High-temperature negative pressure filter

Abstract

The invention belongs to the technical field of filters, and particularly provides a high-temperature negative-pressure filter which comprises a filter cartridge, a support is fixedly connected to the bottom of the filter cartridge, a pressure quick-opening manhole is formed in one side of the filter cartridge, a first air inlet is formed in the side, close to the pressure quick-opening manhole, of the top of the filter cartridge, and a first flange is arranged at the first air inlet. An inclined limiting ring is arranged on the side, away from the pressure quick-opening manhole, of the first flange in the filter cylinder, a filter element is arranged in the filter cylinder, a connecting plate is arranged at the opening position of the side, close to the manhole cover, of the filter element, the connecting plate and the limiting ring are matched and fixedly connected through butterfly screws, and a first air outlet is formed in the side, away from the pressure quick-opening manhole, of the filter cylinder. A second flange is arranged at the first air outlet, a plunger hole is formed in the top of the side, close to the first air outlet, of the filter cylinder, a valve rod connector is detachably installed in the plunger hole, and a filter element support is arranged at the bottom of the filter element on the side, close to the second flange, in the filter cylinder. The pressure relief installation position is provided, pressure relief can be conducted in time, and the structure of the filter is protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a high-temperature negative pressure filter. BACKGROUND

[0002] In the papermaking industry, the air filter is the core component to ensure the stable operation of production equipment (such as vacuum fan, turbine fan), which is used to remove dust, fiber, adhesive and high-temperature gas in the air inlet, so as to prevent the equipment from being blocked or overheated.

[0003] The air of paper mill (especially the air inlet of vacuum fan) is rich in impurities such as fiber dust and adhesive, which is easy to accumulate on the surface of filter core. As the filtration proceeds, the pressure difference of filter cartridge continues to rise. If the pressure difference exceeds the design limit value, the filter cartridge structure will be deformed, the welding seam will be cracked, and even the vacuum fan will be overloaded and stopped if not relieved in time. SUMMARY

[0004] In view of the above defects, the present application provides a high-temperature negative pressure filter, which provides a pressure relief installation position, so as to relieve pressure in time and protect the filter structure.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: a high-temperature negative pressure filter, comprising a filter cartridge, the bottom of the filter cartridge is fixedly connected with a support, one side of the filter cartridge is provided with a pressure quick-opening manhole, the top of the filter cartridge is provided with a first air inlet on the side close to the pressure quick-opening manhole, the first air inlet is provided with a first flange, the first flange in the filter cartridge is provided with an inclined limiting ring on the side away from the pressure quick-opening manhole, the filter cartridge is provided with a filter core inside, the filter core is provided with a connecting plate on the opening of the side close to the manhole cover, the connecting plate is fixedly connected with the limiting ring through a butterfly screw, the filter cartridge is provided with a first air outlet on the side away from the pressure quick-opening manhole, the first air outlet is provided with a second flange, the filter cartridge is provided with a plunger hole on the top of the side close to the first air outlet, a valve rod joint is detachably installed in the plunger hole, and the filter core is provided with a filter core support on the bottom of the side close to the second flange in the filter cartridge.

[0006] As a further improvement of the present application, the pressure quick-opening manhole comprises a manhole cover, and one end of the manhole cover is hinged to the filter cartridge.

[0007] As a further improvement of the present application, the outer edge of the manhole cover is circumferentially spaced apart and provided with a plurality of connecting blocks, the side of the connecting block close to the filter cartridge is provided with a first clamping block, the side of the connecting block away from the filter cartridge is provided with a first clamping groove, the side of the filter cartridge close to the manhole cover is fixedly connected with a hinge block matched with the connecting block, the hinge block is provided with a second clamping groove matched with the first clamping block, the hinge block is hingedly provided with a fastening bolt, and the fastening bolt is fixedly provided with a second clamping block matched with the first clamping groove.

[0008] As a further improvement of the application, a sight glass is arranged in the middle of the manhole cover, a rotatable handle is arranged in the middle of the sight glass, and a scraper is fixed to the handle inside the sight glass.

[0009] As a further improvement of the application, the number of the filter element supports is 3, and adjacent filter element supports are arranged at an angle of 30° with respect to the center of the filter cartridge.

