Decoupling type multi-way valve manual operation structure

Abstract

The utility model discloses a manual operation structure of a decoupling type multi-way valve, which comprises a shell and a handle rotationally arranged on the shell, a valve core pull rod is movably arranged on the shell in a penetrating manner, and a first spring for driving the valve core pull rod to reset is arranged between the valve core pull rod and the shell. The limiting sleeve is movably arranged between the valve element pull rod and the shell in a sleeved mode, the handle and the limiting sleeve are in transmission connection fit, the limiting sleeve can be driven to move in the axial direction by rotating the handle, and the limiting sleeve and the valve element pull rod are in limiting fit capable of relatively moving in the limiting stroke in the axial direction. The two axial ends of the limiting sleeve abut against second springs used for driving the limiting sleeve to reset. The utility model provides the manual operation structure of the decoupling type multi-way valve, which can reduce the load of an electric drive structure.

Description

Technical Field

[0001] The utility model relates to a decoupling type multi-way valve manual operation structure. Background Art

[0002] The development of electromagnetic direct-drive reversing valve is the product of the progress of hydraulic technology. The valve controls the movement of the valve core by the attraction and release of the electromagnet to achieve the reversal of the fluid. Its design purpose is to improve the response speed and control accuracy of the hydraulic system, while reducing energy loss and maintenance costs. With the continuous improvement of the level of industrial automation, the requirements for hydraulic control components are increasing. Electromagnetic direct-drive reversing valves are widely used in many fields such as engineering machinery, agricultural machinery, mining machinery, machine tools, etc. due to their simple structure, rapid response, and easy remote control.

[0003] However, when the valve is used in special equipment such as aerial work vehicles, a manual operation structure must be set up as a backup for safety redundancy considerations in order to cope with various emergencies. At present, the existing manual operation structure of the electromagnet direct-drive reversing valve is fixedly connected to the electric drive structure. When the reversing valve is driven by the electromagnet, the handle will move accordingly, which adds an additional load to the driving electromagnet. In order to meet the actuation requirements of the multi-way valve, the electric drive part must have a large driving force. Since the greater the driving force of the electromagnet, the larger its volume will be, which to a certain extent limits the further development of the electromagnet direct-drive reversing valve. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a decoupled multi-way valve manual operation structure capable of reducing the load of the electric drive structure.

[0005] The utility model discloses a manual operation structure of a decoupled multi-way valve, comprising a shell, a handle rotatably arranged on the shell, a valve core pull rod movably penetrated by the shell, a first spring for driving the valve core pull rod to reset is arranged between the valve core pull rod and the shell, the operation structure also comprises a limit sleeve, the limit sleeve is movably sleeved between the valve core pull rod and the shell, the handle and the limit sleeve form a transmission connection, the limit sleeve can be driven to move axially by rotating the handle, the limit sleeve and the valve core pull rod form a limit cooperation that can move relative to each other axially within a limited stroke, and the axial ends of the limit sleeve are both abutted against second springs for driving its reset movement.

[0006] Since the limit sleeve and the valve core pull rod form a limit fit that can move relative to each other axially within a limited stroke, the valve core pull rod can move freely within a certain stroke range without linking the handle to rotate, which can reduce the resistance of the valve core pull rod during movement and thereby reduce the load of the electric drive structure; when manual operation is required, the limit sleeve can be driven to move axially by the handle, and when the limit sleeve moves to a position that matches the axial limit fit of the valve core pull rod, it can drive the valve core pull rod to move, thereby realizing the manual operation function.

[0007] Furthermore, a handle shaft is rotatably provided on the shell, both ends of the handle shaft are placed outside the shell, one end of the handle is radially inserted and positioned at one end of the handle shaft, the middle part of the handle shaft is placed inside the shell and is provided with a shift rod, one end of the shift rod is radially inserted and positioned at the middle part of the handle shaft, a first ring groove is provided on the outside of the limit sleeve, the other end of the shift rod is inserted in the first ring groove of the limit sleeve, and the handle can drive the handle shaft to rotate when the handle is rotated, and the limit sleeve is driven to move axially by cooperating with the first ring groove through the shift rod connected to the handle shaft.

[0008] Furthermore, sealing rings are provided at the connection between the two ends of the handle shaft and the housing, which can improve the sealing effect of the connection between the handle shaft and the housing.

[0009] Furthermore, the valve core pull rod includes a guide groove radially passing through both sides thereof, and the two ends of the guide groove are extended along the two end directions of the valve core pull rod. A bayonet pin is radially penetrated on the limit sleeve, and the bayonet pin and the guide groove of the valve core pull rod constitute a movable fit. Through the fit between the bayonet pin and the guide groove, the limit sleeve and the valve core pull rod can move relative to each other axially within a limited stroke.

