Electromagnetic drum brake

Abstract

The invention relates to the technical field of oil development, and discloses an electromagnetic drum brake which comprises a temperature-controllable electromagnetic mechanism, and the temperature-controllable electromagnetic mechanism, an automatic impurity removal and replacement mechanism and a lubricating oil supply device input stable working current to drive a cleaning assembly to scrape and clean oil sludge on the outer surface of a movable iron core. The driving replacement assembly carries out secondary oil spraying on the outer surface of the movable iron core, so that a telescopic plate is continuously in a stretching state under the driving of compressed air, an impurity removal plate, a U-shaped scraping plate and a U-shaped rubber plate are driven to scrape the inner side face of an electromagnetic coil and the outer side face of the movable iron core, and oil sludge or impurities generated between the electromagnetic coil and the movable iron core are automatically scraped and cleaned; lubricating oil in the lubricating oil supply device can be driven to be conveyed into the lubricating cabin through the conveying branch pipe and conveyed to the surface of the movable iron core through the second countersunk groove, and the effect of automatically replacing the lubricating oil on the surface of the movable iron core is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum development, and more particularly to an electromagnetic drum brake. Background Art

[0002] In the field of oil development, the clamping brake device of the pumping rod is the core component to ensure the safe operation of the equipment. The most common clamping brake device is the electromagnetic drum brake, which is mainly composed of a brake drum, a brake shoe, an electromagnet assembly, a return spring, a support pin and an adjustment mechanism. The process of the electromagnetic drum brake for clamping the pumping rod is as follows: the control system issues a shutdown command; the electromagnet assembly is in a power-off state, the return spring returns to an uncompressed state, and the corresponding spring force is generated to drive the brake shoe to contact the brake drum, and the friction lining generates a friction torque to offset the kinetic energy or gravitational potential energy of the pumping rod, causing it to slow down to a standstill;

[0003] However, the existing electromagnetic drum brakes are prone to the following problems during daily operation: 1. Sludge accumulation problem: The lubricating oil in the gap between the moving iron core and the coil is easily mixed with sand, metal debris or high-temperature carbonization products to form sludge. Sludge will increase friction resistance, causing the moving iron core to sluggish or even stuck, resulting in brake failure. Existing technologies mostly rely on manual disassembly and cleaning on a regular basis, but the environment at the oil extraction site is harsh, the maintenance cycle is long and the downtime cost is high; 2. Temperature affects stability: The electromagnet is prone to heat up when current is passed through it for a long time, and the high temperature environment will accelerate the oxidation and deterioration of the lubricating oil, reduce the lubrication performance, and at the same time cause the electromagnet to demagnetize or the coil insulation to age, thereby reducing the overall service life of the electromagnet;

[0004] Therefore, we are in urgent need of a kind of electromagnetic drum brake now, be used to solve the technical problem proposed above. Summary of the invention

[0005] In order to overcome the above defects of the prior art, the present invention provides an electromagnetic drum brake to solve the problems existing in the above background technology.

[0006] The present invention provides the following technical solution: an electromagnetic drum brake, comprising a brake arm assembly, wherein an elastic assembly is arranged on the top of the brake arm assembly for controlling the brake arm assembly to reset, a temperature-controllable electromagnetic mechanism is installed on one side of the elastic assembly for controlling the elastic assembly to adjust its length, and a brake lining is installed on the bottom of the brake arm assembly for controlling the pumping unit rod to hold and brake;

[0007] The temperature-controllable electromagnetic mechanism comprises a protective shell, an electromagnetic coil, a moving iron core, a fixed magnetic assembly and a brake release push rod, wherein the protective shell is installed on the side of the brake arm assembly close to the elastic assembly, the inner side of the protective shell away from the elastic assembly is installed with a fixed magnetic assembly, the inner side of one end of the protective shell away from the fixed magnetic assembly is installed with an electromagnetic coil, and the moving iron core is movably sleeved on the inner side of the electromagnetic coil;

[0008] An automatic impurity removal and replacement mechanism is provided on the outer surface of one side of the protective shell near the elastic component position, and a lubricating oil supply device is installed at the bottom of the outer side of the automatic impurity removal and replacement mechanism away from the protective shell position. The automatic impurity removal and replacement mechanism includes an end cover, which is installed on the inner side of the protective shell, and the installation position of the end cover is close to the installation position of the moving iron core. The interior of the end cover near the moving iron core position is sequentially provided with a replacement component and a cleaning component;

[0009] The temperature-controllable electromagnetic mechanism, the automatic impurity removal and replacement mechanism, and the lubricating oil supply device input a stable working current, drive the cleaning component to scrape and clean the sludge on the outer surface of the moving iron core, and drive the replacement component to spray oil on the outer surface of the moving iron core for the second time.

[0010] Preferably, the automatic impurity removal and replacement mechanism includes a limit plate, which is installed on the outer side of the protective shell close to the elastic component. A wind energy providing mechanism is installed on the top of the outer side of the limit plate away from the protective shell, and a filter component and a temperature control mechanism are arranged inside the wind energy providing mechanism for filtering the compressed air generated inside the wind energy providing mechanism and adjusting the temperature of the compressed air.

