Pipeline pretreatment mold loader

Abstract

The invention discloses a pipeline pretreatment die-loader, comprising: a fixed die with an opening at its rear end and a plurality of externally inclined wedges disposed therein; a movable die located at the rear of the fixed die, the movable die comprising a push plate and a plurality of internally inclined wedges, the plurality of internally inclined wedges being slidably connected along different radii of the push plate, the internally inclined wedges achieving radial movement by cooperating with the externally inclined wedges; a movable mechanism for adjusting the relative position between the movable die and the fixed die; a pipeline support member comprising an elastically expandable steel die, one end of the steel die being provided with an internal tooth segment, the other end of the steel die being provided with an external tooth segment capable of interlocking with the internal tooth segment, the pipeline support member being sleeved outside the internally inclined wedges, and the outer diameter of the push plate being no less than the inner diameter of the steel die. Since the pipeline support member only contacts any one pipeline support member during movement, and both contact surfaces are smooth, the friction between the two is much less than that of the prior art, thereby preventing multiple pipeline supports from becoming stuck in an underground passage.

Description

Technical Field

[0001] The invention relates to the field of trenchless pipeline construction, in particular to a pipeline pretreatment formwork device. Background Art

[0002] The pipe pulling construction method is a trenchless construction method. The pipe pulling construction method first requires using a pulling pipe drilling rig to open an underground passage for burying the pipe, and then gradually using drill bits of increasing size to expand the underground passage.

[0003] After the underground tunnel is opened, steel formwork is used to reinforce it to prevent collapse. Existing steel formwork is generally less than one meter long, and construction teams must insert it section by section into the tunnel to form a support formwork that covers the entire tunnel. However, due to the high coefficient of friction between the outer surface of the steel formwork and the soil, when a certain number of steel formworks are used, the combined friction between all the steel formworks and the soil creates significant damping, making it easy for the support formwork to become stuck in the tunnel, preventing smooth construction. Therefore, it is necessary to improve existing construction equipment to reduce the damping of the support formwork within the tunnel. Summary of the Invention

[0004] The present invention aims to provide a pipeline pretreatment mold loader to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0005] The pipeline pretreatment mold loader according to the first embodiment of the present invention includes:

[0006] A fixed die, the rear end of which is provided with an opening, the front end of which is used to connect with the distributor of the drill bit, the fixed die having a die cavity therein, and a plurality of externally inclined wedge blocks disposed in the die cavity, the sizes of the externally inclined wedge blocks decreasing from front to back;

[0007] A movable mold is located at the rear side of the fixed mold, and includes a push plate and a plurality of inner-slanted wedge blocks. The plurality of inner-slanted wedge blocks are respectively slidably connected along different radii of the push plate, and the inner-slanted wedge blocks achieve radial movement of the inner-slanted wedge blocks by cooperating with the outer-slanted wedge blocks.

[0008] A movable mechanism, which is used to adjust the relative position between the movable mold and the fixed mold;

[0009] The pipe support comprises an elastic shrinkage band and a plurality of steel mold halves. All the steel mold halves are combined together to form a circular tubular steel mold. The outer peripheral surface of the steel mold is provided with a groove arranged along the circumferential direction. The elastic shrinkage band is arranged in the groove. One end of the steel mold is provided with an inner tooth segment. The other end of the steel mold is provided with an outer tooth segment that can be mutually engaged with the inner tooth segment. The pipe support is sleeved outside the inner inclined wedge block, and the outer diameter of the push plate is not less than the inner diameter of the steel mold.

