Drying treatment device for sludge treatment

Abstract

The utility model discloses a drying treatment device for sludge treatment, relates to the technical field of sludge treatment, and aims to solve the problems that sludge in a drying bin cannot be well conveyed in the prior art, so that the sludge cannot be completely discharged, the practicability is low, gas emitted during sludge drying is not purified and treated, and the cost is low. According to the scheme, the sludge treatment device comprises a base, a mounting mechanism is arranged at the top of the base, the mounting mechanism comprises a mounting frame connected to the outer wall of the top of the base through bolts, and a conveying assembly is arranged on the upper portion of the mounting frame; the conveying assembly comprises an upper conveying cylinder and a lower conveying cylinder. According to the sludge drying device, sludge to be dried can be rapidly conveyed, dried sludge can be rapidly discharged, the practicability is improved, heat generated during drying can be recycled, meanwhile, toxic gas can be purified and adsorbed, and the environmental protection property is improved.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, and in particular to a sludge drying treatment device. Background Technology

[0002] Sludge treatment is a process of reducing, stabilizing, and rendering harmless sludge by concentrating, conditioning, dewatering, stabilizing, drying, or incinerating it. In the sludge treatment process, drying is required.

[0003] A search revealed a Chinese patent (application number "202121048077.8") disclosing "a drying treatment device for sludge treatment." This drying treatment device includes a drying chamber containing a hollow shaft driven by a power device. The hollow shaft is equipped with blades, and has a steam inlet at one end and a steam outlet at the other. The drying chamber has a feed inlet at the top of one side and a discharge outlet at the bottom of the other side. A stirring rod is also provided between the blades of the hollow shaft. However, the above-mentioned drying treatment device has the following problems during use:

[0004] 1. The sludge in the drying chamber is stirred by the blades, but the blades cannot effectively transport the sludge in the drying chamber, resulting in the sludge not being completely discharged, which is not very practical.

[0005] 2. The gases emitted during sludge drying were not purified, causing harmful gases in the sludge to escape into the external environment, resulting in poor environmental performance. Utility Model Content

[0006] This utility model provides a sludge drying treatment device, which solves the problems of the drying treatment device proposed in the prior art, which cannot effectively transport the sludge in the drying chamber during drying, resulting in the sludge not being completely discharged, thus having low practicality, and does not purify the gas emitted during sludge drying, causing harmful gases in the sludge to escape into the external environment, resulting in poor environmental performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sludge drying treatment device includes a base. A mounting mechanism is provided on the top of the base. The mounting mechanism includes a mounting frame bolted to the outer wall of the top of the base. A conveying assembly is provided on the upper part of the mounting frame. The conveying assembly includes an upper conveying cylinder, a lower conveying cylinder, a first connecting frame fixed to the outer wall of the upper and lower conveying cylinders on opposite sides, two conveying augers respectively fitted inside the upper and lower conveying cylinders, and two driven gears respectively connected to the outer wall of one end of the two conveying augers by pins. A discharge assembly is provided at the lower part of the mounting frame. The discharge assembly includes a discharge cylinder, a second connecting frame fixed to the outer wall of one end of the discharge cylinder, a discharge auger fitted inside the second connecting frame, a driving gear connected to the outer wall of one end of the discharge auger by pins, and a reduction motor bolted to the outer wall of the top of the base. A heating assembly is provided on one side of the mounting frame. The heating assembly includes a... The mounting frame consists of a heat insulation frame connected to the lower outer wall of one side, several first ceramic heating rods fixed to the inner wall of the heat insulation frame, and several axial flow fans. Several second ceramic heating rods are bolted to the outer walls of both the first and second connecting frames. A heat exchange assembly is provided on one side of the mounting frame. The heat exchange assembly includes a heat exchange box bolted to the upper outer wall of one side of the mounting frame, a connecting plate fixed to the middle inner wall of the heat exchange box, several heat exchange plates respectively fixed to the top outer wall of the connecting plate, several heat dissipation fins respectively fixed to the bottom outer wall of the connecting plate, and a heat dissipation fan bolted to the lower outer wall of one side of the heat exchange box. Several purification components are provided on the top of the heat exchange box. The purification components include a support ring fixed to the top outer wall of the heat exchange box, an installation cylinder fixed to the top outer wall of the support ring, a pressure relief pipe penetrating and fixed to the top inner wall of the heat exchange box, and a filter element sleeved in the installation cylinder.

