Protection mechanism and protection method for the electric control box of a crane

Abstract

The present invention belongs to the field of electric control boxes, and specifically relates to a protection mechanism and a protection method for an electric control box of a crane. It includes a box body assembly, a damping assembly is sleeved on the box body assembly, and a dust removal assembly is communicated with one side of the box body assembly; the box body assembly includes a box shell, and the box shell is a rectangular column cavity structure with one end open; the damping assembly includes a bottom plate, a vertical plate is fixedly arranged on the bottom plate, the cross section of the vertical plate is set as a "┐" shaped structure, and the space enclosed between the bottom plate and the vertical plate forms a damping cavity; the dust removal assembly includes a dust suction cavity, a dust suction pipe is communicated with one side of the dust suction cavity, the dust suction pipe penetrates and extends to the inside of the dust suction cavity, one end of the dust suction pipe inside the dust suction cavity is connected with a flared opening, and the end of the dust suction pipe far away from the dust suction cavity is communicated with a cylindrical part; the protection mechanism of this electric control box has good damping effect, strong heat dissipation ability, and can quickly clean the dust inside the electric control box.

Description

Technical Field

[0001] The present invention belongs to the field of electric control boxes, and specifically relates to a protection mechanism and a protection method for the electric control box of a crane. Background Art

[0002] A crane is a mechanical device used for hoisting and aerial work, and is widely used in many fields such as construction, ports, logistics, mines, etc. A crane mainly includes a load-bearing structure, a running mechanism, a hoisting mechanism, an electrical control system, etc. The electric control box is the core component of the crane's electrical control system. By controlling operations such as starting, stopping, and speed regulation of the motor, various actions of the crane are realized, such as hoisting, lowering, traveling, slewing, etc. As an indispensable and important device of the crane, the electric control box is a key component to ensure the safe and reliable operation of the crane.

[0003] Chinese Patent with application number CN202110021779.5 discloses a wall-mounted electric control box with a shock-absorbing structure, including an electric control box body and a mounting frame. A pair of clamping blocks are symmetrically and fixedly connected to the upper end of the mounting frame. A pair of clamping seats that are cooperatively connected with the clamping blocks are fixedly connected to the back of the electric control box body. A vertically arranged clamping groove for clamping the clamping blocks is formed on the lower end surface of the clamping seat; horizontal grooves are provided on a pair of opposite inner walls of the clamping groove, and a movable block is slidably connected in each of the grooves. The two movable blocks are respectively arranged on both sides of the clamping block, and an elastic structure is connected between one end of the movable block and the inner wall of the groove; the shock absorption effect of this electric control box is poor. Especially in an operating environment with frequent vibrations, the wiring terminals in the electric control box may become loose, which may lead to poor signal contact and affect normal use.

[0004] The operating characteristics of a crane are characterized by having an obvious working cycle. Each cycle usually includes different working stages such as hoisting, translation, lowering, etc. During the entire operation process, vibrations will be continuously generated. The stress and fatigue effects generated by long-term vibrations will accelerate the aging process of electrical components, cause fatigue cracks and deformation in the box structure of the electric control box, reduce the service life and reliability of the electric control box; in addition, the working environment of the crane has more dust, and the dust is easily accumulated on the electrical components, resulting in problems such as poor heat dissipation, decreased insulation performance, and poor contact, accelerating the damage process of the electric control box and increasing the maintenance and replacement costs of the electric control box. Summary of the Invention

[0005] In view of the above problems, the present invention provides a protection mechanism and a protection method for the electric control box of a crane to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A protection mechanism for the electric control box of a crane, including a box body assembly, a shock-absorbing assembly is sleeved on the box body assembly, and a dust-removing assembly is communicated with one side of the box body assembly;

[0007] The box assembly includes a box shell, which is a rectangular column cavity structure with one end open;

[0008] The vibration damping assembly includes a bottom plate, on which a vertical plate is fixedly arranged. The cross-section of the vertical plate is set as a "┐" shaped structure, and the space enclosed between the bottom plate and the vertical plate forms a vibration damping cavity;

[0009] The dust removal assembly includes a dust suction cavity. One side of the dust suction cavity is communicated with a dust suction pipe, which penetrates and extends into the interior of the dust suction cavity. One end of the dust suction pipe inside the dust suction cavity is connected with a bell mouth. One end of the dust suction pipe far from the dust suction cavity is communicated with a cylindrical part. A second solenoid valve is arranged on the side of the dust suction pipe close to the dust suction cavity inside the dust suction pipe, and a suction fan is arranged on the side of the dust suction pipe close to the cylindrical part inside the dust suction pipe.

[0010] Preferably, a working cavity and a gas storage cavity are arranged inside the box shell. A microporous plate is connected between the working cavity and the gas storage cavity, and the microporous plate is fixedly connected with the inner side wall of the box shell. A temperature sensor is arranged inside the working cavity.

