Protection mechanism and protection method for electric control box of crane

Abstract

The invention belongs to the field of electric control boxes, and particularly relates to a protection mechanism and method for a crane electric control box, the protection mechanism comprises a box body assembly, the box body assembly is sleeved with a vibration reduction assembly, and one side of the box body assembly communicates with a dust removal assembly; the box body assembly comprises a box shell, and the box shell is of a rectangular column cavity structure with an opening in one end; the vibration reduction assembly comprises a bottom plate, a vertical plate is fixedly arranged on the bottom plate, the section of the vertical plate is of an inverted-L-shaped structure, and a vibration reduction cavity is formed in the space defined by the bottom plate and the vertical plate; the dust removal assembly comprises a dust collection cavity, one side of the dust collection cavity communicates with a dust collection pipe, the dust collection pipe penetrates through and extends into the dust collection cavity, the end, located in the dust collection cavity, of the dust collection pipe is connected with a horn mouth, and the end, away from the dust collection cavity, of the dust collection pipe communicates with a cylinder part; the protection mechanism of the electric control box is good in vibration reduction effect and high in heat dissipation capability, and dust in the electric control box can be rapidly cleaned.

Description

Technical Field

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

[0002] Crane is a mechanical equipment used for lifting and aerial operations. It is widely used in many fields such as construction, ports, logistics, and mining. The crane mainly includes a load-bearing structure, an operating mechanism, a lifting mechanism, and an electrical control system. The electric control box is the core component of the crane's electrical control system. It controls the start, stop, and speed regulation of the motor to achieve various actions of the crane, such as lifting, lowering, walking, and rotating. As an indispensable and important equipment for the crane, the electric control box is a key component to ensure the safe and reliable operation of the crane.

[0003] A 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 blocks are symmetrically fixedly connected to the upper end of the mounting frame, and a pair of card holders that are matched with the card blocks are fixedly connected to the back of the electric control box body, and a vertical card slot that engages with the card block is opened on the lower end surface of the card holder; a horizontal groove is provided on one relative inner wall of the card slot, and a movable block is slidably connected in the groove, and the two movable blocks are respectively arranged on both sides of the card block, and an elastic structure is connected between one end of the movable block and the inner wall of the groove; the shock-absorbing effect of the electric control box is poor, especially in an environment with frequent vibration, the wiring terminals in the electric control box are loose, which may cause poor signal contact and affect normal use.

[0004] The operating characteristics of a crane are characterized by a distinct working cycle. Each cycle usually includes different working stages such as lifting, translation, and lowering. Vibration will continue to be generated during the entire operation process. The stress and fatigue caused by long-term vibration will accelerate the aging process of electrical components, and cause fatigue cracks and deformation in the box structure of the electric control box, reducing the service life and reliability of the electric control box. In addition, the working environment of the crane is dusty, and dust easily accumulates on electrical components, resulting in poor heat dissipation, reduced insulation performance, poor contact, and other problems, which accelerates the damage process of the electric control box and increases 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 a crane electric control box to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a protection mechanism for a crane electric control box, comprising a box assembly, the box assembly is sleeved with a vibration reduction assembly, and one side of the box assembly is connected to a dust removal assembly; The box assembly comprises a box shell, which is a rectangular column cavity structure with one end open; The vibration reduction assembly comprises a bottom plate, on which a vertical plate is fixed, the cross section of the vertical plate is set to a "┐"-shaped structure, and the space enclosed between the bottom plate and the vertical plate forms a vibration reduction cavity; The dust removal assembly includes a dust suction chamber, one side of the dust suction chamber is connected to a dust suction pipe, the dust suction pipe penetrates and extends to the interior of the dust suction chamber, one end of the dust suction pipe inside the dust suction chamber is connected to a bell mouth, the end of the dust suction pipe away from the dust suction chamber is connected to a cylindrical part, a second solenoid valve is provided in the dust suction pipe on the side close to the dust suction chamber, and an exhaust fan is provided in the dust suction pipe on the side close to the cylindrical part.

[0007] Preferably, a working chamber and an air storage chamber are provided inside the box shell, a microporous plate is connected between the working chamber and the air storage chamber, the microporous plate is fixedly connected to the inner side wall of the box shell, and a temperature sensor is provided inside the working chamber.

