CN214597615U

CN214597615U - Sewage filtering device utilizing centrifugal force principle

Info

Publication number: CN214597615U
Application number: CN202120533305.4U
Authority: CN
Inventors: 邓元; 李丽; 唐伟; 李丹
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-11-05
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a sewage filtering device utilizing the centrifugal force principle, which comprises a base, an outer cylinder mechanism, a filtering mechanism and a drainage cleaning mechanism; the outer barrel mechanism is fixedly arranged on the upper surface of the base, the filtering mechanism is arranged on the base and is positioned inside the outer barrel mechanism, and the drainage cleaning mechanism is arranged above the base; the utility model has the advantages that the friction between the middle cylinder and the inner cylinder as well as the base can be reduced by arranging the plurality of permanent magnetic rings and the magnetic suspension rings, the middle cylinder and the inner cylinder are protected to a certain extent, and the service life of the device can be prolonged; by arranging the drainage cleaning mechanism, the filter cloth on the inner barrel can be cleaned in real time; through setting up the filter ring, can filter the sewage that gets into in the well section of thick bamboo, prevent that debris in the sewage from dropping and causing the jam to the junction of inner tube and base.

Description

Sewage filtering device utilizing centrifugal force principle

Technical Field

The utility model relates to a sewage treatment technical field. In particular to a sewage filtering device utilizing the centrifugal force principle.

Background

In recent years, the discharge amount of industrial sewage and domestic sewage in China is on the increasing trend year by year, the direct discharge of untreated or inappropriately treated sewage into the nature seriously affects the environmental sanitation and threatens the drinking water safety of people, so that the treatment of sewage is urgent: in order to ensure that sewage can meet the process of purifying a certain water body after being drained or reused, the sewage treatment is widely applied to various fields of buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and the sewage treatment also increasingly enters the daily life of common people.

In sewage treatment, before sending sewage into purifier, often need carry out preliminary treatment to sewage, filter out great solid particle and cotton fibre etc. in the sewage earlier, can reach certain guard action to sewage purifier, and to the preliminary treatment of sewage, it is very common to utilize centrifugal force's principle to filter sewage, but the sewage filter equipment who utilizes centrifugal force principle in the current application rubs the effect of power when the gas rotates for this device life is very short.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to provide a sewage filtering apparatus using the centrifugal force principle, which can reduce the friction force.

In order to solve the technical problem, the utility model provides a following technical scheme:

the sewage filtering device utilizing the centrifugal force principle comprises a base, an outer barrel mechanism, a filtering mechanism and a drainage cleaning mechanism;

the outer barrel mechanism is fixedly installed on the upper surface of the base, the filtering mechanism is installed on the base and located inside the outer barrel mechanism, and the drainage cleaning mechanism is installed above the base.

The sewage filtering device utilizing the centrifugal force principle comprises an outer barrel, a sewage discharge pipe, a valve and an inductor, wherein the outer barrel is arranged on the outer barrel;

the outer barrel is fixedly arranged on the upper surface of the base, a plurality of blow-off pipes are integrally arranged at the bottom end of the outer surface of the outer barrel, the plurality of blow-off pipes are uniformly distributed at the bottom end of the outer surface of the outer barrel, and valves are arranged on the plurality of blow-off pipes;

and the position of the inner surface of the outer barrel, which is close to the top end, is provided with an inductor.

The sewage filtering device utilizing the centrifugal force principle comprises a permanent magnet slide rail, a first magnetic suspension ring, a bottom ring, a middle cylinder, a leakage hole, a one-way door, a hinge, a first gear ring, a first motor, a first gear, a placing groove, an inner cylinder, a first permanent magnet ring, a second magnetic suspension ring, a second permanent magnet ring, a third magnetic suspension ring, a second motor, a clamping groove, a filtering ring and a water inlet pipe;

the permanent magnet sliding rail is fixedly installed inside the base, the permanent magnet sliding rail is annular, a first magnetic suspension ring is installed inside the permanent magnet sliding rail in a sliding mode, a bottom ring is fixedly installed on the upper surface of the first magnetic suspension ring, the bottom ring and the permanent magnet sliding rail are designed coaxially, and the bottom ring penetrates through the top of the permanent magnet sliding rail;

