CN110439872B - Tubular hydraulic lock - Google Patents
Tubular hydraulic lock Download PDFInfo
- Publication number
- CN110439872B CN110439872B CN201910765799.6A CN201910765799A CN110439872B CN 110439872 B CN110439872 B CN 110439872B CN 201910765799 A CN201910765799 A CN 201910765799A CN 110439872 B CN110439872 B CN 110439872B
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- plunger
- valve
- valve body
- port
- flow passage
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- 239000003921 oil Substances 0.000 claims abstract description 79
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 230000009471 action Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a tubular hydraulic lock, which comprises a first valve body, a second spring, a one-way valve assembly arranged in the second valve body and a plunger arranged in the first valve body, wherein a control oil way which can enable hydraulic oil in the first valve body to act on the side wall surface of an annular convex part of the plunger body to drive the plunger to move backwards is formed on the first valve body or between the outer wall surface of the plunger body and the inner wall surface of a first flow passage, the control oil way is communicated with a control oil port, and when the plunger moves backwards, the plunger rod can drive a valve core to move backwards to open a valve port; the plunger is also provided with a first hollow runner which is penetrated in the front and back directions in the axial direction, the front port of the first hollow runner is correspondingly communicated with the oil inlet of the first valve body, and the rear port of the first hollow runner is correspondingly communicated with the valve port of the second valve body. The tubular hydraulic lock with the structure has the advantages of small volume and compact structure, and meets the practical installation requirement better.
Description
Technical Field
The invention relates to the technical field of hydraulic control devices, in particular to a tubular hydraulic lock.
Background
The hydraulic lock is a device which has a locking function in an oil way of a hydraulic cylinder, can reliably stop a heavy object and an executing mechanism at any position required by work, has a locking and pressure maintaining function, and ensures the safe and reliable work of a host. The existing hydraulic locks are divided into unidirectional hydraulic locks (hydraulic control one-way valves) and bidirectional hydraulic locks, such as a novel bidirectional hydraulic lock valve set with the application number of CN201420415539.9 (the grant notice number of CN 204003701U) and a bidirectional hydraulic lock with the application number of CN201520244513.7 (the grant notice number of CN 204729374U) and other patent documents, which disclose the hydraulic lock structure. However, whether it is a unidirectional hydraulic lock or a bidirectional hydraulic lock, the volume of the valve body is large, and when the hydraulic lock is installed, the occupied space is large, and how to provide a hydraulic lock which is small in volume and compact in structure and can effectively save the installation space is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydraulic lock which is small in size and compact in structure and can effectively save the installation space.
The technical scheme adopted for solving the technical problems is as follows: a tubular hydraulic lock comprising:
the first valve body is designed into a tubular body with a first flow passage which axially penetrates through the first valve body back and forth, the first valve body is provided with a control oil port, the front port of the first flow passage forms an oil inlet for medium to enter, and the rear port of the first flow passage forms a connecting port;
the front end of the second valve body is assembled on the connecting port of the first valve body, the rear port of the valve cavity forms an oil outlet for medium to flow out, and the front port of the valve cavity forms a valve port correspondingly communicated with the first flow channel;
the one-way valve assembly is arranged in the valve cavity of the second valve body and comprises a valve core, a spring seat and a first spring, wherein the valve core can be movably arranged in the valve cavity back and forth, the spring seat is positioned behind the valve core, the first spring is arranged between the valve core and the spring seat, and the valve core always has a trend of moving forwards to close the valve port of the second valve body under the action of the first spring;
the plunger is axially movably arranged in the first flow channel forwards and backwards and comprises a plunger body with an annular convex part formed on the outer peripheral wall of the rear end of the plunger body and a plunger rod extending backwards from the rear end of the plunger body, and the front end and the rear end of the plunger body are in sealing fit with the inner wall of the first flow channel;
a second spring abutting between the rear end of the plunger and the front end of the second valve body, so that the plunger always has a tendency to move forward to disengage the plunger rod from the valve core;
a control oil way which can act on the end face of the annular convex part of the plunger body to drive the plunger to move backwards is formed on the first valve body or between the outer wall surface of the plunger body and the inner wall surface of the first flow channel, the control oil way is communicated with the control oil port, and when the plunger moves backwards, the plunger rod can drive the valve core to move backwards to open the valve port;
the plunger is also provided with a first hollow runner which is penetrated in the front and back directions in the axial direction, the front port of the first hollow runner is correspondingly communicated with the oil inlet of the first valve body, and the rear port of the first hollow runner is correspondingly communicated with the valve port of the second valve body.
