Calcining machine

Abstract

The invention discloses a calcining machine. The calcining machine comprises an air distribution plate and a discharging device. The discharging device comprises a scraper machine and a collecting box, the scraper machine comprises a scraper, the scraper is arranged on the air distribution plate and arranged to scrape away materials deposited on the air distribution plate, the scraper is arranged to move on the air distribution plate in the set direction, and the collecting box is located on the downstream of the scraper machine in the moving direction of the scraper on the air distribution plate. The collecting device is arranged to collect the materials scraped away by the scraping plate and separate slag blocks in the materials. According to the discharging device, under the condition that the calcining machine does not need to be shut down, slag blocks deposited on the air distribution plate can be cleaned through the scraper, and the slag blocks are separated and discharged by conveying a mixture of the scraped slag blocks and gypsum powder into the collecting box. The discharging device can keep ventilation of the air distribution plate, normal use of the calcining machine is guaranteed, stable quality of calcined gypsum powder is guaranteed, and slag blocks are discharged in a simple and efficient mode.

Description

Technical Field

[0001] The invention relates to the technical field of building material production equipment, and more specifically, to a calcining machine. Background Art

[0002] The calciner uses heat source to calcine the gypsum powder on the air distribution plate, so that the temperature of the gypsum powder at the outlet reaches 150℃ to ensure product performance and quality. When the inflow of gypsum powder exceeds the calcining capacity of the calciner, it will not only affect the performance and quality of the product, but also affect the use of the calciner, and even cause blockage and shorten the service life of the equipment.

[0003] Gravel or stones often accumulate on the air distribution plate, affecting the flow of gypsum powder. Long-term accumulation requires the machine to be shut down to clean up the gravel or stones. Summary of the invention

[0004] An embodiment of the present invention provides a calcining machine, comprising:

[0005] Wind distribution board;

[0006] The unloading device includes a scraper and a collecting box, wherein the scraper includes a scraper, which is arranged on the air distribution plate and configured to scrape away materials deposited on the air distribution plate. The scraper is arranged to move along a set direction on the air distribution plate. The collecting box is located downstream of the scraper along the moving direction of the scraper on the air distribution plate, and is configured to collect the materials scraped away by the scraper of the scraper and separate the slag in the materials.

[0007] In some exemplary embodiments, the collecting box is provided with an air blast port and a slag discharge port. The air blast port is configured to be connected to an air blast device to blow air into the collecting box so that the slag blocks are separated from the material and fall to the bottom of the collecting box; the slag discharge port is provided at the bottom of the collecting box and is configured to discharge the slag blocks.

[0008] In some exemplary embodiments, the collection box includes an inclined side wall, and the blast port is disposed on the side wall of the collection box;

[0009] There are multiple blast holes, and the multiple blast holes are arranged at intervals along the circumference of the collecting box.

[0010] In some exemplary embodiments, the unloading device further comprises a slag discharge valve, which is disposed at the slag discharge port and is configured to open or close the slag discharge port.

[0011] In some exemplary embodiments, the scraper conveyor also includes an endless chain, a first driving device and a driven device, the scraper is fixed to the endless chain, the first driving device is connected to the endless chain, and is configured to drive the endless chain to circulate; the first driving device includes a driver, a transmission device connected to the driver, and a driving sprocket connected to the transmission device, the driven device includes a driven sprocket, and the endless chain is sleeved on the driving sprocket and the driven sprocket.

[0012] In some exemplary embodiments, along the moving direction of the scraper on the air distribution plate, the first driving device is disposed at the downstream end of the air distribution plate, and the driven device is disposed at the upstream end of the air distribution plate.

[0013] In some exemplary embodiments, the slag discharge valve includes a second driving device, a valve seat and a valve core, the second driving device is connected to the valve seat, the valve seat is arranged on the discharge side of the slag discharge port located outside the collecting box, and the slag discharge port can be opened or closed under the drive of the second driving device, and the valve core is arranged on the other side of the valve seat away from the slag discharge port and is pressed against the valve seat.

