Mining negative pressure ventilation dust removal device with air duct

Abstract

The invention discloses a mining negative-pressure ventilation and dust removal device with an air duct, and relates to the technical field of mine ventilation safety. The air duct comprises air duct cloth and a spiral framework, circular rings are connected to the two ends of the spiral framework respectively, and connecting rings are connected to the circular rings through a plurality of connecting columns; the two ends of the air duct cloth are fixed to the circular rings and protrude out of the circular rings to form extending parts. The connecting piece comprises a ring body, an annular sealing groove is formed in the outer wall of the ring body, and mounting grooves used for mounting the connecting ring are formed in the two sides of the ring body respectively. The connecting rings are connected to the circular rings at the two ends of the spiral framework through the connecting columns, the two air ducts are connected through the connecting piece during use, the annular sealing groove is formed in the outer wall of the connecting piece, and the mounting grooves used for mounting the connecting rings are formed in the two sides of the connecting piece correspondingly; and therefore, two adjacent air ducts can be conveniently connected in a sealed manner during use.

Description

Technical Field

[0001] The present invention belongs to the technical field of mine ventilation safety, and particularly relates to a mine negative pressure ventilation and dust removal device with a ventilation duct. Background Art

[0002] A ventilation duct is a flexible pipe used in coal mines, tunnels, subway projects, and underground local areas to guide the air flow along a certain direction. A negative pressure ventilation duct means that when the ventilation duct is working, the atmospheric pressure inside the duct is lower than the atmospheric pressure inside the duct, and it is generally used for exhaust-type guiding ventilation.

[0003] In the prior art, common ones are mostly flexible ventilation ducts. The main body of this kind of ventilation duct is usually made of materials such as leather, plastic, canvas, and rubber. Multiple steel rings are arranged inside each section of the ventilation duct main body as skeletons. When splicing two sections of ventilation ducts together, it is necessary to squeeze the steel ring at one end of one section of the ventilation duct to make it deformed so as to insert the current section of the ventilation duct into the inside of the other section of the ventilation duct to complete the splicing work of the two sections of ventilation ducts. This method is relatively simple and convenient. However, during long-term use, the steel ring at the end of the ventilation duct will also be repeatedly squeezed and deformed, so that the steel ring may gradually lose its original elasticity, and then the sealing performance at the connection of the ventilation duct is reduced, affecting the ventilation effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a mine negative pressure ventilation and dust removal device with a ventilation duct. By connecting connection rings on the rings at both ends of the spiral skeleton through a plurality of connecting columns and connecting between two ventilation ducts through a connecting piece during use, the connecting piece has an annular sealing groove on its outer wall and installation grooves for installing connection rings are respectively arranged on both sides, which solves the problems raised in the prior art background.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention is a mine negative pressure ventilation and dust removal device with a ventilation duct, including a ventilation duct assembly composed of a plurality of sequentially connected ventilation ducts. One end of the ventilation duct assembly is connected to the air inlet end of a dust removal box body, and the air outlet end of the dust removal box body is connected to the air inlet end of a multi-stage fan; the other end of the ventilation duct assembly is connected to a collector; adjacent two ventilation ducts are connected through a connecting piece; the ventilation duct includes a ventilation duct cloth and a spiral skeleton, and rings are respectively connected to both ends of the spiral skeleton. Connection rings are connected to the rings through a plurality of connecting columns; both ends of the ventilation duct cloth are fixed on the rings and protrude from the rings to form extension parts; the connecting piece includes a ring body, an annular sealing groove is arranged on the outer wall of the ring body, and installation grooves for installing connection rings are respectively arranged on both sides of the ring body; during installation, the connection rings at the ends of the two ventilation ducts are inserted into the two installation grooves on both sides of the ring body; then control the extension parts to flip and tie and fix the extension parts at the ends of the two ventilation ducts in the annular sealing groove.

[0006] Further, the spiral skeleton is disposed inside the tubular air duct cloth; the spiral skeleton is fixed to the inner side wall of the air duct cloth by a strip cloth; the air duct cloth is formed by calendering and laminating a glass fiber cloth and a plastic material.

