Hydraulic system pressure relief device with hydraulic lock

Abstract

The invention discloses a hydraulic system pressure relief device with a hydraulic lock, and belongs to the technical field of hydraulic systems.The hydraulic system pressure relief device with the hydraulic lock comprises a hydraulic lock body and further comprises a double-shaft motor fixedly arranged on the side wall of the hydraulic lock body, and extension rods are fixedly arranged at the two output ends of the double-shaft motor respectively; a driving gear is fixedly arranged at the end, away from the double-shaft motor, of the extension rod, fixing blocks are arranged on the side walls of the two sides of the hydraulic lock body correspondingly, driven gears are rotatably connected to the side walls of the fixing blocks, the driven gears are of hollow design, protruding blocks are further fixedly arranged on the side walls of the fixing blocks, and the driven gears are engaged with the driving gear; and a bracket is fixedly arranged on the side wall of the driven gear. The double-shaft motor can drive the flow guide pipe and the collecting tank to rotate by driving the driving gear, so that hydraulic oil in the hydraulic lock body enters the collecting tank, and an oil sample in the hydraulic lock body is safely and rapidly collected.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic systems, and in particular relates to a hydraulic system pressure relief device comprising a hydraulic lock. Background Art

[0002] The core function of the hydraulic lock is to firmly lock the hydraulic actuator in its current position when the hydraulic power source stops working or the system loses pressure, preventing it from accidentally moving due to external forces. Its working principle is mainly based on the neutral position function of the sliding valve type reversing valve and the locking function of the one-way valve. When the system needs to be locked, the hydraulic lock can prevent the flow of liquid by closing the liquid flow channel, thereby maintaining the pressure and position of the system.

[0003] In Chinese patent publication number CN215171139U, a hydraulic system pressure relief device including a hydraulic lock is disclosed. By providing a hydraulic unlocking mechanism in the hydraulic system, the problem of the hydraulic system being unable to release the pressure in the pipeline or actuator unit due to the hydraulic lock is solved, thereby facilitating maintenance or replacement operations of the hydraulic system.

[0004] The composition of the liquid after pressure relief is consistent with that of the liquid flow during normal use. Therefore, the staff can understand the condition of the hydraulic oil during normal use by checking the liquid after pressure relief. However, since the liquid flow in the hydraulic lock is under high pressure, it is more difficult to safely collect the liquid after pressure relief, which makes it difficult for the staff to timely understand the liquid condition inside the hydraulic lock. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a hydraulic system pressure relief device containing a hydraulic lock.

[0006] The technical solutions adopted to solve the above technical problems are: A hydraulic system pressure relief device including a hydraulic lock, comprising a hydraulic lock body and: A dual-axis motor is fixedly provided on the side wall of the hydraulic lock body, and an extension rod is fixedly provided on the two output ends of the dual-axis motor respectively, and a driving gear is fixedly provided on the end of the extension rod away from the dual-axis motor. Fixed blocks are respectively provided on the side walls of both sides of the hydraulic lock body, and the side walls of the fixed blocks are rotatably connected to the driven gear, and the driven gear is hollow in design. A protrusion is also fixedly provided on the side wall of the fixed block, and the driven gear meshes with the driving gear. A bracket is fixedly provided on the side wall of the driven gear; Two oil outlets are provided at the top of the hydraulic lock body, and two oil inlets are provided at the bottom of the hydraulic lock body. Two symmetrical movement chambers are provided in the hydraulic lock body. The top of the movement chamber is connected to the oil outlet, and the bottom is connected to the oil inlet. An intermediate chamber is connected between the two movement chambers. A valve core is slidably connected in the intermediate chamber, and a blocking valve is slidably connected in the movement chamber. A plurality of guide tubes are provided in the blocking valve, and the plurality of guide tubes respectively pass through the side walls of the hydraulic lock body. The guide tubes are "L"-shaped, and the side walls of the guide tubes are clamped on the side walls of the bracket. A collection tank is provided at the other end of the guide tubes.

[0007] Through the above technical solution, the dual-axis motor in the present invention can drive the guide tube and the collection tank to rotate by driving the active gear, thereby allowing the hydraulic oil inside the hydraulic lock body to enter the collection tank, and safely and quickly collect the oil sample inside the hydraulic lock body.

[0008] Furthermore, an arc-shaped groove is provided on the side wall of the bracket, the guide tube is installed inside the arc-shaped groove, the side wall of the bracket is rotatably connected to a support rod, the side wall of the support rod is fixedly provided with a clamping plate, the side wall of the collection tank is fixedly provided with a clamping block, and the side wall of the clamping plate is provided with a clamping hole, and the position of the clamping hole corresponds to the position of the clamping block.

