CN219865680U - Internal throttling bidirectional hydraulic lock - Google Patents
Internal throttling bidirectional hydraulic lock Download PDFInfo
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- CN219865680U CN219865680U CN202321241206.4U CN202321241206U CN219865680U CN 219865680 U CN219865680 U CN 219865680U CN 202321241206 U CN202321241206 U CN 202321241206U CN 219865680 U CN219865680 U CN 219865680U
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- throttling
- valve
- oil
- plunger
- valve seat
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 99
- 230000007935 neutral effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010724 circulating oil Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
An internal throttling bidirectional hydraulic lock comprises a lock body, wherein an oil inlet A, B and working ports A1 and B1 are respectively arranged on two sides of the lock body; the middle part of the mounting hole in the lock body is provided with a plunger, two sides of the plunger are symmetrically provided with one-way valves, and the oil inlet A, B is correspondingly communicated with the working ports A1 and B1 through corresponding one-way valves respectively; ejector rod sections are respectively arranged at two ends of the plunger; the method is characterized in that: and one side of the one-way valve on the plunger, which is correspondingly communicated with the working port A1, is provided with a throttling section, the throttling section is positioned on the inner side of the ejector rod section and corresponds to the oil inlet A, and the outer diameter of the throttling section is in small clearance fit with the central hole of the valve seat of the corresponding one-way valve and is used for inserting the corresponding one-way valve to realize throttling oil return. The beneficial effects are that: the hydraulic lock has the advantages that oil return throttling of the rodless cavity of the oil cylinder can be realized, instant pressure impact is avoided during oil return, the structure is simple and practical, the conception is ingenious, the external dimension is kept unchanged, the external dimension of the hydraulic lock used by the main machine is consistent, the main machine is convenient to assemble and maintain, and certain social benefit is achieved.
Description
Technical Field
The utility model relates to the field of hydraulic locks, in particular to an internal throttling bidirectional hydraulic lock.
Background
The bidirectional hydraulic lock is widely applied to crane supporting leg oil ways and engineering machinery needing to lock two cavities of a hydraulic cylinder and an oil inlet and return port of a motor, and the hydraulic principle is shown in figure 3. In practical application, the A, B port of the bidirectional hydraulic lock is respectively connected with the A port and the B port of the multi-way reversing valve, and the A1 port and the B1 port are respectively connected with the rodless cavity and the rod-containing cavity of the working oil cylinder. When the oil is fed into the port A, the oil enters a rodless cavity of the oil cylinder from the port A1 through the internal channel; meanwhile, a plunger in the bidirectional hydraulic lock is pushed to move towards the direction of the port B, and the lock cylinder at the port B is jacked up, so that oil in a rod cavity of the oil cylinder flows to the port B through the port B1 and an internal channel and returns to the oil tank through a multi-way reversing valve. When the multi-way reversing valve is in a neutral position, oil is fed back to the port A and the port B of the bidirectional hydraulic lock, the lock cylinders of the port A and the port B close the oil paths where the lock cylinders are positioned under the action of the return spring and the pressure oil, and the oil cylinders are locked in a certain position, and vice versa.
In the operation of a main machine, the common bidirectional hydraulic lock has the advantages that as the two cavities of the oil cylinder have a difference in area and the output flow of the oil pump is certain, when the oil is returned from the oil inlet A of the port B (namely the rod cavity of the oil cylinder), the piston rod of the oil cylinder is necessarily retracted rapidly; and because the opening pressure of the safety valve is not reached or the opening response speed is delayed, the instant pressure impact is caused, and instant shaking and noise are brought to the host; meanwhile, the purpose that the reciprocating speed of the oil cylinder is basically the same cannot be achieved.
In order to solve the above problems, a throttled two-way hydraulic lock has been designed. The hydraulic lock is provided with a one-way throttle valve inserted into the port A1, and the throttle valve consists of a throttle body and a throttle valve plate. When the oil is fed into the throttle valve plate from the opening A, the pressure oil pushes the three straight claws of the throttle valve plate to lean against the throttle valve body, and the pressure oil enters the rodless cavity of the oil cylinder through the opening A1 after passing through the small hole in the middle of the throttle valve plate and the three fan-shaped notches to the throttle valve body. When the oil cylinder returns oil from the rodless cavity, the throttle valve plate is pushed by the port A1 to lean against the inner bottom surface of the throttle valve mounting hole on the lock body, and the plane of the throttle valve plate seals the inner bottom surface of the lock body mounting hole, so that the pressure oil can only enter the oil duct in the lock body to the port A and the reversing valve return oil tank of the multi-way valve through the center small hole (damping hole) of the throttle valve plate.