[0014] In some exemplary embodiments, the mating surfaces of the valve seat and the valve core are both configured as wedge-shaped surfaces, the second driving device is configured to drive the valve seat to move in a first direction parallel to the plane where the slag discharge port is located to close or open the slag discharge port, and the valve core is configured to move in a second direction perpendicular to the first direction under the extrusion action of the valve seat.

[0015] In some exemplary embodiments, the slag discharge valve also includes a pressure rod and an elastic member, the pressure rod presses against one end of the valve core away from the valve seat and / or the pressure rod is connected to one end of the valve core away from the valve seat, and the pressure rod cooperates with the elastic member and is configured to drive the valve core to press against the valve seat under the elastic force of the elastic member.

[0016] In some exemplary embodiments, the elastic member includes a spring, and the slag discharge valve also includes a pressure block and a spring cover, the pressure block and the spring are located in the spring cover, the pressure rod passes through the spring cover, the pressure block is fixedly connected to the pressure rod, the spring is sleeved on the pressure rod, one end of the spring abuts against the pressure block, and the other end of the spring abuts against the spring cover.

[0017] In some exemplary embodiments, the slag discharge valve also includes two nuts, which are located in the spring cover, and the two nuts are threadedly connected to the pressure rod at intervals, and one nut abuts against one end of the pressure block away from the spring, and the other nut abuts against one end of the spring cover away from the spring.

[0018] In some exemplary embodiments, the slag discharge valve also includes a valve box body, one end of the valve box body is connected to the slag discharge port and is provided with a through hole corresponding to the slag discharge port, the other end of the valve box body is connected to the spring cover, the valve seat and the valve core are arranged in the valve box body, the second driving device is fixed to the outside of the valve box body, and the pressure rod extends into the valve box body.

[0019] In some exemplary embodiments, the second driving device is a cylinder including a cylinder body and a piston rod, wherein the cylinder body is fixed to the valve housing, and the piston rod passes through the valve housing and is fixedly connected to the valve seat to drive the valve seat to move.

[0020] In some exemplary embodiments, the calciner further comprises an emergency discharge valve, which is disposed at the slag discharge port and configured to open or close the slag discharge port.

[0021] The calcining machine in the embodiment of the present invention is provided with a discharging device. Without stopping the calcining machine, the slag blocks deposited on the air distribution plate can be cleaned up by a scraper machine, thereby maintaining the ventilation of the air distribution plate, ensuring the normal use of the calcining machine, and ensuring the stability of the quality of the calcined gypsum powder. The slag blocks are separated and discharged by conveying the mixture of the scraped slag blocks and gypsum powder into a collecting box, thereby realizing the discharge of the slag blocks in a simple and efficient manner.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0024] Figure 1 It is a front structural schematic diagram of a calcining machine according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 CC section view of the calciner;

[0026] Figure 3 for Figure 1 BB section view of the calciner;

[0027] Figure 4 for Figure 1 A schematic diagram of the top view of the calcining machine;

[0028] Figure 5for Figure 1 A front structural schematic diagram of a collecting box of a calcining machine;

[0029] Figure 6 for Figure 5 AA section view of the collection box;

[0030] Figure 7 for Figure 5 DD section view of the collection box;

[0031] Figure 8 for Figure 5 A schematic diagram of the top view structure of the collection box;

[0032] Fig. 9 for Figure 8 Schematic diagram of the B-direction structure of the collection box.

[0033] Reference numerals:

[0034] 100-calcining machine;

