of the force applied to the steel ball 36. At the same time, the operator can directly observe the moving state of the main rod 331 from the through hole 16 of the upper guide sleeve 14 from the outside.

[0048] Reference Figure 3 , Figure 4 and Figure 7 , and also includes a schematic member 6 for displaying the blocking state of the filter screen 41, the schematic member 6 includes a synchronous rotating rod 61 and an indicator head 62, the synchronous rotating rod 61 is coaxially rotatably connected to the top rod 33, the bottom end of the synchronous rotating rod 61 is fixedly set on the rotating block 332, the top end of the synchronous rotating rod 61 extends to the top of the main rod 331, the middle part of the indicator head 62 is fixedly set on the top of the synchronous rotating rod 61, and the indicator head 62 is always located in the through hole 16.

[0049] Reference Figure 3 , Figure 4 and Figure 7 Since the filter assembly 4 is in the base 2, the maintenance personnel cannot directly observe the blocking condition of the filter screen 41. By setting the synchronous rotating rod 61 and the indicating head 62, the elastic arc rod 51 drives the rotating block 332 to rotate, the rotating block 332 drives the synchronous rotating rod 61 to rotate, and the rotation of the synchronous rotating rod 61 drives the indicating head 62 to rotate. The maintenance personnel can observe the rotation of the indicating head 62 in the through hole 16 on the outside of the proportional valve, so as to judge the blocking condition of the filter screen 41 at this time.

[0050] Reference Figure 4 When the steel ball 36 needs to be replaced, the operator can forcefully push the steel ball 36 out of the gap at the top of the plurality of elastic arc rods 51, and forcefully insert the new steel ball 36 into the gap at the top of the plurality of elastic arc rods 51. The elastic arc rods 51 can undergo a certain degree of reversible deformation under the action of external force.

[0051] Reference Figure 2 and Figure 3 A sealing ring 38 is also sleeved on the outer wall of the outlet 23 of the base 2 for sealing the connected pipeline.

[0052] Reference Figure 4 The steel ball seat 35 is interference fit with the step groove 24. If the steel ball seat 35 needs to be replaced, the operator needs to push the filter assembly 4 and push the steel ball seat 35 into the connecting channel 21 to realize disassembly. When the steel ball seat 35 is installed on the step groove 24, the bottom surface of the steel ball seat 35 abuts against the bottom surface of the step groove 24 and the top surface of the mounting block 43.

[0053] Reference Figure 4In order to enable the elastic arc rod 51 to better drive the rotating block 332 to rotate, a plurality of grooves 3321 can be opened on the outer wall of the rotating block 332 along the circumferential direction, and the length direction of each groove 3321 is parallel to the axial direction of the rotating block 332. The elastic arc rod 51 can enter the groove 3321 and abut against the side wall of the groove 3321 to drive the rotating block 332 to rotate.

[0054] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A proportional valve, characterized in that: The valve body comprises a main body seat (1), a base (2), a coil (31), a valve core (32), a push rod (33), a sealing sheet (34), a steel ball seat (35), a steel ball (36) and a valve spring (37); the main body seat (1) comprises an outer cover (11), an upper yoke sleeve (12) and a lower yoke sleeve (13); the upper yoke sleeve (12) and the lower yoke sleeve (13) are respectively mounted at the upper and lower ends of the outer cover (11); a valve cavity is formed between the upper yoke sleeve (12) and the lower yoke sleeve (13); the valve core (32) is slidably arranged in the valve cavity; the push rod (33) is coaxially penetrated and fixed on the valve core (32); the valve spring (37) is arranged in the valve cavity and is used for driving the valve core (32) to move downward; the coil (31) is arranged in the outer cover (11) and is wound around the upper yoke sleeve (12) and the lower yoke sleeve (13); the coil (31) surrounds the valve core (32); The base (2) is clamped at the bottom end of the outer cover (11); the sealing sheet (34) is arranged between the base (2) and the lower yoke sleeve (13); a connecting passage (21) is provided in the base (2); a through hole (341) is provided at the center of the sealing sheet (34); the push rod (33) passes through the through hole (341) and enters the connecting passage (21); an inlet (22) and an outlet (23) connected to the connecting passage (21) are provided on the base (2); a step groove (24) is provided on the inlet (22); the steel ball seat (35) is installed in the step groove (24); and the steel ball (36) is movably arranged between the push rod (33) and the steel ball seat (35); A mounting ring (5) is coaxially arranged at the upper end of the steel ball seat (35); a plurality of elastic arc rods (51) are evenly arranged on the mounting ring (5) in a circumferential direction; the top ends of the elastic arc rods (51) are bent outwardly; the plurality of elastic arc rods (51) surround the steel ball (36); when the base (2) is mounted on the outer cover (11), the top ends of the plurality of elastic arc rods (51) abut against the outer wall of the top rod (33); when the base (2) is removed from the outer cover (11), the steel ball (36) cannot pass through the gap formed by the top ends of the plurality of elastic arc rods (51) and the gap between adjacent elastic arc rods (51).