The throttling bidirectional hydraulic lock has the advantages of reducing pressure impact, reducing shaking and noise and achieving the aim of basically the same reciprocating speed of the oil cylinder, but has the defects that a one-way throttle valve is added, so that the volume of the hydraulic lock is increased, the cost is increased and inconvenience is brought no matter the hydraulic lock is processed, installed and transported; in particular, if the throttle valve plate is punched, a large number of dies are needed, and if the throttle valve plate is manually manufactured, labor and time are wasted.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the internal throttling bidirectional hydraulic lock which has a simple structure, can realize oil return throttling of a rodless cavity of an oil cylinder, and avoids instant pressure impact during oil return.
In order to solve the problems, the utility model adopts the following technical scheme:
the inner throttling bidirectional hydraulic lock comprises a lock body, wherein two sides of the lock body are respectively provided with an oil inlet A, B and working ports A1 and B1, the oil inlet A, B is used for being connected with a multi-way reversing valve, and the working ports A1 and B1 are used for being connected with a rodless cavity and a rod-containing cavity of a working oil cylinder; the middle part of the mounting hole in the lock body is provided with a plunger, two sides of the plunger are symmetrically provided with one-way valves, and the oil inlet A, B is correspondingly communicated with the working ports A1 and B1 through corresponding one-way valves respectively; two ends of the plunger are respectively provided with a push rod section for pushing up the corresponding one-way valve; the special character is that: and one side of the check valve which is correspondingly communicated with the working port A1 on the plunger is provided with a throttling section, the throttling section is positioned at the inner side of the ejector rod section and corresponds to the oil inlet A, and the outer diameter of the throttling section is in small clearance fit with the central hole of the valve seat of the corresponding check valve and is used for inserting the corresponding check valve to realize throttling oil return.
As a further preferable mode, when the plunger pushes up the check valve corresponding to the working port A1 under the pushing of oil pressure, the throttling section is inserted into the central hole of the corresponding valve seat by 2mm, so that throttling oil return is realized.
As further preferable, the one-way valve comprises a valve seat, a valve core, a plug and a return spring, wherein the valve seat is inserted in the mounting hole in a sealing way and limited by the plug, the valve core is slidably mounted in the valve seat, the inner end of the valve core is a conical head and is propped against the inner step of the central hole under the action of the return spring, and the one-way stop is realized.
As a further preference, annular grooves are respectively arranged on the outer edge and the inner wall of the valve seat, the two annular grooves are arranged in a staggered manner and communicated through radial holes uniformly distributed on the valve seat along the circumferential direction, and the annular grooves positioned on the outer edge of the valve seat are respectively communicated with the working ports A1 and B1 correspondingly.
As a further preferable mode, radial small holes are uniformly distributed on the outer edge of the valve core along the circumferential direction, and an annular groove on the inner wall of the valve seat is communicated with the inner hole of the valve core through the radial small holes and is used for introducing pressure oil to assist a reset spring to reset the one-way valve.
The beneficial effects of the utility model are as follows:
1. through correspond intercommunication on the plunger check valve one side of working opening A1 is equipped with the throttle section, throttle section external diameter and the disk seat centre bore little clearance fit of corresponding check valve, alright realize hydro-cylinder rodless chamber oil return throttle, produce the pressure shock in the twinkling of an eye when avoiding the oil return, simple structure is practical, and the design is ingenious, has kept the overall dimension of ordinary two-way hydraulic lock unchanged, makes the used hydraulic lock appearance of host computer unanimous, has increased the pleasing to the eye of host computer, has made things convenient for the host computer equipment and has certain social.
2. The one-way throttle valve is not required to be assembled, parts of the throttle two-way hydraulic lock are reduced, the processing amount of the plunger is reduced, labor and time are saved, the manufacturing cost can be reduced, and the profit of a production enterprise is increased.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic diagram of the operation of fig. 1.
Fig. 3 is a schematic diagram of a conventional two-way hydraulic lock of the background art.
