Ceramic fiber filter tube

Abstract

This invention relates to the field of filtration device technology, and more particularly to a ceramic fiber filter tube. The ceramic fiber filter tube includes a tube body with one end sealed and the other open. The open end of the tube body has an outer flange. A rigid connecting rod is installed inside the tube body. The sealed end of the tube body has a perforation. One end of the connecting rod passes through the perforation and protrudes from the tube body, with a support member installed at the end protruding from the tube body. The other end of the connecting rod is directly or indirectly connected to an annular pressure plate, which covers the outer flange at the open end of the tube body. The end of the connecting rod protruding from the tube body has a locking structure, which is used to bring the annular pressure plate and the support member closer together, clamping the tube body from both ends. By installing a rigid connecting rod inside the tube body and having the connecting rod pass through the sealed end of the tube body, support force is provided to the tube body, improving the overall strength of the filter tube and making the tube body less prone to large-scale bending deformation, thus preventing the tube body from bending and breaking.

Description

Technical Field

[0001] This invention relates to the field of filtration device technology, and more particularly to a ceramic fiber filter tube. Background Technology

[0002] Ceramic fiber filter tubes are self-supporting filter elements with inherent structural strength, typically eliminating the need for a duct support. Each tube consists of a body with one sealed end and an open end. The open end of the tube has an outward flange. After the filter tube is placed into the mounting holes on the dust collector's tube sheet, the flange at the open end hooks onto the edge of the mounting hole, thus supporting the filter tube within the dust collector. Several filter tubes are arranged horizontally within the filter. Airflow enters the filter horizontally from the inlet on the dust collector, perpendicular to the direction of the filter tube's extension. The airflow passes through the tube wall into the interior of the filter tube and exits upwards from the open end. Under certain loads or strong horizontal airflow conditions, the filter tubes are prone to bending and swaying at the lower end. Since the tube body is made of ceramic fiber, bending can easily lead to breakage, shortening the filter tube's lifespan, affecting the dust collector's normal dust removal function, and increasing dust collection costs. In addition, dust and other particles filtered out during the operation of ceramic fiber filter tubes remain on the tube wall. As more and more dust accumulates, the tube becomes heavier and heavier, which can easily cause breakage at the connection between the tube and the outer flange. Summary of the Invention

[0003] The purpose of this invention is to provide a ceramic fiber filter tube to solve the problem that existing ceramic fiber filter tubes are prone to breakage when subjected to external forces.

[0004] To achieve the above objectives, the ceramic fiber filter tube of the present invention adopts the following technical solution:

[0005] A ceramic fiber filter tube includes a tube body with one end sealed and the other end open. The open end of the tube body has an outer flange. The tube body is characterized by: a rigid connecting rod installed inside the tube body; a through hole for the connecting rod to pass through at the sealed end of the tube body; one end of the connecting rod passing through the through hole and extending out of the tube body, with a support member installed at the end passing out of the tube body; the other end of the connecting rod being directly or indirectly connected to an annular pressure plate, which covers the outer flange at the open end of the tube body; and a locking structure at the end of the connecting rod extending out of the tube body, which is used to bring the annular pressure plate and the support member closer together and clamp the tube body from both ends respectively.

[0006] Beneficial effects: By installing a rigid connecting rod inside the tube and passing it through the sealed end of the tube, a supporting force is provided to the tube, improving the overall strength of the filter tube. When the tube swings, it needs to overcome the rigidity of the connecting rod, thus preventing the tube from bending and deforming significantly, providing better protection and avoiding tube breakage. At the same time, a support is installed at one end of the connecting rod, and the other end is connected to an annular pressure plate. The annular pressure plate presses against the outer flange at the opening end of the tube, which is equivalent to the connecting rod pulling the support upward, thereby supporting the tube from below. This reduces the stress at the connection between the tube and the outer flange, preventing the tube from breaking at the connection point.

[0007] Furthermore, the sealing end of the pipe is a curved surface that protrudes outward, and the supporting component is a bowl-shaped tray that matches the shape of the sealing end of the pipe. The bowl-shaped tray supports the sealing end of the pipe from bottom to top.

[0008] Beneficial effects: Designing the support as a bowl-shaped tray that matches the shape of the pipe's sealing end allows the support to have a larger supporting contact surface, which is beneficial for stress dispersion and avoids stress concentration at a single point on the pipe's sealing end, thus preventing pipe breakage and providing better protection for the pipe.

