CN215918272U - Sorting execution device and metal sorting machine comprising same - Google Patents

Abstract

The utility model discloses a sorting execution device and a metal sorting machine comprising the same, wherein the sorting execution device comprises: the feeding part is provided with a feeding channel, the feeding channel is provided with a discharge hole, and the discharge hole is arranged downwards; the sorting boxes are arranged around the vertical central axis of the discharge port, are positioned on the lower side of the discharge port and are provided with sorting chambers, and the upper ends of the sorting chambers are provided with material receiving openings; the piece of blowing sets up two at least and with letter sorting case one-to-one, and the piece of blowing is located the upside of letter sorting case, and the piece of blowing is provided with the passageway of blowing, and the passageway of blowing disposes the mouth of blowing that is used for blowing out gas, and the mouth of blowing is located the downside of discharge gate, and the mouth of blowing is arranged towards vertical axis and around vertical axis, and the mouth of blowing is towards the letter sorting case that corresponds. The sorting execution device is compact in structure and occupies fewer positions.

Description

Sorting execution device and metal sorting machine comprising same

Technical Field

The utility model relates to material sorting equipment, in particular to a sorting execution device and a metal sorting machine comprising the same.

Background

The existing metal sorting machine for metal material sorting is characterized in that when metal materials pass through a metal detection device, the metal detection device identifies the type of the metal, the metal materials are transferred to a sorting execution device through a material channel, and a control host of the metal sorting machine implements specific sorting action through the sorting execution device according to the condition identified by the metal detection device. The existing sorting executing device usually adopts an air blowing piece, and a plurality of sorting boxes which are arranged in parallel are arranged corresponding to the air blowing piece. After the metal particles are separated from one end of the material channel, the control host controls the air blowing piece to blow the metal materials, and the metal materials are blown to the sorting box. The control main machine system is according to the different metal types that metal detection device discerned, through the blowing pressure of control blowing piece for different kinds of metal material obtains different parabolic trails, thereby different metal material can be thrown in the letter sorting case that corresponds, thereby realizes the letter sorting. The sorting executing device has the following defects: the structure is not compact enough, the occupied position is more, and particularly when the metal with more types and quantities is sorted; in addition, different blowing pressures need to be configured for different types of metals, and the pressure control of blowing sorting is complicated.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a sorting execution device which is compact in structure.

The utility model also provides a metal sorting machine with the sorting execution device.

According to a first aspect of the utility model, the sorting execution device comprises: the feeding part is provided with a feeding channel, the feeding channel is provided with a discharge hole, and the discharge hole is arranged downwards; the sorting boxes are arranged around the vertical central axis of the discharge port, the sorting boxes are positioned on the lower side of the discharge port, the sorting boxes are provided with sorting chambers, and the upper ends of the sorting chambers are provided with material receiving openings; the piece of blowing set up at least two and with letter sorting case one-to-one, the piece of blowing is located the upside of letter sorting case, the piece of blowing is provided with the gas channel, the gas channel disposes the mouth of blowing that is used for blowing out gas, the mouth of blowing is located the downside of discharge gate, the mouth orientation of blowing vertical axis centers on vertical axis arranges, the mouth orientation of blowing corresponds letter sorting case.

The sorting execution device provided by the embodiment of the utility model has at least the following beneficial effects: in the sorting executing device, each blowing piece and the corresponding sorting box respectively correspond to one type of materials. After the material fell down from the discharge gate, the passageway of blowing toward one piece of blowing provided compressed air, and the mouth of blowing will spout gas, and because the mouth orientation of blowing corresponds sorting case to the material will be blown toward this sorting case, should the sorting case receives the material through the receipts material opening of letter sorting cavity, thereby accomplishes the letter sorting. Because the letter sorting case and the piece of blowing adopt the mode of arranging around the vertical axis of the piece of blowing for overall structure is comparatively compact, is favorable to reducing the position that the device occupied. In addition, the letter sorting case of each group and the piece of blowing are for the distribution of rotational symmetry for the vertical axis of the piece of blowing, and the path distance when different kinds of materials are blown by gas and sent into the letter sorting case is equal to during concrete letter sorting, can make the input atmospheric pressure of each piece of blowing equal, thereby simplify the control of atmospheric pressure.

According to some embodiments of the utility model, the sorting bin further comprises a central chamber surrounding an outer periphery of the central chamber, the central chamber being provided with an upwardly facing opening opposite the outfeed opening.

