Pipeline dredging and dredging keeping device and pipeline updating heading machine

Abstract

The utility model relates to a pipeline dredging and dredging keeping device and a pipeline updating heading machine, and belongs to the field of heading machines. The pipeline dredging and dredging-keeping device comprises a dredging-keeping pipe and a driving shaft at least partially arranged in the dredging-keeping pipe, the driving shaft comprises an extending section which penetrates through the side wall of the dredging-keeping pipe and extends out of the dredging-keeping pipe, or the driving shaft comprises a connecting end which extends to the side wall of the dredging-keeping pipe and is exposed; the pipeline dredging and dredging keeping device further comprises a rotating power source which is in transmission connection to the extending section or the connecting end. The driving shaft is arranged to drive the advancing cutter head to move, so that the advancing cutter head can conveniently rotate for cutting; at the moment, the rotating speed of the preceding cutter head is limited by the rotating power source and is not driven by the breaking and digging cutter head any more, so that the rotating speed of the preceding cutter head can be controlled more conveniently; therefore, the problems of low rotating speed and poor cutting capacity of the advanced cutter head caused by the fact that the advanced cutter head in the pipeline dredging and dredging keeping device is driven by the breaking and digging cutter head to rotate synchronously in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to a pipeline desilting and dredging device and a pipeline renewal tunneling machine, belonging to the field of tunneling machines. Background Art

[0002] Urban drainage and sewage are generally carried out through underground pipes. As the service life of the pipes increases or the demand for use changes, the old pipes need to be removed and new pipes installed underground. During the construction process, in order not to affect ground traffic, shield machines or pipe jacking machines are also used to remove the old pipes. Different from traditional working conditions, due to the old pipes, the front end of the shield is in a hollow state during excavation, making it difficult to discharge slag through screw machines or mud-water circulation, and unable to achieve earth pressure balance or mud-water balance. At the same time, the debris that cannot be discharged will cause the old pipe to be blocked, increasing the difficulty of excavation.

[0003] For example, a Chinese invention patent application with an application publication date of October 30, 2020 and an application publication number of CN 111852493 A discloses a pipeline renewal tunnel boring machine and a construction method thereof. Specifically, the pipeline renewal tunnel boring machine includes a tunnel boring machine mainframe and a breaking and digging cutter disc arranged at the front end of the tunnel boring machine mainframe for crushing and dismantling the old pipeline, and a slag cleaning and unblocking device is also provided on the breaking and digging cutter disc. The new pipeline is laid behind the tunnel boring machine. At this time, the old pipeline is located in front of the tunnel boring machine and the new pipeline is located behind the tunnel boring machine. In order to avoid the sewage and debris in the old pipeline from being unable to be discharged, resulting in construction difficulties, a circulation system for unblocking is provided on the slag cleaning and unblocking device, thereby connecting the old pipeline and the new pipeline. The slag cleaning and unblocking device includes a leading cutter disc located inside the old pipeline to clean the debris in the pipeline and a drive shaft tube (i.e., unblocking tube) located behind the leading cutter disc to discharge the sewage and debris in the old pipeline into the new pipeline. A drive shaft is supported inside the drive shaft tube. The drive shaft and the drive shaft tube are coaxially arranged and the two can rotate relative to each other. One end of the drive shaft is fixedly connected to the leading cutter disc, and the other end is fixedly connected to the excavation cutter disc on the main body of the tunnel boring machine. That is to say, the excavation cutter disc of the tunnel boring machine will drive the leading cutter disc to rotate synchronously, so that the leading cutter disc can clean the debris in the old pipeline and transfer the materials in the old pipeline to the new pipeline through the drive shaft tube. At the same time, a pipe cleaner is also arranged on the drive shaft tube. The pipe cleaner contacts the inner wall of the old pipeline, so as to form a mud and water bin between the pipe cleaner and the excavation cutter disc, which is convenient for achieving balance with the soil pressure bin in the tunnel boring machine and convenient for excavation.

