Groove supporting device

Abstract

The invention discloses a groove supporting device, and relates to the field of groove supporting. The groove supporting device comprises two supporting steel plates which are oppositely arranged, and a supporting trolley is arranged between the two supporting steel plates. The supporting trolley comprises a trolley body, an advancing device arranged at the bottom of the trolley body, a counterweight assembly arranged in the trolley body and an auxiliary supporting assembly arranged on the trolley body and used for being detachably connected with the supporting steel plate. The supporting trolley further comprises a first size adjusting mechanism and a second size adjusting mechanism, the first size adjusting mechanism is used for adjusting the trolley body to stretch out and draw back in the width direction of the groove, and the second size adjusting mechanism is used for adjusting the trolley body to stretch out and draw back in the height direction of the groove. According to the groove supporting device, the technical problem that a groove supporting frame body is difficult to assemble is solved, rapid installation can be achieved, and safety is high.

Description

Technical Field

[0001] The present application relates to the field of trench support, and in particular to a trench support device. Background Art

[0002] In the fields of municipal engineering and underground pipeline construction, the support operation after trench excavation is a key link to ensure construction safety. The traditional support technology generally combines a support frame and a retaining wall steel plate. During support, the retaining wall steel plate is attached to the side wall of the trench, and the support frame is located on the side of the retaining wall steel plate away from the trench side wall and abuts against the retaining wall steel plate to prevent the retaining wall steel plate from tipping over. However, this technology has obvious drawbacks: 1. When this support structure supports the trench unilaterally, due to the relatively light self-weight of the support frame and the relatively heavy retaining wall steel plate, it is difficult for the two to maintain mechanical balance during the support process, and structural overturning or deformation is likely to occur, seriously affecting construction safety and project quality; 2. When installing the traditional support frame, large mechanical equipment such as cranes and excavators are required to lift and align it with the trench for installation. This not only requires a large number of manual workers to cooperate, increasing labor costs, but also has safety hazards such as falling from height and mechanical injuries during the operation process.

[0003] With the accelerating advancement of urbanization construction, the number of municipal engineering and underground pipeline construction projects is increasing day by day, posing higher standards for construction efficiency and safety. Therefore, researching and developing a new support technology that can achieve rapid installation, adapt to different construction environments and has high safety performance has become an important issue that needs to be solved urgently at present. Summary of the Invention

[0004] In order to solve the technical problem of the difficult assembly of the existing trench support frame, speed up the installation progress and improve the safety performance, the present application provides a trench support device.

[0005] A trench support device includes two relatively arranged support steel plates. A support trolley is arranged between the two support steel plates. The support trolley includes a trolley body, a traveling device arranged at the bottom of the trolley body, a counterweight assembly arranged inside the trolley body, and an auxiliary support assembly arranged on the trolley body for detachably connecting with the support steel plate. Among them, the trolley body further includes a first size adjustment mechanism and a second size adjustment mechanism. The first size adjustment mechanism is used to adjust the trolley body to expand and contract along the width direction of the trench, and the second size adjustment mechanism is used to adjust the trolley body to expand and contract along the height direction of the trench.

[0006] Through the above technical solution, the trolley body can adjust the width and height of the trolley body according to the width and height of the groove through the first size adjustment mechanism and the second size adjustment mechanism, so that the auxiliary support component of the trolley body abuts against the support steel plate to achieve support, thus meeting the support requirements for grooves of different specifications and sizes, which is beneficial to increasing the reuse rate of the trolley; on the other hand, a counterweight component is added. The setting of the counterweight component can increase the friction between the support trolley and the ground. When the groove support device of the present application is used for unilateral support of the groove, the support trolley is not prone to tipping over, which can improve the support stability of the support device. Among them, after adding the counterweight component, the difficulty of manual handling increases, and there are great safety hazards when using lifting machinery and equipment such as cranes for hoisting. Therefore, the present application adds a traveling device at the bottom of the trolley body. The setting of the traveling device can realize the autonomous movement of the trolley body, reduce the cost of manual handling, improve the safety performance, and is also beneficial to accelerating the installation progress of the support device.

