CN113863439A

CN113863439A - Secondary water supply tank with aeration device

Info

Publication number: CN113863439A
Application number: CN202111213973.XA
Authority: CN
Inventors: 李光辉
Original assignee: Individual
Current assignee: Hainan Tianfuquan Energy Conservation And Environmental Protection Technology Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2021-12-31
Anticipated expiration: 2041-10-19
Also published as: CN113863439B

Abstract

The invention discloses a secondary water supply tank with an aeration device, and relates to the technical field of secondary water supply. The secondary water supply water tank with the aeration device comprises a water tank body and an aeration device body, wherein the aeration device body is fixed on the right side of the water tank body, and the top and the front side of the water tank body are respectively provided with a water inlet end and a water outlet end. This secondary water supply tank with aeration equipment, can carry out the oxygen suppliment operation to the inside water of water tank main part through setting up aeration equipment main part and exhaust apparatus, exhaust apparatus can produce a large amount of bubbles at the oxygen suppliment in-process, the light deflector can lead to the bubble of the side around the partial water tank main part inner wall, make this part bubble rise along the side around the water tank main part inner wall, the bubble can reduce the stability of water tank main part inner wall dust with the contact of water tank main part inner wall, and then can avoid the dust to adhere to the inner wall in water tank main part, with the cleaning strength who reduces follow-up water tank main part.

Description

Secondary water supply tank with aeration device

Technical Field

The invention relates to the technical field of secondary water supply, in particular to a secondary water supply tank with an aeration device.

Background

The secondary water supply is a form that a unit or an individual stores and pressurizes urban public water supply or self-built facility water supply, and supplies water to users or self-use through a pipeline. The secondary water supply is mainly established for compensating the pressure shortage of the municipal water supply pipeline and ensuring the water consumption of high-rise people living in dwellings.

The existing secondary water supply needs to store water by using a water tank, and the water in the water tank is pressurized and output by devices such as a water pump and the like so as to improve the water pressure of output. Because aeration equipment constantly inputs the air to in the water tank, though can set up filter equipment and handle the dust in the air, along with the live time increase of filter screen, its filter effect reduces, still can contain a small amount of dust in the air of input water tank, and this part dust can the adhesion at the inner wall of water tank after getting into the water tank, has increased the cleaning strength of follow-up water tank.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a secondary water supply tank with an aeration device, which solves the problems in the prior art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a secondary water supply water tank with aeration equipment, includes water tank main part and aeration equipment main part, the right side at water tank main part is fixed to the aeration equipment main part, water tank main part top and front side are equipped with into water end and play water end respectively, aeration equipment main part top is equipped with two admission line and a pipeline of giving vent to anger, the pipeline of giving vent to anger runs through water tank main part top and communicates with placing the inside exhaust apparatus inside water tank main part, water tank main part inner wall is articulated with light deflector bottom, light deflector top center department is fixed with showy piece through the connecting rod, it is hollow setting to float the inside piece.

Preferably, exhaust apparatus includes house steward and branch pipe, house steward center department with give vent to anger the pipeline fixed and with give vent to anger the pipeline intercommunication, divide the pipe fixed with house steward and with house steward inside intercommunication, divide the pipe top to be equipped with a plurality of ports of giving vent to anger.

Preferably, the light guide plate is arranged in an inclined manner, the front side and the rear side of the two ends of the light guide plate are respectively provided with a limiting strip, the limiting strips are fixed inside the water tank main body, one limiting strip is in contact with the light guide plate, and a gap is formed between the other limiting strip and the light guide plate.

Preferably, the bottom of the inner wall of the floating block is fixed with a supporting block, the top of the supporting block is an arc-shaped concave surface, the concave surface at the top of the supporting block is in contact with the counterweight iron column, and gaps are formed between two ends of the counterweight iron column and the inner wall of the floating block.

Preferably, the bottom of the counterweight iron column is provided with a groove, the top of the supporting block is fixed with a limiting block, the limiting block is positioned in the groove, and the positions of the top of the inner wall of the groove, which are positioned at two sides of the limiting block, are fixed with driving hemispherical blocks.

