CN212899205U

CN212899205U - Rebound valve with low-pressure cut-off function

Info

Publication number: CN212899205U
Application number: CN202021705393.3U
Authority: CN
Inventors: 陈星星
Original assignee: Zhejiang Fangzhou Engineering Machinery Equipment Co ltd
Current assignee: Zhejiang Fangzhou Engineering Machinery Equipment Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-04-06
Anticipated expiration: 2030-08-17

Abstract

The utility model relates to a rebound valve with low pressure cuts function, which comprises a valve body, be provided with the runner in the valve body, be provided with in the valve body and open and close the subassembly, it includes first case to open and close the subassembly, first accuse pressure spring and second case, first case slides and sets up in the valve body, the runner is provided with the low pressure and cuts the mouth, first case is provided with and cuts the end, first accuse is pressed the spring compression and is set up between valve body and first case, the second case slides and sets up in the valve body, first case is located the both sides that the low pressure cut the mouth with the second case, the second case is provided with the opening end towards first case side, the valve body is located the second case and deviates from opening the distolateral accuse pressure port. Adopt above-mentioned scheme, provide a valve body and connect in series in hydraulic pressure lifting mechanism to through crossing at the oil pressure and the unable first case that promotes of second case, make first accuse pressure spring elasticity reset and realize cutting the end and seal the truncation mouth and prevent that the railway carriage from working under the low pressure drive and leading to the rebound valve of action out of control to have the low pressure to cut the function.

Description

Rebound valve with low-pressure cut-off function

Technical Field

The utility model relates to a railway carriage lifts protection technical field, concretely relates to rebound valve with low pressure cuts function.

Background

The self-discharging automobile is a special automobile which uses the power of an engine to drive a hydraulic lifting mechanism, inclines a carriage of the self-discharging automobile for discharging at a certain angle and resets the carriage by the self weight of the carriage, and the hydraulic lifting mechanism comprises an oil tank, a hydraulic pump, a distribution valve, a lifting hydraulic cylinder, a control valve, an oil pipe and the like. The engine drives the hydraulic pump through the speed changer and the power takeoff device, high-pressure oil enters the lifting hydraulic cylinder through the distribution valve and the oil pipe, the piston rod is pushed to enable the carriage to tip over, and the carriage is reset under the control of self gravity and hydraulic pressure.

The lifting acting force in the hydraulic lifting process is determined by the oil pressure generated by the hydraulic pump, and the lifting hydraulic cylinder extends to drive the side turning of the carriage in the lifting process so as to continuously reduce the oil pressure in the hydraulic lifting mechanism, so that the hydraulic pump needs to continuously work to ensure the oil pressure, and if the oil pressure generated by the hydraulic pump is too small, the carriage and the lifting hydraulic pump cannot coordinate to cause the vehicle to be out of control due to insufficient pressure supply.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a valve body concatenates in hydraulic pressure lifting mechanism to through cross at the oil pressure low and the first case of second case can't promote, make first accuse pressure spring force reset and realize cutting the end and seal and cut the mouth and prevent that the railway carriage from working under the low pressure drive and leading to the action one kind to have the low pressure to cut the bounce valve of function out of control.

In order to achieve the above purpose, the utility model provides a following technical scheme: the hydraulic lifting valve comprises a valve body, a flow passage for conveying pressure oil in a hydraulic lifting mechanism is arranged in the valve body, the flow passage is provided with a lifting oil inlet and a descending oil inlet which are connected in series with the hydraulic lifting mechanism, an opening and closing assembly for controlling the opening and closing of the flow passage is arranged in the valve body, the opening and closing assembly comprises a first valve core, a first pressure control spring and a second valve core, the first valve core is arranged in the valve body in a sliding mode, a low-pressure cut-off port is arranged on a sliding track of the first valve core, a cut-off end used for closing the low-pressure cut-off port and cutting off the flow passage is arranged on the side, facing the low-pressure cut-off port, of the first valve core, the first pressure control spring is arranged between the valve body and the first valve core in a compressing mode, the resetting direction of the first pressure control spring is the same as the direction of the cut-off end facing the low-, and the sliding directions of the first valve core and the second valve core are the same, the second valve core is provided with an opening end which is used for pushing the first valve core to separate the cut-off end from the low-pressure cut-off opening to open the flow passage towards the first valve core, and the valve body is provided with a pressure control opening which is used for generating the same oil pressure with the lifting oil inlet and is arranged at the side of the second valve core which is far away from the opening end.

