Threaded plug-in type pilot proportional reversing valve

Abstract

The invention discloses a threaded plug-in type pilot proportional reversing valve, and relates to the technical field of reversing valves. Comprising a valve sleeve, a moving armature is slidably mounted in the valve sleeve, a push rod is fixedly mounted on the moving armature, a valve element is fixedly mounted on the push rod, a mounting ring is fixedly mounted on the side end face of the push rod, a reset spring is fixedly connected to the mounting ring, a reset groove is formed in the valve sleeve, and a reset spring is fixedly connected to the reset groove. The end, away from the mounting ring, of the reset spring is fixedly connected into the reset groove. Mounting threads are arranged on the outer side face of the valve sleeve, an oil guide channel is arranged in the valve sleeve and located below the reset groove, and an oil port A, an oil port B, an oil port C and an oil port D are formed in the side end face of the valve sleeve. According to the reversing valve, the auxiliary assembly is installed on the reversing valve, the performance of the reversing valve under various working conditions can be effectively improved through the precise gas flow dividing design in the auxiliary assembly, and the sealing performance, stability and efficiency of the reversing valve are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of reversing valves, and particularly to a threaded cartridge-type pilot proportional reversing valve. Background Art

[0002] The threaded cartridge-type pilot proportional reversing valve is a proportional control valve used in a hydraulic system. It can control the commutation of the main valve according to a pilot signal and achieve precise control by adjusting the flow rate or pressure. It is usually used in occasions where precise control of the fluid flow direction and flow rate in the hydraulic system is required, especially in applications that are sensitive to load changes.

[0003] In the prior art, a Chinese patent with the publication number "CN208431217U" discloses a reversing valve with strong anti-leakage sealing performance. By providing a sealing layer made of rubber material, and the thickness of the sealing layer is 0.5 cm, and the sealing layer completely covers the spiral thread surface. The rubber sealing layer can effectively prevent leakage at the sealing ring of the reversing valve, so that this kind of reversing valve with strong anti-leakage sealing performance has the effect of preventing leakage and solves the problem of poor sealing effect of the existing reversing valve.

[0004] In the above-described solution, the seal between the reversing valve and the workpiece is made of rubber material to ensure the sealing effect between the reversing valve and the workpiece. However, in this solution, since the sealing performance of the reversing valve is often affected by the installation and operation accuracy, and when adjusting the reversing valve, the direction of the liquid flow will be changed, thus affecting the pressure distribution at the connection between the reversing valve and the workpiece. When the pressure distribution is uneven, ultimately, gas leakage or incomplete sealing will occur when the reversing valve is working. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a threaded cartridge-type pilot proportional reversing valve, which solves the problems mentioned in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0007] A threaded cartridge-type pilot proportional reversing valve, including a valve sleeve, a moving armature is slidably installed inside the valve sleeve, a push rod is fixedly installed on the moving armature, a valve core is fixedly installed on the push rod, a mounting ring is fixedly installed on the side end face of the push rod, a return spring is fixedly connected to the mounting ring, a return groove is opened inside the valve sleeve, and the end of the return spring away from the mounting ring is fixedly connected inside the return groove;

[0008] The outer side surface of the valve sleeve is provided with installation threads. Inside the valve sleeve and below the reset groove, an oil guiding channel is provided. On the side end surface of the valve sleeve, an A oil port, a B oil port, a C oil port, and a D oil port are provided. The valve core is inside the oil guiding channel;

[0009] An auxiliary component is provided on the valve sleeve to ensure the stability and sealing performance of the reversing valve through the auxiliary component.

[0010] Preferably, the auxiliary component includes an adjustment thread provided on the valve sleeve. An adjustment ring is movably installed on the adjustment thread. A positioning ring is fixedly installed on the side end surface of the valve sleeve. A pushing ring is slidably installed at the inner bottom of the positioning ring. A main airbag is fixedly installed on the upper end surface of the pushing ring.

[0011] Preferably, a lifting rod is fixedly installed on the lower end surface of the pushing ring. A fixing ring is fixedly installed at the bottom end of the lifting ring. A rolling ring is rotatably installed at the inner bottom of the fixing ring. An air outlet pipe is fixedly communicated with the main airbag. The end of the air outlet pipe far from the main airbag is fixedly communicated with an annular airbag. An extrusion groove is provided inside the valve sleeve and below the moving armature.

[0012] Preferably, the rolling ring is in sliding contact with the upper end surface of the adjustment ring. The end of the air outlet pipe far from the main airbag extends into the extrusion groove. The annular airbag is installed inside the extrusion airbag. The annular airbag is outside the push rod.

