CN111101135A

CN111101135A - Truss type double-cylinder horizontal metering separator sacrificial anode protection device

Info

Publication number: CN111101135A
Application number: CN202010113161.7A
Authority: CN
Inventors: 奚运涛; 胥珊娜; 王雷; 周好斌; 孙良; 雷书宾; 钟玉洁
Original assignee: Xian Shiyou University
Current assignee: Shaanxi Fangzhou Anti-corrosion Technology Co.,Ltd.
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-05-05
Anticipated expiration: 2040-02-24
Also published as: CN111101135B

Abstract

The invention discloses a truss type double-cylinder horizontal metering separator sacrificial anode protection device which comprises a plurality of trusses arranged in a lower tank body of a double-cylinder horizontal metering separator, wherein the top of each truss is connected with an upper rack, the bottom of each truss is connected with a lower rack, the upper part of each upper rack is uniformly provided with a plurality of elastic dynamic sealing contact systems which can be in close contact with the top of the inner wall of the lower tank body of the double-cylinder horizontal metering separator, the bottom of each lower rack is uniformly provided with a plurality of roller systems which can be in close contact with the bottom of the inner wall of the lower tank body of the double-cylinder horizontal metering separator, the middles of the trusses are connected through a lead screw capable of controlling the lifting of the trusses, a plurality of sacrificial anodes are fixed on the lead screw, the sacrificial anodes correspond to the truss. When the sacrificial anode is used, the protection current is uniformly distributed, the inner part of the tank body can be fully covered, and meanwhile, the sacrificial anode is convenient to replace.

Description

Truss type double-cylinder horizontal metering separator sacrificial anode protection device

Technical Field

The invention relates to the technical field of corrosion protection of natural gas exploitation gathering and transportation equipment, in particular to a corrosion protection device of a double-barrel horizontal metering separator with a blind-plate-type liquid collection bag end socket, and specifically relates to a sacrificial anode protection device of a truss-type double-barrel horizontal metering separator.

Background

The natural gas is buried underground to be in a condensate gas state, and after being extracted from a wellhead of a gas well, the natural gas is not dehydrated and dealkylated, contains a small amount of condensate oil, condensate water and saturated steam, has high liquid holdup and is wet natural gas. The wet gas is conveyed to each gas gathering station through a pipeline for metering and preliminary dehydration treatment, and then is conveyed to a purification plant or a treatment plant through a pipeline for deep processing, so that the natural gas becomes civil natural gas and enters thousands of households. Therefore, the metering separator is an important device for each gas gathering station in the natural gas production and gathering and transportation processes, wherein a double-barrel horizontal metering separator taking a liquid collecting bag end socket as a blind plate is mainly used, and the inner wall of a tank body is mainly subjected to corrosion prevention by adopting a sacrificial anode cathode protection method. The method is also called sacrificial anode protection method, and is a method for protecting a tank body by consuming active metal, namely, metal with stronger reducibility is used as a protective electrode and is connected with protected metal to form a primary battery, the metal with stronger reducibility is consumed as a negative electrode, and the protected metal is used as a positive electrode to avoid corrosion.

The invention discloses a sacrificial anode device which is disclosed in the patent CN 201962365U 'dual-barrel horizontal separator sacrificial anode protection device', and can provide certain corrosion inhibition protection for the inner wall of a dual-barrel horizontal separator, but the device is only arranged on one side of a cabin door of a liquid collection bag, and the other side of the cabin door is a blind plate, so that the device cannot be opened and cannot be installed; in addition, the device is designed integrally, the device and the sacrificial anode are cast into a whole, and the device needs to be replaced completely during replacement, so that the cost is high, and the problem of great resource waste exists. The invention patent CN 108893745A 'replaceable sacrificial anode device and a replacement method thereof' discloses a replaceable sacrificial anode device, but the replaceable sacrificial anode device is mainly used on a steel guide pipe tower of a ship and is not suitable for a gas field double-cylinder horizontal separator.

