Sealing device for joint of double-wall corrugated pipe and cement inspection well

Abstract

The utility model discloses a sealing device for a joint of a double-wall corrugated pipe and a cement inspection well, which comprises the cement inspection well, the double-wall corrugated pipe and a sealing component, the sealing component comprises an annular capsule, and a filling port and an exhaust port which are communicated with the inside of the annular capsule are respectively and correspondingly arranged on two sides of the annular capsule. And the annular capsule is sleeved outside the connecting end of the double-wall corrugated pipe and is inserted into a bell mouth of the cement inspection well. The expansion cement is poured into the annular capsule, and the annular capsule is filled and sealed in the gap between the inner wall of the bell mouth of the cement inspection well and the outer wall of the double-wall corrugated pipe by utilizing the volume expansion when the expansion cement is solidified and formed, so that the effects of sealing the joint and fixing the double-wall corrugated pipe are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing connection between a double-walled corrugated pipe for drainage and a cement inspection well, in particular to a sealing device for the connection between the double-walled corrugated pipe and the cement inspection well. Background Art

[0002] With the steady advancement of national infrastructure and urbanization, underground drainage pipe systems have higher and higher requirements for water-tightening effects. As the main force of drainage pipe systems, double-wall corrugated pipes have made great progress. With the continuous optimization and improvement of the connection methods between double-wall corrugated pipes, water-tightening effects can basically be achieved at present.

[0003] Cement inspection wells are cost-effective and have a long service life. In actual construction, cement inspection wells are generally connected to double-walled corrugated pipes to form a pipe network system. At present, the connection between the double-walled corrugated pipe and the cement inspection well is generally sealed with concrete filling. Due to the different properties of high-density polyethylene and cement, the shrinkage rate is very different. Therefore, after a period of use, deformation will occur at the connection, causing leakage. In addition, the fluid in the pipeline flushes the inspection well foundation for a long time, causing the foundation to be hollowed out. This is why many inspection wells on the road surface are sunken, posing a huge safety hazard. Therefore, it is urgent to develop a new sealing device for the connection between the double-walled corrugated pipe and the cement inspection well. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings of the prior art and to provide a sealing device for the connection between a double-walled corrugated pipe and a cement inspection well. By pouring expansive cement into an annular capsule and utilizing the volume expansion of the expansive cement during solidification, the annular capsule is filled and sealed in the gap between the inner wall of the socket of the cement inspection well and the outer wall of the double-walled corrugated pipe, thereby achieving the function of sealing the connection and fixing the double-walled corrugated pipe.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sealing device for the connection between a double-walled corrugated pipe and a cement inspection well, comprising a cement inspection well, a double-walled corrugated pipe and a sealing component, characterized in that the sealing component comprises an annular capsule, and two sides of the annular capsule are respectively provided with a filling port and an exhaust port communicated with the interior thereof, the annular capsule is sleeved on the outside of the connecting end of the double-walled corrugated pipe and inserted into the socket of the cement inspection well, the annular capsule is 2-3 wave crests of the double-walled corrugated pipe away from the port of the connecting end of the double-walled corrugated pipe, and spans two adjacent wave crests and one wave trough of the double-walled corrugated pipe, and expansive cement is poured into the annular capsule through the filling port, and after the expansive cement is solidified and formed, the annular capsule is filled and sealed in the gap between the inner wall of the socket of the cement inspection well and the outer wall of the double-walled corrugated pipe, so that the double-walled corrugated pipe is sealed and fixed in the socket of the cement inspection well.

[0007] Furthermore, the material of the annular capsule is one of natural rubber, butyl rubber and butadiene rubber.

[0008] Furthermore, sealant is applied on the inner wall of the socket of the cement inspection well and on the outer wall of the double-wall corrugated pipe at the fitting position of the annular capsule.

[0009] Furthermore, the sealant is polyurethane waterproof glue.

[0010] Furthermore, the filling port and the exhaust port are both pipes integrally connected to the annular capsule.

[0011] Furthermore, the tubes are all bent toward the outside of the annular capsule.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model pours expansive cement into the annular capsule, utilizes the volume expansion of the expansive cement when solidifying and forming, fills the annular capsule and seals it in the gap between the inner wall of the cement inspection well socket and the outer wall of the double-wall corrugated pipe, can seal the connection and fix the double-wall corrugated pipe, and avoids the problem of deformation and falling off of the connection due to material incompatibility caused by the traditional method of directly filling cement, which causes leakage.

[0014] 2. The utility model is convenient for connection construction, the connection is firm, the sealing is good, and it is anti-loosening and anti-leakage.

[0015] 3. The expanded cement after pouring of the utility model is located inside the annular capsule, which has strong environmental resistance and prolongs the service life.

