A compact size built-in sensor hydraulic support electro-hydraulic control pushing jack

Abstract

This utility model discloses a compact, built-in sensor hydraulic support electro-hydraulic push jack, relating to the field of push jacks. It includes a positioning component, a limit plug, a cylinder bottom, a cylinder barrel, a piston, a piston rod, a guide sleeve, and a displacement sensor. The cylinder bottom is fixedly assembled at the bottom opening of the cylinder barrel, and a sensor socket is welded to the outer surface of the cylinder barrel. This utility model achieves built-in installation of the displacement sensor by designing a dedicated cavity structure inside the cylinder bottom and precisely assembling the limit plug and positioning component. While retaining the cylinder bottom pin hole structure to meet specific hydraulic support assembly requirements, it also achieves cable avoidance and positioning fixation through slots and through holes. All components are arranged orderly inside the cylinder bottom, eliminating the need for additional expansion of the overall jack size, significantly improving structural compactness and meeting the size limitations of hydraulic supports for push jacks.

Description

Technical Field

[0001] This utility model belongs to the field of push-pull jacks, specifically relating to a compact-sized electro-hydraulic push-pull jack with a built-in sensor hydraulic support. Background Technology

[0002] In fields such as coal mining, hydraulic supports are key equipment to ensure mining safety and efficiency. As the core actuator of hydraulic supports, the real-time monitoring of the displacement accuracy of the push jack is crucial for the control of the support posture and the stability of the roof support. Therefore, electro-hydraulic push jacks often need to be equipped with magnetostrictive displacement sensors to achieve displacement data acquisition.

[0003] Currently, electro-hydraulic push jacks equipped with magnetostrictive displacement sensors mostly adopt a round bottom or trunnion structure for their cylinder bottom. Although such structures can meet the sensor installation requirements, in some specific hydraulic support application scenarios, push jacks must be designed with a pin hole structure due to the overall layout and assembly requirements of the support.

[0004] However, the internal space of the cylinder bottom in the traditional pin hole structure is limited, while the installation of displacement sensors requires space to be reserved for the sensor body, cable lead-out, and assembly of fixing components. The existing structure is difficult to ensure the function of the pin hole while compactly arranging the displacement sensor-related components, resulting in the displacement sensor being unable to be installed, or the overall size of the jack exceeding the support design limit due to forced installation, affecting the overall compactness of the hydraulic support and its adaptability to downhole operations.

[0005] Therefore, we propose a compact, built-in sensor-equipped, electro-hydraulic push jack to solve the above problems. Utility Model Content

[0006] In view of the limited internal space of the cylinder bottom in the traditional pin hole structure, the existing structure is difficult to compactly arrange displacement sensor components while ensuring the function of the pin hole, resulting in the displacement sensor being unable to be installed. This utility model provides a compact-sized electro-hydraulic push jack with a built-in sensor hydraulic support.

[0007] The solution adopted by this utility model to solve its technical problem is: a compact-sized built-in sensor hydraulic support electro-hydraulic push jack, including a positioning component, a limit plug, a cylinder bottom, a cylinder barrel, a piston, a piston rod, a guide sleeve and a displacement sensor. The cylinder bottom is fixedly assembled at the bottom opening of the cylinder barrel, and a sensor socket is welded and fixed on the outer surface of the cylinder barrel. The piston is fixedly sleeved on the bottom end of the piston rod, and the outer wall of the piston is in a sealing sliding fit with the inner wall of the cylinder. The upper end of the piston rod passes through the guide sleeve and extends out of the cylinder, and a magnetic ring is fixedly fitted on its lower end. The guide sleeve is fixedly fitted at the top opening of the cylinder. The cylinder bottom has a cavity structure machined inside for installing displacement sensors and limit plugs. The cylinder bottom is drilled with a wire hole and a mounting hole for installing positioning components. The wire hole and the mounting hole are respectively connected to the cavity structure. The displacement sensor is installed in a pre-set mounting channel inside the piston rod, with its lower end located inside the cavity structure. The limiting plug is installed inside the cavity structure and located at the lower end of the displacement sensor. The limiting plug has a through hole for the positioning component to pass through, and a slot is opened at the end near the displacement sensor. The cable of the displacement sensor is led out through the slot and the through hole of the limiting plug and then connected to the sensor socket. The positioning element is installed in the mounting hole and through hole to fix the position of the limit plug.

[0008] Preferably, a push lock is welded and fixed to the outer surface of the cylinder, and the push lock is provided with a rodless chamber inlet and a rod chamber inlet.

