An environmentally friendly sealing device for copper smelting conveyor belts

Abstract

This invention discloses an environmentally friendly sealing device for a copper smelting conveyor belt, comprising a support frame, a smelting furnace located at one end of the support frame, and further comprising: a feeding unit located at the upper end of the support frame for continuously feeding copper powder into the smelting furnace; and a discharging unit, including an extension component located at the discharge end of the feeding unit for containing the copper powder discharged from the feeding unit and transferring it from above the smelting furnace to the interior of the smelting furnace, and a dust-blocking component located at the bottom of the extension component for simultaneously sealing the area below the inlet of the extension component during its lifting and lowering process. By using rotating rollers to gradually rewind the dust-blocking cloth, excess length of dust-blocking cloth generated during the gradual ascent of the lifting plate is simultaneously rewound by the rotating rollers until the lifting plate moves from inside the smelting furnace to the top, at which point the drive motor stops rotating, and the copper powder conveying operation also stops, completing the loading of the smelting furnace and effectively preventing copper powder from escaping during the feeding process, thus avoiding waste of copper resources.

Description

Technical Field

[0001] This invention relates to the field of copper smelting and transportation technology, specifically to an environmentally friendly sealing device for a copper smelting conveyor belt. Background Technology

[0002] Currently, copper smelting involves a complex material conveying system, from the stockpiling of various mineral powders and lumps to the distribution of feed to each furnace. In existing copper smelting belt conveyors, copper powder or lumps are usually discharged directly from the higher outlet of the conveyor, resulting in copper powder flying between the conveyor's discharge port and the furnace opening. This seriously affects the working environment at the smelting site, and the large amount of copper powder escaping leads to significant copper resource waste. Therefore, the existing copper smelting material conveying system needs further improvement.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0004] The purpose of this invention is to provide an environmentally friendly sealing device for a copper smelting conveyor belt, in order to solve the problem mentioned in the background art where the prior art lacks a copper powder sealing device between the conveyor discharge port and the smelting furnace, causing copper powder to fly everywhere during the unloading process of the conveyor, which not only wastes a lot of copper resources, but also poses a great health hazard to on-site workers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An environmentally friendly sealing device for a copper smelting conveyor belt includes a support frame, a smelting furnace located at one end of the support frame, and further includes:

[0007] A feeding unit, located at the upper end of the support, is used to continuously feed copper powder into the smelting furnace;

[0008] The feeding unit includes an extension component located at the discharge end of the feeding unit for containing the copper powder fed by the feeding unit and transferring it from above the smelting furnace to inside the smelting furnace, and a dust-blocking component located at the bottom of the extension component for simultaneously sealing the area below the feed inlet of the extension component during the lifting and lowering process of the extension component.

[0009] Furthermore, the feeding unit includes:

[0010] The drive roller is mounted on the upper end of the bracket;

[0011] A conveyor belt, fitted over the outside of the drive roller, is used to convey copper powder.

[0012] A cover, installed on the upper end of the bracket and located outside the conveyor belt, is used to enclose the conveyor belt;

[0013] Multiple sets of support rods are fixedly connected to the upper end of the bracket and distributed on both sides of the conveyor belt. A guide roller for guiding the movement of the conveyor belt is rotatably inserted into one side of the support rod.

[0014] Furthermore, the extension component includes:

[0015] The mounting bracket has two sets, which are respectively installed on both sides of the bracket;

[0016] A vertical frame is fixedly connected to one end of the two sets of mounting brackets. A first guide rail is provided inside the vertical frame and directly above the top opening of the smelting furnace. A feed inlet is provided on one side of the vertical frame located at the discharge end of the feeding unit.

[0017] The lifting plate is slidably inserted into the first guide rail. Inside the lifting plate and on one side of the discharge end of the discharge unit, there is a feeding chute for guiding the material released by the discharge unit into the smelting furnace.

[0018] A sliding plate is fixedly connected to one side of the vertical frame and is used to guide the material released by the feeding unit into the feed inlet.

[0019] Furthermore, the width of the feeding trough is equal to the width of the feeding port;

[0020] The feeding chute extends from the initial end of one side of the lifting plate to the lower end of the lifting plate.