[0009] Furthermore, the locking structure includes a threaded section at one end of the connecting rod that protrudes from the tube body and a nut screwed onto the threaded section, with the support being pressed against the tube body sealing end by the nut.

[0010] Beneficial effects: On the one hand, it makes the connecting rod easier to assemble and disassemble; on the other hand, the tightness of the support component on the pipe body can be changed by adjusting the tightness of the nut, which avoids excessive compression of the pipe body and causes cracking, thus providing better protection for the pipe body.

[0011] Furthermore, the joints between the support and the pipe body, as well as the joints between the support and the nut, are all sealed.

[0012] Beneficial effects: Prevents leakage near the pipe's sealing end and ensures normal airflow within the pipe.

[0013] Furthermore, the joints between the support and the pipe body, as well as the joints between the support and the nut, are coated with high-temperature refractory mortar to achieve a seal.

[0014] Beneficial effects: High-temperature refractory mortar has good high-temperature resistance. When high-temperature refractory mortar is used to seal the joints, reliable sealing can still be guaranteed even in high-temperature environments, thus ensuring the dust removal function of the filter tube.

[0015] Furthermore, a transition tube is provided at the open end of the tube body. The transition tube is made of rigid material and is used for transitional connection between the annular pressure plate and the connecting rod.

[0016] Beneficial effects: By setting a rigid transition tube, a rigid connection is formed between the transition tube and the connecting rod, which further improves the structural strength of the ceramic fiber filter tube and provides better anti-sway effect.

[0017] Furthermore, the transition tube is welded to the annular pressure plate and the connecting rod.

[0018] Beneficial effects: On the one hand, the connection strength is high; on the other hand, the transition pipe, annular pressure plate, and connecting rod can be assembled as a whole after welding, making installation convenient and time-saving.

[0019] Furthermore, the transition tube is a Venturi tube.

[0020] Beneficial effects: After a period of use, dust and other filter materials remain on the tube wall. Back-blowing is needed to blow these filter materials off to prevent the tube wall from clogging. The transition tube uses a venturi tube, which can create negative pressure at the venturi tube outlet during back-blowing, accelerate gas flow, and improve the back-blowing effect.

[0021] Furthermore, the length of the venturi tube is 200-300mm.

[0022] Beneficial effects: The Venturi tube structure has high strength and good back-blowing effect.

[0023] Furthermore, the connecting rod is Y-shaped, with one end of the Y-shaped connecting rod extending out of the tube body and the other two ends fixedly connected to the venturi tube.

[0024] Beneficial effects: The connecting rod and the annular pressure plate have two fixed connection points, making the connection more secure and the anti-sway effect better. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the ceramic fiber filter tube of the present invention;

[0026] In the diagram: 1. Tube body; 2. Outer flange; 3. Annular pressure plate; 4. Venturi tube; 5. Connecting rod; 6. Bowl-shaped tray; 7. Nut. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0031] Example 1 of the ceramic fiber filter tube of the present invention:

[0032] like Figure 1 As shown, the ceramic fiber filter tube includes a tube body 1, which has an open end and a closed end. The open end of the tube body 1 has an external flange 2. A connecting rod 5, made of stainless steel, is installed inside the tube body 1 and extends axially along the tube body 1. The closed end of the tube body 1 has a through hole, through which the lower end of the connecting rod 5 protrudes from the tube body 1. A bowl-shaped tray 6 is installed at the end of the connecting rod 5 that protrudes from the tube body 1. The closed end of the tube body 1 has an outwardly convex curved surface. The shape of the bowl-shaped tray 6 is adapted to the closed end of the tube body 1, with the bowl-shaped tray 6 facing the closed end of the tube body 1. A through hole is provided at the bottom of the bowl-shaped tray 6, through which the connecting rod 5 passes and is locked by a nut 7. The end of the connecting rod 5 that protrudes from the tube body 1 has a threaded section, on which the nut 7 is screwed. After tightening the nut 7, the bowl-shaped tray 6 is tightly fastened to the closed end of the tube body 1, thus supporting the tube body 1 from below. The bowl-shaped tray 6 has a large supporting contact surface, which is beneficial for stress dispersion and avoids stress concentration at a single point on the sealing end of the tube 1, which could lead to breakage of the tube 1. It can provide better protection for the tube 1. The tightness of the bowl-shaped tray 6 on the tube 1 can be changed by adjusting the tightness of the nut 7, avoiding over-tightening that could cause the tube 1 to crack.