[0007] Further, a plurality of fixing modules are arranged on the ring body on one side of the installation groove. The fixing module includes a rectangular groove opened on the ring body, a rectangular movable column is arranged in cooperation with the rectangular groove, and an abutting plate abuting against the connecting ring is connected to the end of the rectangular movable column; a threaded blind hole is arranged on the bottom side surface of the rectangular groove, and a bolt A is threadedly connected to the threaded blind hole. A through hole for the bolt A to pass through movably is arranged on the rectangular movable column.

[0008] Further, it further includes a suspension mechanism fixed to the top of the mine tunnel; the suspension mechanism includes a fixing part fixed to the top of the mine tunnel, a supporting part connected to the annular sealing groove and tightening the extension part in the annular sealing groove, and a connecting part connecting the fixing part and the supporting part; the fixing part includes a rectangular plate, and L-shaped flanges are arranged on both sides of the rectangular plate; the connecting part includes two connecting rods A installed on the rectangular plate, and a mounting seat is installed at the end of the connecting rod A; the supporting part includes a cooperating hoop A and hoop B, and the hoop A and hoop B are cooperatively installed on the mounting seat.

[0009] Further, a through hole A for the connecting rod A to pass through is opened on the mounting seat, and a nut A abuting against the bottom side surface of the mounting seat is threadedly connected to the end of the connecting rod A; a rectangular notch is opened on one side of the mounting seat, and a mounting hole A is arranged on the bottom side surface of the rectangular notch; connecting blocks A and B are respectively arranged at both ends of the hoop A and hoop B, and mounting holes B and C cooperating with the mounting hole A are respectively arranged on the connecting blocks A and B; during installation, control the fixing bolt to pass through the mounting hole A, the mounting hole C and the mounting hole B, and threadedly connect a fixing nut at the end.

[0010] Further, a plurality of pairs of pressing modules for pressing and fixing the extension part in the annular sealing groove are arranged inside the hoop A and the hoop B; the pressing module includes a rubber block with an arc-shaped inner side, and a plurality of through holes B are arranged on the rubber block.

[0011] Further, the connecting part further includes a connecting rod B installed on the rectangular plate between the two connecting rods A; nuts B abuting against the rectangular plate are threadedly connected to both the connecting rod A and the connecting rod B; a limiting plate is arranged at the end of the connecting rod B, and a connecting plate is rotatably installed at the end; two stud bolts penetrate through the connecting plate, and nuts C abuting against the connecting plate are threadedly connected to the ends of the stud bolts; the bottom ends of the two stud bolts are connected to a connecting sleeve, a connecting block inserted into the connecting sleeve is arranged on the outer side wall of the hoop A, and a locking bolt A is arranged on the connecting sleeve.

[0012] Further, a cross bar is connected between the two suspension mechanisms, and a plurality of hanging mechanisms are equidistantly installed on the cross bar along its length direction; a connecting seat is installed on the two stud bolts located between the connecting sleeve and the connecting plate. A jack for inserting the cross bar is provided on the connecting seat, and locking bolts B are threadedly connected to both the upper and lower surfaces.

[0013] Further, the cross bar includes a rod body. Insertion rods for inserting into the jacks are provided at both ends of the rod body. The diameter of the insertion rod is equivalent to the size of the jack, and the diameter of the cross bar is larger than that of the insertion rod; a connecting column with a semi-circular cross section is provided at the end of the insertion rod. A groove A is provided on the arc surface of the connecting column, and a through hole A is provided on the bottom side of the groove A; during installation, when the connecting column is inserted into the jack, rotate the locking bolt B until the end of the locking bolt B abuts against the bottom side of the groove A; the diameter of the locking bolt B is between the groove and the through hole.

[0014] Further, the hanging mechanism includes a collar sleeved on the rod body, and a convex column is connected to one side of the collar; a groove B is provided on the inner wall of the collar, and a through hole B that is communicated with the groove B and has a concentric structure is provided on the convex column; further included is a column head that is placed at the groove B. A vertical rod with a diameter equivalent to that of the through hole B is connected to the end of the column head. A connecting rod is connected to the end of the vertical rod, a hook rod is connected to the end of the connecting rod, and a hook body is connected to the end of the hook rod; a notch for the connecting rod to pass through is provided on one side of the convex column.

