Cyclic heating device for hollow sucker rod

Abstract

The invention relates to the field of oilfield development, in particular to a circulating heating device for a hollow sucker rod. Comprising a base, a heat preservation box, an electric heating tank, a circulating mechanism, a stirring mechanism, an inner wall cleaning mechanism, a filtering mechanism and a filtering plate cleaning mechanism, heat dissipated during heating of the electric heating tank and flowing of liquid can be sealed through the circulating mechanism and prevented from being dissipated into air, and heat loss is reduced; liquid can be stirred during water injection, the heating rate can be increased, the inner wall of the electric heating tank can be cleaned during water drainage, the adhesion phenomenon of incrustation and foreign matter can be prevented, automatic filtering can be achieved during water injection by arranging a filtering mechanism and a filtering plate cleaning mechanism, a filtering plate can be automatically cleaned in cooperation with the effect of a stirring mechanism during water drainage, and the water drainage efficiency is improved. And foreign matters cleaned in the electric heating tank can be discharged to the outside of the device, so that the phenomenon that the hollow sucker rod is blocked in the subsequent use process is prevented.

Description

Technical Field

[0001] The invention relates to the field of oil field development, and in particular to a hollow sucker rod circulation heating device. Background Art

[0002] In the middle and late stages of oil production in oil wells, the proportion of high-condensation and high-wax crude oil is getting higher and higher, which leads to blockage of heavy oil at the wellhead. Commonly used oil wellbore viscosity reduction processes include hot water viscosity reduction, chemical viscosity reduction and electric heating viscosity reduction. In order to effectively solve the problems existing in the heavy oil production lifting process and realize the economical and efficient production of heavy oil, the coaxial double hollow sucker rod internal circulation heating technology is adopted. It has good thermal insulation effect and small heat loss of thermal fluid, which plays a role in energy saving, viscosity reduction, and reducing well washing costs in heavy oil production.

[0003] In the prior art, when heating the inner circulation of double hollow sucker rods, a water inlet pipe and a water return pipe are connected at both ends thereof, and the water flowing through the water inlet pipe is heated by a heating burner. A coal-fired heater is usually used. When the coal-fired heater is used on site, there are problems such as high labor intensity of coal adding, high frequency of coal adding, and unstable and discontinuous combustion in the heater furnace.

[0004] Chinese utility model patent CN221609951U discloses a double hollow sucker rod heating device, which heats the water flowing through the No. 1 delivery pipe through a heating burner, and is designed with a filter to filter the circulating water to prevent clogging of the double hollow sucker rods. However, in actual use, it is difficult to remove impurities after filtering, which not only affects the flow of water, but also the impurities are easily washed into the double hollow sucker rods during the circulation of water, which not only affects the heating effect of the double hollow sucker rods, but also easily causes internal clogging of the double hollow sucker rods. After long-term use, scale will form on the inner wall of the bottom end and the inner wall of the surrounding side of the water storage tank, and the water quality will be affected when the scale falls off. It needs to be cleaned in time to prevent impurities from entering the double hollow sucker rods and causing impact. Summary of the invention

[0005] Based on this, it is necessary to provide a hollow sucker rod circulation heating device to address the existing technical problems.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: Hollow sucker rod circulation heating device, including: A base, a heat preservation box, and an electric heating pot, wherein the electric heating pot is fixedly arranged in the heat preservation box, and the heat preservation box is fixedly arranged on the top of the base; A circulation mechanism is connected to the electric heating pot, and includes a delivery pipe and a return pipe, wherein one end of the delivery pipe and the return pipe are both connected to the interior of the electric heating pot; The stirring mechanism is connected to the electric heating pot, and includes a stirring shaft and a lifting plate. A lifting cavity is provided in the electric heating pot, and the lifting plate is slidably arranged in the lifting cavity. A through hole is provided on the bottom inner wall of the lifting cavity. The top end of the stirring shaft is rotatably connected to the bottom of the lifting plate, and the bottom end of the stirring shaft passes through the through hole and extends into the electric heating pot. An inner wall cleaning mechanism is connected to the stirring shaft and comprises a bottom scraper and two side scrapers, wherein the bottom scraper is fixedly mounted on the bottom end of the stirring shaft, and the two side scrapers are slidably mounted on the top of the bottom scraper; A filtering mechanism is connected to the base and the electric heating pot, and includes a mounting platform, a filter box, an upper filter plate, a lower filter plate, and a water inlet assembly. The filter box is fixedly arranged on the top of the mounting platform, and the mounting platform is fixedly arranged on the top of the base. The filter box and the electric heating pot are connected through the water inlet assembly. A filter cavity is provided in the filter box. The upper filter plate and the lower filter plate are both vertically arranged in the filter cavity. The upper filter plate and the lower filter plate are arranged side by side in the height direction. The upper filter plate is fixedly connected to the inner wall of the filter cavity, and the upper filter plate and the lower filter plate are connected by a hinge. The filter plate cleaning mechanism is connected to the filter box and the stirring shaft, and includes a rotating rod, a brush holder, a cleaning brush, a reciprocating assembly, and a linkage assembly. The cleaning brush is fixedly mounted on the side of the brush holder and contacts the upper filter plate and the lower filter plate. A transmission cavity is opened on the upper part of the filter box. The two ends of the rotating rod are respectively rotatably mounted on the opposite inner walls of the transmission cavity. The rotating rod is connected to the stirring shaft through a linkage assembly, and the rotating rod is connected to the brush holder through a reciprocating assembly.

