A hydraulic swing cutting machine for steel structure grid

Abstract

The present invention belongs to the field of metal cutting technology, and in particular relates to a hydraulic swing shearing machine for steel structure grids, comprising a machine body, wherein a pressing unit, a knife shaft, a cutting knife group and a hydraulic drive unit are arranged inside the machine body through the rotation of the knife shaft, and the hydraulic drive unit is used to drive the cutting knife group to rotate around the knife shaft, and the hydraulic drive unit is used to drive the pressing unit to press and fix the workpiece, and further comprises: a follower column installed at the end of the knife holder of the cutting knife group, and the follower column rotates synchronously with the cutting knife group. The present invention can quickly cut steel structure grid substrates, and reduce the damage to the hydraulic system and the eccentric wear of the knife shaft caused by sudden changes in resistance, effectively improving the reliability and stability of the equipment operation, and at the same time can assist the cutter in heat dissipation and cooling to avoid excessive tool temperature. In addition, it can also estimate the wear of the cutter based on the instantaneous force, and promptly remind personnel to repair it.

Description

Technical Field

[0001] The invention belongs to the technical field of metal cutting, and in particular relates to a hydraulic swing cutting machine for steel structure grids. Background Art

[0002] Steel structure grids need to be processed into suitable rods, nodes and other components through cutting to meet the spatial structural dimensional accuracy requirements of the grid, ensure the precise splicing and force transmission of each component, and guarantee the overall structural stability and mechanical properties. Special cutting equipment is generally required during cutting.

[0003] In the processing of steel structure grids, steel needs to be cut into suitable rods, nodes and other components to ensure the precise splicing and structural stability of the grid. For example, patent CN214815207U discloses a hydraulic swing shearing machine for steel structure grids, which cuts the substrate by swinging the cutter. During cutting, the cutter will first be blocked by the substrate, and as the hydraulic pressure applied to the tool holder by the hydraulic system gradually increases, the cutter can cut the substrate. At the moment of cutting, the blocking force of the substrate on the cutter disappears. Due to the inertia of the tool holder and the response characteristics of the hydraulic system, the hydraulic system pressure will suddenly change and produce an impact, aggravating the wear of pipelines and valves, and affecting the stability and life of the system. Secondly, under the action of this relationship, the rotation speed of the tool holder shaft will also be instantly accelerated, aggravating the wear of the bearings at the tool holder shaft. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydraulic swing shearing machine for steel structure grid in view of the above problems.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a hydraulic swing shearing machine for steel structure grid, comprising a machine body, wherein a pressing unit, a knife shaft, a cutting knife group and a hydraulic drive unit are arranged inside the machine body, wherein the cutting knife group is arranged inside the machine body by rotating the knife shaft, and the hydraulic drive unit is used to drive the cutting knife group to rotate around the knife shaft, and the hydraulic drive unit is used to drive the pressing unit to press and fix the workpiece, and further comprising:

[0006] A follower column is fixedly mounted on the end of the blade holder of the cutting blade assembly, and the follower column rotates synchronously with the cutting blade assembly;

[0007] A square cylinder is arranged above the follower column. The body is equipped with an adjustment mechanism, and the adjustment mechanism is used to adjust the height of the square cylinder. A buffer unit is installed inside the square cylinder, and the buffer unit is used to buffer and block the follower column.

[0008] a heat dissipation unit installed inside the machine body and disposed below the cutter of the cutting knife assembly, the heat dissipation unit being used to accelerate airflow around the cutter of the cutting knife assembly, and the heat dissipation unit being in communication with the interior of the square cylinder;

[0009] The early warning unit is installed on the side wall of the square cylinder and is connected with the interior of the square cylinder. The early warning unit counts according to the air pressure value inside the square cylinder.

[0010] Preferably, the adjustment mechanism includes a support block fixedly mounted inside the machine body, and the support block is arranged above the square cylinder, the end face of the support block is threadedly connected with an adjusting screw, and the adjusting screw is rotatably connected to the top of the square cylinder, and two guide rods are fixedly mounted on the top of the square cylinder, and both guide rods are slidably connected to the end face of the support block.

