Dust recovery device in aminosulfonic acid production system

Abstract

The present invention discloses a dust recovery device in an aminosulfonic acid production system, including a filter box and an exhaust box, wherein a filter cloth is arranged in the filter box, a connecting cylinder is fixedly connected to one end of the filter box, and a fixing column is arranged at the top of the cone of the conical structure of the filter cloth; a push-pull rod is slidably connected to the end of the filter box, one end of the push-pull rod extends into the filter box and is fixedly connected to a support rod, a locking mechanism is arranged on the support rod, and the fixing column is located in the filter box and locked in the locking mechanism; when the push-pull rod is pulled out toward one end of the exhaust box, the locking mechanism is moved into the connecting cylinder and the locking mechanism unlocks the fixing column. When the filter cloth needs to be replaced, the locking mechanism moves toward the exhaust box, so that the fixing column passes through the fixed flange to drive the filter cloth filtering surface to be pocketed in the filter cloth, and the filtering side of the filter cloth can be wrapped in the filter cloth, thereby preventing dust from being raised again when the filter cloth is removed, and facilitating the replacement of the filter cloth.

Description

Technical Field

[0001] The invention relates to the technical field of dust recovery, and in particular to a dust recovery device in a sulfamic acid production system. Background Art

[0002] Aminosulfonic acid is an inorganic solid acid formed by replacing the hydroxyl group of sulfuric acid with an amino group. It is generally white, odorless, rhombic flaky crystals. At room temperature, as long as it is kept dry and not in contact with water, solid aminosulfonic acid does not absorb moisture and is relatively stable. During the production of aminosulfonic acid, the crystals need to be separated and dried, and the dried aminosulfonic acid products are packaged. During the packaging, subpackaging and turnover dumping process, aminosulfonic acid is prone to dust. Aminosulfonic acid dust is irritating to the eyes and skin and can cause burns. Therefore, the spilled dust needs to be recovered during production.

[0003] When a dust recovery device is used to recover the dust generated in production, a suction mechanism is generally used to generate negative pressure for suction, and then the dust is filtered by a filter device during the suction process, and then the separated dust is recovered. The filter element in the dust recovery device needs to be replaced after a certain period of use. The filter element in the existing dust recovery device is not convenient to remove, and the dust attached to the filter element will be taken out with the filter element during replacement and brought to the external space, causing secondary pollution. For example, Chinese patent announcement number CN110812965A in the prior art discloses a workshop dust recovery device, which is realized by installing two rectangular frame structures in the bag to achieve that when dust needs to be filtered, the two frame structures rotate and open the bag to a rectangular cavity structure, and the bag dust collector can work normally. When the bag needs to be cleaned, the two rectangular frames are rotated to the same horizontal plane, and the bag is supported into a flat structure. At this time, the outer surface of the bag is cleaned by moving the brush close to the bag up and down. In the disclosed device, although it can clean the dust accumulated on the surface of the filter element bag, when the bag is replaced, the dust outside the bag will adhere to the bag and be brought to the external environment, causing pollution to the external environment. Summary of the invention

[0004] The object of the present invention is to solve the above technical problems and provide a dust recovery device in a sulfamic acid production system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The dust recovery device in the aminosulfonic acid production system comprises a filter box and an air extraction box, wherein the filter box is provided with a filter cloth for filtering dust, an air inlet is provided at one end of the filter box, a connecting tube is fixedly connected to the end of the filter box away from the air inlet, an air extraction box is detachably connected to the connecting tube, the inner cavity of the air extraction box is communicated with the inner cavity of the filter box, and an air outlet is provided at the end of the air extraction box away from the filter box; an air suction fan is installed in the air suction box, a fan blade is fixedly connected to the rotating shaft of the air suction fan, and the air suction fan drives the fan blade to rotate to extract air from the filter box to form a negative pressure and suck the external air from the air inlet into the filter box for filtration;

[0007] The filter cloth is a conical structure, and the filter cloth is provided with a fixed flange at the open end of the conical structure, and the fixed flange is locked in the connecting cylinder, and the filter cloth is provided with a fixed column at the top end of the cone of the conical structure; the end of the filter box is slidably connected with a push-pull rod, one end of the push-pull rod extends into the filter box and is fixedly connected with a support rod, and a locking mechanism is provided on the support rod, and the fixed column is located in the filter box and locked in the locking mechanism; when the push-pull rod is pulled out toward one end of the vacuum box, the locking mechanism is moved into the connecting cylinder and the locking mechanism unlocks the fixed column, so that the fixed column passes through the fixed flange and drives the filter surface of the filter cloth to be pocketed in the filter cloth.

