Compression-resistant and corrosion-resistant buried cable protection pipe

Abstract

The invention discloses an anti-compression and anti-corrosion buried cable protection pipe which comprises a lower semicircular pipe and an upper semicircular pipe located above the lower semicircular pipe, the radius of the lower semicircular pipe is the same as that of the upper semicircular pipe, the two sides of the upper semicircular pipe are each fixedly connected with a row of lower eight pipes, the two sides of the upper semicircular pipe are each fixedly connected with a row of upper eight pipes, and the lower eight pipes and the upper eight pipes are arranged in parallel. The upper eight pipes correspond to the lower eight pipes in a one-to-one mode, and bolts and supporting springs located below the bolts are arranged in two lower inclined pipes of each lower eight pipe in a sleeved mode. A row of lower eight pipes and a row of upper eight pipes are fixedly arranged on the two sides of the lower semicircular pipe and the two sides of the upper semicircular pipe respectively, then bolts and supporting springs are arranged in the lower eight pipes, and sealing rubber strips are arranged between the lower semicircular pipe and the upper semicircular pipe, so that the lower semicircular pipe and the upper semicircular pipe are fastened and locked by the bolts which are obliquely distributed after being buckled; under the effect of ensuring sealing and corrosion prevention, the combination operation of the complete circular pipe formed by combining the lower semicircular pipe and the upper semicircular pipe is more convenient, and the labor intensity of the combination operation is reduced.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe technology, and in particular to a pressure-resistant and corrosion-resistant buried cable protection pipe. Background Technology

[0002] Underground cable protection pipes are used to provide physical and chemical protection for cables. Physical protection prevents cables from being crushed, while chemical protection prevents corrosion. Currently, cable protection pipes are mostly made of polymer materials and metal materials, with polymer materials being the most common. In some application scenarios, buried cables are subjected to significant compressive forces in certain areas. Ordinary cable protection pipes are unable to reliably protect the cables passing through under such compressive forces. Specifically, ordinary cable protection pipes are prone to deformation and damage under such pressure.

[0003] Currently, to address the issue of localized pressure resistance and corrosion protection for cables, a large number of cable protection pipes with pressure resistance and corrosion resistance functions have appeared on the market. These pipes have relatively complex structures, and to improve installation convenience, they are usually designed as separate units. Assembly typically involves numerous bolt connections, which are time-consuming and labor-intensive due to the extensive bolt tightening operations. Some cable protection pipes on the market also use a hinged connection between the upper and lower semi-circular pipes. However, this hinged structure reduces the corrosion resistance and pressure resistance of the combined upper and lower semi-circular pipes.

[0004] Therefore, this invention proposes a pressure-resistant and corrosion-resistant buried cable protection pipe. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure-resistant and corrosion-resistant buried cable protection pipe to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A pressure-resistant and corrosion-resistant buried cable protection pipe includes a lower semicircular pipe and an upper semicircular pipe located above the lower semicircular pipe. The lower and upper semicircular pipes have the same radius. A row of lower octagonal pipes is fixedly connected to both sides of the upper semicircular pipe, and a row of upper octagonal pipes is fixedly connected to both sides of the upper semicircular pipe. The upper and lower octagonal pipes correspond one-to-one. Each of the two lower inclined tubes of the lower octagonal pipes is fitted with a pin and a support spring located below the pin. The pin is inserted into and adapted to the upper inclined tube on the upper octagonal pipe. A base plate is provided below the lower semicircular pipe, and the top wall of the base plate is fixedly connected to the bottom end of the lower inclined tube. A top plate is provided above the upper semi-circular tube. The bottom wall of the top plate is fixedly connected to the top of the upper inclined tube. A lower pile located inside the lower eight tube is fixedly connected to the top wall of the base plate. An upper pile located inside the upper eight tube is fixedly connected to the bottom wall of the top plate. The bottom of the upper pile and the top of the lower pile are inserted into each other. A detachable sliding sleeve is fitted on the lower pile. A baffle near the top is fixedly fitted on the outside of the lower pile. The outer walls of the two lower inclined tubes of the lower eight tube are detachably connected to connecting shafts. The two sides of the sliding sleeve are respectively hinged to one end of the adjacent connecting shaft through elastic telescopic support rods.

