CN113006210B

CN113006210B - Wear-reducing drainer

Info

Publication number: CN113006210B
Application number: CN202110224860.3A
Authority: CN
Inventors: 蔡建波; 赵高杰; 张述鹏
Original assignee: Taizhou New Sanhe Sanitary Ware Co ltd
Current assignee: Taizhou New Sanhe Sanitary Ware Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-08-12
Anticipated expiration: 2041-03-01
Also published as: CN113006210A

Abstract

The application relates to a drainer capable of reducing abrasion, which relates to the field of drainers and comprises a shell, wherein a drainage channel and a bouncing valve core are arranged in the shell; still including being located the base of casing below, the casing is equipped with the mounting hole, and the base is equipped with just to the screw hole of mounting hole, wears to be equipped with the bolt in the mounting hole, and the bolt includes screw thread section and twisting head, screw thread section and screw hole threaded connection, and twisting head is located one side that the mounting hole deviates from the screw hole, and the casing is equipped with sealed pad one towards the base, and the base is equipped with sealed pad two towards the casing. In the process of installing the drainer, the abrasion of the first sealing gasket and the second sealing gasket can be prevented, and the damage probability is reduced; when the upper wall and the lower wall of the water tank are not parallel, the first sealing gasket and the second sealing gasket can be reliably pressed, so that sealing is ensured; the supporting rod and the connecting part can rotate relatively, and the garbage blocking device has a cutting effect on the blocked garbage.

Description

Wear-reducing drainer

Technical Field

The application relates to the field of drainers, in particular to a drainer capable of reducing abrasion.

Background

The drainer is a drainage device installed at a bathtub, a basin, a water tank and the like, is widely applied to bathroom products, and can be divided into a flip type drainer and a bounce valve core type drainer according to different principles.

Chinese utility model patent with grant bulletin number CN212053048U discloses an easy-to-clean spring type drainer, including lid, downcomer, mount pad, spring core, filter basket and coupling mechanism, the lid below center is fixed with a cylinder ring, the cylinder ring is coaxial with the downcomer, cylinder ring outer wall is equipped with the seal groove, the seal groove internal fixation has the sealing washer, the mount pad is fixed on the downcomer inner wall, spring core one end is fixed on the mount pad, the other end and lid threaded connection, the lid reciprocates along with the spring core, when moving to the peak on the lid, the sealing washer is located outside the downcomer, when the lid moves down the minimum, the sealing washer is located the downcomer. The connecting thread, the fixing nut and the two rubber gaskets are arranged outside the sewer pipe, the fixing nut is connected with the connecting thread, the rubber gaskets are positioned between the top end of the sewer pipe and the fixing nut, the sewer pipe is conveniently connected with a sewage pipeline and a washbasin or a sink through the fixing nut and the connecting thread, and the rubber gaskets seal the joint. The rubber gasket is the sealing gasket.

According to the related technology, the two sealing gaskets are respectively positioned on the upper side and the lower side of the bottom wall of the water tank, when the drainer is installed in the water tank, the fixing nut needs to be rotated, the two sealing gaskets move to clamp the bottom wall of the water tank, and the sealing gaskets are flattened to realize sealing. However, in the process of rotating the fixing nut, relative rotation must exist between the sealing gasket and the wall surface of the fixing nut or the water tank, and the sealing gasket is easy to wear and even damaged.

Disclosure of Invention

In order to reduce the probability that the first sealing gasket and the second sealing gasket are abraded or damaged in the process of installing the drainer, the drainer with the abrasion reduced is provided.

The application provides a reduce hydrophone down of wearing and tearing adopts following technical scheme:

a drainer capable of reducing abrasion comprises a shell, wherein a drainage channel and a bounce valve core are arranged in the shell, a water inlet communicated with the drainage channel is formed in the top of the shell, a support is arranged on the inner wall of the shell, the lower end of the bounce valve core is fixed on the support, a cover plate is fixed at the upper end of the bounce valve core, and the bounce valve core can move the cover plate to open and close the water inlet through action; still including being located the base of casing below, the casing is equipped with the mounting hole, the base is equipped with just to the screw hole of mounting hole, wear to be equipped with the bolt in the mounting hole, the bolt includes screw thread section and twisting head, screw thread section and screw hole threaded connection, it is located one side that the mounting hole deviates from the screw hole to twist the head, the casing is equipped with sealed pad one towards the base, the base is equipped with sealed pad two towards the casing.

