CN114474751A

CN114474751A - PE pipeline connecting equipment for hydraulic engineering

Info

Publication number: CN114474751A
Application number: CN202210045227.2A
Authority: CN
Inventors: 曾丽娉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-15
Filing date: 2022-01-15
Publication date: 2022-05-13

Abstract

The invention relates to a pipeline connecting device, in particular to a PE pipeline connecting device for hydraulic engineering. The technical problem of the invention is that: the PE pipeline connecting equipment for the hydraulic engineering is simple and convenient in structure, convenient to use and capable of improving heat junction efficiency and increasing buffering safety protection measures. The technical implementation scheme of the invention is as follows: the utility model provides a PE pipeline jointing equipment for hydraulic engineering, including: a base; the clamping mechanism is arranged on one side of the top of the base; the hot connection mechanism is arranged on one side of the top of the base; the heater is symmetrically and rotatably arranged on the hot connection mechanism. According to the invention, two PE pipelines needing heat connection are arranged on the clamping mechanism by people, and the position of the clamping mechanism is movably adjusted to be matched with the heat connection mechanism, so that the heater is connected with the interface between the two PE pipelines and performs heat connection on the two PE pipelines, and the effect of improving the heat connection efficiency is achieved.

Description

PE pipeline connecting equipment for hydraulic engineering

Technical Field

The invention relates to pipeline connecting equipment, in particular to PE pipeline connecting equipment for hydraulic engineering.

Background

The PE pipelines are widely applied to field operation, generally, the connection between the PE pipelines can be realized by adopting a hot connection device to carry out sealing hot connection, namely, after the end parts of the two PE pipelines are heated, the two PE pipelines are close to each other, and can be connected together after being re-solidified, but because of the obvious characteristics of expansion with heat and contraction with cold of the PE pipelines, the hot connection position is easy to break after the hot connection is finished, and liquid leakage occurs. In addition, when the PE pipe is used in some installation sites where the space is narrow, the heat connection device with a large volume cannot be used, and the conventional heat connection method cannot meet the connection requirement of the PE pipe.

Therefore, it is necessary to design a PE pipeline connecting device for hydraulic engineering, which has a simple structure and convenient use, can improve the thermal connection efficiency and increase the buffering safety protection measures.

Disclosure of Invention

In order to overcome the defects that a heat connecting device with a larger volume cannot be used and cannot meet the connection requirement of a PE pipeline, the invention has the technical problems that: the PE pipeline connecting equipment for the hydraulic engineering is simple and convenient in structure, convenient to use and capable of improving heat junction efficiency and increasing buffering safety protection measures.

The technical implementation scheme of the invention is as follows: the utility model provides a PE pipeline jointing equipment for hydraulic engineering, including: a base; the clamping mechanism is arranged on one side of the top of the base; the hot connection mechanism is arranged on one side of the top of the base; the heater is symmetrically and rotatably arranged on the hot connection mechanism.

Optionally, the clamping mechanism comprises: the first sliding rail is arranged on one side of the top of the base; the first sliding frame is symmetrically and slidably arranged on the first sliding rail; the clamping rods are symmetrically and rotatably arranged on the first sliding frame; the top of the base is symmetrically provided with the first ejector rods, and the clamping rods are matched with the first ejector rods; the second mounting bracket, base top middle part are equipped with the second mounting bracket, and the symmetry rotary type is equipped with the clamping bar around also on the second mounting bracket, and every clamping bar inboard all is connected with torsion spring for reset.

Optionally, the thermal connection mechanism comprises: the top of the base is provided with a second sliding rail; the second sliding rack is symmetrically and slidably arranged on the second sliding rail; the sliding rods are arranged on the second sliding frame in a sliding mode, and the heater is connected with the sliding rods; the connecting plate is arranged on one side of the sliding rod, elastic pieces are connected between the connecting plate and the second sliding frame, and the elastic pieces are sleeved on the sliding rod respectively.

Optionally, the device further comprises a positioning mechanism, wherein the positioning mechanism comprises: the top of the base is uniformly provided with four first guide rails at intervals; the top of the base is symmetrically and rotatably provided with a rotating shaft; the rotating shafts are provided with first gears; the first guide rail is provided with a first rack in a sliding manner, and the first rack is meshed with the first gear; the first push rods are connected to the first racks on the two sides and matched with the connecting plate; and a second ejector rod is arranged on one side of the middle first rack.

