Rapid segmented retreating type grouting device

Abstract

The utility model discloses a rapid segmented retreating type grouting device which comprises a grouting hose and a plurality of sections of supporting sleeves, and the multiple sections of supporting sleeves are sequentially and detachably connected in the axial direction. The rear end of each supporting sleeve is provided with a large inner diameter section, and the front end of each supporting sleeve is provided with a small outer diameter section. Each supporting sleeve comprises a supporting sleeve male piece and a supporting sleeve female piece, and the supporting sleeve male piece and the supporting sleeve female piece are both semi-cylindrical shells and define a cylindrical shell; the front end of the grouting hose is used for being connected with a grouting gun head to form a grouting pipeline. The supporting sleeve is used for wrapping the grouting hose and carrying the grouting hose and the grouting gun head to be forwards and coaxially inserted into the bottom of the sleeve valve pipe; and after grouting of the section is completed, the supporting sleeve and the grouting pipeline are pulled out upwards till all grouting of all the sections of the drill hole is completed. According to the rapid segmented retreating type grouting device, through the anti-overflowing lock head and the supporting sleeve, overflowing prevention of the grouting pipeline and continuous rapid operation of grouting of all segments are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of civil engineering underground engineering technology, specifically relating to a rapid segmented retreat grouting device. Background Technology

[0002] With the continuous construction of underground engineering projects, increasingly complex geological conditions are encountered during construction, necessitating pre-grouting improvement of weak and water-rich strata. Among these methods, surface sleeve valve grouting technology is widely used due to its convenience.

[0003] However, the existing surface sleeve valve grouting process often requires workers to hold down the grouting pipe during the grouting process to prevent it from deviating from the designed grouting depth due to the reaction of the grouting pressure. In addition, during the segmented retreat grouting process, each segment of the grouting pipe needs to be dismantled and reconnected, which is time-consuming and prone to grout leakage, thus adversely affecting the grouting quality and civilized construction. Utility Model Content

[0004] The purpose of this invention is to provide a rapid segmented retractable grouting device that, through anti-overflow lock head and support sleeve, achieves anti-overflow of grouting pipeline and continuous and rapid grouting operation in each segment.

[0005] The present invention adopts the following technical solution: a rapid segmented retractable grouting device, comprising a grouting hose and multiple support sleeves, wherein the multiple support sleeves are sequentially detachably connected in the axial direction; each support sleeve has a large inner diameter section at its rear end and a small outer diameter section at its front end.

[0006] Each support sleeve includes a male support sleeve piece and a female support sleeve piece. Both the male and female support sleeve pieces are semi-cylindrical shells, which together form a cylindrical shell.

[0007] The front end of the grouting hose is used to connect to the grouting gun head to form a grouting pipeline;

[0008] The support sleeve is used to wrap the grouting hose and carries the grouting hose and grouting gun head forward coaxially into the bottom of the sleeve valve pipe. After the grouting of this section is completed, the support sleeve and grouting pipeline are pulled upward until the height of the next designed grouting section is reached. The male support sleeve piece is then pulled out along the axial direction of the support sleeve, and then the female support sleeve piece is pulled out to complete the removal of this section of the support sleeve. The support sleeve and grouting pipeline are pulled upward sequentially, and the last support sleeve piece is disassembled until all grouting of each section of the borehole is completed.

[0009] Furthermore, the upper end of the support sleeve mother plate, and the two sides, are stepped to form a groove that is higher near the edge and lower inside.

[0010] Both sides of the upper end of the male support sleeve are provided with protruding thin plates extending toward the female support sleeve. A downward retaining plate is integrally connected to the lower edge of the end of the protruding thin plate. An upward recessed groove is formed between the retaining plate and the edge of the male support sleeve. When the male support sleeve and the female support sleeve are assembled into a cylindrical shell, the retaining plate is used to retain the female support sleeve in the groove.

[0011] Furthermore, a concave limiting groove is provided on the outer wall of the upper end of both the male and female support sleeves in a semi-circular manner; a support sleeve misalignment limiting ring is coaxially sleeved in the concave limiting groove, the support sleeve misalignment limiting ring is formed by two semi-rings and is used to fix the male and female support sleeves.

