CN217027377U - Used protection device of preliminary treatment is carried out to serious drainage pipe that sinks - Google Patents

Abstract

The utility model relates to a protection device for pretreating a seriously collapsed drainage pipeline. The inner wall of the lower supporting piece is provided with an anti-skidding piece, and the upper supporting piece is connected with the lower supporting piece through a connecting buckle. The method solves the problems that drainage pipelines with serious collapse can not be constructed in a non-development mode in the non-excavation construction method engineering in the prior art, and the requirements on financial resources, material resources and time required by construction are increased. The protection device for preprocessing the drainage pipeline with serious collapse meets the construction process requirement of the drainage pipeline with serious collapse, and particularly solves the problem that no construction protection space is protected by constructors in the trenchless construction process. Furthermore, when the middle part of the drainage pipeline collapses and the collapse distance is greater than the size of a construction tool of a constructor, a protection space needs to be provided for the constructor to meet the construction requirement.

Description

Protection device for pretreatment of seriously collapsed drainage pipeline

Technical Field

The utility model relates to the technical field of structural design of constructor protection devices used by a non-excavation repair method for a drainage pipeline with serious collapse, in particular to a protection device for pretreating the drainage pipeline with serious collapse.

Background

In the long-term use process of the drainage pipeline, the damage of the drainage pipeline happens sometimes due to geological changes and the changes of ground bearing objects.

In the prior art, a non-excavation repairing method is adopted for a drainage pipeline with serious collapse to achieve a good repairing effect (the influence on road operation is avoided, and pollution and damage on a construction site are reduced). When the trenchless repairing method is adopted, the pretreatment of the collapse part by the qualified construction quality is basic work, and the final construction result, quality and construction progress are directly determined by the quality of the pretreatment.

In the patent numbers: 201720002025.4, the patent names: a pipe pushing head and a pipeline replacing device for trenchless construction are disclosed. The construction method is reasonable in use when the pipeline is not damaged, particularly when the small-aperture pipeline is replaced by the large-aperture pipeline. But will not be satisfactory for drainage pipeline construction with severe collapse.

In the prior art, in a non-excavation construction method project, a drainage pipeline with serious collapse cannot be constructed in a non-development mode, so that the construction efficiency is low, and the requirements on financial resources, material resources and time required by construction are increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model mainly aims to provide a protection device for pretreating a seriously collapsed drainage pipeline, which can meet the trenchless construction requirement of the seriously collapsed drainage pipeline, improve the construction efficiency and ensure that a safety protection space is provided for constructors.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a protective device for pre-treatment of a severely collapsed drain pipeline, comprising: an upper support and a lower support; the upper supporting piece and the lower supporting piece are detachably connected, and a protection cavity is defined by the upper supporting piece and the lower supporting piece.

In a preferred embodiment, the lower support is provided with a skid-proof member on the inner wall thereof.

In a preferred embodiment, the upper support and the lower support are connected by a connecting buckle.

In a preferred embodiment, the connection buckle comprises: go up buckle, lower buckle and connector, connector one end is provided with buckle and lower buckle, go up the buckle and leave between the buckle down and be equipped with the rebound chamber, run through the connecting hole has been seted up to the connector, through the bolted connection who passes the connecting hole between the adjacent connector link.

In a preferred embodiment, a connecting notch is formed through the upper support and the lower support; the width of the connecting notch is the same as the width of the upper buckle and the lower buckle.

In a preferred embodiment, the connector link includes: an upper connecting buckle and a lower connecting buckle; the upper connecting buckle is connected to the inner wall of the lower end of the upper supporting piece, the lower connecting buckle is connected to the inner wall of the lower supporting piece, and the upper connecting buckle and the lower connecting buckle are connected through bolts.

In a preferred embodiment, the upper supporting member and the lower supporting member are both arc plates, and the arc plates of the upper supporting member and the lower supporting member enclose the cylindrical protection cavity.

In a preferred embodiment, the arc angle of the lower support is equal to 180 °, two upper supports are provided, and the arc angle of each upper support is 90 °, so that each two upper supports and one lower support enclose a 360 ° circular cavity.

