Pilot proportional pressure reducing valve with standard throttling hole

Abstract

The utility model discloses a pilot proportional pressure reducing valve with a standard throttling hole, which relates to the technical field of pressure reducing valves and comprises a valve sleeve, a valve core, a valve core spring, a throttling block, a throttling base, a cone valve, a plug, a first ejector rod and a spring seat. A cylindrical pin is installed between the outer side of the left end of the valve element and the valve sleeve, a valve element spring is installed on the inner side of the valve element, the valve element spring is arranged on a throttling base in a sleeving mode, a throttling block is riveted at the left end of the throttling base in a pressing mode, the throttling block is made of a thin plate, and throttling holes are formed in the throttling block in an etching mode. According to the pilot proportional pressure reducing valve with the standard throttling hole, the throttling valve seat is split, the throttling hole part is adjusted to be a thin plate to be manufactured into the throttling block, the throttling block is riveted to the throttling valve seat, and the riveting process is easy to achieve.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a pilot proportional pressure reducing valve with a standard throttle hole. Background Art

[0002] The pilot proportional pressure reducing valve is used on the hydraulic cooling fan gear pump to control the pressure and flow of the fan gear pump, so that the speed and torque output of the hydraulic cooling fan gear pump can be controlled. The control pressure range is 30Mpa→0Mpa. The pilot proportional pressure reducing valve mainly controls the valve port pressure. Its principle is to maintain high pressure at the valve port when the solenoid valve is powered off, so that the fan pump can maintain the highest speed and maximum torque. When the solenoid valve current is proportionally adjusted, the hydraulic oil overflows from the overflow port, and the overflow flow is proportional to the current. At this time, the valve port pressure decreases proportionally according to the overflow flow, so that the speed and torque of the fan gear pump can be adjusted. The entire adjustment process requires the standard throttle hole to have a certain accuracy, and the product performance can maintain high-precision proportional control.

[0003] It is difficult to control the processing accuracy dispersion of the existing solenoid valve throttle hole. Due to the structural limitations of the throttle base, the only optional processing methods for the throttle hole are laser drilling or drilling. The two processing methods have large aperture dispersion, which increases the difficulty of product manufacturing and makes its proportional pressure reduction characteristics inconsistent, which cannot meet the needs of actual use. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art and provides a pilot proportional pressure reducing valve with a standard throttle hole.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a pilot proportional pressure reducing valve with a standard throttle hole, including a valve sleeve, a valve core, a valve core spring, a throttle block, a throttle base, a cone valve, a plug, a push rod, and a spring seat.

[0006] The outer side of the valve sleeve is covered with a polytetrafluoro retaining ring and an O-ring in sequence from left to right, a valve core is installed in the valve sleeve, a cylindrical pin is installed between the outer side of the left end of the valve core and the valve sleeve, a valve core spring is installed on the inner side of the valve core, the valve core spring is covered on the throttling base, a throttling block is riveted on the left end of the throttling base, the throttling block is made of a thin plate, and a throttling hole is etched on the throttling block;

[0007] A cone valve is installed on the right side of the throttling base, and the right side of the cone valve is set as a cone valve seat. A cone valve spring is sleeved on the outside of the cone valve and the cone valve seat, and a cone valve positioning O-ring is set between the cone valve spring and the right end of the cone valve;

[0008] The right side of the cone valve seat contacts the left end of the second push rod, the outer side of the second push rod is sleeved with a copper bearing, the right side of the copper bearing is provided with an armature, the outer side of the armature is provided with a front yoke, the left end of the outer side of the front yoke is provided with an O-ring 2, the right side of the front yoke is provided with a magnetic isolation sleeve, the outer side of the front yoke and the magnetic isolation sleeve is provided with an enameled wire, and the outer side of the enameled wire is installed with a shell;

[0009] The armature is sleeved on the outside of push rod 2 and push rod 1, and push rod 1 is arranged on the right side of push rod 2. An armature gasket sleeved on the outside of push rod 1 is arranged on the right surface of the armature, and a bearing ring and a composite bearing sleeved on the outside of push rod 1 are arranged in sequence on the right side of the armature gasket. The right end of push rod 1 is stuck in the spring seat, and an adjusting spring is installed on the right side of the spring seat. A rear yoke is arranged on the outside of the left end of the bearing ring, the composite bearing and the adjusting spring, a limiting block is sleeved on the outside of the adjusting spring on the right side of the rear yoke, and an adjusting screw is installed on the right side of the adjusting spring.

