CN1452677A

CN1452677A - Device for opening narrow trenches and placing matching prefabricated elements

Info

Publication number: CN1452677A
Application number: CN01815259.7A
Authority: CN
Inventors: 爱德华多·戈麦斯·佩雷斯
Original assignee: Aplicaciones Especiales de Ingenieria Civil SA
Current assignee: Aplicaciones Especiales de Ingenieria Civil SA
Priority date: 2000-08-01
Filing date: 2001-07-24
Publication date: 2003-10-29
Anticipated expiration: 2021-07-24
Also published as: DE60107866T2; ATE285002T1; PT1325987E; WO2002012640A1; AU2001282135A1; EP1325987A1; EP1325987B1; CN1214160C; DE60107866D1

Abstract

The device is associated with a trench-digger, comprising a cutting disc (2) and a matching prefabricated element feeder that includes a sweeping box (32) with a U-shaped traversal section which is closed in the front by a rake (34) so that no earth can fall inside and means for pushing the matching prefabricated elements (33), comprising push wheels (7) that frictionally transmit a longitudinal push so that the various matching prefabricated elements (33) remain coupled when they are being lowered into the interior of the sweeping box (32). The sweeping box serves as temporary formwork of the trench, said box making it possible to lower and place the matching prefabricated elements in the interior thereof automatically and reliably in an environment free from earth, thereby enabling perfect coupling.

Description

Excavate narrow irrigation canals and ditches and lay the device of the prefabricated units of band joint tongue and notch

The present invention relates to a kind of device and be used for excavating narrow irrigation canals and ditches and lay various prefabricated pipeline within it, straight rigid pipe section constitutes this pipeline by having the weak point that joint tongue and notch can link together.The compacting of laying and being dug material of the excavation of irrigation canals and ditches, pipeline and final polishing are all finished in once-through operation with quickish speed.Device of the present invention was once developed for the auxiliary line that lays high-speed railway, but it also can be used for building power cable and the communication cable and the irrigation ditch etc. in district.

Using the narrow irrigation canals and ditches excavating gear of disk trenching machine is that people are known.The applicant's patent document ES8703560 once illustrated a kind of disk trenching machine that is specially adapted to excavate narrow irrigation canals and ditches on densely, the periphery of employed cutting disc is made by many removable hard metal spike-tooths, because depth of cut by Height Adjustable wheel support on the ground, therefore can be regulated in its chassis.

The another patent document ES2027503 of the applicant once illustrated a kind of device, and this device was once specialized the facility of supporting cable reel and vibration guide wire according to the trenching machine of last patent document explanation and be can be used to cable laying on the irrigation canals and ditches bottom surface and irrigation canals and ditches are excavated and cable laying is carried out equally incessantly.

But all these devices all are intended to be used for to excavate irrigation canals and ditches and the reel that is laid in subsequently on cable, they also are not suitable for being used for laying prefabricated, short and the concrete pipeline section of perfect rigidity.

In case problem is irrigation canals and ditches and scrapes out, must take measures to guarantee not having earth to fall to get back in the irrigation canals and ditches, because this can influence the uniformity of pipeline at irrigation canals and ditches bottom surface upper support, the more important thing is that can influence each pipeline section cooperates and the maintenance level with the correct of next pipeline section.

Patent document US5,707,175 once illustrated and a kind ofly united the device that constitutes by trenching machine and conveying-loader, the suitable pipeline that is used for laying band joint tongue and notch of this device.Its objective is irrigation canals and ditches excavation and pipeline laying can be carried out continuously.Carry loader to contain the pipeline section of some vertically pilings for this reason.There is a mechanical retainer can in time be released in following pipeline section, with a hydraulic piston it is coupled in a notch last pipeline section, that diameter is bigger in the irrigation canals and ditches that are laid in then.Just pipeline section can be dropped to although it is so on the irrigation canals and ditches bottom surface and can not stave the irrigation canals and ditches wall and can guarantee the binding and the watertightness of pipeline, but also bring interrupted basically operation, that is exactly when landing and when promotion, also serious difficulty can take place during in addition when the advanced speed that needs the adjusting trenching machine with to quasi-continuous pipeline section.This device is easy to break and interrupt operation as a result.

