Swing arm connection pipe assembly and dust collector

Abstract

The utility model discloses a kind of rotary arm connecting pipe assemblies and dust collectors, wherein rotary arm connecting pipe assembly, comprising: first connecting pipe, the first end of the first connecting pipe is used to be connected with dust suction pipe;Second connecting pipe, the second end of the second connecting pipe is used to be connected with the collecting pipe of rotary arm;And hose or bellows, one end is connected with the third end of first connecting pipe, the other end is connected with the fourth end of second connecting pipe;Correspondingly, first end and third end constitute two ends of first connecting pipe, second end and fourth end constitute two ends of second connecting pipe.According to the rotary arm connecting pipe assembly of the utility model, the assembly difficulty is relatively low.

Description

Technical Field

[0001] This utility model relates to a rotating arm connecting pipe assembly, and also to a dust collector equipped with the rotating arm connecting pipe assembly. Background Technology

[0002] It should be understood that cotton processing enterprises need to carry out dust removal in their workshops to remove impurities and suspended matter such as cotton fibers that are flying in the workshop. Especially after the ginning and delinting process, dust collectors are often installed to draw in the workshop air carrying fine fibers by using airflow generated by fans. However, during the dust removal process, impurities such as fibers can clog the filter cloth of the filter bags, making it difficult to ensure the continuous operation of the equipment. Although bag dust collectors often use pulse bag dust collectors, which can shake off most of the debris on the filter bags, incomplete cleaning of the filter bags will have a significant impact on the filtration effect and cause damage to the filter cloth.

[0003] Therefore, in some implementations, a filter plate (hereinafter referred to as a filter plate) with filter cloth or filter screen is also required before the bag filter to filter out some relatively large impurities, such as cotton fibers, thereby reducing the burden on the bag filter. The mesh of the filter cloth or filter screen on the filter plate is relatively large, but as impurities such as cotton fibers adhere, the mesh will gradually become clogged. Therefore, there are existing technologies for cleaning the filter plates, mainly by using suction arms to suck up the fibers and other impurities attached to the filter plates to ensure the effectiveness of the filter cloth on the filter plates. There are usually multiple suction arms installed on the same tubular rotating shaft, collectively referred to as the rotating arm. One end of the rotating shaft needs to be connected to an air extraction device to discharge the debris sucked up by the suction arms.

[0004] Typically, for reference, Chinese patent document CN117205685A proposes a dual-stage fusion pulse dust removal system and dust collector, which includes two dust removal chambers of different sizes, namely a first dust removal chamber and a second dust removal chamber. One side of the first dust removal chamber is attached to one side of the second dust removal chamber, and the attached position is connected. A filter screen (i.e., a filter plate) is arranged at the connection position to perform the first filtration and dust removal on the impurity-laden airflow entering the second dust removal chamber from the first dust removal chamber. As the airflow carrying impurities passes through the filter plate, some impurities will be deposited on the filter screen. The rotating arm will suck away the impurities deposited on the filter screen by rotating and sweeping to ensure that the passability of the filter screen meets the predetermined requirements.

[0005] The rotating arm is mounted on one side of the filter plate via a rotary joint. This side is usually where the first dust collection chamber is located. One end of the tubular shaft at the center of the rotating arm is used to connect to the corresponding suction pipe for subsequent processing. Since the suction pipe is usually a rigid pipe, and the same dust collector often has multiple rotating arms, due to the influence of manufacturing and assembly precision, the corresponding suction interfaces in multiple rotating arms cannot be guaranteed to be strictly aligned with the pipe interfaces on the suction pipe in terms of height and lateral position. There is a high possibility of positional misalignment, which makes it very difficult to connect each suction interface to the pipe interface, requiring constant adjustments, and even readjustment of the pipe interface setting position. Utility Model Content

[0006] The purpose of this utility model is to provide a rotating arm connecting pipe assembly that can effectively reduce the assembly difficulty with the dust collection pipe. This utility model also provides a dust collector equipped with the rotating arm connecting pipe assembly.

[0007] According to a first aspect of the present invention, a rotating arm connecting pipe assembly is provided, comprising: A first connecting tube, the first end of which is used to connect to a vacuum tube; A second connecting pipe, the second end of which is used to connect to the main pipe of the rotating arm; and A flexible hose or corrugated pipe, one end of which is connected to the third end of the first connecting pipe, and the other end of which is connected to the fourth end of the second connecting pipe; Accordingly, the first end and the third end constitute the two ends of the first connecting pipe, and the second end and the fourth end constitute the two ends of the second connecting pipe.

