Auxiliary retraction device for hydraulic single prop

Abstract

The invention provides an auxiliary retraction device for a hydraulic single prop. The device comprises a fixed base, a telescopic table and a jack, the fixed base is used for supporting the device; the telescopic table is arranged on the fixed base, and the jack is connected with the telescopic table; a limiting plate is arranged at one end of the telescopic table; the jack is operated in a long-distance liquid supply mode, and an anti-collapse limiting rod is arranged on the upper portion of the jack. The anti-collapse limiting rod is arranged on a piston rod of the jack and moves along with stretching and retracting of the piston rod. A single block-up device is further arranged between the fixed base and the telescopic table. One end of the single block-up device is connected with the fixed base, and the other end is connected with the telescopic table. The limiting plate is arranged at one end of the telescopic table, and the internal length of the device can be flexibly changed by adjusting the position of the limiting plate, so that the device can adapt to retraction work of hydraulic single props with different lengths, and the retraction requirements of single props of various specifications in an underground coal mine are met.

Description

Technical Field

[0001] This application relates to the technical field of coal mines, and particularly to a hydraulic single prop auxiliary retraction device. Background Art

[0002] After the mining operation of a fully mechanized coal mining face is completed, it is necessary to retract the used hydraulic single props so as to transfer them to other working areas for recycling. This is a key link to ensure the efficient production of coal mines and reduce costs. During the retraction process, the hydraulic single props must be retracted safely, quickly and completely to ensure their normal use in the future, and at the same time avoid potential safety threats to the face equipment and personnel due to improper retraction. Efficient retraction operations are of great significance for improving the overall mining efficiency of coal mines and ensuring safe production.

[0003] At present, when dealing with hydraulic single props that are difficult to retract normally at the coal mine site, the main methods are manual retraction using a chain block and knocking with a sledgehammer. Manual retraction using a chain block utilizes the chain drive principle of the chain block. By manually pulling the chain by hand, the lifting sprocket is driven to rotate, and then the chain connected to the hydraulic single prop is pulled in an attempt to retract the movable column. When using a sledgehammer to knock, the operator directly hits the relevant components of the hydraulic single prop, hoping to retract the movable column by external force.

[0004] However, these traditional retraction methods have many defects. When manually retracting with a chain block, multiple workers are required to cooperate, resulting in extremely high labor intensity. Moreover, the operation process of the chain block is rather cumbersome and the efficiency is low. At the same time, during the operation, if the chain suddenly breaks or gets unhooked, it is extremely easy to cause safety accidents and pose a serious threat to the lives of the operators. The method of knocking with a sledgehammer not only has a high labor intensity, but also because it is difficult to accurately control the knocking force and position, it is easy to damage the hydraulic single prop, affecting its subsequent normal use, reducing the service life of the equipment, and increasing the equipment maintenance cost of the coal mine. In addition, neither of these two methods can ensure that the hydraulic single prop can be successfully retracted every time, with low reliability, seriously affecting the retraction efficiency of the fully mechanized coal mining face of the coal mine, restricting the safe production and efficient operation of the coal mine, and resulting in poor safety, low reliability and high labor intensity of the existing hydraulic single prop during retraction. Summary of the Invention

[0005] This application provides a hydraulic single prop auxiliary retraction device to solve the problems of poor safety, low reliability and high labor intensity of the existing retraction means when retracting hydraulic single props.

[0006] This application provides a hydraulic single prop auxiliary retraction device, including:

[0007] It includes a fixed base, a telescopic platform, and a jack; the fixed base is used to support the device;

[0008] The telescopic platform is arranged on the fixed base, and the jack is connected to the telescopic platform; one end of the telescopic platform is provided with a limit plate for adjusting the internal length of the device to adapt to hydraulic single props of different lengths; the jack is operated by a remote liquid supply method, and an anti-collapse limiting rod is provided on the upper part of the jack; the anti-collapse limiting rod is arranged on the piston rod of the jack and moves along with the telescopic movement of the piston rod;

[0009] A single prop heightening device is also arranged between the fixed base and the telescopic platform, and the single prop heightening device supports and stabilizes the telescopic platform by adjusting the height; one end of the single prop heightening device is connected to the fixed base, and the other end is connected to the telescopic platform.