[0010] As a further improvement of the application, the support includes a vertical plate and a horizontal plate, the top of the vertical plate is welded and fixed to the filter cartridge, the bottom of the horizontal plate is fixedly connected with a support column through double locking nuts, and the bottom of the support column is fixedly connected with a base.

[0011] As a further improvement of the application, the transverse section of the vertical plate is T-shaped.

[0012] As a further improvement of the application, the filter element is a single-layer metal wire mesh structure, the diameter of the metal wire of the woven metal wire mesh is 8 mm, and the mesh size is a rhombic hole with a size of 1 mm x 1 mm.

[0013] The application has the following beneficial effects: 1. The top of the filter cartridge is provided with a plunger hole with an inner wire and a valve rod joint, supporting the rapid installation of a pressure relief valve. When the pressure difference exceeds the limit, the pressure can be relieved in time to avoid deformation of the filter cartridge, cracking of the weld, or overloading of the fan. The bottom of the filter cartridge is eccentrically welded to the support through the T-shaped vertical plate, which significantly improves the pressure difference deformation resistance and ensures the structural stability under high pressure conditions.

[0014] 2. A rotatable handle is arranged in the central through hole of the sight glass, and the handle is connected with a scraper attached to the inside of the sight glass. Without stopping the machine and opening the cover, the external handle can be rotated to drive the scraper to remove dirt (such as papermaking fibers and adhesives) inside the sight glass. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural diagram of a high-temperature negative pressure filter of the application; Figure 2 is Figure 1 is an enlarged schematic view of A in FIG. 4; Figure 3 is a first structural diagram of a support; Figure 4 is a second structural diagram of a support; Figure 5 is a connection diagram of a support column; Figure 6 is a structural diagram of a filter element installation.

[0016] In the figure: 1 - filter cartridge, 2 - support, 200 - cross plate, 201 - vertical plate, 3 - support column, 300 - base, 4 - locking nut, 5 - reinforcing nut, 6 - manhole cover, 7 - sight glass, 8 - handle, 9 - first flange, 10 - handle, 11 - butterfly screw, 12 - limit ring, 13 - filter element, 130 - connecting plate, 14 - plunger hole, 15 - valve rod joint, 16 - second flange, 17 - filter element support, 18 - connecting block, 180 - first clamping block, 181 - first clamping groove, 19 - hinged block, 190 - second clamping groove, 191 - fastening bolt, 192 - second clamping block. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application. The directional terms mentioned in the following examples, such as up, down, left, right, front or back, etc., are only the direction of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present application, and in all examples, the same reference numerals represent the same elements.

[0018] Please refer to Figures 1 to 6 The present application provides a high-temperature negative pressure filter, comprising a filter cartridge 1, and supports 2 are fixed on both sides of the lower part of the filter cartridge 1 by welding.

[0019] The support 2 comprises a vertical plate 201 and a cross plate 200. The cross section of the vertical plate 201 is T-shaped. The top of the vertical plate 201 is arc-shaped and is welded and fixed to the bottom of the filter cartridge 1.

[0020] The bottom of the vertical plate 201 is welded and fixed to the top of the cross plate 200. The long plate of the vertical plate 201 is eccentrically arranged on one side of the cross plate 200, and the short plate of the vertical plate 201 is located at the center of the cross plate 200.

[0021] Two fixing holes are formed on both sides of the short plate of the cross plate 200. The fixing holes can be circular holes or straight slot-shaped holes. A support column 3 is fitted in the fixing hole. The top of the support column 3 is provided with a thread and is fitted with two locking nuts 4. The two locking nuts 4 are fitted at the upper and lower ends of the short plate respectively, and are tightened in the axial direction of the support column 3 to clamp the support 2. The locking nut 4 located on the upper side is further welded and fixed to the cross plate 200.

[0022] The bottom of the support column 3 is provided with a circular truncated cone-shaped base 300, and the support column 3 above the base 300 is further fitted with a reinforcing nut 5.

[0023] The filter cartridge 1 is provided with an opening at one end, and the opening is provided with a pressure quick-opening manhole, including a manhole cover 6, one end of the manhole cover 6 is hinged to the filter cartridge 1. The center of the manhole cover 6 is provided with an observation hole, and the observation hole is fixedly installed with a sight glass 7 through a bolt. The center of the sight glass 7 is provided with a through hole, and a handle 8 is rotatably connected in the through hole. The inner side of the handle 8 is fixedly connected with a scraper, and the scraper is in close contact with the inner side of the sight glass 7.

