Combined structure for fixing dense spiral air pipes

Abstract

The invention relates to the technical field of pipe fittings, in particular to a combined structure for fixing dense spiral air ducts, which comprises a pipe connecting frame, the pipe connecting frame is mounted between two dense spiral air ducts, two ends of the pipe connecting frame are provided with sleeving grooves, the sleeving grooves sleeve the end parts of the dense spiral air ducts, and the outer ring surface of the pipe connecting frame is provided with reserved grooves. External threads are arranged on the surface of the reserved groove, a clamping block is inserted into the surface of the reserved groove, a screw joint sleeve is sleeved with the reserved groove in a screw joint mode, the screw joint sleeve extrudes and pushes the clamping block to clamp the pipe connecting frame, a jacking plate is hinged to the outer ring face of the pipe connecting frame, the jacking plate abuts against one side of the screw joint sleeve, an assembling groove is formed in the outer ring face of the pipe connecting frame, and a sealing cover is inserted into the assembling groove. A filter plate is arranged on the inner ring surface of the sealing cover; the combined structure for fixing the dense spiral air pipes has the beneficial effects that the defects of a traditional connecting mode in the aspects of mounting, dismounting and sealing performance are overcome, the gas pre-cleaning function is added, and the overall performance of a system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fittings, and in particular to a combined structure for fixing dense spiral air ducts. Background Art

[0002] During the installation and use of dense spiral ducts, how to effectively fix two dense spiral ducts and ensure the sealing of the joints has always been an important issue.

[0003] Traditional connection methods, such as using flanges with multiple sets of bolts for connection, and the "Insulation structure of spiral air duct and its installation method" proposed in the publication number CN115451214A, choose to use clamps to connect and fix dense spiral air ducts; although it can achieve basic fixing functions, the installation process is cumbersome, requires a lot of time and manpower, and the sealing after connection is difficult to ensure. In addition, the existing connection method also lacks the function of pre-cleaning the conveying gas, which to a certain extent affects the operating efficiency and air quality of the system.

[0004] Therefore, a combined structure for fixing dense spiral air ducts is needed to solve the problem of cumbersome operation in the existing connection and fixation of dense spiral air ducts; it can realize tool-free fixation of two dense spiral air ducts while integrating gas pre-treatment and cleaning functions in the connecting pipes. Summary of the invention

[0005] The purpose of the present invention is to provide a combined structure for fixing dense spiral air ducts to solve the problem of complicated operation in the existing connection and fixation of dense spiral air ducts proposed in the above background technology; it can realize tool-free fixation of two dense spiral air ducts while integrating gas pre-treatment and cleaning functions in the connecting pipes.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined structure for fixing dense spiral air ducts, comprising a pipe connecting frame, which is installed between two dense spiral air ducts, and both ends of the pipe connecting frame are provided with sleeve grooves, which are sleeved on the ends of the dense spiral air ducts, and the outer ring surface of the pipe connecting frame is provided with a reserved groove, and the surface of the reserved groove is provided with an external thread, and a clamping block is inserted into the surface of the reserved groove, and the inner sleeve of the reserved groove is threaded with a screw sleeve, and the screw sleeve pushes the clamping block to clamp the pipe connecting frame, and the outer ring surface of the pipe connecting frame is hinged with a top support plate, and the top support plate is against one side of the screw sleeve, and the outer ring surface of the pipe connecting frame is provided with an assembly groove, and a sealing cover is inserted into the inner part of the assembly groove, and a filter plate is provided on the inner ring surface of the sealing cover.

[0007] Preferably, the sleeving groove is an annular groove. The circular tube between the inner ring surface of the sleeving groove and the inner ring surface of the pipe connection bracket is inserted into the pipe orifice of the dense spiral air duct. An embedding groove I is formed on the surface of the sleeving groove. The embedding groove I is an annular groove with a "C"-shaped port. A sealing snap ring is fixed inside the embedding groove I. The sealing snap ring protrudes from the embedding groove I and elastically deforms when clamped between the sleeving groove and the dense spiral air duct.

