Slag box jacking and locking device

Abstract

The invention discloses a slag box jacking and locking device, and relates to a coal mill technology in the field of thermal power generation. Through the structural design that a connecting rod mechanism in the jacking assembly is matched with a jacking base, automatic jacking, automatic locking, automatic unlocking and automatic descending of the slag box can be achieved only through the driving effect of the driving assembly, the whole operation process is stable, standard and reliable, the slag box is sealed tightly, and the problem that the slag box is unlocked and locked by multiple manual steps, so that the operation efficiency is high is solved. The working efficiency is low, the sealing failure of the slag box is easily caused by non-standard manual operation, and the service life of the slag box locking device is shortened. In addition, the slag box jacking and locking device is installed on the coal mill rack through the base, lifting of the supporting arm assembly can be always based on a rack panel, the phenomenon that a slag discharging system is not sealed tightly and the phenomenon that flying dust flies in the slag discharging process due to the fact that the ground is uneven and hydraulic jacking is inclined are fundamentally eradicated, and the device has the advantages of protecting the working environment and improving the working efficiency. The service life of equipment is prolonged, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to coal mill technology in the field of thermal power generation, and in particular to a slag box lifting and locking device. Background Art

[0002] The gravel coal separated from the coal pulverizing process of the coal mill is often discharged through a sealed slag discharge device. The inventor knows of a top-type fully sealed slag discharge device used in a coal mill. When the gravel coal slag box (hereinafter referred to as the "slag box") is full, the slag box locking device is manually unlocked by turning it counterclockwise. When the empty slag box returns, the hydraulic trolley lifts the slag box and the slag box locking device is manually turned clockwise to lock it. It can be seen that the existing slag box unlocking and locking rely on manual operation and require multiple steps to be completed separately. Not only is the work efficiency low, but also the non-standard operation of manual operation can easily lead to inconsistent sealing surfaces on both sides of the slag box or manual knocking-style brute force disassembly will lead to poor sealing between the slag box and the slag discharge equipment frame. Brute force disassembly can even easily cause damage to the slag box locking device, reducing the service life of the slag box locking device.

[0003] In addition, the floors of some power plants are uneven. When the hydraulic trolley lifts the slag box, the slag box and the frame of the slag discharge equipment are in contact at an angle, that is, there is a large gap between the sealing surfaces of the two. Not only is the manual locking operation more difficult, but the locking is performed on the basis of the slag box and the frame of the slag discharge equipment being in contact at an angle, which is an abnormal operation that damages the sealing surface between the slag box and the frame. If the coal mill runs for a long time, and the hydraulic trolley is used for lifting, locking, and unlocking the slag box frequently and abnormally, the slag box seal will fail.

[0004] In order to solve the above problems, the present invention proposes a slag box lifting and locking device which can be used for the fully sealed discharge of pebble coal in a coal mill. Summary of the invention

[0005] The object of the present invention is to provide a slag box lifting and locking device which can be used for the fully sealed discharge of pebble coal in a coal mill, which can realize automatic lifting, automatic locking, automatic unlocking and automatic lowering of the slag box, and the whole operation process is smooth, standardized and reliable, so as to solve the problems in the above-mentioned prior art that the unlocking and locking of the slag box rely on manual multi-step operations, which not only has low work efficiency, but also the non-standard manual operation easily leads to the failure of the slag box seal and the reduction of the service life of the slag box locking device, as well as the frequent abnormal operations of the slag box lifting, locking and unlocking, which easily lead to the failure of the slag box seal.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a slag box lifting and locking device, comprising:

[0008] A base, used for mounting on a coal mill frame;

[0009] A lifting assembly, comprising a lifting seat and a connecting rod mechanism, wherein the connecting rod mechanism comprises a connecting rod 1 and a connecting rod 2, wherein the first end of the connecting rod 1 is rotatably connected to the base, and the second end of the connecting rod 1 is rotatably connected to the first end of the connecting rod 2, the lifting seat is movably matched with the base and is located above the connecting rod mechanism, and the second end of the connecting rod 1 is in contact with the lifting seat;

[0010] A driving assembly is arranged on the base, the driving assembly is rotatably connected to the second end of the second connecting rod, and is used to drive the second end of the second connecting rod to move, so that the first connecting rod swings and switches between a first state and a second state, wherein in the first state, the second end of the first connecting rod is in the lowest position, and the lifting seat is lowered to the lowest position, and in the second state, the first connecting rod is perpendicular to the lifting seat and self-locked, the second end of the first connecting rod is in the highest position, and the lifting seat is raised to the highest position;

[0011] The support arm assembly is arranged on the lifting seat, and the support arm assembly can be raised and lowered synchronously with the lifting seat to lift or lower the slag box.

[0012] In some embodiments, the support arm assembly is disposed at the uppermost part of the slag box lifting and locking device, and in both the first state and the second state, the support arm assembly is not higher than the upper surface of the coal mill frame.

[0013] In some embodiments, the driving component is a cylinder, a hydraulic cylinder or an electric slide; the driving component is used to drive the second end of the connecting rod to rise and fall.

[0014] In some embodiments, the slag box lifting and locking device further includes a safety component, and the safety component includes:

[0015] A guide rod is arranged on one of the driving assembly and the lifting seat, and the guide rod is parallel to the lifting direction of the driving assembly, and a positioning structure 1 is arranged on the guide rod;

[0016] A locking member is arranged on the other of the driving assembly and the lifting seat, the locking member is provided with a guide rod hole for the guide rod to movably pass through, and a positioning structure 2 adapted to the positioning structure 1 is arranged on the hole wall of the guide rod hole;

[0017] In the first state, the first positioning structure and the second positioning structure are separated from each other, and in the second state, the first positioning structure and the second positioning structure are positioned and locked.

[0018] In some embodiments, one of the positioning structure 1 and the positioning structure 2 is a curved surface positioning block, the curved surface positioning block is telescopically embedded in the rod wall of the guide rod or the hole wall of the guide rod hole, and the curved surface positioning block is connected to the guide rod or the locking member through an elastic member;

[0019] The other of the first positioning structure and the second positioning structure is an arc surface positioning groove adapted to the arc surface positioning block.

[0020] In some embodiments, a plurality of groups of the connecting rod mechanisms are disposed below the lifting seat, and the connecting rods 2 of all the connecting rod mechanisms are connected to the same driving assembly, or the connecting rods 2 of each group of the connecting rod mechanisms are respectively connected to one driving assembly.

[0021] In some embodiments, two groups of the connecting rod mechanisms are provided below the lifting seat, and the two groups of the connecting rod mechanisms are arranged symmetrically, and the connecting rods 2 of the two groups of the connecting rod mechanisms are connected to the same driving assembly.