[0012] Furthermore, it also includes an anti-counterfeiting lock cylinder, which includes an anti-counterfeiting lock cylinder connecting sleeve and an anti-counterfeiting lock cylinder bite cap;

[0013] The anti-counterfeiting lock head connecting sleeve is cylindrical, with its lower end coaxially sleeved on the top of the sleeve valve tube, and its upper end coaxially connected to the anti-counterfeiting lock head base. The outer contour of the anti-counterfeiting lock head base is cuboid, with a cylindrical hole in the middle, which is connected to the anti-counterfeiting lock head connecting sleeve.

[0014] The anti-counterfeiting lock head cover is composed of two semi-rectangular shells. Each semi-rectangular shell has a top cover on its upper part. Each top cover has a semi-circular opening, and the end of the semi-circular opening passes through the top cover and faces the opposite semi-rectangular shell. The two semi-circular openings are combined to form a circular opening.

[0015] The lower end of each semi-cubic shell is open. Each semi-cubic shell has a triangular plate with its tip pointing downwards integrally connected to the front and rear side plates. The tips of each triangular plate are hinged to the front and rear side walls of the anti-counterfeiting lock base. Both semi-cubic shells can rotate relative to each other or back to back to achieve enclosing or opening. When the two semi-cubic shells are enclosed, a circular hole is formed in the middle, which fits and matches the concave limiting groove at the upper end of the support sleeve to achieve temporary fixation.

[0016] Furthermore, the anti-counterfeiting lock head connecting sleeve is provided with two anti-counterfeiting lock head keys, both of which are door-shaped metal objects. Each door-shaped metal object has a vertically downward cylindrical pin at its lower left and right ends. The cylindrical pins are used to insert into the vertical openings on the upper wall of the anti-counterfeiting lock head biting cover to fix the two semi-rectangular shells on the left and right.

[0017] Furthermore, the grouting gun head includes a grouting gun head rubber plug, a grouting gun head grouting pipe, and a grouting gun head mother disc, wherein:

[0018] The rubber plug of the grouting gun head is a cylindrical rubber piston with a through hole in its vertical axis. Its outer diameter matches the inner diameter of the sleeve valve tube and is coaxially sleeved inside the sleeve valve tube to prevent the grout from flowing back to the ground along the sleeve valve tube.

[0019] The grouting gun head mother disc is a cylindrical tube with an outer diameter that matches the outer diameter of the grouting gun head rubber plug. Its inner wall is stepped, with the inner diameter of the upper section of the cylindrical tube being larger than that of the lower section. Its front end is coaxially connected to the rear end of the grouting gun head rubber plug and is coaxially fitted inside the sleeve valve tube.

[0020] The grouting gun head has a metal grouting pipe, the upper end of which is connected to the front end of the grouting hose.

[0021] The grouting nozzle's grouting pipe and grouting hose coaxially pass through the grouting nozzle's rubber plug and grouting nozzle's mother plate, with the grouting nozzle's grouting pipe extending forward out of the grouting nozzle's rubber plug.

[0022] Furthermore, the inner diameter of the upper section of the grouting gun head mother plate is consistent with the small outer diameter of the front end of the support sleeve. The small outer diameter section of the front end of the support sleeve is coaxially sleeved on the upper section of the grouting gun head mother plate to fix the front end of the support sleeve.

[0023] Furthermore, the sleeve valve pipe body is provided with multiple sleeve valve pipe overflow hole areas at intervals, and multiple sleeve valve pipe overflow holes are opened in each sleeve valve pipe overflow hole area; multiple sleeve valve pipe rubber sleeves are sleeved on the sleeve valve pipe body, and each sleeve valve pipe rubber sleeve is fitted and covers the sleeve valve pipe overflow hole area; the sleeve valve pipe rubber sleeves are used to ensure that the slurry flows out of the sleeve valve pipe body in one direction under pressure, and the slurry is injected into the formation through the sleeve valve pipe overflow hole by pushing open the sleeve valve pipe rubber sleeve.