Preferably, the inner wall of the opening of the air inlet pipeline is fixed with a filter screen, the horizontal distance between the bottom of the filter screen and the central point of the main body of the aeration device is smaller than the horizontal distance between the top of the filter screen and the central point of the main body of the aeration device, the filter screen is positioned on one side inside the air inlet pipeline and contacts with a swing plate, the top of the swing plate is hinged with the inner wall of the air inlet pipeline, and a cylindrical bulge is embedded at the joint of the swing plate and the filter screen.

Preferably, one side of the oscillating plate, which is far away from the filter screen, is in sliding connection with one side of the movable plate, the other side of the movable plate is fixedly provided with a magnetic block, the top of the magnetic block is fixedly provided with a pushing strip, and the pushing strip is arranged at a part between the top of the oscillating plate and the top of the inner wall of the air inlet pipeline.

Preferably, a buffering elastic sheet is fixed on one side, far away from the movable plate, of the magnetic block, the buffering elastic sheet protrudes towards one side, far away from the magnetic block, a rubber block is fixed at the center of the protruding side of the buffering elastic sheet, a notch is formed in the top of the inner wall of the air inlet pipeline, and the notch is located in a rotating area of the rubber block.

(III) advantageous effects

The invention provides a secondary water supply tank with an aeration device. The method has the following beneficial effects:

(1) this secondary water supply tank with aeration equipment, can carry out the oxygen suppliment operation to the inside water of water tank main part through setting up aeration equipment main part and exhaust apparatus, exhaust apparatus can produce a large amount of bubbles at the oxygen suppliment in-process, the light deflector can lead to the bubble of the side around the partial water tank main part inner wall, make this part bubble rise along the side around the water tank main part inner wall, the bubble can reduce the stability of water tank main part inner wall dust with the contact of water tank main part inner wall, and then can avoid the dust to adhere to the inner wall at water tank main part, with the clearance intensity that reduces follow-up water tank main part, it can utilize the fluctuation of the oxygen suppliment in-process surface of water to make the light deflector to swing to set up the cursory piece simultaneously, can improve the direction scope of light deflector to the bubble.

(2) This secondary water supply tank with aeration equipment can carry on spacingly to the rotation range of light deflector through setting up spacing, leads to when not having water in preventing the water tank main part to float the piece and rotate to contact bottom with water tank main part inner wall to improve light deflector, connecting rod and float the stability of piece in water tank main part inside.

(3) This secondary water supply tank with aeration equipment can utilize the inertia of floating block swing in-process to rock through setting up the counter weight iron prop, and the counter weight iron prop removes the in-process at the supporting shoe top and can clash with floating block inner wall, and the produced vibration of this striking can be transmitted to the light deflector through floating block and connecting rod on, prevents that partial bubble from attaching to on the light deflector and unable normal break away from to the oxygen suppliment effect has been ensured.

(4) This secondary water supply tank with aeration equipment can remove the in-process through setting up the drive hemisphere piece and collide with the stopper at the counter weight iron prop, and under this collision, the counter weight iron prop can produce certain bounce effect, and the counter weight iron prop bounces and falls the in-process and can produce vertical striking to the supporting shoe to can strengthen the vibration effect that the counter weight iron prop removed the in-process and produces.

(5) This secondary water supply tank with aeration equipment, can filter the air through the admission line through setting up the filter screen, and then reduce the dust volume in the air that gets into in the aeration equipment main part, it can swing when the aeration equipment main part is opened to set up the swinging board, the swinging board can reset and cylindric arch can strike the filter screen when the aeration equipment main part is closed, the kinetic energy of this striking can lead to absorbent dust on the filter screen to drop, the swinging board also can play the inclosed effect of laminating to the filter screen simultaneously, prevent that external air from leading to the filter screen surface to pile up the dust in getting into the admission line when the aeration equipment main part does not use, thereby reduce the cleaning frequency of filter screen.

(6) This secondary water supply tank with aeration equipment can follow the counter weight iron prop through setting up the magnetic path and remove, promotes the strip this moment and can carry out reciprocating swing under the effect of magnetic path to continuous strikes the filter screen, moves down with the dust that makes its surperficial in-process of filter screen filterable, reduces the attached quantity of its surperficial dust in the filter screen adsorption process.

