A rapid repair connection device and construction method for drain pipes in buildings

Abstract

The present invention discloses a quick repair connection device and construction method for drain pipes in buildings, including a lower connecting pipe and a joint, characterized in that: a sliding cylinder is sleeved outside the lower connecting pipe; the lower connecting pipe is composed of an inner pipe of the lower connecting pipe and an outer pipe of the lower connecting pipe, and the upper end of the inner pipe of the lower connecting pipe is fixedly connected to the upper end of the outer pipe of the lower connecting pipe; the sliding cylinder is composed of an outer pipe of the sliding cylinder and an inner pipe of the sliding cylinder, and the lower end of the outer pipe of the sliding cylinder is fixedly connected to the lower end of the inner pipe of the sliding cylinder; the outer pipe of the lower connecting pipe is inserted into the inner ring groove of the sliding cylinder and fixedly bonded by PVC edge sealing glue; a joint retaining ring is fixedly arranged on the side wall of the bottom of the inner cavity of the joint, and an insertion ring groove adapted to the outer pipe of the sliding cylinder is arranged in the peripheral wall of the joint. The upper end part of the outer pipe of the sliding cylinder is inserted into the insertion ring groove of the joint and fixedly bonded by PVC edge sealing glue. The present invention is convenient for repair and installation, saves time and effort, does not occur the phenomena of water seepage and odor leakage, and reduces the repair cost of the drain pipe.

Description

Technical Field

[0001] The present invention relates to an improvement in the repair method of PVC drain pipes in buildings, belonging to the technical field of building drainage, and specifically relates to a rapid repair connection device and construction method for drain pipes in buildings. Background Art

[0002] In the kitchens, balconies and washrooms of each floor of a building, PVC drain pipes are installed. The PVC drain pipes come in four specifications with outer diameters of 50 mm, 75 mm, 110 mm and 160 mm. The installation of the drain pipes uses pipe fittings made of PVC material, and they are bonded and fixed by applying PVC glue at the connection of the pipe fittings. The bonding length of the PVC glue for different diameters of PVC drain pipes is different, and it is based on ensuring the bonding strength. After installation, they cannot be disassembled. If such a PVC drain pipe is damaged, it needs to be repaired. Currently, a drain pipe connection device as shown in Figure 6 is used to repair a 110-mm-diameter drain pipe. This drain pipe connection device consists of an upper cover 8, an outer cylinder 9, a sealing ring 10 and a pressing ring 11. The inner diameter of the lower part of the outer cylinder 9 is adapted to the outer diameter of the drain pipe. An insertion blocking ring is fixedly provided on the inner wall of the lower part of the outer cylinder 9. The width of the insertion blocking ring is generally 1-2 mm, and the distance from the insertion blocking ring to the lower end of the outer cylinder 9 is the bonding length of the PVC glue. For a 110-mm-diameter drain pipe, the bonding length of its PVC glue is generally 45 mm. A sealing ring 10 and a pressing ring 11 are provided in the upper cavity of the outer cylinder 9. The upper outer wall of the outer cylinder 9 is threadedly connected with an upper cover 8. A central hole adapted to the outer diameter of the drain pipe is provided in the middle of the upper cover 8. An annular protrusion 81 is fixedly provided at the central hole in the cavity of the upper cover 8. The pressing ring 11 is located between the annular protrusion 81 and the sealing ring 10. The construction method for repairing the drain pipes in a building using the above drain pipe connection device is as follows: A. First, cut off the upper and lower parts of the damaged part of the drain pipe to obtain the upper end drain pipe 2 and the lower end drain pipe 1. The distance between the upper end drain pipe 2 and the lower end drain pipe 1 should be greater than the sum of the height of the drain pipe connection device and the installation depth of a direct 3; the said direct 3 is as shown in Figure 7As shown, a direct retaining ring 31 is fixedly provided in the middle of the inner wall of the direct pipe 3. The width of the direct retaining ring 31 is generally 1 - 2 millimeters. The distances from the direct retaining ring 31 to both ends of the direct pipe 3 are the PVC glue bonding lengths, that is, the installation depth of the direct pipe 3 is the PVC glue bonding length. For a direct pipe 3 with an inner diameter of 110 millimeters, its PVC glue bonding length is 45 millimeters; B. Then cut a section from the new drain pipe as the straight pipe 12 for connection, and sleeved the upper cover 8, the outer cylinder 9, the sealing ring 10, and the pressing ring 11 on the straight pipe 12 in sequence; C. Apply PVC glue on the outer wall of the pipe orifice of the upper end drain pipe 2 and the inner wall of the upper opening of the direct pipe 3 respectively, and install the upper opening of the direct pipe 3 onto the pipe orifice of the upper end drain pipe 2, so that the lower port edge of the upper end drain pipe 2 abuts against the direct retaining ring 31 of the direct pipe 3. The insertion depth of the upper end drain pipe 2 is the PVC glue bonding length; D. Place the combination of the drain pipe connection device and the straight pipe 12 between the lower end drain pipe 1 and the direct pipe 3, and check whether the length of the straight pipe 12 is appropriate. If not, trim it in time; E. Apply PVC glue on the outer wall of the pipe orifice of the lower end drain pipe 1 and the inner wall of the lower end of the outer cylinder 9 respectively, and insert the pipe orifice of the lower end drain pipe 1 into the lower port of the outer cylinder 9, so that the upper port edge of the lower end drain pipe 1 abuts against the socket retaining ring on the inner wall of the outer cylinder 9. The insertion depth of the lower end drain pipe 1 is the PVC glue bonding length; F. Quickly apply PVC glue on the inner wall of the lower port of the direct pipe 3 and the outer wall of the upper opening of the straight pipe 12 respectively, and insert the upper end of the straight pipe 12 into the lower opening of the direct pipe 3 for bonding and fixing. The insertion depth of the straight pipe 12 into the direct pipe 3 is the PVC glue bonding length; G. Rotate the upper cover 8 to fixedly connect the upper cover 8 and the upper end of the outer cylinder 9. At the same time, make the annular protrusion 81 push the pressing ring 11 to press down the sealing ring 10, and the sealing ring 10 is sealed and fixed between the inner wall of the outer cylinder 9 and the outer wall of the straight pipe 12 to prevent water seepage and odor leakage. The disadvantages of this drain pipe connection device are as follows: The sealing ring is prone to aging, resulting in water seepage and odor leakage; A new section of drain pipe needs to be used, and the maintenance cost is relatively high; The maintenance process is relatively complex, time-consuming and laborious, with a large labor intensity and low maintenance efficiency. Summary of the Invention