By adopting the technical scheme, the lifting oil inlet and the pressure control opening of the valve body are connected with the lifting incoming flow direction in the hydraulic lifting mechanism, and the descending oil inlet is connected with the descending incoming flow direction in the hydraulic lifting mechanism, 1, when a carriage executes a lifting command, the oil pressure at the lifting oil inlet is larger than the oil pressure at the descending oil inlet, and if the incoming oil pressure is larger than a certain value, the incoming oil pressure drives the second valve core to drive towards the first valve core through the pressure control opening, so that the cut-off end is far away from the low-pressure cut-off opening to open the flow passage and enable the carriage to lift normally, and if the incoming oil pressure is smaller than a certain value, the acting force of the incoming oil pressure driving towards the first valve core through the pressure control opening is smaller than the reset acting force of the first pressure control spring, therefore, the cut-off end effectively seals the low-pressure cut-off opening under the action of the first pressure control spring to enable the flow passage to be cut off, so that the hydraulic oil in the hydraulic lifting mechanism, therefore, the situation that the vehicle is out of control due to the fact that actions between the compartment and the lifting hydraulic pump cannot be coordinated due to too low oil pressure is prevented, when the subsequent hydraulic pump works to achieve the fact that the oil pressure in the hydraulic lifting mechanism is raised, the flow channel is opened again to achieve continuous lifting; 2. when the carriage executes a descending command, namely the oil pressure at the descending oil inlet is greater than the oil pressure at the lifting oil inlet, the oil pressure at the descending oil inlet impacts the second valve core to open the flow passage.

The utility model discloses further set up to: the valve body is located that first accuse pressure spring deviates from first case side and runs through the valve body and be provided with the pressure regulating mouth, the valve body is located the pressure regulating mouth and slides and be provided with the one-level pressure regulating ejector pad that is used for adjusting the elasticity of first accuse pressure spring, the slip direction of one-level pressure regulating ejector pad is the same with the direction of first accuse pressure spring towards first case, be provided with on the valve body and be used for with the fixed subassembly of one-level pressure regulating ejector pad fixed mounting in the valve body.

Through adopting above-mentioned technical scheme, pressure regulating mouth department installation one-level pressure regulating ejector pad for slide through one-level pressure regulating ejector pad and strengthen or weaken the effort of first accuse pressure spring, thereby the required oil pressure that the runner need be opened in the adjustment, reinforcing suitability.

The utility model discloses further set up to: the fixed assembly comprises a fixed block arranged on the periphery of the first-stage pressure regulating push block, and a fixing bolt fixedly connected with the fixed block and the valve body is arranged between the fixed block and the valve body.

Through adopting above-mentioned technical scheme, the fixed connection of fixed block and valve body and the fixed connection of realization one-level pressure regulating ejector pad and valve body are realized to one-level pressure regulating ejector pad adoption fixing bolt, connect reliable and stable.

The utility model discloses further set up to: be provided with between fixed block and the one-level pressure regulating ejector pad and be used for rotating the fixed block and connect in the bearing of one-level pressure regulating ejector pad, and the axial of bearing is the same with the slip direction of one-level pressure regulating ejector pad, one-level pressure regulating ejector pad threaded connection is in the valve body.

Through adopting above-mentioned technical scheme, adopt the bearing and realize that rotation between fixed block and the one-level pressure regulating ejector pad is connected to the realization is fixed in the valve body and further improves joint strength with the mode that the one-level adjustment ejector pad adopted the screw thread, and the one-level adjustment ejector pad is because the unable circumferential direction of fixing bolt's threaded connection restriction and not hard up screw thread, thereby guarantees the stability of installation.

The utility model discloses further set up to: the second-stage pressure regulating push block is arranged between the first-stage pressure regulating push block and the first pressure control spring in a sliding mode and used for adjusting the elasticity of the first pressure control spring, the sliding direction of the second-stage pressure regulating push block is the same as the direction of the first pressure control spring towards the first valve core, and the first-stage pressure regulating push block is located on the side, away from the first pressure control spring, of the second-stage pressure regulating push block and is provided with a pressure regulating bolt used for driving the second-stage pressure regulating push block to move towards the direction of the first pressure control spring.

Through adopting above-mentioned technical scheme, the setting of second grade pressure regulating ejector pad can adopt the rotation of pressure regulating bolt to promote and carry out the fine setting pressure regulating of non-dismantlement after the adjustment of one-level pressure regulating ejector pad finishes and the installation is accomplished, guarantees more accurate of pressure regulating control.

The utility model discloses further set up to: and a hydraulic pushing surface parallel to the pressure control port is arranged on the side, facing the pressure control port, of the second valve core.

