Self-dedusting induced draft fan device

Abstract

The utility model relates to the technical field of air inducing and dust removing equipment, and particularly discloses a self-dust-removing induced draft fan device which comprises an induced draft fan. The spray pipe comprises a contraction section, a throat part and a diffusion section which are sequentially arranged towards one side far away from the induced draft fan; the suction pipe comprises a leading-in pipe connected to the bottom of the spray pipe; the plugging mechanism is mounted between the induced draft fan and the spray pipe and comprises a plugging seat, a plugging core is slidably arranged in the plugging seat, one side of the plugging core is connected with a pull rod, and the pull rod slidably extends to the outside of the plugging seat to be connected with a moving strip; according to the structure arrangement of the induced draft fan, the spray pipe and the suction pipe, the high-speed and low-pressure characteristics of the throat part of the Venturi pipe are utilized, dust-containing gas is directly adsorbed through the introduction pipe, dust is prevented from entering the induced draft fan, a fan impeller and a flow channel are prevented from being blocked from the source, arrangement of extra dust removal equipment is reduced, and the position of the blocking core body is adjusted through the moving piece; dust-containing gas can be isolated under the condition that the induced draft fan is not disassembled, and maintenance or replacement is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of self dust removal induced draft fan device, and specifically is a kind of self dust removal induced draft fan device. BACKGROUND

[0002] Kiln dust removal induced draft fan has the effect of adjusting flue suction, controlling flue gas emission, adjusting kiln pressure, but in long-term use, dust in kiln can be accumulated, blocked in induced draft fan, and the current processing scheme is to switch standby induced draft fan, and then clean main induced draft fan.

[0003] The cooperation of the existing induced draft fan and its connecting pipeline structure requires regular maintenance, and the induced draft fan for disassembly and cleaning has a long maintenance cycle. Dust is easily accumulated at the internal corners, and the long-term flow of dust removal air can accelerate the wear of the induced draft fan. To solve the above problems, a self dust removal induced draft fan device is provided. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of self dust removal induced draft fan device to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A self dust removal induced draft fan device includes an induced draft fan.

[0007] A nozzle includes a converging section, a throat and a diverging section arranged in sequence away from the induced draft fan side.

[0008] A suction pipe includes an intake pipe connected to the bottom of the nozzle.

[0009] A plugging mechanism is installed between the induced draft fan and the nozzle, which includes a plugging seat, a plugging core body is slidably arranged in the plugging seat, a pull rod is connected to one side of the plugging core body, the pull rod is slidably extended to the outside of the plugging seat to connect a moving strip, and a moving piece is installed on the plugging seat for adjusting the movement of the moving strip.

[0010] In an alternative, the induced draft fan includes an induced draft fan body, an air inlet pipe connected to the air inlet end of the induced draft fan body, and an air outlet pipe connected to the air outlet end of the induced draft fan body, and a bracket is installed on one side of the induced draft fan body.

[0011] In an alternative, the plugging seat is connected to a first installation pipe that is docked and installed with the air outlet pipe on one side, and is connected to a second installation pipe that is docked and installed with the converging section on the other side, and the first installation pipe and the second installation pipe are in communication with the inner cavity of the plugging seat.

[0012] In an alternative, the moving piece includes a pneumatic telescopic rod installed on the top of the plugging seat, and the movable rod connected to the power output end of the pneumatic telescopic rod is connected to one side of the top end of the moving strip.

[0013] In an alternative: the mobile strip bottom end side is connected with a guide rod, the bottom of the blocking seat is fixedly connected with a guide block, and a sliding hole for sliding of the guide rod is arranged on the guide block.

[0014] In an alternative: the blocking core and the inner wall of the blocking seat are in sliding fit.

[0015] In an alternative: the inner diameter of the outflow port of the contraction section is smaller than that of the inflow port of the contraction section, the inner diameter of the outflow port of the diffusion section is larger than that of the inflow port of the diffusion section, and the outflow end of the contraction section and the inflow end of the diffusion section are communicated through a throat.

[0016] In an alternative: the bottom of the introduction pipe is connected with a connecting pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] In the utility model, the structure of the induced draft fan, the nozzle and the suction pipe is set, the high-speed low-pressure characteristics of the throat of the Venturi tube are utilized, the dust-containing gas is directly adsorbed through the introduction pipe, dust is avoided from entering the inside of the induced draft fan, the fan impeller and the flow passage are prevented from being blocked from the source, the configuration of the additional dust removal equipment is reduced, the position of the blocking core is adjusted through the moving part, the dust-containing gas can be isolated without disassembling the induced draft fan, and the maintenance or replacement is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model.

