A speed regulating hydraulic lock

Abstract

The present invention discloses a speed-regulating hydraulic lock, which belongs to a hydraulic lock in the technical field of mechanical engineering. The technical scheme thereof comprises a valve body, a pipeline cavity and an adjusting component arranged in the valve body. The pipeline cavity comprises two reversing valve ports and two hydraulic actuator ports which are connected and arranged in the valve body. The adjusting component comprises a first one-way valve core component and a second one-way valve core component which are sequentially arranged at two ends of the valve body. A shuttle valve which can slide along the inside of the valve body is arranged between the first one-way valve core component and the second one-way valve core component. The two ends of the shuttle valve can be tightly attached to the first one-way valve core component or the second one-way valve core component at an adjacent end in turn to realize the opening of the speed-regulating pipeline inside the valve body. The present invention provides a speed-regulating hydraulic lock which can realize the working speed regulation of the hydraulic actuator and the speed-regulating hydraulic lock which maintains the stop state.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to a speed regulating hydraulic lock. Background Art

[0002] During the operation of hydraulic actuators (hydraulic cylinders, hydraulic motors, etc.), the speed (linear speed or rotational speed) of the hydraulic actuators can be controlled by adjusting the flow rate of the oil entering (or exiting) the actuators. In hydraulic systems, throttle valves or one-way throttle valves are generally used to adjust the speed of hydraulic actuators. After the hydraulic actuator drives the actuator to move to the required state, the hydraulic system stops supplying oil to the hydraulic actuator. At this time, the hydraulic actuator and the actuator need to maintain this state. To maintain this state, a set of hydraulic locks (essentially two hydraulically controlled one-way valves) needs to be installed at the inlet and outlet of the hydraulic actuator to prevent the discharge of oil.

[0003] In order to control the working speed and stop state of the hydraulic actuator, the above two valves must be used. In general, the working speed and stop state of the hydraulic actuator also need to be controlled. The usual solution is to use a throttle valve and a hydraulic lock to complete the control of the hydraulic actuator working speed adjustment and stop state maintenance. To combine the two separate hydraulic valves, the throttle valve and the hydraulic lock, they need to be connected together with pipes (or valve islands), which will increase the volume of the structural parts. The increase in pipes also increases the probability of oil leakage, the probability of hydraulic lock failure, and the safety risk. Therefore, a new type of hydraulic valve is needed to replace the above two hydraulic valves. Summary of the invention

[0004] The object of the present invention is to provide a speed regulating hydraulic lock which can realize the working speed regulation and the stopping state maintenance of the hydraulic actuator.

[0005] The objective of the present invention is achieved in the following way: the present invention comprises a valve body, a pipeline cavity and an adjusting component arranged in the valve body, the pipeline cavity comprising two reversing valve ports and two hydraulic actuator ports connected and arranged in the valve body, the adjusting component comprising a first one-way valve core component and a second one-way valve core component arranged in sequence at two ends of the valve body, a shuttle valve which can slide along the inside of the valve body is arranged between the first one-way valve core component and the second one-way valve core component, the two ends of the shuttle valve can be tightly attached to the first one-way valve core component or the second one-way valve core component at an adjacent end in turn to realize the opening of the speed regulating pipeline inside the valve body.

[0006] The beneficial effects of the present invention are embodied in:

[0007] 1. In the present invention, the functions of the speed regulating valve and the hydraulic lock are integrated into one valve to form a new hydraulic valve; it has the functions of the speed regulating valve and the hydraulic lock at the same time, and its volume and mass are only equivalent to those of the hydraulic lock of the same specification. Due to the reduction in volume and mass, it is more convenient to install on equipment, especially on engineering machinery equipment with compact structure, and has a wider application prospect; it reduces the hydraulic components and pipelines in the previous solutions, reduces the risk of oil leakage, and enhances the safety of the equipment.