[0035] 1-air distribution plate, 2-discharging device, 21-scraper, 211-scraper, 212-annular chain, 213-first driving device, 2131-driver, 2132-sprocket, 2133-driving sprocket, 2134-driving transmission shaft, 214-driven device, 2141-driven sprocket, 2142-driven transmission shaft, 2143-tensioning device, 22-collecting box, 221-air blasting port, 222-slag discharge port, 223-inclined side wall, 224-feeding port, 225-vertical side wall, 226-discharging port, 227 - inclined plate, 23- slag discharge valve, 231- second driving device, 2311- cylinder body, 2312- piston rod, 232- valve seat, 2321- first side of valve seat, 2322- second side of valve seat, 233- valve core, 2331- first side of valve core, 2332- second side of valve core, 234- pressure rod, 235- elastic member, 236- pressure block, 237- spring cover, 238- nut, 239- valve box, 2391- through hole, 2392- fixing plate, 2393- fastener, 3- emergency discharge valve, 4- heating pipe. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0037] Reference Figure 1-Figure 9, an embodiment of the present application provides a calcining machine 100, including an air distribution plate 1 and a discharge device 2. During the calcining process of the calcining machine 100, a portion of the material will be deposited on the air distribution plate 1. The discharge device 2 is used to clean the material deposited on the air distribution plate 1 from the air distribution plate 1 and discharge it to an appropriate location. The discharge device 2 includes a scraper 21 and a collecting box 22. The scraper 21 can be arranged between the air distribution plate 1 and the heating tube 4 above. Hot air flows in the heating tube 4 to heat the material (for example, gypsum powder). The air is blown by a blast device under the air distribution plate 1, and the hot air passes through the air distribution plate (uniform small holes are drilled on the air distribution plate) from bottom to top, blowing the material upward. The scraper 21 can be used to clean the material deposited on the air distribution plate 1 from the air distribution plate 1, maintain the ventilation of the air distribution plate 1, and ensure the normal operation of the calcining machine 100 and the stable quality of the material being calcined (for example, gypsum powder). The scraper 21 includes a scraper 211, which is arranged on the air distribution plate 1 and is arranged to scrape away the materials deposited on the air distribution plate 1. The scraper 211 scrapes off the deposited materials by mechanical action to prevent these materials from clogging the air distribution plate 1. The scraper 211 is arranged to move along a set direction on the air distribution plate 1. The scraper 211 can perform a translational motion along a straight line on the air distribution plate 1 to scrape off the materials and transport the materials by pushing. It should be understood that the scraper 211 can also perform a rotational motion along a central axis on the air distribution plate 1. There can be one scraper 211, or a plurality of scrapers 211 can be provided at intervals.

[0038] The collecting box 22 is located downstream of the scraper 21 along the moving direction of the scraper 21 on the air distribution plate 1, and is configured to collect the material scraped away by the scraper 211 of the scraper 21 and separate the slag from the material. The material scraped away by the scraper 211 of the scraper 21 is disposed at the output side of the scraper 21 (e.g., Figure 1 The gypsum powder is scraped off by the scraper 211 of the scraper 21 and is transported to the collection box 22. The material scraped off by the scraper 211 of the scraper 21 may be a mixture of gypsum powder and slag (for example, gravel or stone). The scraped gypsum powder is separated from the slag by the collection box 22, which can reduce the waste rate of the gypsum powder and improve the utilization rate of the gypsum powder. The slag can be discharged from the collection box 22. The collection box 22 may be provided with one or more. Figure 2 2 shows two collecting boxes 22 arranged side by side adjacent to the output side of the scraper 21. The collecting box 22 includes an open feed port 224 at the top, which is connected to the output side of the air distribution plate 1 to receive the material scraped away from the scraper 21.

[0039] To summarize, the calciner 100 of the embodiment of the present application is provided with a unloading device 2. Without the need to shut down the calciner 100, the scraper 21 is used to clean up the slag (for example, gravel or stones) deposited on the air distribution plate 1, thereby maintaining the ventilation of the air distribution plate 1, ensuring the normal use of the calciner, ensuring the stability of the quality of the calcined gypsum powder, and transporting the mixture of the scraped slag and gypsum powder to the collecting box 22, where the slag is separated, thereby facilitating slag discharge in a simple and efficient manner.

