Inflatable rubber plug for prestressed pipe pile

Abstract

The utility model relates to the technical field of tubular pile production, in particular to an inflatable rubber plug for a prestressed tubular pile. The inflatable rubber plug for the prestressed pipe pile comprises a central pipe, an upper flange plate, a lower flange plate and an annular air bag, the upper flange plate is located above the lower flange plate, and the central pipe is connected with the upper flange plate and / or the lower flange plate. A closed inner cavity space is defined by the upper flange plate, the lower flange plate and the inner wall of the air bag. The central pipe is provided with a ventilation channel which is communicated with the inner cavity space; an inflation inlet is formed in the ventilation channel; the air bag has an inflation state and a deflation state; in a deflation state, the outer diameter of the airbag is smaller than the aperture of the central hole; in the inflated state, the outer diameter of the inflated and expanded air bag is larger than or equal to the hole diameter of the center hole. In this way, the center hole of the tail plate can be efficiently and rapidly blocked or separated, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pile production, in particular to an inflatable rubber plug for prestressed pipe piles. Background Art

[0002] Prestressed pipe piles are mainly used for low-bearing pile foundations of industrial and civil buildings, and are widely used in the foundations of railways, highways and bridges, municipal and large-scale equipment projects. They have high strength, strong bearing capacity, and strong adaptability to geological structures. The general method of making reinforced concrete prestressed pipe piles is: the steel cage is placed in a mold, concrete is poured into the mold, and then centrifugal molding is performed.

[0003] The existing mold is divided into an upper mold and a lower mold, which are fixedly connected by bolts. The head and tail ends of the mold are provided with a head plate and a tail plate with a hole in the center. When laying the material, the concrete is pumped in through the pump pipe inserted into the hole of the tail plate. After the pump pipe is pulled out, a rubber plug is inserted into the hole of the tail plate to prevent the concrete from flowing out.

[0004] The diameter of the rubber plug in the existing technology is larger than the diameter of the center hole of the tail plate, and it has an interference fit with the center hole of the tail plate of the pipe mold. It needs to be pushed in by a strong external force or hammered in manually. The equipment is bulky and has a complex structure, occupies a large space and has high energy consumption. Manual operation is labor-intensive, the rubber plug is severely worn and has a short service life. Utility Model Content

[0005] The purpose of the present invention includes, for example, providing an inflatable rubber plug for a prestressed pipe pile, which can efficiently and quickly seal or detach the central hole of the tail plate, and has a simple structure and is easy to operate.

[0006] The embodiment of the present utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides an inflatable rubber plug for a prestressed pipe pile, which cooperates with the center hole of a tail plate, comprising:

[0008] Center tube, upper flange, lower flange and annular air bag;

[0009] The upper flange is located above the lower flange, and the central pipe is connected to the upper flange and / or the lower flange;

[0010] The periphery of the upper flange and the periphery of the lower flange form an annular opening; the airbag is arranged in the annular opening, and the upper flange, the lower flange, and the inner wall of the airbag form a closed inner cavity space;

[0011] The central tube has a ventilation channel, which is in communication with the inner cavity space; the ventilation channel is provided with an inflation port, which can be used to connect to an air source to inflate the airbag;

[0012] The airbag has an inflated state and a deflated state; in the deflated state, the outer diameter of the airbag is smaller than the aperture of the central hole; in the inflated state, the outer diameter of the airbag after inflation is greater than or equal to the aperture of the central hole.

[0013] In an optional embodiment, it further comprises an inflation nozzle, wherein the inflation nozzle is detachably arranged at the inflation port;

[0014] The inflation nozzle has a pressure-maintaining structure so that the air pressure in the inner cavity space remains unchanged after the air source is removed from the inflation port.

[0015] In an optional embodiment, the upper flange and the lower flange remain parallel to each other.

[0016] In an optional embodiment, the upper flange and the lower flange are arranged concentrically.

[0017] In an optional embodiment, the upper flange and the lower flange have the same shape, and the orthographic projection of the upper flange and the orthographic projection of the lower flange coincide with each other.

[0018] In an optional embodiment, the airbag is made of rubber.

[0019] In an optional embodiment, a vent hole is provided on the central tube, the vent hole is located in the portion of the central tube located in the inner cavity space, and the vent hole can connect the inner cavity space and the ventilation channel.

[0020] In an optional embodiment, a first through hole is opened in the center of the upper flange, and the central tube passes through the first through hole and extends into the inner cavity space; and the outer wall of the central tube is tightly connected to the first through hole.

[0021] In an optional embodiment, a second through hole is opened in the center of the lower flange, the end of the central tube passes through the first through hole and the second through hole in sequence, and the outer wall of the central tube is tightly connected to the first through hole and the second through hole.

[0022] In an optional embodiment, the bottom of the central tube is flush with the ground of the lower flange.