[0008] Preferably, an isolation plate is provided on the side of the box shell away from the microporous plate, the isolation plate is fixedly connected to the inner side wall of the box shell, a first solenoid valve is installed in a rectangular array on the bottom of the isolation plate, a permanent magnet plate is provided on the side of the isolation plate away from the working chamber, a movable groove is opened on the side wall of the box shell away from the isolation plate, the permanent magnet plate is sealingly and slidably connected to the inner side wall of the movable groove, and a weighing sensor is provided on the permanent magnet plate.

[0009] Preferably, a movable door is installed on one side of the box shell, the movable door and the box shell are hinged to each other, a heat dissipation hole is opened on the movable door, a plurality of heat dissipation blades are evenly arranged inside the heat dissipation hole, and a glass window is opened on the side of the movable door close to the heat dissipation hole.

[0010] Preferably, a plurality of electromagnetic plates are provided on the bottom plate, and the relative end faces of the electromagnetic plate and the permanent magnet plate have different magnetic properties. A first damping spring is fixedly provided at one end of the electromagnetic plate away from the bottom plate, and a support plate is fixedly provided at one end of the first damping spring away from the electromagnetic plate. The upper surface of the support plate is in contact with the bottom of the box shell, and a second damping spring is fixedly provided on the upper surface of the support plate, and the other end of the second damping spring is fixedly connected to the bottom of the permanent magnet plate.

[0011] Preferably, two vents are provided on the vertical plate, one end of the two vents is connected to the vibration damping chamber, and the other end is connected to the inside of the connecting pipe, and the end of the connecting pipe away from the vents is connected to the air storage chamber.

[0012] Preferably, a conical portion is connected below the cylindrical portion, a dust storage chamber is connected to the other end of the conical portion, an air outlet pipe is connected to one end of the cylindrical portion away from the conical portion, an extended end of the air outlet pipe is located inside the cylindrical portion and close to the conical portion, and the other end of the air outlet pipe is communicated with the air storage chamber.

[0013] The present invention also discloses a protection method for a crane electric control box protection mechanism, comprising the following steps: Step 1: The shell of the electric control box vibrates synchronously to generate a downward force. The bottom of the shell compresses the support plate and the first damping spring. At the same time, the shell drives the permanent magnet plate to compress the second damping spring. The gas inside the damping cavity is compressed and enters the gas storage cavity. The gas is continuously discharged into the working cavity along the micropores inside the microporous plate. Step 2: When the first damping spring and the second damping spring rebound, the gas inside the working chamber enters the damping chamber through the microporous plate, the connecting pipe and the vent hole in sequence, and a filter is arranged under the microporous plate to block dust and prevent dust from entering the gas storage chamber; Step 3: Control the reciprocating motion of the permanent magnet plate to knock the top and bottom of the movable groove, so that the dust between the electrical components in the working chamber falls quickly and falls into the dust collection chamber, close the first solenoid valve, open the second solenoid valve, start the exhaust fan, the exhaust fan generates suction, and sucks the dust-containing gas inside the dust collection chamber to the cylinder part through the bell mouth and the dust collection pipe. The dust-containing gas rotates between the cylinder part and the air outlet pipe to form a downward external vortex flow, and the dust falls into the dust storage chamber, and the clean gas flows into the gas storage chamber; 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 blade to the maximum, keep the first solenoid valve and the second solenoid valve in the open state, start the exhaust fan, and promote the external air to flow quickly along the path of the working chamber, the dust suction chamber, the cylinder, the air outlet pipe and the air storage chamber.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application sets a first damping spring, a second damping spring, a microporous plate, a damping chamber, an air storage chamber and a working chamber to cooperate with each other. The micropores inside the microporous plate can form a damping force in the gas exchange process between the working chamber and the air storage chamber. The damping force plays a role in vibration reduction and rebound prevention, 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 of gas between the working chamber and the air storage chamber, a continuous airflow will be generated to promote the rapid circulation of hot air between the electrical components inside the working chamber, thereby playing a role in heat dissipation and dust removal.

