CN107131329B

CN107131329B - Duplex manual reversing valve

Info

Publication number: CN107131329B
Application number: CN201710443536.4A
Authority: CN
Inventors: 赵海; 林佩剑
Original assignee: Kunshan Haixin Electromechanical Technology Co ltd
Current assignee: Kunshan Haixin Electromechanical Technology Co ltd
Priority date: 2017-06-13
Filing date: 2017-06-13
Publication date: 2023-02-28
Anticipated expiration: 2037-06-13
Also published as: CN107131329A

Abstract

The invention discloses a duplex manual reversing valve, belongs to the technical field of valves, and is designed for solving the problems of single function and the like of the existing structure. The duplex manual reversing valve comprises a duplex valve body, wherein two reversing valve components are arranged in the duplex valve body, each reversing valve component is connected with a manual operating mechanism, and connecting structures are respectively arranged on the two manual operating mechanisms; after the two connecting structures are connected, the two manual operating mechanisms can jointly control the two reversing valve assemblies to perform reversing together, and when the two connecting structures are not connected, the two manual operating mechanisms can respectively control the reversing valve assemblies connected with the two manual operating mechanisms to perform reversing. The two manual operation mechanisms can be connected together to jointly control the two reversing valve assemblies to carry out reversing together, and can also be separately and independently controlled to carry out reversing on the reversing valve assemblies connected with the two manual operation mechanisms, so that the current situation that the existing manual reversing valve is single in function is effectively solved.

Description

Duplex manual reversing valve

Technical Field

The invention relates to the technical field of valves, in particular to a duplex manual reversing valve.

Background

The manual reversing valve is one of main control elements for reversing a hydraulic oil path in a hydraulic system, and is widely applied to various mechanical hydraulic control loops.

The existing widely-used manual reversing valve has a single function, for example, a WMM type manual reversing valve of Rexroth only has a function of one reversing valve and has no other composite functions. In other technical schemes, although an integral multi-connection reversing valve is provided, the multi-connection reversing valve integrates the functions of a plurality of manual reversing valves, but the manual linkage reversing function of the plurality of reversing valves cannot be realized.

At present, hydraulic actuating mechanisms controlled by two hydraulic reversing valves are sometimes arranged at two ends of an inlet circuit and an outlet circuit of a system, so that the reversing valves are required to be capable of independently controlling a single hydraulic actuating mechanism and have the function of simultaneously controlling two hydraulic actuating mechanisms to simultaneously act.

Disclosure of Invention

The invention aims to provide a duplex manual reversing valve which can be used for single action and linkage.

In order to achieve the purpose, the invention adopts the following technical scheme:

a duplex manual reversing valve comprises a duplex valve body, wherein two reversing valve components are arranged in the duplex valve body, each reversing valve component is connected with a manual operation mechanism, and the two manual operation mechanisms are respectively provided with a connecting structure; after the two connecting structures are connected, the two manual operating mechanisms can jointly control the two reversing valve assemblies to perform reversing together, and when the two connecting structures are not connected, each manual operating mechanism can respectively control the reversing valve assemblies connected with the manual operating mechanisms to perform reversing.

Furthermore, each manual operation mechanism comprises a pushing assembly and a push rod, the push rod is connected with a valve core in the reversing valve assembly corresponding to the push rod, a groove is formed in the push rod, at least part of the pushing assembly is contained in the groove and is in contact with the inner wall surface of the groove, and the part of the pushing assembly contained in the groove can swing along the inner wall surface of the groove so as to push the push rod to move linearly.

Further, each pushing assembly comprises a first rotating shaft and a second rotating shaft, and the connecting structure is arranged on the first rotating shaft; in the same pushing assembly, the second rotating shaft is sleeved in the first rotating shaft and connected with the first rotating shaft, the first rotating shaft and the second rotating shaft are both arranged perpendicular to the push rod, part of the push rod is sleeved in a containing hole in the first rotating shaft, and the length of the containing hole in the extending direction of the first rotating shaft is greater than the diameter of the push rod; any one first rotating shaft can move relative to the push rod along the extending direction of the first rotating shaft so as to be close to or far away from the other first rotating shaft.