[0024] The beneficial effects of this utility model are: 1. Grouting is performed using a grouting hose, which is supported by multiple sections of support sleeves. Each section of the support sleeve is detachably connected. After completing the grouting of the previous section, the grouting pipeline is pulled upwards to the next grouting position, and the support sleeve at the rear end is removed. This eliminates the need to disassemble the grouting hose, allowing for continuous grouting operations. 2. After grouting pressure is generated, the reaction force acts on the rubber plug of the grouting gun head, locking the anti-overflow locking head into the support pipe, avoiding manual suppression of overflow and saving labor. 3. The grouting gun head's master disc seals the grout, preventing it from flowing back to the ground along the sleeve valve pipe. Attached Figure Description

[0025] Figure 1 A schematic diagram of a rapid segmented retraction grouting device. Figure 1 ;

[0026] Figure 2 A schematic diagram of the supporting sleeve structure;

[0027] Figure 3 A schematic diagram of the structure for preventing counterfeit locks;

[0028] Figure 4 A schematic diagram of a rapid segmented retraction grouting device. Figure 2 ;

[0029] Figure 5 This is an assembly diagram of the accessories for a rapid segmented retractable grouting gun head area.

[0030] Figure 6 This is a schematic diagram of a rapid segmented retraction grouting process;

[0031] The components include: 1. Sleeve valve tube; 1-1. Sleeve valve tube body; 1-2. Sleeve valve tube rubber sleeve; 1-3. Sleeve valve tube overflow hole; 2. Grouting hose; 3. Grouting core tube; 3-1. Grouting core tube section; 3-2. Grouting core tube connecting sleeve; 3-3. Grouting core tube connector; 4. Support sleeve; 4-1. Support sleeve male piece; 4-2. Support sleeve female piece; 4-3. Support sleeve misalignment limiting ring; 5. Anti-overlap lock head; 5-1. Anti-overlap lock head connecting sleeve; 5-2. Anti-overlap lock head base; 5-3. Anti-overlap lock head bite cap; 5-4. Anti-overlap lock head key; 6. Grouting gun head; 6-1. Grouting gun head rubber plug; 6-2. Grouting gun head grouting pipe; 6-3. Grouting gun head female disc; 7. Shell material. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] This utility model discloses a rapid segmented retraction grouting device, such as... Figure 1 , 2 As shown in Figure 4, the system includes a grouting hose 2 and multiple support sleeves 4, wherein the multiple support sleeves 4 are sequentially detachably connected in the axial direction; each support sleeve 4 has a large inner diameter section at its rear end and a small outer diameter section at its front end; the grouting hose 2 is made of rubber and has a steel wire mesh inside the pipe wall, which can withstand a large grouting pressure.

[0034] Specifically, the front end of the support sleeve 4 has a 10cm outer diameter contraction section and the upper end has a 10cm inner diameter expansion section. Multiple support sleeves 4 can be fitted together end to end to form a longer support tube system.

[0035] Each support sleeve 4 includes a male support sleeve 4-1 and a female support sleeve 4-2. Both the male support sleeve 4-1 and the female support sleeve 4-2 are semi-cylindrical shells, which together form a cylindrical shell. The front end of the grouting hose 2 is used to connect with the grouting gun head 6 to form a grouting pipeline.

[0036] The support sleeve 4 is used to wrap the grouting hose 2 and carries the grouting hose 2 and the grouting gun head 6 forward coaxially into the bottom of the sleeve valve pipe 1. After the grouting of this section is completed, the support sleeve 4 and the grouting pipeline are pulled upward until the height of the next designed grouting section is reached. The male support sleeve piece 4-1 at the end is slid out along the axial direction of the support sleeve 4, and then the female support sleeve piece 4-2 is pulled out to complete the removal of this section of the support sleeve 4. The support sleeve 4 and the grouting pipeline are pulled upward in sequence, and the last support sleeve 4 is disassembled until all grouting of each section of the borehole is completed.

[0037] The upper end of the support sleeve mother plate 4-2 is stepped at both sides to form a groove that is higher near the edge and lower inside.

[0038] Both sides of the upper end of the male support sleeve plate 4-1 are provided with protruding thin plates extending toward the female support sleeve plate 4-2. A downward retaining plate is integrally connected to the lower edge of the end of the protruding thin plate. An upward concave groove is formed between the retaining plate and the edge of the male support sleeve plate 4-1. When the male support sleeve plate 4-1 and the female support sleeve plate 4-2 are assembled into a cylindrical shell, the retaining plate is used to retain the female support sleeve plate 4-2 in the groove.

[0039] Both the male support sleeve 4-1 and the female support sleeve 4-2 have concave limiting grooves circumferentially opened on their outer walls. A support sleeve misalignment limiting ring 4-3 is coaxially sleeved in the concave limiting groove. The support sleeve misalignment limiting ring 4-3 is formed by two semi-rings and is used to fix the male support sleeve 4-1 and the female support sleeve 4-2.

