Transition box and TRD wall forming machine cutter box

Abstract

The invention discloses a transition box and a TRD wall forming machine cutter box, and belongs to the technical field of underground diaphragm wall forming machines. The transition box comprises a box body defined by an upper sealing plate, a lower sealing plate, end plates at the two ends and side plates on the two sides. Wherein the width size of the upper sealing plate is larger than that of the lower sealing plate, a plurality of butt joint holes with different functions are formed in the upper sealing plate and the lower sealing plate, and the arrangement positions of the butt joint holes in the upper sealing plate and the lower sealing plate are different; and a preset pipeline for communicating the butt joint holes with the same function in the upper sealing plate and the lower sealing plate in a butt joint manner is arranged in the box body. The butt joint holes with different functions are formed in the upper sealing plate and the lower sealing plate of the transition box, the butt joint holes are matched with the preset pipeline to achieve vertical conduction of the functional pipeline, and the matching problem between the knife boxes of different models and sizes and the TRD wall forming machine is solved. The guide wheel assembly in the cutter box adopts a self-adjusting lubricating system, so that slurry is prevented from entering the guide wheel assembly under the high-pressure working condition, and the safety and efficiency of construction are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of TRD chain knife type underground continuous wall building machines, and in particular to a transition box and a knife box of a TRD wall building machine. Background Art

[0002] The existing TRD method involves inserting a cutting box equipped with a cutting chain and a cutter head that meets the designed depth into the ground using a TRD chain-knife underground continuous wall machine. While performing longitudinal cutting and horizontal trenching, the chain drives the cutter to rotate up and down, and then injects cement slurry into the foundation to achieve a thorough mixing with the original foundation, forming a continuous wall of uniform thickness underground. This construction process, also known as the "mixed-mix wall underground continuous wall construction method," allows for continuous wall construction in various soil and gravel layers. Its main features are continuous wall formation, a smooth surface, uniform thickness, and good wall uniformity. It is primarily used in various construction projects, underground projects, bank protection projects, foundation reinforcement for dams and embankments, and anti-seepage treatment.

[0003] In the existing technology, the box body of the TRD wall-building machine tool box often uses a 400mm tool box, but such a thick size may not be used in the actual construction process. When connecting tool boxes of different models and sizes, the adaptability is poor, and the connection between the width of the tool box and the functional hole cannot be completed. It is necessary to design a transition connection part to adapt to tool boxes of different models and sizes. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the present invention provides a transition box and a TRD wall-building machine tool box.

[0005] The present invention adopts the following technical solution: a transition box, comprising a box body enclosed by an upper sealing plate, a lower sealing plate, end plates at both ends and side plates on both sides; Among them, the width of the upper sealing plate is larger than that of the lower sealing plate, and a plurality of docking holes with different functions are provided on the upper sealing plate and the lower sealing plate, and the arrangement positions of the docking holes on the upper sealing plate and the lower sealing plate are different; the box body is provided with a preset pipeline for connecting the docking holes with the same functions on the upper sealing plate and the lower sealing plate.

[0006] Preferably, one end of the box body close to the lower sealing plate is a docking structure; The docking structure includes a transverse rib plate arranged parallel to the upper sealing plate and the lower sealing plate; the two ends of the transverse rib plate are fixedly connected to the end plates at both ends, dividing the box into a lower cavity and an upper cavity; The side panels include a lower side panel sealed on the outside of the lower cavity and an upper side panel sealed on the outside of the upper cavity; the lower side panel is a structure with a convex middle and concave ends, and a concave portion is formed between the end of the lower side panel and the end panel, the lower sealing panel and the transverse rib plate; The recessed portion is provided with a longitudinal short rib plate with both ends fixedly connected to the lower sealing plate and the transverse rib plate, and a transverse connecting hole is opened on the longitudinal short rib plate; Positioning pin holes are respectively opened at both ends of the lower sealing plate, and longitudinal connecting holes are opened on the lower sealing plate on both sides of the positioning pin holes, and the longitudinal connecting holes are opposite to the recessed parts.

