A kiln gas multi-stage filtering collection device
By designing a multi-stage kiln gas filtration and collection device, and utilizing cooling, filtration, and cleaning mechanisms, the problem of caking caused by the combination of water vapor and solid particles in the kiln gas was solved. This achieved effective cooling and purification of the kiln gas, simplified the cleaning process, and improved purification efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUANCHENG TONGHAI CALCIUM CARBONATE CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-09
AI Technical Summary
The kiln gas from quicklime calcination contains water vapor, which easily combines with solid particles, causing the filter layer to clump together, making it difficult to clean and affecting subsequent purification treatment.
Design a multi-stage kiln gas filtration and collection device, including cooling, filtration, cleaning and recovery mechanisms. After cooling by the cooling module, the filtration mechanism separates large particles, and the vibration and knocking cleaning module achieves automatic cleaning and recovery of purified gas.
It achieves effective cooling and purification of kiln gas, avoids filter layer caking, simplifies the cleaning process, and improves purification efficiency.
Smart Images
Figure CN224340725U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas treatment technology, specifically to a collection device for multi-stage filtration of kiln gas. Background Technology
[0002] The production processes of calcium carbonate are mainly divided into two types: natural ore processing (using limestone, calcite, etc. as raw materials) and chemical synthesis (such as carbonation). The carbonation reaction in the carbonation method involves the chemical principle of Ca(OH)₂ + CO₂ → CaCO₃↓ + H₂O. In the carbonation process for calcium carbonate production, the kiln gas rich in carbon dioxide produced during the calcination of quicklime is often used as the carbonation gas source; however, the kiln gas contains a large amount of particulate matter and needs to be purified before it can be used as a carbonation gas source in production.
[0003] For example, Chinese patent CN222336094U discloses a kiln flue gas treatment device. This device filters solid particles in the flue gas and then flexibly adjusts the catalytic solution to recover the gas in the flue gas.
[0004] However, the kiln gas from calcining quicklime contains a certain amount of water vapor. If it is treated directly, the water vapor will easily combine with the solid particles in the gas, causing the solid particles to clump together on the filter layer, making it difficult to clean later.
[0005] Based on this, the present invention designs a kiln gas multi-stage filtration collection device to solve the above problems. Utility Model Content
[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a kiln gas multi-stage filtration and collection device.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A kiln gas multi-stage filtration and collection device includes a filtration mechanism, a cleaning mechanism, a recovery mechanism, and a cooling mechanism.
[0009] The cooling mechanism includes a cooling module and a control module, with the control module installed inside the cooling module; the cooling module is connected to the filtration mechanism, and the filtration mechanism is connected to the recovery mechanism; the air outlet of the cooling module is connected to the air inlet of the filtration mechanism, and the air outlet of the filtration mechanism is connected to the air inlet of the recovery mechanism.
[0010] The filtration mechanism is equipped with a cleaning mechanism; the cleaning mechanism includes a vibration cleaning module and a knocking dust removal module; the filtration mechanism is equipped with a vibration cleaning module and multiple sets of knocking dust removal modules, and the multiple sets of knocking dust removal modules are connected to the vibration cleaning module.
[0011] Furthermore, the cooling module includes a cooling tank, cooling pipes, a collection hopper, and a drain valve. The cooling pipes are fixedly installed on the upper side of the cooling tank; the cooling pipes are filled with circulating coolant transported by a pump; the collection hopper is fixedly installed on the lower side of the cooling pipes; and the drain valve is fixedly installed at the bottom of the collection hopper.
[0012] Furthermore, the control module includes a moving module and a connecting module. The moving module is installed on the upper side of the collection hopper, and the connecting module is installed on the inner wall of the collection hopper.
[0013] Furthermore, the mobile module includes a rotating frame, a float, and a pressure block. The middle part of the rotating frame is rotatably installed inside the collection hopper, the lower end of the rotating frame is fixedly installed with a float, and the upper end of the rotating frame is fixedly installed with a pressure block.
