CN215627290U

CN215627290U - Prefabricated pump station of integration glass steel for sewage treatment

Info

Publication number: CN215627290U
Application number: CN202122177038.4U
Authority: CN
Inventors: 袁家驹; 吴建华
Original assignee: Nanjing Hengbeite Frp Co ltd
Current assignee: Nanjing Hengbeite Frp Co ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-01-25
Anticipated expiration: 2031-09-09

Abstract

The utility model belongs to the field of glass fiber reinforced plastic prefabricated pump stations, in particular to an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment, which aims at solving the problems that the existing pump station is inconvenient to overhaul and cannot filter sewage thoroughly, if the sewage contains objects with larger particles, a pump body is easy to damage, and simultaneously, the sewage is not better disinfected, and malodorous gas is easy to volatilize, so that the environment of the pump station is severe, the utility model proposes the following scheme, which comprises a base, wherein the top of the base is fixedly connected with a glass fiber reinforced plastic shell, and a box door is arranged on the glass fiber reinforced plastic shell. Reduce the smell that sewage brought, improve the environment of pump station.

Description

Prefabricated pump station of integration glass steel for sewage treatment

Technical Field

The utility model relates to the technical field of glass fiber reinforced plastic prefabricated pump stations, in particular to an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment.

Background

With the continuous expansion and development of urbanization, the integrated pump station used as a new integrated pump station of water treatment equipment has higher and higher functional requirements, and the demand of the pump station with large diameter and large drainage is increased, and the integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment is one of the pump stations.

Current pump station overhauls inconveniently, and filters thoroughly inadequately to sewage, if contain the great object of granule in the sewage, harms the pump body easily, does not carry out better disinfection treatment to sewage simultaneously, causes foul gas to volatilize easily, leads to the pump station environment abominable, so we propose a prefabricated pump station of integration glass steel for sewage treatment for solve the above-mentioned problem that proposes.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that the existing pump station in the prior art is inconvenient to overhaul and cannot filter sewage thoroughly, a pump body is easy to damage if the sewage contains objects with larger particles, and meanwhile, the pump station environment is severe because malodorous gas is easy to volatilize because the sewage is not disinfected better, so that the pump station environment is severe.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment comprises a base, wherein a glass fiber reinforced plastic shell is fixedly connected to the top of the base, a box door is arranged on the glass fiber reinforced plastic shell, a filter screen is clamped in the glass fiber reinforced plastic shell, a water inlet pipe is arranged on the left side of the glass fiber reinforced plastic shell, a power box is fixedly connected to the top of the glass fiber reinforced plastic shell, a power assembly is arranged in the power box, a stirring shaft is connected to the power assembly in a transmission mode, the bottom end of the stirring shaft extends into the glass fiber reinforced plastic shell and is rotatably connected with the inner wall of the bottom of the glass fiber reinforced plastic shell, a plurality of stirring rods are fixedly connected to the stirring shaft, a medicine feeding pipe is arranged at the top of the glass fiber reinforced plastic shell, a drain pipe is arranged at the bottom of the right side of the glass fiber reinforced plastic shell, a drain valve is arranged on the drain pipe, a baffle is fixedly connected to the inner wall of the left side of the glass fiber reinforced plastic shell, and the left side of the filter screen are in sliding connection with the right side of the baffle, the filter screen can filter the impurity in the sewage, prevents that impurity from causing the influence to the pump station, can make the reciprocating rotation of (mixing) shaft through power component, can stir sewage and disinfection medicine, makes the two can the intensive mixing, can purify the disinfection to sewage, reduces the smell that sewage brought, improves the environment of pump station.