[0009] Preferably, a feed hopper is fixed on the inner wall of the top of the mounting frame, a first end cap is bolted to one side of the outer wall of the mounting frame, and a second end cap is bolted to the outer wall of the mounting frame on the side away from the first end cap.

[0010] Preferably, the lower part of the feed hopper is fixed to the inner wall of the top of the upper conveying cylinder. The two ends of the upper and lower conveying cylinders are respectively bolted to the outer wall of the first and second end covers. The two conveying augers are respectively connected to the outer wall of the first and second end covers through bearings. The first connecting frame is bolted to the outer wall of the second end cover. The two driven gears mesh with each other to form a transmission engagement.

[0011] Preferably, one end of the unloading cylinder is bolted to the outer wall of one side of the first end cover, and one end of the unloading cylinder passes through and is fixed to the outer wall of the second end cover. The upper part of the second connecting frame is fixed to the outer wall of one end of the lower conveying cylinder, and one side of the second connecting frame is bolted to the outer wall of one side of the first end cover. A fixing block is fixed on the inner wall of the end of the unloading cylinder near the second end cover, and one end of the unloading auger passes through and is connected to the outer wall of the fixing block through a bearing. One end of the unloading auger passes through and is connected to the outer wall of one side of the first end cover through a bearing, and the unloading auger is connected to one end of the output shaft of the reduction motor through a coupling. The driving gear and the driven gear mesh with each other to form a transmission engagement.

[0012] The above scheme involves adding sludge to the upper conveying cylinder via the feed hopper. Then, the output shaft of the geared motor drives the unloading auger and the drive gear to rotate. The drive gear drives the driven gear and the conveying auger to rotate. The conveying auger transports the sludge in the upper conveying cylinder. The sludge in the upper conveying cylinder falls into the lower conveying cylinder within the first connecting frame. The conveying auger then transports the sludge in the lower conveying cylinder. Subsequently, the sludge in the lower conveying cylinder falls into the unloading cylinder within the second connecting frame. The unloading auger transports the sludge in the unloading cylinder and delivers it to the outside of the installation frame.

[0013] Preferably, a fixing plate is bolted to one side of the outer wall of the heat insulation frame, and several axial flow fans are bolted to one side of the outer wall of the fixing plate, and one end of several second ceramic heating rods is bolted to one side of the outer wall of the first end cover and the second end cover.

[0014] The above scheme uses multiple sets of axial flow fans to transfer the heat generated by the operation of multiple first ceramic heating rods to the installation frame. The heat dries the sludge in the unloading cylinder, lower conveying cylinder and upper conveying cylinder. At the same time, multiple second ceramic heating rods operate to dry the sludge in the lower conveying cylinder and upper conveying cylinder again.

[0015] Preferably, ventilation openings are provided on one outer wall of both the heat exchange box and the mounting frame, a guide cover is fixedly provided on the lower outer wall of one side of the heat exchange box, and a conveying pipe is fixedly provided on the inner wall of one side of the guide cover, with one end of the conveying pipe passing through and fixed to the outer wall of the second end cover.

[0016] Preferably, the upper part of the pressure relief pipe is inserted through and fixed to the inner wall of the bottom of the mounting cylinder, and a pressure relief valve is clamped on the outer wall of one end of the pressure relief pipe. A cylinder cover is screwed onto the inner wall of the upper part of the mounting cylinder, and the cylinder cover abuts against the outer wall of the top of the filter element.

