A cable protection pipe grit cleaning device and method of use

Abstract

The application discloses a cable protection pipe sand cleaning device and a use method, and relates to the technical field of cable protection pipe maintenance. The cable protection pipe sand cleaning device comprises a force bearing rod, filter bodies and a cover body. A plurality of buckling grooves which are matched with the circles of the filter bodies are formed in the force bearing rod. The plurality of filter bodies are arranged from top to bottom and are connected with the force bearing rod through the buckling grooves. The cover body is provided with first tenons which are matched with mortises on the filter bodies. The mortises and the first tenons are connected through clamping to form a mortise and tenon structure. The filter bodies are connected with the cover body through the mortise and tenon structure. The technical problem that the inner wall of the cable protection pipe is easily damaged in the process of dragging the cable is solved. The four-layer filter bodies with diameters gradually decreasing from large to small are used to form a sand filtering part of the device, different aperture filter bodies are installed on each layer, sand can be filtered layer by layer, and the cleaning effect is ensured.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe inspection and maintenance technology, and in particular to a cable protection pipe sand and gravel cleaning device and its usage method. Background Technology

[0002] Currently, in the process of urbanization, laying power cables underground has become increasingly important in order to meet the requirements of environmental protection and development and to make efficient use of urban space. The existing method of laying cables underground mostly uses PE or PVC pipes as cable protection conduits. These cable protection conduits not only serve as the carrier for the cables but also protect the circuits from external damage.

[0003] In existing technologies, multiple cable protection pipes are first pre-buried underground using a pipe jacking method. Then, the ends of the cable protection pipes without cables are sealed. When cables need to be placed, the sealing plates are removed, the cables are threaded through the first end of the cable protection pipe, and tools are used to drag the cables to the second end, completing the cable placement. However, due to the use of unreasonable sealing methods, substandard sealing materials, sealing templates, and substandard sealing processes, the inside of the cable protection pipes becomes filled with sand and gravel, requiring timely cleaning.

[0004] Therefore, the existing technology usually involves dragging the cable from one end of a cable protection pipe filled with sand and gravel to the other, and carrying the sand and gravel out during the process to clean the inside of the cable protection pipe. However, in the process of dragging the cable, the outer layer of the cable rubs against the sand and gravel, which causes serious damage to both the outer layer of the cable and the inner wall of the cable protection pipe, seriously affecting the safe and reliable operation in the future. Summary of the Invention

[0005] This invention provides a cable protection pipe sand and gravel cleaning device and method, which solves the technical problem that in the existing technology, during the process of dragging the cable, the outer layer of the cable rubs against the sand and gravel, causing serious damage to both the outer layer of the cable and the inner wall of the cable protection pipe, which seriously affects the safe and reliable operation in the future.

[0006] The first aspect of the present invention provides a cable protection pipe sand and gravel cleaning device, the cable protection pipe sand and gravel cleaning device includes a support rod, a filter body and a cover body;

[0007] The support rod is provided with multiple fastening grooves that fit the circles of the filter body;

[0008] Multiple filter elements are arranged from top to bottom and are respectively connected to the support rod through the fastening groove;

[0009] The cover is provided with a first tenon that matches the mortise on the filter body;

[0010] The mortise and the first tenon are engaged to form a mortise and tenon structure;

[0011] The filter body is connected to the cover body via the mortise and tenon structure.

[0012] Optionally, the filter body includes a circular filter body and an annular filter body, and the mortises on the filter body include a first mortises and a second mortises;

[0013] The circular filter body has multiple first mortises;

[0014] The annular filter body is respectively provided with a second mortise, a second tenon, a first protrusion and a first groove;

[0015] Two adjacent annular filter bodies are connected by the first protrusion and the first groove;

[0016] The second tenon engages with the first mortise.

[0017] Optionally, the plurality of filter elements are respectively a first filter element, a second filter element, a third filter element, and a fourth filter element;

[0018] The first filter body has multiple first circular holes;

[0019] The second filter body has multiple second circular holes;

[0020] The third filter body has multiple third circular holes;

[0021] The fourth filter body has multiple fourth circular holes.