[0010] Furthermore, a valve port is provided at the left end of the valve sleeve, and an overflow port is provided upwardly on the outer side of the valve sleeve.

[0011] Furthermore, the midpoints of the throttling base, the cone valve and the push rod are on the same horizontal line.

[0012] Furthermore, a stainless steel sleeve is provided on the outside of the adjusting screw, an O-ring five is installed between the adjusting screw and the stainless steel sleeve, a locking nut two is installed on the outside of the adjusting screw end on the right side of the stainless steel sleeve, a locking nut one is sleeved on the outside of the left end of the stainless steel sleeve, an O-ring four is provided at the junction of the locking nut one, the outer shell and the stainless steel sleeve, and an O-ring six is ​​provided between the left end of the stainless steel sleeve and the rear yoke iron.

[0013] Furthermore, a plug is installed above the shell, and a plug-in is arranged in the plug.

[0014] Furthermore, a coil retaining ring, an O-ring three and a coil spacer are installed on the left side of the enameled wire from right to left in sequence.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] 1. Split the throttle valve seat, adjust the throttle hole part into a thin plate, make a throttle block, and rivet it onto the throttle valve seat. The riveting process is easy to implement;

[0017] 2. More importantly, when using thin plates, the processing method of the throttle hole can be adjusted to the etching method to process the throttle hole; the advantage of the etching process is that it is suitable for manufacturing high-precision small holes; the size and shape of the hole can be accurately controlled, and it is easier to obtain the required standard hole;

[0018] 3. Etching process is widely used to make standard holes and micro-holes. This process is suitable for batch processing and meets mass production;

[0019] 4. The processing error of the etched parts can be controlled within ±0.01. This control accuracy can fully meet the performance requirements of the product and improve the consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0022] Figure 3 It is a schematic diagram of the structure of the existing solenoid valve mentioned in the background technology.

[0023] Legend: 1. Valve sleeve, 2. O-ring 1, 3. Valve port, 4. Valve core, 5. Valve core spring, 6. Cylindrical pin, 7. PTFE retaining ring 1, 8. Throttle block, 9. Throttle base, 10. Cone valve seat, 11. Cone valve spring, 12. Cone valve, 13. Cone valve positioning O-ring, 14. O-ring 2, 15. Copper bearing, 16. O-ring 3, 17. Coil retaining ring, 18. Plug, 19. Plug, 20. Enameled wire, 21. Push rod 1, 22. Spring seat, 23. O-ring four, 24. Locking nut one, 25. Adjusting spring, 26. O-ring five, 27. Stainless steel sleeve, 28. Locking nut two, 29. Adjusting screw, 30. Limit block, 31. Rear yoke, 32. O-ring six, 33. Composite bearing, 34. Bearing ring, 35. Armature gasket, 36. Magnetic isolation sleeve, 37. Armature, 38. Housing, 39. Front yoke, 40. Coil gasket, 41. Push rod two, 42. Overflow port. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0026] like Figure 1-2As shown, the utility model provides a pilot proportional pressure reducing valve with a standard throttle hole, including a valve sleeve 1, an O-ring 2, a valve port 3, a valve core 4, a valve core spring 5, a cylindrical pin 6, a polytetrafluoroethylene retaining ring 7, a throttle block 8, a throttle base 9, a cone valve seat 10, a cone valve spring 11, a cone valve 12, a cone valve positioning O-ring 13, an O-ring 2 14, a copper bearing 15, an O-ring 3 16, a coil retaining ring 17, a plug 18, a plug 19, and an enameled Wire 20, push rod 1 21, spring seat 22, O-ring 4 23, locking nut 1 24, adjusting spring 25, O-ring 5 26, stainless steel sleeve 27, locking nut 2 28, adjusting screw 29, limit block 30, rear yoke 31, O-ring 6 32, composite bearing 33, bearing ring 34, armature gasket 35, magnetic isolation sleeve 36, armature 37, shell 38, front yoke 39, coil pad 40, push rod 2 41, overflow port 42,

