Pushing oil cylinder for hydraulic support and using method

Abstract

The invention relates to a pushing oil cylinder for a hydraulic support and a using method, and belongs to the technical field of hydraulic oil cylinders, the pushing oil cylinder comprises a pushing oil cylinder assembly, the two ends of the pushing oil cylinder assembly are provided with a lower oil channel and an upper oil channel respectively, the outside of the pushing oil cylinder assembly is connected with a control assembly, and the control assembly comprises an oil supply assembly and a motor. The oil supply assembly comprises a pump shell, the upper end and the lower end of the pump shell are in through connection with oil pipes, the oil pipe at the upper end is in through connection with the upper oil channel, and the oil pipe at the lower end is in through connection with the lower oil channel. An impeller is rotationally arranged in the pump shell, arc-shaped grooves are formed in the two sides of the impeller in the blade rotating direction in a concave mode, a center shaft of the impeller penetrates out of the pump shell, and the motor drives the center shaft to rotate. The pushing oil cylinder does not need to be driven through a hydraulic oil station, so that the requirement for the space needed for installation is reduced, and meanwhile the use and purchase cost is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic cylinders, and specifically relates to a push cylinder for a hydraulic support and a method of use. Background Art

[0002] The push cylinder controls the internal hydraulic oil to push the piston to achieve the telescopic action of the telescopic rod, and then acts as a driving component to provide power for the hydraulic support. Existing push cylinders are supplied with hydraulic oil through hydraulic oil stations. Hydraulic oil stations occupy a large area, and some areas have limited space, which makes it inconvenient to arrange hydraulic oil stations. If the hydraulic oil station controls the action of only one push cylinder, the use and procurement costs of the push cylinder will be greatly increased. Summary of the invention

[0003] The technical problem to be solved by the present application is: to overcome the deficiencies of the prior art and to provide a push cylinder for a hydraulic support and a method of use. The push cylinder of the present application does not need to be driven by a hydraulic oil station, thereby reducing the space requirement for installation, and also reducing the use and procurement costs.

[0004] The technical solution adopted by this application to solve the problems existing in the prior art is:

[0005] A push cylinder for a hydraulic support includes a push cylinder assembly, wherein two ends of the push cylinder assembly are respectively provided with a lower oil passage and an upper oil passage, and the push cylinder assembly is externally connected to a control assembly, wherein the control assembly includes an oil supply assembly and a motor.

[0006] The oil supply assembly comprises a pump housing, and oil pipes are connected through the upper and lower ends of the pump housing. The oil pipe at the upper end is connected through the upper oil passage, and the oil pipe at the lower end is connected through the lower oil passage.

[0007] An impeller is rotatably arranged inside the pump casing, arc grooves are concavely arranged on both sides of the impeller blades in the rotation direction, the central axis of the impeller is passed through the outside of the pump casing, and the motor drives the central axis to rotate.

[0008] Preferably, the oil pipe and the pump casing are connected through a reducer.

[0009] Preferably, the end of the oil pipe facing away from the pump housing is connected with a connecting block, the connecting block is detachably connected to the push cylinder assembly, an oil storage chamber is provided inside the connecting block, the oil pipe is connected with the oil storage chamber, and the oil storage chamber is connected with the lower oil channel and the upper oil channel through a plug.

[0010] Preferably, the push cylinder assembly includes a cylinder, a lower fastening block is provided below the cylinder, an upper fastening block is provided above the cylinder, the piston assembly is slidably arranged inside the cylinder, one end of the lower oil channel located inside the lower fastening block is through-connected with the cylinder, and one end of the upper oil channel located inside the upper fastening block is through-connected with the cylinder.

[0011] Preferably, the end surfaces of the lower fastening block and the upper fastening block facing the cylinder are both provided with annular slots, and the two ends of the cylinder are inserted into the two slots. The lower fastening block and the upper fastening block are detachably connected by fastening bolts.

[0012] Preferably, the end surface of the lower fastening block is recessed with a lower plug hole which is through-connected with the lower oil passage, and the plug pipe of the lower connecting block is inserted into the lower plug hole.