[0040] In some exemplary embodiments, Figure 1 , Figure 2 and Figure 5 As shown, the collecting box 22 is provided with an air blasting port 221 and a slag discharge port 222. The air blasting port 221 is arranged to be connected to an air blasting device to blow air into the collecting box 22, so that the slag blocks are separated from the materials and fall to the bottom of the collecting box 22. The air blasting device can be an air compressor. The air compressor introduces compressed air into the collecting box 22 through the air blasting port 221, and uses the strong airflow of the compressed air to fully disperse the gypsum powder, while the slag blocks (gravel or stone) fall to the bottom of the collecting box 22 due to their own gravity and can be discharged from the slag discharge port 222. The air blasting port 221 can be arranged at a middle position or a lower position of the collecting box 22. The slag discharge port 222 can be arranged at the bottom of the collecting box 22, and is arranged to discharge the slag blocks that fall to the bottom of the collecting box 22. This slag discharge method has a simple structure and uses the gravity of the slag blocks to automatically discharge slag. It should be understood that in addition to separating the gypsum powder and the slag by blowing, the gypsum powder and the slag can also be separated by other means.

[0041] In some exemplary embodiments, Figure 1 , Figure 2 and Figure 5 As shown, the collecting box 22 includes an inclined side wall 223, and the blast port 221 is arranged on the side wall 223 of the collecting box 22. The collecting box 22 is uprightly connected to the output side of the scraper 21 of the calciner 100. A plurality of side walls 223 inclined toward the center of the collecting box 22 may be provided near the feed port of the collecting box 22. These side walls 223 form an inverted cone and surround the feed port 224, so that the material received by the collecting box 22 can flow smoothly along the inclined side wall 223 under the action of gravity. An upright side wall 225 is connected below the inclined side wall 223, and a slag discharge port 222 is arranged on the upright side wall 225, and the fallen slag blocks are discharged from the slag discharge port 222. The blast port 221 is arranged on the side wall 223, so that the opening of the blast port 221 faces the oblique upward direction (such as Figure 2 The gypsum powder is fully blown in an oblique upward direction by blowing air (compressed air) through the blast port 221. Figure 2As can be seen in the figure, each of the opposite side walls 223 of the collection box 22 is provided with an air blast port 221, which further increases the fluidity of the air and enhances the effect of blowing away the gypsum powder. Preferably, the inclined side wall 223 of the collection box 22 is 60 degrees relative to the horizontal direction, and the opening of the air blast port 221 is 30 degrees upward relative to the horizontal plane. The collection box 22 may include an inclined side wall 223 and an upright side wall 225 connected to the lower side of the inclined side wall 223, the air blast port 221 is provided at the inclined side wall 223, and the slag discharge port 222 is provided at the upright side wall 225.

[0042] Optionally, the number of the blast ports 221 may be multiple, and the multiple blast ports 221 are arranged at intervals along the circumference of the collection box 22. For example, the blast ports 221 may be arranged on a non-inclined circumferential wall of the collection box 22. It should be understood that the blast ports 221 may also be arranged at other positions of the collection box 22, for example, on the bottom wall of the collection box 22, etc.

[0043] like Figure 5 As shown, in the collecting box 22, an inclined plate 227 may be provided near the slag discharge port 222. The inclined plate 227 may be a steel plate. The inclined plate 227 is provided with a plurality of small holes. Air is blown through the blast port 221 located below the inclined plate 227 to blow the gypsum powder upward, and the slag blocks fall onto the inclined plate 227 due to their own gravity and move to the slag discharge port 222 along the slope of the inclined plate 227. The slag discharge port 222 may be set to open at a fixed time so as to discharge the slag blocks accumulated to a certain amount.

[0044] In some exemplary embodiments, Figure 1-Figure 2 , Figure 5-Figure 6 and Figure 8-Figure 9 As shown, the unloading device 2 further includes a slag discharge valve 23, which is disposed at the slag discharge port 222 and is configured to open or close the slag discharge port 222. The slag discharge valve 23 is disposed outside the collecting box 22 and is disposed on one side of the slag discharge port 222. When slag discharge is required, the slag discharge valve 23 is opened to open the slag discharge port 222, so that the slag blocks in the collecting box 22 can be smoothly discharged from the slag discharge port 222; when slag discharge is not required, the slag discharge valve 23 is closed, and the slag discharge valve 23 completely blocks the slag discharge port 222 to prevent the gypsum powder in the collecting box 22 from leaking. The slag discharge valve 23 can be manual, electric, pneumatic, etc.