[0007] Further, at least one horizontal judgment component is also provided on the trolley body, and the horizontal judgment component is arranged on the top of the trolley body.

[0008] Through the above technical solution, the horizontal judgment component is used to judge whether the trolley body is in a horizontal state in the groove. Since the inclination of the bottom of the groove will cause uneven stress on the support trolley, local stress concentration, which is likely to cause deformation or slip. At the same time, the inclination may cause the support to be not in close contact with the support steel plate or the bottom of the groove, reducing the friction and support effect, and ultimately increasing the risk of collapse. The horizontal judgment device effectively monitors the horizontal state of the support trolley and makes local adjustments to avoid the support failure caused by the inclination of the bottom of the groove, and improves the construction accuracy and safety reliability.

[0009] Further, the first size adjustment mechanism and the second size adjustment mechanism respectively adopt hydraulic adjustment mechanisms. The hydraulic adjustment mechanism includes a hydraulic telescopic member and a hydraulic driving member, and the hydraulic driving member drives the hydraulic telescopic member to expand and contract in a straight line direction.

[0010] Through the above technical solution, compared with the traditional pneumatic adjustment structure, the hydraulic adjustment mechanism is more uniform and controllable through the flow of oil, the telescopic process is more stable, it can meet the dynamic adjustment requirements under complex working conditions, improve the adjustment efficiency and the stability of the support structure, and has extremely high safety performance. On the other hand, since the hydraulic adjustment mechanism can perform telescopic fine adjustment and further combine with the horizontal judgment device to make adaptive adjustments to the width and height, the trolley body can maintain a horizontal state in the groove.

[0011] Further, the auxiliary support component includes at least two auxiliary support members, and the two auxiliary support members are respectively arranged close to the top and the bottom of the trolley body.

[0012] Through the above technical solution, the auxiliary support members are arranged at the top and bottom of the trolley body, forming upper and lower support points on one side of the trolley body, dispersing the force on the support steel plate, reducing the possibility of local deformation of the support device, and enhancing the overall stability of the unilateral support of the support structure.

[0013] Furthermore, there are two groups of auxiliary support assemblies, and the two groups of auxiliary support assemblies are respectively arranged on the opposite sides of the trolley body.

[0014] Through the above technical solution, when auxiliary support assemblies are respectively arranged on the opposite sides of the trolley body, the two opposite side walls of the trench can be supported simultaneously, which is applicable to the scenario of bilateral support.

[0015] Furthermore, the auxiliary support member includes an auxiliary support leg and an electromagnetic adsorption device arranged at the end of the auxiliary support leg. The trolley body is fixedly connected to the surface of the support steel plate through the electromagnetic adsorption device. Among them, a hydraulic telescopic member is arranged inside the auxiliary support leg, and the hydraulic telescopic member is used to control the electromagnetic adsorption device to expand and contract along the width direction of the trench.

[0016] Through the above technical solution, the electromagnetic adsorption device generates magnetic force when powered on, so that the trolley body is firmly connected to the support steel plate through the magnetic adsorption effect of the electromagnetic adsorption device, thereby realizing the support function of the support device. After power off, it can be quickly separated from the support steel plate, simplifying the operation process and being very convenient.

[0017] Furthermore, a bulldozing mechanism is arranged at the front end of the trolley body. The bulldozing mechanism includes a connecting arm and a bulldozing plate. One end of the connecting arm is connected to the trolley body, and the other end is connected to the bulldozing plate.

[0018] Through the above technical solution, a bulldozing mechanism is arranged at the front end of the trolley body. During the driving process of the trolley body, the bulldozing mechanism can quickly level the bottom of the trench, clean the obstacles or loose soil in the trench, reduce manual intervention, and improve the construction continuity and efficiency.

[0019] Furthermore, the counterweight assembly includes a counterweight base plate arranged inside the trolley body and counterweight blocks and counterweight boxes detachably installed on the counterweight base plate.