[0010] In some possible implementation manners, an operation valve and a lock valve are also connected to one end of the jack. The operation valve is arranged at the hydraulic pipeline interface of the jack. The operation valve is used to control the flow direction of the hydraulic oil to control the telescopic movement of the jack; the lock valve is arranged at the oil port position of the jack, and the lock valve is used to be locked after the jack reaches the target position.

[0011] In some possible implementation manners, anti-slip patterns or rubber pads are provided at the bottom of the fixed base.

[0012] In some possible implementation manners, the device further includes a hydraulic oil filtration component, and the hydraulic oil filtration component is arranged on the hydraulic pipeline in front of the oil inlet of the jack for filtering the hydraulic oil entering the jack.

[0013] In some possible implementation manners, a buffer pad is installed at the part of the telescopic platform in contact with the hydraulic single prop.

[0014] In some possible implementation manners, the device further includes a positioning fixture, and the positioning fixture is arranged on the fixed base and the telescopic platform for adjusting and fixing the prop according to the shape and size of the hydraulic single prop.

[0015] In some possible implementation manners, the device further includes a quick-connect joint for hydraulic pipelines. The quick-connect joint for hydraulic pipelines is connected to the hydraulic pipeline of the jack in a pluggable or rotary manner for quickly completing the connection and disassembly of the hydraulic pipeline of the jack.

[0016] In some possible implementation manners, the monomer elevation device is a hydraulic lifting column or a spiral lifting mechanism. The monomer elevation device can flexibly adjust the overall height of the device according to actual requirements to ensure operation stability; the design of the quick-connection joint for the hydraulic pipeline greatly improves the installation and maintenance efficiency of the device and reduces the operation difficulty. Through the optimized structural design, the device significantly improves the safety and reliability of the prop withdrawal.

[0017] In some possible implementation manners, a liquid supply handle is further provided on the operation valve, and the liquid supply handle is connected to the operation valve through a lever. The liquid supply handle is designed to conform to ergonomics and is convenient to operate; the hydraulic lifting column has a self-locking function to ensure stability and reliability during the lifting process and avoid accidental slipping. The hydraulic pipeline is made of high-strength materials, resistant to pressure and wear, and prolongs the service life. All components are closely matched, and the overall structure is compact, facilitating carrying and installation. The operation is simple, greatly reducing the labor intensity of workers and improving work efficiency.

[0018] In some possible implementation manners, a labor-saving auxiliary mechanism is further provided on the liquid supply handle, and the labor-saving auxiliary mechanism is a gear transmission mechanism. The gear transmission mechanism can effectively reduce the operation force and improve work efficiency; the self-locking function of the hydraulic lifting column ensures safety and reliability during use and avoids accidental accidents caused by improper operation. The surfaces of all components are treated with anti-corrosion to adapt to various working environments and prolong the service life of the equipment. The overall design pays attention to details to ensure operation comfort and safety and further improves the user experience.

[0019] As can be seen from the above, the present application provides a hydraulic single prop auxiliary retraction device, including a fixed base, a telescopic platform, and a jack; the fixed base is used to support the device; the telescopic platform is arranged on the fixed base, and the jack is connected to the telescopic platform; one end of the telescopic platform is provided with a limit plate for adjusting the internal length of the device to adapt to hydraulic single props of different lengths; the jack is operated by a remote liquid supply method, and an anti-collapse limiting rod is provided on the upper part of the jack; the anti-collapse limiting rod is arranged on the piston rod of the jack and moves along with the telescopic movement of the piston rod; a single prop heightening device is further arranged between the fixed base and the telescopic platform, and the single prop heightening device supports and stabilizes the telescopic platform by adjusting the height; one end of the single prop heightening device is connected to the fixed base, and the other end is connected to the telescopic platform. In the present application, a limit plate is provided at one end of the telescopic platform. By adjusting the position of the limit plate, the internal length of the device can be flexibly changed, enabling the device to adapt to the retraction work of hydraulic single props of different lengths, meeting the retraction requirements of various specifications of single props in coal mines, expanding the application range of the device, and improving the versatility of the equipment. The anti-collapse limiting rod provided on the upper part of the jack of the device is installed on the piston rod and moves along with it. When the piston rod suddenly extends or malfunctions, it can limit the movement range of the piston rod, preventing damage to personnel and equipment caused by the ejection of jack components, and greatly improving the safety factor of on-site operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the hydraulic single prop auxiliary retraction device in the embodiments provided by the present application.