[0011] Preferably, the buffer unit includes a piston plate slidably arranged inside the square cylinder, and a cylinder is fixedly installed on the bottom of the piston plate, the cylinder is slidably connected to the bottom of the square cylinder, the bottom of the cylinder is fixedly connected to a hemispherical block, a limit frame is fixedly installed on the upper inner side of the square cylinder, and the piston plate is arranged below the limit frame, a support spring is fixedly installed between the bottom of the piston plate and the inner side wall of the lower end of the square cylinder, and when the follower column rotates with the tool holder of the cutting knife group, the follower column will hit the hemispherical block and push the hemispherical block upward.

[0012] Preferably, the heat dissipation unit includes a strip plate fixedly installed inside the machine body, and a strip air cavity is opened inside the strip plate, a plurality of nozzles are fixedly connected to the upper cavity wall of the strip air cavity, an air inlet pipe and an air outlet pipe are fixedly connected to the upper end of the side wall of the square cylinder, a one-way valve is installed inside the air inlet pipe and the air outlet pipe, a connecting hose connected to the air outlet pipe is fixedly connected to the side wall of the square cylinder, and the end of the connecting hose away from the square cylinder is fixedly connected to a gas supply hard pipe, and the gas supply hard pipe is connected to the strip air cavity.

[0013] Preferably, the early warning unit includes a mounting sleeve fixedly inserted into the upper end of the side wall of the square cylinder, and an air pressure detection probe is fixedly installed on the end of the mounting sleeve, the pressure measuring end of the air pressure detection probe is arranged inside the mounting sleeve, and a counter is fixedly installed on the outer wall of the square cylinder. The air pressure detection probe converts the air pressure into an electrical signal and feeds it back to the counter, and the counter feeds back the electrical signal to the control end of the body after the count reaches a threshold.

[0014] Preferably, a plurality of semiconductor refrigeration rods are fixedly plugged into the upper cavity wall of the strip-shaped air cavity, and the cooling end of each semiconductor refrigeration rod is arranged inside the strip-shaped air cavity. Each of the semiconductor refrigeration rods and each of the nozzles are staggered and arranged in the same row, and the semiconductor refrigeration rod is electrically connected to the control end of the body.

[0015] Preferably, an air pressure tube is fixedly connected to the side wall of the square cylinder at a position above the limit frame, and a pressure relief valve is provided at the end of the air pressure tube.

[0016] Preferably, an air filter is provided on one side of the square cylinder, and the air filter is detachably connected to the air intake pipe.

[0017] Compared with the existing technology, the advantages of a hydraulic swing shearing machine for steel structure grid are:

[0018] 1. Through the mutual cooperation of the machine body, pressing unit, cutter shaft and hydraulic drive unit, the steel structure grid substrate can be quickly cut. Through the mutual cooperation of the follower column, square cylinder and buffer unit, the cutter holder can be buffered and decelerated after the cutting knife group cuts the substrate. On the one hand, it can avoid the damage to the hydraulic system caused by sudden change of resistance. On the other hand, it can avoid the eccentric wear of the cutter shaft due to the sudden increase of speed, effectively improving the reliability and stability of the hydraulic swing shearing machine.

[0019] 2. By setting up the heat dissipation unit, the airflow generated by the buffer unit in conjunction with the follower column and the square cylinder can be used to assist in heat dissipation and cooling of the cutters of the cutting knife group, thereby minimizing the temperature of the cutters of the cutting knife group from being too high during continuous cutting.

