Quartz sand drying and screening production device for fracturing

Abstract

The invention relates to the technical field of quartz sand drying, and discloses a quartz sand drying and screening production device for fracturing, which comprises a fixed shell, a primary screening plate, a discharging frame, a sliding baffle plate, a drying box and the like, a primary screening plate is installed at the top of the fixed shell and conducts primary screening on mined crude sand, a discharging frame is fixedly connected to the bottom of the fixed shell, screened and dried quartz sand falls out from the discharging frame, and a sliding baffle is slidably connected into the fixed shell. According to the device, quartz sand blocks are screened according to the water content of the quartz sand blocks after being subjected to coarse screening, the water-containing quartz sand blocks can enter the drying box, the dried quartz sand blocks can directly fall down from the outside of the drying box, and in the drying process, due to the fact that the water content in the quartz sand blocks is different, the drying efficiency is improved. And the dried quartz sand can directly fall down from a gap in the side edge of the drying box, so that the situation that the performance is affected due to quartz sand deformation or surface cracking caused by too long drying time is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quartz sand drying, and particularly relates to a quartz sand drying and screening production device for fracturing. BACKGROUND

[0002] Quartz sand is an important industrial mineral raw material, which can be widely applied to glass, casting, ceramics, chemical industry, electronics, water treatment and other fields after drying and screening treatment. The existing drying system usually adopts a whole heating mode, and it is difficult to implement differentiated drying strategies for quartz sand with different initial moisture contents. Quartz sand with low moisture content is prone to crystal type transformation or surface micro-cracks after long-time high-temperature drying, which reduces the strength of the quartz sand and affects its performance. In addition, the fine powder on the surface of the quartz sand is scattered under the action of hot air during the drying process, polluting the working environment, and the high dust concentration may also cause an explosion risk.

[0003] In order to solve the above problems, the present application can discharge the quartz sand that has been dried in advance during the drying process, and can absorb and centrally discharge the dust in the drying box during the drying process, thereby solving the technical problems that the existing technology is prone to crystal type transformation or micro-cracks of quartz sand with low moisture content during the drying process, which affects the performance of the quartz sand, and the fine powder is scattered during the drying process, polluting the environment and even causing an explosion risk. SUMMARY

[0004] The present application provides a quartz sand drying and screening production device for fracturing to solve the technical problems that the existing technology is prone to crystal type transformation or micro-cracks of quartz sand with low moisture content during the drying process, which affects the performance of the quartz sand, and the fine powder is scattered during the drying process, polluting the environment and even causing an explosion risk.

[0005] A quartz sand drying and screening production device for fracturing includes a fixed shell, an initial screening plate, a discharge frame, a sliding baffle, a drying box, a screening mechanism and a drying mechanism. The initial screening plate is installed on the top of the fixed shell. The discharge frame is fixedly connected to the bottom of the fixed shell. The sliding baffle is slidably connected in the fixed shell. The drying box is fixedly connected in the fixed shell and located between the two sliding baffles. The screening mechanism is installed in the fixed shell and can screen the quartz sand that has been initially screened according to its moisture content. The drying mechanism is installed in the drying box and used for drying the screened quartz sand.

[0006] Preferably, the screening mechanism includes a fixed inclined plate, a V-shaped partition plate and a scraping assembly. The fixed inclined plate and the V-shaped partition plate are fixedly connected in the fixed shell. The fixed inclined plate is located on the top of the V-shaped partition plate. The scraping assembly is installed in the fixed shell and used for scraping the quartz sand adhered to the V-shaped partition plate.

[0007] Preferably, the scraping assembly comprises a control motor, a rotating cam, a lifting block, a sliding scraper, a swing push rod, a return spring and a sliding connecting rod, the control motor is installed in the fixed shell, the rotating cam is rotatably connected in the fixed shell, the output shaft of the control motor is connected with the rotating cam, the sliding scraper is slidably connected on the V-shaped partition plate, the sliding connecting rod is slidably connected on the sliding scraper, the sliding connecting rod and the sliding scraper are connected through the return spring, the lifting block is fixedly connected on the sliding connecting rod, the lifting block is in contact with the rotating cam, the swing push rod is rotatably connected on the lifting block, and the other end of the swing push rod is rotatably connected on the sliding baffle.