[0009] Through the above technical solution, since the cross-section of the guide tube is circular, in order to better accommodate the guide tube, it is necessary to open an arc groove on the side wall of the bracket. The card plate and the card hole design on its side wall allow the card block to be clipped into the card plate, thereby preventing the collection tank from being accidentally removed.

[0010] Furthermore, the side wall of the protrusion is fixedly connected to a connecting rod, the other end of the connecting rod is fixedly connected to the top plate, and the side wall of the top plate is fixedly provided with a plurality of wedge blocks, and each of the wedge blocks abuts against the corresponding side wall of the card plate.

[0011] Through the above technical solution, it can be seen from the figure that the wedge block is in a shape with one end low and the other end high. Therefore, when the passive gear drives the bracket and the card plate to rotate, the stationary connecting rod and the top plate will rotate relative to the card plate, thereby causing the wedge block to squeeze the card plate, causing the card block to enter the card hole, thereby preventing the staff from accidentally removing the collection tank.

[0012] Furthermore, a torsion spring is wound around the outside of the support rod, one end of the torsion spring is fixedly connected to the side wall of the bracket, and the other end is fixedly connected to the side wall of the clamping plate.

[0013] Through the above technical solution, the setting of the torsion spring ensures that the card plate will remain in a lifted state, that is, the card plate will be in a state of not being engaged with the card block. At this time, the collection tank is not restricted in position by the card plate, so it can be removed by the staff, and then the liquid sample inside the collection tank can be inspected.

[0014] Furthermore, the side wall of the card plate is rotatably connected to a transparent plate away from the connecting rod, the side wall of the transparent plate is fixedly provided with scale lines, the side wall of the card plate is also provided with scale lines, the scale lines are annularly arranged on the side wall of the transparent plate, the side wall of the transparent plate is fixedly provided with a push plate, the side wall of the push plate is provided with a through hole, the side wall of the driving gear is fixedly connected to a fixing rod, and the fixing rod passes through the through hole.

[0015] Through the above technical solution, the transparent plate can rotate relative to the clamping plate. Therefore, when the driving gear drives the driven gear to rotate, the fixed rod arranged on the side wall of the driving gear will drive the push plate to rotate, thereby causing the transparent plate to rotate. The staff can grasp the rotation angle of the transparent plate and the guide tube by checking the rotation of the scale line.

[0016] Furthermore, the blocking valve includes a tube body, a sealing plate, a push rod, a fixed plate, a rotating plate and a first spring. The tube body is slidably connected in the motion cavity. The tube body is hollow in design. The side wall of the tube body is provided with a plurality of through holes. The sealing plate is slidably connected to the inner wall of the tube body. The outer diameter of the sealing plate is consistent with the inner diameter of the tube body. The push rod is fixedly connected to the side wall of the sealing plate. The first spring is fixedly arranged between the push rod and the side wall of the motion cavity. The fixed plate is fixedly arranged on the side wall of the push rod. The side wall of the fixed plate is provided with a plurality of fixing holes. The rotating plate is rotatably connected to the side wall of the fixed plate. The side wall of the rotating plate is provided with a plurality of rotating holes. The number and aperture of the rotating holes are consistent with those of the fixed holes. Each of the rotating holes is connected to a guide tube respectively. The side wall of the protrusion is provided with a motion groove for the rotation of the guide tube.

[0017] Through the above technical solution, the hydraulic oil will push the sealing plate toward the first spring in a high-pressure environment, thereby opening the passage inside the tube body. At this time, the hydraulic oil can pass through the through hole, enter from the oil inlet, and exit from the oil outlet. The force applied by the first spring to the push rod and the sealing plate will cause the sealing plate to maintain a closed state to the passage inside the tube body. The setting of the fixed plate and the rotating plate can ensure that when pressure relief is required, the hydraulic oil is introduced into the guide tube, and then the hydraulic oil enters the collection tank.

[0018] Furthermore, both ends of the valve core respectively abut against the side walls of the two sealing plates, the outer diameter of the push rod is smaller than the outer diameter of the sealing plate, the outer diameter of the rotating plate is consistent with the outer diameter of the fixed plate, and the outer diameter of the fixed plate is also consistent with the inner diameter of the tube body.