[0022] Illustration: 1 - Fixed base; 2 - Telescopic platform; 3 - Jack; 4 - Limit plate; 5 - Anti-collapse limiting rod; 6 - Single prop heightening device; 7 - Operating valve; 8 - Lock valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The embodiments will be described in detail below, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following examples do not represent all embodiments consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application detailed in the claims.

[0024] After the mining operation of the fully mechanized coal mining face is completed, it is necessary to retract the used hydraulic single props so as to transfer them to other working areas for recycling. This is a key link to ensure the efficient production of coal mines and reduce costs. During the retraction process, the hydraulic single props must be safely, quickly and completely retracted to ensure their normal use in the future. At the same time, it is necessary to avoid potential safety threats to the face equipment and personnel caused by improper retraction. Efficient retraction operations are of great significance for improving the overall mining efficiency of coal mines and ensuring safe production.

[0025] At present, when dealing with hydraulic single props that are difficult to retract normally at the coal mine site, the main methods are manual retraction using a chain block and hammering. Manual retraction using a chain block utilizes the chain drive principle of the chain block. By manually pulling the chain by hand, the hoisting sprocket is driven to rotate, and then the chain connected to the hydraulic single prop is pulled to try to retract the movable column. When using a hammer to strike, the operator directly uses a hammer to strike the relevant components of the hydraulic single prop, hoping to retract the movable column through external force.

[0026] However, these traditional retraction methods have many defects. When manually retracting using a chain block, multiple workers are required to cooperate, resulting in extremely high labor intensity. Moreover, the operation process of the chain block is relatively cumbersome and inefficient. At the same time, during the operation, if the chain suddenly breaks or disengages, it is extremely easy to trigger a safety accident, posing a serious threat to the lives of the operators. The method of using a hammer to strike not only has a high labor intensity, but also because it is difficult to accurately control the striking force and position, it is easy to damage the hydraulic single prop, affecting its subsequent normal use, reducing the service life of the equipment, and increasing the equipment maintenance cost of the coal mine. In addition, neither of these two methods can ensure that the hydraulic single prop can be successfully retracted every time, with low reliability, seriously affecting the retraction efficiency of the fully mechanized coal mining face of the coal mine, restricting the safe production and efficient operation of the coal mine, and resulting in poor safety, low reliability and high labor intensity of the existing hydraulic single props during retraction.

[0027] Based on this, to solve the problems of poor safety, low reliability and high labor intensity of the existing retraction methods for retracting hydraulic single props, as Figure 1 shown, this application provides an auxiliary retraction device for hydraulic single props.

[0028] The auxiliary retraction device for hydraulic single props includes:

[0029] It includes a fixed base 1, a telescopic platform 2, and a jack 3; the fixed base 1 is used to support the device;

[0030] The telescopic platform 2 is arranged on the fixed base 1, and the jack 3 is connected to the telescopic platform 2; one end of the telescopic platform 2 is provided with a limit plate 4, and the limit plate 4 is used to adjust the internal length of the device to adapt to hydraulic single props of different lengths; the jack 3 is operated by a remote liquid supply method, and an anti-collapse limiting rod 5 is arranged at the top of the jack 3; the anti-collapse limiting rod 5 is arranged on the piston rod of the jack 3 and moves along with the expansion and contraction of the piston rod.

[0031] A single prop heightening device 6 is further arranged between the fixed base 1 and the telescopic platform 2, and the single prop heightening device 6 supports and stabilizes the telescopic platform 2 by adjusting the height; one end of the single prop heightening device 6 is connected to the fixed base 1, and the other end is connected to the telescopic platform 2.