[0008] Optionally, the distance between the third end and the fourth end is 0.8mm to 50mm.

[0009] Optionally, the first connecting pipe is provided with a first positioning structure for axial positioning when the hose or corrugated pipe is connected to the first connecting pipe; The second connecting pipe is provided with a second positioning structure for axial positioning when the hose or corrugated pipe is connected to the second connecting pipe.

[0010] Optionally, both the first positioning structure and the second positioning structure are annular components fixed on the corresponding connecting pipes; Correspondingly, the annular component has fixing holes; the hose or corrugated pipe is connected to the annular component by a flange.

[0011] Alternatively, the hose or corrugated pipe may be chemically bonded, integrally molded, or locked to the corresponding flange by a hose clamp.

[0012] Optionally, the flange includes a sleeve and a flange disposed at one end of the sleeve; Sealing elements are provided between the annular component and the corresponding flange, and between the sleeve and the corresponding connecting pipe.

[0013] Optionally, the outer diameter of the first connecting pipe is larger than the outer diameter of the second connecting pipe, and the inner diameter of the first connecting pipe is smaller than the outer diameter of the second connecting pipe; Accordingly, a fourth sealing ring is provided at the end of the second connecting pipe for connection with a hose or corrugated pipe, the fourth sealing ring being positioned on the second connecting pipe and abutting against the corresponding end of the first connecting pipe.

[0014] Optionally, the seal located between the first connecting pipe and the corresponding sleeve is a third sealing ring, which extends to the third end face and engages with the fourth sealing ring.

[0015] Optionally, the first end has a first flange, on which three to eight flange fixing holes are distributed, and the flange fixing holes are elongated holes extending laterally.

[0016] According to a second aspect of the present invention, a dust collector is provided, which is a dust collector having a filter plate, and includes a rotating arm for cleaning the filter plate, wherein one end of the rotating shaft of the rotating arm is equipped with a collection pipe. The dust collector further includes the rotating arm connecting pipe assembly described in the first aspect of the present invention, wherein the second connecting pipe in the rotating arm connecting pipe assembly is connected to the summing pipe.

[0017] In the embodiments of this utility model, the provided rotating arm connecting pipe assembly is equivalent to replacing the rotating arm connecting pipe in the prior art with an assembly. This assembly includes multiple units, one of which is a flexible hose or a corrugated pipe. The flexible hose or corrugated pipe helps to balance the relatively large coaxiality between the first connecting pipe and the suction pipe in the rotating arm connecting pipe assembly due to manufacturing errors, assembly errors, etc., thereby facilitating the connection between the rotating arm connecting pipe assembly and the suction pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a two-stage dust collector structure in one embodiment.

[0019] Figure 2 This is a schematic diagram of the main structure of the swing arm connecting pipe assembly in one embodiment.

[0020] Figure 3 for Figure 2 AA sectional view.

[0021] Figure 4 for Figure 3 Part I is an enlarged view, with the magnification ratio relative to the original image.

[0022] Figure 5 This is a schematic diagram of the left-side structure of the swing arm connecting pipe assembly in one embodiment.

[0023] Figure 6 This is a schematic diagram of the main structure of the first connecting pipe in one embodiment.

[0024] Figure 7 This is a schematic diagram of the left-side structure of the first connecting pipe in one embodiment.

[0025] Figure 8 This is a schematic diagram of the main structure of the second connecting pipe in one embodiment.

[0026] Figure 9 This is a schematic diagram of the flange structure in one embodiment.