[0008] Preferably, the reserved groove is an annular groove. An insertion port is formed on the surface of the reserved groove. There are multiple insertion ports, and the multiple insertion ports are arranged in equal distance and equal size along the arc surface of the reserved groove. The clamping blocks correspond to the insertion ports one by one. The height of the clamping block is equal to the depth of the insertion port. One end of the clamping block extending towards the inside of the reserved groove is provided with an inclined surface, and the inclined surface faces the top support plate.

[0009] Preferably, inner ring grooves are formed at both ends of the pipe connection bracket. The inner ring grooves communicate with the sleeving groove. A rubber cover is inserted and fixed inside the inner ring grooves. The rubber cover is a "T"-shaped circular tube structure. When the screw sleeve squeezes and clamps the clamping block against the pipe connection bracket, the clamping block stretches the rubber cover to generate elastic deformation, and the rubber cover is clamped between the pipe connection bracket and the clamping block.

[0010] Preferably, a storage groove is formed on the outer ring surface of the pipe connection bracket. There are two groups of storage grooves, and the two groups of storage grooves are symmetrically distributed about the inner ring orifice of the pipe connection bracket. Each group of storage grooves has two, and the two storage grooves are arranged side by side. The storage groove communicates with the reserved groove. The depth of the storage groove is less than the depth of the reserved groove. A limiting shaft is fixed between the two parallel side walls of the storage groove, and the limiting shaft penetrates through the top support plate.

[0011] Preferably, an internal thread is provided at the inner ring orifice of the screw sleeve. The internal thread is in fit connection with the external thread. An edge groove is formed on the outer ring surface of the screw sleeve. The edge groove is an annular groove. After the top support plate extends out of the storage groove, one end of the top support plate abuts against the side wall of the edge groove.

[0012] Preferably, embedding grooves II are formed on the two parallel side walls of the storage groove. A stop block is movably inserted into the embedding groove II. The stop block is an "L"-shaped plate-like structure. A rubber support block is fixed in the groove body of the stop block, and the other end of the rubber support block is fixed on the surface of the embedding groove II. In the initial state, the rubber support block pushes the stop block to block on one side of the top support plate for limiting the top support plate.

[0013] Preferably, the assembly groove is a semi-circular groove. The sealing cover is a semi-circular ring plate-like structure with a "T"-shaped cross-section. Connecting blocks I are fixed at both ends of the sealing cover. Connecting blocks II are fixed on the outer wall of the pipe connection bracket. There are two connecting blocks II, and the two connecting blocks II are symmetrically distributed about the assembly groove. Through holes are formed on the surfaces of the connecting block I and the connecting block II, and the two groups of through holes are penetrated by the same bolt.

[0014] Preferably, the surface of the sealing cover is provided with an embedding groove three, which is an "L"-shaped annular groove. There are two embedding grooves three, which are symmetrically distributed about the middle plate body of the sealing cover. A sealing gasket is fixed inside the embedding groove three, which is a semicircular ring plate structure with an "L"-shaped cross-section. The thickness of the sealing gasket is greater than the depth of the embedding groove three. After the sealing cover is inserted into the assembly groove, the sealing gasket is clamped between the sealing cover and the pipe connection frame to generate elastic deformation.