[0008] Furthermore, the locking mechanism includes a fixed block fixed on the support rod, a clamping groove for accommodating a fixed column is provided in the fixed block, a first gear is rotatably connected to the fixed block, a clamping rod is fixedly connected to the first gear, the clamping rod extends into the clamping groove and abuts against the outer wall of the fixed column to clamp the fixed column, an end of the clamping rod close to the fixed column is inclined away from the vacuum box, a first compression spring is provided on the side of the clamping rod away from the fixed column, and the first compression spring abuts against the clamping rod to provide elastic force to drive the clamping rod toward the fixed column.

[0009] Furthermore, a push block is fixedly connected to the inner wall of the filter box, and the push block is located at one end of the filter box close to the connecting tube, and a first guide slope is provided on the side of the push block close to the support rod; a push rod is slidably connected to the support rod, and the upper end of the push rod extends out of the support rod and is provided with a second guide slope, and the second guide slope is arranged opposite to the first guide slope, and when the support rod moves to the push block, the first guide slope squeezes the second guide slope so that the push rod moves toward the fixed block and retracts into the support rod; a accommodating cavity is opened on the fixed block and a driving rod is slidably connected to the accommodating cavity The driving rod is fixedly connected with a rack, and the rack and the first gear are meshed with gears to form a gear-rack transmission; the pushing rod extends to the fixed block at one end away from the second guide inclined surface and is provided with a third guide inclined surface, and the driving rod is provided with a fourth guide inclined surface at one end close to the pushing rod, and the third guide inclined surface is affixed to the fourth guide inclined surface and slidably cooperates with the fourth guide inclined surface. When the pushing rod is retracted into the support rod, the pushing rod squeezes the driving rod so that the driving rod moves and drives the first gear to rotate. The rotation of the first gear drives the clamping rod to rotate in a direction away from the fixed column to release the locking state of the fixed column.

[0010] Furthermore, a positioning block is fixedly connected to the end of the filter box, a sliding cavity is provided on the positioning block, a locking tongue is slidably fitted in the sliding cavity, a toggle rod is fixedly connected to one side of the locking tongue, the toggle rod extends to the outside of the positioning block, a positioning groove is provided on the push-pull rod, and the locking tongue extends into the positioning groove to lock the push-pull rod.

[0011] Furthermore, a second compression spring is arranged in the sliding cavity, and the second compression spring abuts against an end of the locking tongue away from the push-pull rod.

[0012] Furthermore, a mounting ring is slidably connected to the inner wall of the connecting cylinder, and the fixed flange of the filter cloth is installed on the mounting ring, and a third compression spring is provided inside the connecting cylinder, one end of the third compression spring abuts against the end of the filter box, and the other end of the third compression spring abuts against the mounting ring; a slide rail is fixedly connected to the inner wall of the exhaust box, and a first slider is slidably connected to the slide rail, and the first slider is located on the side of the mounting ring away from the third compression spring, and the first slider is fixedly connected to the rotating shaft of the suction fan; a double-wire reciprocating screw is fixedly connected to the rotating shaft of the suction fan, and the double-wire reciprocating screw is arranged parallel to the slide rail, and a second slider is slidably matched on the double-wire reciprocating screw, and the connecting rod is fixed on the second slider, and the double-wire reciprocating screw rotates to drive the second slider to reciprocate back and forth along the axial direction of the double-wire reciprocating screw, driving the first slider to move back and forth to intermittently squeeze the mounting ring.

[0013] Furthermore, a pressing ring is detachably connected to the mounting ring via bolts, and the fixed flange of the filter cloth is clamped on the mounting ring via the pressing ring.

