A pulse pump and grouting system suitable for tunnel / roadway grouting

Abstract

The present invention provides a pulse pump and grouting system suitable for tunnel / tunnel grouting, relating to the technical field of cement slurry pumping devices, and comprising a housing, the housing being divided into a crankshaft power chamber and a slurry pumping chamber by a partition, wherein an inlet and outlet assembly block is fixedly installed in the slurry pumping chamber. The present invention adopts a variable diameter pumping cylinder, which can adjust the diameter of the cylinder according to the resistance and pressure of the cement slurry. When the pumping resistance is large, the diameter of the pumping cylinder can be reduced to reduce the starting pressure. When entering the stable pumping stage, the cylinder diameter is increased to ensure the pumping volume. This design can adaptively adjust the density of the cement slurry, ensuring a smooth pumping process while reducing the burden on the pumping power mechanism, and significantly improving the pumping performance of the cement slurry.

Description

Technical Field

[0001] The invention relates to the technical field of cement slurry pumping devices, in particular to a pulse pump and a grouting system suitable for tunnel / tunnel grouting. Background Art

[0002] The surrounding rock strength of deep soft rock tunnels / roadways is low, making excavation difficult. Under dynamic disturbances, rock fractures are prone to expansion and development, triggering tunnel water inrush hazards. Grouting is an effective method for strengthening the surrounding rock mass and mitigating hazards such as tunnel water inrush. However, crack-closing grouting in deep soft rock tunnels is difficult to inject, as the cement grout has a limited diffusion range and low surrounding rock strength. Pulse grouting uses a pulse pump to deliver periodic pulses of constant-pressure grouting to inject grout into fractured rock. Pulse loading fully expands and connects microcracks, opening up natural fractures, increasing the fracture network within the rock mass, and improving grout permeability. Furthermore, pulse fracturing can create multiple fractures, broadening the grout diffusion range. However, deep soft rock formations often contain large amounts of clay minerals, which are highly water-absorbent. Dehydration of the grout within the fractured rock matrix causes changes in viscosity, resulting in significant fluctuations in grouting pressure and making precise control of grouting pressure difficult.

[0003] Prior art publication number "CN104863157A" describes a modified concrete grouting system. A weight sensor is installed in a measuring barrel, and a mixer supplies slurry to the measuring barrel via a first valve. The measuring barrel is connected to a grouting device via a pump, and the grouting device is equipped with a vibrator. A grouting method using this modified concrete grouting system includes the following steps: 1. Inserting the grouting device into the concrete, manually pressing a remote control to start grouting with the pump and vibrating with the vibrator; 2. When the weight of the cement slurry in the measuring barrel decreases and the weight sensor detects a decrease below a set value, the pump is stopped, grouting ceases, and the vibrator stops vibrating after a delay. These steps achieve quantitative grouting. This device provides a modified concrete grouting system and grouting method. By providing a self-weighing measuring barrel, the grouting system automatically performs grouting according to a predetermined grouting volume.

[0004] However, the above-mentioned device still has obvious defects during use: the cement mortar pump in the above-mentioned device and the prior art all adopts a fixed-diameter cylinder pump cylinder. Since cement mortar has poor fluidity and high density, the traditional fixed-diameter piston may cause uneven pressure distribution during pumping, affecting the pumping efficiency, and the pumping pressure needs to be increased in the early stage of pumping to ensure that the cement slurry can smoothly complete the pumping operation. Therefore, the above-mentioned pump machine with a fixed cylinder structure cannot adaptively adjust the pump body diameter according to the density of the slurry. The use of a fixed diameter pumping method may cause problems such as abnormal pumping on the one hand, and on the other hand, it will increase the burden on the pumping power mechanism, thereby affecting the overall life of the device. Summary of the Invention

[0005] The object of the present invention is to provide a pulse pump and a grouting system suitable for tunnel / tunnel grouting to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A pulse pump suitable for tunnel / tunnel grouting, comprising a housing, the housing being divided into a crankshaft power chamber and a slurry pumping chamber by a partition, characterized in that an inlet and outlet assembly block is fixedly installed in the slurry pumping chamber, a feed pipe and a discharge pipe are connected to the inlet and outlet assembly block, and a plurality of outer diameter adjustment rings are coaxially telescopically provided on the outer side of the inlet and outlet assembly block;

[0008] A main pump injection block is telescopically provided on one side of the inlet and outlet assembly block, and an inner diameter matching ring is provided in the box body of the main pump injection block away from the inlet and outlet assembly block, and the inner diameter matching ring is movably matched with the main pump injection block;

[0009] The main pump injection block, the inlet and outlet assembly block, the outer diameter adjustment ring and the inner diameter matching ring are combined to form the pumping inner cylinder body. The main pump injection block cooperates with the corresponding outer diameter adjustment ring by itself or in combination with the inner diameter matching ring, thereby adjusting the volume of the pumping inner cylinder body in a step-by-step manner.

