CN218195869U - Preformed hole template of large-diameter pipeline of PC well chamber - Google Patents

Abstract

The utility model belongs to the technical field of municipal road engineering, and relates to a preformed hole template of a large-diameter pipeline of a PC well chamber, which comprises a support ring frame and a limiting rod and/or a telescopic rod clamped on the outer wall of the support ring frame; the limiting rod axial direction, the telescopic rod axial direction and the supporting ring frame axial direction are consistent, the limiting rods and the telescopic rods are multiple, a circle is sequentially arranged on the multiple limiting rods or the multiple telescopic rods along the outer ring wall of the supporting ring frame, and a circle is arranged on the outer ring wall of the supporting ring frame at intervals by the multiple limiting rods and the multiple telescopic rods according to the shape of the supporting ring frame. The utility model provides a preformed hole template of big pipe diameter pipeline of PC well room improves the effective rate of utilization of material, uses in a flexible way reduce cost.

Description

Preformed hole template of large-diameter pipeline of PC well chamber

Technical Field

The utility model belongs to the technical field of the town road engineering, a preformed hole template of big pipe diameter pipeline of PC well room is related to.

Background

The municipal road engineering is an engineering integrating traffic, drainage, heating ventilation, heating power, communication, fuel gas and power supply, obtains large-step construction as important infrastructures in cities and towns, and is provided with a large number of inspection wells in road pipe network construction for convenience in installation and maintenance.

At present, the PC well has higher construction quality, convenient installation, low carbon and environmental protection, and can better ensure the construction safety and the engineering progress, so that the PC well is concerned by more and more enterprises and continuously promotes the application of the PC well in the actual engineering. The production of the PC well mostly adopts a prefabricated mould, particularly the manufacture of the preformed hole of the large-diameter pipeline of the PC well, and the template is specially manufactured according to the shape, the size, the wall thickness and the diameter of the well body because the preformed hole belongs to the intersecting node of the well body and the pipeline, but the preformed hole template can not be turned over in the production process of different PC wells due to the influence of the variables, and the material is wasted because a set of corresponding preformed hole template is designed for different PC wells, so that the effective utilization rate of the material of the preformed hole template is lower; meanwhile, the traditional template of the large-pipe-diameter pipeline preformed hole is large in area and special in structure, and the production cost of the PC well chamber is invisibly increased.

SUMMERY OF THE UTILITY MODEL

To the technical problem that the utilization ratio is low and with high costs that current PC well preformed hole template exists, the utility model provides a preformed hole template of the big pipe diameter pipeline of PC well room improves the effective rate of utilization of material, uses in a flexible way, reduce cost.

In order to achieve the purpose, the invention adopts the technical scheme that:

a reserved hole template of a large-diameter pipeline of a PC well chamber comprises a supporting ring frame and a limiting rod and/or an expansion rod clamped on the outer wall of the supporting ring frame; the axial direction of the limiting rod, the axial direction of the telescopic rod and the axial direction of the support ring frame are consistent, the limiting rods and the telescopic rods are multiple, and a plurality of limiting rods or a plurality of telescopic rods are sequentially arranged for one circle along the outer ring wall of the support ring frame; the limiting rods and the telescopic rods are arranged at intervals for one circle on the outer ring wall of the supporting ring frame according to the shape of the supporting ring frame.

Furthermore, the limiting rod comprises a rectangular pipe and outer diameter pipe end heads respectively arranged at two ends of the rectangular pipe; the end heads of the outer diameter pipes are respectively clamped with the rectangular pipes and the supporting ring frame.

Furthermore, the telescopic rod comprises an outer diameter pipe, an inner diameter pipe, an extension sleeve, an extension rod, an end head of the outer diameter pipe and an end head of the inner diameter pipe; one end of the inner diameter pipe extends into the outer diameter pipe, and the other end of the inner diameter pipe extends into the extension sleeve and is connected with an extension rod extending into the extension sleeve; the outer diameter pipe, the inner diameter pipe, the extension sleeve and the extension rod are coaxially arranged; the end head of the outer diameter pipe is arranged at one end of the outer diameter pipe, which is far away from the inner diameter pipe, and the end head of the outer diameter pipe is respectively clamped with the outer diameter pipe and the support ring frame; the inner diameter pipe end is arranged at one end, far away from the inner diameter pipe, of the extension rod, and the inner diameter pipe end is clamped with the extension rod and the support ring frame respectively.

