CN213807562U

CN213807562U - Air-injection grouting swivel joint

Info

Publication number: CN213807562U
Application number: CN202022692212.4U
Authority: CN
Inventors: 李桥; 牛国宾
Original assignee: Shijiazhuang Hongqiao Machinery Manufacturing Co ltd
Current assignee: Shijiazhuang Hongqiao Machinery Manufacturing Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-27
Anticipated expiration: 2030-11-19

Abstract

The application relates to the field of high-pressure rotary jet grouting equipment, in particular to an air injection grouting rotary joint which comprises a main shaft and an outer barrel with openings at two ends, wherein the outer barrel is sleeved on the main shaft and is rotationally connected with the outer barrel, a circumferential accommodating groove is formed in the bottom end of the outer barrel along the side wall of the inner ring of the outer barrel, a sealing element is arranged in the accommodating groove, one side of the sealing element is attached to the inner wall of the accommodating groove, and the opposite side wall of the other side of the sealing element is attached to the outer wall of the main shaft; the bottom end of the outer barrel is detachably connected with a lower sealing component, the lower sealing component is sleeved on the main shaft, and the inner ring of the lower sealing component is matched with the main shaft, so that the main shaft can rotate in the inner ring of the lower sealing component. This application has the effect that improves the efficiency of construction.

Description

Air-injection grouting swivel joint

Technical Field

The application relates to the field of high-pressure jet grouting equipment, in particular to a rotary joint for air injection and grouting.

Background

At present, high-pressure jet grouting is that a drilling machine is used for drilling a grouting pipe with a nozzle to a preset depth of a soil layer, then slurry or water is jetted from the nozzle at the pressure of 20-40 MPa to form jet flow impact to destroy the soil layer, and when the energy is high, the speed is high, and the dynamic pressure of the artery-shaped jet flow is greater than the structural strength of the soil layer, soil particles are peeled off from the soil layer. Some fine grains are made to emerge from ground along with slurry or water, and the rest of soil grains are mixed with slurry under the action of jet impact, centrifugal force, gravity, etc. and regularly rearranged according to certain slurry-soil ratio and mass, so that after the slurry is solidified, a solidified body is formed in soil layer.

The grouting pipe at the power end is communicated with the top end of the main shaft on the joint, and the main shaft is hollow and used for circulating concrete discharged by the grouting pipe; the lower end of the main shaft is communicated with a drilling tool, and the main shaft is in running fit in the joint main body; other fluid media are injected into the side wall of the joint main body, but other media are often leaked and flow out at the joint of the two ends of the joint and the side wall of the main shaft during working, so that the pressure of the injected media is reduced, and the efficiency of efficiency construction is reduced.

With respect to the related art among the above, the inventors consider that there is a drawback that the leakage of the medium pressure lowers the construction efficiency.

SUMMERY OF THE UTILITY MODEL

In order to improve the efficiency of construction, this application provides a slip casting rotary joint.

The application provides a slip casting rotary joint adopts following technical scheme:

a rotary joint for air injection and grouting comprises a main shaft and an outer barrel with openings at two ends, wherein the outer barrel is sleeved on the main shaft and is rotatably connected with the outer barrel; the bottom end of the outer barrel is detachably connected with a lower sealing component, the lower sealing component is sleeved on the main shaft, and the inner ring of the lower sealing component is matched with the main shaft, so that the main shaft can rotate in the inner ring of the lower sealing component.

Through adopting above-mentioned technical scheme, the outer wall of sealing member laminating main shaft can reduce the leakage quantity of injecting the medium into the main shaft lateral wall through the urceolus lateral wall for the medium pressure that makes output to the bottom drill bit is stable when injecting the medium and can obtain effective utilization, has improved the efficiency of construction.

Optionally, the lower sealing assembly comprises a lower sealing pressure plate and a lower pressure cover, the lower pressure cover is sleeved on the main shaft, the end wall of the lower pressure cover is connected with the end face of the bottom of the outer cylinder through a bolt, the diameter of the inner ring of the lower pressure cover is larger than that of the main shaft, and the diameter of the inner ring of the lower pressure cover is the same as that of the accommodating groove; the lower sealing pressure plate is also sleeved on the main shaft, and the inner ring of the lower sealing pressure plate is matched with the main shaft.

