阅读说明：本技术 一种前混式高压磨料射流管道切割装置 (Front mixing type high-pressure abrasive jet flow pipeline cutting device ) 是由 刘为民 牟宗浩 李罗鹏 刘立潜 宋元新 周卫东 王健 王永庆 张艳 崔红颖 李桂 于 2020-06-15 设计创作，主要内容包括：一种前混式高压磨料射流管道切割装置,包括高压供水系统、前混式高压磨料射流调制系统、链条式切割系统、液压站、控制系统；高压供水系统与前混式高压磨料射流调制系统之间连接有高压清水管线；前混式高压磨料射流调制系统与链条式切割系统之间连接有高压磨料浆体管线；链条式切割系统与液压站之间连接有液压马达驱动液压管线以及液压缸驱动液压管线。本发明采用前混式磨料射流切割,同等工况下,切割效率大幅优于后混式切割工艺；切割系统可适应不同直径与不同壁厚的管道切割,作业范围较宽,特别适用于油气集输站各类管道的切割施工。(A front-mixing type high-pressure abrasive jet flow pipeline cutting device comprises a high-pressure water supply system, a front-mixing type high-pressure abrasive jet flow modulation system, a chain type cutting system, a hydraulic station and a control system; a high-pressure clean water pipeline is connected between the high-pressure water supply system and the front mixing type high-pressure abrasive jet modulation system; a high-pressure abrasive slurry pipeline is connected between the front mixing type high-pressure abrasive jet flow modulation system and the chain type cutting system; a hydraulic motor driving hydraulic pipeline and a hydraulic cylinder driving hydraulic pipeline are connected between the chain type cutting system and the hydraulic station. The front-mixing abrasive jet cutting is adopted, and under the same working condition, the cutting efficiency is greatly superior to that of a rear-mixing cutting process; the cutting system can be suitable for cutting pipelines with different diameters and different wall thicknesses, has a wide operation range, and is particularly suitable for cutting construction of various pipelines of an oil and gas gathering and transportation station.)

1. The utility model provides a preceding formula high pressure abrasive material efflux pipeline cutting device that mixes which characterized in that: comprises a high-pressure water supply system (1), a front-mixing type high-pressure abrasive jet modulation system (2), a chain type cutting system (3), a hydraulic station (4) and a control system (5); a high-pressure clean water pipeline (1-7) is connected between the high-pressure water supply system (1) and the front mixing type high-pressure abrasive jet modulation system (2); a high-pressure abrasive slurry pipeline (2-7) is connected between the front mixing type high-pressure abrasive jet modulation system (2) and the chain type cutting system (3); a hydraulic motor driving hydraulic pipeline (4-1) and a hydraulic cylinder driving hydraulic pipeline (4-2) are connected between the chain type cutting system (3) and the hydraulic station (4); the chain type cutting system (3) is bound on a cut pipeline (6) through a crawling chain (3-1); the control system (5) is connected with the hydraulic cylinder (3-9) and used for adjusting the binding force between the crawling chain (3-1) and the cut pipeline (6).

2. The front-mixed high pressure abrasive jet pipe cutting apparatus of claim 1, wherein: the control system (5) regulates the rotational speed of the hydraulic motor (3-10).

3. The front-mixed high pressure abrasive jet pipe cutting apparatus of claim 1, wherein: the high-pressure water supply system comprises a water tank, a water return pipeline, a low-pressure valve, a low-pressure water supply pipeline, a high-pressure pump, a high-pressure tee joint and a high-pressure clean water pipeline.

4. The front-mixed high pressure abrasive jet pipe cutting apparatus of claim 1, wherein: the front mixing type high-pressure abrasive jet modulation system comprises a sand valve switch handle, a supporting frame, a high-pressure abrasive tank, a feed inlet plug, a feed inlet switch handle, a high-pressure mixing cavity and a high-pressure abrasive slurry pipeline.

5. The front-mixed high pressure abrasive jet pipe cutting apparatus of claim 1, wherein: the hydraulic station comprises a hydraulic motor driven hydraulic line and a hydraulic cylinder driven hydraulic line (4-2).

6. The front-mixed high pressure abrasive jet pipe cutting apparatus of claim 5, wherein: the device also comprises a motor, a breather valve, a cooler and a hydraulic pump.