[0007] Furthermore, the circulation mechanism also includes a circulating water pump, which is arranged on the delivery pipe. The delivery pipe and the return pipe are respectively provided with a delivery valve and a return valve. The outside of the delivery pipe and the return pipe are both provided with an insulation cover, and the two insulation covers are both connected to the insulation box.

[0008] Furthermore, the stirring mechanism also includes a cylinder, which is fixedly installed on the top of the electric heating pot, and the movable end of the cylinder extends into the lifting chamber and is fixedly connected to the top of the lifting plate, and a driving motor is fixedly installed on the top of the lifting plate. The top inner wall of the lifting chamber is provided with an avoidance hole matched with the driving motor, and the output shaft of the driving motor is connected to the top of the stirring shaft, and a plurality of square sleeves are fixedly sleeved on the peripheral outer wall of the stirring shaft, and telescopic rods are fixedly provided on both sides of the plurality of square sleeves.

[0009] Furthermore, the inner wall cleaning mechanism also includes an extrusion shaft and two convex sliders. A trapezoidal groove is provided at the bottom of the bottom scraper, and a guide rod is fixedly installed in the trapezoidal groove. The two convex sliders are respectively slidably sleeved on the outside of the two guide rods. Two rectangular holes are provided on the top inner wall of the trapezoidal groove, and the two convex sliders are respectively slidably installed in the two rectangular holes. The bottoms of the two side scrapers are respectively fixedly connected to the tops of the two convex sliders, and the sides of the two side scrapers close to each other are provided with rectangular slide grooves, and limiting rods are commonly fixedly installed in the two rectangular slide grooves. Multiple rectangular sliders are slidably installed on the two limiting rods, and the sides of the multiple rectangular sliders are respectively fixedly connected to the ends of the multiple telescopic rods.

[0010] Furthermore, the inner wall cleaning mechanism also includes an extrusion shaft, the top of the trapezoidal groove and the bottom end of the stirring shaft are jointly provided with an avoidance groove, the top inner wall of the avoidance groove is provided with a circular groove, the top end of the extrusion shaft is slidably installed in the circular groove, the bottom end of the extrusion shaft is fixedly installed with an extrusion plate, the extrusion shaft outer sleeve is provided with a compression spring, the bottom end of the compression spring is fixedly installed on the top of the extrusion plate, and the top end of the compression spring is fixedly installed on the top inner wall of the avoidance groove, connecting rods are rotatably installed on both sides of the extrusion plate, and the two ends of the two connecting rods are respectively rotatably connected to the side portions of the two convex sliding blocks.

[0011] Furthermore, the filtering mechanism also includes a three-way pipe, one end of the three-way pipe is connected to the filter chamber, the second end of the three-way pipe is provided with a water inlet pump and a first water inlet valve, the third end of the three-way pipe is provided with a drain pump and a first drain valve, the water inlet assembly includes a water inlet pipe, one end of the water inlet pipe is connected to the filter chamber, the other end of the water inlet pipe is connected to the electric heating pot, the water inlet pipe is provided with a second water inlet valve, the bottom of the electric heating pot is connected to a drain pipe, the other end of the drain pipe is connected to the water inlet pipe, and the drain pipe is provided with a second drain valve.

[0012] Furthermore, the filter plate cleaning mechanism also includes two concave blocks, both of which are fixedly installed on the side of the brush seat, and a mounting shaft is fixedly installed between the two concave blocks. Extrusion rollers are rotatably sleeved on the two mounting shafts, and both of the extrusion rollers are in contact with the lower filter plate and the upper filter plate.

[0013] Furthermore, the linkage assembly includes a rotating shaft, and the side inner walls of the transmission chamber, the side inner walls of the lifting chamber, and the side inner walls of the insulation box are jointly provided with mounting holes, and the rotating shaft is rotatably installed in the three mounting holes, one end of the rotating shaft extends into the lifting chamber and is fixedly sleeved with a first driven bevel gear, a first driving bevel gear is fixedly sleeved outside the stirring shaft, and the first driving bevel gear is meshed with the first driven bevel gear, the other end of the rotating shaft extends into the transmission chamber and is fixedly sleeved with a worm, a worm wheel is fixedly sleeved outside the rotating rod, and the worm wheel is meshed and installed with the worm.

[0014] Furthermore, the reciprocating assembly includes two reciprocating screw rods, the relative inner walls of the filter chamber are provided with lifting grooves, and circular holes are provided between the two lifting grooves and the transmission chamber. The two reciprocating screw rods are respectively rotatably installed in the two circular holes, and the bottom ends of the two reciprocating screw rods are respectively rotatably installed on the bottom inner walls of the two lifting grooves, and the two ends of the brush seat are respectively threadedly installed on the two reciprocating screw rods, and the top ends of the two reciprocating screw rods extend into the transmission chamber and are connected to the rotating rod through the transmission unit.

[0015] Furthermore, the transmission unit includes a second active bevel gear and a second driven bevel gear, the second active bevel gear is fixedly sleeved on the outside of the rotating rod, the second driven bevel gear is fixedly sleeved on the outer wall of one of the reciprocating screw rods, the second driven bevel gear is meshed and installed with the second active bevel gear, sprockets are fixedly sleeved on the outside of the two reciprocating screw rods, and the two sprockets are connected by a chain.