[0011] Preferably, a cooling groove is provided between the inner surface and the outer surface of the protective shell, and a temperature sensing device is installed on the inner wall of the cooling groove to monitor the temperature changes inside the protective shell. The wind energy providing mechanism includes two groups of air outlet ends, and a second delivery pipe is installed on one group of air outlet ends. The end of the second delivery pipe away from the position of the wind energy providing mechanism is arranged inside the cooling groove.

[0012] Preferably, a first conveying pipe is installed through the inner wall of the protective shell, one end of the first conveying pipe extends to the interior of the cooling tank, and the other end of the cooling tank extends to the interior of the cooling tank, a first countersunk groove is opened on the inner wall of the other end of the first conveying pipe, and a first sealing cover is movably installed inside the first countersunk groove, and a first torsion spring device is provided at the connection between the first countersunk groove and the first sealing cover, a dust storage barrel is installed on the outer wall of the protective shell away from the position of the first conveying pipe, and the dust storage barrel includes an input end, on which an electrically-controlled conveying pipe is installed, and one end of the electrically-controlled conveying pipe away from the dust storage barrel is arranged inside the protective shell.

[0013] Preferably, the wind energy providing mechanism inputs a stable working current, generates compressed air of corresponding temperature, and transmits it to the inside of the cooling tank through the second delivery pipe, thereby adjusting the temperature inside the protective shell accordingly. When the compressed air inside the cooling tank reaches a certain amount, it enters the inside of the first delivery pipe, and controls the first sealing cover to rotate. The compressed air inside the cooling tank is transmitted to the inside of the protective shell through the first delivery pipe, and is discharged through the electrically controlled delivery pipe and the dust storage cylinder.

[0014] Preferably, the end cover is installed on the outer surface of the limit plate away from the position of the elastic component, and the geometric center point of the end cover is in a straight line with the geometric center point of the moving iron core, and an annular sensing groove is opened inside the end cover near the position of the moving iron core, and a sliding plate is movably sleeved on the inner wall of the sensing groove, and a plurality of groups of springs are equidistantly installed on the side of the sliding plate away from the position of the moving iron core, and one end of the plurality of groups of springs away from the sliding plate is vertically installed on the inner wall of the sensing groove, and a switch is installed on the inner wall of the sensing groove near a group of springs.

[0015] Preferably, when the current input between the electromagnetic coil and the fixed magnetic component stops, if the moving iron core can move normally on the inner side of the electromagnetic coil, one end of the moving iron core will contact the sliding plate and control the sliding plate to contact the switch.

[0016] Preferably, the end cover is provided with an annular placement cabin near the position of the induction slot provided therein, the replacement component and the cleaning component are arranged in the placement cabin, the cleaning component comprises a telescopic plate, a dust removing plate, an annular plate, a U-shaped scraper and a U-shaped rubber plate, a wind cabin is provided between the inner surface and the outer surface of the dust removing plate, the dust removing plate is movably sleeved in the replacement cabin, the telescopic plate is installed on the side of the dust removing plate away from the position of the moving iron core, a three-hole pipe is installed inside the other group of air outlet ends of the wind energy providing mechanism, and one end of the three-hole pipe away from the position of the wind energy providing mechanism is arranged inside the telescopic plate, the wind energy providing mechanism inputs a stable working current to generate compressed air and transmit it to the telescopic plate and the inside of the wind cabin, the amount of compressed air inside the telescopic plate and the wind cabin reaches a certain value, driving the telescopic plate to be in a stretched state.

[0017] Preferably, an annular plate is installed on the inner side surface of the debris removal plate away from the telescopic plate position, and multiple groups of U-shaped scrapers are equidistantly and movably sleeved on the inner side surface of the annular plate in sequence, and second torsion spring devices are provided at the connection points between the multiple groups of U-shaped scrapers and the annular plates, for driving the multiple groups of U-shaped scrapers to move toward the inner side surface position of the debris removal plate, and U-shaped rubber plates are installed on the opposite side walls of adjacent debris removal plates, and sealing columns are installed on the sides of the multiple groups of U-shaped scrapers close to the wind cabin position, and the wind cabin is sequentially provided with multiple groups of conveying holes at positions close to the multiple groups of sealing columns, and the inner side surfaces of an adjacent group of conveying holes are adaptively combined with the outer peripheral walls of the sealing columns, and the two are locatable and interlockingly connected by complementary shapes, and when each group of sealing columns is separated from the corresponding conveying hole, the U-shaped scraper and the U-shaped rubber plate contact the outer side surface of the moving iron core;

[0018] The replacement assembly includes a replacement plate, which is installed on the inner side surface of the impurity removal plate near the annular plate. A lubrication compartment is opened between the inner surface and the outer surface of the replacement plate. A plurality of groups of second countersunk grooves are equidistantly installed on the inner side surface of the replacement plate. A gas circulation device is provided between the lubrication compartment and the second countersunk grooves. Second sealing covers are installed on the inner sides of the plurality of groups of second countersunk grooves. Third torsion spring devices are provided at the connections between the plurality of groups of second sealing covers and the corresponding second countersunk grooves. The lubricating oil supply device includes an oil output port, which is provided with a delivery branch pipe, and an end of the delivery branch pipe away from the lubricating oil supply device is provided inside the lubrication compartment.