[0007] Preferably: a longitudinal long rib plate is arranged in parallel between the two end plates; the two ends of the longitudinal long rib plate are fixedly connected to the upper sealing plate and the lower sealing plate respectively, the middle part of the longitudinal long rib plate intersects with the middle part of the transverse rib plate, and the longitudinal long rib plate and the transverse rib plate are provided with through grooves for the preset pipeline to pass through.

[0008] Preferably, the docking hole on the upper sealing plate includes a slurry pipe hole opened in the middle of the upper sealing plate, a lubricating oil pipe hole is opened at one end of the upper sealing plate, and a square tube hole for placing an inclinometer is opened at the other end of the upper sealing plate; The docking holes on the lower sealing plate include a lubricating oil pipe hole opened in the middle of the upper sealing plate, and square tube holes and square tube auxiliary holes for placing inclinometers are opened on the lower sealing plate on both sides of the lubricating oil pipe hole; slurry pipe holes and slurry pipe auxiliary holes are opened at both ends of the lower sealing plate.

[0009] A TRD wall forming machine tool box, comprising: The middle box has a docking structure at the upper and lower ends; the upper end of the middle box is docked on the lower sealing plate of the transition box; The head support box has a docking structure at its upper end; the upper end of the head support box docks with the lower end of the middle box; a guide wheel assembly, fixedly connected to the lower end of the head support box; Among them, an electric lubrication pump assembly is installed on the head support box, and the electric lubrication pump assembly provides lubricating oil to the guide wheel assembly through an oil pipe; a pressure sensor for detecting external pressure is installed on the side wall of the guide wheel assembly, and the pressure of the lubricating oil provided by the electric lubrication pump assembly is greater than the external pressure detected by the pressure sensor.

[0010] Preferably, a plurality of axially opposite docking holes with different functions are provided at both ends of the intermediate box, and the two ends of the intermediate box are connected to each other via a preset pipeline laid in the intermediate box.

[0011] Preferably: the upper end of the head support box is provided with a docking hole that matches the lower end of the middle box; The lower ends of both sides of the head support box have inward-inclined folding edges, and mud holes are opened on the sides and folding edges of the head support box. The mud holes are connected to the corresponding docking holes at the upper end of the head support box through preset pipelines laid in the head support box.

[0012] Preferably, the lower end of the head support box has a concave arc-shaped sealing plate, and the upper part of the guide wheel in the guide wheel assembly extends into the arc-shaped sealing plate.

[0013] Preferably, the guide wheel assembly includes: A guide wheel with a center hole in the middle; A rotating shaft is inserted into the center hole of the guide wheel; a bearing is installed between the rotating shaft and the guide wheel; A pair of side support plates are arranged on both sides of the guide wheel and are used to dock with the lower end of the head support box; a center hole is opened in the middle of the side support plate, and the two ends of the rotating shaft are positioned in the center hole of the side support plate on the corresponding side; dynamic sealing is achieved between the outer peripheral side of the guide wheel and the side support plate through a dynamic seal.

[0014] Preferably, one end of the rotating shaft is positioned with the side support plate on one side through a step on the rotating shaft, and the other end of the rotating shaft is fixed with a positioning plate pressed against the side support plate on the other side; End caps for sealing both ends of the rotating shaft are fixed to the outside of the side support plates; the pressure sensor for detecting external pressure is installed on the inner wall of at least one of the end caps; The side support plate is provided with an oil hole connected to the dynamic seal on the corresponding side, and the lubricating oil in the dynamic seal is connected to the bearing through the gap between the side support plate and the guide wheel.

[0015] The beneficial effects of the present invention are: The upper and lower cover plates of the transition box are provided with docking holes with different functions. Together with the preset pipelines, they realize the upper and lower conduction of functional pipelines, solving the adaptation problem between different models and sizes of cutter boxes and TRD wall-building machines. The docking structure adopts a combination of longitudinal and transverse ribs and special-shaped side panels, which facilitates the installation of preset pipelines, enhances the connection strength of the box body, and ensures smooth construction. An electric lubrication pump assembly is set up to perform self-adjustment according to the feedback information of the pressure sensor; at the beginning and end of the operation, the pressure sensor can realize real-time monitoring of the external mud pressure, and the electric lubrication pump assembly can automatically adjust the lubricating oil pressure according to the information, ensuring that the lubricating oil pressure is always greater than the external pressure, avoiding mud from entering the guide wheel assembly under high-pressure conditions, and ensuring the safety and efficiency of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a first-perspective stereoscopic view of a transition box of the present invention.

