Dust removal device for water reducing agent production

Abstract

The utility model discloses a dust removal device for water reducing agent production, which relates to the technical field of water reducing agent production and comprises a bottom plate, a motor is arranged on the top surface of the bottom plate, a support is fixedly connected to the top surface of the bottom plate, a rotating shaft fixedly connected with the output end of the motor is fixedly connected with the axis of the back surface of an eccentric turntable, and the front surface of the eccentric turntable is rotatably connected with a first connecting rod. A double-hinged plate is hinged to the right portion of the first connecting rod and hinged to a second connecting rod arranged on the right side of the first connecting rod, a two-way connecting rod is hinged to the top of the second connecting rod, a connecting shaft is rotatably connected to the inner wall of the middle of the two-way connecting rod and fixedly connected to the inner sides of the two supports, and a convex column is rotatably connected to the inner wall of the right side of the two-way connecting rod. A pressing plate is hinged to the bottom of the third connecting rod, and a sludge stacking bin is arranged outside the pressing plate. The output end of the motor drives the first connecting rod on the right side of the eccentric rotating disc to eccentrically rotate to push the mud stacking bin, and meanwhile the second connecting rod drives the two-way connecting rod to rotate, so that the downward pressing plate is lifted again, and the effect of pressing mud-water mixtures is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water-reducing agent production technology, specifically to a dust removal device for water-reducing agent production. Background Technology

[0002] In the production of water-reducing agents, raw material transportation and reaction processes easily generate large amounts of dust, which not only pollutes the environment and endangers worker health, but may also wear down equipment, affect product quality, and even cause dust explosions. Traditional dust removal technologies, such as bag filters, have limitations such as easy clogging and high maintenance costs; electrostatic precipitators are easily affected by the resistivity of dust; and cyclone dust collectors are ineffective at handling fine dust. However, a dust removal method that combines dust and water for collection and treatment can utilize the affinity between water and dust to efficiently capture dust through atomized spraying and washing, overcoming the shortcomings of traditional dust removal technologies, achieving highly efficient dust removal, and ensuring production safety and environmental friendliness.

[0003] Patent publication number CN213433592U discloses a dust removal device for water-reducing agent production, including a main cylinder and a dust collection hood. The dust collection hood is connected to an exhaust fan via a dust suction pipe. Multiple sets of circumferential annular pipes are arranged inside the main cylinder along its axial direction. The circumferential annular pipes are located below the dust discharge hood, and multiple spray nozzles are evenly distributed on the circumferential annular pipes, with the spray nozzles facing the center of the circumferential annular pipes. A water tank is arranged on the inner wall of the main cylinder, and a booster pump is arranged inside the water tank. The booster pump is connected to the circumferential annular pipes via a water pipe. A pair of extrusion rollers are arranged inside the main cylinder, with the center of the pair of extrusion rollers located below the center of the circumferential annular pipes. The extrusion rollers are driven by a drive motor and a belt. A conveyor belt is arranged at the bottom of the main cylinder corresponding to the extrusion rollers. The conveyor belt is driven by a conveyor motor, a drive wheel, and a driven wheel. The dust after being extruded by the extrusion rollers is transported to the outside of the main cylinder via the conveyor belt.

