A municipal sludge regeneration and resource treatment device

Abstract

The present invention relates to the technical field of sludge pyrolysis treatment, and specifically to a municipal sludge recycling and resource treatment device, comprising an outer sleeve, a stirring roller, an adjusting mechanism, and a screw feeder. A heating chamber is provided on the outer wall of the outer sleeve, and docking ports are provided at both ends of the heating chamber, and the docking ports are connected to an external air heating device. An air outlet valve is installed on the upper side of one end of the inner wall of the outer sleeve. In the present invention, through the arrangement of the stirring roller and the adjusting mechanism, when the central roller rod rotates, the material is driven to move from the other end of the outer sleeve to one end through a plurality of stirring blades, and then the material is discharged from the discharge port. The external air heating device heats the outer sleeve by introducing high-temperature gas into the heating chamber and the stirring roller, thereby heating the material in the outer sleeve, and heating the center position of the material through the stirring roller, thereby improving the heating efficiency of the material.

Description

Technical Field

[0001] The invention relates to the technical field of sludge pyrolysis treatment, in particular to a municipal sludge regeneration and resource treatment device. Background Art

[0002] Heating sludge can decompose some organic matter and hydrolyze hydrophilic organic colloids. It also decomposes and destroys microorganisms in the sludge, freeing water from cell membranes, thereby improving sludge concentration and dewatering performance. Heat treatment is particularly effective for activated sludge with poor dewatering properties. Thermochemical treatment of sludge offers advantages such as rapid processing, small footprint, harmlessness, volume reduction, and significant resource utilization. Heating causes chemical reactions in the organic matter in the sludge, oxidizing toxic and harmful pollutants and killing pathogenic microorganisms. Heating also destroys the cell structure, releasing and removing internal water from the sludge. Closed-circuit heating allows the sludge to be heated in an anaerobic environment, thereby preserving its calorific value and facilitating its recycling. Existing horizontal continuous sludge heating devices often use external heating combined with internal stirring to achieve closed-circuit heating. This results in low heating efficiency and a tendency for sludge crusting to form on the cylinder wall, hindering heating of the material. Summary of the Invention

[0003] The purpose of the present invention is to provide a municipal sludge recycling and resource treatment device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A municipal sludge recycling and resource treatment device, comprising:

[0006] Outer sleeve: A heating chamber is provided on the outer wall, and docking ports are provided at both ends of the heating chamber, and the docking ports are connected to the external air heating equipment. An air outlet valve is installed on the upper side of one end of the inner wall of the outer sleeve, and a discharge port is installed on the lower side of one end of the inner wall of the outer sleeve;

[0007] Stirring roller: used to mix and convey materials. The stirring roller is located on the inner side of the outer sleeve and is rotatably connected to the outer sleeve. The stirring roller includes a central roller rod. A plurality of stirring blades are detachably mounted on the outer wall of the central roller rod. A driving module is provided on the inner wall of the central roller rod. The plurality of stirring blades are arranged in a spiral shape.

[0008] Adjustment mechanism: There are two adjustment mechanisms, which are respectively arranged at both ends of the stirring roller. The adjustment mechanism is used to drive the driving module to adjust the deflection angle of the stirring blade;

[0009] Screw feeder: fixedly installed at the other end of the outer sleeve, the screw feeder is used to add materials into the outer sleeve.

[0010] Furthermore, the outer wall of the central roller rod is fixedly connected to the position of the stirring blade corresponding to the stirring blade, an air duct is opened on the inner side of the stirring blade, the bottom end of the stirring blade is fixedly connected to two docking holes, the two docking holes are located on opposite sides of the stirring blade, the docking holes are fixedly connected to the air duct, the bottom end of the stirring blade is rotatably connected to a mounting seat, the mounting seat is used to be fixedly connected to the central roller rod by bolts, and the air duct is slidably connected to the inner wall of the adjacent docking hole.

[0011] Furthermore, one end of the central roller rod is rotatably connected to an annular seat 2, and the other end of the central roller rod is rotatably connected to an annular seat 1, and both the annular seat 1 and the annular seat 2 are connected to the inner wall of the central roller rod.

