CN218710026U - Concrete sprays maintenance frame - Google Patents

Abstract

The invention discloses a concrete spraying maintenance frame which comprises a frame body, wherein the frame body comprises a plurality of telescopic pipes, each telescopic pipe comprises a first pipe body, two second pipe bodies are respectively inserted into two ends of the first pipe body, one end, far away from the first pipe body, of each second pipe body is detachably connected with a flexible pipe, the flexibility of each flexible pipe can be changed randomly, the flexible pipe is detachably connected with the corresponding second pipe body, two ends of each flexible pipe are fixedly connected with a connecting pipe, the connecting pipes are communicated with the flexible pipes, the outer pipe walls of the connecting pipes are fixedly connected with a circle of flexible waterproof sealing pipes, and the sealing pipes are tightly abutted against the inner pipe walls of the second pipe bodies; the pipe wall of the first pipe body is provided with a communication opening, the communication opening is fixedly and hermetically connected with an inlet pipe, the inlet pipe is communicated with the first pipe body, one end, far away from the first pipe body, of the inlet pipe is a water inlet, and the side pipe wall of the first pipe body and the side pipe wall of the second pipe body are both provided with a spraying opening along the length direction of the side pipe wall.

Description

Concrete sprays maintenance frame

Technical Field

The invention relates to the field of concrete curing, in particular to a concrete spraying curing frame.

Background

At present, in the concrete natural curing in-process of stand, after the stand form removal, can carry out the moist maintenance to the stand, generally utilize plastic film to let the surface package of stand let the concrete slowly condense among the prior art, but the reinforcing bar head can generally all be reserved at the top of stand, and plastic film can't cover, and the top that needs to guarantee the stand is in a moist state always in order to prevent that the concrete at stand top from appearing the crack this moment. In the prior art, generally, a water pipe is connected with a water pump to lead water flow to the top of an upright post, a plurality of water pipes matched with the water pump are selected according to the shape of the top of the upright post and are fixedly connected, so that a frame structure matched with the shape and the size of the top of the upright post is formed, the frame is installed at the top of the upright post, a plurality of small holes are punched on the pipe wall of the frame facing the center of the top of the upright post, and the frame is connected with the water pipe, so that the water flow continuously flows out of the small holes in the frame. On the job site, according to the design of building, the size at the top of stand is different respectively, leads to the stand of the different shape need make not the frame of equidimension with the top of adaptation stand, prevents to appear the crack because of the unable top that covers the stand of water that flows in the frame leads to the top of stand to appear.

In view of the above-mentioned related technologies, the inventor believes that when there are too many columns of different specifications on a construction site, adaptive frames need to be manufactured one by one according to different columns, so that the maintenance process is very complicated, and therefore there is room for improvement.

Disclosure of Invention

In order to further improve the problem that concrete curing technology is complicated, the application provides a concrete spraying curing frame.

The application provides a concrete sprays maintenance frame adopts following technical scheme:

a concrete spraying maintenance frame comprises a frame body, wherein the frame body comprises a plurality of telescopic pipes, each telescopic pipe comprises a first pipe body, two second pipe bodies are respectively inserted into two ends of the first pipe body, an annular flexible waterproof first sealing ring is fixedly connected onto an outer pipe wall of one end, inserted into the first pipe body, of each second pipe body, the first sealing ring and the second pipe bodies share the same axis, the inner pipe wall of the first pipe body is tightly abutted to the outer peripheral wall of the sealing ring, one end, far away from the first pipe body, of each second pipe body is detachably connected with a flexible pipe capable of randomly changing the curvature, the flexible pipe is detachably connected with the second pipe bodies, connecting pipes are fixedly connected to two ends of the flexible pipe and communicated with the flexible pipe, a circle of flexible waterproof sealing pipe in a circular pipe shape is fixedly connected onto the outer pipe wall of each connecting pipe, and the sealing pipe is tightly abutted to the inner pipe walls of the second pipe bodies; the pipe wall of the first pipe body is provided with a communication port, the communication port is fixedly and hermetically connected with an inlet pipe, the inlet pipe is communicated with the first pipe body, one end of the inlet pipe, far away from the first pipe body, is a water inlet, and the side pipe wall of the first pipe body and the side pipe wall of the second pipe body are both provided with spraying ports along the length direction of the side pipe wall.