[0021] Furthermore, the extension component also includes:

[0022] A rack is fixedly connected to one side of the lifting plate, and a second guide rail is provided on the outside of the rack and inside the vertical frame;

[0023] The first mounting block is fixedly connected to one side of the vertical frame;

[0024] The first driven shaft is rotatably connected inside the first mounting block;

[0025] A spur gear is fixedly sleeved on the outside of the first driven shaft and located between the first mounting blocks. The spur gear meshes with the rack. A reserved groove is provided on the outside of the spur gear and inside the vertical frame.

[0026] The first helical gear is fixedly connected to one end of the first driven shaft;

[0027] The second helical gear meshes with the first helical gear;

[0028] A drive motor is mounted on the upper end of the mounting bracket. The drive end of the drive motor is connected to a drive shaft, which is used to drive the second helical gear to rotate.

[0029] Furthermore, the dust-blocking assembly includes:

[0030] The second mounting block is fixedly connected to the lower end of the sliding plate;

[0031] The second driven shaft is rotatably inserted into the second mounting block;

[0032] The belt has one end fitted on the outside of the second driven shaft near the end, and the other end fitted on the outside of the drive shaft;

[0033] The rotating roller is fixedly sleeved on the outside of the second driven shaft and located inside the second mounting block;

[0034] Dust-blocking cloth is wrapped around the outside of the rotating roller;

[0035] A sealing mechanism is located on one side of the lifting plate and is used to move the dust-blocking cloth to the discharge chute for sealing.

[0036] Furthermore, the sealing mechanism includes:

[0037] The third mounting block is fixedly connected to the lower end of the vertical frame and located on one side of the lifting plate;

[0038] A limiting roller is rotatably connected to one side of the third mounting block and is used to press the dust-blocking cloth against one side of the lifting plate.

[0039] The fourth mounting block is fixedly connected to the lower part of one side of the lifting plate;

[0040] A pull rod is fixedly connected to one side of the fourth mounting block, and one end of the dust-blocking cloth is connected to the pull rod to pull the dust-blocking cloth up and down along the limiting roller.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] 1. In this invention, a drive shaft drives a second helical gear to rotate. The second helical gear, through a first helical gear, drives a first driven shaft to rotate. The first driven shaft, through a spur gear, in conjunction with a rack, moves a lifting plate downwards along a second guide rail, causing the lifting plate to move from above the smelting furnace to the bottom of the furnace interior. Simultaneously, a drive motor, through a drive shaft, drives a belt to rotate. The belt, through the second driven shaft, drives a rotating roller to rotate. The rotating roller gradually unwinds the ash-blocking cloth, causing the lifting plate, as it moves downwards along the vertical frame, to be simultaneously pulled downwards by a pull rod along the unwinding ash-blocking cloth unwound by the rotating roller. At the limit roller... Under the limiting effect of the ash-blocking cloth, the ash-blocking cloth will move to the side of the lifting plate behind the upright frame to cover the corresponding feeding chute. Then, the motor on the side of the drive roller is started. The motor drives the conveyor belt to rotate continuously through the drive roller, placing the copper powder at the initial end of the conveyor belt. The conveyor belt transfers the copper powder to the upper end of the sliding plate for release. The sliding plate guides the released copper powder into the feeding chute through the feed inlet. Subsequently, the copper powder falls into the smelting furnace along the feeding chute. The entire copper powder feeding process is carried out in a fully enclosed manner, effectively preventing the copper powder from flying during the process of entering the smelting furnace.

[0043] 2. In this invention, as copper powder gradually enters the smelting furnace, the height of the accumulated copper powder inside the furnace gradually increases. At this time, the drive motor is controlled to rotate in both directions. The drive motor drives the first helical gear to rotate in the opposite direction through the second helical gear. The first helical gear drives the spur gear to rotate in both directions under the action of the first driven shaft. The spur gear drives the lifting plate to move upward along the first guide rail through the rack. This ensures that the height of the lifting plate can be automatically increased synchronously as the copper powder gradually accumulates in the smelting furnace, thus avoiding the accumulation of copper powder inside the feeding trough and causing blockage of the feeding trough.