[0020] Through the above technical solution, the counterweight base plate is used to place the detachably installed counterweight blocks and counterweight boxes. Since the counterweight blocks are prefabricated bulk parts, they can be transported in bulk during transportation, reducing the transportation difficulty; on the other hand, the specific form of the counterweight blocks is not limited. For example, the counterweight blocks can be sandbags made on site, further saving costs.

[0021] Furthermore, the trolley body further includes a mud removal mechanism, which includes a first screw conveyor and a second screw conveyor. The screw blades of the first screw conveyor are arranged along the length direction of the bulldozing plate. The feeding end of the second screw conveyor is connected to the first screw conveyor through a port, and the discharging end is connected to the counterweight box.

[0022] Through the above technical solution, during the process of the trolley body moving forward, the soil in the bulldozing plate is conveyed into the second screw conveyor through the first screw conveyor. Then, the second screw conveyor conveys the soil into the counterweight box, linking the functions of the bulldozing plate and the mud removal mechanism, and conveying the cleaned soil into the counterweight box for recycling. This not only quickly levels the bottom of the trench, but also optimizes the counterweight resources and improves the overall stability of the support device.

[0023] Furthermore, the connecting arms are arranged on both sides of the bottom of the trolley body. Guide rail chutes are arranged on one side of the bulldozing plate close to the connecting arms. Guide rail chutes are arranged along the length direction of the bulldozing plate on one side of the bulldozing plate close to the connecting arms. The end of the connecting arm far from the trolley body is slidably connected to the guide rail chute.

[0024] Through the above technical solution, since the connecting arm is slidably connected to the guide rail chute of the bulldozing plate, when the trolley body adjusts its width according to the trench size, the widths of the two connecting arms can be adjusted adaptively accordingly, that is, they extend or shorten along with the width of the trolley, which is very convenient.

[0025] In summary, the present application at least includes the following beneficial technical effects: (1) The trench support device can be transported to a specific position of the trench through the traveling device. The trolley body and the support steel plates on both sides realize the support. The assembly is convenient, which speeds up the installation progress of the support system, reduces the work of personnel cooperation, and improves the safety performance of the installation.

[0026] (2) The trench support device utilizes the retractable adjustment performance of the first size adjustment mechanism and the second size adjustment mechanism, so that the width and height of the trolley body can be adjusted to adapt to various sizes of the trench, increasing the reuse rate of the trolley.

[0027] (3) The first size adjustment mechanism and the second size adjustment mechanism of the trench support device respectively adopt hydraulic adjustment mechanisms, and the telescopic process is more stable and controllable, adapting to the dynamic adjustment requirements under complex working conditions, improving the adjustment efficiency and the stability of the support structure, and having extremely high safety performance.

[0028] (4) The counterweight of the trench support device is a detachable accessory, which can be transported in bulk during transportation, reducing the transportation difficulty, and can also be configured on-site, which is very convenient.

[0029] (5) Electromagnetic adsorption devices are provided on both sides of the trench support device. After the electromagnetic adsorption devices are powered on, the trolley body is firmly connected to the support steel plate through the magnetic adsorption effect of the electromagnetic adsorption devices, thereby realizing the support function of the support device. After power-off, it can be quickly separated from the support steel plate, which is very convenient.

[0030] (6) The trench support device cooperates with the earth-pushing mechanism and the mud-removing mechanism to convey the cleaned soil to the counterweight box for recycling, which not only quickly levels the bottom of the trench, but also optimizes the counterweight resources and improves the overall stability of the support device. Brief Description of the Drawings

[0031] Figure 1 is the installation schematic diagram of the trench support device provided in Embodiment 1 of the present invention; Figure 2 is the structural schematic diagram of the support trolley of the trench support device provided in Embodiment 1 of the present invention; Figure 3 is the structural schematic diagram of the installation bracket of the trench support device provided in Embodiment 1 of the present invention; Figure 4 is the first structural schematic diagram of the trench support device provided in Embodiment 2 of the present invention; Figure 5 is the structural schematic diagram of the earth-pushing mechanism of the trench support device provided in Embodiment 2 of the present invention; Figure 6 is the enlarged view of the structure of Part A of the earth-pushing mechanism of the trench support device provided in Embodiment 2 of the present invention; Figure 7 is the structural schematic diagram of the connecting arm of the earth-pushing mechanism of the trench support device provided in Embodiment 2 of the present invention; Figure 8 is the second structural schematic diagram of the trench support device provided in Embodiment 2 of the present invention.