[0010] Preferably, adjacent outer diameter adjustment rings are slidably fitted with each other and a sealing ring is installed on the inner wall of each outer diameter adjustment ring. Several outer diameter adjustment rings perform telescopic movement driven by an independently set telescopic mechanism, and only one outer diameter adjustment ring is in an inward extension state at the same time.

[0011] Preferably, the sum of the number of the inner diameter matching rings and the main pump injection block is equal to the number of the outer diameter adjustment rings, the outer side surface of the main pump injection block is slidingly matched with the inner side surface of the innermost outer diameter adjustment ring, and the outer side surface of the inner diameter matching ring is slidingly matched with the inner side surface of the corresponding outer diameter adjustment ring.

[0012] Preferably, the main pump injection block is also fixedly connected to a telescopic shaft on the side away from the inlet and outlet assembly blocks. The main pump injection block or its combination with the inner diameter matching ring slides translationally during the extension and contraction of the telescopic shaft, thereby pumping the slurry from the feed pipe into the pumping inner cylinder and pumping it out from the discharge pipe.

[0013] Preferably, the telescopic mechanism that drives several outer diameter adjustment rings to perform telescopic movement is an electric hydraulic telescopic cylinder. A single outer diameter adjustment ring is connected to multiple electric hydraulic telescopic cylinders arranged in a circular array along the axis of the outer diameter adjustment ring. The electric hydraulic telescopic cylinder is fixedly mounted on a box on one side of the slurry pumping chamber.

[0014] Preferably, the box body is further provided with a pair of sliding grooves arranged upper and lower on one side of the slurry pumping chamber, and sliding blocks are provided in the sliding grooves for translational sliding. Telescopic connecting rods are fixedly installed on the upper and lower sliding blocks, and the telescopic connecting rods are telescopically installed on the telescopic cylinder body. A limiting groove for inserting the telescopic connecting rod is provided through the inner diameter matching ring, and the inner diameter matching ring is limited and fixed by the telescopic connecting rod extending into the limiting groove.

[0015] Preferably, a telescopic mating pin is further provided on the side of the main pump injection block, and the mating pin is fixedly connected to the telescopic arm of the electric telescopic cylinder provided inside the main pump injection block. The telescopic movement of the electric telescopic cylinder drives the mating pin to perform telescopic movement synchronously. In the retracted state, the mating pin is flush with the side of the main pump injection block. In the extended state, the mating pin protrudes from the side of the main pump injection block and cooperates with the limiting groove provided on the inner side of the inner diameter matching ring. The fixed connection between the main pump injection block and the inner diameter matching ring is achieved through the cooperation between the mating pin and the limiting groove.

[0016] Preferably, a limit hole is provided on the outside of the outer diameter adjustment ring, and a plurality of telescopic limit cylinders are provided in a circular array on the box where the slurry pumping chamber is located. The telescopic rods of the telescopic limit cylinders cooperate with the limit holes on the side of the outer diameter adjustment ring when the outer diameter adjustment ring is extended inward.

[0017] Preferably, the box body is located on one side of the crankshaft power chamber and is also fixedly rotatably mounted with a power crankshaft, the power crankshaft is movably connected to the crankshaft connecting rod, and the crankshaft connecting rod is movably connected to the telescopic shaft, and the telescopic shaft is driven to perform reciprocating telescopic motion through the rotation of the power crankshaft.