[0010] Furthermore, a second annular groove is provided on the outer side of the limiting sleeve, a sealing ring is provided in the second annular groove, a connecting hole for passing the bayonet is provided in the second annular groove, the sealing ring can improve the sealing effect, and providing the connecting hole in the second annular groove can make the structure more compact.

[0011] Furthermore, the shell includes a main body and a pressure cover, the main body includes mounting holes running through both ends thereof, the pressure cover is fixedly mounted at the mounting hole at one end of the main body, a valve stem support seat is arranged at the mounting hole at one end of the main body, the valve stem support seat is pressed and fixed between the main body and the pressure cover, one end of the valve core pull rod and the valve stem support seat are movably fitted together so that one end of the valve core pull rod is not easy to shake, one end of the valve core pull rod passes through the valve stem support seat and is placed outside the shell, a baffle is arranged on one end of the valve core pull rod, and the first spring is sleeved on the valve core pull rod and abuts between the valve stem support seat and the baffle.

[0012] Furthermore, both ends of the limit sleeve are provided with recessed holes / cylinders which cooperate with the end of the second spring for insertion and positioning, which can improve the force coordination effect of the second spring. One of the second spring sleeves is arranged on the valve core pull rod and abuts between the valve stem support seat and the limit sleeve, thereby improving the stability of the second spring when it is working.

[0013] The beneficial effects of the utility model are as follows: the utility model separates the handle operation of the multi-way valve from the electric drive structure through a mechanical structure, so that the two operation modes are independent of each other, and the electromagnetic drive and the handle drive are decoupled; during manual operation, the rotation of the handle can independently push the valve core pull rod to reverse the valve core; in an emergency, the handle can also be operated in reverse to reset the valve core; because the handle will not rotate when the valve core pull rod is electrically driven, the load of the electric drive structure can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of an embodiment of the utility model;

[0015] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0016] Figure 3 This is an exploded view of the handle of the embodiment of the utility model;

[0017] Figure 4 This is a structural diagram of the valve core pull rod of the embodiment of the utility model;

[0018] Figure 5 This is a schematic diagram of the assembly of the pressing plate of the embodiment of the utility model;

[0019] Figure 6 It is a structural diagram of a limiting sleeve according to an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The structure of a decoupling multi-way valve manual operation structure according to an embodiment of the utility model is as follows Figure 1-6 As shown, it includes a shell and a handle 2 rotatably arranged on the shell, a valve core pull rod 3 is movably penetrated by the shell, a first spring 41 for driving the valve core pull rod 3 to reset is arranged between the valve core pull rod 3 and the shell, the operating structure also includes a limit sleeve 5, the limit sleeve 5 is movably sleeved between the valve core pull rod 3 and the shell, the handle 2 and the limit sleeve 5 form a transmission connection, the limit sleeve 5 can be driven to move axially by rotating the handle 2, the limit sleeve 5 and the valve core pull rod 3 form a limit fit that can move relative to each other axially within a limited stroke, and the axial ends of the limit sleeve 5 are abutted against second springs 42 for driving its reset movement.

[0021] Since the limit sleeve 5 and the valve core pull rod 3 form a limit fit that can enable relative movement along the axial direction within a limited stroke, the valve core pull rod 3 can move freely within a certain stroke range without being linked to the rotation of the handle 2, which can reduce the resistance of the valve core pull rod 3 during movement, thereby reducing the load of the electric drive structure; when manual operation is required, the limit sleeve 5 can be driven to move axially by the handle 2, and when the limit sleeve 5 moves to a position that matches the axial limit of the valve core pull rod 3, it can drive the valve core pull rod 3 to move, thereby realizing the manual operation function.

[0022] A handle shaft 6 is rotatably provided on the shell, and both ends of the handle shaft 6 are placed outside the shell, one end of the handle 2 is radially inserted and positioned at one end of the handle shaft 6, the middle part of the handle shaft 6 is placed inside the shell and is provided with a lever 7, one end of the lever 7 is radially inserted and positioned at the middle part of the handle shaft 6, a first annular groove 51 is provided on the outside of the limiting sleeve 5, and the other end of the lever 7 is inserted in the first annular groove 51 of the limiting sleeve 5, when the handle 2 is rotated, the handle shaft 6 can be driven to rotate, and the limiting sleeve 5 is driven to move axially by cooperating with the first annular groove 51 through the lever 7 connected to the handle shaft 6.

[0023] Annular grooves 61 are provided at both ends of the handle shaft 6, and sealing rings are provided at the connections between the two ends of the handle shaft 6 and the housing. The sealing rings are arranged in the annular grooves 61, which can improve the sealing effect of the connection between the handle shaft 6 and the housing.