[0014] Furthermore, a receiving hopper is provided at the bottom of the filter box, and a collecting box is fixedly connected below the receiving hopper. The receiving hopper guides the dust in the filter box into the collecting box for collection.

[0015] The dust recovery device in the aminosulfonic acid production system provided by the present invention has the following beneficial effects: when in use, the air inlet is connected to the dust-generating area of ​​the equipment through the air pipe, and the fan blades are driven by the suction fan in the suction box to generate negative pressure in the filter box, thereby sucking the dust in the dust-generating area into the filter box, and the dust is filtered through the filter cloth when passing through the filter box, and the dust is blocked on the surface of the filter cloth on the side away from the suction box, and the filtered air passes through the suction box and is discharged from the air outlet; when the filter cloth needs to be replaced, the suction fan is stopped, and the push-pull rod is pulled outward, so that the locking mechanism moves toward the suction box, thereby causing the fixed column to move and drive the filter cloth to The filter cloth is then pulled out of the air box and the filter is then removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0017] Figure 1 A schematic diagram of the structure of a dust recovery device in the aminosulfonic acid production system provided by the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the local structure of part A in the middle;

[0019] Figure 3 for Figure 1 Schematic diagram of the local structure of the middle B part;

[0020] Figure 4 for Figure 1 Schematic diagram of the local structure of the middle C part;

[0021] Figure 5 The present invention is a schematic structural diagram of a dust recovery device in the aminosulfonic acid production system provided by the present invention, in which the vacuum box is removed and the locking mechanism is released from the locked state.

[0022] Explanation of the reference numerals in the figure: 1. Filter box; 11. Air inlet; 12. Top pressure block; 13. First guide slope; 14. Receiving hopper; 15. Collecting box; 2. Air extraction box; 21. Air outlet; 22. Suction fan; 23. Fan blade; 24. Slide rail; 25. First slider; 26. Connecting rod; 27. Double-wire reciprocating screw rod; 28. Second slider; 3. Filter cloth; 31. Fixed flange; 32. Fixed column; 4. Connecting cylinder; 41. Mounting ring; 42. Third compression spring; 43. Pressing ring; 5. Push-pull rod; 51. Support rod; 52. Pushing rod; 53. Positioning groove; 6. Locking mechanism; 61. Fixing block; 62. Clamping groove; 63. First gear; 64. Clamping rod; 65. First compression spring; 66. Driving rod; 67. Rack; 7. Positioning block; 71. Sliding cavity; 72. Lock tongue; 73. Toggle rod; 74. Second compression spring. DETAILED DESCRIPTION

[0023] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0026] like Figure 1-Figure 5 As shown, the dust recovery device in the aminosulfonic acid production system includes a filter box 1 and an exhaust box 2, wherein the filter box 1 is provided with a filter cloth 3 for filtering dust, an air inlet 11 is provided at one end of the filter box 1, and a connecting tube 4 is fixedly connected to the end of the filter box 1 away from the air inlet 11, and the exhaust box 2 is detachably connected to the connecting tube 4, the inner cavity of the exhaust box 2 is communicated with the inner cavity of the filter box 1, and an air outlet 21 is provided at the end of the exhaust box 2 away from the filter box 1; an air suction fan 22 is installed in the exhaust box 2, and a fan blade 23 is fixedly connected to the rotating shaft of the air suction fan 22, and the air suction fan 22 drives the fan blade 23 to rotate to exhaust air in the filter box 1 to form a negative pressure, and the external air is sucked from the air inlet 11 into the filter box 1 for filtration;

[0027] The filter cloth 3 is a conical structure, and a fixed flange 31 is provided at the open end of the conical structure of the filter cloth 3, and the fixed flange 31 is locked in the connecting tube 4. The filter cloth 3 is provided with a fixed column 32 at the top of the cone of the conical structure; a push-pull rod 5 is slidably connected to the end of the filter box 1, and one end of the push-pull rod 5 extends into the filter box 1 and is fixedly connected to a support rod 51, and a locking mechanism 6 is provided on the support rod 51, and the fixed column 32 is located in the filter box 1 and locked in the locking mechanism 6; when the push-pull rod 5 is pulled out toward one end of the vacuum box 2, the locking mechanism 6 is moved into the connecting tube 4 and the locking mechanism 6 unlocks the fixed column 32, so that the fixed column 32 passes through the fixed flange 31 to drive the filter surface of the filter cloth 3 to be pocketed in the filter cloth 3.

