Lightweight tunnel grouting device

Abstract

The utility model discloses a light-weight tunnel grouting device which comprises a device shell, a stirring motor, a stirring shaft, a stirring shaft sleeve, a grout inlet tee joint, a grouting pump motor, a three-plunger grouting pump, a grout outlet, a temperature sensor and a heating rod. The stirring shaft is installed in the medium cavity through the stirring motor, the stirring shaft is sleeved with the stirring shaft sleeve in a sealing mode, the grouting pump motor and the three-plunger grouting pump are installed in the grouting chamber, and the grouting pump motor is connected with the three-plunger grouting pump; the slurry inlet tee joint is installed between the medium cavity and the grouting chamber, a feeding port of the slurry inlet tee joint is communicated with the bottom of the medium cavity, three discharging ports of the slurry inlet tee joint are communicated with three plunger pairs of the three-plunger grouting pump, and slurry outlets are embedded in the grouting chamber and connected with discharging ports of the three-plunger grouting pump. And the temperature sensor and the heating rod are arranged in the medium chamber. The utility model relates to the technical field of tunnel engineering, and can solve the problems that in the prior art, the grouting effect is poor, the size is large and heavy, and double-component slurry is not fully stirred.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a lightweight tunnel grouting device. Background Art

[0002] In subway shield tunnel structural renovation projects, after the inner steel rings are assembled, gaps of varying sizes inevitably exist between the rings and the segments. Therefore, epoxy resin must be filled between the rings and the segments to fill the gaps. Traditionally, grouting involves connecting a grouting nozzle to the injection hole and injecting rigid epoxy resin slurry from bottom to top until the resin overflows. Grouting pressure is generally less than 0.1 MPa.

[0003] Traditional grouting equipment is a screw grouting pump with complex pipelines, large volume, heavy mass, and inability to control the grouting pressure and grouting flow rate. Workers are usually required to make their own judgments based on experience, which often leads to insufficient grouting or inappropriate grouting pressure, affecting the grouting effect. On the other hand, due to the two-component material characteristics of rigid epoxy resin, the traditional form of manual stirring is usually unable to ensure sufficient stirring of the two-component material. Especially in low temperature environments, the two-component material is prone to condensation and aggregation, resulting in failure to grout normally. Therefore, it is necessary to provide a lightweight tunnel grouting device that can solve the problems of poor grouting effect, large volume and weight, and insufficient stirring of two-component slurry in the existing technology. Summary of the Invention

[0004] The purpose of the utility model is to provide a lightweight tunnel grouting device, which can solve the problems of poor grouting effect, large and heavy volume, and insufficient stirring of two-component slurry in the prior art.

[0005] The utility model is achieved in this way:

[0006] A lightweight tunnel grouting device comprises a device housing, a stirring motor, a stirring shaft, a stirring shaft sleeve, a slurry inlet tee, a grouting pump motor, a three-plunger grouting pump, a slurry outlet, a temperature sensor and a heating rod; a medium chamber, a main control chamber and a grouting chamber are formed in the device housing, and the medium chamber forms an opening at the top of the device housing; the stirring shaft is rotatably installed in the medium chamber through the stirring motor, and the stirring shaft sleeve is sealed and sleeved on the stirring shaft, so that the two-component material is fully stirred in the medium chamber through the stirring shaft; the grouting pump motor and the three-plunger grouting pump are sealed and sleeved. The plunger grouting pump is installed in the grouting chamber and electrically connected to the control equipment in the main control room. The grouting pump motor is connected to the three-plunger grouting pump; the slurry inlet tee is installed between the medium chamber and the grouting chamber, and the feed port of the slurry inlet tee is connected to the bottom of the medium chamber, the three discharge ports of the slurry inlet tee are connected to the three-way plunger pairs of the three-plunger grouting pump, the slurry outlet is embedded in the outer wall of the grouting chamber and connected to the discharge port of the three-plunger grouting pump; the temperature sensor and the heating rod are installed in the medium chamber and electrically connected to the control equipment in the main control room.

