Old road subgrade grouting equipment

Abstract

The present invention discloses an old roadbed grouting device, comprising a support base and a grouting tank body, wherein the grouting tank body is fixedly mounted on the top of the support base, a handrail is provided on one side of the grouting tank body, and a suction pump is provided on the other side of the grouting tank body; the device also comprises: a grouting pipe, which is arranged on the outer wall of the suction pump, and a mounting seat is provided on the right side of the suction pump, and a first hydraulic rod is fixedly connected to the outer wall of the mounting seat, and a lifting plate is provided on the output end of the first hydraulic rod; a support base, which is fixedly connected to the outer wall of the lifting plate, and a second hydraulic rod is provided on the inner side of the support base. In the old roadbed grouting device, when the piston moves to the right, it squeezes the gas in the docking seat, and allows the gas to enter the lifting shell through the second airtight block, and allows the lifting rod and lifting plate in the lifting shell to move upward, so as to automatically lift the cement floor in contact with the lifting plate.

Description

Technical Field

[0001] The invention relates to the technical field of road surface repair, in particular to old road subgrade grouting equipment. Background Art

[0002] The road base includes embankments filled with natural soil and stone and cuttings dug out in natural strata. The road base needs to be treated when paving cement pavement and asphalt pavement. When the paved cement pavement has been used for a long time, some old road bases will sink due to geology and rain erosion, which will cause depressions in the cement pavement on the road surface, affecting the normal driving of vehicles. When treating this part of the road surface, it is necessary to inject concrete into the road base under the cement ground for filling and repair.

[0003] When grouting and filling repairs are carried out under cement pavements, some settled pavements will produce large cracks. Foreign matter such as sand and dust from the outside will enter the settled part of the roadbed through the cracks. In order to reduce the impact of foreign matter such as sand and dust on the bonding strength between the cement pavement and the grouting, they need to be cleaned. Traditional cleaning methods cannot effectively clean the sand and dust foreign matter inside, and the cleaning operation is relatively cumbersome, which increases the difficulty of grouting repair to a certain extent.

[0004] In response to existing problems, it is urgent to innovate based on the original grouting construction. Summary of the Invention

[0005] The purpose of the present invention is to provide old roadbed grouting equipment to solve the problem raised in the above background technology that when grouting filling and repair are carried out under the cement pavement, some settled road surfaces will produce large cracks, and foreign matter such as sand and dust from the outside will enter the roadbed settlement through the cracks. In order to reduce the influence of foreign matter such as sand and dust on the bonding strength between the cement pavement and the grouting, it is necessary to clean them. Traditional cleaning methods cannot clean the sand and dust foreign matter inside them well, and the cleaning operation is relatively cumbersome, which increases the difficulty of grouting repair to a certain extent.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an old roadbed grouting device, comprising a support base and a grouting tank body, wherein the grouting tank body is fixedly mounted on the top of the support base, a handrail is provided on one side of the grouting tank body, and a suction pump is provided on the other side of the grouting tank body;

[0007] Also includes:

[0008] A grouting pipe is provided on the outer wall of the suction pump, and a mounting seat is provided on the right side of the suction pump, and a first hydraulic rod is fixedly connected to the outer wall of the mounting seat, and a lifting plate is provided at the output end of the first hydraulic rod;

[0009] A support base is fixedly connected to the outer wall of the lifting plate, and a second hydraulic rod is provided on the inner side of the support base, and a movable plate is provided at the output end of the second hydraulic rod, and a docking seat is provided on the outer wall of the movable plate;

[0010] The air intake pipe is arranged on the outer wall of the docking seat, and a motor is installed inside the docking seat, and a rotating disk is provided at the output end of the motor, a push rod is movably installed on the side of the rotating disk, and a third hydraulic rod is provided on the inner side of the push rod, and a docking frame is provided at the output end of the third hydraulic rod, and a piston is provided at the end of the docking frame, a liquid inlet mechanism is provided on the side of the air intake pipe, and a lifting shell is provided on the right side of the liquid inlet mechanism, and a lifting rod is movably installed inside the lifting shell, and a lifting disk is provided at the end of the lifting rod.

[0011] As an optional solution to the old roadbed grouting equipment described in the present invention, the piston member includes a piston block, a thimble, a connecting slot, a sealing block and a first spring, and the thimble is fixed to the outer wall of the piston block, and a connecting slot is opened inside the piston block, and the piston block and the docking frame are movably connected.