[0045] In some exemplary embodiments, Figures 1 to 4 As shown, the scraper 21 also includes an endless chain 212, a first driving device 213 and a driven device 214. The first driving device 213 is connected to the endless chain 212 and is configured to drive the endless chain 212 to circulate. The scraper 211 is fixed to the endless chain 212, and the endless chain 212 drives the scraper 211 to move along the running path of the endless chain 212 when the endless chain 212 circulates. Figures 2 to 4Two circular chains 212 can be seen, which are respectively arranged on both sides of the wind distribution plate 1 in the lateral direction. The scraper 211 extends along the lateral direction of the wind distribution plate 1, and the two ends of the scraper 211 are respectively fixed to the two circular chains 212. There can be multiple scrapers 211, and the multiple scrapers 211 are arranged at intervals along the circular chains 212. In this embodiment, the scraper 211 is preferably set to two. Of course, the number of the circular chain 212 can also be one (located in the middle of the scraper 211 and has a certain width), or three, four or more, as long as it can drive the scraper 211 to move.

[0046] The first driving device includes a driver 2131, a transmission device (eg, a sprocket 2132) connected to an output shaft of the driver 2131, and a driving sprocket 2133 connected to the transmission device. The driven device 214 includes a driven sprocket 2141. The driver 2131 may be a motor. Figure 4 2 shows two driving sprockets 2133 and two driven sprockets 2141 arranged in the transverse direction of the air distribution plate 1. Each ring chain 212 extends in the longitudinal direction of the air distribution plate 1, and passes through a driving sprocket 2133 and a driven sprocket 2141 in turn to run in a ring shape. The driving sprocket 2133 and the driven sprocket 2141 are respectively arranged at both ends of the longitudinal direction of the air distribution plate 1. The two driving sprockets 2133 are sleeved on the active transmission shaft 2134, and the active transmission shaft 2134 is supported by bearings at both ends. The two driven sprockets 2141 are sleeved on the driven transmission shaft 2142. The output shaft of the driver 2131 drives the active transmission shaft 2134 to rotate through the transmission device, thereby driving the two driving sprockets 2133 to rotate, and the driving sprocket 2133 drives the ring chain 212 to run, and the ring chain 212 drives the driven sprocket 2141 to rotate through the chain transmission. Meanwhile, the scraper 211 on the endless chain 212 begins to scrape and convey the material. The two ends of the driven transmission shaft 2142 are provided with a tensioning device 2143, so that the endless chain 212 is tensioned by adjusting the driven sprocket wheel 2141.

[0047] In some exemplary embodiments, Figure 1 and Figure 4 As shown, along the moving direction of the scraper 211 on the air distribution plate 1, the first driving device 213 is arranged at the downstream end of the air distribution plate 1, and the driven device 214 is arranged at the upstream end of the air distribution plate 1. Figure 1 The ring chain 212 is shown to run in a counterclockwise direction. Figure 1 The driven device 214 is arranged on the right side of the scraper 21 (the head of the scraper 21). Figure 1 The left side of the scraper 21 (the tail of the scraper 21). The scraper 211 moves from left to right on the air distribution plate 1, and the material is transported from the tail of the scraper 21 to the head of the machine by the scraper 211, and then enters the collection box 22 at the head of the machine.