[0004] To address the dust problem generated during the packaging of water-reducing agents, existing technology involves spraying water from a spray nozzle on a ring pipe, causing the dust to absorb water and settle at the center of two extrusion rollers. The extrusion rollers then compact and compress the settled dust before conveying it out of the main cylinder via a conveyor belt. However, this method still results in some dust collection and processing issues, leading to a reduction in dust removal efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a dust removal device for the production of water-reducing agents, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A dust removal device for water-reducing agent production includes a base plate. A motor is mounted on the top surface of the base plate, and supports are fixedly connected to the top surface of the base plate. The supports are symmetrically distributed. A rotating shaft fixedly connected to the output end of the motor is fixedly connected to the back axis of an eccentric turntable. A connecting rod one is rotatably connected to the front of the eccentric turntable. A double-hinged plate is hinged to the right side of the connecting rod one. The double-hinged plate is hinged to a connecting rod two located on the right side of the connecting rod one. The connecting rod two is L-shaped. A bidirectional connecting rod is hinged to the top of the connecting rod two. A connecting rod is rotatably connected to the inner wall of the middle part of the bidirectional connecting rod. The shaft is fixedly connected to the inner side of the two supports. A protruding column is rotatably connected to the inner right side of the bidirectional connecting rod. The bidirectional connecting rod is divided into two sections, with one section at the top and one at the rear of the right half, connected by a shaft. A connecting rod three is provided on the inner right side of the bidirectional connecting rod. The connecting rod three is fixedly connected to the protruding column. A pressure plate is hinged to the bottom of the connecting rod three. A mud storage bin is provided outside the pressure plate. The mud storage bin is fixedly connected to a double hinge plate. The bottom of the mud storage bin is hollow. The mud storage bin is slidably connected to the top surface of the base plate. A dust collection mechanism is provided on the back of the mud storage bin. A collection mechanism is provided at the bottom of the base plate.

[0008] It also includes a volume control mechanism, a dust collection mechanism, a collection mechanism, and a fixing mechanism. The volume control mechanism is used to control the entry of mud and water; the dust collection mechanism is used to settle dust; the collection mechanism is used to discharge mud and water; and the fixing mechanism is used to fix the device.

[0009] A further improvement of the present invention is that the control mechanism includes a spring, a baffle is fixedly connected to the side of the protruding post, a slide plate is slidably connected to the side of the baffle, a spring is fixedly connected to the bottom of the baffle, a connecting plate is fixedly connected to the bottom of the spring, the bottom of the connecting plate is inclined from the upper right to the lower left, and the slide plate extends downward to completely cover the spring.

[0010] A further improvement of the present invention is that: the dust collection mechanism includes a guide plate, a sleeve is provided at the top of the mud storage bin, the sleeve is fixedly connected to the bracket, the sleeve is slidably connected to the mud storage bin, a guide plate is fixedly connected to the back of the sleeve, the bottom inner wall of the guide plate is a slope from the upper right to the lower left and fits against the bottom of the connecting plate, a dust washing bin is fixedly connected to the top of the guide plate, and a dust collection pipe is provided on the right side of the dust washing bin.

[0011] A further improvement of this utility model is that the dust collection mechanism further includes a water spraying component, a fixing plate is fixedly connected to the left side of the dust washing chamber, a reinforcing rib is fixedly connected to the bottom of the fixing plate, the reinforcing rib is fixedly connected to the left side of the dust washing chamber, a fan is provided at the top of the fixing plate, the output end of the fan is inserted into the slot on the left side of the dust washing chamber, and a water spraying component is provided at the top of the dust washing chamber, the water spraying component is composed of a water pipe and two rows of atomizing nozzles.

[0012] A further improvement of the present invention is that: the collection mechanism includes a collection drawer, a water filter trough is provided on the top surface of the bottom plate corresponding to the bottom of the mud storage bin, a mud collection bin is provided on the right bottom of the bottom of the bottom plate water filter trough, a collection drawer is slidably connected to the inner wall of the mud collection bin, a diversion bin is fixedly connected to the bottom of the bottom plate water filter trough, and a drain pipe is fixedly connected to the bottom of the diversion bin.

[0013] A further improvement of the present invention is that the fixing mechanism includes a first support column, an extension plate is fixedly connected to the outer wall of the middle part of the base plate, the first support column is fixedly connected to the bottom surface of the extension plate, a second support column is fixedly connected to the bottom left side of the base plate, a fixed base plate is fixedly connected to the bottom surface of the second support column, and the fixed base plate is fixedly connected to the first support column.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] 1. This utility model provides a dust removal device for water-reducing agent production, which adopts the cooperation of a pressing mechanism, a base plate, a motor, a bracket, an eccentric turntable, a connecting rod one, a double hinge plate, a connecting rod two, a bidirectional connecting rod, a connecting shaft, a connecting rod three, a protruding column, a pressure plate, a mud storage bin, a quantity control mechanism, a baffle, a sliding plate, a spring, and a connecting plate. The motor output end drives the connecting rod one on the right side of the eccentric turntable to rotate eccentrically, thereby pushing the mud storage bin. At the same time, the connecting rod two drives the bidirectional connecting rod to rotate, so that the lower pressure plate is raised again, which plays the role of pressing the mud-water mixture.