[0020] 3. By setting up an early warning unit, the wear of the cutter of the cutting knife group can be roughly estimated based on the instantaneous force exerted by the follower column on the buffer unit when the substrate is cut, so that the personnel can be reminded in time to repair the wear of the cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front perspective structural diagram of a hydraulic swing-type shearing machine for steel structure grids provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the back three-dimensional structure of a hydraulic swing shearing machine for a steel structure grid provided by the present invention;

[0023] Figure 3 The invention provides a hydraulic swing shearing machine for steel structure grid Figure 2 A magnified view of the structure of part A;

[0024] Figure 4 This is a schematic diagram of the internal structure of a square cylinder of a hydraulic swing-type shearing machine for a steel structure grid provided by the present invention;

[0025] Figure 5 This is a schematic cross-sectional view of a strip plate of a hydraulic swing-type shearing machine for a steel structure grid provided by the present invention;

[0026] Figure 6 The invention provides a hydraulic swing shearing machine for steel structure grid Figure 4 A magnified view of the structure of part B.

[0027] In the figure: 1 body, 2 pressing unit, 3 knife shaft, 4 cutting knife group, 5 hydraulic drive unit, 6 follower column, 7 square cylinder, 8 adjustment mechanism, 81 support block, 82 adjusting screw, 83 guide rod, 9 buffer unit, 91 piston plate, 92 cylinder, 93 hemispherical block, 94 limit frame, 95 support spring, 10 heat dissipation unit, 101 strip plate, 102 strip air cavity, 103 nozzle, 104 air inlet pipe, 105 air outlet pipe, 106 one-way valve, 107 connecting hose, 108 air transmission hard pipe, 11 early warning unit, 111 installation sleeve, 112 air pressure detection probe, 113 counter, 12 semiconductor refrigeration rod, 13 air pressure pipe, 14 pressure relief valve, 15 air filter. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figures 1-6 As shown, a hydraulic swing shearing machine for steel structure grid includes a machine body 1, wherein a pressing unit 2, a knife shaft 3, a cutting knife group 4 and a hydraulic drive unit 5 are arranged inside the machine body 1, and the cutting knife group 4 is arranged inside the machine body 1 through the rotation of the knife shaft 3. The hydraulic drive unit 5 is used to drive the cutting knife group 4 to rotate around the knife shaft 3, and the hydraulic drive unit 5 is used to drive the pressing unit 2 to press and fix the workpiece. It also includes: a follower column 6, which is fixedly installed on the end of the knife holder of the cutting knife group 4. The follower column 6 rotates synchronously with the cutting knife group 4. The square cylinder 7 is arranged above the follower column 6. The machine body 1 is equipped with an adjustment mechanism 8, and the adjustment mechanism The mechanism 8 is used to adjust the height of the square cylinder 7. The adjusting mechanism 8 includes a support block 81 fixedly mounted inside the machine body 1, and the support block 81 is arranged above the square cylinder 7. The end face of the support block 81 is threadedly connected with an adjusting screw 82, and the adjusting screw 82 is rotatably connected to the top of the square cylinder 7. Two guide rods 83 are fixedly mounted on the top of the square cylinder 7, and the two guide rods 83 are both slidably connected to the end face of the support block 81. By rotating the adjusting screw 82 and cooperating with the guide rod 83, the height of the square cylinder 7 can be adjusted, so that it can be suitable for regulating the distance between the square cylinder 7 and the follower column 6 when cutting substrates of different thicknesses.

[0030] A buffer unit 9 is installed inside the square cylinder 7, and the buffer unit 9 is used to buffer and block the follower column 6. The buffer unit 9 includes a piston plate 91 slidably arranged inside the square cylinder 7, and a cylinder 92 is fixedly installed at the bottom of the piston plate 91. The cylinder 92 is slidably connected to the bottom of the square cylinder 7, and a hemispherical block 93 is fixedly connected to the bottom of the cylinder 92. A limit frame 94 is fixedly installed on the upper side of the interior of the square cylinder 7, and the piston plate 91 is arranged below the limit frame 94. A supporting spring 95 is fixedly installed between the bottom of the piston plate 91 and the inner side wall of the lower end of the square cylinder 7. When the follower column 6 rotates with the tool holder of the cutting knife group 4, the follower column 6 will hit the hemispherical block 93 and push the hemispherical block 93 upward. The moving resistance of the piston plate 91 and the extrusion force required for compressed air can apply a blocking force to the follower column 6. The follower column 6 and the hemispherical block 93 are both made of wear-resistant materials and can be disassembled and replaced.