Technical Field

The invention relates to a pipeline cutting device in the field of maintenance of oil-gas gathering and transportation devices, in particular to a front-mixing type high-pressure abrasive jet pipeline cutting device and a using method thereof.

Background

With the continuous expansion of the scale of oilfield capacity construction, the construction amount of ground infrastructure is increased, and particularly for the reconstruction and extension in a gathering and transportation station, the oil and gas pipeline needs to be maintained, a bypass is additionally connected, a valve is installed, and the like. In the construction process, the pipeline is required to be cut firstly, and at present, the domestic cutting mode for the oil and gas pipeline mainly comprises mechanical cutter cutting, acetylene flame spray gun cutting and the like, wherein the acetylene flame spray gun cutting mode is most widely applied and has the advantages of simple operation, high cutting efficiency and the like; mechanical cutter cutting has degree of automation height, cutting accuracy advantage such as high, but above-mentioned two kinds of modes all have naked light and local high temperature in cutting process, often remain in the oil and gas pipeline and have easily inflammable and explosive gas, in case sweep the line in earlier stage, wash etc. thoroughly, the tempering phenomenon will appear in the work progress, there is very big potential safety hazard, simultaneously, the cutting quality of acetylene flame spray gun cutting mode is easily restricted by operating personnel skill, consequently, construction quality is difficult to guarantee.

In recent years, a cold cutting technology of abrasive jet cutting is developed in China, cold cutting is performed on a pipeline, the cold cutting technology has no thermal influence problems such as thermal deformation and thermal hardening, more importantly, open fire and local high temperature do not exist in the cutting process, the possibility of fire burning and detonation to the surrounding environment is eliminated, and the abrasive jet cutting device is particularly suitable for cutting operation in flammable and explosive occasions such as chemical plants, oil refineries, coal mines and the like.

In the field of automatic cutting of steel pipes, a hand-operated steel pipe cutting machine is low in manufacturing cost and low in price, but has the defects of uneven hand-operated speed and rough cutting; in the process of rotating the cutting machine around the pipe, the cutting machine is not easy to be operated by hand in many positions, such as the top surface, the bottom surface and the like; the flame can not be closed in time when an emergency occurs in the middle of cutting; the walking track is limited by the chain, so that the defects of inaccurate positioning, insufficient cutting precision, poor cutting opening, welding repair or repair cutting of the steel pipe and the like are caused.

The magnetic automatic pipeline cutting machine uses the magnetic trolley as a walking machine, realizes automatic cutting and has higher efficiency. However, under the condition that the ovality of the steel pipe is not good, the magnetic trolley walks along the pipe wall, the walking path is changed, and particularly, the ovality of the welded steel pipe with large caliber is difficult to keep good, and the cutting effect is not good; under the conditions that a coating or a heat-insulating layer is arranged on the surface, the magnetic force is reduced, the dead weight cannot be overcome, and the magnetic force cannot work; when a seamed pipe, particularly a spiral pipe is cut, the magnetic walking track changes, and the magnetic trolley easily falls off or the wheels of the walking mechanism are deviated due to bumping at the position of a seam passing through the spiral pipe; non-magnetic pipelines such as stainless steel and the like cannot be cut; when the magnetic cutting machine is placed on a pipe, the parallelism of a cutting machine body and the end face of the pipe is difficult to guarantee, the walking deviation is inevitable, the pipe diameter is large, the deviation is large, therefore, the line is often drawn firstly, the cutting process is monitored by workers in real time, the deviation occurs, manual intervention is carried out again, the working hours are wasted, and meanwhile, the problems of quality cannot be thoroughly guaranteed and the like. Aiming at the defect that the magnetic force type can fall, a manufacturer can be externally provided with a fixed chain and other mechanisms, but still cannot solve the problem of loss of cutting precision caused by pipe diameter errors and ellipse errors.

The traditional chain type automatic cutting machine overcomes the defects in the cutting process of the traditional automatic cutting machine and overcomes partial defects of a manual chain type cutting machine, but the traditional chain type automatic cutting machine still has fatal defects. Such as:

a gap is formed between the chain sections, and the chain is used as a track, so that the cutting precision is difficult to ensure. The larger the caliber of the steel pipe is, the larger the error is; the chain needs to be installed one by one, the chain is loose in the installation process, the installed chain link is easy to fall off, the installation is time-consuming and labor-consuming, and the defects are easy to aggravate.