[0016] 2. This utility model provides a dust removal device for the production of water-reducing agents. It adopts the cooperation of a dust collection mechanism, a guide plate, a dust washing chamber, a dust collection pipe, a fixed plate, reinforcing ribs, a fan, and a water spraying component. Dust is sucked into the dust washing chamber through the output end of the fan. The water spraying component causes the sucked dust and water to combine to form a mud-water mixture that falls downward onto the guide plate and enters the mud storage chamber, thus improving adaptability.

[0017] 3. This utility model provides a dust removal device for the production of water-reducing agents. It adopts a collection mechanism, a mud collection bin, a collection drawer, a diversion bin, a drain pipe, a fixing mechanism, an extension plate, a support column one, a support column two, and a fixed base plate. By pressing down the pressure plate, most of the water in the mud-water mixture enters the diversion bin through the water filter tank and is discharged through the drain pipe. The mud storage bin is pushed to the top of the mud collection bin, and the mud that has been pressed by water inside falls downward into the collection drawer, which improves adaptability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the pressing and pushing mechanism of this utility model;

[0020] Figure 3This is a schematic diagram of the pressing and pushing mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the pressing and pushing mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the measurement control mechanism of this utility model;

[0023] Figure 6 This is a schematic diagram of the dust collection mechanism of this utility model;

[0024] Figure 7 This is a schematic diagram of the collection mechanism of this utility model;

[0025] Figure 8 This is a schematic diagram of the fixing mechanism of this utility model.

[0026] In the diagram: 1. Pressing mechanism; 101. Base plate; 102. Motor; 103. Bracket; 104. Eccentric turntable; 105. Link 1; 106. Double hinge plate; 107. Link 2; 108. Bidirectional link; 109. Shaft; 110. Link 3; 111. Protruding column; 112. Pressure plate; 113. Sludge storage bin; 2. Control mechanism; 21. Baffle; 22. Slide plate; 23. Spring 24. Connecting plate; 3. Dust collection mechanism; 31. Guide plate; 32. Dust washing chamber; 33. Dust collection pipe; 34. Fixing plate; 35. Reinforcing rib; 36. Fan; 37. Water spray assembly; 4. Collection mechanism; 41. Mud collection chamber; 42. Collection drawer; 43. Drainage chamber; 44. Drain pipe; 5. Fixing mechanism; 51. Extension plate; 52. Support column one; 53. Support column two; 54. Fixing base plate. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to embodiments:

[0028] Example 1

[0029] like Figure 1-8As shown, this utility model provides a dust removal device for water-reducing agent production, including a base plate 101. A motor 102 is mounted on the top surface of the base plate 101, and a bracket 103 is fixedly connected to the top surface of the base plate 101. The brackets 103 are symmetrically distributed. The rotating shaft fixedly connected to the output end of the motor 102 is fixedly connected to the back axis of the eccentric turntable 104. A connecting rod 105 is rotatably connected to the front of the eccentric turntable 104. A double hinge plate 106 is hinged to the right side of the connecting rod 105. The double hinge plate 106 is hinged to a connecting rod 107 located on the right side of the connecting rod 105. The connecting rod 107 is L-shaped. A bidirectional connecting rod 108 is hinged to the top of the bidirectional connecting rod 107. A connecting shaft 109 is rotatably connected to the inner wall of the middle part of the bidirectional connecting rod 108. The connecting shaft 109 is fixed to the inner side of the two brackets 103. A protruding post 11 is rotatably connected to the inner wall of the right side of the bidirectional connecting rod 108. 1. The bidirectional connecting rod 108 is divided into two sections, with one section at the top and one at the rear of the right half, connected by a connecting shaft 109. The inner wall of the right side of the bidirectional connecting rod 108 has a connecting rod 3 110, which is fixedly connected to the protruding post 111. The bottom of the connecting rod 3 110 is hinged to a pressure plate 112. The outside of the pressure plate 112 is a mud storage bin 113, which is fixedly connected to a double hinge plate 106. The bottom of the mud storage bin 113 is hollow. The mud storage bin 113 is slidably connected to the top surface of the base plate 101. The back of the mud storage bin 113 is equipped with a dust suction mechanism 3, and the bottom of the base plate 101 is equipped with a collection mechanism 4. The system also includes a volume control mechanism 2, a dust suction mechanism 3, a collection mechanism 4, and a fixing mechanism 5. The volume control mechanism 2 is used to control the entry of mud and water; the dust suction mechanism 3 is used to settle dust; the collection mechanism 4 is used to discharge mud and water; and the fixing mechanism 5 is used to fix the device. The control mechanism 2 includes a spring 23, a baffle 21 fixedly connected to the side of the protrusion 111, a slide plate 22 slidably connected to the side of the baffle 21, a spring 23 fixedly connected to the bottom surface of the baffle 21, a connecting plate 24 fixedly connected to the bottom of the spring 23, the bottom of the connecting plate 24 tilts from the upper right to the lower left, and the slide plate 22 extends downward to completely cover the spring 23.

