A buffer waterproof structure for a jacking pipe interface

Abstract

The present invention discloses a buffering waterproof structure for a top pipe interface, comprising an outer layer for sealing and waterproofing and an inner layer for buffering, the buffering waterproof structure is arranged between the front pipe section and the rear pipe section, the inner layer is arranged inside the outer layer, the inner layer comprises a rubber spring and a hollow metal sleeve, the lower part of the rubber spring is movably arranged inside the metal sleeve, a plurality of displacement angle sensors are arranged on the inner layer, and the sensors are connected to a control device. The present invention adopts a composite rubber structure for buffering and waterproofing, has an obvious buffering effect, a stable structure that is not easy to be damaged, and does not require additional waterproofing treatment, effectively solving the problems of unclear buffering effect, easy damage of pipe segments, poor waterproofing effect and short service life.

Description

Technical Field

[0001] The invention belongs to the technical field of waterproofing of jacking pipe interfaces, and in particular relates to a buffering waterproofing structure of a jacking pipe interface. Background Art

[0002] Wooden buffering waterproof structures are widely used in urban subway jacking joint structures. This method mainly uses the compressive elastic contraction of wooden boards to reduce the risk of excessive stress on the pipe joints and damage to the pipe structure during jacking. However, the elasticity of wooden boards is poor and the buffering effect is not obvious. When two pipe segments are butt-jointed, the jacking force needs to be well controlled, otherwise the pipe segments are prone to breakage. Secondly, the waterproof effect of wooden boards is poor and the service life is short, so the pipe joints need to be waterproofed separately. In view of the above problems, according to the characteristics of jacking construction, a buffering waterproof structure of the jacking joint using a composite rubber structure is designed. Summary of the invention

[0003] In view of the above-mentioned deficiencies, the present invention provides a buffering and waterproofing structure for a jacking pipe interface, which adopts a composite rubber structure for buffering and waterproofing, has obvious buffering effect, is stable and not easy to be damaged, and does not require additional waterproofing treatment, effectively solving the problems of unclear buffering effect, easy damage of pipe segments, poor waterproofing effect and short service life.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve its technical problem is: to provide a buffering and waterproof structure of a top pipe interface, including an outer layer for sealing and waterproofing and an inner layer for buffering, the buffering and waterproof structure is arranged between the front pipe section and the rear pipe section, the inner layer is arranged inside the outer layer, the inner layer includes a rubber spring and a hollow metal sleeve, the lower part of the rubber spring is movably arranged in the metal sleeve, and a plurality of displacement angle sensors are arranged on the inner layer, and the sensors are connected to the control device.

[0005] Furthermore, the upper portion of the rubber spring is cylindrical, and the lower portion is conical.

[0006] Furthermore, the outer layer is made of water-swellable rubber, and the inner layer is made of composite rubber.

[0007] Furthermore, the rubber spring has an elastic rubber layer on the outside and a spring on the inside.

[0008] Furthermore, the diameter of the rubber spring is the same as the inner diameter of the metal sleeve.

[0009] Furthermore, the cross-sections of the inner layer and the outer layer are similar to those of the front tube segment and the rear tube segment, and the cross-section of the inner layer is smaller than that of the outer layer.

[0010] Furthermore, the spring rubber can be completely compressed within the metal sleeve.

[0011] In summary, the present invention has the following advantages:

[0012] 1. The present invention adopts a composite rubber structure for buffering and waterproofing, which has obvious buffering effect, stable structure and is not easy to be damaged, and does not require additional waterproofing treatment. It has a long service life and effectively solves the problems of unclear buffering effect, easy damage of pipe segments, poor waterproofing effect and short service life. It has broad application prospects and can be promoted and used on a large scale.

[0013] 2. When in use, the buffer waterproof structure is installed between the front pipe section and the rear pipe section. The outer layer made of water-swellable rubber expands when exposed to water, plays a sealing role at the joint of the front pipe section and the rear pipe section, and also plays a certain buffering role; the rubber spring made of composite rubber is nested and connected with the metal sleeve. When the top of the rubber spring is subjected to pressure, the conical part of the lower part of the rubber spring is compressed first due to its small load area, resulting in linear compression; when the pressure increases to squeeze the lower cone into a cylinder, the pressure is borne by the upper cylindrical part, the stiffness becomes larger, and the compression generated is small; when the rubber spring is completely compressed into the metal sleeve, the force between the pipe sections is borne by the metal sleeve, and the stiffness further increases; in this way, when the top force is large, the stiffness of the rubber spring decreases to achieve a buffering effect, and when the top force is small, the stiffness increases and rebounds to tighten the pipe section sealing interface. The rubber spring provides a good buffering effect for the joint of the pipe section, avoids rigid collision between the pipe sections, and reduces the construction difficulty of the pipe section joint.

[0014] 3. The upper and lower parts of the rubber spring are cylindrical and conical respectively, which are convenient for deformation under different forces, and the buffering effect is obvious. At the same time, combined with the buffering effect of the metal sleeve, multi-level buffering can achieve a good buffering effect. The outer layer is made of water-swelling rubber, and the inner layer is made of composite rubber, which has a low cost. At the same time, due to its elastic deformation properties, it can be used repeatedly, which can significantly increase the service life of the buffer waterproof structure.

