阅读说明：本技术 一种大高炉防锈喷漆用颜料混合装置及其使用方法 (Pigment mixing device for rust-proof paint spraying of large blast furnace and use method thereof ) 是由 李亮 田通强 邱斌良 李钧 杨红军 魏纯江 曾军 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种大高炉防锈喷漆用颜料混合装置及其使用方法,包括混合罐、主管、支管、蓄水腔、混合组件、驱动组件和供风组件,混合罐内部转动连接有主管,主管外部对称固定连接有支管,且支管均与主管连通,支管内部等距开设有风孔,本发明通过供风组件配主管以及支管进使用,可以向混合罐内部持续供风,从而在混合罐颜料内部发生曝气,有利于提高颜料混合的在质量,通过蓄水腔配合电热管进行使用,可以将蓄水腔内部的水加热,从而提高混合罐内部的温度,可以避免颜料在混合罐内部固化,通过混合组件可以带动混合罐底部的颜料进行翻滚,极大程度的避免了颜料分层的现象,通过驱动组件可以带动主管以及支管进行转动,可以提高颜料混合的质量。(The invention discloses a pigment mixing device for rust-proof paint spraying of a large blast furnace and a using method thereof, and the pigment mixing device comprises a mixing tank, a main pipe, branch pipes, a water storage cavity, a mixing assembly, a driving assembly and an air supply assembly, wherein the main pipe is rotatably connected inside the mixing tank, the branch pipes are symmetrically and fixedly connected outside the main pipe and are communicated with the main pipe, and air holes are formed in the branch pipes at equal intervals. Can drive through drive assembly and be responsible for and the branch pipe rotates, can improve the quality that pigment mixes.)

1. The pigment mixing device for the rust-proof paint spraying of the large blast furnace is characterized by comprising a mixing tank (1), a main pipe (2), a branch pipe (3), a water storage cavity (8), a mixing assembly (11), a driving assembly (12) and an air supply assembly (14), wherein the mixing tank (1) is internally and rotatably connected with the main pipe (2), the branch pipe (3) is symmetrically and fixedly connected with the branch pipe (3) outside the main pipe (2), the branch pipe (3) is communicated with the main pipe (2) at the same inner equal distance, an air hole (4) is formed in the branch pipe (3) at the same inner distance, a check valve (5) is arranged in the branch pipe (3), the water storage cavity (8) is formed in the mixing tank (1), the equal distance at one side of the inner wall of the water storage cavity (8) and a fixedly connected electric heating pipe (9) are arranged outside the mixing tank (1), the mixing assembly (11) for driving the pigment to roll is arranged at the top of the mixing tank (1), and the driving assembly (12) for driving the main pipe (2) to rotate is arranged at the top of the mixing tank (1), the top of being responsible for (2) extends to mixing tank (1) outside and fixed connection has rotary joint (13), mixing tank (1) top is equipped with and is used for to being responsible for inside air feed subassembly (14) of blowing of (2).

2. The pigment mixing device for the large blast furnace antirust paint according to claim 1, characterized in that two connecting rods (6) are symmetrically and fixedly connected to the outer part of the main pipe (2), a scraper (7) is fixedly connected between the two corresponding connecting rods (6), and one side of the scraper (7) far away from the connecting rods (6) is in contact with the inner wall of the mixing tank (1).

3. The pigment mixing device for the large blast furnace antirust paint spray according to claim 1, wherein a water inlet pipe (10) is fixedly connected inside the mixing tank (1), and one end of the water inlet pipe (10) extends to the inside of the water storage cavity (8).

4. The pigment mixing device for the large blast furnace antirust paint spraying according to claim 3, wherein the mixing component (11) comprises a mounting frame (111), a motor (112), a rotating shaft (113) and a mixing frame (114), the mounting frame (111) is fixedly connected to one side of the mixing tank (1) which is outside and far away from the water inlet pipe (10), the motor (112) is fixedly connected to one side of the mounting frame (111) which is outside and far away from the mixing tank (1), the output end of the motor (112) penetrates through the mounting frame (111) and the rotating shaft (113), and one end of the rotating shaft (113) which is far away from the motor (112) extends to the mixing frame (114) which is inside and fixedly connected with the mixing frame (1).