[0031] The heat dissipation unit 10 is installed inside the machine body 1, and the heat dissipation unit 10 is arranged below the cutter of the cutting knife group 4. The heat dissipation unit 10 is used to accelerate the air flow around the cutter of the cutting knife group 4, and the heat dissipation unit 10 is connected to the interior of the square cylinder 7. The heat dissipation unit 10 includes a strip plate 101 fixedly installed inside the machine body 1, and a strip air cavity 102 is opened inside the strip plate 101. A plurality of nozzles 103 are fixedly plugged into the upper cavity wall of the strip air cavity 102. The upper end of the side wall of the square cylinder 7 is fixedly plugged into the upper cavity wall of the square cylinder 7. An air inlet pipe 104 and an air outlet pipe 105 are fixedly connected, and a one-way valve 106 is installed inside the air inlet pipe 104 and the air outlet pipe 105. A connecting hose 107 connected to the air outlet pipe 105 is fixedly plugged into the side wall of the square cylinder 7. An air supply hard pipe 108 is fixedly connected to the end of the connecting hose 107 away from the square cylinder 7, and the air supply hard pipe 108 is connected to the strip air cavity 102. By increasing the airflow around the cutting knife group 4, the cutting knife of the cutting knife group 4 can be assisted to cool down.

[0032] A plurality of semiconductor refrigeration rods 12 are fixedly connected to the upper cavity wall of the strip air cavity 102, and the cooling end of each semiconductor refrigeration rod 12 is arranged inside the strip air cavity 102. Each semiconductor refrigeration rod 12 and each nozzle head 103 are staggered with each other, and the semiconductor refrigeration rod 12 and the nozzle head 103 are in the same row. The semiconductor refrigeration rod 12 is electrically connected to the control end of the body 1. When the semiconductor refrigeration rod 12 is working, it can transfer the heat inside the strip air cavity 102 to the outside to assist in cooling the air inside it. The hot end of the semiconductor refrigeration rod 12 is outside the strip air cavity 102. The semiconductor refrigeration rod 12 can perform cooling work for about 2 hours at a time. The control end of the body 1 controls the semiconductor refrigeration rod 12 to suspend work for 10 minutes every 2 hours.

[0033] An air pressure tube 13 is fixedly connected to the side wall of the square cylinder 7 at a position above the limit frame 94, and a pressure relief valve 14 is provided at the end of the air pressure tube 13. When the air pressure is too high, the valve plate of the pressure relief valve 14 can be opened under the action of the air pressure to avoid damage to the piston plate 91 caused by excessive air pressure.

[0034] An air filter 15 is provided on one side of the square cylinder 7 , and the air filter 15 is detachably connected to the air intake pipe 104 . The air filter 15 can filter dust and other impurities in the air entering the air intake pipe 104 to prevent dust from clogging the nozzle 103 .

[0035] The early warning unit 11 is installed on the side wall of the square cylinder 7 and is connected to the interior of the square cylinder 7. The early warning unit 11 counts according to the air pressure value inside the square cylinder 7. The early warning unit 11 includes a mounting sleeve 111 fixedly plugged into the upper end of the side wall of the square cylinder 7, and an air pressure detection probe 112 is fixedly installed at the end of the mounting sleeve 111. The pressure measuring end of the air pressure detection probe 112 is arranged inside the mounting sleeve 111. A counter 113 is fixedly installed on the outer wall of the square cylinder 7. The air pressure detection probe 112 converts the air pressure into an electrical signal and feeds it back to the counter 113. After the count reaches a threshold, the counter 113 feeds back an electrical signal to the control end of the body 1. The counter 113 can count different values ​​according to the strength of the feedback electrical signal, so that the wear of the cutter can be roughly estimated based on the hardness of the substrate.