[0012] As an optional solution for the old roadbed grouting equipment described in the present invention, the liquid inlet mechanism includes a liquid inlet shell, a movable rod, a docking spring, a first airtight block and a first airbag, and a movable rod is movably installed inside the liquid inlet shell, and the end of the movable rod is fixedly connected to the first airtight block, and a docking spring is provided on the outside of the movable rod.

[0013] As an optional solution of the old roadbed grouting equipment described in the present invention, the first airtight block and the movable rod are integrated, and the outer surface of the first airtight block and the inner surface of the liquid inlet shell are in contact with each other.

[0014] As an optional solution for the old roadbed grouting equipment described in the present invention, the inner surface of the first airtight block is bonded with a first air bag, and the outer wall of the first air bag is provided with an air guide tube, and the end of the air guide tube is connected to the second air bag, and the side of the second air bag is bonded with an extrusion block.

[0015] As an optional solution for the old roadbed grouting equipment described in the present invention, the first airbag is connected to the second airbag through an air duct, and an extrusion block is bonded to the side of the second airbag, and a drainage groove is provided on the side of the extrusion block, and the drainage groove is opened inside the docking seat.

[0016] As an optional solution for the old roadbed grouting equipment described in the present invention, a limiting rod is provided at the bottom of the jacking rod, and the end of the limiting rod is fixedly connected to a second airtight block, and a second spring is provided on the side of the second airtight block, and the limiting rod runs through the interior of the second spring, and there is always a gap between the limiting rod and the jacking rod.

[0017] As an optional solution to the old roadbed grouting equipment described in the present invention, the outer wall of the jacking plate is provided with a traction wire, and a third spring is provided on the outside of the traction wire, and the end of the traction wire is fixedly connected to a docking block.

[0018] As an optional solution for the old roadbed grouting equipment described in the present invention, the longitudinal section of the docking block is arranged in an "L"-shaped structure, and a sealing plate is provided at the end of the docking block, and a third airtight block is provided on the side of the sealing plate.

[0019] As an optional solution for the old roadbed grouting equipment described in the present invention, the outer surface of the third airtight block fits the inner surface of the docking seat, and a sliding rod is provided on the outer wall of the third airtight block, and a fourth spring is provided on the outer side of the sliding rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The old roadbed grouting equipment is provided with a piston. The rotation of the rotating disk drives the push rod and the piston to reciprocate in the docking seat. When the piston moves to the right, it squeezes the gas in the docking seat and allows the gas to enter the jacking shell through the second airtight block, and causes the jacking rod and the jacking plate in the jacking shell to move upward, thereby automatically jacking the cement floor in contact with the jacking plate. The second airtight block and the second spring provided at the bottom of the jacking shell are used to prevent the air flow from entering the jacking shell from flowing back. When the piston stops moving, the cement floor can still be jacked.

[0022] 2. The old roadbed grouting equipment is provided with a blocking plate, which is used to block the flow channel at the third airtight block by using the blocking plate provided on the side of the third airtight block to prevent the jacking plate from moving close to the top of the jacking shell and causing gas to be ejected from the nozzle on the right side of the third airtight block, thereby affecting the normal lifting of the jacking plate. When the jacking plate is about to approach the top of the jacking shell, the jacking plate will drive the traction wire to pull the docking block and the blocking plate, opening the flow channel on the left side of the third airtight block, allowing the airflow to push the third airtight block, thereby achieving the effect of gas ejecting from the nozzle on the right side of the third airtight block;

[0023] 3. The old roadbed grouting equipment is provided with a push rod. When the third hydraulic rod in the push rod remains in a contracted state, the push rod drives the piston block and the ejector pin to move. At this time, there is a gap between the ejector pin and the extrusion block. When the piston block reciprocates, only gas is generated, which makes the lifting plate rise and allows the gas to be ejected through the air holes at the third airtight block. The ejected gas is used to blow away the dust and foreign matter at the bottom of the cement ground, avoiding affecting the combination of the later grouting repair fluid with the roadbed and cement pavement. When the length of the third hydraulic rod is adjusted to increase the distance between the piston block and the push rod, the piston block moves to the right, which squeezes the extrusion block and the second air bag to open the flow channel in the liquid inlet shell, allowing the liquid to flow into the docking seat, accompanied by gas ejection, to achieve the effect of spraying water mist to moisten the roadbed and cement pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure between the mounting base and the lifting plate of the present invention;