[0007] As a further description of the above technical solution: A sealing groove is provided on the upper end face of the lower semicircular tube, and a sealing strip is provided in the sealing groove. An insert that is compatible with the sealing groove is fixedly connected to the lower end face of the upper semicircular tube.

[0008] As a further description of the above technical solution: The outer wall of the pin has a socket near the bottom that is connected to the connecting shaft. The outer wall of the inclined tube has a clearance notch through which the connecting shaft passes. The inclined tube has a sealing ring embedded near the top. The cross-section of the sliding sleeve is C-shaped.

[0009] As a further description of the above technical solution: The bottom wall of the baffle is fixedly connected to guide shafts located on both sides of the lower pile. The two sides of the sliding sleeve are fixedly connected to an arm with one end hinged to an elastic telescopic support rod. The arm has a guide hole for insertion and connection with the guide shaft.

[0010] As a further description of the above technical solution: It also includes a portal-shaped insert rod, with a U-shaped connecting plate fixedly connected to the outer wall of the sliding sleeve. The outer peripheral walls of the two uprights of the portal-shaped insert rod are provided with annular grooves near the bottom end that are compatible with the U-shaped connecting plate. The top plate is provided with a through hole on the side of the upper pile that is compatible with the upright.

[0011] As a further description of the above technical solution: It also includes arc-shaped plates arranged on both sides of the lower semi-circular tube. One side of the baffle is fixedly connected to the outer wall of the lower semi-circular tube, the inner side wall of the arc-shaped plate is in contact with the outer wall of the lower semi-circular tube, a groove is provided at the top of the arc-shaped plate, an arc-shaped guide rod is fixedly connected to the bottom of the groove, and an arc-shaped guide sleeve is fixedly connected to the baffle and sleeved outside the arc-shaped guide rod.

[0012] As a further description of the above technical solution: The base plate and the top plate each have a row of lower flow windows and an upper flow window respectively.

[0013] As a further description of the above technical solution: The top of the lower pile is fixedly connected to a plug, and the bottom of the upper pile is provided with a mating hole that is compatible with the plug.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, a row of lower eight tubes and an upper eight tube are fixedly installed on both sides of the lower and upper semicircular tubes, respectively. Then, a pin and a support spring are installed in the lower eight tubes, and a sealing strip is installed between the lower and upper semicircular tubes. This allows the lower and upper semicircular tubes to be fastened and locked by the inclined pins after being connected. While ensuring sealing and corrosion prevention, the combination operation of the complete circular tube formed by the lower and upper semicircular tubes is more convenient and reduces the labor intensity of the combination operation.

[0015] 2. In this invention, by setting a connecting shaft, elastic telescopic strut, sliding sleeve and lower pile, the pin has the function of entering and exiting the inclined tube. This setting can combine and correct the deformed lower and upper semicircular tubes. That is to say, before the lower and upper semicircular tubes are combined, they have a certain length. After the lower and upper semicircular tubes are made separately, they have a certain deformation. By pre-pressurizing and correcting, the lower and upper semicircular tubes can be accurately connected during the later installation, reducing the difficulty of connecting the lower and upper semicircular tubes.