[0013] Preferably, a first receiving groove is provided on the side end surface of the moving armature. A positioning block is slidably installed in the first receiving groove. A limiting block is fixedly connected to the side end surface of the positioning block. A limiting groove is provided inside the first receiving groove. A first spring is fixedly connected to the limiting block.

[0014] Preferably, an extrusion airbag is fixedly installed inside the first receiving groove and on one side of the positioning block. An L-shaped connecting pipe is fixedly communicated with the extrusion airbag. The end of the L-shaped connecting pipe far from the extrusion airbag is fixedly communicated with a flexible pipe. The end of the flexible pipe far from the L-shaped connecting pipe is fixedly communicated with a connecting pipe.

[0015] Preferably, the limiting block is located inside the limiting groove and is slidably installed with the limiting groove. The end of the first spring far from the limiting block is fixedly connected inside the limiting groove. The end of the connecting pipe far from the flexible pipe is communicated with the air outlet pipe.

[0016] Preferably, a second receiving groove is provided on the outer side surface of the valve sleeve and inside the installation threads. An extrusion block is slidably installed inside the second receiving groove. A sliding block is fixedly installed on the extrusion block. A second spring is fixedly connected to the sliding block. A sliding groove is provided inside the second receiving groove.

[0017] Preferably, a pushing airbag is fixedly installed inside the second receiving groove and on one side of the sliding block, and a connecting pipe is fixedly communicated with the pushing airbag.

[0018] Preferably, the sliding block is slidably installed inside the sliding groove, one end of the second spring away from the sliding block is fixedly connected inside the sliding groove, and one end of the connecting pipe away from the pushing airbag is communicated with the air outlet pipe.

[0019] The present invention provides a threaded plug-in pilot proportional reversing valve. Compared with the prior art, it has the following beneficial effects:

[0020] 1. In the present invention, after the entire reversing valve is installed using the installation thread, by rotating the adjusting ring on the adjusting thread, through the cooperation of the adjusting ring and the rolling ring on the fixed ring, and the limit of the lifting rod and the positioning ring, the pushing ring inside the positioning ring rises inside the positioning ring, and the pushing ring is used to squeeze the total airbag, so that the gas in the total airbag enters the air outlet pipe. Part of the gas in the air outlet pipe will enter the annular airbag, and the annular airbag bulges to ensure the sealing between the push rod and the valve body, and ensure the sealing effect of the reversing valve;

[0021] 2. In the present invention, the other part of the gas in the air outlet pipe will be divided into two parts. One part will enter the hose through the connecting pipe. The gas in the hose will enter the extrusion airbag through the L-shaped connecting pipe. The extrusion airbag in the first receiving groove bulges, and the extrusion airbag is used to push the positioning block in the first receiving groove to move outward. Through the limit of the positioning block, the stability of the moving armature in the valve body is enhanced, and at the same time, the entire reversing valve is more efficient and reliable in pressure control and precision adjustment;

[0022] 3. In the present invention, the other part of the gas in the air outlet pipe will enter the pushing airbag through the connecting pipe. The pushing airbag in the second receiving groove bulges, and the pushing airbag is used to push the extrusion block in the second receiving groove to move outward. The extrusion block is used to enhance the friction between the installation thread and the workpiece, ensuring the stability and firmness of the entire reversing valve during commutation, avoiding loosening or instability caused by insufficient friction during the commutation process, and effectively improving the use effect of the reversing valve;

[0023] 4. In the present invention, by installing an auxiliary component on the reversing valve, using the precise gas diversion design in the auxiliary component, the performance of the reversing valve under various working conditions can be effectively improved, ensuring its sealing performance, stability and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of the present invention;

[0025] Figure 2 is the cross-section of the present inventionFigure 1 ;

[0026] Figure 3 is the sectional view of the present invention Figure 2 ;

[0027] Figure 4 is Figure 3 the enlarged view of part A in

[0028] Figure 5 is the sectional view of part of the valve sleeve in the present invention

[0029] Figure 6 is the structural schematic diagram of the push ring in the present invention

[0030] Figure 7 is the internal structural schematic diagram of the positioning ring in the present invention

[0031] Figure 8 is the structural schematic diagram of the extrusion block in the present invention

[0032] Figure 9 is the internal structural schematic diagram of the moving armature in the present invention