[0015] 4. A displacement angle sensor is also provided on the inner layer of the buffer waterproof structure. The sensor can obtain the displacement angle information of the pipe section during the jacking process and transmit it to the control device. The jacking force can be adjusted in the reverse direction. At the same time, the jacking direction is adjusted using a correction oil pump based on the information obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the use of the buffer waterproof structure;

[0017] Figure 2 It is a schematic diagram of the buffer waterproof structure;

[0018] Figure 3 This is a schematic diagram of the setting of the rubber spring;

[0019] Figure 4 It is a schematic diagram of the compression of the rubber spring;

[0020] Among them, 1. front pipe section; 2. rear pipe section; 3. buffer waterproof structure; 4. outer layer; 5. inner layer; 6. displacement angle sensor; 7. rubber spring; 8. metal sleeve. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In one embodiment of the present invention, Figure 1-4 As shown, a buffering and waterproofing structure of a top pipe interface is provided, including an outer layer 4 for sealing and waterproofing and an inner layer 5 for buffering, the cross-sections of the inner layer 5 and the outer layer 4 are similar to those of the front pipe segment 1 and the rear pipe segment 2, and the cross-section of the inner layer 5 is smaller than that of the outer layer 4, the outer layer 4 is made of water-swellable rubber, and the inner layer 5 is made of composite rubber, the buffering and waterproofing structure 3 is arranged between the front pipe segment 1 and the rear pipe segment 2, and the inner layer 5 is arranged inside the outer layer 4; the inner layer 5 includes a rubber spring 7 and a hollow metal sleeve 8, the upper part of the rubber spring 7 is cylindrical, and the lower part is conical, the lower part of the rubber spring 7 is movably arranged in the metal sleeve 8, the diameter of the rubber spring 7 is the same as the inner diameter of the metal sleeve 8, the outer part of the rubber spring 7 is an elastic rubber layer, and the inner part is a spring, and a plurality of MCJSI420A displacement angle sensors 6 are arranged on the inner layer 5, and the sensors are connected to a control device, and the control device can be a computer or PLC control, etc.

[0023] When in use, the buffer waterproof structure 3 is installed between the front pipe section 1 and the rear pipe section 2. The outer layer 4 made of water-swellable rubber expands when exposed to water, plays a sealing role at the joint of the front pipe section 1 and the rear pipe section 2, and also plays a certain buffering role; the rubber spring 7 made of composite rubber is nested and connected with the metal sleeve 8. When the top of the rubber spring 7 is subjected to pressure, the conical part of the lower part of the rubber spring 7 is compressed first due to its small load-bearing area, resulting in linear compression; when the pressure increases to squeeze the lower cone into a cylinder, the pressure is borne by the upper cylindrical part, the rigidity becomes larger, and the amount of compression generated is small; when the rubber spring 7 After being completely compressed into the metal sleeve 8, the force between the pipe sections is borne by the metal sleeve 8, and the rigidity is further increased; in this way, when the jacking force is large, the rigidity of the rubber spring 7 decreases to achieve a buffering effect, and when the jacking force is small, the rigidity increases and rebounds to tighten the sealing interface of the pipe section. The rubber spring 7 provides a good buffering effect for the joints of the pipe sections, avoids rigid collisions between the pipe sections, and reduces the construction difficulty of the pipe section joints; the displacement angle sensor 6 can obtain the displacement angle information of the pipe section during the jacking process and transmit it to the control device, and can thereby reversely adjust the jacking force. At the same time, according to the information obtained, the correction oil pump is used to adjust the jacking direction.

[0024] The present invention adopts a composite rubber structure for buffering and waterproofing, has obvious buffering effect, stable structure and is not easy to be damaged, and does not require additional waterproofing treatment, effectively solving the problems of unclear buffering effect, easy damage of pipe segments, poor waterproofing effect and short service life.

[0025] Although the specific implementation of the present invention is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A buffer waterproof structure for a jacking pipe interface, characterized in that: It comprises an outer layer (4) for sealing and waterproofing and an inner layer (5) for buffering, wherein the buffering and waterproofing structure (3) is arranged between the front pipe section (1) and the rear pipe section (2), the inner layer (5) is arranged inside the outer layer (4), the inner layer (5) comprises a rubber spring (7) and a hollow metal sleeve (8), the lower part of the rubber spring (7) is movably arranged inside the metal sleeve (8), and a plurality of displacement angle sensors (6) are arranged on the inner layer (5), and the displacement angle sensors (6) are connected to a control device; The rubber spring (7) has a cylindrical upper portion and a conical lower portion; The material of the outer layer (4) is water-swellable rubber, and the material of the inner layer (5) is composite rubber; The rubber spring (7) has an elastic rubber layer on the outside and a spring on the inside; The rubber spring (7) can be completely compressed inside the metal sleeve (8).

2. The buffer waterproof structure of the top pipe interface according to claim 1, characterized in that: The cross-sections of the inner layer (5) and the outer layer (4) are similar to those of the front pipe section (1) and the rear pipe section (2), and the cross-section of the inner layer (5) is smaller than that of the outer layer (4).

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