[0017] With the above scheme, hot air enters the heat exchange box through the vent. The hot air first contacts the heat exchange plate and exchanges heat. Then the heat exchange plate transfers the heat to the heat sink. Subsequently, the cooling fan operates to transport the heat from the lower part of the heat sink to the guide cover. The hot air is then transported to the first connecting frame through the conveying pipe to assist in drying the sludge falling from the upper conveying cylinder into the lower conveying cylinder. At the same time, the pressure relief valve is activated to transport the air in the heat exchange box into the installation cylinder. The filter element purifies the air entering the installation cylinder.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. Sludge is added to the upper conveying cylinder through the feed hopper. Then, the output shaft of the geared motor drives the unloading auger and the drive gear to rotate. The drive gear drives the driven gear and the conveying auger to rotate. The conveying auger conveys the sludge in the upper conveying cylinder. The sludge in the upper conveying cylinder falls into the lower conveying cylinder in the first connecting frame. The conveying auger conveys the sludge in the lower conveying cylinder. Then, the sludge in the lower conveying cylinder falls into the unloading cylinder in the second connecting frame. The unloading auger conveys the sludge in the unloading cylinder and transports the sludge to the outside of the installation frame. This allows for quick conveying of the sludge to be dried and quick unloading of the dried sludge, improving its practicality.

[0020] 2. Hot air enters the heat exchange box through the vent. The hot air first contacts the heat exchange plate and exchanges heat. Then, the heat exchange plate transfers the heat to the heat sink. Subsequently, the cooling fan operates to transport the heat from the lower part of the heat sink to the guide cover and then transports the hot air to the first connecting frame through the conveying pipe to assist in drying the sludge falling from the upper conveying cylinder to the lower conveying cylinder. At the same time, the pressure relief valve is activated to transport the air in the heat exchange box to the installation cylinder. The filter element purifies the air entering the installation cylinder, which can recover and reuse the heat during drying and purify and adsorb toxic gases, thus improving environmental protection.

[0021] In summary, this utility model can quickly transport and unload the dried sludge, improving its practicality. It can also recover and reuse the heat generated during drying and purify and adsorb toxic gases, thus improving its environmental friendliness. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall main structure of a sludge drying treatment device proposed in this utility model.

[0023] Figure 2 This is a front view cross-sectional structural diagram of a sludge drying treatment device proposed in this utility model.

[0024] Figure 3This is a front view structural diagram of the installation mechanism of a sludge drying treatment device proposed in this utility model.

[0025] Figure 4 This is a schematic diagram of the main structure of the conveying component of a sludge drying treatment device proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the main structure of the unloading component of a sludge drying treatment device proposed in this utility model.

[0027] Figure 6 This is a schematic diagram of the main structure of the heating component of a sludge drying device proposed in this utility model.

[0028] Figure 7 This is a side view of the heating component of a sludge drying device proposed in this utility model.

[0029] Figure 8 This is a schematic diagram of the main structure of the heat exchange component of a sludge drying device proposed in this utility model.

[0030] Figure 9 This is a side view of the heat exchange component of a sludge drying device proposed in this utility model.

[0031] Figure 10 This is a schematic diagram of the main structure of the connecting plate, heat exchange plate and heat sink of the sludge drying treatment device proposed in this utility model.

[0032] Figure 11 This is a front view cross-sectional structural diagram of the purification component of a sludge drying treatment device proposed in this utility model.