Furthermore, each hand operating mechanism comprises a first handle and a shell, the first handles of the two hand operating mechanisms are arranged oppositely, in each hand operating mechanism, the shell is sleeved outside the first rotating shaft, one end of the first handle is connected with the first rotating shaft, the other end of the first handle penetrates out of the shell and is arranged outside the shell, and a first compression spring is arranged between one end of the first rotating shaft, close to the first handle connected with the first rotating shaft, and the shell.

Furthermore, each hand-operated mechanism comprises a second handle, the second handle of the same hand-operated mechanism is connected with the first rotating shaft, and the second handle is used for driving the first rotating shaft to rotate.

Further, each of the connecting structures includes a plurality of protrusions or recesses, and the two connecting structures are capable of engaging with each other.

Furthermore, each reversing valve component comprises an inner end cover, a valve core, a spring component and an outer end cover which are sequentially arranged along the direction far away from the manual operating mechanism, and the spring component is used for providing a return spring force for the valve core.

Further, the spring assembly comprises at least two second compression springs, and all the second compression springs are sequentially sleeved.

Furthermore, a pressing sheet is arranged between the spring assembly and the valve core.

Furthermore, the manual operation mechanism is connected with the valve core through a connecting rod, a balance rod is arranged between the spring assembly and the outer end cover, the connecting rod and the balance rod are equal in diameter, and the axes of the connecting rod and the balance rod are collinear.

The invention has the following beneficial effects:

the manual operating mechanisms of the two reversing valve components of the duplex manual reversing valve can be connected together to jointly control the two reversing valve components to carry out reversing together, and can also be separately and independently controlled to carry out reversing together with the reversing valve components connected with the reversing valve components, so that the manual operating mechanisms are integrated with single-action and linkage functions, the current situation that the existing manual reversing valve is single in function is effectively solved, the structure is compact, the functions are rich, the design of a related hydraulic system can be greatly simplified, and the requirement of complex hydraulic control of the two related hydraulic actuating mechanisms is met.

Drawings

FIG. 1 is a schematic structural diagram of a dual manual directional control valve according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of one of the valve components of the duplex manual directional valve and the manual operating mechanism connected with the valve component according to the first preferred embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a dual manual directional control valve in a linkage state according to a preferred embodiment of the present invention;

fig. 4 is a schematic structural diagram of a duplex manual directional control valve in a single-acting state according to a preferred embodiment of the present invention.

In the figure:

1. a double valve body; 2. a manual operation mechanism; 3. a reversing valve assembly; 4. a connecting structure; 5. a connecting rod; 6. a valve housing; 21. a push rod; 22. a first rotating shaft; 23. a second rotating shaft; 24. a housing; 25. a first handle; 26. a first compression spring; 27. a second handle; 31. an inner end cap; 32. a valve core; 33. a second compression spring; 34. an outer end cover; 35. a balancing pole; 36. tabletting; 211. a groove; 221. an accommodation hole; 241. a housing main body; 242. and a shell cover.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The first preferred embodiment:

as shown in fig. 1 to 4, the embodiment provides a duplex manual directional valve, which includes a duplex valve body 1, two directional valve assemblies 3 are arranged in the duplex valve body 1, each directional valve assembly 3 is connected to one manual operating mechanism 2, and the two manual operating mechanisms 2 are respectively provided with a connecting structure 4; after the two connecting structures 4 are connected, the two manual operating mechanisms 2 can jointly control the two reversing valve assemblies 3 to perform reversing together, and when the two connecting structures 4 are not connected, each manual operating mechanism 2 can respectively control the reversing valve assemblies 3 connected with the manual operating mechanisms to perform reversing. The connecting structure 4 and the manual operating mechanism 2 can be an integrated structure or a split structure.