[0032] Description of the Reference Numerals: 1. Support steel plate; 2. Support trolley; 3. Earth-pushing mechanism; 4. Mud-removing mechanism; 21. Trolley body; 22. Counterweight assembly; 23. Traveling device; 24. Auxiliary support; 25. Horizontal judgment component; 31. Connecting arm; 32. Earth-pushing plate; 33. Installation baffle; 41. First screw conveyor; 42. Second screw conveyor; 211. First size adjustment mechanism; 212. Second size adjustment mechanism; 213. Hydraulic drive; 214. Installation bracket; 221. Counterweight base plate; 222. Counterweight block; 223. Counterweight box; 311. T-shaped structure; 331. Port; 411. First motor; 412. First screw rod; 413. First screw blade; 421. Second motor; 2141. Connecting rod; 2142. First installation rod; 2143. Second installation rod. Detailed Embodiment

[0033] The following will further describe this application in conjunction with the attached Figure 1-8 drawings.

[0034] Embodiment 1 Embodiment 1 discloses a trench support device. Referring to Figure 1-2 , it includes two relatively arranged support steel plates 1. A support trolley 2 is arranged between the two support steel plates 1. The support trolley 2 includes a trolley body 21, a counterweight assembly 22 arranged inside the trolley body 21, a traveling device 23 arranged at the bottom of the trolley body 21, and an auxiliary support assembly arranged on the trolley body 21 for detachably connecting with the support steel plate 1. Among them, the trolley body 21 further includes a first size adjustment mechanism 211 and a second size adjustment mechanism 212. The first size adjustment mechanism 211 is used to adjust the telescopic movement of the trolley body 21 in the trench width direction, and the second size adjustment mechanism 212 is used to adjust the telescopic movement of the trolley body 21 in the trench height direction.

[0035] The trolley body 21 can adjust the width and height of the trolley body according to the width and height of the trench through the first size adjustment mechanism 211 and the second size adjustment mechanism 212, so as to meet the trench support requirements of different specifications and sizes. Thus, the trolley body 21 is fixedly connected with the support steel plate 1 to achieve support, increasing the reuse rate of the trolley. On the other hand, the setting of the counterweight assembly 22 and the auxiliary support assembly improves the support stability of the support device. The setting of the traveling device 23 enables the autonomous movement of the trolley body 21, reducing the cost of manual handling, improving the safety performance, and accelerating the installation progress of the support device.

[0036] Further, the first size adjustment mechanism 211 and the second size adjustment mechanism 212 respectively adopt hydraulic adjustment mechanisms. The hydraulic adjustment mechanism includes a hydraulic telescopic member and a hydraulic driving member 213. The hydraulic driving member 213 drives the hydraulic telescopic member to expand and contract in a straight line direction, and adjusts the width and height of the trolley body 21 according to the actual size of the trench, making the support effect more stable.