[0013] An upper plug hole which is connected to the upper oil passage is concavely arranged on the end surface of the upper fastening block, and a plug pipe of the upper connecting block is inserted into the upper plug hole.

[0014] Preferably, the piston assembly includes a piston and a piston rod coaxially fixedly connected thereto, two annular grooves are arranged on the circumferential surface of the piston at intervals, a sealing ring is arranged in the annular groove, a plurality of oil leakage inlet passages are arranged inside the piston, the inlet of the oil leakage inlet passage is located between the two annular grooves, a plurality of oil leakage drain passages are arranged inside the piston rod located outside, the outlet of the oil leakage drain passage is located on the circumferential surface of the piston rod, and the oil leakage inlet passage and the oil leakage drain passage are connected by a connecting oil passage.

[0015] The piston rod is externally sleeved with a transparent oil leakage detection cover, which is arranged at the outlet of the oil leakage discharge channel.

[0016] Preferably, the motor and the central shaft are connected via a control box, and the control box can control the central shaft to rotate forward or reverse when the motor direction remains unchanged.

[0017] A method for using a push cylinder for a hydraulic support, based on the above-mentioned push cylinder for a hydraulic support, includes a push cylinder assembly, and includes the following steps:

[0018] S01. First fill the push cylinder assembly and the oil supply assembly with hydraulic oil.

[0019] S02. Start the motor to drive the impeller to rotate forward. The impeller drives the hydraulic oil to flow. The hydraulic oil above the piston inside the cylinder flows into the area below the piston inside the cylinder through the upper oil channel, oil pipe, pump casing, oil pipe and lower oil channel, thereby pushing the piston assembly upward. The piston rod pushes the hydraulic support to lift. After the hydraulic support reaches the specified position, the impeller is fixed.

[0020] S03. When the hydraulic support needs to be lowered, the motor drives the impeller to reverse, the hydraulic oil above the piston inside the cylinder increases, and the hydraulic oil below decreases, causing the piston rod to retract and the hydraulic support to descend.

[0021] Preferably, after the sealing ring on the piston is damaged and leaks, the hydraulic oil flows into the oil leakage inlet channel between the two sealing rings, and then flows into the transparent oil leakage detection cover through the connecting oil channel and the oil leakage discharge channel. The integrity of the sealing ring can be judged by observing whether there is hydraulic oil inside the oil leakage detection cover.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The push cylinder does not need to be driven by a hydraulic oil station, thereby reducing the space required for installation and also reducing the use and procurement costs.

[0024] (2) The sealing condition of the piston seal ring can be detected in real time. When the seal ring is damaged, hydraulic oil will appear inside the oil leakage detection cover, which is convenient for timely detection and replacement of the seal ring to ensure the use effect of the push cylinder.

[0025] (3) By changing the direction of the impeller through the control box while keeping the direction of the motor unchanged, the use effect of the motor can be optimized and the energy consumption can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 This is a structural diagram of a hydraulic support push cylinder.

[0028] Figure 2 This is a structural diagram of a push cylinder assembly in a push cylinder for a hydraulic support in this application.

[0029] Figure 3 This is a first cross-sectional view of a push cylinder assembly in a push cylinder for a hydraulic support of the present application.

[0030] Figure 4 for Figure 3 A partial enlarged view of the middle A.

[0031] Figure 5 for Figure 3 A partial enlarged view of point B in the middle.

[0032] Figure 6 This is a second cross-sectional view of a push cylinder assembly in a push cylinder for a hydraulic support of the present application.

[0033] Figure 7 for Figure 6 A partial enlarged view of point C in the middle.

[0034] Figure 8 This is a third cross-sectional view of a push cylinder assembly in a push cylinder for a hydraulic support of the present application.

[0035] Fig. 9 This is a cross-sectional view of a push cylinder assembly in a push cylinder for a hydraulic support of the present application.

[0036] Fig.10 This is the first structural diagram of a hydraulic oil control component in a hydraulic cylinder for a hydraulic support in this application.

[0037] Fig.11 This is the second structural diagram of a hydraulic oil control assembly in a hydraulic cylinder for a hydraulic support in this application.