Compared with the chain type abrasive jet flow pipeline cutting device simultaneously submitted by the applicant, the chain type abrasive jet flow pipeline cutting device belongs to different series of products, and meanwhile focuses more on defining the structure of the product from the using method and protecting the series of products through different angle definitions.

Disclosure of Invention

The invention aims to provide a front mixing type high-pressure abrasive jet flow pipeline cutting device aiming at the defects in the prior art.

The invention relates to a front mixing type high-pressure abrasive jet flow pipeline cutting device. The technical scheme is as follows: the device consists of a high-pressure water supply system, a front mixing type high-pressure abrasive jet flow modulation system, a chain type cutting system, a hydraulic station and a control system; a high-pressure clean water pipeline is connected between the high-pressure water supply system and the front mixing type high-pressure abrasive jet modulation system; a high-pressure abrasive slurry pipeline is connected between the front mixing type high-pressure abrasive jet flow modulation system and the chain type cutting system; a hydraulic motor driving hydraulic pipeline and a hydraulic cylinder driving hydraulic pipeline are connected between the chain type cutting system and the hydraulic station; the chain type cutting system is bound on the cut pipeline through a crawling chain; the control system is used for adjusting the extension and contraction of the piston rod of the hydraulic cylinder so as to adjust the binding force between the crawling chain and the cut pipeline; meanwhile, the control system is also used for adjusting the rotating speed of the hydraulic motor, so that the advancing speed of the chain type cutting system is adjusted.

Preferably, the high-pressure water supply system comprises a water tank, a water return pipeline, a low-pressure valve, a low-pressure water supply pipeline, a high-pressure pump, a high-pressure tee joint and a high-pressure clean water pipeline.

Preferably, the front mixing type high-pressure abrasive jet modulation system is composed of a sand valve switch handle, a supporting frame, a high-pressure abrasive tank, a feed inlet pipe plug, a feed inlet switch handle, a high-pressure mixing cavity and a high-pressure abrasive slurry pipeline.

Preferably, the chain type cutting system is composed of a crawling chain, a crawling driving chain wheel, a roller, a rotating shaft outside a tensioning hinge, a tensioning rod, a hydraulic cylinder fixing rod, a rotating shaft inside the tensioning hinge, a hinge main shaft, a hydraulic cylinder, a hydraulic motor, a driving wheel, a driving chain, a driven wheel, a crawling chain wheel main shaft, a spray rod locking screw, a spray rod sleeve, a spray rod, a roller bearing, a base and a cutting nozzle.

Preferably, the hydraulic station mainly comprises a hydraulic motor driving hydraulic pipeline and a hydraulic cylinder driving hydraulic pipeline (4-2), and other components such as an electric motor, a breather valve, a cooler, a hydraulic pump and the like are all hydraulic standard elements.

The invention has the beneficial effects that: the front mixing type abrasive jet cutting is adopted, and under the same working condition, the cutting efficiency is greatly superior to that of a rear mixing type cutting process; the chain type cutting system can be suitable for cutting pipelines with different diameters and different wall thicknesses, has a wide operation range, and is particularly suitable for cutting construction of various pipelines of an oil-gas gathering station.

Drawings

FIG. 1 is a schematic view of the cutting apparatus of the present invention in its entirety during use;

FIG. 2 is a schematic diagram of the high pressure water supply system;

FIG. 3 is a schematic diagram of the front-mixing high-pressure abrasive jet modulation system;

FIG. 4 is a side view of the chain cutting system;

FIG. 5 is a front view of the chain cutting system;

fig. 6 is a schematic structural diagram of the hydraulic station.

The reference numbers are as follows: the device comprises a high-pressure water supply system 1, a front mixing type high-pressure abrasive jet flow modulation system 2, a chain type cutting system 3, a hydraulic station 4, a control system 5 and a cut pipeline 6.

1-1 parts of water tank, 1-2 parts of water return pipeline, 1-3 parts of low-pressure valve, 1-4 parts of low-pressure water supply pipeline, 1-5 parts of high-pressure pump, 1-6 parts of high-pressure tee joint and 1-7 parts of high-pressure clean water pipeline.