[0019] Through the above technical solution, no matter which oil inlet is input, the valve core will move toward the other end under the action of oil pressure, and then the sealing plate at the other end will be pushed open, so that both passages are opened, thereby making the oil circuit unobstructed. When oil is input into one of the oil inlets, the oil pressure will push the valve core to the blocking valve at the location of the other oil inlet. At this time, the blocking valve at the oil inlet where the oil is input will also be pushed open under the action of oil pressure, and the oil can flow out from the oil inlet through the blocking valve and the oil outlet at the corresponding position. At the same time, since the valve core is pushed toward the blocking valve at the other oil inlet by the oil pressure, the blocking valve at the other oil inlet will also be opened. At this time, the oil can flow back from the other oil outlet and flow back to the other oil inlet through the blocking valve, forming a complete oil circuit.

[0020] Furthermore, the end of the sealing plate facing away from the push rod is designed as an arc surface, and a pressure relief hole is provided on the side wall of the sealing plate.

[0021] Through the above technical solution, the arc-shaped structure is similar to the principle of an arch bridge, which can disperse the pressure of the hydraulic oil and prevent the top of the piston from deforming or cracking under high pressure. The pressure relief hole in the middle position can optimize the mass distribution, reduce the weight of the sealing plate, and reduce the load on the push rod.

[0022] Furthermore, a connecting pipe is connected to the bottom of the collection tank, the connecting pipe is threadedly connected to the guide pipe, a piston is slidably connected to the inner wall of the collection tank, and the side wall of the piston away from the connecting pipe is fixedly connected to an identification rod, and the other end of the identification rod passes through the side wall of the collection tank.

[0023] Through the above technical solution, when the hydraulic oil enters the collection tank, it will push up the piston and the identification rod, and the staff can know the amount of hydraulic oil inside the collection tank by observing the position of the identification rod.

[0024] Furthermore, a second spring is wound around the outside of the identification rod, the other end of the second spring is fixedly connected to the top of the collection tank, and the identification rod extends out of the side wall of one end of the collection tank and is fixedly provided with a top cap.

[0025] Through the above technical solution, the force applied to the piston by the second spring will keep the piston at the bottom of the collection tank. The piston can only be driven to move when oil sprays out from the connecting pipe. The setting of the top cap allows the staff to easily lift the identification rod, which makes it convenient for the staff to test the elastic force of the second spring after taking out the oil sample.

[0026] The beneficial effects of the present invention are as follows: (1) The present invention provides a dual-axis motor and a blocking valve. The dual-axis motor can drive the active gear to rotate the passive gear on the side wall of the fixed block, thereby driving the guide tube and the collection tank to rotate. The rotation of the guide tube will drive the rotating plate to rotate, thereby allowing the hydraulic oil inside the hydraulic lock body to enter the collection tank, making it convenient for staff to collect oil samples inside the hydraulic lock body safely and quickly; (2) The present invention provides a card plate and a wedge block on the side wall of the protrusion. Since the wedge block is in a shape with one end lower than the other end, when the passive gear drives the bracket and the card plate to rotate, the stationary connecting rod and the top plate will rotate relative to the card plate, thereby causing the wedge block to squeeze the card plate, so that the card block enters the card hole. The stuck card block can further limit the position of the collection tank, thereby preventing the staff from accidentally removing the collection tank; (3) The present invention sets a piston, a second spring and an identification rod in the collection tank. When the hydraulic oil enters the collection tank from the connecting pipe, the piston and the identification rod will be pushed up. The second spring can reduce the oil pressure under high pressure to a certain extent, preventing the oil sample from impacting the side wall of the collection tank and causing damage to it. In addition, the staff can know the amount of hydraulic oil in the collection tank by observing the position of the identification rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of the present invention; Figure 2 It is a rear view of the present invention; Figure 3 It is a schematic structural diagram of the side wall of the rotating gear in the present invention; Figure 4 is a cross-sectional view of the bracket of the present invention; Figure 5 yes Figure 4 A partial enlarged view of part A; Figure 6 It is a structural schematic diagram of the side wall of the card board in the present invention; Figure 7 is a cross-sectional view of the hydraulic lock body of the present invention; Figure 8 It is a structural schematic diagram of the blocking valve in the present invention; Figure 9 It is a schematic diagram of the structure inside the tube body of the present invention; Figure 10 It is a schematic diagram of the structure between the rotating plate and the fixed plate in the present invention; Figure 11 It is a cross-sectional view of the collecting tank in the present invention.