[0009] Preferably, the diameter of both the threading hole and the mounting hole is Φ12mm.

[0010] Preferably, the positioning element is a positioning pin, and threaded plugs are provided at both ends of the positioning pin, and the two threaded plugs are respectively threadedly connected to both ends of the mounting hole.

[0011] Preferably, the cylinder bottom is provided with a pin hole structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by designing a special cavity structure inside the cylinder bottom and cooperating with the precise assembly of the limiting plug and positioning component, achieves the built-in installation of the displacement sensor while retaining the cylinder bottom pin hole structure to meet the specific hydraulic support assembly requirements. Furthermore, the limiting plug achieves cable avoidance and positioning fixation through the slot and through hole respectively. All components are arranged in an orderly manner inside the cylinder bottom, without the need to additionally expand the overall size of the jack, significantly improving the structural compactness and meeting the size restriction requirements of the hydraulic support for the pushing jack.

[0013] 2. This utility model uses a positioning pin and a threaded plug to fix the limiting plug, ensuring the stability of the displacement sensor's position inside the cylinder bottom, preventing sensor displacement due to vibration or hydraulic shock, and improving measurement accuracy and service life.

[0014] 3. The cable of the displacement sensor of this utility model is led out through the slot of the limiting plug and the wire hole at the bottom of the cylinder and connected to the sensor socket interface. The cable is neatly routed and protected, which reduces the risk of wear and tear and ensures the stability and accuracy of displacement data acquisition. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the limiting plug and positioning pin of this utility model; Figure 4 This is a partial top view cross-sectional structural diagram of the cylinder block of this utility model.

[0016] In the diagram: 1. Cylinder bottom; 2. Piston; 3. Piston rod; 4. Guide sleeve; 5. Threaded plug; 6. Locating pin; 7. Limit plug; 8. Displacement sensor; 9. Magnetic ring; 10. Sensor socket interface; 11. Rod chamber inlet; 12. Rodless chamber inlet; 13. Cable; 14. Cylinder barrel; 15. Push lock. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please see Figure 1-4 This utility model provides a technical solution for a compact, built-in sensor hydraulic support electro-hydraulic push jack: Example 1: according to Figure 1-4 As shown, it includes a positioning component, a limit plug 7, a cylinder bottom 1, a cylinder barrel 14, a piston 2, a piston rod 3, a guide sleeve 4, and a displacement sensor 8. The cylinder bottom 1 is fixedly assembled at the bottom opening of the cylinder barrel 14. A sensor socket is welded and fixed on the outer surface of the cylinder barrel 14. A push lock 15 is welded and fixed on the outer surface of the cylinder barrel 14. The push lock 15 is provided with a rodless chamber inlet 12 and a rod chamber inlet 11.

[0019] The piston 2 is fixedly sleeved on the bottom end of the piston rod 3, and the outer wall of the piston 2 is in a sealing sliding fit with the inner wall of the cylinder 14. The upper end of the piston rod 3 passes through the guide sleeve 4 and extends out of the cylinder 14, and a magnetic ring 9 is fixedly installed on its lower end. The guide sleeve 4 is fixedly installed at the top opening of the cylinder 14.

[0020] The cylinder bottom 1 is provided with a pin hole structure. The cylinder bottom 1 has a cavity structure machined inside for installing the displacement sensor 8 and the limit plug 7. By designing a special cavity structure inside the cylinder bottom 1 and cooperating with the precise assembly of the limit plug 7 and the positioning component, the displacement sensor 8 can be installed inside the cylinder bottom 1 while retaining the pin hole structure to meet the specific hydraulic support assembly requirements. The cylinder bottom 1 is drilled with a wire hole and a mounting hole for installing the positioning component. The wire hole and the mounting hole are respectively connected to the cavity structure. The diameter of the wire hole and the mounting hole is Φ12mm.

[0021] The displacement sensor 8 is installed in a pre-set channel inside the piston rod 3, with its lower end located inside the cavity structure. The limiting plug 7 is installed inside the cavity structure and located at the lower end of the displacement sensor 8.

[0022] The limit plug 7 has a through hole for the positioning component to pass through, and a slot is opened at the end near the displacement sensor 8. The limit plug 7 achieves cable avoidance and positioning fixation through the slot and the through hole respectively. All components are arranged in an orderly manner inside the cylinder bottom 1, without the need to expand the overall size of the jack, which significantly improves the structural compactness and meets the size restriction requirements of the hydraulic support for the pushing jack.

