CN204782887U

CN204782887U - Pipe cutter

Info

Publication number: CN204782887U
Application number: CN201520510942.4U
Authority: CN
Inventors: 潘凯
Original assignee: NANJING DILONG TRENCHLESS ENGINEERING Co Ltd
Current assignee: NANJING DILONG TRENCHLESS ENGINEERING Co Ltd
Priority date: 2015-07-15
Filing date: 2015-07-15
Publication date: 2015-11-18
Anticipated expiration: 2025-07-15

Abstract

The utility model provides a pipe cutter for fail because of the construction to non - excavation rig, cause the part and said by the hauling pipe and block the problem that to take out underground, with recycle by parts such as hauling pipe ways. The utility model discloses a pipe cutter includes main shaft cover, dabber, reset spring, cutting sword and connecting axle, dabber and connecting axle are connected on same axis by the bearing, and the suit is in the main shaft cover, reset spring is installed to the dabber other end, the middle part of main shaft cover is equipped with three-six play sword grooves of equalling divide, every goes out the sword inslot and is equipped with a cutting sword, every hold the cutting of sword is established at a sword inslot, what the other end corresponded articulates at the spindle, the dabber can overlap the internal slipping and rotate along with the cover at the main shaft, main shaft cover one end is equipped with the mounting hole and is used for being connected with the drilling rod, the other end is by end cap seal, the connecting axle other end stretches out the end cover.

Description

Pipe cutter

technical field:

The utility model relates to a kind of pipe cutter, for cutting off the plastic conduit be stuck in earth drilling, so that reuse.Be applicable to the underground pipeline project construction fields such as natural gas, coal gas, heating power, electric power, communication, plumbing and cable television.

background technology:

No-dig technique horizontal directional drilling machine is used in not digging mode and carries out underground stringing, and the Construction Principle of horizontal orientation boring is directionally controlled in one, and under the condition of not excavating earth surface, carries out a novel construction method of underground pipeline layout, replacing or reparation.

In existing non-excavating construction, because of failure of constructing, can cannot be taken out by hauling pipe road and parts and discard in underground, cause pipeline to waste, there is no jammed pipeline in good way process construction at present.

summary of the invention:

The utility model for existing no-dig technique rig because of failure of constructing, cause parts and be stuck in the problem cannot taken out underground by hauling pipe road, designing a kind of pipe cutter, for extending into pipeline top from discarded pipe endoporus, cut off pipeline, to reclaim and to re-use by parts such as hauling pipe roads.

The technical solution of the utility model is as follows:

A kind of pipe cutter, comprise collar bush, mandrel, back-moving spring, bite and connecting axle, described mandrel is connected on the same axis with connecting axle by bearing, and be sleeved in collar bush, the mandrel other end is provided with back-moving spring, the middle part of collar bush be provided with three ~ six divide equally go out cutter groove, eachly go out to be provided with a bite in cutter groove, often the cutting end of cutter being located at out in cutter groove, what the other end was corresponding is hinged on mandrel, mandrel can slippage in collar bush, and the bite band moving mandrel of being extracted in cutter groove by main shaft rotates with cover, collar bush one end is provided with installing hole for being connected with drilling rod, the other end is by end cap seal, the connecting axle other end stretches out end cap.

The utility model designs further and is:

Described bite is provided with three, is distributed on same radial section, and is connected on mandrel through bearing pin, and on mandrel, correspondence is often also provided with cutter relieving groove bite.

The cutter groove that goes out on described collar bush is surrounded by the notch on collar bush and block, and this goes out cutter groove and adopts cambered surface to coordinate with bite cooperation place.

Also be provided with between described collar bush and end cap to hold and overlap, described bearing is arranged between mandrel in collar bush and connecting axle, and described bearing adopts single direction thrust ball bearing.

Also be provided with three sliding sleeves in described collar bush and end cover, the first sliding sleeve arranges between collar bush installing hole and back-moving spring, and the second sliding sleeve is located at the collar bush other end; 3rd sliding sleeve is located in end cover.

Described back-moving spring is enclosed within mandrel, and is located by the shaft shoulder of the stepped hole in collar bush and mandrel, and one end that mandrel stretches out back-moving spring is inserted in the first sliding sleeve, and leaves activity surplus.

Described mandrel is multidiameter shaft, and bite is arranged on mandrel maximum gauge.

Mechanical probe is also equipped with in described connecting axle end, and mechanical probe diameter is greater than connecting axle diameter.

In whole design process, collar bush is driving link, and mandrel and cutter hub are Passive parts.

the utility model tool has the following advantages:

1, pipe cutter of the present utility model designs for cutting off the buried plastic conduit in underground, and pipe cutter extend into pipeline top from plastic conduit endoporus, cuts off pipeline by inside, then pull out back the pipeline abandoned from entrance, to reclaim and to reuse.

2, the utility model is applicable to no-dig technique rig because of failure of constructing, the situation causing parts and cannot be taken out by hauling pipe road, is beneficial to the pipeline reclaiming and re-use and be about to abandon, avoids larger material unaccounted-for (MUF) and waste.