Optionally, still include the mechanism that pushes forward, the mechanism that pushes forward includes: a first guide rod is arranged on one side of the second mounting frame; the first guide rod is provided with a first sliding frame in a sliding manner; a handle is arranged on one side of the third sliding frame; the second push rods are symmetrically arranged on the third sliding frame in a sliding manner and are matched with the second ejector rods; first springs are connected between the first sliding frame and the second push rod, and the first springs are respectively sleeved on the first guide rods.

Optionally, the device further comprises a taking-out mechanism, and the taking-out mechanism comprises: the first sliding rail is provided with a first sliding rail; the third slide rail is symmetrically provided with a second guide rod; the second racks are arranged on the second guide rods in a sliding manner; the second springs are connected between the second rack and the third slide rail and are respectively sleeved on the second guide rods; the fourth sliding frame is arranged on the first guide rod in a sliding mode and matched with the handle; the fourth sliding frame is symmetrically provided with connecting rods; the stop block is rotatably arranged between one sides of the connecting rods; the stop lever is arranged between one sides of the connecting rods and matched with the stop block; and the second gear is symmetrically arranged on the stop block and is meshed with the second rack.

Optionally, still including strutting the mechanism, strutting the mechanism and including: the inner sides of the lower parts of the first sliding frames are provided with first limiting rods; the limiting frame is symmetrically arranged on one side of the handle, and the first limiting rod is matched with the limiting frame; the pull rods are arranged on one sides of the first sliding frames on the two sides; the outer sides of the second sliding frames are provided with second limiting rods, and the second limiting rods are matched with the pull rods; and a third spring is connected between the first sliding frames.

Optionally, the device further comprises a shell, and the shell is arranged on one side of the top of the base.

The invention has the beneficial effects that: 1. according to the invention, two PE pipelines needing heat connection are arranged on the clamping mechanism by people, and the position of the clamping mechanism is movably adjusted to be matched with the heat connection mechanism, so that the heater is connected with the interface between the two PE pipelines and performs heat connection on the two PE pipelines, and the effect of improving the heat connection efficiency is achieved.

2. The sliding rod and the heater are driven by the first push rod to move rightwards, the interfaces at two ends between the PE pipelines are arranged between the heaters, and at the moment, when the handle is continuously pushed leftwards, the second push rod cannot be pushed by the second push rod, so that the first spring is compressed, and the effect of increasing buffering safety protection measures is achieved.

3. According to the invention, the handle and the limiting frame are moved leftwards, the convex part of the limiting frame is contacted with the first limiting rod and extruded to be opened outwards, the clamping rod is contacted with the first ejector rod to be opened to install the PE pipeline, and meanwhile, the pull rod is driven to be opened outwards to drive the second limiting rod, the second sliding frame and the heater to be opened outwards, so that the heater can wrap the port of the PE pipeline, and the hot connection work can be more convenient.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a perspective view of the clamping mechanism and the thermal interface mechanism of the present invention.

Fig. 4 is a schematic perspective view of the positioning mechanism of the present invention.

Fig. 5 is a schematic perspective view of the pushing mechanism of the present invention.

Fig. 6 is a schematic perspective view of the removing mechanism of the present invention.

Fig. 7 is a schematic perspective view of the distracting mechanism of the present invention.

Description of reference numerals: 1: base, 2: heater, 3: clamping mechanism, 31: first slide rail, 32: first carriage, 33: clamping rod, 34: first ejector pin, 35: second mounting bracket, 4: thermal bonding mechanism, 41: second slide rail, 42: second carriage, 43: slide bar, 44: connecting plate, 5: positioning mechanism, 51: first guide rail, 52: rotating shaft, 53: first gear, 54: first rack, 55: first push rod, 56: second ejector pin, 6: forward pushing mechanism, 61: first guide bar, 62: third carriage, 63: grip, 64: second push rod, 65: first spring, 7: take-out mechanism, 71: third slide rail, 72: second guide bar, 73: second spring, 74: second rack, 75: fourth carriage, 76: connecting rod, 77: stop, 78: stop lever, 79: second gear, 8: distraction mechanism, 81: first stopper rod, 82: spacing, 83: tie rod, 84: second stopper rod, 85: third spring, 9: a housing.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

Example 1

A PE pipeline connecting device for hydraulic engineering is shown in figures 1-3 and comprises a base 1, a heater 2, a clamping mechanism 3 and a hot connection mechanism 4, wherein the clamping mechanism 3 is arranged on the right side of the top of the base 1, the hot connection mechanism 4 is arranged on the left side of the top of the base 1, and the heater 2 is arranged on the hot connection mechanism 4 in a front-back symmetrical rotating mode.