[0037] Specifically, referring to Figure 3, in this embodiment, the trolley body 21 further includes four groups of mounting brackets 214 connected to the hydraulic telescopic members. The mounting bracket 214 includes a connecting rod 2141 and mounting components provided on both sides of the connecting rod 2141. The mounting components include a first mounting rod 2142 and a second mounting rod 2143 which are vertically designed. The connecting rod 2141, the first mounting rod 2142, and the second mounting rod 2143 are perpendicular to each other in pairs. Among them, the four groups of mounting brackets 214 are symmetrically arranged in pairs. There are four first size adjustment mechanisms 211 and four second size adjustment mechanisms 212 respectively. The hydraulic telescopic member of the first size adjustment mechanism 211 is installed between two relatively arranged first mounting rods 2142, and the hydraulic telescopic member of the second size adjustment mechanism 212 is installed between two relatively arranged second mounting rods 2143. The four groups of mounting brackets 214, the hydraulic telescopic members of the four first size adjustment mechanisms 211, and the hydraulic telescopic members of the four second size adjustment mechanisms 212 are connected to form a cuboid frame structure. That is, the hydraulic telescopic members of the first size adjustment mechanism are horizontally arranged along the width direction of the groove, and the hydraulic telescopic members of the second size adjustment mechanism are vertically arranged perpendicular to each other, so as to realize the extension adjustment of the trolley body 21 along the width direction and height direction of the groove. The cuboid frame structure conforms to the principles of engineering mechanics, improving the overall stiffness and stability of the trolley body.

[0038] As an alternative implementation, the hydraulic telescopic member is a hydraulic jack, and the hydraulic driving member 213 is a hydraulic pump station and a control box. The control box drives the hydraulic jack to expand and contract by controlling the hydraulic pump station. The hydraulic jack is more stable and controllable during the expansion and contraction process compared with the traditional pneumatic jack, adapting to the dynamic adjustment requirements under complex working conditions and improving the adjustment efficiency and the stability of the support structure.

[0039] Furthermore, the auxiliary support assembly can be set in one group or two groups. When the auxiliary support assembly is set in two groups, the two groups of auxiliary support assemblies are respectively arranged on the opposite sides of the trolley body 21. Among them, when only one group of auxiliary support assemblies is provided, it is generally applied to the single-side support of the groove. When two groups of auxiliary support assemblies are provided, it can not only be applied to single-side support, but also to double-side support. Therefore, it is preferable to set the auxiliary support assembly in two groups.

[0040] Among them, the auxiliary support assembly includes at least two auxiliary support members 24. The auxiliary support members 24 are respectively arranged near the top and bottom of the trolley body 21. The trolley body 21 is connected to the support steel plate 1 by the auxiliary support members 24 at the upper and lower ends, which is beneficial to providing more stable support.

[0041] Specifically, in this embodiment, the auxiliary support assembly includes four auxiliary support members 24. The auxiliary support members 24 are respectively arranged at the four corners on one side of the trolley body 21. The trolley body 21 uses the auxiliary support members 24 at the four corners to realize the support function with the support steel plate 1, and the stability is further improved.

[0042] Furthermore, the auxiliary support member includes an auxiliary support leg 241 and an electromagnetic adsorption device 242 provided at the end of the auxiliary support leg 241. The trolley body 21 is fixedly connected to the surface of the support steel plate 1 by adsorption through the electromagnetic adsorption device 242.

[0043] Wherein, the auxiliary support leg 241 is also internally provided with a hydraulic telescopic member for controlling the electromagnetic adsorption device 242 to expand and contract along the width direction of the groove.

[0044] As an optional implementation manner, the electromagnetic adsorption device 242 is an electro-strong magnetic plate, which generates magnetism after being energized and can quickly achieve a firm connection with the support steel plate 1 through adsorption. After power-off, it can quickly separate from the support steel plate 1, and the operation is very convenient.

[0045] Furthermore, the trolley body is also provided with at least one horizontal judgment component 25, and the horizontal judgment component 25 is arranged on the top of the trolley body 21. In this embodiment, two horizontal judgment components 25 are arranged, which are relatively arranged at the front and rear ends of the top of the trolley body 21 for judging whether the trolley body 21 is in a horizontal state.

[0046] Specifically, in this embodiment, the horizontal judgment component 25 is a level. Since the inclination of the bottom of the groove will cause uneven force on the support trolley, local stress concentration, which is likely to cause deformation or slippage. At the same time, the inclination may make the contact between the support trolley and the support steel plate or the bottom of the groove not dense, reducing the friction force and the support effect, and ultimately increasing the risk of collapse. The level judges the horizontal state of the support trolley and makes local adjustments to avoid the support failure caused by the inclination of the bottom of the groove, improving the construction accuracy and safety reliability.