[0032] Before use, transport the hydraulic single prop auxiliary retraction device to the floor at the single prop recovery area of the working face, connect the jack and the hydraulic pipeline, and operate it by a remote liquid supply method. When in use, place the hydraulic single prop that cannot be normally retracted into the device, operate the liquid supply handle, supply liquid to the jack of the device, and the telescopic platforms on both sides slowly retract, driving the piston rod of the hydraulic single prop to retract. After the piston rod of the hydraulic single prop is completely retracted, lift the hydraulic single prop out of the device and load it for recovery.

[0033] The telescopic platform 2 can be adjusted according to hydraulic single props of different lengths, and can precisely adapt to various specifications of props in cooperation with the limit plate 4, improving the versatility and applicability of the device. The jack 3 is operated by a remote liquid supply method, enabling the operator to operate at a safe position away from the working area, avoiding potential dangers during the retraction process of the prop, and ensuring the safety of the operator. In addition, the design of the anti-collapse limiting rod 5 effectively prevents the jack 3 from cracking under high pressure, further enhancing the safety and reliability of the device. The anti-collapse limiting rod 5 is a ring structure sleeved on the piston rod, and its outer diameter is larger than the outlet diameter of the jack cylinder body. When the piston rod extends beyond the safe range, the anti-collapse limiting rod contacts the cylinder body to limit the continuous movement of the piston rod.

[0034] The adjustment function of the single prop heightening device 6 ensures the stability of the telescopic platform 2 at different heights, reduces the vibration and deviation during the operation process, and makes the retraction process of the hydraulic single prop smoother and more efficient.

[0035] The anti-collapse limiting rod 5 at the top of the jack 3 can effectively prevent the piston rod from accidentally popping out during the expansion and contraction process, further enhancing the safety of the device and reducing the potential safety hazards caused by equipment failures. The single prop heightening device 6 can support and stabilize the telescopic platform 2 by adjusting the height, enabling the device to adapt to different working scenarios and ground conditions, ensuring the stability and perpendicularity of the hydraulic single prop during the retraction process, and being conducive to improving work efficiency and quality.

[0036] In some embodiments, one end of the jack 3 is further connected with an operation valve 7 and a locking valve 8. The operation valve 7 is arranged at the hydraulic pipeline interface of the jack. The operation valve 7 is used to control the flow direction of hydraulic oil so as to control the telescopic movement of the jack 3. The locking valve 8 is arranged at the oil port position of the jack. The locking valve 8 is used to be locked after the jack reaches the target position.

[0037] The operation valve 7 can accurately control the flow direction of hydraulic oil, and further accurately control the telescopic movement of the jack 3. The operator can flexibly control the extension length and retraction speed of the jack according to actual needs, ensuring that the hydraulic single prop can accurately reach the required retracted position, improving the operation accuracy and precision. The locking valve 8 locks the jack 3 after it reaches the target position, effectively preventing the jack from accidentally moving due to external forces or minor fluctuations in the hydraulic system. This function ensures that the hydraulic single prop can maintain a stable position after retraction, avoiding potential safety accidents caused by the movement of the prop and providing safety guarantee for subsequent work.

[0038] Through the flexible control of the jack 3 by the operation valve 7 and the quick locking function of the locking valve 8, the operation time can be reduced and the work efficiency can be improved. The operator can quickly retract the hydraulic single prop to the designated position and lock it, without repeated adjustment and waiting, thus speeding up the entire work process and improving the work efficiency. The combined use of the operation valve 7 and the locking valve 8 helps to enhance the stability of the entire hydraulic system. The precise control of the operation valve 7 can make the pressure change in the hydraulic system more stable, reducing pressure shock. The locking function of the locking valve 8 avoids the shaking and displacement of the jack during operation, making the entire system more stable and reliable, reducing the incidence of system failures, and extending the service life of the equipment.

[0039] In some embodiments, anti-slip patterns or rubber pads are provided at the bottom of the fixed base 1.

[0040] The anti-slip patterns or rubber pads can increase the friction between the fixed base and the ground, making the device more stable during operation and not prone to sliding or displacement. This helps to ensure the stability of the device during the auxiliary retraction operation of the hydraulic single prop, improving the safety and accuracy of the operation.