[0010] The pipeline pretreatment mold loader according to the embodiment of the present invention has at least the following beneficial effects: since the pipeline support is assembled by the elastic shrinkage band and a plurality of the steel mold petals, the pipeline support can be stretched and expanded from the inside to the outside or shrunk and restored from the outside to the inside. When it is necessary to reinforce the underground passage, the construction personnel first place the fixed mold connected to the drill bit into the underground passage, with the opening of the fixed mold facing the entrance of the underground passage. Then, a pipeline support is fixed at the entrance of the underground passage, and then a second pipeline support is sleeved on the movable mold. The construction personnel use the movable mechanism to move the movable mold and the second pipeline support toward the fixed mold. During this process, the second pipeline support is stretched and passes through the first pipeline support and then moves toward the fixed mold. When the inner inclined wedge gradually moves to the outer inclined wedge, the size of the movable mold gradually increases to stretch the second pipeline support, so that the two pipeline supports can be mutually engaged with the inner tooth segment through the outer tooth segment. After that, the construction personnel The workers use the movable mechanism to move the movable mold out of the underground passage. When the movable mold is moved outside the underground passage, the construction workers continue to put the third pipe support on the movable mold and drive the third pipe support to pass through the first pipe support and the second pipe support in sequence. When the third pipe support is located in the second pipe support, the construction workers start the traction pipe drill to drive the drill bit to move forward a distance in the underground passage, causing the fixed mold to leave the second pipe support. Finally, the construction workers perform the relevant operations again, so that the third pipe support and the second pipe support are engaged with each other, and so on, until the underground passage is covered by multiple pipe supports; compared with the existing technology, since the pipe support only contacts with any one of the pipe supports during the movement, and the contact surfaces of the two are smooth surfaces, the friction between the two is much smaller than the total friction between the multiple pipe supports and the soil layer, so as to prevent the multiple pipe supports from being stuck in the underground passage, thereby greatly reducing the construction difficulty of the support formwork.

[0011] According to some embodiments of the present invention, the movable mechanism includes a fixed pulley, a first traction rope, and a second traction rope. The fixed pulley is installed inside the mold cavity. One end of the first traction rope is fixedly connected to the front of the movable mold. The first traction rope passes around the fixed pulley and passes from front to back to the push plate. One end of the second traction rope is fixedly connected to the rear end of the push plate. When a construction worker pulls the first traction rope, the movable mold moves toward the fixed mold, and when the construction worker pulls the second traction rope, the movable mold moves in the opposite direction of the fixed mold.

[0012] According to some embodiments of the present invention, multiple externally inclined wedges are arranged around the central circumference of the fixed mold, with each adjacent pair of externally inclined wedges spaced apart such that a positioning groove is formed between all of the externally inclined wedges. The fixed pulley is located at the center of the fixed mold. The arrangement of the fixed pulley ensures that when the first traction rope is pulled, the internally inclined wedges of the movable mold align with the externally inclined wedges of the fixed mold, thereby improving the fit between the two.

[0013] According to some embodiments of the present invention, a positioning block, insertable into the positioning slot, is fixedly connected to the push plate between all the inner-slanted wedge blocks. One end of the first traction rope is fixedly connected to the front end of the positioning block. A wire hole is provided in the center of the positioning block, extending through the push plate, for the passage of the first traction rope. The positioning block is used to position the inner-slanted wedge blocks relative to the outer-slanted wedge blocks, further improving their compatibility.

[0014] According to some embodiments of the present invention, since the pipe support member that enters the underground passage later needs to pass through the previous pipe support member, in order to achieve the mutual engagement between the latter pipe support member and the former pipe support member, the outer tooth section of the steel mold faces the push plate.

[0015] According to some embodiments of the present invention, in order to facilitate the pipe support members that enter the underground passage later to open the previous pipe support members, the steel mold is provided with an external chamfer at the end having the inner tooth segment.

[0016] According to some embodiments of the present invention, since the fixed mold leaves the fixed mold under the drive of the traction pipe drill, in order to prevent sludge from entering the pipe support at this time, the rear end of the fixed mold is connected to a sealing sleeve, and the sealing sleeve can maintain the seal between the two when the fixed mold and the pipe support are separated.

[0017] According to some embodiments of the present invention, since the inner side surface of the steel mold is a circular surface, in order to facilitate the expansion of the steel mold flaps, the outer peripheral surface of the inner inclined wedge block is an arc surface.

[0018] According to some embodiments of the present invention, in order to facilitate the accurate combination of multiple steel mold halves into the steel mold, the steel mold is provided with multiple positioning structures, and each two adjacent steel mold halves are positioned by the positioning structures.