By adopting the technical scheme, before the drainer is installed, the bolt is separated from the base, and the support is separated from the shell. The shell is inserted above the water draining hole of the water tank, the base is inserted below the water draining hole of the water tank, then the bolt is taken, the threaded section penetrates through the mounting hole, and the screw head is rotated by the screwdriver to enable the threaded section to be in threaded connection with the threaded hole. Along with the further wrong income of bolt, the distance of base, casing is constantly close to, and until base, casing pass through sealed pad two, sealed pad one and press from both sides the diapire of tight basin, at this in-process, base, casing need not to rotate, and sealed pad one, sealed pad two do not produce relative rotation with the contact department of foreign object, then can reduce sealed pad one, sealed pad two and produce the probability of wearing and tearing or damaging.

Optionally, the aperture of the mounting hole is larger than the outer diameter of the threaded section, and the threaded section can swing by an angle in the mounting hole.

Through adopting above-mentioned technical scheme, the bolt is at the tightening in-process, even two upper and lower walls of basin are non-parallel, the bolt can be at mounting hole department self-adaptation turned angle, makes sealed pad one, sealed pad two by reliable compressing tightly to guarantee sealed.

Optionally, the housing is provided with a caulking groove for embedding the screw head, and the mounting hole is located at the bottom of the caulking groove; the diameter of caulking groove is from notch to tank bottom direction convergent, makes the cell wall of caulking groove be the toper, it is equipped with the conical surface that is used for butt caulking groove cell wall to twist the head.

By adopting the technical scheme, when the angle of the bolt and the shell is inclined, the contact position of the screwing head and the groove wall of the caulking groove is better in stress, and the surface of the groove wall of the screwing head or the caulking groove is not easy to crush.

Optionally, the bracket is provided with at least three support rods along the circumferential direction, and water filtering holes are formed between the support rods; the support is connected with the shell in a sliding mode along the axial direction of the shell, and the support can be separated from the shell through upward sliding.

Through adopting above-mentioned technical scheme, water is when arranging under the water drainage, through the effect that blocks of bracing piece, and drainage hole department can play the filtering action to water, prevents objects such as ring and arranges down to the sewer. When the object blocked by the supporting rod needs to be taken out, the support is pulled out through the upper pull cover plate.

Optionally, the housing includes at least two connecting portions, the connecting portions are distributed along a circumferential direction of the housing, and a water passage is formed between adjacent connecting portions; the connecting part and the supporting rod are located at the same position in the length direction of the drainer, the connecting part is close to the supporting rod, and the supporting rod is in sliding contact with the connecting part when the support rotates.

Through adopting above-mentioned technical scheme, when drainage hole department is blocked by paper class rubbish, the rotatable apron of user, the apron drives the support and rotates, makes to produce relative rotation between bracing piece and connecting portion, and bracing piece, connecting portion play the effect of cutting off to the rubbish that blocks, are convenient for accomplish the mediation of drainage hole department.

Optionally, the casing is provided with a mounting groove for embedding the lower end of the support, the mounting groove is located above the caulking groove and communicated with the notch of the caulking groove, and the support seals the notch of the caulking groove.

Through adopting above-mentioned technical scheme, the support lower extreme is installed behind the mounting groove, and the support seals the notch of caulking groove, prevents that the water contact from twisting the head to prevent to twist overhead rubbish and incrustation scale of accumulating. When the drainer is dismounted, the screwing groove on the screwing head can be kept clean, so that the screwdriver can be conveniently inserted and screwed.

Optionally, a twisting groove is formed in the twisting head, a twisting strip is fixed to the bottom of the support, and the twisting strip is embedded into the twisting groove.

Through adopting above-mentioned technical scheme, after screwing the strip embedding and twisting the groove, when the support rotated to the direction of screwing up the bolt, it ordered about to twist the head and rotated and screwed up the bolt to twist the strip, and the user can accomplish the screwing up of bolt through rotating the apron like this, and the screwing up of bolt need not with the help of the screwdriver, has made things convenient for the installation of bolt.

Optionally, the twisting strip comprises a vertical surface and a guide surface, the vertical surface is located on the side wall, the guide surface is located at the bottom, the vertical surface and the guide surface are arranged along the circumferential direction of the support, the twisting head can be driven to rotate to screw the bolt when the twisting strip is pressed on the wall of the twisting groove through the vertical surface, the guide surface is an inclined surface, and the twisting strip can be driven to separate from the twisting groove when the twisting strip is pressed on the wall of the twisting groove through the guide surface.