[0003] An object of the present invention is to provide a rapid repair connection device for drain pipes in buildings, which has a simple structure, is convenient for repair and installation, does not have the phenomena of water seepage and odor leakage, and reduces the maintenance cost of drain pipes.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: A rapid repair connection device for the drain pipe inside a building includes a lower connecting pipe and a joint, and is characterized in that: A sliding cylinder is sleeved outside the lower connecting pipe; The lower connecting pipe is composed of an inner pipe of the lower connecting pipe and an outer pipe of the lower connecting pipe. The outer pipe of the lower connecting pipe is sleeved outside the inner pipe of the lower connecting pipe. The upper ends of the inner pipe of the lower connecting pipe and the outer pipe of the lower connecting pipe are fixedly connected. The annular cavity between the inner pipe of the lower connecting pipe and the outer pipe of the lower connecting pipe is an outer ring groove. The outer diameter of the inner pipe of the lower connecting pipe is the same as the outer diameter of the drain pipe; The sliding cylinder is composed of an outer pipe of the sliding cylinder and an inner pipe of the sliding cylinder. The outer pipe of the sliding cylinder is sleeved outside the inner pipe of the sliding cylinder. The lower ends of the outer pipe of the sliding cylinder and the inner pipe of the sliding cylinder are fixedly connected. The annular cavity between the outer pipe of the sliding cylinder and the inner pipe of the sliding cylinder is an inner ring groove. The inner diameter of the inner pipe of the sliding cylinder is the same as the outer diameter of the inner pipe of the lower connecting pipe. The inner pipe of the sliding cylinder is slidably sleeved on the outer wall of the inner pipe of the lower connecting pipe; The outer pipe of the lower connecting pipe is inserted into the inner ring groove and is fixedly bonded by PVC edge sealing glue. The inner pipe of the sliding cylinder is inserted into the outer ring groove. The depths of the inner ring groove and the outer ring groove are the same, and both are the bonding lengths of the PVC edge sealing glue; A joint retaining ring is fixedly provided on the side wall of the bottom of the inner cavity of the joint. The inner cavity of the joint above the joint retaining ring is an upper end drain pipe insertion cavity. The diameter of the upper end drain pipe insertion cavity is the same as the outer diameter of the drain pipe. The depth of the upper end drain pipe insertion cavity is not less than the PVC glue bonding length of the drain pipe. A plug-in ring groove adapted to the outer pipe of the sliding cylinder is provided in the peripheral wall of the joint. The upper end of the outer pipe of the sliding cylinder is inserted into the plug-in ring groove of the joint and is fixedly bonded by PVC edge sealing glue. The depth of the plug-in ring groove is the bonding length of the PVC edge sealing glue.