[0028] Figure 1: Hydraulic lock body; 2: Dual-axis motor; 3: Extension rod; 4: Driving gear; 5: Fixed block; 6: Passive gear; 7: Bump; 8: Bracket; 9: Oil outlet; 10: Oil inlet; 11: Movement chamber; 12: Intermediate chamber; 13: Valve core; 14: Flow guide tube; 15: Collection tank; 16: Arc groove; 17: Support rod; 18: Clamping plate; 19: Clamping block; 20: Clamping hole; 21: Connecting rod; 22: Top plate; 23: Wedge Block; 24. Torsion spring; 25. Transparent plate; 26. Scale line; 27. Push plate; 28. Perforation; 29. Fixed rod; 30. Tube body; 31. Sealing plate; 32. Push rod; 33. Fixed plate; 34. Rotating plate; 35. First spring; 36. Through hole; 37. Fixed hole; 38. Rotating hole; 39. Moving groove; 40. Pressure relief hole; 41. Connecting pipe; 42. Piston; 43. Marking rod; 44. Second spring; 45. Top cap. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] like Figure 1 - Figure 3 as well as Figure 8 As shown, this embodiment provides a hydraulic system pressure relief device containing a hydraulic lock, including a hydraulic lock body 1, a dual-axis motor 2 is fixedly provided on the side wall of the hydraulic lock body 1, and an extension rod 3 is fixedly provided at the two output ends of the dual-axis motor 2, and a driving gear 4 is fixedly provided at one end of the extension rod 3 away from the dual-axis motor 2. Fixed blocks 5 are respectively provided on the side walls of the hydraulic lock body 1, and the side walls of the fixed block 5 are rotatably connected to the passive gear 6. The passive gear 6 is hollow in design, and a protrusion 7 is also fixedly provided on the side wall of the fixed block 5. The passive gear 6 is meshed with the active gear 4, and a bracket 8 is fixedly provided on the side wall of the passive gear 6. The number of the brackets 8 is consistent with the number of the guide pipes 14 mentioned below.

[0031] Reference Figure 7 - Figure 10The hydraulic lock body 1 has two oil outlets 9 at the top and two oil inlets 10 at the bottom. The hydraulic lock body 1 has two symmetrical movement chambers 11. The top of the movement chamber 11 is connected to the oil outlet 9, and the bottom is connected to the oil inlet 10. An intermediate chamber 12 is connected between the two movement chambers 11. A valve core 13 is slidably connected in the intermediate chamber 12. A blocking valve is slidably connected in the movement chamber 11. A number of guide pipes 14 are provided in the blocking valve. One of the two oil inlets 10 can be marked as A inlet and the other as B inlet. Similarly, the oil outlet 9 above the A inlet can be marked as A outlet, and the oil outlet 9 above the B inlet can be marked as B outlet. When oil enters the A inlet, the oil pressure will push the valve core 13 to the blocking valve at the position of the B inlet. At this time, the blocking valve where the A inlet is located is pushed open by the oil pressure, and oil can flow out from the A inlet through the blocking valve and from the A outlet. At the same time, since the valve core 13 is pushed toward the blocking valve where the B inlet is located by the oil pressure, the blocking valve is also opened at this time, and oil can flow back from the B outlet and flow back to the B inlet through the blocking valve. Vice versa, when oil enters the B inlet, the oil pressure will push the valve core 13 to the blocking valve where the A inlet is located, and at this time the blocking valve where the B inlet is located will also be pushed open by the oil pressure, and oil can flow out from the B inlet through the blocking valve and from the B outlet. At the same time, since the valve core 13 is pushed toward the blocking valve where the A inlet is located by the oil pressure, the blocking valve where the A inlet is located will also be opened. At this time, oil can flow back from the A outlet and flow back to the A inlet through the blocking valve, forming a complete oil circuit.

[0032] When oil is supplied to inlet A and inlet B at the same time, the oil pressure on both ends of the valve core 13 is the same, so the valve core 13 will stay in the middle position of the middle cavity 12 without contacting any blocking valve, and the oil circuit will be blocked.

[0033] The plug valve includes a tube body 30, a sealing plate 31, a push rod 32, a fixed plate 33, a rotating plate 34 and a first spring 35. The tube body 30 is slidably connected in the motion chamber 11. The tube body 30 is hollow in design. A plurality of through holes 36 are opened on the side wall of the tube body 30. The arrangement of the through holes 36 allows oil to enter the position between the sealing plate 31 and the fixed plate 33 from the oil inlet 10, and then flow out from the motion chamber 11 and finally flow out from the oil outlet 9. The sealing plate 31 is slidably connected to the inner wall of the tube body 30. The outer wall of the sealing plate 31 is provided with a plurality of through holes 36. The diameter is consistent with the inner diameter of the tube body 30, so when no oil enters, the sealing plate 31 can keep the end of the tube body 30 facing the oil inlet 10 in a sealed state. The end of the sealing plate 31 facing away from the push rod 32 is designed as an arc surface, and a pressure relief hole 40 is opened on the side wall of the sealing plate 31. The arc structure is similar to the principle of an arch bridge, which can disperse the pressure of the hydraulic oil and prevent the top of the piston 42 from deforming or cracking under high pressure. The pressure relief hole 40 in the middle position can optimize the mass distribution, reduce the weight of the sealing plate 31, and reduce the load on the push rod 32.