a middle barrel is integrally arranged at the top of the bottom ring, the joint of the middle barrel and the base is subjected to waterproof treatment, and the top end of the middle barrel is lower than that of the outer barrel;

a plurality of leakage holes are formed in the wall, close to the bottom end, of the middle barrel, are uniformly distributed on the same horizontal plane, and the outer sides of the plurality of leakage holes are hinged with one-way doors through hinges;

a first gear ring is fixedly arranged on the outer surface of the bottom ring, a first motor is fixedly arranged on the lower surface of the base, an output shaft of the first motor penetrates through the lower surface of the base and is positioned in the base, and a first gear is arranged in the base and is meshed with the first gear ring;

a placing groove is formed in the center of the upper surface of the base, an inner barrel is arranged in the placing groove, the inner barrel, the middle barrel and the outer barrel are coaxially designed, the top end of the inner barrel is higher than that of the middle barrel, the top end of the inner barrel is lower than that of the outer barrel, and the outer wall of the inner barrel is composed of filter cloth and a support;

the lower surface of the placing groove is provided with a first permanent magnet ring, the first permanent magnet ring and the placing groove are designed coaxially, the lower surface of the inner cylinder is provided with a second magnetic suspension ring, and the second magnetic suspension ring is positioned right above the first permanent magnet ring;

a second permanent magnet ring is arranged on the inner surface of the placing groove and close to the top end, a third magnetic suspension ring is arranged on the outer surface of the inner cylinder and close to the bottom end, and the third magnetic suspension ring is positioned below the second permanent magnet ring;

a second motor is arranged at the center of the lower surface of the base, and an output shaft of the second motor penetrates through the base and is connected with the center of the bottom of the inner barrel through a key;

the inner surface of the middle cylinder and the outer surface of the inner cylinder are both provided with a clamping groove at the same horizontal plane, the clamping grooves on the middle cylinder and the inner cylinder are connected through a filter ring, and the rotation of the middle cylinder and the inner cylinder is not influenced by the filter ring;

a water inlet pipe is arranged at the upper end of the outer barrel, and a water inlet of the water inlet pipe is positioned right above the middle barrel;

the inductor is located above the top end of the middle barrel, and the inductor is located below the top end of the inner barrel.

According to the sewage filtering device utilizing the centrifugal force principle, the drainage cleaning mechanism comprises a supporting rod, a limiting column, a second toothed ring, a third motor, a second gear, a telescopic rod, a water pumping pipe, an annular rotary table and an air injection hole;

the supporting rod is inserted in the base, the supporting rod is L-shaped, a limiting column is coaxially arranged on the outer surface of the part, located in the base, of the supporting rod, and the limiting column can rotate freely;

a second gear ring is mounted on the outer surface of the limiting column, a third motor is fixedly mounted on one side of the base, a second gear is rotatably mounted at the output end of the third motor, and the second gear is in meshed connection with the second gear ring;

the top end of the supporting rod is perpendicular to the base at the position close to the other end and is provided with a telescopic rod in a penetrating mode, the maximum stroke of the bottom end of the telescopic rod can be flush with the filtering ring, and the inside of the telescopic rod is designed to be a cavity;

a water pumping pipe is arranged in the telescopic rod, the water pumping pipe is a hose which is not easy to bend, the bottom end of the water pumping pipe penetrates through the telescopic rod and is positioned below the telescopic rod, and the other end of the water pumping pipe is connected with a water pumping pump;

the annular turntable is installed to the bottom of telescopic link, the annular turntable has waterproof function, evenly set up the fumarole of a plurality of perpendicular to inner tubes on the annular turntable, it is a plurality of the fumarole all is connected with the high pressure gas-supply pipe in the telescopic link cavity.

