CN105799135A - Continuous full-wrapping equipment for pumping rod and wrapping method thereof - Google Patents

Abstract

The invention relates to continuous full coating equipment for sucker rods and a coating method thereof. The equipment includes a coating unit, a cooling device and a pushing device. The coating unit is connected with an extruder, and the extruder is equipped with a heating A heater for covering the material to a molten state, and the covering material is vacuum-adsorbed to the surface of the sucker rod at the covering unit. The method includes the following steps in sequence: (1) heating the coating material to a molten state with a heater, and extruding it into the coating unit; (2) starting the pushing device, pushing the sucker rod into the coating unit, and the pushing speed is Adjust according to its cross-sectional shape passing through the coating unit; (3) The coating material is vacuum adsorbed to the surface of the sucker rod at the coating unit. The invention realizes the continuous equal-thickness full coating of the sucker rod, simplifies the mold structure and the specific coating steps for coating irregular objects, and can directly coat the sucker rod without changing the structure of the sucker rod. The sucker rod with special-shaped cross-section realizes continuous full covering.

Description

Sucker Rod Continuous Full Covering Equipment and Covering Method

technical field

The invention relates to the field of sucker rods, in particular to continuous full-coating equipment for sucker rods and a coating method thereof.

Background technique

In the related technology, the mechanical properties of the steel sucker rod are excellent, but the wear resistance and corrosion resistance of the metal are low, which cannot cope with the harsh environment of the mine, resulting in a greatly shortened service life of the sucker rod and affecting the normal production of the oil field . In order to solve the corrosion and wear problems of the sucker rod, the surface of the sucker rod will be coated with wear-resistant and corrosion-resistant materials to increase the wear resistance and corrosion resistance of the sucker rod and prolong its service life. However, some sucker rods have special-shaped surfaces and different cross-sectional sizes, and the structure of the mold used for coating is complex, so it is impossible to fully cover the sucker rods, which affects the coating efficiency and performance of the sucker rods.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a continuous full coating equipment and method for sucker rods, which solves the problem that some sucker rods have special-shaped surfaces and have different cross-section sizes, and the mold structure used for coating is complicated, which cannot be solved. Sucker rods are fully coated with equal thickness, which affects the technical problems of the coating efficiency and performance of the sucker rods.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is a continuous full coating equipment for sucker rods, including a coating unit and a cooling device, the coating unit is connected with an extruder loaded with coating materials, and the extrusion The machine is equipped with a heater for heating the cladding material to a molten state, and the cladding material in the molten state is vacuum adsorbed to the surface of the sucker rod at the cladding unit.

Preferably, the coating unit includes a sealing ring, a pipeline, a vacuum device, a runner and a hollow coating mold; the coating mold is connected to the vacuum device through a pipeline, and is hollow in the coating mold. A vacuum cavity is formed inside of the covering mold; the sealing ring is arranged on one of the end faces of the covering mold to allow the sucker rod to pass through while maintaining the airtightness of the vacuum chamber; the flow channel is arranged in the covering mold to supply the covering material flow to the end face of the vacuum chamber.

Preferably, the pushing device includes a conveying mechanism, a front traction device, a positioning wheel, a rear traction device and a stacking frame arranged in sequence, and the coating unit and the cooling device are sequentially arranged between the positioning wheel and the rear traction device, and the The positioning wheel is located next to the cladding unit.

Preferably, the extruder and the cladding unit are perpendicular to each other.

Preferably, the diameter of the vacuum cavity of the covering mold is 0.2-1 mm larger than the maximum diameter of the sucker rod, and the gap of the flow channel is 2-5.5 mm.

Preferably, the positioning wheel is close to the cladding unit, and a travel limit switch is installed on the positioning wheel.

Preferably, the conveying mechanism is a wheeled conveying mechanism.

Preferably, the sealing ring is a rubber sealing ring.

A coating method for continuous full coating equipment for sucker rods comprises the following steps in turn: (1) adding the coating material to an extruder, starting the extruder, heating the coating material to a molten state with a heater, and Squeeze into the cladding unit; (2) start the pushing device, push the sucker rod from one end of the cladding unit, and the pushing speed of the sucker rod is adjusted according to the cross-sectional shape of the other end surface of the cladding unit; ( 3) the coating material in the molten state is vacuum adsorbed to the surface of the sucker rod at the coating unit; (4) pulling the coated part of the sucker rod so that the uncoated part of the sucker rod passes through the coating unit; ( 5) Repeat steps (1) to (4).