[0028] By adopting the above technical solution, when in use, the air inlet 11 is connected to the dust-generating area of ​​the equipment through the air pipe, and the fan blades 23 are driven by the suction fan 22 in the air extraction box 2, so that negative pressure is generated in the filter box 1, so that the dust in the dust-generating area is sucked into the filter box 1, and the dust is filtered through the filter cloth 3 when passing through the filter box 1, and the dust is blocked on the surface of the filter cloth 3 on the side away from the air extraction box 2, and the filtered air passes through the air extraction box 2 and is discharged from the air outlet 21; when the filter cloth 3 needs to be replaced, the suction fan 22 is stopped, and the push-pull rod 5 is pulled outward, so that the locking mechanism 6 moves toward the air extraction box 2, so that the fixing column 32 moves and drives the filter cloth 3 to the air extraction box 2 The filter cloth 3 is moved in the direction of rotation, and the fixing column 32 passes through the fixing flange 31 to drive the filtering surface of the filter cloth 3 to be pocketed in the filter cloth 3. Then the air suction box 2 is disassembled and the filter cloth 3 is removed. At this time, the side of the filter cloth 3 close to the air suction box 2 is located inside the side away from the air suction box 2 and the filtering side can be wrapped in the filter cloth 3, so that the dust attached to the filtering surface of the filter cloth 3 is wrapped in the filter cloth 3 and the outer surface is the side not in contact with the dust, thereby preventing the dust from being raised again when the filter cloth 3 is removed, facilitating the replacement of the filter cloth 3 and reducing the dust from being raised again during the replacement of the filter cloth 3; when disassembling, the outer surface of the filter cloth 3 is the side not in contact with the dust, thereby preventing people from contacting the aminosulfonic acid dust.

[0029] Specifically, the locking mechanism 6 includes a fixed block 61 fixed on the support rod 51, and a clamping groove 62 for accommodating the fixed column 32 is opened in the fixed block 61. A first gear 63 is rotatably connected to the fixed block 61, and a clamping rod 64 is fixedly connected to the first gear 63. The clamping rod 64 extends into the clamping groove 62 and abuts against the outer wall of the fixed column 32 to clamp the fixed column 32. The end of the clamping rod 64 close to the fixed column 32 is inclined away from the vacuum box 2. A first compression spring 65 is provided on the side of the clamping rod 64 away from the fixed column 32. The first compression spring 65 abuts against the clamping rod 64 to provide elastic force to drive the clamping rod 64 toward the fixed column 32. The fixing column 32 is clamped by the clamping rod 64 abutting against the fixing column 32, and the clamping state is maintained under the elastic force of the first compression spring 65. When the filter cloth 3 is subjected to the filtering wind pressure during the filtering process, the air exerts a force on the filter cloth 3 away from the filter box 1, so that the fixing column 32 has a tendency to move from the clamping groove 62 to the suction box 2. Since the clamping rod 64 is arranged obliquely, the fixing column 32 has a tendency to move, so that the clamping force of the clamping rod 64 on the fixing column 32 is greater, thereby making the clamping more firm and preventing the fixing column 32 from being separated from the clamping groove 62 during the filtering process. Specifically, the clamping rod 64 is provided with a clamping plane near one end of the fixing column 32, and the clamping plane is provided with convex ridges for increasing friction, thereby preventing the fixing column 32 from slipping. Specifically, the clamping rod 64 is arranged in plurality along the circumference of the clamping groove 62, and the plurality of clamping rods 64 work together to clamp the fixing column 32.