Firstly, people install three PE pipelines needing hot connection on the clamping mechanism 3, and move and adjust the position of the clamping mechanism 3 to be matched with the hot connection mechanism 4, so that the heater 2 is connected with interfaces among the three PE pipelines and carries out hot connection on the three PE pipelines, and the effect of improving the hot connection efficiency is achieved.

Clamping mechanism 3 is including first slide rail 31, first carriage 32, clamping bar 33, first ejector pin 34 and

second mounting bracket

35, 1 top right side of base is equipped with first slide rail 31, the symmetry slidingtype is equipped with first carriage 32 around on the first slide rail 31, the symmetry rotary type is equipped with clamping bar 33 around on the first carriage 32 all, the symmetry is equipped with first ejector pin 34 around the 1 top of base, cooperate between clamping bar 33 and the first ejector pin 34, 1 top middle part of base is equipped with second mounting bracket 35, the symmetry rotary type is equipped with clamping bar 33 around also on the second mounting bracket 35, every clamping bar 33 inboard all is connected with torsion spring, be used for reseing.

The hot connection mechanism 4 comprises a second slide rail 41, a second slide frame 42, a slide rod 43 and a connecting plate 44, the second slide rail 41 is arranged at the top of the base 1, the second slide frame 42 is symmetrically arranged on the second slide rail 41 in a front-back sliding manner, the slide rods 43 are arranged on the second slide frame 42 in a sliding manner, the heater 2 is connected with the slide rods 43, the connecting plate 44 is arranged on the left side of each slide rod 43, elastic pieces are connected between the connecting plate 44 and the second slide frame 42, and the elastic pieces are respectively sleeved on the slide rods 43.

Two PE pipelines are respectively arranged on clamping rods 33 on the front side and the rear side, the first sliding frame 32 is moved inwards, the clamping rods 33 are separated from a first ejector rod 34, the PE pipelines are clamped and fixed by the clamping rods 33 on the first sliding frame 32 under the action of a torsion spring, the PE pipelines are also arranged on the clamping rods 33 on the second mounting frame 35, the second sliding frame 42 is adjusted forwards and backwards to enable the ports of the PE pipelines to be close to each other, the sliding rod 43 is pushed rightwards to push the sliding rod 43, an elastic part on the sliding rod 43 is compressed to drive the two heaters 2 to move rightwards, interfaces at two ends between the PE pipelines are arranged between the heaters 2, heat is conducted between the PE pipelines through the heaters 2, after the connection work of the PE pipelines is completed, the first sliding frames 32 on two sides are moved outwards, the clamping rods 33 on the first sliding frame 32 are contacted with the first ejector rod 34, the clamping rods 33 are squeezed and opened, the torsion spring deforms, and accordingly two sides of the PE pipelines are loosened, then, the PE pipe can be taken out, and after the PE pipe is separated from the heater 2, the sliding rod 43 and the heater 2 move leftward to be restored under the restoring action of the elastic member on the sliding rod 43.

Example 2

On the basis of embodiment 1, as shown in fig. 4 to 7, the positioning device further includes a positioning mechanism 5, the positioning mechanism 5 includes a first guide rail 51, a rotating shaft 52, a first gear 53, a first rack 54, a first push rod 55 and a second push rod 56, four first guide rails 51 are uniformly arranged at intervals on the top of the base 1, the rotating shaft 52 is symmetrically arranged on the top of the base 1 in a front-back rotating manner, the first gear 53 is arranged on the rotating shaft 52, the first rack 54 is arranged on the first guide rails 51 in a sliding manner, the first rack 54 is engaged with the first gear 53, the first push rods 55 are connected to the first rack 54 on the front and back sides, the first push rods 55 are matched with the connecting plate 44, and the second push rod 56 is arranged on the right side of the middle first rack 54.