Disclosure of Invention

Aiming at the technical problems, the invention provides the truss type double-cylinder horizontal metering separator sacrificial anode protection device which has uniform protection current distribution, can fully cover the interior of a tank body, is convenient to replace a sacrificial anode, and solves the problems that the original device has nonuniform protection current distribution, one end of a blind plate is not protected or underprotected, a sacrificial anode support cannot be recycled and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a truss type double-cylinder horizontal metering separator sacrificial anode protection device comprises a plurality of trusses arranged in a lower tank body of a double-cylinder horizontal metering separator, the top of each truss is connected with an upper rack, the bottom of each truss is connected with a lower rack, the upper portion of each upper rack is uniformly provided with a plurality of elastic dynamic sealing contact systems capable of being in close contact with the top of the inner wall of the lower tank body of the double-cylinder horizontal metering separator, the bottom of each lower rack is uniformly provided with a plurality of roller systems capable of being in close contact with the bottom of the inner wall of the lower tank body of the double-cylinder horizontal metering separator, the middles of the trusses are connected through a lead screw capable of controlling the lifting of the trusses, a plurality of sacrificial anodes are fixed on the lead screw, the sacrificial anodes correspond to the trusses.

Further, elasticity dynamic seal contact system is including connecting the sleeve on last rack, and the sleeve is inside to be provided with the spring, and the bottom of spring is pressed on last rack, and the top of spring is connected with down spacing step, and lower spacing step passes through the cylinder connecting piece and connects supreme spacing step, and the integration of upper spacing step top is provided with the hemisphere contact, the cylinder connecting piece alternates and sets up at telescopic top.

Furthermore, the upper limiting step is in threaded connection with the cylindrical connecting piece, a threaded hole is formed in the top of the cylindrical connecting piece, and a stud matched with the threaded hole is connected to the bottom of the upper limiting step.

Further, the top of the sleeve is provided with a through hole, and the through hole is connected with the cylindrical connecting piece in a dynamic sealing mode through an O-shaped sealing ring.

Furthermore, a circular groove for placing an O-shaped sealing ring is formed in the wall thickness position of the through hole in the top of the sleeve.

Furthermore, the sacrificial anode is of a semi-cylindrical structure, a semi-cylindrical groove matched with the screw rod is formed in the middle of the sacrificial anode, and the sacrificial anode is connected with the screw rod through a clamp.

Further, the roller system comprises an inverted U-shaped roller support welded on the lower rack, and the lower portion of the roller support is connected with rollers through bolts and gaskets.

Furthermore, one end of the screw rod is connected with a claw knob.

Furthermore, the elastic dynamic seal contact system, the upper rack, the truss, the screw rod, the lower rack and the roller system are all made of steel materials.

Furthermore, the sacrificial anode is made of zinc alloy or aluminum alloy.

Compared with the prior art, the invention has the following beneficial technical effects:

the truss is connected through the screw rod, and the lifting of the truss is controlled; elastic dynamic sealing contact systems are uniformly distributed at the top of the truss to ensure that the elastic dynamic sealing contact systems are in close contact with the top of the inner wall of the tank body; the bottom of the truss is uniformly provided with a roller system, and the rollers are tightly contacted with the bottom of the inner wall of the tank body, so that the device can move freely left and right as a whole; the sacrificial anode is arranged on the lead screw to provide protective electrons, and the device has a simple structure, is convenient to assemble and disassemble, and obviously improves the overhauling efficiency; a plurality of contact points are uniformly distributed on the upper portion and the lower portion of the tank body, so that the protection current inside the liquid collecting bag tank body can be uniformly distributed and fully covered, the problem that an original protection device is not protected or is not under-protected at one end of a blind plate is solved, and the service life of the double-cylinder horizontal separator is greatly prolonged.