[0005] A top ring is provided in the cavity of the outer pipe of the sliding cylinder. The top ring is located between the lower connecting pipe and the joint. The upper port edge of the top ring contacts the lower port edge of the joint, and the lower port edge of the top ring contacts the upper port edge of the lower connecting pipe. The length of the top ring is the PVC glue bonding length of the drain pipe.

[0006] The length of the sliding cylinder is the sum of twice the bonding length of the PVC edge sealing glue, the thickness of the bottom plate of the inner ring groove, the thickness of the bottom plate of the outer ring groove, and the length of the top ring; The length of the lower connecting pipe is the sum of the length of the sliding cylinder and the PVC glue bonding length of the drain pipe; The length of the joint is greater than the bonding length of the PVC edge sealing glue.

[0007] The lower connecting pipe, the sliding cylinder, the top ring and the joint are all integrally formed by using PVC material at one time.

[0008] Another object of the present invention is to provide a rapid repair construction method for the drain pipe inside a building that uses the above rapid repair connection device for the drain pipe inside a building to repair a damaged PVC drain pipe. The repair and installation are convenient, time-saving and labor-saving, and there will be no phenomenon of water seepage and odor leakage, reducing the repair cost of the drain pipe, reducing the labor intensity and improving the repair efficiency.

[0009] To achieve the above object, the technical solution adopted by the present invention is as follows: A rapid repair construction method for the drain pipe in a building, characterized by comprising the following steps: Take the above-mentioned rapid repair connection device for the drain pipe in the building and set it aside for use;

[0010] A. First, cut above and below the damaged part of the drain pipe to obtain the upper drain pipe and the lower drain pipe. The distance between the upper drain pipe and the lower drain pipe is the sum of the length of the lower connecting pipe, the width of the direct retaining ring of the direct pipe, the width of the joint retaining ring of the joint, and the length of the top ring;

[0011] B. Take a direct pipe adapted to the drain pipe and set it aside. Apply PVC glue on the outer wall of the pipe orifice of the lower drain pipe and the inner wall of the direct cavity below the direct retaining ring respectively, and sleeved the lower part of the direct pipe on the upper port of the lower drain pipe;

[0012] C. Apply PVC glue on the outer wall of the pipe orifice of the upper drain pipe and the inner wall of the upper drain pipe insertion cavity of the joint respectively, and sleeved the upper drain pipe insertion cavity of the joint on the pipe orifice of the upper drain pipe;

[0013] D. Apply a circle of PVC edge sealing glue on the edge of the inner ring groove of the sliding cylinder, and then sleeved the sliding cylinder on the lower connecting pipe so that the upper end of the sliding cylinder is flush with the upper end of the lower connecting pipe;

[0014] E. Apply PVC glue on the inner wall of the direct cavity above the direct retaining ring, apply PVC glue on the outer wall of the lower end of the inner pipe of the lower connecting pipe, and insert the lower end of the inner pipe of the lower connecting pipe into the upper port of the direct pipe;

[0015] F. Apply a circle of PVC edge sealing glue at the edge of the insertion ring groove of the joint;

[0016] G. Place the top ring between the lower connecting pipe and the joint, slide the sliding cylinder upward so that the upper end of the outer pipe of the sliding cylinder is inserted into the insertion ring groove of the joint. At the same time, the outer pipe of the lower connecting pipe is inserted into the inner ring groove, and the inner pipe of the sliding cylinder is also inserted into the outer ring groove. After the PVC edge sealing glue solidifies, the installation can be completed.

[0017] The beneficial effects of the present invention are as follows: The structure is simple, the repair and installation are convenient, time and labor are saved, there will be no phenomena of water seepage and odor leakage, the repair cost of the drain pipe is reduced, the labor intensity is reduced, the repair efficiency is improved, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of the structure of the present invention in the use state;

[0019] Figure 2 It is an enlarged schematic cross-sectional view of the structure of the joint of the present invention;

[0020] Figure 3Structural sectional enlarged schematic diagram of the top ring of the present invention;

[0021] Figure 4 Structural sectional enlarged schematic diagram of the lower connecting pipe of the present invention;

[0022] Figure 5 Structural sectional enlarged schematic diagram of the sliding cylinder of the present invention;

[0023] Figure 6 Structural sectional schematic diagram of a drain pipe connecting device in a use state in the prior art;

[0024] Figure 7 Structural sectional enlarged schematic diagram of a straight pipe in the prior art.