Furthermore, the end head of the outer diameter pipe comprises an outer diameter clamping block and a ring clamping block A which are movably connected from top to bottom in sequence; the rectangular pipe or the outer diameter pipe is clamped into the outer diameter clamping block; the ring fixture block A is clamped on the support ring frame.

Furthermore, the end of the inner diameter pipe comprises an inner diameter clamping block and a ring clamping block B which are movably connected from top to bottom in sequence; the extension rod is clamped in the inner diameter clamping block; and the ring fixture block B is clamped on the support ring frame.

Further, the ring clamping block A and the ring clamping block B are identical in structure.

Further, the support ring frame comprises an inner ring and an outer ring which are arranged in parallel and coaxially; a connecting line between the axle center of the inner ring and the axle center of the outer ring is parallel to the axial direction of the limiting rod; the ring clamping block B and the ring clamping block A are correspondingly clamped on the inner ring or the outer ring respectively.

Furthermore, the preformed hole template of the large-diameter pipeline of the PC well chamber also comprises a compensation block adhered to the telescopic rod; the compensation blocks are respectively stuck on the upper end surface of the outer diameter fixture block and the upper end surface of the inner diameter fixture block.

Further, the preformed hole template of the PC well chamber large-diameter pipeline also comprises a surface layer; the surface layer is wrapped outside a ring formed by the limiting rods and/or the telescopic rods in a wrapping mode.

Furthermore, the surface layer is an annular structure which is formed by winding rubber sheets and has the same structure with the outer surface of the support ring frame.

The utility model has the advantages that:

1. the utility model discloses in, adopt support ring frame and the gag lever post and/or the telescopic link of card on support ring frame outer wall to form the preformed hole template, gag lever post axial length is unadjustable, telescopic link axial length is adjustable, thereby according to the actual shape of PC well preformed hole, select gag lever post and/or telescopic link and the body size regulation form flexible template, the realization is along with PC well shape, size, the wall thickness, the change of pipeline diameter and change adaptively, improve the effective rate of utilization of template material, and the production cost is reduced.

2. The utility model discloses a template when the installation, when there is very big deformation point in the PC well shape, adopts the telescopic link as the template, and the deformation is mild in the PC well appearance, adopts the gag lever post to form the template, and is selected according to the PC well appearance, uses in a flexible way.

3. The utility model discloses in, realize the joint of gag lever post and/or telescopic link and support ring frame, convenient operation, simple structure through ring fixture block A and ring fixture block B.

4. The utility model provides a template structure, convenient assembly, and ability reuse, trample low carbon, environmental protection, efficient theory completely, promote the development of assembled technique in town road engineering.

Drawings

Fig. 1 is a schematic view of the overall structure of a PC well (square well) large-diameter pipeline preformed hole template in embodiment 1 of the present invention;

fig. 2 is a schematic view of the whole structure of a PC well (circular well) large-diameter pipeline preformed hole template of embodiment 2 of the present invention;

FIG. 3 is a schematic view of the installation of a limiting rod;

FIG. 4 is a schematic view of the installation of the telescoping rod;

FIG. 5 is a schematic view of a stop lever;

FIG. 6 is a schematic view of a telescopic rod structure;

FIG. 7 is a schematic view of an outer diameter tube end configuration;

FIG. 8 is a schematic view of an inner diameter tube end head configuration;

FIG. 9 is an expanded view of the template surface of the preformed hole of the circular PC well;

FIG. 10 is an expanded view of the square PC well preformed hole template facing;

wherein:

1-an inner ring; 2-the outer ring; 3-a rectangular tube; 4-an outer diameter pipe; 5-an inner diameter pipe; 6-an extension sleeve; 7-an extension rod; 8-outer diameter pipe end; 81-outer diameter fixture block; 82-ring clamp block a; 9-inner diameter tube end; 91-inner diameter fixture block; 92-ring clamp B; 10-rubber sheet; 11-a support ring frame; 12-a limiting rod; 13-a telescopic rod; 14-a compensation block; 15-surface layer; 16-gap.

Detailed Description

The present invention will now be described in detail with reference to the drawings and examples.

Example 1

Referring to fig. 1, a preformed hole template of a large-diameter pipeline of a PC well chamber comprises a support ring frame 11, and a limiting rod 12 and/or an expansion rod 13 clamped on the outer wall of the support ring frame 11; the axial direction of the limiting rod 12, the axial direction of the telescopic rod 13 and the axial direction of the support ring frame 11 are consistent, the number of the limiting rods 12 and the number of the telescopic rods 13 are multiple, and a plurality of limiting rods 12 or a plurality of telescopic rods 13 are sequentially arranged in a circle along the outer ring wall of the support ring frame 11; the plurality of limit rods 12 and the plurality of telescopic rods 13 are arranged in a circle at intervals on the outer annular wall of the support ring frame 11 according to the shape of the support ring frame 11.

