Pull-type sensor snapping protection device

Abstract

The invention discloses a pull-type sensor snapping protection device, and belongs to the technical field of force standard machines, the pull-type sensor snapping protection device comprises a force standard machine rack, a reaction frame is connected in the force standard machine rack, the force standard machine rack comprises a rack base and a movable cross beam, a fixed cross beam is arranged between the rack base and the movable cross beam, and the fixed cross beam is connected with the reaction frame. The top of the movable cross beam is connected with a sensor buffer base plate, the center of the top of the sensor buffer base plate is provided with a standard sensor, and the outer side of the standard sensor is provided with a plurality of groups of buffer cylinders. According to the invention, the adjustment is more accurate, when the pull-type sensor is snapped, the standard sensor can be protected and prevented from being damaged, and when the pull-type sensor is fractured, the impact on the standard sensor caused by fracture can be relieved, so that the standard sensor is safer.

Description

Technical Field

[0001] The present application relates to the technical field of force standard machines, and more specifically, to a protection device for preventing a pull-type sensor from being pulled apart. Background Art

[0002] A force standard machine is a standard instrument used to measure the degree of force applied to an object. It is mainly used for quality inspection and scientific research in enterprises. It can be used to test the strength and material properties of machine parts, as well as to study the strength, toughness, wear resistance, adhesion and other properties of materials.

[0003] Pull-type sensors are widely used in industrial automation control systems to measure and monitor various physical quantities. However, in actual use, due to improper operation or external force factors, pull-type sensors are prone to breakage, resulting in sensor damage and even affecting the normal operation of the entire automation system. At present, there are some sensor protection devices on the market, but most of them focus on environmental protection such as waterproofing and dustproofing of sensors, and there are relatively few solutions for break protection; Therefore, in order to solve the above problems, a protection device for preventing a pull-type sensor from being pulled apart is proposed. Summary of the invention

[0004] In order to improve the above-mentioned problem, the present application provides a protection device for preventing a pull-type sensor from being pulled apart.

[0005] The present application provides a protection device for a pull-type sensor to be pulled off, which adopts the following technical solution: A protection device for a pull-type sensor being pulled off, comprising a force standard machine frame, a reaction frame connected inside the force standard machine frame, the force standard machine frame comprising a frame base and a movable crossbeam, a fixed crossbeam arranged between the frame base and the movable crossbeam, a sensor buffer pad connected to the top of the movable crossbeam, a standard sensor arranged at the top center of the sensor buffer pad, and a plurality of buffer cylinders arranged outside the standard sensor; Among them, the reaction frame includes an upper beam and a lower beam of the reaction frame, a detection connecting plate is arranged between the upper beam and the lower beam of the reaction frame, and a pulling sensor is connected between the detection connecting plate and the fixed beam, both ends of the pulling sensor are connected with connecting pull heads, and two groups of connecting pull heads are respectively connected to the fixed beam and the detection connecting plate; the force standard machine frame is located on the detection work platform, and the reaction frame is connected to the pulling device through the connecting pull plate, and during the detection process, the force value of the pulling sensor is calibrated by the standard sensor, and the strength and toughness of the material are detected by the pulling sensor, and when the pulling sensor breaks, the standard sensor is protected by the sensor buffer plate and the buffer cylinder.

[0006] Preferably, a supporting column is arranged between the frame base and the fixed beam, a telescopic column is arranged between the fixed beam and the movable beam, a lifting and lowering adjustment motor and two sets of transmission screws are arranged on one side of the fixed beam, and the two sets of transmission screws are respectively arranged on both sides of the lifting and lowering adjustment motor.

[0007] By adopting the above technical solution, the force standard machine frame is located on the detection platform through the frame base, and the distance between the fixed beam and the movable beam can be adjusted according to the detection range, and the movable beam can be telescopically raised and lowered by the telescopic column driven by the lifting and lowering adjustment motor, thereby completing the adjustment of the distance between the fixed beam and the movable beam.

[0008] Preferably, the telescopic column comprises a screw transmission block, a lifting screw and a lifting column, the screw transmission block is connected to the fixed beam, and the lifting screw is connected between the lifting column and the screw transmission block.

