A crystallizer crucible cylinder barrel welding device

Abstract

The application relates to the technical field of welding equipment, and discloses a crystallizer crucible cylinder body welding device, which comprises a support for placing a crucible, a sealing mechanism arranged on the support, a baffle mounted on the support, a pair of guide rails arranged on the baffle, a moving ring slidably arranged in the guide rail, a moving plate connected between the two moving rings, a welding port arranged on the moving plate and flush with a crucible weld, when the moving plate is pushed, the welding port moves along the crucible weld, an air outlet is arranged on the baffle, and the two moving rings are sealingly connected by an aluminum foil, when welding, the air outlet exhausts air outward, and the smoke and dust generated during welding is discharged through the air outlet. The device makes external airflow enter the sealing space through the welding port and then be discharged through the air outlet, avoids that the smoke and dust splashes the processing personnel, and has low power consumption.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically, to a welding device for the body of a crystallizer crucible. Background Technology

[0002] The crucible barrel of a crystallizer is a key component commonly used in industries such as metallurgy and semiconductors. Its barrel body is usually made of rolled and welded metal sheets. During the welding process of the crucible barrel body, a large amount of fumes are generated at the welding points. These fumes not only contain harmful metal particles, but also pose a serious threat to the health of operators.

[0003] In existing technologies, when fumes are generated at welding points, fans are often used in conjunction with hoods to remove them. However, since the hoods are semi-sealed, the fume absorption effect is not ideal. To improve the absorption effect, the fan power must be increased, which also increases energy consumption. Summary of the Invention

[0004] This invention provides a crystallizer crucible body welding device, which can solve the problem mentioned in the background art that in the prior art, smoke and dust are generated at the welding point. Fans are usually used with a fan hood to remove the smoke and dust. However, since the fan hood is a semi-sealed structure, the smoke and dust absorption effect is not ideal. If the absorption effect is to be improved, the fan power can only be increased, which will also increase the energy consumption.

[0005] To achieve the above objectives, this solution provides a welding device for the body of a crystallizer crucible, including a support for placing the crucible, a sealing mechanism on the support, the sealing mechanism including a surrounding plate, the surrounding plate being mounted on the support, a pair of guide rails on the surrounding plate, the pair of guide rails being arranged one above the other, a movable ring being slidably installed inside the guide rails, a movable plate being connected between the upper and lower movable rings, a welding port being opened on the movable plate, and the welding port being flush with the weld seam of the crucible, when the movable plate is pushed, the welding port moves along the weld seam of the crucible; The enclosure is equipped with an air extraction port, and an aluminum foil is sealed between the upper and lower movable rings. During welding, the air extraction port draws air outward, and the welding fumes are discharged through the air extraction port.

[0006] Optionally, the support is provided with a horizontal plate, the surrounding plate is installed on the horizontal plate, the horizontal plate has a circular hole for placing the crucible, and a buffer pad is provided inside the circular hole. Before welding, the lower part of the crucible is placed on the buffer pad.

[0007] Optionally, the aluminum foil is configured as a double-layer aluminum foil, and a plurality of connecting spring wires are provided between the two layers of aluminum foil. The connecting spring wires are vertically arranged, and the bottom end of the connecting spring wire is fixedly connected to the bottom movable ring, and the top end of the connecting spring wire is fixedly connected to the upper movable ring.

[0008] Optionally, the movable plate is configured as a transparent plate for easy observation, and a welding filter is provided on the outer side of the movable plate. The inner diameter of the welding joint is larger than the outer diameter of the welding head of the welding gun. During welding, the airflow flows from the outer side of the welding joint to the inner side of the movable plate.

[0009] Optionally, a pair of push rods for pushing the movable plate are installed on the movable plate, and the pair of push rods are respectively located on both sides of the weld joint.

[0010] Optionally, a plurality of balls are installed on the moving ring and are equidistantly arranged on the moving ring, and the balls make rolling contact with the inner wall of the guide rail.