According to some embodiments of the utility model, the blowing openings face obliquely downward and are arranged opposite to the corresponding receiving openings. The direction of the blowing openings can be seen with reference to the arrows in fig. 3.

According to some embodiments of the utility model, the receiving opening is directed obliquely upwards.

According to some embodiments of the utility model, the sorting device further comprises collecting boxes corresponding to the sorting boxes one by one, connecting pipelines are connected between the collecting boxes and the corresponding sorting boxes, the connecting pipelines are communicated with the sorting chamber and the inner cavities of the collecting boxes, and materials in the sorting boxes can enter the collecting boxes through the connecting pipelines.

According to some embodiments of the utility model, an end of the connection line near the collection tank is connected to an air extraction line, which is connected to an air extraction device.

According to some embodiments of the utility model, the feeding section comprises a mounting frame to which the blowing piece is mounted, and a feeding pipe connected to the mounting frame.

The metal sorting machine according to the second aspect of the embodiment of the utility model has any one of the sorting execution devices described above. The metal sorter of the embodiment of the second aspect of the utility model may also be configured as follows: the metal sorting machine includes: a frame; the screening device is arranged on the rack and used for screening out materials in a preset particle size range; the queuing device is arranged on the rack and used for arranging the materials screened by the screening device into a linear queue; the metal detection device is arranged on the rack and provided with a detection material channel for receiving the materials of the queuing device, and the metal detection device is used for detecting the metal types of the materials passing through the detection material channel; the sorting execution device is arranged on the rack, and the feeding channel is communicated with the detection material channel; the gas supply and control device is connected with the gas blowing piece to provide compressed gas; and the control host is electrically connected with the metal detection device and the gas supply and control device.

The metal sorting machine provided by the embodiment of the utility model has at least the following beneficial effects: the metal sorting machine adopting the sorting executing device has a compact structure and occupies a small position.

According to some embodiments of the utility model, the screening device comprises a screening bin, an upper screen, a lower screen, and a vibrator; the screening box is arranged on the rack, the upper screen and the lower screen are arranged on the screening box and divide the screening box into a feeding cavity, a middle feeding cavity and a discharging cavity, the mesh size of the upper screen is larger than that of the lower screen, the lower screen is obliquely arranged relative to the horizontal direction, one downward inclined end of the lower screen is arranged corresponding to the input side of the queuing device, and the vibrator is arranged on the screening box and used for enabling the upper screen and the lower screen to vibrate; the queuing device comprises a material receiving part, the material receiving part is connected with one end of the lower screen mesh, which is inclined downwards, a V-shaped groove is formed in the material receiving part, one end of the V-shaped groove is used for receiving materials of the lower screen mesh, one end of the detection material channel is provided with an input port used for receiving materials output by the other end of the V-shaped groove, and the other end of the detection material channel is communicated with the feeding channel; the air supply and control device comprises a compressed air source and electromagnetic valves connected with the air blowing pieces in a one-to-one correspondence mode, the compressed air source supplies air to the air blowing pieces through the electromagnetic valves, and the electromagnetic valves are electrically connected with the control host.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a sorting actuator according to an embodiment of the present invention;

fig. 2 is a top view of a sorting actuator according to an embodiment of the utility model;

FIG. 3 is a cross-sectional view taken in the direction A-A of the structure shown in FIG. 2;

FIG. 4 is a perspective view of a sorting actuator configured with a collection bin in accordance with an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a metal sorter according to an embodiment of the utility model;

fig. 6 is a partial structural view of a metal sorter according to an embodiment of the present invention.

Reference numerals:

the automatic sorting machine comprises a feeding part 100, a feeding channel 101, a discharging port 102, a vertical central axis 103, a mounting frame 110, a feeding pipe 120, a sorting box 200, a sorting chamber 201, a receiving opening 202, a blowing piece 300, a blowing channel 301, a blowing port 302, a central chamber 400, a collecting box 500, a connecting pipeline 600, an air pumping pipeline 700 and an air pumping device 800;

