Dust removal device for dry powder screening

Abstract

The utility model discloses a dust removal device for dry powder screening, and relates to the technical field of dust removal devices, the dust removal device comprises a box body and a fixed plate located on the inner wall of the box body, a filter bag is connected to the upper surface of the fixed plate, symmetrical guide rails are connected to the two sides of the inner wall of the box body, and a movable block located at the top of the fixed plate is slidably connected to the guide rails. A telescopic cavity is formed in the moving block, an air outlet pipe extending into the telescopic cavity is connected to the box body, a groove is formed in the bottom of the end, away from the telescopic cavity, of the moving block, a gas spray head is installed in the groove, and an airflow channel is connected between the spray head and the telescopic cavity. According to the dust removal device for dry powder screening, the cleaning efficiency of air flow to the filter bag is improved, meanwhile, the movable block can move in a reciprocating mode, the intermittent cleaning effect is achieved, the impact force generated when spraying is conducted every time is improved, and the capacity of cleaning attached dust is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal devices, and more specifically to a dust removal device for dry powder screening. Background Art

[0002] Before use, dry powder materials will be screened by a screening device to determine the particle size of the materials and improve the production quality. However, during the screening process, fine dust will be separated from the materials. These dusts will not only cause environmental pollution, but may also pose an explosion hazard (for certain flammable or explosive dusts), and at the same time, will also cause a reduction in the quality of the materials.

[0003] A dust removal device will be set up to filter the screened materials to achieve the separation of solids and gases. For example, the Chinese patent with the application number 202022782017.0 discloses a bag filter with good bag fixing effect. The structure includes a dust removal box. There is a first cross plate in the dust removal box. The lower side wall of the first cross plate is fixedly connected with a guide plate. There are two filter bags on the first cross plate. The lower end of one side wall of the dust removal box is provided with an air inlet pipe. The upper end of the other side wall of the dust removal box is provided with an air outlet pipe. The lower end of the dust removal box is provided with a dust removal pipe. The outer wall of the dust removal box near the air inlet pipe is fixedly connected with a second cross plate. For this bag filter with good bag fixing effect, the filter bags are cleaned by the blowing pipeline at the top. However, the air outlet pipeline has been at the top of the filter bags, which will affect the air flow at the top of the filter bags. Moreover, the air flow will run out from both sides and does not all move towards the filter bags. At the same time, when cleaning the filter bags, the sprayed air flow will accumulate at the bottom of the box body after passing through the filter bags. The air flow can only move out from the air inlet pipe and the dust removal pipe, and cannot be discharged from the air outlet pipe at the top.

[0004] Therefore, it is very necessary to propose a dust removal device for dry powder screening to solve the above problems. Summary of the Utility Model

[0005] In view of the above problems, the utility model provides a dust removal device for dry powder screening, which has the function of improving the cleaning ability of the filter bags and at the same time can guide the sprayed air flow to the designated pipeline.

[0006] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0007] A dust removal device for dry powder screening, comprising a box body and a fixing plate located on the inner wall of the box body. A filter bag is connected above the fixing plate. Symmetrical guide rails are connected to both sides of the inner wall of the box body. A moving block located at the top of the fixing plate is slidably connected to the guide rails. A telescopic cavity is formed inside the moving block. An air outlet pipe extending into the telescopic cavity is connected to the box body. A groove is formed at the bottom of one end of the moving block away from the telescopic cavity. A gas spray head is installed in the groove. An air flow channel is connected between the spray head and the telescopic cavity;

[0008] One end of the air outlet pipe is connected with a sealing ring slidably connected to the inner wall of the telescopic cavity. A storage part is arranged at one end of the telescopic cavity away from the spray head.

[0009] Preferably, a spring is connected to one end of the moving block away from the air outlet pipe, and the other end of the spring is connected to the inner wall of the box body.

[0010] Preferably, a connecting pipe is connected to the bottom of the fixing plate on the side away from the filter bag, and a filter net is connected to the bottom of the connecting pipe.

[0011] Preferably, a feeding pipe extending to the inside is connected to the side wall of the box body. One end of the feeding pipe located inside the box body is connected with a cover plate through a hinge.