[0018] Figure 2 for Figure 1 Middle main view.

[0019] Figure 3 for Figure 2 Middle AA section view.

[0020] Figure 4 This is a second perspective stereoscopic view of a transition box of the present invention (the front side panel is hidden in the figure).

[0021] Figure 5 for Figure 4 Middle main view.

[0022] Figure 6 This is a top view of a TRD wall-building machine tool box according to the present invention (the front side panel is hidden in the figure).

[0023] Figure 7 for Figure 6 Enlarged view of the middle box.

[0024] Figure 8 This is a three-dimensional diagram of the middle box.

[0025] Figure 9 for Figure 6 A magnified view of the mid-head support box.

[0026] Figure 10 A three-dimensional diagram of the head support box.

[0027] Figure 11 for Figure 6 Enlarged view of the middle guide wheel assembly.

[0028] Figure 12 A cross-sectional view of the guide wheel assembly.

[0029] Description of reference numerals: 1. Transition box; 101, upper cavity; 102, lower cavity; 1021, recessed portion; 11. Upper sealing plate; 12. Lower sealing plate; 121. Longitudinal connecting hole; 122. Positioning pin hole; 13. End plate; 14. Side plate; 141. Upper side plate; 142. Lower side plate; 15. Pre-set pipeline; 16, docking hole; 161, slurry pipe hole; 1610, slurry pipe auxiliary hole; 162, lubricating oil pipe hole; 163, square tube hole; 1630, square tube auxiliary hole; 17. Transverse ribs; 18. Longitudinal short ribs; 181. Transverse connecting holes; 19. Longitudinal long ribs; 2. Intermediate box; 3. Head support box; 31. Electric lubrication pump assembly; 32. Oil pipe; 33. Folding edge; 34. Mud hole; 35. Arc-shaped sealing plate; 4. Guide wheel assembly; 41. Pressure sensor; 42. Guide wheel; 43. Rotating shaft; 44. Side support plate; 45. Dynamic seal; 46. Positioning plate; 47. End cover; 48. Oil hole; 49. Bearing. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0031] like Figures 1 to 3 As shown, the present invention provides a transition box connected between the TRD wall-building machine and the knife box, which is used to adapt to knife boxes of different models and sizes.

[0032] The transition box consists of an upper cover plate 11, a lower cover plate 12, end plates 13 at each end, and side plates 14 on either side. The plates are welded or bolted together. The upper cover plate 11 is wider than the lower cover plate 12, and the shape of the end plates 13 adapts to the width of the upper and lower cover plates. The upper cover plate 11 at the upper end of the box has a connection hole for secure connection to the TRD wall-building machine. The lower end of the box has a docking structure for connecting to the tool box.

[0033] Combine Figures 1 to 5 As shown, the docking structure includes a transverse rib 17, which is arranged parallel to the upper and lower sealing plates 11, 12. The two ends of the transverse rib 17 are fixedly connected to the end plates 13 at both ends. The transverse rib 17 divides the box into a lower cavity 102 and an upper cavity 101. The portion of the end plate 13 facing the upper cavity 101 is an isosceles trapezoid, and the portion of the end plate 13 facing the lower cavity 102 is a rectangle.

[0034] To accommodate the end plate 13, the side plate 14 includes an upper side plate 141 and a lower side plate 142. The upper side plate 141 is arranged at an angle and blocks the outside of the upper cavity 101. The lower side plate 142 blocks the outside of the lower cavity 102. The lower side plate 142 has a convex middle structure with concave ends. A recessed portion 1021 is formed between the end of the lower side plate 142 and the end plate 13, the lower sealing plate 12, and the transverse rib plate 17. A longitudinal short rib plate 18 is provided in the recessed portion 1021. The ends of the longitudinal short rib plate 18 are fixed to the lower sealing plate 12 and the transverse rib plate 17, respectively. A transverse connecting hole 181 is provided on the longitudinal short rib plate 18.