[0030] Specifically, a pressing block 12 is fixedly connected to the inner wall of the filter box 1, and the pressing block 12 is located at one end of the filter box 1 close to the connecting tube 4. A first guiding inclined surface 13 is provided on the side of the pressing block 12 close to the support rod 51; a pressing rod 52 is slidably connected to the support rod 51, and the upper end of the pressing rod 52 extends out of the support rod 51 and is provided with a second guiding inclined surface, and the second guiding inclined surface is arranged opposite to the first guiding inclined surface 13. When the support rod 51 moves to the pressing block 12, the first guiding inclined surface 13 squeezes the second guiding inclined surface so that the pressing rod 52 moves toward the fixed block 61 and retracts into the support rod 51; a receiving cavity is provided on the fixed block 61, and a driving rod 6 is slidably connected to the receiving cavity 6. A rack 67 is fixedly connected to the driving rod 66, and the rack 67 and the first gear 63 are meshed with gears to form a rack-and-gear transmission; the end of the pushing rod 52 away from the second guiding slope extends to the fixed block 61 and is provided with a third guiding slope, and the end of the driving rod 66 close to the pushing rod 52 is provided with a fourth guiding slope, and the third guiding slope is fitted on the fourth guiding slope and slidably cooperates with the fourth guiding slope. When the pushing rod 52 is retracted into the support rod 51, the pushing rod 52 squeezes the driving rod 66 so that the driving rod 66 moves and drives the first gear 63 to rotate, and the rotation of the first gear 63 drives the clamping rod 64 to rotate in the direction away from the fixed column 32 to release the locking state of the fixed column 32. When the filter cloth 3 is disassembled, the push-pull rod 5 is pulled out toward one side of the air extraction box 2, driving the support rod 51 to move toward the air extraction box 2. When the support rod 51 moves to the position of the top pressure block 12, the top pressure block 12 squeezes the top pressure rod 52, so that the top pressure rod 52 retracts into the support rod 51, and the top pressure rod 52 squeezes the driving rod 66 to move. The driving rod 66 drives the rack 67 to move and drive the first gear 63 to rotate, so that the clamping rod 64 rotates away from the fixing column 32, thereby releasing the locking state of the fixing column 32, so that when the filter cloth 3 is disassembled, the clamping rod 64 can rotate away from the fixing column 32, thereby releasing the locking state of the fixing column 32, so that when the filter cloth 3 is disassembled, the push-pull rod 5 During the process of unloading the filter cloth 3, the fixing column 32 of the filter cloth 3 is pulled out toward the vacuum box 2, and the locking of the fixing column 32 is released, so as to facilitate the disassembly of the filter cloth 3; when installing the filter cloth 3, the push-pull rod 5 is pushed to make the support rod 51 disengage from the top pressure block 12, and the fixing column 32 is inserted into the clamping groove 62. The clamping rod 64 automatically clamps and locks the fixing column 32 under the elastic force of the first compression spring 65, and driven by the elastic force of the first compression spring 65, the first gear 63 drives the rack 67 to move so that the top pressure rod 52 is reset.

[0031] Specifically, a positioning block 7 is fixedly connected to the end of the filter box 1, a sliding cavity 71 is provided on the positioning block 7, a locking tongue 72 is slidably fitted in the sliding cavity 71, a toggle rod 73 is fixedly connected to one side of the locking tongue 72, the toggle rod 73 extends to the outside of the positioning block 7, a positioning groove 53 is provided on the push-pull rod 5, and the locking tongue 72 extends into the positioning groove 53 to lock the push-pull rod 5. The locking tongue 72 cooperates with the push-pull rod 5, so that when the push-pull rod 5 pushes the fixed block 61 to a predetermined position in the filter box 1, the locking tongue 72 locks the push-pull rod 5 to prevent the push-pull rod 5 from moving during operation; the locking tongue 72 is disengaged from the positioning groove 53 by pushing the toggle rod 73, so that the locking state of the push-pull rod 5 can be released, so that the push-pull rod 5 can be pulled out to facilitate the replacement of the filter cloth 3.

[0032] Specifically, a second compression spring 74 is provided in the sliding cavity 71, and the second compression spring 74 abuts against the end of the lock tongue 72 away from the push-pull rod 5. Through the action of the second compression spring 74, when the positioning groove 53 moves to the position of the lock tongue 72 during the movement of the push-pull rod 5, the lock tongue 72 can automatically lock into the positioning groove 53 under the action of elastic force to lock the push-pull rod 5.