Through adopting above-mentioned technical scheme, the hydraulic pressure pushes away the face and presses mouthful setting parallel to each other with the accuse for hydraulic pressure pushes away the face and can bear perpendicularly and come from the hydraulic action that the accuse pressed mouthful and realize that more stable atress slides.

The utility model discloses further set up to: the improved check valve is characterized in that a communicating channel is arranged in the valve body and provided with a first communicating port and a second communicating port which are communicated with a flow channel, the first communicating port is located at a low-pressure cut port and faces a lifting oil inlet along the flow channel, the second communicating port is located at a low-pressure cut port and faces a descending oil inlet along the flow channel, a one-way assembly is arranged in the valve body and comprises a one-way valve element and a second pressure control spring, the one-way valve element slides and is arranged in the valve body, the one-way valve element is located at the first communicating port and deviates from the side of the second communicating port, the one-way valve element is provided with a one-way closed end used for sealing the first communicating port towards the side of the first communicating port, the second pressure control spring is compressed and arranged between the valve body and the one.

Through adopting above-mentioned technical scheme, the setting of intercommunication passageway, make at the lifting in-process because the pressure of lifting oil inlet department is greater than the oil pressure that descends oil inlet department, thereby the effective pressurized first intercommunication mouth of closed of one-way blind end cuts off the intercommunication passageway, and at the in-process that descends, the oil pressure direct action one-way case of decline oil inlet department overcomes the second and controls the spring action and open the intercommunication passageway, the accessible reduces the effort of spring is pressed to the second, and prevent because first accuse is pressed the spring effort too big, and the railway carriage internal load matter volume undersize and can't open, make descending more smooth and easy.

The invention is further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is an enlarged view of A in FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1;

fig. 5 is a partially enlarged view of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, the utility model discloses a rebound valve with low pressure cut-off function, which comprises a valve body 1, a flow passage 11 for transmitting pressure oil in a hydraulic lifting mechanism is arranged in the valve body 1, the flow passage 11 is provided with a lifting oil inlet 111 and a descending oil inlet 112 for connecting in series with the hydraulic lifting mechanism, wherein the lifting oil inlet 111 is arranged at the right side below the valve body 1, the descending oil inlet 112 is arranged at the lower side of the left side of the valve body 1, in addition, an opening and closing component 2 for controlling the opening and closing of the flow passage 11 is arranged in the valve body 1, wherein the opening and closing component 2 comprises a first valve core 21, a first pressure control spring 22 and a second valve core 23, the first valve core 21 is arranged in the upper side of the right half part of the valve body 1 in a sliding manner along the left-right direction, in addition, the flow passage 11 is arranged at the middle part of the upper side of the valve body 1 and is, correspondingly, the first valve core 21 is provided with a cut-off end 211 for closing the low-pressure cut-off port 113 and cutting off the flow passage 11 toward the left side, in addition, the first pressure control spring 22 is arranged on the right side of the first valve core 21 in a compressed manner, the reset acting force of the first pressure control spring 22 is used for pushing the cut-off end 211 toward the low-pressure cut-off port 113 so as to realize that the flow passage 11 is closed by the cut-off end 211 through closing the low-pressure cut-off port 113, in addition, the second valve core 23 is arranged on the upper side of the left half part of the valve body 1 in a sliding manner along the left-right direction, the sliding directions of the first valve core 21 and the second valve core 23 are overlapped and are in a sealing sliding manner, in addition, the second valve core 23 is provided with an opening end 231 for pushing the first valve core 21 toward the right so as to realize that the cut-off end 211 is separated from the low-pressure cut-off port 113 and open the flow passage 11, the valve body 1 is provided with, the descending oil inlet 112 is connected to the descending incoming flow side of the hydraulic lifting mechanism, therefore, when the carriage executes a lifting command, the oil pressure at the lifting oil inlet 111 is greater than the oil pressure at the lowering oil inlet 112, and when the incoming oil pressure is greater than a certain value, the incoming oil pressure drives the second valve core 23 to drive towards the first valve core 21 through the pressure control port 12, the cut-off end 211 is far away from the low-pressure cut-off port 113 to open the flow channel 11, so that the carriage is lifted to normally work, and when the incoming oil pressure is less than a certain value, the acting force of the incoming oil pressure driving the second valve core 23 towards the first valve core 21 through the pressure control port 12 is smaller than the reset acting force of the first pressure control spring 22, so that the cut-off end 211 effectively seals the low-pressure cut-off port 113 under the action of the first pressure control spring 22, so that the flow channel 11 is cut off, the flow of the hydraulic oil in the hydraulic lifting mechanism stops to stop the lifting of the carriage, thereby preventing the, and when the subsequent hydraulic pump works to realize the rise of the oil pressure in the hydraulic lifting mechanism, the flow passage 11 is opened again to realize the continuous lifting.