By adopting the technical scheme, after the screwing strip is embedded into the screwing groove, when the support rotates in the direction of screwing the bolt, the screwing strip is tightly pressed on the wall of the screwing groove through the vertical surface, and the screwing head is driven to rotate to screw the bolt. When the support rotated to the direction of unscrewing the bolt, twisted the strip and compressed tightly in twisting the groove cell wall through the spigot surface, through the guiding action of spigot surface, twisted the strip and can upwards remove and break away from and twist the groove, and can not unscrew and unscrew the head, like this in daily use, avoid twisting the strip and unscrew the condition appearance of bolt.

Optionally, the top surface of the cover plate is provided with a plurality of guide grooves along the circumferential direction, the bottom walls of the guide grooves are inclined to the horizontal plane, the inclined direction of the guide grooves is that the cover plate is driven to rotate in the direction of screwing the bolt when the cover plate is subjected to downward pressure in the vertical direction, and adjacent guide grooves are connected through edges.

Through adopting above-mentioned technical scheme, when pressing the opening and close of apron switching hydrophone down, the finger pushes down in the tank bottom of guiding groove, through the inclined plane guide effect of guiding groove, orders about the apron to the direction rotation of screwing up the bolt. The situation that the cover plate is rotated in the direction of unscrewing the bolt is not easy to occur due to the arrangement, and all threaded connection positions of the water drainage device are not easy to loosen.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the process of installing the drainer, the abrasion or damage of the first sealing gasket and the second sealing gasket can be avoided;

2. when the upper wall and the lower wall of the water tank are not parallel, the first sealing gasket and the second sealing gasket can be reliably pressed to ensure sealing;

3. the supporting rod and the connecting part can rotate relatively, and the garbage blocking device has a cutting effect on the blocked garbage.

Drawings

Fig. 1 is a perspective view of a wear-reducing drainer according to a first embodiment of the present application.

FIG. 2 is a sectional view of the first embodiment.

Fig. 3 is an exploded view of the first embodiment.

Fig. 4 is an enlarged view of fig. 2 at a.

Fig. 5 is a partial view of the second embodiment, mainly highlighting the position of the twisted strips.

Fig. 6 is an enlarged view of fig. 5 at B.

Fig. 7 is a perspective view of the cover plate of the second embodiment.

Description of reference numerals: 1. a housing; 2. a base; 11. a water drain; 12. a water inlet; 13. a flange; 14. a first sealing gasket; 21. a second sealing gasket; 15. a housing main body; 16. a connecting portion; 17. a support portion; 161. a water inlet; 3. a support; 171. mounting grooves; 172. caulking grooves; 173. mounting holes; 31. a support bar; 32. water filtering holes; 33. a cutting edge; 4. a bounce spool; 5. a cover plate; 22. a connecting frame; 23. a threaded hole; 6. a bolt; 61. a threaded segment; 62. screwing the head; 621. screwing the groove; 622. a conical surface; 34. twisting the strips; 341. a vertical plane; 342. a guide surface; 51. a guide groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The first embodiment is as follows:

the embodiment I of the application discloses a drainer capable of reducing abrasion. Referring to fig. 1 and 2, the wear-reducing drainer includes a housing 1 located above and a base 2 located below, where the housing 1 and the base 2 are both cylindrical, hollow inside and have two ends penetrating through. A water drainage channel 11 is arranged in the shell 1 along the vertical direction, and a water inlet 12 communicated with the water drainage channel 11 is arranged at the top of the shell 1.

Referring to fig. 2 and 3, a flange 13 is integrally fixed on the top of the housing 1, the flange 13 protrudes out of the side wall of the housing 1 along the circumferential direction of the housing 1, a first gasket 14 made of foam plastic is arranged on one side of the flange 13 facing the base 2, and a second gasket 21 made of rubber or resin is arranged on the top surface of the base 2 facing the housing 1. When the drainer is installed, the lower part of the shell 1 penetrates through a drainage hole of the water tank, the flange 13 is positioned in the water tank, and the first sealing gasket 14 and the second sealing gasket 21 are used for respectively pressing the upper tank wall and the lower tank wall of the water tank, so that the installation of the drainer and the water tank is realized, and the sealing is realized.