[0007] A bottom plate is provided in the medium chamber, which divides the medium chamber into a stirring chamber located above the bottom plate and a control chamber located below the bottom plate; the stirring chamber and the control chamber are independent of each other, the stirring motor is installed in the control chamber, and the stirring shaft and the stirring shaft sleeve are installed in the stirring chamber; the slurry inlet tee and the temperature sensor are respectively arranged below and above the bottom plate, and the heating rod is located next to the slurry inlet tee.

[0008] The stirring shaft includes a main shaft body, a first stirring blade and a second stirring blade; one end of the main shaft body is sealed and passes through the bottom plate and is coaxially fixed to the output shaft of the stirring motor, and the stirring shaft sleeve is sealed and sleeved on the stirring shaft; the first stirring blade and the second stirring blade are staggered up and down and sleeved on the stirring shaft sleeve.

[0009] The bottom plate is provided with an upwardly turned sleeve, which extends upwardly and is sleeved on the lower part of the stirring shaft. The lower part of the stirring shaft sleeve is rotatably sleeved on the upwardly turned sleeve, and the upper end of the stirring shaft sleeve extends to the top of the medium chamber.

[0010] The first stirring blade is composed of a plurality of fan-shaped stirring blades, and the second stirring blade is composed of a plurality of L-shaped stirring blades. The second stirring blade is arranged higher than the first stirring blade.

[0011] A liquid level sensor is provided in the medium chamber, and the liquid level sensor and the first stirring blade are located at the same height.

[0012] The three-plunger grouting pump is provided with a pressure sensor, which is electrically connected to the control equipment in the main control room.

[0013] The main control room is located beside the stirring chamber. A handle is provided on the top of the main control room, and handles are provided on both sides of the outer wall of the device shell.

[0014] Shock-absorbing pads are respectively provided at the bottom corners of the device shell.

[0015] The top of the master control room is embedded with buttons and a display screen, which are electrically connected to the control equipment in the master control room.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The utility model is provided with a device shell consisting of a medium chamber, a main control room and a grouting chamber. The control equipment in the main control room is used to control the stirring and grouting actions, so that the two-component material is fully stirred and evenly mixed in the stirring chamber through double stirring up and down, and the three-plunger grouting pump is controlled by the grouting pump motor to realize quantitative grouting through the slurry outlet, thereby ensuring the grouting effect while making the entire device integrated, miniaturized and lightweight, and can be conveniently transported and carried by the handle.

[0018] 2. Since the utility model is provided with a liquid level sensor, a pressure sensor and a temperature sensor, the liquid level sensor can be used to monitor the remaining amount of the two-component material in the stirring chamber in real time, which is conducive to realizing the alarm function in combination with the alarm device. The pressure sensor can monitor the pumping pressure of the three-plunger grouting pump in real time, which is conducive to ensuring the quantitative pumping and quantitative grouting of the three-plunger grouting pump and avoiding excessive or insufficient grouting. The temperature sensor can monitor the temperature of the two-component material in the stirring chamber in real time, thereby facilitating the heating of the two-component material by the heating rod in a low temperature environment to ensure the stirring and mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the lightweight tunnel grouting device of the utility model;

[0020] Figure 2 This is a three-dimensional diagram of the lightweight tunnel grouting device of the utility model;

[0021] Figure 3 It is a top view of the lightweight tunnel grouting device of the utility model.