In a preferred embodiment, the upper ends of the upper supporting pieces are provided with connecting plates in a downward bending mode, and the upper supporting pieces are connected through connecting pieces penetrating through the connecting plates.

In a preferred embodiment, at least two nuts are connected to the lower end of the bolt, the two end portions of the anti-slip member are sleeved on the lower sides of the nuts of the bolt, and the extending end of the bolt on the lower side of the anti-slip member is fixed by the nuts.

In a preferred embodiment, the anti-slip member comprises: the two end parts of the antiskid plate are respectively fixedly connected with the bolts, and the radius of the antiskid plate is the same as that of the lower supporting piece; the anti-skid plate is characterized in that the anti-skid rod is fixedly connected to the inner wall of the anti-skid plate, and a bow-shaped cavity is formed below the anti-skid rod.

In a preferred embodiment, the thickness of the circular arc plate of each of the upper support member and the lower support member is 5-8 mm.

In a preferred embodiment, the middle part of the upper end of the lower support is convexly provided with a connecting convex edge, the middle part of the lower end of the lower support is concavely provided with a connecting groove, and the connecting convex edge is matched with the connecting groove and clamped into the connecting groove.

In a preferred embodiment, the upper end of the lower support and the lower end of the upper support both protrude in the inward arc transition, so that the width of the upper end of the lower support and the lower end of the upper support is 1.5 to 2 times the thickness.

The protection device for pretreating seriously collapsed drainage pipelines has the following beneficial effects:

the protection device for pretreating the seriously collapsed drainage pipeline comprises: an upper support and a lower support; the upper supporting piece and the lower supporting piece are detachably connected, and a protection cavity is defined by the upper supporting piece and the lower supporting piece. The inner wall of the lower supporting piece is provided with an anti-slip piece, and the upper supporting piece and the lower supporting piece are connected through a connecting buckle;

the method solves the problems that drainage pipelines with serious collapse cannot be constructed in a non-development mode in the non-excavation construction method engineering in the prior art, so that the construction efficiency is low, and the requirements on financial resources, material resources and time required by construction are increased.

The protection device for preprocessing the drainage pipeline with serious collapse meets the construction process requirement of the drainage pipeline with serious collapse, and particularly solves the problem that no construction protection space is protected by constructors in the trenchless construction process. Furthermore, when the middle part of the drainage pipeline collapses and the collapse distance is greater than the size of a construction tool of a constructor, a protection space needs to be provided for the constructor to meet the construction requirement. Through this protection device, can install gradually, discharge the inside thing that sinks gradually, guarantee the constructor constantly within the safe space scope, finally satisfy the requirement of non-excavation construction.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a protective device for pre-treatment of a severely collapsed drain pipeline according to one embodiment of the present disclosure;

fig. 2 is an enlarged view of a portion of the protective device of fig. 1 at a.

[ description of main component symbols ]

1. An upper support member; 11. a connecting plate; 12. a connecting member;

2. a lower support; 21. connecting the convex ribs;

3. a protection cavity;

4. a connecting buckle; 41. mounting a buckle; 42. a lower buckle; 43. a linker; 44. a rebound cavity; 45. a bolt;

401. connecting buckles are arranged; 402. a lower connecting buckle;

5. an anti-slip member; 51. an anti-slip bar; 52. an anti-skid plate; 53. an arcuate cavity.

Detailed Description

The protection device for pre-treating a severely collapsed drainage pipeline according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances such that, for example, embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 and 2, the protection device for pre-treating a collapsed severe drainage pipeline comprises: an upper supporting member 1 and a lower supporting member 2 which enclose a protection cavity 3; the upper supporting piece 1 and the lower supporting piece 2 are detachably connected, and the upper supporting piece 1 and the lower supporting piece 2 enclose a protection cavity 3.

A safe construction space is provided for constructors through the protection cavity 3, and the support effect on the seriously collapsed section is realized. Through setting up support piece 1 and bottom suspension member 2, constructor discharges the inside thing that collapses inside, and it is fixed with another support piece 1 and bottom suspension member 2 installation again, continuous use provides the construction protection cavity for drainage pipe.