[0018] A grouting system includes the above-mentioned pulse pump suitable for tunnel / tunnel grouting, including the pulse pump, a feeding device, a mixing device and a stirring device, the feeding device, the mixing device and the stirring device are connected through a feed pipe, the pulse pump is arranged at the rear end of the stirring device, and the feed pipe of the pulse pump is connected to the stirring device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention adopts a variable diameter pumping cylinder, which can adjust the diameter of the cylinder according to the resistance and pressure of the cement slurry. When the pumping resistance is large, the diameter of the pumping cylinder can be reduced to reduce the starting pressure. When entering the stable pumping stage, the pumping volume is guaranteed by increasing the cylinder diameter. This design can adaptively adjust the density of the cement slurry, ensuring the smooth progress of the pumping process while reducing the burden on the pumping power mechanism, and can significantly improve the pumping performance of the cement mortar. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic cross-sectional view of the overall internal structure of the box body of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the internal structure of the slurry pumping chamber of the present invention;

[0023] Figure 3 A schematic diagram of the pumping inner cylinder adjustment process of the present invention;

[0024] Figure 4 This is a schematic diagram of the main pump injection block connection structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the overall structure of the present invention.

[0026] In the figure: 1 box body, 2 crankshaft power chamber, 3 slurry pumping chamber, 4 inlet and outlet assembly block, 5 feed pipe, 6 discharge pipe, 7 outer diameter adjustment ring, 8 sealing ring, 9 main pumping block, 10 inner diameter matching ring, 11 pumping inner cylinder body, 12 telescopic shaft, 13 electric hydraulic telescopic cylinder, 14 sliding groove, 15 sliding block, 16 telescopic connecting rod, 17 limit groove, 18 matching pin shaft, 19 limit hole, 20 telescopic limit cylinder, 21 power crankshaft, 22 crankshaft connecting rod, 23 feeding device, 24 mixing device, 25 stirring device, 26 feed pipe, 27 pulse pump. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-5 , the present invention provides a technical solution:

[0029] Example 1:

[0030] A pulse pump suitable for tunnel / tunnel grouting, comprising a housing 1, the housing 1 being divided into a crankshaft power chamber 2 and a slurry pumping chamber 3 by a partition, an inlet and outlet assembly block 4 being fixedly installed in the slurry pumping chamber 3, a feed pipe 5 and a discharge pipe 6 being connected to the inlet and outlet assembly block 4, the feed pipe 5 and the discharge pipe 6 extending outward from the housing 1 away from the side of the inlet and outlet assembly block 4, a plurality of outer diameter adjustment rings 7 being coaxially telescopically provided on the outer side of the inlet and outlet assembly block 4, adjacent outer diameter adjustment rings 7 being slidably fitted with each other, and a sealing ring 8 being installed on the inner wall of each outer diameter adjustment ring 7, the plurality of outer diameter adjustment rings 7 being driven by an independently provided telescopic mechanism to perform telescopic motion, and only one outer diameter adjustment ring 7 being in an inwardly extended state at any one time;

[0031] A main pump injection block 9 is telescopically provided on the side of the inlet and outlet assembly block 4 away from the feed pipe 5 and the discharge pipe 6. An inner diameter matching ring 10 is further provided in the box body 1 on the side of the main pump injection block 9 away from the inlet and outlet assembly block 4. The inner diameter matching ring 10 is movably matched with the main pump injection block 9. The sum of the number of the inner diameter matching rings 10 and the main pump injection block 9 is equal to the number of the outer diameter adjustment rings 7. The outer side surface of the main pump injection block 9 is slidably matched with the inner side surface of the innermost outer diameter adjustment ring 7, and the outer side surface of the inner diameter matching ring 10 is slidably matched with the inner side surface of the corresponding outer diameter adjustment ring 7;

[0032] The main pump injection block 9, the inlet and outlet assembly block 4, the outer diameter adjustment ring 7 and the inner diameter matching ring 10 enclose a pumping inner cylinder 11. The main pump injection block 9 cooperates with the corresponding outer diameter adjustment ring 7 by itself or in combination with the inner diameter matching ring 10, thereby adjusting the volume of the pumping inner cylinder 11 in a step-by-step manner. The main pump injection block 9 is further fixedly connected to a telescopic shaft 12 on the side away from the inlet and outlet assembly block 4. The main pump injection block 9 or its combination with the inner diameter matching ring 10 translates and slides during the extension and contraction of the telescopic shaft 12, thereby pumping the slurry from the feed pipe 5 into the pumping inner cylinder 11 and pumping it out from the discharge pipe 6.

[0033] The outer contours of the main pump injection block 9, the inlet and outlet assembly block 4, the outer diameter adjustment ring 7 and the inner diameter matching ring 10 are cylindrical.