[0022] In some embodiments, the lifting assembly also includes a pressure head, which includes a pin shaft and a sleeve rotatably installed on the outside of the pin shaft, and the pin shaft is arranged at the second end portion of the connecting rod one, and the second end portion of the connecting rod one is in rolling contact with the lifting seat through the sleeve.

[0023] In some embodiments, the lifting assembly further includes a positioning guide mechanism, and the positioning guide mechanism includes:

[0024] A horizontal guide groove is provided on the side wall of the lifting seat;

[0025] A guide protrusion is arranged at the second end portion of the connecting rod 1, and the guide protrusion is slidably embedded in the horizontal guide groove. When the connecting rod 1 swings and switches between the first state and the second state, the guide protrusion can slide along the horizontal guide groove to drive the lifting seat to rise and fall synchronously.

[0026] In some embodiments, the base includes a beam seat and a pair of vertical arms arranged symmetrically on the left and right, the beam seat is connected between the bottoms of the two vertical arms, the driving assembly is arranged on the beam seat, the connecting rod mechanism, the lifting seat and the support arm assembly are all arranged above the beam seat, and the first end of the connecting rod is rotatably connected to the beam seat, and the two ends of at least one of the lifting seat and the support arm assembly are respectively matched with the sliding guides of the two vertical arms.

[0027] In some embodiments, a slide groove is formed on the inner side of the two vertical arms; and both ends of the support arm assembly are movably embedded in the slide grooves of the two vertical arms.

[0028] In some embodiments, the support arm assembly includes:

[0029] The support arm frame is located above the jacking seat, and rollers are respectively arranged at both ends of the support arm frame, and the rollers at both ends of the support arm frame are respectively rollingly installed in the slide grooves of the two vertical arms;

[0030] The supporting arm body is arranged on one side of the supporting arm frame.

[0031] Compared with the prior art, the present invention has achieved the following technical effects:

[0032] The slag box lifting and locking device proposed in the present invention has a novel and reasonable structure. Through the structural design of the connecting rod mechanism in the lifting assembly and the lifting seat, it can realize the automatic lifting, automatic locking, automatic unlocking and automatic lowering of the slag box only by relying on the driving action of the driving assembly. The entire operation process is stable, standardized and reliable, and the slag box is tightly sealed, which can solve the problem that the unlocking and locking of the slag box in the prior art rely on manual multi-step operations, which not only has low work efficiency, but also easily leads to failure of the slag box seal and reduced service life of the slag box locking device due to non-standard manual operations. In addition, the slag box lifting and locking device is installed on the coal mill frame through the base, and the lifting and lowering of the support arm assembly can always be based on the frame panel, which fundamentally eliminates the phenomenon of loose sealing of the slag discharge system caused by the uneven ground and the deflection of the hydraulic lifting, as well as the phenomenon of dust flying during the slag discharge process, and has the advantages of protecting the working environment, extending the service life of the equipment, saving maintenance costs, and reducing the labor intensity of workers.

[0033] In some technical solutions disclosed in the present invention, the support arm assembly is arranged at the top of the slag box lifting and locking device, and in the first state and the second state, the support arm assembly is not higher than the upper surface of the frame panel in the coal mill frame, which can avoid the slag box lifting and locking device from occupying the space above the frame panel, and the slag box lifting and locking device has no possibility of any interference with the slag discharge pipe, thereby avoiding the situation where the slag discharge pipe and the slag box locking device must be arranged on the same side of the frame panel due to space limitations in the use occasion. The present invention can maximize the use of the slag box lifting and locking device, making the coal mill top-mounted fully sealed slag discharge equipment suitable for any on-site layout.

[0034] In some technical solutions disclosed in the present invention, the entire slag box lifting and locking device is installed vertically and is mostly embedded in the inner side of the coal mill frame, avoiding the problem of inclined installation of traditional lifting and locking devices and occupying too much peripheral space of the coal mill frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a first-view overall schematic diagram of a slag box lifting and locking device in one or more embodiments;

[0037] Figure 2 It is a second perspective overall schematic diagram of the slag box lifting and locking device shown in one or more embodiments;

[0038] Figure 3 A side view of a slag box lifting and locking device shown in one or more embodiments;

[0039] Figure 4 A front view of a slag box lifting and locking device shown in one or more embodiments;

[0040] Figure 5 A schematic diagram of the state of the connecting rod mechanism and the safety component in the first state shown in one or more embodiments;

[0041] Figure 6 A schematic diagram of the state of the connecting rod mechanism and the safety component in the second state shown in one or more embodiments;

[0042] Figure 7 A partial cross-sectional schematic diagram of the slag box lifting and locking device in the second state shown in one or more embodiments;

[0043] Figure 8 is an overall schematic diagram of a jacking assembly shown in one or more embodiments;

[0044] Fig. 9 It is an overall schematic diagram of a fully sealed slag discharge device for a coal mill with pebble coal in one or more embodiments;

[0045] Fig.10 A side view of a fully sealed slag discharge device for a coal mill with pebble coal shown in one or more embodiments.

[0046] In the figure, the reference numerals are:

[0047] 100, slag box lifting and locking device; 200, coal mill; 201, coal mill frame; 202, frame panel; 203, frame legs; 300, slag box;

[0048] 1. Base; 11. Crossbeam seat; 12. Vertical arm; 121. Slide; 13. Connecting rod seat; 14. Fixed plate; 15. Reinforced crossbeam;

[0049] 2. Lifting assembly; 21. Lifting seat; 22. Connecting rod mechanism; 221. Connecting rod 1; 222. Connecting rod 2; 23. Press head; 231. Pin shaft; 232. Bushing; 24. Positioning guide mechanism; 241. Horizontal guide groove; 242. Guide protrusion;

[0050] 3. Driving assembly; 31. Cylinder connecting seat;

[0051] 4. Support arm assembly; 41. Support arm frame; 42. Roller; 43. Support arm body; 44. Reinforcement cross bar;

[0052] 5. Insurance assembly; 51. Guide rod; 511. Arc surface positioning groove; 52. Locking piece; 521. Guide rod hole; 522. Arc surface positioning block; 523. Elastic piece; 524. Mounting channel; 525. Pre-tightening screw. DETAILED DESCRIPTION

[0053] 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.

[0054] The purpose of the present invention is to provide a slag box lifting and locking device which can be used for the fully sealed discharge of pebble coal in a coal mill, which can realize automatic lifting, automatic locking, automatic unlocking and automatic lowering of the slag box, and the whole operation process is smooth, standardized and reliable, so as to solve the problem that the unlocking and locking of the slag box in the prior art rely on manual multi-step operations, which not only has low work efficiency, but also the non-standard manual operation easily leads to the failure of the slag box seal and the shortened service life of the slag box locking device, as well as the frequent abnormal operations of the slag box lifting, locking and unlocking, which easily lead to the failure of the slag box seal.