Preferably, the power assembly comprises a driving motor, a half gear, a toothed plate, a connecting rod, a rack and a connecting gear, the rear side of the driving motor is fixedly connected with the rear wall of the power box, the half gear is fixedly sleeved at the front end of an output shaft of the driving motor, a supporting plate is slidably connected to the inner wall of the left side of the power box, the top of the supporting plate is fixedly connected with the bottom of the toothed plate, the half gear is meshed with the toothed plate, the bottom of the supporting plate is symmetrically and fixedly connected with two first springs, the bottom ends of the two first springs are fixedly connected with the inner wall of the bottom of the power box, the top end of the connecting rod is rotatably connected with the right side of the toothed plate, the bottom end of the connecting rod is rotatably connected with the top of the rack, the top end of the stirring shaft extends into the power box, the connecting gear is fixedly sleeved at the top end of the stirring shaft, and the connecting gear is meshed with the rack, can make semi-gear and pinion rack discontinuous meshing through driving motor, under the effect of two first springs, can make the vertical reciprocating motion of pinion rack, can make the horizontal reciprocating motion of rack through the connecting rod, under the effect of connecting gear, can make the (mixing) shaft drive a plurality of puddlers reciprocating rotation, and then can stir sewage and disinfection medicine, make the two can the intensive mixing, can purify the disinfection to sewage, reduce the smell that sewage brought, improve the environment of pump station.

Preferably, the left side of glass steel casing is rotated and is connected with the screw spindle, threaded connection has the threading board on the screw spindle, the right side fixedly connected with card post of threading board, the draw-in groove with card post looks adaptation is seted up to the bottom of filter screen, card post and draw-in groove looks chucking, the constant head tank has been seted up on the bottom inner wall of glass steel casing, the bottom and the constant head tank of filter screen clamp mutually, the top inner wall and the fixedly connected with arm-tie of glass steel casing are run through at the top of filter screen, and the counter rotation screw spindle, the screw spindle can make the threading board remove left to can make in the card post shifts out the draw-in groove, then the pulling arm-tie, just can pull out the filter screen in the glass steel casing, thoroughly clear up or change.

Preferably, the right side of the stirring shaft is fixedly connected with a strong magnet, the inner wall of the top of the glass fiber reinforced plastic shell is slidably connected with a sliding plate, the left side of the sliding plate is fixedly connected with an impact plate, the left side of the impact plate is attached to the right side of the filter screen, the top of the glass fiber reinforced plastic shell is fixedly connected with a fixed plate, the right side of the fixed plate is fixedly connected with a second spring, the right end of the second spring is fixedly connected with the left side of the sliding plate, the right side of the sliding plate is fixedly connected with an adsorption iron block, the strong magnet can rotate along with the stirring shaft in a reciprocating manner while the stirring shaft rotates in a reciprocating manner, when the strong magnet rotates to one side of the adsorption iron block, the magnetic force of the strong magnet can attract the adsorption iron block to move rightwards, the sliding plate can drive the impact plate to move rightwards, the second spring is stretched, and when the strong magnet rotates out of one side of the adsorption iron block, adsorb the iron plate and can lose the appeal, under the effect of second spring, can make sliding plate and striking plate reset rapidly left, the striking plate can strike the filter screen like this, makes the filter screen produce vibrations to can drop attached to tiny impurity on the filter screen, prevent that the filter screen from blockking up, can reduce the number of times to the filter screen clearance like this, can improve the filter effect simultaneously.

Preferably, sliding connection has the movable plate on the bottom inner wall of headstock, the left side of movable plate and the right side fixed connection of rack, the movable plate can support the rack, and can make the rack can remove more firm.

Preferably, the spout has been seted up at the top of base, the bottom of threading board and the bottom inner wall sliding connection of spout, the spout can carry on spacingly to the threading board, prevents that the threading board from rotating along with the screw axis, can make the threading board can steady movement simultaneously.

Has the advantages that: impurity in can being sewage is filtered through the filter screen, can be to adding the disinfection medicine in the glass steel casing through adding the pencil, can make semi-gear and pinion rack discontinuous meshing through driving motor, under the effect of two first springs, can make pinion rack longitudinal reciprocating motion, can make rack transverse reciprocating motion through the connecting rod, under the effect of connecting the gear, can make the (mixing) shaft drive a plurality of puddler reciprocating rotation, and then can stir sewage and disinfection medicine, make the two can the intensive mixing, can purify the disinfection to sewage, reduce the smell that sewage brought, improve the environment of pump station.