[0036] The operating principle of the present invention is now described as follows: When cutting the steel structure grid substrate, the substrate is placed on the cutting table of the machine body 1, and then the cutting work is started by stepping on the foot switch. After the cutting work is started, the control end of the machine body 1 will control the hydraulic drive unit 5 to work, and the hydraulic drive unit 5 drives the pressing unit 2 to press the workpiece and drives the cutting knife group 4 to rotate around the knife shaft 3. The cutting knife of the cutting knife group 4 then cuts the substrate (wherein the pressing unit 2 includes at least a plurality of hydraulic cylinders, a pressing block, and an elastic member, each hydraulic The cylinder is connected to the hydraulic oil pipeline of the hydraulic drive unit 5. The hydraulic drive unit 5 includes a hydraulic station, hydraulic oil pipelines, valves, a top pressure hydraulic cylinder, a slider and other components. The hydraulic station delivers hydraulic oil to the hydraulic cylinder of the pressing unit 2 through the hydraulic oil pipeline, driving the pressing block of the pressing unit 2 to move downward to press the workpiece. Secondly, the hydraulic drive unit 5 drives the top pressure hydraulic cylinder to move telescopically through the hydraulic oil, and cooperates with the slider and other components to rotate the tool holder of the cutting knife group 4 around the knife shaft 3, so that the cutting knife of the cutting knife group 4 can shear the substrate);

[0037] When the cutting knife group 4 is cutting the substrate, the follower column 6 will rotate synchronously with the knife holder of the cutting knife group 4. When the cutting knife group 4 is about to cut the substrate, the follower column 6 contacts the hemispherical block 93. At the moment of cutting the substrate, the blocking force of the substrate on the cutter of the cutting knife group 4 disappears, and the force acting on the hydraulic drive unit 5 disappears synchronously at this time. In order to prevent the influence of such sudden force on the hydraulic drive unit 5 (for example, the spool of the reversing valve in the hydraulic system is violently impacted by the instantaneous pressure change, resulting in wear of the sealing surface between the spool and the valve seat, resulting in internal leakage), the hemispherical block 93 is used to The blocking of the follower column 6 ensures that the blocking force on the hydraulic drive unit 5 does not disappear at the moment the substrate is cut, thereby allowing the hydraulic drive unit 5 to gradually adapt to the disappearance of the blocking force, avoiding sudden changes in the force on the hydraulic drive unit 5, and facilitating stable operation of the hydraulic drive unit 5 and minimizing damage (wherein, a pressure sensor is installed at the driving end of the hydraulic drive unit 5 or the piston plate 91. After detecting that the pressure reaches a certain threshold, the hydraulic drive unit 5 first slows down the oil supply speed of the hydraulic station and then controls the operation of the reversing valve to reverse the direction of the hydraulic oil, causing the cutting knife group 4 to rotate and reset);

[0038] Secondly, the follower column 6 presses the hemispherical block 93, and the hemispherical block 93 pushes the piston plate 91 upward through the cylinder 92. The upward movement of the piston plate 91 compresses the air inside the square cylinder 7 (the movement resistance of the piston plate 91 and the extrusion force required for compressing the air can apply a blocking force to the follower column 6). The squeezed air can only be discharged through the air outlet pipe 105 under the action of the one-way valve 106. The airflow finally enters the strip air cavity 102 through the connecting hose 107 and the air delivery hard pipe 108, and is finally ejected through each nozzle 103. Secondly, after the control end of the body 1 is started, it will control the operation of each semiconductor refrigeration rod 12. Each semiconductor refrigeration rod 12 can cool and cool the air inside the strip air cavity 102 (the temperature is about 5°C), so that the cold air flow ejected by the nozzle 103 can accelerate the air flow around the cutting knife of the cutting knife group 4, assist in cooling the cutting knife group 4, and facilitate the cutting knife group 4 to continue cutting;