The technical scheme of the utility model following profitable technological effect has been obtained:

1. the utility model has the advantages that the friction between the middle cylinder and the inner cylinder as well as the base can be reduced by arranging the plurality of permanent magnetic rings and the magnetic suspension rings, the middle cylinder and the inner cylinder are protected to a certain extent, and the service life of the device can be prolonged; the first motor drives the middle cylinder to rotate by driving the first gear and the first gear ring to rotate, when the middle cylinder rotates, the rotation of the first magnetic suspension ring in the permanent magnetic slide rail can not receive the action of friction force, the middle cylinder can not receive the action of friction force when rotating, and the permanent magnetic slide rail can completely surround the first magnetic suspension ring, so that the stability of the middle cylinder can be ensured; because the suspension effect between first permanent magnetic ring and the second magnetic suspension ring has the suspension effect between second permanent magnetic ring and the third magnetic suspension ring in addition, can guarantee that the inner tube is stable places in the standing groove to can not rub each other with the base, rethread second motor drives the inner tube and rotates, through above design, can effectively reduce the friction between well section of thick bamboo and inner tube and base.

2. The utility model can clean the filter cloth on the inner cylinder in real time by arranging the drainage cleaning mechanism; after this device work a period, start the third motor, make the telescopic link be located the inner tube directly over, then start the air pump, make annular turntable begin to rotate again, slowly descend the telescopic link again, the high-pressure gas who comes out in the messenger air pump passes through the fumarole blowout on the annular turntable, through the rotation of annular turntable, high-pressure gas can all-roundly spout the filter cloth on the inner tube on, clears up the filter cloth.

3. The utility model discloses, through setting up the filter ring, can filter the sewage that gets into in the well section of thick bamboo, prevent that debris in the sewage from dropping and causing the jam to the junction of inner tube and base.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1 of the present invention.

The reference numbers in the figures denote: 100-a base; 200-an outer cylinder mechanism; 300-a filter mechanism; 400-a drainage cleaning mechanism; 201-outer cylinder; 202-a sewage draining pipe; 203-a valve; 204-a sensor; 301-permanent magnet slide rail; 302-a first magnetic suspension ring; 303-bottom ring; 304-a middle cylinder; 305-a leak hole; 306-a one-way gate; 307-hinge; 308-a first toothed ring; 309-a first motor; 310-a first gear; 311-placing slots; 312-inner cylinder; 313-a first permanent magnet ring; 314-a second magnetic suspension ring; 315-a second permanent magnet ring; 316-third magnetic suspension ring; 317-a second motor; 318-card slot; 319-filter ring; 320-a water inlet pipe; 401-support bars; 402-a spacing post; 403-a second toothed ring; 404-a third motor; 405-a second gear; 406-a telescoping rod; 407-pumping pipe; 408-an annular turntable; 409-gas injection holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A sewage filtering device utilizing the centrifugal force principle comprises a base 100, an outer cylinder mechanism 200, a filtering mechanism 300 and a drainage cleaning mechanism 400; the outer cylinder mechanism 200 is fixedly installed on the upper surface of the base 100, the filter mechanism 300 is installed on the base 100, the filter mechanism 300 is located inside the outer cylinder mechanism 200, and the drainage cleaning mechanism 400 is installed above the base 100.