Still including preceding pushing mechanism 6, preceding pushing mechanism 6 is including first guide bar 61, third carriage 62, handle 63, second push rod 64 and first spring 65, second mounting bracket 35 right side is equipped with first guide bar 61, the gliding formula is equipped with third carriage 62 on first guide bar 61, the right side is equipped with handle 63 on the third carriage 62, the symmetry is slided type and is equipped with second push rod 64 around on the third carriage 62, cooperate between second push rod 64 and the second ejector pin 56, all be connected with first spring 65 between third carriage 62 and the second push rod 64, first spring 65 suit respectively is on first guide bar 61.

People hold the handle 63 to push to the left, the handle 63 and the second push rod 64 move to the left, the second push rod 64 contacts the second push rod 56 to drive the second push rod 56 and the middle first rack 54 to move to the left, so that the first gear 53 rotates to drive the first racks 54 at two sides to move to the right, the first push rod 55 drives the sliding rod 43 and the heater 2 to move to the right, the interfaces at two ends between the PE pipelines are arranged between the heaters 2, the elastic part on the sliding rod 43 is compressed, at the moment, when the handle 63 continues to push to the left, the second push rod 56 cannot be pushed by the second push rod 64, so that the first spring 65 is compressed, the effect of increasing buffering safety protection measures is achieved, the working injury caused by too much deviation of the heaters 2 is prevented, after the heat between the ports of the PE pipelines is completely heated, the handle 63 is pulled to the right, the second push rod 64 is driven to move to the right by the reset effect of the first spring 65, after the second push rod 64 is separated from the second push rod 56, under the action of the elastic member on the slide rod 43 being reset, the slide rod 43 and the heater 2 move leftwards to reset, the first push rod 55 drives the first racks 54 at the two sides to move leftwards to reset, and the first gear 53 rotates inwards to drive the first rack 54 and the second push rod 56 in the middle to move rightwards to reset.

The taking-out mechanism 7 is further included, the taking-out mechanism 7 includes a third slide rail 71, a second guide rod 72, a second spring 73, a second rack 74, a fourth sliding frame 75, a connecting rod 76, a stopper 77, a stop rod 78 and a second gear 79, the first slide rail 31 is provided with the third slide rail 71, the third slide rail 71 is provided with the second guide rod 72 symmetrically in the front-back direction, the second guide rod 72 is provided with the second rack 74 in the sliding manner, the second spring 73 is connected between the second rack 74 and the third slide rail 71, the second spring 73 is respectively sleeved on the second guide rod 72, the first guide rod 61 is provided with the fourth sliding frame 75 in the sliding manner, the fourth sliding frame 75 is matched with the handle 63, the fourth sliding frame 75 is provided with the connecting rod 76 symmetrically in the front-back direction, the stopper 77 is rotatably provided between the right sides of the connecting rods 76, the stop rod 78 is matched with the stopper 77, the stopper 77 is provided with a second gear 79 symmetrically in front and back, and the second gear 79 is engaged with the second rack 74.

When the handle 63 is moved to the left, the stopper 77 clamps the PE pipe and cannot rotate continuously, so that the second gear 79 is stopped rotating continuously, the handle 63 pushes the fourth carriage 75, the stopper 77, the second gear 79, the stopper 77 and the stopper 78 rotate continuously, the handle 63 pushes the fourth carriage 75, the PE pipe and the PE pipe move continuously to the left, the second gear 79 drives the second rack 74 to rotate continuously, the second gear 79 is clamped on the second rack 74, the handle 63 pushes the fourth carriage 75, the stopper 77, the second gear 79 and the PE pipe to move continuously to the left, the second rack 74 is driven by the second gear 79 to move leftwards, the second spring 73 is compressed, the PE pipeline is pushed to the left to be in a hot connection position, hot connection is conducted on the PE pipeline through the heater 2, after hot connection of the port between the PE pipelines is completed, the handle 63 is pulled back to the right, the handle 63 is separated from the fourth sliding frame 75, under the action of the second spring 73, the second rack 74 drives the second gear 79 and the baffle plate to move rightwards, the fourth sliding frame 75 is driven to push the PE pipeline which is completed with hot connection rightwards through the connecting rod 76, the PE pipeline is pushed by the fourth sliding frame 75 and presses the stop block 77 to rotate clockwise to be opened, the second gear 79 is driven to rotate clockwise on the second rack 74 to be separated from the second rack 74, and the PE pipeline can be taken out after the stop block 77 is opened.