[0019] According to some embodiments of the present invention, in order to reduce the friction coefficient between the two pipe supports, the thickness of the elastic shrinkage band is not greater than the depth of the groove, that is, the elastic shrinkage band does not protrude from the outer peripheral surface of the steel mold.

[0020] Additional aspects and advantages of the present invention will be given in part in the description below and in part will become obvious from the description below or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a pipeline pretreatment die-loader according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A top view of the pipeline pretreatment die loader shown;

[0024] Figure 3 yes Figure 2 A cross-sectional view of the pipeline pretreatment die-setter along the AA section line is shown;

[0025] Figure 4 yes Figure 1 An exploded view of the pipe pretreatment die-setter shown;

[0026] Figure 5 This is a schematic diagram of the pipeline pretreatment formwork device according to an embodiment of the present invention when laying the support formwork.

[0027] In the accompanying drawings: 100-fixed mold, 200-movable mold, 110-facade, 120-opening, 300-drill bit, 310-divider, 320-connector, 130-mold cavity, 140-externally inclined wedge, 210-push plate, 220-internally inclined wedge, 230-positioning block, 400-movable mechanism, 410-first traction rope, 420-second traction rope, 430-fixed pulley, 231-wire hole, 510-steel mold, 511-steel mold petal, 520-elastic shrinkage band, 500-pipe support, 512-inner tooth segment, 513-outer tooth segment, 150-sealing sleeve, 514-positioning structure. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do 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, they cannot be understood as limitations on the present invention.

[0030] In the description of this invention, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] like Figure 1 and Figure 2 As shown, the pipeline pretreatment die-loading device according to the first embodiment of the present invention includes a fixed die 100 and a movable die 200. The fixed die 100 is a cylindrical structure with a vertical surface 110 and an opening 120 at its front and rear ends, respectively. The vertical surface 110 is connected to the distributor 310 of the drill bit 300. The distributor 310 is a structure provided by the drill bit 300 and belongs to the prior art. It can remain relatively stationary when the drill bit 300 rotates, so that the fixed die 100 does not rotate with the rotation of the drill bit 300. The front end of the drill bit 300 is also provided with a connector 320 for mounting with the drill rod of a traction tube drill (not shown in the drawings), so that the traction tube drill can provide power for the rotation and forward movement of the drill bit 300.

[0033] like Figure 3As shown, the fixed mold 100 is a hollow structure, in which a mold cavity 130 is provided. The mold cavity 130 is installed with four outwardly inclined wedge blocks 140 near the vertical surface 110. Each of the outwardly inclined wedge blocks 140 can be selected as a triangular pyramid, and its cross-sectional area decreases from front to back. The four outwardly inclined wedge blocks 140 are arranged around the central circumference of the fixed mold 100, and the outer inclined surfaces of the four outwardly inclined wedge blocks 140 are all uniformly outward.

[0034] like Figure 3 and Figure 4 As shown, the movable mold 200 is located at the rear side of the fixed mold 100. The movable mold 200 includes a push plate 210 and four inner-slanted wedges 220. The four inner-slanted wedges 220 are slidably connected along different radii of the push plate 210 to achieve expansion or contraction of the movable mold 200. Each of the inner-slanted wedges 220 can be a fan-shaped cylinder with an inner bevel. The inner bevels of the four inner-slanted wedges 220 are all inwardly facing. The positions of all the inner-slanted wedges 220 correspond to the positions of all the outer-slanted wedges 140. When the inner-slanted wedges 220 gradually move forward along the outer-slanted wedges 140, the inner-slanted wedges 220 gradually move along the outer diameter of the push plate 210 under the combined action of the inner and outer bevels to achieve expansion of the movable mold 200, and vice versa, to achieve contraction of the movable mold 200. It is understandable that the present invention does not limit the specific structure of the outer inclined wedge block 140 and the inner inclined wedge block 220. As long as the inner inclined wedge block 220 can be radially moved by the push plate 210 of the outer inclined wedge block 140, no matter what structure the two are, they are within the protection scope of the present invention.