[0012] Furthermore, a partition plate is fixedly sleeved on the outer side wall of the driving module at equal intervals, and a plurality of the driving modules correspond to a plurality of stirring blades in a one-to-one manner, and the partition plate is used to separate two adjacent ventilation pipes.

[0013] Furthermore, the bottom end of the mounting seat is fixedly connected to a limiting rod, the outer wall of the limiting rod is provided with a limiting groove, three groove rods are fixedly connected between the multiple partition plates, the groove rods are slidably connected to the limiting rod, and a plurality of protrusions are equidistantly fixed to the inner wall of one side of the groove rod.

[0014] Furthermore, a venting portion is provided at the middle position of the end of the stirring blade, and contact portions are provided at both sides of the end of the stirring blade.

[0015] Furthermore, the adjustment mechanism includes a fixed seat, a track disk is provided at the top of the fixed seat, and external protrusions are provided on both sides of one side wall of the track disk, an end disk is provided on one side of the track disk, and a sleeve is fixedly sleeved on the other side of the track disk, a round rod is slidably inserted into one side of the end disk, and the round rod and the sleeve are rotatably connected, rollers are rotatably connected on both sides of one side wall of the end disk, and the other side of the end disk is slidably inserted into the end of the driving rod.

[0016] Furthermore, the sleeve is rotatably connected to the fixing seat, and a deflection module is provided on one side of the fixing seat.

[0017] Furthermore, the deflection module includes a fixed ring seat, which is fixedly connected to the fixed seat, and the inner side wall of the fixed ring seat is rotatably connected to a rotating ring, one side of the inner wall of the rotating ring is fixedly connected to a helical gear ring, and the other side of the inner side wall of the rotating ring is fixedly connected to a straight gear ring, one end of the round rod is fixedly connected to a bevel gear, and the bevel gear is meshed with the helical gear ring, one end of the track disk is fixedly sleeved with a transmission gear three, the top end of the fixed seat is rotatably connected to a shaft rod, one end of the shaft rod is fixedly sleeved with a transmission gear one and a transmission gear two, the transmission gear one is meshed with the inner wall of the spur gear ring, and the transmission gear three is meshed with the transmission gear two.

[0018] Furthermore, flange plates are detachably fixedly connected to both ends of the central roller rod, and the flange plates are slidably plugged into the end portions of the driving rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the setting of the stirring roller and the adjustment mechanism, the material is conveyed into the outer sleeve through the screw feeder. The external motor drives the central roller to rotate through the belt. When the central roller rotates, it drives the material from the other end of the outer sleeve to one end through multiple stirring blades. Then the material is discharged from the discharge port. The external air heating equipment heats the outer sleeve by passing high-temperature gas into the heating chamber and the stirring roller, thereby heating the material in the outer sleeve. The center position of the material is heated by the stirring roller, thereby improving the heating efficiency of the material.

[0021] 2. Through the setting of the adjustment mechanism, the driving rod moves forward and backward along its own axis when it rotates, and the convex block squeezes the limit groove when the driving rod moves forward, thereby driving the stirring blade to rotate around the limit rod, so that the inclination angle of the stirring blade increases, thereby increasing the gap between the contact part and the inner wall of the outer sleeve, thereby causing the contact part to disengage from the inner wall of the outer sleeve. When the driving rod moves backward, the convex block relaxes the squeezing of the adjacent convex block, so that the stirring blade rotates under the resistance of the material, and the contact part fits the inner wall of the outer sleeve when the stirring blade rotates, thereby cleaning the sludge scab on the inner wall of the outer sleeve. The reciprocating rotation of the stirring blade during the revolution of the stirring blade can realize intermittent cleaning of the inner wall of the outer sleeve, while reducing the friction between the stirring blade and the inner wall of the outer sleeve, the sludge scab on the inner wall of the outer sleeve can be cleaned, thereby facilitating the heating of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the stirring roller in the present invention;

[0024] Figure 3This is a schematic diagram of the structure of the driving module in the present invention;

[0025] Figure 4 It is a schematic diagram of the stirring blade structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the stirring blade in the present invention;

[0027] Figure 6 Schematic diagram of the groove rod structure of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the regulating mechanism in the present invention;

[0029] Figure 8 It is a schematic diagram of the cross-sectional structure of the adjustment mechanism in the present invention.