[0034] In a high-pressure environment, the hydraulic oil will push the sealing plate 31 toward the first spring 35, thereby opening the passage inside the tube body 30. At this time, the hydraulic oil can pass through the through hole 36, enter from the oil inlet 10, and exit from the oil outlet 9. The force applied by the first spring 35 to the push rod 32 and the sealing plate 31 will cause the sealing plate 31 to maintain a closed state for the passage inside the tube body 30. The setting of the fixed plate 33 and the rotating plate 34 can ensure that when pressure relief is required, the hydraulic oil is introduced into the guide tube 14, and then the hydraulic oil enters the collection tank 15.

[0035] The push rod 32 is fixedly connected to the side wall of the sealing plate 31, and the first spring 35 is fixedly arranged between the push rod 32 and the side wall of the movement chamber 11. In the absence of external force, the elastic force of the first spring 35 is sufficient to keep the sealing plate 31 in a sealed state inside the tube body 30. The fixed plate 33 is fixedly arranged on the side wall of the push rod 32, and a plurality of fixed holes 37 are opened on the side wall of the fixed plate 33. The rotating plate 34 is rotatably connected to the side wall of the fixed plate 33, and a plurality of rotating holes 38 are opened on the side wall of the rotating plate 34. The number and aperture of the rotating holes 38 are the same as those of the fixed holes 37, and each rotating hole 38 is connected to a guide tube 14 respectively. In the initial state, the position of the fixed hole 37 is staggered with the position of the rotating hole 38, so that the oil does not flow out from between the fixed plate 33 and the sealing plate 31, but There are only two options: the oil inlet 10 and the oil outlet 9. When the dual-axis motor 2 rotates, the rotating plate 34 will drive the rotation, and the originally staggered rotating hole 38 and the fixed hole 37 will gradually overlap. At this time, the oil has another way out, which is to flow out from the gap between the fixed hole 37 and the rotating hole 38. Moreover, the rotating plate 34 and the fixed plate 33 are sealed and rotated, and the gap between the two is small, so the oil will only flow into the guide tube 14. The side wall of the protrusion 7 is provided with a motion groove 39 for the guide tube 14 to rotate. The setting of the motion groove 39 gives the guide tube 14 a range of motion, which makes it more convenient for the staff to operate the rotation of the dual-axis motor 2.

[0036] The two ends of the valve core 13 are respectively against the side walls of the two sealing plates 31. The outer diameter of the push rod 32 is smaller than the outer diameter of the sealing plate 31. The outer diameter of the rotating plate 34 is consistent with the outer diameter of the fixed plate 33. The outer diameter of the fixed plate 33 is also consistent with the inner diameter of the tube body 30. After the oil enters the pipeline, it will be retained between the sealing plate 31 and the fixed plate 33. Although the side wall of the fixed plate 33 is provided with a fixing hole 37, the rotating hole 38 on the side wall of the rotating plate 34 on the other side is staggered with the fixing hole 37, so that the oil will not flow out. No matter which oil inlet 10 is used, the valve core 13 will move toward the other end under the action of oil pressure, and then the sealing plate 31 at the other end will be pushed open, so that both passages are opened, thereby making the oil path unobstructed.

[0037] Combined with reference Figure 3, several guide pipes 14 pass through the side wall of the hydraulic lock body 1 respectively. The guide pipe 14 is "L"-shaped. The "L"-shaped guide pipe 14 can also play a certain buffering role on the outflowing oil. The side wall of the guide pipe 14 is clamped on the side wall of the bracket 8. The side wall of the bracket 8 is provided with an arc groove 16. The guide pipe 14 is installed inside the arc groove 16. The side wall of the bracket 8 is rotatably connected with a support rod 17. The side wall of the support rod 17 is fixed with a card plate 18. The side wall of the collection tank 15 is fixed with a card block 19. The side wall of the card plate 18 is provided with a card hole 20. The card hole 20 The position corresponds to the position of the card block 19. Since the cross-section of the guide tube 14 is circular, in order to better accommodate the guide tube 14, it is necessary to open an arc groove 16 on the side wall of the bracket 8, and the card plate 18 and the card hole 20 on its side wall are designed so that the card block 19 can be clamped in the card plate 18, thereby preventing the collection tank 15 from being rotated and then being accidentally removed, ensuring that the collection tank 15 can be removed by the staff only when the guide tube 14 is in an inclined state, that is, the rotating hole 38 is staggered with the fixing hole 37.