5. The pigment mixing device for the large blast furnace antirust paint according to claim 4, wherein the driving component (12) comprises a driving bevel gear (121), shaft sleeves (122), a transmission shaft (123), a driven bevel gear (124), a driving pulley (125) and a driven pulley (126), the shaft sleeves (122) are symmetrically and fixedly connected to the outer portion of the mixing tank (1) and located above the mounting frame (111), the transmission shaft (123) is rotatably connected to the inner portions of the two shaft sleeves (122), the driven bevel gear (124) is fixedly connected to the bottom of the transmission shaft (123), the driving bevel gear (121) is sleeved on the outer portion of the rotation shaft (113), the driving bevel gear (121) is meshed with the driven bevel gear (124), the driving pulley (125) is fixedly connected to the top of the transmission shaft (123), the driven pulley (126) is sleeved on the outer portion of the main pipe (2) and located below the rotary joint (13), the driving pulley (125) is in transmission connection with the driven pulley (126) through a belt.

6. The pigment mixing apparatus for rust inhibitive paint spray of large blast furnace according to claim 1, the air supply component (14) comprises an air box (141), a filter screen (142), a fan (143), a connecting pipe (144) and an air outlet pipe (145), an air box (141) is fixedly connected with the top of the mixing tank (1) and positioned at one side of the main pipe (2), a filter screen (142) is fixedly connected inside the air box (141), a fan (143) is fixedly connected at the top of the air box (141), the input end of the fan (143) is fixedly connected with a connecting pipe (144), one end of the connecting pipe (144) far away from the fan (143) extends into the air box (141), the output end of the fan (143) is fixedly connected with an air outlet pipe (145), and one end, far away from the fan (143), of the air outlet pipe (145) is fixedly connected with the heat dissipation end of the rotary joint (13).

7. The pigment mixing device for the large blast furnace antirust paint according to claim 5, characterized in that a feed hopper (15) is fixedly connected to the top of the mixing tank (1) and on the side of the air box (141) far away from the main pipe (2), and the bottom end of the feed hopper (15) extends to the inside of the mixing tank (1).

8. The pigment mixing device for the large blast furnace antirust paint according to claim 3, characterized in that a discharge pipe (16) is fixedly connected to the outside of the mixing tank (1) and just below the water inlet pipe (10), and an electromagnetic valve (17) is fixedly connected to the outside of the discharge pipe (16).

9. The pigment mixing device for the large blast furnace antirust paint according to claim 3, characterized in that a control panel (18) is fixedly connected outside the mixing tank (1) and below the water inlet pipe (10), and the electric heating pipe (9), the motor (112), the fan (143) and the electromagnetic valve (17) are all electrically connected with the control panel (18).

10. A method for using a pigment mixing device for a large blast furnace rust-preventive paint spray, which is set forth in any one of claims 1 to 9, and which comprises the steps of:

s1, when the device is used, a worker starts the device through a control panel (18), then pours the pigment into the mixing tank (1) through a feed hopper (15), injects water into the water storage cavity (8) through a water inlet pipe (10), heats the water in the water storage cavity (8) through an electric heating pipe (9), then starts a motor (112), the motor (112) drives a rotating shaft (113) to rotate, the rotating shaft (113) drives a mixing rack (114) at the bottom of the mixing tank (1) to rotate, and therefore the pigment at the bottom of the mixing tank (1) is stirred;

s2, the rotating shaft (113) drives the driving bevel gear (121) to rotate in the rotating process, at the moment, the driving bevel gear (121) drives the driven bevel gear (124) to rotate, meanwhile, the driven bevel gear (124) drives the transmission shaft (123) to rotate inside the shaft sleeve (122), the driving belt pulley (125) rotates under the driving of the transmission shaft (123), at the moment, the driving belt pulley (125) is matched with a belt to drive the driven belt pulley (126) to rotate, at the moment, the driven belt pulley (126) drives the main pipe (2) and the branch pipe (3) to rotate inside the mixing tank (1), and therefore the pigment inside the mixing tank (1) is mixed;