To this problem, device of the present invention once was conceived to make the answer that is entirely satisfactory.We are with disk trenching machine and can levelling and contain the facility that digs out earth and particularly clean frame and be contained on the same vehicle for this reason, this cleaning frame is positioned in after the trenching machine, and it is inner and can contain with the earth levelling and by its outside when forming continuous pipeline when the pipeline section that continues is subjected to thrust and is joined together, drops to.So just, can be on the soil of any form, no matter be closely knit or loose, can both excavate the true-to-size irrigation canals and ditches, thereby can prevent that earth in both sides from dropping to the problem that causes on the bottom surface of groove on the pipeline support simultaneously; At that time the bottom surface of groove excavate special polishing, constitute rigid pipe section and be bearing in good ground on the earth.In addition, by means of certain longitudinal thrust, pipeline section is in its front end is lockable and is placed on the cleaning frame, and it shows as showing on the same hinged polygonal face that it departs from for a short time when being tilted.

The inventive system comprises a tractor, a disk trenching machine in its rear concatenated, its cutting width is slightly larger than the width of pipeline section, and its working depth is suitably the height of pipeline section.Because pipeline section must be placed on the horizontal plane in soil, this device has been quoted a bogie wheel and has been supplied the chassis of trenching machine to stop thereon, and this chassis can keep required depth of cut because its height can be conditioned.

Flatly linking an end of roller conveyor in the back of disk trenching machine, the other end of conveyer is supported on the wheel.Pipeline section is placed or is placed by means of fork truck or the loader-digger that is provided with hydraulic grab by manual.The roller conveyor slight inclination make pipeline section can be in level in moving on the plane of longitudinal axis until till dropping in roller promotion machine.This roller promotes machine and not only aims on moving direction, also slight inclination, but inclined degree is reduced to minimum value gradually, at this moment very near level.

Want connected pipeline section to be blocked on roller promotion machine by a plurality of pneumatic actuation wheels, these driving wheels send power to pipeline section by friction compresses them mutually, forces them to enter in the irrigation canals and ditches like this.The slewing rate of driving wheel is variable, and the available tachometer that orders about in the CD-ROM drive motor that their rotate that is located at regulates, and their slewing rate just can be fit to the needs of tractor advanced speed like this.Expect simultaneously and between driving wheel and pipeline section, have some slips, that is to say, the speed that pneumatic capstan should make pipeline section move on the ground with ratio device also wants fast speed to move because the absorbent maximum thrust effect of pipeline section institute be taken turns and pipeline section between friction factor limit.

The cleaning frame is provided with baffle plate in both sides on the height identical with ground, its effect is to distribute the material excavate out that most of material is escape to excavate in the slope, just stays small quantity of material and is used for being filled in side channel between pipeline section and the furrow bank.The cleaning frame comprises also at its rear portion that two levelling scraper plates are used for extending the material that digs out and they is filled in the side channel between pipeline section and the furrow bank, and a plurality of compression rolls are used for compacting and flattening and are filled in the material that digs out in the side channel, and they are pressurizeed downwards and be pressed on the outer wall of pipeline section.

Though Shuo Ming device compared with prior art once made tubine speed be increased to three times just now, required workman's number is kept to half, once detects variety of issue, and these problems can cause the damage and the laying apparatu interrupt operation brokenly at pipeline section edge.