[0011] Optionally, a sealing ring is installed on the upper guide rail. The sealing ring is a flexible rubber ring with an inner diameter larger than the outer diameter of the crucible. A hose clamp is fitted on the outside of the sealing ring. The hose clamp is an adjustable hose clamp. Before welding, the adjusting bolt of the hose clamp is tightened, and the sealing ring is in close contact with the crucible.

[0012] Optionally, a filter plate is installed at one end of the air extraction port located inside the enclosure. The filter plate is a stainless steel filter plate with a pore size of less than 3 mm.

[0013] Optionally, a cleaning spring wire is installed on the moving ring, which intermittently scrapes the surface of the filter plate. After the surface of the filter plate is scraped, the welding slag clogging the pores of the filter plate is removed.

[0014] Optionally, multiple cleaning spring wires are provided, and the lengths of the multiple cleaning spring wires are different, and the multiple cleaning spring wires intermittently scrape different parts of the filter plate.

[0015] Through the above technical solution, the crystallizer crucible body welding device provided by this solution is used as follows: This device uses a surrounding plate and aluminum foil to fully protect the space around the weld. When the air extraction port on the surrounding plate is used to extract air, the external airflow enters the sealed space from the weld and then exits from the air extraction port, thereby directing the welding fumes to the air extraction port, preventing the fumes from hitting the processing personnel, and the power consumption is low. Furthermore, this device employs lightweight components such as aluminum foil and connecting spring wire, and incorporates ball bearings in the moving ring to reduce movement resistance, ensuring smoother movement of the moving plate. Additionally, a welding filter is installed on the outer side of the moving plate, eliminating the need for workers to wear protective goggles and facilitating welding operations. Furthermore, as the moving ring moves, the cleaning spring wire scrapes against the surface of the filter plate, achieving automatic cleaning of the filter plate surface, preventing clogging, and increasing the practicality of the device.

[0016] Other features and advantages of this solution will be described in detail in the following detailed implementation section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the sealing mechanism of the present invention.

[0019] Figure 3 Appendix to this invention Figure 2 A magnified structural diagram of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the structure of the movable plate of the present invention.

[0021] Figure 5 Appendix to this invention Figure 4 A magnified structural diagram at point B in the middle.

[0022] Figure 6 This is an exploded structural diagram of the air extraction port and filter plate of the present invention.

[0023] Figure 7 This is an exploded structural diagram of the sealing ring and hose clamp of the present invention.

[0024] Figure 8 This is a schematic diagram of the installation structure of the cleaning spring wire of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 101, bracket; 102, horizontal plate; 103, enclosure plate; 104, air extraction port; 105, filter plate; 106, buffer pad; 201, aluminum foil; 202, guide rail; 203, sealing ring; 204, hose clamp; 205, moving plate; 206, push rod; 207, weld joint; 208, moving ring; 209, ball bearing; 210, connecting spring wire; 211, cleaning spring wire. Detailed Implementation

[0026] To make the aforementioned objectives, features, and advantages of this solution more apparent and understandable, the specific embodiments of this solution are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this solution. However, this solution can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this solution. Therefore, this solution is not limited to the specific embodiments disclosed below.

[0027] In the description of this solution, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this solution. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings indicate the same or similar elements, which will not be repeated here.

[0028] In this solution, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.

[0029] According to some embodiments of this solution, a crystallizer crucible cylinder welding device is provided, for reference. Figures 1 to 8 As shown, the crystallizer crucible body welding device includes a support 101 for placing the crucible. The support 101 is a steel frame structure. Support legs are welded to the bottom of the support 101. Rubber shock-absorbing pads are installed at the bottom of the support legs to reduce the transmission of vibration generated during the welding process. A horizontal plate 102 is provided on the support 101. The horizontal plate 102 is fixedly installed on the top of the support 101 by bolts. The horizontal plate 102 is made of stainless steel plate with a thickness of 8-12 mm.