[0022] Optionally, the cover includes a plurality of movable parts connected in sequence;

[0023] Each of the aforementioned movable parts is provided with multiple first tenons, second protrusions, and second grooves;

[0024] The second protrusion of the previous movable component and the second groove of the next movable component engage;

[0025] The first tenon is engaged with either the first mortise or the second mortise.

[0026] Optionally, all the moving parts are assembled to form a cylindrical cover.

[0027] Optionally, a tapered groove is provided on the inner sidewall of the movable component.

[0028] Optionally, the inner wall of the moving part is configured as a rough sidewall, and the outer wall is configured as a smooth sidewall.

[0029] Optionally, a ring is provided at the top of the load-bearing rod.

[0030] Optionally, it also includes a pull cord;

[0031] One end of the pull wire is mounted on the ring, and the other end extends to the end of the cable protection pipe.

[0032] A second aspect of the present invention provides a method of using a sand and gravel cleaning device for cable protection pipes as described in any of the preceding claims, comprising:

[0033] Secure the guy wire to the ring on the support rod.

[0034] Install each filter element on the support rod from top to bottom according to the preset circular hole diameter;

[0035] The first tenons on the cover are respectively engaged with the mortises on the filter body to form an integrated cable protection pipe sand and gravel cleaning device;

[0036] The sand and gravel cleaning device for the cable protection pipe is placed inside the first end of the cable protection pipe;

[0037] The cable protection pipe sand and gravel cleaning device is pulled to the end of the cable protection pipe by the pull line, and the sand and gravel inside the cable protection pipe are cleaned.

[0038] As can be seen from the above technical solutions, the present invention has the following advantages:

[0039] 1. This invention employs a four-layer filter system with progressively smaller diameters to form the sand and gravel filtration section of the device, with each layer containing a filter element of a different pore size. This design allows for layer-by-layer filtration of sand and gravel, ensuring effective cleaning and preventing larger pieces of sand and gravel from clogging the device.

[0040] 2. This invention utilizes a mortise and tenon structure to design the movable parts of the filter body and cover, which allows for adjustment of the cleaning device radius. This enables the cable protection pipe sand and gravel cleaning device to adapt to cable protection pipes of different radii, improving the cleaning flexibility and applicability. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a sand and gravel cleaning device for a cable protection pipe provided in an embodiment of the present invention.

[0043] Figure 2 This is a schematic diagram of a sand and gravel cleaning device for cable protection pipes provided in an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the load-bearing rod of a sand and gravel cleaning device for cable protection pipes provided in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of the first filter element of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of the structure of an annular filter body of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of the second filter element of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0048] Figure 7 A schematic diagram of the structure of the third filter element of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0049] Figure 8 This is a schematic diagram of the structure of the fourth filter element of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram of the moving parts of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0051] Figure 10 This is a schematic diagram of the inner side of the moving part of a sand and gravel cleaning device for cable protection pipes provided in an embodiment of the present invention;

[0052] Figure 11 This is a schematic diagram of the outer side of the moving part of a sand and gravel cleaning device for cable protection pipes provided in an embodiment of the present invention;

[0053] Figure 12 This is a schematic diagram of the structure of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention, showing the connection of two moving parts;

[0054] Figure 13 This is a schematic diagram of the structure of the cover of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention;

[0055] Figure 14 This is a flowchart illustrating the steps of using a cable protection pipe sand and gravel cleaning device applied to any of the above embodiments, as provided in an embodiment of the present invention.