[0048] In some exemplary embodiments, Figures 5 to 9 As shown, the slag discharge valve 23 includes a second drive device 231, a valve seat 232 and a valve core 233. The second drive device 231 is connected to the valve seat 232. The second drive device 231 provides power for the movement of the valve seat 232. The second drive device 231 can be electric, pneumatic, hydraulically driven, etc. The valve seat 232 is arranged on the side of the slag discharge port 222 where the slag blocks are discharged. The valve seat 232 can open or close the slag discharge port 222 under the drive of the second drive device 231. Figure 5 As shown, the valve seat 232 can move in a vertical direction to open or close the slag discharge port 222 through the first side 2321 of the valve seat 232. A fixing plate 2392 can be connected to the upright side wall 225 of the collection box. The fixing plate 2392 can be fixed to one side of the upright side wall 225 by a fastener 2393 (e.g., a countersunk bolt). The fixing plate 2392 can be a smooth steel plate with relatively high processing accuracy. The first side 2321 of the valve seat 232 fits tightly with the fixing plate 2392 and moves back and forth along the fixing plate 2392. The fixing plate 2392 has a high surface finish, which can reduce the friction when the valve seat 232 moves, and maintains good sealing performance with the valve seat 232. It should be understood that the valve seat 232 can also move in other directions, or the valve seat 232 can also open or close the slag discharge port 222 by rotating. The valve core 233 is disposed on the second side 2322 of the valve seat 232 away from the slag discharge port 222 and is pressed against the valve seat 232. When the slag block needs to be discharged, the second driving device 231 is started to drive the valve seat 232 to move away from the slag discharge port 222 ( Figure 5 The slag block deposited at the bottom of the collecting box 22 is automatically discharged through the slag discharge port 222. After the slag discharge is completed, the second driving device 231 drives the valve seat 232 to move in the reverse direction ( Figure 5 The valve seat 232 closes the slag discharge port 222. In this process, the first side 2331 of the valve core 233 always presses against the second side 2322 of the valve seat 232. When the valve seat 232 closes the slag discharge port 222, the pressing force of the valve core 233 on the valve seat 232 under the action of the elastic member 235 provides a force to lock the valve seat 232, so that the slag discharge port 222 is more firmly closed and maintains good sealing. When the valve seat 232 is opened, the pressing force of the valve core 233 on the valve seat 232 under the action of the elastic member 235 keeps the first side 2331 of the valve core 233 and the second side of the valve seat 232 in contact. The slag discharge valve 23 adopts this two-flap structure including the valve seat 232 and the valve core 233, which has a simple structure, convenient operation and high slag discharge efficiency.

[0049] In some exemplary embodiments, Figure 5As shown, the surfaces of the valve seat 232 and the valve core 233 that cooperate with each other are both configured as wedge-shaped surfaces. The second side 2322 of the valve seat 232 and the first side 2331 of the valve core 233 cooperate with each other and are respectively configured as wedge-shaped surfaces. The second driving device 231 is configured to drive the valve seat 232 to move in a first direction parallel to the plane where the slag discharge port 222 is located, so as to close or open the slag discharge port 222. The valve core 233 is configured to move in a second direction perpendicular to the first direction under the extrusion of the valve seat 232. Figure 5 As shown, when the valve seat 232 moves downward toward the slag discharge port 222 to close the slag discharge port 222, the design of the wedge-shaped surface enables the valve core 233 to move horizontally to the right under the pressure of the valve seat 232. On the contrary, when the valve seat 232 moves upward away from the slag discharge port 222 to open the slag discharge port 222, the design of the wedge-shaped surface enables the valve core 233 to move horizontally to the left. The wedge-shaped surface between the valve seat 232 and the valve core 233 can fit tightly to ensure sealing performance and avoid the phenomenon of the slag discharge valve 23 being stuck due to friction.

[0050] In some exemplary embodiments, Figures 5 and 6 As shown, the slag discharge valve 23 further includes a pressure rod 234 and an elastic member 235. The pressure rod 234 is located on a side of the valve core 233 away from the valve seat 232. The pressure rod 234 cooperates with the elastic member 235 and is configured to drive the valve core 233 to press against the valve seat 232 under the elastic force of the elastic member 235. The pressure rod 234 can be connected (for example, welded) to the second side 2322 of the valve core 233, and the pressure rod 234 and the valve core 233 are pushed together under the elastic force of the elastic member 235 so that the valve core 233 presses against the valve seat 232. When the valve seat 232 moves up and down in the vertical direction, the pressure rod 234 and the valve core 233 can move left and right in the horizontal direction under the elastic force of the elastic member 235 to adapt to the position change of the valve seat 232. The function of the elastic member 235 is to provide elastic restoring force to ensure that the valve core 233 can always press against the valve seat 232 through the pressure rod 234, so as to maintain a close fit and reliable seal between the valve core 233 and the valve seat 232. In addition, by adjusting the elastic deformation of the elastic member 235, the size of the elastic force can be adjusted, thereby adjusting the pressing force of the valve core against the valve seat.