[0030] Please refer to the following: Figure 2A sealing mechanism is provided on the support 101. The sealing mechanism includes a surrounding plate 103, which is fixedly installed on the horizontal plate 102 by bolts. The surrounding plate 103 is an arc-shaped stainless steel plate, and the curvature of the surrounding plate 103 matches the curvature of the outer wall of the crucible. The thickness of the surrounding plate 103 is 2-4 mm. The surrounding plate 103 is used to enclose the space around the weld. An exhaust port 104 is provided on the surrounding plate 103. The exhaust port 104 is opened on the side wall of the surrounding plate 103. A filter plate 105 is installed at the end of the exhaust port 104 located on the inner side of the surrounding plate 103. The filter plate 105 is fixedly installed on the inner side wall of the surrounding plate 103 by bolts. The filter plate 105 is a stainless steel filter plate, specifically made of 316L stainless steel. The pore size of the filter plate 105 is less than 3 mm, which is used to filter large particles of welding slag in the welding fume and prevent welding slag from entering the exhaust pipe and causing blockage.

[0031] A circular hole for placing a crucible is provided on the horizontal plate 102. The diameter of the circular hole is adapted to the outer diameter of the crucible. A buffer pad 106 is fixedly installed inside the circular hole by adhesive. The buffer pad 106 is a silicone rubber pad with a thickness of 3-5 mm. Before welding, the lower part of the crucible is placed on the buffer pad 106. The buffer pad 106 plays a role in buffering and positioning, preventing rigid contact between the crucible and the horizontal plate 102 from causing damage to the surface of the crucible.

[0032] A pair of guide rails 202 are provided on the enclosure plate 103. The pair of guide rails 202 are fixedly installed on the enclosure plate 103 by bolts, one above the other. The extension direction of the guide rails 202 is consistent with the direction of the weld to be welded on the crucible. The guide rails 202 are set as C-shaped steel rails, and the length direction of the guide rails 202 extends along the arc direction of the enclosure plate 103.

[0033] A movable ring 208 is slidably installed inside the guide rail 202. The movable ring 208 is set as an arc-shaped slider structure adapted to the internal cross section of the guide rail 202. The movable ring 208 is made of plastic to reduce the overall weight. A movable plate 205 is connected between the upper and lower movable rings 208. The upper and lower ends of the movable plate 205 are fixedly connected to the upper and lower movable rings 208 by bolts. A welding port 207 is opened on the movable plate 205, and the welding port 207 is flush with the crucible weld. When the movable plate 205 is pushed, the welding port 207 moves along the crucible weld, and the welding head of the welding gun passes through the welding port 207 to perform welding operation on the crucible weld.

[0034] The exhaust port 104 is connected to an external negative pressure fan via a pipe (not shown in the figure). An aluminum foil 201 is sealed between the upper and lower moving rings 208. The upper and lower ends of the aluminum foil 201 are respectively bonded and sealed to the outer surfaces of the upper and lower moving rings 208 with high-temperature resistant adhesive. The aluminum foil 201, together with the surrounding plate 103, the moving plate 205, and the outer wall of the crucible, form a semi-enclosed welding space. During welding, the exhaust port 104 draws air outward, and the welding fumes are discharged through the exhaust port 104. Since the inner diameter of the welding port 207 is larger than the outer diameter of the welding head of the welding torch, the external airflow flows from the outside of the welding port 207 to the inside of the moving plate 205, forming a directional airflow, thereby guiding the welding fumes to the exhaust port 104 for discharge. It should be noted that since the welding space only needs to form a weak negative pressure environment, a slight gap is allowed between the moving rings 208 and the guide rail 202, which does not affect the flow direction of the fumes.