[0044] 3. In this invention, while the drive motor drives the second helical gear to reverse, the drive motor also drives the second driven shaft to reverse via a belt. The second driven shaft drives the dust-blocking cloth to gradually roll up via a rotating roller. This causes the excess length of dust-blocking cloth generated during the gradual ascent of the lifting plate to be synchronously rolled up by the rotating roller. When the lifting plate moves from inside the smelting furnace to the top, the drive motor stops rotating, and the copper powder conveying operation also stops, completing the charging operation of the smelting furnace. This ensures that the opening located below the vertical frame and on one side of the feeding chute is always covered by the dust-blocking cloth throughout the entire copper powder feeding process, effectively preventing copper powder from escaping during the feeding process and causing waste of copper resources. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0046] Figure 2 This is a schematic diagram of the internal structure of the feeding unit of the present invention;

[0047] Figure 3This is a schematic diagram of the feeding unit structure of the present invention;

[0048] Figure 4 This is a diagram showing the coordination relationship between the smelting furnace and the charging unit of this invention;

[0049] Figure 5 This is a schematic diagram of the extended component structure of the present invention;

[0050] Figure 6 This is a schematic diagram of the dustproof component structure of the present invention;

[0051] Figure 7 This is a diagram showing the final state of the material entering the smelting furnace according to the present invention.

[0052] Figure 8 This is a diagram showing the initial state of the material entering the smelting furnace according to the present invention.

[0053] Reference numerals: 100, bracket; 101, smelting furnace; 102, guide plate; 103, cover plate; 1, feeding unit; 11, drive roller; 12, conveyor belt; 13, baffle; 14, support rod; 15, guide roller; 2, unloading unit; 21, extension assembly; 210, mounting frame; 211, vertical frame; 2110, feed inlet; 2111, reserved groove; 2112, first mounting block; 212, first guide rail; 2121, second guide rail; 213, lifting plate; 2131, rack; 21 32. Feed chute; 214. Sliding plate; 215. Spur gear; 2151. First driven shaft; 216. First helical gear; 217. Second helical gear; 218. Drive motor; 2181. Drive shaft; 22. Dustproof assembly; 221. Second mounting block; 222. Second driven shaft; 223. Belt; 224. Rotary roller; 225. Dust-blocking cloth; 226. Sealing mechanism; 2261. Third mounting block; 2262. Limiting roller; 2263. Fourth mounting block; 2264. Pull rod. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Please see Figure 1-8 The present invention provides a technical solution:

[0056] An environmentally friendly sealing device for a copper smelting conveyor belt includes a support 100, a smelting furnace 101 located at one end of the support 100, and further includes:

[0057] The feeding unit 1 is located at the upper end of the support 100 and is used to continuously feed copper powder into the smelting furnace 101.

[0058] The feeding unit 2 includes an extension component 21 located at the discharge end of the feeding unit 1 for containing the copper powder fed by the feeding unit 1 and transferring it from above the smelting furnace 101 to the inside of the smelting furnace 101, and a dust-blocking component 22 located at the bottom of the extension component 21 for simultaneously blocking the area below the feed inlet 2110 of the extension component 21 during the lifting and lowering process of the extension component 21.

[0059] As an improvement, such as Figure 1-2 As shown, the feeding unit 2 includes:

[0060] Drive roller 11 is installed on the upper end of the bracket 100;

[0061] The conveyor belt 12 is sleeved on the outside of the drive roller 11 and is used to convey copper powder;

[0062] A cover 13 is installed on the upper end of the bracket 100 and located outside the conveyor belt 12, for sealing the conveyor belt 12;

[0063] Multiple sets of support rods 14 are fixedly connected to the upper end of the bracket 100 and distributed on both sides of the conveyor belt 12. A guide roller 15 for guiding the movement of the conveyor belt 12 is rotatably inserted into one side of the support rod 14.

[0064] A motor for driving the drive roller 11 to rotate is provided on one side, which is not shown in the figure.