[0033] Specifically, a mounting ring 41 is slidably connected to the inner wall of the connecting cylinder 4, and the fixed flange 31 of the filter cloth 3 is installed on the mounting ring 41. A third compression spring 42 is arranged inside the connecting cylinder 4, and one end of the third compression spring 42 abuts against the end of the filter box 1, and the other end of the third compression spring 42 abuts against the mounting ring 41; a slide rail 24 is fixedly connected to the inner wall of the air extraction box 2, and a first slider 25 is slidably connected to the slide rail 24, and the first slider 25 is located at the mounting ring 41 away from the third compression spring 42. On one side of the spring 42, a connecting rod 26 is fixedly connected to the first slider 25; a double-wire reciprocating screw 27 is fixedly connected to the rotating shaft of the suction fan 22, and the double-wire reciprocating screw 27 is arranged parallel to the slide rail 24. A second slider 28 is slidably fitted on the double-wire reciprocating screw 27, and the connecting rod 26 is fixed on the second slider 28. The double-wire reciprocating screw 27 rotates to drive the second slider 28 to reciprocate back and forth along the axial direction of the double-wire reciprocating screw 27, thereby driving the first slider 25 to move back and forth to intermittently squeeze the mounting ring 41. The rotation shaft of the suction fan 22 drives the fan blades 23 to rotate and suck air, and at the same time drives the double-line reciprocating screw 27 to rotate. The rotation of the double-line reciprocating screw 27 drives the second slider 28 to move back and forth along the axial direction of the double-line reciprocating screw 27, thereby driving the first slider 25 to move back and forth along the slide rail 24. During the reciprocating movement of the first slider 25, it moves toward the mounting ring 41 to squeeze the mounting ring 41, so that the mounting ring 41 squeezes the third compression spring 42, and the third compression spring 42 contracts. When the first slider 25 is separated from the mounting ring 41, the mounting ring 41 is reset under the action of the elastic force, and then the mounting ring 41 is intermittently shaken under the squeezing of the first slider 25, thereby driving the filter cloth 3 to intermittently shake, and shaking off the dust accumulated on the surface of the filter cloth 3 during filtering.

[0034] Specifically, in order to facilitate the removal of the filter cloth 3 , a pressing ring 43 is detachably connected to the mounting ring 41 via bolts, and the fixed flange 31 of the filter cloth 3 is clamped on the mounting ring 41 via the pressing ring 43 .

[0035] Specifically, in order to facilitate the centralized collection of dust filtered in the filter box 1, a receiving hopper 14 is provided at the bottom of the filter box 1, and a collecting box 15 is fixedly connected below the receiving hopper 14. The receiving hopper 14 guides the dust in the filter box 1 into the collecting box 15 for collection.

[0036] The working principle of the dust recovery device in the aminosulfonic acid production system provided by the present invention is as follows: the suction fan 22 in the exhaust box 2 drives the fan blades 23 to generate negative pressure in the filter box 1, so that the dust in the dust-raising area is sucked into the filter box 1, and the dust is filtered through the filter cloth 3 when passing through the filter box 1; during the filtering process, the rotating shaft of the suction fan 22 rotates to drive the fan blades 23 to rotate and suck air, while driving the double-line reciprocating screw rod 27 to rotate, and the rotation of the double-line reciprocating screw rod 27 drives the second slider 28 to reciprocate back and forth along the axial direction of the double-line reciprocating screw rod 27, thereby driving the first slider 25 to reciprocate along the slide rail 24, and under the extrusion of the first slider 25, the mounting ring 41 is intermittently shaken, thereby driving the filter cloth 3 to intermittently shake, and the dust accumulated on the surface of the filter cloth 3 during filtration is shaken off; when the filter cloth 3 needs to be disassembled and replaced, the suction fan 22 stops, and the push-pull rod 5 is pulled outward, so that the fixed block 61 moves toward the exhaust box 2, so that the fixed column 32 moves and The filter cloth 3 is driven to move toward the vacuum box 2, and the fixed column 32 passes through the fixed flange 31 to drive the filter surface of the filter cloth 3 to be pocketed in the filter cloth 3; the push-pull rod 5 is pulled outward to drive the fixed column 32 to pass through the fixed flange 31, and at the same time, the support rod 51 is driven to move to the position of the top pressure block 12, and the top pressure block 12 squeezes the top pressure rod 52, so that the top pressure rod 52 retracts into the support rod 51, and the top pressure rod 52 squeezes the driving rod 66 to move, and the driving rod 66 drives the rack 67 to move and drive the first gear 63 to rotate , so that the clamping rod 64 rotates away from the fixing column 32 to release the locking state of the fixing column 32, and then the vacuum box 2 and the pressure ring 43 are disassembled, so that the filter cloth 3 can be removed conveniently. At this time, the side of the filter cloth 3 close to the vacuum box 2 is located inside the side away from the vacuum box 2 and the filtering side can be wrapped in the filter cloth 3, so that the dust attached to the filtering surface of the filter cloth 3 is wrapped in the filter cloth 3 and the outer surface is the side not in contact with the dust, thereby preventing the dust from being raised again when the filter cloth 3 is removed.