[0009] By adopting the above technical solution, the lifting screw drives the lifting column to move up and down, and the lifting column drives the movable crossbeam to move.

[0010] Preferably, a synchronous belt is connected between the output shaft of the lifting and lowering adjustment motor and one end of the two sets of transmission screws, and the transmission screw and the lifting screw are meshed with each other in the screw transmission block.

[0011] By adopting the above technical solution, the lifting and lowering adjustment motor drives the transmission screw to rotate through the synchronous belt, and the transmission screw drives the lifting and lowering screw to rotate in the screw transmission block during the rotation process.

[0012] Preferably, multiple groups of supporting columns are connected between the upper crossbeam of the reaction frame, the lower crossbeam of the reaction frame and the detection connecting plate, and the multiple groups of supporting columns are plugged into the movable crossbeam and the fixed crossbeam, the lower crossbeam of the reaction frame is connected to the top of the frame base, and the top of the upper crossbeam of the reaction frame is connected with a connecting pull plate.

[0013] By adopting the above technical solution, the upper crossbeam of the reaction frame is connected to the tension component through the connecting pull plate, the reaction frame is connected to the frame base through the lower crossbeam of the reaction frame, and is connected to the force standard machine frame through multiple groups of supporting columns.

[0014] Preferably, a sensor connecting pad is connected between the sensor buffer pad and the movable cross beam, an overflow valve is connected between the buffer cylinder and the sensor buffer pad, an overflow valve core is arranged in the overflow valve, and an oil return channel is arranged on one side of the overflow valve core.

[0015] By adopting the above technical solution, the sensor buffer pad is connected to the movable crossbeam through the sensor connecting pad. When the pull-type sensor breaks, because the entire reaction frame is in point contact, the entire reaction frame instantly releases energy upward and then falls down. At this time, the overflow valve is opened by the breaking force, and at the same time, the load of the buffer cylinder is relied on to prevent the weight of the reaction frame from pressing on the standard sensor when it falls.

[0016] Preferably, a telescopic support rod is slidably connected in the buffer cylinder, and a buffer oil tank is arranged away from the buffer cylinder, a sealing gasket is arranged at the connection between the telescopic support rod and the buffer oil tank, and one end of the telescopic support rod is connected to the connecting pull plate.

[0017] By adopting the above technical solution, the buffer cylinder is supported by the telescopic support rod, and the telescopic action of the telescopic support rod is buffered by the buffer oil tank during the telescopic process of the telescopic support rod.

[0018] Preferably, an oil cylinder piston is provided on the outer side of the telescopic support rod, and a buffer push block is connected to the side of the oil cylinder piston close to the buffer oil tank, an overflow valve rod is connected to the side of the oil cylinder piston away from the buffer push block, and a connecting oil pipe is connected between the overflow valve rod and the buffer oil tank.

[0019] By adopting the above technical solution, the telescopic support rod separates the buffer cylinder into two upper and lower chambers through the cylinder piston, and under normal conditions, the hydraulic oil in the buffer cylinder is located in the upper chamber of the buffer cylinder.

[0020] Preferably, a buffer oil tank is provided in the buffer oil tank, and one side of the buffer oil tank is connected to an oil inlet channel, and the overflow valve core and the overflow valve stem are engaged with each other, and the buffer oil tank and the buffer push block are engaged with each other.