[0033] In the diagram: 1. Base; 2. Mounting mechanism; 201. Mounting frame; 202. First end cover; 203. Second end cover; 3. Conveying assembly; 301. Upper conveying cylinder; 302. Lower conveying cylinder; 303. First connecting frame; 304. Conveying auger; 305. Driven gear; 4. Unloading assembly; 401. Unloading cylinder; 402. Second connecting frame; 403. Fixing block; 404. Unloading auger; 405. Drive gear; 406. Gear motor; 5. Heating element. Components; 501, Insulation frame; 502, First ceramic heating rod; 503, Fixing plate; 504, Axial flow fan; 6, Second ceramic heating rod; 7, Heat exchange assembly; 701, Heat exchange box; 702, Connecting plate; 703, Heat exchange plate; 704, Heat sink; 705, Heat dissipation fan; 706, Guide cover; 707, Conveying pipe; 8, Purification assembly; 801, Support ring; 802, Mounting cylinder; 803, Pressure relief pipe; 804, Filter element; 805, Cylinder cover. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Example 1, referring to Figure 1-5 A sludge drying treatment device includes a base 1, a mounting mechanism 2 on the top of the base 1, and a mounting frame 201 bolted to the outer wall of the top of the base 1. A feed hopper is fixed to the inner wall of the top of the mounting frame 201. A first end cap 202 is bolted to one side of the outer wall of the mounting frame 201, and a second end cap 203 is bolted to the outer wall of the mounting frame 201 on the side away from the first end cap 202. A conveying assembly 3 is provided on the upper part of the mounting frame 201. The conveying assembly 3 includes an upper conveying cylinder 301, a lower conveying cylinder 302, and a conveyor fixed to the outer wall of the upper conveying cylinder 301 on the opposite side of the lower conveying cylinder 302. The system includes a first connecting frame 303 on the wall, two conveying augers 304 respectively fitted inside the upper conveying cylinder 301 and the lower conveying cylinder 302, and two driven gears 305 respectively connected to the outer wall of one end of the two conveying augers 304 by pins. The lower part of the feed hopper is fixed to the inner wall of the top of the upper conveying cylinder 301. The two ends of the upper conveying cylinder 301 and the lower conveying cylinder 302 are respectively bolted to the outer wall of one side of the first end cover 202 and the second end cover 203. The two conveying augers 304 are respectively connected to the outer wall of the first end cover 202 and the second end cover 203 by bearings. The first connecting frame 303 is bolted to the second end cover 202. On one side of the outer wall of the cover 203, two driven gears 305 mesh with each other to form a transmission engagement. The lower part of the mounting frame 201 is provided with a discharge assembly 4, which includes a discharge cylinder 401, a second connecting frame 402 fixed to one end of the outer wall of the discharge cylinder 401, a discharge auger 404 sleeved within the second connecting frame 402, a drive gear 405 connected to one end of the outer wall of the discharge auger 404 via a pin, and a reduction motor 406 bolted to the top outer wall of the base 1. One end of the discharge cylinder 401 is bolted to one side of the outer wall of the first end cover 202, and the other end of the discharge cylinder 401 passes through and is fixed to the second end cover 203. On the outer wall, the upper part of the second connecting frame 402 is fixed to the outer wall of one end of the lower conveying cylinder 302. One side of the second connecting frame 402 is connected to the outer wall of one side of the first end cover 202 by bolts. A fixing block 403 is fixed on the inner wall of the unloading cylinder 401 near the second end cover 203. One end of the unloading auger 404 passes through and is connected to the outer wall of the fixing block 403 by bearing. One end of the unloading auger 404 passes through and is connected to the outer wall of one side of the first end cover 202 by bearing. The unloading auger 404 is connected to one end of the output shaft of the reduction motor 406 by a coupling. The driving gear 405 and the driven gear 305 mesh with each other to form a transmission cooperation.

[0036] Example 2, refer to Figure 6-7 A sludge drying treatment device further includes a heating component 5. The heating component 5 includes a heat insulation frame 501 bolted to the lower outer wall of a mounting frame 201, a plurality of first ceramic heating rods 502 fixed to the inner wall of the heat insulation frame 501, and a plurality of axial flow fans 504. A fixing plate 503 is bolted to the outer wall of the heat insulation frame 501. The plurality of axial flow fans 504 are bolted to the outer wall of the fixing plate 503. A plurality of second ceramic heating rods 6 are bolted to the outer wall of the first connecting frame 303 and the second connecting frame 402. One end of the plurality of second ceramic heating rods 6 is bolted to the outer wall of the first end cap 202 and the second end cap 203.