Still including strutting the mechanism 8, it is including first gag lever post 81 to strut mechanism 8, spacing 82, the pull rod 83, second gag lever post 84 and third spring 85, first carriage 32 lower part inboard all is equipped with first gag lever post 81, the symmetry is equipped with spacing 82 around on the handle 63 left side, cooperate between first gag lever post 81 and the spacing 82, the left side all is equipped with pull rod 83 on the first carriage 32 of front and back both sides, the outside all is equipped with second gag lever post 84 on the second carriage 42, cooperate between second gag lever post 84 and the pull rod 83, be connected with third spring 85 between the first carriage 32.

The device also comprises a shell 9, wherein the shell 9 is arranged on the left side of the top of the base 1.

When people push the handle 63 leftwards, the handle 63 and the limiting frame 82 move leftwards, the convex part of the limiting frame 82 is contacted with the first limiting rod 81, the first sliding frame 32 and the clamping rod 33 are extruded to open outwards, the third spring 85 is stretched, the clamping rod 33 is contacted with the first ejector rod 34 to be opened, the PE pipeline is convenient to install, meanwhile, the first limiting rod 81, the first sliding frame 32 and the pull rod 83 open outwards, the pull rod 83 is contacted with the second limiting rod 84 to drive the second limiting rod 84, the second sliding frame 42 and the heater 2 to open outwards, the heater 2 can wrap the port of the PE pipeline, the hot connection work is more convenient, when the handle 63 and the limiting frame 82 continue to push leftwards, and the convex part of the limiting frame 82 is separated from the first limiting rod 81, the first sliding frame 32, the second sliding frame 82 and the heater 2 are reset by the first spring 65, The pull rod 83 and the clamping rod 33 move inwards, the clamping rod 33 is separated from the first ejector rod 34 to clamp the PE pipeline, meanwhile, after the middle clamping rod 33 pushes the middle section of the PE pipeline to the left, because the pull rod 83 is separated from the second limit rod 84, the second sliding frame 42 and the heater 2 move inwards, the heater 2 wraps and clamps the three sections of PE pipeline ports to perform hot connection, after the hot connection is completed, the handle 63 is pulled out rightwards, the handle 63 and the limiting frame 82 move rightwards, the convex part of the limiting frame 82 contacts with the first limiting rod 81 to drive the first limiting rod 81, the first sliding frame 32, the clamping rod 33 and the pull rod 83 to move outwards, the clamping rod 33 loosens the PE pipe, the PE pipe is pushed out rightwards by matching with the fourth sliding frame 75 and the stop block 77, the PE pipeline can be taken out of the shell 9, the shell 9 reduces the high temperature of the heater 2 contacted by people, and protection measures are taken for the work of people.

The technical principle of the embodiment of the present invention is described above in conjunction with the specific embodiments. The description is only intended to explain the principles of embodiments of the invention and should not be taken in any way as limiting the scope of the embodiments of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.

Claims

1. The utility model provides a PE pipeline jointing equipment for hydraulic engineering, characterized by, including:

a base (1);

the clamping mechanism (3) is arranged on one side of the top of the base (1);

the heat connecting mechanism (4) is arranged on one side of the top of the base (1);

the heater (2) is symmetrically and rotatably arranged on the heat connecting mechanism (4).

2. A PE pipe connection device for hydraulic engineering according to claim 1, characterised in that the clamping means (3) comprises:

a first sliding rail (31), wherein the first sliding rail (31) is arranged on one side of the top of the base (1);

the first sliding frame (32) is symmetrically and slidably arranged on the first sliding rail (31);

the clamping rods (33) are symmetrically and rotatably arranged on the first sliding frame (32);

the top of the base (1) is symmetrically provided with first ejector rods (34), and the clamping rods (33) are matched with the first ejector rods (34);

second mounting bracket (35), base (1) top middle part is equipped with second mounting bracket (35), and symmetrical rotary type is equipped with clamping bar (33) around also on second mounting bracket (35), and every clamping bar (33) inboard all is connected with torsion spring for reset.