[0035] In this way, the device uses the enclosure 103 and aluminum foil 201 to fully enclose the space around the weld. When the exhaust port 104 on the enclosure 103 is used to extract air, the external airflow enters the sealed space through the weld 207 and is then discharged through the exhaust port 104. This causes the welding fumes to flow in a direction to the exhaust port 104, preventing the fumes from hitting the processing personnel. Moreover, since the sealed space is small, a high-power fan is not required to achieve a good fume extraction effect, resulting in low power consumption.

[0036] Specifically, the aluminum foil 201 is configured as a double-layer aluminum foil, with several connecting spring wires 210 arranged between the double-layer aluminum foil 201. The connecting spring wires 210 are vertically arranged and are made of spring steel. The bottom end of the connecting spring wire 210 is fixedly connected to the bottom moving ring 208 by welding, and the top end of the connecting spring wire 210 is fixedly connected to the upper moving ring 208 by welding. The arrangement of the connecting spring wires 210 maintains a certain distance between the double-layer aluminum foil 201, forming an air insulation layer, which effectively reduces the transfer of welding heat to the outside of the aluminum foil 201. At the same time, the connecting spring wires 210 provide elastic support for the aluminum foil 201, so that the aluminum foil 201 can be elastically deformed when subjected to external force and is not easily damaged. The lightweight design of the double-layer aluminum foil 201 and connecting spring wires 210 ensures sealing performance and reduces the overall weight of the moving parts, making the moving plate 205 easier to move.

[0037] In addition, the movable plate 205 is designed as a transparent plate for easy observation. Specifically, the movable plate 205 is made of high-temperature resistant quartz glass with a thickness of 4-6 mm, which has good light transmittance and high temperature resistance. A welding filter (not shown in the figure) is detachably installed on the outside of the movable plate 205 by means of a snap-fit. The filter is set as an automatic dimming filter. During welding, the filter automatically darkens to protect the operator's eyes. When welding is not in progress, the filter returns to a transparent state, making it easy for the operator to observe the weld position. Specifically, the automatic dimming filter adopts an automatic dimming component commonly used in the field of welding masks. It detects the welding arc light through a photosensitive element and controls the change of the filter layer state.

[0038] The inner diameter of the welding joint 207 is larger than the outer diameter of the welding head of the welding gun. Specifically, the inner diameter of the welding joint 207 is 8-15 mm larger than the outer diameter of the welding head of the welding gun, so as to ensure the flexibility of the welding gun operation while maintaining the negative pressure environment in the sealed space.

[0039] A pair of push rods 206 for pushing the movable plate 205 are installed on the movable plate 205. There is a pair of push rods 206, and the pair of push rods 206 are located on both sides of the welding joint 207. The push rods 206 are fixed to the outer surface of the movable plate 205 by bolts. The push rods 206 are made of stainless steel round rods. The outer surface of the push rods 206 is covered with heat-insulating silicone sleeves to prevent the operator from being burned when pushing the push rods 206. The operator holds the push rods 206 and pushes the movable plate 205 along the guide rail 202, so that the welding joint 207 moves along the crucible weld seam to realize continuous welding operation.

[0040] Multiple balls 209 are installed on the moving ring 208, and these balls 209 are arranged at equal intervals on the moving ring 208. The balls 209 are fixedly installed on the moving ring 208 by embedded mounting bases. The balls 209 make rolling contact with the inner wall of the guide rail 202. The balls 209 are made of bearing steel and have a diameter of 6-10 mm. The balls 209 convert the sliding friction between the moving ring 208 and the guide rail 202 into rolling friction, which greatly reduces the moving resistance and ensures that the moving plate 205 moves more easily and smoothly. This makes it easier for the operator to push the moving plate 205 during the welding process.