s3, starting the fan (143), filtering the impurities in the air by the filter screen (142) in the air box (141), and the wind is conveyed to the inside of the wind outlet pipe (145) through the connecting pipe (144), at the moment, the wind in the wind outlet pipe (145) enters the inside of the main pipe (2) through the rotary joint (13), the wind in the main pipe (2) enters the branch pipe (3) through the one-way valve (5), the wind in the branch pipe (3) enters the inside of the pigment through the wind hole (4), thereby generating aeration inside the pigment, discharging the gas inside the mixing tank (1) through the feed hopper (15), after the pigment is mixed, the electromagnetic valve (17) is opened, the pigment in the mixing tank (1) is discharged through the discharge pipe (16), under the effect of connecting rod (6), scraper blade (7) rotate along with being responsible for (2) to scrape clearly the pigment that adsorbs on blending tank (1) inner wall.

Technical Field

The invention belongs to the field of mixing devices, and particularly relates to a pigment mixing device for rust-proof paint spraying of a large blast furnace and a using method thereof.

Background

The blast furnace is mainly used for smelting qualified molten iron by using iron ore and coke, so that the qualified molten iron is used for converter steelmaking, the blast furnace is large in size and exposed outdoors in use for a long time, the service life of the blast furnace is prolonged, the blast furnace is required to be painted outside, rust-proof nursing is realized, before the blast furnace is painted, various rust-proof pigments are required to be fully mixed, so that the rust-proof effect is ensured, most of the existing pigment mixing devices are carried out by adopting a single stirring mode when in use, the pigments are layered easily due to the single stirring mode, the quality of mixing of various pigments cannot be ensured, meanwhile, the existing mixing devices do not have the heating function, and the pigments are easy to solidify in the mixing process, so that the waste of raw materials is caused.

The invention content is as follows:

the present invention has been made to solve the above problems, and an object of the present invention is to provide a pigment mixing device for rust-preventive paint spray of a large blast furnace and a method for using the same, which solve the problems mentioned in the background art.

In order to solve the above problems, the present invention provides a technical solution:

the utility model provides a pigment mixing arrangement for rust-resistant paint spraying of big blast furnace, includes blending tank, the person in charge, branch pipe, retaining chamber, hybrid module, drive assembly and air feed subassembly, the blending tank internal rotation is connected with the person in charge, the person in charge outside symmetry fixedly connected with branch pipe, just the branch pipe all communicates with the person in charge, the wind hole has been seted up to the inside equidistance of branch pipe, the inside check valve that all is equipped with of branch pipe, the retaining chamber has been seted up to the blending tank inside, one side equidistance and the fixedly connected with electrothermal tube of retaining intracavity wall, the blending tank outside is equipped with and is used for driving the hybrid module that pigment rolled, the blending tank top is equipped with and is used for driving the person in charge pivoted drive assembly, the top of being responsible for extends to the outside and fixedly connected with rotary joint of blending tank, the blending tank top is equipped with and is used for the air feed subassembly of being responsible for inside to blow.

Preferably, the outer part of the main pipe is symmetrically and fixedly connected with two connecting rods, two connecting rods correspond to scraping plates fixedly connected between the connecting rods, and one side, far away from the connecting rods, of each scraping plate is in contact with the inner wall of the mixing tank.

Preferably, the mixing tank is fixedly connected with a water inlet pipe inside, and one end of the water inlet pipe extends to the inside of the water storage cavity.

As preferred, the mixing assembly includes mounting bracket, motor, pivot and mixing frame, one side fixedly connected with mounting bracket of inlet tube is just kept away from in the mixing tank outside, one side fixedly connected with motor of mixing tank is just kept away from in the mounting bracket outside, the output of motor runs through mounting bracket and fixedly connected with pivot, the one end that the motor was kept away from in the pivot extends to mixing tank inside and fixedly connected with mixing frame.