[0015] The present invention has the following beneficial effects: In the present invention, connection rings are connected to the rings at both ends of the spiral skeleton through a plurality of connecting columns, and during use, the two air ducts are connected through a connecting member. An annular sealing groove is provided on the outer wall of the connecting member, and mounting grooves for mounting the connection rings are respectively provided on both sides, so that it is convenient to hermetically connect two adjacent air ducts during use.

[0016] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the air duct structure of the present invention; Figure 2Schematic diagram of the matching structure of the air duct and the connector of the present invention; Figure 3 is Figure 2 Partial enlarged view at A in; Figure 4 Schematic diagram of the connector structure of the present invention; Figure 5 is Figure 4 front view of; Figure 6 Schematic diagram of the air duct installation structure of the present invention Figure 1 ; Figure 7 Schematic diagram of the suspension mechanism of the present invention; Figure 8 is Figure 7 Partial enlarged view at B in; Figure 9 is Figure 7 Partial enlarged view at E in; Figure 10 Second schematic diagram of the air duct installation structure of the present invention; Figure 11 is Figure 10 Partial enlarged view at C in; Figure 12 Schematic diagram of the cross bar structure of the present invention; Figure 13 is Figure 12 Partial enlarged view at D in; Figure 14 Schematic diagram of the hanging mechanism of the present invention; Figure 15 Cross-sectional view of the hanging mechanism of the present invention; Figure 16 is Figure 15 Partial enlarged view at F in; In the attached drawings, the list of components represented by each reference numeral is as follows: Air duct, 1; connecting piece, 2; spiral skeleton, 10; ring, 11; connecting column, 12; connecting ring, 13; air duct cloth, 14; extension part, 15; ring body, 20; annular sealing groove, 21; installation groove, 22; rectangular groove, 23; rectangular movable column, 24; pressing plate, 25; bolt A, 26; suspension mechanism, 3; rectangular plate, 30; L-shaped flange, 301; connecting rod A, 31; nut A, 311; mounting seat, 35; hoop A, 36; hoop B, 37; connecting block A, 361; mounting hole B, 362; rubber block, 39; arc surface, 391; connecting rod B, 32; connecting plate, 33; stud, 331; nut C, 332; connecting sleeve, 333; locking bolt A, 334; cross bar, 4; hanging mechanism, 5; connecting seat, 34; jack, 341; locking bolt B, 342; rod body, 40; inserting rod, 41; connecting column, 42; groove A, 43; through hole A, 44; collar, 50; convex column, 51; groove B, 501; through hole B, 51; notch, 512; column head, 52; vertical rod, 53; connecting rod, 54; hook rod, 55; hook body, 56; Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "opening A", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientations or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0021] Please refer to Figure 1-2 As shown, the present invention is a mine negative pressure ventilation and dust removal device with an air duct, including an air duct assembly composed of multiple sections of flexible air ducts 1 connected in series through connecting pieces 2. The first end of the air duct assembly is connected to a collector (diffusion angle 30°, length 1.2 m), and the end is connected to a KCS-450D wet dust removal box body, and the dust removal box body is connected to a multi-stage fan; the multi-stage fan is selected as an FBCDZ-No.28 counter-rotating fan (air volume 48 m³ / s, negative pressure 6800 Pa), and the air duct is fully unfolded within 10 seconds after startup.

[0022] As Figure 1-2, the air duct 1 includes an air duct cloth 14 and a spiral skeleton 10. The spiral skeleton 10 is made of 65Mn spring steel (wire diameter 8 mm, pitch 150 mm) and is combined with the air duct cloth 14 through a hot vulcanization process. The air duct cloth is formed by thermocompression lamination of an outer 0.8 mm flame-retardant PVC film and an inner glass fiber woven cloth (grammage 320 g / m²). The two ends of the spiral skeleton 10 are respectively connected to a ring 11, and a connecting ring 13 is connected to the ring 11 through a number of connecting columns 12; the two ends of the air duct cloth 14 are fixed on the ring 11 and protrude from the ring 11 to form an extension part 15.