[0030] In the figure: 100, outer sleeve; 110, air outlet valve; 120, discharge port; 130, heating chamber; 200, stirring roller; 210, center roller rod; 211, vent pipe; 212, annular seat 1; 213, annular seat 2; 220, stirring blade; 221, air channel; 222, docking hole; 223, mounting seat; 224, limiting rod; 225, limiting groove; 226, contact portion; 227, venting portion; 230, flange plate; 240, drive module; 241, drive rod; 242, partition plate; 243. Groove rod; 244. Bump; 300. Adjustment mechanism; 310. Fixed seat; 320. Sleeve; 330. Track disk; 331. Outer convex portion; 340. End disk; 341. Roller; 342. Round rod; 350. Deflection module; 351. Fixed ring seat; 352. Rotating ring; 353. Helical gear ring; 354. Straight gear ring; 355. Bevel gear; 356. Shaft; 357. Transmission gear 1; 358. Transmission gear 2; 359. Transmission gear 3; 400. Screw feeder. DETAILED DESCRIPTION

[0031] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1 to 6In an embodiment of the present invention, a municipal sludge recycling and resource processing device includes an outer sleeve 100, a stirring roller 200, an adjusting mechanism 300, and a screw feeder 400. A heating chamber 130 is provided on the outer wall of the outer sleeve 100. Both ends of the heating chamber 130 are provided with docking ports, and the docking ports are connected to the external air heating equipment. An air outlet valve 110 is installed on the upper side of one end of the inner wall of the outer sleeve 100, and a discharge port 120 is installed on the lower side of one end of the inner wall of the outer sleeve 100. The stirring roller 200 is used to mix and transport the materials. The stirring roller 200 is located on the inner side of the outer sleeve 100, and the stirring roller 200 is connected to the outer sleeve. 100 are rotatably connected, the stirring roller 200 includes a central roller rod 210, and a plurality of stirring blades 220 are detachably installed on the outer wall of the central roller rod 210. The inner wall of the central roller rod 210 is provided with a driving module 240, and the plurality of stirring blades 220 are spirally arranged. There are two adjusting mechanisms 300, and the two adjusting mechanisms 300 are respectively arranged at both ends of the stirring roller 200. The adjusting mechanisms 300 are used to drive the driving module 240 to adjust the deflection angle of the stirring blades 220. The screw feeder 400 is fixedly installed at the other end of the outer sleeve 100, and the screw feeder 400 is used to add materials into the outer sleeve 100.

[0033] Specifically, the material is transported into the outer sleeve 100 through the screw feeder 400, and the external motor drives the center roller 210 to rotate through the belt. When the center roller 210 rotates, it drives the material from the other end of the outer sleeve 100 to one end through multiple stirring blades 220, and then the material is discharged from the discharge port 120. The external air heating equipment heats the outer sleeve 100 by introducing high-temperature gas into the heating chamber 130, thereby heating the material in the outer sleeve 100, and performing closed thermal decomposition and drying of the material, and the decomposed gas is discharged from the outlet valve 110.