[0016] 4. When uneven settlement occurs due to the large contact area between the double-wall corrugated pipe and the socket of the cement inspection well, the annular capsule fills and seals in the gap between the inner wall of the socket of the cement inspection well and the outer wall of the double-wall corrugated pipe, thereby effectively improving the anti-settlement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A.

[0019] Figure 3 It is a structural schematic diagram of the annular capsule in the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 A sealing device for the connection between a double-walled corrugated pipe and a cement inspection well comprises a cement inspection well 1, a double-walled corrugated pipe 2 and a sealing component, wherein the sealing component comprises an annular capsule 3, and both sides of the annular capsule 3 are respectively provided with a filling port 4 and an exhaust port 5 which are communicated with the interior thereof, the annular capsule 3 is sleeved on the outside of the connecting end of the double-walled corrugated pipe 2 and inserted into the socket 6 of the cement inspection well 1, the annular capsule 3 is two wave crests of the double-walled corrugated pipe 2 away from the port of the connecting end of the double-walled corrugated pipe 2, and spans two adjacent wave crests and one wave trough of the double-walled corrugated pipe 2, and expansive cement is poured into the annular capsule 3 through the filling port 4, and after the expansive cement is solidified and formed, the annular capsule 3 is filled and sealed in the gap between the inner wall of the socket 6 of the cement inspection well 1 and the outer wall of the double-walled corrugated pipe, so that the double-walled corrugated pipe is sealed and fixed in the socket of the cement inspection well.

[0022] In the utility model, the 3 materials of the annular capsule are one of natural rubber, butyl rubber and butadiene rubber, and have the characteristics of large pressure bearing, high elasticity and the like.

[0023] Therefore, by utilizing the elasticity of the annular capsule 3, after the poured expansive cement solidifies and takes shape, the annular capsule 3 can be filled and sealed in the gap between the inner wall of the socket 6 of the cement inspection well 1 and the outer wall of the double-wall corrugated pipe 2, thereby achieving a water-stopping sealing effect at the connection.

[0024] In the utility model, sealant is applied on the inner wall of the socket 6 of the cement inspection well 1 and the outer wall of the double-wall corrugated pipe 2 at the fitting position of the annular capsule 3 .

[0025] In the utility model, the sealant is a polyurethane waterproof glue with a short solidification time, a soft texture and strong adhesion. It is used for the surface treatment of the inner wall of the socket 6 of the cement inspection well 1, and can reduce the risk of loose fit with the annular capsule 3 due to pores and pits on the inner wall surface of the socket 6.

[0026] In the utility model, the filling port 4 and the exhaust port 5 are both pipes integrally connected to the annular capsule 3 .

[0027] Furthermore, the pipes are all bent toward the outside of the annular capsule 3, so as to ensure that the injection port 4 faces the construction personnel, thereby facilitating the subsequent injection of expansion cement and facilitating the overflow of excess expansion cement.

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] The construction process of the sealing device for the connection between a double-wall corrugated pipe and a cement inspection well of the utility model is as follows:

[0030] S1. Prepare expansive cement: uniformly mix cement, foam stabilizer, foaming agent, enhancer, quick setting agent and water in a mass ratio of 1:0.03:0.02:0.02:0.04:0.5 to prepare expansive cement with an expansion rate of 6%.

[0031] The expansion rate of expansive cement is 6%. After expansion, it is dense and uniform, and the time is controllable.

[0032] It should be noted that a too high expansion rate will cause the annular capsule 3 to swell excessively and lose its elasticity, thereby weakening the sealing effect, and even causing the capsule to rupture in severe cases; while a too low expansion rate will not be able to compact the annular capsule 3 tightly, that is, fill and seal the gap between the inner wall of the socket 6 of the cement inspection well 1 and the outer wall of the double-wall corrugated pipe 2, and thus fail to play a sealing role. Therefore, the expansion rate of the expansive cement is limited to 6% in this embodiment.

[0033] Among them, cement is a silicate component with high strength and easy to obtain.

[0034] The structural formula of the foam stabilizer is:

[0035]

[0036] Wherein, R1 and R2 are alkyl groups containing 3-10 carbon atoms respectively, and R is a carbon molecular skeleton.

[0037] After adding the foam stabilizer, the stability of the foaming agent can be greatly improved.

[0038] The foaming agent has a short foaming time, a small foaming volume and uniform density.

[0039] The enhancer assists the foam stabilizer in maintaining the formed bubbles from collapsing.

[0040] Fast-setting agents can make the expansive cement set quickly, thereby speeding up the construction process.