[0015] 2. The present application sets the electromagnetic plate, permanent magnet plate, isolation plate, first electromagnetic valve and dust suction chamber and other components to cooperate with each other, control the electromagnetic plate to pass intermittent current, so that the permanent magnet plate knocks the top and bottom of the movable groove, and the dust between the electrical components in the working chamber quickly falls to the upper surface of the isolation plate, and then opens the first electromagnetic valve, and the dust suction chamber in the negative pressure environment quickly cleans the dust inside the electric control box to avoid the problem of excessive dust accumulation inside the electric control box. At the same time, the reciprocating motion of the permanent magnet plate compresses the air in the cavities on the upper and lower sides of the permanent magnet plate, causing the air pressure inside the vibration reduction chamber to change, driving the gas exchange between the working chamber and the air storage chamber, and further enhancing the heat dissipation and dust removal effects.

[0016] 3. The present application sets up a dust suction chamber, heat dissipation blades, an exhaust fan, a 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 chamber to the cylindrical part. Under the action of centrifugal force, the dust-containing gas falls into the dust storage chamber, and the purified gas flows into the gas storage chamber through the outlet pipe, so as to quickly clean the dust inside the dust suction chamber. At the same time, when the temperature sensor detects that the temperature reaches the preset value, the heat dissipation blade is controlled to open to the maximum angle, and the exhaust fan is started to quickly inhale the external air. The external air circulates quickly inside the electric control box, thereby realizing rapid cooling of the electric control box and avoiding the overall performance of the electric control box being affected by heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle; Figure 3 It is a cross-sectional view of the overall structure of the present invention from a first viewing angle; Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 It is a left-side internal structure schematic diagram of the present invention; Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle; Figure 7 It is a schematic diagram of the exploded structure of the box assembly of the present invention; Figure 8 It is a schematic diagram of the explosion structure of the vibration reduction assembly of the present invention; Fig. 9 It is a schematic diagram of the explosion structure of the dust removal component of the present invention.

[0018] In the figure: 1. Box assembly; 101. Box shell; 102. Working chamber; 103. Air storage chamber; 104. Microporous plate; 105. Movable door; 106. Heat dissipation hole; 107. Heat dissipation blade; 108. Glass window; 109. Isolation plate; 110. First electromagnetic valve; 111. Permanent magnetic plate; 112. Movable groove; 2. Vibration reduction assembly; 201. Bottom plate; 202. Vertical plate; 203. Electromagnetic plate ; 204, first damping spring; 205, support plate; 206, second damping spring; 207, damping chamber; 208, vent; 209, connecting pipe; 3, dust removal assembly; 301, dust suction chamber; 302, dust suction pipe; 303, bell mouth; 304, cylinder; 305, exhaust fan; 306, cone; 307, dust storage chamber; 308, air outlet pipe; 309, second solenoid valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0020] like Figure 1-2 As shown, a protective mechanism for an electric control box of a crane includes a box assembly 1, one end of which is sleeved with a vibration reduction assembly 2, wherein the vibration reduction assembly 2 is mainly used to reduce the vibration generated by the electric control box during operation, and one side of the box assembly 1 is connected to a dust removal assembly 3, and the dust removal assembly 3 is used to clean the dust particles adsorbed inside the electric control box.

[0021] like Figure 3As shown, the box assembly 1 includes a box shell 101, which is a rectangular column hollow cavity structure with one end open. The box shell 101 can wrap and protect the internal components. A working chamber 102 and an air storage chamber 103 are arranged inside the box shell 101. A variety of electrical components are arranged inside the working chamber 102, which work together to achieve control and protection of the electric control box. The setting of the air storage chamber 103 is convenient for the vibration reduction assembly 2 to store and transfer air. The air storage chamber 103 can exchange the gas in the working chamber 102. At the same time, a temperature sensor for monitoring the internal working temperature of the electric control box is arranged inside the working chamber 102. 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. The microporous plate 104 is provided with micron-sized holes of equal diameter to divide the circulating air into small airflows. When in use, according to the principles of fluid mechanics, the smaller the tube diameter, the greater the resistance to air circulation. Since the aperture of the micropores inside the microporous plate 104 is very small, the air is prevented from flowing quickly between the working chamber 102 and the air storage chamber 103. Therefore, the micropores inside the microporous plate 104 can form a damping force during the exchange process of the gases in the working chamber 102 and the air storage chamber 103.