By adopting the technical scheme, the outer pipe wall of the first sealing ring and the outer pipe wall of the second pipe body are fixedly connected, the inner pipe wall of the first pipe body can be tightly supported through the first sealing ring, when the length of the telescopic pipe is adjusted, the telescopic pipe cannot leak water from the joint of the first pipe body and the second pipe body, the inner pipe wall of the second pipe body can be tightly supported through the sealing pipe, when the flexible pipe is connected with the second pipe body, the connection of the flexible pipe and the second pipe body can be realized only by inserting the sealing pipe into the second pipe body through the connecting pipe, meanwhile, the joint of the flexible pipe and the second pipe body cannot leak water, the length of the telescopic pipe can be adjusted, the flexibility can be randomly changed through the flexible pipe, when the maintenance frame is installed, the flexible pipe and the second pipe body can be connected one by one-to-one around the steel bar pile, meanwhile, the maintenance frame is bound on the steel bar pile by utilizing a steel wire or a rope, the first pipe body and the second pipe body are rotated to enable the spraying port to face the center of the top end of the stand column, the cross section of the maintenance frame is an arbitrary polygon, the size of the stand column can be adjusted according to the size of the cross section of the maintenance frame, and the applicability of the maintenance frame is improved.

Preferably, the water inlet pipe is a round pipe, and a sealing cover capable of closing and opening the water inlet is detachably connected to the water inlet pipe.

Through adopting above-mentioned technical scheme, can lead to the closing cap that closes the water inlet through can dismantling on the oral siphon for when the maintenance frame is when the ordinary concrete of maintenance, only need with water piping connection framework on the water inlet can, when maintenance frame maintenance bulky concrete, all open and connect the water pipe with the water inlet in the framework, make the rivers spraying amount increase of framework, can play a cooling effect well, improved the suitability of maintenance frame.

Preferably, the closing cap is cask form, the inboard fixedly connected with of bottom plate of closing cap sealed piece of round platform form, the diameter of the one end that sealed piece and closing cap are connected is greater than the one end that the bottom of closing cap was kept away from to sealed piece, the diameter of the one end that sealed piece and closing cap are connected is greater than the pipe diameter of oral siphon.

Through adopting above-mentioned technical scheme, the diameter of the one end of being connected through sealed piece and closing cap is greater than the one end that the bottom of closing cap was kept away from to sealed piece, and the diameter of the one end of being connected through sealed piece and closing cap is greater than the pipe diameter of water inlet for the connection and the separation of closing cap and oral siphon only need can realize through simple plug mode.

Preferably, the spraying opening is in the shape of a shower head.

Through adopting above-mentioned technical scheme, be gondola water faucet through the sprinkler opening and describe for the rivers that the maintenance frame sprayed are more even fine and smooth, make the maintenance frame evenly cover the top of stand better.

Preferably, the outer plate surface of the bottom plate of the sealing cover is fixedly connected with a connecting rope, one end of the connecting rope, far away from the sealing cover, is fixedly connected with a connecting ring, and the connecting ring is sleeved on the telescopic pipe.

Through adopting above-mentioned technical scheme, through the cooperation that utilizes to connect the ring and connect the rope for even the closing cap has broken away from and can hang on the maintenance frame after the water inlet, makes the closing cap conveniently accomodate, has improved the convenience in use of closing cap.

Preferably, the telescopic pipe is further sleeved with a fixing ring for fixing the maintenance frame.

Through adopting above-mentioned technical scheme, through connect solid fixed ring on flexible pipe for when the framework wants to fix, only need with solid fixed ring cover in the framework on the reinforced pile that the stand top was reserved, perhaps with the solid fixed ring ligature steel wire in the framework, can realize the fixed of framework on the reinforced pile at stand top with the steel wire ligature again, improved the convenience in utilization of maintenance frame.

Preferably, the inner side pipe walls of the first pipe body close to the two ends are fixedly connected with second annular sealing rings, and the inner circumferential walls of the second sealing rings are abutted against the outer side pipe walls of the second pipe body.

Through adopting above-mentioned technical scheme, the outside pipe wall through the internal perisporium of second sealing washer and second body supports tightly, has restricted the second body and has come off from first body for flexible connection of pipe is more stable

Preferably, the outer pipe wall of the end of the second pipe body, which is not inserted into the first pipe body, is fixedly connected with a third sealing ring, the outer side wall of the connecting pipe is also fixedly connected with a protection pipe, and the third sealing ring on the second pipe body can be tightly abutted to the inner side wall of the protection pipe.