[0065] As an improvement, such as Figure 3-5 As shown, the extension component 21 includes:

[0066] Mounting bracket 210 is provided in two sets, which are respectively installed on both sides of the bracket 100;

[0067] A vertical frame 211 is fixedly connected to one end of the two sets of mounting brackets 210. A first guide rail 212 is provided inside the vertical frame 211 and directly above the top opening of the smelting furnace 101. A feed inlet 2110 is provided on one side of the vertical frame 211 located at the discharge end of the feeding unit 2.

[0068] The lifting plate 213 is slidably inserted into the first guide rail 212. The lifting plate 213 is provided with a feeding trough 2132 inside the lifting plate 213 and on one side of the discharge end of the feeding unit 2 for guiding the material released by the feeding unit 2 into the smelting furnace 101.

[0069] The material slide plate 214 is fixedly connected to one side of the vertical frame 211 and is used to guide the material released by the material discharging unit 2 into the inlet 2110.

[0070] A guide plate 102 is installed at the upper end of the smelting furnace 101, and a cover plate 103 for sealing the top opening of the smelting furnace 101 is slidably inserted into the guide plate 102.

[0071] Furthermore, the width of the feeding trough 2132 is equal to the width of the feeding port 2110;

[0072] The feeding trough 2132 extends from the initial end of one side of the lifting plate 213 to the lower end of the lifting plate 213.

[0073] Furthermore, the extension component 21 also includes:

[0074] A rack 2131 is fixedly connected to one side of the lifting plate 213, and a second guide rail 2121 is provided on the outside of the rack 2131 and inside the vertical frame 211.

[0075] The first mounting block 2112 is fixedly connected to one side of the vertical frame 211;

[0076] The first driven shaft 2151 is rotatably connected inside the first mounting block 2112;

[0077] A spur gear 215 is fixedly sleeved on the outside of the first driven shaft 2151 and located between the first mounting blocks 2112. The spur gear 215 meshes with the rack 2131. A reserved groove 2111 is provided on the outside of the spur gear 215 and inside the upright frame 211.

[0078] The first helical gear 216 is fixedly connected to one end of the first driven shaft 2151;

[0079] The second helical gear 217 meshes with the first helical gear 216;

[0080] A drive motor 218 is mounted on the upper end of the mounting bracket 210. The drive end of the drive motor 218 is connected to a drive shaft 2181, which is used to drive the second helical gear 217 to rotate.

[0081] Among them, such as Figure 5-8 As shown, the dust-blocking assembly 22 includes:

[0082] The second mounting block 221 is fixedly connected to the lower end of the sliding plate 214;

[0083] The second driven shaft 222 is rotatably inserted into the second mounting block 221;

[0084] The belt 223 has one end sleeved on the outer side of the second driven shaft 222 near the end, and the other end sleeved on the outer side of the drive shaft 2181;

[0085] The rotating roller 224 is fixedly sleeved on the outside of the second driven shaft 222 and located inside the second mounting block 221;

[0086] Dust-blocking cloth 225 is wound around the outside of the rotating roller 224;

[0087] The sealing mechanism 226 is located on one side of the lifting plate 213 and is used to drive the dust-blocking cloth 225 to seal the material chute 2132.

[0088] In addition, the sealing mechanism 226 includes:

[0089] The third mounting block 2261 is fixedly connected to the lower end of the vertical frame 211 and located on one side of the lifting plate 213;

[0090] The limiting roller 2262 is rotatably connected to one side of the third mounting block 2261 and is used to press the dust-blocking cloth 225 against one side of the lifting plate 213.

[0091] The fourth mounting block 2263 is fixedly connected to the lower side of the lifting plate 213;

[0092] A pull rod 2264 is fixedly connected to one side of the fourth mounting block 2263. One end of the dust-blocking cloth 225 is connected to the pull rod 2264 and is used to pull the dust-blocking cloth 225 up and down along the limiting roller 2262.

[0093] It should be noted that in the specific implementation process of the present invention, initially, the lifting plate 213 is located above the top opening of the smelting furnace 101, and the cover plate 103 is moved along the guide plate 102 so that the top opening of the smelting furnace 101 is opened.

