A conveniently maintained hydraulic system for a refining furnace

Abstract

The application discloses a convenient-to-maintain refining furnace hydraulic system and relates to the technical field of electrode lifting systems. The convenient-to-maintain refining furnace hydraulic system comprises an oil tank and a control assembly, two oil outlet pipes and an oil inlet pipe are arranged on the oil tank, a rubber joint, a ball valve, a quantitative pump, a high-pressure hose and a first one-way valve are sequentially arranged on the oil inlet pipe, a variable frequency motor is connected to the quantitative pump, two high-pressure stop valves and three pressure gauge switches are arranged on the oil inlet pipe and located on the side, away from the oil tank, of the first one-way valve, and a capsule energy accumulator is arranged on one of the high-pressure stop valves. In the application, when working, the second hydraulic control one-way valve is powered on to open, and an electro-hydraulic servo valve controls electrode lifting; the electro-hydraulic reversing valve is powered on, system pressure is supplied, and normal action is realized; when not working, the second hydraulic control one-way valve is not powered on to stop the plunger pump, the electro-hydraulic reversing valve is in the middle position, pressure is not supplied, and maintenance in the later period is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrode lifting system, and particularly relates to a refining furnace hydraulic system convenient to maintain. BACKGROUND

[0002] The furnace body of the LF furnace (refining furnace) is a ladle furnace. It is slightly different from the common slide gate ladle, and the upper opening of the ladle has a water-cooled flange, which is sealed with a furnace cover through a sealing rubber ring to prevent the invasion of cold air; in addition to the slide gate for pouring, the bottom of the ladle is also provided with a gas permeable brick capable of blowing inert gas to achieve the effect of stirring the molten steel.

[0003] The existing hydraulic system of the refining furnace uses an electrode lifting oil cylinder for lifting, but if the electrode lifting oil cylinder needs to be maintained and repaired, a corresponding electric signal must be given to make it stay at the maintenance and repair position. During this period, if power failure occurs, the electrode lifting oil cylinder will descend by gravity, which may cause damage to the equipment, personnel injury and other situations. Therefore, the hydraulic system has great safety hazards, and therefore a refining furnace hydraulic system convenient to maintain is proposed. SUMMARY

[0004] The purpose of the present application is to provide a refining furnace hydraulic system convenient to maintain, to solve the problem that the protection box is difficult to fix and limit the control assembly, the control assembly is prone to collision and damage during transportation, and a large amount of heat is generated during the work of the control assembly, which is prone to high-temperature damage if not timely heat dissipation.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a refining furnace hydraulic system convenient to maintain, comprising an oil tank and a control assembly, two oil outlet pipes and an oil inlet pipe are installed on the oil tank, a rubber joint, a ball valve, a constant delivery pump, a high-pressure hose and a first one-way valve are sequentially arranged on the oil inlet pipe, a variable frequency motor is connected to the constant delivery pump, two high-pressure stop valves and three pressure gauge switches are arranged on the oil inlet pipe, one of the high-pressure stop valves is provided with a capsule accumulator, a pressure gauge, a pressure relay and a pressure sensor are respectively arranged on the three pressure gauge switches, the other high-pressure stop valve is provided with an electro-hydraulic servo valve, the electro-hydraulic servo valve is connected with an electrode lifting oil cylinder through a hose, a second one-way valve is arranged on the hose, an electro-hydraulic reversing valve is connected to the second one-way valve, and filters are arranged on the ends of the oil outlet pipes and the oil inlet pipe close to the oil tank.

[0006] The control assembly comprises a protection box, a control body, opposite inner walls of the protection box are jointly rotationally installed with a rotating rod, the rotating rod is rotationally installed with a box cover, the protection box and the box cover are clamped through two clamping assemblies, a rectangular cavity is formed in the protection box, a limiting and fixing assembly matched with the control body is arranged in the rectangular cavity, opposite inner walls of the protection box are all formed with mounting grooves, the mounting grooves are communicated with the rectangular cavity, four reciprocating lead screws are jointly rotationally installed on opposite inner walls of the two mounting grooves, the four reciprocating lead screws are connected through a transmission assembly, and heat dissipation assemblies are arranged on every two matched reciprocating lead screws.