[0023] The beneficial effects of the embodiments of the present invention include, for example:

[0024] The inflatable rubber plug for prestressed pipe piles of this solution includes a center tube, an upper flange, a lower flange, and an airbag. The upper flange and the lower flange are spaced apart, and the airbag is arranged on the periphery of the upper and lower flanges to enclose and form a closed inner cavity space. The center tube is connected to the upper and lower flanges, and the center tube is connected to the inner cavity space so that the airbag can be inflated. Because the outer diameter of the airbag is smaller than the aperture of the center hole in the deflated state, it is easy to place the airbag on the center hole of the enclosure. When the airbag is inflated, the upper and lower flanges at both ends of the airbag in the axial direction can limit the extension direction of the airbag, so that after inflation, the airbag will only expand radially in all directions. If the outer diameter of the inflated airbag is greater than or equal to the aperture of the center hole, the center hole of the tail plate can be blocked. After the blocking is completed, the compressed air in the airbag is released through the inflation nozzle to shrink the airbag, and the rubber plug can be easily pulled out of the center hole of the tail plate of the pipe mold. In summary, such an inflatable rubber plug for prestressed pipe piles has a simple structure, occupies a small space, is light and compact, has low energy consumption, and has low labor intensity in manual operation, thereby extending the service life of the rubber plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of an inflatable rubber plug for a prestressed pipe pile according to an embodiment of the utility model;

[0027] Figure 2 This is a cross-sectional view of an inflatable rubber plug for prestressed pipe piles according to an embodiment of the present utility model.

[0028] Icons: 11-annular opening; 12-inner cavity space; 13-inflating nozzle; 14-curling groove; 100-center tube; 110-ventilation channel; 120-inflating port; 130-vent hole; 200-upper flange; 210-first through hole; 300-lower flange; 320-second through hole; 400-airbag. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0035] The existing rubber plugs all have a larger diameter than the diameter of the center hole of the tail plate, and are interference fit with the center hole of the tail plate of the pipe mold. They need to be pushed in with a strong external force or hammered in manually. The equipment is bulky and has a complex structure, occupies a large space and has high energy consumption. Manual operation is labor-intensive, the rubber plugs are severely worn and have a short service life.

[0036] In order to improve the above technical problems, an inflatable rubber plug for a prestressed pipe pile is provided in the following embodiment.

[0037] Please refer to Figure 1 and 2 This embodiment provides an inflatable rubber plug for a prestressed pipe pile, which cooperates with the center hole of the tail plate, including:

[0038] Central tube 100, upper flange 200, lower flange 300 and annular air bag 400;

[0039] The upper flange 200 is located above the lower flange 300, and the central pipe 100 is connected to the upper flange 200 and / or the lower flange 300;

[0040] The periphery of the upper flange 200 and the periphery of the lower flange 300 enclose an annular opening 11; the airbag 400 is disposed in the annular opening 11, and the inner walls of the upper flange 200, the lower flange 300, and the airbag 400 enclose a sealed inner cavity 12;

[0041] The central tube 100 has a ventilation channel 110, which is in communication with the inner cavity 12; the ventilation channel 110 is provided with an inflation port 120, which can be used to connect to an air source to inflate the airbag 400;

[0042] The airbag 400 has an inflated state and a deflated state; in the deflated state, the outer diameter of the airbag 400 is smaller than the aperture of the center hole; in the inflated state, the outer diameter of the airbag 400 after inflation is greater than or equal to the aperture of the center hole.

[0043] The inflatable rubber plug for prestressed pipe piles of this embodiment includes a central tube 100, an upper flange 200, a lower flange 300, and an airbag 400. The upper and lower flanges 200 and 300 are spaced apart, and the airbag 400 is positioned around the edges of the upper and lower flanges 300, enclosing a sealed inner cavity 12. The central tube 100 is connected to the upper and lower flanges 300, and the central tube 100 communicates with the inner cavity 12 to allow inflation of the airbag 400. Because the outer diameter of the airbag 400 is smaller than the diameter of the center hole when deflated, the airbag 400 can be easily placed over the center hole of the enclosure. When the airbag 400 is inflated, the upper and lower flanges 300 at both ends of the airbag 400 in the axial direction can limit the extension direction of the airbag 400, so that after inflation, the airbag 400 will only expand radially in all directions. Furthermore, if the outer diameter of the inflated airbag 400 is greater than or equal to the diameter of the center hole, the center hole of the tail plate can be blocked. After the blocking is completed, the compressed air in the airbag 400 is released through the inflation nozzle 13 to shrink the airbag 400, and the plug can be easily pulled out of the center hole of the tail plate of the pipe mold. In summary, such an inflatable plug for prestressed pipe piles has a simple structure, occupies a small space, is lightweight and compact, consumes little energy, and has low labor intensity for manual operation, thereby extending the service life of the plug.