[0025] In the figure: 1, lower end drain pipe; 2, upper end drain pipe; 3, straight pipe; 31, straight pipe retaining ring; 4, lower connecting pipe; 41, inner pipe of the lower connecting pipe; 42, outer pipe of the lower connecting pipe; 43, outer ring groove; 5, sliding cylinder; 51, outer pipe of the sliding cylinder; 52, inner pipe of the sliding cylinder; 53, inner ring groove; 6, top ring; 7, joint; 71, insertion ring groove; 72, joint retaining ring; 73, insertion cavity for the upper end drain pipe; 8, upper cover; 81, annular protrusion; 9, outer cylinder; 10, sealing ring; 11, pressing ring; 12, straight pipe. Specific embodiments

[0026] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 To manufacture the present invention for the repair of PVC drain pipes in buildings.

[0027] The rapid repair connection device for the drain pipe in a building includes a lower connecting pipe 4 and a joint 7, and is characterized in that: a sliding cylinder 5 is sleeved outside the lower connecting pipe 4; the lower connecting pipe 4 is composed of an inner pipe 41 of the lower connecting pipe and an outer pipe 42 of the lower connecting pipe. The outer pipe 42 of the lower connecting pipe is sleeved outside the inner pipe 41 of the lower connecting pipe. The upper ends of the inner pipe 41 of the lower connecting pipe and the outer pipe 42 of the lower connecting pipe are fixedly connected. The annular cavity between the inner pipe 41 of the lower connecting pipe and the outer pipe 42 of the lower connecting pipe is an outer ring groove 43. The outer diameter of the inner pipe 41 of the lower connecting pipe is the same as the outer diameter of the drain pipe; the sliding cylinder 5 is composed of an outer pipe 51 of the sliding cylinder and an inner pipe 52 of the sliding cylinder. The outer pipe 51 of the sliding cylinder is sleeved outside the inner pipe 52 of the sliding cylinder. The lower ends of the outer pipe 51 of the sliding cylinder and the inner pipe 52 of the sliding cylinder are fixedly connected. The annular cavity between the outer pipe 51 of the sliding cylinder and the inner pipe 52 of the sliding cylinder is an inner ring groove 53. The inner diameter of the inner pipe 52 of the sliding cylinder is the same as the outer diameter of the inner pipe 41 of the lower connecting pipe. The inner pipe 52 of the sliding cylinder is slidably sleeved on the outer wall of the inner pipe 41 of the lower connecting pipe; the outer pipe 42 of the lower connecting pipe is inserted into the inner ring groove 53 and is fixedly bonded by PVC edge sealing glue. The inner pipe 52 of the sliding cylinder is inserted into the outer ring groove 43. The depths of the inner ring groove 53 and the outer ring groove 43 are the same, and both are the bonding lengths of the PVC edge sealing glue; a joint retaining ring 72 is fixedly arranged on the side wall of the bottom of the inner cavity of the joint 7. The inner cavity of the joint 7 above the joint retaining ring 72 is an upper end drain pipe insertion cavity 72. The diameter of the upper end drain pipe insertion cavity 72 is the same as the outer diameter of the drain pipe. The depth of the upper end drain pipe insertion cavity 72 is not less than the PVC glue bonding length of the drain pipe to ensure the firmness of the bonding. During installation, the upper end drain pipe 2 is inserted into the upper end drain pipe insertion cavity 72 of the joint 7 and abuts against the joint retaining ring 72. The joint retaining ring 72 plays a role of blocking and limiting. A plug-in ring groove 71 adapted to the outer pipe 51 of the sliding cylinder is arranged in the peripheral wall of the joint 7. The upper end part of the outer pipe 51 of the sliding cylinder is inserted into the plug-in ring groove 71 of the joint 7 and is fixedly bonded by PVC edge sealing glue. The depth of the plug-in ring groove 71 is the bonding length of the PVC edge sealing glue.

[0028] A top ring 6 is arranged in the cavity of the outer pipe 51 of the sliding cylinder. The top ring 6 is located between the lower connecting pipe 4 and the joint 7. The upper port edge of the top ring 6 contacts the lower port edge of the joint 7, and the lower port edge of the top ring 6 contacts the upper port edge of the lower connecting pipe 4. The length of the top ring 6 is the PVC glue bonding length of the drain pipe; since the top ring 6 abuts against the upper end of the lower connecting pipe 4, during the process of sliding the sliding cylinder 5 along the outer wall of the lower connecting pipe 4, it is ensured that the lower connecting pipe 4 will not move, and the upper end of the sliding cylinder 5 will also be smoothly inserted into the plug-in ring groove 71 of the joint 7, and the installation is fast and reliable.

[0029] The length of the sliding cylinder 5 is the sum of twice the bonding length of the PVC edge sealing glue, the thickness of the bottom plate of the inner ring groove 53, the thickness of the bottom plate of the outer ring groove 43, and the length of the top ring 6; the length of the lower connecting pipe 4 is the sum of the length of the sliding cylinder 5 and the PVC glue bonding length of the drain pipe; the length of the joint 7 is greater than the bonding length of the PVC edge sealing glue.