[0033] In the figure: 1. valve sleeve; 2. moving armature; 3. push rod; 4. valve core; 5. mounting ring; 6. return spring; 7. return groove; 8. mounting thread; 9. oil guiding channel; 10. port A; 11. port B; 12. port C; 13. port D; 14. adjusting thread; 15. adjusting ring; 16. positioning ring; 17. push ring; 18. main airbag; 19. lifting rod; 20. fixing ring; 21. rolling ring; 22. air outlet pipe; 23. annular airbag; 24. extrusion groove; 25. first storage groove; 26. positioning block; 27. limiting block; 28. limiting groove; 29. first spring; 30. extrusion airbag; 31. L-shaped connecting pipe; 32. hose; 33. connecting pipe; 34. second storage groove; 35. extrusion block; 36. sliding block; 37. second spring; 38. sliding groove; 39. push airbag; 40. communicating pipe. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1-9, the present invention is a screw-in type pilot proportional reversing valve, which includes a valve sleeve 1. A moving armature 2 is slidably installed inside the valve sleeve 1. A push rod 3 is fixedly installed on the moving armature 2. A valve core 4 is fixedly installed on the push rod 3. An installation ring 5 is fixedly installed on the side end face of the push rod 3. A return spring 6 is fixedly connected to the installation ring 5. A return groove 7 is formed inside the valve sleeve 1. One end of the return spring 6 away from the installation ring 5 is fixedly connected inside the return groove 7. An installation thread 8 is formed on the outer side face of the valve sleeve 1. An oil guiding channel 9 is arranged inside the valve sleeve 1 and below the return groove 7. An A oil port 10, a B oil port 11, a C oil port 12 and a D oil port 13 are formed on the side end face of the valve sleeve 1. The valve core 4 is inside the oil guiding channel 9. An auxiliary component is arranged on the valve sleeve 1 to ensure the stability and sealing performance of the reversing valve. Among them, the moving armature 2 can utilize the electromagnetic function to achieve the moving function. And in this technical solution, some structures of the reversing valve are the same as those of the reversing valve in the prior art, and their principles are also the same, so no specific elaboration is made here.

[0036] The auxiliary component includes an adjusting thread 14 arranged on the valve sleeve 1. An adjusting ring 15 is movably installed on the adjusting thread 14. A positioning ring 16 is fixedly installed on the side end face of the valve sleeve 1. A pushing ring 17 is slidably installed on the inner bottom of the positioning ring 16. A main airbag 18 is fixedly installed on the upper end face of the pushing ring 17. A lifting rod 19 is fixedly installed on the lower end face of the pushing ring 17. A fixing ring 20 is fixedly installed at the bottom end of the lifting ring. A rolling ring 21 is rotatably installed on the inner bottom of the fixing ring 20. An air outlet pipe 22 is fixedly communicated with the main airbag 18. One end of the air outlet pipe 22 away from the main airbag 18 is fixedly communicated with an annular airbag 23. An extrusion groove 24 is arranged inside the valve sleeve 1 and below the moving armature 2. The rolling ring 21 is in sliding contact with the upper end face of the adjusting ring 15. One end of the air outlet pipe 22 away from the main airbag 18 extends into the extrusion groove 24. The annular airbag 23 is installed inside an extrusion airbag 30. The annular airbag 23 is outside the push rod 3. Among them, the rolling ring 21 is directly above the adjusting ring 15. By using the cooperation of the adjusting ring 15 and the adjusting thread 14, the rotation and lifting of the rolling ring 21 are realized.

[0037] In this embodiment, after the entire reversing valve is installed by using the installation thread 8, by rotating the adjusting ring 15 on the adjusting thread 14, through the cooperation of the adjusting ring 15 and the rolling ring 21 on the fixing ring 20, and the limit of the lifting rod 19 and the positioning ring 16, the pushing ring 17 inside the positioning ring 16 is lifted inside the positioning ring 16. By using the lifting of the pushing ring 17 to squeeze the main airbag 18, the gas in the main airbag 18 enters the air outlet pipe 22. Part of the gas in the air outlet pipe 22 enters the annular airbag 23. By the swelling of the annular airbag 23, the sealing performance between the push rod 3 and the valve body is ensured, and the sealing effect of the reversing valve is ensured.

[0038] A first receiving groove 25 is provided on the side end surface of the moving armature 2. A positioning block 26 is slidably installed in the first receiving groove 25. A limiting block 27 is fixedly connected to the side end surface of the positioning block 26. A limiting groove 28 is provided inside the first receiving groove 25. A first spring 29 is fixedly connected to the limiting block 27. An extrusion airbag 30 is fixedly installed inside the first receiving groove 25 and on one side of the positioning block 26. An L-shaped connecting pipe 31 is fixedly communicated with the extrusion airbag 30. One end of the L-shaped connecting pipe 31 far from the extrusion airbag 30 is fixedly communicated with a hose 32. One end of the hose 32 far from the L-shaped connecting pipe 31 is fixedly communicated with a connecting pipe 33. The limiting block 27 is located inside the limiting groove 28 and is slidably installed with the limiting groove 28. One end of the first spring 29 far from the limiting block 27 is fixedly connected inside the limiting groove 28. The end of the connecting pipe 33 far from the hose 32 is communicated with the air outlet pipe 22. When the main airbag 18 is not squeezed by the pushing ring 17, the gas in the extrusion airbag 30 will return to the main airbag 18, and the displaced limiting block 27 will return to its original position through the first spring 29 on the limiting block 27.

