Walking lateral limiting device for maintenance trolley

Abstract

The walking lateral limiting device comprises a row of limiting wheels which are arranged on the upper left corner and the upper right corner of a walking door frame of the trolley respectively, the limiting wheels are connected to a wheel carrier in a rotating mode, and the wheel carrier is detachably and fixedly connected to the upper end of an inclined cantilever. The lower end of the inclined cantilever is movably inserted into the upper end of the square pipe and locked through a locking screw, the lower end of the square pipe is obliquely, detachably and fixedly connected to the side face of the walking door frame, and the inclined angle of the square pipe ensures that the wheel face of the limiting wheel can abut against the inner side face of the tunnel. Limiting devices with limiting wheels are additionally arranged at the upper left corner and the upper right corner of a trolley walking door frame, and the situation that the top of a walking door frame collides with the inner wall of a tunnel and the inner wall structure of the tunnel is damaged due to deviation of the walking door frame in the walking process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction maintenance equipment, and in particular relates to a walking lateral 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, and spray pipes are set on the front and rear sides of the top. The trolley is used to move and spray. However, there is a situation where the traveling gantry deviates during the movement of the trolley, causing the top of the gantry to collide with the inner wall of the tunnel, damaging the inner wall structure of the tunnel. Utility Model Content

[0004] The technical solution adopted by the utility model is a lateral travel limiting device for a maintenance trolley, comprising a row of limiting wheels respectively arranged at the upper left corner and the upper right corner of the trolley travel door frame, the limiting wheels are rotatably connected to the wheel frame, the wheel frame is detachably fixedly connected to the upper end of the inclined cantilever, the lower end of the inclined cantilever is movably inserted into the upper end of the square tube and locked with a locking screw, the lower end of the square tube is obliquely and detachably fixedly connected to the side of the travel door frame, and the inclination angle of the square tube ensures that the wheel surface of the limiting wheel can rest against the inner side of the tunnel.

[0005] Preferably, the inclined cantilever is provided with a plurality of through holes for inserting locking screws at intervals along its length direction.

[0006] Preferably, the upper end of the square tube is fixedly connected to the bottom of the operating platform on the side of the walking door frame through a U-shaped clamp ring.

[0007] Compared with the prior art, the beneficial effect of the utility model is that, by adding limiting devices of limiting wheels at the upper left and upper right corners of the trolley walking door frame, the walking door frame can be prevented from deviating during walking, causing the top of the door frame 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 adjustment of the inner and outer square tube structures is convenient and quick, and the connection is stable and reliable. Moreover, a U-shaped clamp is installed at the free end of the outer tube to be connected to the bottom of the operating platform, so as to further connect the limiting wheel mounting frame and the operating platform into an integrated structure, which can further improve the supporting stability of the limiting wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the three-dimensional structure of the maintenance trolley used for tunnel construction;

[0009] Figure 2 This is a schematic diagram of the front structure of a maintenance trolley for tunnel construction;

[0010] Figure 3 It is a schematic diagram of the side view structure of the maintenance trolley used for tunnel construction;

[0011] Figure 4 This is a schematic diagram of the top view of the maintenance trolley used for tunnel construction;

[0012] Figure 5 This is a schematic diagram of the installation structure of the limiting wheel;

[0013] Figure 6 It is a structural schematic diagram of the travel distance limiting device;

[0014] Figure 7 It is a schematic diagram of the front view structure of the baffle. DETAILED DESCRIPTION

[0015] The present invention will be further explained below in conjunction with the accompanying drawings to facilitate better understanding by those skilled in the art.

[0016] Example 1

[0017] like Figure 5 As shown, a lateral travel limiting device for a maintenance trolley comprises a row of limiting wheels 8 respectively arranged at the upper left and upper right corners of the trolley travel door frame 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 lower end of the square tube 802 is tilted and detachably fixedly connected to the side of the travel door frame 1, and the inclination angle of the square tube 802 ensures that the wheel surface of the limiting wheel 8 can abut against the inner side of the tunnel 4. By installing limiting devices of limiting wheels 8 at the upper left and upper right corners of the trolley travel door frame 1, the travel door frame is prevented from deviating during the travel process, causing the top of the door frame to collide with the inner wall of the tunnel and damage the inner wall structure of the tunnel; wherein, the limiting wheel 8 structure has a small contact surface and sliding friction, which is convenient for travel limiting.

[0018] Furthermore, the inclined cantilever 801 is provided with a plurality of through holes for inserting locking screws 803 at intervals along its length. The telescopic structure of the limiting wheel mounting frame facilitates the adjustment of the extension length of the limiting wheel 8, and the telescopic structure of the inner and outer square tubes makes the adjustment convenient and quick, and the connection is stable and reliable.

[0019] Furthermore, the upper end of the square tube 802 is fixedly connected to the bottom of the operating platform on the side of the walking door frame 1 through a U-shaped clamp ring 804. The free end of the outer tube is equipped with a U-shaped clamp 804 and connected to the bottom of the operating platform, further connecting the mounting frame of the limiting wheel 8 and the operating platform into an integrated structure, which can further improve the support stability of the limiting wheel 8.