Because the inner wall of the lower support piece 2 is a smooth inner wall, in the excavation construction process of collapsed materials, constructors cannot support the direction of the protection cavity 3 on the smooth inner wall of the protection cavity 3. The constructor can't guarantee to the thrust of collapse thing when passing through the instrument construction, takes place constructor sole skid easily, the defect of unable construction. Therefore, the anti-skid piece 5 is arranged on the inner wall of the lower support piece 2, and the constructor can step on the upper side of the anti-skid piece 5 by feet through the arrangement of the anti-skid piece 5, so that the smooth construction process is ensured.

When the construction and excavation are finished and drainage pipelines need to be laid and excavated collapsed materials need to be conveyed out from the interior of the protection cavity 3, the anti-skid device 4 can be disassembled to ensure that the bottom of the lower support member 2 is in a smooth state, and the drainage pipelines or the collapsed materials can be directly conveyed out along the smooth lower support member 2.

In order to facilitate the installation of the upper support 1 and the lower support 2, especially in the long-distance pipeline requirement, a plurality of upper supports 1 and lower supports 2 are needed to meet the requirement, and after the former one is installed, the construction is not influenced in order to avoid the interference of the transportation with the latter one. Furthermore, the assembly and construction on site are facilitated by a split installation mode, and the construction efficiency is improved. The upper supporting piece 1 and the lower supporting piece 2 are detachably connected through a connecting buckle 4. In the field construction process, the upper support member 1 and the lower support member 2 are detached, and after the lower support member 2 and the upper support member 1 are respectively transported to a working surface, the upper support member 1 is firstly installed at the upper end of the lower support member 2 according to the lower support member 2, so that the enclosure of the protection cavity 3 is completed.

The installation of the connecting buckle 4 is convenient, and particularly, the connecting buckle 4 protruding out of the protection cavity 3 is prevented from influencing the transportation of materials.

A plurality of upper and lower supports 1 and 2 are generally required to be used continuously to satisfy a required length for construction. Therefore, the multistage protection cavities 3 can be connected with each other in the construction process, and the construction requirements are met. Specifically, during the process of transporting the lower support member 2 of the next stage inside the protection chamber 3 of the previous stage, the lower support member 2 is usually required to slide along the inner wall of the protection chamber 3 of the previous stage due to its large size. In order to facilitate the detachment of the connector link 4, the connector link 4 includes: an upper buckle 41 and a lower buckle 42 of the bolt type buckle structure; connecting bodies 43 which are connected to each other. One end of the connecting body 43 is provided with (fixed connection or integrated molding) an upper buckle 41 and a lower buckle 42 (the upper buckle 41 and the lower buckle 42 are preferably made of steel and have higher strength and toughness), and in order to ensure a rebound space, a rebound cavity 44 is reserved between the upper buckle 41 and the lower buckle 42. In order to facilitate the connection between the adjacent connecting buckles 4, a connecting hole is formed through the connecting body 43, and the adjacent connecting buckles 4 are connected through a bolt 45 passing through the connecting hole. The bolt 45 is connected in a manner convenient to operate.

In a preferred embodiment, a hexagonal groove is formed on the upper surface of the connecting body 43 of the connecting buckle 4 connected to the upper support member 1, and the size of the hexagonal groove is the same as the size of the head of the bolt 45. In the installation, bolt 45 inserts along the connecting hole, and the spiral shell head of bolt 45 stretches into the hexagon recess, and the rotation of restriction bolt 45, the nut of a constructor direct twisting below can be in order to realize the connection to connector link 4. The single-person operation is realized, and the operation and construction are convenient in a narrow space.

In order to adapt to the connection of the connecting buckle 4 with the upper supporting piece 1 and the lower supporting piece 2, a connecting notch with a square structure is formed through the upper supporting piece 1 and the lower supporting piece 2; the width of the connecting slot is the same as the width of the upper and lower catches 41, 42. Furthermore, the connecting buckle 4 is limited and connected through the connecting notch.