[0016] 3. In this invention, by setting an arc-shaped plate, an arc-shaped guide rod, and a baffle, the lower and upper semi-circular tubes can be pre-compressed during assembly and docking, allowing the pin to be smoothly inserted into the upper inclined tube, making the connection between the pin and the upper inclined tube smoother and more practical. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pressure-resistant and corrosion-resistant buried cable protection pipe proposed in this invention; Figure 2 for Figure 1 A diagram at the bottom; Figure 3This is a schematic diagram of the structure of the pin, support spring, and downward inclined tube of a pressure-resistant and corrosion-resistant buried cable protection pipe proposed in this invention; Figure 4 This is a schematic diagram of the structure of the sliding sleeve, elastic telescopic strut, connecting shaft, pin and lower pile of a pressure-resistant and corrosion-resistant buried cable protection pipe proposed in this invention; Figure 5 This is a schematic diagram of the structure of a pressure-resistant and corrosion-resistant buried cable protection pipe proposed in this invention after the connecting shaft and sliding sleeve are separated from the pin and the lower pile, respectively. Figure 6 This is a schematic diagram of the structure of a pressure-resistant and corrosion-resistant buried cable protection pipe proposed in this invention, in which the pin is not inserted into the upper inclined pipe after the lower and upper semicircular pipes are combined.

[0018] Legend: 1. Lower semicircular tube; 11. Sealing groove; 2. Upper semicircular tube; 21. Insert strip; 3. Lower octagonal tube; 31. Lower inclined tube; 311. Relief notch; 4. Upper octagonal tube; 41. Upper inclined tube; 5. Pin; 51. Insertion hole; 6. Support spring; 7. Base plate; 71. Lower pin; 711. Plug; 72. Lower flow window; 8. Top base plate; 81. Upper pin; 811. Butt hole; 82. Upper flow window; 83. Through hole; 9. 91. Sliding sleeve; 92. U-shaped connecting plate; 93. Arm rod; 94. Guide hole; 15. Connecting shaft; 16. Elastic telescopic support rod; 17. Sealing strip; 18. Sealing ring; 19. Portal-shaped insert rod; 105. Upright rod; 1051. Annular groove; 106. Baffle; 1071. Guide shaft; 1082. Arc-shaped guide sleeve; 107. Arc-shaped plate; 1081. Groove; 10911. Arc-shaped guide rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Please see Figure 1-6 A pressure-resistant and corrosion-resistant buried cable protection pipe includes a lower semicircular pipe 1 and an upper semicircular pipe 2 located above the lower semicircular pipe 1. The lower semicircular pipe 1 and the upper semicircular pipe 2 have the same radius. The lower semicircular pipe 1 and the upper semicircular pipe 2 are combined to form a complete circular pipe. The cable passes through the complete circular pipe. The complete circular pipe provides physical protection (pressure resistance) and chemical protection (corrosion prevention) for the cable.

[0021] In this technical solution, a row of lower octagonal tubes 3 are fixedly connected to both sides of the upper semicircular tube 2. The lower octagonal tubes 3 are formed by two lower inclined tubes 31. A row of upper octagonal tubes 4 are fixedly connected to both sides of the upper semicircular tube 2. The upper octagonal tubes 4 are formed by two upper inclined tubes 41. The upper octagonal tubes 4 and the lower octagonal tubes 3 correspond one-to-one. When the upper semicircular tube 2 and the lower semicircular tube 1 are tightly fitted together, the two lower inclined tubes 31 on the lower octagonal tubes 3 are coaxial with the two upper inclined tubes 41 on the upper octagonal tubes 4. In specific implementation, the included angle between the axes of the two lower inclined tubes 31 on the lower octagonal tubes 3 is in the range of 80° to 90°.

[0022] Each of the two downward-sloping tubes 31 of the lower octagonal tube 3 is fitted with a pin 5 and a support spring 6 located below the pin 5. In specific implementation, the two ends of the support spring 6 are fixedly connected to the bottom end of the pin 5 and the bottom wall of the downward-sloping tube 31, respectively. The function of the support spring 6 is to provide an elastic thrust upward-sloping force to the pin 5. The pin 5 and the downward-sloping tube 31 have a slidable transition fit structure. The pin 5 is inserted into and matched with the upward-sloping tube 41 on the upper octagonal tube 4. The pin 5 and the upward-sloping tube 41 also have a slidable transition fit structure. A base plate 7 is provided below the lower semicircular tube 1. The top wall of the base plate 7 is fixedly connected to the bottom end of the downward-sloping tube 31. A top seat plate 8 is provided above the upper semicircular tube 2. The bottom wall of the top seat plate 8 is fixedly connected to the top end of the upward-sloping tube 41. When buried underground, the base plate 7 contacts the bottom of the pit, and the top seat plate 8 bears the soil or other filling material. The top seat plate 8 shares the load of the complete circular tube mentioned above. Among them, a row of lower flow windows 72 and upper flow windows 82 are respectively opened on the surface of the base plate 7 and the top plate 8. The function of the upper flow windows 82 and the lower flow windows 72 is to allow earth or other filling materials to fill the outer periphery of the lower semicircular pipe 1 and the upper semicircular pipe 2, so as to avoid hollowing.