[0041] A sealing ring 203 is installed on the upper guide rail 202. The sealing ring 203 is a flexible rubber ring, specifically made of high-temperature resistant silicone rubber. The inner diameter of the sealing ring 203 is larger than the outer diameter of the crucible. A hose clamp 204 is fitted on the outside of the sealing ring 203. The hose clamp 204 is an adjustable hose clamp made of 304 stainless steel. Before welding, the sealing ring 203 is fitted onto the upper outer wall of the crucible. Then, the adjusting bolt of the hose clamp 204 is tightened to make the sealing ring 203 shrink and fit tightly against the outer wall of the crucible, thereby achieving a sealed connection between the upper guide rail 202 and the crucible and preventing welding fumes from leaking from the top. After welding is completed, the adjusting bolt of the hose clamp 204 is loosened, and the sealing ring 203 can be removed from the crucible.

[0042] Through the above technical solution, when the crystallizer crucible body welding device provided by this solution is in use, when the air extraction port 104 on the enclosure plate 103 is used to extract air, the external airflow enters the sealed space through the welding port 207 and is then discharged through the air extraction port 104. This causes the welding fumes to flow in a directional direction to the air extraction port 104, preventing the fumes from hitting the processing personnel. Moreover, since the sealed space is small, a high-power fan is not required to achieve a good fume extraction effect, resulting in low power consumption. At the same time, the lightweight design of the double-layer aluminum foil 201 and the connecting spring wire 210 not only ensures the sealing performance but also reduces the overall weight of the moving parts, making the moving plate 205 easier to move.

[0043] In some implementations of this solution, reference is made to Figure 6 , Figure 8 As shown, a cleaning spring wire 211 is installed on the moving ring 208. The cleaning spring wire 211 is made of spring steel wire. One end of the cleaning spring wire 211 is fixedly installed on the moving ring 208 by welding. The other end of the cleaning spring wire 211 is a free end and extends to the position of contact with the surface of the filter plate 105. When the moving ring 208 moves along the guide rail 202, the cleaning spring wire 211 moves with the moving ring 208 and intermittently scrapes the surface of the filter plate 105. After the surface of the filter plate 105 is scraped, the welding slag blocking the pores of the filter plate 105 is removed, realizing automatic cleaning of the surface of the filter plate 105. There is no need for manual periodic cleaning of the filter plate 105, which increases the practicality of this device.

[0044] Multiple cleaning spring wires 211 are provided, and the lengths of the multiple cleaning spring wires 211 are different. The multiple cleaning spring wires 211 intermittently rub different parts of the filter plate 105. Specifically, there are 3 to 5 cleaning spring wires 211, and their lengths are arranged in ascending or descending order, so that the free end of each cleaning spring wire 211 contacts different areas of the surface of the filter plate 105, thereby ensuring that all areas of the surface of the filter plate 105 can be cleaned and improving the cleaning effect.

[0045] It should be noted that the specific operating procedure for this device is as follows: First, place the crucible in the circular hole of the horizontal plate 102, with the lower part of the crucible supported and positioned by the buffer pad 106. Then, fit the sealing ring 203 onto the upper outer wall of the crucible and tighten the hose clamp 204 to ensure a tight fit between the sealing ring 203 and the crucible. Next, pass the welding head of the welding torch through the welding port 207 and align it with the weld seam. Turn on the negative pressure fan, and the exhaust port 104 begins to draw air outward, creating a negative pressure environment within the sealed space. The operator holds the push rod 206 and pushes the moving plate 205 to move along the guide rail 202. The welding joint 207 moves synchronously along the crucible weld. The welding torch continuously welds the weld. The fumes generated during the welding process flow in a direction to the exhaust port 104 under the action of negative pressure airflow. After being filtered by the filter plate 105, they are discharged from the exhaust port 104. When the moving ring 208 moves, the cleaning spring wire 211 intermittently scrapes the surface of the filter plate 105, automatically removing the welding slag clogging the filter plate 105.

[0046] The preferred embodiments of this solution have been described in detail above with reference to the accompanying drawings. However, this solution is not limited to the specific details in the above embodiments. Within the scope of the technical concept of this solution, various simple modifications can be made to the technical solution, and these simple modifications all fall within the protection scope of this solution.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this solution will not describe the various possible combinations separately.