Preferably, the driving assembly comprises a driving bevel gear, a shaft sleeve, a transmission shaft, a driven bevel gear, a driving belt pulley and a driven belt pulley, the shaft sleeve is symmetrically and fixedly connected to the outer portion of the mixing tank and located above the mounting frame, the shaft sleeve is connected to the inner portion of the shaft sleeve in a rotating mode, the driven bevel gear is fixedly connected to the bottom of the transmission shaft, the driving bevel gear is sleeved on the outer portion of the rotating shaft and meshed with the driven bevel gear, the driving belt pulley is fixedly connected to the top of the transmission shaft, the driven belt pulley is sleeved on the outer portion of the main pipe and located below the rotary joint, and the driving belt pulley and the driven belt pulley are connected in a belt transmission mode.

As preferred, the air feed subassembly includes bellows, filter screen, fan, connecting pipe and goes out the tuber pipe, the blending tank top just is located one side fixedly connected with bellows of being responsible for, the inside fixedly connected with filter screen of bellows, bellows top fixedly connected with fan, the input fixedly connected with connecting pipe of fan, the one end that the fan was kept away from to the connecting pipe extends to inside the bellows, the output fixedly connected with of fan goes out the tuber pipe, go out the one end that the fan was kept away from to the tuber pipe and swivel joint's heat dissipation end fixed connection.

Preferably, the mixing tank top just is located one side fixedly connected with feeder hopper that bellows kept away from the person in charge, just the bottom of feeder hopper extends to inside the mixing tank.

Preferably, a material discharging pipe is fixedly connected to the outer portion of the mixing tank and located right below the water inlet pipe, and an electromagnetic valve is fixedly connected to the outer portion of the material discharging pipe.

Preferably, the mixing tank is externally and fixedly connected with a control panel below the water inlet pipe, and the electric heating pipe, the motor, the fan and the electromagnetic valve are electrically connected with the control panel.

A use method of a pigment mixing device for rust-proof paint spraying of a large blast furnace comprises the following steps:

s1, when the device is used, a worker starts the device through a control panel, then pours pigment into the mixing tank through a feed hopper, injects water into the water storage cavity through a water inlet pipe, heats the water in the water storage cavity through an electric heating pipe, then starts a motor, drives a rotating shaft to rotate at the moment, drives a mixing frame at the bottom of the mixing tank to rotate at the moment, and stirs the pigment at the bottom of the mixing tank;

s2, the rotating shaft drives a driving bevel gear to rotate in the rotating process, the driving bevel gear drives a driven bevel gear to rotate, the driven bevel gear drives a transmission shaft to rotate in the shaft sleeve, a driving belt pulley rotates under the driving of the transmission shaft, the driving belt pulley drives a driven belt pulley to rotate in a matching way with a belt, and the driven belt pulley drives a main pipe and a branch pipe to rotate in the mixing tank, so that the pigments in the mixing tank are mixed;

s3, start the fan, the inside filter screen of bellows filters the impurity in the air this moment, and carry wind to the tuber pipe inside through the connecting pipe, at this moment, the wind in the tuber pipe passes through rotary joint and gets into the person in charge inside, be responsible for inside wind and pass through the check valve and get into the branch pipe, wind in the branch pipe passes through wind hole and gets into inside the pigment, thereby produce the aeration inside at the pigment, the inside gas of blending tank passes through the feeder hopper and discharges, after the pigment mixture finishes, open the solenoid valve, the inside pigment of blending tank is discharged through arranging the material pipe this moment, under the effect of connecting rod, the scraper blade is followed and is responsible for and rotate, thereby scrape clearly absorbent pigment on the blending tank inner wall.

The invention has the beneficial effects that: join in marriage through the air feed subassembly and be responsible for and the branch pipe advances to use, can be to the inside air feed that lasts of blending tank, thereby at the inside aeration that takes place of blending tank pigment, be favorable to improving the quality of pigment mixture, use through water storage cavity cooperation electrothermal tube, can be with the inside water heating of water storage cavity, thereby improve the inside temperature of blending tank, can avoid pigment at the inside solidification of blending tank, can drive the pigment of blending tank bottom through the blending assembly and roll, the phenomenon of pigment layering of having avoided of very big degree, can drive through the drive assembly and be responsible for and the branch pipe rotates, can improve the quality that pigment mixes.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