As shown in fig. 1-2, the tub mechanism 200 comprises a tub 201, a drain 202, a valve 203 and a sensor 204; the outer cylinder 201 is fixedly arranged on the upper surface of the base 100, the bottom end of the outer surface of the outer cylinder 201 is integrally provided with a plurality of sewage pipes 202, the plurality of sewage pipes 202 are uniformly distributed at the bottom end of the outer surface of the outer cylinder 201, and the plurality of sewage pipes 202 are provided with valves 203; an inductor 204 is arranged on the inner surface of the outer cylinder 201 close to the top end; the filtering mechanism 300 comprises a permanent magnet slide rail 301, a first magnetic suspension ring 302, a bottom ring 303, a middle barrel 304, a leak hole 305, a one-way door 306, a hinge 307, a first gear ring 308, a first motor 309, a first gear 310, a placing groove 311, an inner barrel 312, a first permanent magnet ring 313, a second magnetic suspension ring 314, a second permanent magnet ring 315, a third magnetic suspension ring 316, a second motor 317, a clamping groove 318, a filter ring 319 and a water inlet pipe 320; a permanent magnet slide rail 301 is fixedly installed inside the base 100, the permanent magnet slide rail 301 is annular, a first magnetic suspension ring 302 is installed inside the permanent magnet slide rail 301 in a sliding mode, a bottom ring 303 is fixedly installed on the upper surface of the first magnetic suspension ring 302, the bottom ring 303 and the permanent magnet slide rail 301 are designed coaxially, and the bottom ring 303 penetrates through the top of the permanent magnet slide rail 301; the top of the bottom ring 303 is integrally provided with a middle barrel 304, the joint of the middle barrel 304 and the base 100 is subjected to waterproof treatment, and the top end of the middle barrel 304 is lower than that of the outer barrel 201; a plurality of leakage holes 305 are formed in the wall, close to the bottom end, of the middle barrel 304, the leakage holes 305 are uniformly distributed on the same horizontal plane, and the outer sides of the leakage holes 305 are hinged with one-way doors 306 through hinges 307; a first gear ring 308 is fixedly installed on the outer surface of the bottom ring 303, a first motor 309 is fixedly installed on the lower surface of the base 100, an output shaft of the first motor 309 penetrates through the lower surface of the base 100 and is located inside the base 100, a first gear 310 is installed on the inner surface of the base 100, and the first gear 310 is meshed with the first gear ring 308; a placing groove 311 is formed in the center of the upper surface of the base 100, an inner cylinder 312 is installed in the placing groove 311, the inner cylinder 312, the middle cylinder 304 and the outer cylinder 201 are coaxially designed, the top end of the inner cylinder 312 is higher than the top end of the middle cylinder 304, the top end of the inner cylinder 312 is lower than the top end of the outer cylinder 201, and the outer wall of the inner cylinder 312 is composed of filter cloth and a support; a first permanent magnet ring 313 is mounted on the lower surface of the placing groove 311, the first permanent magnet ring 313 and the placing groove 311 are designed coaxially, a second magnetic suspension ring 314 is mounted on the lower surface of the inner cylinder 312, and the second magnetic suspension ring 314 is positioned right above the first permanent magnet ring 313; a second permanent magnet ring 315 is arranged on the inner surface of the placing groove 311 near the top end, a third magnetic suspension ring 316 is arranged on the outer surface of the inner cylinder 312 near the bottom end, and the third magnetic suspension ring 316 is arranged below the second permanent magnet ring 315; a second motor 317 is arranged at the center of the lower surface of the base 100, and an output shaft of the second motor 317 penetrates through the base 100 and is connected with the center of the bottom of the inner cylinder 312 through a key; the same horizontal plane of the inner surface of the middle cylinder 304 and the outer surface of the inner cylinder 312 is provided with a clamping groove 318, the clamping grooves 318 on the middle cylinder 304 and the inner cylinder 312 are connected through a filter ring 319, and the filter ring 319 does not influence the rotation of the middle cylinder 304 and the inner cylinder 312; the upper end of the outer barrel 201 is provided with a water inlet pipe 320, and the water inlet of the water inlet pipe 320 is positioned right above the middle barrel 304; the inductor 204 is positioned above the top end of the middle cylinder 304, and the inductor 204 is positioned below the top end of the inner cylinder 312; the drainage cleaning mechanism 400 comprises a support rod 401, a limiting column 402, a second gear ring 403, a third motor 404, a second gear 405, a telescopic rod 406, a water pumping pipe 407, an annular turntable 408 and a gas injection hole 409; the supporting rod 401 is inserted in the base 100, the supporting rod 401 is L-shaped, the outer surface of the supporting rod 401 positioned in the base 100 is coaxially provided with a limiting column 402, and the limiting column 402 can rotate freely; a second gear ring 403 is arranged on the outer surface of the limiting column 402, a third motor 404 is fixedly arranged on one side of the base 100, a second gear 405 is rotatably arranged at the output end of the third motor 404, and the second gear 405 is meshed with the second gear ring 403; the top end of the supporting rod 401 is perpendicular to the base 100 at the position close to the other end and is provided with a telescopic rod 406 in a penetrating manner, the maximum stroke of the bottom end of the telescopic rod 406 can be flush with the filter ring 319, and the inside of the telescopic rod 406 is designed into a cavity; a water pumping pipe 407 is installed inside the telescopic rod 406, the water pumping pipe 407 is a flexible pipe which is not easy to bend, the bottom end of the water pumping pipe 407 penetrates through the telescopic rod 406 and is located below the telescopic rod 406, and the other end of the water pumping pipe 407 is connected with a water pump; annular carousel 408 is installed to the bottom of telescopic link 406, and annular carousel 408 has waterproof function, evenly sets up the fumarole 409 of a plurality of perpendicular to inner tube 312 on the annular carousel 408, and a plurality of fumaroles 409 all are connected with the high-pressure gas-supply pipe in the telescopic link 406 cavity.