[0034] Example 1

[0035] like Figures 3 to 6As shown, in this embodiment, the outer wall of the central roller rod 210 corresponding to the position of the stirring blade 220 is fixedly connected with a vent pipe 211, the inner side of the stirring blade 220 is provided with an air channel 221, the bottom end of the stirring blade 220 is fixedly connected with two docking holes 222, the two docking holes 222 are located on the opposite sides of the stirring blade 220, the docking holes 222 are fixedly connected with the air channel 221, the bottom end of the stirring blade 220 is rotatably connected with a mounting seat 223, the mounting seat 223 is used to be fixedly connected to the central roller rod 210 by bolts, the vent pipe 211 is slidably connected to the inner wall of the adjacent docking hole 222, one end of the central roller rod 210 is rotatably connected to the annular seat 213, the other end of the central roller rod 210 is rotatably connected to the annular seat 1 212, the annular seat 1 212 The annular seat 213 is connected to the inner wall of the central roller rod 210, and the outer wall of the driving module 240 is equidistantly fixed with a partition plate 242. There is a one-to-one correspondence between multiple driving modules 240 and multiple stirring blades 220. The partition plate 242 is used to separate two adjacent vent pipes 211. The bottom end of the mounting seat 223 is fixedly connected to the limiting rod 224, and the outer wall of the limiting rod 224 is provided with a limiting groove 225. Three groove rods 243 are fixedly connected between the multiple partition plates 242. The groove rod 243 is slidably connected to the limiting rod 224, and a plurality of protrusions 244 are equidistantly fixed to the inner wall of one side of the groove rod 243. A vent portion 227 is provided in the middle position of the end of the stirring blade 220, and contact portions 226 are provided on both sides of the end of the stirring blade 220.

[0036] In this embodiment, the annular seat 1 212 and the annular seat 213 are both connected to an external air heating device, so that hot air is introduced into the central roller 210, and the two adjacent air pipes 211 are separated by the partition plate 242, so that the air channels 221 in the multiple stirring blades 220 are in a series state, so that the hot air enters from one end of the central roller 210 and passes through the multiple stirring blades 220 in sequence and is discharged from the other end of the central roller 210, thereby heating the stirring blades 220. When the stirring blades 220 rotate to move and stir the material, the stirring blades 220 further heat the material, thereby improving the heating efficiency and uniformity of the material. Through the setting of the adjustment mechanism 300, the driving rod 241 moves back and forth along its own axis when rotating, and squeezes the limiting groove 225 through the protrusion 244 when the driving rod 241 moves forward, thereby driving The stirring blade 220 rotates around the limit rod 224, so that the inclination angle of the stirring blade 220 increases, thereby increasing the gap between the contact portion 226 and the inner wall of the outer sleeve 100, thereby causing the contact portion 226 to disengage from the inner wall of the outer sleeve 100. When the driving rod 241 moves backward, the protrusion 244 relaxes the squeezing of the adjacent protrusion 244, so that the stirring blade 220 rotates under the resistance of the material (because the material is pushed from front to back in the outer sleeve 100, the density and resistance of the material gradually increase from front to back, so that when the stirring blade 220 revolves, the resistance of the rear half of the stirring blade 220 is greater than the resistance of the front half, so that the stirring blade 220 rotates under the resistance of the material when the stirring blade 220 revolves). When the stirring blade 220 rotates, the contact portion 226 fits against the inner wall of the outer sleeve 100, thereby cleaning the sludge crusted on the inner wall of the outer sleeve 100. By causing the stirring blade 220 to rotate back and forth during its revolution, the inner wall of the outer sleeve 100 is intermittently cleaned, reducing the friction between the stirring blade 220 and the inner wall of the outer sleeve 100, and cleaning the sludge scabs on the inner wall of the outer sleeve 100, thereby facilitating the heating of the material.