Through adopting above-mentioned technical scheme, the lower extreme of lower seal pressure disk and urceolus is sealing connection not, and the lower pressure cap can be dismantled with the lower extreme of lower seal pressure disk and be connected, and easy to assemble simultaneously is conveniently dismantled to convenient the dismantlement, has strengthened seal assembly's convenience.

Optionally, a slurry inlet is formed in the side wall of the main shaft, and a grouting hole is formed in a corresponding position on the side wall of the outer cylinder; the main shaft is located and still has seted up out the thick liquid mouth on the lower part lateral wall of lower seal assembly, and the thick liquid mouth feeds through with advancing thick liquid mouth in main shaft lateral wall inside, and the diameter of injected hole is not more than the diameter of advancing thick liquid mouth.

Through adopting above-mentioned technical scheme, pour into the thick liquid in the thick liquid mouth into to main epaxial outside the urceolus through the slip casting hole, the diameter of slip casting hole is not more than into the diameter of thick liquid mouth, has reduced the slip casting hole and has been greater than the probability that the thick liquid that advances thick liquid outflow that the thick liquid mouth leads to, has strengthened the practicality of slip casting mouth.

Optionally, the side wall of the spindle is provided with an air inlet, and a corresponding position on the side wall of the outer cylinder is provided with an air injection hole; the side wall of the lower part of the main shaft positioned on the lower sealing component is also provided with an air outlet, and the air outlet and the slurry inlet are communicated in the side wall of the main shaft; the height of the air inlet is lower than that of the pulp inlet.

Through adopting above-mentioned technical scheme, through gas injection mouth at the outer wall of outer cylinder to locating the air inlet injection gas on the main shaft, the height of air inlet is less than the height of advancing the thick liquid mouth, has reduced air inlet and air intake probability of mutual interference when the injected medium, has strengthened the stability when injecting the medium.

Optionally, two rolling bearings are embedded in the outer barrel, the two rolling bearings are coaxially arranged, and inner rings of the two rolling bearings are in interference fit with the main shaft.

By adopting the technical scheme, the rotating connection of the main shaft and the outer barrel is more stable by the rotating bearing, the friction force between the main shaft and the inner wall of the outer barrel during rotation is reduced, and the stability of the main shaft during rotation is enhanced.

Optionally, a wear-resistant sealing gasket is arranged between the two rotating bearings and arranged between the slurry inlet and the air inlet, the wear-resistant sealing gasket is horizontally and fixedly arranged on the inner wall of the outer barrel, and an inner ring of the wear-resistant sealing gasket is matched with the main shaft.

Through adopting above-mentioned technical scheme, the probability that the thick liquid of the thick liquid mouth department that advances of top reveals to the below can be reduced to wear-resisting sealed pad, also can reduce the probability that the gas of the air inlet department of below reveals to the top simultaneously, has strengthened the inside sealing performance of urceolus, and wear-resisting sealed pad still has wear-resisting characteristic simultaneously, can increase its life, reduces the frequency of changing.

Optionally, the top end of the main shaft is fixedly provided with an upper connecting flange connected with the grouting pipe, and the lower end of the main shaft is fixedly provided with an output flange connected with the drilling tool.

Through adopting above-mentioned technical scheme, through last flange joint slip casting pipe, through output flange joint drilling tool, the flange is for dismantling the connection for the dismantlement installation that connects is more convenient, has strengthened the convenience and the practicality that connect.

Optionally, the number of the slurry inlets and the number of the air inlets are at least three, and the slurry inlets and the air inlets are arranged on the side wall of the main shaft in a staggered manner.

Through adopting above-mentioned technical scheme, advance thick liquid mouth and air inlet and all be provided with threely at least, can make the efficiency of slip casting and gas injection obtain improving, crisscross setting can make full use of main shaft lateral wall's space simultaneously, has improved the efficiency of construction.

Optionally, the seal is a compression packing.

By adopting the technical scheme, the compression packing has good liquid sealing performance, low price and simple processing, enhances the sealing reliability and reduces the cost.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sealing element is attached to the outer wall of the main shaft, so that the leakage amount of the injected medium into the side wall of the main shaft through the side wall of the outer barrel can be reduced, the injected medium can be effectively utilized, and the pressure stability of the medium is kept; the construction efficiency is improved;

2. the grout is injected into the grout inlet on the main shaft from the outside of the outer barrel through the grout injection hole, the diameter of the grout injection hole is not more than that of the grout inlet, the probability of grout outflow caused by the fact that the grout injection hole is larger than the grout inlet is reduced, and the practicability of the grout injection hole is enhanced;

3. the compression packing has good liquid sealing performance, low price and simple processing, enhances the sealing reliability and reduces the cost.