[0014] Furthermore, the conductive module includes an elastic shell, a movable plate, a slide rod, a second spring, and a conductive block. The elastic shell is fixedly installed on the inner wall of the collection hopper. The movable plate is fixedly installed in the middle of the inner wall of the elastic shell. The slide rod is fixedly installed on the movable plate and is slidably connected to the collection hopper. The slide rod is fitted with a second spring, and the two ends of the second spring are fixedly connected to the movable plate and the collection hopper, respectively. A conductive block is fixedly installed on the movable plate and the collection hopper, respectively. The conductive blocks are electrically connected to the controller of the discharge valve.
[0015] Furthermore, the filtration mechanism includes an inlet pipe, an outlet pipe, a treatment box, a spiral guide plate, a central pipe, and an ash hopper. One end of the inlet pipe is fixedly connected to the outlet of the cooling box, and the other end of the inlet pipe is fixedly connected to the inlet of the treatment box. A spiral guide plate is fixedly installed on the inner wall of the treatment box. A central pipe is fixedly installed on the upper side inside the treatment box. An outlet pipe communicating with the central pipe is fixedly installed on the upper side of the treatment box. An ash hopper is fixedly installed on the lower side of the treatment box.
[0016] Furthermore, the vibration cleaning module includes a movable frame, guide columns, a first spring, and a filter screen. An installation groove is provided on the inner wall of the central pipe, and guide columns are uniformly fixedly installed in a circular array within the installation groove. The movable frame is slidably connected to multiple guide columns. A filter screen is fixedly installed in the middle of the movable frame. A first spring is sleeved on the guide columns. The two ends of the first spring are fixedly connected to the movable frame and the installation groove, respectively.
[0017] Furthermore, the knocking dust removal module includes a rotating arm, a knocking block, and a pull rope. The upper end of the rotating arm is rotatably mounted on the inner wall of the central pipe, and the lower end of the rotating arm is fixedly mounted with the knocking block. The middle part of the rotating arm is fixedly connected to one end of the pull rope, and the other end of the pull rope is fixedly connected to the moving frame.
[0018] Compared with the prior art, the advantages of this utility model are as follows: Kiln gas is transported to a cooling module, where it is cooled, and the water vapor in the gas is collected after cooling. A control module monitors the collected cooling water level, and once a certain level is reached, the collected cooling water is discharged. After the water vapor in the kiln gas is cooled, the remaining gas is transported to a filtration mechanism, where large particles settle, and smaller particles are filtered by a vibration cleaning module and then transported to a recovery mechanism. The recovery mechanism recovers and processes the remaining gas. During the cleaning process, dust accumulates on the underside of the vibration cleaning module, clogging it. Airflow then moves the vibration cleaning module, simultaneously moving the knocking cleaning module. This coordination between the vibration cleaning module and the airflow causes the vibration cleaning module to vibrate after shutdown, enabling self-cleaning. Simultaneously, the vibration cleaning module drives the knocking cleaning module to knock down the dust adhering to the filter mechanism, thus achieving automatic cleaning of both the vibration cleaning module and the filter mechanism. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This utility model relates to a three-dimensional kiln gas multi-stage filtration and collection device. Figure 1 ;
[0021] Figure 2 This is a front view of a kiln gas multi-stage filtration and collection device according to the present invention;
[0022] Figure 3 This is a left view of a kiln gas multi-stage filtration and collection device according to the present invention.
[0023] Figure 4 For along Figure 3 A three-dimensional view after part of the structure has been removed along the AA direction;
[0024] Figure 5 for Figure 4 Enlarged view of point B in the middle;
[0025] Figure 6 This is a front sectional view of the processing box and its connecting structure;
[0026] Figure 7 for Figure 6 Enlarged view of point C in the middle.