[0007] Preferably, the clamping assembly comprises a rectangular pin block, a sliding groove is formed in the side of the box cover, the rectangular pin block is slidingly installed in the sliding groove, a clamping groove is formed in the side inner wall of the protection box, the clamping groove is matched with the rectangular pin block, an operation hole is formed in the side inner wall of the sliding groove, an operation plate is slidingly installed in the operation hole, and the side of the operation plate is fixedly connected with the side of the rectangular pin block.

[0008] Preferably, the first reset unit comprises a guide rod and a first reset spring, a guide hole is formed in the side of the rectangular pin block, one end of the guide rod is fixedly installed on the side inner wall of the sliding groove, the other end of the guide rod is slidingly installed in the guide hole, one end of the first reset spring is fixedly installed on the side inner wall of the sliding groove, and the other end of the first reset spring is fixedly installed on the side of the rectangular pin block.

[0009] Preferably, the limiting and fixing assembly comprises four clamping plates, a square groove is formed in the bottom inner wall of the protection box, a square sliding hole is formed in the bottom inner wall of the square groove, a hollow sliding column is slidingly installed in the square sliding hole, a square plate is fixedly installed on the top of the hollow sliding column, a compression unit is arranged on the bottom of the hollow sliding column, four sliding holes are formed in the top inner wall of the rectangular cavity, a rectangular sliding block is slidingly installed in each of the four sliding holes, the four rectangular sliding blocks are connected with the hollow sliding column through connecting units, and the four clamping plates are fixedly installed on the top of the four rectangular sliding blocks.

[0010] Preferably, the compression assembly comprises a round shaft, a compression spring, one end of the round shaft is fixedly installed on the inner wall of the bottom of the rectangular cavity, the other end of the round shaft is slidably installed in the hollow slide column, one end of the compression spring is fixedly installed on the bottom of the hollow slide column, and the other end of the compression spring is fixedly installed on the inner wall of the bottom of the rectangular cavity.

[0011] Preferably, the connecting unit comprises a connecting rod, one end of the connecting rod is rotatably installed on the side of the hollow slide column, and the other end of the connecting rod is rotatably installed on the side of the rectangular slide block.

[0012] Preferably, the side of each of the four clamping plates is fixedly installed with a protective pad.

[0013] Preferably, the transmission assembly comprises four chain wheels, the four chain wheels are fixedly sleeved on the four reciprocating wire rods, a chain is commonly meshed on the four chain wheels, a motor groove is formed in the top inner wall of one of the installation grooves, a driving motor is fixedly installed in the motor groove, the output shaft of the driving motor is connected with the end of one of the reciprocating wire rods, and the driving motor is electrically connected with the temperature sensor.

[0014] Preferably, the second reset unit comprises a limiting rod and a second reset spring, a limiting hole is formed in the bottom of the clamping plate and the bottom of the sealing lifting plate, one end of the limiting rod is fixedly installed on the bottom inner wall of the installation groove, the other end of the limiting rod is slidably installed in the limiting hole, one end of the second reset spring is fixedly installed on the bottom of the clamping plate, and the other end of the second reset spring is fixedly installed on the bottom inner wall of the installation groove.

[0015] Preferably, the bottom of the mounting block is provided with a linkage groove matched with the clamping plate.

[0016] In summary, the technical effects and advantages of the present application are as follows:

[0017] 1. In the present application, when working, the second hydraulic control check valve is powered on to open, and the electro-hydraulic servo valve controls the electrode lifting; the electro-hydraulic reversing valve is powered on, the system pressure is supplied, and normal operation is realized; when not working, the second hydraulic control check valve is not powered on to stop the plunger pump, the electro-hydraulic reversing valve is in the middle position, the pressure is not supplied, and maintenance is facilitated.

[0018] 2、The application, when the control body is working, a large amount of heat is generated, in order to play the dustproof and waterproof function, the protective box is in a closed state in the normal state, when the temperature sensor senses that the temperature in the protective box reaches the set threshold, the transmission assembly and the cooling fan are started, the two mounting blocks are driven to move up and down synchronously under the action of the transmission assembly, when the mounting block moves upward from the bottom, the sealing lifting plate is driven to move upward under the action of the second reset unit, so that the ventilation hole is aligned with the rectangular heat dissipation hole, at this time, the mounting block drives the cooling fan to move, the heat in the protective box is discharged in time, and damage to the control body caused by high heat is prevented, when the cooling work is finished, the mounting block moves downward to the bottom, in the movement process, the clamping plate and the sealing lifting plate move downward synchronously, and the sealing function of the protective box is realized.