[0004] In the above technical scheme, the rotation speeds of the leading cutter disc and the digging cutter disc are the same, however, the actual working conditions faced by the two are different. The digging cutter disc relies on squeezing the old pipe to complete the crushing, so the main function is the squeezing between the digging cutter disc and the old pipe, and its rotation speed is not set too fast; the leading cutter disc needs to cut solid materials such as tree roots in the debris, and the cutting process often needs to increase the rotation speed of the cutter disc, that is, the leading cutter disc needs to play a cutting role and needs to maintain a higher rotation speed. Since the rotation speeds of the leading cutter disc and the digging cutter disc are the same, their rotation speed is not enough to meet the rotation speed of the leading cutter disc when cutting, resulting in poor cutting effect of the leading cutter disc. Utility Model Content

[0005] The purpose of the utility model is to provide a pipeline dredging and unblocking device, which is used to solve the problem of low speed and poor cutting ability of the leading cutter disc caused by the leading cutter disc being driven by the excavation cutter disc and rotating synchronously in the pipeline dredging and unblocking device in the prior art; the purpose of the utility model is also to provide a pipeline renewal tunneling machine, which is used to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the pipeline desilting and unblocking device in the utility model adopts the following technical solutions:

[0007] A pipeline dredging and unblocking device comprises a leading cutter disc for extending into an old pipeline and a unblocking pipe for connecting the old pipeline and a new pipeline. The pipeline dredging and unblocking device also comprises a driving shaft at least partially arranged in the unblocking pipe and fixedly connected to the leading cutter disc to drive the leading cutter disc to move. The driving shaft comprises an extension section passing through the side wall of the unblocking pipe and extending outside the unblocking pipe, or the driving shaft comprises a connecting end extending to the side wall of the unblocking pipe and exposed. The pipeline dredging and unblocking device also comprises a rotating power source transmission-connected to the extension section or the connecting end.

[0008] Furthermore, the maintenance tube extends in the front-to-back direction, and the drive shaft includes a first drive shaft segment extending in the front-to-back direction and a second drive shaft segment extending perpendicular to the front-to-back direction. The first drive shaft segment and the second drive shaft segment are transmission-connected, and the extending segment or the connecting end is located on the second drive shaft segment.

[0009] Furthermore, the ends of the first drive shaft segment and the second drive shaft segment are provided with bevel gears meshing with each other, and the pipeline dredging and unblocking device also includes a sealing box body arranged outside the bevel gear to accommodate the bevel gear, and the sealing box body is provided with a first through-hole for the first drive shaft segment to pass through and a second through-hole for the second drive shaft segment to pass through, and the first drive shaft segment and the second drive shaft segment are respectively sealed with the corresponding through-holes.

[0010] Furthermore, a third through hole for the second drive shaft segment to pass through is provided on the through hole, and a sealing bearing for sealing the space between the second drive shaft segment and the through hole is installed in the third through hole.

[0011] Furthermore, the front end of the maintenance pipe is located behind the leading cutter disc, and the end of the maintenance pipe is provided with an inlet for the inflow of sewage and debris in the old pipe. A filtering structure is provided on the inlet, and the drive shaft passes through the filtering structure and is fixedly connected to the leading cutter disc.

[0012] Furthermore, a sealing plate is also provided on the maintenance pipe, and the sealing plate is located behind the leading cutter disc, and the sealing plate is used for sealing with the inner wall surface of the old pipe.

[0013] Furthermore, a scraper disc for scraping the inner wall surface of the old pipe is provided in front of the sealing plate on the maintenance pipe, and the scraper disc is annular to push the sewage and debris in the old pipe forward.

[0014] Furthermore, a flange plate is fixedly arranged on the outer peripheral surface of the maintenance pipe, and the scraper disc is fixedly arranged on the flange plate.

[0015] Furthermore, a spiral plate is fixedly provided on the driving shaft inside the maintenance pipe, and the spiral plate is used to rotate under the drive of the driving shaft and drive the sewage and debris in the old pipe to flow backward.