[0022] Furthermore, if Figure 3-4 As shown, the vibration reduction assembly 2 includes a base plate 201, the bottom of the base plate 201 contacts the crane for fixing and placing the electric control box, and a vertical plate 202 is fixed on the base plate 201. The cross section of the vertical plate 202 is set to a "┐"-shaped structure, and the space enclosed between the base plate 201 and the vertical plate 202 forms a vibration reduction cavity 207. Electromagnetic plates 203 are provided at the four corners of the upper surface of the base plate 201. The relative end surfaces of the electromagnetic plates 203 and the permanent magnet plates 111 have different magnetic properties. When the electromagnetic plates 203 are not energized, the permanent magnet plates 111 are located at the top of the movable groove 112. When the electromagnetic plates 203 start to be energized and the current gradually increases, the magnetic attraction exerted by the electromagnetic plates 203 on the permanent magnet plates 111 increases, and the permanent magnet plates 111 approach the electromagnetic plates 203 until they are close to the bottom of the movable groove 112. One side of the four electromagnetic plates 203 is fixed to the base plate 201 The first damping spring 204 is fixedly provided on the other side of the four electromagnetic plates 203, and 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 conflicts with the bottom of the box shell 101, and the support plate 205 supports and fixes the box shell 101, thereby improving the overall stability of the electric control box. A second damping spring 206 is fixedly provided at the center of the upper surface of the support plate 205, and the other end of the second damping spring 206 is fixedly connected to the bottom of the permanent magnet plate 111. When in use, the first damping spring 204 and the second damping spring 206 form a double-layer damping spring that can absorb the vibration continuously generated by the electric control box, thereby avoiding the adverse effects caused by the vibration.

[0023] Furthermore, if Figure 4 , Figure 8As shown, two air vents 208 are provided on the vertical plate 202, and the two air vents 208 respectively penetrate the cavity wall of the vibration damping cavity 207 and are distributed on the end surfaces opposite to each other in the vibration damping cavity 207. One end of the two air vents 208 is connected with the vibration damping cavity 207, and the air in the vibration damping cavity 207 can flow through the air vents 208. The other ends of the two air vents 208 are connected with the interior of a connecting pipe 209, and one end of the connecting pipe 209 away from the air vents 208 is connected with the air storage cavity 103. The connecting pipe 209 is used for compressed air to circulate between the working cavity 102 and the air storage cavity 103, thereby ensuring that the gas in the working cavity 102 and the air storage cavity 103 can be smoothly exchanged during the vibration process.

[0024] like Figure 7 As shown, a movable door 105 is installed on one side of the box shell 101, and the movable door 105 is hinged with the box shell 101. When it is necessary to inspect, debug, replace, etc. the electrical components in the electric control box, opening the movable door 105 can provide a convenient operating space for the staff. A heat dissipation hole 106 is opened on the movable door 105, and a plurality of heat dissipation blades 107 are evenly arranged inside the heat dissipation hole 106. The heat dissipation blades 107 have the same or similar structure as the shutters. The staff controls the opening angle of the heat dissipation blades 107 according to actual needs. The larger the opening angle of the heat dissipation blades 107 of the electric control box, the better the heat dissipation effect. A glass window 108 is opened on the movable door 105 and located on one side of the heat dissipation hole 106. The setting of the glass window 108 facilitates real-time observation and management of the internal working conditions of the electric control box. When the staff observes that there is a lot of dust inside the electric control box through the glass window 108, the next dust removal process can be carried out.