[0016] Compared with the prior art, the present invention has the following beneficial effects: First, the device drives the lifting plate to move downward by starting the cylinder, thereby driving the driving motor and the stirring shaft to move downward synchronously. When the stirring shaft moves downward, the extrusion plate contacts the inner wall of the bottom end of the electric heating tank, thereby maintaining a stationary state. Under the connection of the two connecting rods and the limiting effect of the guide rod, the two convex sliders are driven to move synchronously in opposite directions. When the stirring shaft drives the bottom scraper to move to the bottom end of the electric heating tank, the two convex sliders drive the two side scrapers to move synchronously to the inner wall of the surrounding side of the electric heating tank. When the driving motor drives the stirring shaft to rotate, the inner wall of the surrounding side of the electric heating tank can be cleaned through the rotation of the bottom scraper and the two side scrapers to prevent scale and foreign matter from sticking, and to prevent interference during the heating process of the hollow sucker rod.

[0017] Secondly, the device is raised and lowered by arranging a stirring shaft, so that when it moves downward, it drives the first active bevel gear to move downward synchronously and mesh with the first driven bevel gear. When the stirring shaft rotates, it drives the rotating shaft to rotate, thereby driving the rotating rod to realize the rotation function under the meshing action of the worm wheel and the worm. When the rotating rod rotates, it can drive the two reciprocating screws to rotate synchronously through the meshing action of the second active bevel gear and the second driven bevel gear and the meshing action of the two sprockets and the chain. The brush seat is moved upward by the thread action, driving the cleaning brush to clean the lower filter plate and the upper filter plate, and allowing the cleaned foreign matter to be flushed into the drain pipe with the water flow for discharge.

[0018] Third: During the cleaning process of the device, when the brush seat drives the cleaning brush and the extrusion roller to move upward, the extrusion effect of the extrusion roller on the lower filter plate disappears. At this time, the water flow impact drives the lower filter plate to flip, thereby discharging the foreign matter cleaned in the electric heating tank to prevent the foreign matter from remaining in the electric heating tank and causing an impact. When the brush seat moves downward, it drives the extrusion roller to move downward synchronously and reset, and the lower filter plate is reset by squeezing it, thereby realizing a complete filtering function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment; Figure 2 It is a schematic diagram of the partial cross-section structure of the heat preservation box and the heat preservation cover in the embodiment; Figure 3 It is a schematic diagram of the partial cross-section structure of the heat preservation box, the electric heating tank, the bottom scraper, and the side scraper in the embodiment; Figure 4 yes Figure 3 A magnified view of the structure at center; Figure 5 yes Figure 3 A magnified view of the structure at B in the middle; Figure 6 It is a schematic diagram of the partial cross-section structure of the filter box, brush holder, concave block, and reciprocating screw rod in the embodiment; Figure 7 yes Figure 6 A magnified view of the structure at C in the middle; Figure 8 It is a schematic diagram of a partial cross-section structure of a filter box in an embodiment; Fig. 9 yes Figure 8 Enlarged view of the structure at point D in the middle.

[0020] The numbers in the figure are: 1. Base; 2. Insulation box; 3. Electric heating tank; 4. Delivery pipe; 5. Reflux pipe; 6. Circulating water pump; 7. Delivery valve; 8. Reflux valve; 9. Insulation sleeve; 10. Stirring shaft; 11. Lifting plate; 12. Cylinder; 13. Driving motor; 14. Square sleeve; 15. Telescopic rod; 16. Bottom scraper; 17. Extrusion shaft; 18. Extrusion plate; 19. Compression spring; 20. Convex slider; 21. Guide rod; 22. Connecting rod; 23. Side scraper; 24. Limit rod; 25. Rectangular slider; 26. Mounting table; 27. Filter box; 28. Upper filter plate; 29. ​​Lower filter Plate; 30, hinge; 31, shaft; 32, first active bevel gear; 33, first driven bevel gear; 34, rotating rod; 35, worm; 36, worm wheel; 37, reciprocating screw; 38, second active bevel gear; 39, second driven bevel gear; 40, sprocket; 41, chain; 42, brush holder; 43, cleaning brush; 44, concave block; 45, extrusion roller; 46, tee pipe; 47, water inlet pump; 48, first water inlet valve; 49, drain pump; 50, first drain valve; 51, water inlet pipe; 52, second water inlet valve; 53, drain pipe; 54, second drain valve. DETAILED DESCRIPTION