[0047] Furthermore, the traveling device 23 includes at least one crawler device. The crawler device includes a traveling crawler and a driving wheel and a guiding wheel that cooperate with it, and can control the forward and backward movement of the trolley body 21. The trolley body 21 is transported to a specific position of the groove through the crawler device, which can accelerate the installation progress of the support system and reduce the cooperation work of personnel.

[0048] Embodiment 2 The difference between Embodiment 2 and Embodiment 1 is that, as Figure 4-5 shown, a bulldozing mechanism 3 is provided at the front end of the trolley body 21. The bulldozing mechanism 3 includes a connecting arm 31 and a bulldozing plate 32. One end of the connecting arm 31 is connected to the trolley body 21, and the other end is connected to the bulldozing plate 32. During the driving process of the trolley body 21, the bulldozing plate 32 can quickly level the bottom of the groove, clean the obstacles or loose soil in the groove, reduce manual intervention, and improve the construction continuity and efficiency.

[0049] Furthermore, referring to Figure 6-7, There are two sets of connecting arms 31, which are respectively arranged at both ends of the bottom of the front end of the trolley body 21. One end of the earth-pushing plate 32 close to the connecting arm 31 is provided with a guide rail chute 321. The guide rail chute 321 is a T-shaped groove. One end of the connecting arm 31 close to the guide rail chute 321 is a T-shaped structure 311. The structure of the T-shaped structure 311 is adapted to the structure of the T-shaped groove. One end of the connecting arm 31 is connected to the trolley body 21, and the other end is slidably connected to the guide rail chute 321. Since the connecting arm 31 is slidably connected to the guide rail chute 321 of the earth-pushing plate 32, when the trolley body 21 adjusts its width according to the groove size, the widths of the two connecting arms 31 can be adjusted adaptively, that is, they can expand and contract as the width of the trolley body expands and contracts.

[0050] Furthermore, the counterweight assembly 22 includes a counterweight base plate 221 arranged in the trolley body 21, and counterweight blocks 222 and counterweight boxes 223 detachably installed on the counterweight base plate 221. It can be understood that the counterweight blocks 222 are prefabricated bulk parts, which can be transported in bulk during transportation to reduce the transportation difficulty. On the other hand, the specific form of the counterweight blocks 222 is not limited. For example, the counterweight blocks 222 can be sandbags made on site and placed on the counterweight base plate to further save costs.

[0051] Further combined with Figure 4 and Figure 8 , the trolley body 21 further includes a mud removal mechanism 4. The mud removal mechanism 4 includes a first screw conveyor 41 and a second screw conveyor 42. The first screw conveyor 41 includes a first motor 411, a first screw rod 412 and a first screw blade 413. The second screw conveyor 42 also includes a second motor 421, a second screw rod and a second screw blade. Installation baffles 33 are arranged on opposite sides of the earth-pushing plate 32. The first screw rod 412 and the first screw blade 413 of the first screw conveyor 41 are arranged along the length direction of the earth-pushing plate. The first motor 411 is arranged on one side of the installation baffle 33. A port 331 is arranged on the installation baffle 33 on the side far from the first motor 411. The feeding end of the second screw conveyor 42 is connected to the first screw conveyor 41 through the port 331, and the discharging end is connected to the counterweight box 223.

[0052] When the mud removal mechanism 4 is started, the first motor 411 of the first screw conveyor drives the first screw rod 412 to rotate, and the screw blade 443 welded on the shaft rotates accordingly, forming a thrust on the sand and soil in the earth-pushing plate 32. The sand and soil are transported to the second screw conveyor 42 through the port 331. The second motor 421 drives the second screw rod to rotate, and the second screw blade welded on the shaft rotates accordingly, transporting the sand and soil to the counterweight box 223 connected to the second screw conveyor 42. It effectively links the functions of the earth-pushing plate 32 and the mud removal mechanism 4, transports the cleaned soil to the counterweight box 223 for recycling, not only quickly levels the bottom of the groove, but also optimizes the counterweight resources and improves the overall stability of the support device.