In the reciprocating rotation of (mixing) shaft, can make powerful magnet along with the reciprocating rotation of (mixing) shaft, when powerful magnet rotates to the one side of adsorbing the iron plate, powerful magnet's magnetic force can attract to adsorb the iron plate and move right, and then can make the sliding plate drive the striking plate and move right, the second spring is stretched, when powerful magnet rolled out one side of adsorbing the iron plate, adsorb the iron plate and can lose the appeal, under the effect of second spring, can make sliding plate and striking plate reset rapidly left, the striking plate can strike the filter screen like this, make the filter screen produce vibrations, thereby can drop attached to tiny impurity on the filter screen, prevent that the filter screen from blockking up, can reduce the number of times to the filter screen clearance like this, can improve the filter effect simultaneously.

The sewage treatment device is reasonable in structure and convenient to operate, the filter screen can filter impurities in sewage, the impurities are prevented from influencing a pump station, the stirring shaft can be rotated in a reciprocating mode through the power assembly, the sewage and the disinfectant can be stirred, the sewage and the disinfectant can be fully mixed, the sewage can be purified and disinfected, the smell caused by the sewage is reduced, and the environment of the pump station is improved.

Drawings

FIG. 1 is a schematic structural view of an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment according to the present invention;

FIG. 2 is a schematic sectional structural view of a power box of the integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment provided by the utility model;

FIG. 3 is a schematic view of a local three-dimensional structure of an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment according to the present invention;

FIG. 4 is an enlarged schematic structural view of part A of an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment according to the present invention;

fig. 5 is an enlarged structural schematic diagram of a part B of the integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment provided by the utility model.

In the figure: the device comprises a base 1, a glass fiber reinforced plastic shell 2, a filter screen 3, a power box 4, a stirring shaft 5, a driving motor 6, a half gear 7, a toothed plate 8, a connecting rod 9, a rack 10, a connecting gear 11, a moving plate 12, a supporting plate 13, a first spring 14, a powerful magnet 15, a sliding plate 16, a striking plate 17, an iron adsorption block 18, a second spring 19, a threaded shaft 20, a threaded plate 21, a clamping column 22 and a sliding chute 23.

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.