[0041] It should be noted that before preparing the expansive cement, the cement, foam stabilizer, foaming agent, enhancer and quick setting agent are packaged in bags or bottles according to the mass ratio set in step S1, so as to prepare the expansive cement at the construction site, which is simple to operate and easy to use.

[0042] S2. Install cement inspection well and double-wall corrugated pipe: Lay cement inspection well 1 and double-wall corrugated pipe 2 in the excavated trench.

[0043] S3. Apply sealant: Apply a layer of polyurethane waterproof glue on the inner wall of the socket 6 of the cement inspection well 1 and the outer wall of the double-wall corrugated pipe 2 at the fitting position of the annular capsule 3.

[0044] S4. Install the sealing component: put the annular capsule 3 on the outside of the connecting end of the double-walled corrugated pipe 2, so that the annular capsule 3 is two wave crests of the double-walled corrugated pipe 2 away from the port of the connecting end of the double-walled corrugated pipe 2, and spans two adjacent wave crests and one wave trough of the double-walled corrugated pipe 2, so as to facilitate sealing and fixing after the expansion cement solidifies and forms, and then insert the connecting end of the double-walled corrugated pipe 2 into the socket 6 of the cement inspection well 1.

[0045] It should be noted that when the annular capsule 3 is installed, it is necessary to ensure that the injection port 4 faces the construction worker side, so as to facilitate the subsequent injection of expansion cement.

[0046] S5. Pouring expansive cement: Use a cement syringe to pour the expansive cement prepared in step S1 from the pouring port 4 into the annular capsule 3 until the expansive cement overflows from the exhaust port 5; then, use a sealing clamp to clamp the exhaust port 5, and continue to use the cement syringe to pour expansive cement into the annular capsule 3 until the expansive cement in the annular capsule 3 is dense, that is, the expansive cement overflows from the pouring port 4, and then use a sealing clamp to clamp the pouring port 4; after the expansive cement solidifies and takes shape, the annular capsule 3 fills and seals the gap between the inner wall of the socket 6 of the cement inspection well 1 and the outer wall of the double-wall corrugated pipe 2, so that the double-wall corrugated pipe 2 can be sealed and fixed in the socket 6 of the cement inspection well 1.

[0047] It should be noted that after the expansion cement is prepared, the expansion time of the expansion cement is 45 minutes, which is fully sufficient for the time required for pouring, and the strength after expansion is high, and the collapse rate is less than 1%. After reaching the above expansion time, the cement enters the initial setting stage.

[0048] After pouring, the expansive cement enters the initial setting stage and is initially solidified within 2 hours. Then, related operations around the double-wall corrugated pipe 2 can be carried out. It is completely solidified after 24 hours and a water-tightness test can be carried out after 48 hours, which is 1 / 3 faster than traditional construction.

[0049] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0050] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A sealing device for the connection between a double-walled corrugated pipe and a cement inspection well, comprising a cement inspection well, a double-walled corrugated pipe and a sealing component, characterized in that: The sealing component includes an annular capsule, and the two sides of the annular capsule are respectively provided with an injection port and an exhaust port connected to the interior thereof. The annular capsule is mounted on the outside of the connecting end of the double-walled corrugated pipe and inserted into the socket of the cement inspection well. The annular capsule is 2-3 wave crests of the double-walled corrugated pipe away from the port of the connecting end of the double-walled corrugated pipe, and spans two adjacent wave crests and one wave trough of the double-walled corrugated pipe. Expansive cement is poured into the annular capsule through the injection port. After the expansive cement is solidified and formed, the annular capsule fills and seals the gap between the inner wall of the socket of the cement inspection well and the outer wall of the double-walled corrugated pipe, thereby sealing and fixing the double-walled corrugated pipe in the socket of the cement inspection well.

2. The sealing device for the connection between a double-wall corrugated pipe and a cement inspection well according to claim 1 is characterized in that: The material of the annular capsule is one of natural rubber, butyl rubber and butadiene rubber.

3. The sealing device for the connection between a double-wall corrugated pipe and a cement inspection well according to claim 1 is characterized in that: Sealant is applied on the inner wall of the socket of the cement inspection well and on the outer wall of the double-wall corrugated pipe at the fitting position of the annular capsule.

4. A sealing device for the connection between a double-wall corrugated pipe and a cement inspection well according to claim 3, characterized in that: The sealant is polyurethane waterproof glue.

5. The sealing device for the connection between a double-wall corrugated pipe and a cement inspection well according to claim 1, characterized in that: The filling port and the exhaust port are both pipes integrally connected to the annular capsule.

6. A sealing device for the connection between a double-wall corrugated pipe and a cement inspection well according to claim 5, characterized in that: The tubes are all bent toward the outside of the annular capsule.

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