Walking distance limiting device for maintenance trolley

Abstract

The utility model discloses a walking distance limiting device used for a maintenance trolley, the walking distance limiting device is installed on the ground and can directly face a limiting sensor, the walking distance limiting device comprises a baffle, a transverse beam, a supporting column and a disc base, and a T-shaped sliding block is arranged on the back face of the baffle. The T-shaped sliding block is movably embedded into a T-shaped sliding groove formed in the front side face of the transverse beam, the back face of the T-shaped sliding groove is fixedly connected to a supporting column through a hoop, and the lower end of the supporting column is fixedly connected to a disc base. And by arranging the two sets of limiting sensors and the walking distance limiting devices, the maintenance trolley can carry out maintenance within a designated range, and manpower can be effectively saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction maintenance equipment, and in particular relates to a travel distance limiting device for a maintenance trolley. Background Art

[0002] During the secondary lining construction of the tunnel, formwork is required to pour concrete on the tunnel side walls and top arch surface. After pouring, the concrete in the tunnel needs to be cured. The conventional curing method uses a water pipe to spray on the workbench, which is time-consuming, labor-intensive and inefficient.

[0003] A mobile maintenance trolley as disclosed in Chinese patent application (2022230164547) is used, with spray pipes set on the front and rear sides of the top, and the trolley is used to move and spray. However, the secondary lining construction of the tunnel is carried out in sections and maintained in sections. The mobile spraying of the trolley requires manual operation to move the position, which wastes manpower. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a travel distance limiting device for a maintenance trolley.

[0005] The technical solution adopted by the utility model is a travel distance limit device for a maintenance trolley, the travel distance limit device is installed on the ground and can face the limit sensor, the travel distance limit device includes a baffle, a transverse beam, a support column and a disc base, a T-shaped slider is arranged on the back of the baffle, the T-shaped slider is movably embedded in a T-shaped slide groove arranged on the front side of the transverse beam, the back of the T-shaped slide groove is fixedly connected to the support column through a hoop, and the lower end of the support column is fixedly connected to the disc base.

[0006] Preferably, two limit sensors are used, which are respectively installed at the front and rear ends of the traveling gantry of the trolley near the bottom.

[0007] Preferably, rubber layers are provided on both sides of the T-shaped sliding block, and the elastic rubber layers are elastically attached to the side surfaces of the T-shaped sliding groove.

[0008] Preferably, a roller is installed at the bottom of the disc base.

[0009] Preferably, an iron shoe is provided on the bottom of the disc base facing the walking gantry.

[0010] Preferably, auxiliary rollers are provided on both sides of the baffle.

[0011] Compared with the prior art, the beneficial effect of the utility model is that by setting two groups of limit sensors and travel distance limit devices, the maintenance trolley can be allowed to perform maintenance within a specified range, which can effectively save manpower, because the secondary lining construction of the tunnel is carried out in sections and maintained in sections; the T-shaped slider and T-shaped slide groove structure are adopted to facilitate the lateral adjustment of the baffle. When grooves or unevenness are set on the side, but the sensor is located outside, it is necessary to adjust the lateral position for adaptive matching; the crossbeam and the support column are connected by a hoop, which is convenient for installation and height adjustment, and corresponding matching can be performed for the heights of different sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of a maintenance trolley for tunnel construction;

[0013] Figure 2 This is a schematic diagram of the front structure of a maintenance trolley for tunnel construction;

[0014] Figure 3 is a front view of the water storage structure;

[0015] Figure 4 This is a schematic diagram of the top view of the maintenance trolley used for tunnel construction;

[0016] Figure 5 This is a schematic diagram of the installation structure of the limiting wheel;

[0017] Figure 6 It is a structural schematic diagram of the travel distance limiting device;

[0018] Figure 7 It is a schematic diagram of the front view structure of the baffle. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with the accompanying drawings to facilitate better understanding by those skilled in the art.