[0038] Reference Figure 4 and Figure 5 As shown, a torsion spring 24 is wound around the outside of the support rod 17, one end of the torsion spring 24 is fixedly connected to the side wall of the bracket 8, and the other end is fixedly connected to the side wall of the clamping plate 18. The setting of the torsion spring 24 allows the clamping plate 18 to remain in a lifted state, that is, the clamping plate 18 will be in a state of not being engaged with the clamping block 19, and the clamping plate 18 will remain in contact with the top plate 22. At this time, the collecting tank 15 is not restricted in position by the clamping plate 18 and can be rotated freely. Therefore, it can be easily removed by the staff, and then the liquid sample inside the collecting tank 15 can be inspected.

[0039] Reference Figure 2 and Figure 6 As shown, the side wall of the protrusion 7 is fixedly connected to a connecting rod 21, and the other end of the connecting rod 21 is fixedly connected to a top plate 22. A number of wedges 23 are fixedly provided on the side wall of the top plate 22, and each wedge 23 abuts against the corresponding side wall of the card plate 18. Figure 6 It can be seen that the wedge block 23 is in a shape with one end low and the other end high. Since the card plate 18 will maintain contact with the top plate 22 under the action of the torsion spring 24, when the passive gear 6 drives the bracket 8 and the card plate 18 to rotate, the stationary connecting rod 21 and the top plate 22 will rotate relative to the card plate 18, thereby causing the wedge block 23 to squeeze the card plate 18, and the wedge block 23 will press the card block 19 into the card hole 20, so that the collection tank 15 is restricted from rotating, thereby preventing the staff from accidentally removing the collection tank 15 during the process of oil entering the collection tank 15 from the guide tube 14.

[0040] The side wall of the card plate 18 is rotatably connected to the side wall away from the connecting rod 21, and the side wall of the transparent plate 25 is fixedly provided with a scale line 26. The side wall of the card plate 18 is also provided with a scale line 26. The scale line 26 is annularly arranged on the side wall of the transparent plate 25. The side wall of the transparent plate 25 is fixedly provided with a push plate 27. The side wall of the push plate 27 is provided with a through hole 28. The side wall of the driving gear 4 is fixedly connected with a fixing rod 29. The fixing rod 29 passes through the through hole 28. The transparent plate 25 can rotate relative to the card plate 18. Therefore, when the driving gear 4 drives the driven gear 6 to rotate, the fixing rod 29 set on the side wall of the driving gear 4 will drive the push plate 27 to rotate, thereby causing the transparent plate 25 to rotate. Figure 6 The scale mark 26 in the figure is only for reference. The scale mark 26 does not actually Figure 6 The sparse scale lines 26 can also serve as a marker, and the staff can grasp the rotation angle of the transparent plate 25 and the guide tube 14 by checking the degree of misalignment between the scale lines 26 on the transparent plate 25 and the card plate 18.

[0041] from Figure 11 It can be seen that a collecting tank 15 is provided at the other end of the guide tube 14, and a connecting tube 41 is connected to the bottom of the collecting tank 15. The connecting tube 41 is threadedly connected to the guide tube 14, and a piston 42 is slidably connected to the inner wall of the collecting tank 15. The side wall of the piston 42 away from the connecting tube 41 is fixedly connected to an identification rod 43, and the other end of the identification rod 43 passes through the side wall of the collecting tank 15. When the hydraulic oil enters the collecting tank 15, the piston 42 and the identification rod 43 will be lifted. The staff can know the amount of hydraulic oil inside the collecting tank 15 by observing the position of the identification rod 43. In actual production, an oil level line can also be set on the side wall of the identification rod 43 to more clearly record the current oil level of the collecting tank 15, which is more convenient for recording and archiving.

[0042] A second spring 44 is wrapped around the outside of the identification rod 43, and the other end of the second spring 44 is fixedly connected to the top of the collection tank 15. The identification rod 43 extends out of the side wall of the collection tank 15 and is fixed with a top cap 45. The force applied to the piston 42 by the second spring 44 will keep the piston 42 at the bottom of the collection tank 15. Only when oil is sprayed out from the connecting pipe 41 can the piston 42 be driven to move. The setting of the top cap 45 makes it easy for the staff to lift the identification rod 43, which makes it convenient for the staff to test the elastic force of the second spring 44 after taking out the oil sample.