[0037] Example 3, referring to Figure 8-11 A sludge drying treatment device further includes a heat exchange assembly 7. The heat exchange assembly 7 includes a heat exchange box 701 bolted to the upper outer wall of one side of a mounting frame 201, a connecting plate 702 fixed to the middle inner wall of the heat exchange box 701, several heat exchange plates 703 respectively fixed to the top outer wall of the connecting plate 702, several heat dissipation fins 704 respectively fixed to the bottom outer wall of the connecting plate 702, and a cooling fan 705 bolted to the lower outer wall of one side of the heat exchange box 701. Ventilation openings are provided on both the heat exchange box 701 and the outer wall of one side of the mounting frame 201. A guide cover 706 is fixed to the lower outer wall of one side of the heat exchange box 701, and a conveyor belt is fixed to the inner wall of one side of the guide cover 706. The delivery pipe 707 has one end that passes through and is fixed to the outer wall of the second end cover 203. The top of the heat exchange box 701 is provided with several purification components 8. The purification components 8 include a support ring 801 fixed to the outer wall of the top of the heat exchange box 701, an installation cylinder 802 fixed to the outer wall of the top of the support ring 801, a pressure relief pipe 803 that passes through and is fixed to the inner wall of the top of the heat exchange box 701, and a filter element 804 sleeved in the installation cylinder 802. The upper part of the pressure relief pipe 803 passes through and is fixed to the inner wall of the bottom of the installation cylinder 802. A pressure relief valve is clamped on the outer wall of one end of the pressure relief pipe 803. A cylinder cover 805 is screwed to the inner wall of the upper part of the installation cylinder 802. The cylinder cover 805 abuts against the outer wall of the top of the filter element 804.

[0038] Working principle: Sludge is added to the upper conveying cylinder 301 through the feed hopper. Then, the output shaft of the reduction motor 406 drives the unloading auger 404 and the drive gear 405 to rotate. The drive gear 405 drives the driven gear 305 and the conveying auger 304 to rotate. The conveying auger 304 conveys the sludge in the upper conveying cylinder 301. The sludge in the upper conveying cylinder 301 falls into the lower conveying cylinder 302 within the first connecting frame 303. The conveying auger 304 then conveys the sludge in the lower conveying cylinder 302. Subsequently, the sludge in the lower conveying cylinder 302 falls into the unloading cylinder 401 within the second connecting frame 402. The unloading auger 404 conveys the sludge in the unloading cylinder 401 and transports it to the outside of the mounting frame 201. Multiple sets of axial flow fans 504 transfer the heat generated by the operation of multiple first ceramic heating rods 502 into the mounting frame 201. Heat is used to dry the sludge in the unloading cylinder 401, the lower conveying cylinder 302, and the upper conveying cylinder 302. At the same time, multiple second ceramic heating rods 6 operate to further dry the sludge in the lower conveying cylinder 302 and the upper conveying cylinder 301. Hot air enters the heat exchange box 701 through the vent. The hot air first contacts the heat exchange plate 703 and exchanges heat. Then, the heat exchange plate 703 transfers the heat to the heat sink 704. Subsequently, the cooling fan 705 operates to transport the heat from the lower part of the heat sink 704 to the guide cover 706 and then transports the hot air to the first connecting frame 303 through the conveying pipe 707 to assist in drying the sludge falling from the upper conveying cylinder 301 into the lower conveying cylinder 302. At the same time, the pressure relief valve is activated to transport the air in the heat exchange box 701 into the mounting cylinder 802. The filter element 804 purifies the air entering the mounting cylinder 802.

[0039] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sludge drying treatment device, comprising a base (1), characterized in that, The base (1) is provided with a mounting mechanism (2) on its top, the mounting mechanism (2) including a mounting frame (201) which is bolted to the outer wall of the top of the base (1). The mounting frame (201) is provided with a conveying assembly (3) on its upper part. The conveying assembly (3) includes an upper conveying cylinder (301), a lower conveying cylinder (302), a first connecting frame (303) fixed on the outer wall of the upper conveying cylinder (301) and the lower conveying cylinder (302) on opposite sides, two conveying augers (304) respectively sleeved in the upper conveying cylinder (301) and the lower conveying cylinder (302), and two driven gears (305) respectively connected to the outer wall of one end of the two conveying augers (304) by pins. The lower part of the mounting frame (201) is provided with a discharge assembly (4). The discharge assembly (4) includes a discharge cylinder (401), a second connecting frame (402) fixed on the outer wall of one end of the discharge cylinder (401), a discharge auger (404) sleeved in the second connecting frame (402), a drive gear (405) connected to the outer wall of one end of the discharge auger (404) by a pin, and a reduction motor (406) connected to the top outer wall of the base (1) by bolts. The mounting frame (201) is provided with a heating component (5) on one side. The heating component (5) includes a heat insulation frame (501) connected to the lower outer wall of the mounting frame (201) by bolts, a number of first ceramic heating rods (502) fixed on the inner wall of the heat insulation frame (501), and a number of axial flow fans (504). Several second ceramic heating rods (6) are bolted to the outer wall of one side of the first connecting frame (303) and the second connecting frame (402); The mounting frame (201) is provided with a heat exchange assembly (7) on one side. The heat exchange assembly (7) includes a heat exchange box (701) connected to the upper outer wall of the mounting frame (201) by bolts, a connecting plate (702) fixed to the middle inner wall of the heat exchange box (701), a number of heat exchange plates (703) respectively fixed to the top outer wall of the connecting plate (702), a number of heat sinks (704) respectively fixed to the bottom outer wall of the connecting plate (702), and a heat dissipation fan (705) connected to the lower outer wall of the heat exchange box (701) by bolts. The heat exchange box (701) is provided with a number of purification components (8) on the top. The purification components (8) include a support ring (801) fixed on the outer wall of the top of the heat exchange box (701), an installation cylinder (802) fixed on the outer wall of the top of the support ring (801), a pressure relief pipe (803) that penetrates and is fixed on the inner wall of the top of the heat exchange box (701), and a filter element (804) sleeved in the installation cylinder (802).