[0012] Preferably, a powder pipeline is connected to the bottom of the box body, an air flow pipeline is connected to the top of the box body, installation platforms are connected to both sides of the box body, and an air supply pipe is connected to one end of the air outlet pipe away from the telescopic cavity.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. A moving block that moves back and forth is arranged at the top of the filter bag of the present device. After the moving block moves to the top of the filter bag, it will cover the entire top of the filter bag, so that the ejected air flow can only move towards the filter bag, improving the cleaning efficiency of the air flow on the filter bag. At the same time, the moving block can move reciprocally, achieving the function of intermittent cleaning, enhancing the impact force during each ejection, and improving the cleaning ability for attached dust.

[0015] 2. A connecting pipe is arranged on the fixing plate of the present device, and the internal air flow is discharged through the connecting pipe, avoiding the situation that the air flow passing through the filter bag cannot be discharged from the specified pipeline during the cleaning of the filter bag. At the same time, the feeding pipe and the cover plate on the side wall of the box body can play a role of one-way flow. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the structure of the present utility model;

[0017] Figure 2 is a cross-sectional view of the structure of the present utility model;

[0018] Figure 3 Schematic diagram of the fixing plate and the moving block structure in the present utility model;

[0019] Figure 4 Schematic diagram of the box body fixed to the suspended screening device in the present utility model.

[0020] Reference numerals:

[0021] 101, box body; 102, fixing plate; 103, filter bag; 104, moving block; 105, telescopic cavity; 106, air outlet pipe; 107, spray head; 108, air flow channel; 109, sealing ring; 110, storage part; 111, spring; 112, connecting pipe; 113, feeding pipe; 114, cover plate; 115, powder pipeline; 116, air flow pipeline; 117, air supply pipe. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-4, A dust removal device for dry powder screening, including a box body 101 and a fixing plate 102 located on the inner wall of the box body 101. The box body 101 is fixed to other equipment through support platforms on both sides, so as to perform dust removal actions on the screened dust materials. A filter bag 103 is connected above the fixing plate 102. Symmetrical guide rails are connected to both sides of the inner wall of the box body 101. The slide rails are used to stably move the moving block 104 back and forth. A moving block 104 located at the top of the fixing plate 102 is slidably connected to the guide rails. Specifically, when it is necessary to clean the filter bag 103, air is supplied from the air supply pipe 117 to the air outlet pipe 106. The air flow enters the telescopic cavity 105 through the air outlet pipe 106, making the air pressure in the telescopic cavity 105 increase. Subsequently, the air flow drives the moving block 104 to move towards the other end. Then, the moving block 104 will entirely cover the top of the filter bag 103, and the spray head 107 at the bottom is arranged towards the filter bag 103. When the sealing ring 109 enters the storage part 110, the air flow channel 108 will connect the telescopic cavity 105 and the spray head 107, so that the air flow in the telescopic cavity 105 is sprayed towards the filter bag 103 through the spray head 107, thus playing a role in cleaning the filter bag 103. A telescopic cavity 105 is opened inside the moving block 104. An air outlet pipe 106 extending into the telescopic cavity 105 is connected to the box body 101. The air outlet pipe 106 is connected to the air supply pipe 117, and the air supply pipe 117 is connected to an external air supply device. A groove is opened at the bottom of the end of the moving block 104 away from the telescopic cavity 105, and a gas spray head 107 is installed in the groove. The telescopic cavity 105 is connected to the spray head 107 through an air flow channel 108;

[0024] One end of the air outlet pipe 106 is connected with a sealing ring 109 that is slidably connected to the inner wall of the telescopic cavity 105. The outer ring surface of the sealing ring 109 is in interference fit with the inner wall of the telescopic cavity 105. The sealing ring 109 is made of rubber. A storage part 110 is arranged at the end of the telescopic cavity 105 away from the spray head 107. The storage part 110 is used to store the sealing ring 109. The sealing ring 109 will enter the storage part 110 only after passing through the inlet end of the air flow channel 108.

[0025] The following provides a structure for resetting the moving block 104 and simultaneously causing the nozzle 107 to eject air flow in a pulsed manner for cleaning: Specifically, a spring 111 is connected to one end of the moving block 104 away from the air outlet pipe 106. The spring 111 pushes the moving block 104 to be located on the side of the fixing plate 102 away from the filter bag 103. The other end of the spring 111 is connected to the inner wall of the box body 101. When the air pressure in the telescopic cavity 105 is too high and pushes the moving block 104 to cover the filter bag 103, the air flow will eject from the nozzle 107, thereby cleaning the filter bag 103. When the air pressure in the telescopic cavity 105 decreases to be equal to the outside, the spring 111 pushes the moving block 104 to reset. Repeating this way, the function of pulsed cleaning is achieved.