In this embodiment, the PC well is square, and therefore, the inner ring 1 and the outer ring 2 are circular with the same structure, and the preformed hole template formed at this time is cylindrical.

In this embodiment, the support ring frame 11 includes an inner ring 1 and an outer ring 2 which are disposed in parallel and coaxially; the connecting line between the axle center of the inner ring 1 and the axle center of the outer ring 2 is parallel to the axial direction of the limiting rod 12.

The material of the support ring frame 11 is HPB400 plain round steel bar, and is manufactured by a 3D wire forming machine. Each preformed hole template is provided with two supporting ring frames 11, the supporting ring frame 11 close to the inner die is an inner ring 1, and the supporting ring frame 11 close to the outer die is an outer ring 2; the inner ring 1 and the outer ring 2 are manufactured according to various elements of the PC well and the preformed hole respectively; the support ring frame 11 mainly serves as a stressed keel of the preformed hole template, resists deformation of the preformed hole template caused by concrete slurry pressure, and controls the telescopic amount of each telescopic rod 13, so that each telescopic rod 13 forms the appearance shape of the preformed hole template in order.

Although the circular preformed hole is an arc-shaped surface, the outer wall of the template is gently deformed, and the preformed hole template can be formed by adopting two modes. The first kind adopts gag lever post 12 and support ring frame 11 to form the preformed hole template alone, and the second kind also can adopt gag lever post 12 and telescopic link 13 and support ring frame 11 to form the preformed hole template. In this embodiment, the second type of template for forming the preformed hole is used.

Referring to fig. 5, the limiting rod 12 comprises a rectangular tube 3 and outer diameter tube ends 8 respectively arranged at two ends of the rectangular tube 3; the end 8 of the outer diameter pipe is respectively clamped with the rectangular pipe 3 and the supporting ring frame 11.

The limiting rod 12 is a non-telescopic rod and is located at the symmetrical end of the supporting ring frame 11 and used for initially connecting the inner ring 1 and the outer ring 2 and controlling the thickness of the wall of the preformed hole template, the axial direction of the limiting rod 12 is kept consistent along the direction of the pipeline, and the connecting line between the axis of the inner ring 1 and the axis of the outer ring 2 is parallel to the axial direction of the rectangular pipe 3. The section of the rectangular pipe 3 is rectangular and is made of steel.

Referring to fig. 6, the telescopic rod 13 comprises an outer diameter tube 4, an inner diameter tube 5, an extension sleeve 6, an extension rod 7, an outer diameter tube tip 8 and an inner diameter tube tip 9; one end of the inner diameter pipe 5 extends into the outer diameter pipe 4, and the other end of the inner diameter pipe 5 extends into the extension sleeve 6 and is connected with an extension rod 7 extending into the extension sleeve 6; the outer diameter pipe 4, the inner diameter pipe 5, the extension sleeve 6 and the extension rod 7 are coaxially arranged; the end 8 of the outer diameter pipe is arranged at one end of the outer diameter pipe 4 far away from the inner diameter pipe 5, and the end 8 of the outer diameter pipe is respectively clamped with the outer diameter pipe 4 and the support ring frame 11; the end head 9 of the inner diameter pipe is arranged at one end, far away from the inner diameter pipe 5, of the extension rod 7, and the end head 9 of the inner diameter pipe is respectively connected with the extension rod 7 and the support ring frame 11 in a clamping mode.

The telescopic rods 13 are spring-free telescopic rods and are orderly arranged on the support ring frame 11, the axial directions of the telescopic rods 13 are kept consistent along the pipeline direction, the telescopic range of the telescopic rods 13 is 90-150 mm, and the telescopic rods are used as plate ribs of the preformed hole template.

The section and the material of the outer diameter pipe 4 are the same as those of the rectangular pipe 3, the outer diameter of the inner diameter pipe 5 is matched with the inner diameter of the outer diameter pipe 4, and the inner diameter pipe 5 extends into the outer diameter pipe 4.

