CN216742246U

CN216742246U - Proportional electromagnet direct-driven valve front feedback multi-way valve and hydraulic system

Info

Publication number: CN216742246U
Application number: CN202220001673.9U
Authority: CN
Inventors: 姜伟; 姜洪; 史浙安; 林俊策; 王哲亮
Original assignee: Shanghai Shengbang Hydraulic Co ltd; Xuzhou Shengbang Machinery Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Current assignee: Shanghai Shengbang Hydraulic Co ltd; Xuzhou Shengbang Machinery Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-06-14
Anticipated expiration: 2032-01-04

Abstract

A proportional electromagnet direct-driven valve front feedback multi-way valve and a hydraulic system are provided. The problem of current multiple unit valve's pressure compensator because the easy deformation when connecting causes the product control accuracy poor is solved. The hydraulic system comprises a main oil inlet, an oil return port, a feedback oil port, an oil inlet and return union and a plurality of working unions, wherein the oil inlet and return union comprises a flow divider valve and an LS unloading valve, the working unions comprise a valve body, a reversing valve rod and a pressure compensator, pressure oil of the main oil inlet passes through the pressure compensator and the reversing valve rod and then is connected with an oil outlet on the valve body, the pressure compensator is arranged on the valve body through a pressure compensation hole, a connecting hole is formed in the valve body, the axis of the pressure compensation hole is parallel to the axis of the connecting hole, a connecting screw rod for connecting the valve bodies of different working unions is arranged in the connecting hole, and the hydraulic system comprises a feed-back multi-way valve before the valve. The utility model has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

Description

Proportional electromagnet direct-drive valve front feedback multi-way valve and hydraulic system

Technical Field

The utility model relates to a hydraulic system, in particular to a proportional electromagnet direct-driven valve front feedback multi-way valve and a hydraulic system.

Background

The air-working truck is used as an important component of engineering machinery, at present, the domestic air-working truck mainly adopts a valve block integrated by various screw cartridge valves as a main valve, and the screw cartridge valves are mostly imported plug-in components, so that the cost of the main valve of the air-working truck is high. With the increasingly intense market competition, various overhead working truck manufacturers are constantly improving the performance of hydraulic systems and reducing the production cost. The main valve of the existing multi-way valve is usually formed by matching threaded cartridge valves, and although actions such as one-arm amplitude variation, two-arm stretching, two-arm amplitude variation, rotary table rotation, steering, platform swinging and the like of the aerial work vehicle can be realized, the valve core of the existing multi-way valve is slow in response speed, high in energy consumption and unreliable in operation, and particularly the existing pressure compensator is easy to deform when different valve bodies are connected, so that the performance of the pressure compensator is influenced, and the control precision of a product is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that a pressure compensator of the conventional multi-way valve is easy to deform during connection to cause poor product control precision in the background art, the utility model provides a proportional electromagnet direct-driven valve front feedback multi-way valve and a hydraulic system.

The technical scheme of the utility model is as follows: the utility model provides a feedback multiple unit valve before valve that proportion electro-magnet directly drives, includes main oil inlet, oil return opening, feedback hydraulic fluid port, advances oil return antithetical couplet and a plurality of work antithetical couplet, advance oil return antithetical couplet include flow divider and LS off-load valve, the work antithetical couplet include valve body, switching-over valve rod and pressure compensator, the pressure oil of main oil inlet links to each other with the oil-out on the valve body behind pressure compensator, the switching-over valve rod, the pressure compensator of saying locate on the valve body through the pressure compensation hole, the valve body on be equipped with the connecting hole, the axle center of pressure compensation hole and the axle center parallel arrangement of connecting hole, the connecting hole in be equipped with the connecting screw that the valve body that makes different work antithetical couplets is connected.

As a further improvement of the utility model, a plurality of connecting holes are arranged on the valve body, connecting screws are arranged in the connecting holes, and locking nuts are arranged on the connecting screws.

As a further improvement of the utility model, the oil-gas separator further comprises a tail joint, different working joints are arranged between the oil inlet and return joint and the tail joint, and the connecting screw rod penetrates through the tail joint and is locked by the locking nut.

As a further improvement of the utility model, the pressure compensation hole where the pressure compensator is located is perpendicular to the mounting hole where the working connection reversing valve rod is located.

As a further improvement of the utility model, the valve body is provided with a spring cavity for adjusting a pressure compensator, a compensator spring is arranged in the spring cavity, the valve body is provided with a shuttle valve connected with the spring cavity, and the shuttle valves of different couplings are fed back to a feedback port of the pump through a feedback oil port.

As a further improvement of the utility model, the different work units are integrally formed by casting.