[0030] The bonding length of the PVC edge-sealing adhesive is the same as or different from that of the PVC adhesive, and it is appropriate to meet the bonding strength.

[0031] Since the present invention is applied to a PVC drainage pipe, the lower connecting pipe 4, the sliding cylinder 5, the top ring 6 and the joint 7 are all integrally formed from PVC material at one time.

[0032] Use the above-mentioned rapid repair connection device for the drainage pipe in the building to repair the damaged PVC drainage pipe.

[0033] The rapid repair construction method for the drainage pipe in the building is characterized in that it includes the following steps:

[0034] A. First, cut above and below the damaged part of the drainage pipe to obtain the upper drainage pipe 2 and the lower drainage pipe 1. The distance between the upper drainage pipe 2 and the lower drainage pipe 1 is the sum of the length of the lower connecting pipe 4, the width of the direct retaining ring 31 of the direct 3, the width of the joint retaining ring 72 of the joint 7, and the length of the top ring 6;

[0035] B. Take a direct 3 adapted to the drainage pipe and set it aside. Apply PVC adhesive on the outer wall of the pipe orifice of the lower drainage pipe 1 and the inner wall of the direct 3 cavity below the direct retaining ring 31 respectively, and sleeved the lower part of the direct 3 on the upper port of the lower drainage pipe 1. Since the PVC adhesive cures quickly, the direct 3 can be fixed on the upper end of the lower drainage pipe 1 quickly;

[0036] C. Apply PVC adhesive on the outer wall of the pipe orifice of the upper drainage pipe 2 and the inner wall of the upper drainage pipe insertion cavity 73 of the joint 7 respectively, and sleeve the upper drainage pipe insertion cavity 73 of the joint 7 on the pipe orifice of the upper drainage pipe 2. After the PVC adhesive solidifies, the joint 7 is installed on the pipe orifice of the upper drainage pipe 2;

[0037] D. Apply a circle of PVC edge-sealing adhesive on the edge of the inner ring groove 53 of the sliding cylinder 5, and then sleeve the sliding cylinder 5 on the lower connecting pipe 4 so that the upper end of the sliding cylinder 5 is flush with the upper end of the lower connecting pipe 4. Since the PVC edge-sealing adhesive cures slowly, it will not affect the installation speed and quality;

[0038] E. Apply PVC adhesive on the inner wall of the direct 3 cavity above the direct retaining ring 31, apply PVC adhesive on the lower outer wall of the inner pipe 41 of the lower connecting pipe 4, and insert the lower end of the inner pipe 41 of the lower connecting pipe into the upper port of the direct 3;

[0039] F. Apply a circle of PVC edge-sealing adhesive at the edge of the insertion ring groove 71 of the joint 7;

[0040] G. Place the top ring 6 between the lower connecting pipe 4 and the joint 7. Slide the sliding cylinder 5 upward so that the upper end of the outer pipe 51 of the sliding cylinder is inserted into the insertion ring groove 71 of the joint 7. At the same time, the outer pipe 42 of the lower connecting pipe is inserted into the inner ring groove 53, and the inner pipe 52 of the sliding cylinder is also inserted into the outer ring groove 43. After the PVC edge-sealing glue solidifies, the installation can be completed.

[0041] When using the present invention in the process of maintenance and installation, there is no need to cut a new drainage pipe, which reduces the maintenance cost, saves time and effort, reduces the labor intensity, and there will be no phenomena of water seepage and odor leakage, improving the maintenance efficiency and quality, and having a relatively long service life. Example 1:

[0042] For the maintenance of a PVC drainage pipe with an outer diameter of 50 mm, the PVC glue bonding length of its matching direct 3 is 25 mm, and the width of the direct retaining ring 31 of the direct is 1 mm. This is the prior art.

[0043] In the present invention, the PVC edge-sealing glue bonding length is 35 mm; the thickness of the bottom plate of the inner ring groove 53 and the thickness of the bottom plate of the outer ring groove 43 are both 5 mm to ensure that the bottom plates of the inner ring groove 53 and the outer ring groove 43 will not break; the thickness of the bottom plate of the insertion ring groove 71 of the joint 7 is also 5 mm to ensure that the bottom plate of the insertion ring groove 71 will not break; the length of the top ring 6 is the PVC glue bonding length of the drainage pipe, that is, 25 mm.