[0040] Both the male support sleeve plate 4-1 and the female support sleeve plate 4-2 are ferromagnetic semi-cylindrical shells. The male support sleeve plate 4-1 and the female support sleeve plate 4-2 are joined together to form a cylindrical shell. The ferromagnetism allows it to be attracted by a magnet.

[0041] The outer diameter of the cylindrical shell is smaller than the inner diameter of the sleeve valve tube 1, and the inner diameter is larger than the outer diameter of the grouting hose 2, so as to achieve a three-layer structure in which the sleeve valve tube 1 wraps around the support sleeve tube 4, and the support sleeve tube 4 wraps around the grouting hose 2.

[0042] Both the male support sleeve 4-1 and the female support sleeve 4-2 have concave limiting grooves circumferentially formed on their outer walls. A support sleeve misalignment limiting ring 4-3, composed of two semi-rings, is coaxially fitted within these grooves to secure the male support sleeve 4-1 and the female support sleeve 4-2. The two seams of the two semi-rings of the support sleeve misalignment limiting ring 4-3 do not coincide with the two seams of the male support sleeve 4-1 and the female support sleeve 4-2. At this point, the tip of the support sleeve 4 is fixed by the grouting gun head mother plate 6-3, preventing the sleeve from being opened and forming a robust annular structure.

[0043] Both the protruding sheet and the groove are cuboid in shape and have the same size to achieve a firm engagement between the male support sleeve 4-1 and the female support sleeve 4-2.

[0044] like Figure 3 As shown, it also includes an anti-counterfeiting lock head 5, which includes an anti-counterfeiting lock head connecting sleeve 5-1 and an anti-counterfeiting lock head biting cover 5-3;

[0045] The anti-counterfeiting lock head connecting sleeve 5-1 is cylindrical, with its lower end coaxially fitted onto the top of the sleeve valve tube 1, and its upper end coaxially connected to the anti-counterfeiting lock head base 5-2. The outer contour of the anti-counterfeiting lock head base 5-2 is cuboid, with a cylindrical hole in the middle that communicates with the anti-counterfeiting lock head connecting sleeve 5-1. Two rings of small holes are provided on the cylinder body, with 4 holes in each ring, 90 degrees apart, and the two rings of small holes are staggered in a quincunx arrangement. Screws can be installed through the small holes to firmly connect the anti-counterfeiting lock head 5 to the sleeve valve tube 1 as one unit.

[0046] The anti-counterfeiting lock head cover 5-3 is composed of two semi-rectangular shells. Each semi-rectangular shell has a top cover on its upper part. Each top cover has a semi-circular opening, and the end of the semi-circular opening passes through the top cover and faces the opposite semi-rectangular shell. The two semi-circular openings are combined to form a circular opening.

[0047] Each semi-cubic-pole shell has an open lower end. A triangular plate with its pointed tip is integrally connected to the front and rear side plates of each semi-cubic-pole shell. The tips of each triangular plate are hinged to the front and rear side walls of the anti-counterfeiting lock base 5-2. Both semi-cubic-pole shells can rotate relative to each other or back to back, allowing them to close or open. When the two semi-cubic-pole shells are closed, a circular hole is formed in the middle, which fits into the concave limiting groove at the upper end of the support sleeve 4. After the anti-counterfeiting lock head biting cover 5-3 bites into the support sleeve 4, the support sleeve 4 cannot move, achieving temporary fixation.

[0048] The anti-counterfeiting lock head connecting sleeve 5-1 is provided with two anti-counterfeiting lock head keys 5-4, both of which are door-shaped metal objects. Each door-shaped metal object has a vertically downward cylindrical pin at the left and right ends of its lower end. The cylindrical pin is used to insert into the vertical opening on the upper wall of the anti-counterfeiting lock head biting cover 5-3 to fix the two semi-rectangular shells on the left and right.

[0049] like Figure 5 As shown, the grouting gun head 6 includes a grouting gun head rubber plug 6-1, a grouting gun head grouting pipe 6-2, and a grouting gun head mother plate 6-3, wherein:

[0050] The grouting gun head rubber plug 6-1 is a cylindrical rubber piston with a through hole in its vertical axis. Its outer diameter matches the inner diameter of the sleeve valve tube 1 and is coaxially sleeved inside the sleeve valve tube 1 to prevent grout from flowing back to the ground along the sleeve valve tube 1.