[0094] like Figure 4-7As shown, the drive motor 218 is started. The drive motor 218 drives the second helical gear 217 to rotate via the drive shaft 2181. The second helical gear 217 drives the first driven shaft 2151 to rotate via the first helical gear 216. The first driven shaft 2151 drives the lifting plate 213 to move downward along the second guide rail 2121 under the action of the spur gear 215 and the rack 2131. This moves the lifting plate 213 from above the smelting furnace 101 to the bottom surface inside the smelting furnace 101. At the same time, the drive motor 218 also drives the belt 223 to rotate via the drive shaft 2181. The belt 223 drives the rotating roller 224 to rotate via the second driven shaft 222. The rotating roller 224 gradually unrolls the dust-blocking cloth 225, so that the lifting plate 213 is synchronously pulled by the pull rod 2264 as it moves downward along the vertical frame 211. The dust-blocking cloth 225 unwound by the rotating roller 224 moves downward. Under the limiting action of the limiting roller 2262, the dust-blocking cloth 225 will move to cover the feeding trough 2132 on the side of the lifting plate 213 behind the upright frame 211. Then, the motor on the side of the drive roller 11 is started. The motor drives the conveyor belt 12 to rotate continuously through the drive roller 11. The copper powder is placed at the initial end of the conveyor belt 12. The conveyor belt 12 transmits the copper powder to the upper end of the sliding plate 214 for release. The sliding plate 214 guides the released copper powder into the feeding trough 2132 through the feed inlet 2110. Subsequently, the copper powder falls into the smelting furnace 101 along the feeding trough 2132. The entire copper powder feeding process is carried out in a fully enclosed manner, which effectively prevents the copper powder from flying during the process of entering the smelting furnace 101.

[0095] like Figure 7-8 As shown, during the process of copper powder gradually entering the smelting furnace 101, the height of the copper powder accumulated in the smelting furnace 101 gradually increases. At this time, the drive motor 218 is controlled to rotate in the opposite direction. The drive motor 218 drives the first helical gear 216 to rotate in the opposite direction through the second helical gear 217. Under the action of the first driven shaft 2151, the first helical gear 216 drives the spur gear 215 to rotate in the opposite direction. The spur gear 215 drives the lifting plate 213 to move upward along the first guide rail 212 through the rack 2131. This ensures that the height of the lifting plate 213 can be automatically increased synchronously during the process of copper powder gradually accumulating in the smelting furnace 101, thus avoiding the accumulation of copper powder in the feeding trough 2132 and causing the feeding trough 2132 to be blocked.

[0096] like Figure 4-8As shown, while the drive motor 218 drives the second helical gear 217 to reverse, the drive motor 218 also drives the second driven shaft 222 to reverse via the belt 223. The second driven shaft 222 drives the dust-blocking cloth 225 to gradually roll up via the rotating roller 224, so that the excess length of the dust-blocking cloth 225 generated during the gradual rise of the lifting plate 213 is synchronously rolled up by the rotating roller 224. When the lifting plate 213 moves from inside the smelting furnace 101 to the top, the drive motor 218 stops rotating, and the copper powder conveying work also stops, completing the loading work of the smelting furnace 101. Thus, throughout the entire copper powder feeding process, the opening located below the vertical frame 211 and on one side of the feeding trough 2132 is always blocked by the dust-blocking cloth 225, effectively preventing the copper powder from escaping during the feeding process and causing waste of copper resources.