Furthermore, the top of the elastic dynamic seal contact system is a hemispherical contact, the surface of the contact is smooth, the contact can be ensured to be in close contact with the top of the tank, the electronic transmission is smooth, and the tank body can not be scratched; the upper limit step and the lower limit step control the travel distance of the contact, the contact is guaranteed to have certain contact strength and is guaranteed to be in tight contact, the spring can guarantee that the hemispherical contact is in tight contact with the upper wall of the tank body, and even if the contact is corroded to a certain thickness, the contact is still tight.

Furthermore, the dynamic seal design of the sleeve and the cylindrical connecting piece can prevent corrosive media from entering the sleeve while ensuring the contact to freely move up and down, and prevent parts such as a spring and the like from being corroded.

Furthermore, the sacrificial anode is fixed on the lead screw by adopting a clamp and a bolt, so that the replacement is convenient; meanwhile, the contact area with the lead screw is large, the electronic transmission is convenient, and the protection effect of the metering separator is improved.

Furthermore, one end of the screw rod is a claw knob, so that the torque is conveniently increased, the underground screw rod can rotate without a tool, the lifting of the truss is controlled, and the contact between the steel elastic dynamic sealing contact system and the top of the double-cylinder horizontal metering separator is further controlled.

Furthermore, the elastic dynamic seal contact system, the upper rack, the truss, the screw rod, the lower rack and the roller system are all made of steel materials consistent with those of the double-cylinder horizontal metering separator, so that the electric conductivity is realized, the electronic transmission is convenient, and the galvanic corrosion with the tank body can be avoided.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a schematic structural diagram of the steel elastic dynamic sealing contact system of the invention.

Fig. 4 is a schematic structural diagram of the roller system of the present invention.

FIG. 5 is a schematic diagram of a sacrificial anode structure of the present invention, wherein (a) is a side view and (b) is a front view.

Fig. 6 is a schematic view of the assembly of the through hole and the O-ring at the upper end of the sleeve in the steel elastic dynamic seal contact system of the present invention, wherein (a) is a front view and (b) is a rear view.

Fig. 7 is a schematic assembly diagram of the steel elastic dynamic sealing contact system of the present invention, wherein (a) the lower limit step is assembled with the cylindrical connecting member, and (b) the hemispherical contact is assembled with the upper limit step.

Wherein, 1-the double-cylinder horizontal metering separator is arranged on the tank body; 2-an elastic dynamic seal contact system; 3, mounting a rack; 4-a truss; 5-a sacrificial anode; 6-a lead screw; 7-a clip; 8-lower rack; 9-cavel knob; 10-opening the handle; 11-a lower tank body of the double-cylinder horizontal metering separator; 12-a roller system; 13-hemispherical contacts; 14-upper limiting step; 15-O type sealing ring; 16-a lower limit step; 17-a spring; 18-a sleeve; 19-a roller; 20-a roller bracket; 21-a gasket; 22-bolt.

Detailed Description

The invention is described in further detail below:

referring to fig. 1 to 7, the sacrificial anode protection device for the truss type double-cylinder horizontal metering separator mainly comprises a truss 4, an upper rack 3, an elastic dynamic sealing contact system 2, a sacrificial anode 5, a screw rod 6, a clamp 7, a lower rack 8, a claw knob 9, a roller system 12 and the like. The tops of the two trusses 4 are respectively connected with the two upper racks 3 and fixed by bolts; each upper rack 3 is fixedly provided with 3 elastic dynamic sealing contact systems 2 which comprise hemispherical contacts 13, upper limiting steps 14, O-shaped sealing rings 15, lower limiting steps 16, sleeves 18, springs 17 and the like; 18 lower part openings of sleeve, fix on last rack 3 through the screw thread, place spring 17 in the sleeve 18, spring 17 lower extreme and 3 surface contact of last rack, spring 17 upper end and lower spacing step 16 contact, 16 upper portions of lower spacing step are the cylinder connecting piece, spacing step 16 is down, go up spacing step 14, hemisphere contact 13 adopts the rod iron processing to form, go up spacing step 14, hemisphere contact 13 is the integrated into one piece structure, be connected with 16 parts of lower spacing step through the screw thread, 18 upper ends trompils of sleeve, move sealing connection through O