With regard to these problems, first source that difficulty takes place is to use the stopper of swing flatly to carry pipeline section that they are entered into intensive colony in up to first pipeline section with till roller promotion machine contacts.But such first pipeline section can be by the weight of follow-up pipeline section on side direction be blocked and be subjected to the enough big frictional resistance of quantity and moves it and be prevented from and can not arrive first and promote to take turns.Problem hereto, the solution of suggestion are that the conveyer with rotation substitutes the stopper of swinging, and the rotation of this conveyer is step-type, can only discharge a pipeline section at every turn.

Second problem being found is the pipeline section that continues because the not good enough meeting of aligning of side is plugged in roller promotion machine.Pipeline section had enough freedom laterally to move in roller promotion machine if once observed, joint tongue and notch in the termination just can not overlap so, and because whole pipeline section row are subjected to powerful longitudinal thrust, the bead edge that constitutes joint tongue and notch will be subjected to some infringement.The solution of suggestion is that driving wheel is had and the essentially identical width of the centre gangway of pipeline section, so just can guarantee that pipeline section is guided perfectly, and the joint tongue of the pipeline section that continues and notch can be coupled at swimmingly together, do not have any obstruction.

The 3rd detected problem is, when pipeline section is promoted by device of the present invention and lands, they become a small angle along a straight track with ground, in case but they are placed on the ground of irrigation canals and ditches, they can make identical aligning naturally on the ground, like this when their separating devices, the pipeline section that continues side thereon compresses mutually, this zone has breakage in a small amount as a result, though do not influence the works fine order of pipeline, can diminish its outward appearance.The solution of suggestion is impacted and is prevented each direct contact between the pipeline section top of continuing as a means of absorbing for embed the separator made by some soft material between each contact pipeline section.

For the present invention can be understood better, below in conjunction with accompanying drawing preferred embodiment is described in detail, but this is the purpose in order to guide, and must not limit the present invention.In the accompanying drawings:

Fig. 1 illustrates the lateral view of device of the present invention.

Fig. 2 illustrates the plan view of device of the present invention.

Fig. 3 illustrates the phantom drawing of looking on the pipeline section front end.

Fig. 4 illustrates the plan view of the summary of the joint tongue of pipeline section and notch coupling.

Fig. 5 illustrates the lateral view of roller conveyor and stopper thereof.

Fig. 6 illustrates vertical lateral view that roller promotes the summary of machine.

Fig. 7 roughly illustrates the processed continuously plan view of the earth that digs out.

Fig. 8 illustrates the lateral view of the summary that is used for the step-by-step movement Rotatruder in the modifying device.

Fig. 9 illustrates the plan view of modifying device.

Figure 10 illustrates vertical lateral view of the summary that pipeline section lays when embedding separator, is that pipeline enters into the ground state of irrigation canals and ditches from roller promotion machine with the part shown in the broken broken line.

In these accompanying drawings, each label is represented following component and member respectively:

1. tractor

2. cutting disc

3. bogie wheel

4. conveying roller

5. stopper

6. promotion roller

7. driving wheel

8. CD-ROM drive motor

9. drive chain

10. guiding baffle plate

11. levelling scraper plate

12. compression roll

13. deflector

14. chassis

15. power output shaft

16. bevel pinion

17. spike-tooth

18. supporting fork

19. supporting piston

20. wheel fork

21. wheel swivel head

22. wheel shaft

23. thrust spring

24. adjuster nut

25. headless screw

26. roller promotes the machine composite member

27. stopper axle

28. stopper lever

29. shake hands

30. locking device

31. fixed detents

32. cleaning frame

33. the prefabricated pipeline section that has joint tongue and notch element

33 '. middle pipeline section

33 ". the pipeline section contiguous with middle pipeline section

34. inclined plane

35. the swivel head of plate and compression roll

36. the axis of compression roll

38. side channel

39. initial the excavation

40. levelling is excavated

41. compacting is excavated

42. the ledge of lid

43. bead

44. bead groove

51. the stepping conveyer of rotation

52. rotation conveyer dish

53. the central axis of rotation conveyer

54. cellular board arm

55. toothed ratchet

56. bolt pin

57. air impeller

58. switch

59. perceptron

60. separator

61. the pipeline section of band joint tongue and notch

As illustrated in fig. 1 and 2, the inventive system comprises a tractor (1) with large traction power, linking a chassis (14) thereafter, cutting disc (2) is housed on the chassis, its direction that rotatablely moves is opposite with the direction that vehicle advances, power from tractor (1) power output shaft (15) orders about cutting disc (2) rotation by traditional bevel pinion, and a plurality of tungsten carbide spike-tooths are housed around cutting disc.Chassis (14) is shelved on the bogie wheel (3), and this bogie wheel is contained on the supporting fork (18) that rotatably is contained on the chassis (14), and its installation site available hydraulic supporting piston (19) with respect to chassis (14) is regulated.The back of (14) on the chassis, at cutting disc (2) afterwards, be furnished with a plurality of conveying rollers (4), its orientation is vertical with the direction of advance of tractor, come out to come an end of the arrangement of a plurality of promotion rollers (6) formation from conveying roller, these promote roller positions and also recede slightly on the bearing of trend of cutting disc (2).The wheel fork (20) of going up canting at the swing head (21) of this wheel respectively is housed on the side support (26) of its each side, between the wheel fork (20) of both sides, is being equipped with wheel shaft (22), pneumatic actuation wheel (7) is housed on it.Driving wheel (7) is owing to its relevant thrust spring (23) will obviously promote on the roller (6) for vertical power be applied to being compressed between a wheel fork (20) and the adjuster nut (20), this nut (20) is contained on the headless screw (25), and this screw is connected on the side support (26) that promotes roller (6) with the swing head.There is a CD-ROM drive motor (8) that its motion is sent on the driving wheel (7) with drive chain.

It is that stopper (5) and one one end of vertical metal sheet has the stopper lever (28) of shake hands (29) to connect to one to be contained on the stopper axis (27) that one form is arranged in the top of conveying roller (4).A lock (30) is housed below this shakes hands, and this lock is made of two hinge bars, and a wherein short arm can be inserted in the pallet (31) of fixing, and sees Fig. 5.

Below promoting roller (6) and be connected to a cleaning frame (32) of being made by metal sheet is housed on its side support, its cross section is the U font, the front of cleaning frame (32) is sealed with an inclined plane (32), and it act as and prevents that when normally laying pipeline section (33) earth of not arrived in outside the irrigation canals and ditches by disc cutter (2) that digs out from disturbing.

Fixing one group of compression roll (12) at the rear portion of side support (26) by means of swivel head (35) and can freely cross ground around its axis (35) revolving-rolling, also having one group of levelling scraper plate (11), height that can a setting on ground moves.

The function of this device is as follows: pipeline section (33) is according to the gradient on the conveying roller (4), side by side be arranged on the horizontal position, and can move along the direction of arrow, until they are blocked by stopper (5).The workman pulls locking device (30) is disengaged stopper, at this moment stopper frame bar (28) may upwards be swung and be released, stopper (5) just is picked up like this, thereby each pipeline section (33) just can glide along the conveying roller (4) of oblique arrangement, promote till the roller (6) until arrive at, they are being kept by side support (26) there.

Fig. 6 is shown specifically the structure that roller promotes machine.Each pipeline section (33) since the left side of inclination placement meeting in figure of conveying roller move, until till they are driven wheel (7) and block.This driving wheel (7) is owing to be subjected to being provided and by rotatablely moving that drive chain (9) transmits, at the applied thrust of direction shown in the arrow by CD-ROM drive motor (8).Driving wheel (7) blocks pipeline section (33) promoting and regulates on the preload that power available adjustment device nut (24) on the roller (6) acts on driving spring (23).Need depend on the impedance of driving spring and the friction factor between driving wheel (7) and pipeline section (33) surface at the maximum driving force that applies on the pipeline section group in order to force the pipeline section group to be inserted in the irrigation canals and ditches that disc cutter (2) newly digs out.The size of CD-ROM drive motor (8) should be able to produce the also big power of peak power that can transmit than frictional resistance.

