CN110039113B

CN110039113B - Diamond wire saw is at labour pipeline cutting device

Info

Publication number: CN110039113B
Application number: CN201910365218.XA
Authority: CN
Inventors: 宋明; 李旭阳; 曹宇光; 吴琼; 张世华; 史永晋; 徐国强; 孙永泰
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China; Sinopec Shengli Petroleum Engineering Corp
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-13
Anticipated expiration: 2039-04-30
Also published as: CN110039113A

Abstract

The invention discloses an in-service pipeline diamond wire saw cutting device, wherein a wire winding cylinder and guide wheels are sequentially connected with a diamond wire saw, a vertical guide wheel fixing plate, a steering guide wheel fixing plate and a guide wheel plate steering shaft are used for adjusting the cutting direction of the diamond wire saw, the cutting system guide wheel fixing plate is arranged on a track, the track is arranged on the upper part of a base, two groups of pipeline fixing V-shaped blocks which are symmetrically distributed and pipeline outer side fixing bands are arranged on the lower part of the base, a distance adjusting transmission mechanism is arranged between the two cutting system guide wheel fixing plates, a distance adjusting gear is arranged on the distance adjusting transmission mechanism, the distance adjusting gear is connected with two racks, a handle is arranged on the distance adjusting gear, and the distance adjusting. The invention has the advantages that the machine has small volume, is easy to disassemble and carry, can carry out online sampling without stopping working hours on some equipment and pipelines with lower requirements, and basically does not influence the normal operation of the equipment and the pipelines after sampling.

Description

Diamond wire saw is at labour pipeline cutting device

Technical Field

The invention belongs to the technical field of machinery, and relates to a diamond wire saw in-service pipeline cutting device.

Background

In the industries of petroleum, chemical industry and the like, most pipelines and equipment work under high temperature, high pressure and corrosive environment for a long time, the microstructure of the material is degraded and damaged, the mechanical property is reduced, and the failure is easy to occur before the designed service life. How to evaluate and predict the current performance and residual life of the industrial equipment and evaluate the integrity of the structure of the industrial equipment is always a hot spot of domestic and foreign research. At present, the traditional material mechanical property test method has to perform destructive cutting sampling on the in-service equipment, and cannot meet the requirement of nondestructive online detection of the equipment, thereby causing shutdown and causing excessive economic loss. In such a large industrial background, many test methods for mechanical property evaluation using a micro-scale sample have been developed. Small Punch Tests (SPTs) have been developed in recent decades as a nearly non-destructive method of micro-specimen testing to evaluate the degradation of device materials. However, how to cut out the micro-damage test block on the device so as to further prepare the sample for the small punch test is an important problem to be solved at present. At present, the micro-damage sampling devices on the market are mainly divided into two types, namely a mechanical cutting type and an electric spark cutting type. The concept of small punch test was recently proposed, Merchaldi designed the first mechanical spherical shell sampler with a cutter in the form of a "bowl" capable of cutting a block sample with an arcuate cross-section on the surface of the device. However, such a sampling device has the disadvantages of large volume and not suitable for carrying about. Therefore, the mechanical cutting sampler is improved by the company Rolls-Royce, so that the mechanical cutting sampler has smaller external dimension and is convenient to carry. Nevertheless, due to the bowl-shaped feature of the cutting blade, the maximum thickness of the sample taken out by the current mechanical sampling device is still large, which may cause irreparable damage to the device. In addition, in order to improve the cutting precision and minimize the damage to the equipment, the equipment must adopt a very thin bowl-shaped cutter, but the cutter which is too thin is easy to break down when sampling, and the bowl-shaped cutter has a complex shape and high processing cost, so that the overall cost of the sampler is indirectly increased. And the sampling time of the electric spark type sampler is too long, and the cutting efficiency is low. In the cutting process, a large amount of heat generated by electric spark discharge influences the mechanical property of a cut sample and the normal operation of a pipeline, so that in-service equipment cannot be sampled.

Disclosure of Invention

The invention aims to provide a diamond wire saw in-service pipeline cutting device which has the advantages that a pipeline in service is cut by the diamond wire saw, so that the damage to in-service equipment in the cutting process is small, the sampling thickness can be accurately controlled, the heating value during cutting is low, the machine is small in size, easy to disassemble and convenient to carry, online sampling can be carried out when the pipeline and the equipment are not stopped, and the normal operation of the pipeline and the equipment is not influenced basically after sampling.