Drawings

FIG. 1 is a schematic longitudinal cross-sectional view of a joint in the example of the present application in operation;

fig. 2 is a schematic transverse cross-sectional view of a joint in the example of the present application in operation.

Description of reference numerals: 1. an outer cylinder; 11. a containing groove; 12. fixing grooves; 13. a grouting port; 14. a gas injection port; 15. a wear-resistant sealing gasket; 2. a main shaft; 21. a pulp inlet; 22. a pulp outlet; 23. an air inlet; 24. an air outlet; 3. a lower closure assembly; 31. a lower gland; 32. a lower seal platen; 4. an upper closure assembly; 41. a gland is arranged; 42. a lower seal platen; 5. a rotating bearing; 6. a seal member; 7. an upper connecting flange; 8. and an output flange.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a wind-injection grouting swivel joint, which comprises a main shaft 2 and an outer cylinder 1 with openings at two ends, wherein the outer cylinder 1 is sleeved on the main shaft 2, and an inner ring of the outer cylinder 1 is matched with the main shaft 2; two identical rotating bearings 5 are arranged inside the outer barrel 1, and the main shaft 2 can rotate relative to the outer barrel 1 through interference fit of the main shaft 2 and the inner rings of the rotating bearings 5. The side wall of the main shaft 2 is provided with a slurry inlet 21 and an air inlet 23, and the corresponding position of the outer cylinder 1 is respectively provided with a grouting hole and an air injection hole which are communicated with the inside and the outside of the outer cylinder 1. The bottom of the outer cylinder 1 is provided with a circumferential accommodating groove 11 along the inner ring side wall of the outer cylinder 1, and the accommodating groove 11 is communicated to the lower end face of the outer cylinder 1 and the inner ring side wall of the outer cylinder 1; the solute slot is internally provided with a circular ring-shaped sealing element 6 which is matched with the containing slot 11, the lower end of the outer barrel 1 is detachably connected with a lower sealing component 3, the lower sealing component 3 is sleeved on the main shaft 2, and the inner ring of the lower sealing component 3 is matched with the main shaft 2 to enable the main shaft 2 to rotate. When grouting is performed to the grout inlet 21 on the main shaft 2 through the grouting hole on the outer cylinder 1 and gas is injected to the gas inlet 23 on the main shaft 2 through the gas injection hole, the sealing element 6 can reduce the probability of leakage of grout and gas at the joint of the lower end of the outer cylinder 1 and the main shaft 2, the utilization rate of grout and gas is increased, meanwhile, the pressure of grout and gas output to a drill bit can be kept stable, and the construction efficiency is improved.

Referring to fig. 1, the lower sealing assembly 3 includes a lower sealing pressure plate 4232 and a lower pressure cover 31, the lower pressure cover 31 is sleeved on the main shaft 2, the outer diameter of the lower pressure cover 31 is the same as the diameter of the outer cylinder 1, and the diameter of the inner ring of the lower pressure cover 31 is the same as the diameter of the outer edge of the accommodating groove 11; the lower gland 31 is connected with the bottom end surface of the outer cylinder 1 through bolts. The sealing element 6 is bonded in the accommodating groove 11, the sealing element 6 is a compression packing, one side of the sealing element 6 simultaneously props against the side wall of the accommodating groove 11 and the inner ring side wall of the lower pressing cover 31, and the other side of the sealing element 6 is attached to the outer wall of the main shaft 2. The lower sealing pressure plate 4232 is in a circular truncated cone shape, the lower sealing pressure plate 4232 is sleeved on the main shaft 2 and is coaxially arranged with the main shaft 2, the diameter of an inner ring of the lower sealing pressure plate 4232 is matched with that of the main shaft 2, the narrow end of the lower sealing pressure plate 4232 is in inserted fit with the inner ring of the lower pressure cover 31, and the narrow end face of the lower sealing pressure plate 4232 abuts against a compression packing to fix the compression packing; the outer diameter of the lower seal pressure plate 4232 is smaller than the diameter of the lower gland 31, and the lower seal pressure plate 4232 is connected with the lower gland 31 through bolts.