[0022] In the figure, 1 is the device housing, 101 is the medium chamber, 102 is the main control room, 103 is the grouting room, 104 is the bottom plate, 105 is the upward sleeve, 106 is the liquid level sensor, 107 is the pressure sensor, 108 is the handle, 109 is the shock-absorbing pad, 110 is the button, 111 is the display screen, 2 is the stirring motor, 3 is the stirring shaft, 301 is the main shaft body, 302 is the first stirring blade, 303 is the second stirring blade, 4 is the stirring shaft sleeve, 5 is the slurry inlet tee, 6 is the grouting pump motor, 7 is the three-plunger grouting pump, 8 is the slurry outlet, 9 is the temperature sensor, and 10 is the heating rod. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Please see the attached Figure 1 To the attached Figure 3A lightweight tunnel grouting device includes a device housing 1, a stirring motor 2, a stirring shaft 3, a stirring shaft sleeve 4, a slurry inlet tee 5, a grouting pump motor 6, a three-plunger grouting pump 7, a slurry outlet 8, a temperature sensor 9 and a heating rod 10; a medium chamber 101, a main control room 102 and a grouting chamber 103 are formed in the device housing 1, and the medium chamber 101 forms an opening at the top of the device housing 1; the stirring shaft 3 is rotatably installed in the medium chamber 101 through the stirring motor 2, and the stirring shaft sleeve 4 is sealed and sleeved on the stirring shaft 3, so that the two-component material is fully stirred in the medium chamber 101 through the stirring shaft 3; the grouting pump motor 6 and The three-plunger grouting pump 7 is installed in the grouting chamber 103 and is electrically connected to the control equipment in the main control room 102, and the grouting pump motor 6 is connected to the three-plunger grouting pump 7; the slurry inlet tee 5 is installed between the medium chamber 101 and the grouting chamber 103, and the feed port of the slurry inlet tee 5 is connected to the bottom of the medium chamber 101, and the three discharge ports of the slurry inlet tee 5 are connected to the three-way plunger pairs of the three-plunger grouting pump 7, and the slurry outlet 8 is embedded in the outer wall of the grouting chamber 103 and is connected to the discharge port of the three-plunger grouting pump 7; the temperature sensor 9 and the heating rod 10 are installed in the medium chamber 101 and are electrically connected to the control equipment in the main control room 102.

[0025] By using a miniaturized device housing 1 (e.g., with a size of 589*260*676 mm), a small amount of two-component material can be stirred to meet the small amount of grouting filling requirements between the inner tension steel ring and the pipe segment.

[0026] Because filling the gap between the inner steel ring and the segment requires high slurry properties, the two-component material is thoroughly stirred and mixed by the stirring shaft 3 driven by the stirring motor 2. Simultaneously, the two-component material is heated at low temperatures by a heating rod 10, and the heating temperature is monitored by a temperature sensor 9. This helps improve the mixing uniformity and fluidity of the two-component material, ensuring that it meets the requirements of grouting. The heating rod 10 can be a conventional electric heating rod and can be selected based on the heating temperature range.

[0027] After the two-component material is fully stirred, the epoxy resin formed is divided into three paths through the slurry inlet tee 5 and enters the three-way plunger pair of the three-plunger grouting pump 7. Then, it is mixed and collected in the three-plunger grouting pump 7 and output through the slurry outlet 8. The three-way plunger pair of the three-plunger grouting pump 7 is driven by the grouting pump motor 6 to move at a uniform speed, which will ensure that the pumping volume of each grouting is consistent and controllable, thereby meeting the grouting requirements and avoiding excessive grouting and waste of slurry or insufficient grouting and affecting the grouting effect.

[0028] Please see the attached Figure 1The medium chamber 101 is provided with a bottom plate 104, which divides the medium chamber 101 into a stirring chamber located above the bottom plate 104 and a control chamber located below the bottom plate 104; the stirring chamber and the control chamber are independent of each other, the stirring motor 2 is installed in the control chamber, and the stirring shaft 3 and the stirring shaft sleeve 4 are installed in the stirring chamber; the slurry inlet tee 5 and the temperature sensor 9 are respectively arranged below and above the bottom plate 104, and the heating rod 10 is located next to the slurry inlet tee 5; the temperature sensor 9 is installed on the side wall of the medium chamber 101 and slightly higher than the feed port of the slurry inlet tee 5.

[0029] The bottom plate 104 is sealed against the inner wall of the medium chamber 101, ensuring the independence of the stirring chamber and the control chamber, thereby ensuring the normal operation of the stirring motor 2. The stirring shaft sleeve 4 is sleeved on the stirring shaft 3 to isolate the slurry from the stirring shaft 3. The connection nodes of the stirring shaft sleeve 4, the stirring shaft 3, the output shaft of the stirring motor 2, and the bottom plate 104 are highly sealed.

[0030] Please see the attached Figure 1 The stirring shaft 3 includes a main shaft body 301, a first stirring blade 302 and a second stirring blade 303; one end of the main shaft body 301 is sealed through a sealing ring and passes through the bottom plate 104 and is coaxially fixed to the output shaft of the stirring motor 2, and the stirring shaft sleeve 4 is sealed and sleeved on the stirring shaft 3; the first stirring blade 302 and the second stirring blade 303 are staggered up and down and sleeved on the stirring shaft sleeve 4.

