Negative ring support for pushing of tube push bench out of hole

Abstract

The utility model discloses a negative ring support for pushing a pipe push bench out of a hole, and solves the problems that in the prior art, a rectangular pipe push bench uses a pipe joint for pushing out the hole, the cost is high, and the efficiency is low. The utility model relates to a negative ring support for pushing out of a hole of a pipe jacking machine, which comprises a span-adjustable support frame, a plurality of steel rings are detachably arranged on the support frame, and the contour surface on which the plurality of steel rings are positioned is matched with a corresponding concrete pipe joint; the supporting frame comprises at least two profile steel supports, every two adjacent profile steel supports are connected through an amplitude adjusting mechanism, the distance between the two profile steel supports is adjusted through the amplitude adjusting mechanisms, and then the span of the supporting frame is adjusted. According to the negative ring support, the supporting frame with the adjustable axial span is used for being matched with steel rings of different specifications, rapid switching of different pushing distances is achieved, the requirement for the pipe jacking machine to go out of a hole is met, and pushing adaptability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of the launching of a pipe jacking machine, in particular to a negative ring bracket for pipe jacking during the launching of a pipe jacking machine. Background Art

[0002] With the rapid development of urban construction, the rectangular pipe jacking machine, as a new underground pipeline construction method, has an important position and wide application in the fields of urban underground space development, municipal technical facility construction, etc. in recent years. The rectangular pipe jacking technology, also known as the rectangular shield technology, is a jacking pipeline construction method using a rectangular cross-section. It excavates a rectangular working shaft underground, and then uses jacking equipment to jack precast rectangular segments into the soil one by one to form a continuous underground rectangular pipeline.

[0003] During the construction process of a rectangular pipe jacking machine, the launching of the pipe jacking machine is one of the last key processes of pipe jacking construction. When jacking the last pipe segment, the traditional method is to use the pipe segment (or segment) as a carrier for jacking to complete the launching, and then remove the redundant pipe segments in the launching shaft. This will cause waste of the manufacturing cost of redundant pipe segments. Especially for large-section pipe segments, the manufacturing cost of a single pipe segment is often high. When the preset number of pipe segments just meets the number of pipe segments required in the tunnel, it is necessary to manufacture a special jacking tooling for recycling to reduce the manufacturing cost of the pipe segments. However, the existing jacking tooling, such as the device cited in a steel structure negative ring for super-large-section rectangular pipe jacking construction with the publication number of CN112983451 A, has a complex structure. When the jacking distance is different, the replacement method is complex, which affects the work efficiency. Therefore, it is very necessary to design a more reasonable and efficient negative ring tooling for jacking. Summary of the Utility Model

[0004] Aiming at the deficiencies in the above background art, the utility model provides a negative ring bracket for pipe jacking during the launching of a pipe jacking machine, which solves the problems of high cost and low efficiency of using pipe segments for launching during the launching of a rectangular pipe jacking machine in the prior art.

[0005] The technical solution of the utility model is realized as follows: A negative ring bracket for pipe jacking during the launching of a pipe jacking machine includes a support frame with adjustable span. A plurality of steel rings are detachably arranged on the support frame, and the contour surfaces where the plurality of steel rings are located match the corresponding concrete pipe segments; the support frame includes at least two profiled steel supports, and adjacent two profiled steel supports are connected by an amplitude modulation mechanism. The distance between the two profiled steel supports is adjusted through the amplitude modulation mechanism, so as to adjust the span of the support frame.

[0006] Further preferably, the amplitude modulation mechanism includes an X-shaped articulated frame, and the two fixed ends of the X-shaped articulated frame are respectively articulated on two corresponding profiled steel supports; the two moving ends of the X-shaped articulated frame are slidably arranged on two corresponding profiled steel supports and can be locked by a locking member. By moving the moving end of the X-shaped articulated frame relative to the fixed end, the distance between two adjacent support frames is changed, facilitating the adjustment of the span of the support frame.

[0007] As a first preferred solution: the locking member includes clamping blocks arranged at the two moving ends of the X-shaped articulated frame, and the clamping blocks are in clamping fit with clamping grooves arranged on the profiled steel supports.

[0008] As a second preferred solution: the locking member includes bolt members arranged at the two moving ends of the X-shaped articulated frame, and the bolt members pass through positioning holes arranged on the profiled steel supports and are fixed by nut members.

[0009] As a third preferred solution: the locking member includes an active telescopic member hinged between the moving end and the fixed end on the corresponding side, and the active telescopic member is a cylinder or a hydraulic cylinder or a turnbuckle.