In the figure: 1. a mixing tank; 2. a main pipe; 3. a branch pipe; 4. a wind hole; 5. a one-way valve; 6. a connecting rod; 7. a squeegee; 8. a water storage cavity; 9. an electric heating tube; 10. a water inlet pipe; 11. a mixing assembly; 111. a mounting frame; 112. a motor; 113. a rotating shaft; 114. a mixing frame; 12. a drive assembly; 121. a drive bevel gear; 122. a shaft sleeve; 123. a drive shaft; 124. a driven bevel gear; 125. a drive pulley; 126. a driven pulley; 13. a rotary joint; 14. a wind supply assembly; 141. an air box; 142. filtering with a screen; 143. a fan; 144. a connecting pipe; 145. an air outlet pipe; 15. a feed hopper; 16. a discharge pipe; 17. an electromagnetic valve; 18. a control panel.

The specific implementation mode is as follows:

as shown in fig. 1 to 3, the following technical solutions are adopted in the present embodiment:

example (b):

a pigment mixing device for rust-proof paint spraying of a large blast furnace comprises a mixing tank 1, a main pipe 2, branch pipes 3, a water storage cavity 8, a mixing component 11, a driving component 12 and an air supply component 14, wherein the main pipe 2 is rotatably connected inside the mixing tank 1, the branch pipes 3 are symmetrically and fixedly connected outside the main pipe 2, the branch pipes 3 are communicated with the main pipe 2, air holes 4 are formed in the branch pipes 3 at equal intervals and can continuously supply air to the inside of the mixing tank 1, so that aeration is generated in the pigment inside the mixing tank 1, the effect of pigment mixing is favorably improved, check valves 5 are arranged in the branch pipes 3 and can prevent the pigment from entering the inside of the main pipe 2, the water storage cavity 8 is formed in the mixing tank 1, electric heating tubes 9 are fixedly connected at equal intervals on one side of the inner wall of the water storage cavity 8, the temperature inside the mixing tank 1 is improved, and the solidification of the pigment in the mixing tank 1 can be avoided, mixing tank 1 outside is equipped with and is used for driving mixing assembly 11 that pigment rolled, and mixing tank 1 top is equipped with and is used for driving and is responsible for 2 pivoted drive assembly 12, and the top of being responsible for 2 extends to mixing tank 1 outside and fixedly connected with rotary joint 13, and convenient and be responsible for 2 and play tuber pipe 145 cooperation use to the effect that the realization lasts the air feed, mixing tank 1 top is equipped with and is used for the air feed subassembly 14 to being responsible for 2 inside bloies.

Wherein, be responsible for two connecting rods 6 of 2 outside symmetry fixedly connected with, fixedly connected with scraper blade 7 between two corresponding connecting rods 6, scraper blade 7 keeps away from one side of connecting rod 6 and the inner wall contact of blending tank 1, can clear up the raw materials on the 1 inner wall of blending tank to avoid pigment extravagant.

Wherein, 1 inside fixedly connected with inlet tube 10 of blending tank, and the one end of inlet tube 10 extends to the water storage chamber 8 inside, conveniently adds water to the water storage chamber 8 is inside to ensure the normal use of equipment.

Wherein, mixing component 11 includes mounting bracket 111, motor 112, pivot 113 and mixing frame 114, one side fixedly connected with mounting bracket 111 of inlet tube 10 is just kept away from to mixing tank 1 outside, one side fixedly connected with motor 112 of mixing tank 1 is just kept away from to mounting bracket 111 outside, motor 112's output runs through mounting bracket 111 and fixedly connected with pivot 113, motor 112 was kept away from to pivot 113 one end extends to mixing tank 1 inside and fixedly connected with mixing frame 114, the pigment that can drive mixing tank 1 bottom rolls, the phenomenon of the pigment layering has been avoided to very big degree.

Wherein, drive assembly 12 includes drive bevel gear 121, axle sleeve 122, transmission shaft 123, driven bevel gear 124, drive pulley 125 and driven pulley 126, mixing tank 1 is outside and be located the top symmetry fixedly connected with axle sleeve 122 of mounting bracket 111, two axle sleeve 122 internal rotation are connected with transmission shaft 123, the bottom fixedly connected with driven bevel gear 124 of transmission shaft 123, drive bevel gear 121 has been cup jointed to the 113 outside of pivot, drive bevel gear 121 is connected with driven bevel gear 124 meshing, transmission shaft 123 top fixedly connected with drive pulley 125, it has been cup jointed driven pulley 126 to be responsible for 2 outsides and the below that is located rotary joint 13, be connected through belt transmission between drive pulley 125 and the driven pulley 126, can drive and be responsible for 2 and branch pipe 3 and rotate, can improve the quality of pigment mixing.