[0039] At the same time, since the hardness of different substrates of the steel structure grid is different, and the same substrate also has differences due to material reasons, the hydraulic pressure required by the hydraulic drive unit 5 to drive the cutting knife group 4 to cut the substrate is different, so the top pressure applied by the follower column 6 to the hemispherical block 93 is also different each time, which causes the piston plate 91 to compress the inside of the square cylinder 7 at different compression speeds. The different compression speeds of the piston plate 91 compressing the air inside the square cylinder 7 will cause different air pressures inside the square cylinder 7. The air pressure detection probe 112 will detect the air pressure inside the square cylinder 7 and convert the air pressure into an electrical signal and feed it back to the counter 113. The counter 113 counts different values ​​according to the strength of the feedback electrical signal. For example, when the strength of the substrate is relatively large, the hydraulic pressure applied by the hydraulic drive unit 5 will increase synchronously, and the speed at which the piston plate 91 compresses the air inside the square cylinder 7 will increase. At this time, since the air inside the square cylinder 7 cannot be discharged in time, the air pressure inside the square cylinder 7 increases faster, so the air pressure detected by the air pressure detection probe 112 is relatively large, which causes the counter 113 to receive different values ​​of the air pressure. The electrical signal strength fed back by the detection probe 112 is too high, and the value counted by the counter 113 becomes larger at this time (the electrical signal strength fed back by the air pressure detection probe 112 is recorded as A1, A2, and A3, A1 corresponds to an electrical signal of less than 10 mA, A2 corresponds to an electrical signal of ≥10 mA and less than 15 mA, and A3 corresponds to an electrical signal of ≥15 mA. When the counter 113 receives an electrical signal within the range of A1, the count it increases is "1", the count it increases for A2 is "2", and the count it increases for A3 is "3"). Due to the shear When cutting a substrate with relatively high hardness, the wear of the cutter of the cutting knife group 4 will also increase. Therefore, the single count of the counter 113 will be relatively large, and vice versa. Therefore, the wear of the cutter can be roughly estimated based on the hardness of the substrate. When the count of the counter 113 reaches a threshold (the threshold is set based on the material of the cutter of the cutting knife group 4, etc.), the counter 113 will feedback an electrical signal to the control end of the body 1, and the control end of the body 1 will issue a prompt message to remind the personnel to repair the wear of the cutter of the cutting knife group 4.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic swing shearing machine for a steel structure grid, comprising a machine body (1), wherein a pressing unit (2), a knife shaft (3), a cutting knife group (4) and a hydraulic drive unit (5) are arranged inside the machine body (1), wherein the cutting knife group (4) is arranged inside the machine body (1) so as to rotate through the knife shaft (3), and the hydraulic drive unit (5) is used to drive the cutting knife group (4) to rotate around the knife shaft (3), and the hydraulic drive unit (5) is used to drive the pressing unit (2) to press and fix the workpiece, characterized in that: Also includes: A follower column (6) is fixedly mounted on the end of the knife frame of the cutting knife group (4), and the follower column (6) rotates synchronously with the cutting knife group (4); A square cylinder (7) is arranged above the follower column (6); the machine body (1) is equipped with an adjustment mechanism (8), and the adjustment mechanism (8) is used to adjust the height of the square cylinder (7); a buffer unit (9) is installed inside the square cylinder (7), and the buffer unit (9) is used to buffer and block the follower column (6); A heat dissipation unit (10) is installed inside the machine body (1), and the heat dissipation unit (10) is arranged below the cutter of the cutting knife group (4), and the heat dissipation unit (10) is used to accelerate the flow of air around the cutter of the cutting knife group (4), and the heat dissipation unit (10) is connected to the interior of the square cylinder (7); An early warning unit (11) is installed on the side wall of the square cylinder (7) and is connected to the interior of the square cylinder (7). The early warning unit (11) counts different values ​​according to the size of the air pressure value inside the square cylinder (7) to roughly estimate the wear of the cutting knife of the cutting knife group (4); The buffer unit (9) includes a piston plate (91) slidably arranged inside the square cylinder (7), and a cylinder (92) is fixedly installed at the bottom of the piston plate (91), the cylinder (92) is slidably connected to the bottom of the square cylinder (7), and the bottom of the cylinder (92) is fixedly connected to a hemispherical block (93), a limit frame (94) is fixedly installed on the upper side of the interior of the square cylinder (7), and the piston plate (91) is arranged below the limit frame (94), and a support spring (95) is fixedly installed between the bottom of the piston plate (91) and the inner side wall of the lower end of the square cylinder (7), and the follower column (6) rotates with the knife holder of the cutting knife group (4). When the cutting knife group (4) is about to cut the substrate, the follower column (6) will hit the hemispherical block (93) and push the hemispherical block (93) upward.