[0051] The grouting gun head mother plate 6-3 is a cylindrical tube with an outer diameter that matches the outer diameter of the grouting gun head rubber plug 6-1. Its inner wall is stepped, with the inner diameter of the upper section of the cylindrical tube being larger than that of the lower section. Its front end is coaxially connected to the rear end of the grouting gun head rubber plug 6-1 and is coaxially sleeved inside the sleeve valve tube 1.

[0052] The grouting nozzle grouting pipe 6-2 is a metal pipe, the upper end of which is connected to the front end of the grouting hose 2;

[0053] The grouting nozzle grouting pipe 6-2 and the grouting hose 2 coaxially pass through the grouting nozzle rubber plug 6-1 and the grouting nozzle mother plate 6-3, with the grouting nozzle grouting pipe 6-2 extending forward out of the grouting nozzle rubber plug 6-1.

[0054] The inner diameter of the upper section of the grouting gun head mother plate 6-3 is consistent with the small outer diameter of the front end of the support sleeve 4. The small outer diameter section of the front end of the support sleeve 4 is coaxially sleeved on the upper section of the grouting gun head mother plate 6-3 to fix the front end of the support sleeve 4.

[0055] The sleeve valve pipe 1 includes a sleeve valve pipe body 1-1, on which multiple sleeve valve pipe overflow hole areas are spaced apart, and multiple sleeve valve pipe overflow holes 1-3 are opened in each sleeve valve pipe overflow hole area; multiple sleeve valve pipe rubber sleeves 1-2 are sleeved on the sleeve valve pipe body 1-1, and each sleeve valve pipe rubber sleeve 1-2 covers the sleeve valve pipe overflow hole area; the sleeve valve pipe rubber sleeves 1-2 are used to ensure that the slurry flows out unidirectionally from the sleeve valve pipe body 1-1 under pressure, and the slurry is injected into the formation from the sleeve valve pipe body 1-1 through the sleeve valve pipe overflow holes 1-3, pushing open the sleeve valve pipe rubber sleeves 1-2. The sleeve valve pipe body 1-1 is made of rigid PVC plastic, and the distance between two adjacent sleeve valve pipe overflow hole areas is half a meter.

[0056] The grouting method of the above-mentioned rapid segmented retraction grouting device, such as Figure 6 As shown, the grouting method includes the following steps:

[0057] Step S1: Drill a borehole to the designed depth; insert a sleeve valve pipe 1 into the borehole, with the upper end of the sleeve valve pipe 1 above the ground surface; seal the gap between the borehole wall and the sleeve valve pipe 1, especially the part near the borehole opening, with a casing material 7 to prevent grout from flowing to the ground surface. The casing material 7 is a cementitious material composed of cement, bentonite, admixtures, etc.

[0058] Step S2: Coaxially mount the anti-counterfeiting lock head connecting sleeve 5-1 onto the end of the sleeve valve pipe 1 on the ground surface and fix it.

[0059] Step S3: Connect the front end of the grouting hose 2 to the grouting nozzle grouting pipe 6-2, and coaxially sleeve it inside the connected grouting nozzle rubber plug 6-1 and grouting nozzle mother plate 6-3; the grouting hose 2 and the grouting nozzle 6 are connected to form a grouting pipeline;

[0060] And complete the installation of the front support sleeve 4;

[0061] At the upper end of the pre-installed cylindrical shell, install the support sleeves 4 in sequence and coaxially, and continuously insert the anti-overhead lock head 5 and sleeve valve pipe 1 coaxially downwards until the grouting gun head grouting pipe 6-2 is inserted into the bottom of the sleeve valve pipe 1.

[0062] Step S3 is as follows: The female support sleeve 4-2 is wrapped around the grouting hose 2, and the tip is inserted into the upper section of the grouting gun head female plate 6-3. Then, the male support sleeve 4-1 is aligned with the female support sleeve 4-2 to wrap around the grouting hose 2. At the same time, the male support sleeve 4-1 is slid along the axis so that the front end is inserted into the upper section of the grouting gun head female plate 6-3. The retaining piece is held in the groove of the female support sleeve 4-2. The male support sleeve 4-1 and the female support sleeve 4-2 form a cylindrical shell. The support sleeve misalignment ring 4-3 is embedded in the concave limiting groove.