[0031] The main shaft 301 is configured to rotate at a predetermined speed under the action of the stirring motor 2, thereby driving the stirring sleeve 4, the first stirring blade 302, and the second stirring blade 303 to rotate synchronously, thereby achieving the purpose of fully stirring and mixing the two-component materials. The power of the stirring motor 2 can be adaptively selected according to the actual stirring requirements.

[0032] The first stirring blade 302 and the second stirring blade 303 are staggered up and down to provide double stirring for the two-component material, thereby ensuring that the two-component material is fully stirred and evenly mixed.

[0033] Please see the attached Figure 1 The bottom plate 104 is formed with an upward-turned sleeve 105, which extends upward and is sleeved on the lower part of the stirring shaft 3. The lower part of the stirring shaft sleeve 4 is rotatably sleeved on the upward-turned sleeve 105, and the upper end of the stirring shaft sleeve 4 extends to the top of the medium chamber 101.

[0034] The upward-turned sleeve 105 can be integrally formed with the bottom plate 104. The inner diameter of the upward-turned sleeve 105 matches the stirring shaft 3, and the outer diameter of the upward-turned sleeve 104 matches the inner diameter of the stirring shaft sleeve 4, so that the stirring shaft 3 can pass through the bottom plate 104 through the upward-turned sleeve 105. The stirring shaft sleeve 4 is sleeved on the upward-turned sleeve 105, which can improve the sealing and wrapping effect of the stirring shaft sleeve 4 on the stirring shaft 3 by extending the flow path of the slurry.

[0035] Please see the attached Figure 1 The first stirring blade 302 is composed of a plurality of fan-shaped stirring blades, and the second stirring blade 303 is composed of a plurality of L-shaped stirring blades. The second stirring blade 303 is set higher than the first stirring blade 302.

[0036] Preferably, three fan-shaped stirring blades can be arranged at equal intervals, and three L-shaped stirring blades can be arranged at equal intervals. The number of stirring blades can also be adaptively adjusted according to actual stirring needs to ensure sufficient stirring.

[0037] Please see the attached Figure 1 A liquid level sensor 106 is provided in the medium chamber 101 , and the liquid level sensor 106 and the first stirring blade 302 are located at approximately the same height.

[0038] Preferably, the liquid level sensor 106 can be a static pressure sensor to detect the remaining amount of the two-component material in the mixing chamber to prevent the grouting pump motor 6 from being damaged by idling. Preferably, the liquid level sensor 106 can be located at the height of the first mixing blade 302, and an external alarm can be connected through the control device. When the two-component material is almost used up, the control device can activate the alarm to facilitate timely replenishment of the two-component material.

[0039] Please see the attached Figure 1 The three-plunger grouting pump 7 is provided with a pressure sensor 107 , and the pressure sensor 107 is electrically connected to the control equipment in the main control room 102 .

[0040] The pressure sensor 107 is used to detect the pressure in the three-plunger grouting pump 7 to ensure the operational safety of the three-plunger grouting pump 7. It is also beneficial to control the pumping volume of the three-plunger grouting pump 7 to meet the requirements of accurate grouting. The grouting flow rate is controlled in real time according to the grouting pressure to achieve low pressure and high flow, high pressure and low flow, and overpressure shutdown. Preferably, the pressure sensor 107 can be installed at the connection between the three-way plunger pair of the three-plunger grouting pump 7 and the slurry inlet tee 5.

[0041] Please see the attached Figure 1 The main control room 102 is located next to the stirring chamber. A handle 108 is provided on the top of the main control room 102, and handles 108 are provided on the outer walls of both sides of the device housing 1.

[0042] The handles 108 on the top and both sides make it easy to carry the entire device, making it convenient to transport and store.

[0043] Please see the attached Figure 1 Shock-absorbing pads 109 are respectively provided at the bottom corners of the device housing 1.

[0044] Preferably, the shock-absorbing feet 109 can be made of rubber material, which has good anti-slip, wear-resistant and shock-absorbing properties, and can reduce vibration and improve stability when the entire device is running.

[0045] Please see the attached Figure 1 The top of the master control room 103 is embedded with buttons 110 and a display screen 111 , which are electrically connected to the control equipment in the master control room 103 .