Referring to fig. 7, the end 8 of the outer diameter pipe comprises an outer diameter clamping block 81 and a ring clamping block a82 which are movably connected from top to bottom; the rectangular tube 3 or the outer diameter tube 4 is clamped in the outer diameter clamping block 81; the ring latch a82 is latched to the support ring holder 11.

Referring to fig. 8, the end 9 of the inner diameter tube comprises an inner diameter clamping block 91 and a ring clamping block B92 which are movably connected from top to bottom; the extension rod 7 is clamped in the inner diameter fixture block 91; the ring latch B92 is latched to the support ring holder 11.

In this embodiment, the ends are of two types, namely an outer diameter pipe end 8 and an inner diameter pipe end 9; the materials are plastics, and the outer diameter fixture block 81 is used for clamping the rectangular pipe 3 or the outer diameter pipe 4; the inside diameter fixture block 91 is used for clamping the extension rod 7, and the extension rod 7 can be inserted into the inside diameter fixture block 91 to be clamped with the telescopic rod 13. The ring clamping block B92 and the ring clamping block A82 are correspondingly clamped on the inner ring 1 or the outer ring 2 respectively; the lower structure can be rotated 360 deg. in the bottom plane of the upper structure.

The ring fixture block A82 is movably connected with the outer diameter fixture block 81, and can rotate 360 degrees in the bottom surface of the outer diameter fixture block 81.

The ring fixture block B92 is movably connected with the inner diameter fixture block 91, and can rotate 360 degrees in the bottom surface of the inner diameter fixture block 91.

The ring clamping block A82 and the ring clamping block B92 have the same structure and are square, a groove with a U-shaped opening is formed in one side surface, the opening is downward, and the ring clamping block A is clamped on the inner ring 1 or the outer ring 2, so that the connection is convenient.

The preformed hole template of the large-diameter pipeline of the PC well chamber also comprises a compensation block 14 adhered to the telescopic rod 13; the compensating block 14 is respectively adhered to the upper end surface of the outer diameter latch 81 and the upper end surface of the inner diameter latch 91. The compensating block 14 is a rectangular elastic rubber block, and the size of the section of the compensating block 14 is equal to that of the cross section of the outer diameter pipe 4; the compensation block 14 can be compressed and deformed to fill up an overlarge gap between the expansion link 13 and the template; the compensating block IV has various lengths of 5mm, 10mm, 15mm, 20mm and 25mm, and a compensating block 14 with a proper length is selected according to the size of the pore; the compensation block 14 is adhered to the end face of the upper structure of the end head of the telescopic rod through double faced adhesive tape, and along with the installation of the template, the compensation block 14 can generate compression deformation and section deflection, so that the gap between the telescopic rod 13 and the PC well curved template can be effectively compensated, and the surface layer 15 at the gap is supported.

The preformed hole template of the large-diameter pipeline of the PC well chamber also comprises a surface layer 15; the surface layer 15 is wrapped outside a ring enclosed by the limiting rod 12 and/or the telescopic rod 13; the surface layer 15 is a ring-shaped structure formed by winding the rubber sheet 10 and having the same structure as the outer surface of the support ring frame 11. The joint of the surface layer 15 is provided with a gap 16; the face layer 15 serves as a plate surface of the pre-perforated template.

Referring to fig. 9, in the present embodiment, since the inner ring 1 and the outer ring 2 are both circular rings, the surface layer 15 is spread out in a rectangular shape.

Example 2

Referring to fig. 2-4, unlike example 1, the PC well is a circular well, and the inner ring 1 and the outer ring 2 are three-dimensional profiles of similar but different structures.

In this embodiment, the outer wall of the template formed by the preformed holes is of a variable shape, and in this case, the preformed hole template can also be formed in two ways. Firstly, only adopting the telescopic rods 13 and the support ring frame 11 to form a preformed hole template, arranging a plurality of telescopic rods 13 on the outer ring wall of the support ring frame 11 in sequence for one circle, and adjusting the length of the telescopic rods 13 according to the three-dimensional special-shaped structure of the support ring frame 11; secondly, a preformed hole template can also be formed by the limiting rod 12, the telescopic rod 13 and the support ring frame 11.

In this embodiment, the second type of template for forming the preformed hole is used. When a large deformation part exists in the shape, the telescopic rod 13 is used as a template, the deformation of the PC well is gentle in appearance, and the limiting rod 12 is used for forming the template.

In this embodiment, the structure of the stopper rod 12 and the telescopic rod 13 is the same as that of embodiment 1, the outer diameter tube end 8 and the inner diameter tube end 9 are also the same as those of embodiment 1, and the compensation block 14 is also the same as that of embodiment 1.

