Blowing structure for bag-type dust collector

Abstract

The utility model discloses a blowing structure for a bag-type dust collector, which comprises an air bag, a blowing valve arranged at the top end of the air bag, a blowing hose communicated with the blowing valve penetrating through the inside of the air bag, a blowing pipe communicated with the other end of the blowing hose, and a blowing head arranged at the bottom end of the blowing pipe, an air hole opening and closing assembly is further arranged on the outer side of the blowing hose; the air hole opening and closing assembly comprises a sleeve arranged on the outer side of the blowing hose, the outer side of the sleeve is sleeved with a closed outer pipe, the closed outer pipe structure can be controlled to rotate through the closed outer pipe structure in the air hole opening and closing assembly, and air holes in the outer side of the blowing hose are closed. The closed outer pipe can be controlled to be rotationally opened on the outer side of the sleeve, the air holes are opened, external air is communicated, and external fresh air is continuously sucked in through the small holes by utilizing negative pressure in the dust remover during operation, so that acid condensation is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of blowing tubes for bag dust collectors, in particular to a blowing structure for bag dust collectors. Background Art

[0002] At present, during the use of boiler bag dust collectors, it is found that the injection valves and injection elbows are corroded, perforated and leaking, and the number and degree of corrosion are constantly increasing. If the defects cannot be eliminated in time, it will affect the injection effect of the bag dust collector filter bags, and will inevitably cause serious environmental incidents to the safe operation of the dust collector and smoke emissions.

[0003] A spray valve device for a bag dust collector with application number 202221098420.4 includes a right-angle spray valve, a spherical flexible joint, an air bag and a manual butterfly valve. The inlet of the right-angle spray valve is connected to a first pipe, and the outlet of the right-angle spray valve is connected to a second pipe. The manual butterfly valve is installed on the first pipe through a flange. The first pipe is connected to the air bag at one end away from the right-angle spray valve. The air bag is connected to the external compressed air main through an independent air pipe. The second pipe is installed with the spherical flexible joint through a flange, and the second pipe passes through the top plate of the clean air box and enters the clean air box. The end of the second pipe located in the clean air box is welded with an elbow.

[0004] Upon inspection, it was determined that the injection air source for the bag filter was provided by a separate injection air compressor equipped with a modular dryer at the compressor outlet. The injection air source was dry and free of moisture, and no water was detected in the automatic steam traps of the gas storage tanks. Eliminating the quality of the injection air source and combining it with on-site visual inspections, the corrosion of the injection valve and the inner wall of the injection elbow was attributed to acid corrosion. Due to the low exhaust temperature of the boiler, especially during low load conditions at night in winter, the inlet flue gas temperature of the bag filter is around 100°C. When the injection valve actuates momentarily, the wall temperature of the injection valve and the injection elbow drops. After the injection is completed, the hot SO3-containing flue gas returning from the collector condenses on the pipe wall, forming acid mist, which in turn causes corrosion of the pipe wall and the injection valve itself. Utility Model Content

[0005] In view of the above problems, the utility model provides a spraying structure for a bag dust collector which is simple in structure, convenient and reliable.

[0006] The utility model provides the following technical solution: a blowing structure for a bag dust collector, comprising an air bag, a blowing valve being provided at the top of the air bag, a blowing hose connected to the blowing valve running through the interior of the air bag, a blowing pipe being provided at the other end of the blowing hose, a blowing head being provided at the bottom end of the blowing pipe, and an air hole opening and closing assembly being further provided on the outside of the blowing hose;

[0007] The air hole opening and closing assembly includes a sleeve arranged on the outside of the blowing hose, a closed outer tube is sleeved on the outside of the sleeve, an air hole is opened on the right side of the blowing hose, a vertical groove is opened on the right side of the sleeve close to the air hole, and a docking groove is opened on the right side of the closed outer tube close to the air hole and the vertical groove.

[0008] A support plate is provided at the outer bottom end of the sleeve, a servo motor is provided at the top end of the support plate, a driving gear is provided at the main shaft end of the servo motor, and a driven gear connected to the closed outer tube is meshed on the outer side of the driving gear.

[0009] There are three air holes arranged in a vertical row, and the cross section of the vertical groove is the same as that of the docking groove.

