Pipe jacking end device and pipe jacking consisting of the pipe jacking end device

Abstract

The present invention discloses a pipe jacking end device and a pipe jacking formed by the pipe jacking end device. The pipe jacking end device comprises a pipe jacking end (1), a pipe jacking groove (2) is provided on the pipe jacking end (1), a first inner pipe (6) is provided on the inner side of the pipe jacking groove (2), an annular gap (5) is provided between the first inner pipe (6) and the pipe jacking groove (2), a mud core sleeve (7) is provided in the annular gap (5), and the mud core sleeve (7) is a soft cylindrical body and is folded and sleeved on the outside of the first inner pipe (6). Compared with the prior art, the pipe jacking end device of the present invention is applied to the pipe jacking, which can greatly reduce the resistance of the mud entering the inner core of the pipe jacking during the pipe jacking operation, prevent the inner core of the pipe jacking from being blocked by mud, and the mud in the pipe core is separated from the inner wall of the pipe jacking, so it is easier to remove, which further facilitates the construction and improves the work efficiency.

Description

Technical Field

[0001] The invention relates to a pipeline construction device, in particular to a pipe jacking end device and a pipe jacking formed by the device. Background Art

[0002] In pipeline construction, pipe jacking (or pipe ramming) technology is often used.

[0003] During the pipe jacking construction process, there is often mud in the pipe core of the pipe jacking. The existence of this mud generally causes two problems: the first is that it affects the advancement of the pipe jacking. When the mud enters the inner core of the pipe jacking for a certain distance, the inner core channel of the pipe jacking is blocked, which will increase the resistance to the advancement of the pipe jacking and affect the further advancement of the pipe jacking; the second is that after the pipe jacking construction is completed, it is often necessary to remove the mud in the pipe core. For pipe jacking with a larger diameter, it is generally not difficult to remove the mud in the pipe core. When the diameter of the pipe jacking is small or the pipeline is long, it is very difficult to remove the mud in the pipe core.

[0004] CN2116138U discloses a cement pipe jacking synchronous pipe feeding and soil taking device, which realizes taking out the soil in the jacking pipe through the steel jacking head at the end of the jacking pipe, the loading and unloading soil inner pipe and the pull ring on the loading and unloading soil inner pipe, so as to facilitate construction, reduce labor intensity and improve work efficiency. However, the biggest disadvantage of this device is that it cannot solve the problem that when the soil enters the inner core of the jacking pipe for a certain distance, the inner core channel in the jacking pipe is blocked, which will increase the resistance of the jacking pipe and affect the further advancement of the jacking pipe.

[0005] Therefore, a jacking pipe end device which can reduce the resistance when the jacking pipe is advanced, especially reduce the blockage of soil in the inner core of the jacking pipe during advancement and make it easy to remove the soil in the pipe core, and a jacking pipe formed by the device. Summary of the invention

[0006] The purpose of the present invention is to provide a jacking pipe end device and a jacking pipe formed by the device, which can reduce the resistance when the jacking pipe is advanced, especially reduce the blockage of soil in the inner core of the jacking pipe during advancement, and can easily remove the soil in the pipe core.

[0007] The objective of the present invention is achieved through the following structure: a jacking pipe end device comprises a jacking head (1), a jacking pipe groove (2) is provided on the jacking head (1), the jacking pipe groove (2) is an annular groove, a first inner pipe (6) is provided on the inner side of the jacking pipe groove (2), an annular gap (5) is provided between the first inner pipe (6) and the jacking pipe groove (2), a mud core sleeve (7) is provided in the annular gap (5), the mud core sleeve (7) is a soft cylindrical body which is sleeved on the outside of the first inner pipe (6), the soft cylindrical body is longer than the length of the first inner pipe (6) and is sleeved on the outside of the first inner pipe (6) in a folded shape.

[0008] Furthermore, the outer surface of the mud core sleeve (7) is preferably non-planar, and preferably, the non-planar is a fine velvety body (72) or a protrusion (71) on the surface.

[0009] Furthermore, a second inner tube (10) is preferably provided between the first inner tube (6) and the top tube groove (2), the front end of the second inner tube (10) being movably connected to the first inner tube (6) and / or the top head (1), the annular gap (5) being provided between the first inner tube (6) and the second inner tube (10), and the length of the first inner tube (6) being shorter than that of the second inner tube (10).

