A dust removal filter cartridge and its head cover structure

Abstract

The utility model discloses a dust filter cartridge and its head cover structure, including a head cover and a bottom cover, a cylindrical filter material cartridge and an inner net are arranged between the head cover and the bottom cover, the filter material cartridge and the inner net are arranged in the outer circle and the inner circle respectively, one end of the head cover connected to the filter material cartridge and the inner net is a docking end, the end facing away from the docking end is a back-blowing air inlet end, the docking end is provided with an extension end, a back-blowing air duct is provided in the head cover, the back-blowing air duct includes a contraction section, a throat section and a diffusion section arranged in sequence from the back-blowing air inlet end to the docking end, and the outlet of the diffusion section is located in the inner net. The utility model can reduce the pulse gas volume loss and improve the uniformity of gas distribution when performing pulse jet system cleaning and dust removal, thereby improving the cleaning efficiency and system stability.

Description

Technical Field

[0001] The utility model belongs to the field of dust removal equipment, and particularly relates to a dust removal filter cartridge and a head cover structure thereof. Background Art

[0002] Compared with traditional filter bags, the use of filter cartridges significantly improves the processing capacity and filtration efficiency of bag dust collectors. This design not only reduces the space occupied by the equipment, but also optimizes the overall filtration performance. In actual operation, as the use time increases, the dust accumulated on the filter cartridge will cause its air permeability to decrease, thereby increasing the flow resistance of the system. In order to maintain efficient filtration performance, the filter cartridge must be cleaned regularly using a pulse jet system. The pulse jet system releases compressed gas in a short period of time, generating a strong impact force to shake off the dust attached to the surface of the filter cartridge.

[0003] However, due to the certain distance between the existing pulse branch pipe and the filter cartridge, part of the gas volume is lost during the gas transmission process, thereby reducing the effective utilization rate of the pulse gas. In addition, the uneven gas distribution further weakens the cleaning effect, affecting the stable operation of the entire system and the long-term maintenance cost. Utility Model Content

[0004] In order to overcome the shortcomings and problems of the prior art, the utility model provides a dust removal filter cartridge and a head cover structure thereof, which can reduce the pulse gas volume loss and improve the uniformity of gas distribution when performing pulse jet system cleaning and dust removal, thereby improving the cleaning efficiency and system stability.

[0005] The utility model is realized by the following technical solutions:

[0006] A dust removal filter cartridge comprises a head cover and a bottom cover, wherein a cylindrical filter material cartridge and an inner net are arranged between the head cover and the bottom cover, the filter material cartridge and the inner net are arranged in an outer circle and an inner circle respectively, one end of the head cover connected to the filter material cartridge and the inner net is a docking end, the end facing away from the docking end is a back-blowing air inlet end, the docking end is provided with an extended end portion, a back-blowing air duct is arranged in the head cover, the back-blowing air duct comprises a contraction section, a throat section and a diffusion section arranged in sequence from the back-blowing air inlet end to the docking end, and the outlet of the diffusion section is located in the inner net.

[0007] The contraction section, throat section and diffusion section are all arc-shaped and gradually transitioned.

[0008] The inlet diameter of the contraction section is larger than the outlet diameter of the diffusion section, and the length of the contraction section is larger than that of the diffusion section.

[0009] The head cover is provided with a flow-increasing hole, which extends from the outer wall of the head cover to the inner wall of the contraction section, and is arranged obliquely.

[0010] There are a plurality of flow-increasing holes, which are evenly distributed around the circumference of the head cover.

[0011] The cylinder wall of the filter material cylinder is formed by repeatedly folding the layered filter material, and the outer wall of the filter material cylinder is provided with a strap for binding the cylinder body.

[0012] The utility model is also achieved through the following technical solutions:

[0013] A head cover structure of a dust removal filter cartridge includes a head cover, one end of the head cover is a butt joint end, and the other end is a back-blowing air inlet end, the butt joint end is provided with an extended end portion, and a back-blowing air duct is provided inside the head cover, and the back-blowing air duct includes a contraction section, a throat section and a diffusion section arranged in sequence from the back-blowing air inlet end to the butt joint end.