[0016] The beneficial effects of the pipeline dredging and unblocking device in the utility model are as follows: the utility model improves the existing pipeline dredging and unblocking device, and provides a leading cutter disc for cutting and cleaning the debris in the old pipeline, and provides a unblocking pipe to facilitate the communication between the sewage and debris in the old pipeline and the new pipeline, so as to avoid blockage in front of the excavation cutter disc and affect the advancement of the tunnel boring machine; the movement of the leading cutter disc is driven by the driving shaft, so that the leading cutter disc is rotated for cutting; an extension section or a connecting end is provided on the driving shaft, and a rotating power source is provided on the extension section or the connecting end, so that the driving shaft is driven by the rotating power source to rotate, and then the leading cutter disc is driven to rotate. At this time, the rotation speed of the leading cutter disc is limited by the rotating power source and is no longer driven by the excavation cutter disc, so the rotation speed of the leading cutter disc can be controlled more conveniently, thereby solving the problem of low rotation speed and poor cutting ability of the leading cutter disc in the pipeline dredging and unblocking device in the prior art, which is caused by the synchronous rotation of the leading cutter disc driven by the excavation cutter disc.

[0017] A pipeline renewal tunneling machine comprises an equipment main body and a pipeline dredging and unblocking device arranged at the front end of the pipeline renewal tunneling machine, wherein a cutting cutter disc is arranged on the equipment main body, wherein the pipeline dredging and unblocking device comprises a leading cutter disc for extending into an old pipeline and a unblocking pipe for connecting the old pipeline and a new pipeline, the pipeline dredging and unblocking device also comprises a driving shaft at least partially arranged in the unblocking pipe and fixedly connected to the leading cutter disc to drive the leading cutter disc to move, the driving shaft comprises an extension section passing through the side wall of the unblocking pipe and extending outside the unblocking pipe, or the driving shaft comprises a connecting end extending to the side wall of the unblocking pipe and exposed, and the pipeline dredging and unblocking device also comprises a rotating power source transmission-connected to the extension section or the connecting end.

[0018] Furthermore, the maintenance tube extends in the front-to-back direction, and the drive shaft includes a first drive shaft segment extending in the front-to-back direction and a second drive shaft segment extending perpendicular to the front-to-back direction. The first drive shaft segment and the second drive shaft segment are transmission-connected, and the extending segment or the connecting end is located on the second drive shaft segment.

[0019] Furthermore, the ends of the first drive shaft segment and the second drive shaft segment are provided with bevel gears meshing with each other, and the pipeline dredging and unblocking device also includes a sealing box body arranged outside the bevel gear to accommodate the bevel gear, and the sealing box body is provided with a first through-hole for the first drive shaft segment to pass through and a second through-hole for the second drive shaft segment to pass through, and the first drive shaft segment and the second drive shaft segment are respectively sealed with the corresponding through-holes.

[0020] Furthermore, a third through hole for the second drive shaft segment to pass through is provided on the through hole, and a sealing bearing for sealing the space between the second drive shaft segment and the through hole is installed in the third through hole.

[0021] Furthermore, the front end of the maintenance pipe is located behind the leading cutter disc, and the end of the maintenance pipe is provided with an inlet for the inflow of sewage and debris in the old pipe. A filtering structure is provided on the inlet, and the drive shaft passes through the filtering structure and is fixedly connected to the leading cutter disc.

[0022] Furthermore, a sealing plate is also provided on the maintenance pipe, and the sealing plate is located behind the leading cutter disc, and the sealing plate is used for sealing with the inner wall surface of the old pipe.

[0023] Furthermore, a scraper disc for scraping the inner wall surface of the old pipe is provided in front of the sealing plate on the maintenance pipe, and the scraper disc is annular to push the sewage and debris in the old pipe forward.

[0024] Furthermore, a flange plate is fixedly arranged on the outer peripheral surface of the maintenance pipe, and the scraper disc is fixedly arranged on the flange plate.

[0025] Furthermore, a spiral plate is fixedly provided on the driving shaft inside the maintenance pipe, and the spiral plate is used to rotate under the drive of the driving shaft and drive the sewage and debris in the old pipe to flow backward.

[0026] The beneficial effects of the pipeline renewal tunneling machine in the utility model are as follows: the utility model improves the existing pipeline renewal tunneling machine, and facilitates the excavation and discharge of sewage and debris in the old pipeline by setting the equipment main body and the pipeline dredging and unblocking device; by setting the leading cutter disc for cutting and cleaning the debris in the old pipeline, by setting the unblocking pipe, it is convenient to communicate the sewage and debris in the old pipeline and the new pipeline, so as to avoid blocking in front of the excavation cutter disc and affecting the advancement of the tunneling machine; by setting the driving shaft to drive the movement of the leading cutter disc, it is convenient to rotate the leading cutter disc for cutting; by setting the extension section or the connecting end on the driving shaft, the rotation of the driving shaft is conveniently driven by the rotating power source, and then the rotation of the leading cutter disc is driven, at this time, the rotation speed of the leading cutter disc is limited by the rotating power source and is no longer driven by the excavation cutter disc, so the rotation speed of the leading cutter disc can be controlled more conveniently, thereby solving the problem of low rotation speed and poor cutting ability of the leading cutter disc caused by the leading cutter disc in the pipeline dredging and unblocking device in the prior art being driven by the excavation cutter disc and rotating synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of Embodiment 1 of the pipeline renewal tunnel boring machine in the utility model;