[0023] Based on the above specific structural settings of the air duct 1, in order to facilitate the connection between the connector 2 and the air duct 1, such as Figures 3-5 , the provided connector 2 includes a ring body 20. An annular sealing groove 21 is provided on the outer wall of the ring body 20, and mounting grooves 22 for mounting the connecting ring 13 are respectively provided on both sides of the ring body 20; during installation, the connecting rings 13 at the ends of the two air ducts 1 are inserted into the two mounting grooves 22 on both sides of the ring body 20, and CX-288 sealant is pre-coated in the mounting grooves 22; then, control the extension part 15 to flip and tie and fix the extension parts 15 at the ends of the two air ducts 1 in the annular sealing groove 21. The measured air leakage rate of the interface < 1.5%.

[0024] In order to facilitate the fixing after the control connecting ring 13 is inserted into the mounting groove 22 and prevent the connecting ring 13 from detaching from the inside of the mounting groove 22 under force, a number of fixing modules are provided on the ring body 20 on one side of the mounting groove 22. The fixing module includes a rectangular groove 23 opened on the ring body 20. A rectangular movable column 24 is arranged in cooperation with the rectangular groove 23. A pressing plate 25 pressing against the connecting ring 13 is connected to the end of the rectangular movable column 24; a threaded blind hole is provided on the bottom side of the rectangular groove 23, and a bolt A26 is threadedly connected to the threaded blind hole. A through hole for the bolt A26 to pass through movably is provided on the rectangular movable column 24. Then, during use, when the control connecting ring 13 is inserted into the mounting groove 22, the rectangular movable column 24 is installed in the rectangular groove 23 through the bolt A26. At this time, ensure that the pressing plate 25 presses against the connecting ring 13.

[0025] In the above, when there is local damage, it can be quickly replaced by loosening the single-point bolt, shortening the maintenance time.

[0026] It can be known that during actual operation, in order to facilitate the installation of the air duct assembly into the mine roadway; such as Figures 6-8, in one embodiment of the present invention, a suspension installation is adopted, that is, a suspension mechanism 3 is fixed at the top of the mine roadway during installation; the suspension mechanism 3 includes a fixed part fixed at the top of the mine roadway, a support part connected to the annular sealing groove 21 and tightening the extension part 15 in the annular sealing groove 21, and a connection part connecting the fixed part and the support part; the fixed part includes a rectangular plate 30, and L-shaped flanges 301 are arranged on both sides of the rectangular plate 30; the connection part includes two connecting rods A31 installed on the rectangular plate 30, and mounting seats 35 are installed at the ends of the connecting rods A31; the support part includes a cooperating hoop A36 and hoop B37, and the hoop A36 and hoop B37 are cooperatively installed on the mounting seats 35.

[0027] Specifically, the mounting seat 35 is provided with an opening A350 for the connecting rod A31 to pass through, and a nut A311 abutting against the bottom side of the mounting seat 35 is threadedly connected to the end of the connecting rod A31; a rectangular notch 351 is opened on one side of the mounting seat 35, and a mounting hole A is provided on the bottom side of the rectangular notch 351; connecting blocks A361 and B371 are respectively arranged at both ends of the hoop A36 and hoop B37, and mounting holes B362 and C respectively cooperating with the mounting hole A are provided on the connecting blocks A361 and B371; during installation, control the fixing bolt to pass through the mounting hole A, mounting hole C and mounting hole B362, and threadedly connect a fixing nut at its end.