[0015] Preferably, a connecting piece is fixed to the inner ring surface of the sealing cover, and the connecting piece is an arc-shaped plate structure. There are two connecting pieces, and the filter plate is inserted between the two connecting pieces. A fixing screw is threaded on the surface of the connecting piece, and the fixing screw passes through the connecting piece and is threaded on the surface of the filter plate. The inner ring diameter of the sealing cover is equal to the inner ring diameter of the pipe connection frame, and the plate body diameter of the filter plate is equal to the inner ring diameter of the sealing cover.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The combined structure for fixing dense spiral air ducts proposed in the present invention realizes the rapid installation and disassembly of two dense spiral air ducts through the cooperation of the pipe connecting frame and the clamping block, the screw sleeve and other structures, without the need for additional tools, thereby greatly improving the installation efficiency; the pipe connecting frame and the dense spiral air duct are stably fixed through the squeezing and pushing of the clamping block by the screw sleeve and the auxiliary fixation of the top support plate, and can remain firm even under strong wind or vibration conditions; a filter plate is added inside the pipe connecting frame to realize pre-cleaning treatment of the conveying gas, thereby improving the operating efficiency and air quality of the system; it not only solves the shortcomings of the traditional connection method in terms of installation, disassembly and sealing, but also adds a gas pre-cleaning function, improves the overall performance of the system, and has important practical application value; it further solves the problem of cumbersome operation existing in the connection and fixation of existing dense spiral air ducts; it can realize tool-free fixation of two dense spiral air ducts while integrating the gas pre-treatment cleaning function in the connecting pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle; Figure 3 for Figure 1 A magnified schematic diagram of the structure at B in the middle; Figure 4 It is a top view of the structure of the present invention; Figure 5 for Figure 4 Structural section view of the axis at the middle HH; Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle; Figure 7 for Figure 5 A magnified schematic diagram of the structure at D in the middle; Figure 8 This is a schematic diagram of the pipe connection frame structure of the present invention; Fig. 9 This is a schematic diagram of the connection structure between the sealing cover and the filter plate of the present invention; Fig.10 This is a schematic diagram of the sealing cover structure of the present invention; Fig.11 This is a schematic diagram of the distribution structure of the assembly slots in the pipe connection frame of the present invention; Fig.12 for Fig.11 The enlarged schematic diagram of the structure at E in the middle; Fig.13 for Fig.11 The enlarged schematic diagram of the structure at F in the middle; Fig.14 for Fig.12 Enlarged schematic diagram of the structure at G in the middle.

[0018] In the figure: pipe connection frame 1, sleeve groove 2, dense spiral air duct 3, embedded groove one 4, sealing buckle 5, reserved groove 6, socket 7, inner ring groove 8, rubber cover 9, clamping block 10, inclined surface 11, screw sleeve 12, side groove 13, storage groove 14, limit shaft 15, top support plate 16, embedded groove two 17, stopper 18, rubber support block 19, assembly groove 20, sealing cover 21, embedded groove three 22, sealing gasket 23, connecting piece 24, filter plate 25, fixing screw 26, connecting block one 27, connecting block two 28, through hole 29, bolt 30. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] For example, see Figures 1 to 5 as well as Figure 8As shown in the figure, the present invention provides a technical solution: a combined structure for fixing dense spiral air ducts, including a pipe connection frame 1, which is installed between two dense spiral air ducts 3. Both ends of the pipe connection frame 1 are provided with sleeving grooves 2, and the sleeving grooves 2 are sleeved on the ends of the dense spiral air ducts 3. The outer ring surface of the pipe connection frame 1 is provided with a reserved groove 6, and the surface of the reserved groove 6 is provided with external threads. A clamping block 10 is inserted on the surface of the reserved groove 6, and a screwed sleeve 12 is sleeved and screwed inside the reserved groove 6. The screwed sleeve 12 squeezes and pushes the clamping block 10 to clamp the pipe connection frame 1. The outer ring surface of the pipe connection frame 1 is hinged with a top support plate 16, and the top support plate 16 abuts against one side of the screwed sleeve 12. The outer ring surface of the pipe connection frame 1 is provided with an assembly groove 20, and a sealing cover 21 is inserted inside the assembly groove 20. The inner ring surface of the sealing cover 21 is provided with a filter plate 25; through the cooperation of the pipe connection frame 1, the clamping block 10, the screwed sleeve 12 and other structures, the rapid installation and disassembly of the two dense spiral air ducts 3 are realized, without the need to use additional tools, greatly improving the installation efficiency; through the squeezing of the clamping block 10 by the screwed sleeve 12 and the auxiliary fixation of the top support plate 16, the stable fixation of the pipe connection frame 1 and the dense spiral air duct 3 is realized, and it can remain firm even under large wind force or vibration conditions; by installing the filter plate 25 inside the pipe connection frame 1, the pre-cleaning treatment of the transported gas is realized, improving the operation efficiency and air quality of the system.