Referring to fig. 3, in the present embodiment, a communication passage 13 is provided in the middle of the valve body 1, the communication passage 13 is provided with a first communication port 131 communicated with the right side of the flow passage 11 and a second communication port 132 communicated with the left side of the flow passage 11, in addition, the valve body 1 is provided with a check assembly 3 at the right side of the first communication port 131, wherein the check assembly 3 comprises a check valve core 31, a second pressure control spring 32 and a guide bolt 33, the guide bolt 33 is threadedly mounted at the right side of the valve body 1, the guide bolt 33 is provided with a guide post 331 axially along the left-right direction in the valve body 1, the check valve core 31 is sleeved on the guide post 331 and slides along the axial direction of the guide post 331, the check valve core 31 is provided with a check closed end 311 for closing the first communication port 131 toward the left side, in addition, the second pressure control spring 32 is compressively disposed between the guide bolt 33 and the check valve core 31, and the return direction of the second pressure control spring 32 is the same, therefore, the arrangement of the communicating channel 13 makes the pressure at the lifting oil inlet 111 greater than the oil pressure at the lowering oil inlet 112 in the lifting process, so that the one-way closed end 311 effectively seals the first communicating port 131 under pressure to cut off the communicating channel 13, and in the lowering process, the oil pressure at the lowering oil inlet 112 directly acts on the one-way valve core 31 and overcomes the action of the second pressure control spring 32 to open the communicating channel 13, the acting force of the second pressure control spring 32 can be reduced, and the phenomenon that the acting force of the first pressure control spring 22 is too large, and the load mass in the carriage is too small to open the carriage is prevented, so that the lowering action is smoother.

In addition, as shown in fig. 4, the valve body 1 in this embodiment is located on the right side of the first pressure control spring 22 and penetrates through the valve body 1 to be provided with the pressure regulating port 14, the valve body 1 is located on the pressure regulating port 14 and is provided with the first-stage pressure regulating push block 4 for regulating the elastic force of the first pressure control spring 22 in a sliding manner along the left-right direction, and in addition, the valve body 1 is provided with the fixing component 5 for fixedly mounting the first-stage pressure regulating push block 4 on the valve body 1, so that the acting force of the first pressure control spring 22 is enhanced or weakened through the sliding movement of the first-stage pressure regulating push block 4, the required oil pressure for opening the flow channel.

Preferably, the fixing assembly 5 in this embodiment includes a fixing block 51 disposed at the periphery of the first-stage pressure regulating push block 4, and a fixing bolt 52 for fixedly connecting the fixing block 51 and the valve body 1 is disposed between the fixing block 51 and the valve body 1, wherein the number of the fixing bolts 52 is two, and the fixing bolts are disposed at two sides of the first-stage pressure regulating push block 4 in a vertically symmetrical manner, so that the adjusted first-stage pressure regulating push block 4 can be stably mounted on the valve body 1 by a plurality of fixing bolts 52.

In addition, be provided with between fixed block 51 and the one-level pressure regulating ejector pad 4 in this embodiment and be used for rotating fixed block 51 and connect in the bearing 53 of one-level pressure regulating ejector pad 4, fixed block 51 is the annular, cup joint on the bearing 53 outer ring, and one-level pressure regulating ejector pad 4 inserts and establishes the inner ring side that is fixed in bearing 53, in addition, one-level pressure regulating ejector pad 4 threaded connection is in valve body 1, consequently, adopt bearing 53 and realize rotating between fixed block 51 and the one-level pressure regulating ejector pad 4 and be connected, thereby realize adopting the threaded mode with one-level adjustment ejector pad to be fixed in valve body 1 and further improve joint strength, and the one-level adjustment ejector pad is because the unable circumferential direction of the threaded connection restriction of fixing bolt 52 and become flexible screw thread, thereby guarantee the.

In addition, the second-stage pressure regulating push block 6 used for adjusting the elasticity of the first pressure control spring 22 is arranged between the first-stage pressure regulating push block 4 and the first pressure control spring 22 in the embodiment in a sliding mode along the left-right direction, and the pressure regulating bolt 7 used for driving the second-stage pressure regulating push block 6 to move towards the direction of the first pressure control spring 22 is arranged on the right side of the second-stage pressure regulating push block 4 positioned on the right side of the second-stage pressure regulating push block 6 in a threaded connection mode, so that the second-stage pressure regulating push block 6 can be arranged to be pushed by the rotation of the pressure regulating bolt 7 after the adjustment of the first-stage pressure regulating push block 4 is finished and the installation is finished, and the non-detachable fine.