[0041] Whether on a flat cement floor or a relatively rough ground, the anti-slip patterns or rubber pads can play a good anti-slip role, enhancing the adaptability of the device to different ground conditions and expanding the use range of the device. In addition, the design of the anti-slip patterns or rubber pads also takes into account wear resistance and corrosion resistance, ensuring that they can still maintain good performance under long-term use and various environmental conditions, further improving the reliability and durability of the device.

[0042] In some embodiments, the device further includes a hydraulic oil filtration assembly, which is arranged on the hydraulic pipeline in front of the oil inlet of the jack 3 and is used to filter the hydraulic oil entering the jack 3.

[0043] The setting of the hydraulic oil filtration assembly can effectively filter out impurities, particles and other pollutants in the hydraulic oil, prevent these impurities from entering the interior of the jack, reduce the wear of precision components such as pistons and cylinder barrels, and avoid scratches or damage to seals, thereby prolonging the service life of the jack and reducing the maintenance cost.

[0044] Ensure the cleanliness of the hydraulic oil, make the operation of the jack more stable and accurate, reduce system failures caused by impurity blockage of the oil circuit or influence on the performance of the hydraulic oil, improve the reliability and stability of the entire hydraulic system, and ensure the normal operation of the auxiliary retraction device.

[0045] Since the filtration assembly can intercept most impurities, it can reduce the degree of oil pollution in the hydraulic system, reduce the frequency of regular replacement of hydraulic oil and cleaning of the system, and thus reduce the workload and maintenance cost of maintenance personnel.

[0046] In some embodiments, a buffer pad is installed at the part of the telescopic platform 2 that contacts the hydraulic single prop.

[0047] In some embodiments, the device further includes a positioning fixture, which is arranged on the fixed base 1 and the telescopic platform 2 and is used to adjust and fix the prop according to the shape and size of the hydraulic single prop.

[0048] The positioning fixture can be adjusted according to the specific shape and size of the hydraulic single prop to ensure that the prop can be accurately placed at the predetermined position on the device, providing an accurate positioning reference for the subsequent retraction operation and ensuring the accuracy and consistency of the operation.

[0049] The positioning fixture can firmly fix the hydraulic single prop on the device, prevent the prop from shaking, shifting or tipping during the auxiliary retraction process, improve the safety of the operation, and also help to ensure the smoothness and effectiveness of the retraction action. Through the adjustable positioning fixture, the device can adapt to various hydraulic single props with different shapes and sizes, expand the application range of the device, improve the versatility and utilization rate of the equipment, and reduce the cost of equipping multiple special devices for different specifications of props.

[0050] In some embodiments, the device further includes a quick-connect joint for hydraulic pipelines, which is connected to the hydraulic pipeline of the jack 3 by plugging or rotating and is used to quickly complete the connection and disassembly of the hydraulic pipeline of the jack 3.

[0051] The plug-in or rotary connection method of the quick-connect fitting for hydraulic pipelines can achieve quick connection and disconnection, eliminating the need for cumbersome tightening or loosening operations with tools as in traditional connection methods. This significantly saves the time for installing and disassembling hydraulic pipelines, making equipment commissioning, maintenance, and component replacement more efficient.

[0052] This quick-connect fitting is simple and convenient to operate, reducing the labor intensity and operation difficulty of the operator. Even in narrow or inconvenient positions, the connection and disconnection of the pipeline can be easily completed, improving the convenience and flexibility of operation.

[0053] The quick-connect fitting for hydraulic pipelines usually has good sealing performance. After being connected in place, it can ensure the sealing of the hydraulic pipeline, effectively reducing the risk of hydraulic oil leakage. This can not only avoid environmental pollution and resource waste caused by oil leakage but also ensure the normal working pressure of the hydraulic system and improve the reliability of the system.

[0054] In some embodiments, the single-piece elevation device 6 is a hydraulic lifting column or a screw-type lifting mechanism.

[0055] Driven by a hydraulic system, the hydraulic lifting column can quickly achieve lifting and lowering actions, and can adjust the fixed base to a suitable height in a short time, improving work efficiency. For example, in occasions where the height needs to be frequently adjusted, the hydraulic lifting column can respond quickly and reduce waiting time.