2-1 parts of sand valve switch handle, 2-2 parts of supporting frame, 2-3 parts of high-pressure abrasive tank, 2-4 parts of charging opening plug, 2-5 parts of charging opening switch handle, 2-6 parts of high-pressure mixing cavity and 2-7 parts of high-pressure abrasive slurry pipeline.

3-1 parts of crawling chain, 3-2 parts of crawling driving chain wheel, 3-3 parts of roller, 3-4 parts of outer rotating shaft of tensioning hinge, 3-5 parts of tensioning rod, 3-6 parts of hydraulic cylinder fixing rod, 3-7 parts of inner rotating shaft of tensioning hinge, 3-8 parts of hinge main shaft, 3-9 parts of hydraulic cylinder, 3-10 parts of hydraulic motor, 3-11 parts of driving wheel, 3-12 parts of driving chain, 3-13 parts of driven wheel, 3-14 parts of crawling chain wheel main shaft, 3-15 parts of spray rod locking screw, 3-16 parts of spray rod sleeve, 3-17 parts of spray rod, 3-18 parts of roller bearing, 3-19 parts of base bearing, 3-20 parts of base and 3-21 parts of cutting nozzle.

The hydraulic motor drives the hydraulic pipeline 4-1, and the hydraulic cylinder drives the hydraulic pipeline 4-2.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustration and explanation and are not intended to limit the present invention.

Referring to the attached figure 1, the invention provides a front mixing type high-pressure abrasive jet flow pipeline cutting device, which adopts the technical scheme that: the device consists of a high-pressure water supply system 1, a front mixing type high-pressure abrasive jet modulation system 2, a chain type cutting system 3, a hydraulic station 4 and a control system 5; a high-pressure clean water pipeline 1-7 is connected between the high-pressure water supply system 1 and the front mixing type high-pressure abrasive jet modulation system 2; a high-pressure abrasive slurry pipeline 2-7 is connected between the front mixing type high-pressure abrasive jet modulation system 2 and the chain type cutting system 3; a hydraulic motor driving hydraulic pipeline 4-1 and a hydraulic cylinder driving hydraulic pipeline 4-2 are connected between the chain type cutting system 3 and the hydraulic station 4; the chain type cutting system 3 is bound on a cut pipeline 6 through a crawling chain 3-1; the control system 5 is used for adjusting the extension and contraction of a piston rod of the hydraulic cylinder 3-9 so as to adjust the binding force of the crawling chain 3-1 and the cut pipeline 6; meanwhile, the control system 5 is also used for adjusting the rotating speed of the hydraulic motors 3-10 so as to adjust the advancing speed of the chain type cutting system 3.

Referring to attached drawings 1, 4 and 5, an outer rotating shaft 3-4 of a tensioning hinge, an inner rotating shaft 3-7 of the tensioning hinge, a tensioning rod 3-5, a hydraulic cylinder fixing rod 3-6, a hinge main shaft 3-8 and a hydraulic cylinder 3-9 form a complete hinge mechanism, wherein the hinge main shaft 3-8 is taken as a rotation center, the outer rotating shaft 3-4 of the tensioning hinge and the inner rotating shaft 3-7 of the tensioning hinge can rotate within a certain angle under the pushing of the hydraulic cylinder 3-9, the distance between a crawling driving chain wheel 3-2 and a cut pipeline 6 is changed, and further the binding force of the crawling chain 3-1 on the cut pipeline 6 is changed, so that the whole chain type cutting system 3 can be stably fixed on the cut pipeline 6 to prevent the complete chain type cutting system from falling and sliding, and the phenomenon that the crawling driving chain wheel 3-2 cannot be meshed with the crawling chain 3-1 to transport due to overlarge binding force can be prevented Moving; the tail ends of the outer rotating shaft 3-4 and the inner rotating shaft 3-7 of the tensioning hinge are respectively provided with a roller 3-3, and in order to reduce rolling resistance, two roller bearings 3-18 are arranged in each roller 3-3; the main shaft 3-14 of the crawling chain wheel is rigidly connected with the driven wheel 3-13, and is arranged on a base 3-20 through a base bearing 3-19, the hydraulic motor 3-10 is also arranged on the base 3-20, an output shaft of the hydraulic motor 3-10 is rigidly connected with the driving wheel 3-11, then the driven wheel 3-13 is driven to rotate through the driving chain 3-12, and the crawling driving chain wheel 3-2 is further driven, and finally the whole set of chain type cutting system 3 is driven to move circumferentially around the cut pipeline 6 along a track formed by the crawling chain 3-1; the spray rods 3-17 are arranged in the spray rod sleeves 3-16 and are fixed through spray rod locking screws 3-15, one ends of the spray rods 3-17 are connected with high-pressure abrasive fluid pipelines 2-7, and the other ends are provided with cutting nozzles 3-21.