[0021] Embodiment 2. Referring to the attached Figure 6 As shown in the figure, on the basis of Embodiment 1, in order to achieve the sealing of the connection between the pipe connection frame 1 and the dense spiral air duct 3 after the pipe connection frame 1 is installed at the end of the dense spiral air duct 3, the sleeving groove 2 is an annular groove, and the round pipe between the inner ring surface of the sleeving groove 2 and the inner ring surface of the pipe connection frame 1 is inserted into the pipe orifice of the dense spiral air duct 3. The surface of the sleeving groove 2 is provided with an embedded groove 14, and the embedded groove 14 is an annular groove with a "C"-shaped port. A sealing snap ring 5 is fixed inside the embedded groove 14, and the sealing snap ring 5 protrudes from the embedded groove 14. The sealing snap ring 5 is clamped between the sleeving groove 2 and the dense spiral air duct 3 to generate elastic deformation.

[0022] A pipe connection frame 1 is installed between the two dense spiral air ducts 3 to replace the existing connection of the dense spiral air ducts 3 through a flange plate and a plurality of bolts. Only need to buckle the sleeving groove 2 at the end of the pipe connection frame 1 on the end of the dense spiral air duct 3. At this time, the sealing snap ring 5 is buckled on the end of the dense spiral air duct 3 to realize the sealing after the connection between the pipe connection frame 1 and the dense spiral air duct 3. Then rotate the screwed sleeve 12 to squeeze and push the clamping block 10 to clamp the pipe connection frame 1, so as to realize the quick assembly and sealing fixation of the two dense spiral air ducts 3; it should be noted that the pipe connection frame 1 is made of hard steel. Even if the end of the dense spiral air duct 3 is clamped and deformed, the end of the dense spiral air duct 3 is located between the inner ring surface and the outer ring surface of the pipe connection frame 1, that is, the inner ring of the pipe connection frame 1 acts as the stress point for the clamping block 10 to clamp the dense spiral air duct 3, so as to ensure that the dense spiral air duct 3 is firmly fixed in the sleeving groove 2.

[0023] Embodiment 3, refer to the attached Fig.12 and Fig.14 As shown, on the basis of the second embodiment, in order to realize the tool-free fixing of the pipe connecting frame 1 to the end of the dense spiral air duct 3, the reserved groove 6 is an annular groove, and a socket 7 is provided on the surface of the reserved groove 6. There are multiple sockets 7, and the multiple sockets 7 are arranged and distributed at equal distances and sizes along the arc surface of the reserved groove 6. The clamping block 10 corresponds to the socket 7 one by one, and the height of the clamping block 10 is equal to the depth of the socket 7. The end of the clamping block 10 extending to the inner side of the reserved groove 6 is provided with an inclined surface 11, and the inclined surface 11 faces the top support plate 16; inner annular grooves 8 are provided at both ends of the pipe connecting frame 1, and the inner annular grooves 8 are connected to the sleeve groove 2. A rubber cover 9 is fixed inside the inner annular groove 8, and the rubber cover 9 is a "T"-shaped circular tube structure. When the threaded sleeve 12 squeezes the clamping block 10 to clamp the pipe connecting frame 1, the clamping block 10 tensions the rubber cover 9 to produce elastic deformation, and the rubber cover 9 is clamped between the pipe connecting frame 1 and the clamping block 10.

[0024] When the threaded sleeve 12 covers and squeezes the clamping block 10, the clamping block 10 tensions the rubber cover 9 to clamp the pipe connection frame 1. The rubber cover 9 increases the friction between the clamping block 10 and the pipe connection frame 1 to ensure that the clamping block 10 firmly clamps the pipe connection frame 1. In order to facilitate the rotation of the threaded sleeve 12, two handles can be optionally fixed on the outer ring surface of the threaded sleeve 12. It is more labor-saving to hold the threaded sleeve 12 by hand.