[0010] Furthermore, the tail end of the second inner tube (10) is provided with an operating member (11) for the second inner tube (10), and the operating member (11) is a pull ring, a wrench, or a combination of a pull ring and a wrench connected to the tail end of the second inner tube (10), and the connection is a fixed connection or a movable connection, and the movable connection is a threaded connection or a bayonet connection, preferably a bayonet connection. The operating member (11) can be used to operate the second inner tube (10), such as installing the second inner tube (10) on the jack (1) or removing it from the jack body (9).

[0011] Furthermore, the first inner tube (6) and the mandrel (1) are preferably movably connected, and the movably connected connection is one of a threaded connection and a bayonet connection.

[0012] Furthermore, at least one of an inner retaining ring (4) and an outer retaining ring (3) is provided on the inner side of the pipe clamping groove (2) of the above-mentioned mandrel (1).

[0013] In application, the jacking pipe end head device of the present invention can be a separate product to be used in conjunction with a corresponding jacking pipe, or can be combined with a jacking pipe to form a jacking pipe.

[0014] Compared with the prior art, the jacking pipe end device of the present invention is applied to the jacking pipe, which can greatly reduce the resistance of the soil entering the inner core of the jacking pipe during the jacking operation, prevent the jacking pipe from being blocked by soil in the inner core during advancement, and the soil in the pipe core is separated from the inner wall of the jacking pipe, so it is easier to remove, which further facilitates the construction and improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of embodiment 1 of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure viewed from the right.

[0017] Figure 3 It is a schematic diagram of the structure of embodiment 2 of the present invention.

[0018] Figure 4 It is a structural diagram of embodiment 3 of the present invention.

[0019] Figure 5 It is a structural diagram of embodiment 4 of the present invention.

[0020] Figure 6 It is a structural diagram of embodiment 5 of the present invention.

[0021] Figure 7 It is a structural diagram of embodiment 6 of the present invention.

[0022] Figure 8 It is a structural diagram of Example 7 of the present invention.

[0023] As shown in the figure: 1 is the top head, 2 is the top pipe groove, 3 is the outer retaining ring, 4 is the inner retaining ring, 5 is the annular gap, 6 is the first inner pipe, 7 is the mud core sleeve, 71 is the protrusion, 72 is the fine fleece-like body, 8 is the inner core channel, 9 is the top pipe body, 10 is the second inner pipe, and 11 is the operating part. DETAILED DESCRIPTION

[0024] Preferred embodiments of the present invention are described in detail below.

[0025] Example 1: Reference Figure 1-2 , is a schematic structural diagram of embodiment 1 of the present invention, which is a jacking pipe end device, including a jacking head 1, a jacking pipe groove 2 is provided on the jacking head 1, the jacking pipe groove 2 is an annular groove, an inner retaining ring 4 is provided on the inner side of the jacking pipe groove 2, and an outer retaining ring 3 is provided on the outer side, a first inner pipe 6 is provided on the inner side of the jacking pipe groove 2, an annular gap 5 is provided between the first inner pipe 6 and the jacking pipe groove 2, a mud core sleeve 7 is provided in the annular gap 5, the mud core sleeve 7 is a soft cylindrical body sleeved outside the first inner pipe 6, the outer surface of the mud core sleeve 7 is a plane, the soft cylindrical body is longer than the length of the first inner pipe 6 and is folded outside the first inner pipe 6, and the tail end of the mud core sleeve 7 is closed.

[0026] The mud core sleeve 7 can be pre-made into a cylindrical body with a corresponding length and a closed end. Preferably, the mud core sleeve 7 is made into a longer cylindrical body, cut into a certain length as needed, and the tail end is tied into a closed shape when used.

[0027] In specific use, a lubricant, such as grease, talcum powder, etc., may be applied to the outer surface of the mud core sleeve 7 .

[0028] Example 2: Reference Figure 3, is a structural schematic diagram of Example 2 of the present invention. Compared with Example 1, the difference of this embodiment is that the surface of the outer surface of the mud core sleeve 7 is non-planar, and the non-planar shape is a tiny protrusion 71 on the surface, which can increase the elasticity of the mud core sleeve 7 body, not only can it reduce the friction between the outer surface of the mud core sleeve 7 and the top pipe 9, but also can further enhance the effect of the lubricant applied to the outer surface of the mud core sleeve 7, which can not only increase the adhesion of the lubricant and reduce the friction, but also has a slow release effect.