The use method of the front mixing type high-pressure abrasive jet flow pipeline cutting device comprises the following processes:

referring to the attached drawings 1 and 6, a high-pressure water supply system 1, a front mixing type high-pressure abrasive jet modulation system 2, a chain type cutting system 3, a hydraulic station 4 and a control system 5 are connected, and the chain type cutting system 3 is fixed on a cut pipeline 6; the hydraulic station 4 is started, the oil pressure in the hydraulic cylinder driving hydraulic pipeline 4-2 is controlled through the control system 5, the oil circuit of the hydraulic motor driving hydraulic pipeline 4-1 is started at the same time, the hydraulic motor 3-10 is driven to run, the binding force of the crawling chain 3-1 is checked, if the crawling driving chain wheel 3-2 is difficult to rotate, the oil pressure in the hydraulic cylinder driving hydraulic pipeline 4-2 is properly reduced, otherwise, the oil pressure is increased until the chain type cutting system 3 can freely move circumferentially around the cut pipeline 6 along the track formed by the crawling chain 3-1.

Referring to fig. 2 to 6, before the cutting operation, the water tank 1-1 is filled with clear water; removing the feed inlet pipe plug 2-4 through a feed inlet switch handle 2-5, adding cutting abrasive into a high-pressure abrasive tank 2-3, and then installing and returning the feed inlet pipe plug 2-4; opening a low-pressure valve 1-3 and starting a high-pressure pump 1-5, sucking clear water into a water tank 1-1 by the high-pressure pump 1-5 through a low-pressure water supply pipeline 1-4 and pressurizing, adjusting a high-pressure tee joint 1-6 to a construction set pressure, enabling the high-pressure clear water to enter a high-pressure mixing cavity 2-6 through a high-pressure clear water pipeline 1-7, opening a sand valve switch handle 2-1, mixing the high-pressure clear water and abrasive in the high-pressure mixing cavity 2-6 to form high-pressure abrasive slurry, controlling the volume fraction of the abrasive by the flow channel throttling characteristic in the mixing cavity 2-6, conveying the mixed high-pressure abrasive slurry to a spray rod 3-17 through the high-pressure abrasive slurry pipeline 2-7, forming high-speed abrasive jet by a nozzle 3-21 at the tail end of the spray rod 3-17, and cutting the cut pipeline 6, the cutting speed is adjusted by the control system 5 changing the rotational speed of the hydraulic motors 3-10. After the cutting operation is finished, the hydraulic motor 3-10 is turned off, the sand valve switch handle 2-1 is turned off at the same time, the operation is carried out for 1-2 min only by using clean water, the high-pressure pump 1-5 is turned off after the high-pressure abrasive slurry pipeline 2-7 and abrasive materials remained in the spray rod 3-17 are cleaned, the piston rod of the hydraulic cylinder 3-9 is retracted at the same time, and the crawling chain 3-1 is removed. And repeating the above processes to complete the cutting operation of the next position.

The above description is only a part of the preferred embodiments of the present invention, and the flexibility can be implemented on the basis of the above description, for example, the hydraulic motors 3-10 can be replaced by low-speed motors; the crawling chain 3-1 can be a single-row chain, a double-row chain or a multi-row chain; the hydraulic cylinders 3-9 can be replaced by large-rigidity springs and the like which can adjust the tension force. Any person skilled in the art may modify the above-described embodiments or modify them to equivalent solutions. Therefore, any simple modifications or equivalent substitutions made in accordance with the embodiments of the present invention are within the scope of the claims of the present invention.