[0038] Fig.12 This is a structural diagram of a hydraulic oil supply assembly in a hydraulic cylinder for a hydraulic support.

[0039] Fig.13 This is a first cross-sectional view of a hydraulic oil supply assembly in a hydraulic cylinder for a hydraulic support of the present application.

[0040] Fig.14 This is a second cross-sectional view of a hydraulic oil supply assembly in a hydraulic cylinder for a hydraulic support of the present application.

[0041] Fig.15 This is a structural diagram of a hydraulic oil control box in a hydraulic cylinder for a hydraulic support.

[0042] Fig.16 This is a partial cross-sectional view of a control box in a hydraulic oil cylinder for a hydraulic support in this application.

[0043] Fig.17 This is a structural diagram of the impeller assembly inside the control box in the hydraulic oil of a hydraulic support push cylinder.

[0044] Fig.18 This is a diagram of the internal control gear set structure of a hydraulic support in a hydraulic oil cylinder.

[0045] Fig.19 for Fig.18 A cross-sectional view of

[0046] Fig. 20 for Fig.18 Exploded diagram of .

[0047] In the figure: 1-cylinder, 2-lower fastening block, 201-lower oil passage, 202-lower plug hole, 203-lower convex ring, 3-upper fastening block, 301-upper oil passage, 302-upper plug hole, 303-upper convex ring, 304-cavity, 4-piston assembly, 401-piston, 402-piston rod, 403-leakage oil inlet passage, 404-connecting oil passage, 405-leakage oil discharge passage, 406-support flange, 5-sealed bearing, 6-upper cover, 7-oil leakage detection cover, 8-fastening bolts, 9-sealing ring, 10-pump housing, 11-reducing pipe, 12-oil pipe, 13-connecting block , 1301-oil storage chamber, 1302-insertion tube, 14-impeller, 1401-blade, 1402-center axis, 15-first rotating shaft, 16-driven gear, 17-driven sprocket, 18-locking disk, 1801-locking hole, 19-second rotating shaft, 20-sliding tube, 2001-chuck, 2002-tooth key sleeve, 21-driving gear, 22-driving sprocket, 23-chain, 24-slide plate, 25-first telescopic rod, 26-first electric telescopic mechanism, 27-box, 28-motor, 29-second electric telescopic mechanism, 2901-second telescopic rod. DETAILED DESCRIPTION

[0048] In conjunction with the accompanying drawings, a push cylinder for a hydraulic support of the present application and a method of use are further described in detail, but this does not limit the present application.

[0049] Depend on Figures 1 to 20 As shown, a push cylinder for a hydraulic support includes a push cylinder assembly and a control assembly. The control assembly includes an oil supply assembly, a control box and a motor 28. The control assembly is arranged on the outside of the push oil pipe assembly, and the two are detachably connected.

[0050] Depend on Figures 2 to 9 As shown, the push cylinder assembly includes a cylinder 1 with open ends and a piston assembly 4. A lower fastening block 2 is provided below the cylinder 1, an upper fastening block 3 is provided above the cylinder 1, and the piston assembly 4 is slidably arranged inside the cylinder 1. One end of the lower oil passage 201 located inside the lower fastening block 2 is connected to the cylinder 1, and one end of the upper oil passage 301 located inside the upper fastening block 3 is connected to the cylinder 1.

[0051] In order to facilitate assembly and maintenance, the cylinder 1, the lower fastening block 2, the upper fastening block 3 and the piston assembly 4 can all be detachably connected.

[0052] The lower fastening block 2 and the upper fastening block 3 are provided with annular slots on their end faces facing the cylinder 1, and the two ends of the cylinder 1 are inserted into the two slots. The lower fastening block 2 and the upper fastening block 3 are detachably connected by fastening bolts 8. A lower convex ring 203 is provided inside the annular slot of the lower fastening block 2, and an upper convex ring 303 is provided inside the annular slot of the upper fastening block 3. The outer diameters of the lower convex ring 203 and the upper convex ring 303 are the same as the inner diameter of the cylinder 1, and they are plugged into each other. The lower convex ring 203 and the upper convex ring 303 play a limiting role, and now the upper dead center and the lower dead center of the piston 401 in the piston assembly 4.