[0028] Figure 2 It is a structural schematic diagram of a pipeline desilting and unblocking device in Embodiment 1 of a pipeline renewal tunneling machine in the utility model;

[0029] Figure 3 It is a structural schematic diagram of the leading cutterhead in Example 1 of the pipeline renewal tunneling machine in the utility model;

[0030] Figure 4 It is a structural schematic diagram of the scraper disc in Example 1 of the pipeline renewal tunneling machine in the utility model;

[0031] Figure 5 It is a schematic diagram of the fixing form of the cutting knife on the leading cutting disc in the embodiment 1 of the pipeline renewal tunnel boring machine in the utility model;

[0032] Figure 6 It is a structural schematic diagram of the cutter in Example 1 of the pipeline renewal tunneling machine in the utility model;

[0033] Figure 7 It is a structural schematic diagram of the advance cutter disc in Example 2 of the pipeline renewal tunnel boring machine in the utility model.

[0034] In the figure: 11, equipment body; 12, excavation cutter disc; 13, old pipe; 2, maintenance pipe; 21, first flange plate; 22, second flange plate; 23, filter grille; 24, spiral plate; 3, advance cutter disc; 31, wheel rod; 32, cutter slot; 33, cutter; 34, toothed knife; 35, reamer; 4, scraper disc; 5, sealing rubber plate; 61, first drive shaft section; 62, second drive shaft section; 63, sealing box; 64, motor; 65, sealed bearing. DETAILED DESCRIPTION

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] In the utility model, a driving shaft for driving the leading cutter disc to move is extended out of the maintenance pipe to form an extended section, and a rotating power source is separately arranged on the extended section for driving, so that the leading cutter disc and the excavating cutter disc can be controlled according to their respective required rotational speeds, thereby facilitating increasing the rotational speed of the leading cutter disc to achieve the cutting function.

[0037] In the embodiment 1 of the pipeline renewal boring machine (hereinafter referred to as boring machine) in the utility model:

[0038] like Figure 1 As shown, the tunnel boring machine in this embodiment includes an equipment main body 11 and a pipeline silting and unblocking device arranged at the front end of the tunnel boring machine, wherein the equipment main body 11 is provided with a breaking cutter disc 12 for generating extrusion between the old pipeline 13 during movement for tunneling, and the middle part of the breaking cutter disc 12 corresponds to the middle part of the old pipeline 13. Since the old pipeline 13 is a hollow structure, the center position of the breaking cutter disc 12 does not require tunneling capability. In order to avoid the blocking of sewage and debris in the old pipeline 13 by the breaking cutter disc 12 during tunneling, the sewage and debris in the old pipeline 13 are transferred by the pipeline silting and unblocking device arranged at the front end of the tunnel boring machine.

[0039] like Figure 1 and Figure 2As shown, specifically, the pipeline dredging and unblocking device includes a unblocking pipe 2 that penetrates the excavation cutter disc 12, and the two ends of the unblocking pipe 2 are respectively connected to the internal space of the old pipeline 13 and the internal space of the new pipeline, so as to facilitate the transportation of sewage and debris in the old pipeline 13 to the new pipeline. The old pipeline 13 not only contains sewage, but also silt is deposited, and there are roots of plants or trees in the silt, which affects the advancement of the unblocking pipe 2, so it is necessary to cut the silt and the debris in the silt. The part of the unblocking pipe 2 used to extend into the old pipeline 13 is defined as the front end, and the part used to extend into the new pipeline is defined as the rear end. A leading cutter disc 3 is also provided at the front end of the unblocking pipe 2 for cutting and separating the silt and tree roots and other debris in the old pipeline 13. The leading cutter disc 3 needs to cut the debris in the old pipeline 13, so the leading cutter disc 3 needs to rotate when in use, so a drive shaft connected to the leading cutter disc 3 to drive the leading cutter disc 3 to move is also provided in the unblocking pipe 2.