[0034] In this embodiment, the box body 1 serves as the main structure of the pulse pump, and its interior is divided into a crankshaft power chamber 2 and a slurry pumping chamber 3 by a partition plate, wherein the crankshaft power chamber 2 is used to provide pulse power for the pulse pump, and the slurry pumping chamber 3 is used to realize the pumping in and out of cement slurry. A feed inlet and outlet assembly block 4 is fixedly installed in the slurry pumping chamber 3, to which a feed pipe 5 and a discharge pipe 6 are connected. The feed inlet and outlet assembly block 4 is also movably matched with an outer diameter adjustment ring 7. In this embodiment, three groups of outer diameter adjustment rings 7 are provided, and the three groups of outer diameter adjustment rings 7 have a stepped inner diameter from the inside to the outside. Correspondingly, a main pumping block 9 is also provided on the side of the feed inlet and outlet assembly block 4 away from the feed pipe 5 and the discharge pipe 6. The main pumping block 9 is movably matched with the inner diameter matching ring 10, wherein the sum of the number of the inner diameter matching ring 10 and the main pump injection block 9 is equal to the number of the outer diameter adjustment ring 7, so that the three groups of outer diameter adjustment rings 7 arranged from the inside to the outside have corresponding main pump injection blocks 9 or inner diameter matching rings 10 to match them, and the main pump injection block 9, the inlet and outlet assembly block 4, the outer diameter adjustment ring 7 and the inner diameter matching ring 10 are enclosed to form the pumping inner cylinder 11. In the actual operation process, the different outer diameter adjustment rings 7 are adjusted to be in an inwardly extended state, and the corresponding main pump injection block 9 and the inner diameter matching ring 10 connected thereto are adjusted to correspond thereto, thereby achieving the effect of adjusting the inner diameter of the pumping inner cylinder 11. For the specific adjustment process, please refer to the attached manual. Figure 3In this embodiment, a variable diameter pumping cylinder is set up, which can adjust the diameter of the cylinder according to the resistance and pressure of the mortar. When the pumping resistance is large, the diameter of the pumping cylinder can be reduced to reduce the starting pressure. When entering the stable pumping stage, the cylinder diameter is increased to ensure the pumping volume. This design can adaptively adjust the density of the cement mortar, ensuring the smooth progress of the pumping process while reducing the burden on the pumping power mechanism, and can significantly improve the pumping performance of the cement mortar.

[0035] Example 2:

[0036] The telescopic mechanism that drives several outer diameter adjustment rings 7 to perform telescopic movement is an electric hydraulic telescopic cylinder 13. A single outer diameter adjustment ring 7 is connected to multiple electric hydraulic telescopic cylinders 13 arranged in a circular array along the axis of the outer diameter adjustment ring 7. The electric hydraulic telescopic cylinder 13 is fixedly mounted on the box body 1 on one side of the slurry pumping chamber 3.

[0037] In this embodiment, a specific mechanism for driving the outer diameter adjustment ring 7 to extend and retract is further disclosed. The outer diameter adjustment ring 7 is driven to extend and retract by the extension and retraction of the electric hydraulic telescopic cylinder 13, so that only one of the outer diameter adjustment rings 7 is in an inward extension state at the same time.

[0038] Example 3:

[0039] The box body 1 is located on one side of the slurry pumping chamber 3 and is also provided with a pair of sliding grooves 14 arranged upper and lower. A sliding block 15 is provided in the sliding groove 14 for translational sliding. A telescopic connecting rod 16 is fixedly installed on the upper and lower sliding blocks 15. The telescopic connecting rod 16 is telescopically installed on the telescopic cylinder body. A limiting groove 17 for inserting the telescopic connecting rod 16 is provided through the inner diameter matching ring 10. The telescopic connecting rod 16 extends into the limiting groove 17 to complete the limiting fixation of the inner diameter matching ring 10.