In order to reduce stress concentration, the strength of the joint of the plunger body and the plunger rod is increased, the rear end of the plunger body is provided with a spherical crown surface protruding backwards, and a plurality of plunger holes communicated with the first hollow flow passage are formed in the spherical crown surface; the plunger rod is positioned in the middle of the spherical crown surface, and the plunger holes are uniformly arranged on the outer side of the root part of the plunger rod.
In order to effectively drive the plunger to move backwards, a first stepped hole and a second stepped hole are sequentially formed in the inner wall of the first runner from front to back, so that a small runner at the front, a middle runner at the middle and a large runner at the rear are formed, wherein the outer peripheral wall of the front end of the plunger is in sealing fit with the inner wall of the small runner, the outer peripheral wall of the annular convex part of the plunger is in sealing fit with the inner wall of the large runner, an annular gap is reserved between the plunger and the inner wall of the middle runner, and the annular gap is correspondingly communicated with the control oil port to form the control oil path; the front end face of the annular protruding portion of the plunger is abutted against a first step portion formed between the large flow passage and the middle flow passage.
The control oil way is arranged at the side part of the plunger, so that space can be vacated for arranging the first hollow runner inside the plunger, and the structure of the hydraulic lock is more compact. The inner wall of the first runner is sequentially provided with the first stepped hole and the second stepped hole from front to back, so that the plunger forms different hydraulic stress surfaces at the front end and the rear end, and when control oil is introduced into the control oil way, the plunger can be driven to move backwards. It is conceivable that the control oil passage may be a flow passage structure in which the oil outlet port is located on the first step portion and can directly act on the front end surface of the annular projection.
In order to effectively seal the front end and the rear end of the plunger and avoid oil leakage, a first sealing ring is arranged between the outer peripheral wall of the front end of the plunger and the inner wall of the small flow passage of the first valve body, and a second sealing ring is arranged between the outer peripheral wall of the annular protruding part of the plunger and the inner wall of the large flow passage of the first valve body.
In order to effectively fix the second spring, the plunger can stably move forwards and backwards, a first positioning groove used for positioning the first end of the second spring is formed in the rear end of the plunger, a second positioning groove used for positioning the second end of the second spring is formed in the front end of the second valve body, and the plunger rod can penetrate through the second spring and abuts against the valve core.
As an improvement, the spring seat is screwed at the rear port of the valve chamber. When the spring seat is shifted to different positions, the valve core can be at different opening pressures, and the valve core is suitable for different working conditions.
In order to convey hydraulic oil to the oil outlet position on the second valve body, a valve port on the second valve body is of a shrinkage cavity structure, and the front end of the valve core is of a cone structure which is in sealing fit with the shrinkage cavity structure; the valve core is provided with a second hollow flow passage which is penetrated axially forwards and backwards, a stepped part with a reduced diameter is further formed on the peripheral wall of the front section of the valve core, an overflow gap is formed between the stepped part and the inner wall of the valve cavity, and an overflow hole which is communicated with the overflow gap and the second hollow flow passage is further formed on the stepped part; the spring seat is also provided with a liquid outlet pore canal which is used for communicating the second hollow flow passage and the oil outlet. The second hollow flow passage is formed in the valve core, so that the space structure of the valve core is reasonably utilized, and the volume of the hydraulic lock can be smaller and more compact.
In order to position the front end and the rear end of the first spring, the second hollow runner is a third stepped hole with a small front part and a big rear part, the front end of the first spring is abutted on a third stepped part formed in the third stepped hole, and the rear end of the first spring is abutted in a third positioning groove correspondingly arranged on the side wall of the front end of the spring seat. The front end of the first spring is accommodated in the third stepped hole, so that the volume of the hydraulic lock can be further reduced.