[0019] Technical effects and advantages of the present invention:

[0020] 1. When the amount of compressed air in the air cabin of the present invention rises to a rated value, part of the compressed air will enter the conveying hole, driving the sealing column to leave the conveying hole, and the moving sealing column will drive the U-shaped scraper to rotate until the U-shaped scraper and the U-shaped rubber plate contact the outer surface of the moving iron core. At the same time, the telescopic plate is continuously stretched under the drive of the compressed air, driving the impurity removal plate, the U-shaped scraper and the U-shaped rubber plate to scrape the inner side of the electromagnetic coil and the outer side of the moving iron core, and automatically scraping and cleaning the sludge or impurities generated between the two.

[0021] 2. The present invention inputs a stable working current again through the wind energy providing mechanism, drives the telescopic plate to be in the stretched state again, and drives the impurity removal plate and the replacement plate to move toward the surface of the moving iron core. At the same time, the lubricating oil providing device inputs a stable working current, drives the internal lubricating oil to be transmitted to the inside of the lubrication cabin through the delivery branch pipe, and is transmitted to the surface of the moving iron core through the second countersunk groove, so as to achieve the effect of automatically replacing the lubricating oil on the surface of the moving iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 for Figure 1 A cross-sectional view of the protective shell is shown.

[0024] Figure 3 for Figure 2 A cross-sectional view of the first delivery pipe is shown.

[0025] Figure 4 for Figure 2 A side cross-sectional view of the limit plate shown.

[0026] Figure 5 for Figure 2 A cross-sectional view of the end cover portion of the structure is shown.

[0027] Figure 6 for Figure 5 Schematic diagram of the partial structure of the sliding plate shown.

[0028] Figure 7 for Figure 5 The schematic diagram of the overall structure of the impurity removal plate is shown.

[0029] Figure 8 for Figure 7 The enlarged schematic diagram of the cross section at point A is shown.

[0030] Fig. 9 for Figure 8 A side sectional view of the replacement plate portion of the structure is shown.

[0031] The reference numerals are: 1, brake arm assembly; 2, brake lining; 3, elastic assembly; 4, temperature-controllable electromagnetic mechanism; 401, protective shell; 402, brake release push rod; 403, first conveying pipe; 4031, first countersunk groove; 4032, first sealing cover; 404, cooling groove; 405, fixed magnetic assembly; 406, dust storage cylinder; 407, electric control conveying pipe; 408, moving iron core; 409, wind energy providing mechanism; 4091, three-hole pipe; 4092, second conveying pipe; 410, electromagnetic coil; 5, Automatic debris removal and replacement mechanism; 501, limit plate; 502, end cover; 503, debris removal plate; 5031, wind cabin; 5032, delivery hole; 504, sliding plate; 505, spring; 506, switch; 507, telescopic plate; 508, sealing column; 509, U-shaped scraper; 510, U-shaped rubber plate; 511, annular plate; 512, replacement plate; 5121, second countersunk groove; 5122, lubrication cabin; 5123, second sealing cover; 6, lubricating oil supply device; 601, delivery branch pipe. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The electromagnetic drum brake involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0033] Reference Figures 1 to 6 As shown, the present invention provides an electromagnetic drum brake, comprising a brake arm assembly 1, wherein an elastic assembly 3 is arranged on the top of the brake arm assembly 1 for controlling the brake arm assembly 1 to reset, a temperature-controllable electromagnetic mechanism 4 is installed on one side of the elastic assembly 3 for controlling the elastic assembly 3 to adjust its length, and a brake lining 2 is installed on the bottom of the brake arm assembly 1 for controlling the pumping unit rod to hold and brake;

[0034] The controllable temperature electromagnetic mechanism 4 includes a protective shell 401, an electromagnetic coil 410, a moving iron core 408, a fixed magnetic component 405 and a brake release top rod 402. The protective shell 401 is installed on the side of the brake arm assembly 1 close to the elastic component 3. The fixed magnetic component 405 is installed on the inner side of the protective shell 401 away from the elastic component 3. The electromagnetic coil 410 is installed on the inner side of one end of the protective shell 401 away from the fixed magnetic component 405, and the moving iron core 408 is movably sleeved on the inner side of the electromagnetic coil 410.

[0035] An automatic impurity removal and replacement mechanism 5 is provided on the outer surface of one side of the protective shell 401 near the elastic component 3, and a lubricating oil supply device 6 is installed at the bottom of the outer side of the automatic impurity removal and replacement mechanism 5 away from the protective shell 401. The automatic impurity removal and replacement mechanism 5 includes an end cover 502, which is installed on the inner side of the protective shell 401, and the installation position of the end cover 502 is close to the installation position of the moving iron core 408. The interior of the end cover 502 near the moving iron core 408 is sequentially provided with a replacement component and a cleaning component;

[0036] The temperature-controllable electromagnetic mechanism 4, the automatic impurity removal and replacement mechanism 5 and the lubricating oil supply device 6 input a stable working current, drive the cleaning component to scrape and clean the sludge on the outer surface of the moving iron core 408, and drive the replacement component to spray oil on the outer surface of the moving iron core 408 for the second time.