[0025] In order to realize the stop and limit of the threaded sleeve 12, a receiving groove 14 is opened on the outer ring surface of the pipe connection frame 1. The receiving groove 14 is provided with two groups. The two groups of receiving grooves 14 are symmetrically distributed about the inner ring mouth of the pipe connection frame 1. Each group of receiving grooves 14 is provided with two, and the two receiving grooves 14 are distributed side by side. The receiving groove 14 is connected with the reserved groove 6. The depth of the receiving groove 14 is less than the depth of the reserved groove 6. A limiting shaft 15 is fixed between the two parallel side walls of the receiving groove 14. The limiting shaft 15 passes through the top support plate 16. The inner ring mouth of the threaded sleeve 12 is provided with an internal thread, and the internal thread and the external thread are matched and connected. The outer ring mouth of the threaded sleeve 12 A side groove 13 is provided on the annular surface, and the side groove 13 is an annular groove. After the top support plate 16 extends out from the storage groove 14, one end of the top support plate 16 rests on the side wall of the side groove 13; two parallel side walls of the storage groove 14 are provided with a second embedded groove 17, and a stopper 18 is movably inserted inside the second embedded groove 17. The stopper 18 is a "concave"-shaped plate structure, and a rubber support block 19 is fixed in the groove body of the stopper 18. The other end of the rubber support block 19 is fixed to the surface of the second embedded groove 17. In the initial state, the rubber support block 19 pushes the stopper 18 to block one side of the top support plate 16 for limiting the top support plate 16.

[0026] When the threaded sleeve 12 covers the clamping block 10, and one end of the threaded sleeve 12 rests on one side of the reserved groove 6, the top support plate 16 is pulled out from the receiving groove 14 and rests in the side groove 13, preventing the threaded sleeve 12 from moving in the direction of the receiving groove 14, thereby avoiding the hidden danger of the threaded sleeve 12 and the clamping block 10 being misaligned after the threaded sleeve 12 becomes loose. Once the clamping block 10 and the threaded sleeve 12 are misaligned, the rubber cover 9 rebounds and pushes the clamping block 10 backward, and the clamping block 10 no longer clamps the pipe connection frame 1, there is a hidden danger of the pipe connection frame 1 and the dense spiral air duct 3 falling off; and the top support plate 16 is blocked by the block 18 to prevent the top support plate 16 from being pulled out of the side groove 13.

[0027] When the pipe connecting frame 1 and the dense spiral air duct 3 need to be disassembled, two fingers are used to squeeze and push the two blocks 18 on both sides of the storage groove 14 respectively. After the block 18 is subjected to force, it retracts into the second embedding groove 17 to squeeze the rubber support block 19. When the block 18 no longer blocks one side of the top support plate 16, the top support plate 16 is rotated around the limit axis 15 as the center axis until the top support plate 16 is placed flat in the storage groove 14. At this time, the fingers are withdrawn from the front of the block 18, and the rubber support block 19 rebounds to push the block 18 to block one side of the top support plate 16, thereby preventing the top support plate 16 from swinging in the storage groove 14.

[0028] Embodiment 4, refer to the attached Figure 7 , Figures 9 to 11 as well as Fig.13 As shown, on the basis of the third embodiment, in order to realize the cleaning or replacement of the filter plate 25, the assembly groove 20 is a semicircular groove, the sealing cover 21 is a semicircular ring plate structure with a "T"-shaped cross section, and the two ends of the sealing cover 21 are fixed with a connecting block 1 27, and the outer wall of the pipe connection frame 1 is fixed with a connecting block 28, and there are two connecting blocks 28, and the two connecting blocks 28 are symmetrically distributed about the assembly groove 20. The surfaces of the connecting block 1 27 and the connecting block 28 are provided with through holes 29, and the two groups of through holes 29 are penetrated by the same bolt 30. The surface of the sealing cover 21 is provided with an embedded groove 3 22, and the embedded groove 3 22 is an "L"-shaped annular groove. There are two embedded grooves 3 22, and the two embedded grooves 3 22 are symmetrically distributed about the middle plate body of the sealing cover 21. A sealing gasket 23 is fixed inside the embedding groove three 22. The sealing gasket 23 is a semicircular ring plate structure with an "L"-shaped cross section. The thickness of the sealing gasket 23 is greater than the depth of the embedding groove three 22. After the sealing cover 21 is inserted into the assembly groove 20, the sealing gasket 23 is clamped between the sealing cover 21 and the pipe connection frame 1 to produce elastic deformation. A connecting piece 24 is fixed to the inner ring surface of the sealing cover 21. The connecting piece 24 is an arc-shaped plate structure. Two connecting pieces 24 are provided. The filter plate 25 is inserted between the two connecting pieces 24. The surface of the connecting piece 24 is screwed with a fixing screw 26. The fixing screw 26 penetrates the connecting piece 24 and is screwed to the surface of the filter plate 25. The inner ring diameter of the sealing cover 21 is equal to the inner ring diameter of the pipe connection frame 1, and the plate body diameter of the filter plate 25 is equal to the inner ring diameter of the sealing cover 21.