[0021] By adopting the above technical scheme, when the buffer cylinder is in normal state, the overflow valve stem and the overflow valve core are interlocked, and the overflow valve is opened and closed by the overflow valve stem. When the pull-off situation occurs, the telescopic support rod has the pulling force to drive it to move upward, and the telescopic support rod drives the oil cylinder piston to move upward during the movement, and drives the hydraulic oil in the upper cabin of the buffer cylinder to move into the buffer oil tank during the movement. The hydraulic oil first enters the buffer oil tank through the oil inlet channel and the opening of the buffer oil tank, and the hydraulic oil in the buffer oil tank enters the overflow valve core through the connecting oil pipe. When the buffer push block enters When in the buffer oil tank, the buffer push block reduces the gap of the opening of the buffer oil tank to reduce the moving speed of the hydraulic oil, thereby completing the slowing down of the moving speed of the overflow valve stem, thereby reducing the impact generated during the pulling process, and at this time, the hydraulic oil enters the buffer oil tank through the gap of the opening of the buffer oil tank and the oil inlet channel, and when the hydraulic oil is transferred to the overflow valve core, the hydraulic oil in the overflow valve core flows back to the lower compartment in the buffer cylinder through the return oil channel and the opening of the overflow valve core, and when the overflow valve stem moves in the opposite direction, the return work can also be slowed down by the overflow valve core and the overflow valve stem.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: Compared with the prior art, the protection device for the pull-type sensor to be pulled apart can adjust the frame of the force standard machine according to the measured range, and through mechanical adjustment, the adjustment is more precise. The lifting and lowering adjustment motor drives the transmission screw to rotate through the synchronous belt, and the transmission screw drives the lifting and lowering screw to rotate in the screw transmission block during the rotation process, and the lifting and lowering screw drives the lifting column to lift and move, thereby driving the movable beam to move through the lifting column.

[0023] Compared with the prior art, the protective device for the pulling sensor being pulled apart can protect the standard sensor when the pulling sensor is pulled apart to prevent the standard sensor from being damaged, and when the pulling sensor is broken, the standard sensor is protected by the sensor buffer plate and the buffer cylinder, and the sensor buffer plate is connected to the movable crossbeam through the sensor connecting plate. When the pulling sensor is broken, because the entire reaction frame is point contact, the entire reaction frame instantly releases energy upwards and then falls down. At this time, the overflow valve is opened by the breaking force, and at the same time, the load of the buffer cylinder is relied on to prevent the weight of the reaction frame from pressing on the standard sensor when it falls.

[0024] Compared with the prior art, this kind of protection device for the pull-type sensor to be pulled apart can reduce the impact on the standard sensor caused by the breakage when it breaks, making the standard sensor safer. When the pull-off situation occurs, the telescopic support rod has the breaking force to drive it to move upward, and the telescopic support rod drives the oil cylinder piston to move upward during the movement, and drives the hydraulic oil in the upper cabin of the buffer cylinder to move into the buffer oil tank during the movement. The hydraulic oil first enters the buffer oil tank through the oil inlet channel and the opening of the buffer oil tank, and the hydraulic oil in the buffer oil tank enters the overflow valve core through the connecting oil pipe, and when the buffer When the push block enters the buffer oil tank, the buffer push block reduces the gap of the opening of the buffer oil tank to reduce the moving speed of the hydraulic oil, thereby completing the slowing down of the moving speed of the overflow valve stem, thereby reducing the impact generated during the breaking process, and at this time, the hydraulic oil enters the buffer oil tank through the gap of the opening of the buffer oil tank and the oil inlet channel, and when the hydraulic oil is transferred to the overflow valve core, the hydraulic oil in the overflow valve core flows back to the lower compartment in the buffer cylinder through the return oil channel and the opening of the overflow valve core, and when the overflow valve stem moves in the opposite direction, the return stroke can also be slowed down through the overflow valve core and the overflow valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the overall front structure of the present application; Figure 3 It is a schematic diagram of the overall front cross-section structure of the present application; Figure 4 This is a schematic diagram of the structure of the force standard frame of this application; Figure 5 This is a schematic diagram of the structure of the reaction frame of this application; Figure 6 This is a schematic diagram of the structure of the sensor buffer pad of the present application; Figure 7 This is a schematic diagram of the structure of the buffer cylinder of the present application.