[0011] Preferably, a partition plate is arranged on the side of the box shell far from the microporous plate, and the partition plate is fixedly connected with the inner side wall of the box shell. A first solenoid valve is installed at the bottom of the partition plate in a rectangular array. A permanent magnet plate is arranged on the side of the partition plate far from the working cavity. An activity groove is opened on the side wall of the box shell far from the partition plate, and the permanent magnet plate is hermetically and slidably connected with the inner side wall of the activity groove. A weighing sensor is arranged on the permanent magnet plate.

[0012] Preferably, a movable door is installed on one side of the box shell. The movable door is hinged with the box shell. Heat dissipation holes are opened on the movable door, and a plurality of heat dissipation fins are uniformly arranged inside the heat dissipation holes. A glass window is opened on the side of the movable door close to the heat dissipation holes.

[0013] Preferably, a plurality of electromagnetic plates are arranged on the bottom plate. The opposite end faces of the electromagnetic plates and the permanent magnet plate are magnetically different. One end of the first damping spring is fixedly arranged at the end of the electromagnetic plate far from the bottom plate, and the other end of the first damping spring is fixedly arranged at a support plate. The upper surface of the support plate abuts against the bottom of the box shell. A second damping spring is fixedly arranged on the upper surface of the support plate, and the other end of the second damping spring is fixedly connected with the bottom of the permanent magnet plate.

[0014] Preferably, two ventilation holes are opened on the vertical plate. One end of the two ventilation holes is communicated with the vibration damping cavity, and the other end is communicated with the inside of the connecting pipe. The end of the connecting pipe far from the ventilation hole is communicated with the gas storage cavity.

[0015] Preferably, a conical part is connected below the cylindrical part, the other end of the conical part is connected with a dust storage chamber, one end of the cylindrical part far from the conical part is connected with an air outlet pipe, the extending end of the air outlet pipe is located inside the cylindrical part and close to the conical part, and the other end of the air outlet pipe is communicated with an air storage cavity.

[0016] The present invention also discloses a protection method for a protection mechanism of an electric control box of a crane, comprising the following steps:

[0017] Step 1: The housing of the electric control box vibrates synchronously to generate a downward force. The bottom of the housing compresses the support plate and the first damping spring. At the same time, the housing drives the permanent magnet plate to compress the second damping spring. The gas inside the damping cavity is compressed and then enters the air storage cavity. The gas continuously discharges along the micropores inside the microporous plate and enters the working cavity.

[0018] Step 2: When the first damping spring and the second damping spring rebound, the gas inside the working cavity sequentially enters the damping cavity through the microporous plate, the connecting pipe and the ventilation hole. A filter screen is arranged below the microporous plate to block dust and prevent dust from entering the air storage cavity.

[0019] Step 3: Control the reciprocating movement of the permanent magnet plate to strike the top and bottom of the movable groove, so that the dust between the electrical components in the working cavity quickly falls and lands in the dust suction cavity. Close the first solenoid valve, open the second solenoid valve, and start the exhaust fan. The exhaust fan generates suction force, and sucks the dust-containing gas inside the dust suction cavity to the cylindrical part through the bell mouth and the dust suction pipe. The dust-containing gas rotates between the cylindrical part and the air outlet pipe to form a downward outer swirl, and the dust falls into the dust storage chamber, and the clean gas flows into the air storage cavity.

[0020] Step 4: Use a temperature sensor to monitor the working temperature inside the electric control box. When the temperature reaches the preset value, control the opening angle of the heat dissipation fins to be the largest. The first solenoid valve and the second solenoid valve remain in the open state, and start the exhaust fan to promote the rapid flow of external air along the path of the working cavity, the dust suction cavity, the cylindrical part, the air outlet pipe and the air storage cavity.

[0021] Compared with the prior art, the beneficial effects of the present application are as follows:

[0022] 1. By setting the first damping spring, the second damping spring, the microporous plate, the damping cavity, the air storage cavity and the working cavity and other components to cooperate with each other, the micropores inside the microporous plate can make the gas in the working cavity and the air storage cavity form a damping force during the exchange process. This damping force plays a role in vibration damping, buffering and preventing rebound, thereby effectively reducing the vibration amplitude of the electric control box and protecting the service life and reliability of the electric control box. At the same time, during the continuous exchange process of the gas in the working cavity and the air storage cavity, a continuous air flow will be generated to promote the rapid circulation of the hot air between the electrical components inside the working cavity, playing the role of heat dissipation and dust removal.

[0023] 2. By setting up the electromagnetic plate, permanent magnet plate, isolation plate, first solenoid valve, dust suction cavity and other components to cooperate with each other, the present application controls the intermittent current input to the electromagnetic plate, causing the permanent magnet plate to strike the top and bottom of the movable groove, so that the dust between the electrical components in the working cavity quickly falls to the upper surface of the isolation plate. Then, the first solenoid valve is opened, and the dust suction cavity in the negative pressure environment quickly cleans the dust inside the electric control box, avoiding the problem of excessive dust accumulation inside the electric control box. At the same time, the reciprocating movement of the permanent magnet plate compresses the air in the cavities on both sides of the permanent magnet plate, promoting the change of air pressure inside the damping cavity and driving the gas exchange between the working cavity and the air storage cavity, further strengthening the functions of heat dissipation and dust removal.