[0035] A locating pin hole 122 is provided at each end of the lower cover plate 12. These holes are used to position the transition box and the tool box during docking. A row of longitudinal connecting holes 121 are provided on either side of the locating pin hole 122. Each longitudinal connecting hole 121 is aligned with the recessed portion 1021 to facilitate the installation of connecting bolts.

[0036] Combine Figures 1 to 5 As shown, the upper sealing plate 11 and the lower sealing plate 12 are provided with docking holes 16 with different functions and arranged in different positions. The docking holes 16 with the same function on the upper sealing plate 11 and the lower sealing plate 12 are docked through a preset pipeline 15, which is a metal pipe or a rubber hose.

[0037] In this embodiment, a symmetrical slurry pipe hole 161 is opened in the middle of the upper sealing plate 11, a lubricating oil pipe hole 162 is opened at one end of the upper sealing plate 11, and a square tube hole 163 for placing an inclinometer is opened at the other end; in contrast, a lubricating oil pipe hole 162 is opened in the middle of the lower sealing plate 12, a square tube hole 163 is opened on one side of the lubricating oil pipe hole 162, and a square tube auxiliary hole 1630 is opened on the other side; symmetrical slurry pipe holes 161 and slurry pipe auxiliary holes 1610 are respectively opened at both ends of the lower sealing plate 12.

[0038] Longitudinal ribs 19 are arranged parallel to the middle of the two end plates 13. The ends of the longitudinal ribs 19 are fixedly connected to the upper sealing plate 11 and the lower sealing plate 12 respectively. The longitudinal ribs 19 and the transverse ribs 17 are provided with through slots for the preset pipelines 15 to pass through. The middle of the longitudinal ribs 19 and the middle of the transverse ribs 17 also intersect through corresponding through slots. Example

[0039] Based on the above embodiment 1, combined with Figure 6 As shown, the present invention provides a TRD wall-building machine tool box, including a middle box 2, a head support box 3 and a guide wheel assembly 4.

[0040] Combine Figures 6 to 8 As shown, the upper and lower ends of the intermediate box 2 are equipped with docking structures identical to those at the lower end of the transition box 1. The upper end of the intermediate box 2 and the lower end of the transition box 1 are docked together via the docking structure. During use, the intermediate box 2 and the transition box are first positioned using the positioning pin holes 122 and the positioning pins. The corresponding longitudinal connection holes 121 are then bolted together to secure the intermediate box 2 and the transition box 1, thereby achieving a fixed connection and corresponding electrical connection between the intermediate box 2 and the docking holes on the transition box 1. In this embodiment, multiple docking holes 16 with different functions are provided at both ends of the intermediate box 2. The docking holes 16 at both ends are axially opposed and connected to each other via a pre-set pipeline 15, allowing the same functional pipeline to extend downward.

[0041] Recombination Figure 9 and Figure 10 As shown, the upper end of the head support box 3 is provided with a docking structure identical to the structure of the lower end of the transition box 1. The upper end of the head support box 3 is docked with the lower end of the intermediate box 2 through the docking structure. The upper end of the head support box 3 is provided with a docking hole 16 that matches the lower end of the intermediate box 2. The lower ends of both sides of the head support box 3 have inwardly inclined folding edges 33. Mud holes 34 are provided on the side and folding edges 33 of the head support box 3. The mud holes 34 are connected to the docking holes 16 at the upper end of the head support box 3 through a preset pipeline 15 to realize the transportation and circulation of mud. An electric lubrication pump assembly 31 is installed in the middle of the head support box 3. The electric lubrication pump assembly 31 is connected to the docking holes 16 at the upper end of the head support box 3 through a preset pipeline 15 to realize the supply of lubricating oil.

[0042] Recombination Figure 11 and Figure 12 As shown, the guide wheel assembly 4 is fixedly connected to the lower end of the head support box 3. The lower end of the head support box 3 has a concave arc-shaped sealing plate 35. The upper part of the guide wheel 42 in the guide wheel assembly 4 extends into the arc-shaped sealing plate 35, thereby reducing the distance between the guide wheel 42 and the head support box 3, which is conducive to improving the strength of the connection.