(7) This secondary water supply tank with aeration equipment can play the buffering effect to the rotation of swinging plate through setting up the buffering shell fragment, and rubber piece and buffering shell fragment cooperation can reduce swinging plate rotation in-process and the produced sound of admission line inner wall striking, also can avoid the direct and admission line inner wall striking of magnetic path to lead to the magnetic path magnetism to weaken simultaneously.

Drawings

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

FIG. 2 is a partial cross-sectional view of the body of the present invention;

FIG. 3 is a left side view of the main body of the aeration apparatus according to the present invention;

FIG. 4 is a schematic view of a light guide plate according to the present invention;

FIG. 5 is a partial cross-sectional view of the flotation block of the present invention;

FIG. 6 is a side sectional view of a support block according to the present invention;

FIG. 7 is a partial cross-sectional view of an air inlet duct according to the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 7 according to the present invention.

In the figure: 1. a water tank main body; 11. a water inlet end; 12. a water outlet end; 2. an aeration apparatus main body; 21. an air intake duct; 211. a filter screen; 212. a swing plate; 2121. a cylindrical protrusion; 213. a movable plate; 214. a magnetic block; 2141. a buffering elastic sheet; 2142. a rubber block; 215. a push bar; 22. an air outlet pipe; 3. an exhaust device; 31. a header pipe; 32. pipe distribution; 321. an air outlet port; 4. a lightweight guide plate; 41. a connecting rod; 42. a floating block; 421. a support block; 4211. a limiting block; 422. a counterweight iron column; 4221. a groove; 4222. driving the hemispherical block; 43. and (5) a limiting strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: the utility model provides a secondary water supply tank with aeration equipment, including water tank main part 1 and aeration equipment main part 2, aeration equipment main part 2 is fixed on water tank main part 1's right side, water tank main part 1 top and front side are equipped with into water end 11 and play water end 12 respectively, 2 tops of aeration equipment main part are equipped with two admission line 21 and an air outlet pipe way 22, air outlet pipe way 22 runs through water tank main part 1 top and communicates with placing in the inside exhaust apparatus 3 of water tank main part 1 inside, water tank main part 1 inner wall is articulated with 4 bottoms of light deflector, 4 top centers of light deflector are located to be fixed with showy piece 42 through connecting rod 41, it is hollow setting to float the inside of piece 42. Can carry out the oxygen suppliment operation to the water of water tank main part 1 inside through setting up aeration equipment main part 2 and exhaust apparatus 3, exhaust apparatus 3 can produce a large amount of bubbles at the oxygen suppliment in-process, light deflector 4 can lead to the bubble of the side around the skew water tank main part 1 inner wall, make this part bubble rise along the side around water tank main part 1 inner wall, the bubble can reduce the stability of 1 inner wall dust of water tank main part with the contact of 1 inner wall of water tank main part, and then can avoid the dust to adhere to the inner wall at water tank main part 1, with the clearance intensity that reduces follow-up water tank main part 1, it can utilize the fluctuation of the oxygen suppliment in-process surface of water to make light deflector 4 swing to set up floating block 42 simultaneously, can improve the guide range of light deflector 4 to the bubble.

Preferably, in the present embodiment, the exhaust device 3 includes a main pipe 31 and branch pipes 32, the main pipe 31 is fixed to the outlet pipe 22 at the center and is communicated with the outlet pipe 22, the branch pipes 32 are fixed to the main pipe 31 and are communicated with the inside of the main pipe 31, and a plurality of outlet ports 321 are disposed at the top of the branch pipes 32.

Preferably, in this embodiment, the light guide plate 4 is disposed in an inclined manner, and the front and rear sides of the two ends of the light guide plate 4 are both provided with a limiting strip 43, the limiting strips 43 are fixed inside the water tank main body 1, one limiting strip 43 is in contact with the light guide plate 4, and a gap is provided between the other limiting strip 43 and the light guide plate 4. Can carry on spacingly to the rotation range of light deflector 4 through setting up spacing 43, prevent to lead to floating block 42 to rotate to contacting with water tank main body 1 inner wall bottom in the time of not having water in water tank main body 1 to improve light deflector 4, connecting rod 41 and floating block 42 in the inside stability of water tank main body 1.