[0028] Specifically, the installation of the suspension system includes: Step 1: Fix the rectangular plate 30 to the concrete roof with chemical anchor bolts, the anchoring depth is 120 mm, and the pull-out force test value > 85 kN; Step 2: Sleeve the hoop A36 and hoop B37 at the sealing groove, and pre-tighten the connecting blocks A361 and B371 with M16 bolts; Step 3: Rotate the nut A311 to adjust the length of the connecting rod A31 so that the deviation of the air duct center line < 3‰; Step 4: Under the condition of the fan running at full speed, the amplitude of the suspension point < 0.15 mm, meeting the installation standard of the conveying equipment in GB 50431-2008.

[0029] Several pairs of pressing modules for pressing and fixing the extension part 15 in the annular sealing groove 21 are arranged inside both the hoop A36 and hoop B37; the pressing module includes a rubber block 39 with an inner arc surface 391, and several opening Bs are arranged on the rubber block 39; the rubber block 39 in the pressing module realizes dynamic sealing through a pre-compression amount of 2.5 mm.

[0030] During use, in order to prevent the hoop assembly composed of the hoop A36 and hoop B37 from deflecting when supporting the connecting piece 2 during the suspension process; as Figure 7, the provided connecting part further includes a connecting rod B32 installed on the rectangular plate 30 between two connecting rods A31; a limiting plate is provided at the end of the connecting rod B32, and a connecting plate 33 is rotatably installed at the end. Two stud bolts 331 penetrate through the connecting plate 33, and a nut C332 that abuts against the connecting plate 33 is threadedly connected to the end of the stud bolt 331; the bottom ends of the two stud bolts 331 are connected to a connecting sleeve 333, and a connecting block inserted into the connecting sleeve 333 is provided on the outer side wall of the hoop A36, and a locking bolt A334 is provided on the connecting sleeve 333.

[0031] In the above, as Figure 9 , in order to ensure the stability after the installation of the connecting rod A31 and the connecting rod B32, nuts B that abut against the rectangular plate 30 are threadedly connected to both the connecting rod A31 and the connecting rod B32; and end plates 312 that abut against the upper surface of the rectangular plate 30 are integrally formed at the ends of both the connecting rod A31 and the connecting rod B32. A recessed part 313 is provided on the end plate 312, and an elastic rubber block 314 is provided in the recessed part 313. During installation, the elastic rubber block 314 abuts against the concrete roof slab.

[0032] In order to construct an extended ventilation network, as Figure 10 , a cross bar 4 is connected between two adjacent suspension mechanisms 3, and a plurality of hanging mechanisms 5 are installed at equal intervals along the length direction of the cross bar 4; the hanging mechanisms 5 are hooked on the outer wall of the air duct 1.

[0033] Specifically, connection seats 34 are installed on the two stud bolts 331 located between the connecting sleeve 333 and the connecting plate 33. A jack 341 for inserting the cross bar 4 is provided on the connection seat 34, and locking bolts B342 are threadedly connected to both the upper and lower surfaces.

[0034] Based on the above, in order to facilitate the fixed installation of the cross bar 4, as Figures 11-13 , the cross bar 4 provided by the present invention includes a rod body 40. Plug rods 41 for inserting into the jacks 341 are provided at both ends of the rod body 40. The diameter of the plug rod 41 is equivalent to the size of the jack 341, and the diameter of the cross bar 4 is larger than that of the plug rod 41; a connecting column 42 with a semi-circular cross section is provided at the end of the plug rod 41. A groove A43 is provided on the arc surface of the connecting column 42, and a through hole A44 is provided on the bottom side surface of the groove A43; during installation, when the connecting column 42 is inserted into the jack 341, the locking bolt B342 is rotated until the end of the locking bolt B342 abuts against the bottom side surface of the groove A43; the diameter of the locking bolt B342 is between the groove 43 and the through hole 44.

[0035] In order to control the hanging mechanism 5 to be hooked on the outer wall of the air duct 1 during use, hanging rings that cooperate with the hanging mechanism 5 are provided on the outer wall of the air duct 1.