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] Example 1

[0057] like Figures 1 to 8As shown, the present embodiment provides a slag box lifting and locking device 100, which includes a base 1, a lifting assembly 2, a driving assembly 3 and a supporting arm assembly 4, the base 1 is used to be installed on the coal mill frame 201; the lifting assembly 2 includes a lifting seat 21 and a connecting rod mechanism 22, the connecting rod mechanism 22 includes a connecting rod 1 221 and a connecting rod 222, the first end of the connecting rod 1 221 is rotatably connected to the base 1, the second end of the connecting rod 1 221 is rotatably connected to the first end of the connecting rod 222, the lifting seat 21 is movably matched with the base 1, and is located above the connecting rod mechanism 22, and the second end of the connecting rod 1 221 is in contact with the lifting seat 21; the driving assembly 3 is arranged on the base 1, the driving assembly 3 is rotatably connected to the second end of the connecting rod 222, and the driving assembly 3 is used to drive the second end of the connecting rod 222 to move, so as to link the connecting rod 1 221 by driving the connecting rod 222 to move. Thereby, the connecting rod 221 is swung and switched between the first state and the second state with its first end hinge point as the center, wherein, in the first state, the connecting rod 221 is horizontal or slightly inclined relative to the horizontal plane (generally, the inclination angle relative to the horizontal plane is not greater than 15°), and the second end of the connecting rod 221 is at the lowest position, and accordingly, the lifting seat 21 also drops to the lowest position with the second end of the connecting rod 221. In the second state, the connecting rod 221 is perpendicular to the lifting seat 21 (that is, perpendicular to the aforementioned horizontal plane) and self-locks, at which time the second end of the connecting rod 221 is at the highest position, and accordingly, the lifting seat 21 is lifted to the highest position by the second end of the connecting rod 221, and the driving component 3 drives the second end of the connecting rod 222 to move back and forth, so that the connecting rod 221 can be switched back and forth between the first state and the second state, thereby completing the reciprocating lifting and lowering of the lifting seat 21. The support arm assembly 4 is disposed on the lifting seat 21 , and the support arm assembly 4 can be raised and lowered synchronously with the lifting seat 21 to lift or lower the slag box 300 .

[0058] In a feasible implementation, considering that in conventional hydraulic top-mounted fully sealed slag discharge equipment, the slag box locking device is located above the short sides of the coal mill frame panel, which will occupy the upper space of the panel, so that the slag discharge pipe is fixed in the limited range of the long side of the frame panel during the design and installation, and cannot adapt to the compact discharge port space of some power plants, such as Figure 1 and Figure 2 As shown, in this embodiment, the support arm assembly 4 is arranged at the top of the slag box lifting and locking device 100, and in the first state and the second state, the support arm assembly 4 is not higher than the upper surface of the frame panel 202 in the coal mill frame 201, which can avoid the slag box lifting and locking device 100 occupying the space above the frame panel 202, and can expand the setting range of the slag discharge pipe, so that the slag discharge pipe can flexibly adapt to the compact discharge port space of some power plants.

[0059] Example 2

[0060] The present embodiment provides a slag box lifting and locking device 100, which is based on the embodiment 1, and sets the driving component 3 as a telescopic driving component. The telescopic driving component can adopt a telescopic driving component including but not limited to a linear telescopic component such as a cylinder, a hydraulic cylinder or an electric slide. Based on this, the driving component 3 is mainly used to drive the second end of the connecting rod 222 to rise and fall, so that the connecting rod 1 221 swings and switches between the first state and the second state.

[0061] Taking the driving component 3 as an example, the slag box lifting and locking device 100 is a pneumatic lifting and locking device for the slag box. The cylinder is arranged at the bottom of the base 1, the piston rod of the cylinder is vertically upward, and the end of the piston rod of the cylinder is fixedly installed with a cylinder connecting seat 31 by means including but not limited to bolt fixing, key connection, mortise and tenon joint, etc. The second end of the connecting rod 222 in the aforementioned connecting rod mechanism 22 is rotatably connected to the cylinder connecting seat 31 through a pin shaft to form a rotating pair.

[0062] Example 3

[0063] This embodiment provides a slag box lifting and locking device 100, which, on the basis of Embodiment 2, is provided with multiple groups of connecting rod mechanisms 22 below the lifting seat 21, and the multiple groups of connecting rod mechanisms 22 jointly drive the lifting seat 21 to rise and fall, so as to improve the reliability and stability of the lifting and falling process of the lifting seat 21. Among them, the connecting rods 222 of all the connecting rod mechanisms 22 are connected to the same driving assembly 3, that is, all the connecting rod mechanisms 22 share one group of driving assembly 3, or the connecting rods 222 of each group of connecting rod mechanisms 22 can also be connected to one driving assembly 3 respectively. Based on this, the slag box lifting and locking device 100 as a whole is a pneumatic multi-link lifting and locking device.

[0064] In a feasible implementation, the slag box lifting and locking device 100 is provided with a set of driving components 3, and a cylinder connection seat 31 is provided at the end of the piston rod of the driving component 3. All the connecting rod mechanisms 22 are preferably evenly distributed on the periphery of the cylinder connection seat 31, and the connecting rods 222 of all the connecting rod mechanisms 22 are rotatably connected to the cylinder connection seat 31 through a pin shaft, and a rotating pair is formed. Based on this, the piston rod of the driving component 3 is lifted and lowered, which can drive the connecting rods 222 of all the connecting rod mechanisms 22 to move synchronously, so as to realize the driving of all the connecting rod mechanisms 22. By adopting a method in which multiple groups of connecting rod mechanisms 22 share a set of driving components 3, the structure of the slag box lifting and locking device 100 can be simplified on the basis of ensuring the normal operation of each connecting rod mechanism 22, the overall integration of the device can be improved, and the production and assembly process and operation cost of the device can be reduced.

[0065] In a feasible embodiment, two sets of connecting rod mechanisms 22 are preferably provided below the lifting seat 21, and the two sets of connecting rod mechanisms 22 are arranged symmetrically with the cylinder connecting seat 31 as the center. Specifically, the two sets of connecting rod mechanisms 22 are arranged with an interval of 180° with the piston rod axis of the driving assembly 3 as the center. Figures 4 to 8 Based on this, the slag box lifting and locking device 100 is a pneumatic double-link lifting and locking device as a whole.