[0035] Furthermore, to improve the fit between the inner-slanted wedge blocks 220 and the outer-slanted wedge blocks 140, each adjacent pair of outer-slanted wedge blocks 140 are spaced apart so that a cross-shaped positioning groove (not shown) is formed between all of the outer-slanted wedge blocks 140. Furthermore, the push plate 210 is fixedly connected with a cross-shaped positioning block 230 between the four inner-slanted wedge blocks 220. The positioning block 230 is shorter than the inner-slanted wedge blocks 220 and can be inserted into the positioning groove to achieve positioning between the inner-slanted wedge blocks 220 and the outer-slanted wedge blocks 140.

[0036] In addition, in order to adjust the relative position between the movable mold 200 and the fixed mold 100, a movable mechanism 400 is connected between the movable mold 200 and the fixed mold 100. The movable mechanism 400 includes a first traction rope 410, a second traction rope 420, and a fixed pulley 430. The fixed pulley 430 is installed in the center of the positioning groove. The first traction rope 410 and the second traction rope 420 can both be steel wire ropes. One end of the first traction rope 410 is fixedly connected to the front end of the positioning block 230. The center of the positioning block 230 is provided with a wire hole 231. The wire hole 231 extends to the push plate 210. The first traction rope 410 bypasses the fixed pulley 430 and passes through the wire hole 231 from the front to the back to the outside of the push plate 210. One end of the second traction rope 420 is fixedly connected to the rear end of the push plate 210. When the construction worker pulls the first traction rope 410, the movable mold 200 moves toward the fixed mold 100, and when the construction worker pulls the second traction rope 420, the movable mold 200 moves in the opposite direction of the fixed mold 100. It is understood that the present invention does not limit the specific structure of the movable mechanism 400. As long as the movable mechanism 400 can adjust the relative position between the movable mold 200 and the fixed mold 100, whether the movable mechanism 400 is an electric push rod or other structure, it falls within the scope of protection of the present invention.

[0037] In order to solve the existing technical problems, the existing steel mold 510 must also be modified. In the present invention, the steel mold 510 is in the shape of a circular tube, which is assembled from four steel mold petals 511. The cross-sectional shape of each steel mold petal 511 is arc-shaped. The outer peripheral surface of each steel mold petal 511 is provided with mutually interconnected recesses, and the four recesses are combined to form a groove arranged along the circumference of the steel mold 510. In order to maintain the original structure of the steel mold 510 in the absence of external force, the steel mold 510 is connected to an elastic shrinkage band 520 in the groove. The elastic shrinkage band 520 can be a rubber band. At this time, the elastic shrinkage band 520 can provide elastic force for the assembly of the four steel mold petals 511, so that the steel mold 510 can be stretched from the inside to the outside or shrunk and restored from the outside to the inside. For ease of description, the steel mold 510 and the elastic shrink band 520 together constitute a pipe support 500, and a plurality of the pipe supports 500 connected in sequence can together constitute a supporting template for supporting an underground passage.

[0038] like Figure 3As shown, each of the steel mold halves 511 is provided with inner teeth at one end, and outer teeth at the other end. The inner teeth and outer teeth are located on the inner and outer walls of the steel mold halves 511, respectively. The four inner teeth are arranged opposite each other and can be combined to form the inner tooth segment 512 of the steel mold 510. The four outer teeth are arranged opposite each other and can be combined to form the outer tooth segment 513 of the steel mold 510. The inner tooth segment 512 of the steel mold 510 can be mutually engaged with the outer tooth segment 513 of another steel mold 510. The movable mold 200 is used to fit the pipe support 500. All the inner inclined wedges 220 are respectively provided in a one-to-one correspondence with all the steel mold halves 511. Since the push plate 210 is mainly used to push the pipe support 500 forward, the outer diameter of the push plate 210 is not less than the inner diameter of the steel mold 510, but preferably not greater than the outer diameter of the steel mold 510.