[0037] In the embodiment of the present application, the specific working process of this part of the application embodiment is: the input of current between the fixed magnetic component 405 and the electromagnetic coil 410 is stopped, the magnetic attraction between the moving iron core 408 and the fixed magnetic component 405 disappears, the elastic component 3 controls the brake arm assembly 1 and the brake lining 2 to return to the original position, and the brake lining 2 contacts the pump rod to perform corresponding clamping braking operations.

[0038] Reference Figures 1 to 4 As shown, the present invention provides an electromagnetic drum brake, the automatic impurity removal and replacement mechanism 5 includes a limit plate 501, the limit plate 501 is installed on the outer side of the protective shell 401 close to the elastic component 3, the limit plate 501 is installed on the top of the outer side of the limit plate 501 away from the protective shell 401, and the wind energy providing mechanism 409 is provided with a filter component and a temperature control mechanism inside the wind energy providing mechanism 409, which is used to filter the compressed air generated inside the wind energy providing mechanism 409 and adjust the temperature of the compressed air;

[0039] A cooling groove 404 is provided between the inner surface and the outer surface of the protective shell 401, and a temperature sensing device is installed on the inner wall of the cooling groove 404 to monitor the temperature change inside the protective shell 401. The wind energy providing mechanism 409 includes two groups of air outlet ends, and a second delivery pipe 4092 is installed on one group of air outlet ends. The end of the second delivery pipe 4092 away from the position of the wind energy providing mechanism 409 is arranged inside the cooling groove 404.

[0040] A first delivery pipe 403 is installed through the inner wall of the protective shell 401, one end of the first delivery pipe 403 extends to the interior of the cooling tank 404, and the other end of the cooling tank 404 extends to the interior of the cooling tank 404. A first countersunk groove 4031 is opened on the inner wall of the other end of the first delivery pipe 403, and a first sealing cover 4032 is movably installed inside the first countersunk groove 4031, and a first torsion spring device is provided at the connection between the first countersunk groove 4031 and the first sealing cover 4032. A dust storage barrel 406 is installed on the outer wall of the protective shell 401 away from the first delivery pipe 403. The dust storage barrel 406 includes an input end, and the input end is installed with an electric control delivery pipe 407, and the end of the electric control delivery pipe 407 away from the dust storage barrel 406 is arranged inside the protective shell 401;

[0041] The wind energy providing mechanism 409 inputs a stable working current, generates compressed air of corresponding temperature, and transmits it to the interior of the cooling tank 404 through the second conveying pipe 4092, so as to adjust the temperature inside the protective shell 401 accordingly. When the compressed air inside the cooling tank 404 reaches a certain amount, it enters the interior of the first conveying pipe 403, and controls the first sealing cover 4032 to rotate. The compressed air inside the cooling tank 404 is transmitted to the interior of the protective shell 401 through the first conveying pipe 403, and is discharged through the electrically controlled conveying pipe 407 and the dust storage cylinder 406.

[0042] In the embodiment of the present application, the specific working process of this part of the application embodiment is as follows: when the temperature sensing device monitors that the temperature inside the protective shell 401 exceeds the critical value, the wind energy providing mechanism 409 inputs a stable working current to generate compressed air of corresponding temperature, which is transmitted to the inside of the cooling tank 404 through the second conveying pipe 4092, and the temperature inside the protective shell 401 is adjusted accordingly. When the compressed air inside the cooling tank 404 reaches a certain amount, it enters the inside of the first conveying pipe 403, and controls the first sealing cover 4032 to rotate. The compressed air inside the cooling tank 404 is transmitted to the inside of the protective shell 401, and the dust storage barrel 406 inputs a stable working current to generate adsorbed air, which is transmitted to the inside of the protective shell 401 through the electronically controlled conveying pipe 407. At this time, the compressed air inside the first conveying pipe 403 is driven by the dust storage barrel 406 to flow to the outside of the protective shell 401, and the flowing compressed air will drive the metal debris inside the protective shell 401 to flow to the inside of the dust storage barrel 406 for storage, thereby achieving the effect of automatically cleaning the metal debris inside the protective shell 401.