[0043] The working principle of this embodiment is as follows: in the initial state, the rotating hole 38 on the side wall of the rotating plate 34 and the fixing hole 37 on the side wall of the fixing plate 33 are staggered with each other, and the guide tube 14 is also in an inclined state. When the hydraulic lock body 1 needs to be depressurized, the oil supply is first cut off, and then the dual-axis motor 2 is started. The dual-axis motor 2 will drive the extension rod 3 to rotate, and then the active gear 4 on the side wall of the extension rod 3 will drive the passive gear 6 to rotate. The fixed rod 29 provided on the side wall of the active gear 4 will drive the push plate 27 to rotate, and the transparent plate 25 on the side wall of the push plate 27 will rotate relative to the card plate 18. The staff can know the rotation angle of the guide tube 14 by checking the degree of deviation of the scale lines 26 respectively located on the transparent plate 25 and the card plate 18. The staff can know the rotation angle of the guide tube 14 by understanding the rotation angle of the guide tube 14 and can select the appropriate rotation angle according to the approximate oil pressure in the hydraulic lock body 1; During the rotation of the passive gear 6, the bracket 8 provided on the side wall of the passive gear 6 will drive the guide tube 14 to rotate together, and at the same time, the card plate 18 on the side wall of the bracket 8 will also rotate at the same time. Since the connecting rod 21 is fixedly provided on the side wall of the protrusion 7, the rotating card plate 18 will move to the position of the wedge block 23 on the side wall of the top plate 22, and the wedge block 23 will push the card plate 18 down toward the block 19. When the card plate 18 rotates around the support rod 17, the torsion spring 24 is compressed, and the card plate 18 will clamp the position of the block 19, thereby fixing the collection tank 15 under the restriction of the card plate 18, thereby preventing it from being accidentally removed; When the guide tube 14 rotates, the rotating plate 34 at the other end of the guide tube 14 will rotate relative to the fixed plate 33, so that the rotating hole 38 on the side wall of the rotating plate 34 gradually aligns with the fixed hole 37 on the side wall of the fixed plate 33. The oil sample confined in the tube body 30 will enter the guide tube 14 from the gap between the two and enter the collection tank 15 through the connecting pipe 41. The oil sample entering the collection tank 15 will push up the piston 42, and the identification rod 43 fixed on the side wall of the piston 42 will extend out of the collection tank 15, and the second piston 42 set on the side wall of the piston 42 will be compressed, thereby reducing the oil pressure entering the collection tank 15.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A hydraulic system pressure relief device containing a hydraulic lock, comprising a hydraulic lock body (1), characterized in that: Also includes: A dual-axis motor (2) is fixedly provided on the side wall of the hydraulic lock body (1), and an extension rod (3) is fixedly provided on the two output ends of the dual-axis motor (2), and a driving gear (4) is fixedly provided on one end of the extension rod (3) away from the dual-axis motor (2). Fixed blocks (5) are respectively provided on the side walls of both sides of the hydraulic lock body (1), and a passive gear (6) is rotatably connected to the side wall of the fixed block (5). The passive gear (6) is hollow in design, and a protrusion (7) is fixedly provided on the side wall of the fixed block (5). The passive gear (6) meshes with the active gear (4), and a bracket (8) is fixedly provided on the side wall of the passive gear (6); The hydraulic lock body (1) is provided with two oil outlets (9) at the top, and two oil inlets (10) at the bottom. The hydraulic lock body (1) is provided with two symmetrical motion chambers (11). The top of the motion chamber (11) is communicated with the oil outlet (9), and the bottom is communicated with the oil inlet (10). An intermediate chamber (12) is communicated between the two motion chambers (11). A valve core (13) is slidably connected in the intermediate chamber (12). A blocking valve is slidably connected in the motion chamber (11). A plurality of guide tubes (14) are provided in the blocking valve. The plurality of guide tubes (14) respectively pass through the side wall of the hydraulic lock body (1). The guide tubes (14) are "L"-shaped. The side wall of the guide tube (14) is clamped to the side wall of the bracket (8). A collection tank (15) is provided at the other end of the guide tube (14).