[0023] The top wall of the base plate 7 is fixedly connected to a lower stake 71 located inside the lower octagon 3. Specifically, the lower stake 71 is located between the two lower inclined tubes 31 of the lower octagon 3. The bottom wall of the top base plate 8 is fixedly connected to an upper stake 81 located inside the upper octagon 4. The upper stake 81 is also located between the two upper inclined tubes 41 of the upper octagon 4. The bottom of the upper stake 81 and the top of the lower stake 71 are inserted into each other. Specifically, the top of the lower stake 71 is fixedly connected to a plug 711, and the bottom of the upper stake 81 is provided with a fitting for insertion of the plug 711. The matching docking hole 811, upper stake 81, and lower stake 71 are used to ensure the alignment of the upper octagonal tube 4 and the lower octagonal tube 3, facilitating the insertion of the pin 5 into the corresponding upper inclined tube 41. A detachable sliding sleeve 9 is fitted on the lower stake 71, and the sliding sleeve 9 and the lower stake 71 are slidably connected. A baffle 106 is fixedly fitted on the outside of the lower stake 71 near the top, and the baffle 106 limits the upward sliding of the sliding sleeve 9. The outer walls of the two lower inclined tubes 31 of the lower octagonal tube 3 are detachably connected to the connecting shaft 101. The sliding sleeve 9 is supported by elastic telescopic struts on both sides. 102 is hinged to one end of the adjacent connecting shaft 101. The elastic telescopic support rod 102 has a two-section telescopic structure with built-in springs. Under normal conditions, the elastic telescopic support rod 102 is in an extended state, where the spring force is greater than the spring force of the aforementioned support spring 6. When the sliding sleeve 9 moves upward to its limit position, the elastic telescopic support rods 102 on both sides form a V-shape with the opening facing downward. At this time, the elastic telescopic support rod 102 will push the pin 5 downward through the connecting shaft 101 until it is submerged in the lower inclined tube 31. In the state of compression, the support spring 6 is in a compressed state. When the sliding sleeve 9 moves downward to the limit position, the elastic telescopic support rods 102 on both sides form an upward-facing V-shape. At this time, the support spring 6 will push the top of the pin 5 to extend out of the top opening of the lower inclined tube 31. The mechanism consisting of the connecting shaft 101, the elastic telescopic support rod 102 and the sliding sleeve 9 is a control mechanism for controlling the top of the pin 5 to extend and enter the lower inclined tube 31. The setting of this control mechanism makes the docking, correction and separation of the lower semicircular tube 1 and the upper semicircular tube 2 more convenient.

[0024] The aforementioned detachable connecting shaft 101 and detachable sliding sleeve 9 in the control mechanism allow the control mechanism to be separated after use, effectively reducing costs. Specifically, the outer wall of the pin 5 has a socket 51 near the bottom that connects to the connecting shaft 101, and the outer wall of the inclined tube 31 has a clearance notch 311, which is rectangular. The connecting shaft 101 passes through the clearance notch 311. A sealing ring 104 is embedded in the inclined tube 31 near the top. In practice, the inner circumferential wall of the inclined tube 31 has an annular groove near the opening, and the sealing ring 104 is located in the annular groove. The inner wall of the sealing ring 104 fits against the outer wall of the pin 5. The function of this sealing ring 104 is to prevent water seepage. It should be noted that after the pin 5 is pulled out, the clearance notch 311 can be filled with sealing material or other rubber seals with waterproof and seepage-proof properties, thereby effectively preventing the support spring 6 from being corroded. Among them, the cross-section of the sliding sleeve 9 is C-shaped, and the sliding sleeve 9 is connected to the lower pile 71 by its own notch.