[0024] 3. By setting up the dust suction cavity, heat dissipation fins, exhaust fan, temperature sensor and other components to cooperate with each other, the exhaust fan generates suction to blow the dust-containing gas inside the dust suction cavity to the cylindrical part. Under the action of centrifugal force, the dust falls into the dust storage cavity, and the purified gas flows into the air storage cavity through the air outlet pipe, realizing the rapid cleaning of the dust inside the dust suction cavity. At the same time, after the temperature sensor monitors that the temperature reaches the preset value, it controls the heat dissipation fins to open at the maximum angle, starts the exhaust fan to quickly suck in the external air, and the external air quickly circulates inside the electric control box, thereby realizing the rapid cooling of the electric control box and avoiding affecting the overall service performance of the electric control box due to heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the first perspective of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the second perspective of the overall structure of the present invention;

[0027] Figure 3 is a sectional view of the first perspective of the overall structure of the present invention;

[0028] Figure 4 is Figure 3 an enlarged schematic view of part A in

[0029] Figure 5 is a schematic diagram of the internal structure of the left view of the present invention;

[0030] Figure 6 is Figure 5 an enlarged schematic view of part B in

[0031] Figure 7 is a schematic diagram of the exploded structure of the box body assembly of the present invention;

[0032] Figure 8 is a schematic diagram of the exploded structure of the damping assembly of the present invention;

[0033] Figure 9 is a schematic diagram of the exploded structure of the dust removal assembly of the present invention.

[0034] In the figure: 1. Box body assembly; 101. Box shell; 102. Working chamber; 103. Air storage chamber; 104. Microporous plate; 105. Movable door; 106. Heat dissipation holes; 107. Heat dissipation fins; 108. Glass window; 109. Partition board; 110. First solenoid valve; 111. Permanent magnet plate; 112. Movable slot; 2. Vibration damping assembly; 201. Bottom plate; 202. Vertical plate; 203. Electromagnetic plate; 204. First vibration damping spring; 205. Support plate; 206. Second vibration damping spring; 207. Vibration damping chamber; 208. Ventilation hole; 209. Connecting pipe; 3. Dust removal assembly; 301. Dust suction chamber; 302. Dust suction pipe; 303. Flared opening; 304. Cylindrical part; 305. Exhaust fan; 306. Conical part; 307. Dust storage chamber; 308. Air outlet pipe; 309. Second solenoid valve. Specific implementation mode

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0036] As Figure 1-2 shown, a protection mechanism for an electric control box of a crane includes a box body assembly 1. One end of the box body assembly 1 is sleeved with a vibration damping assembly 2, and the vibration damping assembly 2 is mainly used to reduce the vibration generated during the operation of the electric control box. One side of the box body assembly 1 is communicated with a dust removal assembly 3, and the dust removal assembly 3 is used to clean the dust particles adsorbed inside the electric control box.

[0037] As Figure 3As shown in the figure, the box body assembly 1 includes a box shell 101. The box shell 101 is a rectangular column cavity structure with one end open. The box shell 101 can wrap and protect the internal components. Inside the box shell 101, there is a working cavity 102 and a gas storage cavity 103. Inside the working cavity 102, there are various electrical components that work together to control and protect the electric control box. The setting of the gas storage cavity 103 facilitates the vibration damping assembly 2 to store and transfer air. The gas storage cavity 103 can exchange the gas in the working cavity 102. At the same time, a temperature sensor for monitoring the internal working temperature of the electric control box is provided inside the working cavity 102. A microporous plate 104 is connected between the working cavity 102 and the gas storage cavity 103. The microporous plate 104 is fixedly connected to the inner side wall of the box shell 101. Micron-level small holes with equal diameters are opened inside the microporous plate 104, dividing the flowing air into small airflows. When in use, according to the principle of fluid mechanics, the smaller the pipe diameter, the greater the resistance to air flow. Since the pore diameter of the micropores inside the microporous plate 104 is very small, it prevents the air from flowing quickly between the working cavity 102 and the gas storage cavity 103. Therefore, the micropores inside the microporous plate 104 can cause a damping force to be formed during the gas exchange process between the working cavity 102 and the gas storage cavity 103.