As a preference, a coating method for continuous full coating equipment for sucker rods comprises the following steps in turn: (1) the delivery mechanism, front traction device, positioning wheel and rear traction device are in a closed state, and the sucker rod is placed; ( 2) Put the coating material into the extruder, start the extruder, use the heater to heat the coating material to a molten state, and squeeze it into the flow channel of the coating mold; (3) Start the conveying mechanism and the positioning wheel, the The conveying mechanism clamps one end of the sucker rod, and pushes the sucker rod to move forward, and the other end of the sucker rod passes through the positioning wheel and one end surface of the vacuum chamber, enters the vacuum chamber, and closes the conveying mechanism; (4) start The front traction device pushes the sucker rod to continue to move until one end of the sucker rod is located at the other end face of the vacuum chamber, and squeezes the outflowing cladding material together at the other end face of the vacuum chamber , forming a sealed vacuum chamber with the sealing ring at one end; (5) start the vacuum device, and the coating material is adsorbed to the outer surface of the sucker rod in a vacuum state, and covers the sucker rod; (6) the coated pumping rod The oil rod is cooled and shaped by the cooling device; (7) The other end of the sucker rod passes through the rear traction device, the rear traction device is started to clamp the sucker rod and transported forward, and the front traction device is closed; (8) One end of the sucker rod enters After the vacuum chamber, close the positioning wheel; (9) move one end of the sucker rod to the rear traction device, close the rear traction device, and transport the sucker rod to the stacking rack; (10) Repeat steps (1) to (9) to Continuously coat multiple sucker rods.

Preferably, polyethylene or nylon can be used as the cladding material, and the cladding mold is kept at a temperature between 180-280°C.

Beneficial effects of the present invention:

1. According to the structural characteristics of the standard sucker rod, the present invention adopts the vacuum adsorption coating technology to realize the continuous equal-thickness full coating of the sucker rod, and simplifies the mold structure and its details for coating irregular shaped objects. The cladding step can directly realize continuous full cladding on the sucker rod with special-shaped cross-section without changing the structure of the sucker rod.

2. The present invention can conveniently and quickly adjust the coating thickness of the sucker rod in various ways. By adjusting the extrusion speed of the extruder and the gap size of the flow channel of the coating mold, the coating material can be directly controlled to flow to the end face of the vacuum chamber. The flow rate can be adjusted to adjust the coating thickness of the sucker rod, and the time for the sucker rod to pass through the end face of the vacuum chamber can also be directly controlled by changing the pulling speed of the sucker rod to adjust the coating thickness of the sucker rod.

Description of drawings

Utilize accompanying drawing to further illustrate the invention, but the embodiment in the accompanying drawing does not constitute any limitation to the present invention, for those of ordinary skill in the art, under the premise of not paying creative work, can also obtain other according to following accompanying drawing Attached picture.

Fig. 1 is a schematic structural diagram of continuous full coating equipment for sucker rods.

Fig. 2 is a structural schematic diagram of the coating unit of the continuous full coating equipment for sucker rods.

Figure 3 is a schematic diagram of the coating effect of the continuous full coating equipment for sucker rods.

Fig. 4 is a process flow chart of the method of using the continuous full coating equipment for sucker rods.

Reference signs: 1. Wheeled conveying mechanism, 2. Front traction device, 3. Positioning wheel, 4. Extruder, 5. Coating unit, 6. Air cooling device, 7. Spray cooling device, 8. Rear Traction device, 9. Stacking frame, 10. Travel limit switch, 11. Covering material, 12. Sucker rod, 5-1, Vacuum cavity, 5-2, Covering mold, 5-3, Rubber sealing ring, 5-4, pipeline, 5-5, vacuum device, 5-6, runner.

detailed description

The present invention is further described in conjunction with the following examples.

Embodiment one

The following takes a standard steel sucker rod with a cladding diameter of 19mm and a maximum diameter of 38.1mm as an example for specific description.

Sucker rod continuous full coating equipment, as shown in Figure 1, includes wheeled conveying mechanism 1, front traction device 2, positioning wheel 3, coating unit 5, cooling device, rear traction device 8 and stacking frame 9 arranged in sequence . The coating unit 5 is connected with an extruder 4 loaded with coating material. In this embodiment, the extruder 4 and the coating unit 5 are perpendicular to each other. The extruder 4 is provided with a heater to heat the coating material to a molten state, and the coating material 11 in the molten state is vacuum adsorbed to the entire surface of the sucker rod 12 at the end surface of the coating unit 5 to form The effect of uniform and equal thickness coating layer is shown in Figure 3.