2. The sludge drying treatment device according to claim 1, characterized in that, A feed hopper is fixed on the inner wall of the top of the mounting frame (201). A first end cap (202) is bolted to the outer wall of one side of the mounting frame (201), and a second end cap (203) is bolted to the outer wall of the mounting frame (201) away from the first end cap (202).

3. The sludge drying treatment device according to claim 2, characterized in that, The lower part of the feed hopper is fixed on the inner wall of the top of the upper conveying cylinder (301). The two ends of the upper conveying cylinder (301) and the lower conveying cylinder (302) are respectively bolted to the outer wall of the first end cover (202) and the second end cover (203). The two conveying augers (304) are respectively connected to the outer wall of the first end cover (202) and the second end cover (203) through bearings. The first connecting frame (303) is bolted to the outer wall of the second end cover (203). The two driven gears (305) mesh with each other to form a transmission cooperation.

4. The sludge drying treatment device according to claim 2, characterized in that, One end of the unloading cylinder (401) is bolted to the outer wall of the first end cover (202), and one end of the unloading cylinder (401) passes through and is fixed to the outer wall of the second end cover (203). The upper part of the second connecting frame (402) is fixed to the outer wall of one end of the lower conveying cylinder (302), and one side of the second connecting frame (402) is bolted to the outer wall of one side of the first end cover (202). The unloading cylinder (401) is close to the second end cover (203). A fixed block (403) is fixed on the inner wall of one end, and one end of the unloading auger (404) is connected to the outer wall of the fixed block (403) through a bearing. One end of the unloading auger (404) is connected to the outer wall of the first end cover (202) through a bearing. The unloading auger (404) is connected to one end of the output shaft of the geared motor (406) through a coupling. The driving gear (405) and the driven gear (305) mesh with each other to form a transmission cooperation.

5. The sludge drying treatment apparatus according to claim 1, characterized in that, A fixing plate (503) is bolted to one side of the outer wall of the heat insulation frame (501), and several axial flow fans (504) are bolted to one side of the outer wall of the fixing plate (503). One end of several second ceramic heating rods (6) is bolted to one side of the outer wall of the first end cover (202) and the second end cover (203).

6. The sludge drying treatment apparatus according to claim 1, characterized in that, Ventilation openings are provided on one side of the heat exchange box (701) and the mounting frame (201). A guide cover (706) is fixedly provided on the lower outer wall of one side of the heat exchange box (701), and a conveying pipe (707) is fixedly provided on the inner wall of one side of the guide cover (706). One end of the conveying pipe (707) passes through and is fixedly provided on the outer wall of the second end cover (203).

7. The sludge drying treatment apparatus according to claim 1, characterized in that, The pressure relief pipe (803) is inserted through and fixed to the inner wall of the bottom of the mounting cylinder (802) at the upper part, and a pressure relief valve is clamped on the outer wall of one end of the pressure relief pipe (803). A cylinder cover (805) is screwed onto the inner wall of the upper part of the mounting cylinder (802), and the cylinder cover (805) abuts against the outer wall of the top of the filter element (804).

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