[0020] Example 1

[0021] like Figure 1-7 As shown, a travel distance limit device for a maintenance trolley is shown. The travel distance limit device 16 is installed on the ground and can face the limit sensor 15. Two limit sensors 15 are used, which are respectively installed at the front and rear ends of the trolley's travel door frame 1 near the bottom.

[0022] The travel distance limiting device 16 includes a baffle 1601, a transverse beam 1602, a support column 1603 and a disc base 1604. A T-shaped slider 1605 is arranged on the back of the baffle 1601. The T-shaped slider 1605 is movably embedded in a T-shaped slide groove 1606 arranged on the front side of the transverse beam 1602. Rubber layers 1608 are arranged on both sides of the T-shaped slider 1605. The elastic rubber layer elastically fits on the side of the T-shaped slide groove 1606 to achieve clamping, and the baffle has better stability. The back of the T-shaped slide groove 1606 is fixedly connected to the support column 1603 by a clamp 1607, and the lower end of the support column 1603 is fixedly connected to the disc base 1604.

[0023] The installation of two sets of limit sensors 15 and travel distance limit devices 16 can enable the maintenance trolley to perform maintenance within the specified range, because the secondary lining construction of the tunnel is carried out in sections and maintained in sections; the T-shaped slider 1605 and T-shaped slide groove 1606 structure are adopted to facilitate the lateral adjustment of the baffle 1601. When the side is grooved or uneven, but the limit sensor 15 is located outside, it is necessary to adjust the lateral position for adaptive matching; the cross beam 1602 and the support column 1603 are connected by a hoop, which is convenient for installation and height adjustment, and corresponding matching can be performed for the heights of different sensors.

[0024] Furthermore, a roller 1609 is installed at the bottom of the disc base 1604 to facilitate movement. An iron shoe 1610 is provided at the bottom of the disc base 1604 toward the walking gantry. The iron shoe 1610 can brake the walking wheel of the electric mechanism to play a safety limiting role.

[0025] Or auxiliary rollers 1611 are set on both sides of the baffle 1601, which cannot be used at the same time as the iron shoe 1610. After the travel distance limit device falls down, the auxiliary rollers 1611 cooperate with the disc base 1604 to play an auxiliary rolling role to prevent the travel distance limit device from being crushed by the travel door frame.

[0026] Example 2

[0027] A maintenance trolley comprises a walking gantry 1, an electric walking mechanism 2 and an annular spray pipe 3. A plurality of spray heads 18 evenly spaced are arranged on the top of the annular spray pipe 3 toward the secondary lining arch surface of the tunnel. An electric walking mechanism 2 is installed at the bottom of the walking gantry 1. The annular spray pipe 3 is installed on the top of the walking gantry 1 and is consistent with the shape of the top arch surface of the tunnel 4. The annular spray pipe 3 is connected to a booster water pump 5 through a pipeline. The booster water pump 5 is connected to a water tank 6. The water tank 6 is installed near the bottom of the walking gantry 1. The annular spray pipe 3 is detachably fixedly connected to a plurality of cantilever frames 13. The plurality of cantilever frames 13 are connected to the top of the walking gantry 1. In order to improve the spraying range and effect, the spray head 18 adopts a mechanical rotating spray head, which can realize spraying in a larger range, with better spray coverage and uniformity. The spraying surfaces of two adjacent spray heads are staggered to avoid the situation where the blind spot causes the spraying to be inadequate.

[0028] Among them, the above-mentioned annular spray pipe 3 adopts a half-structure, and two water inlet pipes are connected at the two lower ends respectively. The two water inlet pipes are connected to two water tanks 6 respectively through two booster pumps 5. The two water tanks 6 are respectively arranged on both sides of the walking gantry 1. The half-structure can realize the rapid flow of water to the designated nozzles for rapid spraying, thereby improving the spraying effect. The two water tanks are arranged on both sides of the walking gantry, which lowers the center of gravity of the entire equipment, increases the walking stability of the walking mechanism, and facilitates the water adding operation.