[0037] Example 2

[0038] like Figures 7-8As shown, in this embodiment, the adjustment mechanism 300 includes a fixed seat 310, a track disk 330 is provided at the top of the fixed seat 310, and outer protrusions 331 are provided on both sides of one side wall of the track disk 330, an end plate 340 is provided on one side of the track disk 330, and a sleeve 320 is fixedly sleeved on the other side of the track disk 330, a round rod 342 is slidably inserted into one side of the end plate 340, and the round rod 342 and the sleeve 320 are rotatably connected, rollers 341 are rotatably connected on both sides of one side wall of the end plate 340, and the other side of the end plate 340 is slidably inserted into the end of the driving rod 241, and the sleeve 320 is rotatably connected to the fixed seat 310, and a deflection module 350 is provided on one side of the fixed seat 310, and the deflection module 350 includes a fixed ring seat 351, and the fixed ring seat 351 is fixedly connected to the fixed seat 310 The inner wall of the fixed ring seat 351 is rotatably connected to the rotating ring 352, one side of the inner wall of the rotating ring 352 is fixedly connected to the bevel gear ring 353, and the other side of the inner wall of the rotating ring 352 is fixedly connected to the straight gear ring 354. One end of the round rod 342 is fixedly connected to the bevel gear 355, which is meshed with the bevel gear 355 and the bevel gear 353. One end of the track disk 330 is fixedly sleeved with a transmission gear three 359, and the top of the fixed seat 310 is rotatably connected to the shaft rod 356, one end of the shaft rod 356 is fixedly sleeved with a transmission gear one 357 and a transmission gear two 358, the transmission gear one 357 is meshed with the inner wall of the straight gear ring 354, and the transmission gear three 359 is meshed with the transmission gear two 358. The two ends of the center roller rod 210 are detachably fixedly connected with the flange plate 230, and the flange plate 230 is slidably plugged into the end position of the driving rod 241.

[0039] During specific implementation, the driving rod 241 rotates to drive the end plate 340 to rotate. Through the setting of the outer protrusion 331, the end plate 340 rotates relative to the track plate 330 while the end plate 340 moves back and forth. When the end plate 340 revolves, it drives the round rod 342 to rotate. The round rod 342 drives the bevel gear ring 353 to rotate through the bevel gear 355. The bevel gear ring 353 drives the straight gear ring 354 to rotate through the rotating ring 352. The straight gear ring 354 drives the transmission gear 1 357 to rotate. The transmission gear 1 357 drives the transmission gear 2 358 to rotate through the shaft 356. The transmission gear 2 358 drives the sleeve 320 to rotate through the transmission gear 359, thereby driving the track plate 330 to rotate. When the driving rod 241 rotates, the track plate 330 is driven to rotate in the opposite direction, thereby changing the position of the outer protrusion 331, so that the stirring blade 220 rotates at different positions, avoiding the stirring blade 220 repeatedly scraping the same position of the inner wall of the outer sleeve 100.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A municipal sludge recycling and resource treatment device, characterized in that: include: An outer sleeve (100): a heating chamber (130) is provided on the outer wall, and docking ports are provided at both ends of the heating chamber (130), and the docking ports are connected to an external air heating device. An air outlet valve (110) is installed on the upper side of one end of the inner wall of the outer sleeve (100), and a discharge port (120) is installed on the lower side of one end of the inner wall of the outer sleeve (100); A stirring roller (200): used for mixing and conveying materials, the stirring roller (200) is located on the inner side of the outer sleeve (100), and the stirring roller (200) is rotatably connected to the outer sleeve (100). The stirring roller (200) includes a central roller rod (210), and a plurality of stirring blades (220) are detachably mounted on the outer side wall of the central roller rod (210). A driving module (240) is provided on the inner wall of the central roller rod (210). The plurality of stirring blades (220) are arranged in a spiral shape. The bottom end of the stirring blade (220) is rotatably connected to a mounting seat (223), and the mounting seat (223) is used to be fixedly connected to the central roller rod (210) by bolts. Adjustment mechanisms (300): There are two adjustment mechanisms (300), which are respectively arranged at both ends of the stirring roller (200). The adjustment mechanisms (300) are used to drive the driving module (240) to adjust the deflection angle of the stirring blade (220); A screw feeder (400): fixedly mounted on the other end of the outer sleeve (100), the screw feeder (400) is used to add materials into the outer sleeve (100); The outer side wall of the driving module (240) is fixedly sleeved with a partition plate (242) at equal intervals, and the plurality of driving modules (240) correspond one to one to the plurality of stirring blades (220); The bottom end of the mounting seat (223) is fixedly connected to a limiting rod (224), and the outer wall of the limiting rod (224) is provided with a limiting groove (225). Three groove rods (243) are fixedly connected between the plurality of partition plates (242). The groove rods (243) are slidably connected to the limiting rod (224), and a plurality of protrusions (244) are fixedly connected to the inner wall of one side of the groove rod (243) at equal intervals. A venting portion (227) is provided at the middle position of the end of the stirring blade (220), and contact portions (226) are provided at both sides of the end of the stirring blade (220); by setting the adjustment mechanism (300), the driving rod (241) moves forward and backward along its own axis direction when rotating, and when the driving rod (241) moves forward, the protrusion (244) squeezes the limiting groove (225), thereby driving the stirring blade (220) to rotate around the limiting rod (224), so that the inclination angle of the stirring blade (220) increases. When the driving rod (241) moves backward, the protrusion (244) relaxes the squeezing of the adjacent protrusion (244), so that the stirring blade (220) rotates under the resistance of the material.