[0019] 3、The application, the control body is placed on the top of the square plate, under the action of gravity, the square plate and the hollow slide column move downward synchronously, and the compression spring is pressed, when the hollow slide column moves downward, the four rectangular sliding blocks and the four clamping plates move synchronously to the control body under the action of the four connecting rods, and the control body is limited and fixed, so that collision damage caused by lack of limiting of the control body during carrying is prevented, the control body is effectively protected, and the whole fixing process is simple, convenient and practical.

[0020] 4、The application, when the box cover needs to be opened, the two operation plates are moved towards each other, the two rectangular pin blocks are driven to move synchronously, the clamping limiting function with the two clamping grooves is released, and then the box cover is turned over, when the box cover needs to be closed, the two operation plates are moved towards each other and the box cover is reset, the rectangular pin blocks are reset under the action of the first reset spring after the operation plates are loosened, and the fixing function of the box cover is realized, the advantage of this setting is that the convenient opening and closing function of the box cover can be realized through the rectangular pin blocks, and the opening and closing operation is simple and stable. DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 Hydraulic schematic diagram in the embodiments of the present application

[0023] Figure 2 Schematic diagram of the three-dimensional structure of the refining furnace hydraulic system convenient to maintain in the embodiments of the present application

[0024] Figure 3Structure diagram of the card assembly and the first reset unit of the application;

[0025] Figure 4 Structure diagram of the protective box of the application;

[0026] Figure 5 Structure diagram of the protective box, the sealing lifting plate and the box cover of the application.

[0027] In the figure: 100, control assembly; 101, oil tank; 102, rubber joint; 103, filter; 104, ball valve; 105, quantitative pump; 106, high-pressure hose; 107, first one-way valve; 108, high-pressure stop valve; 109, bladder energy accumulator; 110, pressure gauge switch; 111, pressure gauge; 112, pressure relay; 113, pressure sensor; 114, electro-hydraulic reversing valve; 115, variable frequency motor; 116, second one-way valve; 117, electro-hydraulic servo valve; 118, electrode lifting oil cylinder; 1, protective box; 2, control body; 3, box cover; 4, rectangular pin block; 5, guide rod; 6, first reset spring; 7, operation plate; 8, hollow slide column; 9, square plate; 10, compression spring; 11, rectangular slide block; 12, connecting rod; 13, clamping plate; 14, protective pad; 15, reciprocating screw rod; 16, chain wheel; 17, chain; 18, driving motor; 19, mounting block; 20, cooling fan; 21, temperature sensor; 22, rectangular cooling hole; 23, sealing lifting plate; 24, ventilation hole; 25, limiting rod; 26, second reset spring; 27, clamping plate; 28, linkage groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0029] Embodiment: refer to Figure 1The illustrated one kind convenient maintenance's refining furnace hydraulic system, including oil tank 101 and control assembly 100, be installed with two oil outlet pipe and oil inlet pipe on oil tank 101, oil inlet pipe is sequentially provided with rubber joint 102, ball valve 104, quantitative pump 105, high pressure hose 106 and first check valve 107, quantitative pump 105 is connected with variable frequency motor 115, oil inlet pipe is provided with two high pressure stop valve 108 and three pressure gauge switches 110 on the side of first check valve 107 away from oil tank 101, one high pressure stop valve 108 is installed with capsule energy accumulator 109, three pressure gauge switches 110 are respectively installed with pressure gauge 111, pressure relay 112 and pressure sensor 113, another high pressure stop valve 108 is installed with electro-hydraulic servo valve 117, electro-hydraulic servo valve 117 is connected with electrode lifting oil cylinder 118 through hose, and the second check valve 116 is arranged on the hose, and the second check valve 116 is connected with electro-hydraulic reversing valve 114, and the end of oil outlet pipe and oil inlet pipe close to oil tank 101 is installed with filter 103.