[0039] In this embodiment, another part of the gas in the air outlet pipe 22 will be divided into two parts. One part will enter the hose 32 through the connecting pipe 33. The gas in the hose 32 will enter the extrusion airbag 30 through the L-shaped connecting pipe 31. The extrusion airbag 30 inside the first receiving groove 25 bulges, and the positioning block 26 inside the first receiving groove 25 is pushed to move outward through the extrusion airbag 30. Through the limitation of the positioning block 26, the stability of the moving armature 2 inside the valve body is enhanced, and at the same time, the entire reversing valve is more efficient and reliable in pressure control and precision adjustment.

[0040] A second receiving groove 34 is provided on the outer side surface of the valve sleeve 1 and inside the installation thread 8. An extrusion block 35 is slidably installed inside the second receiving groove 34. A sliding block 36 is fixedly installed on the extrusion block 35. A second spring 37 is fixedly connected to the sliding block 36. A sliding groove 38 is provided inside the second receiving groove 34. A pushing airbag 39 is fixedly installed inside the second receiving groove 34 and on one side of the sliding block 36. A communicating pipe 40 is fixedly communicated with the pushing airbag 39. The sliding block 36 is slidably installed inside the sliding groove 38. One end of the second spring 37 far from the sliding block 36 is fixedly connected inside the sliding groove 38. The end of the communicating pipe 40 far from the pushing airbag 39 is communicated with the air outlet pipe 22. When the main airbag 18 is not squeezed by the pushing ring 17, the gas in the pushing airbag 39 will return to the main airbag 18, and the displaced extrusion block 35 will return to its original position through the second spring 37 on the extrusion block 35.

[0041] In this embodiment, another portion of the gas in the air outlet pipe 22 will enter the driving airbag 39 through the connecting pipe 40. The driving airbag 39 in the second receiving groove 34 bulges, and the driving airbag 39 is used to push the extrusion block 35 in the second receiving groove 34 to move outward. The extrusion block 35 is used to enhance the friction between the installation thread 8 and the workpiece, ensuring the stability and firmness of the entire reversing valve during commutation, avoiding loosening or instability caused by insufficient friction during the commutation process, and effectively improving the use effect of the reversing valve.

[0042] Working principle:

[0043] During use, the entire reversing valve is installed on the workpiece through the installation thread 8 on the valve sleeve 1;

[0044] After the entire reversing valve is installed using the installation thread 8, by rotating the adjusting ring 15 on the adjusting thread 14, through the cooperation of the adjusting ring 15 and the rolling ring 21 on the fixed ring 20, and the limit of the lifting rod 19 and the positioning ring 16, the driving ring 17 in the positioning ring 16 rises in the positioning ring 16. The rising of the driving ring 17 is used to squeeze the main airbag 18, so that the gas in the main airbag 18 enters the air outlet pipe 22. A portion of the gas in the air outlet pipe 22 will enter the annular airbag 23. The inflation of the annular airbag 23 ensures the sealing between the push rod 3 and the valve body;

[0045] Another portion of the gas in the air outlet pipe 22 will be divided into two parts. One part will enter the hose 32 through the connecting pipe 33. The gas in the hose 32 will enter the extrusion airbag 30 through the L-shaped connecting pipe 31. The extrusion airbag 30 in the first receiving groove 25 bulges, and the extrusion airbag 30 is used to push the positioning block 26 in the first receiving groove 25 to move outward. Through the limit of the positioning block 26, the stability of the moving armature 2 in the valve body is enhanced;

[0046] Another portion of the gas in the air outlet pipe 22 will enter the driving airbag 39 through the connecting pipe 40. The driving airbag 39 in the second receiving groove 34 bulges, and the driving airbag 39 is used to push the extrusion block 35 in the second receiving groove 34 to move outward. The extrusion block 35 is used to enhance the friction between the installation thread 8 and the workpiece, ensuring the stability and firmness of the entire reversing valve during commutation.