The working principle is as follows: when this device is handled sewage, in adding well section of thick bamboo 304 with sewage through inlet tube 320, through the filtration of inner tube 312 surface filter cloth, solid particle and the cotton fibre material in the sewage can be stopped to stay in well section of thick bamboo 304, sewage gets into inner tube 312 and is taken out by drinking-water pipe 407, make first motor 309 corotation, can drive well section of thick bamboo 304 and carry out the corotation, then make second motor 317 reversal, can drive inner tube 312 reversal, because well section of thick bamboo 304 and inner tube 312 rotate to different directions, solid particle in the sewage in well section of thick bamboo 304 can be because the outside of centrifugal force effect gathering to well section of thick bamboo 304 bottom, then open check gate 306 and fall into urceolus 201 from the small opening 305 in, then take out from blow off pipe 202, when the water level in the urceolus 201 reachs inductor 204, stop supplying water.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.

Claims

1. A sewage filtering device utilizing the centrifugal force principle is characterized by comprising a base (100), an outer barrel mechanism (200), a filtering mechanism (300) and a drainage cleaning mechanism (400);

the outer barrel mechanism (200) is fixedly arranged on the upper surface of the base (100), the filtering mechanism (300) is arranged on the base (100), the filtering mechanism (300) is positioned in the outer barrel mechanism (200), and the drainage cleaning mechanism (400) is arranged above the base (100);

the outer cylinder mechanism (200) comprises an outer cylinder (201), a sewage discharge pipe (202), a valve (203) and an inductor (204);

the outer cylinder (201) is fixedly arranged on the upper surface of the base (100), a plurality of sewage pipes (202) are integrally arranged at the bottom end of the outer surface of the outer cylinder (201), the plurality of sewage pipes (202) are uniformly distributed at the bottom end of the outer surface of the outer cylinder (201), and valves (203) are arranged on the plurality of sewage pipes (202);

an inductor (204) is arranged on the inner surface of the outer cylinder (201) close to the top end;

the filtering mechanism (300) comprises a permanent magnet slide rail (301), a first magnetic suspension ring (302), a bottom ring (303), a middle barrel (304), a leakage hole (305), a one-way door (306), a hinge (307), a first gear ring (308), a first motor (309), a first gear (310), a placing groove (311), an inner barrel (312), a first permanent magnet ring (313), a second magnetic suspension ring (314), a second permanent magnet ring (315), a third magnetic suspension ring (316), a second motor (317), a clamping groove (318), a filtering ring (319) and a water inlet pipe (320);

a permanent magnet slide rail (301) is fixedly installed inside the base (100), the permanent magnet slide rail (301) is annular, a first magnetic suspension ring (302) is slidably installed inside the permanent magnet slide rail (301), a bottom ring (303) is fixedly installed on the upper surface of the first magnetic suspension ring (302), the bottom ring (303) and the permanent magnet slide rail (301) are coaxially designed, and the bottom ring (303) penetrates through the top design of the permanent magnet slide rail (301);

a middle barrel (304) is integrally installed at the top of the bottom ring (303), the joint of the middle barrel (304) and the base (100) is subjected to waterproof treatment, and the top end of the middle barrel (304) is lower than that of the outer barrel (201);

a plurality of leakage holes (305) are formed in the wall, close to the bottom end, of the middle barrel (304), the leakage holes (305) are uniformly distributed on the same horizontal plane, and the outer sides of the leakage holes (305) are hinged with one-way doors (306) through hinges (307);