[0010] Further preferably, the profiled steel support is a rectangular frame, and limiting groove cavities for limiting steel rings are arranged on the four sides of the rectangular frame, and the steel rings are sleeved in the limiting groove cavities. A protective pad is arranged in the limiting groove cavity.

[0011] As an implementation scheme, the steel ring is a whole-section steel pipe part; by replacing steel pipe parts with different lengths, the jacking out of the hole at different distances is realized.

[0012] As another implementation scheme, the steel ring is a telescopic sleeve part, and the telescopic sleeve part includes a large-diameter pipe and a small-diameter pipe, and the small-diameter pipe is slidably sleeved in the large-diameter pipe and the two are fixed by a shear-proof fixing member.

[0013] As a preferred solution, the shear-proof fixing member includes a flange ring arranged at the connection end of the large-diameter pipe, and high-strength bolts are arranged on the flange ring and are matched with threaded holes opened on the small-diameter pipe.

[0014] The beneficial effects of the present utility model are as follows: the negative ring support of the present utility model utilizes a support frame with an adjustable axial span to cooperate with steel rings of different specifications, realizes the rapid switching of different jacking distances, meets the requirements of the pipe jacking machine to exit the hole, and has good jacking adaptability. The integral support frame structure of the present utility model effectively solves the problems in the prior art that the use of concrete precast pipe sections as negative rings has high cost, long production cycle, great difficulty in post-treatment, and low turnover during the process of jacking the pipe jacking main machine out of the hole. In addition, the structure of the present utility model is simple, has strong versatility, avoids the high cost of manufacturing pipe sections as negative rings and the long construction period, greatly saves the construction period and cost, and at the same time, the negative ring support structure is detachable and can be transferred to other sites, recycled, and the adaptability and flexibility are greatly improved. Description of the Drawings

[0015] To more clearly illustrate the embodiments of the present utility model, the following will briefly introduce the attached drawings required for description in the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0016] Figure 1 It is the front view schematic diagram of the pushing rectangular concrete segment of the present utility model in Embodiment 1.

[0017] Figure 2 It is the side view schematic diagram of the 2m steel ring pushing concrete segment of the present utility model.

[0018] Figure 3 It is the side view schematic diagram of the 4m steel ring pushing concrete segment of the present utility model.

[0019] Figure 4 It is the structural schematic diagram of the steel ring in Embodiment 1.

[0020] Figure 5 It is the structural schematic diagram of the steel ring in Embodiment 2. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] As Figure 1 shown, in Embodiment 1, a negative ring bracket for the jacking out of a pipe jacking machine includes a support frame 1 with adjustable span. It should be noted that the span here refers to the axial distance along the tunnel, that is, the axial span. A plurality of steel rings 2 are detachably arranged on the support frame 1 to enable uniform jacking transmission of the concrete pipe sections. The contour surfaces where the plurality of steel rings 2 are located match the corresponding concrete pipe sections 4; it should be pointed out that when pushing a rectangular concrete pipe section, the contour of the steel ring is rectangular; when pushing a circular concrete pipe section, the contour of the steel ring is circular; that is, it can ensure that the steel ring can uniformly push the concrete pipe section. In this embodiment, a rectangular pipe jacking machine is taken as an example, and the pushing of a rectangular concrete pipe section is carried out. In this embodiment, the support frame 1 includes at least two section steel brackets 101 to stably support the steel ring and at the same time realize adjustable span. In this embodiment, two section steel brackets are taken as an example, and adjacent two section steel brackets 101 are connected by an amplitude modulation mechanism 3. The distance between the two section steel brackets 101 is adjusted through the amplitude modulation mechanism 3, and then the span of the support frame 1 is adjusted.

[0023] As Figure 4 shown, in this embodiment, the steel ring 2 is an integral steel pipe component. The steel pipe component can use 609 steel pipes. The steel support is constructed by splicing and welding H-shaped steel and channel steel. The H-shaped steel is the main beam load-bearing component, and the channel steel is used to support the 609 steel ring, which is arranged in two groups at both ends of the 609 steel pipe and fixed with diagonal tension channel steel; the 609 steel pipes are divided into one set of 1.5m, 2m, 3m, and 4m respectively. As Figure 2 , 3 shown, the quantity of each set is 17 to ensure uniform jacking of the rectangular concrete segment. Each set of steel pipes and the support frame 1 form an integral negative ring support. When in use, the integral negative ring support is hoisted into the launching shaft. The 609 steel ring support is used as the jacking load-bearing component. After the rectangular pipe jacking machine is jacked a certain distance, the 609 steel ring support is replaced, and the rectangular pipe jacking machine is jacked a certain distance again. The replacement and jacking are cycled until the requirement for the rectangular pipe jacking machine to exit the hole is met. When this negative ring support is in use, according to the different jacking distances before the rectangular pipe jacking machine exits the hole, steel pipes of different lengths are installed from short to long for jacking. Thus, while meeting the overall lifting load and the steel ring jacking load, the overall negative ring support minimizes the usage of steel profiles to reduce costs and meets the requirements for the rectangular pipe jacking machine to exit the hole.