[0030] By the above structure: if want to maintain the electrode lifting oil cylinder 118, only need to be lifted to the corresponding maintenance position by the electrode lifting oil cylinder 118 through electric signal, then the variable frequency motor 115 is closed, the whole oil inlet system is not worked, because the hydraulic oil of second check valve 116 cannot backflow, through control assembly 100 makes electro-hydraulic reversing valve 114 not electricity, is in AP position, forms closed circuit, ensures that the electrode lifting oil cylinder 118 will not descend because of dead weight, and the energy saving and consumption reduction of the reformed play, the equipment maintenance, the guarantee pressure steady, reduce the working frequency of frequency converter.

[0031] Reference Figures 2-5As shown, the control assembly 100 comprises a protective box 1, a control body 2, the opposite inner walls of the protective box 1 are jointly rotatably installed with a rotating rod, the rotating rod is rotatably installed with a box cover 3, the protective box 1 and the box cover 3 are clamped by two clamping assemblies, a rectangular cavity is formed in the protective box 1, a limiting and fixing assembly matched with the control body 2 is arranged in the rectangular cavity, the opposite inner walls of the protective box 1 are both formed with an installation groove, the installation grooves are communicated with the rectangular cavity, the opposite inner walls of the two installation grooves are jointly rotatably installed with four reciprocating lead screws 15, the reciprocating lead screws 15 are connected by a transmission assembly, two reciprocating lead screws 15 are both provided with a heat dissipation assembly, the heat dissipation assembly comprises an installation block 19 and a plurality of rectangular heat dissipation holes 22, the installation block 19 is threadedly installed on the two reciprocating lead screws 15, two installation holes are formed in the side of the installation block 19, the installation holes are both provided with a heat dissipation fan 20, the top of the box cover 3 is provided with a temperature sensor 21, the temperature sensor 21 is electrically connected with the two heat dissipation fans 20, the rectangular heat dissipation holes 22 are evenly formed in the side inner wall of the installation groove, a sealing lifting plate 23 is slidably installed on the side inner wall of the installation groove, a plurality of ventilation holes 24 are formed in the side of the sealing lifting plate 23, a clamping plate 27 is fixedly installed on the bottom of the sealing lifting plate 23, and a second reset unit is arranged on the bottom of the clamping plate 27.

[0032] Through the above structure, in use, first, the box cover 3 is opened by the clamping assembly, then the control body 2 is placed in the protective box 1, and the control body 2 is limited and fixed by the limiting and fixing assembly, so as to prevent the control body 2 from being damaged by lack of limiting during carrying, effectively protecting the control body 2, and the whole fixing process is simple, convenient and practical. Then the box cover 3 is closed, when the control body 2 works, a large amount of heat will be generated, in order to play the dustproof and waterproof function, the protective box 1 is in a closed state in normal state, when the temperature sensor 21 senses that the temperature in the protective box 1 reaches the set threshold value, the transmission assembly and the heat dissipation fan 20 are started, the two installation blocks 19 are driven to move up and down synchronously by the transmission assembly, when the installation block 19 moves up from the bottom, the sealing lifting plate 23 is driven to move up by the second reset unit, so that the ventilation hole 24 is aligned with the rectangular heat dissipation hole 22, at this time, the installation block 19 drives the heat dissipation fan 20 to move, the heat in the protective box 1 is discharged in time, preventing the control body 2 from being damaged by high heat, when the heat dissipation work is finished, the installation block 19 moves down to the bottom and resets, in the movement process, the clamping plate 27 and the sealing lifting plate 23 move down synchronously, realizing the sealing function of the protective box 1.

[0033] As Figure 3As shown, the clamping assembly comprises a rectangular pin block 4, the side of the box cover 3 is provided with a sliding slot, the rectangular pin block 4 is slidingly installed in the sliding slot, the inner wall of the side of the protective box 1 is provided with a clamping groove, the clamping groove is matched with the rectangular pin block 4, the inner wall of the side of the sliding slot is provided with an operating hole, the operating plate 7 is slidingly installed in the operating hole, the side of the operating plate 7 is fixedly connected with the side of the rectangular pin block 4, the side of the rectangular pin block 4 is provided with a first reset unit, the advantage of such arrangement is that through the arrangement of the rectangular pin block 4, the opening and closing function of the box cover 3 can be realized through the cooperation of the rectangular pin block 4 and the clamping groove.