[0038] Further, as Figure 3-4 shown, the vibration damping assembly 2 includes a bottom plate 201. The bottom of the bottom plate 201 is in contact with the crane for fixedly placing the electric control box. A vertical plate 202 is fixedly provided on the bottom plate 201. The cross-section of the vertical plate 202 is set as a "┐" shaped structure. The space enclosed between the bottom plate 201 and the vertical plate 202 forms a vibration damping cavity 207. Electromagnetic plates 203 are provided at the four corners of the upper surface of the bottom plate 201. The opposite end faces of the electromagnetic plates 203 and the permanent magnet plate 111 have different magnetic polarities. When the electromagnetic plates 203 are not energized, the permanent magnet plate 111 is located at the topmost position of the movable slot 112. When the electromagnetic plates 203 start to be energized and the current gradually increases, the magnetic suction force exerted by the electromagnetic plates 203 on the permanent magnet plate 111 increases, and the permanent magnet plate 111 approaches the electromagnetic plates 203 until it closely adheres to the bottommost position of the movable slot 112. One side of the four electromagnetic plates 203 is fixedly connected to the bottom plate 201, and a first vibration damping spring 204 is fixedly provided on the other side of the four electromagnetic plates 203. The end of the first vibration damping spring 204 away from the electromagnetic plates 203 is fixedly provided with a support plate 205. The upper surface of the support plate 205 abuts against the bottom of the box shell 101. The support plate 205 plays a role in supporting and fixing the box shell 101, improving the overall stability of the electric control box. A second vibration damping spring 206 is fixedly provided at the center of the upper surface of the support plate 205. The other end of the second vibration damping spring 206 is fixedly connected to the bottom of the permanent magnet plate 111. When in use, the first vibration damping spring 204 and the second vibration damping spring 206 form a double-layer vibration damping spring that can absorb the continuous vibration generated by the electric control box, thereby avoiding the adverse effects caused by vibration.

[0039] Further, as Figure 4 、 Figure 8As shown, two ventilation holes 208 are formed in the vertical plate 202. The two ventilation holes 208 respectively penetrate the cavity wall of the damping cavity 207 and are distributed on the end faces opposite to each other in the damping cavity 207. One end of each of the two ventilation holes 208 is communicated with the damping cavity 207. The air inside the damping cavity 207 can flow through the inside of the ventilation hole 208. The other end of each of the two ventilation holes 208 is communicated with the inside of the connecting pipe 209. The end of the connecting pipe 209 away from the ventilation hole 208 is communicated with the air storage cavity 103. The connecting pipe 209 is used to compress the air to flow between the working cavity 102 and the air storage cavity 103, so as to ensure that the gas in the working cavity 102 and the air storage cavity 103 can be smoothly exchanged during the vibration process.

[0040] As Figure 7 shown, a movable door 105 is installed on one side of the box shell 101. The movable door 105 is hinged to the box shell 101. When it is necessary to perform operations such as maintenance, debugging, and replacement on the electrical components in the electric control box, opening the movable door 105 can provide a convenient operation space for the staff. Heat dissipation holes 106 are formed in the movable door 105. A plurality of heat dissipation fins 107 are evenly arranged inside the heat dissipation holes 106. The heat dissipation fins 107 are the same as or similar to the shutter structure. The staff controls the opening angle of the heat dissipation fins 107 according to actual needs. The larger the opening angle of the heat dissipation fins 107 of the electric control box, the better its heat dissipation effect. A glass window 108 is formed on the movable door 105 and on one side of the heat dissipation holes 106. The setting of the glass window 108 facilitates the real-time observation and management of the working conditions inside the electric control box. When the staff observes through the glass window 108 that there is more dust inside the electric control box, the next dust removal process can be carried out.

[0041] As Figure 3-4As shown in the figure, a partition plate 109 is provided on the side of the inner part of the box shell 101 away from the microplate 104. The partition plate 109 is fixedly connected to the inner side wall of the box shell 101. The bottom of the partition plate 109 is provided with first solenoid valves 110 in a rectangular array. The first solenoid valves 110 are used to control the gas inhalation. When the air pressure below the partition plate 109 is lower than the internal environmental pressure of the working chamber 102, the first solenoid valves 110 are controlled to open, allowing the gas to enter the lower side of the partition plate 109 through the first solenoid valves 110. A permanent magnet plate 111 is provided on the side of the partition plate 109 away from the working chamber 102. An activity groove 112 is formed on the side wall of the inner part of the box shell 101 away from the partition plate 109. The permanent magnet plate 111 is hermetically and slidably connected to the inner side wall of the activity groove 112. The permanent magnet plate 111 can move up and down inside the activity groove 112, and the movement range of the permanent magnet plate 111 is limited by the activity groove 112. When the energizing current of the electromagnetic plate 203 is increased, the permanent magnet plate 111 will compress the first damping spring 204 and the second damping spring 206, and move downward within the range of the activity groove 112 until it strikes the bottom end of the activity groove 112. When the electromagnetic plate 203 is de-energized, the first damping spring 204 and the second damping spring 206 will push the permanent magnet plate 111 to move away from the electromagnetic plate 203 until it strikes the top end of the activity groove 112 due to their own elastic forces. Therefore, by controlling the intermittent current input to the electromagnetic plate 203, the permanent magnet plate 111 reciprocates to compress the air in the cavities above and below the permanent magnet plate 111, and at the same time, the permanent magnet plate 111 strikes the top and bottom ends of the activity groove 112, causing the dust between the electrical components in the working chamber 102 to quickly fall onto the upper surface of the partition plate 109.