[0020] Figure 2 It is a structural schematic view of the nozzle and the suction pipe in the utility model.

[0021] Figure 3 It is a structural schematic view of the induced draft fan and the blocking mechanism in the utility model.

[0022] Figure 4 It is a structural schematic view of the blocking mechanism in the utility model.

[0023] Figure 5 It is a structural schematic view of the inside of the blocking seat in the utility model.

[0024] In the drawing: 1, induced draft fan; 2, nozzle; 3, suction pipe; 4, blocking mechanism;

[0025] 11, induced draft fan main body; 12, air inlet pipe; 13, air outlet pipe; 14, support;

[0026] 21, contraction section; 22, throat; 23, diffusion section;

[0027] 31, introduction pipe; 32, connecting pipe;

[0028] 41, blocking seat; 42, first mounting pipe; 43, second mounting pipe; 44, moving strip; 45, pneumatic telescopic rod; 46, guide rod; 47, guide block; 48, blocking core; 49, pull rod. DETAILED DESCRIPTION

[0029] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] Please refer to Figures 1-5 In the present embodiment, a self-dedusting induced draft fan device comprises an induced draft fan 1;

[0032] A nozzle 2 comprises a contraction section 21, a throat section 22 and a diffusion section 23 arranged in sequence away from the induced draft fan 1;

[0033] A suction pipe 3 comprises an inlet pipe 31 connected to the bottom of the nozzle 2; and

[0034] A blocking mechanism 4 is installed between the induced draft fan 1 and the nozzle 2, which comprises a blocking seat 41, a blocking core 48 is slidably arranged in the blocking seat 41, the blocking core 48 is connected to a pull rod 49 on one side, the pull rod 49 can be symmetrically arranged in two groups, the pull rod 49 is slidably extended to the outside of the blocking seat 41 to connect the moving strip 44, the pull rod 49 is in sliding seal with the blocking seat 41, and a moving piece for adjusting the movement of the moving strip 44 is installed on the blocking seat 41;

[0035] With the above scheme, the introduction pipe 31 can be connected with the kiln flue gas pipeline, after the induced draft fan 1 is started, the external air enters the nozzle 2 through the induced draft fan 1 and the plugging seat 41, the cross-sectional area of the converging section 21 gradually decreases to accelerate the fluid, the flow rate is maximum and the pressure is lowest at the throat 22, the diffuser section 23 slows down the fluid and restores the pressure, the fluid reaches the maximum flow rate at the throat, forming a local low pressure area, which can adsorb the dust-containing gas in the introduction pipe 31, avoiding dust from blocking the induced draft fan 1, and reducing the accumulation of dust at the corner; when the induced draft fan 1 is not assisted to discharge the dust-containing gas or is disassembled, the moving piece can be adjusted to move the moving strip 44, the horizontal movement of the pull rod 49 is controlled, the movement of the plugging core 48 is adjusted, the passage between the induced draft fan 1 and the nozzle 2 can be plugged, and the self-flow of the dust-containing gas into the induced draft fan 1 is avoided.

[0036] Please refer to Figure 1 and Figure 3 , the induced draft fan 1 includes an induced draft fan body 11, an air inlet pipe 12 connected to the air inlet end of the induced draft fan body 11, and an air outlet pipe 13 connected to the air outlet end of the induced draft fan body 11, and a support 14 is installed on one side of the induced draft fan body 11; the induced draft fan body 11 can introduce external gas.

[0037] Please refer to Figure 3 and Figure 4 , the plugging seat 41 is connected with the first installation pipe 42 which is connected with the air outlet pipe 13 on one side, and the second installation pipe 43 which is connected with the converging section 21 on the other side, and the first installation pipe 42 and the second installation pipe 43 are in communication with the inner cavity of the plugging seat 41; specifically, the first installation pipe 42 and the second installation pipe 43 are provided with corresponding flanges for connection.

[0038] Please refer to Figure 2 , the moving piece includes a pneumatic telescopic rod 45 installed on the top of the plugging seat 41, and the movable rod at the power output end of the pneumatic telescopic rod 45 is connected with one side of the top end of the moving strip 44; when the pneumatic telescopic rod 45 works, the movement of the moving strip 44 can be adjusted.

[0039] Please refer to Figure 2 , the bottom end of the moving strip 44 is connected with a guide rod 46, the bottom of the plugging seat 41 is fixedly connected with a guide block 47, and the guide block 47 is provided with a sliding hole for sliding of the guide rod 46; specifically, during the movement of the moving strip 44, the guide rod 46 slides in the sliding hole of the guide block 47, improving the stability of the movement of the moving strip 44.