[0029] In order to accurately detect the start and end time of maintenance, an infrared temperature sensor 7 is installed on the top of the neutral surface of the above-mentioned walking gantry 1. When the temperature detection reaches the set value, the electric walking mechanism is started to walk and the spray pipe is started to spray, thereby realizing precise control. The infrared temperature sensor installed on the top can monitor the top temperature in the tunnel in real time. Because according to the principle of hot air moving upward, the hot air in the tunnel will converge to the top of the inner side of the tunnel. The temperature obtained by the top temperature measurement is more convenient to accurately judge whether maintenance is needed.

[0030] In order to improve the stability of the walking gantry and facilitate the passage at the bottom, the walking gantry 1 includes two gantry frames 101 and longitudinal beams 102. The two gantry frames 101 are detachably fixedly connected by multiple longitudinal beams 102. Each gantry 101 includes two columns 103 and a crossbeam 104 detachably fixedly connected between the upper and middle parts of the two columns 103. The top ends of the two columns 103 are detachably fixedly connected to one end of two inclined beams 105, and the other ends of the two inclined beams 105 are detachably fixedly connected to a horizontal beam 106 to form an arch structure. Each inclined beam 105 is detachably fixedly connected to the top of the horizontal beam 104 through an auxiliary vertical beam 109 near the top, and the bottom of each horizontal beam 104 is detachably fixedly connected to the two columns 103 connected on both sides of the horizontal beam 104 through two eight-shaped diagonal braces 110. Two inclined step platforms 107 and a top horizontal platform 108 are detachably fixedly connected between the two arch structures. The two inclined step platforms 107 are respectively located between the two pairs of inclined beams 105, and the top horizontal platform 108 is located between the two horizontal beams 106. The two corresponding uprights 103 are detachably fixedly connected with two crossed reinforcing beams 111, and the two corresponding auxiliary vertical beams 109 between the two door frames 101 are detachably fixedly connected with two crossed pull rods 112. The pull rods 112 are adjustable in length, and both ends are hinged to the two auxiliary vertical beams 109 through adjustment devices. The adjustment device includes two buckles and a strip ring. The two buckles are spirally connected to the two ends of the strip ring in opposite directions, which can realize the adjustment of the pull rod length. The detachable structural connection mode of the walking door frame forms a modular structure, which is convenient for operation. It is easy to assemble, disassemble and transport, and is reused at different construction sites. The portal structure is convenient for bottom passage without affecting other construction operations. The addition of an arch structure makes it easier to approach the top arch of the tunnel, facilitate the arrangement of the top working platform for operations, and facilitate the arrangement of sprinkler pipes. The arch structures connect the sloped staircase and the top horizontal platform, which can also increase the strength and rigidity of the entire portal frame and increase stability. The addition of auxiliary vertical beams and diagonal braces, two crossed reinforcement beams and two crossed pull rods can all improve the stability of the entire walking frame and avoid shaking.

[0031] In order to prevent the walking gantry from going off track during walking, a row of limiting wheels 8 are respectively arranged at the upper left and upper right corners of the walking gantry 1. The limiting wheels 8 are rotatably connected to the wheel frame 805. The wheel frame 805 is detachably fixedly connected to the upper end of the inclined cantilever 801. The lower end of the inclined cantilever 801 is movably inserted into the upper end of the square tube 802 and locked with a locking screw 803. The inclined cantilever 801 is provided with a plurality of through holes for inserting the locking screws 803 at intervals along its length direction. The lower end of the square tube 802 is detachably fixedly connected to the side of the walking gantry 1. The inclination angle of the square tube 802 ensures that the wheel surface of the limiting wheel 8 can abut against the inner side surface of the tunnel 4. The upper end of the square tube 802 is The U-shaped clamp ring 804 is fixedly connected to the bottom of the operating platform 9 on the side of the walking gantry 1, and a limiting device of the limiting wheel is installed in the upper right corner to prevent the walking gantry from deviating during walking, causing the top of the gantry to collide with the inner wall of the tunnel and damage the inner wall structure of the tunnel. The limiting wheel structure has a small contact surface and sliding friction, which is convenient for walking limitation. The limiting wheel mounting frame with a telescopic structure is convenient for adjusting the extension length of the limiting wheel. The telescopic structure of the inner and outer square tube structures is convenient and quick to adjust, and the connection is stable and reliable. In addition, a U-shaped clamp is installed at the free end of the outer tube and connected to the bottom of the operating platform, so that the mounting frame of the limiting wheel and the operating platform are further connected into an integrated structure, which can further improve the supporting stability of the limiting wheel.