[0040] like Figure 3 , Figure 5 and Figure 6 As shown, the leading cutter disc 3 and the drive shaft are fixedly connected together. Specifically, the leading cutter disc 3 includes an annular cutter disc body. The outer peripheral surface of the cutter disc body is provided with a toothed cutter 34 for contacting the inner wall of the old pipe 13. The toothed cutters 34 are evenly and spacedly arranged along the outer peripheral surface of the cutter disc body, so as to facilitate the scraping of the sludge adhering to the old pipe 13 and facilitate the transportation into the new pipe. The leading cutter disc 3 is also provided with a wheel rod 31 fixedly connected to the cutter disc body and the central drive shaft. The wheel rod 31 is provided with a cutter slot 32 for fixing a cutter 33. The cutter 33 is penetrated and clamped in the cutter slot 32. The wheel rod 31 is evenly spacedly arranged around the axis of the cutter disc body. At least two cutter slots 32 are provided on each wheel rod 31. A cutter 33 is provided in each cutter slot 32. Therefore, the leading cutter disc 3 can play a cutting role during the rotation process, so as to facilitate the cutting of tree roots and other debris in the old pipe 13.

[0041] like Figure 1 and Figure 2As shown, the drive shaft needs to be driven by a rotating power source to move. Specifically, the tong pipe 2 is arranged along the extension direction of the tunnel. The drive shaft includes a first drive shaft section 61 arranged along the extension direction of the tunnel and a second drive shaft section 62 arranged perpendicular to the extension direction of the tunnel. The first drive shaft section 61 and the second drive shaft section 62 are arranged perpendicular to each other and the first drive shaft section 61 and the second drive shaft section 62 are connected in transmission. The fixedly connected part on the leading cutter disc 3 is the first drive shaft section 61, and the second drive shaft section 62 is also provided with an extended section that passes through the side wall of the tong pipe 2 and is reserved outside the tong pipe 2. The rotating power source is a motor 64, which is arranged in the main body of the equipment and connected to the shield through a connecting bracket. The output end of the motor 64 is fixedly connected to the second drive shaft section 62, so that the rotational motion can be transmitted to the second drive shaft section 62, and then transmitted to the first drive shaft section 61 by the second drive shaft section 62, and finally drives the leading cutter disc 3 to rotate. The second drive shaft segment 62 needs to pass through the side wall of the maintenance tube 2. In order to achieve support and sealing here, a third through hole for the second drive shaft segment 62 to pass through is provided on the maintenance tube 2. A sealing bearing 65 for sealing the space between the second drive shaft segment 62 and the maintenance tube 2 is installed in the third through hole. The transmission structure between the first drive shaft section 61 and the second drive shaft section 62 is located in the through-tube 2. There is a lot of sewage in the through-tube 2. In order to realize the transmission connection between the first drive shaft section 61 and the second drive shaft section 62, bevel gears (not shown in the figure) that mesh with each other are also arranged at the ends of the first drive shaft section 61 and the second drive shaft section 62. A sealing box 63 for covering the bevel gear is also arranged on the outside of the bevel gear. The sealing box 63 is provided with a first through hole for the first drive shaft section 61 to pass through and a second through hole for the second drive shaft section 62 to pass through. In order to prevent sewage and debris from entering the sealing box 63 and affecting the rotation of the bevel gear, sealing rings that maintain sealing with the first drive shaft section 61 and the rear end 62 of the second drive shaft are respectively arranged in the first through hole and the second through hole, so that even if the sewage in the through-tube 2 floods the sealing box 63, a good environment for the operation of the bevel gear can be maintained. Of course, in other embodiments, a worm wheel can also be arranged on the first drive shaft section, and a worm can be arranged on the second drive shaft section.