[0024] In this embodiment, preferably, as Figure 2 shown, the amplitude modulation mechanism 3 includes an X-shaped articulated frame 301, which is formed by articulating two steel columns of equal length in the middle through a pin shaft. In this embodiment, the tops of the two steel columns are defined as the mobile ends, and the other ends are the fixed ends. The two fixed ends of the X-shaped articulated frame 301 are respectively articulated on the corresponding two steel supports 101 through pin shafts; the two mobile ends of the X-shaped articulated frame 301 are slidably arranged on the corresponding two steel supports 101 and can be locked by a locking member 302. During construction, when it is necessary to change the axial span of the support frame 1, the distance between the two steel supports is adjusted through the X-shaped articulated frame. When the distance is adjusted to the appropriate position, the X-shaped articulated frame is locked by the locking member to ensure the stability of the support frame at this span.

[0025] Embodiment 2, as Figure 5 shown, a negative ring support for pipe jacking machine to exit the hole. The difference between this embodiment and Embodiment 1 is that: in this embodiment, the steel ring 2 is a telescopic sleeve component. The telescopic sleeve component in this embodiment includes a large-diameter pipe and a small-diameter pipe. The large-diameter pipe and the small-diameter pipe can use 609 steel pipes with different diameters. One end of the large-diameter pipe is fixed on a steel support, and the other end is inserted and matched with the small-diameter pipe, while the small-diameter pipe is fixed on another steel support. The small-diameter pipe is slidably sleeved in the large-diameter pipe and the two are fixed through a shear-proof fixing member; when the large-diameter pipe and the small-diameter pipe are telescoped to the appropriate length, they are fixed through the shear-proof fixing member to ensure its strong axial bearing capacity.

[0026] In this embodiment, as a preferred solution, the anti-shearing fixing member includes a flange ring provided at the connection end of the large-diameter pipe. High-strength bolts are provided on the flange ring and are matched with threaded holes opened on the small-diameter pipe. Through the threaded connection between the high-strength bolts on the large-diameter pipe and the threaded holes on the small-diameter pipe, the locking of the large-diameter pipe and the small-diameter pipe is achieved, enabling it to have the ability to bear strong axial loads. It should be noted that at least 4 threaded holes are uniformly arranged along the circumferential direction of the small-diameter pipe as a group, and multiple groups of threaded holes matching the high-strength bolts can be provided on the small-diameter pipe, thereby achieving multi-distance length adjustment between the large-diameter pipe and the small-diameter pipe to adapt to different jacking distances. When the X-shaped articulated frame drives the two steel support frames to move in this embodiment, the large-diameter pipe and the small-diameter pipe move relative to each other, changing the length of the telescopic sleeve member. When moving to a suitable position, the high-strength bolts are matched with the threaded holes to form the locking of the large and small diameter pipes, ensuring that its telescopic sleeve member has strong axial bearing capacity.

[0027] In this embodiment, the steel support frame 101 is a rectangular frame. Limiting groove cavities 102 for limiting the steel ring 2 are provided on the four sides of the rectangular frame. The steel ring 2 is inserted into the limiting groove cavity 102, enabling quick replacement. In this embodiment, taking 17 steel rings as an example, four steel rings are respectively arranged at the top and bottom of the rectangular frame, and four steel rings are also respectively arranged on the left and right sides. One steel ring is respectively arranged at the corners of the bottom and the two sides to ensure uniform jacking with the rectangular concrete segment. A protective pad is provided in the limiting groove cavity 102 for protecting the steel ring member and preventing the pipe ring member from rotating at the same time.

[0028] Embodiment 3, a negative ring support for the jacking of a pipe jacking machine when exiting the hole. This embodiment is further optimized on the basis of Embodiment 1 or 2: In this embodiment, the locking member 302 includes blocks provided at the two moving ends of the X-shaped articulated frame 301. The blocks are engaged with the card slots provided on the steel support frame 101. The blocks move with the two moving ends of the X-shaped articulated frame 301. When the distance between the two steel support frames reaches a suitable position, the blocks are stuck in the corresponding card slots to achieve the locking of the X-shaped articulated frame and ensure its stability during the working process.