[0032] In order to improve the versatility of the walking gantry, multiple detachable operating platforms 9 are respectively provided on both outer sides of the walking gantry 1. A ladder 10 is detachably fixedly connected between two adjacent operating platforms 9 on the same side. The topmost operating platform 9 is located at the top of the column 103, and the bottommost operating platform 9 is provided with a detachable suspended ladder 11. The suspended ladder 11 is 20-40 cm above the ground. Removable guardrails 12 are provided on the inner side and front and rear sides of each operating platform 9, and the outer side of each operating platform 9 is close to the inner wall of the tunnel 4. Multiple operating platforms and ladders are provided, combined with the top platform and the step platform at the top, which can increase the functionality of the maintenance trolley, facilitate the second ultrasonic detection of the tunnel and the grinding of the inner wall of the tunnel, and also facilitate climbing to the top for the maintenance of the sprinkler pipe. The detachable structure is convenient for assembly and disassembly, so as to adapt to the on-site repeated use at different construction sites, and guardrails are provided to improve the safety of operation.

[0033] For the convenience of installation, the above-mentioned annular spray pipe 3 is detachably fixedly connected to multiple cantilever frames 13, and multiple cantilever frames 13 are detachably fixedly connected to the top guardrail 14. The top guardrail 14 is an arc-shaped structure, and two are used, which are fixedly connected to the front and rear sides of the top of the walking door frame 1. The top arc pipe 17 of the top guardrail 14 located on one side of the spray pipe 3 is an auxiliary spray pipe. The top arc pipe 17 is installed with a spray head. The top arc pipe 15 is connected to the booster water pump 5 in parallel with the spray pipe 3 through a three-way joint and a pipeline; install the detachable guardrail The guardrail is convenient for installation, disassembly and transportation, which improves operational safety. The spray pipe is directly cantilevered and installed on the guardrail to reduce installation costs. The auxiliary spray pipe serves as a spare spray pipe. When the spray pipe is damaged, the spare spray pipe is activated and reused after the spray pipe is repaired or replaced to avoid downtime and the inability to maintain the tunnel concrete in time. In addition, when the temperature is high in summer, two spray pipes are activated at the same time to improve the maintenance efficiency and effect (the spray heads are staggered for a better effect). In summer, when the temperature is high, the dripping water will evaporate quickly and have little impact.

[0034] In order to facilitate the installation of the water tank and lower the center of gravity of the walking gantry, the water tank 6 is a flat structure, and the bottom in the length direction is placed on the longitudinal beam 102 at the bottom of the walking gantry 1. Two angle irons 604 are arranged at both ends of the top surface of the water tank 6, and the angle irons 604 are fixedly connected to the columns 103 of the walking gantry 1 by bolts. A plurality of heating rods 601, a temperature sensor 602 and a plurality of buffer nets 602 are arranged in the water tank 6, and the temperature sensor 602 is arranged inside. A plurality of buffer nets 603 are arranged at intervals along the length direction of the water tank 6. The water tank is a flat structure, which is convenient for installation, occupies little additional space, and will not affect the passage of the bottom of the trolley; it is also convenient to install on the walking gantry. Because the water tank is heavy, it is placed at the bottom of the walking gantry to lower the center of gravity of the walking gantry and improve the stability of the walking gantry. Moreover, due to the low installation position, it is also convenient to install it on the gantry. The placement method is coordinated with the angle Iron fixed connection, better installation stability, adding a heating rod, can heat the water, for winter when the temperature is below 5 ℃ for maintenance, it is necessary to heat the water temperature to the set temperature value for maintenance, which is more conducive to improving the concrete maintenance quality of the inner wall of the tunnel, adding multiple buffer nets, during the walking process of the walking gantry, can form a buffer for the water contained inside during the walking process, to avoid excessive shaking of the water inside the water tank causing excessive inertia of the maintenance trolley, a water filling port 605 and a liquid level sensor 606 are provided on the top of the water tank 6, the water filling port 605 is hinged with a cover, which can facilitate water addition, the liquid level sensor is convenient for detecting the liquid level of the water in the water tank, when it is lower than the set value, an alarm reminder or prompt is given, the buffer net 603 is fixed on the rectangular frame, the two sides and the bottom of the rectangular frame are embedded in the grooves of the inner wall and the bottom of the water tank, easy to assemble and disassemble, and convenient to maintain.