[0026] The accompanying drawings are marked as follows: 1. Force standard machine frame; 11. Frame base; 12. Fixed beam; 13. Movable beam; 14. Support column; 15. Telescopic column; 151. Lifting screw rod; 152. Lifting column; 153. Screw transmission block; 16. Lifting adjustment motor; 161. Transmission screw rod; 162. Synchronous belt; 2. Reaction frame; 21. Reaction frame upper beam; 22. Reaction frame lower beam; 23. Detection connecting plate; 24. Support column; 3. Connecting pull plate; 4 , standard sensor; 5, pull sensor; 51, connecting pull head; 6, sensor buffer plate; 61, sensor connecting plate; 62, overflow valve; 621, overflow valve core; 622, return oil channel; 623, connecting oil pipe; 63, buffer cylinder; 631, telescopic support rod; 632, buffer oil tank; 6321, buffer oil chamber; 6322, oil inlet channel; 633, sealing gasket; 634, cylinder piston; 635, buffer push block; 636, overflow valve stem. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The following is combined with Figure 1 -Attached Figure 7 , further details of this application are given.

[0029] A protection device for pulling a pull sensor apart, referring to Figures 1 to 6 , including a force standard machine frame 1, a reaction frame 2 is connected inside the force standard machine frame 1, the force standard machine frame 1 includes a frame base 11 and a movable crossbeam 13, and a fixed crossbeam 12 is arranged between the frame base 11 and the movable crossbeam 13, a sensor buffer pad 6 is connected to the top of the movable crossbeam 13, a standard sensor 4 is arranged at the top center of the sensor buffer pad 6, and a plurality of buffer cylinders 63 are arranged outside the standard sensor 4; Among them, the reaction frame 2 includes an upper crossbeam 21 and a lower crossbeam 22 of the reaction frame, a detection connecting plate 23 is arranged between the upper crossbeam 21 and the lower crossbeam 22 of the reaction frame, and a pulling sensor 5 is connected between the detection connecting plate 23 and the fixed crossbeam 12, both ends of the pulling sensor 5 are connected with connecting pull heads 51, and two groups of connecting pull heads 51 are respectively connected to the fixed crossbeam 12 and the detection connecting plate 23; the force standard machine frame 1 is located on the detection work platform, and the reaction frame 2 is connected to the pulling device through the connecting pull plate 3, and during the detection process, the force value of the pulling sensor 5 is calibrated by the standard sensor 4, and the strength and toughness of the material are detected by the pulling sensor 5, and when the pulling sensor 5 breaks, the sensor buffer plate 6 and the buffer cylinder 63 protect the standard sensor 4.

[0030] Reference Figure 3 and Figure 4 A supporting column 14 is arranged between the frame base 11 and the fixed beam 12, a telescopic column 15 is arranged between the fixed beam 12 and the movable beam 13, a lifting and adjusting motor 16 and two sets of transmission screws 161 are arranged on one side of the fixed beam 12, and the two sets of transmission screws 161 are respectively arranged on both sides of the lifting and adjusting motor 16; the force standard machine frame 1 is located on the detection platform through the frame base 11, and the distance between the fixed beam 12 and the movable beam 13 can be adjusted according to the detection range, and the movable beam 13 can be telescopically lifted and retracted by the telescopic column 15 driven by the lifting and adjusting motor 16, thereby completing the adjustment of the distance between the fixed beam 12 and the movable beam 13.

[0031] Reference Figure 3 and Figure 4 The telescopic column 15 includes a screw transmission block 153, a lifting screw 151 and a lifting column 152. The screw transmission block 153 is connected to the fixed beam 12, and the lifting screw 151 is connected between the lifting column 152 and the screw transmission block 153; the lifting screw 151 drives the lifting column 152 to move up and down, and the lifting column 152 drives the movable beam 13 to move.

[0032] Reference Figure 1 A synchronous belt 162 is connected between the output shaft of the lifting and adjusting motor 16 and one end of the two sets of transmission screws 161, and the transmission screws 161 and the lifting and lowering screws 151 are meshed with each other in the screw transmission block 153; the lifting and lowering adjusting motor 16 drives the transmission screw 161 to rotate through the synchronous belt 162, and the transmission screw 161 drives the lifting and lowering screw 151 to rotate in the screw transmission block 153 during the rotation process.