[0024] As a further explanation of the present embodiment, by rotating the handle 8, the scraper can rotate tightly against the inner side of the sight glass 7, thereby cleaning the sight glass 7 and ensuring that the inside of the filter cartridge 1 can be observed at any time.

[0025] A plurality of connecting blocks 18 are arranged at intervals along the circumferential direction of the outer edge of the manhole cover 6. The first clamping block 180 is arranged at the center of the side close to the filter cartridge 1 of the connecting block 18, and the first clamping groove 181 is arranged at the outer edge of the side away from the filter cartridge 1 of the connecting block 18. A plurality of hinged blocks 19 are arranged on the side close to the manhole cover 6 of the filter cartridge 1, and the hinged blocks 19 are arranged one by one corresponding to the connecting blocks 18. The second clamping groove 190 is arranged on the side close to the connecting block 18 of the hinged block 19, and the second clamping groove 190 can be matched with the first clamping block 180. The hinged block 19 is also hingedly provided with a fastening bolt 191, and the fastening bolt 191 is fixedly connected with a second clamping block 192. One end of the second clamping block 192 is matched with the first clamping groove 181.

[0026] As a further explanation of the present embodiment, rotate the manhole cover 6 to close it. At this time, the first clamping block 180 of the connecting block 18 on the manhole cover 6 is matched into the second clamping groove 190 of the hinged block 19, and then the hinged fastening bolt 191 is rotated to make the second clamping block 192 matched into the first clamping groove 181, thereby realizing the fixation between the manhole cover 6 and the filter cartridge 1.

[0027] A first air inlet is arranged at the top of the filter cartridge 1, and a first flange 9 is welded at the first air inlet. A limiting ring 12 is arranged obliquely in the filter cartridge 1. The top of the limiting ring 12 is located on the side away from the manhole cover 6 of the first air inlet. The limiting ring 12 is an obliquely arranged circular ring, and the limiting ring 12 and the inner wall of the filter cartridge 1 form a 45° angle. A plurality of threaded holes perpendicular to the plate surface of the limiting ring 12 are arranged on the limiting ring 12.

[0028] A plunger hole 14 is arranged at the top of the side away from the manhole cover 6 in the filter cartridge 1, and an internal thread is arranged inside the plunger hole 14. A valve rod joint 15 is installed in the plunger hole 14, and the valve rod joint 15 can install a pressure relief valve.

[0029] As a further explanation of the present embodiment, different valve rod joints 15 can be selected according to the size of the required pressure relief valve.

[0030] The bottom of the filter cartridge 1 away from the manhole cover 6 is provided with a filter core support 17, which is plate-shaped and has three pieces. Adjacent filter core supports 17 are arranged at an angle of 30° about the center of the filter cartridge 1, and all filter core supports 17 are arranged in the vertical direction.

[0031] The filter cartridge 1 is provided with a filter core 13 made of S30408 stainless steel, which has good resistance to general corrosion (such as air, water, steam, weak acid and weak base). The filter core 13 is a single-layer metal wire mesh structure, and the diameter of the metal wire of the woven metal wire mesh is 8 mm, and the mesh size is a rhombic hole with a size of 1 mm x 1 mm.

[0032] One end of the filter core 13 is provided with an inclined opening, and an annular connecting plate 130 is arranged outwardly at the opening. The connecting plate 130 is the same shape as the limiting plate on the filter cartridge 1, and one side of the connecting plate 130 is fixedly connected with the handle 10. A through hole matched with the threaded hole on the limiting ring 12 is formed on the connecting plate 130, and the connecting plate 130 is fixedly connected with the limiting ring 12 through the butterfly screw 11. The lower side of the filter core 13 away from the opening is abutted with the top of the filter core support 17.

[0033] As a further explanation of the embodiment, the filter core 13 can be supported by the filter core support 17 to ensure the stability and coaxiality of the installation of the filter core 13 in the filter cartridge 1.

[0034] A first gas outlet is formed at one end of the filter cartridge 1 away from the manhole cover 6, and a second flange 16 is welded at the first gas outlet. The second flange 16 is concentrically arranged with the filter cartridge 1.