[0066] Example 4

[0067] like Figures 4 to 8 As shown, considering that the second end of the connecting rod 1 221 of each group of connecting rod mechanisms 22 is directly used to contact and slide with the lower surface of the lifting seat 21, although the lifting and lowering of the lifting seat 21 by the connecting rod 1 221 can be realized, there will be a situation where the sliding is not smooth or the wear is serious, which not only makes the connecting rod 1 221 and the lifting seat 21 easy to be damaged and has a short service life, but also reduces the reliability and stability of the slag box lifting and locking device 100. Based on this, this embodiment provides a slag box lifting and locking device 100, which, on the basis of Embodiments 1, 2 or 3, further provides a pressure head 23 in the lifting assembly 2. The pressure head 23 includes a pin shaft 231 and a sleeve 232 rotatably installed on the outside of the pin shaft 231. The pin shaft 231 passes through the second end portion of the connecting rod 221. The second end portion of the connecting rod 221 is in rolling contact with the lower surface of the lifting seat 21 through the sleeve 232, thereby reducing wear and improving the smoothness between the lifting assembly 2 and the lifting seat 21, thereby improving the reliability and stability of the device.

[0068] In a feasible implementation, the shaft sleeve 232 can be a standard roller part available on the market, which is rotatably connected to the end of the pin shaft 231 through a bearing. Specifically, the inner ring of the bearing is fixedly connected to the pin shaft 231 by a key, and the shaft sleeve 232 is mounted on the outside of the outer ring of the bearing and fixedly connected to the outer ring of the bearing by a key.

[0069] In a feasible implementation, in order to increase the contact area between the pressure head 23 and the lower surface of the lifting seat 21, and thus improve the support stability of the pressure head 23 on the lifting seat 21, a plurality of the aforementioned shaft sleeves 232 can be simultaneously provided on the pin shaft 231 of the same pressure head 23. Taking the case where two aforementioned shaft sleeves 232 are simultaneously provided on the pin shaft 231 of the same pressure head 23 as an example, the pin shaft 231 passes through the second end of the connecting rod 1 221, and a shaft sleeve 232 is respectively provided at both ends of the pin shaft 231, and the rotation axes of the two shaft sleeves 232 are both coaxial with the pin shaft 231.

[0070] In a feasible implementation, in order to simplify the structure of the connecting rod mechanism 22 and improve its performance, the revolving pair between the connecting rod 1 221 and the connecting rod 2 222 is preferably realized by the pin 231 of the above-mentioned pressure head 23. Specifically, the pin 231 simultaneously penetrates the second end of the connecting rod 1 221 and the first end of the connecting rod 222, and the second end of the connecting rod 1 221 and the first end of the connecting rod 222 are both rotatably connected with the pin 231 to form a revolving pair. At the same time, the two ends of the pin 231 are respectively rotatably installed with the above-mentioned shaft sleeve 232. This structure also makes the assembly of the connecting rod mechanism 22 and the pressure head 23 more compact.

[0071] It should be noted that when multiple sets of connecting rod mechanisms 22 are simultaneously arranged in the slag box lifting and locking device 100, the mounting method of the pressure head 23 on each set of connecting rod mechanisms 22 is the same, and the size specifications of each pressure head 23 are also the same.

[0072] Example 5

[0073] This embodiment provides a slag box lifting and locking device 100. On the basis of the embodiment 4, a positioning guide mechanism 24 is further provided in the lifting assembly 2, which can improve the linkage between the connecting rod mechanism 22 and the lifting seat 21, thereby improving the stability of the lifting seat 21 during the lifting process, and at the same time prevent the lifting seat 21 from being offset relative to the pressure head 23 during the lifting process, thereby affecting the performance of the slag box lifting and locking device 100. Specifically, as Figure 7 and Figure 8 As shown, the positioning guide mechanism 24 includes a horizontal guide groove 241 and a guide protrusion 242. The horizontal guide groove 241 is opened on the side wall of the lifting seat 21, and the guide protrusion 242 is arranged at the second end portion of the connecting rod 221, and the guide protrusion 242 is slidably embedded in the horizontal guide groove 241. When the connecting rod 221 switches back and forth between the first state and the second state, the guide protrusion 242 can slide along the horizontal guide groove 241 to drive the lifting seat 21 to rise and fall synchronously.

[0074] In a feasible embodiment, the front and rear sides of the lifting seat 21 are preferably provided with side walls, and the front and rear side walls are both provided with horizontal guide grooves 241, and a guide protrusion 242 is respectively provided on both sides of the second end of each connecting rod 221 to slideably cooperate with the horizontal guide grooves 241 of the front and rear side walls of the lifting seat 21 respectively.

[0075] In a feasible implementation, the aforementioned positioning guide mechanism 24 is provided between each set of connecting rod mechanisms 22 and the lifting seat 21. For a single set of connecting rod mechanisms 22, the corresponding horizontal guide grooves 241 on the front and rear sides are arranged symmetrically, and the strokes of the horizontal guide grooves 241 on the front and rear sides are consistent. Generally, when the connecting rod 221 is in the first state, the guide protrusion 242 just slides to one end of the horizontal guide groove 241, and when the connecting rod 221 is in the second state, the guide protrusion 242 just slides to the other end of the horizontal guide groove 241. By using the limiting effect of the two ends of the horizontal guide groove 241 on the guide protrusion 242, the supporting stability of the connecting rod mechanism 22 on the lifting seat 21 in the first state and the second state can be improved. In particular, in the second state, the connecting rod 221 is vertically self-locked, and the limiting effect of the horizontal guide groove 241 on the guide protrusion 242 is conducive to maintaining the vertical self-locking state of the connecting rod 221, thereby improving the sealing durability and sealing stability of the device to the slag box 300.

[0076] In a feasible implementation, the guide protrusion 242 is preferably a cylindrical guide protrusion, which has the characteristic of smooth sliding. In actual operation, the guide protrusion 242 can be a protrusion structure specially set on both sides of the end of the connecting rod 221. The protrusion structure can be integrally formed with the connecting rod 221, or assembled to the connecting rod 221 by welding, bolt connection, etc., and the specific setting position can be slightly lower than the pin 231. In addition, the guide protrusion 242 can also be formed by the end of the pin 231, that is, the two ends of the pin 231 extend out of the two sleeves 232 respectively, so that the two ends of the two sleeves 232 in the pressure head 23 form a pin convex part respectively, and the pin convex part can also serve as the guide protrusion 242 to slide with the horizontal guide groove 241. In order to improve the compactness of the structure of the device, it is preferred to adopt a structural form in which the two ends of the pin 231 are used as the guide protrusion 242.

[0077] In a feasible implementation manner, in order to reduce or avoid the wear of the horizontal guide groove 241 on both ends of the pin shaft 231 , additional sleeves may be respectively mounted on the protruding portions of the pin shaft at both ends of the pin shaft 231 to protect the pin shaft 231 .