[0039] It should be noted that the inner teeth and the outer teeth are not spiral teeth, but intermittent teeth, and the present invention does not limit the number of the steel mold halves 511. The number of the steel mold halves 511 can be two, three, etc., and correspondingly, the number of the outer inclined wedge blocks 140 and the number of the inner inclined wedge blocks 220 are consistent with the number of the steel mold halves 511.

[0040] like Figure 5 As shown, using the above structure, the construction steps for laying the support formwork in the underground passage are as follows:

[0041] 1. Construction workers first place the fixed mold 100 connected to the drill bit 300 into the underground passage, with the opening 120 of the fixed mold 100 facing the entrance of the underground passage. Then, a pipe support 500 is fixed at the entrance of the underground passage. At this time, the vertical surface 110 of the fixed mold 100 and the pipe support 500 are separated by a distance greater than the length of the pipe support 500.

[0042] 2. The second pipe support 500 is placed on the movable mold 200. The construction worker pulls the first traction rope 410 to move the movable mold 200 toward the fixed mold 100. Since the outer diameter of the push plate 210 is not less than the inner diameter of the steel mold 510, the movable mold 200 can drive the second pipe support 500 to move toward the fixed mold 100. During this process, the second pipe support 500 is expanded and passes through the first pipe support 500 before moving toward the fixed mold 100.

[0043] 3. When the inner inclined wedge block 220 gradually moves toward the outer inclined wedge block 140, the inner inclined wedge block 220 gradually moves along the outer diameter of the push plate 210 under the action of the outer inclined wedge block 140, that is, the size of the movable mold 200 gradually increases, thereby expanding the second pipe support 500, so that the two pipe supports 500 can be mutually engaged with the inner tooth segment 512 through the outer tooth segment 513;

[0044] 4. Afterwards, the construction worker pulls the second traction rope 420 to move the movable mold 200 out of the underground passage. Since the second pipe support 500 and the first pipe support 500 are engaged with each other, the second pipe support 500 will not move backward with the backward movement of the movable mold 200. When the movable mold 200 is moved outside the underground passage, the construction worker continues to put the third pipe support 500 on the movable mold 200 and again pulls the first traction rope 410 to move the movable mold 200 and the third pipe support 500 toward the fixed mold 100. During this process, the third pipe support 500 is sequentially expanded and passes through the first pipe support 500 and the second pipe support 500.

[0045] 5. When the third pipe support 500 is located inside the second pipe support 500, the construction personnel start the traction pipe drill to drive the drill bit 300 forward a distance in the underground passage, causing the fixed mold 100 to leave the second pipe support 500. Finally, step 3 is repeated, so that the third pipe support 500 is engaged with the second pipe support 500.

[0046] 6. Repeat steps 4 and 5 until the underground passage is covered by multiple pipe support members 500.

[0047] It should be further explained that, because the pipe support member 500 entering the underground passage later must pass through the previous pipe support member 500, to achieve mutual engagement between the subsequent pipe support member 500 and the previous pipe support member 500, when the pipe support member 500 is mounted on the movable mold 200, the outer tooth segment 513 of the steel mold 510 faces the push plate 210. At the same time, to facilitate the subsequent pipe support member 500 entering the underground passage to open the previous pipe support member 500, the steel mold 510 has an outer chamfer on the end having the inner tooth segment 512.

[0048] like Figure 1As shown, in some embodiments of the present invention, since the fixed mold 100 leaves the fixed mold 100 under the drive of the traction pipe drill, in order to prevent sludge from entering the pipe support 500 at this time, the rear end of the fixed mold 100 is connected to a sealing sleeve 150. The sealing sleeve 150 can be optionally a rubber sleeve, and its rear end extends outside the fixed mold 100, so that the sealing sleeve 150 can still maintain the seal between the two when the fixed mold 100 and the pipe support 500 are separated.

[0049] like Figure 3 As shown, in some embodiments of the present invention, in order to further reduce the friction coefficient between the two pipe supports 500, the thickness of the elastic shrinkage band 520 is not greater than the depth of the groove, that is, the elastic shrinkage band 520 does not protrude from the outer peripheral surface of the steel mold 510. At this time, the elastic shrinkage band 520 of the pipe support 500 does not contact the inner wall of the other pipe support 500.