[0025] Furthermore, the bottom wall of the baffle 106 is fixedly connected to guide shafts 1061 located on both sides of the lower pile 71. There is a gap between the bottom of the guide shaft 1061 and the base plate 7. The two sides of the sliding sleeve 9 are fixedly connected to an arm 92 with one end hinged to the elastic telescopic support rod 102. The arm 92 is provided with a guide hole 921 that is inserted into the guide shaft 1061. When the sliding sleeve 9 slides down to the limit position, it can separate from the guide hole 921. The function of the guide shaft 1061 is to ensure that the sliding sleeve 9 can slide stably up and down along the lower pile 71.

[0026] In this embodiment, a portal-shaped insert rod 105 is also included. One protective tube corresponds to one portal-shaped insert rod 105. The two uprights 1051 on the portal-shaped insert rod 105 have a certain degree of bendability. A U-shaped connecting plate 91 is fixedly connected to the outer wall of the sliding sleeve 9. The outer peripheral walls of the two uprights 1051 of the portal-shaped insert rod 105 have annular grooves 10511 near the bottom end that are adapted to be inserted into the U-shaped connecting plate 91. The annular grooves 10511 and the inner groove of the U-shaped connecting plate 91 can be fastened together. This fastening structure allows the uprights 1051 to leave the U-shaped connecting plate 91 when they bend outward. A through hole 83 is opened on the surface of the top plate 8, located on one side of the upper pile 81 and adapted to be inserted into the uprights 1051. The through hole 83 also extends along the entire complete... The circular tubes are arranged in opposite directions along their axes, meaning that one set of upper eight tubes 4 corresponds to two through holes 83. After the upright rod 1051 slides up to a certain distance, it can disengage from the through hole 83. The gate-shaped plug rod 105 is inserted into the through hole 83. When the gate-shaped plug rod 105 is pulled up and down, it can drive the sliding sleeve 9 to move up and down through the U-shaped connecting plate 91. This setting allows the pins 5 in the lower eight tubes 3 on both sides of the lower semi-circular tube 1 to be pushed simultaneously, making the insertion of the pins 5 and the upper inclined tube 41 smoother. After the gate-shaped plug rod 105 is switched, it can indirectly control the movement of the pins 5 in the lower inclined tubes 31 of other lower eight tubes 3. This setting can improve the control of the sliding of multiple pins 5, making it more time-saving, labor-saving, and convenient. The gate-shaped plug rod 105 can be removed directly after use.

[0027] This technical solution also includes arc-shaped plates 107 arranged on both sides of the lower semicircular tube 1. One side of the baffle 106 is fixedly connected to the outer wall of the lower semicircular tube 1, and the inner sidewall of the arc-shaped plate 107 is in contact with the outer wall of the lower semicircular tube 1. One baffle 106 corresponds to one arc-shaped plate 107. A groove 1071 is formed at the top of the arc-shaped plate 107, and an arc-shaped guide rod 10711 is fixedly connected to the bottom of the groove 1071. A sleeve on the arc-shaped guide rod 10711 is fixedly connected to the baffle 106. The arc-shaped guide sleeve 1062 guides the arc plate 107 to slide circumferentially along the outer wall of the lower semi-circular tube 1. When the upper semi-circular tube 2 and the lower semi-circular tube 1 are engaged, the arc plate 107 slides up to the limit position, and the inner arc wall of the arc plate 107 simultaneously fits against the outer walls of the upper semi-circular tube 2 and the lower semi-circular tube 1. This arrangement makes the upper semi-circular tube 2 and the lower semi-circular tube 1 fit more closely when they are joined, and can effectively prevent the upper semi-circular tube 2 and the lower semi-circular tube 1 from excessive deformation leading to alignment difficulties.