[0042] Of course, in other embodiments, the rotary power source may also be set as a hydraulic motor. Alternatively, in other embodiments, mutually meshing bevel gears may be respectively set between the first drive shaft section and the second drive shaft section, and a filter screen with a filtering function may be set outside the bevel gear. Alternatively, in other embodiments, the tong tube is L-shaped, and the drive shaft is in a straight line extending out of one end of the L-shaped tong tube. At this time, the drive shaft is also an integral long shaft and does not need to be set in sections. Alternatively, in other embodiments, a sealed bearing may no longer be set, but a sealing ring may be set in the perforation of the tong tube, and a sealing ring and a second drive shaft section may be used for sealing. Alternatively, in other embodiments, the second drive shaft section no longer extends out of the tong tube, but is parallel to the side wall of the tong tube or is located inside the tong tube. When it is necessary to connect to the motor, the output shaft of the motor extends into the tong tube, and the part of the second drive shaft section used to connect to the motor also constitutes the connection end on the drive shaft. Alternatively, in other embodiments, the drive shaft and the motor are not fixedly connected, but are connected by meshing gear transmission.

[0043] There are a lot of sludge and debris in the old pipeline 13. When transporting to the new pipeline, large debris needs to be cut and cleaned to avoid affecting the fluidity of the new pipeline. The front end of the maintenance pipe 2 is located behind the leading cutter disc 3. The end of the maintenance pipe 2 is provided with an inlet for the sewage and debris in the old pipeline 13 to flow in. A filtering structure is provided on the inlet, so that only small-sized debris will flow into the maintenance pipe 2. Specifically, the filtering structure is a conical filtering grid 23, and the first drive shaft section 61 passes through the cone top part of the filtering structure. During the advancement of the tunneling machine, the equipment body 11 will drive the pipeline dredging and maintenance device forward, and the conical filtering structure facilitates its forward advancement. Of course, in other embodiments, the filtering structure can also be set as a filter plate, and a filtering hole is set on the filter plate. Alternatively, in other embodiments, the filtering structure can no longer be set on the inlet of the maintenance pipe, but on the leading cutter disc, that is, between two adjacent wheel rods of the leading cutter disc, so that the sewage entering the inlet of the maintenance pipe has been filtered.

[0044] like Figure 1 and Figure 4As shown, in the process of excavation by the tunnel boring machine, in order to stably control the soil and avoid the collapse of the soil, it is necessary to achieve pressure balance between the soil pressure bin in the tunnel boring machine and the face in front of the excavation cutter disc 12. The form of the old pipe 13 prevents excessive pressure from appearing in front of the excavation cutter disc 12. Therefore, a sealing plate for sealing with the inner wall of the old pipe 13 is also provided on the maintenance pipe 2. The sealing plate is located in front of the excavation cutter disc 12. During the excavation of the tunnel boring machine, the excavated slag will be concentrated between the sealing plate and the excavation cutter disc 12, forming a pressure-maintaining bin that maintains pressure balance with the rear soil pressure bin, so as to facilitate the realization of soil pressure balance or mud-water balance during the excavation of the tunnel boring machine. Specifically, the sealing plate is a sealing rubber plate 5, and its edge portion has a rubber edge, which is convenient for sealing with the inner wall of the old pipe 13. During assembly, the sealing rubber plate 5 is interference-fitted in the old pipe 13, and the rubber edge of the sealing rubber plate 5 is kept in a deformed state to produce a seal. In order to realize the installation of the sealing rubber plate 5, a second flange plate 22 is welded on the outer peripheral surface of the through-tube 2. The second flange plate 22 is parallel to the plate surface of the sealing rubber plate 5 and is arranged in close contact. The sealing rubber plate 5 is fixedly arranged on the second flange plate 22 to realize the fixed connection with the through-tube 2. In order to facilitate the installation of the sealing rubber plate 5 on the through-tube 2, a circumvention hole for avoiding the through-tube 2 is also arranged on the sealing rubber plate 5. Due to the setting of the second flange plate 22, the aperture of the circumvention hole on the sealing rubber plate 5 can be different from the outer diameter of the through-tube 2. Of course, in other embodiments, the sealing rubber plate may no longer be provided, but a sealing metal plate made of metal may be provided, and a sealing groove for accommodating a sealing ring is provided on the outer peripheral surface of the sealing metal plate, and the sealing between the sealing plate and the old pipe is achieved through the sealing groove. Alternatively, in other embodiments, the sealing plate may no longer be provided, and the tunnel boring machine no longer has the function of earth pressure balance or mud water balance. Alternatively, in other embodiments, the sealing rubber plate may be directly welded or bonded to the outer circumferential surface of the maintenance tube, and no second flange plate is provided. The diameter of the avoidance hole on the sealing rubber plate is the same as the outer diameter of the maintenance tube 2.