[0026] Specifically, referring to Figure 3 , a connecting pipe 112 is connected to the bottom of the side of the fixing plate 102 away from the filter bag 103. When the moving block 104 moves to the top of the filter bag 103, the top of the connecting pipe 112 will be exposed. When the nozzle 107 jets air towards the filter bag 103, the air flow at the bottom of the fixing plate 102 will move to the top through the connecting pipe 112 and finally be discharged from the air flow pipe 116. A filter screen is connected to the bottom of the connecting pipe 112, and the filter screen serves to intercept solid particles.

[0027] Specifically, a feeding pipe 113 extending into the interior is connected to the side wall of the box body 101. The feeding pipe 113 is a feeding port and is connected to the feeding end. The cover plate 114 at the top covers the feeding pipe 113 due to gravity and has the function of one-way movement, preventing the air flow from moving out through the feeding pipe 113 when there is no material passing through. One end of the feeding pipe 113 located inside the box body 101 is connected to the cover plate 114 through a hinge.

[0028] Specifically, a powder pipeline 115 is connected to the bottom of the box body 101. The powder pipeline 115 is a discharge channel for powder particles. Since the bottom is connected to the storage device, the air flow will not pass through here. An air flow pipe 116 is connected to the top of the box body 101. The air flow filtered by the filter bag 103 is discharged from the air flow pipe 116. Installation platforms are connected to both sides of the box body 101. The box body 101 can be installed on other devices through the installation platforms on both sides. Referring to Figure 4 , Figure 4 is a schematic diagram of the box body 101 fixed to the suspended filtering device. A hose is connected between the feeding pipe 113 and the screening machine. One end of the air outlet pipe 106 away from the telescopic cavity 105 is connected to an air supply pipe 117, and the air supply pipe 117 is connected to the outside air flow and is used to transport the air flow into the telescopic cavity 105.

[0029] In this embodiment, the feeding pipe 113 on the box body 101 is connected to the feeding end. Materials enter the box body 101 through the feeding pipe 113. After the air flow is filtered by the filter bag 103, it is discharged from the air flow pipe 116 at the top, and the powder is discharged from the powder pipe 115 at the bottom. When the filter bag 103 needs to be cleaned, the supply of materials is stopped, and air is introduced into the telescopic cavity 105 through the air supply pipe 117, so that the moving block 104 can move towards the filter bag 103, and the ejected air flow can clean the filter bag 103.

[0030] The above-mentioned implementation manners are only the preferred implementation manners of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the protection scope required by the present invention.

Claims

1. A dust removal device for dry powder screening, comprising a box body (101) and a fixing plate (102) located on the inner wall of the box body (101), a filter bag (103) is connected above the fixing plate (102), and it is characterized in that: On both sides of the inner wall of the box body (101), symmetric guide rails are connected. A moving block (104) located on the top of the fixed plate (102) is slidably connected to the guide rails. An expansion cavity (105) is formed inside the moving block (104). An air outlet pipe (106) extending into the expansion cavity (105) is connected to the box body (101). A groove is formed at the bottom of the end of the moving block (104) away from the expansion cavity (105). A gas spray head (107) is installed in the groove. An air flow channel (108) is connected between the spray head (107) and the expansion cavity (105). One end of the air outlet pipe (106) is connected with a sealing ring (109) slidably connected to the inner wall of the expansion cavity (105). A storage part (110) is arranged at the end of the expansion cavity (105) away from the spray head (107).

2. The dust removal device for dry powder screening according to claim 1, wherein: A spring (111) is connected to the end of the moving block (104) away from the air outlet pipe (106). The other end of the spring (111) is connected to the inner wall of the box body (101).

3. The dust removal device for dry powder screening according to claim 1, characterized in that: A connecting pipe (112) is connected to the bottom of the side of the fixed plate (102) away from the filter bag (103). A filter screen is connected to the bottom of the connecting pipe (112).

4. The dust removal device for dry powder screening according to claim 1, wherein: A feed pipe (113) extending to the inside is connected to the side wall of the box body (101). One end of the feed pipe (113) located inside the box body (101) is connected with a cover plate (114) through a hinge.

5. The dust removal device for dry powder screening according to claim 1, wherein: A powder pipeline (115) is connected to the bottom of the box body (101). The top of the box body (101) is connected with an air flow pipeline (116). Installation platforms are connected to both sides of the box body (101). One end of the air outlet pipe (106) away from the expansion cavity (105) is connected with an air supply pipe (117).

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