In order to facilitate connection of the first valve body and the second valve body and ensure tightness between the first valve body and the second valve body, the front end of the second valve body stretches into the connecting port of the first valve body and is connected with the connecting port of the first valve body through threads, and a third sealing ring is further arranged between the front end of the second valve body and the connecting port of the first valve body. The plunger and the second spring may be fitted between the first valve body and the second valve body through the connection port of the first valve body.
In order to be conveniently connected with an external control oil pipe, the control oil port is arranged on the side wall of the first valve body.
Compared with the prior art, the invention has the advantages that: the hydraulic lock is in a tubular shape as a whole, and is different from the prior art in that the front end of the tubular hydraulic lock is an oil inlet, the rear end of the tubular hydraulic lock is an oil outlet, a first hollow runner which is penetrated in the front and rear directions in the axial direction is arranged in a plunger, hydraulic oil can enter from the oil inlet at the front end during oil supply, then flows out from the oil outlet at the rear end through the first hollow runner of the plunger and a one-way valve assembly, and when oil return is needed, the plunger can move backwards to open the one-way valve under the action of a control oil way, so that the hydraulic oil returns along the original path. The tubular hydraulic lock with the structure has the advantages of small volume and compact structure, and meets the practical installation requirement better.
Drawings
FIG. 1 is a schematic view of a tubular hydraulic lock according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first valve body of a tubular hydraulic lock according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second valve body of a tubular hydraulic lock according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of a plunger of a tubular hydraulic lock according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of a tubular hydraulic lock second valve body mated with a check valve assembly according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a spool of a tubular hydraulic lock according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Referring to fig. 1 to 6, a pipe type hydraulic lock includes a first valve body 10, a second valve body 20, a second spring 43, a check valve assembly, and a plunger 40, wherein the first valve body 10 and the second valve body 20 are each designed as a pipe body, and a front end of the second valve body 20 is connected to a rear end of the first valve body 10 so that the whole of the hydraulic lock is pipe-shaped, specifically, the first valve body 10 has a first flow passage 100 penetrating axially forward and backward, and the second valve body 20 has a valve cavity 200 penetrating axially forward and backward, and the first flow passage 100 is substantially in alignment with the valve cavity 200 when the second valve body 20 is assembled to the first valve body 10.
Referring to fig. 1 and 2, the first valve body 10 is provided with a control oil port P, an oil inlet V and a connection port 101 for assembling the second valve body 20, wherein the front end of the second valve body 20 extends into the connection port 101 of the first valve body 10 and is connected with the connection port 101 of the first valve body 10 through threads, and a third sealing ring 11 is further arranged between the front end of the second valve body 20 and the connection port 101 of the first valve body 10. The control oil port P is located on a side wall of the first valve body 10, so as to be convenient for connection with an oil pipe (not shown) of an external control oil power source, the oil inlet V is located at a front end of the first valve body 10, and is specifically formed by a front port of the first flow channel 100, and the connection port 101 is located at a rear end of the first valve body 10, and is specifically formed by a rear port of the first flow channel 100, as shown in fig. 2 in detail.
The second valve body 20 is provided with a valve port 201 and an oil outlet C, wherein the valve port 201 is positioned at the front end of the second valve body 20, and is specifically formed by a front port of the valve cavity 200, and the oil outlet C is positioned at the rear end of the second valve body 20, and is specifically formed by a rear port of the valve cavity 200, as shown in fig. 3 in detail.
Referring to fig. 5, the check valve assembly is disposed in the valve cavity 200 of the second valve body 20, and specifically includes a valve core 31, a spring seat 32, and a first spring 33 disposed therebetween, where the valve core 31 is disposed at the front portion of the valve cavity 200, and the head portion thereof is a cone structure 311, and accordingly, the valve port 201 of the second valve body 20 is a shrinkage cavity structure, and the cone structure 311 can be sealingly engaged with the shrinkage cavity structure of the valve port 201, thereby forming a control port structure capable of opening or closing the valve port 201.