type sealing washer

15 and 16 upper portion cylinder connecting pieces of lower spacing step. The surface of the hemispherical contact 13 at the top is smooth, so that the tight contact of an elastic dynamic seal contact system can be ensured, the electronic transmission is smooth, and the inside of the tank body cannot be scratched; the sleeve sealing design can ensure that the interior of the steel elastic dynamic sealing contact system cannot be corroded by corrosive media to cause corrosion damage to components such as springs and the like; the top of the sleeve 18 is provided with a through hole, the wall thickness position of the through hole is provided with a circular groove for placing the O-shaped sealing ring 15, the wall thickness of the O-shaped sealing ring 15 is placed in the circular groove and is slightly larger than the inner diameter of the through hole, the interference fit is ensured when the cylindrical connecting piece at the upper part of the lower limiting step 16 is assembled with the O-shaped sealing ring 15, when the dynamic seal slides up and down, the circular groove can play a limiting role, the O-shaped sealing ring 15 is not separated from the through hole position, the tightness is ensured, the dynamic seal design is adopted, and the system can be ensured to move freely up and down while the; the upper limit step and the lower limit step can control the stroke distance of the system to move in a controllable range; the spring can ensure that the hemispherical contact is tightly contacted with the upper wall of the tank body, and even if the contact is corroded to a certain thickness, the contact is still tight; the middle parts of the two trusses 4 are connected through a screw rod 6, and a claw knob 9 is arranged at one end of the screw rod 6, so that the torque is conveniently increased, the trusses can be controlled to lift without the help of the rotation of a tool underground screw rod, and further the contact between the elastic dynamic sealing contact system and the top of the double-cylinder horizontal metering separator is controlled; the sacrificial anode 5 is of a semi-cylindrical structure, the middle part of the sacrificial anode is provided with a semi-cylindrical groove, the two semi-cylindrical sacrificial anodes 5 are fixed on the screw rod 6 through the clamp 7 and the bolt, the diameter of the semi-cylindrical groove is slightly larger than that of the screw rod, and the sacrificial anode is convenient and quick to replace; meanwhile, the contact area with the lead screw is large, the electronic transmission is convenient, the protection effect of the metering separator is improved, and the sacrificial anode 5 is made of zinc alloy or aluminum alloy; the bottoms of the two trusses 4 are respectively connected with the two lower racks 8 and fixed by bolts; each lower rack is distributed and fixed with 3 roller systems 12, and each system comprises a roller 19, a roller bracket 20, a bolt 22, a gasket 21 and the like; the roller support 20 is uniformly welded on the lower rack 8, the lower part of the roller support 20 is provided with through holes, a roller 19 is fixed on the roller support 20 through bolts 22 and gaskets 21, a certain gap is reserved between the roller 19 and the roller support 20, free rotation of the roller can be guaranteed, the truss 4, the upper rack 3, the elastic dynamic sealing contact system 2, the screw 6, the clamp 7, the lower rack 8, the claw knob 9, the roller system 12 and other materials are consistent with those of a double-cylinder horizontal metering separator, and the material is steel material, has conductivity, is convenient for electronic transmission, and can avoid galvanic corrosion with a tank body.