[0045] In order to protect the sealing rubber plate 5 and to perform secondary cleaning on the inner wall surface of the old pipe 13 cleaned by the advance cutter disc 3, a scraper disc is provided between the sealing rubber plate 5 and the advance cutter disc 3 on the maintenance pipe 2. The scraper disc is annular. A first flange plate 21 is welded and fixed on the outer peripheral surface of the maintenance pipe 2. The first flange plate 21 is fixedly connected to the rear side of the scraper disc. An inclined scraper blade is provided on the front side of the scraper disc. The scraper blade is in contact with the inner wall surface of the old pipe 13 and scrapes off the sludge on the old pipe 13. The inner ring of the scraper disc is fixedly connected to the first flange plate 21, and the first flange plate 21 is sealed and fixedly connected to the outer peripheral surface of the through-tube 2. The opening on the scraper disc is larger than the outer diameter of the through-tube 2, and the scraper disc actually cuts off the front and rear space. Then, in the process of the tunneling machine moving forward, the scraper disc will push the sewage and debris in front of the scraper disc forward, and an idle area is also formed between the scraper disc and the sealing rubber plate 5 to prevent excessive debris from rushing to the sealing plate and causing damage to the sealing plate. Alternatively, in other embodiments, the scraper disc may no longer be provided, but a plurality of sealing rubber plates may be provided in sequence at intervals. Alternatively, in other embodiments, the first flange plate may no longer be provided, but the scraper disc may be directly welded and provided on the outer peripheral surface of the through-tube, and the diameter of the opening on the scraper disc is equal to the outer diameter of the through-tube. Alternatively, in other embodiments, a flange surface may also be provided on the through-tube, so as to facilitate the connection of the first flange plate or the scraper disc. Alternatively, in other embodiments, the rotary power source may also be provided between the scraper disc and the sealing plate.

[0046] like Figure 1 As shown, when the sewage and debris in the old pipe 13 flow into the new pipe, the driving force depends on the change of the liquid level or the reaction force of the resistance when moving forward. In order to achieve good drive, a spiral plate 24 is fixedly provided on the first drive shaft section 61 in the maintenance pipe 2. When the first drive shaft section 61 rotates, the spiral plate 24 is driven to rotate. At this time, the spiral plate 24 drives the sewage and debris in the old pipe 13 to flow backward. At this time, the function of the spiral plate 24 is the same as the working principle of the screw conveyor, which will not be repeated here. It is worth noting that at this time, the spiral plate 24 can not only transport the sewage, but also the spiral plate 24 arranged in the maintenance pipe 2 can also support the first drive shaft section 61. Of course, in other embodiments, a suction device can also be provided at the rear end of the maintenance pipe to suck the sewage and debris.

[0047] During the use of the tunnel boring machine, the main body 11 of the equipment moves forward under the action of the propulsion cylinder, and the pipeline desilting and unblocking device will extend into the old pipeline 13 accordingly. During the movement, the advance cutter disc 3 rotates under the drive of the motor 64 to cut the debris in the old pipeline 13. Since the speed of the motor 64 can be very high, the speed of the advance cutter disc 64 driven by the motor 64 can be increased, which is convenient for cutting debris such as tree roots. Afterwards, the sewage and debris in the old pipeline 13 enter the unblocking pipe 2 under the action of the filter plate of the filter grid 23, and are transported backward under the action of the spiral plate 24 until they are transported to the new pipeline. At the same time, the scraper disc moves forward to push the debris that has not entered the unblocking pipe 2 forward until it reaches the cleaning port and is taken out manually. In addition, under the action of the sealing rubber plate 5, the slag crushed by the digging disc 12 will enter between the sealing rubber plate 5 and the digging disc 12, and form a pressure-keeping chamber with a pressure balance with the rear soil pressure chamber, which is convenient for tunneling.