The technical scheme adopted by the invention is that the device comprises two groups of wire winding cylinders, guide wheels, a vertical guide wheel fixing plate, a steering guide wheel fixing plate and a guide wheel plate steering shaft which are symmetrically arranged and arranged on a cutting system guide wheel fixing plate, a diamond wire saw is sequentially connected with the wire winding cylinders and the guide wheels, the vertical guide wheel fixing plate, the steering guide wheel fixing plate and the guide wheel plate steering shaft are used for adjusting the cutting direction of the diamond wire saw, the cutting system guide wheel fixing plate is arranged on a track, the track is arranged on the upper part of a base, the cutting system guide wheel fixing plate can move along the track, two groups of pipeline fixing V-shaped blocks which are symmetrically distributed and a pipeline outer side fixing band are arranged on the lower part of the base, the positions of the pipeline fixing V-shaped blocks can be adjusted, the base is in close contact with the outer wall of a pipeline, the pipeline outer, the base is firmly fixed on the outer wall of the pipeline, the distance adjusting transmission mechanism is installed between the two guide wheel fixing plates of the cutting system, the distance adjusting transmission mechanism is provided with a distance adjusting gear, the distance adjusting gear is connected with the two racks, the distance adjusting gear is provided with a handle, and the distance adjusting gear is screwed through the handle to drive the two racks to move relatively.

Further, the pipeline outer side fixing belt is made of leather or steel chains.

Further, the guide wheel fixing plate of the cutting system is connected with a lead screw on the motor, the motor is started, and the guide wheel fixing plate of the cutting system is driven to reciprocate along the guide rail through the lead screw.

Furthermore, a cooling water channel is further arranged on the base and connected with the nozzle, cooling water is sprayed out of the nozzle through the cooling water channel, and the cutting part is washed and cooled in the pipeline cutting process.

Furthermore, the guide wheel fixing plate of the whole cutting system is reinforced by a triangular fixing support.

Drawings

FIG. 1 is a schematic structural diagram of a diamond wire saw pipe cutting device;

FIG. 2 is a side view of a diamond wire saw pipe cutting apparatus;

fig. 3 is a perspective view of a diamond wire saw pipe cutting device.

In the figure, 1, a wire winding barrel, 2, a guide wheel, 3, a guide wheel plate steering shaft, 4, a rail, 5, a base, 6, a cutting system guide wheel fixing plate, 7, a distance adjusting transmission mechanism, 8, a distance adjusting gear, 9, a diamond wire saw, 10, a cooling water channel, 11, a vertical guide wheel fixing plate, 12, a steering guide wheel fixing plate, 13, a pipeline fixing V-shaped block, 14, a pipeline outer fixing belt, 15, a pipeline, 16, a motor, 17, a lead screw, 18, a triangular fixing bracket, 19, a rack and 20, a nozzle.

Detailed Description

The present invention will be described in detail with reference to the following embodiments.

The invention discloses a diamond wire saw in-service pipeline cutting device which comprises two groups of wire winding cylinders 1, guide wheels 2, a vertical guide wheel fixing plate 11, a steering guide wheel fixing plate 12 and a guide wheel plate steering shaft 3 which are symmetrically arranged and installed on a cutting system guide wheel fixing plate 6, wherein a diamond wire saw 9 is sequentially connected with the wire winding cylinders 1 and the guide wheels 2, the vertical guide wheel fixing plate 11, the steering guide wheel fixing plate 12 and the guide wheel plate steering shaft 3 are used for adjusting the cutting direction of the diamond wire saw 9, the cutting system guide wheel fixing and cutting plate 6 is installed on a rail 4, the rail 4 is installed on the upper portion of a base 5, and the cutting system guide wheel fixing plate 6 can move along the rail 4. Two groups of pipeline fixing V-shaped blocks 13 and pipeline outer fixing belts 14 which are symmetrically distributed are arranged at the lower part of the base 5. The position of the pipeline fixing V-shaped block 13 can be adjusted according to actual conditions (different pipe diameters and the like), so that the base 5 is in close contact with the outer wall of the pipeline 15, the pipeline outer side fixing band 14 can be made of leather or a steel chain, penetrates through a preformed hole of the pipeline fixing V-shaped block 13 on one side, penetrates through the lower part of the pipeline 15 with cutting and is connected to the pipeline fixing V-shaped block 13 on the other side, and the base 5 is firmly fixed on the outer wall of the pipeline 15. Distance adjustment drive mechanism 7 is installed between two cutting system guide pulley fixed plates 6, and distance adjustment drive mechanism 7 is equipped with apart from adjustment gear 8, connects two racks 19 apart from adjustment gear 8, is equipped with the handle on the distance adjustment gear 8, twists distance adjustment gear 8 through the handle, drives two racks 19 and is relative motion, finally reaches the purpose of adjustment diamond wire saw 9 length, has avoided too big tension in cutting process, and diamond wire saw 9 is probably taken place to collapse and breaks, causes danger. The distance between the guide wheels 2 (the length of the cutting part of the diamond wire saw) is adjusted by the distance adjusting gear 8 on the distance adjusting transmission mechanism 7 according to the diameter of the pipeline 15, reciprocating cutting of the diamond wire saw 9 is achieved through rotation of the wire winding barrel 1, and the distance can be adjusted in real time according to the tension of the diamond wire saw 9 in the cutting process, so that the diamond wire saw 9 is always in a safe state and cannot be broken. The cutting system guide wheel fixing plate 6 is connected with a lead screw 17 on a motor 16, the motor 16 is started, and the cutting system guide wheel fixing plate 6 is driven to reciprocate along the guide rail 4 through the lead screw 17. The base 5 is also provided with a cooling water channel 10, the cooling water channel 10 is connected with a nozzle 20, cooling water is sprayed out from the nozzle 20 through the cooling water channel 10, and the pipeline 15 is washed and cooled in the cutting process. The guide wheel fixing plate 6 of the whole cutting system can also be reinforced by a triangular fixing bracket 18.