[0053] The piston assembly 4 comprises a piston 401 and a piston rod 402 coaxially fixedly connected thereto. Figure 4 as well as Figure 8 As shown, the piston 401 is provided with two annular grooves at intervals on its circumferential surface, a sealing ring 9 is provided in the annular groove, and a plurality of oil leakage inlet passages 403 are provided inside the piston 401, and the entrance of the oil leakage inlet passages 403 is located between the two annular grooves. Figure 7 As shown, a plurality of oil leakage and drain passages 405 are provided inside the external piston rod 403 , the outlets of the oil leakage and drain passages 405 are located on the circumferential surface of the piston rod 403 , and the oil leakage inlet passages 403 and the oil leakage and drain passages 405 are connected through a connecting oil passage 404 .

[0054] The piston rod 402 is covered with a transparent oil leakage detection cover 7. The inner wall of the oil leakage detection cover 7 is spaced apart from the circumferential surface of the piston rod 402 to form a chamber for accommodating hydraulic oil. The oil leakage detection cover 7 is arranged at the outlet of the oil leakage drain channel 405.

[0055] Since the sealing ring 9 is a consumable part with a certain service life, the sealing ring 9 is prone to damage when the number of times the piston 401 slides up and down reaches a threshold. However, since the number of times the piston 401 slides is difficult to count, the number of times the sliding reaches the threshold only increases the risk of damage to the sealing ring 9 but does not necessarily damage it. Replacing the sealing ring 9 during the maintenance cycle may cause the sealing ring 9 to be damaged before the maintenance cycle, affecting the use effect. In this embodiment, through the above structure, the sealing condition of the sealing ring 9 can be detected in real time. If the sealing ring 9 is damaged, hydraulic oil will appear inside the oil leakage detection cover 7, which is convenient for timely detection and replacement of the sealing ring 9 to ensure the use effect of the push cylinder.

[0056] The piston rod 402 is fixed with an oil support flange 406, and the oil leakage detection cover 7 is detachably connected to the support flange 406 by bolts.

[0057] Depend on Figure 5As shown, the upper fastening block 3 is provided with a through hole in the middle for passing the piston rod 402. The inner diameter of the through hole is larger than the outer diameter of the piston rod 402, and the inner wall of the through hole is provided with bearing slots on both the upper and lower sides, and the bearing slots are provided with sealed bearings 5, and a cavity 304 is provided between the two sealed bearings 5. The sealed bearings 5 ​​are sleeved on the piston rod 402, and the through hole is covered by an upper cover 6.

[0058] The hydraulic oil inside the cylinder 1 is sealed by the upper and lower sealing bearings 5, which optimizes the sealing effect of the hydraulic oil. If the lower sealing bearing 5 leaks, the leaked hydraulic oil flows into the cavity 304 through the gap between the lower sealing bearing 5 and the piston rod 402 or the through hole of the upper fastening block 3. During the inflow process, the pressure of the hydraulic oil is reduced due to the resistance along the way, further ensuring the sealing effect of the upper sealing bearing 5.

[0059] Depend on Figure 12 to Figure 14 As shown, the oil supply assembly includes a pump housing 10, and the upper and lower ends of the pump housing 10 are connected with oil pipes 12, the upper end of the oil pipe 12 is connected to the upper oil passage 301, and the lower end of the oil pipe 12 is connected to the lower oil passage 201. In order to reduce the flow resistance at the connection between the pump housing 10 and the oil pipe 12 and avoid the formation of vortex, the oil pipe 12 and the pump housing 10 are connected through a reducer 11.

[0060] The pump housing 10 is provided with an impeller 14 for rotation inside, and arc grooves are provided on both sides of the blades 1401 of the impeller 14 in the rotation direction, and the arc grooves on both sides enable the impeller 14 to well push the hydraulic oil out of the pump housing and into the oil pipe 12 during the forward and reverse rotation. The through connection between the reducer 11 and the pump housing 10 is arranged tangentially to the pump housing 10, so that the hydraulic oil can leave the pump housing 10 and enter the reducer 11.