Through adopting above-mentioned technical scheme, can support tightly with the inside wall of protection tube through the third sealing washer on the second body for the flexible pipe is more stable with being connected of second body.

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

1. the maintenance frame is fixedly connected with the outer pipe wall of the second pipe body through the first sealing ring, the inner pipe wall of the first pipe body can be tightly supported through the first sealing ring, when the length of the telescopic pipe is adjusted, the telescopic pipe cannot leak water from the joint of the first pipe body and the second pipe body, the inner pipe wall of the second pipe body can be tightly supported through the sealing pipe, when the flexible pipe is connected with the second pipe body, the flexible pipe can be connected with the second pipe body only by inserting the sealing pipe into the second pipe body through the connecting pipe, meanwhile, the joint of the flexible pipe and the second pipe body cannot leak water, the length of the telescopic pipe can be adjusted, the flexibility can be changed at will through the flexible pipe, when the maintenance frame is installed, the flexible pipe and the second pipe body can be connected one by one through surrounding the reinforced pile, meanwhile, the maintenance frame is tied on the reinforced pile through a steel wire or a rope, the first pipe body and the second pipe body are rotated to enable the spraying opening to face the center of the top end of the stand column, the maintenance frame can adapt to the stand column with any polygonal cross section, the size of the maintenance frame can be adjusted according to the size of the cross section of the stand column, and applicability of the maintenance frame is improved.

2. Can lead to the closing cap that closes the water inlet through can dismantling on the oral siphon for when the maintenance frame is when the ordinary concrete of maintenance, only need with a water inlet in the water piping connection framework can, when maintenance frame maintenance bulky concrete, all open the water inlet in the framework and connect the water pipe, make the rivers spraying amount increase of framework, can play a cooling effect well, improved the suitability of maintenance frame.

Drawings

Fig. 1 is an overall schematic view of a concrete spray curing frame.

Fig. 2 is an exploded view of a partial structure of a concrete spray curing frame.

Fig. 3 is an exploded view of a partial structure of a concrete spray curing frame.

FIG. 4 is a schematic view showing a partial structure of a concrete spray curing frame

Description of reference numerals:

1. a frame body; 11. a telescopic pipe; 111. a first pipe body; 1111. a second seal ring; 112. a second tube body; 1121. a first seal ring; 1122. a third seal ring; 12. a flexible tube; 121. a connecting pipe; 1211. sealing the tube; 1212. protecting the tube; 13. a water inlet pipe; 14. sealing the cover; 141. a connecting ring; 142. connecting the circular rings; 143. connecting ropes; 144. a sealing block; 15. a fixing ring; 16. a spray opening.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses concrete sprays maintenance frame. Referring to fig. 1, a concrete spray curing frame includes a frame body 1 having a quadrangular shape.

Referring to fig. 1 and 2, the frame 1 includes four telescopic tubes 11 and four flexible tubes 12. The extension tube 11 includes a first tube 111, and the first tube 111 is in a shape of a circular tube. The telescopic tube 11 further includes two second tube bodies 112, the second tube bodies 112 are in a circular tube shape, the two second tube bodies 112 have the same length as the first tube body 111, and the two second tube bodies 112 are respectively inserted into the first tube body 111 from two end portions of the first tube body 111. The outer wall of the second tube 112 inserted into one end of the first tube 111 is fixedly connected with a first annular sealing ring 1121, in this embodiment, the first sealing ring 1121 is a rubber ring, the first sealing ring 1121 and the second tube 112 are coaxial, the outer diameter of the first sealing ring 1121 is 1.01 times the inner diameter of the first tube 111, the inner diameter of the first sealing ring 1121 is consistent with the outer diameter of the second tube 112, the inner circumferential wall of the first sealing ring 1121 is fixedly and sealingly connected with the outer wall of the second tube 112, and the outer circumferential wall of the first sealing ring 1121 can abut against the inner circumferential wall of the first tube 111. The inner pipe walls at two ends of the first pipe body 111 are fixedly connected with second annular sealing rings 1111, the second sealing rings 1111 are rubber rings, the outer diameter of the second sealing rings 1111 is consistent with the inner pipe diameter of the first pipe body 111, the inner diameter of the second sealing rings 1111 is 99% of the outer pipe diameter of the second pipe body 112, the second sealing rings 1111 and the first pipe body 111 are coaxial, the outer peripheral wall of the second sealing rings 1111 is fixedly and hermetically connected with the inner pipe wall of the first pipe body 111, and the inner peripheral wall of the second sealing rings 1111 abuts against the outer pipe wall of the second pipe body 112. When the ends of the two second tubes 112 with the first sealing rings 1121 are inserted into the first tube 111 to assemble the telescopic tube 11, the first sealing rings 1121 tightly abut against the inner wall of the first tube 111, and the two second sealing rings 1111 on the first tube 111 tightly abut against the outer walls of the two second tubes 112 respectively to limit the second tubes 112 to separate from the first tube 111. A plurality of spray openings 16 are uniformly formed in the outer pipe walls of the first pipe body 111 and the second pipe body 112 along the length direction of the first pipe body, and the spray openings 16 are in a shower shape.