[0008] Preferably, the drying mechanism comprises a guide inclined plate, a sliding rack, a straight gear, a rotating lead screw, a moving scraper and a dry material discharging assembly, the guide inclined plate is fixedly connected in the drying box, the sliding rack is slidably connected in the drying box, the sliding rack is fixedly connected with the sliding baffle, the rotating lead screw is rotatably connected in the guide inclined plate, the straight gear is fixedly connected on one end of the rotating lead screw close to the sliding rack, the straight gear is engaged with the sliding rack, the moving scraper is slidably connected on the guide inclined plate, the moving scraper is threadedly connected with the rotating lead screw, and the dry material discharging assembly is installed in the drying box.

[0009] Preferably, the drying mechanism further comprises a fixed partition plate, and the fixed partition plate is fixedly connected in the drying box and cooperates with the guide inclined plate to separate the two sides of the drying box by a certain gap.

[0010] Preferably, the dry material discharging assembly comprises a fixed guide groove, a sliding seat, a connecting push rod and a lifting baffle, the fixed guide groove is fixedly connected on the guide inclined plate, the lifting baffle is slidably connected on the bottom of the guide inclined plate, the sliding seat is slidably connected in the fixed guide groove, the connecting push rod is rotatably connected on the sliding seat, and the other end of the connecting push rod is rotatably connected on the lifting baffle.

[0011] Preferably, the screening mechanism for screening the dried quartz sand is further comprised, and the screening mechanism comprises a fine sieve plate, a fixed lug plate and a wave plate, the fine sieve plate is slidably connected on the bottom of the fixed shell, the fixed lug plate is fixedly connected on the fine sieve plate, the wave plate is fixedly connected on the bottom of the sliding baffle, the wave plate is connected with the fixed lug plate, and the sliding baffle can slide the fixed lug plate and the fine sieve plate up and down through the wave plate in the process of sliding.

[0012] Preferably, a dust removal mechanism for removing dust in the drying box is further included, which comprises a dust suction cylinder, a sliding piston rod, a return spring and a dust outlet pipe, the dust suction cylinder is fixedly connected in the fixed shell and communicates with the drying box, a one-way air valve is installed at one end of the dust suction cylinder communicating with the drying box, the sliding piston rod is slidably connected in the dust suction cylinder, the sliding piston rod is U-shaped and slidably connected with the fixed shell, the other end of the sliding piston rod is in contact with the sliding baffle, the sliding piston rod and the fixed shell are connected through the return spring, and the dust outlet pipe is installed at the bottom of the dust suction cylinder and communicates with the dust suction cylinder, and a one-way air valve is also installed in the dust outlet pipe.

[0013] Preferably, the bottom of the drying box is not closed, the internal temperature of the drying box can extend downward to improve the temperature at the top of the fine sieve plate, and the temperature on the fine sieve plate is lower than that in the drying box, which can avoid surface cracking of the quartz sand.

[0014] The beneficial effects are: 1. After the quartz sand block is coarsely screened, it is screened according to the water content of the quartz sand block, the quartz sand block containing water enters the drying box, and the dry quartz sand block directly falls downward from outside the drying box, so as to avoid repeated drying of the dry quartz sand, which causes the quartz sand to denature or surface cracking.

[0015] 2. During the drying process, due to different water contents in the quartz sand block, the quartz sand block with less water content has a shorter drying time, and when the moving scraper moves along the surface of the guide chute to the lowest position, it can drive the lifting baffle to rise, so that the dry quartz sand block can enter the gap between the two layers of guide chutes from the side of the drying box, and then directly falls downward from the drying box, so as to avoid long drying time causing the quartz sand to denature or surface cracking and affecting the performance.

[0016] 3. After the quartz sand falls on the guide chute, it will slide and scatter downward, and the quartz sand in the drying box will pass through multiple guide chutes, which will scatter the quartz sand accumulated each time, so as to effectively avoid the situation of insufficient drying caused by the accumulation of quartz sand.

[0017] 4. During the drying process, the quartz sand rolling on the surface of the guide chute will generate a large amount of dust, and the sliding baffle reciprocally sliding can suck the dust in the drying box into the dust suction cylinder through the sliding piston rod, and then discharge the dust in the dust suction cylinder from the dust outlet pipe, realizing the function of dust removal during the drying process.