Referring to fig. 1-5, an integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment comprises a base 1, a glass fiber reinforced plastic shell 2 is fixedly connected to the top of the base 1, a box door is arranged on the glass fiber reinforced plastic shell 2, the glass fiber reinforced plastic shell 2 can be opened through the box door, the interior of the glass fiber reinforced plastic shell 2 can be conveniently cleaned and maintained, compared with a traditional maintenance ladder, the integrated glass fiber reinforced plastic prefabricated pump station is more convenient and faster, a filter screen 3 is clamped in the glass fiber reinforced plastic shell 2, a water inlet pipe is arranged on the left side of the glass fiber reinforced plastic shell 2, a power box 4 is fixedly connected to the top of the glass fiber reinforced plastic shell 2, a power assembly is arranged in the power box 4, a stirring shaft 5 is connected to the power assembly in a transmission manner, the bottom end of the stirring shaft 5 extends into the glass fiber reinforced plastic shell 2 and is rotatably connected with the inner wall of the bottom of the glass fiber reinforced plastic shell 2, a plurality of stirring rods are fixedly connected to the stirring shaft 5, a dosing pipe is arranged on the top of the glass fiber reinforced plastic shell 2, a disinfectant can be added into the glass fiber reinforced plastic shell 2 through the dosing pipe, the disinfection medicament can purify and disinfect sewage, reduce odor caused by the sewage and improve the environment of a pump station, the bottom of the right side of the glass fiber reinforced plastic shell 2 is provided with a drain pipe, the drain pipe is provided with a drain valve, the inner wall of the left side of the glass fiber reinforced plastic shell 2 is fixedly connected with a baffle, the left side of the filter screen 3 is in sliding connection with the right side of the baffle, filtered impurities can fall on the baffle and are convenient for post-treatment, the power assembly comprises a driving motor 6, a half gear 7, a toothed plate 8, a connecting rod 9, a rack 10 and a connecting gear 11, the rear side of the driving motor 6 is fixedly connected with the rear wall of the power box 4, the half gear 7 is fixedly sleeved at the front end of an output shaft of the driving motor 6, the inner wall of the left side of the power box 4 is in sliding connection with a support plate 13, the top of the support plate 13 is fixedly connected with the bottom of the toothed plate 8, the half gear 7 is meshed with the toothed plate 8, the bottom of the support plate 13 is symmetrically and fixedly connected with a first spring 14, the number of the first springs 14 is two, the bottom ends of the two first springs 14 are fixedly connected with the inner wall of the bottom of the power box 4, the first springs 14 can provide reset power for the supporting plate 13 and the toothed plate 8, the top end of the connecting rod 9 is rotatably connected with the right side of the toothed plate 8, the bottom end of the connecting rod 9 is rotatably connected with the top of the rack 10, the top end of the stirring shaft 5 extends into the power box 4, the connecting gear 11 is fixedly sleeved at the top end of the stirring shaft 5, the connecting gear 11 is meshed with the rack 10, impurities in sewage can be filtered through the filter screen 3, disinfectant can be added into the glass fiber reinforced plastic shell 2 through the disinfectant adding pipe, the half gear 7 can be intermittently meshed with the toothed plate 8 through the driving motor 6, the toothed plate 8 can longitudinally reciprocate under the action of the two first springs 14, the rack 10 can transversely reciprocate through the connecting rod 9, under the action of the connecting gear 11, the stirring shaft 5 can drive the stirring rods to rotate in a reciprocating mode, further the sewage and the disinfectant can be stirred, the sewage and the disinfectant can be fully mixed, the sewage can be purified and disinfected, the odor caused by the sewage is reduced, and the environment of a pump station is improved.

In the utility model, the inner wall of the bottom of the power box 4 is connected with the moving plate 12 in a sliding manner, the left side of the moving plate 12 is fixedly connected with the right side of the rack 10, the moving plate 12 can support the rack 10, and the rack 10 can move more stably.

In the utility model, a powerful magnet 15 is fixedly connected to the right side of a stirring shaft 5, a sliding plate 16 is slidably connected to the inner wall of the top of a glass fiber reinforced plastic shell 2, a striking plate 17 is fixedly connected to the left side of the sliding plate 16, the left side of the striking plate 17 is attached to the right side of a filter screen 3, a fixed plate is fixedly connected to the top of the glass fiber reinforced plastic shell 2, a second spring 19 is fixedly connected to the right side of the fixed plate, the right end of the second spring 19 is fixedly connected to the left side of the sliding plate 16, the second spring 19 can provide reset power for the sliding plate 16 and the striking plate 17, so that the striking plate 17 can have a fast moving force to conveniently strike the filter screen 3, an adsorption iron block 18 is fixedly connected to the right side of the sliding plate 16, the powerful magnet 15 can rotate back and forth along with the stirring shaft 5 while the stirring shaft 5 rotates back and forth, when the powerful magnet 15 rotates to one side of the adsorption iron block 18, powerful magnet 15's magnetic force can attract to adsorb iron plate 18 and move to the right, and then can make sliding plate 16 drive striking plate 17 and move to the right, second spring 19 is stretched, when powerful magnet 15 rolled out one side of adsorbing iron plate 18, adsorb iron plate 18 and can lose appeal, under second spring 19's effect, can make sliding plate 16 and striking plate 17 reset rapidly left, striking plate 17 can strike filter screen 3 like this, make filter screen 3 produce vibrations, thereby can drop attached to the tiny impurity on filter screen 3, prevent that filter screen 3 from blockking up, can reduce the number of times to filter screen 3 clearance like this, can improve the filter effect simultaneously.