[0051] In some exemplary embodiments, Figures 5 and 6 As shown, the elastic member 235 includes a spring, and the slag discharge valve 23 also includes a pressure block 236 and a spring cover 237. The pressure block 236 and the spring are located in the spring cover 237. The pressure rod 234 passes through both ends of the spring cover 237 and is supported by the spring cover 237. The pressure block 236 is fixedly connected to the pressure rod 234 (for example, threaded connection). The spring is sleeved on the pressure rod 234, one end of the spring abuts against the pressure block 236, and the other end of the spring abuts against the spring cover 237. The spring is in compression deformation, and the spring pushes the pressure block 236, thereby also pushing the pressure rod 234.

[0052] In some exemplary embodiments, Figures 5 and 6 As shown, the slag discharge valve 23 further includes two nuts 238, and the two nuts 238 are located in the spring cover 237. The two nuts 238 are threadedly connected to the pressure rod 234 at intervals, and one nut 238 abuts against the end of the pressure block 236 away from the spring, and the other nut 238 abuts against the end of the spring cover 237 away from the spring. By adjusting the positions of the two nuts 238 and the position of the pressure block 236, the elastic deformation of the spring can be adjusted, and then the elastic force of the spring can be adjusted.

[0053] In some exemplary embodiments, Figures 5 to 8 As shown, the slag discharge valve 23 further includes a valve housing 239. The valve housing 239 is the housing of the slag discharge valve 23, and is used to accommodate or support the second drive device 231, the valve seat 232 and the valve core 233. One end of the valve housing 239 (for example, the fixing plate 2392) is connected to the slag discharge port 222 and is provided with a through hole 2391 corresponding to the slag discharge port 222. The slag enters the inner cavity of the valve housing 239 through the slag discharge port 222 and the through hole 2391, and is discharged from the discharge port 226 below the valve housing 239. The other end of the valve housing 239 is connected to the spring cover 237, and the spring cover 237 is fixed to the valve housing 239. The valve seat 232 and the valve core 233 are arranged in the valve housing 239, and the second drive device 231 is fixed to the outside of the valve housing 239. Figure 5 FIG. 2 shows that the second driving device 231 is fixed to the upper part of the valve box 239 . The pressing rod 234 extends into the valve box 239 to abut against the second side 2332 of the valve core 233 .

[0054] In some exemplary embodiments, Figure 5 As shown, the second driving device 231 is a cylinder, including a cylinder body 2311 and a piston rod 2312. The cylinder body 2311 is fixed above the valve box body 239 and extends in the vertical direction. The piston rod 2312 passes through the upper part of the valve box body 239 and is fixedly connected to the upper part of the valve seat 232 to drive the valve seat 232 to reciprocate.

[0055] In some exemplary embodiments, Figure 1 As shown, the calciner further includes an emergency discharge valve 4. The emergency discharge valve 4 can be provided at the slag discharge port 222, and is configured to open or close the slag discharge port 222. In addition to being adapted to the slag discharge valve 23, the slag discharge port 222 can also be adapted to the emergency discharge valve 4. The emergency discharge valve 4 can refer to the description in the patent application with application publication number CN 111018380 A and title “A gypsum powder discharge device and calciner”, which will not be described in detail here.

[0056] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", "'mouth'-shaped structure" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 'this' invention and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be defined by the attached claims.

Claims

1. A calcining machine, characterized in that: include: Wind distribution board; The unloading device includes a scraper and a collecting box, wherein the scraper includes a scraper, which is arranged on the air distribution plate and configured to scrape away materials deposited on the air distribution plate. The scraper is arranged to move along a set direction on the air distribution plate. The collecting box is located downstream of the scraper along the moving direction of the scraper on the air distribution plate, and is configured to collect the materials scraped away by the scraper and separate the slag in the materials.