[0044] Please continue reading Figure 1 and Figure 2 , to learn more structural details of the inflatable rubber plug for prestressed pipe piles.

[0045] Optionally, the central tube 100 is a cylindrical metal tube. The central tube 100 is a seamless tube with one end sealed and the other end having a threaded inlet 120 for mounting the inflating nozzle 13. A vent hole 130 is also provided in the tube. The upper flange 200 and the lower flange 300 are both circular plates made of metal.

[0046] In an optional embodiment, a vent hole 130 is provided on the central tube 100. The vent hole 130 is located in the portion of the central tube 100 located in the inner cavity space 12, and the vent hole 130 can connect the inner cavity space 12 and the ventilation channel 110. The provision of the vent hole 130 can conveniently connect the inner cavity space 12 and the ventilation channel 110, and such a provision method has a simple structure and is easy to manufacture. Optionally, at least one vent hole 130 is provided at the end of the central tube 100 located in the inner cavity space 12, and multiple vent holes 130 are evenly distributed circumferentially on the central tube 100. This facilitates uniform pressure on the peripheral portions of the inner cavity, thereby ensuring that the airbag 400 can be uniformly expanded or contracted, thereby facilitating the extension of the service life of the airbag 400 and ensuring that the central hole is evenly blocked.

[0047] In an optional embodiment, the inflatable rubber plug for prestressed pipe piles further includes an inflation nozzle 13, which is detachably mounted on the inflation port 120. The inflation nozzle 13 has a pressure-maintaining structure to maintain the pressure in the inner cavity 12 after the air source is removed from the inflation port 120. It should be noted that the pressure-maintaining structure of the inflation nozzle 13 is conventional, such as a tire valve, and will not be described in detail here.

[0048] Furthermore, along the length direction of the central tube 100 , the vent hole 130 is located at one end of the central tube 100 , and the inflation nozzle 13 is located at the other end of the central tube 100 away from the airbag 400 .

[0049] It can also be seen from the figure that in an optional embodiment, the upper flange 200 and the lower flange 300 remain parallel to each other. This allows for a uniform gap between the upper flange 200 and the lower flange 300, thereby ensuring uniform expansion of the airbag 400 during inflation.

[0050] In an alternative embodiment, the upper flange 200 and the lower flange 300 are arranged concentrically. This allows for easy alignment of the annular opening 11 with the airbag 400. Furthermore, in an alternative embodiment, the upper flange 200 and the lower flange 300 have the same shape, and the orthographic projection of the upper flange 200 and the orthographic projection of the lower flange 300 overlap. This ensures that the peripheries of the upper flange 200 and the lower flange 300 are identical, allowing the airbag 400 to be easily connected to the annular opening 11. Furthermore, the inner wall of the airbag 400 is more evenly stressed during inflation.

[0051] In an optional embodiment, the material of the airbag 400 is rubber. It is easy to understand that the airbag 400 can also be made of other elastic or telescopic materials, or other shrinkable and expandable mechanisms.

[0052] from Figure 2It can also be seen that in an optional embodiment, a first through hole 210 is opened in the center of the upper flange 200, and the central tube 100 extends into the inner cavity space 12 after passing through the first through hole 210; and the outer wall of the central tube 100 is tightly connected to the first through hole 210.

[0053] Furthermore, in an optional embodiment, a second through-hole 320 is defined in the center of the lower flange 300. The ends of the center tube 100 extend sequentially through the first and second through-holes 210, 320, and the outer wall of the center tube 100 is tightly connected to the first and second through-holes 210, 320. In this manner, the center tube 100 allows for stable installation of the upper and lower flanges 200, 300, with the gap between the upper and lower flanges 200, 300 being uniform throughout. Alternatively, the first and second through-holes 210, 320 are welded to the outer wall of the center tube 100.

[0054] In an optional embodiment, the bottom of the central tube 100 is flush with the ground of the lower flange 300. This reduces the volume of the inflatable rubber plug for the prestressed pile and facilitates reducing the ventilation path of the ventilation channel 110 of the central tube 100, thereby improving the utilization efficiency of the air source.

[0055] It can also be seen from the figure that the ends of the upper flange 200 and the lower flange 300 facing the inner cavity space 12 are both provided with curling grooves 14 ; the periphery of the airbag 400 can be rolled up in the curling grooves 14 .

[0056] The working principle of the inflatable rubber plug for prestressed pipe piles is as follows:

[0057] 1) Before the inflatable rubber plug is inflated, the diameter of the airbag 400 is slightly smaller than the center hole of the tube mold tail plate, and the uninflated airbag 400 can be compressed and deformed. When the rubber plug is inserted, there is no friction with the surrounding area of ​​the tube mold tail plate hole, and the rubber plug can be easily inserted.