[0025] like Figure 3-4As shown, an isolation plate 109 is provided on the side of the box shell 101 away from the microporous plate 104, and the isolation plate 109 is fixedly connected to the inner side wall of the box shell 101. The bottom of the isolation plate 109 is installed with a first solenoid valve 110 in a rectangular array. The first solenoid valve 110 is used to control gas suction. When the air pressure on the lower side of the isolation plate 109 is lower than the internal ambient pressure of the working chamber 102, the first solenoid valve 110 is controlled to open, allowing the gas to pass through the first solenoid valve 110 to enter the lower side of the isolation plate 109. A permanent magnet plate 111 is provided on the side of the isolation plate 109 away from the working chamber 102, and a movable groove 112 is opened on the side wall of the box shell 101 away from the isolation plate 109. The permanent magnet plate 111 is sealed and slidably connected to the inner side wall of the movable groove 112, and the permanent magnet plate 111 can move up and down inside the movable groove 112, and the movable groove 112 is used to limit the moving range of the permanent magnet plate 111. When the 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 movable groove 112 until it hits the bottom of the movable groove 112; when the electromagnetic plate 203 is powered off, the first damping spring 204 and the second damping spring 206 will push the permanent magnet plate 111 away from the electromagnetic plate 203 due to their own elastic force until it hits the top of the movable groove 112. Therefore, the electromagnetic plate 203 is controlled to pass intermittent current, so that the permanent magnet plate 111 reciprocates to compress the air in the upper and lower cavities of the permanent magnet plate 111, and at the same time, the permanent magnet plate 111 hits the top and bottom of the movable groove 112, so that the dust between the electrical components in the working chamber 102 quickly falls to the upper surface of the isolation plate 109.

[0026] The weight of dust accumulated on the surface of the permanent magnetic plate 111 is detected by the weighing sensor on the permanent magnetic plate 111. When the weight of the dust reaches a preset value of the system, the dust removal component 3 is prompted to start operating. Figure 5-6 As shown in Figures 9, the dust removal component 3 includes a dust suction chamber 301, which is a space enclosed by the isolation plate 109, the permanent magnetic plate 111 and the box shell 101, and is used to absorb and store dust in the working chamber 102. A dust suction pipe 302 is connected to one side of the dust suction chamber 301, and the dust suction pipe 302 passes through and extends to the inside of the dust suction chamber 301. One end of the dust suction pipe 302 in the dust suction chamber 301 is connected with a bell mouth 303, and the end of the dust suction pipe 302 away from the dust suction chamber 301 is connected with a cylindrical portion 304, and a second solenoid valve 309 is provided on the inside of the dust suction pipe 302 near the dust suction chamber 301, and the second solenoid valve 309 is used to control the opening or closing of the dust suction pipe 302, and an exhaust fan 305 is provided on the inside of the dust suction pipe 302 near the cylindrical portion 304. When in use, the second solenoid valve 309 is opened, the exhaust fan 305 generates suction, and sucks the dust-containing gas inside the dust suction chamber 301 to the cylindrical portion 304 through the bell mouth 303 and the dust suction pipe 302, thereby achieving the dust removal effect.

[0027] The conical portion 306 is connected to the bottom of the cylindrical portion 304, and the other end of the conical portion 306 is connected to the dust storage chamber 307. The end of the cylindrical portion 304 away from the conical portion 306 is connected to the outlet pipe 308. The extended end of the outlet pipe 308 is located inside the cylindrical portion 304 and close to the conical portion 306. The other end of the outlet pipe 308 is connected to the air storage chamber 103. When in use, after the dust-laden gas is introduced into the cylindrical portion 304 from the dust suction pipe 302, the dust-laden gas rotates between the cylindrical portion 304 and the outlet pipe 308 to form a downward external vortex. The dust suspended in the external vortex moves toward the inner wall of the cylindrical portion 304 under the action of centrifugal force and falls into the dust storage chamber 307 with the external vortex. The purified clean gas forms an upward internal vortex and flows into the air storage chamber 103 through the outlet pipe 308. The clean gas further cleans and cools the electrical components inside the working chamber 102 through the microporous plate 104.

[0028] When the protective mechanism of the electric control box is actually used, the vibration generated by the crane itself is easily transmitted to the electric control box during operation, thereby causing the electric control box to vibrate to varying degrees. The shell 101 of the electric control box vibrates synchronously to generate a downward force. The bottom of the shell 101 compresses the support plate 205 and the first damping spring 204. At the same time, the shell 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 to reduce vibration and buffer the electric control box, thereby protecting the electrical components inside the electric control box.