[0035] The electric walking mechanism 2 includes a front row of powered walking wheels 201 and a rear row of powered walking wheels 202 installed at the front and rear of the bottom of the walking gantry 1. The front row of powered walking wheels 201 is equipped with a power motor 203 for driving its rotation. A wire take-up device 19 is installed on the walking gantry 1 for winding the cable.

[0036] Working principle: In the set tunnel maintenance section, when the maintenance trolley is not in use, the walking gantry moves to the starting position, the water tank is filled with water, and two travel distance limit devices are installed at two extreme positions in the set tunnel maintenance section. When the infrared temperature sensor detects that the temperature at the top of the tunnel reaches the set value, the spray pipe is controlled to spray water toward the inner wall of the tunnel, and the electric travel mechanism is controlled to drive the maintenance trolley to move back and forth according to the two extreme positions in the set tunnel maintenance section at the set speed. The infrared temperature sensor and the outdoor temperature are combined to determine whether the concrete on the inner wall of the tunnel meets the set maintenance requirements. If the set requirements are met, the maintenance trolley is controlled to the starting position, and the next round of maintenance repeats the maintenance operation process. If the temperature is lower than 5°C in winter, the heating rod is controlled to heat the water tank. When the temperature in the water tank reaches the set temperature range required for maintenance, the heating is stopped.

[0037] The above-described embodiments are only descriptions of the preferred implementation methods of the utility model, and are not intended to limit the scope of the utility model. Without departing from the design spirit and principles of the utility model, various modifications and improvements made by those skilled in the art to the technical solution of the utility model should fall within the scope of protection determined by the claims of the utility model.

Claims

1. A travel distance limiting device for a maintenance trolley, characterized in that: The travel distance limiting device (16) is installed on the ground and can face the limit sensor (15). The travel distance limiting device (16) comprises a baffle (1601), a transverse beam (1602), a support column (1603) and a disc base (1604). A T-shaped slider (1605) is arranged on the back of the baffle (1601). The T-shaped slider (1605) is movably embedded in a T-shaped slide groove (1606) arranged on the front side of the transverse beam (1602). The back of the T-shaped slide groove (1606) is fixedly connected to the support column (1603) through a hoop (1607). The lower end of the support column (1603) is fixedly connected to the disc base (1604).

2. A travel distance limiting device for a maintenance trolley according to claim 1, characterized in that: Two limit sensors (15) are used and are respectively installed at the front and rear ends of the traveling door frame (1) of the trolley near the bottom.

3. A travel distance limiting device for a maintenance trolley according to claim 1, characterized in that: Rubber layers (1608) are provided on both sides of the T-shaped sliding block (1605), and the rubber layers (1608) are elastically attached to the sides of the T-shaped sliding groove (1606).

4. A travel distance limiting device for a maintenance trolley according to claim 1, characterized in that: A roller (1609) is installed at the bottom of the disc base (1604).

5. The travel distance limiting device for a maintenance trolley according to claim 1, characterized in that: An iron shoe (1610) is provided on the bottom of the disc base (1604) facing the side of the walking gantry (1).

6. A travel distance limiting device for a maintenance trolley according to claim 1, characterized in that: Auxiliary rollers (1611) are arranged on both sides of the baffle (1601).

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