[0063] Step S4: Rotate the two anti-counterfeiting lock caps 5-3 relative to each other and fit them together, so that their upper ends fit and match the concave limiting groove at the upper end of the support sleeve 4. Insert the anti-counterfeiting lock key 5-4 to temporarily fix the grouting pipeline.

[0064] Step S5: Start grouting. Grout is injected into sleeve valve pipe 1 through the pipeline. Through the overflow hole 1-3 of sleeve valve pipe, the rubber sleeve 1-2 of sleeve valve pipe is opened and injected into the formation. After the design grouting pressure and design grouting volume are reached, the grouting of this section is completed. The grout is injected into sleeve valve pipe 1 through the pipeline and blocked by the rubber plug 6-1 of the grouting gun head, so that no overflow will occur.

[0065] Step S6: Pull the grouting pipe upwards. When it reaches the height of the next designed grouting section, remove the uppermost support sleeve 4 and the support sleeve misalignment ring 4-3. Then, slide the male support sleeve piece 4-1 upwards along the axial direction of the support sleeve 4 to disengage it from the female support sleeve piece 4-2, so that its tip and upper end are simultaneously released from restraint. Then, pull out the female support sleeve piece 4-2 to complete the removal of this section of the support sleeve; and fix the anti-overlapping lock head 5 again.

[0066] Step S7: Repeat the grouting in step S5 to complete the grouting of this section.

[0067] Step S8: Repeat steps S6-S7 until all sections of this borehole have been grouted. Turn off the grouting machine, remove the grouting gun head 6, and directly flush the grouting hose 2 and grouting gun head 6 with water through the grouting machine. The support sleeve 4 does not require cleaning. Repeat steps S1-S6 to complete the grouting work for the next borehole.

Claims

1. A rapid segmental back-off type grouting device, characterized by, The utility model provides a kind of injection grouting pipe, including grouting hose (2) and multi-section support sleeve (4), wherein, multi-section the support sleeve (4) is sequentially detachably connected in axial direction;The rear end of each support sleeve (4) has a section of large inner diameter section, and the front end has a section of small outer diameter section; Each support sleeve (4) includes support sleeve male piece (4-1) and support sleeve female piece (4-2), and the support sleeve male piece (4-1) and support sleeve female piece (4-2) are both half cylindrical shells, and are enclosed into a cylindrical shell; The front end of the grouting hose (2) is used to be connected with grouting gun head (6), and grouting pipeline is formed.

2. The rapid segmented backoff grouting device of claim 1, wherein, The upper end of the support sleeve female piece (4-2) is stepped at both edges, to form a groove with high side near the edge and low inside; The upper edge of the upper end of the support sleeve male piece (4-1) is provided with a protruding sheet extending towards the support sleeve female piece (4-2), and the lower edge of the end of the protruding sheet is integrally connected with a downward clamping sheet, and the clamping sheet and the edge of the support sleeve male piece (4-1) form a concave groove upward, and the clamping sheet is used to be clamped in the groove of the support sleeve female piece (4-2) when the support sleeve male piece (4-1) and the support sleeve female piece (4-2) are enclosed into a cylindrical shell.

3. A rapid segmented backoff grouting device as claimed in claim 2, characterized in that, The outer wall of the upper end of the support sleeve male piece (4-1) and the support sleeve female piece (4-2) is provided with a concave limiting groove in half circle, and a support sleeve limiting error ring (4-3) is coaxially sleeved in the concave limiting groove, the support sleeve limiting error ring (4-3) is enclosed by two half rings, and is used to fix the support sleeve male piece (4-1) and the support sleeve female piece (4-2).