[0008] 2. In the present invention, blind holes are provided at both ends of the shuttle valve. When the shuttle valve is pushed into the throttling adjusting rod, the oil in the blind hole is discharged through the gap between the blind hole and the throttling adjusting rod, which will provide a certain buffering effect when the shuttle valve moves and will not produce a large impact. This buffering effect will also be reflected on the hydraulic actuator, and buffering will also be generated during the start and stop process of the hydraulic actuator. This buffering effect is beneficial to the hydraulic element and is conducive to increasing the service life of the hydraulic element.

[0009] 3. In the present invention, the throttling adjustment rod is installed on the end cover by means of a threaded connection, and its position is adjusted through the wrench hole at the tail, so that the distance between the valve core sleeve and the valve seat can be adjusted arbitrarily from zero to the maximum. The smaller the pitch of the connecting thread, the higher the adjustment accuracy.

[0010] 4. In the present invention, a locking nut is installed on the throttling adjustment rod, which can prevent the throttling adjustment rod from loosening.

[0011] 5. In the present invention, a retaining ring is installed on the throttling adjustment rod, which limits the maximum screw-in depth of the throttling adjustment rod, and can prevent the seal on the throttling adjustment rod from falling off the end cover, causing oil leakage. When the throttling adjustment rods at both ends are screwed in to the maximum, the oil circuit can be completely locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0013] Figure 1 This is a schematic diagram of the internal structure of the hydraulic lock of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the adjustment component of the present invention inside the hydraulic lock;

[0015] Figure 3 It is a structural schematic diagram of the hydraulic cylinder, hydraulic pump, oil tank and valve body connected to each other in the present invention.

[0016] In the accompanying drawings, 1-valve body, 2-pipeline cavity, 3-adjusting assembly, 4-reversing valve port, 5-hydraulic actuator port, 6-first one-way valve core assembly, 7-second one-way valve core assembly, 8-shuttle valve, 9-speed control pipeline, 10-first reversing valve port, 11-second reversing valve port, 12-first hydraulic actuator port, 13-second hydraulic actuator port, 14-valve seat, 15-end cover, 16-throttling adjustment rod, 17-locking nut, 18-valve core sleeve, 19-flow channel through hole, 20-slider, 21-spring, 22-sliding valve body, 23-first push end, 24-second push end, 25-blind hole, 26-retaining ring, 27-sealing gasket, 28-reversing valve, 29-hydraulic pump, 30-oil tank, 31-hydraulic cylinder. DETAILED DESCRIPTION

[0017] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0018] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0019] A speed regulating hydraulic lock, comprising a valve body 1, a pipeline cavity 2 and an adjusting component 3 arranged in the valve body 1, wherein the pipeline cavity 2 comprises two reversing valve ports 4 and two hydraulic actuator ports 5 which are arranged in communication with the valve body 1, wherein the adjusting component 3 comprises a first one-way valve core component 6 and a second one-way valve core component 7 which are sequentially arranged at two ends inside the valve body 1, wherein a shuttle valve 8 which can slide along the inside of the valve body 1 is arranged between the first one-way valve core component 6 and the second one-way valve core component 7, wherein the two ends of the shuttle valve 8 can be pressed tightly against the first one-way valve core component 6 or the second one-way valve core component 7 at one adjacent end in turn, thereby realizing the opening of a speed regulating pipeline 9 inside the valve body 1;

[0020] When the first reversing valve port 10 and the second reversing valve port 11 of the valve body are connected to the oil tank at the same time, the first hydraulic actuator port 12 and the second hydraulic actuator port 13 respectively press the valve core sleeve onto the valve seat through oil pressure and spring force, preventing the oil in the first hydraulic actuator port 12 and the second hydraulic actuator port 13 from entering the first reversing valve port 10 and the second reversing valve port 11, thereby realizing the function of the hydraulic lock.