[0056] The hydraulic system can provide a large driving force. Therefore, the hydraulic lifting column can carry heavy hydraulic single props and related equipment, ensuring stable height adjustment under different load conditions and meeting various work requirements. With the help of a hydraulic control system, the lifting and lowering height of the lifting column can be precisely controlled, thereby achieving precise adjustment of the height of the fixed base. This helps to adapt to different specifications of hydraulic single props and ensure the accuracy and consistency of operations in some work scenarios with strict height requirements.

[0057] In some embodiments, a liquid supply handle is further provided on the operation valve 7, and the liquid supply handle is connected to the operation valve 7 through a lever.

[0058] In some embodiments, a labor-saving auxiliary mechanism is further provided on the liquid supply handle, and the labor-saving auxiliary mechanism is a gear transmission mechanism.

[0059] Through the transmission ratio design, the gear transmission mechanism can convert the small input force applied by the operator on the liquid supply handle into a larger output torque, thereby significantly reducing the physical effort required to open or close the operation valve 7. For example, when frequent adjustment of the hydraulic oil flow rate or long-term continuous operation is required, the labor-saving characteristic of the gear transmission can effectively reduce the fatigue of the operator and improve the operation comfort. The meshing characteristic of the gear transmission makes the handle movement and the response of the operation valve more linear and controllable. The operator can finely adjust the position of the handle to achieve fine adjustment of the hydraulic oil flow rate, avoiding sudden changes in the valve opening due to excessive operating force, thereby ensuring the stability of the hydraulic system pressure and improving the control accuracy of the auxiliary retraction process.

[0060] The gear transmission mechanism has self-locking property (such as when using worm and worm gear design), and can automatically maintain the valve opening after the handle stops moving, preventing accidental displacement of the valve due to pressure fluctuations or external vibrations in the hydraulic system. This stability can avoid the risk of rebound or jamming of the hydraulic single prop during the retraction process due to unstable pressure. In addition, the self-locking function can quickly lock the valve in case of emergency to ensure system safety. The design of the gear transmission mechanism not only improves the operation convenience, but also extends the service life of the equipment and reduces the maintenance cost.

[0061] The fixed base 1 provides a stable support foundation for the entire device and fixes the device in a suitable position. During use, according to the length of the hydraulic single prop, the internal length of the device is adjusted through the limit plate 4 on the telescopic platform 2 to make the device adapt to hydraulic single props of different lengths, complete the positioning of the hydraulic single prop, and ensure that it is in the correct working position. The single prop elevation device 6 supports and stabilizes the telescopic platform 2 by adjusting its own height according to the actual working scenario and ground conditions, making the hydraulic single prop in a horizontal or appropriate angle, and providing a stable support environment for the subsequent retraction operation.

[0062] The jack 3 adopts a remote liquid supply method. When it is necessary to retract the hydraulic single prop, the jack 3 is supplied with liquid through remote control. The hydraulic oil enters the hydraulic cylinder of the jack 3 and pushes the piston rod to extend or retract. Since the jack 3 is connected to the telescopic platform 2, the telescopic movement of the piston rod drives the telescopic platform 2 to move, thereby applying a force to the hydraulic single prop and making it gradually retract. A anti-collapse limiting rod 5 is provided on the piston rod of the jack 3 and moves along with the telescopic movement of the piston rod. When the piston rod is subjected to abnormal pressure or impact, the anti-collapse limiting rod 5 can limit the stroke of the piston rod to prevent it from accidentally popping out, playing a safety protection role and avoiding personal injury or equipment damage caused by the piston rod popping out.