The invention is described in further detail below with reference to the following figures and specific embodiments:

and (5) assembling a steel elastic dynamic sealing contact system. Referring to fig. 1, 2, 3, 6 and 7, the O-ring 15 is first placed in the circular groove and clamped, then the cylindrical connecting piece on the upper part of the lower limiting step 16 is passed through the O-ring 15 and the circular hole on the top of the sleeve 18 and connected with the upper limiting step 14 and the hemispherical contact 13 through the self-contained screw thread, and then the spring 17 is placed in the sleeve 18 and connected with the bottom surface of the lower limiting step 16; the upper and lower limiting steps slide up and down to ensure the dynamic seal to be complete, and proper sealing lubricating grease can be coated if necessary to improve the dynamic seal and sliding performance. In the same way, the 6 elastically movable sealing contact systems 2 are assembled.

And assembling the roller system. Referring to fig. 1, 2 and 4, two lower stages 8 are respectively connected to the bottoms of two girders 4 by bolts; 3 roller wheel brackets 20 are welded and fixed on each lower rack 8 and are uniformly distributed; the roller 19 and the gasket 21 are fixed on the roller bracket 20 by bolts 22, so that the gaps between the roller 19 and the two sides of the roller bracket 20 are consistent, and the free rotation of the roller 19 is ensured. In the same way, the assembly of the 6 roller system is completed.

And integrally assembling and applying the truss. Referring to fig. 1, 2 and 5, first, 6 elastic dynamic seal contact systems and 6 roller systems are assembled and fixed on the upper and

lower stages

3 and 8. Then, the two upper platforms 3 are fixed to the tops of the two trusses 4 by bolts, and the two lower platforms 8 are fixed to the bottoms of the two trusses 4 by bolts. And then horizontally placing the two assembled trusses 4 on the ground along a straight line, and controlling the lifting of the trusses 4 by using a lead screw 6 with a cleat knob 9 to penetrate through a reserved threaded hole in the middle of the trusses 4. The height of the truss 4 is controlled by rotating the screw rod 6 to be slightly smaller than the inner diameter of the lower tank body 11 of the double-cylinder horizontal metering separator, namely the distance between the elastic dynamic sealing contact system 2 at the top and the upper wall of the tank body is 5-10 mm. And finally, 4 semi-cylindrical sacrificial anodes 5 are respectively fixed on two sides of the screw rod 6 through 4 clamps 7, the diameter of the semi-cylindrical groove is slightly larger than that of the screw rod 6, the screw rod 6 is ensured to rotate freely, and the lifting control of the truss 4 is not influenced.

After the truss 4 and the sacrificial anode 5 are installed, a tank door on one side of the separator is opened by opening a handle 10, one end of a screw rod without a claw knob 9 is slowly pushed into the tank body, after the truss 4 is completely pushed into the tank body, the claw knob 9 is rotated, the truss 4 is lifted, the elastic dynamic seal contact system 2 is in close contact with the upper wall of the tank body, the claw knob 9 is continuously rotated, and the magnitude of the contact force is controlled. And closing the tank door and putting the tank into use.

And (4) replacing the sacrificial anode. Referring to fig. 1, 2 and 5, after the device operates for one year or a period of time, the device firstly stops the operation of the double-cylinder horizontal metering separator by adopting a bypass flow dividing or transportation stopping maintenance method, and then exhausts the gas in the tank body; and opening the tank door, pulling out the truss type double-cylinder horizontal metering separator sacrificial anode protection device at a constant speed, and washing the sacrificial anode protection device with clear water. Then observing the use condition of the sacrificial anode, if the use volume is more than 1/2 or the expected volume, opening the clamp 7 through the bolt to detach the sacrificial anode 5, replacing a new sacrificial anode 5, and fixing by the clamp 7; if the volume of the used liquid is less than 1/2 or the expected volume, the liquid does not need to be replaced; detecting the wall thickness condition of the tank body, and evaluating the protection effect of the sacrificial anode; and then slowly pushing one end of the horn-free knob into the tank body, rotating the horn knob 9 after the truss 4 is completely pushed into the tank body, lifting the truss 4 to enable the elastic dynamic sealing contact system 2 to be in close contact with the upper wall of the tank body, continuously rotating the horn knob 9, controlling the magnitude of the contact force, closing the tank door, and putting the tank door into use.