Preferably, in this embodiment, a supporting block 421 is fixed at the bottom of the inner wall of the floating block 42, the top of the supporting block 421 is an arc-shaped concave surface, the concave surface at the top of the supporting block 421 contacts with the counterweight iron column 422, and gaps are provided between both ends of the counterweight iron column 422 and the inner wall of the floating block 42. Can utilize the inertia of floating block 42 swing in-process to rock through setting up counter weight iron column 422, counter weight iron column 422 removes the in-process at supporting shoe 421 top and can strike with floating block 42 inner wall, and the produced vibration of this striking can be transmitted to light deflector 4 through floating block 42 and connecting rod 41 on, prevents that partial bubble from attaching to on light deflector 4 and unable normal break away from to the oxygen suppliment effect has been ensured.

Preferably, in this embodiment, a groove 4221 is formed in the bottom of the counterweight iron column 422, a limit block 4211 is fixed at the top of the support block 421, the limit block 4211 is located inside the groove 4221, and driving hemispherical blocks 4222 are fixed at positions on the top of the inner wall of the groove 4221, which are located on two sides of the limit block 4211. Can move the in-process through setting up drive hemisphere piece 4222 and collide with stopper 4211 at counter weight iron pillar 422, under this collision, counter weight iron pillar 422 can produce certain effect of bounceing, and counter weight iron pillar 422 bounces and falls the in-process and can produce vertical striking to supporting shoe 421 to can strengthen the vibration effect that counter weight iron pillar 422 removed the in-process and produce.

Preferably, in this embodiment, a filter screen 211 is fixed on the inner wall of the opening of the air inlet duct 21, the horizontal distance between the bottom of the filter screen 211 and the central point of the aeration apparatus main body 2 is smaller than the horizontal distance between the top and the central point of the aeration apparatus main body 2, one side of the filter screen 211 located inside the air inlet duct 21 contacts with the swing plate 212, the top of the swing plate 212 is hinged to the inner wall of the air inlet duct 21, and a cylindrical protrusion 2121 is embedded at the connection position of the swing plate 212 and the filter screen 211. Can filter the air through air intake duct 21 through setting up filter screen 211, and then reduce the dust volume in the air that gets into aeration equipment main part 2, it can swing when aeration equipment main part 2 is opened to set up swing board 212, swing board 212 can reset and cylindric arch 2121 can strike filter screen 211 when aeration equipment main part 2 is closed, the kinetic energy of this striking can lead to absorbent dust to drop on the filter screen 211, swing board 212 also can play the inclosed effect of laminating to filter screen 211 simultaneously, prevent that external air from getting into when aeration equipment main part 2 does not use and leading to filter screen 211 surface to pile up the dust in 21, thereby reduce the cleaning frequency of filter screen 211.

Preferably, in the present embodiment, a side of the oscillating plate 212 far from the filter screen 211 is slidably connected to a side of the movable plate 213, the other side of the movable plate 213 is fixed with the magnetic block 214, a pushing bar 215 is fixed on a top of the magnetic block 214, and the pushing bar 215 is disposed between the top of the oscillating plate 212 and a top of an inner wall of the air intake duct 21. The magnetic block 214 is arranged to move along with the counterweight iron column 422, at this time, the pushing bar 215 can swing back and forth under the action of the magnetic block 214 and continuously knock the filter screen 211, so that dust on the surface of the filter screen 211 in the filtering process is promoted to move downwards, and the attachment amount of the dust on the surface of the filter screen 211 in the adsorption process is reduced.