Specifically, the connection buckle 4 includes: an upper connecting buckle 401 and a lower connecting buckle 402; the upper connecting buckle 401 is connected to the inner wall of the lower end of the upper support 1, the lower connecting buckle 402 is connected to the inner wall of the lower support 2, and the adjacent upper connecting buckle 401 and the lower connecting buckle 402 are connected through the bolt 45.

In order to improve the bearing capacity, the structure is simple and easy, the structure is adapted to a general drainage pipeline structure, and the excavation space required by construction is reduced. The upper supporting part 1 and the lower supporting part 2 are both arc plates, and the arc plates of the upper supporting part 1 and the lower supporting part 2 enclose a cylindrical protection cavity 3. The protection cavity 3 with the cylindrical structure can meet the construction requirement and can also ensure the bearing capacity.

Preferably, the circular arc angle of the lower support member 2 is equal to 180 °, and during the construction process, the lower support member 2 is installed at first, and the upper end part of the lower support member 2 is horizontal (or nearly horizontal), so that the contact surface with the lower support member 2 is in a horizontal state in the installation process of the upper support member 1, thereby facilitating the matching connection between the two, and avoiding the defects of dislocation and inconvenient connection. Further preferably, the number of the upper supporting members 1 is two, so as to avoid the inconvenience of mounting one upper supporting member 1 on the upper end of the lower supporting member 2 due to a large size. In order to facilitate the replacement of the upper supporting members 1, the arc angle of each upper supporting member 1 is 90 °, so that each two upper supporting members 1 and one lower supporting member 2 enclose a 360 ° circular cavity. Further, two the same upper supporting pieces 1 can guarantee that the atress is balanced, the structure that the symmetry set up, every upper supporting piece 1 atress is the same, guarantees intensity, avoids single atress too big damage, influences whole construction.

In order to ensure the connection strength of the upper support members 1, the upper ends of the upper support members 1 are provided with connecting plates 11 in a downward bending manner, and the upper support members 1 are connected through connecting pieces 12 penetrating through the connecting plates 11.

In the construction process, install the lower support piece 2 of downside at first, install the upper support piece 1 of one side again, the upper support piece 1 of opposite side is spacing blocking through connecting plate 11 earlier, and the mode of rethread striking is gone into upper support piece 1 card and is gone into. In order to stabilize it, the connection plates 11 are connected in time by means of the connecting pieces 12 after being mounted in place. And the upper supporting piece 1 and the lower supporting piece 2 are fixedly connected through the connecting buckle 4.

In order to facilitate the installation and the disassembly of the anti-skid member 5, the lower end part of the bolt 45 is at least connected with two nuts, the two end parts of the anti-skid member 5 are sleeved on the lower sides of the nuts of the bolt 45, and the extending end of the bolt 45 on the lower side of the anti-skid member 5 is fixed through the nuts.

Namely: the two ends of the antiskid piece 5 are provided with fixing holes, the screw rod at the lower end of the bolt 45 extends out of the fixing holes, nuts are arranged on the upper side and the lower side of each fixing hole, the nuts on the upper side are fixedly connected with the adjacent connecting buckles 4, and the nuts on the lower side are fixedly connected with the antiskid piece 5. When the anti-skid member 5 needs to be detached separately, the detachment of the anti-skid member 5 can be realized only by detaching the nut on the lower side of the fixing hole. Satisfied in the work progress, before 3 installations to next-level protection cavity, constructor needs support piece when needing the excavation, can provide the support for constructor through antiskid 5, after the excavation finishes, when needing to transport support piece 3 down, avoids the interference of antiskid 5, can demolish antiskid 5 fast alone.

In order to improve the antiskid effect of the antiskid piece 5, the influence of sludge on the antiskid piece 5 in the excavation process is avoided, and the antiskid effect cannot be met. The anti-slip member 5 includes: a skid bar 51 mainly providing a supporting force, and a skid plate 52 fixedly connected with the bolts 45 at the two ends.