Referring to fig. 5 and 6, the valve core 31 has a second hollow flow passage 34 penetrating axially forward and backward, a stepped portion 35 with a reduced diameter is formed on the outer peripheral wall of the front section of the valve core 31, an overflow gap 350 is formed between the stepped portion 35 and the inner wall of the valve cavity 200 (see fig. 5 in detail), an overflow hole 36 connected with the overflow gap 350 and the second hollow flow passage 34 is further formed on the stepped portion 35, and a liquid outlet hole 320 (see fig. 5 in detail) for communicating the second hollow flow passage 34 and the oil outlet C is further formed on the spring seat 32. When the valve core 31 moves backward to open the valve port 201, hydraulic oil can enter the through-flow gap 350, then enter the second hollow flow passage 34 through the through-flow hole 36 on the valve core 31, and finally flow out through the oil outlet C of the second valve body 20 through the liquid outlet duct 320 of the spring seat 32. The second hollow flow passage 34 is formed in the valve core 31, so that the space structure of the valve core 31 is reasonably utilized, and the volume of the hydraulic lock can be smaller and more compact.
Referring to fig. 5, in order to position the front and rear ends of the first spring 33, the second hollow flow passage 34 is a third stepped hole with a small front and a large rear, the front end of the first spring 33 abuts against a third stepped portion 340 formed in the third stepped hole, and the rear end of the first spring 33 abuts against a third positioning groove 321 provided on the front end side wall of the spring seat 32. The front and rear ends of the first spring 33 are respectively positioned in the third stepped hole and the third positioning groove 321, so that not only can the firm positioning of the first spring 33 be ensured, but also the volume of the hydraulic lock can be further reduced.
With continued reference to fig. 5, the rear end port of the valve cavity 200 of the second valve body 20 is provided with an internal thread, and the peripheral wall of the spring seat 32 is correspondingly provided with an external thread, and the matching structure of the threaded connection can enable the spring seat 32 to perform front-rear displacement adjustment relative to the second valve body 20 during assembly, when the spring seat 32 is shifted to different positions, the valve core 31 can be under different opening pressures, and is suitable for different working conditions.
Referring to fig. 1 and 4, the plunger 40 is movably disposed in the first flow passage 100 of the first valve body 10, and specifically includes a plunger body 41 having an annular protrusion 411 and a plunger rod 42 disposed at a rear end of the plunger body 41, where the plunger rod 42 is disposed at a rear end position of the plunger body 41 and extends backward, when the plunger 40 is driven by control oil to move backward, a top end of the plunger rod 42 can act on the valve core 31 in the second valve body 20 to drive the valve core 31 to displace backward so as to open the valve port 201, and correspondingly, a second spring 43 is disposed between a rear end of the plunger 40 and a front end of the second valve body 20, and when the control oil is cancelled, the plunger 40 can move forward and return under the action of the second spring 43, the plunger rod 42 can be separated from the valve core 31, and the valve core 31 moves forward to close the valve port 201 again. In order to effectively fix the second spring 43, the plunger 40 can stably move back and forth, the rear end of the plunger 40 is provided with a first positioning groove 48 for positioning the first end of the second spring 43, the front end of the second valve body 20 is provided with a second positioning groove 21 for positioning the second end of the second spring 43, and the plunger rod 42 can pass through the second spring 43 to abut against the valve core 31.
With continued reference to fig. 1 and 4, the plunger 40 is further provided with a first hollow flow passage 50 which is penetrated axially forward and backward, the front port of the first hollow flow passage 50 is correspondingly communicated with the oil inlet V of the first valve body 10, the rear port of the first hollow flow passage 50 is correspondingly communicated with the valve port 201 of the second valve body 20, and when hydraulic oil enters from the oil inlet V at the front end of the first valve body 10, the hydraulic oil can directly enter the valve cavity 200 of the second valve body 20 through the first hollow flow passage 50 of the plunger 40. Specifically, the rear end of the plunger body 41 has a spherical cap surface 412 (see fig. 4 in detail), and in this embodiment, the spherical cap surface 412 is preferably a hemispherical surface, and a plurality of plunger holes 44 communicating with the first hollow flow passage 50 are formed in the spherical cap surface 412 along the radial direction. Wherein, plunger rod 42 is located the middle part position of this spherical cap face 412, and each plunger hole 44 is evenly arranged in the outside of the root of plunger rod 42, and this structure setting can increase the intensity of plunger body 41 and plunger rod 42 junction in order to reduce stress concentration.