Preferably, in the present embodiment, a buffering elastic sheet 2141 is fixed to a side of the magnetic block 214 away from the movable plate 213, the buffering elastic sheet 2141 protrudes to a side away from the magnetic block 214, a rubber block 2142 is fixed to a center of a protruding side of the buffering elastic sheet 2141, a notch is formed at a top of an inner wall of the air intake duct 21, and the notch is located in a rotation region of the rubber block 2142. The buffer elastic sheet 2141 can buffer the rotation of the swing plate 212, the rubber block 2142 and the buffer elastic sheet 2141 can reduce the sound generated by the impact of the swing plate 212 with the inner wall of the air inlet pipe 21 in the rotation process, and meanwhile, the magnetic block 214 can be prevented from being weakened due to the direct impact of the magnetic block 214 with the inner wall of the air inlet pipe 21.

The working principle is as follows: inputting water into the water inlet end 11 for storage, turning on the switch of the aeration device main body 2, allowing the aeration device main body 2 to enter air through the air inlet pipe 21, giving out air through the air outlet pipe 22, allowing air discharged from the air outlet pipe 22 to enter the main pipe 31 and the branch pipe 32, and discharging the air into the water tank main body 1 through the air outlet port 321, so as to realize oxygen supply effect, air bubbles discharged from the air outlet port 321 at the bottom of the light guide plate 4 contact with the lower surface of the light guide plate 4 and move towards the front and back sides of the inner wall of the water tank main body 1 under the action of the inclined surface of the light guide plate 4, the air bubbles rise along the front and back side surfaces of the inner wall of the water tank main body 1, dust with short attachment time at the front and back sides of the inner wall of the water tank main body 1 is pushed by the air bubbles to generate deviation and enter the water again, thereby preventing excessive dust from attaching to the inner wall of the water tank main body 1, and when the air bubbles move to the water surface, the water surface can generate fluctuation, the fluctuation can drive the floating block 42 to swing, the floating block 42 drives the light guide plate 4 to rotate in a reciprocating mode through the connecting rod 41, at the moment, the light guide plate 4 continuously swings between the two limiting strips 43, and the swing range of the light guide plate 4 to bubbles can be increased;

during the reciprocating movement of the floating block 42, the counterweight iron column 422 can move back and forth on the top of the supporting block 421, and the counterweight iron column 422 can collide with the inner wall of the floating block 42, and the vibration generated by the collision can be transmitted to the light guide plate 4 through the floating block 42 and the connecting rod 41, so that the bubbles adhered to the light guide plate 4 fall off; the driving semispherical block 4222 is driven to move in the process that the counterweight iron column 422 moves forwards and backwards, the driving semispherical block 4222 collides with the limiting block 4211, the driving semispherical block 4222 and the counterweight iron column 422 move in the vertical direction under the collision of the side cambered surfaces of the driving semispherical block 4222 and the limiting block 4211, and the counterweight iron column 422 can collide with the supporting block 421 downwards after being reset, so that vibration in different directions is generated in the process that the counterweight iron column 422 moves forwards and backwards, and the vibration effect is improved;

when the air inlet duct 21 is used for air inlet, the filter screen 211 can filter dust in the air, the filtered dust can be attached to one side of the filter screen 211, which is located outside the air inlet duct 21, in the air inlet process, the negative pressure state generated by the air inlet duct 21 can enable the swing plate 212 to rotate and to be in contact with the top of the inner wall of the air inlet duct 21, in the process that the swing plate 212 rotates to be in contact with the inner wall of the air inlet duct 21, the rubber block 2142 can collide with the notch in the top of the inner wall of the air inlet duct 21, the buffer elastic sheet 2141 can deform and generate a buffer effect, after the aeration device main body 2 is closed, the swing plate 212 resets again under the action of gravity, the cylindrical protrusion 2121 can collide with the filter screen 211, the kinetic energy of the collision can be transmitted to the dust on the air inlet duct 21, and part of the dust can be separated from the filter screen 211, so as to reduce the cleaning frequency of the filter screen 211; when the air inlet pipe 21 admits air, the swing board 212 contacts with air inlet pipe 21 inner wall top all the time, counter weight iron post 422 carries out the reciprocating motion in-process, magnetic force between counter weight iron post 422 and the magnetic path 214 can lead to magnetic path 214 and fly leaf 213 to produce corresponding removal, magnetic path 214 drives to promote strip 215 and remove and strike filter screen 211 this moment, because filter screen 211 is the slope form setting, so should strike the operation and can make the last adsorbed dust of filter screen 211 break away from for a short time, and under the effect of filter screen 211 direction and gravity, the dust can be partial to filter screen 211 bottom and remove, finally break away from filter screen 211, can reduce the adnexed dust volume on the filter screen 211.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a secondary water supply tank with aeration equipment, includes water tank main part (1) and aeration equipment main part (2), its characterized in that: the right side at water tank body (1) is fixed in aeration equipment main part (2), water tank body (1) top and front side are equipped with respectively and intake end (11) and play water end (12), aeration equipment main part (2) top is equipped with two admission lines (21) and one pipeline (22) of giving vent to anger, the pipeline (22) of giving vent to anger run through water tank body (1) top and with place at inside exhaust apparatus (3) inside water tank body (1) inside intercommunication, water tank body (1) inner wall is articulated bottom light deflector (4), light deflector (4) top center department is fixed with floating block (42) through connecting rod (41), floating block (42) inside is hollow setting.