As shown in fig. 5, the second valve element 23 in this embodiment is provided with a hydraulic pushing surface 232 facing the left side and parallel to the pressure control port 12, so that the hydraulic pushing surface 232 and the pressure control port 12 are parallel to each other, and the hydraulic pushing surface 232 can vertically bear the hydraulic action from the pressure control port 12 to realize more stable force sliding.

Claims

1. A rebound valve with low-pressure cut-off function is characterized in that: the hydraulic lifting valve comprises a valve body, a flow passage for conveying pressure oil in a hydraulic lifting mechanism is arranged in the valve body, the flow passage is provided with a lifting oil inlet and a descending oil inlet which are connected in series with the hydraulic lifting mechanism, an opening and closing assembly for controlling the opening and closing of the flow passage is arranged in the valve body, the opening and closing assembly comprises a first valve core, a first pressure control spring and a second valve core, the first valve core is arranged in the valve body in a sliding mode, a low-pressure cut-off port is arranged on a sliding track of the first valve core, a cut-off end used for closing the low-pressure cut-off port and cutting off the flow passage is arranged on the side, facing the low-pressure cut-off port, of the first valve core, the first pressure control spring is arranged between the valve body and the first valve core in a compressing mode, the resetting direction of the first pressure control spring is the same as the direction of the cut-off end facing the low-, and the sliding directions of the first valve core and the second valve core are the same, the second valve core is provided with an opening end which is used for pushing the first valve core to separate the cut-off end from the low-pressure cut-off opening to open the flow passage towards the first valve core, and the valve body is provided with a pressure control opening which is used for generating the same oil pressure with the lifting oil inlet and is arranged at the side of the second valve core which is far away from the opening end.

2. The rebound valve having a low pressure cutoff function as set forth in claim 1, wherein: the valve body is located that first accuse pressure spring deviates from first case side and runs through the valve body and be provided with the pressure regulating mouth, the valve body is located the pressure regulating mouth and slides and be provided with the one-level pressure regulating ejector pad that is used for adjusting the elasticity of first accuse pressure spring, the slip direction of one-level pressure regulating ejector pad is the same with the direction of first accuse pressure spring towards first case, be provided with on the valve body and be used for with the fixed subassembly of one-level pressure regulating ejector pad fixed mounting in the valve body.

3. The rebound valve having a low pressure cutoff function as set forth in claim 2, wherein: the fixed assembly comprises a fixed block arranged on the periphery of the first-stage pressure regulating push block, and a fixing bolt fixedly connected with the fixed block and the valve body is arranged between the fixed block and the valve body.

4. A rebound valve having a low pressure cutoff function as set forth in claim 3, wherein: be provided with between fixed block and the one-level pressure regulating ejector pad and be used for rotating the fixed block and connect in the bearing of one-level pressure regulating ejector pad, and the axial of bearing is the same with the slip direction of one-level pressure regulating ejector pad, one-level pressure regulating ejector pad threaded connection is in the valve body.

5. The rebound valve having a low pressure cutoff function as set forth in claim 2, wherein: the second-stage pressure regulating push block is arranged between the first-stage pressure regulating push block and the first pressure control spring in a sliding mode and used for adjusting the elasticity of the first pressure control spring, the sliding direction of the second-stage pressure regulating push block is the same as the direction of the first pressure control spring towards the first valve core, and the first-stage pressure regulating push block is located on the side, away from the first pressure control spring, of the second-stage pressure regulating push block and is provided with a pressure regulating bolt used for driving the second-stage pressure regulating push block to move towards the direction of the first pressure control spring.

6. The rebound valve having a low pressure cutoff function as set forth in claim 1, wherein: and a hydraulic pushing surface parallel to the pressure control port is arranged on the side, facing the pressure control port, of the second valve core.

7. The rebound valve having a low pressure cutoff function as set forth in claim 1, wherein: the improved check valve is characterized in that a communicating channel is arranged in the valve body and provided with a first communicating port and a second communicating port which are communicated with a flow channel, the first communicating port is located at a low-pressure cut port and faces a lifting oil inlet along the flow channel, the second communicating port is located at a low-pressure cut port and faces a descending oil inlet along the flow channel, a one-way assembly is arranged in the valve body and comprises a one-way valve element and a second pressure control spring, the one-way valve element slides and is arranged in the valve body, the one-way valve element is located at the first communicating port and deviates from the side of the second communicating port, the one-way valve element is provided with a one-way closed end used for sealing the first communicating port towards the side of the first communicating port, the second pressure control spring is compressed and arranged between the valve body and the one.