Drainage blowing structure of bag-type dust collector

Abstract

The utility model discloses a drainage blowing structure of a bag-type dust collector, which comprises a blowing pipe and blowing branch pipes, the blowing pipe is radially communicated with a plurality of blowing branch pipes, and the pipe walls of the blowing branch pipes are provided with drainage holes; a flow guide cover is arranged on the axis of a blowing opening in the lower portion of the blowing branch pipe and provided with a conical face for diffusing and guiding airflow, the upper end of the flow guide cover is located in the blowing opening, the lower end of the flow guide cover extends out of the blowing opening, and an airflow blowing channel is reserved between the lower end of the flow guide cover and the blowing opening. The flow guide covers are additionally arranged at the blowing ports of the blowing branch pipes and play a role in guiding and diffusing airflow, the blowing direction of the airflow is changed, the problem that an air source is consumed due to the fact that a filter bag is not blown by an airflow center area in the traditional direct blowing process is solved, the airflow can be blown to the filter bag in a concentrated mode, the blowing effect is enhanced, and the blowing efficiency is improved. And the flow guide cover can be lengthened or shortened according to actual requirements, the airflow purging area is changed, and the use effect is remarkable.

Description

Technical Field

[0001] The utility model relates to the technical field of bag filters, in particular to a diversion and injection structure of a bag filter. Background Technique

[0002] The injection pipe is a device for injecting and purging the filter bags of a bag filter. During dust cleaning, the pulsed air flow is injected into the filter bag through the injection holes of the injection pipe, inducing the surrounding gas, causing the filter bag to vibrate, and with the action of the reverse air flow, the dust on the filter bag falls off, thus completing the dust cleaning. With the continuous development of technology, people's requirements for the manufacturing process of the injection pipe are also getting higher and higher.

[0003] The patent with the authorization announcement number CN214158884U discloses an injection secondary diversion device, including an injection pipe, a conduit, a diversion bowl, a framework and a filter bag; a number of injection holes are opened on the injection pipe, the conduit is fully welded to the injection pipe, and the conduit is concentric with the injection holes; a diversion bowl is concentrically welded on the conduit, and side holes are arranged at relative positions on the side wall of the diversion bowl. When the diversion bowl is welded, the bottom end of the conduit should cross the side holes of the diversion bowl. The size and position of the side holes need to ensure that they do not coincide with the low-pressure air flow area a of the injection and leave a certain margin of space. The air flow sprays out from the conduit, and the air flow injection area is frustum-shaped. It is found that the central area of the air flow has no effect on purging the filter bag and also consumes the air source. In fact, the edge of the flow injection area plays a role in purging the filter bag, and further improvement is needed. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects, provide a diversion and injection structure of a bag filter, solve the problem that the central area of the air flow does not purge the filter bag and consumes the air source during traditional direct injection, enable the air flow to blow towards the filter bag more concentratedly, enhance the purging effect, and can also extend or shorten the diversion cover according to actual needs to change the air flow purging area, with remarkable use effect, and can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a diversion and injection structure of a bag filter, including an injection pipe and injection branch pipes, the injection pipe is radially connected with a plurality of injection branch pipes, and the pipe wall of the injection branch pipes is provided with diversion holes; a diversion cover is arranged on the axis of the lower injection port of the injection branch pipe, the diversion cover has a conical surface for diffusing and guiding the air flow, the upper end of the diversion cover is located in the injection port, and the lower end of the diversion cover extends out of the injection port and leaves an air flow injection channel between the lower end of the diversion cover and the injection port.

[0006] Preferably, a fixed sleeve is fixed on the inner axis of the injection branch pipe through a connecting rod, one end of the connecting rod is connected with the fixed sleeve, and the other end of the connecting rod is fixed in the diversion hole; the upper end of the diversion cover is provided with a lead screw threadedly connected with the fixed sleeve.

[0007] Preferably, a conical block is provided at the upper end of the fixed sleeve.

[0008] Preferably, the blowing pipe is located inside the bag filter housing. A sleeve corresponding to and communicating with the blowing pipe is provided on the side wall of the bag filter housing. An end plate is provided on the outer wall of the sleeve, and the end plate is welded to the side wall of the bag filter housing.

[0009] Preferably, a plurality of the blowing branch pipes are linearly arrayed, and the blowing branch pipes are welded to the blowing pipe.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: By adding a flow guide cover to the blowing port of the blowing branch pipe, the flow guide cover plays a role in guiding and diffusing the airflow, changes the blowing direction of the airflow, solves the problem that the air source is not purged and wasted at the central area of the airflow during traditional direct blowing to the filter bag, enables the airflow to blow towards the filter bag more concentratedly, enhances the purging effect, and can also extend or shorten the flow guide cover according to actual needs to change the airflow purging area, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a schematic enlarged view of a partial structure of the present utility model Figure 1 ;

[0013] Figure 3 is a schematic enlarged view of a partial structure of the present utility model Figure 2 。