[0027] In the diagram: 1. Support leg, 2. Ladder, 3. First row of auger, 4. Swing arm, 5. Swing arm connecting pipe assembly, 6. First dust collection chamber, 7. Air inlet, 8. Air outlet, 9. Filter plate, 10. Second dust collection chamber, 11. Dust hopper, 12. Second row of auger, 13. First flange, 14. First connecting pipe, 15. Second flange, 16. First sealing ring, 17. First positioning plate, 18. First hose clamp, 19. PU steel wire connecting pipe, 20. Second hose clamp, 21. ... 21. Second flange, 22. Second sealing ring, 23. Second positioning plate, 24. Second connecting pipe, 25. Fastening nut, 26. Third sealing ring, 27. Fourth sealing ring, 28. Fifth sealing ring, 29. Sixth sealing ring, 30. Main pipe, 31. Set screw, 32. Viewing window, 33. First positioning tube head, 34. Long hole, 35. Rivet, 36. Side opening, 37. Seventh sealing ring, 38. Window plate, 39. Second positioning tube head, 40. Flange, 41. Pipe sleeve. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Based on the basic concept of this utility model, the integral and rigid rotating arm connecting pipe in the prior art is replaced with a rotating arm connecting pipe assembly 5. This rotating arm connecting pipe assembly 5 is equivalent to manufacturing a rigid rotating arm connecting pipe into multiple units, and then assembling these multiple units into a whole. One of the units is a flexible hose or a corrugated pipe, thereby reducing the difficulty of connecting the rotating arm connecting pipe assembly 5 to the suction pipe after it is assembled on the dust collector.

[0029] In contrast, dust collectors and similar equipment are typically manufactured and assembled with low precision, meaning they are not precision machinery. This can lead to positional shifts when connecting them to external equipment due to manufacturing and assembly errors, thus increasing the difficulty of connection.

[0030] The rotating arm connecting pipe is connected to the collection pipe 30 of the rotating arm 4 in the dust collector. In short, the rotating arm 4 typically has multiple suction arms, the centripetal ends of which are connected to a rotating shaft. The rotating shaft can be a tubular shaft, with one end sealed and the other end connected to the collection pipe 30, or the tubular shaft directly forming the collection pipe 30. Generally, the collection pipe 30 and the tubular shaft are assembled using a dynamic sealing connection; that is, the collection pipe 30 is often a statically fixed pipe, connected to the tubular shaft through a rotary sealing structure. The form of the collection pipe 30 determines its connection method with the rotating arm connecting pipe, i.e., whether a dynamic or static sealing connection is used, but these are common knowledge in the art and will not be elaborated upon here. It is also clear that the embodiments of this utility model focus on describing the rotating arm connecting pipe assembly 5 itself. Other parts of the dust collector, unless directly related to the rotating arm connecting pipe assembly 5, will not be described in detail here, and those skilled in the art can use existing technology.

[0031] For reference, suction holes are distributed on the suction arm, and the suction holes are connected to the inner cavity of the suction arm, which in turn is connected to the collection tube 30.

[0032] Given that the main body of the swing arm connecting pipe assembly 5 in the embodiments of this utility model is a pipe, the commonly used reference system for pipes is mainly adopted, namely circumferential, axial and radial, and for the pipe, it has a definite inside and outside.

[0033] In addition, some content requires the use of other reference frames, such as up and down, left and right, etc. However, it should be noted that in the embodiments of this utility model, up, down, as well as other left, right, inner, outer, front, back, radial, axial, circumferential, etc., and similar expressions are for illustrative and explanatory purposes only, and are limited to not causing misunderstanding to those skilled in the art.

[0034] Similarly, statements that are mutually explanatory, such as vertical or horizontal, are also for the purpose of explanation or clarification.

[0035] Furthermore, in the mechanical field, it should be known that the front-to-back direction is also called longitudinal, head-to-tail, or length direction, while the left-to-right direction is also called transverse, width direction, or width direction. For a dust collector, the direction in which the main pipe 30 extends from the rotating arm 4 is forward, and vice versa. A dust collector typically has multiple rotating arms 4, and the distribution direction of these multiple rotating arms 4 is left-to-right, that is, transverse.

[0036] In addition, to facilitate the description of the relationship between one component or component and another component or component shown in the accompanying drawings, spatially relative terms such as "lower," "upper," and similar terms may be used in embodiments of this invention. It should be understood that the spatially relative terms are intended to cover different orientations of the device during use and operation, in addition to those depicted in the accompanying drawings.

[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0038] Furthermore, as a special note, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] It should be understood that in the field of mechanics, standard geometric terms are typically used to describe approximate mechanical structures, without implying that the mechanical mechanism possesses the exact geometric features corresponding to those terms. For example, a rectangular plate is actually described as a three-dimensional structure based on the characteristics of a two-dimensional figure. In the field of mechanics, using a specific explicit feature of a component to describe it is a common descriptive method, without implying that the component necessarily contains the exact geometric shape corresponding to that explicit feature. For example, an arc-shaped plate actually refers to the cylindrical panel portion.