[0044] The length of the sliding cylinder 5 is the sum of twice the PVC edge-sealing glue bonding length, the thickness of the bottom plate of the inner ring groove 53, the thickness of the bottom plate of the outer ring groove 43, and the length of the top ring 6, that is, 105 mm; the length of the lower connecting pipe 4 is the sum of the length of the sliding cylinder 5 and the PVC glue bonding length of the drainage pipe, that is, 130 mm; the length of the joint 7 is the sum of the PVC glue bonding length and the thickness of the bottom plate of the insertion ring groove 71, that is, 40 mm. The width of the joint retaining ring 72 of the joint 7 is 2 mm, and the depth of the upper drainage pipe insertion cavity 73 of the joint 7 is 38 mm; the length of the joint 7 is greater than the PVC glue bonding length, and the depth of the upper drainage pipe insertion cavity 73 thereof is not less than the PVC glue bonding length, meeting the bonding strength requirements.

[0045] When cutting the upper and lower parts of the damaged part of the drainage pipe, the distance between the upper drainage pipe 2 and the lower drainage pipe 1 is the sum of the length of the lower connecting pipe 4, the width of the direct retaining ring 31 of the direct 3, the width of the joint retaining ring 72 of the joint 7, and the length of the top ring 6, that is, 158 mm; then install it according to the above-mentioned rapid repair construction method for the drainage pipe in the building. Example 2:

[0046] For the repair of a PVC drain pipe with an outer diameter of 75 mm, the bonding length of the PVC glue for the adapter direct 3 is 40 mm, and the width of the direct retaining ring 31 is 1 mm. This is the prior art.

[0047] In the present invention, the bonding length of the PVC edge-sealing glue is 35 mm; the thickness of the bottom plate of the inner ring groove 53 and the thickness of the bottom plate of the outer ring groove 43 are both 5 mm to ensure that the bottom plates of the inner ring groove 53 and the outer ring groove 43 will not break; the length of the top ring 6 is the bonding length of the PVC glue for the drain pipe, that is, 40 mm.

[0048] The length of the sliding cylinder 5 is the sum of twice the bonding length of the PVC edge-sealing glue, the thickness of the bottom plate of the inner ring groove 53, the thickness of the bottom plate of the outer ring groove 43, and the length of the top ring 6, that is, 120 mm; the length of the lower connecting pipe 4 is the sum of the length of the sliding cylinder 5 and the bonding length of the PVC glue for the drain pipe, that is, 160 mm; the length of the joint 7 is the sum of the bonding length of the PVC glue for the drain pipe and the width of the joint retaining ring 72 of the joint 7, where the width of the joint retaining ring 72 of the joint 7 is 2 mm, that is, the length of the joint is 42 mm. At this time, the manufacturing cost of the joint 7 should be comprehensively considered; the length of the joint 7 is greater than the bonding length of the PVC edge-sealing glue, and the depth of the upper drain pipe insertion cavity 73 of the joint 7 is not less than the bonding length of the PVC glue, meeting the bonding strength requirements.

[0049] When cutting the upper and lower parts of the damaged part of the drain pipe, the distance between the upper drain pipe 2 and the lower drain pipe 1 is the sum of the length of the lower connecting pipe 4, the width of the direct retaining ring 31 of the direct 3, the width of the joint retaining ring 72 of the joint 7, and the length of the top ring 6, that is, 203 mm; then the installation can be carried out according to the above-mentioned rapid repair construction method for the drain pipe in the building. Example 3:

[0050] For the repair of a PVC drain pipe with an outer diameter of 110 mm, the bonding length of the PVC glue for the adapter direct 3 is 45 mm, and the width of the direct retaining ring 31 is 2 mm. This is the prior art.

[0051] In the present invention, the bonding length of the PVC edge-sealing glue is 35 mm; the thickness of the bottom plate of the inner ring groove 53 and the thickness of the bottom plate of the outer ring groove 43 are both 5 mm to ensure that the bottom plates of the inner ring groove 53 and the outer ring groove 43 will not break; the length of the top ring 6 is the bonding length of the PVC glue for the drain pipe, that is, 45 mm.

[0052] The length of the sliding cylinder 5 is the sum of twice the bonding length of the PVC edge sealing glue, the thickness of the bottom plate of the inner ring groove 53, the thickness of the bottom plate of the outer ring groove 43, and the length of the top ring 6, that is, 125 mm; the length of the lower connecting pipe 4 is the sum of the length of the sliding cylinder 5 and the bonding length of the PVC glue of the drainage pipe, that is, 170 mm; the length of the joint 7 is the sum of the bonding length of the PVC glue of the drainage pipe and the width of the joint retaining ring 72 of the joint 7. The width of the joint retaining ring 72 of the joint 7 is 2 mm, that is, the length of the joint is 47 mm. At this time, the manufacturing cost of the joint 7 should be comprehensively considered; the length of the joint 7 is greater than the bonding length of the PVC edge sealing glue, and the depth of the upper drainage pipe insertion cavity 73 is not less than the bonding length of the PVC glue, meeting the bonding strength requirements.