[0078] Taking the structure in Example 3 in which two groups of connecting rod mechanisms 22 are arranged under the lifting seat 21 as an example, four horizontal guide grooves 241 are opened on the front and rear side walls of the lifting seat 21, wherein each two horizontal guide grooves 241 opposite to each other form a group, so as to be slidably installed with the guide protrusions 242 on the front and rear sides of the corresponding group of connecting rod mechanisms 22.

[0079] Example 6

[0080] In order to further improve the lifting and tightening effect of the slag box lifting and locking device 100 on the slag box 300, as shown in FIG. Figures 4 to 8As shown, this embodiment provides a slag box lifting and locking device 100, which is further provided with a safety assembly 5 on the basis of Embodiments 2, 3, 4 or 5. The safety assembly 5 comprises a guide rod 51 and a locking member 52, wherein the guide rod 51 is arranged on one of the cylinder connection seat 31 and the lifting seat 21, and the guide rod 51 is parallel to the lifting direction of the piston rod in the driving assembly 3, and a positioning structure 1 is arranged on the guide rod 51; the locking member 52 is arranged on the other of the cylinder connection seat 31 and the lifting seat 21, and a guide rod hole 521 for the guide rod 51 to movably penetrate is arranged on the locking member 52, and a positioning structure 2 adapted to the aforementioned positioning structure 1 is arranged on the hole wall of the guide rod hole 521. When the connecting rod 221 is in the first state, the aforementioned positioning structure 1 and positioning structure 2 are separated from each other. When the connecting rod 221 is in the second state, the aforementioned positioning structure 1 and positioning structure 2 are positioned and locked. When it is necessary to switch the connecting rod 221 back to the first state, the positioning structure 1 and positioning structure 2 can be unlocked manually or automatically to ensure the normal telescopic operation of the piston rod in the drive assembly 3.

[0081] In a feasible implementation, one of the positioning structure 1 and the positioning structure 2 is a positioning block, which can be telescopically embedded in the rod wall of the guide rod 51 or the hole wall of the guide rod hole 521, and the positioning block is connected to the guide rod 51 or the locking member 52 through a connecting member; the other of the positioning structure 1 and the positioning structure 2 is a positioning groove adapted to the positioning block. The positioning block can be a spherical block, a cylindrical block or a prismatic block, and the shape and contour of the positioning groove are adapted to the positioning block. If the aforementioned connecting member adopts a connecting rod or a threaded rod, since the connecting rod or the threaded rod is fastened to the locking member 52 through a mechanical structure, it is necessary to manually loosen or tighten the connecting rod or the threaded rod, and then adjust the relative position relationship between the positioning block and the positioning groove to meet the form state of the connecting rod 1 221. In this design, the safety component 5 needs manual assistance to achieve locking and unlocking. If the aforementioned connecting member adopts an elastic member such as a spring, the elasticity of the elastic member and the relative action relationship between the positioning groove and the positioning block can be directly utilized to realize automatic adjustment of the relative position relationship between the positioning block and the positioning groove. In this design, the safety component 5 can realize automatic locking and automatic unlocking, so that the entire operation process of the slag box lifting and locking device 100 does not require human intervention, and the automatic operation of the slag box lifting and locking device 100 can be ensured on the basis of the self-locking performance of the lifting connecting rod 221.

[0082] In a feasible implementation, the positioning block is preferably connected to the guide rod 51 or the locking member 52 by an elastic member to realize automatic locking and automatic unlocking of the safety assembly 5. At the same time, considering that the columnar or prismatic positioning block and the corresponding positioning groove cannot be automatically separated, the positioning block is preferably an arc surface positioning block, and the positioning groove is set as an arc surface positioning groove. By using the arc surface of the positioning block and the positioning groove, the sliding locking and sliding separation unlocking of the positioning block and the positioning groove can be realized.

[0083] In a feasible implementation manner, the guide rod 51 is preferably fixed to the cylinder connection seat 31 by, but not limited to, threaded connection, interference fit, welding, etc., and the guide rod 51 is preferably coaxial with the piston rod of the drive assembly 3. Correspondingly, the locking member 52 is disposed above the lifting seat 21, and at the same time, the lifting seat 21 has a guide rod hole 2 for the guide rod 51 to movably penetrate, and the guide rod hole 2 is coaxially installed with the guide rod hole 521.

[0084] In a feasible implementation manner, the locking member 52 is a locking block structure, which is fixed to the lifting seat 21 by means of, but not limited to, bolt connection, welding, etc.

[0085] In a feasible implementation, the second positioning structure is an arc surface positioning block 522, and a mounting channel 524 that penetrates the guide rod hole 521 is provided on the locking member 52. The arc surface positioning block 522 can be telescopically embedded in the mounting channel 524. The arc surface positioning block 522 is connected or abutted against the end of the mounting channel 524 through the elastic member 523, and when no guide rod 51 passes through the guide rod hole 521, the arc convex surface of the arc surface positioning block 522 can be pushed out into the guide rod hole 521 by the elastic member 523. The arc surface positioning block 522 can be specifically selected as a hemispherical positioning block or a spherical positioning block. Correspondingly, the first positioning structure is an arc surface positioning groove 511 adapted to the aforementioned arc surface positioning block 522, and the arc surface positioning groove 511 is provided on the outer wall of the guide rod 51. When the connecting rod 221 is in the first state, the guide rod 51 can be located below the guide rod hole 521, or can pass through the guide rod hole 521 (that is, the guide rod 51 always passes through the guide rod hole 521). As the connecting rod 221 switches to the second state, the guide rod 51 passes through the guide rod hole 521 and moves in the guide rod hole 521. In this process, due to the squeezing effect of the rod wall of the guide rod 51 on the arc surface positioning block 522, the arc surface positioning block 522 retracts into the installation channel 524, and the elastic member 523 is compressed at this time; and when the connecting rod 221 switches to the second state, the guide rod 51 passes through the guide rod hole 521 and moves in the guide rod hole 521. After reaching the second state, the arc surface positioning groove 511 just moves to the installation channel 524 in the guide rod hole 521. At this time, since the arc surface positioning groove 511 is concave relative to the rod wall of the guide rod 51, the squeezing effect on the arc surface positioning block 522 disappears, and the arc surface positioning block 522 can be pushed out of the guide rod hole 521 under the elastic release of the elastic member 523, and embedded in the arc surface positioning groove 511, and the insurance component 5 completes the automatic locking, realizing the double self-locking of the slag box lifting locking device 100, and the piston rod no longer telescopes. On the contrary, when the slag box 300 needs to be lowered, the guide rod 51 moves downward under the pulling action of the piston rod, and the arc surface positioning groove 511 moves downward and smoothly separates from the arc surface positioning block 522 in an arc surface sliding manner, and then the arc surface positioning block 522 is squeezed by the rod wall of the guide rod 51 again, retracted into the installation channel 524, and waits for the next time to lift the slag box 300, and is released again. In this way, the safety component 5 can be switched back and forth between the automatic unlocking state and the automatic locking state.