[0027] The labels in the diagram represent:
[0028] 1. Filtration mechanism; 11. Inlet pipe; 12. Outlet pipe; 13. Processing box; 14. Spiral guide plate; 15. Central pipe; 16. Ash hopper; 2. Cleaning mechanism; 21. Vibration cleaning module; 211. Mounting slot; 212. Moving frame; 213. Guide column; 214. First spring; 215. Filter screen; 22. Tapping dust removal module; 221. Rotating arm; 222. Tapping block; 223. Pull rope; 3. Recycling mechanism; 31. Diversion 32. Valve; 33. Diversion pipe; 34. Carbon dioxide recovery device; 45. Sulfur dioxide concentration detector; 46. Cooling mechanism; 47. Cooling module; 48. Cooling box; 49. Cooling pipe; 40. Collection hopper; 41. Discharge valve; 42. Control module; 43. Rotating frame; 44. Float; 45. Pressure block; 46. Elastic shell; 47. Moving plate; 48. Slide rod; 49. Second spring; 40. Conductive block. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0030] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.
[0031] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-4 and Figure 6 A kiln gas multi-stage filtration collection device includes a filtration mechanism 1, a cleaning mechanism 2, a recovery mechanism 3, and a cooling mechanism 4.
[0032] The cooling mechanism 4 includes a cooling module 41 and a control module 42. The control module 42 is installed inside the cooling module 41. The cooling module 41 is connected to the filter mechanism 1, and the filter mechanism 1 is connected to the recovery mechanism 3. The air outlet of the cooling module 41 is connected to the air inlet of the filter mechanism 1, and the air outlet of the filter mechanism 1 is connected to the air inlet of the recovery mechanism 3.
[0033] The filter mechanism 1 is equipped with a cleaning mechanism 2; the cleaning mechanism 2 includes a vibration cleaning module 21 and a knocking dust removal module 22; the filter mechanism 1 is equipped with a vibration cleaning module 21 and multiple sets of knocking dust removal modules 22, and the multiple sets of knocking dust removal modules 22 are connected to the vibration cleaning module 21.
[0034] In this embodiment, when the kiln gas multi-stage filtration collection device is working normally, the kiln gas is transported to the cooling module 41, where it is cooled to collect the water vapor. The control module 42 monitors the water level of the collected cooling water, and once the water level reaches a certain height, the collected cooling water in the cooling module 41 is discharged. After the water vapor in the kiln gas is cooled, the remaining gas is transported to the filtration mechanism 1, where large particles settle. Smaller particles are then filtered by the vibration cleaning module 21 and transported to the recovery mechanism 3. The recovery mechanism 3 then processes the remaining gas... Recycling and processing: During the cleaning process, dust accumulates on the lower side of the vibration cleaning module 21, and the dust blocks the vibration cleaning module 21. At this time, the airflow drives the vibration cleaning module 21 to move, thereby synchronously driving the knocking dust removal module 22 to move. Through the cooperation of the vibration cleaning module 21 and the airflow, the vibration cleaning module 21 moves, so that after the machine stops, the vibration cleaning module 21 vibrates, enabling the vibration cleaning module 21 to perform self-cleaning. At the same time, the vibration cleaning module 21 drives the knocking dust removal module 22 to knock on the filter mechanism 1, causing the dust attached to the tube wall of the filter mechanism 1 to fall off, thereby realizing the automatic cleaning of the vibration cleaning module 21 and the filter mechanism 1.
[0035] Example 2: In some embodiments, as a preferred embodiment of this utility model, such as Figures 1-5 As shown, the cooling module 41 includes a cooling tank 411, a cooling pipe 412, a collection hopper 413, and a discharge valve 414. The cooling pipe 412 is fixedly installed on the upper side of the cooling tank 411. The cooling pipe 412 is filled with circulating coolant delivered by a pump. The collection hopper 413 is fixedly installed on the lower side of the cooling pipe 412. The discharge valve 414 is fixedly installed at the bottom of the collection hopper 413.
[0036] The control module 42 includes a moving module and a connecting module. The moving module is installed on the upper side of the collection hopper 413, and the connecting module is installed on the inner wall of the collection hopper 413.