The result is because the L shaped bead (43) of each pipeline section front end can be inserted into the corresponding bead notch (44) interior (seeing Fig. 3 and 4) of contiguous pipeline section, and each pipeline section can be interlocked and extruding mutually.

The pipeline section of self interlocking is listed in and is inserted under the pressure and compresses on the pipeline section that is placed in the irrigation canals and ditches, so just can prevent any relative motion between adjacent tubular segments, no matter be vertical, horizontal or longitudinally.

Like this, when each pipeline section stops being supported in when promoting roller (6) and going up, each pipeline section just can not drop in cleaning frame (32) rambunctiously, and the cleaning frame is not because its front by an inclined plane (34) sealing, can have fragmentary earth in it.

In fact the pipeline section that can be followed thereafter of each pipeline section is temporary transient hangs, so just a plurality of pipeline sections have been solved as the problem in whole the irrigation canals and ditches that are laid in, as one whole that is to say as a tubulation section, when the heeling condition on promoting roller (6) changes definite horizontal level into, only be subjected to minimum reversing.

What adopt in the device of the embodiment more excellent with this explanation is two driving wheels (7), because it is found that at the pipeline section that lays specific size two is best number for example during used those pipeline sections of high-speed railway assistant service.

For less pipeline section, as long as a driving wheel (7) is just enough, and for large-sized pipeline section, the number of driving wheel (7) needs to increase.

The excavation that in Fig. 7, roughly is illustrated in irrigation canals and ditches with fill in play each different element of part effect.Irrigation canals and ditches are that the disc cutter (2) with trenching machine excavates, and disc cutter is caught up with the material that digs out forwards and the top, in order that with the deflection piece (13) that is positioned at disc cutter (2) front with the lead both sides of irrigation canals and ditches of above-mentioned material.Deflection piece (13) is a Y shape, and its two arm has different length and departs from the center of disc cutter (2), makes the more material (39) that digs out be directed to a side in the both sides, is the right side of guiding movement direction in this example.The task of guiding baffle plate (10) will initially be dug out in this side and spread out at the material (39) that is accumulated near the irrigation canals and ditches place in a small amount, make that to be placed to the material of another quantity similar to be deflected part (13) at the irrigation canals and ditches opposite side, and the material that suitably major part is initially dug out is removed any distance far away of side direction from irrigation canals and ditches, and the material that digs out that this is removed is the waste material that excavates.

Levelling scraper plate (11) moves on ground with constant height, compression roll (12) along the ground roll extrusion because they are linked on the chassis at same chassis upper support.

Its function be with a small amount of of staying the irrigation canals and ditches both sides initially dig out material transition become to occupy big width, levelling dig out material (40), so just can be filled in the side gap that irrigation canals and ditches are reserved between pipeline section (33) outside (33) and irrigation canals and ditches wall.At last, compression roll (12) with levelling dig out that material (40) does that light and compacting make that they become compacting dig out material (41).

A kind of pipeline section (33) that generally is used for the high-speed railway auxiliary line once was shown in a preferred embodiment.Shown in Fig. 3 and 4, described pipeline section is made by concrete, and cross section is the U font, and open at the top, and every side has a groove to use for lid (42) on it, and pipeline section (33) and inclusion thereof can be covered by a unshowned lid.The expert of this respect when the device that can know the object of the invention thing also applicable to prefabricated rigid conduit the laying in irrigation canals and ditches of any other pattern, for example constitute hollow pipe, have the rectangle periphery, can put into the hollow section of power cable or communication cable later on, whether no matter all imbed in the soil, all available this device lays.

Equally, the expert of this respect knows to also have other forms of embodiment to have prefabricated joint tongue and notch and require to be placed on pipeline section in the irrigation canals and ditches applicable to this.For example the promotion roller group of level can substitute with two groups of rollers at an angle to each other or three groups of driving wheels (7) that are mutually 120 degree easily when laying the cylindrical shape pipeline section.