[0026] Figure 3 This is a schematic diagram of the connection structure between the support base and the movable plate of the present invention;

[0027] Figure 4 This is a schematic cross-sectional structural diagram of the docking seat of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection structure between the push rod and the docking frame of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the piston block and the blocking block of the present invention;

[0030] Figure 7 This is a schematic cross-sectional structural diagram of a piston block according to the present invention;

[0031] Figure 8 For the present invention Figure 4 A in the middle is an enlarged structural diagram;

[0032] Figure 9 For the present invention Figure 4 Enlarged structural diagram at point B in the middle.

[0033] In the figure: 1. Support base; 2. Grouting tank; 3. Handrail; 4. Suction pump; 5. Grouting pipe; 6. Mounting seat; 7. First hydraulic rod; 8. Lifting plate; 9. Support base; 10. Second hydraulic rod; 11. Movable plate; 12. Docking seat; 13. Inlet pipe; 14. Motor; 15. Rotating plate; 16. Push rod; 17. Third hydraulic rod; 18. Docking frame; 19. Piston; 1901. Piston block; 1902. Ejector pin; 1903. Connecting slot; 1904. Blocking block; 1905. First spring; 20. Liquid inlet mechanism; 2001, liquid inlet shell; 2002, movable rod; 2003, docking spring; 2004, first airtight block; 2005, first airbag; 21, lifting shell; 22, lifting rod; 23, lifting plate; 24, limiting rod; 25, second airtight block; 26, second spring; 27, traction wire; 28, third spring; 29, docking block; 30, sealing plate; 31, third airtight block; 32, sliding rod; 33, fourth spring; 34, air guide tube; 35, second airbag; 36, extrusion block; 37, drainage trough. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] This embodiment is intended to facilitate solving the problem of how to automatically lift the cement floor. Figures 1 to 7 The present invention provides a technical solution: an old roadbed grouting device, comprising a support base 1 and a grouting tank body 2, wherein the grouting tank body 2 is fixedly mounted on the top of the support base 1, a handrail 3 is provided on one side of the grouting tank body 2, and a suction pump 4 is provided on the other side of the grouting tank body 2; and further comprising:

[0037] A grouting pipe 5 is provided on the outer wall of the suction pump 4, and a mounting seat 6 is provided on the right side of the suction pump 4. A first hydraulic rod 7 is fixedly connected to the outer wall of the mounting seat 6, and a lifting plate 8 is provided at the output end of the first hydraulic rod 7;

[0038] A support base 9 is fixedly connected to the outer wall of the lifting plate 8, and a second hydraulic rod 10 is provided on the inner side of the support base 9, and a movable plate 11 is provided at the output end of the second hydraulic rod 10, and a docking seat 12 is provided on the outer wall of the movable plate 11;

[0039] An air intake pipe 13 is provided on the outer wall of the docking seat 12, and a motor 14 is installed inside the docking seat 12, and a rotating disk 15 is provided at the output end of the motor 14, a push rod 16 is movably installed on the side of the rotating disk 15, and a third hydraulic rod 17 is provided on the inner side of the push rod 16, and a docking frame 18 is provided at the output end of the third hydraulic rod 17, and a piston 19 is provided at the end of the docking frame 18, a liquid inlet mechanism 20 is provided on the side of the air intake pipe 13, and a lifting shell 21 is provided on the right side of the liquid inlet mechanism 20, and a lifting rod 22 is movably installed inside the lifting shell 21, and a lifting disk 23 is provided at the end of the lifting rod 22;

[0040] The piston member 19 includes a piston block 1901, a ejector pin 1902, a connecting slot 1903, a blocking block 1904 and a first spring 1905. The ejector pin 1902 is fixed to the outer wall of the piston block 1901, and a connecting slot 1903 is opened inside the piston block 1901. At the same time, the piston block 1901 and the docking frame 18 are movably connected. A limiting rod 24 is provided at the bottom of the lifting rod 22, and the end of the limiting rod 24 is fixedly connected to the second airtight block 25. A second spring 26 is provided on the side of the second airtight block 25. At the same time, the limiting rod 24 runs through the interior of the second spring 26, and there is always a gap between the limiting rod 24 and the lifting rod 22.