[0034] As shown in Figure 3 The first reset unit comprises a guide rod 5 and a first reset spring 6, the side of the rectangular pin block 4 is provided with a guide hole, one end of the guide rod 5 is fixedly installed on the inner wall of the side of the sliding slot, the other end of the guide rod 5 is slidingly installed in the guide hole, one end of the first reset spring 6 is fixedly installed on the inner wall of the side of the sliding slot, the other end of the first reset spring 6 is fixedly installed on the side of the rectangular pin block 4, the advantage of such arrangement is that through the arrangement of the first reset spring 6, when the limiting of the rectangular pin block 4 is released, the clamping function of the rectangular pin block 4 and the clamping groove can be realized through the elastic action of the first reset spring 6.

[0035] As shown in Figure 4 The limiting and fixing assembly comprises four clamping plates 13, the bottom inner wall of the protective box 1 is provided with a square slot, the bottom inner wall of the square slot is provided with a square sliding hole, the hollow slide column 8 is slidingly installed in the square sliding hole, the square plate 9 is fixedly installed on the top of the hollow slide column 8, the bottom of the hollow slide column 8 is provided with a compression unit, the top inner wall of the rectangular cavity is provided with four sliding holes, the four rectangular sliding blocks 11 are slidingly installed in the four sliding holes, the four rectangular sliding blocks 11 are connected with the hollow slide column 8 through the connecting unit, the four clamping plates 13 are fixedly installed on the top of the four rectangular sliding blocks 11, the advantage of such arrangement is that through the arrangement of the four clamping plates 13, the fixed limiting function of the control body 2 can be realized, and the control body 2 is prevented from being damaged by collision during transportation.

[0036] As shown in Figure 4 The compression assembly comprises a circular shaft and a compression spring 10, one end of the circular shaft is fixedly installed on the bottom inner wall of the rectangular cavity, the other end of the circular shaft is slidingly installed in the hollow slide column 8, one end of the compression spring 10 is fixedly installed on the bottom of the hollow slide column 8, the other end of the compression spring 10 is fixedly installed on the bottom inner wall of the rectangular cavity, the advantage of such arrangement is that through the arrangement of the compression spring 10, when the extrusion of the square plate 9 is released, the reset function can be realized under the elastic action of the compression spring 10.

[0037] As shown in Figure 4As shown, the connecting unit comprises a connecting rod 12, one end of the connecting rod 12 is rotatably installed on the side of the hollow slide post 8, the other end of the connecting rod 12 is rotatably installed on the side of the rectangular slide block 11, and the advantage of such an arrangement is that the synchronous movement of the rectangular slide block 11 driven by the hollow slide post 8 can be achieved through the arrangement of the connecting rod 12.

[0038] As shown, Figure 4 As shown, the side of each of the four clamping plates 13 is fixedly installed with a protective pad 14, and the advantage of such an arrangement is that the protective pad 14 can provide protection for the control body 2 when it is fixed and positioned, preventing damage to the control body 2.

[0039] As shown, Figure 5 As shown, the transmission assembly comprises four chain wheels 16, the four chain wheels 16 are fixedly sleeved on the four reciprocating lead screws 15, and the four chain wheels 16 are jointly meshed with a chain 17, the top inner wall of one of the mounting grooves is provided with a motor groove, a driving motor 18 is fixedly installed in the motor groove, the output shaft of the driving motor 18 is connected with the end of one of the reciprocating lead screws 15, and the driving motor 18 is electrically connected with the temperature sensor 21, and the advantage of such an arrangement is that the synchronous rotation of the four reciprocating lead screws 15 can be achieved through the arrangement of the four chain wheels 16, preventing the mounting block 19 from being stuck during the lifting process.