Referring to fig. 3, a third annular sealing ring 1122 is fixedly connected to an outer wall of the second tube 112 at an end not inserted into the first tube 111, the third sealing ring 1122 is a rubber ring, an inner diameter of the third sealing ring 1122 is identical to an outer diameter of the second tube 112, the third sealing ring 1122 is coaxial with the second tube 112, and an inner circumferential wall of the third sealing ring 1122 is fixedly and sealingly connected to the outer wall of the second tube 112.

Referring to fig. 3, the end of the second pipe body 112, which is not inserted into the first pipe body 111, is detachably connected to the flexible pipe 12, in this embodiment, the flexible pipe 12 is a corrugated pipe, the two ends of the flexible pipe 12 are fixedly connected to the connection pipe 121, and the second pipe body 112 and the flexible pipe 12 are connected through the connection pipe 121. The connection pipe 121 is a circular pipe, the inner diameter of the connection pipe 121 is the same as the inner diameter of the flexible pipe 12, the connection pipe 121 and the flexible pipe 12 are coaxial, the connection pipe 121 is fixedly and hermetically connected with the flexible pipe 12 through glue, the connection pipe 121 is communicated with the flexible pipe 12, a sealing pipe 1211 in a circular pipe shape is fixedly and hermetically connected to the outer pipe wall of the connection pipe 121, the sealing pipe 1211 is a rubber pipe, the sealing pipe 1211 is coaxial with the connection pipe 121, the sealing pipe 1211 is shorter than the connection pipe 121, the inner pipe diameter of the sealing pipe 1211 is the same as the outer pipe diameter of the connection pipe 121, the outer pipe diameter of the sealing pipe 11211 is 1.01 times of the inner pipe diameter of the second pipe body 112, one end of the sealing pipe 1211, away from the flexible pipe 12, is flush with one end of the connection pipe 121, away from the flexible pipe 12, the inner pipe wall of the sealing pipe 1211 is fixedly connected with the outer pipe wall of the connection pipe 121, and when the connection pipe 121 is inserted into the second pipe body 112, the outer pipe wall of the sealing pipe 1211 tightly abuts against the inner pipe body 112. A protection tube 1212 is fixedly connected to an outer tube wall of the connection tube 121, the protection tube 1212 is in a circular tube shape, the protection tube 1212 and the connection tube 121 are coaxial, the protection tube 1212 is longer than the sealing tube 1211 and shorter than the connection tube 121, the protection tube 1212 is sleeved on the connection tube 121, a tube diameter of the protection tube 1212 is gradually increased from one end connected to the connection tube 121 and the flexible tube 12 to the other end, an inner tube diameter of one end of the protection tube 1212 is equal to an outer tube diameter of the connection tube 121, and an inner tube diameter of the other end of the protection tube 1212 is larger than an outer diameter of the third sealing ring 1122. The end of the protection tube 1212, which has the same outer diameter as the connection tube 121, is fixedly connected to the outer wall of the connection tube 121, the end of the protection tube 1212, which is connected to the connection tube 121, is located between the flexible tube 12 and the sealing tube 1211, the end of the protection tube 1212, which is larger than the third sealing ring 1122, is flush with the end of the connection tube 121, which is away from the flexible tube 12, when the connection tube 121 is connected to the second tube 112, the connection tube 121 is inserted into the second tube 112, the outer wall of the sealing tube 1211 abuts against the inner sidewall of the second tube 112, and the inner sidewall of the protection tube 1212 abuts against the third sealing ring 1122 on the second tube 112.