The shell 1 comprises a shell main body 15, a connecting part 16 and a supporting part 17 which are fixedly connected, wherein the flange 13 is positioned at the top of the shell main body 15, the connecting part 16 is positioned between the shell main body 15 and the supporting part 17, and the connecting part 16 connects and fixes the shell main body 15 and the supporting part 17. Three connecting portions 16 are symmetrically provided in the circumferential direction of the housing 1, and a water passage port 161 is formed between adjacent connecting portions 16. The housing main body 15 and the support portion 17 are both cylindrical, the axes of the housing main body 15 and the support portion 17 are overlapped, the outer diameter of the support portion 17 is smaller than the inner diameter of the housing main body 15, and the radially outer space of the support portion 17 is used for water passage.

The inner wall of the shell 1 is provided with a support 3, the outer side wall of the support 3 is in sliding contact with the inner wall of the shell main body 15, the top surface of the supporting part 17 is provided with a mounting groove 171, the lower end of the support 3 is inserted into the mounting groove 171, the shell 1 supports the support 3 through the supporting part 17, and the support 3 can be separated from the shell 1 through upward sliding. The support 3 is provided with three support rods 31 along the circumferential direction, the three support rods 31 are uniformly distributed along the circumferential direction of the support 3, and water filtering holes 32 are formed between the adjacent support rods 31; the support rod 31 and the connecting part 16 are located at the same position in the length direction of the drainer, the connecting part 16 abuts against the support rod 31, the outer wall of the support rod 31 is in sliding contact with the inner wall of the connecting part 16 when the bracket 3 rotates, the edge of the outer wall of the support rod 31 and the edge of the inner wall of the connecting part 16 are combined to form a cutting edge 33, and the cutting edge 33 is used for cutting garbage clamped at the drainage hole 32.

The support 3 is connected with a bounce valve core 4, the lower end of the bounce valve core 4 is fixed on the support 3, and the upper end of the bounce valve core 4 is fixed with a cover plate 5. A user presses the top surface of the cover plate 5 to switch the state of the bounce valve core 4, and the bounce valve core 4 can move to lift the cover plate 5, so that the water inlet 12 is opened and closed. After the cover plate 5 is lifted, the water inlet 12 is opened, and water in the water tank can enter the water drainage channel 11 through the water inlet 12 and is drained downwards; the cover plate 5 closes the water inlet 12 after being lowered, and the cover plate 5 is sealed with the drainage channel 11 through a sealing ring arranged on the side wall.

Referring to fig. 3 and 4, the support portion 17 is further provided with a caulking groove 172, the caulking groove 172 is located below the mounting groove 171 and communicates with the mounting groove 171, the notch of the caulking groove 172 faces upward, and the groove bottom edge of the mounting groove 171 is the notch edge of the caulking groove 172. The diameter of the caulking groove 172 is tapered from the notch toward the bottom of the groove, and the groove wall of the caulking groove 172 is tapered. The bottom of the insertion groove 172 is provided with a mounting hole 173, the mounting hole 173 penetrates through the supporting portion 17, and the mounting hole 173 is located on the central axis of the housing 1.

Referring to fig. 2 and 3, the base 2 is fixed with a connecting frame 22, the connecting frame 22 connects and fixes two opposite inner walls of the base 2 along the radial direction of the base 2, and the middle part of the connecting frame 22 is provided with a threaded hole 23 facing the mounting hole 173. Wear to be equipped with bolt 6 in the mounting hole 173, bolt 6 is stainless steel material, and bolt 6 includes integrative fixed screw thread section 61 and screw head 62, screw thread section 61 and screw hole 23 threaded connection, and screw head 62 is located one side that mounting hole 173 deviates from screw hole 23, and screw head 62 can't pass mounting hole 173.

Referring to fig. 4, the screw head 62 is provided with a screw groove 621 on the surface facing away from the screw thread section 61, and the screw groove 621 is used for inserting and driving a screw driver. The surface of the screw head 62 facing the threaded section 61 is a tapered surface 622, and the tapered surface 622 is used for abutting against the groove wall of the tapered caulking groove 172. The diameter of the mounting hole 173 is larger than the outer diameter of the threaded section 61, and the threaded section 61 can swing within the mounting hole 173 by an angle. After the lower end of the bracket 3 is installed in the installation groove 171, the bracket 3 closes the notch of the caulking groove 172, preventing water from contacting the screw head 62, thereby preventing garbage and scale from being accumulated on the screw head 62.

The implementation principle of the drainer capable of reducing abrasion in the embodiment of the application is as follows: before the drainer is installed, the bolt 6 is separated from the base 2, the bracket 3 is separated from the shell 1, and the bracket 3, the bounce valve core 4 and the cover plate 5 are assembled in advance. The housing 1 is inserted above the drain hole of the water tank, the base 2 is inserted below the drain hole of the water tank, the bolt 6 is taken out, the threaded section 61 passes through the mounting hole 173, and the screw head 62 is rotated by a screwdriver to enable the threaded section 61 to be in threaded connection with the threaded hole 23.