[0043] Reference Figure 2 as well as Figures 4 to 9 As shown, the present invention provides an electromagnetic drum brake, the end cover 502 is installed on the outer side of the limit plate 501 away from the elastic component 3, and the geometric center point of the end cover 502 is in a straight line with the geometric center point of the moving iron core 408, and an annular sensing groove is opened inside the end cover 502 near the moving iron core 408, and a sliding plate 504 is movably sleeved on the inner wall of the sensing groove, and a plurality of groups of springs 505 are equidistantly installed on the side of the sliding plate 504 away from the moving iron core 408, and one end of the plurality of groups of springs 505 away from the sliding plate 504 is vertically installed on the inner wall of the sensing groove, and a switch 506 is installed on the inner wall of the sensing groove near a group of springs 505;

[0044] When the current input between the electromagnetic coil 410 and the fixed magnetic assembly 405 stops, if the moving iron core 408 can move normally on the inner side of the electromagnetic coil 410, one end of the moving iron core 408 will contact the sliding plate 504 and control the sliding plate 504 to contact the switch 506;

[0045] The end cover 502 is provided with an annular storage chamber near the induction slot therein, and the replacement assembly and the cleaning assembly are arranged in the storage chamber. The cleaning assembly includes a telescopic plate 507, a dust removal plate 503, an annular plate 511, a U-shaped scraper 509 and a U-shaped rubber plate 510. A wind chamber 5031 is provided between the inner surface and the outer surface of the dust removal plate 503. The dust removal plate 503 is movably sleeved in the replacement chamber, and the telescopic plate 507 is installed on the dust removal plate 503 away from the dust removal plate 503. On the side of the moving iron core 408, a three-hole pipe 4091 is installed inside the other group of air outlet ends of the wind energy providing mechanism 409, and one end of the three-hole pipe 4091 away from the wind energy providing mechanism 409 is arranged inside the telescopic plate 507. The wind energy providing mechanism 409 inputs a stable working current to generate compressed air and transmits it to the inside of the telescopic plate 507 and the wind cabin 5031. The amount of compressed air inside the telescopic plate 507 and the wind cabin 5031 reaches a certain value, driving the telescopic plate 507 to be in a stretched state;

[0046] The inner side surface of the de-dusting plate 503 away from the telescopic plate 507 is installed with an annular plate 511, and the inner side surface of the annular plate 511 is equidistantly and movably sleeved with multiple groups of U-shaped scrapers 509, and the connection between the multiple groups of U-shaped scrapers 509 and the annular plate 511 is provided with a second torsion spring device for driving the multiple groups of U-shaped scrapers 509 to move to the inner side surface of the de-dusting plate 503, and the opposite side walls of the adjacent de-dusting plates 503 are installed with U-shaped rubber plates 510, and the multiple groups of U-shaped scrapers 509 are close to the wind. Sealing columns 508 are installed on the sides of the cabin 5031. The wind cabin 5031 is provided with multiple groups of delivery holes 5032 in sequence near the multiple groups of sealing columns 508. The inner side surface of an adjacent group of delivery holes 5032 is adaptively combined with the outer peripheral wall of the sealing column 508. The two are positioned in a chimeric connection through complementary shapes. When each group of sealing columns 508 is separated from the inside of the corresponding delivery hole 5032, the U-shaped scraper 509 and the U-shaped rubber plate 510 contact the outer side surface of the moving iron core 408.

[0047] The replacement component includes a replacement plate 512, which is installed on the inner side surface of the impurity removal plate 503 near the annular plate 511. A lubrication compartment 5122 is opened between the inner surface and the outer surface of the replacement plate 512. A plurality of groups of second countersunk grooves 5121 are installed on the inner side surface of the replacement plate 512 in sequence and equidistantly. A gas circulation device is provided between the lubrication compartment 5122 and the second countersunk grooves 5121. Second sealing covers 5123 are installed on the inner sides of the plurality of groups of second countersunk grooves 5121. Third torsion spring devices are provided at the connections between the plurality of groups of second sealing covers 5123 and the corresponding second countersunk grooves 5121. The lubricating oil supply device 6 includes an oil output port, which is equipped with a delivery branch pipe 601. The end of the delivery branch pipe 601 away from the position of the lubricating oil supply device 6 is arranged inside the lubrication compartment 5122.

[0048] In the embodiment of the present application, the telescopic plate 507 is composed of multiple groups of hollow plates connected in a socket manner, and a long spring is vertically installed on the inner wall of one end of the telescopic plate 507 close to the position of the dust removal plate 503, and the end of the long spring away from the position of the dust removal plate 503 is vertically installed on the inner side surface of the other end of the telescopic plate 507.

[0049] The specific workflow of this part of the application embodiment is as follows:

[0050] The moving iron core 408 and the fixed magnetic component 405 are in a power-off state, and the moving iron core 408 moves toward the position of the sliding plate 504 under the action of the elastic component 3. If the moving iron core 408 does not contact the sliding plate 504 and press the switch 506 within 5 seconds, the control device inside the temperature-controllable electromagnetic mechanism 4 determines that sludge or resistance-increasing impurities appear between the moving iron core 408 and the electromagnetic coil 410;