[0040] In this embodiment, the limiting structure of the inner diameter matching ring 10 is further disclosed, and the limiting connection of the inner diameter matching ring 10 is achieved by the cooperation between the telescopic connecting rod 16 and the limiting groove 17. Figure 1-2 When the inner diameter matching ring 10 is not connected to the main pump injection block 9, it is on the side of the main pump injection block 9 away from the outer diameter adjustment ring 7. In this process, in order to ensure the stability of the connection of the inner diameter matching ring 10, multiple telescopic connecting rods 16 arranged in a ring array cooperate with the limiting groove 17 opened on the inner diameter matching ring 10, thereby realizing the limiting fixation of the inner diameter matching ring 10. Furthermore, the sliding block 15 slides in the sliding groove 14 to complete the matching of the inner diameter matching ring 10 and the main pump injection block 9, and provides conditions for the subsequent connection of the inner diameter matching ring 10 and the main pump injection block 9, wherein the mechanism that drives the sliding block 15 to slide in the sliding groove is a screw translation mechanism.

[0041] Example 4:

[0042] A telescopic mating pin 18 is also provided on the side of the main pump injection block 9. The mating pin 18 is fixedly connected to the telescopic arm of the electric telescopic cylinder arranged inside the main pump injection block 9. The telescopic movement of the electric telescopic cylinder drives the mating pin 18 to perform telescopic movement synchronously. In the retracted state, the mating pin 18 is flush with the side of the main pump injection block 9. In the extended state, the mating pin 18 protrudes from the side of the main pump injection block 9 and cooperates with the limiting groove 17 opened on the inner side of the inner diameter matching ring 10. The fixed connection between the main pump injection block 9 and the inner diameter matching ring 10 is achieved through the cooperation between the mating pin 18 and the limiting groove 17.

[0043] In this embodiment, the connection structure between the main pump injection block 9 and the inner diameter matching ring 10 is further disclosed. By inserting the matching pin shaft 18 into the limit groove 17, the inner diameter matching ring 10 is switched from matching with the telescopic connecting rod 16 to matching with the main pump injection block 9, and performs telescopic movement synchronously with the main pump injection block 9.

[0044] Embodiment 5:

[0045] A limiting hole 19 is also provided on the outside of the outer diameter adjustment ring 7, and a plurality of telescopic limiting cylinders 20 are provided in a circular array on the box body 1 where the slurry pumping chamber 3 is located. When the outer diameter adjustment ring 7 is extended inward, the telescopic rod of the telescopic limiting cylinder 20 cooperates with the limiting hole 19 on its side.

[0046] In this embodiment, a limiting mechanism for the outer diameter adjustment ring 7 in the inwardly extended state is further disclosed, and the outer diameter adjustment ring 7 is fixed by the cooperation between the telescopic limiting cylinder 20 and the limiting hole 19 .

[0047] Embodiment 6: The box body 1 is located on one side of the crankshaft power chamber 2 and is also fixedly rotatably installed with a power crankshaft 21. The power crankshaft 21 is movably connected to the crankshaft connecting rod 22, and the crankshaft connecting rod 22 is movably connected to the telescopic shaft 12. The rotation of the power crankshaft 21 drives the telescopic shaft 12 to perform reciprocating telescopic motion.

[0048] In this embodiment, the structure inside the crankshaft power chamber 2 is further disclosed. The rotation of the power crankshaft 21 drives the crankshaft connecting rod 22 to move, and the movement of the crankshaft connecting rod 22 drives the telescopic shaft 12 to extend and retract, thereby driving the main pump injection block 9 and the inner diameter matching ring 10 connected thereto to perform synchronous telescopic movement.

[0049] A grouting system includes the above-mentioned pulse pump suitable for tunnel / tunnel grouting, including a pulse pump 27, and also includes a feeding device 23, a mixing device 24 and a stirring device 25. The feeding device 23, the mixing device 24 and the stirring device 25 are connected through a feed pipe 26. The pulse pump 27 is arranged at the rear end of the stirring device 25, and the feed pipe 5 of the pulse pump 27 is connected to the stirring device 25.