[0040] Ideally, the swing arm connecting pipe assembly 5 is a horizontal and vertical pipe. However, as mentioned earlier, due to the influence of manufacturing and assembly precision, the swing arm connecting pipe assembly 5 needs adaptive adjustments to ensure connection with the vacuum cleaner pipe, which may result in it not maintaining a horizontal or strictly vertical orientation. Modularizing the swing arm connecting pipe assembly, that is, utilizing the adaptability of a single unit to the horizontal or vertical direction, reduces the assembly difficulty between the swing arm connecting pipe assembly 5 and the vacuum cleaner pipe.

[0041] As mentioned earlier, a dust collector typically has multiple rotating arms, and therefore, a dust collector also has multiple suction pipes. These suction pipes are usually connected to a main suction pipe. The suction pipes and the main suction pipe are often rigid pipes, meaning that the distance between adjacent suction pipes is roughly fixed. Due to the mutual influence between the suction pipes, even if some suction pipes are reliably connected to their corresponding rotating arm connecting pipes, the remaining suction pipes may not be accurately aligned with their corresponding rotating arm connecting pipes. Therefore, in the embodiments of this utility model, the main body of the rotating arm connecting pipe assembly 5 is composed of multiple tubular units.

[0042] like Figure 2 and Figure 4 As shown, the swing arm connecting pipe assembly 5 according to an embodiment of the present invention includes a first connecting pipe 14, a second connecting pipe 24, and, for example... Figure 2 The PU steel wire connecting pipe 19 shown is illustrated.

[0043] For example, the PU steel wire connecting tube 19 is a hose unit suitable for this utility model embodiment formed by cutting PU steel wire hose. The tube body of the PU steel wire hose is made of PU (polyurethane) material and has spiral steel wires inside the tube, so that the PU steel wire hose has a certain rigidity while maintaining a predetermined softness, and so that the rotating arm connecting tube assembly 5 is maintained in a roughly horizontal state or a slightly downward state before being connected to the vacuum hose.

[0044] PU steel wire hose is one of the commonly used plastic hoses in industry. Given that there are many types of plastic hoses commonly used in industry, and since the embodiments of this utility model do not involve special applications such as corrosion prevention, in other words, other types of plastic hoses can also be used.

[0045] In addition, a type of pipe commonly used in industry also has a certain degree of self-adjustment capability, such as metal corrugated pipes (carbon steel corrugated pipes, stainless steel corrugated pipes, aluminum alloy corrugated pipes, plastic-lined corrugated pipes, etc.), which can be used for pipe connections with non-concentric axis rotational connections, as well as pipe connections in occasions such as irregular bends, expansion and contraction, or thermal deformation.

[0046] The first connecting pipe 14 and the second connecting pipe 24 are mainly made of stainless steel fittings, i.e., rigid pipes, to facilitate connection with the dust suction pipe or the collection pipe 30.

[0047] The first end of the first connecting tube 14 (the front end in the aforementioned reference frame) is connected to the vacuum tube; for ease of explanation, the other end of the first connecting tube 14 is referred to as the third end, that is, the first end and the third end constitute the two ends of the first connecting tube 14.

[0048] Accordingly, the second end of the second connecting pipe 24 is used to connect to the converging pipe 30 of the rotating arm 4; similarly, for ease of explanation, the other end of the second connecting pipe 24 is referred to as the fourth end, which obviously constitutes the two ends of the second connecting pipe 24 together with the second end.

[0049] Accordingly, a hose or corrugated pipe is provided for the transitional connection between the first connecting pipe 14 and the second connecting pipe 24. For ease of explanation, the hose or corrugated pipe for the transitional connection between the first connecting pipe 14 and the second connecting pipe 24 is referred to as an intermediate connecting pipe.

[0050] Accordingly, one end of the intermediate connecting pipe is connected to the third end of the first connecting pipe 14, and the other end of the intermediate connecting pipe is connected to the fourth end of the second connecting pipe 24.

[0051] The following is a brief description of the connection between the rotating arm connecting pipe assembly 5 and the suction pipe, as well as the connection with the collection pipe 30. As mentioned above, the description of the rotating arm connecting pipe assembly 5 itself is emphasized in the embodiments of this utility model. The rest of the dust collector will not be described in detail unless it is related to the part of the rotating arm connecting pipe assembly 5 in the embodiments of this utility model. The connection between the rotating arm connecting pipe assembly 5 and the suction pipe, as well as the connection with the collection pipe 30, is described here in order to facilitate an overall understanding of the concept of this utility model.