[0048] In the embodiment 2 of the pipeline renewal boring machine (hereinafter referred to as boring machine) in the utility model:

[0049] This embodiment is improved on the basis of embodiment 1, mainly replacing the pipeline desilting and unblocking device in the tunnel boring machine, specifically, Figure 7 As shown, the leading cutter disc is replaced. The wheel rod and the cutter are no longer provided on the leading cutter disc. Instead, a spirally arranged reamer is directly provided between the first drive shaft section and the cutter disc body. During the rotation process, the tree roots and other debris inside the tunnel are cut and cleaned.

[0050] In the embodiment 1 of the pipeline desilting and unblocking device of the utility model:

[0051] The structure of the pipeline silting and unblocking device in this embodiment is the same as the structure of the pipeline silting and unblocking device in the above-mentioned pipeline renewal tunneling machine, and will not be repeated here.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipeline desilting and unblocking device, comprising a leading cutter disc for extending into an old pipeline and a unblocking pipe for connecting the old pipeline and a new pipeline, the pipeline desilting and unblocking device also comprises a drive shaft at least partially disposed in the unblocking pipe and fixedly connected to the leading cutter disc to drive the leading cutter disc to move, characterized in that: The drive shaft includes an extended section that passes through the side wall of the pipe and extends outside the pipe, or the drive shaft includes a connecting end that extends to the side wall of the pipe and is exposed. The pipeline dredging and unblocking device also includes a rotating power source that is transmission-connected to the extended section or the connecting end.

2. The pipeline desilting and unblocking device according to claim 1 is characterized in that: The maintenance tube extends in the front-to-back direction, and the drive shaft includes a first drive shaft section extending in the front-to-back direction and a second drive shaft section extending perpendicular to the front-to-back direction. The first drive shaft section and the second drive shaft section are transmission-connected, and the extending section or the connecting end is located on the second drive shaft section.

3. The pipeline desilting and unblocking device according to claim 2 is characterized in that: The ends of the first drive shaft segment and the second drive shaft segment are provided with bevel gears that mesh with each other. The pipeline dredging and unblocking device also includes a sealing box body arranged outside the bevel gear to accommodate the bevel gear. The sealing box body is provided with a first through-hole for the first drive shaft segment to pass through and a second through-hole for the second drive shaft segment to pass through. The first drive shaft segment and the second drive shaft segment are respectively sealed with the corresponding through-holes.

4. The pipeline desilting and unblocking device according to claim 2 or 3, characterized in that: The maintenance tube is provided with a third through hole for the second drive shaft section to pass through, and a sealing bearing for sealing the space between the second drive shaft section and the maintenance tube is installed in the third through hole.

5. The pipeline desilting and unblocking device according to any one of claims 1 to 3, characterized in that: The front end of the maintenance pipe is located behind the leading cutter disc. The end of the maintenance pipe is provided with an inlet for the sewage and debris in the old pipe to flow in. The inlet is provided with a filtering structure, and the drive shaft passes through the filtering structure and is fixedly connected to the leading cutter disc.

6. The pipeline desilting and unblocking device according to any one of claims 1 to 3, characterized in that: The maintenance pipe is also provided with a sealing plate, which is located behind the leading cutter disc and is used for sealing with the inner wall surface of the old pipe.

7. The pipeline desilting and unblocking device according to claim 6, characterized in that: A scraper disc for scraping the inner wall of the old pipe is also provided in front of the sealing plate on the maintenance pipe. The scraper disc is annular to push the sewage and debris in the old pipe forward.

8. The pipeline desilting and unblocking device according to claim 7 is characterized in that: A flange plate is fixedly arranged on the outer peripheral surface of the maintenance pipe, and the scraper disc is fixedly arranged on the flange plate.

9. The pipeline desilting and unblocking device according to any one of claims 1 to 3, characterized in that: A spiral plate is fixedly arranged on the driving shaft inside the maintenance pipe, and the spiral plate is used to rotate under the drive of the driving shaft and drive the sewage and debris in the old pipe to flow backwards.

10. A pipeline renewal tunnel boring machine, comprising a device body and a pipeline silting and clearing device arranged at the front end of the pipeline renewal tunnel boring machine, wherein a cutting disc is arranged on the device body, and the features are: The pipeline silting and unblocking device is the same as the pipeline silting and unblocking device described in any one of claims 1 to 9, and the unblocking pipe runs through the excavation cutter disc.

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