[0010] The front and rear sides of the closed outer tube are both provided with transverse grooves, and a positioning shaft connected with the sleeve is slidably provided inside the transverse grooves.

[0011] The closed outer tube is rotatably arranged on the outside of the sleeve, and the rotation range of the closed outer tube is 0° to 15°.

[0012] External threads are provided on the outer sides of both ends of the spray hose, and connectors are spirally provided on the outer sides of the external threads. The connector at the top is threadedly connected to the pipe of the air bag, and the connector at the bottom is threadedly connected to the spray pipe.

[0013] During operation, the utility model can control the closed outer tube structure in the air hole opening and closing assembly to rotate, and close the air holes on the outside of the spray hose. During the operation of spraying, the closed outer tube can be controlled to rotate and open on the outside of the sleeve, so as to open the air holes and connect to the outside air. During operation, the negative pressure in the dust collector is used to continuously inhale fresh air from the outside through the small holes to prevent acid condensation.

[0014] The servo motor drive structure in the air hole opening and closing component cooperates with the meshing of the gears to control the automatic rotation of the sleeve, and the automatic positioning drive function can be set to control the regular opening and closing of the closed outer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation structure of the spray hose of the utility model;

[0017] Figure 3 This is a schematic diagram of the air hole opening structure of the spray hose of the utility model;

[0018] Figure 4 This is a schematic diagram of the installation structure of the air hole opening and closing component of the utility model;

[0019] Figure 5 This is a schematic diagram of the installation structure of the closed outer tube of the utility model.

[0020] In the figure: 1. Air bag; 2. Blowing valve; 3. Blowing hose; 4. Blowing pipe; 5. Blowing head;

[0021] 6. Air hole opening and closing assembly; 61. Sleeve; 62. Vertical slot; 63. Support plate; 64. Servo motor; 65. Driving gear; 66. Driven gear; 67. Closed outer tube; 68. Docking slot; 69. Horizontal slot; 610. Positioning shaft;

[0022] 7. Air hole; 8. Connector. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1-5 As shown, the utility model provides a blowing structure for a bag dust collector, including an air bag 1, a blowing valve 2 is provided at the top of the air bag 1, a blowing hose 3 connected to the blowing valve 2 is passed through the interior of the air bag 1, the other end of the blowing hose 3 is connected to a blowing pipe 4, and a blowing head 5 is provided at the bottom end of the blowing pipe 4. The structure of multiple blowing heads 5 can perform rapid blowing processing, and the outside of the blowing hose 3 also includes an air hole opening and closing component 6;

[0025] The air hole opening and closing assembly 6 includes a sleeve 61 arranged on the outside of the spray hose 3, and a closed outer tube 67 is sleeved on the outside of the sleeve 61. An air hole 7 is provided on the right side of the spray hose 3, and the air hole 7 can be connected to the outside air. A vertical groove 62 is provided on the right side of the sleeve 61 close to the air hole 7, and a docking groove 68 is provided on the right side of the closed outer tube 67 close to the air hole 7 and the vertical groove 62. The closed outer tube 67 rotates on the outside of the sleeve 61, and the docking groove 68 and the vertical groove 62 can be staggered for closing.

[0026] like Figure 1-5As shown, a support plate 63 is provided at the outer bottom end of the sleeve 61, a servo motor 64 is provided at the top of the support plate 63, a driving gear 65 is provided at the main shaft end of the servo motor 64, and a driven gear 66 connected to the closed outer tube 67 is engaged on the outer side of the driving gear 65. The servo motor 64 is driven and can rotate automatically through gear transmission. The front and rear sides of the closed outer tube 67 are provided with transverse grooves 69, and a positioning shaft 610 connected to the sleeve 61 is slidingly provided inside the transverse groove 69. The closed outer tube 67 is positioned on the outside of the positioning shaft 610 through the transverse groove 69 and moves to limit the rotation range.

[0027] like Figure 1-5 As shown, three air holes 7 are arranged in a vertical row, the vertical groove 62 has the same cross-section as the docking groove 68, the closed outer tube 67 is rotatably arranged on the outside of the sleeve 61, and the rotation range of the closed outer tube 67 is 0° to 15°, reducing the rotation range of the closed outer tube 67, thereby avoiding the situation where the gap gradually becomes larger.