[0053] It should be noted that in addition to jointly transporting soil through the first screw conveyor 41 and the second screw conveyor 42 to increase the weight, the counterweight box 223 itself has a certain weight to ensure the balance and stability of the support device itself, thereby achieving effective support.

[0054] Furthermore, this trench support device is additionally equipped with a hand-held remote control, which is communicatively connected to the control device inside the support trolley 2. The operator can control the adjustment of the height and width of the trolley body 21, the switch of the electromagnetic control device 242, and the forward or backward movement of the traveling device 23 of the support trolley 2 through the hand-held remote control.

[0055] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A trench support device, comprising two support steel plates arranged oppositely, characterized in that: A support trolley is arranged between the two support steel plates. The support trolley includes a trolley body, a traveling device arranged at the bottom of the trolley body, a counterweight assembly arranged inside the trolley body, and an auxiliary support assembly arranged on the trolley body for detachably connecting with the support steel plate. Among them, the trolley body further includes a first size adjustment mechanism and a second size adjustment mechanism. The first size adjustment mechanism is used to adjust the trolley body to expand and contract along the width direction of the groove, and the second size adjustment mechanism is used to adjust the trolley body to expand and contract along the height direction of the groove.

2. The trench support device according to claim 1, wherein: At least one horizontal judgment assembly is further arranged on the trolley body, and the horizontal judgment assembly is arranged at the top of the trolley body.

3. A trench support device according to claim 1, characterized in that: The first size adjustment mechanism and the second size adjustment mechanism respectively adopt hydraulic adjustment mechanisms. The hydraulic adjustment mechanism includes a hydraulic telescopic member and a hydraulic driving member, and the hydraulic driving member drives the hydraulic telescopic member to expand and contract in a straight line direction.

4. A trench support device according to claim 1, characterized in that: The auxiliary support assembly includes at least two auxiliary support members, and the two auxiliary support members are respectively arranged near the top and the bottom of the trolley body.

5. The trench support device according to claim 1, characterized in that: There are two groups of the auxiliary support assemblies, and the two groups of the auxiliary support assemblies are respectively arranged on the opposite sides of the trolley body.

6. A trench support device according to claim 4, characterized in that: The auxiliary support member includes an auxiliary support leg and an electromagnetic adsorption device arranged at the end of the auxiliary support leg. The trolley body is fixedly connected with the surface of the support steel plate through the electromagnetic adsorption device. Among them, a hydraulic telescopic member is arranged inside the auxiliary support leg, and the hydraulic telescopic member is used to control the electromagnetic adsorption device to expand and contract along the width direction of the groove.

7. A trench support device according to claim 1, characterized in that: A bulldozing mechanism is arranged at the front end of the trolley body. The bulldozing mechanism includes a connecting arm and a bulldozing plate. One end of the connecting arm is connected with the trolley body, and the other end is connected with the bulldozing plate.

8. A trench support device according to claim 7, characterized in that: The counterweight assembly includes a counterweight base plate arranged inside the trolley body, and counterweight blocks and counterweight boxes detachably installed on the counterweight base plate.

9. The trench support device according to claim 8, characterized in that: The trolley body further includes a mud removal mechanism. The mud removal mechanism includes a first screw conveyor and a second screw conveyor. The spiral blade of the first screw conveyor is arranged along the length direction of the bulldozing plate. The feeding end of the second screw conveyor is connected with the first screw conveyor through a port, and the discharging end is connected with the counterweight box.

10. A trench support device according to claim 7, characterized in that: The connecting arms are arranged on both sides of the bottom of the trolley body. A guide rail chute is arranged along the length direction of the bulldozing plate on one side of the bulldozing plate close to the connecting arm, and the end of the connecting arm far from the trolley body is slidably connected with the guide rail chute.

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