As a further improvement of the utility model, the valve body is provided with proportional electromagnets which are arranged at two ends of the reversing valve rod and used for driving the reversing valve rod to axially displace.

As a further improvement of the utility model, the reversing valve rod is provided with a throttling port for regulating speed and a throttling groove for providing back pressure, the throttling groove comprises a first throttling groove and a second throttling groove which is arranged in an arc shape, and the first throttling groove and the second throttling groove are arranged on the outer surface of the reversing valve rod at a certain interval and are communicated with each other in the reversing valve rod.

As a further improvement of the utility model, an oil supplementing overflow valve is arranged between a pressure oil outlet of the reversing valve rod and an oil outlet on the valve body, and the oil supplementing overflow valve is communicated with an oil return port.

The hydraulic system of the proportional electromagnet direct-drive valve front feedback multi-way valve comprises a pump, wherein the pump is communicated with a main oil inlet, a flow divider valve is arranged between the main oil inlet and an oil return port, an LS overflow valve is arranged on an oil inlet and return link, and a feedback oil port is connected with the oil return port through the LS overflow valve and the LS unloading valve.

The pressure compensator has the beneficial effects that the axis of the pressure compensation hole is parallel to the axis of the connecting hole, so that the pressure compensation hole is prevented from deforming when the valve body is connected by using the connecting screw rod, and the performance of the pressure compensator is further prevented from being influenced. The utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic top view of an embodiment of the present invention.

Fig. 3 is a schematic sectional structural view of a reversing valve rod 6 of the working connection 2 according to the embodiment of the utility model.

FIG. 4 is a schematic cross-sectional view at C-C in FIG. 3.

Fig. 5 is a schematic structural diagram of the reversing valve rod 6 in fig. 3.

Fig. 6 is a schematic diagram of a hydraulic system according to an embodiment of the present invention.

Fig. 7 is a hydraulic schematic of an embodiment of the present invention.

In the figure, 1, an oil inlet and return link; 2. a working unit; 3. a flow divider valve; 4. an LS unloader valve; 5. a valve body; 51. an oil outlet; 52. a pressure compensation hole; 53. connecting holes; 54. mounting holes; 55. a spring cavity; 56. a shuttle valve; 57. a proportional electromagnet; 6. a reversing valve rod; 61. a choke; 62. a first throttle groove; 63. a second throttle groove; 7. a pressure compensator; 71. a compensator spring; 8. connecting a screw rod; 81. locking the nut; 9. tail connection; 10. a feedback port; 11. an oil-supplementing overflow valve; 12. a pump; 13. an LS overflow valve; p, a main oil inlet; t, an oil return port; LS and a feedback oil port.

Detailed Description

The embodiments of the utility model will be further described with reference to the accompanying drawings in which:

referring to fig. 1 and fig. 2-7, a proportional electromagnet direct-drive valve front feedback multi-way valve comprises a main oil inlet P, an oil return port T, a feedback oil port LS, an oil inlet and return coupling 1 and a plurality of working couplings 2, wherein the oil inlet and return coupling 1 comprises a flow dividing valve 3 and an LS unloading valve 4, the working couplings 2 comprise a valve body 5, a reversing valve rod 6 and a pressure compensator 7, pressure oil of the main oil inlet P passes through the pressure compensator 7 and the reversing valve rod 6 and then is connected with an oil outlet 51 on the valve body 5, the pressure compensator 7 is arranged on the valve body 5 through a pressure compensation hole 52, a connecting hole 53 is formed in the valve body 5, the axis of the pressure compensation hole 52 is parallel to the axis of the connecting hole 53, and a connecting screw 8 for connecting the valve bodies 5 of different working couplings 2 is arranged in the connecting hole 53. The pressure compensator has the beneficial effects that the axis of the pressure compensation hole is parallel to the axis of the connecting hole, so that the pressure compensation hole is prevented from deforming when the valve body is connected by using the connecting screw rod, and the performance of the pressure compensator is further prevented from being influenced. The utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like. The P port of the utility model is supplied with oil from a variable pump, and the input current of the proportional electromagnet is controlled to drive the reversing valve rod to move and reverse, thereby driving the oil cylinder or the motor to act, and the motions of one-arm amplitude variation, two-arm expansion and contraction, two-arm amplitude variation, rotary table rotation, steering, platform swing and the like. The maximum flow is 50L/min, and the maximum working pressure is 35 MPa; the utility model adopts the pressure compensation before the valve, and the flow of the valve body is only related to the throttling orifice on the reversing valve rod and the compensator spring. And the flow saturation problem of a common load sensing system can be solved regardless of the load. Meanwhile, the valve rod can be designed according to the requirements of different vehicle types, and different flow requirements can be met only by changing the size of a throttling opening on the reversing valve rod; the problem of single main valve flow selection interval of the existing integrated threaded cartridge valve is solved, and the integrated threaded cartridge valve has better speed regulation performance. The utility model is provided with a structure of a flow divider and an LS unloading valve, when each pair of reversing valve rods is in an out-of-operation state; the hydraulic oil pumped into the multi-way valve is directly returned to the oil tank at a lower pressure, so that the energy consumption is reduced. The LS overflow valve is arranged to limit the highest pressure of the system to ensure the safety of the system, and the working union can provide an oil supplementing overflow valve according to the system requirement.