a first toothed ring (308) is fixedly installed on the outer surface of the bottom ring (303), a first motor (309) is fixedly installed on the lower surface of the base (100), an output shaft of the first motor (309) penetrates through the lower surface of the base (100) and is located inside the base (100) to be provided with a first gear (310), and the first gear (310) is meshed with the first toothed ring (308);

a placement groove (311) is formed in the center of the upper surface of the base (100), an inner cylinder (312) is installed inside the placement groove (311), the inner cylinder (312), the middle cylinder (304) and the outer cylinder (201) are coaxially designed, the top end of the inner cylinder (312) is higher than that of the middle cylinder (304), the top end of the inner cylinder (312) is lower than that of the outer cylinder (201), and the outer wall of the inner cylinder (312) is composed of filter cloth and a support;

a first permanent magnet ring (313) is mounted on the lower surface of the placing groove (311), the first permanent magnet ring (313) and the placing groove (311) are coaxially designed, a second magnetic suspension ring (314) is mounted on the lower surface of the inner cylinder (312), and the second magnetic suspension ring (314) is located right above the first permanent magnet ring (313);

a second permanent magnet ring (315) is arranged on the inner surface of the placing groove (311) close to the top end, a third magnetic suspension ring (316) is arranged on the outer surface of the inner cylinder (312) close to the bottom end, and the third magnetic suspension ring (316) is positioned below the second permanent magnet ring (315);

a second motor (317) is arranged at the center of the lower surface of the base (100), and an output shaft of the second motor (317) penetrates through the base (100) and is connected with the center of the bottom of the inner cylinder (312) through a key;

clamping grooves (318) are formed in the same horizontal plane of the inner surface of the middle barrel (304) and the outer surface of the inner barrel (312), the clamping grooves (318) in the middle barrel (304) and the inner barrel (312) are connected through a filter ring (319), and the filter ring (319) does not influence the rotation of the middle barrel (304) and the inner barrel (312);

the upper end of the outer barrel (201) is provided with a water inlet pipe (320), and a water inlet of the water inlet pipe (320) is positioned right above the middle barrel (304);

the inductor (204) is positioned above the top end of the middle cylinder (304), and the inductor (204) is positioned below the top end of the inner cylinder (312).

2. The sewage filtering apparatus using centrifugal force principle according to claim 1, wherein said drainage cleaning mechanism (400) comprises a support rod (401), a limit column (402), a second gear ring (403), a third motor (404), a second gear (405), a telescopic rod (406), a water pumping pipe (407), an annular turntable (408) and an air injection hole (409);

the supporting rod (401) is inserted into the base (100), the supporting rod (401) is L-shaped, a limiting column (402) is coaxially arranged on the outer surface of the part, located in the base (100), of the supporting rod (401), and the limiting column (402) can rotate freely;

a second toothed ring (403) is mounted on the outer surface of the limiting column (402), a third motor (404) is fixedly mounted on one side of the base (100), a second gear (405) is rotatably mounted at the output end of the third motor (404), and the second gear (405) is meshed with the second toothed ring (403);

the top end of the supporting rod (401) is perpendicular to the base (100) at the position close to the other end and is provided with a telescopic rod (406) in a penetrating manner, the maximum stroke of the bottom end of the telescopic rod (406) can be aligned with the filtering ring (319), and the inside of the telescopic rod (406) is designed into a cavity;

a water pumping pipe (407) is installed inside the telescopic rod (406), the water pumping pipe (407) is a hose which is not easy to bend, the bottom end of the water pumping pipe (407) penetrates through the telescopic rod (406) and is located below the telescopic rod (406), and the other end of the water pumping pipe (407) is connected with a water pump;

annular carousel (408) is installed to the bottom of telescopic link (406), annular carousel (408) has waterproof function, evenly set up fumarole (409) of a plurality of perpendicular to inner tube (312) on annular carousel (408), it is a plurality of fumarole (409) all are connected with the high pressure gas-supply pipe in telescopic link (406) cavity.