2. A municipal sludge recycling and resource treatment device according to claim 1, characterized in that: The outer wall of the central roller (210) is fixedly connected to the position of the stirring blade (220) with a vent pipe (211), the inner side of the stirring blade (220) is provided with an air passage (221), the bottom end of the stirring blade (220) is fixedly connected to two docking holes (222), the two docking holes (222) are located on opposite sides of the stirring blade (220), the docking holes (222) are fixedly connected to the air passage (221), and the vent pipe (211) is slidably connected to the inner wall of the adjacent docking hole (222).

3. A municipal sludge recycling and resource treatment device according to claim 2, characterized in that: One end of the central roller rod (210) is rotatably connected to an annular seat 2 (213), and the other end of the central roller rod (210) is rotatably connected to an annular seat 1 (212). Both the annular seat 1 (212) and the annular seat 2 (213) are in communication with the inner wall of the central roller rod (210).

4. A municipal sludge recycling and resource treatment device according to claim 2, characterized in that: The partition plate (242) is used to separate two vent pipes (211) located adjacent to each other.

5. The municipal sludge recycling and resource treatment device according to claim 4 is characterized in that: The adjustment mechanism (300) comprises a fixing seat (310), a track disc (330) is provided at the top end of the fixing seat (310), and outer protrusions (331) are provided on both sides of a side wall of the track disc (330), an end disc (340) is provided on one side of the track disc (330), a sleeve (320) is fixedly sleeved on the other side of the track disc (330), a round rod (342) is slidably inserted into one side of the end disc (340), and the round rod (342) is rotatably connected to the sleeve (320), and rollers (341) are rotatably connected to both sides of a side wall of the end disc (340), and the other side of the end disc (340) is slidably inserted into the end of the driving rod (241).

6. The municipal sludge recycling and resource treatment device according to claim 5, characterized in that: The sleeve (320) is rotatably connected to the fixing seat (310), and a deflection module (350) is provided on one side of the fixing seat (310).

7. A municipal sludge recycling and resource treatment device according to claim 6, characterized in that: The deflection module (350) includes a fixed ring seat (351), the fixed ring seat (351) is fixedly connected to the fixed seat (310), the inner side wall of the fixed ring seat (351) is rotatably connected to a rotating ring (352), one side of the inner wall of the rotating ring (352) is fixedly connected to a helical gear ring (353), the other side of the inner side wall of the rotating ring (352) is fixedly connected to a straight gear ring (354), one end of the round rod (342) is fixedly connected to a bevel gear (355), the bevel gear (355) is fixedly connected to the inner side wall of the rotating ring (352). ) is meshed with the bevel gear ring (353), one end of the track disk (330) is fixedly sleeved with a transmission gear three (359), the top end of the fixed seat (310) is rotatably connected to a shaft (356), one end of the shaft (356) is fixedly sleeved with a transmission gear one (357) and a transmission gear two (358), the transmission gear one (357) is meshed with the inner wall of the straight gear ring (354), and the transmission gear three (359) is meshed with the transmission gear two (358).

8. The municipal sludge recycling and resource treatment device according to claim 6, characterized in that: Flange plates (230) are detachably fixedly connected to both ends of the central roller rod (210), and the flange plates (230) are slidably plugged into the end portions of the driving rod (241).

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