[0061] The end of the oil pipe 12 facing away from the pump housing 10 is connected with a connecting block 13, and the connecting block 13 is detachably connected to the push cylinder assembly. An oil storage chamber 1301 is provided inside the connecting block 13, and the oil pipe 12 is connected with the oil storage chamber 1301. The oil storage chamber 1301 is connected with the lower oil channel 201 and the upper oil channel 301 through the insert 1302.

[0062] In order to improve the sealing performance, the end surface of the lower fastening block 2 is concavely provided with a lower plug hole 202 which is connected to the lower oil passage 201, and the plug pipe 1302 of the lower connecting block 13 is inserted into the lower plug hole 202. The end surface of the upper fastening block 3 is concavely provided with an upper plug hole 302 which is connected to the upper oil passage 301, and the plug pipe 1302 of the upper connecting block 13 is inserted into the upper plug hole 302.

[0063] The upper and lower connecting blocks 13 are detachably connected to the upper fastening block 3 and the lower fastening block 2 respectively by bolts.

[0064] Depend on Figures 15 to 20 As shown, the central axis 1402 of the impeller 14 passes through the outside of the pump housing 10, and the motor 28 drives the central axis 1402 to rotate.

[0065] Since the flow direction of the hydraulic oil is changed by changing the rotation direction of the impeller 14, the piston assembly 4 is controlled to move up and down. If the rotation direction of the impeller 14 is changed by changing the current direction of the motor 10, there are the following disadvantages:

[0066] 1. Starting characteristics: When changing the direction of the current and starting the motor, there may be a brief dynamic process during which the motor torque may fluctuate, but these effects usually disappear once the motor runs stably.

[0067] 2. Mechanical system: If the motor is driving a mechanical load, then a sudden change in direction may cause an impact on the transmission system, which may affect the efficiency of the system or even cause mechanical damage.

[0068] 3. Control circuit: Changing the direction of current needs to be achieved through the control circuit. If the control circuit is not designed properly, additional energy loss may be introduced, thus affecting the overall efficiency of the motor.

[0069] 4. Hysteresis effect: In some types of motors, especially those using permanent magnets, repeated changes in the direction of the current may lead to increased hysteresis losses, which may affect the efficiency of the motor in the long run.

[0070] Therefore, in this embodiment, the motor 28 is connected to the central shaft 1402 via a control box. When the direction of the motor 28 remains unchanged, the control box can control the central shaft 1402 to rotate forward or reverse.

[0071] The control box includes a box body 27, and a regulating gear set and an impeller assembly are arranged inside the box body 27. The impeller assembly includes a first rotating shaft 15 coaxially fixedly connected to the central axis 1402 of the impeller 14, and a driven gear 16 and a driven sprocket 17 coaxially connected are fixed on the first rotating shaft 15. The regulating gear set includes a second rotating shaft 19, and the second rotating shaft 19 is a spline shaft. A slide tube 20 is slidably connected to the second rotating shaft 19, and a driving gear 21 and a driving sprocket 22 are sleeved on the slide tube 20. The driving gear 21 is meshedly connected with the driven gear 16, and the driving sprocket 22 is connected to the driven sprocket 17 through a chain 23.

[0072] The driving gear 21 and the driving sprocket 22 are provided with tooth grooves in the middle, and the slide tube 20 is provided with a tooth key sleeve 2002. By sliding the slide tube 20, the tooth key sleeve 2002 can be meshed and connected with the tooth grooves in the middle of the driving gear 21 or the driving sprocket 22 in sequence, so that the driving gear 21 or the driving sprocket 22 can be driven to rotate respectively during the rotation of the second rotating shaft 19. Then, the direction of the impeller 14 is changed when the direction of the motor 28 remains unchanged.

[0073] A chuck 2001 is provided at the end of the sliding tube 20 , a slide plate 24 is clamped inside the chuck 2001 , a first electric telescopic mechanism 26 is fixed outside the box 27 , and a first telescopic rod 25 of the first electric telescopic mechanism 26 is fixedly connected to the slide plate 24 .