[0021] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] refer to Figures 1 to 9The hollow sucker rod circulation heating device comprises a base 1, an insulation box 2, an electric heating tank 3, a circulation mechanism, a stirring mechanism, an inner wall cleaning mechanism, a filtering mechanism and a filter plate cleaning mechanism. Through the circulation mechanism, the heat emitted when the electric heating tank 3 is heated and the liquid flows can be sealed to prevent it from escaping into the air, thereby reducing heat loss. By setting the stirring mechanism and the inner wall cleaning mechanism, the liquid can be stirred during water injection to increase the heating rate. The inner wall of the electric heating tank 3 can be cleaned during water drainage to prevent scale and foreign matter from sticking. By setting the filtering mechanism and the filter plate cleaning mechanism, automatic filtering can be achieved during water injection. During water drainage, the filter plate can be automatically cleaned in cooperation with the stirring mechanism, and the liquid cleaned in the electric heating tank 3 can be removed. Foreign matter is discharged to the outside of the device to prevent the hollow sucker rod from being blocked during subsequent use. The electric heating tank 3 is fixedly arranged in the heat preservation box 2. Specifically, the electric heating tank 3 is a prior art and is controlled by a PLC controller, which will not be described in detail here. The heat preservation box 2 is fixedly arranged on the top of the base 1, and the circulation mechanism is connected to the electric heating tank 3. The circulation mechanism includes a delivery pipe 4 and a return pipe 5. One end of the delivery pipe 4 and the return pipe 5 are both connected to the interior of the electric heating tank 3. The stirring mechanism is connected to the electric heating tank 3. The stirring mechanism includes a stirring shaft 10 and a lifting plate 11. A lifting chamber is provided in the electric heating tank 3. The lifting plate 11 is slidably provided in the lifting chamber. A through hole is provided at the bottom of the lifting chamber. The top of the stirring shaft 10 is rotatably connected to the bottom of the lifting plate 11. The stirring shaft The bottom end of 10 passes through the through hole and extends into the electric heating pot 3. The inner wall cleaning mechanism is connected to the stirring shaft 10. The inner wall cleaning mechanism includes a bottom scraper 16 and two side scrapers 23. The bottom scraper 16 is fixedly installed at the bottom end of the stirring shaft 10. The two side scrapers 23 are slidably installed on the top of the bottom scraper 16. The filtering mechanism is connected to the base 1 and the electric heating pot 3. The filtering mechanism includes a mounting platform 26, a filter box 27, an upper filter plate 28, a lower filter plate 29, and a water inlet assembly. The filter box 27 is fixedly arranged on the top of the mounting platform 26. The mounting platform 26 is fixedly arranged on the top of the base 1. The filter box 27 is connected to the electric heating pot 3 through the water inlet assembly. A filter cavity is opened in the filter box 27. The upper filter plate 28 and the lower filter plate 29 are both vertically arranged on the through hole. In the filter chamber, the upper filter plate 28 and the lower filter plate 29 are arranged side by side in the height direction, the upper filter plate 28 is fixedly connected to the inner wall of the filter chamber, the upper filter plate 28 and the lower filter plate 29 are connected by a hinge 30, the filter plate cleaning mechanism is connected to the filter box 27 and the stirring shaft 10, the filter plate cleaning mechanism includes a rotating rod 34, a brush holder 42, a cleaning brush 43, a reciprocating component, and a linkage component, the cleaning brush 43 is fixedly installed on the side of the brush holder 42 and contacts with the upper filter plate 28 and the lower filter plate 29, a transmission chamber is provided on the upper part of the filter box 27, the two ends of the rotating rod 34 are respectively rotatably installed on the opposite inner walls of the transmission chamber, the rotating rod 34 and the stirring shaft 10 are connected by a linkage component, and the rotating rod 34 is connected to the brush holder 42 through a reciprocating component.

[0023] The hinge 30 of the upper filter plate 28 and the lower filter plate 29 is arranged on the water inlet side, so that when draining water, the water flow can open the lower filter plate 29, and when water enters, the lower filter plate 29 can be kept stable due to the upper filter plate 28 limiting the lower filter plate 29, and the water can enter the electric heating pot 3 only after being filtered by the lower filter plate 29. The electric heating pot 3 can heat the water by the electric heating wire arranged around it.

[0024] In order to avoid a large amount of heat dissipation during transportation, the following features are also set: The circulation mechanism also includes a circulating water pump 6. Specifically, the circulating water pump 6 is controlled by a PLC controller. The circulating water pump 6 is arranged on the delivery pipe 4. The delivery pipe 4 and the return pipe 5 are respectively provided with a delivery valve 7 and a return valve 8. Specifically, the delivery valve 7 and the return valve 8 are both high-temperature resistant water valves to prevent temperature changes from reducing the sealing of the valves. The outsides of the delivery pipe 4 and the return pipe 5 are both provided with insulation sleeves 9. Specifically, the insulation box 2 and the two insulation sleeves 9 are both made of insulation materials, and the two insulation sleeves 9 are both connected to the insulation box 2. This arrangement can make the heat generated by the electric heating pot 3 during heating be sealed through the insulation box 2 and the insulation sleeve 9 to prevent it from escaping into the air. In addition, through the arrangement of the insulation sleeve 9, when the water flows through the delivery pipe 4 and the return pipe 5, heat loss can be prevented, which effectively ensures the water flow temperature during heating and improves the heating effect.

[0025] In order to uniformly heat the liquid in the electric heating tank 3, the following features are also specifically provided: The stirring mechanism also includes a cylinder 12, which is fixedly installed on the top of the electric heating pot 3. The movable end of the cylinder 12 extends into the lifting chamber and is fixedly connected to the top of the lifting plate 11. A driving motor 13 is fixedly installed on the top of the lifting plate 11. An avoidance hole compatible with the driving motor 13 is opened on the top inner wall of the lifting chamber. Specifically, the solenoid valve connected to the cylinder 12 and the driving motor 13 are controlled by a PLC controller. The output shaft of the driving motor 13 is connected to the top of the stirring shaft 10. A plurality of square sleeves 14 are fixedly sleeved on the outer wall of the peripheral side of the stirring shaft 10. Both sides of the plurality of square sleeves 14 are fixedly provided with telescopic rods 15. The stirring shaft 10 is driven to rotate by the driving motor 13, so that the plurality of telescopic rods 15 can rotate synchronously with the stirring shaft 10, thereby uniformly heating the liquid in the electric heating pot 3, preventing the phenomenon of hot bottom and cold top, and improving the heating rate.

