Intermediate jacking station

Abstract

The utility model discloses an intermediate jacking station which solves the problems that in the prior art, hard rock or composite stratum construction gravel slag flows backwards and enters a sealing area to damage sealing, so that water leakage and slurry leakage are caused, a front shell and a rear shell are difficult to shrink after slag accumulation, and friction resistance is increased after pipe joints are tightly held by the crushed slag. The steel plate brush comprises a front shell and a rear shell which are in socket connection, an oil cylinder corresponding to the front shell is arranged in the rear shell, a sealing piece is arranged between socket parts of the front shell and the rear shell, a steel plate brush assembly is arranged on the outer wall of the front shell, and a scraper brush assembly corresponding to the rear shell is arranged on the rear portion of the front shell. According to the utility model, the steel plate brush assembly is arranged on the outer wall of the front shell, so that disintegrating slag can be prevented from flowing towards the intermediate jacking station and the rear pipe joint, on one hand, the phenomenon that the disintegrating slag flows towards a cavity between the front shell and the rear shell of the intermediate jacking station can be reduced, the risk of sealing damage is reduced, and on the other hand, the effect of reducing frictional resistance in the construction process can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a relay room. Background Art

[0002] The relay room is a key equipment in the long-distance pipe jacking construction process. When the jacking force of the pipe jacking machine is insufficient or exceeds the bearing capacity of the supporting equipment, the relay room needs to be activated to complete the tunnel forming through relay jacking.

[0003] At present, when the pipe jacking machine is excavating in hard rock or composite formations, the stone slag and other debris produced by the excavation and grinding of the cutter head will accumulate with the jacking of the equipment, thereby holding the pipe joint tightly, resulting in excessive jacking force and failure to jack normally. In addition, when the relay room is activated, the front and rear shells move back and forth relative to each other. During this process, the crushed stone slag between the front and rear shells will produce greater resistance, making it difficult for the relay room to shrink. Moreover, when the crushed stone slag reaches the sealing area, it will also damage the seal, causing the seal to fail, resulting in water leakage, slurry leakage, etc.

[0004] In recent years, with the development of pipe jacking technology, relevant research on pipe jacking machines in hard rock formations has gradually emerged, such as a tool section for long-distance rock pipe jacking with application number 202221414680.8, which has a rock chip blocking part installed on the rear shell. Although it can reduce friction resistance, etc., it cannot prevent the front rock chips from entering the sealing area because it is set at the rear end of the sealing area, and there is still a risk of sealing leakage. The application number is 202111336092.7, a long-distance pipe jacking device and construction method for crossing a water-rich broken formation in a curve. A shield tail brush is provided on the outer wall of the tail of the machine. One of its functions is to prevent the slag from sliding back, and the other is to play a role in retaining slurry. However, the slag blocking effect of a single shield tail brush is limited, and there is still small slag moving backwards, which affects the seal of the relay room. The relay room and pipe jacking machine with application number 202211434062.4 have seals between the front and rear shells of the relay room, which is convenient for reducing the risk of water leakage and slurry leakage when constructing permanent structures. However, the seals are relatively fixed to the rear shell, and the relay room cannot play the role of sealing the area from being affected by rock debris when it is activated. In summary, it is necessary to design a relay room that can solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a relay room, which solves the problems in the prior art that crushed stone slag during construction of hard rock or composite formations flows backwards and enters the sealing area to destroy the seal and cause water leakage and slurry leakage, the front and rear shells become difficult to shrink after slag accumulation, and the crushed stone slag holds the pipe joints tightly, causing increased friction resistance.

[0006] The technical solution of the utility model is implemented as follows: a relay room includes a front shell and a rear shell connected by sockets, an oil cylinder corresponding to the front shell is arranged in the rear shell, a seal is provided between the socket parts of the front shell and the rear shell, a steel plate brush assembly is arranged on the outer wall of the front shell, and a scraper brush assembly corresponding to the rear shell is arranged at the rear of the front shell.

[0007] Further preferably, the rear portion of the front shell and the front portion of the rear shell are in socket-and-socket fit; and the sealing member is located between the rear portion of the front shell and the front portion of the rear shell.

[0008] Further preferably, at least one annular groove is provided on the outer wall of the front portion of the rear shell body, and the sealing member is located in the groove.

[0009] Further preferably, a flushing port is provided at the front portion of the rear shell, and a plug is detachably provided on the flushing port.