Referring to fig. 4, a communication opening penetrates through the middle of the first pipe 111 along the length direction, a water inlet pipe 13 which is in a circular tube shape and has an axis perpendicular to the axis of the first pipe 111 is fixedly and hermetically connected to the communication opening, the water inlet pipe 13 is communicated with the first pipe 111, and one end of the water inlet pipe 13, which is far away from the first pipe 111, is a water inlet. The water inlet pipe 13 is detachably connected with a sealing cover 14 capable of closing and opening the water inlet, the sealing cover 14 is in a barrel shape, the inner diameter of the sealing cover 14 is 1.01 times of the outer diameter of the water inlet pipe 13, a round-table-shaped sealing block 144 is fixedly connected to the inner plate surface of the bottom plate of the sealing cover 14, the sealing block 144 is a rubber block, the sealing block 144 and the bottom plate of the sealing cover 14 are coaxial, the diameter of one end, connected with the bottom plate of the sealing cover 14, of the sealing block 144 is 1.05 times of the inner diameter of the water inlet pipe 13, and the diameter of one end, far away from the bottom plate of the sealing cover 14, of the sealing block 144 is 96% of the inner diameter of the water inlet pipe 13. An arc-shaped connecting ring 141 is fixedly connected to the outer plate surface of the bottom plate of the cover 14, a connecting rope 143 is fixedly connected to the connecting ring 141, a circular connecting ring 142 is fixedly connected to one end of the connecting rope 143 away from the connecting ring 141, the inner diameter of the connecting ring 142 is larger than the outer diameter of the first tube 111, and the connecting ring 142 is sleeved on the telescopic tube 11.

Referring to fig. 1, the frame 1 is further provided with four fixing rings 15, the fixing rings 15 are annular, the inner diameter of each fixing ring 15 is larger than the outer diameter of all the pipes in the frame 1, the fixing rings 15 are sleeved on the frame 1, and the top of each upright post is reserved with a steel bar pile head for subsequent construction, so that the frame 1 can be fixed on the steel bar pile head by using the fixing rings 15.

The implementation principle of the concrete spraying maintenance frame of the embodiment of the application is as follows: when the outside of the quadrangular upright post is wrapped with a layer of plastic film to slowly coagulate concrete, the maintenance frame is placed on the top of the upright post in order to prevent the top of the upright post, which is not covered with the plastic film, from chapping. When the maintenance frame is installed, the length of the second tube body 112 inserted into the first tube body 111 is sequentially adjusted, so that the length of the telescopic tube 11 is adjusted, the four telescopic tubes 11 are respectively adjusted to be consistent in width of the four side walls of the upright column, the telescopic tube 11 and the flexible tube 12 are sequentially connected, the connecting tube 121 is fixedly connected to the two ends of the flexible tube 12, the sealing tube 1211 is fixedly connected to the outer wall of the connecting tube 121, the connecting tube 121 with the sealing tube 1211 inserted into the second tube body 112, the connecting tube 121 is hermetically connected to the second tube body 112, the connecting tube 121 is fixedly connected to the protection tube 1212, the inner wall of the protection tube 1212 can tightly abut against the third sealing tube 1211 on the second tube body 112, and connection between the connecting tube 121 and the second tube body 112 is further stabilized. After four telescopic pipes 11 and flexible pipes 12 are connected in sequence to form a whole frame body 1, fixing rings 15 on the frame body 1 are sleeved on a steel bar pile reserved at the top of a stand column, or fixing rings 15 on the frame body 1 are bound with steel wires, and then the steel wires are bound on the steel bar pile at the top of the stand column to fix the frame body 1. After the frame 1 is fixed to the column, the first and second pipes 111 and 112 are rotatably adjusted so that the spray openings 16 of the first and second pipes 111 and 112 face the center of the top of the column. Break away from closing cap 14 on one of them oral siphon 13, with oral siphon 13 and a water piping connection for framework 1 leads to water, makes hydroenergy spout from spraying opening 16, because spraying opening 16 is the gondola water faucet form, makes from spraying opening 16 spun rivers more fine and smooth, more even. Because the length of the telescopic pipe 11 can be adjusted within a certain range, the frame 1 can be adjusted according to the width of the side wall of different upright columns, and the flexible pipe 12 can be bent at will, so that the applicability of the frame 1 to any quadrilateral upright column is realized, and the overall applicability of the frame 1 is improved.

