Internal hydraulic centering mount

FIELD: construction engineering; erection of main pipe lines.

SUBSTANCE: proposed centering mount is provided with four-wheel bogie, electric pump, electrohydraulic control mechanism with hydraulic locks, centering mechanism made in form of two opposing coaxial hydraulic cylinders with spacer cones on rods and pushers and pressing units located radially in centering mechanism housing, planetary hydraulic motor and reversible electrohydraulic distributor. Electric pump outlet is connected via reversible electrohydraulic distributor with planetary hydraulic motor whose outlet is connected with front wheels of bogie through drive axle by means of right-hand and left-hand universal joints.

EFFECT: extended field of application.

1 dwg

 

The invention relates to mechanical engineering and can be used in pipelines for internal concentrations Assembly and subsequent external welding of oil and gas pipelines of large diameter.

Known internal hydraulic centralizers CSP (CVP), CV, CW, CW, CW [1-4]made in Poland [1], as well as plants of the CIS KEMZ "welding" (, Kiev) [2], CRS (gcroots) [3], Cams (homeschoo) [4], intended for construction (welding) of trunk pipelines with a diameter of 1420 mm, 1220 mm 1020 mm, 720-830 mm, 530-640 mm, respectively, designed in SKB "Gastroinestinal" [5].

These units contain a centering mechanism made in the form of two counter-coaxial cylinders with spacer cones on the rod and radially accommodated in the housing of the centering mechanism tappets with jimkami, four-wheeled cart and the hydraulic control mechanism with hydraulic locks connected to the output of the pump.

For welding the next junction mentioned centralizers, in addition to the CCS P (index "C" means a self-propelled"), luxirous for the bar cart to the open end of the pipeline, after which the pump is connected to the welding unit 70 V, the rear row of gemkow relaxes, roots and fixies due to hydraulic locks inside a pipeline on the rod is attached a section of the pipe, e is ectronics again connected via the cable rod to the welding unit, the front row of gemkow expands aligning joint, and held his lock inside the joint during welding. After welding on the cable to open hidrotambo control mechanism, the liquid under the action of springs is drained from the piston cavities of the hydraulic cylinders to the tank, the centering mechanism is released, and the centralizer towed the truck to the new interface. The upper (rear) support roller bogie spring-loaded, pressing the rear wheels in contrast to the tow bar.

The closest in technical essence and the present invention (the prototype) is the centralizer of internal CUSP (self-propelled, Polish production) [1].

It contains the centering mechanism made in the form of two counter-coaxial cylinders with spacer cones on the rod and radially accommodated in the housing of the centering mechanism tappets and jimkami, four-wheeled cart, hydraulic control mechanism with hydraulic locks connected to the output of the pump. In addition, the centralizer CSP includes a transfer mechanism (self-propelled) with the transmission system, the clamping device of the rear drive wheel, a drive mounted on the trolley, and cable drum, two remote control and the electrical appliances safety control.

This addition eliminates the need for an external is oxirane heavy centralizer (m=2000 kg) and implement a self-propelled with an average speed of 0.8 m/s and passport traction force of up to 330 kN.

The disadvantage of the prototype (CWSP) is a sophisticated implementation of the self-propelled mechanism on the basis of the drive transmission system and a large reduction, powerful clamping device so that the back (top) of the drive wheel. Taking into account the maximum coefficient of friction drive wheel on the inside of the pipe To≤0,2 clamping force should be F=330:0,2=1650 kN, which is hardly feasible and appropriate. The appearance of more than one motor with a large reduction for self-propelled and powerful clamping mechanism (except for the pump to center) greatly increases the cost of the centralizer. The main load truck centralizer for the weight of the centering mechanism (m=1500 kg) to the front wheels, so the wheels of the truck, from the point of view of the coupling effort of the self-propelling mechanism, it is advisable to position as the most loaded, ahead of the centering mechanism. However, there is not electric. Due to the large reduction is complicated by the towing of the centralizer in emergency mode.

The invention is aimed at simplifying the implementation of the self-propelling mechanism of the internal hydraulic centralizer.

This technical result is achieved by the fact that the internal hydraulic centralizer (hereinafter centralizer), contains the centering mechanism made in the form of two counter-coaxial cylinders with spacer cones on the rods and radial is accommodated in the housing of the centering mechanism tappets and jimkami, four-wheeled cart, electro-hydraulic control mechanism with hydraulic locks connected to the output of the pump, put the planetary hydraulic motor, reversible electrohydrodynamical and driven axle with two universal joints, and the output of the pump through electrohydrodynamical associated with the planetary hydraulic motor, and the output of the planetary hydraulic motor through the leading axle left and right drive shafts connected to the front wheels of the truck, in addition, electrohydrodynamical made with "open" center.

The invention is illustrated by the drawing, which shows a fundamental gidroklimaticheskaya diagram of the centralizer internal hydraulic self-propelled.

The centralizer includes a centering mechanism made in the form of two counter-coaxial cylinders 1, 2 with the spacer cones 3, 4 on the rod and radially accommodated in the housing of the centering mechanism 5 pushers 6 and jimkami 7, forming concentric circles inside the pipe. Electro-hydraulic control mechanism counter-coaxial-cylinders 1, 2 centralizer contains chetyrehstrochnye stagnant reverse electrohydraulically 8, 9 with hydraulic locks 10, 11. The output of pump 12 is connected with the inputs chetyrehkratnym stagnant reverse electrohydraulically 8, 9. With the output of the pump 12 also connect the Yong reverse electrohydrodynamical 12 with open center. To the output of the reverse of electrohydraulically 13 is connected to the planetary hydraulic motor 14, through which a pivotal axis 15 and through the universal joints 16 is connected with the front wheels 17 of the truck. Channels 16 filled with slotted connections to adjust the "toe" of the front (leading) wheels 17 of the truck.