Referring to fig. 10, in the present embodiment, the inner ring 1 and the outer ring 2 are both three-dimensional special-shaped circular rings, and the surface layer 15 is unfolded into a curved surface shape.

The utility model provides a preformed hole template includes following step when forming the template.

Step one, template installation simulation.

Simulating the installation process of the preformed hole template, taking the axis of the pipeline as an original point, establishing a rectangular coordinate system in a plane perpendicular to the axis, and numbering each telescopic rod 13; because the preformed hole template is symmetrical along the X axis and the Y axis, the telescopic rods 13 in a single quadrant of the preformed hole template are numbered, and the rest are symmetrically arranged; secondly, the installation simulation can discover the size of a gap between each telescopic rod 13 and the PC well template in advance, and notes are made on the telescopic rods 13 needing to be provided with the compensation blocks 14 (including the serial numbers of the telescopic rods 13 and the specifications of the compensation blocks 14); meanwhile, the installation simulation can know the telescopic length of each telescopic rod 13 in advance, and the telescopic rods 13 needing to be extended are remarked; finally, the three-dimensional data of the support ring frame 11 and the data of the unfolded surface of the surface layer 15 are respectively exported for the subsequent manufacture of the support ring frame 11 and the rubber sheet 10, and the simulation is completed through the existing software.

Step two, customizing the component.

Firstly, customizing the support ring frame 11, importing the exported data of the support ring frame 11 into a 3D wire forming machine to manufacture the HPB400 plain steel bar into the support ring frame 11, and marking lines on the uppermost end, the lowermost end, the leftmost end and the rightmost end of the support ring frame 11.

Next, the rubber sheet 10 is produced, and the rubber sheet 10 is cut based on data derived from simulation software.

And thirdly, customizing the limiting rod 12, customizing the rectangular pipe 3 with the corresponding length according to the wall thickness of the PC well product, installing the corresponding end head, and selecting the limiting rod 12 of the deformable template of the PC well preformed hole with the same wall thickness.

And finally, sequentially preparing the telescopic rods 13 according to the numbers, extending the telescopic rods 13 needing to be extended according to remarks of simulation results, and simultaneously pasting the corresponding compensation blocks 14.

And step three, assembling the preformed hole template.

First, the two ends of the stopper rod 12 are fixed to the uppermost end and the lowermost end of the inner ring 1 and the outer ring 2 of the support ring frame 11, respectively.

Secondly, the telescopic rods 13 are sequentially installed according to the serial numbers, two ends of the telescopic rods 13 are sequentially fixed on the inner ring 1 and the outer ring 2 of the supporting ring frame 11, and the axial direction of the telescopic rods 13 is consistent with the axial direction of the pipeline.

Finally, the rubber sheet 10 is spread on the surface of the template, and the joint of the surface layer 15 is bonded by glue. And finishing assembling the preformed hole template.

And step four, mounting the preformed hole template.

After the inner die of the PC well is installed, the preformed hole template is arranged at a specified position and coated with a coating agent, and the outer die is installed after the steel bars are bound.

And fifthly, dismantling the preformed hole template.

And after the PC well product reaches the form removal condition, sequentially removing the outer mold and the inner mold, removing the preformed hole template, and directly and integrally pulling out the preformed hole template from the preformed hole.

And step six, circulating the preformed hole template, and determining whether the preformed hole template needs to be disassembled according to the production arrangement of the PC well.

First, the surface layer v is detached from the prepared hole pattern plate, the rubber surface layer 15 is washed with an organic solvent such as alcohol to keep the surface layer 15 clean, and then the surface layer 15 is folded to be properly stored and easily recycled.

Secondly, dismantle telescopic link 13, gag lever post 12 in proper order, break away from the pole section with compensation piece 14, settle properly and preserve, be convenient for use next time.

And finally, coating the support ring frame 11 with an antirust agent, placing and storing, or disconnecting the joint of the support ring frame 11 and straightening the support ring frame 11 for recycling.

To sum up, this utility model structure is simple and easy, maneuverability is strong, facilitate promotion, is fit for the preparation of the preformed hole of the various big pipe diameter pipelines of various PC wells, makes PC well preformed hole template realize cyclic utilization, reduces the energy consumption of PC well product, practices the low carbon environmental protection theory of assembled product, and the device has great promotion effect to further reducing the energy consumption of town road engineering assembled technique.