[0033] The bowl-shaped tray 6 is made entirely of stainless steel. A rigid connection is formed between the connecting rod 5 and the bowl-shaped tray 6, further enhancing the structural strength of the filter tube. This increases the resistance that the tube 1 needs to overcome when it swings, providing better protection for the tube 1. A gasket is also provided between the bottom of the bowl-shaped tray 6 and the nut 7, with the nut 7 pressing firmly against the gasket. High-temperature refractory mortar is applied to the joint between the bowl-shaped tray 6 and the tube 1, as well as to the sealing area of ​​the nut 7 at the bottom of the bowl-shaped tray 6, to fill the gaps and ensure airtightness. High-temperature refractory mortar has excellent high-temperature resistance; using it to seal the joints ensures reliable sealing even in high-temperature environments, thus guaranteeing the dust removal function of the filter tube.

[0034] The tube body 1 has a venturi tube 4 at its open end. The venturi tube 4 is made of stainless steel. The lower end of the venturi tube 4 is welded to the connecting rod 5. An annular pressure plate 3 is welded to the upper end of the venturi tube 4. The annular pressure plate 3 covers the outer flange 2 at the open end of the tube body 1 and avoids the opening at the open end of the tube body 1. After tightening the nut 7, the annular pressure plate 3 and the bowl-shaped tray 6 clamp the tube body 1 from the upper and lower sides respectively. The length of the venturi tube 4 is 200-300mm, which has high structural strength. The connecting rod 5 is Y-shaped. The Y-shaped connecting rod includes an axial extension section and two bifurcated sections located at the upper end of the axial extension section. The two bifurcated sections are welded to the venturi tube 4. The lower end of the axial extension section extends downward through the tube body 1. By making the connecting rod 5 Y-shaped, the upper end of the connecting rod 5 is welded to the venturi tube 4 at two points, making the connection more secure and further improving the anti-sway effect.

[0035] After a period of use, dust and other filter materials remain on the tube wall. Backflushing is needed to blow these materials off to prevent blockage. A venturi tube 4 is installed at the open end of tube body 1, which creates negative pressure at the outlet of venturi tube 4 during backflushing, accelerating gas flow and improving the backflushing effect. The annular pressure plate 3, venturi tube 4, and connecting rod 5 are welded into a single unit, providing high connection strength and allowing for easy and time-saving installation when assembled with tube body 1.

[0036] The ceramic fiber filter tube of this invention provides support to the tube body 1 by installing a rigid connecting rod 5 inside the tube body 1 and having the connecting rod 5 pass through the sealed end of the tube body 1. Simultaneously, a rigid venturi tube 4 is connected to the upper end of the connecting rod 5, and a rigid bowl-shaped tray 6 is installed at the lower end, forming a rigid connection structure. This improves the overall structural strength of the filter tube. External forces can only cause the tube body 1 to swing when overcoming the rigid force of the rigid structure. Therefore, the tube body 1 is less prone to significant bending deformation, providing better protection and preventing bending and breakage. Furthermore, the bowl-shaped tray 6 is installed at one end of the connecting rod 5, and the other end is connected to an annular pressure plate 3 through the venturi tube 4. The annular pressure plate 3 presses against the outer flange 2 at the open end of the tube body 1, effectively pulling the bowl-shaped tray 6 upwards. This allows the bowl-shaped tray 6 to support the tube body 1 from below, reducing the stress at the connection point between the tube body 1 and the outer flange 2, thus preventing breakage at this point.

[0037] Example 2: In Example 1 above, the sealing end of the tube is a curved surface that protrudes outward, and the support is a bowl-shaped tray that matches the shape of the sealing end of the tube. In this example, the support is a hemispherical mesh structure formed by several intersecting ribs. The connecting rod and the sealing end of the tube are sealed together at the perforation. The connection between the connecting rod and the locking structure is coated with sealant to achieve a seal.

[0038] Example 3: In Example 1 above, the lower end of the connecting rod is provided with a threaded section, and a nut is screwed onto the threaded section to press the bowl-shaped tray. In this example, the lower end of the connecting rod is provided with a radial through hole, and a wedge-shaped stop pin passes through the radial through hole to press the bowl-shaped tray.