[0026] In order to clean the inner wall of the bottom end and the inner wall of the surrounding side of the electric heating pot 3, the following features are specifically provided: The inner wall cleaning mechanism also includes an extrusion shaft 17, two convex sliders 20, a trapezoidal groove is provided at the bottom of the bottom scraper 16, a guide rod 21 is fixedly installed in the trapezoidal groove, each guide rod 21 is arranged along the radial direction of the extrusion shaft 17, the two convex sliders 20 are respectively slidably sleeved on the outside of the two guide rods 21, the top inner wall of the trapezoidal groove is provided with two rectangular holes, the two convex sliders 20 are respectively slidably installed in the two rectangular holes, the bottoms of the two side scrapers 23 are respectively fixedly connected to the tops of the two convex sliders 20, the sides of the two side scrapers 23 close to each other are provided with rectangular grooves, and the two rectangular grooves are fixedly installed There are vertical limit rods 24, and multiple rectangular sliders 25 are slidably installed on the two limit rods 24. The sides of the multiple rectangular sliders 25 are fixedly connected to the ends of the multiple telescopic rods 15 respectively. The lifting plate 11 is driven downward by the cylinder 12, thereby driving the bottom scraper 16 to contact the bottom inner wall of the electric heating pot 3. At the same time, the two side scrapers 23 are squeezed to move back and forth and fit with the surrounding inner wall of the electric heating pot 3. When the stirring shaft 10 rotates, it can drive the bottom scraper 16 and the two side scrapers 23 to rotate synchronously, clean the bottom inner wall and the surrounding inner wall of the electric heating pot 3, and prevent scale and foreign matter from sticking.

[0027] In order to make the two side scrapers 23 move synchronously and oppositely when the stirring shaft 10 moves downward, the following features are also specifically provided: The inner wall cleaning mechanism also includes an extrusion shaft 17. The top of the trapezoidal groove and the bottom end of the stirring shaft 10 are jointly provided with an avoidance groove. The top inner wall of the avoidance groove is provided with a circular groove. The top of the extrusion shaft 17 is slidably installed in the circular groove. The bottom end of the extrusion shaft 17 is fixedly installed with an extrusion plate 18. The outer sleeve of the extrusion shaft 17 is provided with a compression spring 19. Specifically, the compression spring 19 is a stainless steel spring to avoid rusting when immersed in water. The bottom end of the compression spring 19 is fixedly installed on the top of the extrusion plate 18, and the top end of the compression spring 19 is fixedly installed on the top inner wall of the avoidance groove. The two sides of the extrusion plate 18 The two ends of the two connecting rods 22 are rotatably connected to the sides of the two convex sliders 20. When the stirring shaft 10 moves downward, the extrusion plate 18 fits the inner wall of the bottom end of the electric heating pot 3, so the extrusion plate 18 and the extrusion shaft 17 remain stationary. When the stirring shaft 10 drives the bottom scraper 16 to move downward, the two convex sliders 20 and the two side scrapers 23 can be driven to move synchronously in opposite directions through the connection of the two connecting rods 22. Through the setting of multiple telescopic rods 15, the side scrapers 23 can be limited to prevent tilting during movement. In the initial state, the connecting rod 22 is in an inclined state gradually approaching the extrusion shaft 17 from top to bottom.

[0028] In order to enable the liquid to flow through the filter box 27, the following features are also specifically provided: The filtering mechanism also includes a three-way pipe 46, one end of which is connected to the filtering chamber, a water inlet pump 47 and a first water inlet valve 48 are provided at the second end of the three-way pipe 46, a drainage pump 49 and a first drainage valve 50 are provided at the third end of the three-way pipe 46, and the water inlet assembly includes a water inlet pipe 51, one end of the water inlet pipe 51 is connected to the filtering chamber, the other end of the water inlet pipe 51 is connected to the electric heating tank 3, a second water inlet valve 52 is provided on the water inlet pipe 51, and a drainage pipe 53 is connected to the bottom of the electric heating tank 3, and the other end of the drainage pipe 53 is connected to the bottom of the electric heating tank 3. The water inlet pipe 51 is connected, and the second drain valve 54 is arranged on the drain pipe 53. Specifically, the water inlet pump 47, the first water inlet valve 48, the drain pump 49, the first drain valve 50, the second water inlet valve 52 and the second drain valve 54 are all controlled by the PLC controller, and the first drain valve 50 and the second drain valve 54 are both high temperature resistant valves. Through the arrangement of the water inlet pump 47 and the drain pump 49, water injection and water pumping operations can be respectively realized in the filter box 27, so as to facilitate the water replenishment and drainage operations of the electric heating tank 3.

[0029] In order to filter water when filling the electric heating tank 3, the following features are also provided: The filter plate cleaning mechanism also includes two concave blocks 44, which are fixedly mounted on the sides of the brush holder 42. A mounting shaft is fixedly mounted between the two concave blocks 44. Extrusion rollers 45 are rotatably sleeved on the two mounting shafts. The two extrusion rollers 45 are fitted with the lower filter plate 29 and the upper filter plate 28. Through the arrangement of the upper filter plate 28 and the lower filter plate 29, a filtering function can be played when water is injected into the electric heating pot 3. Through the arrangement of the extrusion rollers 45, the lower filter plate 29 can be limited to prevent it from shaking.