According to the utility model, the left side of the glass fiber reinforced plastic shell 2 is rotatably connected with a threaded shaft 20, the threaded shaft 20 is in threaded connection with a threaded plate 21, the right side of the threaded plate 21 is fixedly connected with a clamping column 22, the bottom of the filter screen 3 is provided with a clamping groove matched with the clamping column 22, the clamping column 22 is clamped with the clamping groove, the inner wall of the bottom of the glass fiber reinforced plastic shell 2 is provided with a positioning groove, the bottom of the filter screen 3 is clamped with the positioning groove, the top of the filter screen 3 penetrates through the inner wall of the top of the glass fiber reinforced plastic shell 2 and is fixedly connected with a pulling plate, the threaded shaft 20 is rotated reversely, the threaded plate 21 can be moved leftwards by the threaded shaft 20, so that the clamping column 22 can be moved out of the clamping groove, and then the pulling plate is pulled, so that the filter screen 3 can be pulled out of the glass fiber reinforced plastic shell 2 for complete cleaning or replacement.

In the utility model, the sliding groove 23 is formed in the top of the base 1, the bottom of the thread plate 21 is in sliding connection with the inner wall of the bottom of the sliding groove 23, the sliding groove 23 can limit the thread plate 21, the thread plate 21 is prevented from rotating along with the thread shaft 20, and meanwhile, the thread plate 21 can stably move.

The working principle is as follows: when the sewage treatment device is used specifically, sewage enters the glass fiber reinforced plastic shell 2 through the water inlet pipe, the filter screen 3 can filter impurities in the sewage, larger filtered impurities can be accumulated on the baffle, the filtered sewage can flow to the area of the stirring shaft 5, then the disinfection medicine is adjusted into the glass fiber reinforced plastic shell 2 through the medicine adding pipe, the driving motor 6 is started, the output shaft of the driving motor 6 can enable the half gear 7 to rotate clockwise, the toothed plate 8 and the supporting plate 13 can move downwards, the two first springs 14 can be compressed, the toothed plate 8 moves downwards, the rack 10 can move rightwards through the connecting rod 9, the stirring shaft 5 can rotate forwards through the connecting gear 11, when the half gear 7 is disengaged from the toothed plate 8, the supporting plate 13 and the toothed plate 8 can move upwards to reset under the action of the first springs 14, the rack 10 can move leftwards through the connecting rod 9, and then can make the stirring shaft 5 rotate reversely, so that the stirring shaft 5 can drive a plurality of stirring rods to rotate reciprocally, thereby stirring the sewage and the disinfectant, and making the sewage and the disinfectant fully mix, the disinfectant can purify and disinfect the sewage, reduce the odor caused by the sewage, and improve the environment of the pump station, at the same time of the reciprocating rotation of the stirring shaft 5, the strong magnet 15 can rotate reciprocally along with the stirring shaft 5, when the strong magnet 15 rotates to one side of the adsorption iron block 18, the magnetic force of the strong magnet 15 can attract the adsorption iron block 18 to move rightwards, so that the sliding plate 16 can drive the impact plate 17 to move rightwards, the second spring 19 is stretched, when the strong magnet 15 rotates out of one side of the adsorption iron block 18, the adsorption iron block 18 can lose attraction, under the action of the second spring 19, the sliding plate 16 and the impact plate 17 can be reset leftwards rapidly, striking plate 17 can strike filter screen 3 like this, make filter screen 3 produce vibrations, thereby can drop attached to the tiny impurity on filter screen 3, prevent that filter screen 3 from blockking up, the number of times of cleaning up filter screen 3 can be reduced like this, simultaneously, can improve the filter effect, after sewage purification disinfection finishes, close driving motor 6, open the drain valve, sewage after the purification can discharge through the drain pipe, at this moment, the chamber door can be opened, impurity on the baffle is cleared up, when needs are changed or thoroughly cleared up filter screen 3, reverse rotation threaded spindle 20, threaded spindle 20 can make threaded plate 21 remove left, thereby can make in the card post 22 shifts out the draw-in groove, then the pulling arm, just can pull out filter screen 3 in glass steel housing 2, thoroughly clear up or change.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment comprises a base (1) and is characterized in that a glass fiber reinforced plastic shell (2) is fixedly connected to the top of the base (1), a box door is arranged on the glass fiber reinforced plastic shell (2), a filter screen (3) is clamped in the glass fiber reinforced plastic shell (2), a water inlet pipe is arranged on the left side of the glass fiber reinforced plastic shell (2), a power box (4) is fixedly connected to the top of the glass fiber reinforced plastic shell (2), a power assembly is arranged in the power box (4), a stirring shaft (5) is connected to the power assembly in a transmission mode, the bottom end of the stirring shaft (5) extends into the glass fiber reinforced plastic shell (2) and is connected with the inner wall of the bottom of the glass fiber reinforced plastic shell (2) in a rotating mode, a plurality of stirring rods are fixedly connected to the stirring shaft (5), a chemical feeding pipe is arranged at the top of the glass fiber reinforced plastic shell (2), and a drain pipe is arranged at the bottom of the right side of the glass fiber reinforced plastic shell (2), the drain pipe is provided with a drain valve, the inner wall of the left side of the glass fiber reinforced plastic shell (2) is fixedly connected with a baffle, and the left side of the filter screen (3) is connected with the right side of the baffle in a sliding manner.