Specifically, the double valve body 1 is provided with a first oil port P1, a first oil port A1, a first oil port B1 and a first oil port T1 corresponding to one reversing valve assembly 3, and the double valve body 1 is further provided with a second oil port P2, a second oil port A2, a second oil port B2 and a second oil port T2 corresponding to the other reversing valve assembly 3.

The manual operation mechanisms 2 of the two reversing valve assemblies 3 of the duplex manual reversing valve provided by the embodiment can be connected together to jointly control the two reversing valve assemblies 3 to carry out reversing together, and can also be separately and independently controlled to carry out reversing together with the reversing valve assemblies 3 connected with the manual operation mechanisms, so that the manual operation mechanism integrates the functions of single action and linkage, effectively solves the current situation that the conventional manual reversing valve is single in function, has compact structure and rich functions, can greatly simplify the design of related hydraulic systems, and meets the requirement of complex hydraulic control of the two related hydraulic actuating mechanisms.

In this embodiment, the specific structure of the connection structure 4 is not limited, and the two hand-operated mechanisms 2 may be connected. However, in order to make the construction simpler, each connecting structure 4 comprises a plurality of projections or recesses, with which the two connecting structures 4 can engage with one another.

In this implementation, the structure of the manual operating mechanism 2 is not particularly limited, and the reversing valve assembly 3 may be controlled to reverse, as a preferred embodiment, each manual operating mechanism 2 includes a pushing assembly and a push rod 21, the push rod 21 is connected to the valve core 32 in the reversing valve assembly 3 corresponding to the push rod 21, a groove 211 is formed in the push rod 21, at least a portion of the pushing assembly is accommodated in the groove 211 and contacts with an inner wall surface of the groove 211, and a portion of the pushing assembly accommodated in the groove 211 can swing along the inner wall surface of the groove 211 to further push the push rod 21 to move linearly. In the present embodiment, the push rod 21 is preferably a straight rod. In the present embodiment, the portion of the pushing assembly accommodated in the recess 211 swings in the longitudinal section of the extending direction of the push rod 21. The longitudinal section of the recess 211 in the extension direction of the push rod 21 is preferably U-shaped or U-like shaped. The manual operating mechanism 2 provided by this embodiment rubs the push rod 21 when the pushing assembly swings, so as to generate a pushing force on the push rod 21, so that the push rod 21 makes a linear motion in the extending direction thereof, and further drives the valve core 32 of the reversing valve assembly 3 to move.

In this embodiment, each pushing assembly includes a first rotating shaft 22 and a second rotating shaft 23, and the connecting structure 4 is disposed on the first rotating shaft 22; in the same pushing assembly, the second rotating shaft 23 is sleeved in the first rotating shaft 22 and connected with the first rotating shaft 22, the first rotating shaft 22 and the second rotating shaft 23 are both arranged perpendicular to the push rod 21, a part of the push rod 21 is sleeved in the accommodating hole 221 on the first rotating shaft 22, and the length of the accommodating hole 221 in the extending direction of the first rotating shaft 22 is greater than the diameter of the push rod 21; any one of the first rotating shafts 22 can move in the extending direction thereof relative to the push rod 21 so as to approach or separate from the other first rotating shaft 22. When the two first rotating shafts 22 are close, the two connecting structures 4 are meshed and connected; when the first two shafts 22 are far away, the two connecting structures 4 are disengaged and the two connecting structures are separated.

In this embodiment, the engaging and disengaging modes of the two hand-operated mechanisms 2 are not particularly limited, but preferably, each hand-operated mechanism 2 includes a housing 24 and a first handle 25, the first handles 25 of the two hand-operated mechanisms 2 are oppositely disposed, in each hand-operated mechanism 2, the housing 24 is sleeved outside the first rotating shaft 22, one end of the first handle 25 is connected with the first rotating shaft 22, the other end of the first handle penetrates through the housing 24 and is disposed outside the housing 24, and a first compression spring 26 is disposed between one end of the first rotating shaft 22, which is close to the first handle 25 connected thereto, and the housing 24. When the two hand-operated mechanisms 2 need to be separated, the first rotating shaft 22 connected with any one first handle 25 is driven by the first handle 25 to move in the direction away from the other first rotating shaft 22 so as to separate the two hand-operated mechanisms 2, and after the first handle 25 is released, the first compression spring 26 provides a return spring force for the first rotating shaft 22. In this embodiment, in order to facilitate assembling of the parts, it is preferable that the housing 24 includes a housing main body 241 and a housing cover 242; the case cover 242 is detachably attached to the case main body 241 by a fastening member such as a screw.