[0021] When the first reversing valve port 10 is connected to the oil pump and the second reversing valve port 11 is connected to the oil tank, the oil pressure of the first reversing valve port 10 pushes open the left end valve core sleeve 18, and the oil freely enters the first hydraulic actuator port 12 from the first reversing valve port 10. At the same time, the oil pressure pushes the shuttle valve and the right end valve core sleeve to move to the right until the shuttle valve contacts the right end throttling adjustment rod 16. At this time, the oil in the second hydraulic actuator port 13 passes through the gap between the valve core sleeve and the valve seat (the speed control pipeline 9 on the right) back to the second reversing valve port 11. The speed control pipeline is adjusted by thread. The second reversing valve port 11 is connected to the oil pump, and the first reversing valve port 10 is connected to the oil tank. The principle is the same, thereby realizing the speed regulation function.

[0022] Therefore, the speed regulating pipeline between the first one-way valve core assembly 6 and the valve body 1, and the speed regulating pipeline between the second one-way valve core assembly 7 and the valve body 1 are controlled. The functional control of the speed regulation is achieved through the cooperation of the second one-way valve core assembly 7 and the first one-way valve core assembly 6 in the valve body 1.

[0023] The two reversing valve ports 4 include a first reversing valve port 10 and a second reversing valve port 11 arranged on the same side of the valve body 1, and the first reversing valve port 10 and the second reversing valve port 11 are both connected to the interior of the valve body 1 through an oil pipe; the two hydraulic actuator ports 5 include a first hydraulic actuator port 12 and a second hydraulic actuator port 13 arranged on the other same side of the valve body 1, and the first hydraulic actuator port 12 and the second hydraulic actuator port 13 are both connected to the interior of the valve body 1 through an oil pipe.

[0024] The first one-way valve core assembly 6 and the second one-way valve core assembly 7 each include a valve seat 14 arranged at the end of the valve body 1, an end cover 15 arranged in the valve seat 14, and a throttling adjustment rod 16 threadedly connected to the end cover 15 and passing through the end cover 15 and the valve seat 14 in sequence; the throttling adjustment rod 16 is provided with a locking nut 17 at one end placed outside the valve body 1; the left end throttling adjustment rod 16 and the right end throttling adjustment rod 16 are locked by the locking nut 17 after the positions are adjusted, so as to prevent the left end throttling adjustment rod 16 and the right end throttling adjustment rod 16 from loosening.

[0025] The first one-way valve core assembly 6 and the second one-way valve core assembly 7 also include a valve core sleeve 18, which is sleeved on one end of the throttling adjustment rod 16 placed in the valve body 1 and is sleeved in the valve seat 14; the valve seat 14 and the valve core sleeve 18 are both provided with a flow channel through hole 19, and the throttling adjustment rod 16 placed in the valve body 1 part is provided with a slider 20, and the slider 20 is sleeved in the end cover 15, and a spring 21 is provided between the slider 20 and the valve core sleeve 18, and the spring 21 is sleeved on the outside of the throttling adjustment rod 16; by providing the spring 21 between the slider 20 and the valve core sleeve 18, the valve core sleeve 18 has a restoring force after the throttling adjustment rod 16 is pressed to move left and right by the shuttle valve 8 and separated from the throttling adjustment rod 16, thereby realizing the closing adjustment of the speed control pipeline 9.

[0026] The shuttle valve 8 includes a sliding valve body 22, a first pushing end 23 and a second pushing end 24 arranged at the ends of the sliding valve body 22 in sequence, and the ends of the first pushing end 23 and the second pushing end 24 are both provided with blind holes 25 adapted to the ends of the throttling adjustment rod 16; when the oil pressure pushes the shuttle valve 8 to move, the oil in the blind holes 25 at both ends of the shuttle valve 8 is discharged through the gaps between the blind holes 25 and the throttling adjustment rod 16 and the right throttling adjustment rod 16, thereby buffering the movement of the shuttle valve 8. This process reduces the impact of the shuttle valve 8 on the left valve core sleeve and the right valve core sleeve.