Wherein, the air feed subassembly 14 includes bellows 141, the filter screen 142, the fan 143, connecting pipe 144 and play tuber pipe 145, one side fixedly connected with bellows 141 at the 1 top of blending tank and the person in charge 2 that is located, the inside fixedly connected with filter screen 142 of bellows 141, bellows 141 top fixedly connected with fan 143, the input fixedly connected with connecting pipe 144 of fan 143, the one end that fan 143 was kept away from to connecting pipe 144 extends to inside of bellows 141, the output fixedly connected with play tuber pipe 145 of fan 143, the one end that fan 143 was kept away from to play tuber pipe 145 and rotary joint 13's heat dissipation end fixed connection, can filter the outside air, and continuously supply wind to 1 inside of blending tank, thereby make 1 inside pigment of blending tank produce the effect of aeration.

Wherein, 1 top of blending tank and be located bellows 141 and keep away from one side fixedly connected with feeder hopper 15 of being responsible for 2, and inside the bottom of feeder hopper 15 extended to blending tank 1, conveniently pour the raw materials into blending tank 1.

Wherein, mixing tank 1 outside just is located inlet tube 10 under fixedly connected with row material pipe 16, arrange the outside fixedly connected with solenoid valve 17 of material pipe 16, can concentrate the collection to the pigment in mixing tank 1.

Wherein, the mixing tank 1 is fixedly connected with a control panel 18 outside and below the water inlet pipe 10, and the electric heating pipe 9, the motor 112, the fan 143 and the electromagnetic valve 17 are all electrically connected with the control panel 18, so as to perform centralized control on the equipment, thereby facilitating the operation of the workers.

A use method of a pigment mixing device for rust-proof paint spraying of a large blast furnace comprises the following steps:

s1, when the device is used, a worker starts the device through the control panel 18, then pours the pigment into the mixing tank 1 through the feed hopper 15, injects water into the water storage cavity 8 through the water inlet pipe 10, heats the water in the water storage cavity 8 through the electric heating pipe 9, then starts the motor 112, at the moment, the motor 112 drives the rotating shaft 113 to rotate, at the moment, the rotating shaft 113 drives the mixing rack 114 at the bottom of the mixing tank 1 to rotate, and therefore the pigment at the bottom of the mixing tank 1 is stirred;

s2, the rotating shaft 113 drives the driving bevel gear 121 to rotate in the rotating process, at this time, the driving bevel gear 121 drives the driven bevel gear 124 to rotate, meanwhile, the driven bevel gear 124 drives the transmission shaft 123 to rotate inside the shaft sleeve 122, the driving pulley 125 rotates under the driving of the transmission shaft 123, at this time, the driving pulley 125 drives the driven pulley 126 to rotate in cooperation with a belt, at this time, the driven pulley 126 drives the main pipe 2 and the branch pipe 3 to rotate inside the mixing tank 1, and therefore the pigments inside the mixing tank 1 are mixed;

s3, start the fan 143, the inside filter screen 142 of bellows 141 filters the impurity in the air this moment, and carry wind to the tuber pipe 145 inside through the connecting pipe 144, at this moment, the wind in the tuber pipe 145 gets into through rotary joint 13 and is responsible for 2 insidely, be responsible for 2 inside wind and get into in the branch pipe 3 through check valve 5, wind in the branch pipe 3 gets into inside the pigment through wind hole 4, thereby produce the aeration in the pigment inside, the inside gas of blending tank 1 discharges through feeder hopper 15, after the pigment mixes, open solenoid valve 17, the inside pigment of blending tank 1 discharges through arranging the material pipe 16 this moment, under the effect of connecting rod 6, scraper 7 follows and is responsible for 2 and rotate, thereby scrape clearly to the pigment that adsorbs on the blending tank 1 inner wall.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.