[0042] The weight sensor on the permanent magnet plate 111 is used to detect the weight of the dust accumulated on the upper surface of the permanent magnet plate 111. When the dust weight reaches the system preset value, it prompts the dust removal assembly 3 to start running. As Figure 5-6 As shown in FIGS. 5 and 9, the dust removal assembly 3 includes a dust suction chamber 301. The dust suction chamber 301 is a space formed by enclosing the partition plate 109, the permanent magnet plate 111 and the box shell 101, and is used to adsorb and store the dust in the working chamber 102. One side of the dust suction chamber 301 is communicated with a dust suction pipe 302. The dust suction pipe 302 penetrates and extends into the interior of the dust suction chamber 301. One end of the dust suction pipe 302 inside the dust suction chamber 301 is connected with a bell mouth 303. The end of the dust suction pipe 302 away from the dust suction chamber 301 is communicated with a cylindrical part 304. A second solenoid valve 309 is provided on the side of the dust suction pipe 302 close to the dust suction chamber 301 to control the opening or closing of the dust suction pipe 302. A suction fan 305 is provided on the side of the dust suction pipe 302 close to the cylindrical part 304. During use, the second solenoid valve 309 is opened, the suction fan 305 generates suction force, and the dust-containing gas inside the dust suction chamber 301 is sucked to the cylindrical part 304 through the bell mouth 303 and the dust suction pipe 302, achieving the dust removal effect.

[0043] Below the cylindrical part 304 is connected with a conical part 306, the other end of the conical part 306 is connected with a dust storage chamber 307, one end of the cylindrical part 304 away from the conical part 306 is connected with an air outlet pipe 308, the extending end of the air outlet pipe 308 is located inside the cylindrical part 304 and close to the conical part 306, the other end of the air outlet pipe 308 is communicated with the air storage cavity 103. When in use, after the dust-containing gas is introduced into the cylindrical part 304 from the dust suction pipe 302, the dust-containing gas rotates between the cylindrical part 304 and the air outlet pipe 308 to form a downward outer swirl. The dust suspended in the outer swirl moves towards the inner wall of the cylindrical part 304 under the action of centrifugal force and falls into the dust storage chamber 307 along with the outer swirl, while the purified clean gas forms an upward inner swirl and flows into the air storage cavity 103 through the air outlet pipe 308. The clean gas further cleans and cools the electrical components inside the working chamber 102 through the microporous plate 104.

[0044] When the protection mechanism of the electric control box is actually in use, during the operation of the crane, the vibration generated by itself is easily transmitted to the electric control box, thus causing the electric control box to vibrate to varying degrees. The housing 101 of the electric control box vibrates synchronously to generate a downward force. The bottom of the housing 101 compresses the support plate 205 and the first damping spring 204. At the same time, the housing 101 drives the permanent magnet plate 111 to compress the second damping spring 206. The first damping spring 204 and the second damping spring 206 form a double-layer damping spring to absorb vibration energy and damp and buffer the electric control box, playing a protective role for the electrical components inside the electric control box.

[0045] At the same time, after the air inside the damping cavity 207 is compressed, the gas inside enters the inside of the connecting pipe 209 along the air vent hole 208. The gas inside the connecting pipe 209 enters the inside of the air storage cavity 103. The gas volume inside the air storage cavity 103 increases and continuously discharges along the micropores inside the microporous plate 104 into the working chamber 102. Since the microporous plate 104 is provided with micron-sized holes of equal diameter, the flowing air can be divided into many small airflows. By using the "exhalation" operation of the damping cavity 207, the electrical components inside the working chamber 102 can be cleaned and cooled by wind. Due to the micropore damping force inside the microporous plate 104, the rapid inflow of air into the working chamber 102 is blocked, and further the rapid compression of the first damping spring 204 and the second damping spring 206 is blocked. This process can further enhance the damping effect.

[0046] When the first damping spring 204 and the second damping spring 206 rebound, the gas inside the working chamber 102 sequentially enters the damping chamber 207 through the microporous plate 104, the connecting pipe 209, and the ventilation hole 208. Since the aperture of the micropores formed inside the microporous plate 104 is very small, it prevents the gas from entering the damping chamber 207 too quickly. By using the "air intake" operation of the damping chamber 207, the rapid rebound of the electric control box is reduced. It should be noted that a filter screen is arranged below the microporous plate 104 to block dust and prevent dust from entering the inside of the air storage chamber 103.