[0028] like Figure 1-5 As shown, external threads are provided on the outer sides of both ends of the spray hose 3, and a connector 8 is spirally provided on the outer side of the external thread. The upper connector 8 is threadedly connected to the pipe of the air bag 1, and the lower connector 8 is threadedly connected to the spray pipe 4. The connector 8 is used for connection to facilitate installation and maintenance operations.

[0029] Among them, the spray valve 2 and the servo motor 64 are existing technologies and will not be described in detail; at the same time, the present invention also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail.

[0030] The wiring diagram of the motor in the present invention is common knowledge in the art, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the motor are not explained in detail.

[0031] The blowing structure of the bag dust collector is connected, and the air bag 1, the blowing valve 2, the blowing hose 3, and the blowing pipe 4 are connected by a connector 8 to form a whole. During actual operation, the servo motor 64 in the air hole opening and closing assembly 6 on the outside of the blowing hose 3 can drive the driving gear 65 to rotate, and the driven gear 66 located on the outside of the sleeve 61 can be engaged to drive the closed outer tube 67 to rotate synchronously. The docking groove 68 on the right side of the closed outer tube 67 is docked with the vertical groove 62 of the sleeve 61 to form a through hole. The air hole 7 on the outside of the blowing hose 3 is connected to the outside world, and the negative pressure in the dust collector is used during operation to continuously inhale fresh air from the outside through the small hole. The concentration of corrosive flue gas in the blowing pipe 4 is greatly reduced to prevent acid condensation. The regular driving time can also be set. The servo motor 64 drives the driving gear 65 to rotate at a regular time, controls the docking groove 68 and the vertical groove 62 to open at a regular time, and the air hole 7 is connected. Timed ventilation is achieved, which is more convenient to use.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blowing structure for a bag filter, comprising an air bag (1), characterized in that: The top of the air bag (1) is provided with a blowing valve (2), the interior of the air bag (1) is penetrated by a blowing hose (3) connected to the blowing valve (2), the other end of the blowing hose (3) is connected to a blowing pipe (4), the bottom end of the blowing pipe (4) is provided with a blowing head (5), and the outside of the blowing hose (3) also includes an air hole opening and closing component (6); The air hole opening and closing assembly (6) comprises a sleeve (61) arranged on the outside of the blowing hose (3), a closed outer tube (67) is sleeved on the outside of the sleeve (61), an air hole (7) is provided on the right side of the blowing hose (3), a vertical groove (62) is provided on the right side of the sleeve (61) close to the air hole (7), and a docking groove (68) is provided on the right side of the closed outer tube (67) close to the air hole (7) and the vertical groove (62).

2. The blowing structure for bag dust collector according to claim 1, characterized in that: A support plate (63) is provided at the outer bottom end of the sleeve (61), a servo motor (64) is provided at the top end of the support plate (63), a driving gear (65) is provided at the main shaft end of the servo motor (64), and a driven gear (66) connected to the closed outer tube (67) is meshed on the outer side of the driving gear (65).

3. The blowing structure for bag dust collector according to claim 1, characterized in that: The air holes (7) are arranged in three vertical rows, and the vertical groove (62) and the docking groove (68) have the same cross-section.

4. The blowing structure for a bag dust collector according to claim 1, characterized in that: The closed outer tube (67) is provided with transverse grooves (69) on both the front and rear sides, and a positioning shaft (610) connected to the sleeve (61) is slidably provided inside the transverse groove (69).

5. The blowing structure for bag dust collector according to claim 1, characterized in that: The closed outer tube (67) is rotatably arranged outside the sleeve (61), and the rotation range of the closed outer tube (67) is 0° to 15°.

6. The blowing structure for a bag dust collector according to claim 1, characterized in that: External threads are provided on the outer sides of both ends of the spray hose (3), and a connector (8) is spirally provided on the outer sides of the external threads. The connector (8) located at the top is threadedly connected to the pipeline of the air bag (1), and the connector (8) located at the bottom is threadedly connected to the spray pipe (4).

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