[0033] Reference Figure 1 and Figure 5A plurality of groups of supporting columns 24 are connected between the upper crossbeam 21 of the reaction frame, the lower crossbeam 22 of the reaction frame and the detection connecting plate 23, and the plurality of groups of supporting columns 24 are plugged into and connected to the movable crossbeam 13 and the fixed crossbeam 12, the lower crossbeam 22 of the reaction frame is connected to the top of the frame base 11, and a connecting pull plate 3 is connected to the top of the upper crossbeam 21 of the reaction frame; the upper crossbeam 21 of the reaction frame is connected to the tension assembly through the connecting pull plate 3, the reaction frame 2 is connected to the frame base 11 through the lower crossbeam 22 of the reaction frame, and is connected to the force standard machine frame 1 through a plurality of groups of supporting columns 24.

[0034] Reference Figure 7 A sensor connecting pad 61 is connected between the sensor buffer pad 6 and the movable crossbeam 13, an overflow valve 62 is connected between the buffer cylinder 63 and the sensor buffer pad 6, an overflow valve core 621 is arranged in the overflow valve 62, and an oil return channel 622 is arranged on one side of the overflow valve core 621; the sensor buffer pad 6 is connected to the movable crossbeam 13 through the sensor connecting pad 61, and when the pull-type sensor 5 breaks, because the entire reaction frame 2 is in point contact, the entire reaction frame 2 instantly releases energy upwards and then falls down. At this time, the overflow valve 62 is opened by the breaking force, and at the same time, the load of the buffer cylinder 63 is relied on to prevent the weight of the reaction frame 2 from pressing on the standard sensor 4 when it falls.

[0035] Reference Figure 7 A telescopic support rod 631 is slidably connected in the buffer cylinder 63, and a buffer oil tank 632 is provided on the side of the buffer cylinder 63 away from the overflow valve core 621, a sealing gasket 633 is provided at the connection between the telescopic support rod 631 and the buffer oil tank 632, and one end of the telescopic support rod 631 is connected to the connecting pull plate 3; the buffer cylinder 63 is supported by the telescopic support rod 631, and the telescopic action of the telescopic support rod 631 is buffered by the buffer oil tank 632 during the telescopic process.

[0036] Reference Figure 7 A cylinder piston 634 is provided on the outer side of the telescopic support rod 631, and a buffer push block 635 is connected to the side of the cylinder piston 634 close to the buffer oil tank 632, and an overflow valve rod 636 is connected to the side of the cylinder piston 634 away from the buffer push block 635, and a connecting oil pipe 623 is connected between the overflow valve core 621 and the buffer oil chamber 6321; the telescopic support rod 631 divides the buffer cylinder 63 into two upper and lower chambers through the cylinder piston 634, and under normal conditions, the hydraulic oil in the buffer cylinder 63 is located in the upper chamber of the buffer cylinder 63.

[0037] Reference Figure 7, a buffer oil chamber 6321 is provided in the buffer oil tank 632, and one side of the buffer oil chamber 6321 is connected to an oil inlet channel 6322, and the relief valve rod 636 is meshed with the relief valve core 621, and the buffer oil chamber 6321 is meshed with the buffer push block 635; when the buffer cylinder 63 is in normal state, the relief valve rod 636 and the relief valve core 621 are interlocked, and the relief valve 62 is opened and closed by the relief valve rod 636. When the pull-off situation occurs, the telescopic support rod 631 has a pulling force to drive it to move upward, and the telescopic support rod 631 drives the oil cylinder piston 634 to move upward during the movement, and drives the hydraulic oil in the upper cabin of the buffer cylinder 63 to move into the buffer oil tank 632 during the movement, and the hydraulic oil first enters the buffer oil chamber 6321 through the oil inlet channel 6322 and the opening of the buffer oil chamber 6321, and the buffer oil chamber 632 1 enters the overflow valve core 621 through the connecting oil pipe 623, and when the buffer push block 635 enters the buffer oil chamber 6321, the buffer push block 635 reduces the gap of the opening of the buffer oil chamber 6321 to reduce the moving speed of the hydraulic oil, thereby completing the slowing down of the moving speed of the overflow valve rod 636, thereby reducing the impact generated during the breaking process, and at this time, the hydraulic oil enters the buffer oil chamber 6321 through the gap of the opening of the buffer oil chamber 6321 and the oil inlet channel 6322, and when the hydraulic oil is transferred to the overflow valve core 621, the hydraulic oil in the overflow valve core 621 flows back to the lower cabin in the buffer cylinder 63 through the return oil channel 622 and the opening of the overflow valve core 621, and when the overflow valve rod 636 moves in the reverse direction, the return stroke can also be slowed down through the overflow valve core 621 and the overflow valve rod 636.