Referring to fig. 1, the top end of the outer cylinder 1 is provided with an upper sealing component 4 which is the same as the lower sealing component 3, the corresponding positions of the top of the outer cylinder 1 are provided with the same accommodating grooves 11 and sealing elements 6, and the two accommodating grooves 11 are arranged in a mirror image mode about the horizontal center line of the outer cylinder 1; the lower closure assembly 3 and the upper closure assembly 4 are also arranged in mirror image about the horizontal centre line of the outer barrel 1. The upper sealing component 4 is matched with the sealing element 6, so that the probability that the medium injected into the main shaft 2 from the side wall of the outer cylinder 1 leaks from the joint of the main shaft 2 and the top end of the outer cylinder 1 is reduced; the lower sealing component 3 is matched with the sealing element 6, so that the probability that the medium injected into the main shaft 2 from the side wall of the outer barrel 1 leaks from the connecting part of the main shaft 2 and the bottom of the outer barrel 1 is reduced.

Referring to fig. 1 and 2, an air inlet 23 is formed on the side wall of the main shaft 2, an air injection port 14 is formed at a corresponding position on the side wall of the outer cylinder 1, the air injection port 14 is communicated with the inside and the outside of the outer cylinder 1, and the diameter of the air injection port 14 is not larger than that of the air inlet 23; a grout inlet 21 is also formed in the side wall of the main shaft 2, a grouting opening 13 is also formed in the corresponding position of the side wall of the outer barrel 1, and the grouting opening 13 is communicated with the inside and the outside of the outer barrel 1; the diameter of the grouting opening 13 is not more than that of the grout inlet 21; the slurry inlet 21 is disposed higher than the air inlet 23. The side wall of the main cylinder is also provided with an air outlet 24 and a slurry outlet 22, and the air outlet 24 and the slurry outlet 22 are both arranged at the position of the main shaft 2 at the lower part of the closed component; the air outlet 24 and the air inlet 23 are vertically communicated in the side wall of the main shaft 2, and the slurry outlet 22 and the slurry inlet 21 are also vertically communicated in the side wall of the main shaft 2. Three sets of air inlets 23 and air outlets 24 are arranged, three sets of slurry inlets 21 and slurry outlets 22 are also arranged, and the air inlets 23 and the slurry inlets 21 are staggered and arranged at equal intervals along the circumferential direction of the main shaft 2.

Referring to fig. 1, two rotating bearings 5 are embedded in the side wall of the inner ring of the outer cylinder 1, the two rotating bearings 5 are coaxially arranged, and the inner ring of the rotating bearing 5 is in interference fit with the main shaft 2; the air inlet 23 and the slurry inlet 21 are both located between the two rotational bearings 5. A circular wear-resistant sealing gasket 15 is horizontally arranged on the side wall of the inner ring of the outer cylinder 1, the wear-resistant sealing gasket 15 is a steckel seal, a circumferential fixing groove 12 is formed in the side wall of the outer cylinder 1, the outer ring of the wear-resistant sealing gasket 15 is clamped in the fixing groove 12, and the inner ring of the wear-resistant sealing gasket 15 is matched with the spindle 2 in the direction so that the spindle 2 can rotate; the wear-resistant sealing gasket 15 is arranged between the air inlet 23 and the slurry inlet 21. The steiner seal is good in sealing and high-pressure resistant, and can reduce the slurry leaked from the slurry inlet 21 to flow into the bottom; and the gas leaked from the gas inlet 23 can be reduced from flowing into the upper part of the outer tube 1.