With the further screwing of the bolt 6, the distance between the base 2 and the shell 1 is continuously close until the base 2 and the shell 1 clamp the bottom wall of the water tank through the second sealing gasket 21 and the first sealing gasket 14, in the process, the base 2 and the shell 1 do not need to rotate, the contact positions of the first sealing gasket 14 and the second sealing gasket 21 and foreign objects do not rotate relatively, and the abrasion or damage of the first sealing gasket 14 and the second sealing gasket 21 can be avoided. And finally, inserting a combination of the bracket 3, the bounce valve core 4 and the cover plate 5 into the shell 1 to finish the installation of the drainer.

In the process of screwing the bolt 6, even if the upper wall and the lower wall of the water tank are not parallel, the bolt 6 can self-adapt to the rotation angle at the mounting hole 173, so that the first sealing gasket 14 and the second sealing gasket 21 are reliably pressed, and sealing is ensured; the contact position of the screw head 62 and the groove wall of the caulking groove 172 is better stressed, and the groove wall surface of the screw head 62 or the caulking groove 172 is not easy to crush.

When water is arranged under the water drainage channel 11, the water filtering holes 32 can filter the water through the blocking effect of the supporting rods 31, and objects such as rings, large garbage and the like are prevented from being arranged under the sewer. When the object blocked by the supporting rod 31 needs to be taken out, the bracket 3 can be pulled out by pulling the cover plate 5 upwards. When the water filtering hole 32 is blocked by the paper garbage, the user can rotate the cover plate 5, the cover plate 5 drives the bracket 3 to rotate, so that the support rod 31 and the connecting part 16 rotate relatively, the cutting edge 33 has a cutting effect on the blocked garbage, and the dredging of the water filtering hole 32 is convenient to complete.

Example two:

the second embodiment of the application discloses a drainer capable of reducing abrasion. Referring to fig. 5 and 6, the difference between the second embodiment and the first embodiment is that: the bottom of the bracket 3 is fixed with the twisting strip 34, the twisting strip 34 extends along the radial direction of the bracket 3, and after the bottom end of the bracket 3 is completely inserted into the mounting groove 171, the twisting strip 34 can be just embedded into the twisting groove 621. The tightening strip 34 includes a vertical surface 341 on the side wall and a guide surface 342 on the bottom, the guide surface 342 is an inclined surface, an included angle between the vertical surface 341 and the guide surface 342 is an acute angle, the vertical surface 341 and the guide surface 342 are arranged along the circumferential direction of the bracket 3, and the vertical surface 341 and the guide surface 342 are symmetrically distributed around the circumferential direction of the bracket 3.

The positions of the vertical surface 341 and the guide surface 342 are set as follows: after the screwing strip 34 is embedded into the screwing groove 621, when the support 3 rotates towards the direction of screwing the bolt 6, the screwing strip 34 is tightly pressed on the wall of the screwing groove 621 through the vertical surface 341, and the screwing head 62 is driven to rotate the screwing bolt 6, so that the user can complete screwing the bolt 6 by rotating the cover plate 5, the bolt 6 is screwed without a screwdriver, and the bolt 6 is convenient to install. When the bracket 3 rotates towards the direction of unscrewing the bolt 6, the screwing strip 34 is pressed against the groove wall of the screwing groove 621 through the guide surface 342, and the screwing strip 34 can move upwards to be separated from the screwing groove 621 without unscrewing the screwing head 62 through the guide effect of the guide surface 342, so that the situation that the screwing strip 34 unscrews the bolt 6 is avoided in the daily use process.