Referring to fig. 1 and 2, in order to facilitate oil return of hydraulic oil, the hydraulic lock needs to drive the plunger 40 to move backward by passing control oil to push the valve core 31 to open the valve port 201 of the second valve body 20, in this embodiment, the control oil path is disposed at the side portion of the plunger 40, specifically, a first stepped hole and a second stepped hole are sequentially disposed on the inner wall of the first flow path 100 from front to back, the two stepped holes enable the first flow path 100 to form a small flow path 100a located at the front, a middle flow path 100b located at the middle and a large flow path 100c located at the rear in the front-rear direction, wherein the outer peripheral wall of the front end of the plunger 40 is in sealing fit with the inner wall of the small flow path 100a through a first sealing ring 46, the outer peripheral wall of the first sealing ring 46 is disposed in a first annular groove 460 formed on the outer peripheral wall of the front end of the plunger 40, the outer peripheral wall of the annular convex portion 411 and the inner wall of the large flow path 100c are in sealing fit with each other through a second sealing ring 47, the second sealing ring 47 is disposed in a second annular groove 470 formed on the outer peripheral wall of the annular convex portion of the large flow path 100, and an annular gap 45 is left between the plunger 40 and the inner wall of the middle flow path 100b and the inner wall is located on the outer peripheral wall of the inner wall, and the inner wall is opposite annular wall, and the annular wall is formed.
Referring to fig. 4, an annular protrusion 411 is provided on the outer peripheral wall of the rear end of the plunger body 41, so that, on the one hand, control oil in the control oil passage can be made to act on the front end surface of the annular protrusion 411 to drive the plunger 40 to move rearward, and, on the other hand, the front end surface of the annular protrusion 411 of the plunger 40 can abut against the first step 102 formed between the large flow passage 100c and the medium flow passage 100b under the action of the second spring 43 to limit the plunger 40 in the axial direction.
Referring to fig. 1, the control oil path is disposed at the side of the plunger 40, so that a space can be made for the first hollow flow passage 50 to be opened inside the plunger 40, so that the structure of the hydraulic lock is more compact. The inner wall of the first flow channel 100 is sequentially provided with a first stepped hole and a second stepped hole from front to back, so that the plunger 40 can form different hydraulic stress surfaces at the front end and the rear end, and when control oil is introduced into a control oil path, the plunger 40 can be driven to move backwards. It is conceivable that the control oil passage may also be a flow passage structure whose oil outlet port is located on the first step portion 102 and can directly act on the front end surface of the annular convex portion 411.
The working principle and the working procedure of the tubular hydraulic lock in the embodiment are as follows:
hydraulic oil enters from an oil inlet V of the first valve body 10, then flows out from a plunger hole 44 through a first hollow flow passage 50 in the plunger 40, and under the pressure of the hydraulic oil, the valve core 31 of the one-way valve assembly moves backwards to open the valve port 201 of the second valve body 20, the hydraulic oil enters into the valve cavity 200 from the valve port 201 and flows out from the oil outlet C of the second valve body 20 through an outlet duct 320 of the spring seat 32 to reach an actuating mechanism; after the oil is fed, the control oil port P is not fed with control oil, and the valve core 31 of the check valve assembly moves forward under the action of the first spring 33 and is in a sealing state with the valve port 201, so that the actuator can maintain a locking state. When oil return is needed, control oil enters the control oil path from the control oil port P, the plunger 40 moves backwards under the pressure of the control oil, the plunger rod 42 pushes the valve core 31 of the one-way valve assembly to open the valve port 201, and at the moment, hydraulic oil can sequentially pass through the liquid outlet pore canal 320 of the spring seat 32, the second hollow flow passage 34 and the overflow hole 36 of the valve core 31, the valve port 201 of the second valve body 20, the plunger hole 44 of the plunger 40 and the first hollow flow passage 50, and finally flows out from the oil inlet V of the first valve body 10 to finish the oil return process.