[0041] First, push the handrail 3 to push the grouting equipment to the sunken cement ground, and let the person use tools to dig a groove in the sunken ground. By controlling the movement of the first hydraulic rod 7 on the mounting seat 6, the first hydraulic rod 7 drives the lifting plate 8 and the support base 9 to descend, and the support base 9 is brought into contact with the ground at the bottom of the groove. Then, by controlling the movement of the second hydraulic rod 10, the second hydraulic rod 10 drives the movable plate 11 and the docking seat 12 to move on the support base 9, so that the jacking shell 21 on the docking seat 12 is located at the bottom of the cement pavement to be jacked up;

[0042] By controlling the rotation of the motor 14 inside the docking seat 12, the motor 14 drives the rotating disk 15 to rotate, and the rotating disk 15 is movably connected to the push rod 16. The rotation of the rotating disk 15 drives the push rod 16 and the docking frame 18 to move, and the docking frame 18 is movably connected to the piston block 1901, so that the push rod 16 and the piston block 1901 can reciprocate in the docking seat 12. When the piston block 1901 moves to the right, it squeezes the gas in the docking seat 12, allowing the gas in the docking seat 12 to move to the right. At this time, the side of the third airtight block 31 is blocked. The plate 30 is in a closed state, allowing the gas to squeeze the second airtight block 25 at the bottom of the jacking shell 21, allowing the second airtight block 25 to drive the limit rod 24 to slide in the jacking shell 21 and squeeze the second spring 26, opening the flow channel at the second airtight block 25, allowing the gas to enter the jacking shell 21. The gas entering the jacking shell 21 will push the jacking rod 22 and the jacking plate 23 to move upward. The continuous movement of the jacking plate 23 is used to lift the sunken cement floor, avoiding the impact of the sunken cement floor on the subsequent grouting repair.

[0043] By utilizing the blocking block 1904 provided on the piston block 1901, when the piston block 1901 moves to the right, the blocking block 1904 will contact the piston block 1901 to prevent the gas from flowing out of the blocking block 1904. When the piston block 1901 moves to the left, a certain negative pressure will be generated as the piston block 1901 moves to the left, causing the blocking block 1904 on the piston block 1901 to slide on the connecting slot 1903 and squeeze the first spring 1905. When the blocking block 1904 is separated from the piston block 1901, the flow channel at the connecting slot 1903 is opened, allowing external gas to enter the docking seat 12 through the air inlet pipe 13 and finally flow to the right side of the piston block 1901, so that the air can be pushed and squeezed again when the piston block 1901 moves to the right next time.

[0044] The piston block 1901 is used to reciprocate to achieve the effect of continuously squeezing the air, and the second spring 26 provided on the limiting rod 24, when there is no gas to squeeze the second airtight block 25, the restoring elastic force of the second spring 26 drives the second airtight block 25 and the limiting rod 24 to reset, so that the second airtight block 25 is in contact with the jacking shell 21, thereby blocking the flow channel at the second airtight block 25, preventing the air flow in the jacking shell 21 from flowing back through the flow channel at the second airtight block 25, keeping the jacking plate 23 in the jacking state, and preventing the gas in the jacking shell 21 from flowing back to the docking seat 12 again when the piston block 1901 moves to the left subsequently;

[0045] Example 2

[0046] This embodiment is intended to facilitate the solution of the problem of how to automatically clean the dust on the cement pavement and roadbed during the jacking process. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 4 and Figure 9 , the outer wall of the jacking plate 23 is provided with a traction wire 27, and a third spring 28 is provided on the outside of the traction wire 27, and the end of the traction wire 27 is fixedly connected to the docking block 29, the longitudinal section of the docking block 29 is an "L"-shaped structure, and a sealing plate 30 is provided at the end of the docking block 29, and a third airtight block 31 is provided on the side of the sealing plate 30, the outer surface of the third airtight block 31 is in contact with the inner surface of the docking seat 12, and a sliding rod 32 is provided on the outer wall of the third airtight block 31, and a fourth spring 33 is sleeved on the outside of the sliding rod 32;

[0047] When the gas drives the lifting rod 22 and the lifting plate 23 to move upward, when the lifting plate 23 moves close to the top of the lifting shell 21, the lifting plate 23 will pull the traction wire 27 in the lifting shell 21, and the end of the traction wire 27 is fixedly connected to the docking block 29, thereby driving the docking block 29 and the blocking plate 30 to move, and a third spring 28 is provided on the top of the docking block 29. When the docking block 29 moves upward, the third spring 28 is squeezed. As the docking block 29 and the blocking plate 30 continue to move upward, the air inlet channel on the left side of the third airtight block 31 is opened, allowing the gas in the docking seat 12 to flow to the left side of the third airtight block 31;