Claims

1. A truss type double-cylinder horizontal metering separator sacrificial anode protection device is characterized by comprising a plurality of trusses (4) arranged in a lower tank body (11) of a double-cylinder horizontal metering separator, the top of each truss (4) is connected with an upper rack (3), the bottom of each truss (4) is connected with a lower rack (8), a plurality of elastic dynamic sealing contact systems (2) capable of being in close contact with the top of the inner wall of the lower tank body (11) of the double-cylinder horizontal metering separator are uniformly distributed at the upper part of each upper rack (3), a plurality of roller systems (12) capable of being in close contact with the bottom of the inner wall of the lower tank body (11) of the double-cylinder horizontal metering separator are uniformly distributed at the bottom of each lower rack (8), the middles of the trusses (4) are connected through lead screws (6) capable of controlling the trusses (4) to lift, a plurality of sacrificial anodes (5) are fixed on the lead screws (6), and the sacrificial anodes, and the sacrificial anode (5) is arranged at the inner side of the corresponding truss (4).

2. The sacrificial anode protection device of the truss type double-cylinder horizontal metering separator as claimed in claim 1, wherein the elastic dynamic sealing contact system (2) comprises a sleeve (18) connected to the upper rack (3), a spring (17) is arranged inside the sleeve (18), the bottom of the spring (17) presses on the upper rack (3), the top of the spring (17) is connected with a lower limiting step (16), the lower limiting step (16) is connected to an upper limiting step (14) through a cylindrical connecting piece, a hemispherical contact (13) is integrally arranged at the top of the upper limiting step (14), and the cylindrical connecting piece is arranged at the top of the sleeve (18) in a penetrating mode.

3. The sacrificial anode protection device for the truss type double-cylinder horizontal metering separator as claimed in claim 2, wherein the upper limiting step (14) is in threaded connection with the cylindrical connecting piece, a threaded hole is formed in the top of the cylindrical connecting piece, and a stud matched with the threaded hole is connected to the bottom of the upper limiting step (14).

4. The sacrificial anode protection device of the truss type double-cylinder horizontal metering separator as claimed in claim 2, wherein the top of the sleeve (18) is provided with a through hole, and the through hole is in dynamic sealing connection with the cylindrical connecting piece through an O-shaped sealing ring (15).

5. The sacrificial anode protection device for the truss type double-cylinder horizontal metering separator as claimed in claim 4, wherein a circular groove for placing the O-shaped sealing ring (15) is formed in the wall thickness position of the through hole in the top of the sleeve (18).

6. The sacrificial anode protection device of the truss type double-cylinder horizontal metering separator as claimed in claim 1, wherein the sacrificial anode (5) is of a semi-cylindrical structure, a semi-cylindrical groove matched with the screw rod (6) is formed in the middle of the sacrificial anode, and the sacrificial anode (5) is connected with the screw rod (6) through a clamp (7).

7. A trussed twin-tube horizontal metering separator sacrificial anode protection device according to claim 1, characterized in that the roller system (12) comprises an inverted U-shaped roller bracket (20) welded to the lower frame (8), the lower part of the roller bracket (20) being connected with rollers (19) by bolts (22) and gaskets (21).

8. The sacrificial anode protection device of the truss type double-cylinder horizontal metering separator as claimed in claim 1, wherein one end of the lead screw (6) is connected with a claw knob (9).

9. The sacrificial anode protection device of the truss type double-cylinder horizontal metering separator as claimed in claim 1, wherein the elastic dynamic seal contact system (2), the upper rack (3), the truss (4), the lead screw (6), the lower rack (8) and the roller system (12) are all made of steel materials.

10. The truss type double-cylinder horizontal metering separator sacrificial anode protection device as claimed in claim 1, wherein the sacrificial anode (5) is made of zinc alloy or aluminum alloy.