[0018] 5. During the sliding process of the quartz sand block along the V-shaped partition plate and the guide chute, part of the quartz sand may adhere to the V-shaped partition plate and the guide chute, and the sliding scraper and the moving scraper slide along the surface of the V-shaped partition plate and the guide chute to scrape off the quartz sand adhered to the surface of the V-shaped partition plate and the guide chute.

[0019] 6. When the water content of the quartz sand block is too high, the quartz sand block still contains a small amount of water after falling out of the drying box. The bottom of the drying box is not closed, and some heat will spread downward to the fine sieve plate to continue drying the incompletely dried quartz sand block. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention as a whole.

[0021] Figure 2 It is a schematic diagram of the structure inside the fixed shell of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the relative positions of the V-shaped partition and the sliding baffle of the present invention.

[0023] Figure 4 This is a schematic structural diagram of the fine screen plate at the top of the discharge frame of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the inner side of the V-shaped partition of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the return spring in the cross section of the sliding scraper of the present invention.

[0026] Figure 7 It is a structural schematic diagram of the interior of the drying box of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the material guide inclined plate of the present invention.

[0028] In the accompanying drawings: 1, fixed shell, 101, primary screen plate, 102, discharge frame, 103, fixed inclined plate, 104, V-shaped partition, 1041, control motor, 1042, rotating cam, 1043, lifting block, 1044, sliding scraper, 1045, swing push rod, 1046, return spring, 1047, sliding connecting rod, 105, sliding baffle, 106, fine screen plate, 1061, fixed Fixed convex plate, 107, corrugated plate, 2, drying box, 201, fixed partition, 202, guide ramp, 203, sliding rack, 204, spur gear, 205, rotating screw, 206, moving scraper, 207, fixed guide groove, 208, sliding seat, 209, connecting push rod, 210, lifting baffle, 3, dust collector, 301, sliding piston rod, 302, return spring, 303, dust outlet pipe. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1: A device for drying and screening quartz sand for fracturing, such as Figures 1-8As shown, it includes a fixed shell 1, a primary screen plate 101, a discharge frame 102, a sliding baffle 105, a drying box 2, a screening mechanism and a drying mechanism. The primary screen plate 101 is installed on the top of the fixed shell 1, and the primary screen plate 101 performs preliminary screening on the mined raw sand. The discharge frame 102 is fixedly connected to the bottom of the fixed shell 1, and the quartz sand after screening and drying falls downward from the discharge frame 102. The sliding baffle 105 is slidingly connected in the fixed shell 1, and the drying box 2 is fixed in the fixed shell 1. The drying box 2 is located between the two sliding baffles 105. The screening mechanism is installed in the fixed shell 1, and the screening mechanism can screen the quartz sand that has been preliminarily screened according to its water content. The drying mechanism is installed in the drying box 2, and the drying mechanism is used to dry the screened quartz sand.

[0031] After the quartz sand is mined and inspected, the qualified quartz sand is poured into the fixed shell 1, and the primary screen plate 101 on the top of the fixed shell 1 performs preliminary screening on it. The quartz sand screened by the primary screen plate 101 falls down into the screening mechanism. The screening mechanism can cooperate with the sliding baffle 105 and screen the quartz sand according to whether it is dry or not. The dry quartz sand can fall directly downward, and the wet quartz sand will fall into the drying mechanism for drying. The dried quartz sand finally falls down through the discharge frame 102.

[0032] Example 2: Based on Example 1, Figures 2-6 As shown, the screening mechanism includes a fixed inclined plate 103, a V-shaped partition 104 and a scraping assembly. The fixed inclined plate 103 and the V-shaped partition 104 are fixedly connected in the fixed shell 1. The fixed inclined plate 103 is located on the top of the V-shaped partition 104. The V-shaped partition 104 is set upside down. The quartz sand that has been preliminarily screened is dispersed to both sides under the action of the V-shaped partition 104. The scraping assembly is installed in the fixed shell 1, and the scraping assembly is used to scrape off the quartz sand adhering to the V-shaped partition 104.