[0030] The motor 102 outputs a motor that drives the connecting rod 105 on the side of the eccentric turntable 104 to move eccentrically. When the eccentric movement reaches the leftmost position, the mud storage bin 113 slides to align with the sleeve inside the support 103, causing the connecting rod 107 to lift upwards. This lifts the bidirectional connecting rod 108, causing it to move from left to right, which in turn causes the pressure plate 112 to press the mud-water mixture downwards. At the same time, the extension of the protrusion 111 causes the baffle 21 to move downwards. After the baffle 21 moves downwards and the connecting plate 24 comes into contact with the guide plate 31, the baffle continues to press down on the spring. 23. When pressed to the maximum extent, the pressure plate 112 is pressed down to the bottom; when the eccentric movement reaches the far right, the first connecting rod 105 pushes the mud storage bin 113 to the right, while the second connecting rod 107 moves downward and the bidirectional connecting rod 108 moves from left to right, causing the pressure plate 112 to lift upward and the baffle 21 to lift upward. As the spring 23 is compressed to its original state, the connecting plate 24 remains in contact. When the third connecting rod 110 is raised to the top, the mud storage bin 113 slides to align with the sleeve inside the support 103, and the connecting plate 24 is raised.

[0031] Example 2

[0032] like Figure 1-8 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the dust collection mechanism 3 includes a guide plate 31, a sleeve is provided at the top of the mud storage bin 113, the sleeve is fixedly connected to the bracket 103, the sleeve is slidably connected to the mud storage bin 113, the guide plate 31 is fixedly connected to the back of the sleeve, the bottom inner wall of the guide plate 31 is a slope from the upper right to the lower left and fits against the bottom of the connecting plate 24, the top of the guide plate 31 is fixedly connected to the dust washing bin 32, and a dust collection pipe 33 is provided on the right side of the dust washing bin 32. The dust collection mechanism 3 also includes a water spray assembly 37. A fixing plate 34 is fixedly connected to the left side of the dust collection chamber 32. A reinforcing rib 35 is fixedly connected to the bottom of the fixing plate 34. The reinforcing rib 35 is fixedly connected to the left side of the dust collection chamber 32. A fan 36 is provided on the top of the fixing plate 34. The output end of the fan 36 is inserted into the slot on the left side of the dust collection chamber 32. A water spray assembly 37 is provided on the top of the dust collection chamber 32. The water spray assembly 37 is composed of a water pipe and two rows of atomizing nozzles.

[0033] Dust is drawn into the dust washing chamber 32 through the output end of the fan 36. The water spraying assembly 37 causes the drawn-in dust and water to combine to form a mud-water mixture, which falls downward onto the guide plate 31 and enters the mud storage chamber 113, thus improving adaptability.