[0029] Example 3: Reference Figure 4 , is a schematic diagram of the structure of Example 3 of the present invention. Compared with Example 1, the difference of this embodiment is that the surface of the outer surface of the mud core sleeve 7 is non-planar, and the non-planar shape is a fine velvety body 72 on the surface.

[0030] Example 4: Reference Figure 5 , is a schematic structural diagram of Example 4 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that an outer retaining ring 3 is provided on the outer side of the top pipe groove 2.

[0031] Example 5: Reference Figure 6 , is a schematic structural diagram of Example 5 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that an inner retaining ring 4 is provided on the inner side of the top pipe groove 2.

[0032] Example 6: Reference Figure 7 , is a schematic diagram of the structure of Embodiment 6 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that the first inner tube 6 and the mandrel 1 are movably connected, and the movably connected connection is one of a threaded connection or a bayonet connection. In this embodiment, it is a threaded connection.

[0033] Example 7: Reference Figure 8 , is a structural schematic diagram of Example 7 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that a second inner tube 10 is provided between the first inner tube 6 and the top tube groove 2, the front end of the second inner tube 10 is movably connected to the first inner tube 6 and / or the top head 1, the annular gap 5 is provided between the first inner tube 6 and the second inner tube 10, and the length of the first inner tube 6 is shorter than that of the second inner tube 10.

[0034] In this embodiment, the first inner tube 6 and the mandrel 1 are connected by threads, and the first inner tube 6 and the second inner tube 10 are fixedly connected, such as by welding or riveting.

[0035] An operating member 11 for the second inner tube 10 is provided at the tail end of the second inner tube 10. The operating member 11 is a pull ring, a wrench, or a combination of a pull ring and a wrench connected to the tail end of the second inner tube 10. The connection is a fixed connection or a movable connection. The movable connection is a threaded connection or a bayonet connection, preferably a bayonet connection. The operating member 11 can be used to operate the second inner tube 10, such as installing the second inner tube 10 on the jack 1 or removing it from the jack body 9.

[0036] The above-mentioned jacking pipe end head device can be a separate product for use with a corresponding jacking pipe, or it can be combined with a jacking pipe body to form a jacking pipe, which will not be described in detail.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several changes and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A pipe jacking end device, comprising a jack (1), characterized in that: A jacking pipe groove (2) is provided on the jacking head (1), the jacking pipe groove (2) is an annular groove, a first inner pipe (6) is provided on the inner side of the jacking pipe groove (2), an annular gap (5) is provided between the first inner pipe (6) and the jacking pipe groove (2), a mud core sleeve (7) is provided in the annular gap (5), the mud core sleeve (7) is a soft cylindrical body sleeved outside the first inner pipe (6), the soft cylindrical body is longer than the first inner pipe (6) and sleeved outside the first inner pipe (6) in a folded shape; A second inner tube (10) is provided between the first inner tube (6) and the top tube groove (2), the annular gap (5) is provided between the first inner tube (6) and the second inner tube (10), and the first inner tube (6) is shorter than the second inner tube (10); The first inner tube (6) and the second inner tube (10) are fixedly connected.

2. The pipe jacking end device according to claim 1, characterized in that: The outer surface of the mud core sleeve (7) is non-planar, and the non-planar shape is fine velvet (72) or protrusions (71) on the surface.

3. The pipe jacking end device according to claim 1 or 2, characterized in that: An operating member (11) is provided at the rear end of the second inner tube (10). The operating member (11) is a pull ring, a wrench head, or a combination of a pull ring and a wrench head connected to the rear end of the second inner tube (10).

4. The pipe jacking end device according to claim 3, characterized in that: The operating member (11) is movably connected to the rear end of the second inner tube (10), and the movably connected connection is one of a threaded connection and a bayonet connection.

5. A jacking pipe, comprising a jacking pipe body (9), characterized in that: The jacking pipe body (9) is provided with the jacking pipe end head device according to any one of claims 1 to 4.

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