[0036] That is, when controlling the hanging mechanism 5 to cooperate and hook onto the hanging ring, it is necessary to control the rotation of the hook body that cooperates with the hanging ring. In actual use, such as Figures 14-16 , the provided hanging mechanism 5 includes a collar 50 sleeved on the rod body 40, and a convex column 51 is connected to one side of the collar 50; a groove B501 is provided on the inner wall of the collar 50, and a through hole B511 that communicates with the groove B501 and has a concentric structure is provided on the convex column 51; it also includes a column head 52 that is placed on the groove B501, a vertical rod 53 with a diameter equivalent to that of the through hole B511 is connected to the end of the column head 52, a connecting rod 54 is connected to the end of the vertical rod 53, a hook rod 55 is connected to the end of the connecting rod 54, and a hook body 56 is connected to the end of the hook rod 55; a notch 512 for the connecting rod 54 to pass through is provided on one side of the convex column 51.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0038] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, according to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A mine negative pressure ventilation and dust removal device with a blower, characterized in that: It includes a duct assembly composed of several sequentially connected ducts (1). One end of the duct assembly is connected to the air inlet end of the dust removal box body, and the air outlet end of the dust removal box body is connected to the air inlet end of the multi-stage fan; the other end of the duct assembly is connected with a collector; Two adjacent ducts (1) are connected by a connecting piece (2); The duct (1) includes a duct cloth (14) and a spiral skeleton (10), and circular rings (11) are respectively connected to both ends of the spiral skeleton (10). A connecting ring (13) is connected to the circular ring (11) through several connecting columns (12); both ends of the duct cloth (14) are fixed on the circular ring (11), and an extension part (15) protrudes from the circular ring (11); The connecting piece (2) includes a ring body (20). An annular sealing groove (21) is arranged on the outer wall of the ring body (20), and mounting grooves (22) for mounting the connecting ring (13) are respectively arranged on both sides of the ring body (20); During installation, the connecting rings (13) at the ends of the two ducts (1) are inserted into the two mounting grooves (22) on both sides of the ring body (20); then, the extension part (15) is controlled to turn over, and the extension parts (15) at the ends of the two ducts (1) are tightly tied and fixed in the annular sealing groove (21).

2. The mine negative pressure ventilation and dust removal device with a blower according to claim 1, characterized in that The spiral skeleton (10) is arranged inside the tubular duct cloth (14); the spiral skeleton (10) is fixed on the inner side wall of the duct cloth (14) through a pressing strip cloth; the duct cloth is formed by calendering and laminating a glass fiber cloth and a plastic material.

3. The mine negative pressure ventilation and dust removal device with a blower according to claim 1, characterized in that, Several fixing modules are arranged on the ring body (20) on one side of the mounting groove (22). The fixing module includes a rectangular groove (23) opened on the ring body (20), a rectangular movable column (24) is arranged in cooperation with the rectangular groove (23), and an abutting plate (25) abutting against the connecting ring (13) is connected to the end of the rectangular movable column (24); a threaded blind hole is arranged on the bottom side surface of the rectangular groove (23), and a bolt A (26) is threadedly connected to the threaded blind hole. A through hole for the bolt A (26) to movably penetrate is arranged on the rectangular movable column (24).

4. The mine negative pressure ventilation and dust removal device with a hair dryer according to any one of claims 1-3, characterized in that It also includes a suspension mechanism (3) fixed on the top of the mine roadway; The suspension mechanism (3) includes a fixing part fixed on the top of the mine roadway, a supporting part connected to the annular sealing groove (21) and tightening the extension part (15) in the annular sealing groove (21), and a connecting part connecting the fixing part and the supporting part; The fixing part includes a rectangular plate (30), and L-shaped flanges (301) are arranged on both sides of the rectangular plate (30); The connecting part includes two connecting rods A (31) installed on the rectangular plate (30), and a mounting seat (35) is installed at the end of the connecting rod A (31); The supporting part includes a cooperating hoop A (36) and hoop B (37), and the hoop A (36) and hoop B (37) are cooperatively installed on the mounting seat (35).