Claims (8)
1. A tubular hydraulic lock, comprising:
a first valve body (10) designed as a tubular body with a first flow passage (100) penetrating axially forward and backward, the first valve body (10) having a control oil port (P), the front port of the first flow passage (100) forming an oil inlet (V) for medium to enter, the rear port of the first flow passage (100) forming a connection port (101);
the second valve body (20) is designed into a tubular body with a valve cavity (200) penetrating axially forwards and backwards, the front end of the second valve body (20) is assembled on a connecting port (101) of the first valve body (10), the rear port of the valve cavity (200) forms an oil outlet (C) for medium to flow out, and the front port of the valve cavity (200) forms a valve port (201) correspondingly communicated with the first flow channel (100);
the check valve assembly is arranged in a valve cavity (200) of the second valve body (20) and comprises a valve core (31) which can be movably arranged in the valve cavity (200) back and forth, a spring seat (32) positioned behind the valve core (31) and a first spring (33) arranged between the valve core (31) and the spring seat (32), and under the action of the first spring (33), the valve core (31) always has a trend of moving forwards to close a valve port (201) of the second valve body (20);
the plunger (40) is axially movably arranged in the first flow channel (100) forwards and backwards and comprises a plunger body (41) with an annular convex part (411) formed on the outer peripheral wall of the rear end of the plunger body and a plunger rod (42) extending backwards from the rear end of the plunger body (41), and the front end and the rear end of the plunger body (41) are in sealing fit with the inner wall of the first flow channel (100);
a second spring (43) abutting between the rear end of the plunger (40) and the front end of the second valve body (20), causing the plunger (40) to always have a tendency to move forward to disengage the plunger rod (42) from the valve spool (31);
a control oil path which can enable hydraulic oil in the control oil path to act on the end face of the annular convex part (411) of the plunger body (41) to drive the plunger (40) to move backwards is formed on the first valve body (10) or between the outer wall surface of the plunger body (41) and the inner wall surface of the first flow channel (100), the control oil path is communicated with the control oil port (P), and when the plunger (40) moves backwards, the plunger rod (42) can drive the valve core (31) to move backwards to open the valve port (201);
the plunger (40) is also provided with a first hollow flow passage (50) which is penetrated in the axial direction front and back, the front port of the first hollow flow passage (50) is correspondingly communicated with the oil inlet (V) of the first valve body (10), and the rear port of the first hollow flow passage (50) is correspondingly communicated with the valve port (201) of the second valve body (20);
the rear end of the plunger body (41) is provided with a spherical cap surface (412) protruding backwards, and a plurality of plunger holes (44) communicated with the first hollow flow passage (50) are formed in the spherical cap surface (412);
the plunger rod (42) is positioned in the middle of the spherical crown surface (412), and each plunger hole (44) is uniformly arranged outside the root part of the plunger rod (42);
the inner wall of the first flow channel (100) is sequentially provided with a first stepped hole and a second stepped hole from front to back so as to form a small flow channel (100 a) at the front part, a middle flow channel (100 b) at the middle part and a large flow channel (100 c) at the rear part, wherein the outer peripheral wall of the front end of the plunger (40) is in sealing fit with the inner wall of the small flow channel (100 a), the outer peripheral wall of an annular convex part (411) of the plunger (40) is in sealing fit with the inner wall of the large flow channel (100 c), an annular gap (45) is reserved between the plunger (40) and the inner wall of the middle flow channel (100 b), and the annular gap (45) is correspondingly communicated with the control oil port (P) so as to form the control oil channel;
the front end surface of the annular convex part (411) of the plunger (40) is abutted against a first step part (102) formed between the large flow passage (100 c) and the middle flow passage (100 b).
2. The tubular hydraulic lock of claim 1 wherein: a first sealing ring (46) is arranged between the outer peripheral wall of the front end of the plunger (40) and the inner wall of the small flow passage (100 a) of the first valve body (10), and a second sealing ring (47) is arranged between the outer peripheral wall of the annular protruding part (411) of the plunger (40) and the inner wall of the large flow passage (100 c) of the first valve body (10).
3. The tubular hydraulic lock of claim 1 wherein: the rear end of the plunger (40) is provided with a first positioning groove (48) for positioning the first end of the second spring (43), the front end of the second valve body (20) is provided with a second positioning groove (21) for positioning the second end of the second spring (43), and the plunger rod (42) can penetrate through the second spring (43) to prop against the valve core (31).
4. The tubular hydraulic lock of claim 1 wherein: the spring seat (32) is threadedly connected at a rear port of the valve chamber (200).