The valve body 5 is provided with a plurality of connecting holes 53, a plurality of connecting screws 8 are arranged in the connecting holes 53, and locking nuts 81 are arranged on the connecting screws 8. The structure is convenient for the reliable connection of the valve bodies of different couplings, and the structure is simple, and the connection is convenient and reliable.

The utility model discloses still include the tail and ally oneself with 9, different work ally oneself with 2 locates into oil return and ally oneself with 1 and the tail allies oneself with between 9, connecting screw 8 pass the tail allies oneself with 9 and pass through lock nut 81 lock. The tail is connected to be convenient for the oil circuit intercommunication, plays certain guard action simultaneously.

The pressure compensation hole 52 where the pressure compensator 7 is located is arranged perpendicular to the mounting hole 54 where the reversing valve rod 6 of the working connection 2 is located. The structure ensures that the pressure compensation hole and the pressure compensator arranged in the pressure compensation hole are not easy to deform when the connecting screw rod is connected, avoids influencing the performance of the pressure compensator, and is convenient for the communication of the pressure compensator and the reversing valve rod.

The pressure compensator is characterized in that a spring cavity 55 for adjusting the pressure compensator 7 is arranged on the valve body 5, a compensator spring 71 is arranged in the spring cavity 55, a shuttle valve 56 connected with the spring cavity 55 is arranged on the valve body 5, and the shuttle valves 56 of different couplings are fed back to the feedback port 10 of the pump 12 through a feedback oil port LS. Each working pair is provided with a shuttle valve, when two or more working pairs work simultaneously, the highest load pressure is fed back to a pump feedback port through the LS shuttle valve, and the pump provides flow according to the demand of the system.

The different work connectors 2 are integrally formed by casting. The cast valve body is adopted, the oil feeding capacity of the valve body is high, and the pressure loss can be effectively reduced.

The valve body 5 is provided with a proportional electromagnet 57, and the proportional electromagnet 57 is arranged at two ends of the reversing valve rod 6 and is used for driving the reversing valve rod 6 to axially displace. The proportional electromagnet drives the reversing valve rod to reverse, so that accurate control of valve rod displacement is realized, and the electromagnet directly drives the valve rod and has higher response speed with a traditional hydraulic control reversing/manual reversing mechanism.

The reversing valve rod 6 is provided with a throttling port 61 for speed regulation and a throttling groove for providing back pressure, the throttling groove comprises a first throttling groove 62 and a second throttling groove 63 which is arranged in an arc shape, and the first throttling groove 62 and the second throttling groove 63 are arranged on the outer surface of the reversing valve rod 6 at a certain interval and communicated with each other inside the reversing valve rod 6. The throttle groove is additionally arranged on the reversing valve rod, so that a certain oil return back pressure is provided, and the problem of falling and shaking of the oil cylinder is solved.

An oil supplementing overflow valve 11 is arranged between a pressure oil outlet of the reversing valve rod 6 and an oil outlet 51 on the valve body 5, and the oil supplementing overflow valve 11 is communicated with an oil return port T. The oil-supplementing overflow valve is arranged, so that the product acts more stably.

The hydraulic system of the valve front feedback multi-way valve directly driven by the proportional electromagnet comprises a pump 12, wherein the pump 12 is communicated with a main oil inlet P, a flow divider valve 3 is arranged between the main oil inlet P and an oil return port T, an LS overflow valve 13 is arranged on an oil inlet-return union 1, and a feedback oil port LS is connected with the oil return port T through the LS overflow valve and an LS unloading valve 4. The P port of the utility model is supplied with oil from a variable pump, and the input current of the proportional electromagnet is controlled to drive the reversing valve rod to move and reverse, thereby driving the oil cylinder or the motor to act, and the motions of one-arm amplitude variation, two-arm expansion and contraction, two-arm amplitude variation, rotary table rotation, steering, platform swing and the like. The maximum flow is 50L/min, and the maximum working pressure is 35 MPa; the utility model adopts the pressure compensation before the valve, and the flow of the valve body is only related to the throttling orifice on the reversing valve rod and the compensator spring. And the flow saturation problem of a common load sensing system can be solved regardless of the load. Meanwhile, the valve rod can be designed according to the requirements of different vehicle types, and different flow requirements can be met only by changing the size of a throttling opening on the reversing valve rod; the problem of single main valve flow selection interval of the existing integrated threaded cartridge valve is solved, and the integrated threaded cartridge valve has better speed regulation performance. The utility model is provided with a structure of a flow divider and an LS unloading valve, when each pair of reversing valve rods is in an out-of-operation state; the hydraulic oil pumped into the multi-way valve is directly returned to the oil tank at a lower pressure, so that the energy consumption is reduced. The LS overflow valve is arranged to limit the highest pressure of the system to ensure the safety of the system, and the working union can provide an oil supplementing overflow valve according to the system requirement.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims

1. A proportional electromagnet direct-driven valve front feedback multi-way valve comprises a main oil inlet (P), an oil return port (T), a feedback oil port (LS), an oil inlet and return linkage (1) and a plurality of working linkages (2), and is characterized in that the oil inlet and return linkage (1) comprises a flow divider valve (3) and an LS unloading valve (4), the working linkages (2) comprise a valve body (5), a reversing valve rod (6) and a pressure compensator (7), pressure oil of the main oil inlet (P) passes through the pressure compensator (7) and the reversing valve rod (6) and then is connected with an oil outlet (51) on the valve body (5), the pressure compensator (7) is arranged on the valve body (5) through a pressure compensation hole (52), a connecting hole (53) is formed in the valve body (5), the axis of the pressure compensation hole (52) is arranged in parallel to the axis of the connecting hole (53), and a connection for connecting the valve bodies (5) of different working linkages (2) is arranged in the connecting hole (53) A screw (8).

2. The proportional electromagnet direct-drive valve front feedback multi-way valve is characterized in that a plurality of connecting holes (53) are formed in the valve body (5), connecting screws (8) are arranged in the connecting holes (53), and locking nuts (81) are arranged on the connecting screws (8).

3. The proportional electromagnet direct-drive valve front feedback multi-way valve is characterized by further comprising a tail joint (9), different working joints (2) are arranged between the oil inlet and return joint (1) and the tail joint (9), and the connecting screw (8) penetrates through the tail joint (9) and is locked through the locking nut (81).

4. The proportional electromagnet direct-drive valve front feedback multi-way valve as claimed in claim 1, characterized in that a pressure compensation hole (52) where the pressure compensator (7) is located is arranged perpendicular to a mounting hole (54) where the reversing valve rod (6) of the working connection (2) is located.

5. The proportional electromagnet direct-drive valve front feedback multi-way valve is characterized in that a spring cavity (55) used for adjusting a pressure compensator (7) is formed in the valve body (5), a compensator spring (71) is arranged in the spring cavity (55), a shuttle valve (56) connected with the spring cavity (55) is arranged on the valve body (5), and the shuttle valves (56) of different couplings are fed back to a feedback port (10) of the pump (12) through a feedback oil port (LS).

6. The proportional electromagnet direct-drive valve front feedback multi-way valve as claimed in claim 1, wherein different working units (2) are integrally formed by casting.

7. The proportional electromagnet direct-drive valve front feedback multi-way valve as claimed in claim 1, wherein a proportional electromagnet (57) is arranged on the valve body (5), and the proportional electromagnet (57) is arranged at two ends of the reversing valve rod (6) and is used for driving the reversing valve rod (6) to axially displace.

8. The proportional electromagnet direct-drive valve front feedback multi-way valve is characterized in that a throttle opening (61) for speed regulation and a throttle groove for back pressure supply are formed in the reversing valve rod (6), the throttle groove comprises a first throttle groove (62) and a second throttle groove (63) which is arranged in an arc shape, and the first throttle groove (62) and the second throttle groove (63) have a certain distance on the outer surface of the reversing valve rod (6) and are communicated with each other inside the reversing valve rod (6).

9. The proportional electromagnet direct-driven valve front feedback multi-way valve as claimed in claim 1, wherein an oil supplementing overflow valve (11) is arranged between a pressure oil outlet of the reversing valve rod (6) and an oil outlet (51) on the valve body (5), and the oil supplementing overflow valve (11) is communicated with an oil return port (T).

10. A hydraulic system of a valve front feedback multi-way valve directly driven by a proportional electromagnet according to any one of claims 1 to 9, characterized in that: the oil return device comprises a pump (12), wherein the pump (12) is communicated with a main oil inlet (P), a flow dividing valve (3) is arranged between the main oil inlet (P) and an oil return port (T), an LS overflow valve (13) is arranged on an oil inlet-return union (1), and a feedback oil port (LS) is connected with the oil return port (T) through the LS overflow valve (13) and an LS unloading valve (4).