[0028] A sealing groove 11 is formed on the upper end face of the lower semicircular tube 1. The sealing groove 11 is a through groove, and a sealing strip 103 is installed inside the sealing groove 11. An insert 21 that is compatible with the sealing groove 11 is fixedly connected to the lower end face of the upper semicircular tube 2. When the lower semicircular tube 1 and the upper semicircular tube 2 are joined, the insert 21 will be inserted into the sealing groove 11 and simultaneously squeeze the sealing strip 103. At this time, the entire circular tube formed by the lower semicircular tube 1 and the upper semicircular tube 2 is in a moisture-proof and corrosion-proof state. It should be noted that when the protective tube is made of polymer material, the lower semicircular tube 1 and the structure connected to it, as well as the upper semicircular tube 2 and the structure above it, are integrally injection molded. When the protective tube is made of metal, a polyurethane anti-corrosion layer needs to be sprayed onto the surface of the protective tube. This achieves the corrosion resistance of the protective tube.

[0029] Working principle: Before use, place the lower semicircular tube 1 in the pit required for burying the cable, with the base plate 7 in contact with the bottom of the pit. Then, place the cable inside the lower semicircular tube 1, and place the upper semicircular tube 2 on top of the lower semicircular tube 1. Then, insert the plug 711 into the mating hole 811, and simultaneously insert the insert 21 into the sealing groove 11. At this time, due to the deformation of the lower semicircular tube 1 and the upper semicircular tube 2, the insert 21 and the sealing groove 11 are not completely inserted. Then, manually press the top of the lower semicircular tube 1 near the arc plate 107, so that the insert 21 corresponding to the pressed part and the sealing groove 11 are fully inserted. With the sealing groove 11 fully inserted, the corresponding sealing strip 103 is compressed by the insert strip 21. Then, manually push the arc plates 107 on both sides of the pressing area upward. When the arc plates 107 move to their limit position, the upper semicircular tube 2 is limited and its upward deformation is eliminated. In this way, push the arc plates 107 of other parts upward. After all the arc plates 107 are pushed upward, the lower semicircular tube 1 and the upper semicircular tube 2 are in a fully fitted state. At this time, take a door-shaped insert rod 105 and place the two uprights 1051 on the door-shaped insert rod 105 from above the top plate 8. Passing through two of the through holes 83, and then manually bending the upright 1051 so that the annular groove 10511 and the adjacent U-shaped connecting plate 91 are fastened, then manually pressing down on the gate-shaped insert 105, at which point the sliding sleeve 9 will push the opposite ends of the elastic telescopic support rods 102 on both sides of it downward. When the elastic telescopic support rods 102 on both sides of the sliding sleeve 9 are approximately collinear, the support spring 6 will extend and push the pin 5 inserted into the lower inclined tube 31 upward. The top of the pin 5 enters the upper inclined tube 41 and abuts against the top of the upper inclined tube 41. At this time, the pin 5 uses the figure-eight structure to connect the lower semicircular tube 1 and the upper... The semicircular tube 2 is locked. In this way, the gate-shaped insert rod 105 is pressed against the other sliding sleeves 9 to lock the lower semicircular tube 1 and the upper semicircular tube 2. After locking, when the sliding sleeve 9 descends to the limit position, the guide hole 921 will disengage from the guide shaft 1061. Therefore, by utilizing the compressibility of the elastic telescopic support rod 102, the connecting shaft 101 can be pulled out of the insert hole 51. Then, the sliding sleeve 9 is peeled off from the lower pile 71. Then, the two ends of the complete circular tube formed by the lower semicircular tube 1 and the upper semicircular tube 2 are welded or heat-fused to the corresponding ordinary pipes (depending on the material selection).