3, pipe cutter of the present utility model has structure simply, designs ingenious, feature easy to use.Pipe cutter can become series of products according to different pipe diameter determing.

accompanying drawing illustrates:

Fig. 1 is that the utility model is returned sword the structural representation of state.

Fig. 2 is the structural representation that the utility model goes out knife-like state.

The A-A of Fig. 3 Fig. 1 returns sword sectional view.

Fig. 4 is that the B-B of Fig. 2 goes out cutter sectional view.

In figure: 1-collar bush; 2-first sliding sleeve; 3-mandrel; 4-back-moving spring; 5-bite; 6-bearing pin; 7-block; 8-second sliding sleeve; 9-holds cover; 10-the 3rd sliding sleeve; 11-end cap; 12-connecting axle; 13-mechanical probe; 14-goes out cutter groove; 15-cutter relieving groove; 16-stuck pipe road; Obstruction at the bottom of 17-pipe (in vial transfer gear, pipe cap or other objects do not rotated).B1-soket head cap screw; B2-bullet pad; B3-single direction thrust ball bearing; B4-soket head cap screw; B5-bullet pad; B6-soket head cap screw; B7-bullet pad.

detailed description of the invention:

Below in conjunction with accompanying drawing, the utility model will be further described:

embodiment one:

As shown in Figure 1 and Figure 2, pipe cutter of the present utility model comprises collar bush 1, mandrel 3, back-moving spring 4, bite 5, connecting axle 12, mechanical probe 13, end cover 9 and end cap 11, and wherein bite 5 is provided with three.

Collar bush 1 one end is provided with the installing hole be connected with drilling rod, other end link cover 9, and end cover 9 outer end is sealed by end cap 11.Mandrel 3 is located in collar bush 1, and connecting axle 12 is located in end cover 9, and connecting axle 12 end is stretched out end cap 11 and connected mechanical probe 13, and mandrel 3 is coaxially connected by thrust ball bearing with connecting axle 12.

As shown in Figure 3, Figure 4, three are arranged on the middle part of collar bush 1 bite 5, and are distributed on same radial section, are connected on mandrel 3 by bearing pin 6 simultaneously.On mandrel 3, correspondence is often also provided with cutter relieving groove 15 bite 5, on collar bush 1, correspondence is often provided with out cutter groove 14 bite, go out cutter groove 14 to be surrounded by the notch on collar bush and block 7, block 7 is connected on collar bush 1 through soket head cap screw B1 and bullet pad B2, goes out cutter groove and adopts cambered surface to coordinate with bite cooperation place.

Mandrel 3 can slippage in collar bush 1, compression reseting spring, while slowly stretched out by bite 5, cuts when rotating with cover.After cutting, pipe cutter is returned by drilling rod and drags in pipe, and leave cutting position, back-moving spring 4 starts to reset, and mandrel 3 is reverse slide in collar bush 1, and bite 5 is regained out in cutter groove 14.This goes out cutter groove 14 and adopts cambered surface to coordinate with bite 5 cooperation place, to go out cutter and to return sword freely.Cutter is held when cutter relieving groove 15 is convenient to return sword.

Mandrel 3 adopts multidiameter shaft, and small-bore section of upper suit back-moving spring 4, heavy caliber section installs bite 5.Three sliding sleeves are set in collar bush 1, first sliding sleeve 2 is arranged between the installing hole of collar bush 1 and back-moving spring 4, and mate with small-bore section of mandrel, the second sliding sleeve 8 is arranged on the other end of collar bush 1, place mates with mandrel heavy caliber, arranges the 3rd sliding sleeve 10 and mate with connecting axle in end cover 9.The axiality being set to mandrel 3 and connecting axle 12 of each sliding sleeve provides guarantee, is conducive to their dead axles and slides and rotate.

Back-moving spring 4 is located by the shaft shoulder of the stepped hole (collar bush is provided with small-bore section) in collar bush and mandrel 3, and mandrel 3 one end is stretched out back-moving spring 4 and is inserted in the first sliding sleeve 2, and leaves the activity surplus of mandrel, is convenient to mandrel 3 and slides along cover.Mechanical probe 13 diameter of connecting axle 12 end is greater than connecting axle 12 diameter, is convenient to obstruction 17 at the bottom of touching pipe.

Operating principle of the present utility model is as follows:

In mandrel 3 with collar bush 1 Relative sliding, bite 5 can stretch out from going out cutter groove 14.Connecting axle 12 does not rotate with collar bush 1, its mechanical probe 13 stretching out end cap is encountered obstruction 17 at the bottom of pipe and can be halted, simultaneously by the Compress Spring 4 between mandrel 3 and collar bush, when drilling rod rollback, bite 5, under the effect of return spring force 4, is regained in collar bush 1 voluntarily.