[0047] In this cycle, after the first damping spring 204 and the second damping spring 206 absorb vibration, they compress the air inside the damping chamber 207 and "exhale" through the micropores. This process can dampen vibrations, clean, and dissipate heat from the electrical components inside the working chamber 102. When the first damping spring 204 and the second damping spring 206 release vibration, the damping chamber 207 "inhales" through the micropores. The micropores prevent the gas from quickly entering the damping chamber 207 and prevent the first damping spring 204 and the second damping spring 206 from rebounding quickly; the gas inside the damping chamber 207 forms a damping force during both "exhaling" and "inhaling", thus achieving the functions of vibration damping and buffering and preventing rebound, effectively reducing the vibration amplitude of the electric control box and protecting the service life and reliability of the electric control box.

[0048] During the above process, since the crane continuously generates vibrations during the entire operation process, driving the electric control box to vibrate continuously, which prompts the damping chamber 207 to maintain a cycle of "exhaling" and "inhaling". When the damping chamber 207 performs the "exhaling" and "inhaling" operations, a continuous airflow acts on the electrical components inside the working chamber 102. This airflow promotes the rapid circulation of hot air among the electrical components, takes away the generated heat, thus playing a role in heat dissipation. At the same time, this airflow can blow off the dust among the electrical components and accumulate it on the upper surface of the partition plate 109, facilitating the implementation of the next dust removal process.

[0049] When the staff observes through the glass window 108 that there is a lot of dust inside the electric control box, the crane stops the hoisting operation, controls the reciprocating movement of the permanent magnet plate 111, and knocks on the top and bottom of the movable slot 112, so that the dust between the electrical components in the working chamber 102 quickly falls and lands in the dust suction chamber 301. Specifically: control the electromagnetic plate 203 to pass intermittent current. When the electromagnetic plate 203 is energized, it generates a magnetic attraction force on the permanent magnet plate 111, thereby controlling the permanent magnet plate 111 to compress the first damping spring 204 and the second damping spring 206 and move downward within the range of the movable slot 112. The current gradually increases until the permanent magnet plate 111 knocks on the bottom of the movable slot 112. When the electromagnetic plate 203 is de-energized, the first damping spring 204 and the second damping spring 206 will push the permanent magnet plate 111 to move away from the electromagnetic plate 203 until the permanent magnet plate 111 knocks on the top of the movable slot 112 due to their own elastic forces, so that the permanent magnet plate 111 performs rapid reciprocating movement, and thus the dust between the electrical components quickly falls to the upper surface of the partition plate 109. In addition, during the up and down reciprocating movement of the permanent magnet plate 111, the damping chamber 207 synchronously performs a "breathing in and out" cycle process, driving the gas exchange between the working chamber 102 and the gas storage chamber 103, and further strengthening the functions of heat dissipation and dust removal.

[0050] At the same time, when the staff observes through the glass window 108 that all the dust inside the electric control box has fallen to the upper surface of the partition plate 109, control the permanent magnet plate 111 to move to the bottom of the movable slot 112. Since a negative pressure will be formed inside the dust suction chamber 301 during the downward movement of the permanent magnet plate 111, the first solenoid valve 110 is opened. At this time, the dust on the upper surface of the partition plate 109 will enter the inside of the dust suction chamber 301 through the first solenoid valve 110.

[0051] Then, detect the weight of the dust in the dust suction chamber 301 through the weight sensor. When the detected value reaches the preset value, use the dust removal assembly 3 to clean the dust inside the dust suction chamber 301. Specifically: close the first solenoid valve 110, open the second solenoid valve 309, start the exhaust fan 305 to generate suction, and suck the dust-containing gas inside the dust suction chamber 301 to the cylindrical part 304 through the bell mouth 303 and the dust suction pipe 302. The dust-containing gas rotates between the cylindrical part 304 and the air outlet pipe 308 to form a downward outer swirl. The dust suspended in the outer swirl moves towards the inner wall of the cylindrical part 304 under the action of centrifugal force and falls into the dust storage chamber 307 along with the outer swirl. The staff can regularly clean the dust storage chamber 307, and the purified clean gas forms an upward inner swirl and flows into the gas storage chamber 103 through the air outlet pipe 308.

[0052] The purified clean gas enters the interior of the gas storage cavity 103, and the microporous plate 104 is used to further clean and cool the electrical components inside the working cavity 102 by means of wind. It should be noted that a one-way valve is provided inside the air outlet pipe 308 to ensure that the gas can only flow from the cylindrical part 304 to the gas storage cavity 103, and the gas inside the gas storage cavity 103 cannot flow to the cylindrical part 304. During the above process, by setting the dust removal assembly 3, the dust inside the electric control box can be quickly cleaned, avoiding problems such as poor heat dissipation, decreased insulation performance, and poor contact caused by excessive dust accumulation.

[0053] The working environment of the crane is usually relatively harsh. During continuous operation, due to solar radiation and its own heat generation, the electric control box often gets severely heated, affecting the overall performance of the electric control box.