When meetting bulky concrete, can take off closing cap 14 on four oral siphon 13 to connect the water pipe simultaneously with four oral siphon 13, make the water yield grow that sprays, make rivers can slowly flow down along the length direction of stand, make the concrete of rivers ability on to the stand of flowing down cool down, improved the suitability of framework 1.

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 (8)

1. The concrete spraying maintenance frame is characterized by comprising a frame body (1), wherein the frame body (1) comprises a plurality of extension tubes (11), each extension tube (11) comprises a first tube body (111), two second tube bodies (112) are respectively inserted into two ends of each first tube body (111), each second tube body (112) is inserted into an outer tube wall of one end of each first tube body (111) and is fixedly connected with a circular flexible waterproof first sealing ring (1121), the first sealing ring (1121) and the second tube bodies (112) are coaxial, the inner tube wall of each first tube body (111) is tightly abutted to the outer peripheral wall of each sealing ring, one end, far away from the first tube body (111), of each second tube body (112) is detachably connected with a flexible tube (12) capable of randomly changing the bending degree, each flexible tube (12) is detachably connected with the corresponding second tube body (112), two ends of each flexible tube (12) are fixedly connected with a connecting tube (121), each connecting tube (121) is communicated with each flexible tube (12), a circle of outer tube wall of each connecting tube (121) is fixedly connected with the corresponding to the corresponding one circle of the corresponding flexible waterproof sealing tube (112), and the inner side of each second tube (1211); the pipe wall of the first pipe body (111) is provided with a communication port, the communication port is fixedly and hermetically connected with an inlet pipe (13), the inlet pipe (13) is communicated with the first pipe body (111), one end, far away from the first pipe body (111), of the inlet pipe (13) is a water inlet, and the side pipe wall of the first pipe body (111) and the side pipe wall of the second pipe body (112) are both provided with a spraying port (16) along the length direction of the side pipe wall.

2. The concrete spraying curing frame of claim 1, characterized in that the water inlet pipe (13) is a circular pipe, and a cover (14) capable of closing and opening the water inlet is detachably connected to the water inlet pipe (13).

3. The concrete spraying maintenance frame according to claim 2, wherein the cover (14) is in a barrel shape, a truncated cone-shaped sealing block (144) is fixedly connected to the inner side of the bottom plate of the cover (14), the diameter of the end, connected with the cover (14), of the sealing block (144) is larger than that of the end, far away from the bottom of the cover (14), of the sealing block (144), and the diameter of the end, connected with the cover (14), of the sealing block (144) is larger than that of the water inlet pipe (13).

4. A concrete spraying maintenance frame according to claim 1, characterized in that said spraying opening (16) is shower-shaped.

5. The concrete spraying curing frame as claimed in claim 3, characterized in that a connecting rope (143) is fixedly connected to the outer surface of the bottom plate of the cover (14), a connecting ring (141) is fixedly connected to one end of the connecting rope (143) far away from the cover (14), and the connecting ring (141) is sleeved on the telescopic pipe (11).

6. A concrete spraying maintenance frame according to claim 1, characterized in that the telescopic pipe (11) is further sleeved with a fixing ring (15) for fixing the maintenance frame.

7. The concrete spraying maintenance frame according to claim 1, wherein the inner side pipe wall of the first pipe body (111) close to the two ends is fixedly connected with a second annular sealing ring (1111), and the inner circumferential wall of the second annular sealing ring (1111) is tightly abutted against the outer side pipe wall of the second pipe body (112).

8. The concrete spraying maintenance frame according to claim 1, wherein a third sealing ring (1122) is fixedly connected to an outer wall of an end of the second pipe (112) not inserted into the first pipe (111), a protection pipe (1212) is further fixedly connected to an outer side wall of the connection pipe (121), and the third sealing ring (1122) of the second pipe (112) can be tightly abutted to an inner side wall of the protection pipe (1212).

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