[0086] In a feasible implementation manner, in order to enhance the safety effect of the safety assembly 5, it is preferred that a plurality of the aforementioned arc surface positioning blocks 522 are simultaneously arranged on the periphery of the guide rod hole 521, and correspondingly, the arc surface positioning grooves 511 are arranged one-to-one with the arc surface positioning blocks 522, or, a full circle of connected arc surface positioning grooves 511 are arranged on the guide rod 51, and the full circle of connected arc surface positioning grooves 511 can be adapted and locked with a plurality of arc surface positioning blocks 522 at the same time.

[0087] In a feasible implementation manner, preferably, the outer circumference of the guide rod hole 521 is symmetrically provided with two aforementioned arc surface positioning blocks 522 to ensure the locking effect.

[0088] In a feasible implementation, the mounting holes 524 and the arc surface positioning blocks 522 are arranged in a one-to-one correspondence, the first end of each mounting hole 524 is connected to the guide rod hole 521, and the second end of each mounting hole 524 is sealed to provide support for the end of the elastic member 523 in the mounting hole 524. Specifically, the second end of each mounting hole 524 can be sealed in the form of a blind hole. In addition, the second end of each mounting hole 524 can be set through, and an internal threaded hole can be set at the second end of each mounting hole 524, so that the second end of the mounting hole 524 can be sealed by setting a pre-tightening screw 525 in the internal threaded hole. Since the pre-tightening screw 525 is threadedly connected to the internal threaded hole, the elastic force of the elastic member 523 can be adjusted by screwing in or out the pre-tightening screw 525, and then the tightening force of the arc surface positioning block 522 on the arc surface positioning groove can be adjusted. The arrangement of the pre-tightening screw 525 is not only convenient for adjusting the tightening force, but also convenient for disassembly, assembly and maintenance of the elastic member 523 and the arc-surface positioning block 522 in the installation channel 524 .

[0089] Example 7

[0090] like Figures 1 to 8 As shown, this embodiment provides a slag box lifting and locking device 100, which, on the basis of Embodiment 1, 2, 3, 4, 5 or 6, adopts the following structure in the base 1: the base 1 includes a beam seat 11 and a pair of vertical arms 12 arranged symmetrically on the left and right, the beam seat 11 is connected between the bottoms of the two vertical arms 12, the driving assembly 3 is arranged below the beam seat 11, the connecting rod mechanism 22, the lifting seat 21 and the support arm assembly 4 are all arranged above the beam seat 11, and the first end of the connecting rod 221 is rotatably connected to the beam seat 11. In order to improve the lifting stability and reliability of the support arm assembly 4, it is preferred that the two ends of at least one of the lifting seat 21 and the support arm assembly 4 are respectively matched with the sliding guides of the two vertical arms 12.

[0091] In a feasible implementation manner, a connecting rod seat 13 is installed on the cross beam seat 11 by welding or bolt connection, and the first end of the connecting rod 221 is rotatably connected to the connecting rod seat 13 through a pin to form a rotating pair.

[0092] In a feasible implementation manner, preferably only the support arm assembly 4 and the two vertical arms 12 are slidably guided and matched, and the support arm assembly 4 and the vertical arms 12 are preferably nested inside and outside to achieve sliding fit. Specifically, as Figure 1 and Figure 7 As shown, the inner sides of the two vertical arms 12 are provided with a slide groove 121; the two ends of the support arm assembly 4 are respectively movably embedded in the slide grooves 121 of the two vertical arms 12. Based on the sliding cooperation relationship between the support arm assembly 4 and the two vertical arms 12, the support arm frame 41 can be directly placed on the jacking seat 21, but the two are not connected; in addition, in order to improve the structural stability, the bottom of the support arm frame 41 can also be connected to the jacking seat 21 by bolt connection or other methods.

[0093] In a feasible implementation, Figure 1 and Figure 4 As shown, the arm assembly 4 includes an arm frame 41 and an arm body 43, wherein the arm frame 41 is located above the jacking seat 21, and rollers 42 are respectively provided at both ends of the arm frame 41, and the rollers 42 at both ends of the arm frame 41 are respectively installed in the slide grooves 121 of the two vertical arms 12 in a rolling manner; the outer wall of the roller 42 and the front and rear groove walls of the slide groove 121 are in rolling contact and cooperation, which can not only support the arm frame 41 to maintain an upright state, but also improve the sliding smoothness between the arm frame 41 and the slide groove 121. The arm body 43 is arranged on one side of the arm frame 41, and when the entire slag box jacking locking device 100 is installed and used, the arm body 43 faces the slag box 300.

[0094] In a feasible implementation, Figure 2 As shown, the support arm body 43 is a vertical plate structure, and a plurality of support arm bodies 43 can be arranged at intervals on the support arm frame 41 at the same time. The plurality of support arm bodies 43 can provide multi-point support for the slag box 300, thereby improving the support stability of the support arm assembly 4 on the slag box 300 during the lifting or lowering process of the slag box 300. In order to further enhance the structural stability of the support arm assembly 4, all the support arm bodies 43 on the support arm frame 41 can be connected and assembled into one body through a reinforcing cross bar 44 to prevent a single support arm body 43 from bending and deforming during use.

[0095] In a feasible implementation, a baffle is provided on the top of the slide groove 121 to limit the uppermost position of the support arm assembly 4, to prevent the support arm assembly 4 from excessively moving along the slide groove 121 during the lifting process, and to protect the support arm assembly 4 from slipping.

[0096] In a feasible implementation manner, in order to facilitate the installation of the base 1 , a fixing plate 14 is provided on the outer side of the bottom of the two vertical arms 12 , and the fixing plate 14 is installed in cooperation with the frame legs 203 of the coal mill frame 201 .

[0097] In a feasible implementation manner, in order to improve the overall structural stability of the base 1 , a reinforcing cross beam 15 is preferably connected to the middle and top between the two vertical arms 12 .

[0098] The following takes the slag box lifting and locking device 100 as the pneumatic double-link lifting and locking device of Example 3, and the slag box lifting and locking device 100 is provided with the pressure head 23 of Example 4, the positioning guide mechanism 24 of Example 5 and the insurance component 5 of Example 6 as an example, and the working principle of the above slag box lifting and locking device 100 is specifically described:

[0099] like Fig. 9 and Fig.10 As shown, the slag box lifting and locking device 100 is generally installed upright on the two short sides of the coal mill frame 201, and the slag box lifting and locking device 100 is located between the two frame legs 203 on the short sides of the coal mill frame 201. After installation, the entire slag box lifting and locking device 100 is not higher than the upper surface of the frame panel 202 of the coal mill frame 201.