[0056] The meanings of the reference numerals in the attached figures are as follows:

[0057] 1. Cable protection pipe; 2. Cable protection pipe sand and gravel cleaning device; 21. Supporting rod; 211. Rod body; 212. Ring; 213. First layer; 214. Second layer; 215. Third layer; 216. Fourth layer; 22. Cover; 221. Moving part; 222. Second protrusion; 223. First tenon; 224. Second groove; 225. Conical groove; 23. First filter body; 231. First circular hole; 24. Circle; 25. First mortise; 26. Second filter body; 261. Second circular hole; 27. Third filter body; 271. Third circular hole; 28. Fourth filter body; 281. Fourth circular hole; 29. ​​Annular filter body; 291. First groove; 292. Second tenon; 293. First protrusion; 294. Second mortise. Detailed Implementation

[0058] This invention provides a cable protection pipe sand and gravel cleaning device and method for use, which solves the technical problem that in the process of dragging cables, the outer layer of the cable rubs against sand and gravel, causing serious damage to both the outer layer of the cable and the inner wall of the cable protection pipe, which seriously affects the safe and reliable operation in the future.

[0059] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0060] Please see Figure 1-8 , Figure 1 This is a schematic diagram of a sand and gravel cleaning device for cable protection pipes provided in an embodiment of the present invention.

[0061] The present invention provides a cable protection pipe sand and gravel cleaning device 2, which includes a support rod 21, a filter body and a cover 22; the support rod 21 is provided with a plurality of fastening grooves that are adapted to the circles 24 of the filter body; the plurality of filter bodies are arranged from top to bottom and are respectively connected to the support rod 21 through the fastening grooves; the cover 22 is provided with a first tenon 223 that is adapted to the mortise on the filter body; the mortise and the first tenon 223 are engaged to form a mortise and tenon structure; the filter body is connected to the cover 22 through the mortise and tenon structure.

[0062] It should be noted that the support rod 21 can be configured as four layers from top to bottom, each layer having an annular locking groove. Each layer is used to install the filter body. The layer closest to the beginning of the support rod 21 is defined as the first layer 213, followed by the second layer 214, the third layer 215, and the last layer 216. There are four filter bodies, each capable of filtering sand and gravel of different diameters. The four filter bodies are arranged in order of the diameter of the sand and gravel they can filter. The filter body that is first installed in the first layer 213 of the support rod 21 is installed in the second layer 214, the third layer 215, and the fourth layer 216. Each filter body has a circle 24 in the center that engages with the annular locking groove. The filter body is connected to the support rod 21 through the engagement of the circle 24 and the locking groove.

[0063] Each filter element has multiple mortises, and the cover 22 has a first tenon 223 that matches the mortises. The mortises and the first tenon 223 engage to form a mortise and tenon structure. The filter element is connected to the cover 22 through the mortise and tenon structure to form an integrated cable protection pipe sand and gravel cleaning device 2. The mortise and tenon structure is tightly interlocked and not easy to loosen. After sand and gravel enter this device, it prevents the filter element and cover 22 from scattering due to collisions. The first tenon 223 is specifically a tenon, and is defined as the first tenon 223 to distinguish the position / relationship between the tenons.

[0064] Specifically, when sand and gravel enter the sand and gravel cleaning device 2 of the cable protection pipe, they enter different filter bodies according to the diameter of the sand and gravel, and are restricted between the filter bodies, thereby being carried out of the cable protection pipe 1.

[0065] Specifically, the number of layers of the load-bearing rod 21, the number of filter elements, and the number of mortises are for illustrative purposes only, and the specific quantities are not limited and can be set according to the actual situation.

[0066] Please see Figure 4-9 , Figure 4 This is a schematic diagram of the structure of the first filter element of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention.

[0067] This invention provides a cable protection pipe sand and gravel cleaning device. The filter body includes a circular filter body and an annular filter body 29. The mortises on the filter body include first mortises 25 and second mortises 294. The circular filter body has multiple first mortises 25. The annular filter body 29 is provided with second mortises 294, second tenons 292, first protrusions 293 and first grooves 291 respectively. Two adjacent annular filter bodies 29 are connected by first protrusions 293 and first grooves 291. The second tenons 292 are engaged with the first mortises 25. The multiple filter bodies are a first filter body 23, a second filter body 26, a third filter body 27 and a fourth filter body 28. The first filter body 23 has multiple first circular holes 231. The second filter body 26 has multiple second circular holes 261. The third filter body 27 has multiple third circular holes 271. The fourth filter body 28 has multiple fourth circular holes 281.