[0014] The contraction section, throat section and diffusion section are all arc-shaped and gradually transitioned.

[0015] The inlet diameter of the contraction section is larger than the outlet diameter of the diffusion section, and the length of the contraction section is larger than that of the diffusion section.

[0016] The head cover is provided with a flow-increasing hole, which extends from the outer wall of the head cover to the inner wall of the contraction section, and the flow-increasing hole is arranged obliquely.

[0017] The utility model is provided with an extended end portion, which makes the head cover of the filter cartridge closer to the pulse branch pipe when the pulse jet system is used for cleaning and dust removal, thereby helping to reduce the airflow energy loss caused by the increase in distance during the transmission process, thereby maintaining a higher pulse gas volume. In addition, a contraction section, a throat section and a diffusion section are provided, which are similar to the Venturi tube structure, so that the speed of the pulse airflow passing through is accelerated and a more uniform gas distribution is formed inside the filter cartridge, which not only increases the gas flow rate, but also optimizes the gas diffusion effect, thereby improving the cleaning effect of the entire filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the dust removal filter cartridge in the utility model;

[0019] Figure 2 It is a structural schematic diagram of the head cover in the utility model;

[0020] Figure 3 It is a schematic diagram of the end surface structure of the head cover in the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the pulse jet system for cleaning and dust removal of the utility model.

[0022] In the figure: 1-head cover, 11-butt end, 12-backblowing air inlet end, 13-extension end, 14-backblowing airway, 141-contraction section, 142-throat section, 143-diffusion section, 15-flow-increasing hole, 2-bottom cover, 3-filter material cylinder, 31-binding belt, 4-inner net, 5-pulse branch pipe. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of those skilled in the art, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Example

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, a dust removal filter cartridge includes a head cover 1 and a bottom cover 2, and a cylindrical filter material cartridge 3 and an inner net 4 are provided between the head cover 1 and the bottom cover 2. The filter material cartridge 3 and the inner net 4 are arranged in the outer circle and the inner circle respectively. When the filter cartridge is used for dust removal, the air passes through the filter material cartridge 3 and the inner net 4 for dust removal, and the dust is isolated by the filter material cartridge 3, thereby playing a dust removal role. After the filter cartridge is used for a long time, dust will accumulate on the filter material cartridge 3, thereby affecting the air permeability. At this time, backblowing can be performed through a pulse jet system. The pulse jet system releases compressed gas in a short time, and the gas is blown out through the inner net 4 and the filter material cartridge 3, thereby shaking off the dust accumulated on the filter material cartridge 3. The barrel wall of the filter material cartridge 3 is formed by repeatedly folding the layered filter material. This structure can increase the filtering area and improve the filtering effect. The outer wall of the filter material cartridge 3 is provided with a strap 31 for binding the barrel body, which can be used to fix the shape of the filter material cartridge 3.

[0025] The end of the head cover 1 connected to the filter material cylinder 3 and the inner net 4 is a docking end 11, and the end facing away from the docking end 11 is a back-blowing air inlet end 12. The docking end 11 is provided with an extension end 13. Due to the setting of the extension end 13, when the pulse jet system is used for cleaning and dust removal, the head cover 1 is closer to the pulse branch pipe, which helps to reduce the airflow energy loss caused by the increase in distance during the transmission process, thereby maintaining a higher pulse gas volume, so the back-blowing gas volume can be increased, and the cleaning and dust removal effect is improved.

[0026] A back-blowing air duct 14 is provided in the head cover 1. The back-blowing air duct 14 includes a contraction section 141, a throat section 142 and a diffusion section 143 which are arranged in sequence from the back-blowing air inlet end 12 to the docking end 11. Similar to the structure of a Venturi tube, a Venturi effect can be generated in the back-blowing air duct 14, thereby accelerating the velocity of the pulsed air flow passing through and forming a more uniform gas distribution inside the filter cartridge, which not only increases the gas flow rate, but also optimizes the gas diffusion effect, thereby improving the cleaning effect of the entire filter cartridge.