Works centralizer as follows.

After welding the next intersection from the remote control cable (not shown) the voltage of the welding unit +70 is supplied to the solenoid of the reversing electrohydraulically 13 and the pump 12. The working fluid enters the planetary hydraulic motor 14, through which a pivotal axis 15 and the drive shafts 16 rotates the front wheels 17 of the truck. Thus IMCI 7 in the initial position released inside the pipe. The centralizer on the trolley inside the tube moves forward 12-36 m to a free end with a speed of 0.6 m/s due to reverse electrohydraulically 13 at excessive run-on trolley with clamp on the free end of the pipe you can shift it back, reversive reverse electrohydrodynamical 13 so that the next junction was in the middle between the front and rear jimkami 7. To exclude helical displacement of the centralizer from joint to joint in the pipe at the front wheels 17 regulate "convergence" by phase reversal of the front forks of the truck to the side protivopul the author offset. When this propeller shafts 16 slotted connections provide connectivity planetary hydraulic motor 14 with wheels 17.

After installing the clamp on the free end of the pipeline from the remote control cable voltage welding unit +70 is supplied to the electromagnet chetyrehkolesnika stagnant reverse electrohydraulically 9 and the pump 12. The working fluid through the locking valve cut 11 enters the piston cavity counter-coaxial cylinder 2. The rear row of gemkow 7 through spacer cone 4 and the plunger 6 is dispersed, roots and fixies through pilot-operated check valve 11 in the pipeline.

To the free end of the pipeline pipelayer pristykovyvayas the next section of pipe, then the cable from the control unit, the voltage of the welding unit +70 served on chetyrehstrochnye stagnant reverse electrohydrodynamical 8 and the pump 12. The working fluid through the locking valve cut 10 enters the piston cavity counter-coaxial cylinder 1, the front row of gemkow 7 through spacer cone 3 and the pushers 6 is dispersed inside of the pipe, providing through pilot-operated check valve 10 of its concentric fixation relative to the end face on all the time of welding. After welding the next seam voltage +70 from the remote control again is supplied to the pump 12 and the reversing electromagnets chetyrehkratnym n the flow reversing electrohydraulically 8, 9, hidrotambo 10, 11 are opened, the working fluid flows into the rod end of coaxial cylinders 1, 2, the centralizer "exempt" and ready for self-propelled movement. After completion of the outer welding include a "back door" in the hydraulic self-propelled, shifting the centralizer of 1 m ago. Welders inside the pipe boil the root, then the centralizer h moves to a new interface.

The use of planetary hydraulic motor 14 in combination with a reversible electrohydrodynamical 13 and the leading axis 15, the front wheels 17 with two universal joints 16 eliminates complicated and time-consuming clamping mechanism with the actuator and gearbox inherent in the prototype (with rear driving wheel). 85-90% of the weight of the centralizer to the front wheels, therefore, the coupling force of 2000 N. if the mass of 1000 kg ensures no slippage, and Hughes overcoming lifts and inclines of up to 10° guided self-propelled from the pump 12. The low speed and large pulling force of 2000 N is achieved without reduction due to application of high torque planetary motor MGP ("Omskhydroprivod").

Performing reverse electrohydraulically 13 with "open" allow external towing for the de-energized cable clamp in emergency situations and when the slip of the front wheels when there is ice, snow nutriture in the North. The leading axle 15 and the planetary shaft of the motor 14 to rotate, and the working fluid motor circulates freely through the open center. Thus, the proposed solution simplifies emergency towing clamp, unattainable in the prototype. The use of the planetary hydraulic motor MGP with internal hydraulic reduction eliminates additional gear and get the necessary speed and force reduction 1=1:1 from motor to wheels. For convenience, layout driven axle and the shaft of the motor are connected with a chain.

The inventive clamp hydraulic self-propelled implemented in the design CVS made in OOO NPP "KAS-Automash" (gcouros), and successfully tested on the pipeline "polar - Novy Urengoy" diameter pipe 1420 mm

Sources of information

1. The centralizer internal hydraulic self-propelled CUSP. Production Of Poland. www.mtu-net.ru/gazstroy/central/samohod.htm.

2. The internal hydraulic centralizers. CJSC "Kyiv experimental mechanical plant "welding". www.kemzvatka.com.

3. Centralizers internal hydraulic JSC "Kropotkin machine-building plant". www.kremz.narod.ru.

4. The internal hydraulic centralizers. JSC "Kameshkovsky Electromechanical plant" (homeschoo, Vladimir region) Promotional materials.

5. The Ministry Stroitel the STV enterprises of the oil and gas industry of the USSR SKB "Gastroinestinal". The centralizer internal hydraulic CV. Technical description CVT. Moscow 1988

The internal hydraulic centralizer containing centering mechanism made in the form of two counter-coaxial cylinders with spacer cones on the rod and radially accommodated in the housing of the centering mechanism tappets and jimkami, four-wheeled cart, electro-hydraulic control mechanism with hydraulic locks connected to the output of the pump, characterized in that it introduced the planetary hydraulic motor, reversible electrohydrodynamical and driven axle with two universal joints, and the output of the pump through reversing electrohydrodynamical associated with the planetary hydraulic motor, and the output of the planetary hydraulic motor through the leading axle left and right drive shafts connected to the front wheels of the truck, in addition, reverse electrohydrodynamical made with “open” center.



 

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