5. The mine negative pressure ventilation and dust removal device with a hair dryer according to claim 4, characterized in that, The mounting base (35) is provided with a through-hole A (350) for the connecting rod A (31) to pass through, and a nut A (311) is threadedly connected to the end of the connecting rod A (31) and abuts against the bottom side surface of the mounting base (35); a rectangular notch (351) is provided on one side of the mounting base (35), and a mounting hole A is provided on the bottom side surface of the rectangular notch (351). The two ends of the hoop A (36) and the hoop B (37) are respectively provided with a connecting block A (361) and a connecting block B (371), and mounting holes B (362) and mounting holes C which are matched with the mounting hole A are respectively provided on the connecting block A (361) and the connecting block B (371). During installation, control the fixing bolt to pass through the mounting hole A, the mounting hole C and the mounting hole B (362), and threadedly connect a fixing nut at the end thereof.

6. The mine negative pressure ventilation and dust removal device with a blower according to claim 5, characterized in that, A plurality of pairs of pressing modules for pressing and fixing the extending portions (15) located in the annular sealing groove (21) are provided inside both the hoop A (36) and the hoop B (37). The pressing module includes a rubber block (39) with an inner side surface set as an arc surface (391), and a plurality of through-holes B are provided on the rubber block (39).

7. The mine negative pressure ventilation and dust removal device with a blower according to claim 5 or 6, characterized in that, The connecting portion further includes a connecting rod B (32) on the rectangular plate (30) between the two connecting rods A (31); nuts B which abut against the rectangular plate (30) are threadedly connected to both the connecting rod A (31) and the connecting rod B (32). A limiting plate is provided at the end of the connecting rod B (32), and a connecting plate (33) is rotatably mounted at the end. Two stud bolts (331) are penetrated through the connecting plate (33), and a nut C (332) which abuts against the connecting plate (33) is threadedly connected to the end of the stud bolt (331). The bottom ends of the two stud bolts (331) are connected to a connecting sleeve (333), a connecting block inserted into the connecting sleeve (333) is provided on the outer side wall of the hoop A (36), and a locking bolt A (334) is provided on the connecting sleeve (333).

8. The mine negative pressure ventilation and dust removal device with a blower according to claim 7, characterized in that, A cross bar (4) is connected between the two suspension mechanisms (3), and a plurality of hanging mechanisms (5) are equidistantly mounted on the cross bar (4) along its length direction. A connecting seat (34) is mounted on the two stud bolts (331) between the connecting sleeve (333) and the connecting plate (33). A jack (341) for the cross bar (4) to be inserted into is provided on the connecting seat (34), and locking bolts B (342) are threadedly connected to both the upper and lower surfaces thereof.

9. The mine negative pressure ventilation and dust removal device with a blower according to claim 8, characterized in that, The cross bar (4) includes a rod body (40), insertion rods (41) inserted into the jacks (341) are provided at both ends of the rod body (40), the diameter of the insertion rod (41) is equivalent to the size of the jack (341), and the diameter of the cross bar (4) is larger than that of the insertion rod (41). A connecting column (42) with a semi-circular cross section is provided at the end of the insertion rod (41), a groove A (43) is provided on the arc surface of the connecting column (42), and a through-hole A (44) is provided on the bottom side surface of the groove A (43). During installation, when the connecting column (42) is inserted into the jack (341), turn the locking bolt B (342) until the end of the locking bolt B (342) abuts against the bottom side of the groove A (43). The diameter of the locking bolt B (342) is between that of the groove (43) and the through hole (44).

10. The mine negative pressure ventilation and dust removal device with a hair dryer according to claim 9, characterized in that, The hanging mechanism (5) includes a collar (50) sleeved on the rod body (40), and a convex column (51) is connected to one side of the collar (50). A groove B (501) is provided on the inner wall of the collar (50), and a through hole B (511) communicating with the groove B (501) and having a concentric structure is provided on the convex column (51). It further includes a column head (52) placed on the groove B (501). A vertical rod (53) with a diameter equivalent to that of the through hole B (511) is connected to the end of the column head (52). A connecting rod (54) is connected to the end of the vertical rod (53), a hook rod (55) is connected to the end of the connecting rod (54), and a hook body (56) is connected to the end of the hook rod (55). A notch (512) for the connecting rod (54) to pass through is formed on one side of the convex column (51).

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