[0033] like Figures 4-6 As shown, the scraping assembly includes a control motor 1041, a rotating cam 1042, a lifting block 1043, a sliding scraper 1044, a swing push rod 1045, a return spring 1046 and a sliding connecting rod 1047. The control motor 1041 is installed in the fixed shell 1, and the rotating cam 1042 is rotatably connected in the fixed shell 1. The output shaft of the control motor 1041 is connected to the rotating cam 1042. The control motor 1041 can drive the rotating cam 1042 to rotate. Two sliding scrapers 1044 are symmetrically connected to the V-shaped partition 104 in a sliding manner. The sliding scrapers 1044 can slide on the V-shaped partition 104 in an inclined direction to scrape off the quartz sand adhered to the surface of the V-shaped partition 104. Figure 6As can be seen, two long strip-shaped through hole structures are symmetrically arranged on the V-shaped partition plate 104, the through hole structures extend in the sliding direction of the sliding scrapers 1044, each through hole structure corresponds to a sliding scraper 1044, and one end of the two sliding scrapers 1044 adjacent to each other penetrates through the corresponding through hole and extends into the inside of the V-shaped partition plate 104. It can be understood that the main body shape of the sliding scraper 1044 is T-shaped, and the end of the two sliding scrapers 1044 adjacent to each other is provided with a blind hole, a sliding connecting rod 1047 is slidably connected in the blind hole, one end of the sliding connecting rod 1047 is located inside the blind hole, the other end of the sliding connecting rod 1047 extends out of the blind hole, a return spring 1046 is sleeved on the sliding connecting rod 1047, the return spring 1046 is located in the blind hole, and the end of the sliding connecting rod 1047 located in the blind hole is provided with an annular flange structure, the flange structure is used to prevent the return spring 1046 from being separated from the sliding connecting rod 1047, and the end of the blind hole is also provided with an annular flange structure, the end of the blind hole refers to the end of the two sliding scrapers 1044 adjacent to each other, the hole diameter of the annular flange structure at the end of the blind hole is smaller than the hole diameter of the blind hole itself, but the hole diameter of the annular flange structure at the end of the blind hole is the same as the diameter of the main body of the sliding connecting rod 1047, so that the sliding connecting rod 1047 can be slidably connected with the sliding scraper 1044 and axially moved in the blind hole, the annular flange structure at the end of the blind hole is used to prevent the return spring 1046 from exiting from the blind hole, that is, the return spring 1046 is located between the flange structure at the inner end of the sliding connecting rod 1047 and the flange structure at the end of the blind hole, so that when the sliding connecting rod 1047 slides out of the blind hole, the sliding connecting rod 1047 can compress the return spring 1046 through the annular flange structure itself, one end of the sliding connecting rod 1047 located outside the blind hole is fixedly connected with a lifting block 1043, the lifting block 1043 is in contact with the rotating cam 1042, and the lifting block 1043 is rotatably connected with an oscillating push rod 1045, and the other end of the oscillating push rod 1045 is rotatably connected to the sliding baffle 105.

[0034] The quartz sand screened by the primary screening plate 101 falls downward and contacts the fixed inclined plate 103, and then slides along the top surface of the fixed inclined plate 103 to the V-shaped partition plate 104, and the quartz sand is dispersed to both sides on the surface of the V-shaped partition plate 104, the dry quartz sand slides downward along the V-shaped partition plate 104 at a relatively fast speed, so that the dry quartz sand directly flies out from the top of the sliding baffle 105 and falls downward along the fixed housing 1, the wet quartz sand slowly slides along the surface of the V-shaped partition plate 104 due to the influence of the internal moisture, so that the wet quartz sand can fall into the drying box 2 for drying processing, and part of the quartz sand can be adhered to the surface of the V-shaped partition plate 104, the control motor 1041 is started at the same time in the drying process, the control motor 1041 drives the rotating cam 1042 to rotate, the lifting block 1043 is driven to rotate around the rotating cam 1042, and the oscillating push rod 1045 is driven to oscillate, so that the sliding baffle 105 is driven to oscillate, and the quartz sand adhered to the surface of the V-shaped partition plate 104 is shaken off, so that the quartz sand can fall into the drying box 2 for drying processing. Figure 6As can be seen from the drawings, the lower end of the lifting block 1043 has a straight rod extending towards the rotating cam 1042, the rotating cam 1042 can push the lifting block 1043 to descend through the straight rod at the lower end of the lifting block 1043 when the rotating cam 1042 rotates, the rotating cam 1042 can push the lifting block 1043 to descend when the rotating cam 1042 rotates, the sliding connecting rod 1047 pulls the sliding scraper 1044 to slide downwards along the V-shaped partition plate 104 when the lifting block 1043 descends, so as to scrape off the quartz sand adhered to the surface of the V-shaped partition plate 104, so that the quartz sand on the V-shaped partition plate 104 slides downwards, and the two sliding baffles 105 can be pushed away from each other by the swinging push rod 1045 during the descending process of the lifting block 1043, the lifting block 1043 will descend when the sliding connecting rod 1047 descends, and because the sliding connecting rod 1047 is connected with the sliding scraper 1044, the sliding scraper 1044 needs to descend synchronously when the sliding connecting rod 1047 descends, however, the sliding scraper 1044 needs to descend along the slope at the top of the V-shaped partition plate 104 and gradually horizontally away from the lifting block 1043 when the sliding scraper 1044 descends, so the sliding scraper 1044 will slide along the sliding connecting rod 1047 and compress the return spring 1046 during the descending process of the sliding scraper 1044, when the rotating cam 1042 rotates and pushes the lifting block 1043 to descend to the lowest position, the rotating cam 1042 continues to rotate and will lose the downward thrust of the lifting block 1043, under the action of the return spring 1046, the sliding scraper 1044 will slide upwards along the V-shaped partition plate 104 to reset, and at the same time, the lifting block 1043 and the sliding connecting rod 1047 will also rise to reset.