The implementation principle of the air injection and grouting swivel joint in the embodiment of the application is as follows: when the grouting device is used, a grouting hole in the side wall of the outer barrel 1 is communicated with an external high-pressure slurry pump, slurry enters the slurry inlet 21 through the grouting hole and then enters the side wall of the main barrel, then vertically flows to the corresponding slurry outlet 22 downwards, the slurry outlet 22 is communicated with a drilling tool, and then the slurry flows into the drilling tool from the slurry outlet 22 to be sprayed. The air injection hole on the lateral wall of the outer cylinder 1 is communicated with an external air compressor, air enters the air inlet 23 through the air injection hole and then enters the lateral wall of the main cylinder, then the air vertically moves to the air outlet 24 corresponding to the west, the air outlet 24 is also communicated with the drilling tool, and then the air flows into the drilling tool from the grout outlet 22 and is sprayed during drilling. The sealing member 6 contradicts the lateral wall of storage tank 11, the lateral wall of lower gland 31 and the lateral wall of laminating main shaft 2, can reduce the air inlet 23 and the leakage amount of advancing thick liquid mouth 21 when advancing thick liquid and admitting air on the main shaft 2 in the 1 inner circle of urceolus, and sealing member 6 also can reduce the external gas and get into 1 inner circle of urceolus simultaneously, has kept the stability of pressure in the 1 inner circle of urceolus, also makes the thick liquid of output to the drill bit and gaseous pressure remain stable, has promoted the efficiency of construction. The upper sealing component 4 can play the same role as the lower sealing component 3, and the sealing capability of the joint of the outer cylinder 1 and the main shaft 2 is further improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a slip casting rotary joint, includes main shaft (2) and both ends open-ended urceolus (1), urceolus (1) cover is established on main shaft (2), and main shaft (2) rotate with urceolus (1) and be connected its characterized in that: the bottom end of the outer barrel (1) is provided with a circumferential accommodating groove (11) along the side wall of the inner ring of the outer barrel (1), the accommodating groove (11) is provided with a sealing element (6), one side of the sealing element (6) is attached to the inner wall of the accommodating groove (11), and the opposite side wall of the other side of the sealing element (6) is attached to the outer wall of the main shaft (2); the bottom end of the outer barrel (1) is detachably connected with a lower sealing component (3), the lower sealing component (3) is sleeved on the main shaft (2), and the inner ring of the lower sealing component (3) is matched with the main shaft (2) so that the main shaft (2) can rotate in the inner ring of the lower sealing component (3).

2. The air injection grouting swivel joint of claim 1, wherein: the lower sealing assembly (3) comprises lower sealing pressure plates (42) (32) and a lower pressure cover (31), the lower pressure cover (31) is sleeved on the main shaft (2), the end wall of the lower pressure cover (31) is in bolt connection with the end face of the bottom of the outer cylinder (1), the diameter of the inner ring of the lower pressure cover (31) is larger than that of the main shaft (2), and the diameter of the inner ring of the lower pressure cover (31) is the same as that of the accommodating groove (11); the lower sealing pressure plates (42) and (32) are also sleeved on the main shaft (2), and the inner rings of the lower sealing pressure plates (42) and (32) are matched with the main shaft (2).

3. The air injection grouting swivel joint of claim 1, wherein: a grout inlet (21) is formed in the side wall of the main shaft (2), and a grouting hole is formed in the corresponding position on the side wall of the outer barrel (1); the main shaft (2) is positioned on the side wall of the lower part of the lower sealing component (3) and is also provided with a slurry outlet (22), the slurry outlet (22) and the slurry inlet (21) are communicated inside the side wall of the main shaft (2), and the diameter of the grouting hole is not more than that of the slurry inlet (21).

4. A wind-grouting swivel joint as claimed in claim 3, wherein: the side wall of the main shaft (2) is provided with an air inlet (23), and the corresponding position on the side wall of the outer cylinder (1) is provided with an air injection hole; the side wall of the lower part of the main shaft (2) positioned on the lower closed component (3) is also provided with an air outlet (24), and the air outlet (24) is communicated with the slurry inlet (21) inside the side wall of the main shaft (2); the height of the air inlet (23) is lower than that of the pulp inlet (21).

5. The air injection grouting swivel joint of claim 1, wherein: the inner portion of the outer barrel (1) is embedded with two rotating bearings (5), the two rotating bearings (5) are coaxially arranged, and inner rings of the two rotating bearings (5) are in interference fit with the main shaft (2).

6. The air injection grouting swivel joint of claim 5, wherein: be equipped with wear-resisting sealed pad (15) between two rolling bearing (5), and wear-resisting sealed pad (15) are located and are advanced thick liquid mouth (21) and air inlet (23) between, and wear-resisting sealed pad (15) level sets firmly on the inner wall of urceolus (1), and the inner circle of wear-resisting sealed pad (15) cooperatees with main shaft (2).

7. The air injection grouting swivel joint of claim 1, wherein: the top end of the main shaft (2) is fixedly provided with an upper connecting flange (7) connected with a grouting pipe, and the lower end of the main shaft (2) is fixedly provided with an output flange (8) connected with a drilling tool.

8. The air injection grouting swivel joint of claim 4, wherein: the slurry inlet (21) and the air inlet (23) are at least arranged on the side wall of the main shaft (2), and the slurry inlet (21) and the air inlet (23) are arranged on the side wall of the main shaft (2) in a staggered mode.

9. The air injection grouting swivel joint of claim 1, wherein: the sealing element (6) is a compression packing.