[0024] The valve core pull rod 3 includes a guide groove 31 radially passing through both sides thereof, and the two ends of the guide groove 31 are extended along the two end directions of the valve core pull rod 3. A bayonet 8 is radially penetrated on the limit sleeve 5, and the bayonet 8 and the guide groove 31 of the valve core pull rod 3 form a movable fit. Through the fit between the bayonet 8 and the guide groove 31, the limit sleeve 5 and the valve core pull rod 3 can move relative to each other axially within a limited stroke.

[0025] A second annular groove 52 is arranged on the outer side of the limiting sleeve 5, a sealing ring is arranged in the second annular groove 52, a connecting hole 53 for passing the bayonet 8 is arranged in the second annular groove 52, the sealing ring can improve the sealing effect, and arranging the connecting hole in the second annular groove 52 can make the structure more compact.

[0026] The shell includes a main body 11 and a pressure cover 12. The main body 11 includes mounting holes 111 passing through both ends thereof. The pressure cover 12 is fixedly installed at the mounting hole 111 at one end of the main body 11. A valve stem support seat 9 is provided at the mounting hole 111 at one end of the main body 11. The valve stem support seat 9 is tightly fixed between the main body 11 and the pressure cover 12. One end of the valve core pull rod 3 and the valve stem support seat 9 are movably fitted together to prevent one end of the valve core pull rod 3 from shaking easily. One end of the valve core pull rod 3 passes through the valve stem support seat 9 and is placed outside the shell. A baffle 32 is provided on one end of the valve core pull rod 3. The first spring 41 is sleeved on the valve core pull rod 3 and abuts between the valve stem support seat 9 and the baffle 32.

[0027] Both ends of the limit sleeve 5 are provided with recessed holes / cylindrical columns which cooperate with the end of the second spring 42 for insertion and positioning, which can improve the force coordination effect with the second spring 42. One of the second springs 42 is sleeved on the valve core pull rod 3 and abuts between the valve stem support seat 9 and the limit sleeve 5, thereby improving the stability of the second spring 42 during operation.

[0028] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A decoupled multi-way valve manual operation structure, comprising a housing, a handle rotatably arranged on the housing, a valve core pull rod movably passing through the housing, a first spring for driving the valve core pull rod to return to its original position is arranged between the valve core pull rod and the housing, characterized in that: The operating structure also includes a limit sleeve, which is movably arranged between the valve core pull rod and the housing. The handle and the limit sleeve form a transmission connection. The limit sleeve can be driven to move axially by rotating the handle. The limit sleeve and the valve core pull rod form a limit fit that can move relative to each other axially within a limited stroke. Both axial ends of the limit sleeve are abutted against a second spring for driving its reset movement.

2. A decoupled multi-way valve manual operation structure according to claim 1, characterized in that: A handle shaft is rotatably arranged on the shell, and both ends of the handle shaft are placed outside the shell, one end of the handle is radially inserted and positioned at one end of the handle shaft, the middle part of the handle shaft is placed inside the shell and is provided with a shift rod, one end of the shift rod is radially inserted and positioned at the middle part of the handle shaft, a first ring groove is arranged on the outside of the limiting sleeve, and the other end of the shift rod is inserted in the first ring groove of the limiting sleeve.

3. A decoupled multi-way valve manual operation structure according to claim 2, characterized in that: Sealing rings are provided at the connection points between the two ends of the handle shaft and the housing.

4. A decoupled multi-way valve manual operation structure according to claim 1, characterized in that: The valve core pull rod includes a guide groove radially penetrating both sides thereof, the two ends of the guide groove are extended along the two end directions of the valve core pull rod, a bayonet is radially penetrated on the limit sleeve, and the bayonet and the guide groove of the valve core pull rod form a movable fit.

5. A decoupled multi-way valve manual operation structure according to claim 4, characterized in that: A second annular groove is arranged on the outer side of the limiting sleeve, a sealing ring is arranged in the second annular groove, and a connecting hole for penetrating the bayonet is arranged in the second annular groove.

6. A decoupled multi-way valve manual operation structure according to claim 1, characterized in that: The shell includes a main body and a pressure cover. The main body includes mounting holes running through both ends thereof. The pressure cover is fixedly mounted at the mounting hole at one end of the main body. A valve stem support seat is arranged at the mounting hole at one end of the main body. The valve stem support seat is pressed and fixed between the main body and the pressure cover. One end of the valve core pull rod is movably fitted with the valve stem support seat. One end of the valve core pull rod passes through the valve stem support seat and is placed outside the shell. A baffle is arranged on one end of the valve core pull rod. The first spring is sleeved on the valve core pull rod and abuts between the valve stem support seat and the baffle.

7. A decoupled multi-way valve manual operation structure according to claim 1, characterized in that: Both ends of the limiting sleeve are provided with recessed holes / cylindrical columns which cooperate with the end of the second spring for insertion and positioning, wherein one second spring sleeve is arranged on the valve core pull rod and abuts between the valve stem support seat and the limiting sleeve.

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