[0040] As shown, Figure 5 As shown, the second reset unit comprises a limiting rod 25 and a second reset spring 26, the bottom of the clamping plate 27 and the bottom of the sealing lifting plate 23 are jointly provided with a limiting hole, one end of the limiting rod 25 is fixedly installed on the bottom inner wall of the mounting groove, the other end of the limiting rod 25 slides in the limiting hole, one end of the second reset spring 26 is fixedly installed on the bottom of the clamping plate 27, and the other end of the second reset spring 26 is fixedly installed on the bottom inner wall of the mounting groove, and the advantage of such an arrangement is that when the mounting block 19 is removed from the limiting of the sealing lifting plate 23, the sealing lifting plate 26 can be driven to move upward by the elastic action of the second reset spring 26, thereby removing the sealing state of the protection box 1.

[0041] As shown, Figure 5 As shown, the bottom of the mounting block 19 is provided with a linkage groove 28 matched with the clamping plate 27, and the advantage of such an arrangement is that when the mounting block 19 moves downward, the sealing lifting plate 23 can be driven to move downward synchronously through the clamping of the linkage groove and the clamping plate 27.

[0042] The working principle of the present application is: when receiving the smelting instruction, the operator starts the variable frequency motor 115 to drive the quantitative pump 105 to work, and the hydraulic oil in the oil tank 101 enters the oil pipe through the filter 103, passes through the rubber joint 102 and the ball valve 104, is delivered to the high-pressure hose 106 through the quantitative pump 105, and is divided into the oil pipe after passing through the first one-way valve 107. Part of the pressurized hydraulic oil enters the capsule energy accumulator 109 through the high-pressure stop valve 108, and part of the pressurized hydraulic oil passes through the control assembly 100 to the pressure gauge 111, the pressure relay 112 and the pressure sensor 113 which can be externally connected to a computer, so that the numerical value can be displayed on the computer screen. In addition, the pressurized hydraulic oil enters the electro-hydraulic servo valve 117 through the high-pressure stop valve 108 and receives an analog electric signal, and outputs the corresponding modulated flow and pressure to supply the electrode lifting oil cylinder 118. After receiving different analog electric signals through the electro-hydraulic servo valve 117, the long-term work of the whole system can ensure the rising and falling of the electrode, and meet the smelting requirements of the workshop.

[0043] If the electrode lifting oil cylinder 118 needs to be maintained and repaired, the corresponding electric signal must be given to make it stay at the maintenance and repair position. At this time, only the electrode lifting oil cylinder 118 is raised to the corresponding repair position through the electric signal, and then the variable frequency motor 115 is turned off, and the whole oil inlet system is not working. Since the hydraulic oil of the second one-way valve 116 cannot flow back, the electro-hydraulic reversing valve 114 cannot be powered through the control assembly 100, and is in the AP position to form a closed circuit, so that the electrode lifting oil cylinder 118 will not fall due to its own weight. When the maintenance and repair work of the electrode lifting oil cylinder 118 is completed, the electro-hydraulic reversing valve 114 is powered through the control assembly 100 and is in the O position to form a passage, so that the hydraulic oil in the electrode lifting oil cylinder 118 will automatically flow back to the oil tank 101, so that the electrode lifting oil cylinder 118 falls and returns to the initial position. After the transformation, it plays a role in energy saving and consumption reduction, is beneficial to equipment maintenance, ensures stable pressure, and reduces the working frequency of the frequency converter.

[0044] In the use of the control assembly 100, first move the two operation plates 7 towards each other, drive the two rectangular pin blocks 4 to move synchronously, release the clamping and limiting function with the two clamping grooves, then turn over the box cover 3 and place the control body 2 on the top of the square plate 9, under the action of gravity, drive the square plate 9 and the hollow slide column 8 to move downwards synchronously, and extrude the compression spring 10, when the hollow slide column 8 moves downwards, drive the four rectangular sliding blocks 11 and the four clamping plates 13 to move towards the control body 2 synchronously under the action of the four connecting rods 12, and limit and fix the control body 2, prevent collision and damage caused by lack of limiting during carrying, effectively protect the control body 2, and the whole fixing process is simple, convenient and more practical. Then move the two operation plates 7 towards each other again and reset the box cover 3, after releasing the operation plate 7, reset the rectangular pin block 4 under the action of the first reset spring 6, realize the fixing function of the box cover 3, the advantage of this setting is that the rectangular pin block 4 can realize the convenient opening and closing function of the box cover 3, and the opening and closing operation is simple and stable.