[0030] In order to enable the stirring shaft 10 to drive the rotating rod 34 to realize the rotation function when rotating, the following features are also specifically provided: The linkage assembly includes a rotating shaft 31. The side inner walls of the transmission cavity, the side inner walls of the lifting cavity, and the side inner walls of the heat preservation box 2 are jointly provided with mounting holes. The rotating shaft 31 is rotatably installed in the three mounting holes. One end of the rotating shaft 31 extends into the lifting cavity and is fixedly sleeved with a first driven bevel gear 33. The stirring shaft 10 is fixedly sleeved with a first active bevel gear 32. The first active bevel gear 32 is meshed with the first driven bevel gear 33. The other end of the rotating shaft 31 extends into the transmission cavity and is fixedly sleeved with a worm 35. The rotating rod 34 is fixedly sleeved with a worm wheel 36. The worm wheel 36 is meshed and installed with the worm 35. The first active bevel gear 32 is driven downward by the stirring shaft 10 and meshed with the first driven bevel gear 33, so that when the stirring shaft 10 rotates, it can drive the rotating shaft 31 to realize the rotation function, thereby driving the rotating rod 34 to realize rotation through the meshing action of the worm 35 and the worm wheel 36.

[0031] In order to drive the brush holder 42 and the cleaning brush 43 to realize the lifting function, the following features are also specifically provided: The reciprocating assembly includes two reciprocating screw rods 37, and lifting grooves are provided on the relative inner walls of the filter chamber. Circular holes are provided between the two lifting grooves and the transmission chamber. The two reciprocating screw rods 37 are rotatably installed in the two circular holes respectively, and the bottom ends of the two reciprocating screw rods 37 are rotatably installed on the bottom inner walls of the two lifting grooves respectively. The two ends of the brush holder 42 are respectively threadedly installed on the two reciprocating screw rods 37, and the top ends of the two reciprocating screw rods 37 extend into the transmission chamber and are connected to the rotating rod 34 through the transmission unit. When the two reciprocating screw rods 37 rotate, the brush holder 42 can be driven by the threaded action to realize reciprocating lifting motion, thereby realizing the cleaning function of the upper filter plate 28 and the lower filter plate 29 through the cleaning brush 43 to prevent clogging by foreign matter and affecting the water inlet efficiency.

[0032] In order to enable the rotating rod 34 to drive the two reciprocating screw rods 37 to rotate when rotating, the following features are also specifically provided: The transmission unit includes a second active bevel gear 38 and a second driven bevel gear 39. The second active bevel gear 38 is fixedly sleeved on the outside of the rotating rod 34. The second driven bevel gear 39 is fixedly sleeved on the outer wall of the circumference of one of the reciprocating screw rods 37. The second driven bevel gear 39 is meshed and installed with the second active bevel gear 38. A sprocket 40 is fixedly sleeved on the outside of the two reciprocating screw rods 37. The two sprockets 40 are connected by a chain 41. When the rotating rod 34 rotates, the second active bevel gear 38 is driven to rotate synchronously. Through the meshing action of the second driven bevel gear 39, one of the reciprocating screw rods 37 can be driven to rotate. Through the meshing action of the two sprockets 40 and the chain 41, the other reciprocating screw rod 37 can be driven to rotate synchronously to prevent jamming during the lifting process.

[0033] The working principle of the device is that before use, the first water inlet valve 48, the second water inlet valve 52 and the water inlet pump 47 are opened, and the water is passed through the three-way pipe 46, the filter box 27 and the water inlet pipe 51 into the electric heating tank 3 by the action of the water inlet pump 47, and the water is quickly heated by the electric heating tank 3. During the heating process, the driving motor 13 is started to drive the stirring shaft 10 to rotate, thereby driving the bottom scraper 16 and multiple telescopic rods 15 to rotate synchronously through the stirring shaft 10 to stir the liquid in the electric heating tank 3, so that it is heated evenly, the heating effect is improved, and it is prevented from being difficult to reach the set temperature when heating the hollow sucker rod. During the water intake process, the impurities in the water are filtered under the action of the upper filter plate 28 and the lower filter plate 29 to prevent foreign matter from clogging the hollow sucker rod.

[0034] After the electric heating tank 3 is heated, the first water inlet valve 48 and the second water inlet valve 52 are closed, and the delivery valve 7, the reflux valve 8 and the circulating water pump 6 are opened. Water is delivered to the hollow sucker rod through the delivery pipe 4 and refluxed through the reflux pipe 5. During the flow of the liquid, the dissipated heat is collected by the insulation box 2 and the insulation sleeve 9, so that it is always in a sealed environment to prevent a large amount of heat loss.

[0035] When the use is finished, the first drain valve 50, the second drain valve 54 and the drain pump 49 are opened, and the liquid in the electric heating pot 3 is pumped out through the drain pipe 53 and the filter box 27 by the drain pump 49. During the drainage process, the cylinder 12 is started to drive the lifting plate 11 to move downward, thereby driving the drive motor 13 and the stirring shaft 10 to move downward synchronously. When the stirring shaft 10 moves downward, the squeezing plate 18 contacts the inner wall of the bottom end of the electric heating pot 3, thereby maintaining a stationary state. Under the connection of the two connecting rods 22 and the guide rod 2 1, the two convex sliders 20 are driven to move synchronously in opposite directions. When the stirring shaft 10 drives the bottom scraper 16 to move to the bottom end of the electric heating tank 3, the two convex sliders 20 drive the two side scrapers 23 to move synchronously to the inner wall of the surrounding side of the electric heating tank 3. When the driving motor 13 drives the stirring shaft 10 to rotate, the inner wall of the surrounding side of the electric heating tank 3 can be cleaned through the rotation of the bottom scraper 16 and the two side scrapers 23 to prevent scale and foreign matter from sticking, and to prevent interference in the heating process of the hollow sucker rod.