[0010] Further preferably, the steel plate brush assembly includes a base plate fixed on the front outer wall of the front shell body, the base plate is connected to the steel plate brush via a shaft, and the steel plate brush is pressed and fixed by a cover plate.

[0011] Further preferably, the shaft is a pin, which passes through a positioning hole on the steel plate brush and is respectively welded and fixed to the bottom plate and the cover plate; the bottom plate is located in a positioning groove provided on the outer wall of the front shell body and is welded and fixed to the outer wall of the front shell body.

[0012] Further preferably, the steel plate brush is composed of several layers of upwardly bent steel plates, and each layer of steel plates is installed with staggered seams.

[0013] Further preferably, the scraper brush assembly includes a round steel fixed to the inner wall of the rear portion of the front housing, a scraper is fixed to the round steel, one end of the scraper is fixedly connected to the round steel, and the other end is in contact with the outer wall of the rear housing.

[0014] Further preferably, the round steel includes a plurality of segmented round steels, the scraper includes a plurality of segmented scrapers, the length of the segmented round steel is smaller than the width of the segmented scraper, and two adjacent segmented scrapers are installed in an overlapping manner.

[0015] Further preferably, the oil cylinder is fixed by a clamp fixed on the inner wall of the rear shell body, and the oil cylinder is connected to the hydraulic power source through a pipeline.

[0016] The beneficial effects of the utility model are as follows: the utility model can prevent debris from flowing toward the relay room and the rear pipe section by setting a steel plate brush assembly on the outer wall of the front shell. First, it can reduce the flow of debris into the cavity between the front and rear shells of the relay room, thereby reducing the risk of seal damage, and second, it can reduce the friction resistance during construction. A scraper brush assembly is set at the rear of the front shell corresponding to the rear shell. The scraper brush prevents debris from entering the middle cavity of the front and rear shells when the relay room is not enabled. After the relay room is enabled, it can remove the accumulated debris in the cavity, protect the seal and ensure the normal contraction of the front and rear shells of the relay room, solving the problem of difficulty in contracting the front and rear shells. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a partial enlarged view of the socket of the front shell and the rear shell.

[0020] Figure 3 for Figure 2 A partial enlarged view of point Ⅰ in the middle.

[0021] Figure 4 for Figure 2 A partial enlarged view of point II in the middle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1As shown, in Example 1, a relay room comprises a front shell 1 and a rear shell 7 connected by a socket connection, and preferably the front part of the rear shell is plugged into the rear part of the front shell. An oil cylinder 4 corresponding to the front shell 1 is provided in the rear shell 7, and a plurality of oil cylinders 4 are arranged along the circumference of the back cover. When the relay room is activated, the front shell 1 and the rear shell 7 can realize relative reciprocating motion through the extension and contraction of the oil cylinder 4. The seal 3 between the socket parts of the front shell 1 and the rear shell 7 plays a sealing role when the front shell 1 and the rear shell 7 of the relay room reciprocate. The seal has a certain amount of compression during the installation process, which is used to press the gap between the front and rear shells. When there is gravel in the gap, it will bring two risks. One is damage to the seal, and the other is that after slag accumulates in the gap between the front and rear shells, the front and rear shells of the relay room will be unable to shrink. A steel plate brush assembly 2 is provided on the outer wall of the front housing 1, and the steel plate brush assembly 2 is fixedly arranged outside the front end of the front housing 1 to prevent the crushed stone slag generated by the excavation and grinding of the cutter disc from flowing to the rear of the relay room; a scraper brush assembly 6 corresponding to the rear housing 7 is provided at the rear of the front housing 1. The scraper brush assembly 6 is fixedly arranged inside the rear end of the front housing 1 and is in close contact with the rear housing 7, which plays a role in preventing the crushed stone chips from entering the sealing area and damaging the seal 3 during the reciprocating movement of the front housing 1 and the rear housing 7.

[0024] like Figure 3 As shown, embodiment 2: Based on embodiment 1, this embodiment is further optimized: the steel plate brush assembly 2 in this embodiment includes a bottom plate 201 fixed on the front outer wall of the front housing 1, and the bottom plate can be fixed on the front outer wall of the front housing 1 by welding. A steel plate brush 204 is connected to the bottom plate 201 through a shaft 202, and the steel plate brush 204 is pressed and fixed by a cover plate 203. The shaft is used to position the steel plate brush on the bottom plate, and the cover is used to fix the shaft and the steel plate brush at the same time to ensure its stability.