4. The rapid segmented backoff grouting device of claim 3, wherein, It also includes an anti-bubble lock head (5), and the anti-bubble lock head (5) includes an anti-bubble lock head connecting sleeve (5-1) and an anti-bubble lock head cover (5-3). The anti-bubble lock head connecting sleeve (5-1) is cylindrical, and the lower end is coaxially sleeved on the top end of the sleeve valve pipe (1), and the upper end is coaxially connected with an anti-bubble lock head base (5-2), the anti-bubble lock head base (5-2) is a cuboid in outer contour, and has a cylindrical hole in the middle, which is communicated with the anti-bubble lock head connecting sleeve (5-1); The anti-bubble lock head cover (5-3) is enclosed by two half cuboid shells, and each half cuboid shell is provided with a top cover, and a semicircular opening is formed in each top cover, and the semicircular opening end penetrates the top cover and faces the opposite half cuboid shell, and two semicircular openings are enclosed into a circular opening. The lower end of each half cuboid shell is open, and a triangular plate body with a sharp end downward is integrally connected on the front and rear side plates of each half cuboid shell, and the sharp end of each triangular plate body is hingedly connected to the front and rear side walls of the anti-bubble lock head base (5-2), and the two half cuboid shells can be relatively rotated or back to each other, so that the two half cuboid shells are enclosed or opened, and when the two half cuboid shells are enclosed, a circular hole is formed in the middle, which is matched with the concave limiting groove of the upper end of the support sleeve (4), so as to realize temporary fixing.

5. A rapid segmented backoff grouting device as claimed in claim 4, characterized in that, The anti-locking head connection sleeve (5-1) is provided with anti-locking head lock keys (5-4), which are two and are both door-shaped metal objects, and each door-shaped metal object is provided with vertical downward cylindrical pins at the left and right ends of the lower end, which are used for inserting into the vertical openings in the upper wall of the anti-locking head cover (5-3) and fixing the left and right two half-rectangular cylindrical shells.

6. A rapid segmented backoff grouting device as claimed in claim 5, characterized in that, The grouting gun head (6) comprises a grouting gun head rubber plug (6-1), a grouting gun head grouting pipe (6-2) and a grouting gun head female disc (6-3), wherein: The grouting gun head rubber plug (6-1) is a cylindrical rubber piston, which is provided with a through hole in the vertical axial direction, and the outer diameter thereof matches the inner diameter of the sleeve valve pipe (1), and is coaxially sleeved in the sleeve valve pipe (1) to prevent the slurry from flowing back to the ground along the sleeve valve pipe (1); The grouting gun head female disc (6-3) is a cylindrical pipe, the outer diameter of which is consistent with the outer diameter of the grouting gun head rubber plug (6-1), and the inner wall thereof is stepped, the inner diameter of the upper segment of the cylindrical pipe being larger than that of the lower segment; the front end thereof is coaxially connected with the rear end of the grouting gun head rubber plug (6-1) and is coaxially sleeved in the sleeve valve pipe (1); The grouting gun head grouting pipe (6-2) is a metal pipe, the upper end of which is connected with the front end of the grouting hose (2); The grouting gun head grouting pipe (6-2) and the grouting hose (2) are coaxially inserted through the grouting gun head rubber plug (6-1) and the grouting gun head female disc (6-3), and the grouting gun head grouting pipe (6-2) is forwardly inserted out of the grouting gun head rubber plug (6-1).

7. A rapid segmented backoff grouting device as claimed in claim 6, characterized in that, The inner diameter of the upper segment of the grouting gun head female disc (6-3) is consistent with the front end small outer diameter of the support sleeve pipe (4), and the front end small outer diameter segment of the support sleeve pipe (4) is coaxially sleeved in the upper segment of the grouting gun head female disc (6-3) to fix the front end of the support sleeve pipe (4).

8. A rapid segmented backoff grouting device as claimed in claim 7, characterized in that, The sleeve valve pipe (1) comprises a sleeve valve pipe body (1-1), a plurality of sleeve valve pipe overflow hole regions are arranged on the sleeve valve pipe body (1-1) at intervals, and a plurality of sleeve valve pipe overflow holes (1-3) are arranged in each sleeve valve pipe overflow hole region; a plurality of sleeve valve pipe rubber sleeves (1-2) are coaxially sleeved on the sleeve valve pipe body (1-1), and each sleeve valve pipe rubber sleeve (1-2) is sleeved and covers the sleeve valve pipe overflow hole region; the sleeve valve pipe rubber sleeve (1-2) is used for ensuring that the slurry flows out of the sleeve valve pipe body (1-1) in one direction under the action of pressure, and the slurry flows out of the sleeve valve pipe body (1-1) through the sleeve valve pipe overflow hole (1-3) to open the sleeve valve pipe rubber sleeve (1-2) and inject into the stratum.

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