[0074] In order to prevent the slide plate 24 from deflecting, a through hole is provided on the slide plate 24, and the through hole is sleeved on the first rotating shaft 15. The first telescopic rod 25 is connected to the slide plate 24 at a position between the first rotating shaft 15 and the sliding tube 20.

[0075] In order to prevent the impeller 14 from rotating without driving the hydraulic oil to flow, a locking plate 18 is fixed to the first rotating shaft 15, and a plurality of locking holes 1801 are provided on the circumferential surface of the locking plate 18. A second electric telescopic mechanism 29 is fixed to the box body 27, and a second telescopic rod 2901 of the second electric telescopic mechanism 29 is arranged opposite to the locking hole 1801.

[0076] In this embodiment, the second electric telescopic mechanism 29 adopts an electromagnet. When the electromagnet is powered off, the second telescopic rod 2901 is extended by the spring and extends into the locking hole 1801 to lock the locking disk 18 to prevent it from rotating. After power is turned on, the second telescopic rod 2901 is retracted and the locking disk 18 can rotate freely.

[0077] A method for using a push cylinder for a hydraulic support, based on the above-mentioned push cylinder for a hydraulic support, includes a push cylinder assembly, and includes the following steps:

[0078] S01, first fill the hydraulic oil into the push cylinder assembly and the oil supply assembly;

[0079] S02, start the motor 28, drive the impeller 14 to rotate forward, the impeller 14 drives the hydraulic oil to flow, the hydraulic oil in the cylinder 1 above the piston 401 flows into the cylinder 1 below the piston 401 through the upper oil channel 302, the oil pipe 12, the pump housing 10, the oil pipe 12 and the lower oil channel 201, and then pushes the piston assembly 4 to move upward, the piston rod 402 pushes the hydraulic support to lift, and after the hydraulic support reaches the specified position, the impeller 14 is fixed;

[0080] S03. When the hydraulic support needs to be lowered, the motor 28 drives the impeller 14 to reverse, the hydraulic oil above the piston 401 inside the cylinder 1 increases, and the hydraulic oil below decreases, so that the piston rod 402 retracts and the hydraulic support descends.

[0081] After the sealing ring 9 on the piston 401 is damaged and leaks, the hydraulic oil flows into the oil leakage inlet channel 403 between the two sealing rings 9, and then flows into the transparent oil leakage detection cover 7 through the connecting oil channel 404 and the oil leakage discharge channel 405. The integrity of the sealing ring 9 can be judged by observing whether there is hydraulic oil inside the oil leakage detection cover 7.

[0082] The implementation methods of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A push cylinder for a hydraulic support, comprising a push cylinder assembly, characterized in that: The two ends of the push cylinder assembly are respectively provided with a lower oil channel (201) and an upper oil channel (301); the push cylinder assembly is externally connected to a control assembly, and the control assembly includes an oil supply assembly and a motor (28); The oil supply assembly comprises a pump housing (10), and the upper and lower ends of the pump housing (10) are both connected with oil pipes (12), the upper end of the oil pipe (12) is connected with the upper oil channel (301), and the lower end of the oil pipe (12) is connected with the lower oil channel (201); An impeller (14) is rotatably arranged inside the pump housing (10), arc grooves are concavely arranged on both sides of the blades (1401) of the impeller (14) in the rotation direction, and the central axis (1402) of the impeller (14) passes through the outside of the pump housing (10), and the motor (28) drives the central axis (1402) to rotate.

2. A hydraulic support push cylinder according to claim 1, comprising a push cylinder assembly, characterized in that: The oil pipe (12) and the pump housing (10) are connected through a reducer (11).

3. The hydraulic support push cylinder according to claim 1, comprising a push cylinder assembly, characterized in that: The end of the oil pipe (12) facing away from the pump housing (10) is connected to a connecting block (13), the connecting block (13) is detachably connected to the push cylinder assembly, an oil storage chamber (1301) is provided inside the connecting block (13), the oil pipe (12) is connected to the oil storage chamber (1301), and the oil storage chamber (1301) is connected to the lower oil channel (201) and the upper oil channel (301) via a plug (1302).