2. The hydraulic swing shearing machine for steel structure grid according to claim 1, characterized in that: The adjustment mechanism (8) includes a support block (81) fixedly mounted inside the machine body (1), and the support block (81) is arranged above the square cylinder (7). The end surface of the support block (81) is threadedly connected to an adjustment screw (82), and the adjustment screw (82) is rotatably connected to the top of the square cylinder (7). Two guide rods (83) are fixedly mounted on the top of the square cylinder (7), and the two guide rods (83) are both slidably connected to the end surface of the support block (81).

3. The hydraulic swing shearing machine for steel structure grid according to claim 1, characterized in that: The heat dissipation unit (10) comprises a strip plate (101) fixedly mounted inside the machine body (1), and a strip air cavity (102) is provided inside the strip plate (101), a plurality of nozzles (103) are fixedly plugged into the upper cavity wall of the strip air cavity (102), an air inlet pipe (104) and an air outlet pipe (105) are fixedly connected to the upper end of the side wall of the square cylinder (7), a one-way valve (106) is installed inside both the air inlet pipe (104) and the air outlet pipe (105), a connecting hose (107) connected to the air outlet pipe (105) is fixedly plugged into the side wall of the square cylinder (7), and an end of the connecting hose (107) away from the square cylinder (7) is fixedly connected to a gas transmission hard pipe (108), and the gas transmission hard pipe (108) is connected to the strip air cavity (102).

4. The hydraulic swing shearing machine for steel structure grid according to claim 1, characterized in that: The early warning unit (11) comprises a mounting sleeve (111) fixedly plugged into the upper end of the side wall of the square cylinder (7), and an air pressure detection probe (112) is fixedly mounted on the end of the mounting sleeve (111), the pressure measuring end of the air pressure detection probe (112) is arranged inside the mounting sleeve (111), and a counter (113) is fixedly mounted on the outer side wall of the square cylinder (7), the air pressure detection probe (112) converts the air pressure into an electrical signal and feeds it back to the counter (113), and the counter (113) feeds back the electrical signal to the control end of the machine body (1) after the count reaches a threshold.

5. The hydraulic swing shearing machine for steel structure grid according to claim 3, characterized in that: A plurality of semiconductor refrigeration rods (12) are fixedly plugged into the upper cavity wall of the strip-shaped air cavity (102), and the refrigeration end of each semiconductor refrigeration rod (12) is arranged inside the strip-shaped air cavity (102). Each semiconductor refrigeration rod (12) and each nozzle (103) are staggered and arranged in the same row, and the semiconductor refrigeration rod (12) is electrically connected to the control end of the body (1).

6. The hydraulic swing shearing machine for steel structure grid according to claim 1, characterized in that: An air pressure tube (13) is fixedly connected to the side wall of the square cylinder (7) at a position above the limit frame (94), and a pressure relief valve (14) is provided at the end of the air pressure tube (13).

7. The hydraulic swing shearing machine for steel structure grid according to claim 3, characterized in that: An air filter (15) is provided on one side of the square cylinder (7), and the air filter (15) is detachably connected to the air intake pipe (104).

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