[0053] When cutting the upper and lower parts of the damaged part of the drainage pipe, the distance between the upper drainage pipe 2 and the lower drainage pipe 1 is the sum of the length of the lower connecting pipe 4, the width of the direct retaining ring 31 of the direct 3, the width of the joint retaining ring 72 of the joint 7, and the length of the top ring 6, that is, 219 mm; then the installation can be carried out according to the above-mentioned rapid repair construction method of the drainage pipe in the building. Example 4:

[0054] For the repair of a PVC drainage pipe with an outer diameter of 160 mm, the bonding length of the PVC glue of the adapted direct 3 is 55 mm, and the width of the direct retaining ring 31 is 2 mm. This is the prior art.

[0055] In the present invention, the bonding length of the PVC edge sealing glue is 55 mm; the thickness of the bottom plate of the inner ring groove 53 and the thickness of the bottom plate of the outer ring groove 43 are both 5 mm to ensure that the bottom plates of the inner ring groove 53 and the outer ring groove 43 will not break; the thickness of the bottom plate of the insertion ring groove 71 of the joint 7 is also 5 mm to ensure that the bottom plate of the insertion ring groove 71 will not break; the length of the top ring 6 is the bonding length of the PVC glue of the drainage pipe, that is, 55 mm.

[0056] The length of the sliding cylinder 5 is the sum of twice the bonding length of the PVC edge sealing glue, the thickness of the bottom plate of the inner ring groove 53, the thickness of the bottom plate of the outer ring groove 43, and the length of the top ring 6, that is, 175 mm; the length of the lower connecting pipe 4 is the sum of the length of the sliding cylinder 5 and the bonding length of the PVC glue of the drainage pipe, that is, 230 mm; the length of the joint 7 is the sum of the bonding length of the PVC glue and the thickness of the bottom plate of the insertion ring groove 71, that is, 60 mm. The width of the joint retaining ring 72 of the joint 7 is 3 mm, and the depth of the upper drainage pipe insertion cavity 73 is 57 mm; the length of the joint 7 is greater than the bonding length of the PVC edge sealing glue, and the depth of the upper drainage pipe insertion cavity 73 is not less than the bonding length of the PVC glue, meeting the bonding strength requirements.

[0057] When cutting the upper and lower parts of the damaged drain pipe, the distance between the upper drain pipe 2 and the lower drain pipe 1 is the sum of the length of the lower connecting pipe 4, the width of the direct retaining ring 31 of the straight pipe 3, the width of the joint retaining ring 72 of the joint 7, and the length of the top ring 6, which is 290 mm; then the installation can be carried out according to the above-mentioned rapid repair construction method of the drain pipe in the building.

Claims

1. A rapid repair connection device for drain pipes in a building, comprising a lower connecting pipe (4) and a joint (7), characterized in that: A sliding cylinder (5) is sleeved outside the lower connecting pipe (4); the lower connecting pipe (4) is composed of an inner pipe (41) of the lower connecting pipe and an outer pipe (42) of the lower connecting pipe. The outer pipe (42) of the lower connecting pipe is sleeved outside the inner pipe (41) of the lower connecting pipe. The upper ends of the inner pipe (41) of the lower connecting pipe and the outer pipe (42) of the lower connecting pipe are fixedly connected. The annular cavity between the inner pipe (41) of the lower connecting pipe and the outer pipe (42) of the lower connecting pipe is an outer ring groove (43). The outer diameter of the inner pipe (41) of the lower connecting pipe is the same as the outer diameter of the drain pipe; the sliding cylinder (5) is composed of an outer pipe (51) of the sliding cylinder and an inner pipe (52) of the sliding cylinder. The outer pipe (51) of the sliding cylinder is sleeved outside the inner pipe (52) of the sliding cylinder. The lower ends of the outer pipe (51) of the sliding cylinder and the inner pipe (52) of the sliding cylinder are fixedly connected. The annular cavity between the outer pipe (51) of the sliding cylinder and the inner pipe (52) of the sliding cylinder is an inner ring groove (53). The inner diameter of the inner pipe (52) of the sliding cylinder is the same as the outer diameter of the inner pipe (41) of the lower connecting pipe. The inner pipe (52) of the sliding cylinder is slidably sleeved on the outer wall of the inner pipe (41) of the lower connecting pipe; the outer pipe (42) of the lower connecting pipe is inserted into the inner ring groove (53) and fixedly bonded by PVC edge sealing glue. The inner pipe (52) of the sliding cylinder is inserted into the outer ring groove (43). The depths of the inner ring groove (53) and the outer ring groove (43) are the same and are both the bonding length of the PVC edge sealing glue; a joint retaining ring (72) is fixedly arranged on the side wall of the bottom of the inner cavity of the joint (7). The inner cavity of the joint (7) above the joint retaining ring (72) is an upper end drain pipe insertion cavity (73). The diameter of the upper end drain pipe insertion cavity (73) is the same as the outer diameter of the drain pipe. The depth of the upper end drain pipe insertion cavity (73) is not less than the PVC glue bonding length of the drain pipe. A plug-in ring groove (71) adapted to the outer pipe (51) of the sliding cylinder is arranged in the peripheral wall of the joint (7). The upper end of the outer pipe (51) of the sliding cylinder is inserted into the plug-in ring groove (71) of the joint (7) and fixedly bonded by PVC edge sealing glue. The depth of the plug-in ring groove (71) is the bonding length of the PVC edge sealing glue.