[0051] The control device controls the wind energy providing mechanism 409 to input a stable working current to generate compressed air, and transmits it to the inside of the telescopic plate 507 and the wind cabin 5031 through the three-hole pipe 4091. When the amount of compressed air inside the telescopic plate 507 and the wind cabin 5031 reaches a critical value, the telescopic plate 507 is driven to be in a stretched state. At the same time, the amount of compressed air delivered to the telescopic plate 507 and the wind cabin 5031 by the wind energy providing mechanism 409 continues to increase. When the amount of compressed air inside the wind cabin 5031 increases to a certain amount, part of the compressed air will enter the delivery hole 5032. Inside, the sealing column 508 is driven to leave the conveying hole 5032, and the sealing column 508 in the moving state drives the U-shaped scraper 509 to rotate until the U-shaped scraper 509 and the U-shaped rubber plate 510 contact the outer surface of the moving iron core 408. At the same time, the telescopic plate 507 is continuously in a stretched state driven by the compressed air, driving the impurity removal plate 503, the U-shaped scraper 509 and the U-shaped rubber plate 510 to scrape the inner side of the electromagnetic coil 410 and the outer side of the moving iron core 408, and automatically scrape and clean the sludge or impurities generated between the two;

[0052] The cleaned impurities and sludge flow into the dust storage cylinder 406 under the driving of the compressed air flowing inside the protective shell 401 for storage, thereby achieving the effect of automatically cleaning the residual impurities and sludge inside the protective shell 401;

[0053] After the surface of the moving iron core 408 is cleaned, the wind energy providing mechanism 409 inputs a stable working current again, drives the telescopic plate 507 to be stretched again, and drives the impurity removal plate 503 and the replacement plate 512 to move toward the surface of the moving iron core 408. At the same time, the lubricating oil providing device 6 inputs a stable working current, drives the internal lubricating oil to be transmitted to the inside of the lubrication compartment 5122 through the delivery branch pipe 601, and is transmitted to the surface of the moving iron core 408 through the second countersunk groove 5121, so as to achieve the effect of automatically replacing the lubricating oil on the surface of the moving iron core 408.

[0054] The specific workflow of this application is as follows:

[0055] Step 1: Stop the input of current between the fixed magnetic assembly 405 and the electromagnetic coil 410, the magnetic attraction between the moving iron core 408 and the fixed magnetic assembly 405 disappears, the elastic assembly 3 controls the brake arm assembly 1 and the brake lining 2 to return to the original position, and the brake lining 2 contacts the pumping rod to perform the corresponding clamping and braking operation;

[0056] Step 2: When the temperature sensing device detects that the temperature inside the protective shell 401 exceeds the critical value, the wind energy providing mechanism 409 inputs a stable working current to generate compressed air of corresponding temperature, which is transmitted to the cooling tank 404 through the second conveying pipe 4092, and the temperature inside the protective shell 401 is adjusted accordingly. When the compressed air inside the cooling tank 404 reaches a certain amount, it enters the first conveying pipe 403, and controls the first sealing cover 4032 to rotate. The compressed air inside the cooling tank 404 is transmitted to the inside of the protective shell 401, and the dust storage barrel 406 inputs a stable working current to generate adsorbed air, which is transmitted to the inside of the protective shell 401 through the electrically controlled conveying pipe 407. At this time, the compressed air inside the first conveying pipe 403 is driven by the dust storage barrel 406 to flow to the outside of the protective shell 401, and the flowing compressed air will drive the metal debris inside the protective shell 401 to flow to the dust storage barrel 406 for storage, thereby achieving the effect of automatically cleaning the metal debris inside the protective shell 401.

[0057] Step 3: The power is cut off between the moving iron core 408 and the fixed magnetic component 405. The moving iron core 408 moves toward the sliding plate 504 under the action of the elastic component 3. If the moving iron core 408 does not contact the sliding plate 504 and press the switch 506 within 5 seconds, the control device inside the temperature-controlled electromagnetic mechanism 4 determines that sludge or resistance-increasing impurities appear between the moving iron core 408 and the electromagnetic coil 410.

[0058] Step 4: The control device controls the wind energy providing mechanism 409 to input a stable working current to generate compressed air, and transmits it to the inside of the telescopic plate 507 and the wind cabin 5031 through the three-hole pipe 4091. When the amount of compressed air in the telescopic plate 507 and the wind cabin 5031 reaches a critical value, the telescopic plate 507 is driven to be in a stretched state. At the same time, the amount of compressed air delivered to the telescopic plate 507 and the wind cabin 5031 by the wind energy providing mechanism 409 continues to increase. When the amount of compressed air in the wind cabin 5031 increases to a certain amount, part of the compressed air will enter the delivery hole 50 32, driving the sealing column 508 to leave the conveying hole 5032, the sealing column 508 in the moving state will drive the U-shaped scraper 509 to rotate until the U-shaped scraper 509 and the U-shaped rubber plate 510 contact the outer surface of the moving iron core 408, and at the same time, the telescopic plate 507 is continuously in a stretched state driven by the compressed air, driving the impurity removal plate 503, the U-shaped scraper 509 and the U-shaped rubber plate 510 to scrape the inner side of the electromagnetic coil 410 and the outer side of the moving iron core 408, and automatically scrape and clean the sludge or impurities generated between the two;

[0059] The cleaned impurities and sludge flow into the dust storage cylinder 406 under the driving of the compressed air flowing inside the protective shell 401 for storage, thereby achieving the effect of automatically cleaning the residual impurities and sludge inside the protective shell 401;