[0048] Furthermore, various implementations of this solution can be combined in any way, as long as they do not violate the spirit of this solution, they should also be regarded as the content disclosed in this solution.

Claims

1. A welding device for the body of a crystallizer crucible, comprising a support (101) for placing the crucible, characterized in that: A sealing mechanism is provided on the bracket (101). The sealing mechanism includes a surrounding plate (103). The surrounding plate (103) is installed on the bracket (101). A pair of guide rails (202) are provided on the surrounding plate (103). The pair of guide rails (202) are arranged one above the other. A movable ring (208) is slidably installed inside the guide rail (202). A movable plate (205) is connected between the upper and lower movable rings (208). A welding port (207) is opened on the movable plate (205). The welding port (207) is flush with the crucible weld. When the movable plate (205) is pushed, the welding port (207) moves along the crucible weld. An air extraction port (104) is provided on the enclosure (103), and an aluminum foil (201) is sealed between the upper and lower moving rings (208). During welding, the air extraction port (104) draws air outward, and the welding fumes are discharged from the air extraction port (104).

2. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: A horizontal plate (102) is provided on the bracket (101), and the surrounding plate (103) is installed on the horizontal plate (102). A circular hole for placing the crucible is opened on the horizontal plate (102), and a buffer pad (106) is provided inside the circular hole. Before welding, the lower part of the crucible is placed on the buffer pad (106).

3. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: The aluminum foil (201) is configured as a double-layer aluminum foil, and a plurality of connecting spring wires (210) are provided between the double-layer aluminum foil (201). The connecting spring wires (210) are vertically arranged, and the bottom end of the connecting spring wires (210) is fixedly connected to the bottom moving ring (208), and the top end of the connecting spring wires (210) is fixedly connected to the top moving ring (208).

4. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: The movable plate (205) is configured as a transparent plate for easy observation. A welding filter is provided on the outside of the movable plate (205). The inner diameter of the welding port (207) is larger than the outer diameter of the welding head of the welding gun. During welding, the airflow flows from the outside of the welding port (207) to the inside of the movable plate (205).

5. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: A pair of push rods (206) for pushing the movable plate (205) are installed on the movable plate (205). The push rods (206) are provided in pairs, and the pair of push rods (206) are respectively located on both sides of the weld joint (207).

6. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: The movable ring (208) is equipped with ball bearings (209), and there are multiple ball bearings (209) arranged at equal intervals on the movable ring (208). The ball bearings (209) roll in contact with the inner wall of the guide rail (202).

7. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: A sealing ring (203) is installed on the upper guide rail (202). The sealing ring (203) is a flexible rubber ring, and the inner diameter of the sealing ring (203) is larger than the outer diameter of the crucible. A hose clamp (204) is fitted on the outside of the sealing ring (203). The hose clamp (204) is an adjustable hose clamp. Before welding, the adjusting bolt of the hose clamp (204) is tightened, and the sealing ring (203) fits tightly with the crucible.

8. The crystallizer crucible cylinder welding device according to claim 1, characterized in that: The air extraction port (104) is located on the inner side of the enclosure (103) and a filter plate (105) is installed on one end. The filter plate (105) is a stainless steel filter plate and the pore size of the filter plate (105) is less than 3 mm.

9. The crystallizer crucible cylinder welding device according to claim 8, characterized in that: A cleaning spring wire (211) is installed on the moving ring (208). The cleaning spring wire (211) intermittently scrapes the surface of the filter plate (105). After the surface of the filter plate (105) is scraped, the welding slag blocking the pores of the filter plate (105) is removed.

10. The crystallizer crucible cylinder welding device according to claim 9, characterized in that: Multiple cleaning spring wires (211) are provided, and the lengths of the multiple cleaning spring wires (211) are different. The multiple cleaning spring wires (211) intermittently scrape different parts of the filter plate (105).

Images