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pressure-resistant and corrosion-resistant buried cable protection pipe, comprising a lower semicircular pipe (1) and an upper semicircular pipe (2) located above the lower semicircular pipe (1), wherein the lower semicircular pipe (1) and the upper semicircular pipe (2) have the same radius, characterized in that, A row of lower eight tubes (3) is fixedly connected to both sides of the upper semicircular tube (2), and a row of upper eight tubes (4) is fixedly connected to both sides of the upper semicircular tube (2). The upper eight tubes (4) and the lower eight tubes (3) correspond one-to-one. A pin (5) and a support spring (6) located below the pin (5) are fitted inside the two lower inclined tubes (31) of the lower eight tubes (3). The pin (5) and the upper inclined tube (41) on the upper eight tubes (4) are inserted and matched. A base plate (7) is provided below the lower semicircular tube (1). The top wall of the base plate (7) is fixedly connected to the bottom end of the lower inclined tube (31). A top seat plate (8) is provided above the upper semicircular tube (2). The bottom wall of the top seat plate (8) and the upper inclined tube ( The top of the base plate (7) is fixedly connected to the bottom wall of the base plate (7), and the bottom wall of the top plate (8) is fixedly connected to the top pile (81) located in the upper pipe (4). The bottom of the upper pile (81) and the top of the lower pile (71) are inserted into each other. A detachable sliding sleeve (9) is fitted on the lower pile (71). A baffle (106) near the top is fixedly fitted on the outside of the lower pile (71). The outer walls of the two lower inclined pipes (31) of the lower pipe (3) are detachably connected to the connecting shaft (101). The two sides of the sliding sleeve (9) are respectively hinged to one end of the adjacent connecting shaft (101) through elastic telescopic support rods (102).

2. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 1, characterized in that, The upper end face of the lower semicircular tube (1) is provided with a sealing groove (11), and a sealing strip (103) is provided in the sealing groove (11). The lower end face of the upper semicircular tube (2) is fixedly connected with an insert (21) that is compatible with the sealing groove (11).

3. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 1, characterized in that, The outer wall of the pin (5) has a socket (51) near the bottom and connected to the connecting shaft (101). The outer wall of the inclined tube (31) has a clearance notch (311). The connecting shaft (101) passes through the clearance notch (311). The inclined tube (31) has a sealing ring (104) near the top. The cross-section of the sliding sleeve (9) is C-shaped.

4. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 3, characterized in that, The bottom wall of the baffle (106) is fixedly connected to the guide shaft (1061) located on both sides of the lower pile (71). The two sides of the sliding sleeve (9) are fixedly connected to the arm (92) with one end hinged to the elastic telescopic support rod (102). The arm (92) is provided with a guide hole (921) that is inserted into the guide shaft (1061).

5. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 1, characterized in that, It also includes a portal-shaped insert rod (105), and a U-shaped connecting plate (91) is fixedly connected to the outer wall of the sliding sleeve (9). The outer peripheral walls of the two uprights (1051) of the portal-shaped insert rod (105) are provided with annular grooves (10511) near the bottom end and adapted to be inserted into the U-shaped connecting plate (91). The top plate (8) is provided with a through hole (83) on the plate surface located on one side of the upper pile (81) and adapted to be inserted into the upright (1051).

6. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 1, characterized in that, It also includes arc-shaped plates (107) arranged on both sides of the lower semicircular tube (1). One side of the baffle (106) is fixedly connected to the outer wall of the lower semicircular tube (1). The inner side wall of the arc-shaped plate (107) is attached to the outer wall of the lower semicircular tube (1). A groove (1071) is provided at the top of the arc-shaped plate (107). An arc-shaped guide rod (10711) is fixedly connected to the bottom of the groove (1071). An arc-shaped guide sleeve (1062) is fixedly connected to the baffle (106) and sleeved on the outside of the arc-shaped guide rod (10711).

7. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 1, characterized in that, The base plate (7) and the top plate (8) have a row of lower flow windows (72) and an upper flow window (82) respectively.

8. The buried cable protection pipe with pressure resistance and corrosion resistance according to claim 1, characterized in that, The top of the lower pile (71) is fixedly connected to a plug (711), and the bottom of the upper pile (81) is provided with a mating hole (811) that is compatible with the plug (711).

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