[0029] At the same time, after the air inside the vibration damping chamber 207 is compressed, the gas inside enters the connecting tube 209 along the vent hole 208, and the gas inside the connecting tube 209 enters the gas storage chamber 103. The gas volume inside the gas storage chamber 103 increases and is continuously discharged into the working chamber 102 along the micropores inside the microporous plate 104. Since the microporous plate 104 has micron-sized holes of equal diameter, the circulating air can be divided into many small air streams. The "exhalation" operation of the vibration damping chamber 207 can be used to clean and cool the electrical components inside the working chamber 102. Due to the damping force of the micropores inside the microporous plate 104, the air is prevented from flowing into the working chamber 102 quickly, thereby preventing the first vibration damping spring 204 and the second vibration damping spring 206 from being compressed quickly. This process can further enhance the vibration damping effect.

[0030] 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 turn. Since the micropores opened inside the microporous plate 104 have very small apertures, the gas is prevented from entering the damping chamber 207 too quickly. The "inhalation" operation of the damping chamber 207 is used to reduce the rapid rebound of the electric control box. It should be noted that a filter is provided under the microporous plate 104 to block dust and prevent dust from entering the gas storage chamber 103.

[0031] In this cycle, the first damping spring 204 and the second damping spring 206 compress the air inside the damping chamber 207 after absorbing the vibration and "exhale" through the micropores. This process can reduce vibration, clean and dissipate heat for the electrical components inside the working chamber 102. When the first damping spring 204 and the second damping spring 206 release the vibration, the damping chamber 207 "inhales" through the micropores. The micropores prevent the gas from quickly entering the damping chamber 207, preventing the first damping spring 204 and the second damping spring 206 from rebounding quickly. The gas inside the damping chamber 207 will form a damping force between "exhalation and exhalation", thereby achieving the effect of vibration reduction and 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.

[0032] In the above process, since the crane continuously generates vibrations during the entire operation process, the electric control box is driven to vibrate continuously, thereby prompting the vibration reduction chamber 207 to maintain a "breathing and breathing" cycle. When the vibration reduction chamber 207 is performing the "exhaling" and "inhaling" operations, a continuous airflow will be generated to act on the electrical components inside the working chamber 102. The airflow promotes the rapid circulation of hot air between the electrical components and takes away the generated heat, thereby playing a role in heat dissipation. At the same time, the airflow can blow off the dust between the electrical components and accumulate it on the upper surface of the isolation plate 109, which is convenient for the implementation of the next dust removal process.

[0033] 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 lifting operation, controls the permanent magnetic plate 111 to reciprocate, and knocks the top and bottom of the movable groove 112, so that the dust between the electrical components in the working chamber 102 falls quickly and falls into the dust suction chamber 301. Specifically, the electromagnetic plate 203 is controlled to pass intermittent current. When the electromagnetic plate 203 is energized, a magnetic attraction force is generated on the permanent magnetic plate 111, thereby controlling the permanent magnetic plate 111 to compress the first damping spring 204 and the second damping spring 206. The spring 206 moves downward within the range of the movable groove 112, and the current gradually increases until the permanent magnet plate 111 hits the bottom of the movable groove 112. When the electromagnetic plate 203 is powered off, the first damping spring 204 and the second damping spring 206 will push the permanent magnet plate 111 away from the electromagnetic plate 203 due to their own elastic force until the permanent magnet plate 111 hits the top of the movable groove 112, so that the permanent magnet plate 111 performs rapid reciprocating motion, so that the dust between the electrical components quickly falls to the upper surface of the isolation plate 109. In addition, during the reciprocating motion of the permanent magnet plate 111, the damping chamber 207 synchronously performs a "breathing and breathing" cycle, driving the gas exchange between the working chamber 102 and the gas storage chamber 103, and further enhancing the heat dissipation and dust removal effects.

[0034] At the same time, when the staff observes through the glass window 108 that all the dust inside the electrical control box has fallen to the upper surface of the isolation plate 109, the permanent magnet plate 111 is controlled to move to the bottom of the movable groove 112. As the permanent magnet plate 111 moves downward, a negative pressure is formed inside the dust suction chamber 301, and the first solenoid valve 110 opens. At this time, the dust on the upper surface of the isolation plate 109 enters the dust suction chamber 301 through the first solenoid valve 110.