[0034] Example 3

[0035] like Figure 1-8 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the collection mechanism 4 includes a collection drawer 42, a filter trough is provided on the top surface of the bottom plate 101 corresponding to the bottom of the mud storage bin 113, a mud collection bin 41 is provided on the right bottom of the filter trough of the bottom plate 101, the collection drawer 42 is slidably connected to the inner wall of the mud collection bin 41, a diversion bin 43 is fixedly connected to the bottom of the filter trough of the bottom plate 101, and a drain pipe 44 is fixedly connected to the bottom of the diversion bin 43. The fixing mechanism 5 includes a first support column 52, an extension plate 51 is fixedly connected to the middle outer wall of the bottom plate 101, the first support column 52 is fixedly connected to the bottom surface of the extension plate 51, a second support column 53 is fixedly connected to the left bottom surface of the bottom plate 101, a fixed base plate 54 is fixedly connected to the bottom surface of the second support column 53, and the fixed base plate 54 is fixedly connected to the first support column 52.

[0036] The device is fixed by using support column 1 52 and support column 2 53. The pressure plate 112 causes most of the water in the mud-water mixture to enter the diversion chamber 43 through the water filter tank and then be discharged through the drain pipe 44. The mud storage chamber 113 is pushed to the top of the mud collection chamber 41, and the mud that has been pressed by water inside falls down into the collection drawer 42.

[0037] The working principle of the dust removal device used in the production of this water-reducing agent will be explained in detail below.

[0038] like Figure 1-8 As shown, the device is fixed by using support column 1 52 and support column 2 53. Dust is drawn into the dust washing chamber 32 by the output end of the fan 36. The water spray assembly 37 causes the drawn-in dust and water to combine to form a mud-water mixture, which falls downward onto the guide plate 31 and enters the mud storage chamber 113. The output end of the motor 102 drives the connecting rod 105 on the side of the eccentric turntable 104 to make eccentric movement. When the eccentric movement reaches the leftmost position, the mud storage chamber 113 slides to align with the sleeve on the inner side of the support 103. The connecting rod 2 107 is lifted upward, which drives the bidirectional connecting rod 108 to be higher on the left and lower on the right. This causes the pressure plate 112 to press the mud-water mixture downward. At the same time, the extension of the protrusion 111 drives the baffle 21 to move downward. After the baffle 21 moves downward and the connecting plate 24 is in contact with the guide plate 31, the baffle continues to press down the spring 23. When pressed to its maximum extent, the pressure plate 112 is pressed down to the bottom; when the eccentric movement reaches the far right, the connecting rod 105 pushes the mud storage bin 113 to the right, while the connecting rod 207 moves downward, and the bidirectional connecting rod 108 moves from left to right, causing the pressure plate 112 to rise upward, and the baffle 21 to rise upward. As the spring 23 is compressed to its original state, the connecting plate 24 remains in contact. When the connecting rod 310 is raised to the top, the mud storage bin 113 slides to align with the sleeve inside the bracket 103, and the connecting plate 24 is raised, allowing the mud-water mixture to enter the mud storage bin 113. The pressure plate 112 is pressed down, causing most of the water in the mud-water mixture to enter the diversion bin 43 through the water filter tank and then be discharged through the drain pipe 44. The mud storage bin 113 is pushed to the top of the mud collection bin 41, and the mud inside, which has been pressed by water, falls downward into the collection drawer 42.