[0052] Among them, the main pipe 30 is equivalent to an extension of the rotating shaft on the rotating arm. It is a roughly horizontal pipe, and its position in the horizontal and vertical directions in the dust collector is fixed. Figure 2 The right end shows a connection structure for the fourth end of the second connecting pipe 24, where multiple fastening nuts 25 are provided. These fastening nuts 25 can be fixed to the fourth end in a detachable manner or by welding. The fastening nuts 25 mainly extend the length of the set screw hole to improve the locking ability. In other words, if the wall of the second connecting pipe 24 is relatively thick, the locking between the set screw and the conduit pipe 30 can be achieved by only opening the set screw hole 31.

[0053] Figure 5 In the middle, there are three fastening nuts 25, which are evenly distributed around the fourth end. Each fastening nut 25 is equipped with a set screw 31. After the main tube 30 is inserted into the second connecting tube 24, the set screw 31 is used to lock it.

[0054] In addition, in order to improve the sealing performance of the connection, Figure 4 In the illustrated structure, a sixth sealing ring 29 is also provided between the second connecting pipe 24 and the collecting pipe 30. The sixth sealing ring 29 is a rubber sleeve for sealing.

[0055] The connection between the first connecting pipe 14 and the vacuum cleaner pipe is a flange connection. The first flange 13 located at the first end of the first connecting pipe 14 has four elongated holes 34. The elongated holes 34 extend laterally, mainly to accommodate the lateral offset of the vacuum cleaner pipe relative to its ideal position. Under this condition, for example, the PU steel wire connecting pipe 19 mainly accommodates the vertical offset of the vacuum cleaner pipe relative to its ideal position, so that the disc surface of the first flange 13 can be basically in a vertical state, and it is not easy to generate additional load under the connection condition with the vacuum cleaner pipe.

[0056] The number of elongated holes 34 is not limited to four, but there must be at least three and at most eight, with four or six being preferred. Furthermore, as mentioned earlier, the purpose of providing elongated holes 34 on the first flange 13 is primarily to accommodate the lateral offset of the suction pipe relative to its ideal position. Therefore, the hose or corrugated pipe mainly adapts to the vertical offset of the suction pipe relative to its ideal position. The two work together to effectively solve the problem of assembly difficulty caused by the offset of the suction pipe relative to its ideal position.

[0057] It should be noted that even if the elongated hole 34 provided on the first flange 13 is a regular round hole, the first flange 13 and the corresponding suction pipe can still be accurately aligned due to the irregular adjustment property of the corrugated pipe, as mentioned above. However, in the embodiments of this utility model, it is still preferable to use a flexible hose or corrugated pipe with a laterally extending elongated hole 34 provided on the first flange 13 to cooperate in connecting the first connecting pipe 14 and the second connecting pipe 24.

[0058] The openings of the third and fourth ends are rounded to avoid creating a cutting edge, thus preventing damage to the hose or corrugated pipe. Furthermore, the distance between the third and fourth ends should not be less than 0.8mm, but it should not be too large either. If it is too large, it will reduce the overall strength of the swing arm connecting pipe assembly 5 and make it easy to be damaged. Therefore, the distance between the third and fourth ends should not be greater than 50mm.

[0059] It should be noted that although the distance between the third and fourth ends in the embodiments of this utility model is not large, it is sufficient to meet the needs of adaptive connection between the current suction pipe and the rotating arm connecting pipe assembly 5. At the same time, the small distance between the third and fourth ends does not mean that the portion involved in the connection between the first connecting pipe 14 and the second connecting pipe 24 is relatively short. Figure 4 , Figure 6 and Figure 8 As can be seen in the illustrated structure, the first connecting tube 14 has a first positioning tube head 33 for fitting one end of the intermediate connecting tube, and the second connecting tube 24 has a second positioning tube head 39 for fitting the other end of the intermediate connecting tube.

[0060] To improve the relative consistency of assembly, see Figures 2-4 ,as well as Figure 6 and Figure 8 The first connecting pipe 14 is provided with a first positioning structure for axial positioning when the intermediate connecting pipe is connected to the first connecting pipe; correspondingly, the second connecting pipe 24 is provided with a second positioning structure for axial positioning when the intermediate connecting pipe is connected to the second connecting pipe 24.