[0037] The parts not involved in this technical solution can be implemented by using existing technologies.

[0038] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of the present invention to be protected includes the attached claims and their equivalents.

Claims

1. A dust recovery device in a sulfamic acid production system, characterized in that: It comprises a filter box (1) and an air extraction box (2), wherein the filter box (1) is provided with a filter cloth (3) for filtering dust, an air inlet (11) is provided at one end of the filter box (1), an end of the filter box (1) away from the air inlet (11) is fixedly connected to a connecting tube (4), an air extraction box (2) is detachably connected to the connecting tube (4), the inner cavity of the air extraction box (2) is communicated with the inner cavity of the filter box (1), and an air outlet (21) is provided at the end of the air extraction box (2) away from the filter box (1); an air suction fan (22) is installed in the air extraction box (2), a fan blade (23) is fixedly connected to the rotating shaft of the air suction fan (22), and the air suction fan (22) drives the fan blade (23) to rotate to extract air from the filter box (1) to form a negative pressure, thereby sucking external air from the air inlet (11) into the filter box (1) for filtering; The filter cloth (3) is a conical structure. The filter cloth (3) is provided with a fixed flange (31) at the open end of the conical structure. The fixed flange (31) is locked in the connecting tube (4). The filter cloth (3) is provided with a fixed column (32) at the top end of the cone of the conical structure. The end of the filter box (1) is slidably connected with a push-pull rod (5). One end of the push-pull rod (5) extends into the filter box (1) and is fixedly connected with a support rod (51). A locking mechanism (6) is provided on the support rod (51). The fixed column (32) is located in the filter box (1) and is locked in the locking mechanism (6). When the push-pull rod (5) is pulled out toward one end of the air extraction box (2), the locking mechanism (6) is moved into the connecting tube (4) and the locking mechanism (6) unlocks the fixed column (32), so that the fixed column (32) passes through the fixed flange (31) and drives the filter surface of the filter cloth (3) to be pocketed in the filter cloth (3). The locking mechanism (6) comprises a fixing block (61) fixed on the support rod (51), a clamping groove (62) for accommodating the fixing column (32) being provided in the fixing block (61), a first gear (63) being rotatably connected in the fixing block (61), a clamping rod (64) being fixedly connected to the first gear (63), the clamping rod (64) extending into the clamping groove (62) and abutting against the outer wall of the fixing column (32) to clamp the fixing column (32), an end of the clamping rod (64) close to the fixing column (32) being arranged inclined in a direction away from the vacuum box (2), a first compression spring (65) being provided on a side of the clamping rod (64) away from the fixing column (32), the first compression spring (65) abutting against the clamping rod (64) to provide elastic force to drive the clamping rod (64) in the direction of the fixing column (32); A pressing block (12) is fixedly connected to the inner wall of the filter box (1), and the pressing block (12) is located at one end of the filter box (1) close to the connecting tube (4). A first guiding inclined surface (13) is provided on the side of the pressing block (12) close to the support rod (51); a pressing rod (52) is slidably connected to the support rod (51), and the upper end of the pressing rod (52) extends out of the support rod (51) and is provided with a second guiding inclined surface, and the second guiding inclined surface is arranged opposite to the first guiding inclined surface (13). When the support rod (51) moves to the pressing block (12), the first guiding inclined surface (13) squeezes the second guiding inclined surface so that the pressing rod (52) moves toward the fixed block (61) and retracts into the support rod (51); a receiving cavity is provided on the fixed block (61), and a driving rod (66) is slidably connected to the receiving cavity. The driving rod (66) is fixedly connected with a rack (67), and the rack (67) and the first gear (63) are meshed with gears to form a gear-rack (67) transmission; the end of the pushing rod (52) away from the second guide inclined surface extends to the fixed block (61) and is provided with a third guide inclined surface, and the end of the driving rod (66) close to the pushing rod (52) is provided with a fourth guide inclined surface, and the third guide inclined surface is attached to the fourth guide inclined surface and slidably cooperates with the fourth guide inclined surface. When the pushing rod (52) is retracted into the support rod (51), the pushing rod (52) squeezes the driving rod (66) so that the driving rod (66) moves and drives the first gear (63) to rotate, and the first gear (63) rotates and drives the clamping rod (64) to rotate in a direction away from the fixed column (32) to release the locking state of the fixed column (32).