[0027] The outside of the valve sleeve 1 is covered with a polytetrafluoro retaining ring 7 and an O-ring 2 in sequence from left to right, a valve core 4 is installed in the valve sleeve 1, a cylindrical pin 6 is installed between the outside of the left end of the valve core 4 and the valve sleeve 1, a valve core spring 5 is installed on the inside of the valve core 4, the valve core spring 5 is covered on the throttling base 9, a throttling block 8 is riveted on the left end of the throttling base 9, the material of the throttling block 8 is set to be a thin plate, and a throttling hole is etched on the throttling block 8;

[0028] A cone valve 12 is installed on the right side of the throttling base 9, a cone valve seat 10 is arranged on the right side of the cone valve 12, a cone valve spring 11 is sleeved on the outside of the cone valve 12 and the cone valve seat 10, and a cone valve positioning O-ring 13 is arranged between the cone valve spring 11 and the right end of the cone valve 12;

[0029] The right side of the cone valve seat 10 contacts the left end of the second push rod 41, the outer side of the second push rod 41 is sleeved with a copper bearing 15, the right side of the copper bearing 15 is provided with an armature 37, the outer side of the armature 37 is provided with a front yoke 39, the outer left end of the front yoke 39 is provided with an O-ring 2 14, the right side of the front yoke 39 is provided with a magnetic isolation sleeve 36, the outer side of the front yoke 39 and the magnetic isolation sleeve 36 are provided with an enameled wire 20, the left side of the enameled wire 20 is sequentially installed with a coil retaining ring 17, an O-ring 3 16 and a coil spacer 40 from right to left, the outer side of the enameled wire 20 is installed with a shell 38, the upper side of the shell 38 is installed with a plug 18, and the plug 19 is provided in the plug 18;

[0030] The armature 37 is sleeved on the outside of the push rod 2 41 and the push rod 1 21, and the push rod 1 21 is arranged on the right side of the push rod 2 41. The armature washer 35 sleeved on the outside of the push rod 1 21 is arranged on the right side of the armature 37. The bearing ring 34 and the composite bearing 33 sleeved on the outside of the push rod 1 21 are arranged on the right side of the armature washer 35 in sequence. The right end of the push rod 1 21 is stuck in the spring seat 22, and the adjusting spring 25 is installed on the right side of the spring seat 22. The rear yoke 31 is arranged on the outside of the left end of the bearing ring 34, the composite bearing 33 and the adjusting spring 25. The adjusting spring 25 on the right side of the rear yoke 31 is arranged on the outside. The side sleeve limit block 30, an adjusting screw 29 is installed on the right side of the adjusting spring 25, a stainless steel sleeve 27 is arranged on the outside of the adjusting screw 29, an O-ring 5 26 is installed between the adjusting screw 29 and the stainless steel sleeve 27, a locking nut 28 is installed on the outside of the end of the adjusting screw 29 on the right side of the stainless steel sleeve 27, a locking nut 1 24 is sleeved on the outside of the left end of the stainless steel sleeve 27, an O-ring 4 23 is arranged at the junction of the locking nut 1 24, the housing 38 and the stainless steel sleeve 27, and an O-ring 6 32 is arranged between the left end of the stainless steel sleeve 27 and the rear yoke iron 31;

[0031] The mid-line of the throttling base 9, the cone valve 12 and the push rod 41 are on the same horizontal line;

[0032] A valve port 3 is provided at the left end of the valve sleeve 1 , and an overflow port 42 is provided upwardly on the outer side of the valve sleeve 1 .