[0058] 2) Use compressed air to inflate the airbag 400 through the inflation nozzle 13. After the airbag 400 expands, it blocks the central hole of the tail plate of the tube mold. When the predetermined pressure is reached, the air source is removed and the inflation nozzle 13 automatically closes to maintain pressure, so that the rubber plug can continue to maintain the sealing.

[0059] 3) After the plugging is completed, the compressed air in the airbag 400 is released through the inflation nozzle 13 to shrink the airbag 400, and the rubber plug can be easily pulled out of the center hole of the tail plate of the pipe mold.

[0060] In summary, the embodiments of the present invention provide an inflatable rubber plug for prestressed pipe piles, which has at least the following advantages:

[0061] When the airbag 400 is inflated, the upper and lower flanges 300 at both ends of the airbag 400 in the axial direction can limit the extension direction of the airbag 400, so that after inflation, the airbag 400 will only expand radially in all directions. Furthermore, if the outer diameter of the inflated airbag 400 is greater than or equal to the diameter of the center hole, the center hole of the tail plate can be blocked. After the blocking is completed, the compressed air in the airbag 400 is released through the inflation nozzle 13 to shrink the airbag 400, and the plug can be easily pulled out of the center hole of the tail plate of the pipe mold. In summary, such an inflatable plug for prestressed pipe piles has a simple structure, occupies a small space, is lightweight and compact, consumes little energy, and has low labor intensity for manual operation, thereby extending the service life of the plug.

[0062] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. An inflatable rubber plug for prestressed pipe piles, which fits into the center hole of the tail plate and is characterized by: include: A central tube (100), an upper flange (200), a lower flange (300) and an annular air bag (400); The upper flange (200) is located above the lower flange (300), and the central pipe (100) is connected to the upper flange (200) and / or the lower flange (300); The periphery of the upper flange (200) and the periphery of the lower flange (300) enclose an annular opening (11); the airbag (400) is arranged in the annular opening (11), and the inner walls of the upper flange (200), the lower flange (300), and the airbag (400) enclose a closed inner cavity space (12); The central tube (100) has a ventilation channel (110), and the ventilation channel (110) is in communication with the inner cavity space (12); the ventilation channel (110) is provided with an inflation port (120), and the inflation port (120) can be used to connect to an air source to inflate the airbag (400); The airbag (400) has an inflated state and a deflated state; in the deflated state, the outer diameter of the airbag (400) is smaller than the aperture of the central hole; in the inflated state, the outer diameter of the airbag (400) after inflation is greater than or equal to the aperture of the central hole.

2. The inflatable rubber plug for prestressed pipe piles according to claim 1, characterized in that: It also includes an inflation nozzle (13), wherein the inflation nozzle (13) is detachably arranged on the inflation port (120); The inflation nozzle (13) has a pressure-maintaining structure so that the air pressure in the inner cavity space (12) remains unchanged after the air source is removed from the inflation port (120).

3. The inflatable rubber plug for prestressed pipe piles according to claim 1, characterized in that: The upper flange (200) and the lower flange (300) remain parallel to each other.

4. The inflatable rubber plug for prestressed pipe piles according to claim 1, characterized in that: The upper flange (200) and the lower flange (300) are arranged concentrically.

5. The inflatable rubber plug for prestressed pipe piles according to claim 4, characterized in that: The upper flange (200) and the lower flange (300) have the same shape, and the orthographic projection of the upper flange (200) and the orthographic projection of the lower flange (300) coincide with each other.

6. The inflatable rubber plug for prestressed pipe piles according to claim 1, characterized in that: The material of the airbag (400) is rubber.

7. The inflatable rubber plug for prestressed pipe piles according to claim 1, characterized in that: The central tube (100) is provided with a vent hole (130), the vent hole (130) is located at the portion of the central tube (100) located in the inner cavity space (12), and the vent hole (130) is capable of connecting the inner cavity space (12) and the ventilation channel (110).

8. The inflatable rubber plug for prestressed pipe piles according to any one of claims 1 to 7, characterized in that: A first through hole (210) is provided at the center of the upper flange (200), and the central tube (100) passes through the first through hole (210) and extends into the inner cavity space (12); and the outer wall of the central tube (100) is tightly connected to the first through hole (210).

9. The inflatable rubber plug for prestressed pipe piles according to claim 8, characterized in that: A second through hole (320) is provided at the center of the lower flange (300), and the end of the central tube (100) passes through the first through hole (210) and the second through hole (320) in sequence, and the outer wall of the central tube (100) is tightly connected to the first through hole (210) and the second through hole (320).

10. The inflatable rubber plug for prestressed pipe piles according to claim 9, characterized in that: The bottom of the central pipe (100) is flush with the ground of the lower flange (300).

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