[0046] Preferably, the switches and control buttons of the stirring motor 2, the grouting pump motor 6 and the heating rod 10 can be integrated into the top of the main control room 103 to form buttons 110, which are convenient for manual operation of the stirring motor 2, the grouting pump motor 6 and the heating rod 10. The display screen 111 can be a liquid crystal screen for displaying the temperature, pressure, liquid level data information received by the control device, the switch operation status of the stirring motor 2, the grouting pump motor 6 and the heating rod 10, etc.

[0047] Please see the attached Figure 1 To the attached Figure 3 , the working process and working principle of the utility model are:

[0048] Since the gap between the inner tension steel ring and the pipe segment is small and the epoxy resin filling amount is small, the size of the device shell 1 is 589*260*676mm, and the right half of the space in the device shell 1 is used as the medium chamber 101. The bottom plate 104 is installed at the lower part of the medium chamber 101. The height of the bottom plate 104 is installed according to the installation space requirements of the stirring motor 2, the slurry inlet tee 5 and the heating rod 10 below, with a low center of gravity and high stability.

[0049] The upper left half of the device housing 1 serves as the main control room 102, and the lower half serves as the grouting room 103. A PC or a PLC device can be installed in the main control room 102 as a control device for receiving detection data from the liquid level sensor 106, the pressure sensor 107, and the temperature sensor 9, and controlling the start, stop, and operating power of the stirring motor 2, the grouting pump motor 6, and the heating rod 10. The grouting pump motor 6 and the three-plunger grouting pump 7 are installed in the grouting room 103.

[0050] During construction, the two-component material of epoxy resin is added into the stirring chamber, and the stirring motor 2 is controlled by the control device to run at a certain speed, and drives the stirring shaft 3 and the stirring shaft sleeve 4 to rotate synchronously, so that the first stirring blade 302 and the second stirring blade 303 rotate synchronously, and the two-component material is fully stirred and mixed by the first stirring blade 302 and the second stirring blade 303 arranged up and down.

[0051] If the ambient temperature is low, it will affect the fluidity of the two-component material. Temperature sensor 9 monitors the material temperature in the mixing chamber and sends the monitoring data to the control device. The control device has a preset heating temperature value. If the monitoring data of temperature sensor 9 is lower than the heating temperature value, the control device controls heating rod 10 to heat the two-component material, raising the temperature of the two-component material and ensuring the mixing uniformity and fluidity of the two-component material. If the monitoring data of temperature sensor 9 reaches the heating temperature value, the control device turns off heating rod 10.

[0052] The grouting pump motor 6 is started by the control device to drive the three-plunger grouting pump 7 to start. The two-component material after being fully stirred and heated enters through the feed port of the slurry inlet tee 5, and is injected into the three-way plunger pairs of the three-plunger grouting pump 7 through the three discharge ports. The mixed epoxy resin is quantitatively injected into the grouting nozzle through the slurry outlet 8 by means of the movement of the plunger, thereby filling the gap between the inner steel ring and the pipe segment.