[0068] It should be noted that the first circular hole 231 is a large circular hole; the second circular hole 261 is a medium circular hole; the third circular hole 271 is a small circular hole; the fourth circular hole 281 is the smallest circular hole; the first filter body 23 is a filter body with a large circular hole; the second filter body 26 is a filter body with a medium circular hole; the third filter body 27 is a filter body with a small circular hole; and the fourth filter body 28 is a filter body with the smallest circular hole.

[0069] Specifically, the diameter of the circular holes for each model can be set according to the actual situation, and is not limited here. They can be arranged as large, medium, small and smallest, and installed in the corresponding number of layers according to the diameter of the circular holes.

[0070] Specifically, see Figure 4 A filter element with large circular holes is installed at the head end of the support rod 21, which is the first layer 213. (See reference...) Figure 6 A filter element with medium-sized circular holes is installed on the second layer 214 of the support rod 21, see reference. Figure 7 A filter element with small circular holes is installed on the third layer 215 of the support rod 21, see reference. Figure 8 The filter element with the smallest circular hole is installed at the end of the support rod 21, which is the fourth layer 216.

[0071] It should be noted that, for reference Figure 4 and Figure 8 The filter body includes a circular filter body and an annular filter body 29. The circular filter body has a circle 24 in the center that engages with the fastening groove of the support rod 21, while the periphery of the circular filter body has multiple first mortises 25. (See reference...) Figure 5 The annular filter body 29 is provided with a second mortise 294 and a second tenon 292.

[0072] When the diameter of the cable protection tube 1 matches the diameter of the circular filter body plus the thickness of the cover 22, there is no need to add an annular filter body 29 to the circular filter body. When the diameter of the cable protection tube 1 is larger than the combined diameter of the circular filter body and the cover 22, an annular filter body 29 needs to be added around the circular filter body. The second tenon 292 on the annular filter body 29 is engaged with the first mortise 25 on the circular filter body to form a mortise and tenon structure. One side of the annular filter body 29 is provided with a first protrusion 293, and the other side is provided with a first groove 291. Adjacent annular filter bodies 29 are engaged with each other's first protrusion 293 and first groove 291, so that annular filter bodies 29 are added around the perimeter of the circular filter body to increase the diameter of the corresponding filter bodies in each layer. If the combined diameter of the circular filter and the annular filter 29 is still insufficient to fit the cable protection tube 1, then another annular filter 29 is added until the diameter of the circular filter and the added annular filter 29 matches the diameter of the current protection tube.

[0073] Specifically, the size of the circular holes on the annular filter element 29 added to each layer of circular filter elements must be consistent with the size of the circular holes on the corresponding circular filter element, so as to... Figure 5 For example, the circular holes on the annular filter body 29 added to a filter body with large circular holes must be the same as the large circular holes, and so on. Similarly, the circular holes on the annular filter body 29 added to a filter body with medium circular holes must be the same as the medium circular holes.

[0074] It should be noted that after the annular filter body 29 is added, the second mortise 294 of the annular filter body 29 engages with the first tenon 223 on the cover body 22.

[0075] Specifically, both the first mortise 25 and the second mortise 294 are mortises. The first mortise 25 is a mortise opened on the circular filter body, and the second mortise 294 is a mortise opened on the annular filter body 29. The second tenon 292 is a tenon provided on the inner side of the annular filter body 29. The first protrusion 293 and the first groove 291 are the protrusion and groove provided on the annular filter body 29, respectively.