5. The tubular hydraulic lock of any one of claims 1-4 wherein: the valve port (201) on the second valve body (20) is of a shrinkage cavity structure, and the front end of the valve core (31) is of a cone structure (311) which is in sealing fit with the shrinkage cavity structure;
the valve core (31) is provided with a second hollow flow passage (34) which is penetrated in the axial direction forwards and backwards, a reduced-diameter step part (35) is further formed on the outer peripheral wall of the front section of the valve core (31), an overflow gap (350) is formed between the step part (35) and the inner wall of the valve cavity (200), and an overflow hole (36) which is communicated with the overflow gap (350) and the second hollow flow passage (34) is further formed on the step part (35);
the spring seat (32) is also provided with a liquid outlet duct (320) for communicating the second hollow runner (34) and the oil outlet (C).
6. The tubular hydraulic lock of claim 5 wherein: the second hollow flow passage (34) is a third stepped hole with a small front part and a large rear part, the front end of the first spring (33) is abutted against a third stepped part (340) formed in the third stepped hole, and the rear end of the first spring (33) is abutted against a third positioning groove (321) correspondingly formed on the side wall of the front end of the spring seat (32).
7. The tubular hydraulic lock of claim 5 wherein: the front end of the second valve body (20) stretches into the connecting port (101) of the first valve body (10) and is connected with the connecting port through threads, and a third sealing ring (11) is further arranged between the front end of the second valve body (20) and the connecting port (101) of the first valve body (10).
8. The tubular hydraulic lock of any one of claims 1-4 wherein: the control oil port (P) is arranged on the side wall of the first valve body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765799.6A CN110439872B (en) | 2019-08-19 | 2019-08-19 | Tubular hydraulic lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765799.6A CN110439872B (en) | 2019-08-19 | 2019-08-19 | Tubular hydraulic lock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110439872A CN110439872A (en) | 2019-11-12 |
| CN110439872B true CN110439872B (en) | 2024-04-05 |
Family
ID=68436436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910765799.6A Active CN110439872B (en) | 2019-08-19 | 2019-08-19 | Tubular hydraulic lock |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213242A (en) * | 2011-07-19 | 2011-10-12 | 宁波克泰液压有限公司 | Thread plug-in type electronic control hydraulic lock |
| CN202132292U (en) * | 2011-07-19 | 2012-02-01 | 宁波克泰液压有限公司 | Threaded cartridge type electric control hydraulic lock |
| CN103470572A (en) * | 2013-09-10 | 2013-12-25 | 浙江苏强格液压股份有限公司 | Hydraulic lock assembly and bidirectional hydraulic lock comprising same |
| CN106195370A (en) * | 2016-08-13 | 2016-12-07 | 李军 | Cartridge balanced valve |
| CN108561355A (en) * | 2018-07-12 | 2018-09-21 | 宁波善研液压有限公司 | bidirectional hydraulic lock |
| CN210461218U (en) * | 2019-08-19 | 2020-05-05 | 宁波善研液压有限公司 | Tubular hydraulic lock |
-
2019
- 2019-08-19 CN CN201910765799.6A patent/CN110439872B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213242A (en) * | 2011-07-19 | 2011-10-12 | 宁波克泰液压有限公司 | Thread plug-in type electronic control hydraulic lock |
| CN202132292U (en) * | 2011-07-19 | 2012-02-01 | 宁波克泰液压有限公司 | Threaded cartridge type electric control hydraulic lock |
| CN103470572A (en) * | 2013-09-10 | 2013-12-25 | 浙江苏强格液压股份有限公司 | Hydraulic lock assembly and bidirectional hydraulic lock comprising same |
| CN106195370A (en) * | 2016-08-13 | 2016-12-07 | 李军 | Cartridge balanced valve |
| CN108561355A (en) * | 2018-07-12 | 2018-09-21 | 宁波善研液压有限公司 | bidirectional hydraulic lock |
| CN210461218U (en) * | 2019-08-19 | 2020-05-05 | 宁波善研液压有限公司 | Tubular hydraulic lock |
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| Publication number | Publication date |
|---|---|
| CN110439872A (en) | 2019-11-12 |
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