[0043] The guide wheel assembly 4 includes a guide wheel 42 with a center hole in the middle. A rotating shaft 43 is passed through the center hole of the guide wheel 42, and a bearing 49 is installed between the rotating shaft 43 and the guide wheel 42. Two side support plates 44 are symmetrically arranged on both sides of the guide wheel 42. The upper ends of the side support plates 44 are fixedly connected to the lower end of the head support box 3 by bolts. A center hole is formed in the middle of the side support plates 44, and the two ends of the rotating shaft 43 are passed through the center hole of the side support plates 44 on the corresponding side. The right end of the rotating shaft 43 has a step, and the right end of the rotating shaft 43 and the right side support plate 44 are positioned by the step; the left end of the rotating shaft 43 is fixed with a positioning plate 46 by bolts. The positioning plate 46 presses on the left side support plate 44 to achieve the positioning of the rotating shaft 43 and the side support plate 44. Dynamic sealing is achieved between the outer peripheral side of the guide wheel 42 and the side support plates 44 by a dynamic seal 45.

[0044] An oil hole 48 is formed in the side support plate 44. The outer end of the oil hole 48 is connected to the electric lubrication pump assembly 31 via the oil pipe 32, and the inner end of the oil hole 48 is connected to the dynamic seal 45, thereby supplying oil to the dynamic seal 45. In addition, the lubricating oil in the dynamic seal 45 is connected to the bearing 49 through the gap between the side support plate 44 and the guide wheel 42, thereby supplying oil to the bearing 49.

[0045] In this embodiment, an end cap 47 is fixed to the outside of the side support plate 44, sealing the central hole of the side support plate 44. The end cap 47 also seals the end of the rotating shaft 43, forming a sealed space inside the side support plate 44. A pressure sensor 41 is mounted on the inner wall of one side of the end cap 47, which detects external pressure by detecting the deformation of the side support plate 44. During actual operation, as the depth of the guide wheel increases, the external mud pressure increases. The pressure sensor 41 ultimately transmits the detected pressure information to the electric lubrication pump assembly 31. Based on this information, the electric lubrication pump assembly 31 gradually increases the pressure of the lubricating oil, ensuring that the lubricating oil pressure is always greater than the external pressure, thereby preventing mud from entering the guide wheel at the dynamic seal 45.

[0046] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A transition box, characterized in that: It comprises a box body enclosed by an upper sealing plate (11), a lower sealing plate (12), end plates (13) at both ends, and side plates (14) at both sides; The width of the upper sealing plate (11) is greater than that of the lower sealing plate (12); a plurality of docking holes (16) with different functions are provided on the upper sealing plate (11) and the lower sealing plate (12); and the arrangement positions of the docking holes (16) on the upper sealing plate (11) and the lower sealing plate (12) are different; and a preset pipeline (15) is provided in the box body for docking and connecting the docking holes (16) with the same function on the upper sealing plate (11) and the lower sealing plate (12).

2. A transition box according to claim 1, characterized in that: One end of the box body close to the lower sealing plate (12) is a docking structure; The docking structure comprises a transverse rib plate (17) arranged in parallel between the upper sealing plate (11) and the lower sealing plate (12); both ends of the transverse rib plate (17) are fixedly connected to the end plates (13) at both ends, respectively, to divide the box into a lower cavity (102) and an upper cavity (101); The side plate (14) comprises a lower side plate (142) sealed on the outside of the lower cavity (102) and an upper side plate (141) sealed on the outside of the upper cavity (101); the lower side plate (142) is a structure with a convex middle and concave ends, and a concave portion (1021) is formed between the end of the lower side plate (142) and the end plate (13), the lower sealing plate (12) and the transverse rib plate (17); The recessed portion (1021) is provided with a longitudinal short rib plate (18) whose two ends are fixedly connected to the lower sealing plate (12) and the transverse rib plate (17), and a transverse connection hole (181) is opened on the longitudinal short rib plate (18); Positioning pin holes (122) are respectively provided at both ends of the lower sealing plate (12), and longitudinal connecting holes (121) are provided on the lower sealing plate (12) on both sides of the positioning pin holes (122), and the longitudinal connecting holes (121) are opposite to the recessed portion (1021).

3. A transition box according to claim 2, characterized in that: A longitudinal rib plate (19) is arranged parallel to the two end plates (13); the two ends of the longitudinal rib plate (19) are fixedly connected to the upper sealing plate (11) and the lower sealing plate (12), respectively; the middle of the longitudinal rib plate (19) intersects with the middle of the transverse rib plate (17); and the longitudinal rib plate (19) and the transverse rib plate (17) are provided with through grooves for the preset pipeline (15) to pass through.