[0025] In this embodiment, as a preferred solution, the shaft member 202 is a pin, which passes through the positioning hole on the steel plate brush 204 and is respectively welded and fixed to the bottom plate 201 and the cover plate 203, playing the role of fixing the steel plate brush 204. The cover plate 203 is fixedly connected to the front housing, the pin, and the bottom plate by welding, playing the role of pressing the steel plate brush 204. In addition, the shaft member can also be a bolt member, and the cover plate uses a corresponding nut member, and the nut member and the bolt member are threadedly matched to play the role of pressing the steel plate.

[0026] The bottom plate 201 in this embodiment is located in the positioning groove 205 provided on the outer wall of the front shell 1 and is welded and fixed to the outer wall of the front shell 1; the positioning groove plays the role of limiting the bottom plate to ensure the firmness of the welding with the outer wall of the front shell. In actual construction, the bottom plate 201, the cover plate 203, and the steel plate brush 204 are divided into several pieces and are evenly arranged in the positioning groove at the front end of the front shell 1, which is convenient for disassembly, assembly and replacement.

[0027] In this embodiment, as a preferred solution, the steel plate brush 204 is composed of several layers of upwardly curved steel plates, each layer of which is installed with staggered seams to improve the slag blocking performance. Several layers of steel plates are placed between the bottom plate and the cover plate at the same time, fixed by pins, and then pressed by the cover plate to prevent the crushed stone slag generated by the cutter head excavation and grinding from flowing to the rear of the relay room.

[0028] like Figure 4 As shown, Example 3: Based on Example 1 or 2, this example is further optimized: the scraper brush assembly 6 includes a round steel 601 fixed to the inner wall of the rear part of the front housing 1, and the round steel 601 is preferably fixedly connected to the inside of the rear end of the front housing 1 by welding. A scraper 602 is fixed to the round steel 601, and the scraper is preferably fixed to the round steel by welding. One end of the scraper 602 is fixedly connected to the round steel 601, and the other end is in contact with the outer wall of the rear housing 7. That is, the scraper 602 is in close contact with the outside of the rear housing 7 after installation.

[0029] As a further preference, the round steel 601 includes a plurality of segmented round steels, and the scraper 602 includes a plurality of block scrapers. The segmented round steels correspond to the block scrapers one by one, and the length of the segmented round steels is smaller than the width of the block scrapers. Two adjacent block scrapers are installed in an overlapping manner, which effectively prevents debris and stone chips from entering the sealing area between the front shell body 1 and the rear shell body 7 during the reciprocating movement of the front shell body 1 and the rear shell body 7.

[0030] like Figure 2 As shown, embodiment 4: Based on embodiment 2 or 3, this embodiment is further optimized: in this embodiment, the oil cylinder 4 is fixed by a clamp 5 fixed on the inner wall of the rear housing 7, and the oil cylinder 4 is connected to the hydraulic power source 8 through a pipeline to provide power for the contraction of the oil cylinder 4. The clamp 5 is detachably connected to the rear housing 7 by screws, which is convenient for quickly fixing and removing the oil cylinder 4. That is, one end of the oil cylinder 4 is in contact with the rear housing 7, and the other end can float or contact with the front housing 1 and be set on the rear housing through the clamp 5. Through the expansion and contraction of the oil cylinder 4, the reciprocating motion of the front housing 1 and the rear housing 7 can be realized.

[0031] In this embodiment, the rear portion 1-1 of the front housing 1 and the front portion 7-1 of the rear housing 7 are socket-fitted to form a sealing area; the sealing member 3 is located between the rear portion 1-1 of the front housing 1 and the front portion 7-1 of the rear housing 7 to play a sealing role. At least one annular groove is provided on the outer wall of the front portion 7-1 of the rear housing 7, and the sealing member 3 is located in the groove, which plays a role in positioning the sealing member. The sealing member can be a sealing ring, which plays a sealing role when the front housing 1 and the rear housing 7 of the relay room reciprocate.

[0032] The front part 7-1 of the rear shell 7 in this embodiment is provided with a flushing port, and a plug 701 is detachably provided on the flushing port. In actual construction, friction-reducing mud or the like can be injected into the outside of the relay room through the flushing port to reduce the friction resistance during the jacking process of the jacking pipe. At the same time, the slurry is filled between the front shell 1 and the rear shell 7 of the relay room, and it can also prevent the broken stones from entering the cavity, thereby improving the service life of the seal 3. If the flushing port is not used, it can be blocked with a plug 701.