2. A proportional valve according to claim 1, characterized in that: The invention also comprises a filter assembly (4), the filter assembly (4) comprising a filter screen (41), a ring frame (42) and two mounting blocks (43), the two mounting blocks (43) being respectively fixedly arranged on both sides of the ring frame (42), the filter screen (41) being arranged on the ring frame (42), two mounting grooves (25) matching the two mounting blocks (43) being arranged on the bottom surface of the step groove (24), the filter screen (41) being located at the inlet (22), the filter screen (41) being located below the steel ball seat (35), and being used for filtering the oil entering the communication channel (21).

3. A proportional valve according to claim 2, characterized in that: The filter assembly (4) further comprises a driving member 1 and two brush holders (47). The two mounting blocks (43) are provided with slide grooves (432) on the side surfaces facing each other. The slide grooves (432) are located below the ring frame (42) and the filter screen (41). The two brush holders (47) correspond to the two slide grooves (432) one by one. One end of the brush holder (47) slides in the corresponding slide groove (432) in a rod shape. The other end of the brush holder (47) extends to the inlet (22) and is provided with a plurality of bristles (48) that abut against the filter screen (41). The driving member 1 drives the two brush holders (47) to move back and forth when the inlet (22) is connected to the outlet (23).

4. A proportional valve according to claim 3, characterized in that: The driving member 1 comprises two return springs (44), two connecting rods (45) and two driving rods (46), the two return springs (44) are respectively located in two slide grooves (432), and the two ends of the return spring (44) are respectively arranged on the end wall of the slide groove (432) and the end surface of the brush holder (47); The two connecting rods (45) are respectively fixedly arranged on the two brush holders (47); the mounting block (43) is provided with a first groove (431) for the connecting rod (45) to slide; the steel ball seat (35) is provided with a second groove (351) for the two connecting rods (45) to slide; the two return springs (44) respectively drive the two brush holders (47) to move toward a side away from each other; The mounting ring (5) is rotatably connected to the upper end of the steel ball seat (35); the driving rod (46) is fixedly arranged below the mounting ring (5); a first annular groove (352) for the two driving rods (46) to rotate is provided in the steel ball seat (35); the top end of the second groove (351) is connected to the first annular groove (352); an inclined surface cooperating with the driving rod (46) is provided on the connecting rod (45); the top end of the connecting rod (45) is located on the movable path of the driving rod (46); when the mounting ring (5) rotates, the driving rod (46) abuts against the inclined surface to drive the connecting rod (45) to move toward one side of the axis of the steel ball seat (35); The elastic arc rod (51) is provided with a blade (52). When the oil flows from the inlet (22) to the outlet (23), the blade (52) is driven by the oil and the mounting ring (5) rotates.

5. A proportional valve according to claim 4, characterized in that: The push rod (33) comprises a main rod (331), a rotating block (332) and a resisting block (333); the main rod (331) is coaxially penetrated and fixed on the valve core (32); the rotating block (332) is coaxially rotatably connected to the bottom end of the main rod (331); the resisting block (333) is coaxially rotatably connected to the bottom end of the rotating block (332); the rotating block (332) and the resisting block (333) are always located below the sealing sheet (34); the resisting block (333) is used to resist the steel ball (36); and the top end of the elastic arc rod (51) is always resisted on the rotating block (332).

6. A proportional valve according to claim 5, characterized in that: The main body seat (1) further comprises an upper guide sleeve (14) and a lower guide sleeve (15); the upper guide sleeve (14) is arranged in the upper yoke sleeve (12), and the lower guide sleeve (15) is arranged in the lower yoke sleeve (13); the upper guide sleeve (14) and the lower guide sleeve (15) are respectively located on the upper and lower sides of the valve core (32); the upper guide sleeve (14) and the lower guide sleeve (15) are respectively coaxially provided with through holes (16); the through holes (16) of the upper guide sleeve (14) are directly connected to the outside, and the upper and lower ends of the main rod (331) slide on the two through holes (16) respectively.

7. A proportional valve according to claim 6, characterized in that: It also includes a schematic member (6) for displaying the blocking state of the filter screen (41), the schematic member (6) including a synchronous rotating rod (61) and an indicator head (62), the synchronous rotating rod (61) being coaxially rotatably connected to the top rod (33), the bottom end of the synchronous rotating rod (61) being fixedly arranged on the rotating block (332), the top end of the synchronous rotating rod (61) extending above the main rod (331), the middle part of the indicator head (62) being fixedly arranged on the top end of the synchronous rotating rod (61), and the indicator head (62) being always located in the through hole (16).

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