[0029] Embodiment 4, as Figure 2 shown, a negative ring support for the jacking of a pipe jacking machine when exiting the hole. The difference between this embodiment and Embodiment 3 is that in this embodiment, the locking member 302 includes bolt members provided at the two moving ends of the X-shaped articulated frame 301. The bolt members pass through the positioning holes provided on the steel support frame 101 and are fixed by nut members. A number of positioning holes are arranged in rows on the steel support frame 101. When the moving end moves to a suitable position, the bolt members are inserted into the positioning holes and fixed by bolts to lock the X-shaped articulated frame.

[0030] Embodiment 5. A negative ring bracket for the jacking of a pipe jacking machine when exiting the shaft. The difference between this embodiment and Embodiments 3 and 4 is that in this embodiment, the locking member 302 includes an active telescopic member hinged between the corresponding movable end and fixed end, and the active telescopic member is a cylinder or a hydraulic cylinder or a turnbuckle. That is, an active telescopic member is arranged between the two equal-length steel columns of the X-shaped hinge frame 301, and the opening and closing of the X-shaped hinge frame are changed by the telescoping of the active telescopic member, so as to achieve the purpose of adjusting the distance between the two profiled steel brackets. Moreover, the active telescopic member has a self-locking function and can lock the X-shaped hinge frame.

[0031] The utility model can be flexibly disassembled and assembled, which is convenient for being transferred to other sites for repeated use, meets the requirements of the pipe jacking machine when exiting the shaft, and can use steel rings of multiple specifications for switching jacking according to needs, with good adaptability. Compared with the prior art, the steel negative ring bracket structure of the present invention does not need to manufacture redundant pipe sections for jacking in and out of the shaft, reduces the cost of engineering construction, improves the construction efficiency and time, and can be reused at the same time.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A negative ring support for pushing out of a pipe jacking machine, characterized in that: The invention comprises a support frame (1) with adjustable span, wherein a plurality of steel rings (2) are detachably provided on the support frame (1), and the contour surfaces on which the plurality of steel rings (2) are located match the corresponding concrete pipe sections (4); the support frame (1) comprises at least two steel support frames (101), and two adjacent steel support frames (101) are connected via an amplitude modulation mechanism (3), and the distance between the two steel support frames (101) is adjusted via the amplitude modulation mechanism (3), thereby adjusting the span of the support frame (1).

2. The negative ring support for pushing out of a pipe jacking machine according to claim 1 is characterized in that: The amplitude modulation mechanism (3) comprises an X-shaped articulated frame (301), wherein two fixed ends of the X-shaped articulated frame (301) are respectively articulated on two corresponding steel brackets (101); and two movable ends of the X-shaped articulated frame (301) are slidably arranged on the two corresponding steel brackets (101) and can be locked by a locking member (302).

3. The negative ring support for pushing out of a pipe jacking machine according to claim 2 is characterized in that: The locking member (302) comprises a clamping block arranged at two movable ends of the X-shaped hinge frame (301), and the clamping block is engaged with a clamping groove arranged on the profile steel bracket (101).

4. The negative ring support for pushing out of a pipe jacking machine according to claim 2 is characterized in that: The locking member (302) comprises bolt members arranged at two movable ends of the X-shaped hinged frame (301), the bolt members passing through positioning holes arranged on the profiled steel support (101) and being fixed by nut members.

5. The negative ring support for pushing out of a pipe jacking machine according to claim 2 is characterized in that: The locking member (302) comprises an active telescopic member hinged between a corresponding side movable end and a fixed end, wherein the active telescopic member is a cylinder or a hydraulic cylinder or a turnbuckle bolt.

6. The negative ring support for pushing out of a pipe jacking machine according to any one of claims 1 to 5, characterized in that: The steel support (101) is a rectangular frame, and each of the four sides of the rectangular frame is provided with a limiting groove cavity (102) for limiting the steel ring (2), and the steel ring (2) is inserted into the limiting groove cavity (102).

7. The negative ring support for pushing out of a pipe jacking machine according to claim 6 is characterized in that: A protective pad is provided in the limiting groove cavity (102).

8. The negative ring support for pushing out of a pipe jacking machine according to claim 1 is characterized in that: The steel ring (2) is a whole-section steel pipe piece.

9. The negative ring support for pushing out of a pipe jacking machine according to claim 1 is characterized in that: The steel ring (2) is a telescopic sleeve member, which comprises a large-diameter tube and a small-diameter tube. The small-diameter tube is slidably sleeved inside the large-diameter tube and the two are fixed by an anti-shear fixing member.

10. The negative ring support for pushing out of a pipe jacking machine according to claim 9, characterized in that: The anti-shear fixing member comprises a flange ring arranged at the connecting end of the large-diameter pipe, on which high-strength bolts are arranged, and the high-strength bolts are matched with threaded holes opened on the small-diameter pipe.

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