[0037] The moving module includes a rotating frame 421, a float 422, and a pressing block 423. The middle part of the rotating frame 421 is rotatably installed in the collection hopper 413. The float 422 is fixedly installed at the lower end of the rotating frame 421, and the pressing block 423 is fixedly installed at the upper end of the rotating frame 421.
[0038] The conductive module includes an elastic shell 424, a movable plate 425, a slide rod 426, a second spring 427, and a conductive block 428. The elastic shell 424 is fixedly installed on the inner wall of the collection hopper 413. The movable plate 425 is fixedly installed in the middle of the inner wall of the elastic shell 424. The slide rod 426 is fixedly installed on the movable plate 425 and is slidably connected to the collection hopper 413. The slide rod 426 is fitted with a second spring 427. The two ends of the second spring 427 are fixedly connected to the movable plate 425 and the collection hopper 413, respectively. A conductive block 428 is fixedly installed on the movable plate 425 and the collection hopper 413, respectively. The conductive blocks 428 are electrically connected to the controller of the discharge valve 414.
[0039] like Figure 1-4 As shown, the filtration mechanism 1 includes an inlet pipe 11, an outlet pipe 12, a processing box 13, a spiral guide plate 14, a central pipe 15, and an ash hopper 16. One end of the inlet pipe 11 is fixedly connected to the outlet of the cooling box 411, and the other end of the inlet pipe 11 is fixedly connected to the inlet of the processing box 13. The spiral guide plate 14 is fixedly installed on the inner wall of the processing box 13. The central pipe 15 is fixedly installed on the upper side of the inside of the processing box 13. The outlet pipe 12, which communicates with the central pipe 15, is fixedly installed on the upper side of the processing box 13. The ash hopper 16 is fixedly installed on the lower side of the processing box 13.
[0040] The recovery mechanism 3 includes a diversion valve 31, a diversion pipe 32, a carbon dioxide recovery device 33, and a sulfur dioxide concentration detector 34. The outer end of the outlet pipe 12 is fixedly connected to the inlet end of the diversion valve 31; one outlet end of the diversion valve 31 is fixedly connected to one end of the diversion pipe 32, and the other end of the diversion pipe 32 is fixedly connected to the inlet end of the external sulfur dioxide adsorption device; the other outlet end of the diversion valve 31 is fixedly connected to the inlet end of the carbon dioxide recovery device 33; and a sulfur dioxide concentration detector 34 is installed on the outlet pipe 12.
[0041] The outlet of the external sulfur dioxide adsorption device is connected to the inlet of the carbon dioxide recovery device 33.
[0042] The carbon dioxide recovery device 33 uses mature technologies in the field, such as the carbon dioxide recovery device disclosed in Chinese patent CN103505986A.
[0043] The sulfur dioxide adsorption device uses mature technologies in this field, such as a sulfur dioxide recovery and adsorption device disclosed in Chinese patent CN221752725U.
[0044] The sulfur dioxide concentration detector 34 uses mature technologies in this field, such as a device for detecting sulfur dioxide concentration in exhaust gas disclosed in Chinese patent CN216247888U.
[0045] like Figure 4 , Figure 6and Figure 7 As shown, the vibration cleaning module 21 includes a movable frame 212, guide columns 213, a first spring 214, and a filter screen 215. An installation groove 211 is provided on the inner wall of the central pipe 15. Guide columns 213 are uniformly and evenly fixedly installed in a circular array within the installation groove 211. The movable frame 212 is slidably connected to multiple guide columns 213. A filter screen 215 is fixedly installed in the middle of the movable frame 212. The first spring 214 is sleeved on the guide columns 213. The two ends of the first spring 214 are fixedly connected to the movable frame 212 and the installation groove 211, respectively.
[0046] The knocking dust removal module 22 includes a rotating arm 221, a knocking block 222, and a pull rope 223. The upper end of the rotating arm 221 is rotatably installed on the inner wall of the central pipe 15, and the lower end of the rotating arm 221 is fixedly installed with the knocking block 222. The middle part of the rotating arm 221 is fixedly connected to one end of the pull rope 223, and the other end of the pull rope 223 is fixedly connected to the moving frame 212.