In the figure: the valve comprises a plug 1, a return spring 2, a valve core 3, a radial small hole 301, a valve seat 4, an annular groove 401, a radial hole 402, a plunger 5, a push rod section 501, a throttling section 502, a lock body 6 and a mounting hole 601.
Detailed Description
As shown in fig. 1-2, the utility model relates to an internal throttling bidirectional hydraulic lock, which comprises a lock body 6, wherein an oil inlet A and an oil inlet B are arranged on the lock body 6, a working port A1 and a working port B1 are arranged on the bottom surface of the lock body 6, the oil inlet A, B is used for respectively connecting the port A and the port B of a multi-way reversing valve, and the working ports A1 and B1 are used for respectively connecting a rodless cavity and a rod-containing cavity of a working oil cylinder.
The middle part of the mounting hole 601 in the lock body 6 is provided with a plunger 5 through sliding clearance fit, two sides of the plunger 5 are symmetrically provided with one-way valves, and the oil inlets A, B are correspondingly communicated with the working ports A1 and B1 through corresponding one-way valves respectively. Ejector rod sections 501 with different lengths are respectively arranged at two ends of the plunger 5 and are used for inserting and ejecting corresponding one-way valves.
And one side of the check valve which is correspondingly communicated with the working port A1 on the plunger 5 is provided with a throttling section 502, the throttling section 502 is positioned on the inner side of the ejector rod section 501 and corresponds to the oil inlet A, and the outer diameter of the throttling section 502 is in small clearance fit with the central hole of the valve seat 4 of the corresponding check valve and is used for inserting the corresponding check valve to realize throttling oil return. When the plunger 5 pushes up the check valve corresponding to the working port A1 under the pushing of oil pressure, the throttling section 502 is inserted into the corresponding valve seat center hole by 2mm, so that throttling oil return is realized.
The one-way valve comprises a valve seat 4, a valve core 3, a plug 1 and a return spring 2, wherein the valve seat 4 is inserted in the mounting hole 601 in a sealing way and is limited by the plug 1 which is arranged in an outer port of the mounting hole through threads, the valve core 3 is slidably arranged in the valve seat 4, the inner end of the valve core 3 is a conical head and is propped against an inner step of the central hole under the action of the return spring 2, and the one-way stop is realized. The outer edge and the inner wall of the valve seat 4 are respectively provided with an annular groove 401, the two annular grooves 401 are arranged in a staggered mode and are communicated through radial holes 402 uniformly distributed on the valve seat 4 along the circumferential direction, and the annular grooves 401 positioned on the outer edge of the valve seat 4 are respectively communicated with the working ports A1 and B1 correspondingly and are used for circulating oil.
Radial small holes 301 are uniformly distributed on the outer edge of the valve core 3 along the circumferential direction, and an annular groove 401 on the inner wall of the valve seat 4 is communicated with the inner hole of the valve core 3 through the radial small holes 301 and is used for introducing pressure oil to assist the reset spring 2 to realize the reset of the one-way valve.
In operation, when the multiple directional control valve connected to the oil inlet A, B is in the neutral position, the oil output from the oil pump returns to the oil tank through the neutral position of the multiple directional control valve. When the multi-way reversing valve is controlled to the left position, oil output by the oil pump enters the central hole of the valve seat 4 from the oil inlet A to the left one-way valve, the lock cylinder is opened, and the oil enters the rodless cavity of the working oil cylinder through the gap between the lock cylinder and the valve seat 4, the radial hole 402 of the valve seat and the annular groove to the working port A1. Meanwhile, the oil output by the oil pump pushes the plunger 5 to move to the right to the ejector rod section 501 to jack the right one-way valve, and oil in a rod cavity of the oil cylinder returns to the oil tank through the working port B1 and the right one-way valve and the multi-way reversing valve.
At this time, the piston rod of the working oil cylinder stretches out under the pushing of the pressure oil, and after the piston rod stretches out for a certain length to contact with the load, the multi-way reversing valve is controlled to return to the middle position, and the oil output by the oil pump returns to the oil tank through the middle position of the multi-way reversing valve. At the moment, the check valves at the two sides of the plunger 5 are reset and closed under the action of the reset spring 2 and the pressure oil, the pressure oil in two cavities of the working oil cylinder is locked, the bearing of the piston rod of the oil cylinder is stopped at the position, and the host can perform other working condition operations.