[0076] It should be noted that the sand and gravel filtration section of this device consists of a filter body with large circular holes, a filter body with medium circular holes, a filter body with small circular holes, and a filter body with the smallest circular holes. When this device moves, it filters out sand and gravel of different diameters in sequence. The sand and gravel enter the device through the filter body with large circular holes. The large-diameter sand and gravel are large and remain in the first layer 213 of this device. They cannot pass through the filter body with medium circular holes to enter the second layer 214 of this device. The medium-diameter sand and gravel enter the second layer 214 of the device through the filter bodies with large circular holes and the filter bodies with medium circular holes and remain in the second layer 214 of the device. However, they cannot pass through the filter body with small circular holes to enter the third layer 215 of the device. Small-diameter sand and gravel enter the third layer 215 of the device through filter bodies with large circular holes, medium-sized circular holes, and small circular holes, and remain in the third layer 215. The sand and gravel cannot leave the device through the filter body with the smallest circular hole; instead, they remain in the device and are carried out of the cable protection pipe 1 by the device. Because the filter body with the smallest circular hole is only used to allow air to flow out, it avoids air compression within the device, effectively reducing the device's resistance.

[0077] It is worth mentioning that the sand and gravel filtration section of this device consists of filter bodies with large circular holes, filter bodies with medium circular holes, filter bodies with small circular holes, and filter bodies with the smallest circular holes. This allows sand and gravel of different diameters to be distributed in the first layer 213, the second layer 214, and the third layer 215 of the device, resulting in uniform stress on the device and stable dragging within the cable protection pipe 1.

[0078] It is worth mentioning that the sand and gravel filtration section of this device consists of filter bodies with large circular holes, filter bodies with medium circular holes, filter bodies with small circular holes, and filter bodies with the smallest circular holes. The circular holes of different diameters allow air to pass through, reducing the resistance encountered by the device during its dragging in the cable protection pipe 1, ensuring that the device is smoothly dragged from the cable protection pipe 1 to the end and completes the sand and gravel cleaning operation.

[0079] Please see Figure 9-13 , Figure 9 This is a schematic diagram of the moving parts of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention.

[0080] This invention provides a cable protection pipe sand and gravel cleaning device, the cover 22 comprising multiple sequentially connected movable parts 221; each movable part 221 is provided with multiple first tenons 223, second protrusions 222, and second grooves 224; the second protrusion 222 of the previous movable part 221 and the second groove 224 of the next movable part 221 are engaged; the first tenons 223 are engaged with first mortises 25 or second mortises 294. All movable parts 221 are assembled to form a cylindrical cover 22. The inner sidewall of the movable part 221 is provided with a conical groove 225. The inner sidewall of the movable part 221 is set as a rough sidewall, and the outer sidewall is set as a smooth sidewall.

[0081] It should be noted that each movable part 221 is a ring-shaped plate. Multiple first tenons 223 are provided on the inner side wall of each movable part 221. A second protrusion 222 is provided on one side of the movable part 221, and a second groove 224 is provided on the other side. Each movable part 221 is sequentially snapped together to form a cylindrical cover 22. The first tenons 223 on the inner side wall of each movable part 221 also need to be connected to the mortises (such as the first mortis 25 or the second mortis 294) on the filter body to form an integrated cable protection pipe sand and gravel cleaning device 2.

[0082] Specifically, see Figure 11 The outer wall of the movable part 221 is in direct contact with the inner wall of the cable protection pipe 1. The inner wall of the pipe is smooth and burr-free. Therefore, in order to ensure that the device will not damage the inner wall of the cable protection pipe 1 during movement, the outer wall of the movable part 221 needs to be set as a smooth sidewall. The smooth surface ensures that the device can move stably in the cable protection pipe 1, effectively reducing friction.

[0083] Referring to 9-10, the inner wall of the movable part 221 needs to be in direct contact with the sand and gravel. Therefore, the inner wall of the movable part 221 is set as a rough sidewall with a conical groove 225. The rough sidewall can increase the friction with the sand and gravel, reduce the movement of the sand and gravel in the device, and allow the sand and gravel to be stuck in the conical groove 225, so that the device can carry all the sand and gravel out of the cable protection pipe 1, thereby achieving the purpose of thoroughly cleaning the cable protection pipe 1.

[0084] It should be noted that, for reference Figure 9 The second protrusion 222 and the second groove 224 are respectively the protrusion and groove provided on the movable component 221. The number of protrusions or grooves on each movable component 221 includes, but is not limited to, 3, which can be set according to the actual situation. The number of tenons on the movable component 221 is determined by the number of layers of the support rod 21. Each layer of the support rod 21 is equipped with a filter body, and the filter bodies of each layer are connected to the movable component 221.