[0047] In this embodiment, when the filtration mechanism 1, cleaning mechanism 2, recovery mechanism 3, and cooling mechanism 4 are working normally, the kiln gas is delivered to the cooling box 411 and undergoes heat exchange with the cooling pipe 412 in the cooling box 411, so that the water vapor in the kiln gas is cooled and falls into the collection hopper 413; the cooling water accumulates in the collection hopper 413 until the water level rises and contacts the float 422. Under the buoyancy of the cooling water, the float 422 drives the rotating frame 421 to rotate, so that the pressure block 423 at the upper end of the rotating frame 421 squeezes the elastic shell 424, thereby squeezing the moving plate 425 inside the elastic shell 424; the moving plate 425 moves horizontally under the limiting action of the slide rod 426, and the second spring 427 is compressed until the conductive block 428 on the moving plate 425 contacts the conductive block 428 on the collection hopper 413; at this time, the controller of the discharge valve 414 is activated, and the controller of the discharge valve 414 opens the discharge valve 414 to discharge the water accumulated in the collection hopper 413;
[0048] After the water vapor in the kiln gas is cooled in the cooling box 411, the remaining gas enters the processing box 13 through the outlet pipe 12. Large particles in the gas settle and fall into the ash hopper 16 via the spiral guide plate 14. The remaining gas flows upward through the bottom of the central pipe 15. Small particles in the gas are blocked by the filter screen 215. The remaining gas then flows back into the outlet pipe 12. The sulfur dioxide concentration detector 34 inside the outlet pipe 12 determines the concentration of sulfur dioxide in the gas. If the sulfur dioxide concentration is low, the diversion valve 31 is operated to connect the outlet pipe 12 to the carbon dioxide recovery device 33, which recovers the carbon dioxide from the gas. If the sulfur dioxide concentration is high, the diversion valve 31 is operated to connect the outlet pipe 12 to the diversion pipe 32. The gas is then introduced into an external sulfur dioxide adsorption device through the diversion pipe 32 to remove the sulfur dioxide before being introduced into the carbon dioxide recovery device 33. Carbon dioxide in the gas is collected to make the collected carbon dioxide gas purer. During this process, a large amount of dust adheres to the bottom of the filter screen 215, which blocks the filter screen 215. At this time, the airflow drives the filter screen 215 to move upward. The moving frame 212 moves upward and drives the rotating arm 221 to rotate upward through the pull rope 223. The filter screen 215 moves vertically under the limiting action of the moving frame 212 and the guide column 213, and the first spring 214 is stretched. After the kiln gas is cleaned and no more airflow flows in, the first spring 214 resets and drives the moving frame 212 to vibrate, thereby driving the filter screen 215 to vibrate and clean the dust on the filter screen 215. At the same time, when the first spring 214 resets, the moving frame 212 resets, so the moving frame 212 no longer pulls the rotating arm 221 through the pull rope 223. The rotating arm 221 rotates downward under the gravity of the knocking block 222. The knocking block 222 knocks the central pipe 15, causing the central pipe 15 to vibrate and causing the dust attached to the side wall to fall off.
[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A multi-stage kiln gas filtration and collection device, comprising a filtration mechanism (1), a cleaning mechanism (2), a recovery mechanism (3), and a cooling mechanism (4), characterized in that: The cooling mechanism (4) includes a cooling module (41) and a control module (42). The control module (42) is installed inside the cooling module (41). The cooling module (41) is connected to the filter mechanism (1), and the filter mechanism (1) is connected to the recovery mechanism (3). The air outlet of the cooling module (41) is connected to the air inlet of the filter mechanism (1), and the air outlet of the filter mechanism (1) is connected to the air inlet of the recovery mechanism (3). A cleaning mechanism (2) is installed inside the filter mechanism (1); the cleaning mechanism (2) includes a vibration cleaning module (21) and a knocking dust removal module (22); the filter mechanism (1) is equipped with a vibration cleaning module (21) and multiple sets of knocking dust removal modules (22), and the multiple sets of knocking dust removal modules (22) are connected to the vibration cleaning module (21).