In this embodiment, the wheeled conveying mechanism 1 is composed of 3 sets of wheeled conveyors side by side. In other embodiments, the wheeled conveying mechanism 1 may be composed of 4 or 5 sets of wheeled conveyors arranged side by side. The wheel conveying mechanism 1 cooperates with the front traction device 2 and the rear traction device 8 to pull the sucker rod 12 into the cladding unit 5, and the sucker rod can be adjusted by adjusting the traction speed of the front traction device 2 and the rear traction device 8 The coating thickness is 12, and the traction speed is slow when the cross-sectional area of the sucker rod 12 at the end surface of the coating unit 5 is large, and the traction speed is fast when the cross-sectional area of the sucker rod 12 at the end surface of the coating unit 5 is small , so as to ensure the uniform thickness of the sucker rod 12, and at the same time, the flexible change of the thickness of the sucker rod 12 can be realized according to the requirements of different materials and processes.

As shown in FIG. 2 , the coating unit 5 includes a rubber sealing ring 5-3, a pipeline 5-4, a vacuum device 5-5, a flow channel 5-6 and a hollow coating mold 5-2. The vacuum device 5-5 is connected to the inside of the overmold 5-2 through a pipeline 5-4, so that the inside of the overmold 5-2 forms a vacuum cavity 5-1. The rubber sealing ring 5-3 is arranged on one of the end faces of the covering mold 5-2, and the aperture of the rubber sealing ring 5-3 is equal to the small diameter of the sucker rod 12, so as to ensure that the sucker rod 12 passes through while being used for A sealed vacuum chamber 5-1 is formed. The flow channel 5-6 is provided in the covering mold 5-2 for the covering material 11 to circulate to the other end surface of the covering mold 5-2 in a ring structure. The diameter of the vacuum chamber 5-1 is 0.2-1mm larger than the maximum diameter of the sucker rod 12, so that the sucker rod 12 can pass through the vacuum chamber 5-1.

In this embodiment, as shown in Figure 1, the positioning wheel 3 is arranged next to the cladding unit 5, and a stroke limit switch 10 is installed on the positioning wheel 3, so that the positioning wheel 3 is positioned on the sucker rod. 12 During the cladding process, the sucker rod 12 is always clamped to ensure that the central axis of the sucker rod 12 coincides with the central axis of the vacuum chamber 5-1.

The following takes a standard steel sucker rod with a coating diameter of 19 mm and a maximum diameter of 38.1 mm as an example to illustrate the continuous full coating method of the sucker rod, as shown in Figure 4.

(1) Close the front traction device 2, the positioning wheel 3 and the rear traction device 8. At this time, the front traction device 2, the positioning wheel 3 and the rear traction device 8 are all in an open state, and the sucker rod 12 is placed;

(2) Add the polyethylene coating material in the hopper of the extruder 4, start the extruder 4, heat the polyethylene coating material to the molten state and squeeze the polyethylene coating material into the flow of the coating mold 5-2 In the channel, the temperature of the covering mold 5-2 is maintained between 180-220°C, the diameter of the vacuum chamber 5-1 is 38.5m, and the gap between the runners 5-6 is 2.2mm;

(3) Start the wheel conveying mechanism 1 and the positioning wheel 3, the wheel conveying mechanism 1 clamps the left big end of the sucker rod 12, pushes the sucker rod 12 forward, and waits for the right big end of the sucker rod 12 to After entering the cladding unit 5, close the wheeled conveying mechanism 1;

(4) Start the front traction device 2, block the small diameter of the sucker rod 12, push the sucker rod 12 to continue to move until the right big end of the sucker rod 12 is located at the other end surface of the vacuum chamber 5-1, After circulating the polyethylene covering material in the flow channel 5-6 to the other end face of the vacuum chamber 5-1 in a ring structure, manually squeeze the polyethylene covering material together to close the vacuum chamber 5-1 The other end surface of 1 cooperates with the rubber sealing ring 5-3 to close the vacuum chamber 5-1, so that the vacuum chamber 5-1 realizes a vacuum state. If the big end on the right side of the sucker rod 12 is not at the other end surface of the vacuum chamber 5-1, the cladding material will be squeezed. When vacuuming, the cladding material will be sucked into the vacuum chamber 5-1, Reduce or destroy the airtightness of the vacuum chamber 5-1, thereby affecting the coating effect.

(5) Start the vacuum device 5-5, the polyethylene coating material in the molten state is adsorbed on the sucker rod 12 to achieve coating, and the coating thickness is 2mm;

(6) In this embodiment, the cooling device includes an air cooling device 6 and a spray cooling device 7, and the coated sucker rod 12 is cooled and shaped through the air cooling device 6 and the spray cooling device 7 successively;

(7) After the large end on the right side of the sucker rod 12 passes through the rear traction device 8, the rear traction device 8 is started to block the small diameter of the sucker rod 12 and transported forward. The left big end of the oil rod 12 can pass through the front traction device 2;

(8) After the left big end of the sucker rod 12 enters the vacuum chamber 5-1, close the positioning wheel 3 and make it open to ensure that the sucker rod 12 passes the positioning wheel 3;

(9) After the left large end of the sucker rod 12 moves to the rear traction device 8, close the rear traction device 8, make it open, and ensure.