[0038] The implementation principle of the present application is as follows: first, the force standard machine frame 1 is located on the detection platform, and the force standard machine frame 1 is located on the detection platform through the frame base 11, and the spacing between the fixed beam 12 and the movable beam 13 can be adjusted according to the detection range, and the movable beam 13 can be driven by the lifting and adjusting motor 16 to drive the telescopic column 15 to telescope and lift, thereby completing the adjustment of the spacing between the fixed beam 12 and the movable beam 13, and the lifting and adjusting motor 16 drives the transmission screw 161 to rotate through the synchronous belt 162, and the transmission screw 161 drives the lifting screw 151 to rotate in the screw transmission block 153 during the rotation process, and the lifting screw 151 drives the lifting column 152 to lift and move, thereby driving the movable beam 13 to move through the lifting column 152; Then the reaction frame 2 is connected to the tension device through the connecting pull plate 3, and in the detection process, the force value of the tension sensor 5 is calibrated by the standard sensor 4, and the strength and toughness of the material are detected by the tension sensor 5, and when the tension sensor 5 breaks, the sensor buffer plate 6 and the buffer cylinder 63 protect the standard sensor 4, and the sensor buffer plate 6 is connected to the movable crossbeam 13 through the sensor connecting plate 61. When the tension sensor 5 breaks, because the entire reaction frame 2 is point contact, the entire reaction frame 2 instantly releases energy upwards and then falls down. At this time, the overflow valve 62 is opened by the breaking force, and at the same time, the load of the buffer cylinder 63 is relied on to prevent the weight of the reaction frame 2 from pressing on the standard sensor 4 when it falls; When the buffer cylinder 63 is in normal state, the overflow valve rod 636 and the overflow valve core 621 are interlocked, and the overflow valve 62 is opened and closed by the overflow valve rod 636. When the pull-off situation occurs, the telescopic support rod 631 has the pulling force to drive it to move upward, and the telescopic support rod 631 drives the cylinder piston 634 to move upward during the movement, and drives the hydraulic oil in the upper cabin of the buffer cylinder 63 to move into the buffer oil tank 632 during the movement. The hydraulic oil first enters the buffer oil chamber 6321 through the oil inlet channel 6322 and the opening of the buffer oil chamber 6321, and the hydraulic oil in the buffer oil chamber 6321 enters the overflow valve core 621 through the connecting oil pipe 623, and when the buffer push block 635 enters the buffer oil chamber 6321, at this time, the buffer push block 635 reduces the gap of the opening of the buffer oil chamber 6321 to reduce the moving speed of the hydraulic oil, and then completes the slowing down of the moving speed of the overflow valve stem 636, thereby reducing the impact generated during the pulling process, and at this time, the hydraulic oil enters the buffer oil chamber 6321 through the gap of the opening of the buffer oil chamber 6321 and the oil inlet channel 6322, and when the hydraulic oil is transferred to the overflow valve core 621, the hydraulic oil in the overflow valve core 621 flows back to the lower compartment in the buffer cylinder 63 through the return oil channel 622 and the opening of the overflow valve core 621, and when the overflow valve stem 636 moves in the opposite direction, the return work can also be slowed down by the overflow valve core 621 and the overflow valve stem 636.