[0036] When the stirring shaft 10 moves downward, it drives the first active bevel gear 32 to move downward synchronously and mesh with the first driven bevel gear 33. When the stirring shaft 10 rotates, it drives the rotating shaft 31 to rotate, so that under the meshing action of the worm wheel 36 and the worm 35, the rotating rod 34 is driven to realize the rotation function. When the rotating rod 34 rotates, it can drive the two reciprocating screws 37 to rotate synchronously through the meshing action of the second active bevel gear 38 and the second driven bevel gear 39 and the meshing action of the two sprockets 40 and the chain 41. The brush seat 42 moves upward through the thread action, driving the cleaning brush 43 to clean the lower filter plate 29 and the upper filter plate 28, and the cleaned foreign matter is flushed into the drain pipe 53 with the water flow for discharge.

[0037] During the cleaning process, when the brush holder 42 drives the cleaning brush 43 and the squeezing roller 45 to move upward, the squeezing effect of the squeezing roller 45 on the lower filter plate 29 disappears. At this time, the lower filter plate 29 is driven to flip over through the impact of the water flow, thereby discharging the foreign matter cleaned in the electric heating pot 3 to prevent the foreign matter from remaining in the electric heating pot 3 and causing an impact. When the brush holder 42 moves downward, it drives the squeezing roller 45 to move downward synchronously and reset, and resets the lower filter plate 29 by squeezing it, thereby achieving a complete filtering function.

[0038] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. Hollow sucker rod circulation heating device, characterized in that: include: A base (1), a heat preservation box (2), and an electric heating pot (3), wherein the electric heating pot (3) is fixedly arranged in the heat preservation box (2), and the heat preservation box (2) is fixedly arranged on the top of the base (1); A circulation mechanism connected to the electric heating pot (3), comprising a delivery pipe (4) and a return pipe (5), wherein one end of the delivery pipe (4) and the return pipe (5) are both connected to the interior of the electric heating pot (3); A stirring mechanism is connected to the electric heating pot (3), comprising a stirring shaft (10) and a lifting plate (11); a lifting chamber is provided in the electric heating pot (3); the lifting plate (11) is slidably arranged in the lifting chamber; a through hole is provided on the bottom inner wall of the lifting chamber; the top end of the stirring shaft (10) is rotatably connected to the bottom of the lifting plate (11); the bottom end of the stirring shaft (10) passes through the through hole and extends into the electric heating pot (3); An inner wall cleaning mechanism connected to the stirring shaft (10), comprising a bottom scraper (16) and two side scrapers (23), wherein the bottom scraper (16) is fixedly mounted on the bottom end of the stirring shaft (10), and the two side scrapers (23) are slidably mounted on the top of the bottom scraper (16); A filtering mechanism connected to the base (1) and the electric heating pot (3), comprising a mounting platform (26), a filter box (27), an upper filter plate (28), a lower filter plate (29), and a water inlet assembly, wherein the filter box (27) is fixedly arranged on the top of the mounting platform (26), the mounting platform (26) is fixedly arranged on the top of the base (1), the filter box (27) and the electric heating pot (3) are connected via the water inlet assembly, a filter chamber is provided in the filter box (27), the upper filter plate (28) and the lower filter plate (29) are both vertically arranged in the filter chamber, the upper filter plate (28) and the lower filter plate (29) are arranged side by side in the height direction, the upper filter plate (28) is fixedly connected to the inner wall of the filter chamber, and the upper filter plate (28) and the lower filter plate (29) are connected via a hinge (30); A filter plate cleaning mechanism is connected to the filter box (27) and the stirring shaft (10), and comprises a rotating rod (34), a brush holder (42), a cleaning brush (43), a reciprocating assembly, and a linkage assembly. The cleaning brush (43) is fixedly mounted on the side of the brush holder (42) and contacts the upper filter plate (28) and the lower filter plate (29). A transmission cavity is provided at the upper portion of the filter box (27). Two ends of the rotating rod (34) are rotatably mounted on opposite inner walls of the transmission cavity. The rotating rod (34) and the stirring shaft (10) are connected via a linkage assembly. The rotating rod (34) is connected to the brush holder (42) via a reciprocating assembly.

2. The hollow sucker rod circulation heating device according to claim 1, characterized in that: The circulation mechanism further comprises a circulating water pump (6), the circulating water pump (6) being arranged on the delivery pipe (4), the delivery pipe (4) and the return pipe (5) being respectively provided with a delivery valve (7) and a return valve (8), the delivery pipe (4) and the return pipe (5) being provided with a heat-insulating sleeve (9) on the outside, and the two heat-insulating sleeves (9) being connected to the heat-insulating box (2).

3. The hollow sucker rod circulation heating device according to claim 1, characterized in that: The stirring mechanism further comprises a cylinder (12), wherein the cylinder (12) is fixedly mounted on the top of the electric heating pot (3), the movable end of the cylinder (12) extends into the lifting chamber and is fixedly connected to the top of the lifting plate (11), a driving motor (13) is fixedly mounted on the top of the lifting plate (11), a avoidance hole matching the driving motor (13) is provided on the top inner wall of the lifting chamber, an output shaft of the driving motor (13) is connected to the top of the stirring shaft (10), a plurality of square sleeves (14) are fixedly sleeved on the peripheral outer wall of the stirring shaft (10), and telescopic rods (15) are fixedly arranged on both sides of the plurality of square sleeves (14).