3. A PE pipe connection equipment for hydraulic engineering according to claim 2, characterised in that the thermal interface (4) comprises:

the top of the base (1) is provided with a second sliding rail (41);

the second sliding rack (42) is symmetrically and slidably arranged on the second sliding rail (41);

the sliding rods (43) are arranged on the second sliding rack (42) in a sliding manner, and the heater (2) is connected with the sliding rods (43);

connecting plates (44) are arranged on one sides of the sliding rods (43), elastic pieces are connected between the connecting plates (44) and the second sliding frames (42), and the elastic pieces are sleeved on the sliding rods (43) respectively.

4. A PE pipe connection device for hydraulic engineering according to claim 3, characterised in that it also comprises a positioning mechanism (5), the positioning mechanism (5) comprising:

the top of the base (1) is uniformly provided with four first guide rails (51) at intervals;

the rotating shaft (52) is symmetrically and rotatably arranged at the top of the base (1);

the first gear (53) is arranged on each rotating shaft (52);

the first guide rail (51) is provided with a first rack (54) in a sliding manner, and the first rack (54) is meshed with the first gear (53);

the first push rods (55) are connected to the first racks (54) on the two sides of the first push rod (55), and the first push rods (55) are matched with the connecting plate (44);

a second top rod (56) is arranged on one side of the middle first rack (54).

5. A PE pipe connection device for water conservancy projects according to claim 4, characterized by further comprising a forward pushing mechanism (6), wherein the forward pushing mechanism (6) comprises:

the first guide rod (61) is arranged on one side of the second mounting frame (35);

a third sliding frame (62), wherein the third sliding frame (62) is arranged on the first guide rod (61) in a sliding manner;

a handle (63), wherein the handle (63) is arranged on one side of the third sliding frame (62);

the second push rod (64) is symmetrically and slidably arranged on the third sliding frame (62), and the second push rod (64) is matched with the second ejector rod (56);

first springs (65) are connected between the first spring (65), the third sliding frame (62) and the second push rod (64), and the first springs (65) are respectively sleeved on the first guide rods (61).

6. A PE pipe connection equipment for hydraulic engineering according to claim 5, characterized by further comprising a take-out mechanism (7), wherein the take-out mechanism (7) comprises:

a third slide rail (71), wherein the first slide rail (31) is provided with the third slide rail (71);

the second guide rods (72) are symmetrically arranged on the third slide rail (71);

the second rack (74) is arranged on the second guide rod (72) in a sliding manner;

the second springs (73) are connected between the second racks (74) and the third sliding rails (71), and the second springs (73) are respectively sleeved on the second guide rods (72);

the fourth sliding frame (75), the first guide rod (61) is provided with the fourth sliding frame (75) in a sliding way, and the fourth sliding frame (75) is matched with the handle (63);

the connecting rods (76) are symmetrically arranged on the fourth sliding rack (75);

the stop block (77) is rotatably arranged between one sides of the connecting rods (76);

the stop lever (78) is arranged between one sides of the connecting rods (76), and the stop lever (78) is matched with the stop block (77);

the second gear (79) is symmetrically arranged on the stop block (77), and the second gear (79) is meshed with the second rack (74).

7. A PE pipe connection device for water conservancy projects according to claim 6, characterized by further comprising a spreading mechanism (8), wherein the spreading mechanism (8) comprises:

the inner sides of the lower parts of the first sliding rack (32) are provided with first limiting rods (81);

the limiting frame (82) is symmetrically arranged on one side of the handle (63), and the first limiting rod (81) is matched with the limiting frame (82);

the pull rod (83) is arranged on one side of the first sliding frames (32) on the two sides;

the upper outer sides of the second sliding frames (42) are provided with second limiting rods (84), and the second limiting rods (84) are matched with the pull rods (83);

and a third spring (85), wherein the third spring (85) is connected between the first sliding frames (32).

8. A PE pipe connection device for water conservancy projects according to claim 7, characterized by further comprising a shell (9), wherein the shell (9) is arranged at the top of the base (1).