[0027] The contraction section 141, the throat section 142 and the diffusion section 143 are all arc-shaped transitions, and this structure makes the airflow flow smoother without obstruction. The inlet diameter of the contraction section 141 is larger than the outlet diameter of the diffusion section 143, and the length of the contraction section 141 is larger than the diffusion section 143. This structure allows the gas to be replenished into the filter cartridge as quickly as possible during backflush, thereby increasing the air intake into the filter cartridge.

[0028] The head cover 1 is provided with a flow-increasing hole 15, which extends from the outer wall of the head cover 1 to the inner wall of the contraction section 141, and the flow-increasing hole 15 is inclined. There are a plurality of flow-increasing holes 15, which are evenly distributed around the circumference of the head cover 1. A Venturi effect will be formed in the back-blowing air duct 14, and the Venturi effect will produce a low-pressure area, which will cause the ambient gas to enter the filter cartridge together with the pulse airflow under the action of the pressure difference. The flow-increasing hole 15 can increase the gas flow rate, so this design not only increases the total working gas volume, but also helps to maintain the pressure balance inside and outside the filter cartridge by introducing additional ambient gas, and further promotes uniform airflow distribution.

[0029] The outlet of the diffusion section 143 is located in the inner net 4 , so that during back-blowing, the gas enters the inner net 4 and is blown out through the inner net 4 to the filter cartridge 3 .

[0030] The pulse jet system cleaning and dust removal process of this embodiment: Figure 4 As shown, the pulse branch pipe 5 of the pulse jet system is aligned with the back-blowing air duct 14, and the pulse branch pipe 5 emits pulse gas, which enters the inner net 4 through the back-blowing air duct 14. The pulse gas forms a Venturi effect when passing through the back-blowing air duct 14, which speeds up the passing pulse airflow and forms a more uniform gas distribution inside the filter cartridge, which not only increases the gas flow rate but also optimizes the gas diffusion effect. The Venturi effect will produce a low-pressure area, which will cause the ambient gas to enter the filter cartridge together with the pulse airflow under the action of the pressure difference. The flow-increasing hole 15 can further increase the gas flow rate, and by introducing additional ambient gas, it helps to maintain the pressure balance inside and outside the filter cartridge, further promoting uniform airflow distribution. The pulse gas in the inner net 4 passes through the inner net 4 to the filter material cartridge 3, thereby shaking off the dust on the filter material cartridge 3, thereby improving the cleaning effect of the entire filter cartridge. Example

[0031] like Figure 2 and Figure 3 As shown, a head cover structure of a dust filter cartridge includes a head cover 1, one end of the head cover 1 is a butt end 11, and the other end is a back-blowing air inlet end 12, the butt end 11 is provided with an extension end 13, and a back-blowing air duct 14 is provided inside the head cover 1, and the back-blowing air duct 14 includes a contraction section 141, a throat section 142 and a diffusion section 143 arranged in sequence from the back-blowing air inlet end 12 to the butt end 11. Similar to the Venturi tube structure, a Venturi effect can be generated in the back-blowing air duct 14, so that the speed of the pulsed air flow passing through is accelerated, and a more uniform gas distribution is formed inside the filter cartridge, which not only increases the gas flow rate, but also optimizes the gas diffusion effect, thereby improving the dust cleaning effect of the entire filter cartridge.

[0032] The contraction section 141, the throat section 142 and the diffusion section 143 are all arc-shaped transitions. This structure makes the airflow flow smoother without obstruction. The inlet diameter of the contraction section 141 is larger than the outlet diameter of the diffusion section 143, and the length of the contraction section 141 is larger than the diffusion section 143. This structure allows the gas to be replenished into the filter cartridge as quickly as possible during backflush, thereby increasing the air intake into the filter cartridge.