[0047] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A threaded cartridge type pilot proportional directional control valve, comprising a valve sleeve (1), characterized in that: A movable armature (2) is slidably installed inside the valve sleeve (1). A push rod (3) is fixedly installed on the movable armature (2). A valve core (4) is fixedly installed on the push rod (3). An installation ring (5) is fixedly installed on the side end face of the push rod (3). A return spring (6) is fixedly connected to the installation ring (5). A return groove (7) is formed inside the valve sleeve (1). One end of the return spring (6) away from the installation ring (5) is fixedly connected inside the return groove (7). Installation threads (8) are formed on the outer side face of the valve sleeve (1). An oil guiding channel (9) is arranged inside the valve sleeve (1) and below the return groove (7). An A oil port (10), a B oil port (11), a C oil port (12) and a D oil port (13) are formed on the side end face of the valve sleeve (1). The valve core (4) is located inside the oil guiding channel (9). An auxiliary component is arranged on the valve sleeve (1) to ensure the stability and sealing performance of the reversing valve.

2. The solenoid cartridge pilot operated proportional direction valve according to claim 1, characterized in that: The auxiliary component includes an adjustment thread (14) arranged on the valve sleeve (1). An adjustment ring (15) is movably installed on the adjustment thread (14). A positioning ring (16) is fixedly installed on the side end face of the valve sleeve (1). A push ring (17) is slidably installed at the inner bottom of the positioning ring (16). A main air bag (18) is fixedly installed on the upper end face of the push ring (17).

3. The solenoid-operated proportional directional control valve according to claim 2, wherein: A lifting rod (19) is fixedly installed on the lower end face of the push ring (17). A fixing ring (20) is fixedly installed at the bottom end of the lifting ring. A rolling ring (21) is rotatably installed at the inner bottom of the fixing ring (20). An air outlet pipe (22) is fixedly communicated with the main air bag (18). One end of the air outlet pipe (22) away from the main air bag (18) is fixedly communicated with an annular air bag (23). An extrusion groove (24) is arranged inside the valve sleeve (1) and below the movable armature (2).

4. The threaded plug-in pilot proportional reversing valve according to claim 3, characterized in that: The rolling ring (21) is in sliding contact with the upper end face of the adjustment ring (15). One end of the air outlet pipe (22) away from the main air bag (18) extends into the extrusion groove (24). The annular air bag (23) is installed inside an extrusion air bag (30). The annular air bag (23) is located outside the push rod (3).

5. The solenoid-operated proportional flow control valve according to claim 2, characterized in that: A first storage groove (25) is formed on the side end face of the movable armature (2). A positioning block (26) is slidably installed in the first storage groove (25). A limiting block (27) is fixedly connected to the side end face of the positioning block (26). A limiting groove (28) is formed inside the first storage groove (25). A first spring (29) is fixedly connected to the limiting block (27).

6. The threaded cartridge pilot proportional reversing valve according to claim 5, wherein: An extrusion air bag (30) is fixedly installed inside the first storage groove (25) and on one side of the positioning block (26). An L-shaped connecting pipe (31) is fixedly communicated with the extrusion air bag (30). One end of the L-shaped connecting pipe (31) away from the extrusion air bag (30) is fixedly communicated with a flexible pipe (32). One end of the flexible pipe (32) away from the L-shaped connecting pipe (31) is fixedly communicated with a connecting pipe (33).

7. The threaded plug-in pilot proportional reversing valve according to claim 6, characterized in that: The position of the limiting block (27) is inside the limiting groove (28), and it is slidably installed with the limiting groove (28). One end of the first spring (29) far from the limiting block (27) is fixedly connected inside the limiting groove (28). One end of the connecting pipe (33) far from the hose (32) is communicated with the air outlet pipe (22).

8. A threaded insert type pilot proportional directional control valve according to claim 6, characterized in that: On the outer side of the valve sleeve (1) and inside the installation thread (8), a second storage groove (34) is provided. An extrusion block (35) is slidably installed inside the second storage groove (34). A sliding block (36) is fixedly installed on the extrusion block (35). A second spring (37) is fixedly connected to the sliding block (36). A sliding groove (38) is formed inside the second storage groove (34).

9. The threaded plug-in pilot proportional reversing valve according to claim 8, wherein: Inside the second storage groove (34) and on one side of the sliding block (36), a pushing airbag (39) is fixedly installed. A connecting pipe (40) is fixedly communicated with the pushing airbag (39).

10. A threaded insert type pilot proportional reversing valve according to claim 9, characterized in that: The sliding block (36) is slidably installed inside the sliding groove (38). One end of the second spring (37) far from the sliding block (36) is fixedly connected inside the sliding groove (38). One end of the connecting pipe (40) far from the pushing airbag (39) is communicated with the air outlet pipe (22).

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