4. A transition box according to claim 1, characterized in that: The docking hole (16) on the upper sealing plate (11) includes a slurry pipe hole (161) opened in the middle of the upper sealing plate (11), a lubricating oil pipe hole (162) opened at one end of the upper sealing plate (11), and a square tube hole (163) for placing an inclinometer opened at the other end of the upper sealing plate (11); The docking hole (16) on the lower sealing plate (12) includes a lubricating oil pipe hole (162) opened in the middle of the upper sealing plate (11); square tube holes (163) and square tube auxiliary holes (1630) for placing an inclinometer are opened on the lower sealing plate (12) on both sides of the lubricating oil pipe hole (162); and slurry pipe holes (161) and slurry pipe auxiliary holes (1610) are opened at both ends of the lower sealing plate (12).

5. A TRD wall forming machine tool box, using a transition box according to any one of claims 1 to 4, characterized in that: include: The intermediate box (2) has a docking structure at its upper and lower ends; the upper end of the intermediate box (2) is docked on the lower sealing plate (12) of the transition box (1); The head support box (3) has a docking structure at its upper end; the upper end of the head support box (3) is docked with the lower end of the middle box (2); A guide wheel assembly (4) fixedly connected to the lower end of the head support box (3); The head support box (3) is equipped with an electric lubrication pump assembly (31), which supplies lubricating oil to the guide wheel assembly (4) through an oil pipe (32); a pressure sensor (41) for detecting external pressure is installed on the side wall of the guide wheel assembly (4), and the pressure of the lubricating oil provided by the electric lubrication pump assembly (31) is greater than the external pressure detected by the pressure sensor (41).

6. A transition box according to claim 5, characterized in that: A plurality of axially opposite docking holes (16) with different functions are provided at both ends of the intermediate box (2), and the two ends of the intermediate box (2) are connected to each other via a preset pipeline (15) laid in the intermediate box (2).

7. A transition box according to claim 6, characterized in that: The upper end of the head support box (3) is provided with a docking hole (16) that matches the lower end of the middle box (2); The lower ends of both sides of the head support box (3) have inwardly inclined folding edges (33), and mud holes (34) are provided on the side and folding edges (33) of the head support box (3). The mud holes (34) are correspondingly connected to the docking holes (16) at the upper end of the head support box (3) through preset pipelines (15) laid in the head support box (3).

8. The transition box according to claim 7, characterized in that: The lower end of the head support box (3) has an inwardly concave arc-shaped sealing plate (35), and the upper part of the guide wheel (42) in the guide wheel assembly (4) extends into the arc-shaped sealing plate (35).

9. The transition box according to claim 5, characterized in that: The guide wheel assembly (4) comprises: A guide wheel (42) is provided with a central hole in the middle; A rotating shaft (43) is inserted into the center hole of the guide wheel (42); a bearing (49) is installed between the rotating shaft (43) and the guide wheel (42); A pair of side support plates (44) are disposed on both sides of the guide wheel (42) and are used to dock with the lower end of the head support box (3); a center hole is opened in the middle of the side support plate (44), and both ends of the rotating shaft (43) are positioned in the center hole of the side support plate (44) on the corresponding side; a dynamic seal is achieved between the outer peripheral side of the guide wheel (42) and the side support plate (44) through a dynamic seal (45).

10. The transition box according to claim 9, characterized in that: One end of the rotating shaft (43) is positioned with the side support plate (44) on one side via a step on the rotating shaft (43), and the other end of the rotating shaft (43) is fixed with a positioning plate (46) pressed against the side support plate (44) on the other side; End covers (47) for sealing both ends of the rotating shaft (43) are fixed to the outside of the side support plate (44); the pressure sensor (41) for detecting external pressure is installed on the inner wall of at least one of the end covers (47); The side support plate (44) is provided with an oil hole (48) connected to the dynamic seal (45) on the corresponding side. The lubricating oil in the dynamic seal (45) is connected to the bearing (49) through the gap between the side support plate (44) and the guide wheel (42).

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