Claims (10)

1. A preformed hole template of a large-diameter pipeline of a PC well chamber is characterized by comprising a support ring frame (11) and a limiting rod (12) and/or a telescopic rod (13) clamped on the outer wall of the support ring frame (11); the axial direction of the limiting rods (12), the axial direction of the telescopic rods (13) and the axial direction of the support ring frame (11) are consistent, the number of the limiting rods (12) and the number of the telescopic rods (13) are multiple, and a plurality of limiting rods (12) or a plurality of telescopic rods (13) are sequentially arranged for one circle along the outer ring wall of the support ring frame (11); the limiting rods (12) and the telescopic rods (13) are arranged on the outer ring wall of the supporting ring frame (11) at intervals in a circle according to the shape of the supporting ring frame (11).

2. The preformed hole template of the PC well chamber large-diameter pipeline according to claim 1, wherein the limiting rod (12) comprises a rectangular pipe (3) and outer diameter pipe end heads (8) respectively arranged at two ends of the rectangular pipe (3); the end heads (8) of the outer diameter pipes are respectively clamped with the rectangular pipes (3) and the supporting ring frame (11).

3. The preformed hole template of the PC well chamber large-diameter pipeline is characterized in that the telescopic rod (13) comprises an outer diameter pipe (4), an inner diameter pipe (5), an extension sleeve (6), an extension rod (7), an outer diameter pipe end (8) and an inner diameter pipe end (9); one end of the inner diameter pipe (5) extends into the outer diameter pipe (4), and the other end of the inner diameter pipe (5) extends into the extension sleeve (6) and is connected with an extension rod (7) extending into the extension sleeve (6); the outer diameter pipe (4), the inner diameter pipe (5), the extension sleeve (6) and the extension rod (7) are coaxially arranged; the outer diameter pipe end (8) is arranged at one end of the outer diameter pipe (4) far away from the inner diameter pipe (5), and the outer diameter pipe end (8) is clamped with the outer diameter pipe (4) and the support ring frame (11) respectively; the inner diameter pipe end socket (9) is arranged at one end of the extension rod (7) far away from the inner diameter pipe (5), and the inner diameter pipe end socket (9) is respectively connected with the extension rod (7) and the support ring frame (11) in a clamped mode.

4. The preformed hole template of the PC well chamber large-diameter pipeline according to claim 3, wherein the outer diameter pipe end (8) comprises an outer diameter clamping block (81) and a ring clamping block A (82) which are movably connected from top to bottom; the rectangular pipe (3) or the outer diameter pipe (4) is clamped in the outer diameter clamping block (81); the ring fixture block A (82) is clamped on the support ring frame (11).

5. The preformed hole template of the PC well chamber large-diameter pipeline according to claim 4, wherein the inner diameter pipe end (9) comprises an inner diameter clamping block (91) and a ring clamping block B (92) which are movably connected from top to bottom; the extension rod (7) is clamped in the inner diameter fixture block (91); the ring clamping block B (92) is clamped on the support ring frame (11).

6. The preformed hole template of the PC well chamber large-caliber pipeline as claimed in claim 5, wherein the ring fixture block A (82) and the ring fixture block B (92) are identical in structure.

7. The template for preparing holes of large-caliber pipes in a PC well chamber according to claim 6, wherein the support ring frame (11) comprises an inner ring (1) and an outer ring (2) which are arranged in parallel and coaxially; a connecting line between the axle center of the inner ring (1) and the axle center of the outer ring (2) is axially parallel to the limiting rod (12), and the ring clamping block B (92) and the ring clamping block A (82) are correspondingly clamped on the inner ring (1) or the outer ring (2) respectively.

8. The preformed hole template of the PC well chamber large-diameter pipeline is characterized by further comprising a compensation block (14) adhered to the telescopic rod (13); the compensation block (14) is respectively stuck on the upper end surface of the outer diameter fixture block (81) and the upper end surface of the inner diameter fixture block (91).

9. The preformed hole template of the PC well chamber large-diameter pipeline as claimed in any one of claims 1-8, wherein the preformed hole template of the PC well chamber large-diameter pipeline further comprises a surface layer (15); the surface layer (15) is wrapped outside a ring enclosed by the limiting rod (12) and/or the telescopic rod (13).

10. The preformed hole template of the PC well chamber large-diameter pipeline is characterized in that the surface layer (15) is an annular structure which is wound by a rubber sheet (10) and has the same structure as the outer surface of the support ring frame (11).

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