2. The kiln gas multi-stage filtration collection device according to claim 1, characterized in that, The cooling module (41) includes a cooling tank (411), a cooling pipe (412), a collection hopper (413), and a discharge valve (414). The cooling pipe (412) is fixedly installed on the upper side of the cooling tank (411). The cooling pipe (412) is filled with circulating coolant delivered by a pump. The collection hopper (413) is fixedly installed on the lower side of the cooling pipe (412). The discharge valve (414) is fixedly installed at the bottom of the collection hopper (413).
3. The kiln gas multi-stage filtration collection device according to claim 2, characterized in that, The control module (42) includes a moving module and a connecting module. The moving module is installed on the upper side of the collection hopper (413), and the connecting module is installed on the inner wall of the collection hopper (413).
4. The kiln gas multi-stage filtration collection device according to claim 3, characterized in that, The moving module includes a rotating frame (421), a float (422), and a pressing block (423). The middle part of the rotating frame (421) is rotatably installed in the collection hopper (413). The float (422) is fixedly installed at the lower end of the rotating frame (421), and the pressing block (423) is fixedly installed at the upper end of the rotating frame (421).
5. The kiln gas multi-stage filtration collection device according to claim 4, characterized in that, The conductive module includes an elastic shell (424), a movable plate (425), a slide rod (426), a second spring (427), and a conductive block (428). The elastic shell (424) is fixedly installed on the inner wall of the collection hopper (413). The movable plate (425) is fixedly installed in the middle of the inner wall of the elastic shell (424). The slide rod (426) is fixedly installed on the movable plate (425). The slide rod (426) is slidably connected to the collection hopper (413). The slide rod (426) is sleeved with a second spring (427). The two ends of the second spring (427) are fixedly connected to the movable plate (425) and the collection hopper (413) respectively. A conductive block (428) is fixedly installed on the movable plate (425) and the collection hopper (413) respectively. The conductive block (428) is electrically connected to the controller of the discharge valve (414).
6. The kiln gas multi-stage filtration collection device according to claim 2, characterized in that, The filtration mechanism (1) includes an inlet pipe (11), an outlet pipe (12), a processing box (13), a spiral guide plate (14), a central pipe (15), and an ash hopper (16). One end of the inlet pipe (11) is fixedly connected to the outlet of the cooling box (411), and the other end of the inlet pipe (11) is fixedly connected to the inlet of the processing box (13). A spiral guide plate (14) is fixedly installed on the inner wall of the processing box (13). A central pipe (15) is fixedly installed on the upper side inside the processing box (13). An outlet pipe (12) communicating with the central pipe (15) is fixedly installed on the upper side of the processing box (13). An ash hopper (16) is fixedly installed on the lower side of the processing box (13).
7. The kiln gas multi-stage filtration collection device according to claim 6, characterized in that, The vibration cleaning module (21) includes a movable frame (212), guide columns (213), a first spring (214), and a filter screen (215). The inner wall of the central pipe (15) is provided with an installation groove (211). The guide columns (213) are uniformly fixedly installed in a circular array at equal intervals in the installation groove (211). The movable frame (212) is limited and slidably connected to multiple guide columns (213). The filter screen (215) is fixedly installed in the middle of the movable frame (212). The first spring (214) is sleeved on the guide column (213). The two ends of the first spring (214) are fixedly connected to the movable frame (212) and the installation groove (211) respectively.
8. The kiln gas multi-stage filtration collection device according to claim 7, characterized in that, The knocking dust removal module (22) includes a rotating arm (221), a knocking block (222), and a pull rope (223). The upper end of the rotating arm (221) is rotatably installed on the inner wall of the central pipe (15), and the lower end of the rotating arm (221) is fixedly installed with the knocking block (222). The middle part of the rotating arm (221) is fixedly connected to one end of the pull rope (223), and the other end of the pull rope (223) is fixedly connected to the moving frame (212).