[0035] Then, the weight of the dust in the dust suction chamber 301 is detected by a weighing sensor. When the detected value reaches a preset value, the dust removal component 3 is used 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 into the cylinder 304 through the bell mouth 303 and the dust suction pipe 302. The dust-containing gas rotates between the cylinder 304 and the air outlet pipe 308 to form a downward external vortex. The dust suspended in the external vortex moves to the inner wall of the cylinder 304 under the action of centrifugal force, and falls into the dust storage chamber 307 with the external vortex. The staff can clean the dust storage chamber 307 regularly, and the purified clean gas forms an upward internal vortex and flows into the air storage chamber 103 through the air outlet pipe 308.

[0036] The purified clean gas enters the gas storage chamber 103, and passes through the microporous plate 104 to further clean and cool the electrical components in the working chamber 102. It should be noted that a one-way valve is provided inside the gas outlet pipe 308 to ensure that the gas can only flow from the cylinder 304 to the gas storage chamber 103, while the gas inside the gas storage chamber 103 cannot flow to the cylinder 304. In the above process, by setting the dust removal component 3, the dust inside the electric control box is quickly cleaned to avoid the occurrence of problems such as poor heat dissipation, reduced insulation performance, and poor contact caused by excessive dust accumulation.

[0037] The working environment of a crane is usually harsh. During continuous operation, due to solar radiation and self-heating, the electric control box often becomes seriously heated, affecting the overall performance of the electric control box.

[0038] In order to solve the above problem, a temperature sensor is used to monitor the working temperature inside the electric control box. When the temperature reaches the preset value, it means that the electric control box is seriously heated. First, the opening angle of the heat dissipation blade 107 is controlled to be the maximum, so that the external air can quickly flow into the working chamber 102 for heat dissipation. Secondly, the first solenoid valve 110 and the second solenoid valve 309 are controlled to remain in an open state. At this time, the working chamber 102, the dust suction chamber 301, the cylindrical portion 304, the air outlet pipe 308 and the air storage chamber 103 are interconnected. Then the exhaust fan 305 is started. The exhaust fan 305 can quickly inhale the external air, and the new air will be continuously replenished into the working chamber 102, so as to promote the external air to flow quickly on 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, thereby quickly cooling the electrical components inside the working chamber 102. Finally, when the temperature sensor detects that the temperature drops to the normal operating temperature value, the exhaust fan 305, the first solenoid valve 110 and the second solenoid valve 309 are closed, and the electric control box maintains normal operation. In the above process, by setting the dust suction chamber 301, the heat dissipation blade 107, the exhaust fan 305, the temperature sensor and other components to cooperate with each other, after the temperature sensor detects that the temperature reaches the preset value, the heat dissipation blade 107 is controlled to open at the maximum angle, and the exhaust fan 305 is started to quickly inhale 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 the overall performance of the electric control box being affected by heat. Embodiment 2

[0039] This embodiment discloses a protection method for a crane electric control box protection mechanism, comprising the following steps: 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 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 arranged under 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, knock the top and bottom of the movable groove 112, so that the dust between the electrical components in the working chamber 102 falls quickly and falls into the dust suction chamber 301, close the first solenoid valve 110, open the second solenoid valve 309, start the exhaust fan 305, the exhaust fan 305 generates suction, and sucks the dust-containing gas inside the dust suction chamber 301 to the cylinder 304 through the bell mouth 303 and the dust suction pipe 302, the dust-containing gas rotates between the cylinder 304 and the outlet pipe 308 to form a downward external vortex, 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 the preset value, control the opening angle of the heat dissipation blade 107 to the maximum, keep the first solenoid valve 110 and the second solenoid valve 309 in the open state, start the exhaust fan 305, and promote the external air to flow quickly on the path of the working chamber 102, the dust suction chamber 301, the cylindrical part 304, the air outlet pipe 308 and the air storage chamber 103.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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) close to the cylindrical portion (304).

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: A plurality of electromagnetic plates (203) are provided on the bottom plate (201); the electromagnetic plates (203) and the permanent magnet plate (111) have opposite end surfaces with 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); and the other end of the second damping spring (206) is fixedly connected to the bottom of the permanent magnet plate (111).

6. The protection mechanism for the crane electric control box according to claim 1 is characterized in that: 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).

7. 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).

8. A protection method for a protection mechanism of a crane electric control box according to any one of claims 1 to 7, 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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