2. The prefabricated pump station of integration glass steel for sewage treatment according to claim 1, characterized in that, power component includes driving motor (6), half gear (7), pinion rack (8), connecting rod (9), rack (10) and connecting gear (11), the rear side of driving motor (6) and the rear wall fixed connection of headstock (4), half gear (7) fixed cover is established at the output shaft front end of driving motor (6), sliding connection has backup pad (13) on the left side inner wall of headstock (4), the top of backup pad (13) and the bottom fixed connection of pinion rack (8), half gear (7) and pinion rack (8) mesh mutually, the bottom symmetry fixed connection of backup pad (13) has first spring (14), first spring (14) are two, the bottom of two first springs (14) all is connected with the bottom inner wall fixed connection of headstock (4), the top of connecting rod (9) rotates with the right side of pinion rack (8) to be connected, the bottom of connecting rod (9) rotates with the top of rack (10) to be connected, the top of (mixing) shaft (5) extends to in headstock (4), the fixed top of establishing at (mixing) shaft (5) of connecting gear (11), connecting gear (11) and rack (10) mesh mutually.

3. The prefabricated pump station of integration glass steel for sewage treatment according to claim 1, characterized in that, the left side of glass steel casing (2) is rotated and is connected with screw shaft (20), threaded connection has screw plate (21) on screw shaft (20), the right side fixedly connected with card post (22) of screw plate (21), the draw-in groove with card post (22) looks adaptation is seted up to the bottom of filter screen (3), card post (22) and draw-in groove looks clamping, seted up the constant head tank on the bottom inner wall of glass steel casing (2), the bottom and the constant head tank of filter screen (3) clamp mutually, the top of filter screen (3) runs through the top inner wall and the fixedly connected with arm-tie of glass steel casing (2).

4. The prefabricated pump station of integration glass steel for sewage treatment according to claim 1, characterized in that, the right side of (mixing) shaft (5) fixedly connected with powerful magnet (15), sliding plate (16) has been connected with on the top inner wall of glass steel casing (2) in a sliding manner, the left side fixedly connected with striking plate (17) of sliding plate (16), the left side of striking plate (17) is laminated with the right side of filter screen (3), the top fixedly connected with fixed plate of glass steel casing (2), the right side fixedly connected with second spring (19) of fixed plate, the right-hand member of second spring (19) and the left side fixed connection of sliding plate (16), the right side fixedly connected with of sliding plate (16) adsorbs iron plate (18).

5. The prefabricated pump station of integration glass steel for sewage treatment according to claim 2, characterized in that, sliding connection has a movable plate (12) on the bottom inner wall of headstock (4), the left side and the right side fixed connection of rack (10) of movable plate (12).

6. The integrated glass fiber reinforced plastic prefabricated pump station for sewage treatment according to claim 3, wherein a sliding groove (23) is formed in the top of the base (1), and the bottom of the threaded plate (21) is in sliding connection with the inner wall of the bottom of the sliding groove (23).