[0027] The end of the throttling adjustment rod 16 provided with the locking nut 17 is provided with a retaining ring 26, and the retaining ring 26 is fixedly sleeved on the throttling adjustment rod 16; it can prevent the left end throttling adjustment rod 16 and the right end throttling adjustment rod 16 from being screwed in too much, and prevent the left end throttling adjustment rod 16 and the right end throttling adjustment rod 16 from coming out of the left end cover 15 and the right end cover 15; it limits the maximum screwing depth of the throttling adjustment rod 16, and can prevent the seal on the throttling adjustment rod 16 from coming out of the end cover 15, causing oil leakage. When the throttling adjustment rods 16 at both ends are screwed in to the maximum, the oil circuit can be completely locked.

[0028] The flow channel holes 19 in the valve seat 14 and the valve core sleeve 18 are both arranged along the diameter direction of the valve seat 14 and the valve core sleeve 18; the flow channel holes 19 in the valve seat 14 and the valve core sleeve 18 provide communication between the two reversing valve ports 4 and the two hydraulic actuator ports 5 for the hydraulic oil inside the valve body 1, providing control conditions for the hydraulic oil control.

[0029] The end where the end cover 15 and the valve seat 14 are connected, and the end where the valve seat 14 and the valve body 1 are connected are both provided with sealing gaskets 27 , and the outer wall of the sliding valve body 22 is provided with sealing gaskets; the sealing gaskets can prevent oil leakage in the connecting parts.

[0030] The first one-way valve core assembly 6 and the second one-way valve core assembly 7 are symmetrically arranged inside the valve body 1 .

[0031] The first reversing valve port 10 and the second reversing valve port 11 are connected to a reversing valve 28 , the inlet end of the reversing valve 28 is connected to a hydraulic pump 29 , and the inlet end of the hydraulic pump 29 is connected to an oil tank 30 ; the two hydraulic actuator ports 5 are connected to a hydraulic cylinder 31 .

[0032] Working principle and working process of the present invention:

[0033] In the present invention, when the first reversing valve port 10 and the second reversing valve port 11 of the valve body 1 are connected to the oil tank at the same time, the first hydraulic actuator port 12 and the second hydraulic actuator port 13 respectively press the valve core sleeve onto the valve seat 14 through oil pressure and spring force, preventing the oil in the first hydraulic actuator port 12 and the second hydraulic actuator port 13 from entering the first reversing valve port 10 and the second reversing valve port 11, thereby realizing the function of the hydraulic lock;

[0034] When the first reversing valve port 10 is connected to the oil pump and the second reversing valve port 11 is connected to the oil tank, the oil pressure of the first reversing valve port 10 pushes open the left end valve core sleeve 18, and the oil freely enters the first hydraulic actuator port 12 from the first reversing valve port 10. At the same time, the oil pressure pushes the shuttle valve 8 and the right end valve core sleeve 18 to move rightward until the shuttle valve 8 contacts the right end throttling adjustment rod 16. At this time, the oil of the second hydraulic actuator port 13 passes through the gap between the valve core sleeve 18 and the valve seat 14 (the speed regulating pipeline 9 on the right side) and returns to the second reversing valve port 11. The speed regulating pipeline 9 is adjusted by thread.