The two ends of the anti-skid plate 52 are respectively fixedly connected with the bolts 45, the two ends of the anti-skid plate 52 are bent to form connecting discs, fixing holes are formed in the connecting discs in a penetrating mode, and the fixing holes are connected with the bolts. The radius of the antiskid plate 52 is the same as that of the lower support member 2, so that the antiskid plate 52 is tightly attached to the lower support member 2, the antiskid plate 52 is prevented from rotating relative to the lower support member 2, and the antiskid effect of the antiskid member 5 is ensured. In order to influence the anti-skid performance of the anti-skid member 5 by the sludge remained at the anti-skid member 5, the anti-skid member cannot meet the anti-skid effect, and the anti-skid member 5 is inconvenient to detach due to the arrangement. The anti-skid rod 51 is fixedly connected with the inner wall of the anti-skid plate 52, and an arch cavity 53 is formed below the anti-skid rod 51. Realize the antiskid effect through skid resistant bar 51, when having sludge residue in antiskid 5 departments, because skid resistant bar 51 downside is the cavity structure, mud tramples the in-process at the constructor, discharges along bow-shaped chamber 53, avoids causing the influence to skid resistant bar 51.

Further, it is preferable that the maximum distance of the anti-slip bar 5 from the lower support 2 is 10-15 cm. 1/2, which is basically at the length of the adult male shoe, improves the stability of the constructor for stepping on the anti-skid bar 5.

In order to ensure the supporting strength, reduce the production cost and reduce the weight, the thicknesses of the circular arc plates of the upper supporting member 1 and the lower supporting member 2 are preferably 5-8 mm. Preferably, the thickness of each circular arc plate is 6 mm.

Furthermore, the construction progress requirement is selected, and the construction is safe. The defect of excavation collapse caused by no supporting device in the excavation process at every time is avoided. And in order to adapt to the length of the constructor tool in the protection cavity 3, the problem that the constructor stretches into a non-support area for construction is avoided. The length of the upper support 1 and the lower support 2 is selected to be 500 mm.

In order to improve the connection effect of the lower support member 2 and the upper support member 1, especially during the process of just installing the upper support member 1, the lower support member and the upper support member are not fixedly connected through the connecting buckle 4 and the connecting piece 12 in time. A connecting convex edge 21 is convexly arranged in the middle of the upper end of the lower support part 2 (the connecting convex edge 21 can be arranged along the length direction of the lower support part 2 in a whole manner), a connecting groove is concavely arranged in the middle of the lower end of the lower support part 2, and the connecting convex edge 21 is clamped into the connecting groove in a matching manner. Equivalently, the lower supporter 2 is caught to the upper supporter 1 by the fitting connection between the coupling protrusions 21 and the coupling grooves. Since the upper support 1 is pressed down by the top collapsed during the installation process, a certain pressure exists, so that the upper support 1 is pressed down to be connected to the upper side of the lower support 2.

In order to ensure the strength of the connecting convex edge 21 and the connecting groove and avoid the situation that the strength cannot be ensured in a small size, the damage is caused and the pre-tightening connection effect cannot be met (when the connecting buckle 4 does not play a connection role, the connection requirement is met through the connection of the connecting convex edge 21 and the connecting groove), the upper end part of the lower support piece 2 and the lower end part of the upper support piece 1 are in inward smooth arc transition protrusion, so that the widths of the upper end part of the lower support piece 2 and the lower end part of the upper support piece 1 are 1.5-2 times of the thickness.

The application uses a sewage pipeline to adopt a short pipe lining repairing technology as a basis (a 4.5-meter-long section which is completely collapsed exists in the pipeline, a large number of concrete blocks are mixed, even a plurality of blocks have diameters exceeding the pipe diameter, the pretreatment difficulty is large, the pipe diameter is only DN500, and workers cannot enter the pipeline for cleaning). When the sewage pipeline collapse position is pretreated, the adopted protection device, namely a prefabricated steel pipe protective cylinder (the steel pipe protective cylinder is a combined prefabricated part and is divided into three parts, the wall thickness of a pipe piece is 6mm, and the width of the pipe piece is 500 mm.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A protection device for pretreatment of a severely collapsed drain pipeline, comprising: an upper support (1) and a lower support (2); the upper supporting piece (1) and the lower supporting piece (2) are detachably connected, and the upper supporting piece (1) and the lower supporting piece (2) enclose a protection cavity (3);