[0060] The execution times of step 5 and step 4 are within 3-6 times, and the specific times are set manually;

[0061] Step 6: After the surface of the moving iron core 408 is cleaned, the wind energy providing mechanism 409 inputs a stable working current again, drives the telescopic plate 507 to be stretched again, and drives the impurity removal plate 503 and the replacement plate 512 to move toward the surface of the moving iron core 408. At the same time, the lubricating oil providing device 6 inputs a stable working current, drives the internal lubricating oil to be transmitted to the inside of the lubrication cabin 5122 through the delivery branch pipe 601, and is transmitted to the surface of the moving iron core 408 through the second countersunk groove 5121, so as to achieve the effect of automatically replacing the lubricating oil on the surface of the moving iron core 408;

[0062] Step 7, repeat step 3 to perform quality inspection on the cleaning effect of sludge and impurities on the surface of the moving iron core 408. After the quality inspection, the moving iron core 408 still does not contact the sliding plate 504 and press the switch 506 within 5 seconds, and the control device is manually disassembled for quality inspection.

[0063] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0064] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0065] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic drum brake, comprising a brake arm assembly (1), characterized in that: The top of the brake arm assembly (1) is provided with an elastic assembly (3) for controlling the brake arm assembly (1) to reset; one side of the elastic assembly (3) is provided with a temperature-controllable electromagnetic mechanism (4) for controlling the elastic assembly (3) to adjust its length; and the bottom of the brake arm assembly (1) is provided with a brake lining (2) for controlling the pumping unit rod to clamp and brake; The temperature-controllable electromagnetic mechanism (4) comprises a protective shell (401), an electromagnetic coil (410), a moving iron core (408), a fixed magnetic component (405) and a brake release push rod (402); the protective shell (401) is mounted on the side of the brake arm component (1) close to the elastic component (3); the fixed magnetic component (405) is mounted on the inner side of the protective shell (401) away from the elastic component (3); the electromagnetic coil (410) is mounted on the inner side of one end of the protective shell (401) away from the fixed magnetic component (405); and the moving iron core (408) is movably sleeved on the inner side of the electromagnetic coil (410); An automatic impurity removal and replacement mechanism (5) is provided on the outer surface of one side of the protective shell (401) close to the elastic component (3); a lubricating oil supply device (6) is installed at the bottom of the outer side surface of the automatic impurity removal and replacement mechanism (5) away from the protective shell (401); the automatic impurity removal and replacement mechanism (5) comprises an end cover (502); the end cover (502) is installed on the inner side surface of the protective shell (401); the installation position of the end cover (502) is close to the installation position of the moving iron core (408); and a replacement component and a cleaning component are sequentially arranged inside the end cover (502) close to the moving iron core (408); The temperature-controllable electromagnetic mechanism (4), the automatic impurity removal and replacement mechanism (5), and the lubricating oil supply device (6) input a stable working current, drive the cleaning component to scrape and clean the sludge on the outer surface of the moving iron core (408), and drive the replacement component to spray oil on the outer surface of the moving iron core (408) for a second time.

2. The electromagnetic drum brake according to claim 1, characterized in that: The automatic impurity removal and replacement mechanism (5) comprises a limit plate (501), the limit plate (501) being mounted on the outer side surface of the protective shell (401) close to the elastic component (3), a wind energy providing mechanism (409) being mounted on the top of the outer side surface of the limit plate (501) away from the protective shell (401), and a filter component and a temperature control mechanism being arranged inside the wind energy providing mechanism (409) for filtering compressed air generated inside the wind energy providing mechanism (409) and regulating the temperature of the compressed air.

3. An electromagnetic drum brake according to claim 2, characterized in that: A cooling groove (404) is provided between the inner surface and the outer surface of the protective shell (401), and a temperature sensing device is installed on the inner wall of the cooling groove (404) for monitoring the temperature change inside the protective shell (401). The wind energy providing mechanism (409) comprises two groups of air outlet ends, a second delivery pipe (4092) is installed on one group of air outlet ends, and an end of the second delivery pipe (4092) away from the position of the wind energy providing mechanism (409) is arranged inside the cooling groove (404).

4. The electromagnetic drum brake according to claim 3, characterized in that: A first conveying pipe (403) is installed through the inner wall of the protective shell (401), one end of the first conveying pipe (403) extends to the interior of the cooling tank (404), and the other end of the cooling tank (404) extends to the interior of the cooling tank (404). A first countersunk groove (4031) is provided on the inner wall of the other end of the first conveying pipe (403), and a first sealing cover (4032) is movably installed inside the first countersunk groove (4031), and a first torsion spring device is provided at the connection between the first countersunk groove (4031) and the first sealing cover (4032). A dust storage barrel (406) is installed on the outer wall of the protective shell (401) away from the first conveying pipe (403), and the dust storage barrel (406) comprises an input end, and an electric control conveying pipe (407) is installed on the input end, and one end of the electric control conveying pipe (407) away from the dust storage barrel (406) is arranged inside the protective shell (401).