[0061] As mentioned earlier, since one of the conditions for connecting the intermediate connecting pipe to the first connecting pipe 14 and the second connecting pipe 24 is that they are fitted together, the first positioning structure and the second positioning structure only need to provide axial positioning for the corresponding ends of the intermediate connecting pipe. One of the most common forms of providing axial positioning is a protrusion provided on the outer surface of the first connecting pipe 14 and the second connecting pipe 24. This protrusion can be a circumferentially distributed protrusion at a predetermined axial position on the first connecting pipe 14 and the second connecting pipe 24, or it can be an annular piece. Obviously, the annular piece can be a non-circular annular piece, but can be, for example, two symmetrically arranged fan rings, or more fan rings evenly distributed circumferentially at predetermined circumferential positions on the first connecting pipe 14 and the second connecting pipe 24.

[0062] When using a ring-shaped component, its overall integrity is relatively good. The ring-shaped component can be, for example, a stainless steel ring or a carbon structural steel ring, and is welded to the predetermined positions of the first connecting pipe 14 and the second connecting pipe 24 by welding. The ring-shaped component has three to six fixing holes, and both ends of the intermediate connecting component have flanges. The connection between the intermediate connecting component and the first connecting pipe 14 and the second connecting pipe 24 is a flange connection.

[0063] Accordingly, the hose or corrugated pipe is chemically bonded, integrally molded, or locked with the corresponding flange using hose clamps. In some implementations, such as with PU tubing, the flanges can be molded together during the molding process; however, in more implementations, the flanges at both ends of the PU tubing can be joined by heat fusion or locked using hose clamps. Chemical bonding is primarily achieved through adhesive bonding, suitable for lightweight connections; this is common knowledge in the field and will not be elaborated upon further.

[0064] exist Figure 4 In the illustrated structure, the first hose clamp 18 is used to connect the second flange 15 to one end of the PU steel wire connecting pipe 19, and the second hose clamp 20 is used to connect the third flange 21 to the other end of the PU steel wire connecting pipe 19. The connection between the PU steel wire connecting pipe 19 and the two flanges can be made after the two flanges are connected to the corresponding positioning plates, or the two flanges can be assembled on the PU steel wire connecting pipe 19 first, and then connected to the corresponding positioning plates.

[0065] Figure 9 A flange structure is shown in the figure, which includes a sleeve 41 and a flange 40 disposed at one end of the sleeve 41. Figure 4 The illustrated structure employs a composite sealing structure, primarily located between the two flanges and their corresponding positioning pipe heads; one example is shown below. The other uses a essentially identical sealing structure. Figure 4In the middle, a first sealing ring 16 is provided between the flange of the first positioning plate 17 and the flange of the second flange 15, and a third sealing ring 26 is provided between the sleeve 41 of the second flange 15 and the first positioning pipe head 33. The first sealing ring 16 and the third sealing ring 26 can be an integral structure, and the structural form is the same as that of the first positioning plate 17 and the second flange 15. Figure 9 The flange shown is similar, thus including a disc-shaped first sealing ring 16 and a sleeve-shaped third sealing ring 26 to facilitate integral assembly, and under the condition of integral assembly, the third sealing ring 26 does not require an additional positioning structure.

[0066] exist Figure 4 In the illustrated structure, the third sealing ring 26 is approximately flush with the end face of the first positioning tube head 33 at its right end in the figure. A fourth sealing ring 27 is provided at the end of the second positioning tube head 39. The fourth sealing ring 27 extends outward for a period of time. The extended portion is approximately equal to the distance between the first connecting tube 14 and the second connecting tube 24, thereby shielding the part of the space connecting the dust suction channel and the intermediate connecting tube, and improving the overall airtightness of the rotating arm connecting assembly 5.

[0067] Furthermore, the outer diameter of the first connecting pipe 14 is larger than the outer diameter of the second connecting pipe 24, and the inner diameter of the first connecting pipe 14 is smaller than the outer diameter of the second connecting pipe 24. In this case, assuming that the axis of the first connecting pipe 14 is collinear with the axis of the second connecting pipe 24, there will be a step between the outer contours of the first connecting pipe 14 and the second connecting pipe 24. The kick surface of this step is obviously provided by the end face of the first connecting pipe 14. Therefore, the fourth sealing ring 27 fitted on the second connecting pipe 24 is positioned on the second connecting pipe 24 and abuts against the corresponding end of the first connecting pipe, that is, against the kick surface of the corresponding step.

[0068] Furthermore, the third sealing ring 26 extends to the third end face and engages with the fourth sealing ring to form a relatively large sealing engagement surface, thereby improving the overall sealing capability.