[0035] As Figure 4 , Figure 7 and Figure 8 shown, the drying mechanism includes a guide inclined plate 202, a sliding rack 203, a straight gear 204, a rotating lead screw 205, a moving scraper 206 and a dry material discharge assembly, the guide inclined plate 202 is fixedly connected in the drying box 2, the quartz sand after preliminary screening will fall on the guide inclined plate 202 and slide downwards, the sliding rack 203 is slidingly connected in the drying box 2, the sliding rack 203 is fixedly connected with the sliding baffle 105, from Figure 7 can be seen, a rectangular through hole is formed on the outer wall of the drying box 2 corresponding to the position of the sliding rack 203, one side of the drying box 2 where the rectangular through hole is formed corresponds to the sliding baffle 105, the sliding rack 203 is fixedly connected with the sliding baffle 105 after penetrating through the rectangular through hole on the outer wall of the drying box 2, the rotating lead screw 205 is rotatably connected in the guide inclined plate 202, the straight gear 204 is fixedly connected to one end of the rotating lead screw 205 close to the sliding rack 203, the straight gear 204 is engaged with the sliding rack 203, the moving scraper 206 is slidingly connected on the guide inclined plate 202, the moving scraper 206 is threadedly connected with the rotating lead screw 205, the dry material discharge assembly is installed in the drying box 2, the dry material discharge assembly can directly discharge the quartz sand dried in the drying box 2 downwards.

[0036] The quartz sand entering the drying box 2 will fall on the guide chute 202, and the quartz sand will slide downward along the guide chute 202. The drying box 2 heats the air inside to dry the quartz sand. When the lifting block 1043 descends and pushes the two sliding baffles 105 away from each other through the swing push rod 1045, the sliding rack 203 moves and drives the spur gear 204 to rotate. When the spur gear 204 rotates, it can drive the rotating lead screw 205 to rotate. In the process of rotating the rotating lead screw 205, the moving scraper 206 can slide downward along the guide chute 202. The moving scraper 206 can push the quartz sand on the surface of the guide chute 202 to move, so as to avoid the quartz sand adhering to the guide chute 202. When the two sliding baffles 105 approach each other, the sliding rack 203 moves and drives the spur gear 204 to rotate in the opposite direction. The spur gear 204 drives the rotating lead screw 205 to rotate in the opposite direction, thereby driving the sliding scraper 1044 to slide in the opposite direction along the guide chute 202. The sliding baffle 105 drives the sliding scraper 1044 to reciprocate along the guide chute 202 in the process of reciprocating sliding.

[0037] As shown in Figure 7 , the drying mechanism further comprises a fixed partition plate 201, and the fixed partition plate 201 is fixedly connected in the drying box 2. The fixed partition plate 201 is inclinedly arranged in the drying box 2, and cooperates with the guide chute 202 to separate the two sides of the drying box 2 by a certain gap.