Referring to fig. 7, the top surface of the cover 5 is provided with three guide grooves 51 in the circumferential direction, the three guide grooves 51 equally dividing the top surface of the cover 5 into three parts, and the edges of the three guide grooves 51 intersect at the center of the cover 5. The groove bottom walls of the guide grooves 51 are inclined to the horizontal plane, adjacent guide grooves 51 are connected by edges, and the three guide grooves 51 are centrosymmetric with respect to the axis of the cover 5. The inclination direction of the guide groove 51 is set as follows: when the groove bottom of the guide groove 51 receives a downward pressure from the vertical direction of the finger, the cover plate 5 is driven to rotate in the direction of tightening the bolt 6 by the slope guiding action of the guide groove 51. Due to the arrangement, when a person presses the cover plate 5, the cover plate 5 is not easy to rotate in the direction of unscrewing the bolt 6, and the threaded connection positions of the water discharging device are not easy to loosen.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A drainer capable of reducing abrasion comprises a shell (1), wherein a water drainage channel (11) and a bouncing valve core (4) are arranged in the shell (1), a water inlet (12) communicated with the water drainage channel (11) is formed in the top of the shell (1), a support (3) is arranged on the inner wall of the shell (1), the lower end of the bouncing valve core (4) is fixed on the support (3), a cover plate (5) is fixed at the upper end of the bouncing valve core (4), and the bouncing valve core (4) can move the cover plate (5) to open and close the water inlet (12) through action; the method is characterized in that: the novel sealing device is characterized by further comprising a base (2) located below the shell (1), wherein the shell (1) is provided with a mounting hole (173), the base (2) is provided with a threaded hole (23) which is just opposite to the mounting hole (173), a bolt (6) penetrates through the mounting hole (173), the bolt (6) comprises a threaded section (61) and a screwing head (62), the threaded section (61) is in threaded connection with the threaded hole (23), the screwing head (62) is located on one side, away from the threaded hole (23), of the mounting hole (173), the shell (1) is provided with a first sealing gasket (14) facing the base (2), and the base (2) is provided with a second sealing gasket (21) facing the shell (1);

at least three support rods (31) are arranged on the support (3) along the circumferential direction, and water filtering holes (32) are formed among the support rods (31); the support (3) is connected with the shell (1) in a sliding mode along the axial direction of the shell (1), and the support (3) can be separated from the shell (1) through upward sliding.

2. The reduced wear downcomer of claim 1, characterized by: the aperture of the mounting hole (173) is larger than the outer diameter of the threaded section (61), and the threaded section (61) can swing within the mounting hole (173) by an angle.

3. A reduced wear downcomer according to claim 2 and wherein: the shell (1) is provided with a caulking groove (172) for embedding the screwing head (62), and the mounting hole (173) is positioned at the bottom of the caulking groove (172); the diameter of the caulking groove (172) is gradually reduced from the groove opening to the groove bottom direction, so that the groove wall of the caulking groove (172) is conical, and the screwing head (62) is provided with a conical surface (622) used for being abutted to the groove wall of the caulking groove (172).

4. The reduced wear downcomer of claim 1, characterized by: the shell (1) comprises at least two connecting parts (16), the connecting parts (16) are distributed along the circumferential direction of the shell (1), and a water passing port (161) is formed between the adjacent connecting parts (16); the connecting part (16) and the supporting rod (31) are located at the same position in the length direction of the drainer, the connecting part (16) is close to the supporting rod (31), and the supporting rod (31) is in sliding contact with the connecting part (16) when the bracket (3) rotates.

5. The reduced wear downcomer of claim 1, characterized by: casing (1) is equipped with mounting groove (171) that supplies support (3) lower extreme embedding, mounting groove (171) are located caulking groove (172) top and with the notch intercommunication of caulking groove (172), support (3) are sealed the notch of caulking groove (172).

6. The reduced wear downcomer of claim 1, characterized by: be equipped with on twisting head (62) and twist groove (621), support (3) bottom is fixed with twists strip (34), it twists in groove (621) to twist strip (34) embedding.

7. The reduced wear downcomer of claim 6, characterized by: the screwing strip (34) comprises a vertical surface (341) located on the side wall and a guide surface (342) located at the bottom, the vertical surface (341) and the guide surface (342) are arranged along the circumferential direction of the support (3), the screwing strip (34) can drive the screwing head (62) to rotate to screw the bolt (6) when being pressed on the groove wall of the screwing groove (621) through the vertical surface (341), the guide surface (342) is an inclined surface, and the screwing strip (34) can be driven to separate from the screwing groove (621) when being pressed on the groove wall of the screwing groove (621) through the guide surface (342).

8. The reduced wear downcomer of claim 7, characterized by: the cover plate is characterized in that a plurality of guide grooves (51) are formed in the top surface of the cover plate (5) along the circumferential direction, the bottom walls of the guide grooves (51) are inclined to the horizontal plane, the inclined direction of the guide grooves (51) is that the cover plate (5) is driven to rotate in the direction of screwing the bolt (6) when the vertical direction is subjected to downward pressure, and adjacent guide grooves (51) are connected through edges.