[0069] exist Figure 6 and Figure 7 In the illustrated structure, a viewing window assembly is provided on the side of the first connecting pipe 14 to facilitate observation of the flow within the first connecting pipe 14, such as... Figure 6 The window 32 shown is prone to contamination on its inner surface, which gradually reduces its light transmittance. In a preferred embodiment, such windows 32 are fixed to the first connecting tube 14 in a detachable manner.

[0070] Furthermore, in Figure 7 As can be seen in the illustrated structure, a side opening 36 is opened at a selected position on the side of the first connecting pipe 14, and screw holes can be provided around the side opening 36. Then, screws are used to fix the window panel 38 to the first connecting pipe 14.

[0071] To improve the sealing performance of the window panel 38 assembly, a rectangular sealing ring can be provided around the side opening 36, such as... Figure 7 The seventh sealing ring 37 shown.

[0072] Given that some window panels 38 are not easily contaminated by dust and debris in the workshop, in other words, the maintenance cycle of window panels 38 is relatively long, in order to improve the reliability of assembly, rivets 35 can be used to replace screws, and window panels 38 can be fixed to the first connecting pipe 14 by riveting.

[0073] The above description is illustrative in conjunction with the accompanying drawings and is not intended to limit the scope of this utility model. Within the concept of this utility model, the above embodiments or different embodiments can be combined without conflict. Although the utility model has been described in detail in the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rotating arm connecting pipe assembly, characterized in that, include: A first connecting tube, the first end of which is used to connect to a vacuum tube; A second connecting pipe, the second end of which is used to connect to the main pipe of the rotating arm; and A flexible hose or corrugated pipe, one end of which is connected to the third end of the first connecting pipe, and the other end of which is connected to the fourth end of the second connecting pipe; Accordingly, the first end and the third end constitute the two ends of the first connecting pipe, and the second end and the fourth end constitute the two ends of the second connecting pipe.

2. The swing arm connecting pipe assembly according to claim 1, characterized in that, The distance between the third and fourth ends is 0.8mm to 50mm.

3. The swing arm connecting pipe assembly according to claim 2, characterized in that, The first connecting pipe is provided with a first positioning structure for axial positioning when the hose or corrugated pipe is connected to the first connecting pipe; The second connecting pipe is provided with a second positioning structure for axial positioning when the hose or corrugated pipe is connected to the second connecting pipe.

4. The swing arm connecting pipe assembly according to claim 3, characterized in that, Both the first positioning structure and the second positioning structure are annular components fixed on the corresponding connecting pipes; Correspondingly, the annular component has fixing holes; the hose or corrugated pipe is connected to the annular component by a flange.

5. The swing arm connecting pipe assembly according to claim 4, characterized in that, The hose or corrugated pipe is chemically bonded, integrally molded, or locked to the corresponding flange by a hose clamp.

6. The swing arm connecting pipe assembly according to claim 4, characterized in that, The flange includes a sleeve and a flange disposed at one end of the sleeve; Sealing elements are provided between the annular component and the corresponding flange, and between the sleeve and the corresponding connecting pipe.

7. The swing arm connecting pipe assembly according to claim 6, characterized in that, The outer diameter of the first connecting pipe is larger than the outer diameter of the second connecting pipe, and the inner diameter of the first connecting pipe is smaller than the outer diameter of the second connecting pipe. Accordingly, a fourth sealing ring is provided at the end of the second connecting pipe for connection with a hose or corrugated pipe, the fourth sealing ring being positioned on the second connecting pipe and abutting against the corresponding end of the first connecting pipe.

8. The swing arm connecting pipe assembly according to claim 7, characterized in that, The sealing element located between the first connecting pipe and the corresponding sleeve is a third sealing ring, which extends to the third end face and engages with the fourth sealing ring.

9. The swing arm connecting pipe assembly according to claim 1, characterized in that, The first end has a first flange, and three to eight flange fixing holes are distributed on the first flange. The flange fixing holes are elongated holes that extend laterally.

10. A dust collector, characterized in that, A dust collector having filter plates, and including a rotating arm for cleaning the filter plates, one end of the rotating arm's shaft being fitted with a collection pipe; The dust collector further includes the rotating arm connecting pipe assembly according to any one of claims 1 to 9, wherein the second connecting pipe in the rotating arm connecting pipe assembly is connected to the summing pipe.

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