[0038] As shown in Figure 8 , the dry material discharging assembly comprises a fixed guide groove 207, a sliding seat 208, a connecting push rod 209 and a lifting baffle 210. The fixed guide groove 207 is fixedly connected on the guide chute 202. The lifting baffle 210 is slidingly connected to the bottom of the guide chute 202 in the vertical direction. The sliding seat 208 is slidingly connected in the fixed guide groove 207. The connecting push rod 209 is rotatably connected to the sliding seat 208. The other end of the connecting push rod 209 is rotatably connected to the lifting baffle 210. The height of the end of the connecting push rod 209 connected to the lifting baffle 210 is higher than the height of the corresponding sliding seat 208, that is, the connecting push rod 209 is inclinedly arranged when connecting the lifting baffle 210 and the sliding seat 208, so as to Figure 8 , for example, Figure 8 , the height of the left side of the connecting push rod 209 in the figure is higher than that of the right side.

[0039] The guide chute 202 has a gap with the side wall of the drying box 2, and the fixed partition plate 201 can prevent the quartz sand from directly passing through the gap on the side of the drying box 2 and falling downward. In the static state, the lifting baffle 210 on the side of the plurality of guide chutes 202 is located at the lowest position, and the lifting baffle 210 separates the guide chute 202 from the gap on the side of the drying box 2. During the drying process, part of the quartz sand with low water content is dried in advance. During the sliding process of the quartz sand along the guide chute 202 and the moving scraper 206, the moving scraper 206 continuously slides toward the lifting baffle 210, and the quartz sand with low water content is separated from the quartz sand with high water content. The quartz sand with low water content is separated from the quartz sand with high water content. Figure 8 As can be seen from the drawings, the middle position of the moving scraper 206 is U-shaped, and the circular rods are extended outward on both sides of the sliding seat 208. When the moving scraper 206 moves to the sliding seat 208, the U-shaped part in the middle position of the moving scraper 206 contacts the circular rods extended outward on the sliding seat 208, and the moving scraper 206 continues to move to push the sliding seat 208 to slide along the fixed guide groove 207 toward the lifting baffle 210. Since the connecting push rod 209 is in an inclined state, the sliding seat 208 will apply a horizontal and vertically upward force to the lifting baffle 210 through the connecting push rod 209, but since the lifting baffle 210 is connected to the bottom of the guide chute 202 in a vertical direction, the lifting baffle 210 will not move horizontally. Therefore, the sliding seat 208 will push the lifting baffle 210 to slide upward through the connecting push rod 209, so that the guide chute 202 is connected to the gap on the side of the drying box 2. At this time, the quartz sand that has been dried completely slides fast enough and falls directly into the gap on the side of the drying box 2 and falls downward. The sliding speed of the quartz sand that has not been dried completely is slow, and the quartz sand that has not been dried completely will continue to fall on the next layer of the guide chute 202 and continue to be dried.

[0040] Example 3: based on example 2, as shown in Figure 4 The screening mechanism includes a fine sieve plate 106, a fixed convex plate 1061, and a wave plate 107. The fine sieve plate 106 is slidably connected to the inner bottom of the fixed shell 1, the fixed convex plate 1061 is fixedly connected to the fine sieve plate 106, and the wave plate 107 is fixedly connected to the bottom of the sliding baffle 105. The wave plate 107 is connected to the fixed convex plate 1061, and the sliding baffle 105 can slide up and down by pushing the fixed convex plate 1061 and the fine sieve plate 106 through the wave plate 107 during the sliding process.

[0041] The quartz sand after drying will fall on the fine sieve plate 106, the sliding baffle 105 will drive the wave plate 107 to move during the sliding process in the fixed shell 1, the wave plate 107 will push the fixed convex plate 1061 to slide upward when contacting with the fixed convex plate 1061 during the moving process, and the fine sieve plate 106 will rise accordingly, and the fine sieve plate 106 and the fixed convex plate 1061 will slide downward to reset automatically after the wave plate 107 is out of contact with the fixed convex plate 1061, and the fine sieve plate 106 slides up and down to screen the dried quartz sand; the bottom of the drying box 2 is not closed, the temperature inside the drying box 2 can extend downward to improve the temperature at the top of the fine sieve plate 106, so as to continue to dry the quartz sand that has not been completely dried which falls in the drying box 2, and the temperature on the fine sieve plate 106 is lower than the temperature in the drying box 2, which can avoid the surface cracking of the quartz sand.