an anti-skid piece (5) is arranged on the inner wall of the lower support piece (2);

the upper supporting piece (1) is connected with the lower supporting piece (2) through a connecting buckle (4);

the connection buckle (4) comprises: the connecting structure comprises an upper buckle (41), a lower buckle (42) and a connecting body (43), wherein one end of the connecting body (43) is provided with the upper buckle (41) and the lower buckle (42), a rebound cavity (44) is reserved between the upper buckle (41) and the lower buckle (42), a connecting hole penetrates through the connecting body (43), and adjacent connecting buckles (4) are connected through a bolt (45) penetrating through the connecting hole;

a connecting notch penetrates through the upper supporting piece (1) and the lower supporting piece (2); the width of the connecting notch is the same as the width of the upper buckle (41) and the lower buckle (42).

2. The protection device for the pretreatment of a severely collapsed drainline according to claim 1, wherein the connection clasp (4) comprises: an upper connecting buckle (401) and a lower connecting buckle (402); go up connector link (401) and connect at last support piece (1) lower extreme inner wall, connector link (402) are connected down support piece (2) inner wall, it is adjacent go up connector link (401) and connector link (402) are connected through bolt (45) down.

3. The protection device for pre-treatment of a severely collapsed drainpipe according to claim 2, characterized in that the upper support (1) and the lower support (2) are both circular arc plates, and the circular arc plates of the upper support (1) and the lower support (2) enclose the cylindrical protection cavity (3).

4. The protection device for pre-treatment of severely collapsed drainpipes according to claim 3, characterized in that the arc angle of the lower support (2) is equal to 180 °, that the upper support (1) is provided in two, and that the arc angle of each upper support (1) is 90 °, so that every two upper supports (1) and one lower support (2) enclose a 360 ° circular cavity.

5. The protection device for pre-treating a collapsed severe drainage pipeline according to claim 4, wherein the upper support (1) is provided with a connecting plate (11) at the upper end which is bent downwards, and the upper support (1) is connected with each other through a connecting piece (12) which is arranged through the connecting plate (11).

6. The protection device for pre-treating the seriously collapsed drainage pipeline according to claim 4, wherein the lower end part of the bolt (45) is connected with at least two nuts, the two end parts of the anti-skid member (5) are sleeved on the lower sides of the nuts of the bolt (45), and the extending end of the bolt (45) on the lower side of the anti-skid member (5) is fixed by the nuts.

7. The protection device for pre-treatment of a severely collapsed drainline according to claim 6, characterized in that the skid (5) comprises: the anti-skid device comprises an anti-skid rod (51) and anti-skid plates (52), wherein two end parts of each anti-skid plate (52) are fixedly connected with a bolt (45), and the radius of each anti-skid plate (52) is the same as that of the lower supporting piece (2); the anti-skid device is characterized in that the anti-skid rod (51) is fixedly connected to the inner wall of the anti-skid plate (52), and an arch cavity (53) is formed below the anti-skid rod (51).

8. The protection device for pre-treatment of a collapsed severe drainage pipeline according to claim 3, wherein the arc plate thickness of the upper support (1) and the lower support (2) is 5-8 mm.

9. The protection device for pre-treating a severely collapsed drainable pipeline according to claim 3, wherein the lower support member (2) is provided with a convex connecting rib (21) at the middle of the upper end, the lower support member (2) is provided with a concave connecting groove at the middle of the lower end, and the connecting rib (21) is adapted to be clamped into the connecting groove.

10. The protection device for pre-treatment of a collapsed severe drainage pipeline according to claim 9, wherein the upper end part of the lower support (2) and the lower end part of the upper support (1) are both protruded towards the inner arc transition, so that the width of the upper end part of the lower support (2) and the lower end part of the upper support (1) is 1.5-2 times of the thickness.

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