[0039] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A protection device for a tensile sensor to prevent it from breaking, comprising a force standard machine frame (1), characterized in that: The force standard machine frame (1) is internally connected to a reaction frame (2), the force standard machine frame (1) comprises a frame base (11) and a movable crossbeam (13), a fixed crossbeam (12) is arranged between the frame base (11) and the movable crossbeam (13), a sensor buffer pad (6) is connected to the top of the movable crossbeam (13), a standard sensor (4) is arranged at the center position of the top of the sensor buffer pad (6), and a plurality of buffer cylinders (63) are arranged on the outside of the standard sensor (4); The reaction frame (2) comprises an upper crossbeam (21) and a lower crossbeam (22) of the reaction frame, a detection connecting plate (23) is arranged between the upper crossbeam (21) and the lower crossbeam (22), a pull sensor (5) is connected between the detection connecting plate (23) and the fixed crossbeam (12), both ends of the pull sensor (5) are connected to connecting pull heads (51), and two groups of connecting pull heads (51) are respectively connected to the fixed crossbeam (12) and the detection connecting plate (23).

2. A protection device for preventing a pull-type sensor from being pulled apart according to claim 1, characterized in that: A supporting column (14) is provided between the frame base (11) and the fixed crossbeam (12), a telescopic column (15) is provided between the fixed crossbeam (12) and the movable crossbeam (13), a lifting and lowering adjustment motor (16) and two sets of transmission screws (161) are provided on one side of the fixed crossbeam (12), and the two sets of transmission screws (161) are respectively provided on both sides of the lifting and lowering adjustment motor (16).

3. A protection device for preventing a pull-type sensor from being pulled apart according to claim 2, characterized in that: The telescopic column (15) comprises a screw transmission block (153), a lifting screw (151) and a lifting column (152); the screw transmission block (153) is connected to the inside of the fixed crossbeam (12), and the lifting screw (151) is connected between the lifting column (152) and the screw transmission block (153).

4. The protection device for preventing a pull-type sensor from being pulled apart according to claim 3, characterized in that: A synchronous belt (162) is connected between the output shaft of the lifting and lowering adjustment motor (16) and one end of the two sets of transmission screws (161), and the transmission screws (161) and the lifting screws (151) are meshed with each other in the screw transmission block (153).

5. The protection device for preventing a pull-type sensor from being pulled apart according to claim 1, characterized in that: A plurality of groups of supporting columns (24) are connected between the upper crossbeam (21) of the reaction frame, the lower crossbeam (22) of the reaction frame, and the detection connecting plate (23), and the plurality of groups of supporting columns (24) are plugged into and connected to the movable crossbeam (13) and the fixed crossbeam (12), the lower crossbeam (22) of the reaction frame is connected to the top of the frame base (11), and the top of the upper crossbeam (21) of the reaction frame is connected to a connecting pull plate (3).

6. The protection device for preventing a pull-type sensor from being pulled apart according to claim 1, characterized in that: A sensor connection pad (61) is connected between the sensor buffer pad (6) and the movable crossbeam (13), a relief valve (62) is connected between the buffer cylinder (63) and the sensor buffer pad (6), a relief valve core (621) is provided in the relief valve (62), and an oil return channel (622) is provided on one side of the relief valve core (621).

7. The protection device for preventing a pull-type sensor from being pulled apart according to claim 6, characterized in that: A telescopic support rod (631) is slidably connected inside the buffer cylinder (63), and a buffer oil bin (632) is arranged away from the buffer cylinder (63). A sealing gasket (633) is arranged at the connection between the telescopic support rod (631) and the buffer oil bin (632), and one end of the telescopic support rod (631) is connected to the connecting pull plate (3).

8. The protection device for preventing a pull-type sensor from being pulled apart according to claim 7, characterized in that: An oil cylinder piston (634) is arranged on the outer side of the telescopic support rod (631), and a side of the oil cylinder piston (634) close to the buffer oil tank (632) is connected to a buffer push block (635), a side of the oil cylinder piston (634) away from the buffer push block (635) is connected to an overflow valve rod (636), and a connecting oil pipe (623) is connected between the overflow valve core (621) and the buffer oil tank (632).

9. A protection device for preventing a pull-type sensor from being pulled apart according to claim 8, characterized in that: A buffer oil chamber (6321) is provided in the buffer oil tank (632), and one side of the buffer oil chamber (6321) is connected to an oil inlet channel (6322), and the overflow valve stem (636) and the overflow valve core (621) are meshed with each other, and the buffer oil chamber (6321) and the buffer push block (635) are meshed with each other.

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