5. The electromagnetic drum brake according to claim 4, characterized in that: The wind energy providing mechanism (409) inputs a stable working current to generate compressed air of a corresponding temperature, which is transmitted to the interior of the cooling tank (404) through the second delivery pipe (4092), and the temperature inside the protective shell (401) is adjusted accordingly. When the compressed air inside the cooling tank (404) reaches a certain amount, it enters the interior of the first delivery pipe (403), and controls the first sealing cover (4032) to rotate. The compressed air inside the cooling tank (404) is transmitted to the interior of the protective shell (401) through the first delivery pipe (403), and is discharged through the electrically controlled delivery pipe (407) and the dust storage cylinder (406).

6. The electromagnetic drum brake according to claim 2, characterized in that: The end cover (502) is mounted on the outer surface of the position of the limit plate (501) away from the elastic component (3), and the geometric center point of the end cover (502) is on a straight line with the geometric center point of the moving iron core (408). An annular sensing groove is provided inside the end cover (502) near the moving iron core (408), and a sliding plate (504) is movably sleeved on the inner wall of the sensing groove. A plurality of groups of springs (505) are equidistantly mounted on the side of the sliding plate (504) away from the moving iron core (408), and one end of the plurality of groups of springs (505) away from the sliding plate (504) is vertically mounted on the inner wall of the sensing groove, and a switch (506) is mounted on the inner wall of the sensing groove near a group of springs (505).

7. The electromagnetic drum brake according to claim 6, characterized in that: When the current input between the electromagnetic coil (410) and the fixed magnetic component (405) stops, if the moving iron core (408) can move normally on the inner side of the electromagnetic coil (410), one end of the moving iron core (408) will contact the sliding plate (504) and control the sliding plate (504) to contact the switch (506).

8. The electromagnetic drum brake according to claim 6, characterized in that: The end cover (502) is provided with an annular storage chamber near the position where the sensing slot is provided therein, and the replacement component and the cleaning component are arranged in the storage chamber. The cleaning component comprises a telescopic plate (507), a debris removal plate (503), an annular plate (511), a U-shaped scraper (509) and a U-shaped rubber plate (510). An air chamber (5031) is provided between the inner surface and the outer surface of the debris removal plate (503). The debris removal plate (503) is movably sleeved in the replacement chamber. The telescopic plate (507) is installed at a position away from the moving part of the debris removal plate (503). On the side of the iron core (408), another set of air outlet ends of the wind energy providing mechanism (409) is internally installed with a three-hole tube (4091), and one end of the three-hole tube (4091) away from the wind energy providing mechanism (409) is arranged inside the telescopic plate (507). The wind energy providing mechanism (409) inputs a stable working current to generate compressed air which is transmitted to the inside of the telescopic plate (507) and the wind cabin (5031). When the amount of compressed air inside the telescopic plate (507) and the wind cabin (5031) reaches a certain value, the telescopic plate (507) is driven to be in a stretched state.

9. The electromagnetic drum brake according to claim 8, characterized in that: An annular plate (511) is installed on the inner side surface of the debris removal plate (503) away from the telescopic plate (507), and multiple groups of U-shaped scrapers (509) are movably sleeved on the inner side surface of the annular plate (511) at equal intervals. A second torsion spring device is provided at the connection between the multiple groups of U-shaped scrapers (509) and the annular plate (511), which is used to drive the multiple groups of U-shaped scrapers (509) to move toward the inner side surface of the debris removal plate (503). U-shaped rubber plates (510) are installed on the opposite side walls of adjacent debris removal plates (503). The multiple groups of U-shaped scrapers (509) are close to the windshield. Sealing columns (508) are installed on the sides of the cabin (5031), and the wind cabin (5031) is provided with multiple groups of delivery holes (5032) in sequence at positions close to the multiple groups of sealing columns (508). The inner side surfaces of an adjacent group of delivery holes (5032) are adaptively combined with the outer peripheral wall of the sealing columns (508), and the two are positionably engaged through complementary shapes. When each group of sealing columns (508) is separated from the inside of the corresponding delivery hole (5032), the U-shaped scraper (509) and the U-shaped rubber plate (510) contact the outer side surface of the moving iron core (408); The replacement assembly comprises a replacement plate (512), the replacement plate (512) being mounted on the inner side surface of the impurity removing plate (503) at a position close to the annular plate (511); a lubrication chamber (5122) is provided between the inner surface and the outer surface of the replacement plate (512); a plurality of groups of second countersunk grooves (5121) are equidistantly mounted on the inner side surface of the replacement plate (512); a gas mutual circulation device is provided between the lubrication chamber (5122) and the second countersunk grooves (5121); a second sealing cover (5123) is mounted on the inner side surfaces of the plurality of groups of the second countersunk grooves (5121); a third torsion spring device is mounted at the connection between the plurality of groups of the second sealing covers (5123) and the corresponding second countersunk grooves (5121); and the lubricating oil supply device (6) comprises an oil output port, the oil output port being mounted with a delivery branch pipe (601); an end of the delivery branch pipe (601) away from the position of the lubricating oil supply device (6) being arranged inside the lubrication chamber (5122).

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