Fig. 8 and 9 illustrates improved device, and this device has a stepping conveyer (51) that is contained in the rotation on the conveying roller group (4).This conveyer is made of two disks (52) that linked by an axis of centres (53), a plurality of semicircular cellular boards (54) in soldering on each disk, number is preferably six, they be evenly distributed in disk around, the effect of stepping can be played, when discharging a pipeline section, next pipeline section can be held back.On at least one disk (52) a toothed ratchet (52) is housed therein, and has one can be cooperated with it by the latching (56) that air impeller (57) drives.In addition, a switch (58) that is provided with perceptron (59) is arranged, whether this perceptron can detect has a pipeline section (33) to rest on the opened portion that promotes roller (6).

The working condition of this modifying device is as follows.

One group of pipeline section (33) that is placed on the conveying roller (4) is being kept by first pipeline section, because the cellular board (54) of the stepping conveyer (51) of rotation is inserted in the central passage of first pipeline section, latching (56) is stopping band tooth papillae wheel simultaneously, thereby is stopping the rotation of rotation stepping conveyer (51).Be driven wheel (7) when removing when being placed on a last pipeline section that promotes on the roller (6), vacancy appears in the opened portion that promotes roller (6), the perceptron (59) that this situation is installed in the switch (58) on pipeline section (33) side direction detects, the jettron (57) of latching (56) just is driven in a short time it and band tooth papillae wheel (55) is disengaged, this belt transect tooth papillae wheel just allows rotation stepping conveyer to rotate sixth week, because the number of hook tooth is identical with the number of cellular board (54), because this rotation, first pipeline section just moves to from conveying roller (4) and promotes on the roller (6), simultaneously the back with the stepping conveyer (51) that is rotated of each pipeline section keeping.Separator 60 can be placed on each on the top of continuing between the pipeline section at that time, these pipeline sections that continue are driven wheel (7) then and block, guide and promote as mentioned above.Resting on the pipeline section that continues that promotes on the roller (6) so just begins to drop on the ground of irrigation canals and ditches, at this moment in promoting roller (6) zone to the end, owing to leave irrigation canals and ditches ground some height are arranged, always have in the middle of one pipeline section (33 ') be suspended in aerial and (joint of the joint tongue of 33 ") and notch (61) is supporting by contiguous pipeline section.

In this improved embodiment, the lateral contour of driving wheel (7) must be round and mellow as much as possible in case with the almost coupling seamlessly of central passage of pipeline section (33), in order to make driving wheel (7) placed in the middle and leave the vertical wall (32) of cleaning frame (32), must allow pipeline section on side direction, to move.

With regard to separator (60), adopt foamed polystyrene once to obtain good effect, because this material is cheap especially, do not mind even when laying pipeline section, be subjected to permanent deformation yet.The expert of this respect knows that for the pipeline that obtains watertight can use elastomeric material such as rubber as separator, this material can be placed on the joint tongue and notch of pipe in advance when laying the pipe that has prefabricated joint tongue and notch.

Claims

1. be used for excavating narrow irrigation canals and ditches and lay the device of the prefabricated units of band joint tongue and notch, this device is made of conveyer of the prefabricated units of cutting disc (2) and band joint tongue and notch, it is characterized by, and is with the prefabricated units conveyer of joint tongue and notch to comprise:

The cleaning frame (32) that cross section is a U-shaped, its front is sealed by an inclined plane, and is made the earth that digs out can not drop in it by such installation;

Be used for promoting facility with the prefabricated units (33) of joint tongue and notch, this facility has a plurality of driving wheels (7) can pass to these members with longitudinal thrust by being frictionally engaged, and can be used to make these members to keep being coupled at together in the time of in these members are placed on the cleaning frame.

2. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 1, it is characterized by, cutting disc (2) is fitted with a plurality of removable spike-tooths around its periphery, and because the chassis of cutting disc (2) is installed is to rest on the ground with bogie wheel (3), its position available hydraulic supporting piston (19) is regulated, so depth of cut can be conditioned.

3. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 2, it is characterized by, why cutting disc (2) can rotate is because the intermediary supply power of the power output shaft of tractor (1) by bevel pinion (16) is arranged.

4. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 1, it is characterized by, the facility that promotes the prefabricated units of band joint tongue and notch comprises that a plurality of promotion rollers (6) are used for carrying the prefabricated units (33) of described a plurality of band joint tongue and notch, these members are subjected to a plurality of pneumatic actuation wheels (7) and apply downward force thereon and be pressed together, described driving wheel (7) is contained on the wheel shaft (22), a wheel fork (20) also is housed on this wheel shaft, one end of wheel fork is hinged on a wobble wheel (21), therefore wheel fork can swing up and down and canting, the other end of wheel fork and a spring (23) link, spring (23) is located at wheel fork (20) and is contained between the adjuster nut (24) on the headless screw (25), wobble wheel (21) and headless screw (25) all are contained in supporting rotationally and promote on the side support (26) of roller, when spring (23) is compressed and just can promotes wheel fork (20) when rebounding downwards; In addition, driving wheel (7) is accepted from the rotatablely moving of CD-ROM drive motor (8) by drive chain (9), the result, and they can be sent to longitudinal thrust by being frictionally engaged on the prefabricated units (33) of band joint tongue and notch.

5. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 4, it is characterized by, at cutting disc (2) with promote to be provided with between the roller (6) a plurality of conveying rollers (4) that the prefabricated units (33) into band joint tongue and notch use, forms that a direction of advance to device becomes laterally and be the delivery track of inclination.

6. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 5, it is characterized by, near the place of its underpart a stopper (5) is housed on the conveying roller group, it can will rest on the conveying roller (4) these members along the band joint tongue of conveying roller (4) downslide and the prefabricated units block of notch owing to gravity.

7. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 6, it is characterized by, stopper (5) and stopper lever (28) become one and are contained on the stopper axle (27), one end of stopper lever (28) shake hands (29), under shaking hands, this is provided with a locking device that constitutes by two hinged lever (30), a wherein short arm can be inserted into and make stopper lever (28) no longer active in the fixed detents (31), and the prefabricated units of this belt transect joint tongue and notch just can be kept by stopper (5); In case throw off from fixed detents (31) and work as locking device (30), when stopper lever (28) is free to rotate, stopper (5) just can allow to enter on the first promotion roller (6) with the prefabricated units (33) of joint tongue and notch, and they are being kept by side support (26) there.

8. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 5, it is characterized by, the stepping conveyer (51) of a rotation is housed near the place of its underpart on conveying roller group (4), and its prefabricated unit that can only send band joint tongue and a notch can be discharged this member successively each time.

9. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 8, it is characterized by, when this prefabricated units (33) are when having the pipeline section of U-shaped cross-section, the stepping conveyer (51) of rotation can be made of two disks that connected by central axis, on disk, fixing a plurality of cellular boards (54), these cellular boards are evenly distributed on the periphery of disk, and have at least a band tooth papillae wheel (55) to be prevented by latching (56), and latching (56) can be moved by air impeller (57), and driver (57) can be controlled by a switch that is provided with perceptron (59) again.

10. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 9 is characterized by, and driving wheel (7) is for pneumatic and have an identical width of centre gangway with the prefabricated units of being with joint tongue and notch.

11. the device that is used for excavating narrow irrigation canals and ditches and lays the prefabricated units of band joint tongue and notch as claimed in claim 1, it is characterized by, between the prefabricated units of each band joint tongue and notch, all respectively be inserted with the separator (60) made by the lower material of hardness to prevent the direct contact of prefabricated units.