Cutting process: the pipe diameter is measured at first, and the distance of the guide wheel 2 is adjusted, so that only the diamond wire saw 9 is in contact with the pipe wall when cutting is guaranteed, and the guide wheels 2 on two sides are prevented from being in contact with the pipe wall, and the pipe cannot be cut. The size of the required material is calculated in advance, and marks are made on the outer wall of the pipeline to prepare for the start and the end of cutting. The total length of the diamond wire saw 9 is determined according to the field situation, and the diamond wire saw 9 can be cooled sufficiently when cutting. After the diamond wire saw 9 is wound, the "tool setting" is started to align the diamond wire saw 9 with the position where the cutting is started. First, a groove is cut by cutting downward in a direction perpendicular to the transport direction of the pipe 15. In the cutting process, the diamond wire saw 9 can deform, the distance between the guide wheels 2 is adjusted, the tension of the diamond wire saw 9 is adjusted, and the breakage is prevented. In the latter half stage of cutting the groove, the tension of the diamond wire saw 9 is properly increased to be a straight line as much as possible, the lower end of the cut groove is a plane as much as possible, and the damage to the pipeline 15 is reduced. When the groove is cut to a required depth, the cutting direction of the diamond wire saw 9 is changed by the guide wheel plate steering shaft 3 and the steering guide wheel fixing plate 12, so that the diamond wire saw can horizontally cut along the conveying direction of the pipeline 15 and can not cut to the guide wheel 2. The cut length needs to be controlled well at this time, so that the test requirements are met, the cut length is reduced as much as possible, and the damage to the pipeline 15 is reduced. In the latter half of the horizontal cutting, the tension of the diamond wire saw 9 should be increased appropriately so as to cut a plane as much as possible. When the desired length is cut, the same is oriented by the idler plate steering shaft 3 and the steered idler plate 12 to begin cutting upward perpendicular to the direction of travel of the pipe 15, cutting the entire piece of material. In the cutting process, the cutting part can be cooled by using cooling water if needed, so that the temperature of the cutting part is always kept at the ambient temperature, and the thermal influence of the temperature on a cut sample is avoided. After the cutting is completed, the whole device can be detached.

Compared with a conventional mechanical sampler and an electric spark type sampler, the speed of cutting steel by the diamond wire saw 9 is higher, the yield is greatly improved, and the cutting thickness can be accurately controlled. The whole set of device is simple to operate, does not need professional training personnel to work on site, is convenient to install and disassemble, and can be used for operating in severe environment areas. And the diamond wire saw is used for processing the pipeline, so that the pipeline is very slightly damaged. Micro-damage sampling work can be performed on the pipeline with the thin pipe wall by utilizing the thinner wire saw.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a diamond wire saw is pipeline cutting device in labour which characterized in that: the cutting system guide wheel fixing plate is arranged on a rail, the rail is arranged on the upper part of a base, the cutting system guide wheel fixing plate can move along the rail, two groups of symmetrically distributed pipeline fixing V-shaped blocks and pipeline outer side fixing bands are arranged on the lower part of the base, the positions of the pipeline fixing V-shaped blocks can be adjusted to enable the base to be in close contact with the outer wall of a pipeline, the pipeline outer side fixing bands penetrate through a pipeline fixing V-shaped block reserved hole on one side of the pipeline to be cut, pass through the lower part of the pipeline to be cut and are connected to a pipeline fixing V-shaped block on the other side, the base is firmly fixed on the outer wall of the pipeline, the distance adjusting transmission mechanism is installed between the two guide wheel fixing plates of the cutting system, the distance adjusting transmission mechanism is provided with a distance adjusting gear, the distance adjusting gear is connected with the two racks, the distance adjusting gear is provided with a handle, and the distance adjusting gear is screwed through the handle to drive the two racks to move relatively.

2. The in-service pipe cutting device for the diamond wire saw as set forth in claim 1, wherein: the pipeline outer side fixing belt is made of leather or steel chains.

3. The in-service pipe cutting device for the diamond wire saw as set forth in claim 1, wherein: the cutting system guide wheel fixing plate is connected with a lead screw on the motor, the motor is started, and the lead screw drives the cutting system guide wheel fixing plate to reciprocate along the guide rail.

4. The in-service pipe cutting device for the diamond wire saw as set forth in claim 1, wherein: still be equipped with the cooling water passageway on the base, the nozzle is connected to the cooling water passageway, and the cooling water is through cooling water passageway from the nozzle blowout, washes the cooling at the pipeline cutting in-process.

5. The in-service pipe cutting device for the diamond wire saw as set forth in claim 1, wherein: the guide wheel fixing plate of the whole cutting system is reinforced through a triangular fixing support.