2. The hydraulic system pressure relief device with a hydraulic lock according to claim 1, characterized in that: The side wall of the bracket (8) is provided with an arc groove (16), the guide tube (14) is arranged inside the arc groove (16), the side wall of the bracket (8) is rotatably connected to a support rod (17), the side wall of the support rod (17) is fixedly provided with a clamping plate (18), the side wall of the collection tank (15) is fixedly provided with a clamping block (19), the side wall of the clamping plate (18) is provided with a clamping hole (20), and the position of the clamping hole (20) corresponds to the position of the clamping block (19).

3. The hydraulic system pressure relief device with a hydraulic lock according to claim 2, characterized in that: The side wall of the protrusion (7) is fixedly connected to a connecting rod (21), the other end of the connecting rod (21) is fixedly connected to a top plate (22), and a plurality of wedge blocks (23) are fixedly provided on the side wall of the top plate (22), and each of the wedge blocks (23) abuts against the side wall of the corresponding clamping plate (18).

4. The hydraulic system pressure relief device with a hydraulic lock according to claim 2, characterized in that: A torsion spring (24) is wound around the outside of the support rod (17), one end of the torsion spring (24) is fixedly connected to the side wall of the bracket (8), and the other end is fixedly connected to the side wall of the clamping plate (18).

5. The hydraulic system pressure relief device with a hydraulic lock according to claim 3, characterized in that: The side wall of the card plate (18) away from the connecting rod (21) is rotatably connected to a transparent plate (25), and the side wall of the transparent plate (25) is fixedly provided with a scale line (26). The side wall of the card plate (18) is also provided with a scale line (26), and the scale line (26) is annularly provided on the side wall of the transparent plate (25). A push plate (27) is fixedly provided on the side wall of the transparent plate (25), and a through hole (28) is opened on the side wall of the push plate (27). The side wall of the driving gear (4) is fixedly connected to a fixing rod (29), and the fixing rod (29) passes through the through hole (28).

6. The hydraulic system pressure relief device with a hydraulic lock according to claim 1, characterized in that: The blocking valve comprises a tube body (30), a sealing plate (31), a push rod (32), a fixed plate (33), a rotating plate (34) and a first spring (35). The tube body (30) is slidably connected in the motion cavity (11). The tube body (30) is hollow in design. A plurality of through holes (36) are provided on the side wall of the tube body (30). The sealing plate (31) is slidably connected to the inner wall of the tube body (30). The outer diameter of the sealing plate (31) is consistent with the inner diameter of the tube body (30). The push rod (32) is fixedly connected to the side wall of the sealing plate (31). The first spring (35) is fixedly arranged on the push rod (32). The fixed plate (33) is fixedly arranged on the side wall of the push rod (32) between the moving rod (32) and the side wall of the moving cavity (11). The side wall of the fixed plate (33) is provided with a plurality of fixing holes (37). The rotating plate (34) is rotatably connected to the side wall of the fixed plate (33). The side wall of the rotating plate (34) is provided with a plurality of rotating holes (38). The number and aperture of the rotating holes (38) are the same as those of the fixed holes (37). Each of the rotating holes (38) is respectively connected to a guide tube (14). The side wall of the protrusion (7) is provided with a moving groove (39) for the guide tube (14) to rotate.

7. The hydraulic system pressure relief device with a hydraulic lock according to claim 6, characterized in that: The two ends of the valve core (13) respectively abut against the side walls of the two sealing plates (31); the outer diameter of the push rod (32) is smaller than the outer diameter of the sealing plate (31); the outer diameter of the rotating plate (34) is consistent with the outer diameter of the fixed plate (33); and the outer diameter of the fixed plate (33) is also consistent with the inner diameter of the tube body (30).

8. The hydraulic system pressure relief device with a hydraulic lock according to claim 6, characterized in that: The end of the sealing plate (31) facing away from the push rod (32) is designed as an arc surface, and a pressure relief hole (40) is provided on the side wall of the sealing plate (31).

9. The hydraulic system pressure relief device with a hydraulic lock according to claim 1, characterized in that: The bottom of the collecting tank (15) is connected to a connecting pipe (41), the connecting pipe (41) is threadedly connected to the guide pipe (14), the inner wall of the collecting tank (15) is slidably connected to a piston (42), the side wall of the piston (42) away from the connecting pipe (41) is fixedly connected to an identification rod (43), and the other end of the identification rod (43) passes through the side wall of the collecting tank (15).

10. The hydraulic system pressure relief device with a hydraulic lock according to claim 9, characterized in that: A second spring (44) is wound around the outside of the identification rod (43), and the other end of the second spring (44) is fixedly connected to the top of the collection tank (15). The identification rod (43) extends out of the side wall of one end of the collection tank (15), and a top cap (45) is fixedly provided.

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