[0020] Example 2

[0021] See also Figure 1-4 and Figure 6-7 A maintenance trolley comprises a walking door frame 1, an electric walking mechanism 2 and an annular spray pipe 3. A plurality of spray heads 18 arranged evenly at intervals 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 door frame 1. The annular spray pipe 3 is installed on the top of the walking door frame 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 door frame 1. The annular spray pipe 3 is detachably fixedly connected to multiple cantilever frames 13, and multiple cantilever frames 13 are connected to the top of the walking door frame 1. In order to improve the spraying range and effect, the spray head 18 adopts a mechanical rotating spray head, which can achieve 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 inadequate spraying.

[0022] 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 door frame 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 door frame, which lowers the center of gravity of the entire equipment, increases the walking stability of the walking mechanism, and facilitates the water adding operation.

[0023] 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 walking door frame 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 achieving precise control. An infrared temperature sensor is installed on the top to 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.

[0024] In order to improve the stability of the walking door frame and facilitate the passage at the bottom, the walking door frame 1 includes two door frames 101 and longitudinal beams 102. The two door frames 101 are detachably fixedly connected by multiple longitudinal beams 102. Each door frame 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, so as to adjust the length of the pull rod. 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.

[0025] In order to improve the versatility of the walking door frame, multiple detachable operating platforms 9 are respectively provided on both outer sides of the walking door frame 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. A detachable guardrail 12 is provided on the inner side and the 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, so as to 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 of different construction sites, and guardrails are provided to improve the safety of operation.

[0026] 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.

[0027] In order to facilitate the installation of the water tank and lower the center of gravity of the walking door frame, 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 door frame 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 door frame 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 door frame. Because the water tank is heavy, it is placed at the bottom of the walking door frame to lower the center of gravity of the walking door frame and improve the stability of the walking door frame. Moreover, due to the low installation position, it is also convenient to install it on the door frame. 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.

[0028] Because the secondary lining of the tunnel is cast in sections, in order to realize the fixed distance walking for section maintenance, the maintenance trolley for tunnel construction also includes a limit sensor 15 and a travel distance limit device 16. Two limit sensors 15 are respectively installed at the front and rear ends of the walking door frame 1 near the bottom. The travel distance limit device 16 is installed on the ground and can face the limit sensor 15. The travel distance limit device 16 includes a baffle 1601, a transverse beam 1602, a support column 1603 and a disc base 1604. The baffle 1 A T-shaped slider 1605 is arranged on the back of 601, and the T-shaped slider 1605 is movably embedded in the 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 through the hoop 1607. The lower end of the support column 1603 is fixedly connected to the disc base 1604. Two sets of The limit sensor and the travel distance limit device can allow 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-type slider and T-type slide groove structure are used to facilitate the lateral adjustment of the baffle. When the side is set with grooves or unevenness, but the sensor is located outside, the lateral position needs to be adjusted for adaptation and matching; the cross beam and the support column are connected by a hoop, which is convenient for installation and height adjustment. Corresponding matching can be performed for the heights of different sensors. A roller 1609 is installed at the bottom of the disc base 1604, and the roller is set to facilitate movement. An iron shoe 1610 is provided on the side of the bottom of the disc base 1604 facing the walking gantry. The iron shoe can brake the walking wheel of the electric mechanism to play a safety limiting role, or auxiliary rollers 1611 are provided on both sides of the baffle 1601, which cannot be used together with the iron shoe. After the travel distance limit device falls, the auxiliary roller cooperates with the disc base to play an auxiliary rolling role to prevent the walking gantry from crushing the travel distance limit device.

[0029] 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 door frame 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 door frame 1, and the wire take-up device 19 winds up the cable.

[0030] Working principle: In the set tunnel maintenance section, when the maintenance trolley is not in use, the walking door frame 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 walking 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.

[0031] The above-mentioned embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the scope of the utility model. Without departing from the design spirit and principle of the utility model, various modifications and improvements made by those skilled in the art to the technical solution of the utility model shall fall within the protection scope determined by the claims of the utility model.

Claims

1. A lateral travel limit device for a maintenance trolley, characterized in that: The invention comprises a row of limiting wheels (8) respectively arranged at the upper left corner and the upper right corner of a trolley travel door frame (1), wherein the limiting wheels (8) are rotatably connected to a wheel frame (805), and the wheel frame (805) is detachably fixedly connected to the upper end of an inclined cantilever (801), and the lower end of the inclined cantilever (801) is movably inserted into the upper end of a square tube (802) and locked by a locking screw (803), and the lower end of the square tube (802) is detachably fixedly connected to the side surface of the travel door frame (1), and 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).

2. A walking lateral limit device for a maintenance trolley according to claim 1, characterized in that: The inclined cantilever (801) is provided with a plurality of through holes for inserting locking screws (803) arranged at intervals along its length direction.

3. A walking lateral limit device for a maintenance trolley according to claim 1, characterized in that: The upper end of the square tube (802) is fixedly connected to the bottom of the operating platform on the side of the walking door frame (1) via a U-shaped clamp ring (804).

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