[0045] When the control body 2 works, a large amount of heat will be generated, in order to play the dustproof and waterproof function, the protective box 1 is in a closed state under normal conditions, when the temperature sensor 21 senses that the temperature in the protective box 1 reaches the set threshold, the electric signal is transmitted to the driving motor 18 and the plurality of cooling fans 20, when the driving motor 18 works, drive the four reciprocating lead screws 15 to rotate synchronously under the joint action of the four chain wheels 16 and the chain 17, and then drive the two mounting blocks 19 to move up and down synchronously, when the mounting block 19 moves upwards from the bottom, drive the sealing lifting plate 23 to move upwards under the joint action of the limiting rod 25 and the second reset spring 26, so that the ventilation hole 24 is aligned with the rectangular cooling hole 22, at this time, the mounting block 19 drives the cooling fan 20 to move, which timely discharges the heat in the protective box 1, prevents the control body 2 from being damaged due to high heat, when the cooling work is finished, the mounting block 19 moves downwards to the bottom reset, in the movement process, drive the clamping plate 27 and the sealing lifting plate 23 to move downwards synchronously through the clamping of the linkage groove 28 and the clamping plate 27, so that the sealing lifting plate 23 seals the plurality of rectangular cooling holes 22, realizes the dustproof and waterproof function, this setting not only has good cooling effect, but also effectively avoids the phenomenon that dust in the air is attracted into the protective box 1 due to electromagnetic effect in daily work, effectively protects the control body 2.

[0046] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A conveniently maintained hydraulic system for a refining furnace, characterized in that: The utility model provides an oil tank (101) and control assembly (100) are included, two oil outlet pipes and oil inlet pipe are installed on the oil tank (101), the oil inlet pipe is sequentially provided with rubber joint (102), ball valve (104), quantitative pump (105), high pressure hose (106) and first check valve (107), the quantitative pump (105) is connected with variable frequency motor (115), the oil inlet pipe is provided with two high pressure stop valve (108) and three pressure gauge switches (110) on the side away from the oil tank (101) of first check valve (107), one high pressure stop valve (108) is installed with bladder accumulator (109), three pressure gauge switches (110) are respectively installed with pressure gauge (111), pressure relay (112) and pressure sensor (113), another high pressure stop valve (108) is installed with electro-hydraulic servo valve (117), the electro-hydraulic servo valve (117) is connected with electrode lifting cylinder (118) through hose, the hose is provided with second check valve (116), the second check valve (116) is connected with electro-hydraulic reversing valve (114), the oil outlet pipe and the oil inlet pipe are installed with filter (103) on the end close to the oil tank (101); The control assembly (100) includes a protective box (1), a control body (2), the opposite inner walls of the protective box (1) are rotatably connected with a rotating rod, the rotating rod is rotatably connected with a box cover (3), the protective box (1) and the box cover (3) are connected through two clamping assemblies, a rectangular cavity is formed in the protective box (1), a limiting and fixing assembly matched with the control body (2) is arranged in the rectangular cavity, the opposite inner walls of the protective box (1) are provided with mounting grooves, the mounting grooves are communicated with the rectangular cavity, the opposite inner walls of the two mounting grooves are rotatably connected with four reciprocating lead screws (15), the reciprocating lead screws (15) are connected through a transmission assembly, and heat dissipation assemblies are arranged on every two matched reciprocating lead screws (15). The heat dissipation assembly comprises a mounting block (19) and a plurality of rectangular heat dissipation holes (22), the mounting block (19) is threadedly connected to the two matched reciprocating lead screws (15), two mounting holes are formed in the side of the mounting block (19), and heat dissipation fans (20) are arranged in the two mounting holes. A temperature sensor (21) is arranged on the top of the box cover (3), the temperature sensor (21) is electrically connected with the two heat dissipation fans (20), the rectangular heat dissipation holes (22) are evenly formed in the side inner wall of the mounting groove, a sealing lifting plate (23) is slidably arranged on the side inner wall of the mounting groove, a plurality of ventilation holes (24) are formed in the side of the sealing lifting plate (23), a clamping plate (27) is fixedly arranged on the bottom of the sealing lifting plate (23), and a second reset unit is arranged on the bottom of the clamping plate (27). The clamping assembly comprises a rectangular pin block (4), a slide groove is formed in the side of the box cover (3), the rectangular pin block (4) is slidingly installed in the slide groove, a clamping groove is formed in the inner wall of the side of the protective box (1), the clamping groove is matched with the rectangular pin block (4), an operation hole is formed in the inner wall of the side of the slide groove, an operation plate (7) is slidingly installed in the operation hole, the side of the operation plate (7) is fixedly connected with the side of the rectangular pin block (4), and a first reset unit is arranged on the side of the rectangular pin block (4); The first reset unit comprises a guide rod (5) and a first reset spring (6), a guide hole is formed in the side of the rectangular pin block (4), one end of the guide rod (5) is fixedly installed on the inner wall of the side of the slide groove, the other end of the guide rod (5) is slidingly installed in the guide hole, one end of the first reset spring (6) is fixedly installed on the inner wall of the side of the slide groove, and the other end of the first reset spring (6) is fixedly installed on the side of the rectangular pin block (4). The limiting and fixing assembly comprises four clamping plates (13), a square groove is formed in the bottom inner wall of the protective box (1), a square sliding hole is formed in the bottom inner wall of the square groove, a hollow sliding column (8) is slidingly installed in the square sliding hole, a square plate (9) is fixedly installed on the top of the hollow sliding column (8), a compression unit is arranged on the bottom of the hollow sliding column (8), four sliding holes are formed in the top inner wall of the rectangular cavity, four rectangular sliding blocks (11) are slidingly installed in the four sliding holes, the four rectangular sliding blocks (11) are connected with the hollow sliding column (8) through connecting units, and four clamping plates (13) are fixedly installed on the top of the four rectangular sliding blocks (11).