[0014] In the figure: 1 blowing pipe, 2 blowing branch pipes, 2.1 drainage holes, 3 sleeve, 3.1 end plate, 4 flow guide cover, 4.1 lead screw, 5 fixed sleeve, 5.1 conical block, 5.2 connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, it is only corresponding to the drawings of the present application for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0016] Please refer to Figures 1-3 , the present utility model provides the following technical solutions:

[0017] Embodiment 1: A diversion and injection structure of a bag filter, comprising an injection pipe 1 and injection branch pipes 2. A plurality of injection branch pipes 2 are radially connected to the injection pipe 1. Drainage holes 2.1 are provided on the pipe wall of the injection branch pipes 2; a diversion cover 4 is provided on the axis of the lower injection port of the injection branch pipe 2. The diversion cover 4 has a conical surface for diffusing and guiding the air flow. The upper end of the diversion cover 4 is located inside the injection port, and the lower end of the diversion cover 4 extends out of the injection port and there is an air flow injection channel left between the lower end of the diversion cover 4 and the injection port;

[0018] It can be understood that by adding a diversion cover 4 to the injection port of the injection branch pipe 2, the diversion cover 4 plays a role in guiding and diffusing the air flow, that is, the air flow can only flow through the air flow injection channel between the diversion cover 4 and the injection port, changing the blowing direction of the air flow, solving the problem that the air flow in the central area does not blow the filter bag and wasting the air source during traditional direct blowing, enabling the air flow to blow towards the filter bag more concentratedly, enhancing the blowing effect. The drainage hole 2.1 is for air intake, and a negative pressure is formed during air flow injection to supplement air from the drainage hole 2.1.

[0019] Embodiment 2: Different from Embodiment 1, a fixing sleeve 5 is fixed on the inner axis of the injection branch pipe 2 through a connecting rod 5.2. One end of the connecting rod 5.2 is connected to the fixing sleeve 5, and the other end of the connecting rod 5.2 is fixed in the drainage hole 2.1. Here, the connecting rod 5.2 does not block the drainage hole 2.1. Specifically, at least two drainage holes 2.1 are provided, and at least one connecting rod 5.2 is provided; a lead screw 4.1 threadedly connected to the fixing sleeve 5 is provided at the upper end of the diversion cover 4, and a conical block 5.1 is provided at the upper end of the fixing sleeve 5 to reduce air flow resistance; by threadedly connecting the lead screw 4.1 with the fixing sleeve 5, the telescopic amount of the lead screw 4.1 can be adjusted, and then the gap of the air flow injection channel between the diversion cover 4 and the injection port can be changed, changing the air flow blowing area according to actual needs, and being flexible and convenient to use.

[0020] Embodiment 3: Different from Embodiment 1, the injection pipe 1 is located inside the bag filter box body. A sleeve 3 corresponding to and communicating with the injection pipe 1 is provided on the side wall of the bag filter box body. An end plate 3.1 is provided on the outer wall of the sleeve 3, and the end plate 3.1 is welded to the side wall of the bag filter box body. The external jet header is connected by using the sleeve 3 to avoid the problem of insecure welding and easy leakage when the injection pipe 1 directly penetrates the side wall of the box body; a plurality of injection branch pipes 2 are linearly arranged in an array, and the injection branch pipes 2 are welded to the injection pipe 1.

[0021] The parts not detailed in the present utility model are prior art. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, aiming to include all changes falling within the meaning and scope of the equivalent elements in the content of the present utility model.

Claims

1. A drainage and blowing structure for a bag filter, comprising a blowing pipe (1) and a blowing branch pipe (2), characterized in that: The blowing pipe (1) is radially connected to a plurality of blowing branch pipes (2), and the wall of the blowing branch pipe (2) is provided with a drainage hole (2.1); a guide cover (4) is provided on the axis of the lower blowing port of the blowing branch pipe (2), and the guide cover (4) has a conical surface for guiding the airflow diffusion, the upper end of the guide cover (4) is located in the blowing port, and the lower end of the guide cover (4) extends out of the blowing port and leaves an airflow blowing channel between the blowing port and the blowing port.

2. The drainage and blowing structure of a bag filter according to claim 1 is characterized in that: The internal axis of the injection branch pipe (2) is fixed with a fixing sleeve (5) via a connecting rod (5.2); one end of the connecting rod (5.2) is connected to the fixing sleeve (5), and the other end of the connecting rod (5.2) is fixed in the drainage hole (2.1); the upper end of the deflector cover (4) is provided with a screw rod (4.1) threadedly connected to the fixing sleeve (5).

3. The drainage and blowing structure of a bag filter according to claim 2 is characterized in that: A conical block (5.1) is provided at the upper end of the fixing sleeve (5).

4. The drainage and blowing structure of a bag filter according to claim 1 is characterized in that: The blowing pipe (1) is located in the bag filter housing, and a sleeve (3) corresponding to and in communication with the blowing pipe (1) is provided on the side wall of the bag filter housing. An end plate (3.1) is provided on the outer wall of the sleeve (3), and the end plate (3.1) is welded to the side wall of the bag filter housing.

5. The drainage and blowing structure of a bag filter according to claim 1 is characterized in that: A plurality of the blowing branch pipes (2) are arranged in a linear array, and the blowing branch pipes (2) are welded to the blowing pipe (1).

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