[0085] It is worth mentioning that, see Figure 12-13 The cover 22 is assembled from multiple movable parts 221. Operators can select the number of movable parts 221 of the cover 22 according to the diameter of each filter body, so that cylindrical covers 22 of different diameters can be assembled.

[0086] Please see Figure 2-3 , Figure 3 This is a structural schematic diagram of the load-bearing rod of a cable protection pipe sand and gravel cleaning device provided in an embodiment of the present invention.

[0087] The present invention provides a sand and gravel cleaning device for cable protection pipes, wherein a ring 212 is provided at the top of the support rod 21. It also includes a pull wire; one end of the pull wire is installed on the ring 212, and the other end extends to the outside of the end of the cable protection pipe 1.

[0088] It should be noted that, for reference Figure 3 The top of the support rod 21 is equipped with a ring 212, on which a pull wire is mounted. One end of the pull wire is connected to the ring 212, and the other end extends to the outside of the cable protection pipe 1. Cleaning personnel pull the wire, thereby moving the device inside the cable protection pipe 1 to remove sand and gravel. The ring 212 and the rod body 211 of the support rod 21 are a single unit, ensuring even stress distribution and preventing breakage.

[0089] The device used in this invention allows for free cleaning inside the cable protection conduit 1 by moving a pull cord. Operators only need to pull the cord to complete the cleaning operation, which is simple, convenient, and improves operability and cleaning efficiency.

[0090] Please see Figure 1-14 , Figure 14 This is a flowchart illustrating the steps of using a cable protection pipe sand and gravel cleaning device applied to any of the above embodiments, as provided in an embodiment of the present invention.

[0091] The present invention provides a method for using a sand and gravel cleaning device for cable protection pipes, comprising the following steps:

[0092] Step 101: Securely connect the pull wire to the ring 212 of the support rod 21;

[0093] Step 102: Install each filter element on the support rod 21 from top to bottom according to the preset circular hole diameter;

[0094] Step 103: Connect each of the first tenons 223 on the cover 22 to the mortises on the filter body to form an integrated cable protection pipe sand and gravel cleaning device 2;

[0095] Step 104: Place the cable protection pipe sand and gravel cleaning device 2 inside the first end of the cable protection pipe 1;

[0096] Step 105: Pull the cable protection pipe sand and gravel cleaning device 2 to the end of the cable protection pipe 1 by pulling the cable and clean the sand and gravel in the cable protection pipe 1.

[0097] It should be noted that the installation device is as follows: one end of the pull wire is fixedly connected to the ring 212 of the support rod 21. The filter bodies are arranged in descending order of the diameter of the circular holes. The filter bodies with large circular holes are installed in the first layer 213 of the support rod 21, followed by the filter bodies with medium circular holes in the second layer 214, the filter bodies with small circular holes in the third layer 215, and the filter bodies with the smallest circular holes in the fourth layer 216. The first tenons 223 of each movable part 221 of the cover 22 are then engaged with the mortises on each filter body to form a mortise and tenon structure, thus forming an integrated cable protection pipe sand and gravel cleaning device 2.

[0098] For usage instructions, please refer to [link / reference]. Figure 1 The cable protection pipe sand and gravel cleaning device 2 is placed inside the first end of the cable protection pipe 1. Cleaning personnel pull the cable, causing the device 2 to move from the first end of the cable protection pipe 1. During this movement, sand and gravel sequentially pass through filters with large, medium, and small circular holes, entering different positions within the device and being carried out of the cable protection pipe 1. During the device's movement, airflow smoothly passes through the large, medium, small, and smallest circular holes in the filters. The filter with the smallest circular hole is only used to allow airflow, reducing device resistance; sand and gravel cannot leave the device through this filter, thus ensuring the device is smoothly moved from the cable protection pipe 1 to the end, completing the sand and gravel cleaning operation.