[0035] Similarly, when the second reversing valve port 11 is connected to the oil pump and the first reversing valve port 10 is connected to the oil tank, the principle is the same, thereby realizing the speed regulation function.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A speed regulating hydraulic lock, comprising a valve body (1), a pipeline cavity (2) and an adjusting component (3) arranged in the valve body (1), characterized in that: The pipeline cavity (2) comprises two reversing valve ports (4) and two hydraulic actuator ports (5) which are arranged in communication with the valve body (1); the two reversing valve ports (4) comprise a first reversing valve port (10) and a second reversing valve port (11) which are arranged on the same side of the valve body (1); the two hydraulic actuator ports (5) comprise a first hydraulic actuator port (12) and a second hydraulic actuator port (13) which are arranged on the other side of the valve body (1); the first reversing valve port (10), the second reversing valve port (11), the first hydraulic actuator port (12) and the second hydraulic actuator port (13) are all connected by oil. The pipe is connected to the interior of the valve body (1); the regulating assembly (3) comprises a first one-way valve core assembly (6) and a second one-way valve core assembly (7) symmetrically arranged inside the valve body (1); a shuttle valve (8) which can slide along the interior of the valve body (1) is arranged between the first one-way valve core assembly (6) and the second one-way valve core assembly (7); the first one-way valve core assembly (6) and the second one-way valve core assembly (7) each comprise a valve seat (14) arranged at the end of the valve body (1) and extending into the valve body (1), an end cover (15) arranged at the end of the valve seat (14) and extending into the valve seat (14), and a valve core arranged in the end cover (15) and sleeved in the valve seat (14). The shuttle valve (14) is a valve core sleeve (18), a throttling regulating rod (16) threadedly connected to the end cover (15) and passing through the end cover (15), the valve core sleeve (18) and the valve seat (14) in sequence, the end of the valve core sleeve (18) can be fitted and corresponded with the inner edge of the end of the valve seat (14), and the valve core sleeve (18) and the throttling regulating rod (16) are sealed and slidably matched; the valve seat (14) and the valve core sleeve (18) are both provided with flow channel through holes (19) and can be connected or staggered, and the valve core sleeve (18) is provided with a spring (21) sleeved on the outside of the throttling regulating rod (16), and the two ends of the spring (21) are respectively supported on the end of the end cover (15) and the end wall inside the valve core sleeve (18); the shuttle valve (14) is provided with a spring (21) sleeved on the outside of the throttling regulating rod (16), and the two ends of the spring (21) are respectively supported on the end of the end cover (15) and the end wall inside the valve core sleeve (18); 8) comprises a sliding valve body (22) and a first pushing end head (23) and a second pushing end head (24) arranged at both ends of the sliding valve body (22); the ends of the first pushing end head (23) and the second pushing end head (24) are both provided with a blind hole (25) adapted to the end of the throttling adjustment rod (16); the gap between the valve core sleeve (18) and the valve seat (14) is the speed regulating pipeline (9); the blind holes (25) at both ends of the shuttle valve (8) are slidably matched with the gap of the throttling adjustment rod (16) and can be pressed tightly against the valve core sleeve (18) by the first pushing end head (23) or the second pushing end head (24), so as to realize the opening of the speed regulating pipeline (9) on the corresponding side.

2. The speed regulating hydraulic lock according to claim 1, characterized in that: The end of the throttling adjustment rod (16) located outside the valve body (1) is provided with a locking nut (17).

3. The speed regulating hydraulic lock according to claim 1, characterized in that: A slider (20) which is sleeved in the end cover (15) is arranged on the throttling adjustment rod (16) in the end cover (15).

4. The speed regulating hydraulic lock according to claim 1, characterized in that: The end of the locking nut (17) of the throttling adjustment rod (16) is provided with a retaining ring (26) fixedly sleeved on the throttling adjustment rod (16).

5. The speed regulating hydraulic lock according to claim 1, characterized in that: The flow channel through holes (19) of the valve seat (14) and the valve core sleeve (18) are both arranged along the diameter direction of the valve seat (14) and the valve core sleeve (18).

6. The speed regulating hydraulic lock according to claim 1, characterized in that: The end where the end cover (15) and the valve seat (14) are connected, and the end where the valve seat (14) and the valve body (1) are connected are both provided with sealing gaskets (27), and the outer wall of the sliding valve body (22) is provided with a sealing gasket (27).

7. The speed regulating hydraulic lock according to claim 1, characterized in that: The first reversing valve port (10) and the second reversing valve port (11) are connected to an outlet end of the reversing valve (28), the inlet end of the reversing valve (28) is connected to an outlet end of a hydraulic pump (29), and the inlet end of the hydraulic pump (29) is connected to an oil tank (30); the two hydraulic actuator ports (5) are connected to a hydraulic cylinder (31).

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