Claims (10)

1. Continuous full coating equipment for sucker rods, characterized in that it includes a coating unit, a cooling device and a pushing device, the coating unit is connected to an extruder loaded with coating materials, and the extruder is provided with a heating A heater for covering the material to a molten state, and the covering material in the molten state is vacuum adsorbed to the surface of the sucker rod at the covering unit. 2. The continuous full coating equipment for sucker rod according to claim 1, characterized in that, the coating unit comprises a sealing ring, a pipeline, a vacuum device, a runner and a hollow coating mold; The overmold is connected to the vacuum device through a pipeline to form a vacuum cavity inside the hollow of the overmold; the sealing ring is arranged on one end surface of the overmold to allow the sucker rod to pass through while maintaining the vacuum The airtightness of the cavity; the flow channel is set in the coating mold for the coating material to flow to the end surface of the vacuum cavity. 3. The continuous full-coating equipment for sucker rods according to claim 1, characterized in that, the pushing device comprises a conveying mechanism, a front traction device, a positioning wheel, a rear traction device and a stacking frame arranged in sequence, and the package The cladding unit and the cooling device are sequentially arranged between the positioning wheel and the rear traction device, and the positioning wheel is close to the cladding unit. 4. The continuous full coating equipment for sucker rods according to claim 3, characterized in that the extrusion machine and the coating unit are perpendicular to each other. 5. The continuous full coating equipment for sucker rods according to claim 4, characterized in that the diameter of the vacuum chamber of the coating mold is 0.2-1 mm larger than the maximum diameter of the sucker rod, and the gap between the flow channels is 2-5.5mm. 6. The continuous full coating equipment for sucker rods according to any one of claims 2-5, characterized in that the positioning wheel is close to the coating unit, and a travel limit switch is installed on the positioning wheel. 7. The continuous full coating equipment for sucker rods according to any one of claims 2-5, characterized in that, the conveying mechanism is a wheeled conveying mechanism. 8. Utilize the cladding method of a kind of sucker rod continuous full cladding equipment described in claim 1, it is characterized in that, comprise the following steps successively: (1) cladding material is added in the extruder, starts extruder, utilizes The heater heats the cladding material to a molten state, and squeezes it into the cladding unit; (2) Start the pushing device, push the sucker rod from one end of the cladding unit, and the pushing speed of the sucker rod passes through the cladding unit according to its speed. The cross-sectional shape of the other end surface of the unit is adjusted; (3) the coating material in the molten state is vacuum adsorbed to the surface of the sucker rod at the coating unit; (4) the coating part of the sucker rod is pulled to make the oil pump The uncoated part of the rod passes through the coating unit; (5) Repeat steps (1) to (4). 9. The coating method utilizing the continuous full coating equipment of the sucker rod according to claim 3 is characterized in that, comprising the following steps in sequence: (1) the conveying mechanism, the front traction device, the positioning wheel and the rear traction device are in a closed state, Place the sucker rod; (2) Add the coating material into the extruder, start the extruder, use the heater to heat the coating material to a molten state, and squeeze it into the flow channel of the coating mold; (3) Start the conveying mechanism and positioning wheel, the conveying mechanism clamps one end of the sucker rod and pushes the sucker rod to move forward, the other end of the sucker rod passes through the positioning wheel and one end surface of the vacuum chamber, enters the vacuum chamber, and closes the delivery mechanism; (4) start the front traction device, push the sucker rod to continue to move until one end of the sucker rod is located at the other end face of the vacuum chamber, put the outflowing coating material on the other end of the vacuum chamber The end faces are squeezed together to form a sealed vacuum chamber with the sealing ring at one end; (5) Start the vacuum device, and the coating material is adsorbed to the outer surface of the sucker rod in a vacuum state to cover the sucker rod; (6 ) The coated sucker rod is cooled and shaped by the cooling device; (7) the other end of the sucker rod passes through the rear traction device, the rear traction device is started to clamp the sucker rod forward, and the front traction device is closed; (8) After one end of the sucker rod enters the vacuum chamber, close the positioning wheel; (9) move one end of the sucker rod to the rear traction device, close the rear traction device, and transport the sucker rod to the stacking rack; (10) Repeat steps (1 ) to (9) can continuously coat multiple sucker rods. 10. The continuous full coating method for sucker rods according to claim 8, characterized in that polyethylene or nylon is used as the coating material, and the temperature of the coating mold is kept between 180-280°C.