[0040] Further, the plugging core 48 is in sliding fit with the inner wall of the plugging seat 41. The plugging core 48 slides to switch positions, so as to realize the communication or plugging of the first installation pipe 42 and the second installation pipe 43.

[0041] Please refer to Figure 2The outflow end of the contraction section 21 and the inflow end of the diffusion section 23 are communicated through the throat 22; in particular, the strong negative pressure effect generated by the Venturi tube structure improves the dust removal efficiency.

[0042] Please refer to Figure 2 The introduction pipe 31 is connected with the adapter pipe 32 at the bottom, and the adapter pipe 32 can be connected with a kiln flue gas pipeline, or the introduction pipe 31 is directly connected with the kiln flue gas pipeline, and the adapter pipe 32 is selectively used according to actual application.

[0043] The working principle of the utility model is: the introduction pipe 31 can be connected with a kiln flue gas pipeline, after the induced draft fan 1 is started, external air enters the nozzle 2 through the induced draft fan 1 and the plugging seat 41, and the strong negative pressure effect generated by the nozzle 2 can adsorb dust-containing gas in the introduction pipe 31, so that dust is prevented from blocking the induced draft fan 1, and dust accumulation at the corner is reduced; when the induced draft fan 1 is not used to assist in discharging dust-containing gas or is disassembled, the pneumatic telescopic rod 45 can adjust the movement of the movable strip 44, control the horizontal movement of the pull rod 49, adjust the movement of the plugging core 48, block the channel between the induced draft fan 1 and the nozzle 2, and prevent dust-containing gas from flowing into the induced draft fan 1.

[0044] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms, and any skilled person in the art can change or modify the above disclosed technical content into equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model still belong to the protection scope of the utility model technical scheme.

Claims

1. A self-cleaning induced draft fan unit, characterized by: The utility model provides an air supply device, which comprises an air supply fan (1); A nozzle (2) comprising a converging section (21), a throat section (22) and a diverging section (23) arranged in sequence away from the air supply fan (1); A suction pipe (3) comprising an inlet pipe (31) connected to the bottom of the nozzle (2); and A sealing mechanism (4) installed between the air supply fan (1) and the nozzle (2), comprising a sealing seat (41), a sealing core (48) slidingly arranged in the sealing seat (41), a pull rod (49) connected to one side of the sealing core (48), the pull rod (49) slidingly extending to the outside of the sealing seat (41) to connect a moving strip (44), and a moving piece installed on the sealing seat (41) for adjusting the movement of the moving strip (44). The air supply fan (1) comprises an air supply fan body (11), an air inlet pipe (12) connected to the air inlet end of the air supply fan body (11), and an air outlet pipe (13) connected to the air outlet end of the air supply fan body (11), and a support (14) is installed on one side of the air supply fan body (11).

2. A self-cleaning induced draft fan unit according to claim 1, wherein: One side of the sealing seat (41) is connected with a first mounting pipe (42) which is butt-jointed with the air outlet pipe (13), and the other side of the sealing seat (41) is connected with a second mounting pipe (43) which is butt-jointed with the converging section (21), and the first mounting pipe (42) and the second mounting pipe (43) are in communication with the inner cavity of the sealing seat (41).

3. A self-cleaning induced draft fan unit according to claim 2, wherein: The moving piece comprises a pneumatic telescopic rod (45) installed on the top of the sealing seat (41), and the movable rod connected to the power output end of the pneumatic telescopic rod (45) is connected to one side of the top end of the moving strip (44).

4. A self-cleaning induced draft fan unit as claimed in claim 1, wherein: One side of the bottom end of the moving strip (44) is connected with a guide rod (46), and a guide block (47) is fixedly connected to the bottom of the sealing seat (41), and the guide block (47) is provided with a sliding hole for sliding of the guide rod (46).

5. A self-cleaning induced draft fan unit according to claim 4, wherein: The sealing core (48) is slidingly matched with the inner wall of the sealing seat (41).

6. A self-cleaning induced draft fan unit according to claim 5, wherein: The inner diameter of the air outlet port of the converging section (21) is smaller than the inner diameter of the air inlet port of the converging section (21), the inner diameter of the air outlet port of the diverging section (23) is larger than the inner diameter of the air inlet port of the diverging section (23), and the air outlet end of the converging section (21) and the air inlet end of the diverging section (23) are communicated through the throat section (22).

7. A self-cleaning induced draft fan apparatus as claimed in claim 1, wherein: The bottom of the inlet pipe (31) is connected with a connecting pipe (32).

8. A self-cleaning induced draft fan apparatus as claimed in claim 1, wherein: ​

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