2. The secondary water supply tank with aeration apparatus according to claim 1, wherein: exhaust apparatus (3) are including house steward (31) and branch pipe (32), house steward (31) center department with give vent to anger pipeline (22) fixed and with give vent to anger pipeline (22) intercommunication, divide pipe (32) fixed and with house steward (31) inside intercommunication with house steward (31), it is equipped with a plurality of ports (321) of giving vent to anger to divide pipe (32) top.

3. The secondary water supply tank with aeration apparatus according to claim 1, wherein: the water tank is characterized in that the light guide plate (4) is obliquely arranged, the front side and the rear side of the two ends of the light guide plate (4) are respectively provided with a limiting strip (43), the limiting strips (43) are fixed inside the water tank body (1), one limiting strip (43) is in contact with the light guide plate (4), and a gap is formed between the other limiting strip (43) and the light guide plate (4).

4. The secondary water supply tank with aeration apparatus according to claim 1, wherein: the floating block (42) is characterized in that a supporting block (421) is fixed at the bottom of the inner wall of the floating block (42), the top of the supporting block (421) is an arc-shaped concave surface, the concave surface at the top of the supporting block (421) is in contact with a counterweight iron column (422), and gaps are formed between two ends of the counterweight iron column (422) and the inner wall of the floating block (42).

5. The secondary water supply tank with aeration apparatus according to claim 4, wherein: the bottom of the counterweight iron column (422) is provided with a groove (4221), the top of the supporting block (421) is fixed with a limiting block (4211), the limiting block (4211) is located inside the groove (4221), and the positions, located on two sides of the limiting block (4211), of the top of the inner wall of the groove (4221) are fixed with driving hemispherical blocks (4222).

6. The secondary water supply tank with aeration apparatus according to claim 1, wherein: intake duct (21) opening part inner wall is fixed with filter screen (211), horizontal distance between filter screen (211) bottom and aeration equipment main part (2) central point is less than the horizontal distance between top and aeration equipment main part (2) central point, filter screen (211) are located inside one side and the contact of swing board (212) of intake duct (21), swing board (212) top is articulated with intake duct (21) inner wall, swing board (212) and filter screen (211) junction are inlayed and are had cylindric arch (2121).

7. The secondary water supply tank with aeration apparatus according to claim 6, wherein: one side, far away from the filter screen (211), of the oscillating plate (212) is connected with one side of the movable plate (213) in a sliding mode, a magnetic block (214) is fixed to the other side of the movable plate (213), a pushing strip (215) is fixed to the top of the magnetic block (214), and the pushing strip (215) is arranged between the top of the oscillating plate (212) and the top of the inner wall of the air inlet pipeline (21).

8. A secondary water supply tank with an aeration apparatus according to claim 7, characterized in that: the buffer elastic sheet (2141) is fixed on one side, away from the movable plate (213), of the magnetic block (214), the buffer elastic sheet (2141) protrudes towards one side, away from the magnetic block (214), the center of the protruding side of the buffer elastic sheet (2141) is fixed with the rubber block (2142), a notch is formed in the top of the inner wall of the air inlet pipeline (21), and the notch is located in the rotating area of the rubber block (2142).