[0050] In some embodiments of the present invention, to facilitate accurate assembly of the plurality of steel mold halves 511 into the steel mold 510, the steel mold 510 is provided with four positioning structures 514. Each adjacent two steel mold halves 511 are positioned using a corresponding positioning structure 514. In this embodiment, the positioning structures 514 may be V-shaped.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. Pipeline pretreatment mold loader, characterized in that: include: A fixed mold (100) is provided with an opening (120) at its rear end, and a front end of the fixed mold (100) is used to connect with a distributor (310) of a drill bit (300). A mold cavity (130) is provided in the fixed mold (100), and a plurality of externally inclined wedge blocks (140) are provided in the mold cavity (130), and the size of the externally inclined wedge blocks (140) decreases from front to back. A movable mold (200) is located at the rear side of the fixed mold (100), and the movable mold (200) includes a push plate (210) and a plurality of inner inclined wedge blocks (220). The plurality of inner inclined wedge blocks (220) are respectively slidably connected along different radii of the push plate (210). The inner inclined wedge blocks (220) achieve radial movement of the inner inclined wedge blocks (220) by cooperating with the outer inclined wedge blocks (140); A movable mechanism (400) includes a fixed pulley (430), a first traction rope (410), and a second traction rope (420), wherein the fixed pulley (430) is installed inside the mold cavity (130), one end of the first traction rope (410) is fixedly connected to the front of the movable mold (200), the first traction rope (410) passes around the fixed pulley (430) and passes through the push plate (210) from front to back, and one end of the second traction rope (420) is fixedly connected to the rear end of the push plate (210), and the movable mechanism (400) is used to adjust the relative position between the movable mold (200) and the fixed mold (100); A pipe support (500) includes an elastic shrinkage band (520) and a plurality of steel mold halves (511), all of which are combined to form a tubular steel mold (510), the outer peripheral surface of the steel mold (510) being provided with a groove arranged along the circumferential direction, the elastic shrinkage band (520) being arranged in the groove, one end of the steel mold (510) being provided with an inner tooth section (512), and the other end of the steel mold (510) being provided with an outer tooth section (513) which can be mutually engaged with the inner tooth section (512), the pipe support (500) being sleeved outside the inner inclined wedge block (220), the outer diameter of the push plate (210) being not less than the inner diameter of the steel mold (510), and the outer tooth section (513) of the steel mold (510) facing the push plate (210).

2. The pipeline pretreatment mold according to claim 1, characterized in that: A plurality of the outer inclined wedge blocks (140) are arranged around the central circumference of the fixed mold (100), and each two adjacent outer inclined wedge blocks (140) are spaced apart so that a positioning groove is formed between all the outer inclined wedge blocks (140), and the fixed pulley (430) is located at the center of the fixed mold (100).

3. The pipeline pretreatment mold according to claim 2, characterized in that: The push plate (210) is fixedly connected with a positioning block (230) between all the inner inclined wedge blocks (220) and can be inserted into the positioning groove. One end of the first traction rope (410) is fixedly connected to the front end of the positioning block (230). The center of the positioning block (230) is provided with a wire hole (231) that passes through the push plate (210). The wire hole (231) is used for allowing the first traction rope (410) to pass through.

4. The pipeline pretreatment mold according to claim 1, characterized in that: The steel die (510) is provided with an outer chamfer at one end having the inner tooth segment (512).

5. The pipeline pretreatment mold according to claim 1, characterized in that: The rear end of the fixed mold (100) is connected to a sealing sleeve (150).

6. The pipeline pretreatment mold according to claim 1, characterized in that: The outer peripheral surface of the inner inclined wedge block (220) is an arc surface.

7. The pipeline pretreatment mold according to claim 1, characterized in that: The steel mold (510) is provided with a plurality of positioning structures (514), and each two adjacent steel mold halves (511) are positioned by the positioning structures (514).

8. The pipeline pretreatment mold according to claim 1, characterized in that: The thickness of the elastic shrink band (520) is not greater than the depth of the groove.

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