[0097] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0098] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly sealing device for a copper smelting conveyor belt, comprising a support (100) and a smelting furnace (101) disposed at one end of the support (100), characterized in that, Also includes: The feeding unit (1) is located at the upper end of the support (100) and is used to continuously feed copper powder into the smelting furnace (101); The feeding unit (2) includes an extension component (21) located at the discharge end of the feeding unit (1) for containing the copper powder fed by the feeding unit (1) and transferring it from above the smelting furnace (101) to the inside of the smelting furnace (101), and a dust-blocking component (22) located at the bottom of the extension component (21) for simultaneously blocking the area below the feed inlet (2110) of the extension component (21) during the lifting and lowering process of the extension component (21); The extension component (21) includes: The mounting bracket (210) is provided in two sets, which are respectively installed on both sides of the bracket (100); The upright frame (211) is fixedly connected to one end of the two sets of mounting brackets (210). The upright frame (211) is provided with a first guide rail (212) inside and directly above the top opening of the smelting furnace (101). The upright frame (211) is provided with a feed inlet (2110) on one side of the discharge end of the feeding unit (1). The lifting plate (213) is slidably inserted into the first guide rail (212). The lifting plate (213) is located inside the first guide rail (212) and on one side of the discharge end of the feeding unit (1) is a feeding trough (2132) for guiding the copper powder released by the feeding unit (1) into the smelting furnace (101). The sliding plate (214) is fixedly connected to one side of the vertical frame (211) and is used to guide the copper powder released by the feeding unit (1) into the feed inlet (2110); The extension component (21) also includes: A rack (2131) is fixedly connected to one side of the lifting plate (213), and a second guide rail (2121) is provided on the outside of the rack (2131) and inside the upright frame (211); The first mounting block (2112) is fixedly connected to one side of the upright frame (211); The first driven shaft (2151) is rotatably connected inside the first mounting block (2112); A spur gear (215) is fixedly sleeved on the outside of the first driven shaft (2151) and located between the first mounting blocks (2112). The spur gear (215) meshes with the rack (2131). A reserved groove (2111) is provided on the outside of the spur gear (215) and inside the upright frame (211). The first helical gear (216) is fixedly connected to one end of the first driven shaft (2151); The second helical gear (217) meshes with the first helical gear (216); A drive motor (218) is mounted on the upper end of the mounting bracket (210). The drive end of the drive motor (218) is connected to a drive shaft (2181) for driving the second helical gear (217) to rotate. The dust-blocking assembly (22) includes: The second mounting block (221) is fixedly connected to the lower end of the sliding plate (214); The second driven shaft (222) is rotatably inserted into the second mounting block (221); The belt (223) is fitted at one end on the outer side of the second driven shaft (222) near the end, and at the other end on the outer side of the drive shaft (2181); The rotating roller (224) is fixedly sleeved on the outside of the second driven shaft (222) and located inside the second mounting block (221); Dust-blocking cloth (225) is wrapped around the outside of the rotating roller (224); A sealing mechanism (226) is located on one side of the lifting plate (213) and is used to drive the dust-blocking cloth (225) to seal the material discharge chute (2132).

2. The environmentally friendly sealing device for a copper smelting conveyor belt as described in claim 1, characterized in that: The feeding unit (1) includes: A drive roller (11) is mounted on the upper end of the bracket (100); A conveyor belt (12) is fitted over the outside of the drive roller (11) for conveying copper powder; A cover (13) is installed on the upper end of the bracket (100) and located outside the conveyor belt (12) for sealing the conveyor belt (12); Multiple sets of support rods (14) are fixedly connected to the upper end of the bracket (100) and distributed on both sides of the conveyor belt (12). A guide roller (15) for guiding the movement of the conveyor belt (12) is rotatably inserted into one side of the support rod (14).

3. The environmentally friendly sealing device for a copper smelting conveyor belt as described in claim 1, characterized in that: The width of the feeding trough (2132) is equal to the width of the feeding port (2110); The feeding trough (2132) extends from the initial end of the lifting plate (213) on one side to the lower end of the lifting plate (213).

4. The environmentally friendly sealing device for a copper smelting conveyor belt as described in claim 1, characterized in that: The sealing mechanism (226) includes: The third mounting block (2261) is fixedly connected to the lower end of the upright frame (211) and located on one side of the lifting plate (213); The limiting roller (2262) is rotatably connected to one side of the third mounting block (2261) and is used to press the dust-blocking cloth (225) against one side of the lifting plate (213); The fourth mounting block (2263) is fixedly connected to the lower side of the lifting plate (213); A pull rod (2264) is fixedly connected to one side of the fourth mounting block (2263). One end of the dust-blocking cloth (225) is connected to the pull rod (2264) for pulling the dust-blocking cloth (225) up and down along the limiting roller (2262).

Images