[0048] At this time, the piston block 1901 continues to reciprocate, and will push the gas in the docking seat 12 again. Because the lifting plate 23 is about to move to the highest position, and there is a cement pavement on the top, the force required for the gas to push the second air-tight block 25 is much greater than the force required to push the third air-tight block 31, and then the gas pushes the third air-tight block 31, allowing the third air-tight block 31 to drive the sliding rod 32 to move, and at the same time squeeze the fourth spring 33. As the third air-tight block 31 continues to move, the flow channel at the third air-tight block 31 is opened, allowing the gas to be ejected from the nozzle at the third air-tight block 31, and the ejected air flow is used to blow the roadbed and cement ground, and the dust on the roadbed and cement ground is cleaned to prevent dust and other foreign matter from affecting the subsequent grouting repair fluid and the cement pavement and roadbed.

[0049] Example 3

[0050] This embodiment is intended to facilitate the solution of the problem of how to wet the cement floor and roadbed. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 4 and Figure 8The liquid inlet mechanism 20 includes a liquid inlet housing 2001, a movable rod 2002, a docking spring 2003, a first airtight block 2004 and a first airbag 2005, and the movable rod 2002 is movably installed inside the liquid inlet housing 2001, and the end of the movable rod 2002 is fixedly connected to the first airtight block 2004, and the docking spring 2003 is provided on the outside of the movable rod 2002. The first airtight block 2004 and the movable rod 2002 are integrated, and the outer surface of the first airtight block 2004 is connected to the inner surface of the liquid inlet housing 2001. The surfaces are bonded to each other. The inner surface of the first airtight block 2004 is bonded to the first airbag 2005. The outer wall of the first airbag 2005 is provided with an air guide tube 34. The end of the air guide tube 34 is connected to the second airbag 35. At the same time, an extrusion block 36 is bonded to the side of the second airbag 35. The first airbag 2005 is connected to the second airbag 35 through the air guide tube 34. The side of the second airbag 35 is bonded with an extrusion block 36. A drainage groove 37 is provided on the side of the extrusion block 36. At the same time, the drainage groove 37 is opened inside the docking seat 12.

[0051] An ejector pin 1902 is provided on the outer wall of the piston block 1901. When the third hydraulic rod 17 in the push rod 16 remains in a retracted state, the piston block 1901 drives the ejector pin 1902 to reciprocate without contacting the extrusion block 36, so that the reciprocating motion of the piston block 1901 is in a pure gas-pushing state. When the lifting plate 23 is in the highest lifting state, the length between the piston block 1901 and the push rod 16 can be adjusted by controlling the movement of the third hydraulic rod 17 in the push rod 16, which drives the docking frame 18 to slide within the push rod 16.

[0052] When the piston block 1901 moves to the right again at this time, the piston block 1901 will push the squeezing block 36, and the squeezing block 36 will squeeze the second airbag 35, allowing the gas in the second airbag 35 to enter the first airbag 2005 through the air guide tube 34 and expand the first airbag 2005. When the first airbag 2005 expands, the first airbag 2005 will drive the first airtight block 2004 and the movable rod 2002 to move upward and squeeze the docking spring 2003. When the first airtight block 2004 is separated from the liquid inlet housing 2001, the first airtight block 200 The circulation channel at 4 allows the liquid to flow through the liquid inlet housing 2001 and the drainage groove 37 to the sealing plate 30 and outflow, allowing the gas and liquid to mix. When the piston block 1901 moves to the right again next time, the liquid and gas are mixed into a water mist and sprayed out, which has a moistening effect on the cement floor and roadbed. In addition, the slot in the extrusion block 36 that allows the ejector pin 1902 to pass through is smaller, which effectively reduces the force applied to the extrusion block 36 by the gas when the piston block 1901 pushes the gas to the right, thereby preventing the extrusion block 36 from squeezing the second airbag 35 to open the circulation channel when the piston block 1901 moves back and forth normally.