Utilize pipe cutter of the present utility model to stretch to top from inside, stuck pipe road 16, underground, cut off buried pipeline, again pipeline is retracted after cutting off, so that reuse.The pipe cutter of current design is one in series of products, and it is about 150 that its bite 5 can cut internal diameter size after launching, and pipe thickness is less than the plastic conduit of about 40mm.

the operating principle of pipe cutter:

During use, pipe cutter is connected to the head of no-dig technique borer drill rod, the outside dimension of pipe cutter should be less than the internal diameter 10mm of pipeline, by the promotion of drilling rod, stuck pipe road 16 can be stretched into like a cork inner, reach the bosom of pipe interior, (innermost distance is generally understand, and the quantity by drilling rod is calculated) always.When soon reaching bosom, beginning is slowly rotated by drilling rod, all elements in the collar bush 1 of pipe cutter and cover also and then drilling rod advance together and rotate, at this moment bite 5 does not stretch out and does not launch.When the mechanical probe 13 on the connecting axle of pipe cutter front end encounters obstruction, it will not readvance, and also halt with its coaxial mandrel be connected, and due to the effect of thrust ball bearing, connecting axle and mechanical probe 13 no longer rotate, and mandrel rotates as usual.But now collar bush also continues to rotate and advance under the drive of drilling rod, they rotate at this section and have two results in the process of advancing: one is that mandrel in collar bush and cover also can relative motion between them while rotation, and its result makes the back-moving spring of mandrel one end little by little be compressed when their relative motions; Another is in the process of advancing, the bite 5 stayed in collar bush cutter groove is subject to the promotion of collar bush cutter notch, bite can move, but bite cutter head is mounted in the cutter groove of collar bush, the other end is hinged on the bearing pin of mandrel, and mandrel does not move relative to collar bush, bite can only be that axle center is rotated with bearing pin under the promotion of collar bush, as a result, the cutter head of bite is under the constraint of cutter groove and collar bush internal stop 7, from cutter notch slowly stretch out expansion.The cutter head of the bite after expansion by the process rotated from pipeline piecemeal cutting plastic pipe, cut off until whole plastic pipe is cut through.When pipe cutter is return along with drilling rod, its energy can be discharged by the back-moving spring 4 compressed, force collar bush and mandrel relative movement, and bite 5 is by under the pulling back of collar bush block 7, can with the bearing pin on mandrel for axle center rotates, thus cutter head is recovered to fast in collar bush 1, then along with one saves drilling rod and exits plastic pipe.After pipe cutter shifts out, then eradicate out whole from boring for recuperable plastic conduit with equipment.

embodiment two:

Pipe cutter of the present utility model can also be designed to following structure, comprises collar bush 1 and is directly connected with end cap 11, correspondingly saves a sliding sleeve; Connecting axle and mandrel are designed to a bearing, and thrust ball bearing can design between the end of connecting axle 12 and mechanical probe 13; Bite arranges more than three; Back-moving spring can adopt disc spring etc.Other is with embodiment one.

Claims

1. a pipe cutter, is characterized in that: comprise collar bush, mandrel, back-moving spring, bite and connecting axle, and described mandrel is connected on the same axis by bearing with connecting axle, and is sleeved in collar bush, and the mandrel other end is provided with back-moving spring;

The middle part of collar bush be provided with three ~ six divide equally go out cutter groove, eachly go out to be provided with a bite in cutter groove, often the cutting end of cutter is located at out in cutter groove, what the other end was corresponding is hinged on mandrel, mandrel can slippage in collar bush, and the bite band moving mandrel of being extracted in cutter groove by main shaft rotates with cover, and collar bush one end is provided with installing hole for being connected with drilling rod, the other end is by end cap seal, and the connecting axle other end stretches out end cap.

2. pipe cutter according to claim 1, it is characterized in that: described bite is provided with three, be distributed on same radial section, and be connected on mandrel through bearing pin, on mandrel, correspondence is often also provided with cutter relieving groove bite.

3. pipe cutter according to claim 2, it is characterized in that: the cutter groove that goes out on described collar bush is surrounded by the notch on collar bush and block, this goes out cutter groove and adopts cambered surface to coordinate with bite cooperation place.

4. pipe cutter according to claim 3, is characterized in that: be also provided with between described collar bush and end cap to hold and overlap, and described bearing is arranged between mandrel in collar bush and connecting axle, and described bearing adopts single direction thrust ball bearing.

5. pipe cutter according to claim 1,2,3 or 4, is characterized in that: be also provided with three sliding sleeves in collar bush and end cover, the first sliding sleeve arranges between collar bush installing hole and back-moving spring, and the second sliding sleeve is located at the collar bush other end; 3rd sliding sleeve is located in end cover.

6. pipe cutter according to claim 5, is characterized in that: described back-moving spring is enclosed within mandrel, and located by the shaft shoulder of the stepped hole in collar bush and mandrel, one end that mandrel stretches out back-moving spring is inserted in the first sliding sleeve, and leaves activity surplus.

7. pipe cutter according to claim 6, is characterized in that: described mandrel is multidiameter shaft, and bite is arranged on mandrel maximum gauge.

8. pipe cutter according to claim 7, it is characterized in that: mechanical probe is also equipped with in connecting axle end, mechanical probe diameter is greater than connecting axle diameter.