[0039] Example 4: In Example 1 above, a Venturi tube is provided at the open end of the tube body, and the Venturi tube is transitionally connected between the annular pressure plate and the connecting rod. In this example, a reducing tube with a thicker upper diameter and a thinner lower diameter is provided at the open end of the tube body. The lower end of the reducing tube is connected to the connecting rod, and the upper end is connected to the annular pressure plate.

[0040] Example 5: The difference from Example 1 is that no Venturi tube or other transition tube of any shape is set. The upper end of the connecting rod is directly fixedly connected to the annular pressure plate.

[0041] Example 6: In Example 1 above, the connecting rod is Y-shaped, with one end protruding from the tube body and the other two ends welded to the venturi tube. In this example, the connecting rod includes an axial extension section, the lower end of which protrudes from the tube body, and the upper end of which has a three-pronged structure, which is welded to the venturi tube. In other examples, the connecting rod can also be T-shaped, with the vertical section protruding from the tube body and the horizontal section welded to the venturi tube.

[0042] Example 7: In Example 1 above, the joints between the bowl-shaped tray and the tube body, as well as the joints between the bowl-shaped tray and the nut, were sealed with high-temperature refractory putty. In this example, phenolic resin adhesive is used to seal each joint. In other examples, other high-temperature resistant adhesives, such as epoxy adhesive, can also be used.

[0043] Example 8: In Example 1 above, the length of the venturi tube is 200-300mm. This length range ensures both high strength and good back-blowing effect. In this example, the length of the venturi tube is less than 200mm. In other examples, the length of the venturi tube can be greater than 300mm. If the venturi tube is too short, its strength is low and the back-blowing effect is poor; if it is too long, it will obstruct the airflow of the forward filter, affecting the dust removal performance.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A ceramic fiber filter tube, comprising a tube body sealed at one end and open at the other, wherein the open end of the tube body has an external flange, characterized in that: A rigid connecting rod is installed inside the tube. The sealed end of the tube has a through hole through which the connecting rod can pass. One end of the connecting rod passes through the through hole and protrudes from the tube. A support is installed at the end of the connecting rod that protrudes from the tube. The other end of the connecting rod is directly or indirectly fixedly connected to an annular pressure plate. The annular pressure plate covers the outer flange of the open end of the tube. The end of the connecting rod that protrudes from the tube has a locking structure. The locking structure includes a threaded section at the end of the connecting rod that protrudes from the tube and a nut screwed onto the threaded section. The support is pressed against the sealed end of the tube by the nut. The locking structure is used to bring the annular pressure plate and the support closer together and clamp the tube from both ends. This is to overcome the rigidity of the connecting rod when the tube swings. The degree of clamping of the tube by the annular pressure plate and the support is changed by adjusting the tightness of the nut, so as to avoid excessive compression of the tube and cracking of the tube.

2. The ceramic fiber filter tube according to claim 1, characterized in that: The sealing end of the pipe is a curved surface that protrudes outwards, and the supporting component is a bowl-shaped tray that matches the shape of the sealing end of the pipe. The bowl-shaped tray supports the sealing end of the pipe from bottom to top.

3. The ceramic fiber filter tube according to claim 1 or 2, characterized in that: The tube body has a transition tube at the open end. The transition tube is made of rigid material and is used to transition between the annular pressure plate and the connecting rod.

4. The ceramic fiber filter tube according to claim 3, characterized in that: The transition tube is welded to the annular pressure plate and the connecting rod.

5. The ceramic fiber filter tube according to claim 4, characterized in that: The transition tube is a Venturi tube.

6. The ceramic fiber filter tube according to claim 5, characterized in that: The length of the venturi tube is 200-300mm.

7. The ceramic fiber filter tube according to claim 5, characterized in that: The connecting rod is Y-shaped, with one end of the Y-shaped connecting rod protruding out of the tube body and the other two ends fixedly connected to the venturi tube, and the connecting rod is fixedly connected to the lower end of the venturi tube.

8. The ceramic fiber filter tube according to claim 5, characterized in that: The connecting rod includes an axial extension section, the lower end of which extends out of the tube body, and the upper end of the axial extension section has a three-pronged structure, which is welded to the venturi tube.

9. The ceramic fiber filter tube according to claim 1, characterized in that: The joints between the support and the pipe body, as well as the joints between the support and the nut, are all sealed.

10. The ceramic fiber filter tube according to claim 9, characterized in that: The joints between the support and the pipe body, as well as the joints between the support and the nut, are coated with high-temperature refractory mortar to achieve a seal.

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