[0035] The working principle and use process of the embodiment are as follows: The high-temperature negative pressure filter is fixed, the first flange 9 at the first gas inlet is connected to the gas outlet of the gas to be filtered, and the second flange 16 at the first gas outlet is connected to the gas inlet end of the negative pressure device. The gas enters the inside of the filter cartridge 1 from the first flange 9, then passes through the filter core 13, and the impurities contained therein are blocked by the filter core 13 of the metal wire mesh structure. The gas passes through the filter core 13, and then the second flange 16 at the first gas outlet is discharged, thereby completing the filtration of the gas. When the filter core 13 is full of impurities, the manhole cover 6 is opened, and then the butterfly screw 11 is turned to pull out the handle 10 and the filter core 13. After cleaning, it is installed again. During use, when the pressure difference exceeds the limit, the pressure relief valve installed at the valve rod joint 15 can be used for timely pressure relief.

[0036] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned implementation measures. Any technical scheme falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as the protection scope of the present application.

Claims

1. A high temperature negative pressure filter, characterized by, The utility model provides a filter cartridge, the filter cartridge bottom fixedly connected with support (2), one side of filter cartridge (1) is provided with pressure quick -opening manhole, the first air inlet is provided with first flange (9) on the first air inlet of filter cartridge (1) top near pressure quick -opening manhole side, the first flange (9) away from pressure quick -opening manhole side in filter cartridge (1) is equipped with the inclined limit ring (12), the filter cartridge (1) inside is provided with filter core (13), the opening of filter core (13) near manhole cover (6) one side is provided with connecting plate (130), connecting plate (130) and limit ring (12) are matched with fixed connection through butterfly screw (11), the first air outlet is provided with second flange (16) on the first air outlet of filter cartridge (1) away from pressure quick -opening manhole side, the first air outlet near filter cartridge (1) top is provided with plunger hole (14), the plunger hole (14) is detachably installed with valve rod joint (15), the bottom of filter core (13) near second flange (16) side in filter cartridge (1) is provided with filter core support (17).

2. The high-temperature negative pressure filter of claim 1, wherein, The pressure quick-opening manhole comprises a manhole cover (6), and one end of the manhole cover (6) is hingedly connected to the filter cartridge (1).

3. The high-temperature negative pressure filter of claim 2, wherein, The outer edge of the manhole cover (6) is circumferentially and spacedly provided with a plurality of connecting blocks (18), one side of each connecting block (18) close to the filter cartridge (1) is provided with a first clamping block (180), and a first clamping groove (181) is formed in the side of each connecting block (18) away from the filter cartridge (1). The side of the filter cartridge (1) close to the manhole cover (6) is fixedly connected with a hinge block (19) matched with the connecting blocks (18), the hinge block (19) is provided with a second clamping groove (190) matched with the first clamping block (180), and a fastening bolt (191) is hingedly arranged on the hinge block (19). The fastening bolt (191) is fixedly connected with a second clamping block (192) matched with the first clamping groove (181).

4. The high-temperature negative pressure filter of claim 2, wherein, A sight glass (7) is arranged in the middle of the manhole cover (6), a rotatable handle (8) is arranged in the middle of the sight glass (7), and a scraper is fixed to the handle (8) on the inner side of the sight glass (7).

5. The high-temperature negative pressure filter of claim 1, wherein, The number of the filter core supports (17) is three, and adjacent filter core supports (17) are arranged at an angle of 30° with respect to the center of the filter cartridge (1), and each filter core support (17) is vertically arranged.

6. The high temperature negative pressure filter of claim 1, wherein, The support (2) comprises a vertical plate (201) and a horizontal plate (200), the vertical plate (201) is welded and fixed to the top of the filter cartridge (1), and the horizontal plate (200) is fixedly connected with a supporting column (3) through double locking nuts (4) at the bottom of the horizontal plate (200).

7. The high-temperature negative pressure filter of claim 6, wherein, The transverse section of the vertical plate (201) is in the shape of "T".

8. The high temperature negative pressure filter of claim 1, wherein, The filter core (13) is a single-layer metal wire mesh structure, the diameter of the metal wire of the woven metal wire mesh is 8 mm, and the mesh size is a rhombic hole with a size of 1 mm*1 mm.

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