[0054] To solve the above problems, a temperature sensor is used to monitor the working temperature inside the electric control box. When the temperature reaches the preset value, it indicates that the electric control box is severely heated. First, control the opening angle of the cooling fins 107 to the maximum to allow external air to quickly flow into the working cavity 102 for heat dissipation. Second, control the first solenoid valve 110 and the second solenoid valve 309 to remain in the open state. At this time, the working cavity 102, the dust suction cavity 301, the cylindrical part 304, the air outlet pipe 308, and the gas storage cavity 103 are interconnected. Then, start the exhaust fan 305. The exhaust fan 305 can quickly suck in external air, and new air will continuously supplement the inside of the working cavity 102, prompting the external air to quickly flow along the path of the working cavity 102, the dust suction cavity 301, the cylindrical part 304, the air outlet pipe 308, and the gas storage cavity 103, thereby quickly cooling the electrical components inside the working cavity 102. Finally, when the temperature sensor detects that the temperature has dropped to the normal working temperature value, at this time, turn off the exhaust fan 305, the first solenoid valve 110, and the second solenoid valve 309, and the electric control box maintains normal operation. During the above process, through the mutual cooperation of components such as the dust suction cavity 301, the cooling fins 107, the exhaust fan 305, and the temperature sensor, after the temperature sensor monitors that the temperature reaches the preset value, it controls the cooling fins 107 to open at the maximum angle, starts the exhaust fan 305 to quickly suck in external air, and the external air quickly circulates inside the electric control box, thereby achieving the rapid cooling of the electric control box and avoiding the influence of heat on the overall service performance of the electric control box. Embodiment 2

[0055] This embodiment discloses a protection method for a protection mechanism of a crane electric control box, including the following steps:

[0056] Step 1: The housing 101 of the electric control box vibrates synchronously to generate a downward force. The bottom of the housing 101 compresses the support plate 205 and the first damping spring 204. At the same time, the housing 101 drives the permanent magnet plate 111 to compress the second damping spring 206. The gas inside the damping cavity 207 is compressed and then enters the gas storage cavity 103. The gas continuously discharges along the micropores inside the microporous plate 104 and enters the working cavity 102.

[0057] Step 2: When the first damping spring 204 and the second damping spring 206 rebound, the gas inside the working cavity 102 sequentially enters the damping cavity 207 through the microporous plate 104, the connecting pipe 209, and the ventilation hole 208. A filter screen is arranged below the microporous plate 104 to block dust and prevent dust from entering the gas storage cavity 103.

[0058] Step 3: Control the reciprocating movement of the permanent magnet plate 111 to strike the top and bottom of the movable slot 112, so that the dust between the electrical components in the working cavity 102 quickly falls and lands in the dust suction cavity 301. Close the first solenoid valve 110, open the second solenoid valve 309, and start the exhaust fan 305. The exhaust fan 305 generates suction, and sucks the dust-containing gas inside the dust suction cavity 301 to the cylindrical part 304 through the bell mouth 303 and the dust suction pipe 302. The dust-containing gas rotates between the cylindrical part 304 and the air outlet pipe 308 to form a downward outer swirl flow, and the dust falls into the dust storage chamber 307, and the clean gas flows into the gas storage cavity 103.

[0059] Step 4: Use the temperature sensor to monitor the working temperature inside the electric control box. When the temperature reaches the preset value, control the opening angle of the heat dissipation fins 107 to be the largest. The first solenoid valve 110 and the second solenoid valve 309 remain in the open state, and start the exhaust fan 305 to promote the rapid flow of external air along the path of the working cavity 102, the dust suction cavity 301, the cylindrical part 304, the air outlet pipe 308, and the gas storage cavity 103.

[0060] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protection mechanism for a crane electric control box, comprising a box assembly (1), characterized in that: The box assembly (1) is sleeved with a vibration reduction assembly (2), and one side of the box assembly (1) is connected to a dust removal assembly (3); The box assembly (1) comprises a box shell (101), wherein the box shell (101) is a rectangular column hollow structure with one end open; The vibration reduction assembly (2) comprises a bottom plate (201), a vertical plate (202) being fixedly provided on the bottom plate (201), the cross section of the vertical plate (202) being arranged in a "┐"-shaped structure, and the space enclosed between the bottom plate (201) and the vertical plate (202) forming a vibration reduction cavity (207); The dust removal component (3) comprises a dust suction chamber (301), one side of the dust suction chamber (301) is connected to a dust suction pipe (302), the dust suction pipe (302) penetrates and extends into the interior of the dust suction chamber (301), one end of the dust suction pipe (302) located inside the dust suction chamber (301) is connected to a bell mouth (303), one end of the dust suction pipe (302) away from the dust suction chamber (301) is connected to a cylindrical portion (304), a second solenoid valve (309) is provided on a side of the dust suction chamber (301) inside the dust suction pipe (302), and an exhaust fan (305) is provided on a side of the dust suction pipe (302) near the cylindrical portion (304); A plurality of electromagnetic plates (203) are provided on the bottom plate (201); the relative end surfaces of the electromagnetic plates (203) and the permanent magnet plate (111) have different magnetic properties; a first damping spring (204) is fixedly provided at one end of the electromagnetic plate (203) away from the bottom plate (201); a support plate (205) is fixedly provided at one end of the first damping spring (204) away from the electromagnetic plate (203); the upper surface of the support plate (205) is in contact with the bottom of the box shell (101); a second damping spring (206) is fixedly provided on the upper surface of the support plate (205); the other end of the second damping spring (206) is fixedly connected to the bottom of the permanent magnet plate (111); the electromagnetic plate (203) is controlled to pass intermittent current, and when the electromagnetic plate (203) is energized, a magnetic attraction force is generated on the permanent magnet plate (111); Two vent holes (208) are provided on the vertical plate (202), one end of the two vent holes (208) is connected to the vibration reduction chamber (207), and the other end is connected to the inside of the connecting pipe (209), and the end of the connecting pipe (209) away from the vent holes (208) is connected to the air storage chamber (103).