4. A push cylinder for a hydraulic support according to claim 3, comprising a push cylinder assembly, characterized in that: The push cylinder assembly comprises a cylinder (1), a lower fastening block (2) is provided below the cylinder (1), an upper fastening block (3) is provided above the cylinder (1), a piston assembly (4) is slidably arranged inside the cylinder (1), one end of a lower oil passage (201) located inside the lower fastening block (2) is connected to the cylinder (1), and one end of an upper oil passage (301) located inside the upper fastening block (3) is connected to the cylinder (1).

5. The hydraulic support push cylinder according to claim 4, comprising a push cylinder assembly, characterized in that: The end surfaces of the lower fastening block (2) and the upper fastening block (3) facing the cylinder (1) are both provided with annular slots, and the two ends of the cylinder (1) are inserted into the two slots. The lower fastening block (2) and the upper fastening block (3) are detachably connected via fastening bolts (8).

6. A push cylinder for a hydraulic support according to claim 4 or 5, comprising a push cylinder assembly, characterized in that: The end surface of the lower fastening block (2) is concavely provided with a lower plug hole (202) which is connected to the lower oil passage (201), and the plug pipe (1302) of the lower connecting block (13) is inserted into the lower plug hole (202); The end surface of the upper fastening block (3) is concavely provided with an upper plug hole (302) which is connected to the upper oil passage (301), and the insert pipe (1302) of the upper connecting block (13) is inserted into the upper plug hole (302).

7. A push cylinder for a hydraulic support according to claim 4 or 5, comprising a push cylinder assembly, characterized in that: The piston assembly (4) comprises a piston (401) and a piston rod (402) coaxially fixedly connected thereto. Two annular grooves are arranged on the circumferential surface of the piston (401) at intervals, and a sealing ring (9) is arranged in the annular groove. A plurality of leakage oil inlet passages (403) are arranged inside the piston (401), and the entrance of the leakage oil inlet passage (403) is located between the two annular grooves. A plurality of leakage oil drain passages (405) are arranged inside the piston rod (403) located outside, and the outlet of the leakage oil drain passage (405) is located on the circumferential surface of the piston rod (403). The leakage oil inlet passage (403) and the leakage oil drain passage (405) are connected through a connecting oil passage (404). The piston rod (402) is externally sleeved with a transparent oil leakage detection cover (7), and the oil leakage detection cover (7) is arranged at the outlet of the oil leakage discharge channel (405).

8. A push cylinder for a hydraulic support according to any one of claims 1 to 5, comprising a push cylinder assembly, characterized in that: The motor (28) and the central shaft (1402) are connected via a control box. When the direction of rotation of the motor (28) remains unchanged, the control box can control the central shaft (1402) to rotate forward or reverse.

9. A method for using a hydraulic support push cylinder, based on the hydraulic support push cylinder of claim 7, comprising a push cylinder assembly, characterized in that: The following steps are involved: S01, first fill the hydraulic oil into the push cylinder assembly and the oil supply assembly; S02, starting the motor (28) to drive the impeller (14) to rotate forward, the impeller (14) drives the hydraulic oil to flow, and the hydraulic oil in the cylinder (1) above the piston (401) flows into the cylinder (1) below the piston (401) through the upper oil channel (302), the oil pipe (12), the pump housing (10), the oil pipe (12) and the lower oil channel (201), thereby pushing the piston assembly (4) to move upward, and the piston rod (402) pushes the hydraulic support to rise. After the hydraulic support reaches the specified position, the impeller (14) is fixed; S03. When the hydraulic support needs to be lowered, the motor (28) drives the impeller (14) to reverse, the hydraulic oil above the piston (401) inside the cylinder (1) increases, and the hydraulic oil below decreases, so that the piston rod (402) retracts and the hydraulic support descends.

10. The method for using the push cylinder for a hydraulic support according to claim 9, characterized in that: When the sealing ring (9) on the piston (401) is damaged and leaks, the hydraulic oil flows into the oil leakage inlet passage (403) between the two sealing rings (9), and then flows into the transparent oil leakage detection cover (7) through the connecting oil passage (404) and the oil leakage discharge passage (405). The integrity of the sealing ring (9) can be judged by observing whether there is hydraulic oil inside the oil leakage detection cover (7).

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