[0099] This method has the following advantages:

[0100] 1. This invention employs a four-layer filter system with progressively smaller diameters to form the sand and gravel filtration section of the device, with each layer containing a filter element of a different pore size. This design allows for layer-by-layer filtration of sand and gravel, ensuring effective cleaning and preventing larger pieces of sand and gravel from clogging the device.

[0101] 2. The present invention utilizes a mortise and tenon structure design for the movable part 221 of the filter body and cover 22, which enables the adjustment of the cleaning device radius, allowing the cable protection pipe sand and gravel cleaning device 2 to adapt to cable protection pipes 1 of different radii, thereby improving the flexibility and applicability of the cleaning process.

[0102] 3. The device used in this invention allows for free cleaning inside the cable protection pipe 1 by moving the pull wire. Operators only need to pull the wire to complete the cleaning operation, which is simple, convenient, and improves operability and cleaning efficiency.

[0103] 4. The cover 22 of the device used in this invention is composed of multiple movable parts 221, which can be spliced ​​onto the circular filter body. The cylindrical cover 22 is designed to collect the filtered sand and gravel, which facilitates cleaning and processing and improves the effectiveness and thoroughness of cleaning.

[0104] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0105] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for cleaning sand and gravel from cable protection pipes, characterized in that, The cable protection pipe gravel cleaning device includes a support rod, a filter body, and a cover. The support rod is provided with multiple fastening grooves that fit the circles of the filter body; Multiple filter elements are arranged from top to bottom and are respectively connected to the support rod through the fastening groove; The plurality of filter elements are respectively a first filter element, a second filter element, a third filter element, and a fourth filter element; The first filter body has multiple first circular holes; The second filter body has multiple second circular holes; The third filter body has multiple third circular holes; The fourth filter body has multiple fourth circular holes; The filter body includes a circular filter body and an annular filter body, and the mortise on the filter body includes a first mortise and a second mortise. The circular filter body has multiple first mortises; The annular filter body is provided with a second mortise, a second tenon, a first protrusion, and a first groove, respectively. Two adjacent annular filter bodies are connected by the first protrusion and the first groove; The second tenon engages with the first mortise; The cover is provided with a first tenon that matches the mortise on the filter body; The cover includes multiple movable parts connected in sequence; Each of the aforementioned movable parts is provided with multiple first tenons, second protrusions, and second grooves; The second protrusion of the previous movable component and the second groove of the next movable component engage; The first tenon and the first mortise or the second mortise are engaged to form a mortise and tenon structure; The filter body is connected to the cover body via the mortise and tenon structure.

2. The cable protection pipe sand and gravel cleaning device according to claim 1, characterized in that, All the moving parts are assembled to form a cylindrical cover.

3. The cable protection pipe sand and gravel cleaning device according to claim 2, characterized in that, A tapered groove is provided on the inner wall of the movable part.

4. The cable protection pipe sand and gravel cleaning device according to claim 3, characterized in that, The inner wall of the moving part is made into a rough sidewall, and the outer wall is made into a smooth sidewall.

5. The cable protection pipe sand and gravel cleaning device according to claim 1, characterized in that, A ring is provided at the top of the load-bearing rod.

6. The cable protection pipe sand and gravel cleaning device according to claim 5, characterized in that, It also includes the pull cord; One end of the pull wire is mounted on the ring, and the other end extends to the end of the cable protection pipe.

7. A method of using the sand and gravel cleaning device for cable protection pipes according to any one of claims 1 to 6, characterized in that, include: Secure the guy wire to the ring on the support rod. Install each filter element on the support rod from top to bottom according to the preset circular hole diameter; The first tenons on the cover are respectively engaged with the mortises on the filter body to form an integrated cable protection pipe sand and gravel cleaning device; The sand and gravel cleaning device for the cable protection pipe is placed inside the first end of the cable protection pipe; The cable protection pipe sand and gravel cleaning device is pulled to the end of the cable protection pipe by the pull line, and the sand and gravel inside the cable protection pipe are cleaned.

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