[0029] The reason why the filter plate 25 is installed inside the pipe connection frame 1 is to pre-clean the gas transported by the dense spiral air duct 3, and the filter plate 25 is detachable on the pipe connection frame 1, which is convenient for later replacement. At this time, the pipe connection frame 1 not only realizes the connection of two dense spiral air ducts 3, but also realizes the cleaning pre-treatment of the transported gas. The pipe connection frame 1 has multiple uses; when the filter plate 25 is installed inside the pipe connection frame 1, the sealing cover 21 is sealed on the outside of the assembly groove 20 to avoid leakage problems in the pipe connection frame 1; the filter plate 25 needs to be removed. During replacement, remove the bolts 30 from connecting block 1 27 and connecting block 2 28, then pull out the sealing cover 21 from the assembly groove 20, and pull out the sealing cover 21 carrying the filter plate 25 from the pipe connection frame 1. Then loosen the fixing screws 26 to detach from the filter plate 25, remove the filter plate 25, and replace it. It should be noted that it is recommended that the connecting piece 24 is set to a semicircular ring plate structure, and a plurality of fixing screws 26 are installed on the surface of the connecting piece 24 to improve the firmness of the filter plate 25 installed on the sealing cover 21.

[0030] Embodiment 5, based on Embodiment 4, proposes a method for using a combined structure for fixing dense spiral air ducts, comprising the following steps: The spooler 1 is then screwed onto the spooler 1 and the spooler 2 is screwed onto the spooler 1. The spooler 1 is screwed onto the spooler 1 and the spooler 2 is screwed onto the spooler 1. Step 2: When the threaded sleeve 12 covers and squeezes the clamping block 10, the clamping block 10 pulls the rubber cover 9 to clamp the pipe connection frame 1. The rubber cover 9 increases the friction between the clamping block 10 and the pipe connection frame 1 to ensure that the clamping block 10 firmly clamps the pipe connection frame 1. In order to facilitate the rotation of the threaded sleeve 12, two handles can be fixed on the outer ring surface of the threaded sleeve 12. It is more labor-saving to hold the threaded sleeve 12 by hand; Step 3: When the threaded sleeve 12 covers the clamping block 10, and one end of the threaded sleeve 12 abuts against one side of the reserved groove 6, the top support plate 16 is pulled out from the receiving groove 14 and abuts against the side groove 13, so as to prevent the threaded sleeve 12 from moving in the direction of the receiving groove 14, thereby preventing the threaded sleeve 12 from loosening and causing the hidden danger of the threaded sleeve 12 and the clamping block 10 being misaligned. Because once the clamping block 10 and the threaded sleeve 12 are misaligned, the rubber cover 9 rebounds and pushes the clamping block 10 backward, and the clamping block 10 no longer clamps the pipe connection frame 1, there is a hidden danger of the pipe connection frame 1 and the dense spiral air duct 3 falling off; and the top support plate 16 is blocked by the block 18 to prevent the top support plate 16 from being pulled out of the side groove 13; Step 4: When the pipe connection frame 1 and the dense spiral air duct 3 need to be separated, two fingers squeeze and push the two stoppers 18 on both sides of the storage groove 14 respectively. After the stoppers 18 are subjected to force, they retract into the second embedded groove 17 to squeeze the rubber support block 19. When the stoppers 18 are no longer blocking one side of the top support plate 16, the top support plate 16 is rotated around the limit axis 15 as the central axis until the top support plate 16 is placed flat in the storage groove 14. At this time, the fingers are withdrawn from the front of the stoppers 18, and the rubber support blocks 19 rebound to push the stoppers 18 to block one side of the top support plate 16, thereby preventing the top support plate 16 from swinging in the storage groove 14. Step 5: Installing the