[0033] The head cover 1 is provided with a flow-increasing hole 15, which extends from the outer wall of the head cover 1 to the inner wall of the contraction section 141, and the flow-increasing hole 15 is inclined. There are a plurality of flow-increasing holes 15, which are evenly distributed around the circumference of the head cover 1. A Venturi effect will be formed in the back-blowing air duct 14, and the Venturi effect will produce a low-pressure area, which will cause the ambient gas to enter the filter cartridge together with the pulse airflow under the action of the pressure difference. The flow-increasing hole 15 can increase the gas flow rate, so this design not only increases the total working gas volume, but also helps to maintain the pressure balance inside and outside the filter cartridge by introducing additional ambient gas, and further promotes uniform airflow distribution.

[0034] The above embodiments are preferred implementations of the present invention and are not intended to limit the present invention. Without departing from the inventive concept of the present invention, any obvious replacements are within the protection scope of the present invention.

Claims

1. A dust removal filter cartridge, comprising a head cover (1) and a bottom cover (2), characterized in that: A cylindrical filter material cylinder (3) and an inner net (4) are provided between the head cover and the bottom cover. The filter material cylinder and the inner net are arranged in the outer circle and the inner circle respectively. One end of the head cover connected to the filter material cylinder and the inner net is a butt end (11), and the end facing away from the butt end is a back-blowing air inlet end (12). The butt end is provided with an extension end (13). A back-blowing air duct (14) is provided in the head cover. The back-blowing air duct includes a contraction section (141), a throat section (142) and a diffusion section (143) arranged in sequence from the back-blowing air inlet end to the butt end. The outlet of the diffusion section is located in the inner net.

2. The dust removal filter cartridge according to claim 1, characterized in that: The contraction section (141), the throat section (142) and the diffusion section (143) are all arc-shaped and gradually transitioned.

3. The dust removal filter cartridge according to claim 2, characterized in that: The inlet diameter of the contraction section (141) is larger than the outlet diameter of the diffusion section (143), and the length of the contraction section is larger than that of the diffusion section.

4. The dust removal filter cartridge according to claim 1, characterized in that: The head cover (1) is provided with a flow increasing hole (15), the flow increasing hole extending from the outer wall of the head cover to the inner wall of the contraction section (141), and the flow increasing hole is arranged obliquely.

5. The dust removal filter cartridge according to claim 4, characterized in that: A plurality of flow-increasing holes (15) are provided, evenly distributed around the circumference of the head cover (1).

6. The dust removal filter cartridge according to any one of claims 1 to 5, characterized in that: The cylinder wall of the filter material cylinder (3) is formed by repeatedly folding layered filter material, and the outer wall of the filter material cylinder is provided with a binding belt (31) for binding the cylinder body.

7. A head cover structure of a dust filter cartridge, comprising a head cover (1), characterized in that: One end of the head cover is a butt end (11), and the other end is a back-blowing air inlet end (12). The butt end is provided with an extension end (13). A back-blowing air duct (14) is provided inside the head cover. The back-blowing air duct includes a contraction section (141), a throat section (142), and a diffusion section (143) which are sequentially arranged from the back-blowing air inlet end to the butt end.

8. The head cover structure of the dust filter cartridge according to claim 7 is characterized in that: The contraction section (141), the throat section (142) and the diffusion section (143) are all arc-shaped and gradually transitioned.

9. The head cover structure of the dust filter cartridge according to claim 8, characterized in that: The inlet diameter of the contraction section (141) is larger than the outlet diameter of the diffusion section (143), and the length of the contraction section is larger than that of the diffusion section.

10. The head cover structure of the dust filter cartridge according to claim 7, characterized in that: The head cover (1) is provided with a flow increasing hole (15), the flow increasing hole extending from the outer wall of the head cover to the inner wall of the contraction section (141), and the flow increasing hole is arranged at an inclined position.

Images