When the piston rod of the oil cylinder is required to retract after the operation is finished, the multi-way reversing valve is controlled to the right, oil output by the oil pump passes through the oil inlet B to the central hole of the valve seat 4, the lock cylinder is opened, and the oil enters a rod cavity of the oil cylinder through the one-way valve on the right side; meanwhile, oil output by the oil pump pushes the plunger 5 to move left, so that the plunger 5 pushes up a lock core of a left one-way valve, the throttling section 502 is inserted into a central hole of a corresponding valve seat 4 for 2mm, oil in a rodless cavity of the oil cylinder enters the left one-way valve of the plunger 5 through a working hole A1, and after the oil enters an annular gap between the central hole of the valve seat 4 and the throttling section of the plunger 5 to play a throttling damping role, the oil returns to the oil tank through a multi-way reversing valve, so that the piston rod of the oil cylinder is stably retracted to the original position under the pushing of pressure oil.
Then the multi-way reversing valve is controlled to return to the middle position, oil output by the oil pump returns to the oil tank through the multi-way reversing valve, at the moment, the two-side one-way valves are reset and propped against the central hole of the valve seat 4 under the action of the reset spring 2 and the pressure oil, the pressure oil in two cavities of the oil cylinder is locked, the piston rod of the oil cylinder is stopped at the original position, and the host can perform the next working condition or place operation.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (5)
1. The inner throttling bidirectional hydraulic lock comprises a lock body, wherein two sides of the lock body are respectively provided with an oil inlet A, B and working ports A1 and B1, the oil inlet A, B is used for being connected with a multi-way reversing valve, and the working ports A1 and B1 are used for being connected with a rodless cavity and a rod-containing cavity of a working oil cylinder; the middle part of the mounting hole in the lock body is provided with a plunger, two sides of the plunger are symmetrically provided with one-way valves, and the oil inlet A, B is correspondingly communicated with the working ports A1 and B1 through corresponding one-way valves respectively; two ends of the plunger are respectively provided with a push rod section for pushing up the corresponding one-way valve; the method is characterized in that: and one side of the check valve which is correspondingly communicated with the working port A1 on the plunger is provided with a throttling section, the throttling section is positioned at the inner side of the ejector rod section and corresponds to the oil inlet A, and the outer diameter of the throttling section is in small clearance fit with the central hole of the valve seat of the corresponding check valve and is used for inserting the corresponding check valve to realize throttling oil return.
2. The internal throttling bi-directional hydraulic lock according to claim 1, characterized in that: when the plunger pushes the check valve corresponding to the working port A1 to open under the pushing of oil pressure, the throttling section is inserted into the corresponding valve seat center hole by 2mm, so that throttling oil return is realized.
3. The internal throttle bi-directional hydraulic lock of claim 1 or 2, wherein: the one-way valve comprises a valve seat, a valve core, a plug and a reset spring, wherein the valve seat is inserted in the mounting hole in a sealing way and limited by the plug, the valve core is slidably mounted in the valve seat, the inner end of the valve core is a conical head and is propped against the inner step of the central hole under the action of the reset spring, and the one-way stop is realized.
4. An internal throttling bi-directional hydraulic lock according to claim 3, characterized in that: annular grooves are respectively arranged on the outer edge and the inner wall of the valve seat, the two annular grooves are arranged in a staggered mode and are communicated through radial holes uniformly distributed on the valve seat along the circumferential direction, and the annular grooves on the outer edge of the valve seat are respectively communicated with the working ports A1 and B1.
5. The internal throttling bi-directional hydraulic lock according to claim 4, wherein: radial small holes are uniformly distributed on the outer edge of the valve core along the circumferential direction, and an annular groove on the inner wall of the valve seat is communicated with the inner hole of the valve core through the radial small holes and is used for introducing pressure oil to assist a reset spring to reset the one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321241206.4U CN219865680U (en) | 2023-05-22 | 2023-05-22 | Internal throttling bidirectional hydraulic lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321241206.4U CN219865680U (en) | 2023-05-22 | 2023-05-22 | Internal throttling bidirectional hydraulic lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219865680U true CN219865680U (en) | 2023-10-20 |
Family
ID=88339973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321241206.4U Active CN219865680U (en) | 2023-05-22 | 2023-05-22 | Internal throttling bidirectional hydraulic lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219865680U (en) |
-
2023
- 2023-05-22 CN CN202321241206.4U patent/CN219865680U/en active Active
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| GR01 | Patent grant | ||
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