[0100] In the initial state, the connecting rod 221 is in the state Figure 5 In the first state shown, the support arm body 43 is at the lowest position. After the empty slag box 300 is transported to the bottom of the frame panel 202 , the support arm body 43 is located below the top edge of the slag box 300 .

[0101] The driving assembly 3, i.e., the piston rod of the cylinder moves upward, and the lifting seat 21 is lifted vertically upward under the lifting of the pressure head 23 and the driving of the guide protrusion 242, and drives the supporting arm body 43 to lift up; after the supporting arm body 43 contacts the top edge of the slag box 300, the connecting rod 221 has not reached the second state, and the lifting seat 21 continues to lift up, and drives the supporting arm body 43 to lift the slag box 300, until the connecting rod 221 reaches the second state. Figure 6 In the second state shown, the supporting arm body 4 lifts the slag box 300 to be in close contact with the lower surface of the frame panel 202. At this time, in the double-group connecting rod mechanism 22, the connecting rod 1 221 is vertically upward, and the movement direction is the same as the extension direction of the cylinder piston rod, which is at a dead angle. The connecting rod mechanism 22 is in a self-locking state, thereby realizing the self-locking of the slag box lifting locking device 100. Even if the system is powered off or the gas source is cut off, the vertically upward connecting rod 1 221 will not automatically fall due to the leakage of the cylinder, and the slag box 300 can be kept in a tight and sealed state.

[0102] When the slag box 300 is full of materials and needs to be lowered, the cylinder receives a descending signal, and the cylinder is controlled by the reversing solenoid valve to switch the direction of the air source. Then the piston rod of the cylinder moves downward and strongly pulls the connecting rod 221 to rotate downward until the connecting rod 221 switches to the position as shown in the figure. Figure 5In this process, the arm assembly 4 and the lifting seat 21 are pressed on the pressure head 23 by gravity and keep in contact with the pressure head 23, so that the arm assembly 4 and the lifting seat 21 slowly fall vertically downward under the driving of the pressure head 23 and the guide protrusion 242. After the slag box 300 falls to the ground, the arm assembly 4 and the lifting seat 21 continue to fall until the connecting rod 221 switches to the position as shown in FIG. Figure 5 The first state is shown.

[0103] When the connecting rod 221 is switched from the first state to the second state, the locking member 52 presses the arc surface positioning block 522 onto the guide rod 51 through the pre-tightening screw 525. As the cylinder lifting stroke is in place, the arc surface positioning block 522 slides into the arc surface positioning groove, so that the guide rod 51 is automatically locked. Combined with the self-locking of the connecting rod 221 in the connecting rod mechanism 22, the double self-locking of the slag box lifting locking device 100 is realized, which can effectively prevent the device from falling due to its own weight after power and gas are cut off.

[0104] It can be seen that the slag box lifting and locking device 100 proposed in this scheme, through the structural setting of the connecting rod mechanism 22 in the lifting assembly 2 and the lifting seat 21, only relies on the linear telescopic driving action of the driving assembly 3, that is, it realizes the automatic lifting, automatic locking, automatic unlocking and automatic descent of the slag box 300. The entire operation process is stable, standardized and reliable, and the slag box is tightly sealed, which can solve the problems that the slag box unlocking and locking in the prior art rely on manual multi-step operations, which not only has low work efficiency, but also the non-standard manual operation easily leads to the failure of the slag box sealing and the reduction of the service life of the slag box locking device. In addition, the slag box lifting and locking device 100 is suspended and installed on the coal mill frame 201 through the base 1, and the lifting and lowering of the support arm assembly 4 can always be based on the frame panel 202, which fundamentally eliminates the phenomenon of loose sealing of the slag discharge system caused by the uneven ground and the hydraulic lifting deflection and the phenomenon of dust flying during the slag discharge process, and has the advantages of protecting the working environment, extending the service life of the equipment, saving maintenance costs, and reducing the labor intensity of workers.

[0105] The slag box lifting and locking device 100 is based on a pneumatic lifting design and has the characteristics of automatic locking, tight sealing, long equipment service life, high working efficiency, etc. It fundamentally changes the current situation that the traditional lifting and locking is completed in multiple steps and completely relies on manual standardized operation. It also breaks through the installation position and structural limitations of the traditional lifting and locking device, solves the sealing leakage caused by the irregular sealing of the slag box and the flying of coal ash and dust caused by the slag discharge process, and solves the influence of the installation position of the lifting and locking device on the overall slag discharge equipment layout. The specific beneficial effects are as follows:

[0106] (i) In the traditional coal mill slag discharge system, the slag box is lifted by a hydraulic trolley placed on the ground below the slag box, thereby achieving complete sealing between the slag box and the frame panel. Some power plants have uneven floors. After the hydraulic trolley lifts the slag box, the slag box and the frame panel will be in contact at an angle, making it difficult to achieve manual locking. In this solution, the base is used to be installed on the coal mill frame, and the support arm assembly can always drive the slag box to move up and down based on the frame panel, avoiding the sealing angle formed by the hydraulic trolley relying on the ground as the reference plane to move up and down. It fundamentally eliminates the phenomenon of loose sealing of the slag discharge system caused by the deflection of the hydraulic jacking due to uneven ground and the phenomenon of dust flying during the slag discharge process, which has the advantages of protecting the working environment, extending the service life of equipment, saving maintenance costs, and reducing the labor intensity of workers.

[0107] (ii) Manual locking is time-consuming and laborious, and the locking effect is changed due to human uncertainties. This solution realizes the automatic lifting, locking, unlocking and lowering of the slag box by means of the connecting rod mechanism in the jacking assembly in conjunction with the structural setting of the jacking seat, relying only on the linear telescopic driving action of the driving assembly. The entire operation process is smooth, standardized and reliable, and the slag box is tightly sealed. It can not only solve the problems in the prior art that the unlocking and locking of the slag box rely on manual multi-step operations, which not only has low work efficiency, but also the slag box seal is prone to failure, but also eliminates the disadvantages caused by reliance on human subjective factors.

[0108] (III) In conventional hydraulic top-mounted fully sealed slag discharge equipment, the slag box locking device is located above the short sides of the coal mill frame panel, which will occupy the upper space of the panel, so that the slag discharge pipe is fixed within the limited range of the long side of the frame panel in the design and installation position, and cannot adapt to the compact discharge port space of some power plants. In this scheme, the support arm assembly is set at the top of the slag box lifting and locking device, and in the first state and the second state, the support arm assembly is not higher than the upper surface of the frame panel in the coal mill frame, which can avoid the slag box lifting and locking device from occupying the space above the frame panel. There is no possibility of any interference between the slag box lifting and locking device and the slag discharge pipe, thereby avoiding the situation where the slag discharge pipe and the slag box locking device must be arranged on the same side of the frame panel due to space limitations in the use occasion. This scheme maximizes its use scenarios, making the coal mill top-mounted fully sealed slag discharge equipment suitable for layout at any site.