[0033] The utility model can block part of the crushed stone slag generated by the excavation and grinding of the cutter disc from flowing to the rear of the relay room by fixing a steel plate brush on the outside of the front end of the front shell. Firstly, it can reduce the movement of crushed stone to the sealing area, playing an auxiliary role in protecting the seal, and secondly, it can reduce the slag sliding to the pipe section at the rear end of the relay room, thereby playing a role in reducing frictional resistance. By fixing a scraper brush on the inside of the rear end of the front shell, the scraper brush moves with the front shell during the reciprocating movement of the front shell and the rear shell. There are media such as mud and stone slag in the gap between the front shell and the rear shell. When the relay room is not activated, the scraper brush can effectively block the stone slag in the medium. After the relay room is activated, the scraper brush can also scrape the slag accumulated in the cavities of the front shell and the rear shell during the relative movement of the front shell and the rear shell, thereby reducing the problem that the relay room is difficult to shrink in hard rock and composite formations. In addition, the above scheme is not only applicable to the relay room of key components in the construction process of circular hard rock pipe jacking machines, but also to non-circular equipment, such as rectangular pipe jacking relay rooms, quasi-rectangular pipe jacking relay rooms, horseshoe-shaped pipe jacking relay rooms, and hinged seals of tunnel machinery and equipment.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A relay room, characterized in that: The invention comprises a front shell (1) and a rear shell (7) connected by a socket connection, wherein an oil cylinder (4) corresponding to the front shell (1) is arranged in the rear shell (7), a sealing member (3) is arranged between the socket parts of the front shell (1) and the rear shell (7), a steel plate brush assembly (2) is arranged on the outer wall of the front shell (1), and a scraper brush assembly (6) corresponding to the rear shell (7) is arranged at the rear of the front shell (1).

2. The relay room according to claim 1, characterized in that: The rear part (1-1) of the front housing (1) and the front part (7-1) of the rear housing (7) are socket-fitted; the sealing member (3) is located between the rear part (1-1) of the front housing (1) and the front part (7-1) of the rear housing (7).

3. The relay room according to claim 2, characterized in that: At least one annular groove is provided on the outer wall of the front portion (7-1) of the rear housing (7), and the sealing member (3) is located in the groove.

4. The relay room according to claim 2 or 3, characterized in that: The front portion (7-1) of the rear housing (7) is provided with a flushing port, and a plug (701) is detachably provided on the flushing port.

5. The relay room according to any one of claims 1 to 3, characterized in that: The steel plate brush assembly (2) comprises a base plate (201) fixed on the front outer wall of the front housing (1); a steel plate brush (204) is connected to the base plate (201) via a shaft (202); and the steel plate brush (204) is pressed and fixed via a cover plate (203).

6. The relay room according to claim 5, characterized in that: The shaft (202) is a pin which passes through a positioning hole on the steel plate brush (204) and is respectively welded and fixed to the bottom plate (201) and the cover plate (203); the bottom plate (201) is located in a positioning groove (205) provided on the outer wall of the front shell (1) and is welded and fixed to the outer wall of the front shell (1).

7. The relay room according to claim 6, characterized in that: The steel plate brush (204) is composed of a plurality of layers of upwardly curved steel plates, and each layer of steel plates is installed with staggered seams.

8. The relay room according to any one of claims 1 to 3, 6 and 7, characterized in that: The scraper brush assembly (6) comprises a round steel (601) fixed to the inner wall of the rear portion of the front housing (1), a scraper (602) being fixed to the round steel (601), one end of the scraper (602) being fixedly connected to the round steel (601) and the other end being in contact with the outer wall of the rear housing (7).

9. The relay room according to claim 8, characterized in that: The round steel (601) includes a plurality of segmented round steels, and the scraper (602) includes a plurality of segmented scraper plates. The length of the segmented round steel is smaller than the width of the segmented scraper plates, and two adjacent segmented scraper plates are installed in an overlapping manner.

10. The relay room according to claim 1 or 9, characterized in that: The oil cylinder (4) is fixed by a clamp (5) fixed on the inner wall of the rear housing (7), and the oil cylinder (4) is connected to a hydraulic power source (8) via a pipeline.

Images