filter plate 25 inside the pipe connection frame 1 is to pre-clean the gas transported by the dense spiral air duct 3, and the filter plate 25 is detachable on the pipe connection frame 1, which is convenient for later replacement. At this time, the pipe connection frame 1 not only realizes the connection of the two dense spiral air ducts 3, but also realizes the cleaning pre-treatment of the transported gas. The pipe connection frame 1 has multiple uses; when the filter plate 25 is installed inside the pipe connection frame 1, the sealing cover 21 is sealed on the outside of the assembly groove 20 to avoid leakage problems in the pipe connection frame 1; the filter plate 25 needs to be installed inside the pipe connection frame 1. During replacement, remove the bolts 30 from connecting block 1 27 and connecting block 2 28, then pull out the sealing cover 21 from the assembly groove 20, and pull out the sealing cover 21 carrying the filter plate 25 from the pipe connection frame 1. Then loosen the fixing screws 26 to detach from the filter plate 25, remove the filter plate 25, and replace it. It should be noted that it is recommended that the connecting piece 24 is set to a semicircular ring plate structure, and a plurality of fixing screws 26 are installed on the surface of the connecting piece 24 to improve the firmness of the filter plate 25 installed on the sealing cover 21.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined structure for fixing dense spiral air ducts, comprising a pipe connecting frame (1), the pipe connecting frame (1) being installed between two dense spiral air ducts (3), characterized in that: Both ends of the pipe connection bracket (1) are provided with sleeve grooves (2), the sleeve grooves (2) are sleeved on the ends of the dense spiral air duct (3), a reserved groove (6) is formed on the outer ring surface of the pipe connection bracket (1), external threads are provided on the surface of the reserved groove (6), a clamping block (10) is inserted on the surface of the reserved groove (6), a screwed sleeve (12) is sleeved and screwed inside the reserved groove (6), the screwed sleeve (12) squeezes and pushes the clamping block (10) to clamp the pipe connection bracket (1), a top support plate (16) is hinged on the outer ring surface of the pipe connection bracket (1), the top support plate (16) abuts against one side of the screwed sleeve (12), an assembly groove (20) is formed on the outer ring surface of the pipe connection bracket (1), a sealing cover (21) is inserted inside the assembly groove (20), and a filter plate (25) is provided on the inner ring surface of the sealing cover (21).

2. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: The sleeve groove (2) is an annular groove, and the circular pipe between the inner ring surface of the sleeve groove (2) and the inner ring surface of the pipe connection bracket (1) is inserted into the pipe orifice of the dense spiral air duct (3). An embedded groove I (4) is formed on the surface of the sleeve groove (2), the embedded groove I (4) is an annular groove with a "C"-shaped port, a sealing snap ring (5) is fixed inside the embedded groove I (4), the sealing snap ring (5) protrudes from the embedded groove I (4), and the sealing snap ring (5) is elastically deformed when clamping between the sleeve groove (2) and the dense spiral air duct (3).

3. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: The reserved groove (6) is an annular groove, an insertion opening (7) is formed on the surface of the reserved groove (6), there are multiple insertion openings (7), and the multiple insertion openings (7) are arranged and distributed at equal distances and equal sizes along the arc surface of the reserved groove (6). The clamping blocks (10) and the insertion openings (7) are in one-to-one correspondence, the height of the clamping block (10) is equal to the depth of the insertion opening (7), and a slope (11) is provided at the end of the clamping block (10) extending towards the inside of the reserved groove (6), and the slope (11) faces the top support plate (16).

4. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: Inner ring grooves (8) are formed at both ends of the pipe connection bracket (1), the inner ring grooves (8) communicate with the sleeve grooves (2), a rubber cover (9) is inserted and fixed inside the inner ring grooves (8), the rubber cover (9) is in a "T"-shaped circular pipe structure, when the screwed sleeve (12) squeezes and pushes the clamping block (10) to clamp the pipe connection bracket (1), the clamping block (10) stretches the rubber cover (9) to generate elastic deformation, and the rubber cover (9) is clamped between the pipe connection bracket (1) and the clamping block (10).

5. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: Receiving grooves (14) are formed on the outer ring surface of the pipe connection bracket (1), there are two groups of receiving grooves (14), and the two groups of receiving grooves (14) are symmetrically distributed about the inner ring orifice of the pipe connection bracket (1). Each group of receiving grooves (14) has two, and the two receiving grooves (14) are arranged side by side. The receiving grooves (14) communicate with the reserved grooves (6), the depth of the receiving grooves (14) is less than the depth of the reserved grooves (6), a limiting shaft (15) is fixed between the two parallel side walls of the receiving grooves (14), and the limiting shaft (15) penetrates through the top support plate (16).

6. The combined structure for fixing dense spiral air ducts according to claim 5, characterized in that: The inner ring opening of the screw sleeve (12) is provided with an internal thread, the internal thread and the external thread are connected in cooperation, the outer ring surface of the screw sleeve (12) is provided with a side groove (13), the side groove (13) is an annular groove, and after the top support plate (16) extends from the receiving groove (14), one end of the top support plate (16) abuts against the side wall of the side groove (13).

7. The combined structure for fixing dense spiral air ducts according to claim 5, characterized in that: The two parallel side walls of the storage groove (14) are each provided with a second embedding groove (17), a stopper (18) is movably inserted into the interior of the second embedding groove (17), the stopper (18) being a "concave"-shaped plate-like structure, a rubber support block (19) being fixed in the groove body of the stopper (18), the other end of the rubber support block (19) being fixed to the surface of the second embedding groove (17), and the rubber support block (19) in an initial state pushes the stopper (18) to block one side of the top support plate (16), so as to limit the position of the top support plate (16).

8. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: The assembly groove (20) is a semicircular groove, the sealing cover (21) is a semicircular ring plate structure with a "T"-shaped cross section, and a connecting block 1 (27) is fixed to both ends of the sealing cover (21), and a connecting block 2 (28) is fixed to the outer wall of the pipe connection frame (1). There are two connecting blocks 2 (28), and the two connecting blocks 2 (28) are symmetrically distributed with respect to the assembly groove (20). The surfaces of the connecting block 1 (27) and the connecting block 2 (28) are both provided with through holes (29), and the two groups of through holes (29) are penetrated by the same bolt (30).

9. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: The surface of the sealing cover (21) is provided with an embedding groove three (22), which is an L-shaped annular groove. There are two embedding grooves three (22), which are symmetrically distributed about the middle plate body of the sealing cover (21). A sealing gasket (23) is fixed inside the embedding groove three (22), which is a semicircular ring plate structure with an L-shaped cross section. The thickness of the sealing gasket (23) is greater than the depth of the embedding groove three (22). After the sealing cover (21) is inserted into the assembly groove (20), the sealing gasket (23) is clamped between the sealing cover (21) and the pipe connection frame (1) to generate elastic deformation.

10. The combined structure for fixing dense spiral air ducts according to claim 1, characterized in that: A connecting piece (24) is fixed to the inner ring surface of the sealing cover (21), the connecting piece (24) is in an arc-shaped plate-like structure, two connecting pieces (24) are provided, the filter plate (25) is inserted between the two connecting pieces (24), a fixing screw (26) is screwed to the surface of the connecting piece (24), the fixing screw (26) penetrates the connecting piece (24) and is screwed to the surface of the filter plate (25), the inner ring diameter of the sealing cover (21) is equal to the inner ring diameter of the pipe connection frame (1), and the plate body diameter of the filter plate (25) is equal to the inner ring diameter of the sealing cover (21).

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