[0042] As shown in Figure 1 and Figure 2 , it also includes a dust removal mechanism for removing dust in the drying box 2, the dust removal mechanism includes a dust suction cylinder 3, a sliding piston rod 301, a return spring 302 and a dust outlet pipe 303, the dust suction cylinder 3 is fixedly connected in the fixed shell 1, the dust suction cylinder 3 is communicated with the drying box 2, one end of the dust suction cylinder 3 is provided with a one-way air valve, the gas in the drying box 2 can enter the dust suction cylinder 3 through the one-way air valve, the sliding piston rod 301 is slidably connected in the dust suction cylinder 3, the sliding piston rod 301 is U-shaped and slidably connected with the fixed shell 1, the other end of the sliding piston rod 301 is in contact with the sliding baffle 105, the return spring 302 is connected between the sliding piston rod 301 and the fixed shell 1, one end of the return spring 302 is fixed on the sliding piston rod 301, and the other end is fixed on the fixed shell 1, the dust outlet pipe 303 is installed at the bottom of the dust suction cylinder 3, the dust outlet pipe 303 is communicated with the dust suction cylinder 3, and the dust outlet pipe 303 is also provided with a one-way air valve, and the gas in the dust suction cylinder 3 can enter the dust outlet pipe 303 through the one-way air valve.

[0043] The dust on the surface of the quartz sand will overflow outward during the drying process, the sliding piston rod 301 will slide outward along the fixed shell 1 and the dust suction cylinder 3 and compress the return spring 302 when the two sliding baffles 105 move away from each other, and the dust in the drying box 2 will be sucked into the dust suction cylinder 3 during this process, and the dust-containing gas in the dust suction cylinder 3 will be discharged outward from the dust outlet pipe 303 when the sliding piston rod 301 slides back to the original position under the pushing of the return spring 302 when the sliding baffles 105 move close to each other.

[0044] The above description is only for exemplary purposes and does not mean to limit the present application. Those skilled in the art will understand that the variations of the present application will be included in the scope of the claims herein.

Claims

1. A device for drying and screening quartz sand for fracturing, characterized by: The invention comprises a fixed shell (1), a primary screening plate (101), a discharge frame (102), a sliding baffle (105), a drying box (2), a screening mechanism and a drying mechanism, wherein the primary screening plate (101) is installed on the top of the fixed shell (1), the discharge frame (102) is fixedly connected to the bottom of the fixed shell (1), the sliding baffle (105) is slidably connected in the fixed shell (1), the drying box (2) is fixedly connected in the fixed shell (1), and the drying box (2) is located between the two sliding baffles (105), the screening mechanism is installed in the fixed shell (1), and the screening mechanism can screen the quartz sand that has been preliminarily screened according to its water content, and the drying mechanism is installed in the drying box (2), and the drying mechanism is used to dry the screened quartz sand.

2. The drying and screening production device for quartz sand for fracturing according to claim 1 is characterized by: The screening mechanism comprises a fixed inclined plate (103), a V-shaped partition (104) and a scraping assembly. The fixed inclined plate (103) and the V-shaped partition (104) are fixedly connected in the fixed housing (1). The fixed inclined plate (103) is located on the top of the V-shaped partition (104). The scraping assembly is installed in the fixed housing (1). The scraping assembly is used to scrape off quartz sand adhered to the V-shaped partition (104).

3. The drying and screening production device for quartz sand for fracturing according to claim 2, characterized in that: The scraping assembly comprises a control motor (1041), a rotating cam (1042), a lifting block (1043), a sliding scraper (1044), a swing push rod (1045), a return spring (1046) and a sliding connecting rod (1047). The control motor (1041) is installed in the fixed housing (1), and the rotating cam (1042) is rotatably connected in the fixed housing (1). The output shaft of the control motor (1041) is connected to the rotating cam (1042). The sliding scraper is slidably connected on the V-shaped partition (104). The sliding scraper (1044) is slidably connected to a sliding link (1047), the sliding link (1047) and the sliding scraper (1044) are connected via a return spring (1046), a lifting block (1043) is fixedly connected to the sliding link (1047), the lifting block (1043) contacts the rotating cam (1042), and a swing push rod (1045) is rotatably connected to the lifting block (1043), and the other end of the swing push rod (1045) is rotatably connected to the sliding baffle (105).