[0053] As the grouting progresses, the two-component material in the stirring chamber decreases. When the liquid level drops below the liquid level sensor 106, the liquid level sensor 106 cannot collect the liquid level height, and the control device controls the stirring motor 2, the grouting pump motor 6 and the heating rod 10 to turn off.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent replacements, 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 lightweight tunnel grouting device, characterized by: The invention comprises a device housing (1), a stirring motor (2), a stirring shaft (3), a stirring shaft sleeve (4), a slurry inlet tee (5), a grouting pump motor (6), a three-plunger grouting pump (7), a slurry outlet (8), a temperature sensor (9) and a heating rod (10); a medium chamber (101), a main control room (102) and a grouting chamber (103) are formed in the device housing (1); the medium chamber (101) is opened at the top of the device housing (1); the stirring shaft (3) is rotatably installed in the medium chamber (101) through the stirring motor (2); the stirring shaft sleeve (4) is sealed and sleeved on the stirring shaft (3), so that the two-component material is fully stirred in the medium chamber (101) through the stirring shaft (3); the grouting pump motor (6) and the three-plunger grouting pump (7) are ...); the two-component material is fully stirred in the medium chamber (101) through the stirring shaft (3); the grouting pump motor (6) and the three-plunger grouting pump (7) are sealed and sleeved on the stirring shaft (3); the two-component material is fully stirred in the medium chamber (101) through the stirring shaft (3); the grouting pump motor (6) and the three-plunger grouting pump (7) are sealed and sleeved on the stirring shaft (3); the two-component material is fully stirred in the medium chamber (101) through the stirring shaft (3); the grouting pump motor (6) and the three-plunger grouting pump (7) are sealed and sleeved on the stirring shaft (3 The plug grouting pump (7) is installed in the grouting chamber (103) and is electrically connected to the control equipment in the main control room (102), and the grouting pump motor (6) is connected to the three-plunger grouting pump (7); the slurry inlet tee (5) is installed between the medium chamber (101) and the grouting chamber (103), and the feed port of the slurry inlet tee (5) is connected to the bottom of the medium chamber (101), the three discharge ports of the slurry inlet tee (5) are connected to the three-way plunger pairs of the three-plunger grouting pump (7), and the slurry discharge port (8) is embedded in the outer wall of the grouting chamber (103) and is connected to the discharge port of the three-plunger grouting pump (7); the temperature sensor (9) and the heating rod (10) are installed in the medium chamber (101) and are electrically connected to the control equipment in the main control room (102).

2. The lightweight tunnel grouting device according to claim 1, characterized in that: The medium chamber (101) is provided with a bottom plate (104), and the bottom plate (104) divides the medium chamber (101) into a stirring chamber located above the bottom plate (104) and a control chamber located below the bottom plate (104); the stirring chamber and the control chamber are independent of each other, the stirring motor (2) is installed in the control chamber, and the stirring shaft (3) and the stirring shaft sleeve (4) are installed in the stirring chamber; the pulp inlet tee (5) and the temperature sensor (9) are respectively arranged below and above the bottom plate (104), and the heating rod (10) is located beside the pulp inlet tee (5).

3. The lightweight tunnel grouting device according to claim 2, characterized in that: The stirring shaft (3) comprises a main shaft body (301), a first stirring blade (302) and a second stirring blade (303); one end of the main shaft body (301) is sealed and penetrates the bottom plate (104) and is coaxially fixedly connected to the output shaft of the stirring motor (2); the stirring shaft sleeve (4) is sealed and sleeved on the stirring shaft (3); the first stirring blade (302) and the second stirring blade (303) are sleeved on the stirring shaft sleeve (4) in an upper and lower staggered manner.

4. The lightweight tunnel grouting device according to claim 3, characterized in that: The bottom plate (104) is provided with an upward-turning sleeve (105), which extends upward and is sleeved on the lower portion of the stirring shaft (3). The lower portion of the stirring shaft sleeve (4) is rotatably sleeved on the upward-turning sleeve (105), and the upper end of the stirring shaft sleeve (4) extends to the top of the medium chamber (101).

5. The lightweight tunnel grouting device according to claim 3 is characterized in that: The first stirring blade (302) is composed of a plurality of fan-shaped stirring blades, and the second stirring blade (303) is composed of a plurality of L-shaped stirring blades. The second stirring blade (303) is arranged higher than the first stirring blade (302).

6. The lightweight tunnel grouting device according to claim 3, characterized in that: A liquid level sensor (106) is provided in the medium chamber (101), and the liquid level sensor (106) and the first stirring blade (302) are located at the same height.

7. The lightweight tunnel grouting device according to claim 1, characterized in that: The three-plunger grouting pump (7) is provided with a pressure sensor (107), and the pressure sensor (107) is electrically connected to the control equipment in the main control room (102).

8. The lightweight tunnel grouting device according to claim 1, characterized in that: The main control room (102) is located beside the stirring chamber. A handle (108) is provided on the top of the main control room (102), and handles (108) are provided on both sides of the outer wall of the device housing (1).

9. The lightweight tunnel grouting device according to claim 1, characterized in that: Shock-absorbing pads (109) are respectively provided at the bottom corners of the device housing (1).

10. The lightweight tunnel grouting device according to claim 1, characterized in that: The top of the master control room (102) is embedded with buttons (110) and a display screen (111), and the buttons (110) and the display screen (111) are electrically connected to the control equipment in the master control room (102).

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