4. The hollow sucker rod circulation heating device according to claim 3, characterized in that: The inner wall cleaning mechanism further comprises an extrusion shaft (17) and two convex sliding blocks (20); a trapezoidal groove is provided at the bottom of the bottom scraper (16); a guide rod (21) is fixedly installed in the trapezoidal groove; the two convex sliding blocks (20) are respectively slidably sleeved on the outside of the two guide rods (21); two rectangular holes are provided on the top inner wall of the trapezoidal groove; the two convex sliding blocks (20) are respectively slidably installed in the two rectangular holes; the bottoms of the two side scrapers (23) are respectively fixedly connected to the tops of the two convex sliding blocks (20); the sides of the two side scrapers (23) close to each other are provided with rectangular sliding grooves; limiting rods (24) are fixedly installed in the two rectangular sliding grooves; a plurality of rectangular sliding blocks (25) are slidably installed on the two limiting rods (24); the sides of the plurality of rectangular sliding blocks (25) are respectively fixedly connected to the ends of the plurality of telescopic rods (15).

5. The hollow sucker rod circulation heating device according to claim 4, characterized in that: The inner wall cleaning mechanism further comprises an extrusion shaft (17), the top of the trapezoidal groove and the bottom of the stirring shaft (10) are provided with an avoidance groove, the top inner wall of the avoidance groove is provided with a circular groove, the top end of the extrusion shaft (17) is slidably mounted in the circular groove, the bottom end of the extrusion shaft (17) is fixedly mounted with an extrusion plate (18), the outer sleeve of the extrusion shaft (17) is provided with a compression spring (19), the bottom end of the compression spring (19) is fixedly mounted on the top of the extrusion plate (18), the top end of the compression spring (19) is fixedly mounted on the top inner wall of the avoidance groove, both sides of the extrusion plate (18) are rotatably mounted with connecting rods (22), and the two ends of the two connecting rods (22) are respectively rotatably connected to the side portions of the two convex sliding blocks (20).

6. The hollow sucker rod circulation heating device according to claim 1, characterized in that: The filtering mechanism further comprises a three-way pipe (46), one end of which is connected to the filtering chamber, a second end of which is provided with a water inlet pump (47) and a first water inlet valve (48), and a third end of which is provided with a water discharge pump (49) and a first water discharge valve (50). The water inlet assembly comprises a water inlet pipe (51), one end of which is connected to the filtering chamber, the other end of which is connected to the electric heating pot (3), a second water inlet valve (52) being provided on the water inlet pipe (51), and a water discharge pipe (53) being connected to the bottom of the electric heating pot (3), the other end of which is connected to the water inlet pipe (51), and a second water discharge valve (54) being provided on the water discharge pipe (53).

7. The hollow sucker rod circulation heating device according to claim 1, characterized in that: The filter plate cleaning mechanism further comprises two concave blocks (44), the two concave blocks (44) are fixedly mounted on the side of the brush seat (42), a mounting shaft is fixedly mounted between the two concave blocks (44), and squeezing rollers (45) are rotatably sleeved on the two mounting shafts, and the two squeezing rollers (45) are in contact with the lower filter plate (29) and the upper filter plate (28).

8. The hollow sucker rod circulation heating device according to claim 1, characterized in that: The linkage assembly comprises a rotating shaft (31). The side inner wall of the transmission cavity, the side inner wall of the lifting cavity, and the side inner wall of the heat preservation box (2) are all provided with mounting holes. The rotating shaft (31) is rotatably mounted in the three mounting holes. One end of the rotating shaft (31) extends into the lifting cavity and is fixedly sleeved with a first driven bevel gear (33). The stirring shaft (10) is fixedly sleeved with a first driving bevel gear (32). The first driving bevel gear (32) is meshed with the first driven bevel gear (33). The other end of the rotating shaft (31) extends into the transmission cavity and is fixedly sleeved with a worm (35). The rotating rod (34) is fixedly sleeved with a worm wheel (36). The worm wheel (36) is meshed with the worm wheel (35).

9. The hollow sucker rod circulation heating device according to claim 1, characterized in that: The reciprocating assembly comprises two reciprocating screw rods (37), the opposite inner walls of the filter chamber are provided with lifting grooves, a circular hole is provided between the two lifting grooves and the transmission chamber, the two reciprocating screw rods (37) are rotatably mounted in the two circular holes respectively, the bottom ends of the two reciprocating screw rods (37) are rotatably mounted on the bottom inner walls of the two lifting grooves respectively, the two ends of the brush holder (42) are respectively threadedly mounted on the two reciprocating screw rods (37), and the top ends of the two reciprocating screw rods (37) extend into the transmission chamber and are connected to the rotating rod (34) through a transmission unit.

10. The hollow sucker rod circulation heating device according to claim 9, characterized in that: The transmission unit comprises a second active bevel gear (38) and a second driven bevel gear (39); the second active bevel gear (38) is fixedly sleeved on the outside of the rotating rod (34); the second driven bevel gear (39) is fixedly sleeved on the outer wall of one of the reciprocating screw rods (37); the second driven bevel gear (39) is meshedly mounted with the second active bevel gear (38); sprockets (40) are fixedly sleeved on the outside of the two reciprocating screw rods (37); and the two sprockets (40) are connected via a chain (41).

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