2. A conveniently maintained hydraulic system for a refining furnace according to claim 1, characterized in that: The compression unit comprises a circular shaft and a compression spring (10), one end of the circular shaft is fixedly installed on the bottom inner wall of the rectangular cavity, the other end of the circular shaft is slidingly installed in the hollow sliding column (8), one end of the compression spring (10) is fixedly installed on the bottom of the hollow sliding column (8), and the other end of the compression spring (10) is fixedly installed on the bottom inner wall of the rectangular cavity.

3. A conveniently maintained hydraulic system for a refining furnace according to claim 1, characterized in that: The connecting unit comprises a connecting rod (12), one end of the connecting rod (12) is rotatably installed on the side of the hollow sliding column (8), and the other end of the connecting rod (12) is rotatably installed on the side of the rectangular sliding block (11).

4. A conveniently maintained hydraulic system for a refining furnace according to claim 1, characterized in that: The side of each clamping plate (13) is fixedly installed with a protection pad (14).

5. A conveniently maintained hydraulic system for a refining furnace as claimed in claim 1, characterized in that: The transmission assembly comprises four chain wheels (16), the four chain wheels (16) are fixedly sleeved on the four reciprocating wire rods (15), a chain (17) is jointly meshed on the four chain wheels (16), a motor groove is formed in the top inner wall of one of the mounting grooves, a driving motor (18) is fixedly installed in the motor groove, the output shaft of the driving motor (18) is connected with the end of one of the reciprocating wire rods (15), and the driving motor (18) is electrically connected with the temperature sensor (21).

6. A conveniently maintained hydraulic system for a refinery furnace as defined in claim 1, characterized in that: The second reset unit comprises a limiting rod (25), a second reset spring (26), the bottom of the clamping plate (27) and the bottom of the sealing lifting plate (23) are provided with a limiting hole, one end of the limiting rod (25) is fixedly installed on the inner wall of the bottom of the mounting groove, the other end of the limiting rod (25) slides in the limiting hole, one end of the second reset spring (26) is fixedly installed on the bottom of the clamping plate (27), and the other end of the second reset spring (26) is fixedly installed on the inner wall of the bottom of the mounting groove.

7. A conveniently maintained hydraulic system for a refinery furnace as claimed in claim 1, wherein: The bottom of the mounting block (19) is provided with a linkage groove (28) matched with the clamping plate (27).

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