[0033] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pilot proportional pressure reducing valve with a standard throttle hole, comprising a valve sleeve (1), a valve core (4), a valve core spring (5), a throttle block (8), a throttle base (9), a cone valve (12), a plug (18), a push rod (21), and a spring seat (22), characterized in that: The outer side of the valve sleeve (1) is covered with a polytetrafluoroethylene retaining ring (7) and an O-ring (2) in sequence from left to right, a valve core (4) is installed in the valve sleeve (1), a cylindrical pin (6) is installed between the outer side of the left end of the valve core (4) and the valve sleeve (1), a valve core spring (5) is installed on the inner side of the valve core (4), the valve core spring (5) is covered on the throttling base (9), a throttling block (8) is riveted on the left end of the throttling base (9), the throttling block (8) is made of a thin plate, and a throttling hole is etched on the throttling block (8); A cone valve (12) is installed on the right side of the throttling base (9), a cone valve seat (10) is arranged on the right side of the cone valve (12), a cone valve spring (11) is sleeved on the outside of the cone valve (12) and the cone valve seat (10), and a cone valve positioning O-ring (13) is arranged between the cone valve spring (11) and the right end of the cone valve (12); The right side of the cone valve seat (10) contacts the left end of the second push rod (41); the outer side of the second push rod (41) is sleeved with a copper bearing (15); the right side of the copper bearing (15) is provided with an armature (37); the outer side of the armature (37) is provided with a front yoke (39); the left end of the outer side of the front yoke (39) is provided with an O-ring (14); the right side of the front yoke (39) is provided with a magnetic isolation sleeve (36); the outer sides of the front yoke (39) and the magnetic isolation sleeve (36) are provided with enameled wire (20); the outer side of the enameled wire (20) is installed with a housing (38); The armature (37) is sleeved on the outside of the second push rod (41) and the first push rod (21); the right side of the second push rod (41) is provided with the first push rod (21); the right side surface of the armature (37) is provided with an armature gasket (35) sleeved on the outside of the first push rod (21); the right side of the armature gasket (35) is provided with a bearing ring (34) sleeved on the outside of the first push rod (21) and a composite bearing (33); the right end of the first push rod (21) is clamped in the spring seat (22); the right side of the spring seat (22) is provided with an adjustment spring (25); the left side of the bearing ring (34), the composite bearing (33) and the adjustment spring (25) is provided with a rear yoke (31); the outer side of the adjustment spring (25) on the right side of the rear yoke (31) is sleeved with a limiting block (30); the right side of the adjustment spring (25) is provided with an adjustment screw (29).

2. A pilot proportional pressure reducing valve with a standard throttle hole according to claim 1, characterized in that: The left end of the valve sleeve (1) is provided with a valve port (3), and the outer side of the valve sleeve (1) is provided with an overflow port (42) in an upward direction.

3. A pilot proportional pressure reducing valve with a standard throttle hole according to claim 1, characterized in that: The mid-line of the throttling base (9), the cone valve (12) and the second push rod (41) are on the same horizontal line.

4. A pilot proportional pressure reducing valve with a standard throttle hole according to claim 1, characterized in that: A stainless steel sleeve (27) is arranged on the outside of the adjusting screw (29), an O-ring (5) is installed between the adjusting screw (29) and the stainless steel sleeve (27), a locking nut (28) is installed on the outside of the end of the adjusting screw (29) on the right side of the stainless steel sleeve (27), a locking nut (1) (24) is sleeved on the outside of the left end of the stainless steel sleeve (27), an O-ring (4) (23) is arranged at the junction of the locking nut (1) (24), the housing (38) and the stainless steel sleeve (27), and an O-ring (6) (32) is arranged between the left end of the stainless steel sleeve (27) and the rear yoke (31).

5. The pilot proportional pressure reducing valve with a standard throttle hole according to claim 1, characterized in that: A plug (18) is installed above the housing (38), and a plug-in unit (19) is arranged inside the plug (18).

6. A pilot proportional pressure reducing valve with a standard throttle hole according to claim 1, characterized in that: The left side of the enameled wire (20) is provided with a coil retaining ring (17), an O-ring three (16) and a coil spacer (40) in sequence from right to left.

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