2. The quick repair connection device for the drain pipe inside a building according to claim 1, characterized in that: A top ring (6) is arranged in the cavity of the outer pipe (51) of the sliding cylinder. The top ring (6) is located between the lower connecting pipe (4) and the joint (7). The upper port edge of the top ring (6) contacts the lower port edge of the joint (7). The lower port edge of the top ring (6) contacts the upper port edge of the lower connecting pipe (4). The length of the top ring (6) is the PVC glue bonding length of the drain pipe.

3. The rapid repair connection device for the drain pipe inside a building according to claim 2, wherein: The length of the sliding cylinder (5) is the sum of twice the bonding length of the PVC edge sealing glue, the thickness of the bottom plate of the inner ring groove (53), the thickness of the bottom plate of the outer ring groove (43), and the length of the top ring (6); the length of the lower connecting pipe (4) is the sum of the length of the sliding cylinder (5) and the PVC glue bonding length of the drain pipe; the length of the joint (7) is greater than the bonding length of the PVC edge sealing glue.

4. A rapid repair connection device for a drain pipe inside a building according to claim 2, characterized in that: The lower connecting pipe (4), the sliding cylinder (5), the top ring (6), and the joint (7) are all integrally formed by using PVC material at one time.

5. A rapid repair construction method for drainage pipes in a building, characterized in that: It includes the following steps to complete: take the rapid repair connection device for the drain pipe in the building as described in claim 1 for use; (A). First, cut above and below the damaged part of the drain pipe to obtain the upper drain pipe (2) and the lower drain pipe (1). The distance between the upper drain pipe (2) and the lower drain pipe (1) is the sum of the length of the lower connecting pipe (4), the width of the direct retaining ring (31) of the direct (3), the width of the joint retaining ring (72) of the joint (7), and the length of the top ring (6). (B). Take a direct (3) that fits the drain pipe and set it aside. Apply PVC glue on the outer wall of the pipe orifice of the lower drain pipe (1) and on the inner wall of the cavity of the direct (3) below the direct retaining ring (31), and then sleeve the lower part of the direct (3) onto the upper port of the lower drain pipe (1). (C). Apply PVC glue on the outer wall of the pipe orifice of the upper drain pipe (2) and on the inner wall of the upper drain pipe insertion cavity (73) of the joint (7), and then sleeve the upper drain pipe insertion cavity (73) of the joint (7) onto the pipe orifice of the upper drain pipe (2). (D). Apply a circle of PVC edge-sealing glue on the edge of the inner ring groove (53) of the sliding cylinder (5), and then sleeve the sliding cylinder (5) onto the lower connecting pipe (4) so that the upper end of the sliding cylinder (5) is flush with the upper end of the lower connecting pipe (4). (E). Apply PVC glue on the inner wall of the cavity of the direct (3) above the direct retaining ring (31), apply PVC glue on the outer wall of the lower end of the inner pipe (41) of the lower connecting pipe (4), and then insert the lower end of the inner pipe (41) of the lower connecting pipe into the upper port of the direct (3). (F). Apply a circle of PVC edge-sealing glue at the edge of the insertion ring groove (71) of the joint (7). (G). Place the top ring (6) between the lower connecting pipe (4) and the joint (7), slide the sliding cylinder (5) upward so that the upper end of the outer tube (51) of the sliding cylinder is inserted into the insertion ring groove (71) of the joint (7). At the same time, the outer tube (42) of the lower connecting pipe is inserted into the inner ring groove (53), and the inner tube (52) of the sliding cylinder is also inserted into the outer ring groove (43). After the PVC edge-sealing glue solidifies, the installation is completed.

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