2. The protection mechanism for the crane electric control box according to claim 1 is characterized in that: A working chamber (102) and an air storage chamber (103) are provided inside the box shell (101); a microporous plate (104) is connected between the working chamber (102) and the air storage chamber (103); the microporous plate (104) is fixedly connected to the inner side wall of the box shell (101); and a temperature sensor is provided inside the working chamber (102).

3. The protection mechanism for the crane electric control box according to claim 2 is characterized in that: An isolation plate (109) is provided on a side of the box shell (101) away from the microporous plate (104), the isolation plate (109) is fixedly connected to the inner side wall of the box shell (101), a first solenoid valve (110) is installed in a rectangular array on the bottom of the isolation plate (109), a permanent magnet plate (111) is provided on a side of the isolation plate (109) away from the working chamber (102), a movable groove (112) is provided on the side wall of the box shell (101) away from the isolation plate (109), the permanent magnet plate (111) is sealingly and slidably connected to the inner side wall of the movable groove (112), and a weighing sensor is provided on the permanent magnet plate (111).

4. The protection mechanism for the crane electric control box according to claim 2 is characterized in that: A movable door (105) is installed on one side of the box shell (101); the movable door (105) and the box shell (101) are hinged to each other; a heat dissipation hole (106) is provided on the movable door (105); a plurality of heat dissipation blades (107) are evenly arranged inside the heat dissipation hole (106); and a glass window (108) is provided on one side of the movable door (105) close to the heat dissipation hole (106).

5. The protection mechanism for the crane electric control box according to claim 1 is characterized in that: The conical portion (306) is connected to the bottom of the cylindrical portion (304), the other end of the conical portion (306) is connected to a dust storage chamber (307), the end of the cylindrical portion (304) away from the conical portion (306) is connected to an air outlet pipe (308), the extended end of the air outlet pipe (308) is located inside the cylindrical portion (304) and close to the conical portion (306), and the other end of the air outlet pipe (308) is connected to the air storage chamber (103).

6. A protection method for a protection mechanism of a crane electric control box according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: The housing (101) of the electric control box vibrates synchronously to generate a downward force, and the bottom of the housing (101) compresses the support plate (205) and the first damping spring (204). At the same time, the housing (101) drives the permanent magnet plate (111) to compress the second damping spring (206). The gas inside the damping chamber (207) is compressed and enters the gas storage chamber (103). The gas is continuously discharged along the micropores inside the microporous plate (104) into the working chamber (102); Step 2: When the first damping spring (204) and the second damping spring (206) rebound, the gas inside the working chamber (102) enters the damping chamber (207) through the microporous plate (104), the connecting pipe (209) and the vent hole (208) in sequence, and a filter is provided below the microporous plate (104) to block dust and prevent dust from entering the gas storage chamber (103); Step 3: Control the permanent magnet plate (111) to reciprocate and strike the top and bottom of the movable groove (112) to make the dust between the electrical components in the working chamber (102) fall quickly and fall into the dust suction chamber (301), close the first solenoid valve (110), open the second solenoid valve (309), start the exhaust fan (305), and the exhaust fan (305) generates suction to suck the dust-containing gas inside the dust suction chamber (301) into the cylindrical portion (304) through the bell mouth (303) and the dust suction pipe (302), and the dust-containing gas rotates between the cylindrical portion (304) and the air outlet pipe (308) to form a downward external vortex, and the dust falls into the dust storage chamber (307), and the clean gas flows into the gas storage chamber (103); Step 4: Use a temperature sensor to monitor the working temperature inside the electric control box. When the temperature reaches a preset value, control the opening angle of the heat dissipation blade (107) to be the maximum, keep the first solenoid valve (110) and the second solenoid valve (309) in an open state, start the exhaust fan (305), and promote the external air to flow quickly along the path of the working chamber (102), the dust suction chamber (301), the cylindrical portion (304), the air outlet pipe (308) and the air storage chamber (103).

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