[0109] (iv) The entire slag box lifting and locking device is installed vertically and is mostly embedded in the inner side of the coal mill frame, avoiding the problem of the traditional lifting and locking device being installed at an angle and occupying too much space around the coal mill frame.

[0110] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A slag box lifting and locking device, characterized in that: include: A base (1) for being mounted on a coal mill frame (201); A lifting assembly (2), comprising a lifting seat (21) and a connecting rod mechanism (22), wherein the connecting rod mechanism (22) comprises a connecting rod 1 (221) and a connecting rod 2 (222), wherein the first end of the connecting rod 1 (221) is rotatably connected to the base (1), and the second end of the connecting rod 1 (221) is rotatably connected to the first end of the connecting rod 2 (222), the lifting seat (21) is movably matched with the base (1) and is located above the connecting rod mechanism (22), and the second end of the connecting rod 1 (221) is in contact with the lifting seat (21); A driving assembly (3) is arranged on the base (1), and the driving assembly (3) is rotatably connected to the second end of the second connecting rod (222) and is used to drive the second end of the second connecting rod (222) to move so that the first connecting rod (221) swings and switches between a first state and a second state, wherein in the first state, the second end of the first connecting rod (221) is in the lowest position, and the lifting seat (21) is lowered to the lowest position; in the second state, the first connecting rod (221) is perpendicular to the lifting seat (21) and self-locked, and the second end of the first connecting rod (221) is in the highest position, and the lifting seat (21) is raised to the highest position; The support arm assembly (4) is arranged on the lifting seat (21), and the support arm assembly (4) can be raised and lowered synchronously with the lifting seat (21) to lift or lower the slag box (300).

2. The slag box lifting and locking device according to claim 1, characterized in that: The support arm assembly (4) is arranged at the top of the slag box lifting and locking device, and in the first state and the second state, the support arm assembly (4) is not higher than the upper surface of the coal mill frame (201).

3. The slag box lifting and locking device according to claim 1 or 2, characterized in that: The driving component (3) is a cylinder, a hydraulic cylinder or an electric slide; the driving component (3) is used to drive the second end of the second connecting rod (222) to rise and fall.

4. The slag box lifting and locking device according to claim 3, characterized in that: It also includes a safety component (5), which includes: A guide rod (51) is arranged on one of the driving assembly (3) and the lifting seat (21), and the guide rod (51) is parallel to the lifting direction of the driving assembly (3), and a positioning structure 1 is arranged on the guide rod (51); A locking member (52) is arranged on the other of the driving assembly (3) and the lifting seat (21), the locking member (52) is provided with a guide rod hole (521) for the guide rod (51) to movably pass through, and a second positioning structure adapted to the first positioning structure is arranged on the hole wall of the guide rod hole (521); In the first state, the first positioning structure and the second positioning structure are separated from each other, and in the second state, the first positioning structure and the second positioning structure are positioned and locked.

5. The slag box lifting and locking device according to claim 4, characterized in that: One of the first positioning structure and the second positioning structure is a curved surface positioning block (522), and the curved surface positioning block (522) is telescopically embedded in the rod wall of the guide rod (51) or the hole wall of the guide rod hole (521), and the curved surface positioning block (522) is connected to the guide rod (51) or the locking member (52) through an elastic member (523); The other of the first positioning structure and the second positioning structure is a curved surface positioning groove (511) adapted to the curved surface positioning block (522).

6. The slag box lifting and locking device according to claim 1 or 2, characterized in that: A plurality of groups of connecting rod mechanisms (22) are arranged below the lifting seat (21), and the connecting rods (222) of all the connecting rod mechanisms (22) are connected to the same driving assembly (3), or the connecting rods (222) of each group of the connecting rod mechanisms (22) are respectively connected to one driving assembly (3).

7. The slag box lifting and locking device according to claim 6, characterized in that: Two groups of connecting rod mechanisms (22) are arranged below the lifting seat (21), and the two groups of connecting rod mechanisms (22) are symmetrically arranged. The connecting rods 2 (222) of the two groups of connecting rod mechanisms (22) are connected to the same driving assembly (3).

8. The slag box lifting and locking device according to claim 1 or 2, characterized in that: The lifting assembly (2) also includes a pressure head (23), and the pressure head (23) includes a pin shaft (231) and a sleeve (232) rotatably mounted on the outside of the pin shaft (231), and the pin shaft (231) is arranged at the second end portion of the connecting rod (221), and the second end portion of the connecting rod (221) is in rolling contact with the lifting seat (21) through the sleeve (232).

9. The slag box lifting and locking device according to claim 8, characterized in that: The lifting assembly (2) further comprises a positioning guide mechanism (24), wherein the positioning guide mechanism (24) comprises: A horizontal guide groove (241) is arranged on the side wall of the lifting seat (21); A guide protrusion (242) is arranged at the second end portion of the connecting rod (221), and the guide protrusion (242) is slidably embedded in the horizontal guide groove (241). When the connecting rod (221) swings and switches between the first state and the second state, the guide protrusion (242) can slide along the horizontal guide groove (241) to drive the lifting seat (21) to rise and fall synchronously.

10. The slag box lifting and locking device according to claim 1 or 2, characterized in that: The base (1) comprises a beam seat (11) and a pair of vertical arms (12) arranged symmetrically on the left and right, the beam seat (11) is connected between the bottoms of the two vertical arms (12), the driving assembly (3) is arranged on the beam seat (11), the connecting rod mechanism (22), the lifting seat (21) and the supporting arm assembly (4) are all arranged above the beam seat (11), and the first end of the connecting rod (221) is rotatably connected to the beam seat (11), and the two ends of at least one of the lifting seat (21) and the supporting arm assembly (4) are respectively matched with the sliding guides of the two vertical arms (12).

11. The slag box lifting and locking device according to claim 10, characterized in that: The inner sides of the two vertical arms (12) are provided with sliding grooves (121); the two ends of the support arm assembly (4) are respectively movably embedded in the sliding grooves (121) of the two vertical arms (12).

12. The slag box lifting and locking device according to claim 11, characterized in that: The support arm assembly (4) comprises: An arm support frame (41) is located above the lifting seat (21), and rollers (42) are respectively provided at both ends of the arm support frame (41), and the rollers (42) at both ends of the arm support frame (41) are respectively rollingly installed in the slide grooves (121) of the two vertical arms (12); The supporting arm body (43) is arranged on one side of the supporting arm frame (41).

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