[0023] The cable 13 of the displacement sensor 8 is led out through the slot and wire hole of the limiting plug 7 and connected to the sensor socket. The cable is neatly routed and protected, which reduces the risk of wear and tear and ensures the stability and accuracy of displacement data acquisition.

[0024] The positioning component is a positioning pin 6, which is installed in the mounting hole and through hole to fix the position of the limit plug 7. Threaded plugs 5 are provided at both ends of the positioning pin 6, and the two threaded plugs 5 are threadedly connected to the two ends of the mounting hole. By using the positioning pin 6 and the threaded plugs 5 to fix the limit plug 7, the position of the displacement sensor 8 in the cylinder bottom 1 is kept stable, preventing the sensor from shifting due to vibration or hydraulic shock, thus improving the accuracy of measurement and service life.

[0025] In practical use, the compact-sized built-in sensor hydraulic support electro-hydraulic push jack of this utility model first fixes the magnetic ring 9 to the bottom end of the piston rod 3, and then assembles and seals the piston rod 3, piston 2, guide sleeve 4, cylinder 14 and cylinder bottom 1 in sequence. The displacement sensor 8 is passed through the cavity structure machined on the cylinder bottom 1 from its lower end and inserted into the preset installation channel inside the piston rod 3. Then the cable 13 of the displacement sensor 8 is passed through the wire hole of the cylinder bottom 1 and led to the outside of the cylinder barrel 14 and connected to the sensor socket interface 10. Place the limit plug 7 inside the cavity structure of the cylinder bottom 1 and position it below the displacement sensor 8. At the same time, the cable 13 of the displacement sensor 8 is located in the slot of the limit plug 7. Pass the positioning pin 6 through the mounting hole and the through hole, and then screw the threaded plug 5 into both ends of the positioning pin 6 and tighten them to firmly fix the limit plug 7 in the cavity of the cylinder bottom 1. Use four hex bolts to secure the push lock 15 to the cylinder 14 to complete the final assembly.

Claims

1. A compact-sized electro-hydraulic push jack with a built-in sensor hydraulic support, comprising a positioning component, a limit plug, a cylinder bottom, a cylinder barrel, a piston, a piston rod, a guide sleeve, and a displacement sensor, wherein the cylinder bottom is fixedly assembled at the bottom opening of the cylinder barrel, and a sensor socket is welded and fixed to the outer surface of the cylinder barrel; The piston is fixedly sleeved on the bottom end of the piston rod, and the outer wall of the piston is in a sealing sliding fit with the inner wall of the cylinder. The upper end of the piston rod passes through the guide sleeve and extends out of the cylinder, and a magnetic ring is fixedly fitted on its lower end. The guide sleeve is fixedly fitted at the top opening of the cylinder. The characteristic feature is that: The cylinder bottom has a cavity structure machined inside for installing displacement sensors and limit plugs. The cylinder bottom is drilled with a wire hole and a mounting hole for installing positioning components. The wire hole and the mounting hole are respectively connected to the cavity structure. The displacement sensor is installed in a pre-set mounting channel inside the piston rod, with its lower end located inside the cavity structure. The limiting plug is installed inside the cavity structure and located at the lower end of the displacement sensor. The limiting plug has a through hole for the positioning component to pass through, and a slot is opened at the end near the displacement sensor. The cable of the displacement sensor is led out through the slot and the through hole of the limiting plug and then connected to the sensor socket. The positioning element is installed in the mounting hole and through hole to fix the position of the limit plug.

2. The compact-sized, built-in sensor hydraulic support electro-hydraulic push jack according to claim 1, characterized in that: A push lock is welded and fixed to the outer surface of the cylinder, and the push lock is provided with a rodless chamber inlet and a rod chamber inlet.

3. The compact-sized, built-in sensor hydraulic support electro-hydraulic push jack according to claim 1, characterized in that: The diameter of both the threading hole and the mounting hole is Φ12mm.

4. The compact-sized, built-in sensor hydraulic support electro-hydraulic push jack according to claim 1, characterized in that: The positioning element is a positioning pin, and threaded plugs are provided at both ends of the positioning pin. The two threaded plugs are respectively threadedly connected to both ends of the mounting hole.

5. The compact-sized, built-in sensor hydraulic support electro-hydraulic push jack according to claim 1, characterized in that: The cylinder bottom is provided with a pin hole structure.

Images