4. The drying and screening production device for quartz sand for fracturing according to claim 1 is characterized by: The drying mechanism comprises a material guide inclined plate (202), a sliding rack (203), a spur gear (204), a rotating screw (205), a movable scraper (206) and a dry material discharge assembly. The material guide inclined plate (202) is fixedly connected in the drying box (2). The sliding rack (203) is slidably connected in the drying box (2). The sliding rack (203) is fixedly connected to the sliding baffle (105). The material guide inclined plate (202) is rotatably connected to the rotating screw (205). A spur gear (204) is fixedly connected to one end of the movable screw rod (205) close to the sliding rack (203), and the spur gear (204) is meshed with the sliding rack (203). A movable scraper (206) is slidably connected to the guide inclined plate (202), and the movable scraper (206) is threadedly connected to the rotating screw rod (205). The dry material discharge assembly is installed in the drying box (2), and the dry material discharge assembly can directly discharge the dried quartz sand downward from the drying box (2).

5. The drying and screening production device for quartz sand for fracturing according to claim 4 is characterized by: The drying mechanism further comprises a fixed partition (201), the fixed partition (201) being fixedly connected in the drying box (2), and the fixed partition (201) cooperates with the material guide inclined plate (202) to separate two sides of the drying box (2) into a gap.

6. The device for drying and screening quartz sand for fracturing according to claim 4, characterized in that: The dry material discharge assembly comprises a fixed guide groove (207), a sliding seat (208), a connecting push rod (209) and a lifting baffle (210); the fixed guide groove (207) is fixedly connected to the material guide inclined plate (202); the lifting baffle (210) is slidably connected to the bottom of the material guide inclined plate (202); the sliding seat (208) is slidably connected in the fixed guide groove (207); the connecting push rod (209) is rotatably connected to the sliding seat (208); the other end of the connecting push rod (209) is rotatably connected to the lifting baffle (210).

7. The device for drying and screening quartz sand for fracturing according to claim 1, characterized in that: The invention also includes a screening mechanism for screening the dried quartz sand, the screening mechanism including a fine screen plate (106), a fixed convex plate (1061) and a wave plate (107), the fine screen plate (106) is slidably connected to the bottom of the fixed shell (1), the fixed convex plate (1061) is fixedly connected to the fine screen plate (106), the wave plate (107) is fixedly connected to the bottom of the sliding baffle (105), the wave plate (107) is connected to the fixed convex plate (1061), and the sliding baffle (105) can push the fixed convex plate (1061) and the fine screen plate (106) to slide up and down through the wave plate (107) during the sliding process.

8. The device for drying and screening quartz sand for fracturing according to claim 1, characterized in that: The utility model also includes a dust removal mechanism for sucking dust from the drying box (2), the dust removal mechanism including a dust collection cylinder (3), a sliding piston rod (301), a return spring (302) and a dust outlet pipe (303). The fixed housing (1) is fixed with a dust collection cylinder (3), the dust collection cylinder (3) is communicated with the drying box (2), and a one-way air valve is installed at one end of the dust collection cylinder (3) that is communicated with the drying box (2). The dust collection cylinder (3) is slidably connected with a sliding piston rod (301) in the dust collection cylinder (3), the sliding piston rod (301) is U-shaped and slidably connected to the fixed housing (1), the other end of the sliding piston rod (301) contacts the sliding baffle (105), and the sliding piston rod (301) and the fixed housing (1) are connected via the return spring (302). The dust outlet pipe (303) is installed at the bottom of the dust collection cylinder (3), the dust outlet pipe (303) is communicated with the dust collection cylinder (3), and a one-way air valve is also installed in the dust outlet pipe (303).

9. The device for drying and screening quartz sand for fracturing according to claim 7, characterized in that: The bottom of the drying box (2) is not closed, and the temperature inside the drying box (2) can extend downward to increase the temperature of the top of the fine screen plate (106), and the temperature on the fine screen plate (106) is lower than the temperature inside the drying box (2), which can prevent the quartz sand surface from cracking.

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