[0053] It is convenient to realize the single air extrusion state and the air-liquid mixed extrusion state by controlling the maximum position of the piston block 1901 to move to the right according to actual needs, thereby improving the practicality of the device and avoiding the liquid entering the jacking shell 21 in the initial stage of jacking the jacking plate 23, causing the jacking plate 23 to be difficult to reset to its initial state. Subsequently, by controlling the rotation of the suction pump 4 on the support base 1, the grouting tank body 2 is sucked, and the grouting repair liquid in the grouting tank body 2 flows out from the grouting pipe 5, so as to realize grouting repair treatment of the subsided roadbed. When the jacking plate 23 needs to be reset, the exhaust knob provided on the left outer wall of the jacking shell 21 is turned to separate the exhaust knob from the jacking shell 21, so that the gas can be discharged smoothly and the jacking plate 23 can be reset.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0055] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Old roadbed grouting equipment, including a support base and a grouting tank body, the grouting tank body is fixedly installed on the top of the support base, and a handrail is provided on one side of the grouting tank body, and a suction pump is provided on the other side of the grouting tank body; It is characterized in that Also includes: A grouting pipe is provided on the outer wall of the suction pump, and a mounting seat is provided on the right side of the suction pump, and a first hydraulic rod is fixedly connected to the outer wall of the mounting seat, and a lifting plate is provided at the output end of the first hydraulic rod; A support base is fixedly connected to the outer wall of the lifting plate, and a second hydraulic rod is provided on the inner side of the support base, and a movable plate is provided at the output end of the second hydraulic rod, and a docking seat is provided on the outer wall of the movable plate; An air intake pipe is provided on the outer wall of the docking seat, and a motor is installed inside the docking seat, and a rotating disk is provided at the output end of the motor, a push rod is movably installed on the side of the rotating disk, and a third hydraulic rod is provided on the inner side of the push rod, and a docking frame is provided at the output end of the third hydraulic rod, and a piston is provided at the end of the docking frame, a liquid inlet mechanism is provided on the side of the air intake pipe, and a lifting shell is provided on the right side of the liquid inlet mechanism, and a lifting rod is movably installed inside the lifting shell, and a lifting disk is provided at the end of the lifting rod; The outer wall of the lifting plate is provided with a traction wire, and a third spring is provided on the outside of the traction wire, and the end of the traction wire is fixedly connected to a docking block, the longitudinal section of the docking block is arranged in an "L" shape, and a sealing plate is provided at the end of the docking block, and a third air-tight block is provided on the side of the sealing plate, the outer surface of the third air-tight block is in contact with the inner surface of the docking seat, and the outer wall of the third air-tight block is provided with a sliding rod, and the outer sleeve of the sliding rod is provided with a fourth spring.

2. The old roadbed grouting equipment according to claim 1, characterized in that: The piston member includes a piston block, an ejector pin, a connecting slot, a blocking block and a first spring. The ejector pin is fixed to the outer wall of the piston block, and a connecting slot is opened inside the piston block. At the same time, the piston block and the docking frame are movably connected.

3. The old roadbed grouting equipment according to claim 2, characterized in that: The liquid inlet mechanism includes a liquid inlet shell, a movable rod, a docking spring, a first airtight block and a first airbag, and the movable rod is movably installed inside the liquid inlet shell, and the end of the movable rod is fixedly connected to the first airtight block, and a docking spring is arranged on the outside of the movable rod.

4. The old roadbed grouting equipment according to claim 3, characterized in that: The first airtight block and the movable rod are integrated, and the outer surface of the first airtight block and the inner surface of the liquid inlet housing are in contact with each other.

5. The old roadbed grouting equipment according to claim 4, characterized in that: The inner surface of the first airtight block is bonded with the first airbag, and the outer wall of the first airbag is provided with an air guide tube, and the end of the air guide tube is connected to the second airbag, and the side of the second airbag is bonded with an extrusion block.

6. The old roadbed grouting equipment according to claim 5, characterized in that: The first airbag is connected to the second airbag through an air guide tube, and an extrusion block is bonded to the side of the second airbag, and a drainage groove is provided on the side of the extrusion block, and the drainage groove is opened inside the docking seat.

7. The old roadbed grouting equipment according to claim 1, characterized in that: A limiting rod is provided at the bottom of the lifting rod, and the end of the limiting rod is fixedly connected to the second airtight block, and a second spring is provided on the side of the second airtight block. At the same time, the limiting rod runs through the interior of the second spring, and there is always a gap between the limiting rod and the lifting rod.

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