[0050] 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. A pulse pump suitable for tunnel / tunnel grouting, comprising a housing, the housing being divided into a crankshaft power chamber and a slurry pumping chamber by a partition, characterized in that: A material inlet and outlet assembly block is fixedly installed in the slurry pumping chamber, a material inlet and outlet assembly block is connected to the material inlet and outlet assembly block, and a plurality of outer diameter adjustment rings are coaxially telescopically arranged on the outer side of the material inlet and outlet assembly block; A main pump injection block is telescopically provided on one side of the inlet and outlet assembly block, and an inner diameter matching ring is provided in the box body of the main pump injection block away from the inlet and outlet assembly block, and the inner diameter matching ring is movably matched with the main pump injection block; The main pump injection block, the inlet and outlet assembly block, the outer diameter adjustment ring and the inner diameter matching ring enclose a pumping inner cylinder body. The main pump injection block cooperates with the corresponding outer diameter adjustment ring by itself or in combination with the inner diameter matching ring, thereby adjusting the volume of the pumping inner cylinder body in a step-by-step manner; Adjacent outer diameter adjustment rings are slidably fitted with each other and a sealing ring is installed on the inner wall of each outer diameter adjustment ring. The outer diameter adjustment rings are driven by an independently arranged telescopic mechanism to perform telescopic movement, and only one of the outer diameter adjustment rings is in an inwardly extended state at the same time. The sum of the number of the inner diameter matching rings and the main pump injection block is equal to the number of the outer diameter adjustment rings, the outer side surface of the main pump injection block is slidably matched with the inner side surface of the innermost outer diameter adjustment ring, and the outer side surface of the inner diameter matching ring is slidably matched with the inner side surface of the corresponding outer diameter adjustment ring; The box body is located on one side of the slurry pumping chamber and is further provided with a pair of sliding grooves arranged up and down. A sliding block is provided in the sliding groove for translational sliding. Telescopic connecting rods are fixedly installed on the upper and lower sliding blocks. The telescopic connecting rods are telescopically installed on the telescopic cylinder body. A limiting groove for inserting the telescopic connecting rod is provided through the inner diameter matching ring. The inner diameter matching ring is limited and fixed by the telescopic connecting rod extending into the limiting groove. The side of the main pump injection block is also telescopically provided with a mating pin, and the mating pin is fixedly connected to the telescopic arm of the electric telescopic cylinder arranged inside the main pump injection block. The telescopic movement of the electric telescopic cylinder drives the mating pin to perform telescopic movement synchronously. In the retracted state, the mating pin is flush with the side of the main pump injection block. In the extended state, the mating pin protrudes from the side of the main pump injection block and cooperates with the limiting groove opened on the inner side of the inner diameter matching ring. The fixed connection between the main pump injection block and the inner diameter matching ring is achieved through the cooperation of the mating pin and the limiting groove.

2. A pulse pump suitable for tunnel / tunnel grouting according to claim 1, characterized in that: The main pump injection block is also fixedly connected to a telescopic shaft on the side away from the inlet and outlet assembly blocks. The main pump injection block or its combination with the inner diameter matching ring slides horizontally during the extension and contraction of the telescopic shaft, thereby pumping the slurry from the feed pipe into the pumping inner cylinder and pumping it out from the discharge pipe.

3. A pulse pump suitable for tunnel / tunnel grouting according to claim 2, characterized in that: The telescopic mechanism that drives several outer diameter adjustment rings to perform telescopic movement is an electric hydraulic telescopic cylinder. A single outer diameter adjustment ring is connected to multiple electric hydraulic telescopic cylinders arranged in a circular array along the axis of the outer diameter adjustment ring. The electric hydraulic telescopic cylinders are fixedly mounted on the box on one side of the slurry pumping chamber.

4. A pulse pump suitable for tunnel / tunnel grouting according to claim 3, characterized in that: A limiting hole is also provided on the outside of the outer diameter adjustment ring, and a plurality of telescopic limiting cylinders are arranged in a circular array on the box where the slurry pumping chamber is located. The telescopic rods of the telescopic limiting cylinders cooperate with the limiting holes on the side of the outer diameter adjustment ring when the outer diameter adjustment ring is extended inward.

5. A pulse pump suitable for tunnel / tunnel grouting according to claim 4, characterized in that: The box body is located on one side of the crankshaft power chamber and is also fixedly rotatably mounted with a power crankshaft. The power crankshaft is movably connected to a crankshaft connecting rod, and the crankshaft connecting rod is movably connected to a telescopic shaft. The rotation of the power crankshaft drives the telescopic shaft to perform reciprocating telescopic motion.

6. A grouting system comprising a pulse pump suitable for tunnel / tunnel grouting according to any one of claims 1 to 5, characterized in that: It also includes a feeding device, a mixing device and a stirring device, which are connected through a feeding pipe. The pulse pump is arranged at the rear end of the stirring device, and the feeding pipe of the pulse pump is connected to the stirring device.

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