In this embodiment, each hand-operated mechanism 2 includes a second handle, and the second handle is connected to the first rotating shaft 22, and the second handle is used for driving the first rotating shaft 22 to rotate.

In this embodiment, each reversing valve assembly 3 includes an inner end cap 31, a valve core 32, a spring assembly and an outer end cap 34, which are sequentially arranged in a direction away from the hand-operated mechanism 2, and the spring assembly is used for providing a return spring force for the valve core 32. Due to the arrangement of the inner end cover 31, the manual operation mechanism 2 is isolated from oil in the reversing valve assembly 3 and is not influenced by the pressure of the oil in the reversing valve assembly 3, and the sealing design problem caused by the pressure inside the manual operation mechanism 2 is avoided.

In this embodiment, a valve sleeve 6 is disposed between the valve core 32 and the double valve body 1.

Further, the spring assembly includes at least two second compression springs 33, and all the second compression springs 33 are sequentially sleeved. Specifically, in the present embodiment, the spring assembly includes two springs. In this embodiment, when the reversing valve assembly 3 reverses, the valve core 32 moves left and right, and both generate the restoring spring force through the spring assembly. In the embodiment, the reset spring assembly of the reversing valve assembly 3 is arranged at one end of the reversing valve, so that the problem of position difference of the valve core 32 under the middle working condition caused by a double-spring structure at two ends can be effectively solved; and a plurality of spring sleeves are arranged, so that the reset spring force is improved, the space is saved, and the reset can be accurately performed.

In this embodiment, in order to make the return spring force of the spring assembly more uniform and effective, a pressing plate 36 is disposed between the spring assembly and the valve core 32.

In the embodiment, the manual operating mechanism 2 is connected with the valve core 32 through the connecting rod 5, specifically, the push rod 21 of the manual operating mechanism 2 is connected with the valve core 32 through a connecting rod, a balance rod 35 is arranged between the spring assembly and the outer end cover 34, and the connecting rod 5 and the balance rod 35 have the same diameter and the same axis. The connecting rod 5 and the balance rod 35 are arranged, so that oil pressures at two ends of the valve core 32 in the reversing valve assembly 3 are the same, and the motion reliability of the valve core 32 is ensured.

The use method of the duplex manual reversing valve in the embodiment is briefly described as follows:

under normal conditions, the two duplex manual operation mechanisms 2 are in a linkage state, and reversing actions of the two reversing valves can be synchronously realized through any second handle.

When the reversing action of one reversing valve component 3 needs to be controlled independently, the two hand-operated mechanisms 2 can be separated, specifically, the first rotating shaft 22 connected with the first handle 25 is driven by any one first handle 25 to move away from the other first rotating shaft 22 so as to overcome the spring force of the first compression spring 26, the first rotating shaft 22 is moved along the vertical direction of the push rod 21 until the two connecting structures 4 are disengaged and the two first rotating shafts 22 are separated, and the reversing action of the single reversing valve component 3 can be operated independently by operating the corresponding second handle; after the reversing valve assembly 3 is reset, the first handle 25 is released, and the two first rotating shafts 22 are in a linkage state again under the action of the first compression spring 26.