2. The calciner according to claim 1, characterized in that The collecting box is provided with an air blast port and a slag discharge port. The air blast port is arranged to be connected to an air blast device to blow air into the collecting box so that the slag blocks are separated from the materials and fall to the bottom of the collecting box; the slag discharge port is arranged at the bottom of the collecting box and is arranged to discharge the slag blocks.

3. The calciner according to claim 2, characterized in that: The collecting box comprises a side wall arranged obliquely, and the air blowing port is arranged on the side wall of the collecting box; There are multiple blast holes, and the multiple blast holes are arranged at intervals along the circumference of the collecting box.

4. The calciner according to claim 2, characterized in that: The unloading device also includes a slag discharge valve, which is arranged at the slag discharge port and is configured to open or close the slag discharge port.

5. The calciner according to any one of claims 1 to 4, characterized in that The scraper also includes an endless chain, a first driving device and a driven device. The scraper is fixed to the endless chain. The first driving device is connected to the endless chain and is configured to drive the endless chain to circulate. The first driving device includes a driver, a transmission device connected to the driver and a driving sprocket connected to the transmission device. The driven device includes a driven sprocket. The endless chain is sleeved on the driving sprocket and the driven sprocket.

6. The calciner according to claim 5, characterized in that Along the moving direction of the scraper on the air distribution plate, the first driving device is arranged at the downstream end of the air distribution plate, and the driven device is arranged at the upstream end of the air distribution plate.

7. The calciner according to claim 4, characterized in that The slag discharge valve includes a second driving device, a valve seat and a valve core. The second driving device is connected to the valve seat. The valve seat is arranged on the discharge side of the slag discharge port located outside the collecting box, and can open or close the slag discharge port under the drive of the second driving device. The valve core is arranged on the other side of the valve seat away from the slag discharge port and is pressed against the valve seat.

8. The calciner according to claim 7, characterized in that The mating surfaces of the valve seat and the valve core are both configured as wedge-shaped surfaces, the second driving device is configured to drive the valve seat to move in a first direction parallel to the plane where the slag discharge port is located to close or open the slag discharge port, and the valve core is configured to move in a second direction perpendicular to the first direction under the extrusion action of the valve seat.

9. The calciner according to claim 8, characterized in that The slag discharge valve also includes a pressure rod and an elastic member, the pressure rod presses against the end of the valve core away from the valve seat and / or the pressure rod is connected to the end of the valve core away from the valve seat, the pressure rod cooperates with the elastic member, and is configured to drive the valve core to press against the valve seat under the elastic force of the elastic member.

10. The calciner according to claim 9, characterized in that The elastic member includes a spring, and the slag discharge valve also includes a pressure block and a spring cover. The pressure block and the spring are located in the spring cover, and the pressure rod passes through the spring cover. The pressure block is fixedly connected to the pressure rod, and the spring is sleeved on the pressure rod. One end of the spring abuts against the pressure block, and the other end of the spring abuts against the spring cover.

11. The calciner according to claim 10, characterized in that The slag discharge valve also includes two nuts, which are located in the spring cover and threadedly connected to the pressure rod at intervals, and one nut abuts against one end of the pressure block away from the spring, and the other nut abuts against one end of the spring cover away from the spring.

12. The calciner according to claim 10, characterized in that The slag discharge valve also includes a valve box body, one end of the valve box body is connected to the slag discharge port and is provided with a through hole corresponding to the slag discharge port, the other end of the valve box body is connected to the spring cover, the valve seat and the valve core are arranged in the valve box body, the second driving device is fixed to the outside of the valve box body, and the pressure rod extends into the valve box body.

13. The calciner according to claim 12, characterized in that The second driving device is a cylinder including a cylinder body and a piston rod. The cylinder body is fixed to the valve box body. The piston rod passes through the valve box body and is fixedly connected to the valve seat to drive the valve seat to move.

14. The calciner according to claim 2, characterized in that It also includes an emergency discharge valve, which is arranged at the slag discharge port and is configured to open or close the slag discharge port.

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