[0039] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A dust removal device for water reducing agent production, comprising a bottom plate (101), characterized in that: A motor (102) is provided on the top surface of the base plate (101). A bracket (103) is fixedly connected to the top surface of the base plate (101). The brackets (103) are symmetrically distributed. The rotating shaft fixedly connected to the output end of the motor (102) is fixedly connected to the back axis of the eccentric turntable (104). A connecting rod (105) is rotatably connected to the front of the eccentric turntable (104). A double hinge plate (106) is hinged to the right side of the connecting rod (105). The double hinge plate (106) is hinged to a connecting rod (107) provided on the right side of the connecting rod (105). The connecting rod (107) is "L" shaped. A bidirectional connecting rod (108) is hinged to the top of the bidirectional connecting rod (108). A connecting shaft (109) is rotatably connected to the inner wall of the middle part of the bidirectional connecting rod (108). The connecting shaft (109) is fixedly connected inside the two brackets (103). On the side, a protruding column (111) is rotatably connected to the inner wall of the right side of the bidirectional connecting rod (108). The bidirectional connecting rod (108) is divided into two sections, with one section at the top and one at the rear of the right half, connected by a connecting shaft (109). A connecting rod three (110) is provided on the inner wall of the right side of the bidirectional connecting rod (108). The connecting rod three (110) is fixedly connected to the protruding column (111). A pressure plate (112) is hinged to the bottom of the connecting rod three (110). A mud storage bin (113) is provided outside the pressure plate (112). The mud storage bin (113) is fixedly connected to the double hinge plate (106). The bottom of the mud storage bin (113) is hollow. The mud storage bin (113) is slidably connected to the top surface of the base plate (101). A dust collection mechanism (3) is provided on the back of the mud storage bin (113). A collection mechanism (4) is provided at the bottom of the base plate (101). It also includes a volume control mechanism (2), a dust suction mechanism (3), a collection mechanism (4), and a fixing mechanism (5). The volume control mechanism (2) is used to control the entry of mud and water; the dust suction mechanism (3) is used to settle dust; the collection mechanism (4) is used to discharge mud and water; and the fixing mechanism (5) is used to fix the device.

2. The dust removal device for water reducing agent production of claim 1, characterized in that: The control mechanism (2) includes a spring (23), a baffle (21) is fixedly connected to the side of the protrusion (111), a slide plate (22) is slidably connected to the side of the baffle (21), the bottom surface of the baffle (21) is fixedly connected to the spring (23), a connecting plate (24) is fixedly connected to the bottom of the spring (23), the bottom of the connecting plate (24) is inclined from the upper right to the lower left, and the slide plate (22) extends downward to completely cover the spring (23).

3. The dust removal device for water reducing agent production of claim 1, characterized in that: The dust collection mechanism (3) includes a guide plate (31), a sleeve is provided on the top of the mud storage bin (113), the sleeve is fixedly connected to the bracket (103), the sleeve is slidably connected to the mud storage bin (113), the guide plate (31) is fixedly connected to the back of the sleeve, the bottom inner wall of the guide plate (31) is a slope from the upper right to the lower left and fits against the bottom of the connecting plate (24), the top of the guide plate (31) is fixedly connected to the dust washing bin (32), and a dust collection pipe (33) is provided on the right side of the dust washing bin (32).

4. The dust removal device for water reducing agent production of claim 3, characterized in that: The dust collection mechanism (3) also includes a water spray assembly (37). A fixing plate (34) is fixedly connected to the left side of the dust collection chamber (32). A reinforcing rib (35) is fixedly connected to the bottom of the fixing plate (34). The reinforcing rib (35) is fixedly connected to the left side of the dust collection chamber (32). A fan (36) is provided on the top of the fixing plate (34). The output end of the fan (36) is inserted into the slot on the left side of the dust collection chamber (32). A water spray assembly (37) is provided on the top of the dust collection chamber (32). The water spray assembly (37) is composed of a water pipe and two rows of atomizing nozzles.

5. The dust removal device for water reducing agent production of claim 1, characterized in that: The collection mechanism (4) includes a collection drawer (42). A water filter trough is provided on the top surface of the bottom plate (101) corresponding to the bottom of the mud storage bin (113). A mud collection bin (41) is provided on the bottom right side of the water filter trough of the bottom plate (101). A collection drawer (42) is slidably connected to the inner wall of the mud collection bin (41). A diversion bin (43) is fixedly connected to the bottom of the water filter trough of the bottom plate (101). A drain pipe (44) is fixedly connected to the bottom of the diversion bin (43).

6. A dust removal device for water-reducing agent production according to claim 1, characterized in that: The fixing mechanism (5) includes a first support column (52), an extension plate (51) is fixedly connected to the outer wall of the middle part of the base plate (101), the first support column (52) is fixedly connected to the bottom surface of the extension plate (51), the second support column (53) is fixedly connected to the bottom left side of the base plate (101), and a fixed base plate (54) is fixedly connected to the bottom surface of the second support column (53). The fixed base plate (54) is fixedly connected to the first support column (52).

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