[0063] As can be seen from the above embodiments, the present application provides a hydraulic single prop auxiliary retraction device, including a fixed base, a telescopic platform, and a jack; the fixed base is used to support the device; the telescopic platform is arranged on the fixed base, and the jack is connected to the telescopic platform; one end of the telescopic platform is provided with a limit plate for adjusting the internal length of the device to adapt to hydraulic single props of different lengths; the jack is operated by a remote liquid supply method, and an anti-collapse limiting rod is provided on the upper part of the jack; the anti-collapse limiting rod is arranged on the piston rod of the jack and moves along with the expansion and contraction of the piston rod; a single prop heightening device is further arranged between the fixed base and the telescopic platform, and the single prop heightening device supports and stabilizes the telescopic platform by adjusting the height; one end of the single prop heightening device is connected to the fixed base, and the other end is connected to the telescopic platform. In the present application, a limit plate is provided at one end of the telescopic platform. By adjusting the position of the limit plate, the internal length of the device can be flexibly changed, enabling the device to adapt to the retraction work of hydraulic single props of different lengths, meeting the retraction requirements of single props of various specifications in coal mine underground, expanding the application range of the device, and improving the versatility of the equipment. The anti-collapse limiting rod provided on the upper part of the jack of the device is installed on the piston rod and moves along with it. When the piston rod suddenly extends or malfunctions, it can limit the movement range of the piston rod, preventing damage to personnel and equipment caused by the ejection of jack components, and greatly improving the safety factor of on-site operations.

[0064] For the similar parts between the embodiments provided in the present application, reference can be made to each other. The specific embodiments provided above are only several examples under the general concept of the present application and do not constitute a limitation on the protection scope of the present application. For those skilled in the art, any other embodiments extended based on the solution of the present application without creative efforts belong to the protection scope of the present application.

Claims

1. A hydraulic single-body support auxiliary retraction device, characterized in that: include: It comprises a fixed base (1), a telescopic platform (2), and a jack (3); the fixed base (1) is used to support the device; The telescopic platform (2) is arranged on a fixed base (1), and the jack (3) is connected to the telescopic platform (2); a limit plate (4) is arranged at one end of the telescopic platform (2), and the limit plate (4) is fixed to the telescopic platform (2) in a sliding or detachable manner so as to adjust the internal length of the device; the jack (3) is operated by a remote liquid supply method, and a collapse prevention limit rod (5) is arranged on the top of the jack (3); the collapse prevention limit rod (5) is arranged on the piston rod of the jack (3) and moves as the piston rod is extended or retracted; A single-body raising device (6) is also provided between the fixed base (1) and the telescopic platform (2), and the single-body raising device (6) supports and stabilizes the telescopic platform (2) by adjusting its height; one end of the single-body raising device (6) is connected to the fixed base (1), and the other end is connected to the telescopic platform (2).

2. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: One end of the jack (3) is also connected to an operating valve (7) and a locking valve (8); the operating valve (7) is arranged at the hydraulic pipeline interface of the jack, and the operating valve (7) is used to control the flow direction of the hydraulic oil to control the extension and retraction action of the jack (3); the locking valve (8) is arranged at the oil port position of the jack, and the locking valve (8) is used to be locked after the jack reaches the target position.

3. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: The bottom of the fixed base (1) is provided with anti-skid patterns or rubber pads.

4. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: The device also comprises a hydraulic oil filter assembly, which is arranged on the hydraulic pipeline in front of the oil inlet of the jack (3) and is used to filter the hydraulic oil entering the jack (3).

5. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: The telescopic platform (2) is provided with a buffer pad at a position in contact with the hydraulic single support column.

6. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: The device also comprises a positioning fixture, which is arranged on the fixed base (1) and the telescopic platform (2) and is used to adjust and fix the hydraulic single-body support according to the shape and size of the support.

7. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: The device also comprises a hydraulic pipeline quick connection joint, which is connected to the hydraulic pipeline of the jack (3) in a plug-in or rotational manner and is used to quickly complete the connection and removal of the hydraulic pipeline of the jack (3).

8. The hydraulic single-body support auxiliary retraction device according to claim 1, characterized in that: The single body raising device (6) is a hydraulic lifting column or a spiral lifting mechanism.

9. The hydraulic single-body support auxiliary retraction device according to claim 2, characterized in that: The operating valve (7) is also provided with a liquid supply handle, and the liquid supply handle is connected to the operating valve (7) via a lever.

10. The hydraulic single-body support auxiliary retraction device according to claim 9, characterized in that: The liquid supply handle is also provided with a labor-saving auxiliary mechanism, and the labor-saving auxiliary mechanism is a gear transmission mechanism.

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