In the reversing process of the reversing valve assembly 3 controlled by the manual operating mechanism 2, the first rotating shaft 22 and the second rotating shaft 23 are driven to rotate by a certain angle through the second handle, and the second rotating shaft 23 rubs with the push rod 21 in the process of rotating by a certain angle (namely swinging), so that thrust is generated on the push rod 21, the push rod 21 makes linear motion in the extending direction of the push rod 21, and the valve core 32 of the reversing valve assembly 3 is driven to move.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. A duplex manual reversing valve is characterized by comprising a duplex valve body (1), wherein two reversing valve components (3) are arranged in the duplex valve body (1), each reversing valve component (3) is connected with a manual operation mechanism (2), and the two manual operation mechanisms (2) are respectively provided with a connecting structure (4); after the two connecting structures (4) are connected, the two manual operating mechanisms (2) can jointly control the two reversing valve assemblies (3) to perform reversing together, and when the two connecting structures (4) are not connected, each manual operating mechanism (2) can respectively control the reversing valve assemblies (3) connected with the manual operating mechanisms to perform reversing;

each connecting structure (4) comprises a plurality of convex parts or concave parts, and the two connecting structures (4) can be mutually meshed;

each reversing valve component (3) comprises an inner end cover (31), a valve core (32), a spring component and an outer end cover (34) which are sequentially arranged along the direction far away from the manual operation mechanism (2), and the spring component is used for providing reset spring force for the valve core (32).

2. The duplex manual reversing valve according to claim 1, wherein each manual operating mechanism (2) comprises a pushing assembly and a push rod (21), the push rod (21) is connected with a valve core (32) in the reversing valve assembly (3) corresponding to the push rod (21), a groove (211) is formed in the push rod (21), at least part of the pushing assembly is accommodated in the groove (211) and is in contact with the inner wall surface of the groove (211), and the part of the pushing assembly accommodated in the groove (211) can swing along the inner wall surface of the groove (211) to further push the push rod (21) to move linearly.

3. A twin manual directional control valve according to claim 2, characterised in that each said urging assembly comprises a first rotary shaft (22) and a second rotary shaft (23), said connecting structure (4) being provided on said first rotary shaft (22); in the same pushing assembly, the second rotating shaft (23) is sleeved in the first rotating shaft (22) and connected with the first rotating shaft (22), the first rotating shaft (22) and the second rotating shaft (23) are both arranged perpendicular to the push rod (21), part of the push rod (21) is sleeved in an accommodating hole (221) in the first rotating shaft (22), and the length of the accommodating hole (221) in the extending direction of the first rotating shaft (22) is greater than the diameter of the push rod (21); any one of the first rotating shafts (22) can move relative to the push rod (21) along the extending direction thereof so as to be close to or far away from the other first rotating shaft (22).

4. A twin manual changeover valve according to claim 3, wherein each of said hand operated mechanisms (2) includes a first handle (25) and a housing (24), the first handles (25) of the two hand operated mechanisms (2) being oppositely disposed; in each manual operating mechanism (2), the shell (24) is sleeved outside the first rotating shaft (22), one end of the first handle (25) is connected with the first rotating shaft (22), the other end of the first handle penetrates through the shell (24) and is arranged outside the shell (24), and a first compression spring (26) is arranged between one end, close to the first handle (25) connected with the first handle, of the first rotating shaft (22) and the shell (24).

5. A twin manual directional control valve according to claim 3, characterised in that each said hand operated mechanism (2) includes a second handle (27), said second handle (27) of the same hand operated mechanism (2) being connected to said first rotary shaft (22), said second handle (27) being adapted to rotate said first rotary shaft (22).

6. A twin manual directional control valve according to claim 1, characterised in that said spring assembly includes at least two second compression springs (33), all of said second compression springs (33) being nested one after the other.

7. A twin manual directional control valve according to claim 1, characterised in that a pressure plate (36) is provided between the spring assembly and the spool (32).

8. A twin manual directional control valve according to claim 1, characterised in that the manual operating mechanism (2) is connected to the spool (32) through a connecting rod (5), a balance bar (35) is provided between the spring assembly and the outer end cap (34), and the connecting rod (5) and the balance bar (35) have the same diameter and the same axis.