2. The dust recovery device in the aminosulfonic acid production system according to claim 1, characterized in that: A positioning block (7) is fixedly connected to the end of the filter box (1), a sliding cavity (71) is provided on the positioning block (7), a locking tongue (72) is slidably fitted in the sliding cavity (71), a toggle rod (73) is fixedly connected to one side of the locking tongue (72), the toggle rod (73) extends to the outside of the positioning block (7), a positioning groove (53) is provided on the push-pull rod (5), and the locking tongue (72) extends into the positioning groove (53) to lock the push-pull rod (5).

3. The dust recovery device in the aminosulfonic acid production system according to claim 2, characterized in that: A second compression spring (74) is arranged in the sliding cavity (71), and the second compression spring (74) abuts against an end of the locking tongue (72) away from the push-pull rod (5).

4. The dust recovery device in the aminosulfonic acid production system according to claim 1, characterized in that: A mounting ring (41) is slidably connected to the inner wall of the connecting tube (4), and the fixed flange (31) of the filter cloth (3) is mounted on the mounting ring (41). A third compression spring (42) is arranged inside the connecting tube (4), and one end of the third compression spring (42) abuts against the end of the filter box (1), and the other end of the third compression spring (42) abuts against the mounting ring (41); a slide rail (24) is fixedly connected to the inner wall of the air extraction box (2), and a first slider (25) is slidably connected to the slide rail (24), and the first slider (25) is located at the mounting ring (41) away from the third compression spring. On one side of the spring (42), a connecting rod (26) is fixedly connected to the first slider (25); a double-wire reciprocating screw (27) is fixedly connected to the rotating shaft of the suction fan (22), the double-wire reciprocating screw (27) is arranged parallel to the slide rail (24), a second slider (28) is slidably matched on the double-wire reciprocating screw (27), the connecting rod (26) is fixed on the second slider (28), the double-wire reciprocating screw (27) rotates to drive the second slider (28) to reciprocate back and forth along the axial direction of the double-wire reciprocating screw (27), and drives the first slider (25) to reciprocate to intermittently squeeze the mounting ring (41).

5. The dust recovery device in the aminosulfonic acid production system according to claim 4, characterized in that: A pressing ring (43) is detachably connected to the mounting ring (41) via bolts, and the fixed flange (31) of the filter cloth (3) is clamped on the mounting ring (41) via the pressing ring (43).

6. The dust recovery device in the aminosulfonic acid production system according to any one of claims 1 to 5, characterized in that: A receiving hopper (14) is provided at the bottom of the filter box (1), and a collecting box (15) is fixedly connected below the receiving hopper (14). The receiving hopper (14) guides dust in the filter box (1) into the collecting box (15) for collection.

Images