the device comprises a frame 1, a screening device 2, a screening box 21, an upper screen 22, a lower screen 23, a vibrator 24, a queuing device 3, a receiving part 31, a metal detection device 4, a sorting execution device 5, an air supply and control device 6, a control host 7 and a conveyor 8.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 3, a sorting performing apparatus includes: a feeding part 100, a sorting bin 200, and a blowing part 300. The feeding portion 100 is provided with a feeding channel 101, the feeding channel 101 is provided with a discharge port 102, and the discharge port 102 is disposed downward. Letter sorting case 200 sets up a plurality ofly and arranges around the vertical axis 103 of discharge gate 102, and letter sorting case 200 is located the downside of discharge gate 102, and letter sorting case 200 is provided with letter sorting cavity 201, and letter sorting cavity 201's upper end is configured with receipts material opening 202. The air blowing pieces 300 are arranged in a plurality of and in one-to-one correspondence with the sorting boxes 200, the air blowing pieces 300 are located on the upper sides of the sorting boxes 200, the air blowing pieces 300 are provided with air blowing channels 301, the air blowing channels 301 are provided with air blowing openings 302 used for blowing air, the air blowing openings 302 are located on the lower sides of the discharge holes 102, the air blowing openings 302 face the vertical central axis 103 and are arranged around the vertical central axis 103, and the air blowing openings 302 face the corresponding sorting boxes 200.

In the above sorting executing apparatus, each blowing member 300 and the corresponding sorting box 200 correspond to one type of material. After the material fell down from discharge gate 102, provide compressed air to the gas blowing channel 301 of a gas blowing piece 300, the gas blowing port 302 will blow out gas, and because the gas blowing port 302 is towards corresponding letter sorting case 200 to the material will be blown to this letter sorting case 200, and this letter sorting case 200 receives the material through the receipts material opening 202 of letter sorting cavity 201, thereby accomplishes the letter sorting. Because the sorting box 200 and the air blowing members 300 are arranged around the vertical central axis 103 of the air blowing members 300, the whole structure is compact, and the occupied positions of the device can be reduced. In addition, the sorting boxes 200 and the air blowing members 300 of each group are rotationally and symmetrically distributed relative to the vertical central axis 103 of the air blowing members 300, and the path distances of different types of materials blown by air and sent into the sorting boxes 200 are equivalent, so that the input air pressure of each air blowing member 300 can be equivalent during specific sorting, and the control of the air pressure is simplified.

In the embodiment, the downward receiving opening 202 is a circular opening, and the vertical central axis 103 of the receiving opening 202 is a vertical axis passing through the center of the circular opening. In other embodiments, the receiving opening 202 is not limited to a circular opening, but may be an opening having other shapes, and the central vertical axis 103 of the receiving opening 202 is a vertical axis passing through the geometric center of the shape of the receiving opening 202.

In an embodiment, further comprising a central chamber 400, the sorting bin 200 surrounds the periphery of the central chamber 400, and the central chamber 400 is provided with an upwardly facing opening opposite the outfeed 102. The central chamber 400 may be used to sort unidentified material, i.e. none of the individual blow ports 302 is blowing, the material falling directly into the central chamber 400. In an embodiment, the sorting bins 200 are enclosed together to form the central chamber 400.

In the embodiment, six sets of the sorting bins 200 and the air-blowing members 300 are provided, but other numbers, such as two sets, three sets or more sets, may be provided according to actual needs.

In the embodiment, the air blowing openings 302 face obliquely downward and are arranged opposite to the corresponding receiving openings 202, so that the materials are blown to the sorting boxes 200 better, and the sorting boxes 200 can receive the materials conveniently. In an embodiment, the receiving opening 202 is oriented obliquely upward, so as to better fit with the air blowing opening 302 oriented obliquely downward, and the material can enter the sorting box 200 more easily, thereby reducing the probability that the material flies out of the sorting box 200.

Referring to fig. 4, in the embodiment, the sorting device further includes collecting boxes 500 corresponding to the sorting boxes 200 one by one, connecting pipelines 600 are connected between the collecting boxes 500 and the corresponding sorting boxes 200, the connecting pipelines 600 communicate the sorting chamber 201 and the inner cavities of the collecting boxes 500, and the materials in the sorting boxes 200 can enter the collecting boxes 500 through the connecting pipelines 600. By providing the collection bin 500, the materials of the sorting bin 200 can be conveniently transferred. In an embodiment, a collection tank 500 and connecting line 600 are also provided in association with the central chamber 400 to transfer the material in the central chamber 400.

In the embodiment, an end of the connection pipe 600 near the collection tank 500 is connected with an air suction pipe 700, and the air suction pipe 700 is connected with an air suction device 800. One end of the connecting pipeline 600 close to the collecting box 500 can form negative pressure through the air exhaust device 800 and the air exhaust pipeline 700, so that the materials in the sorting box 200 can be adsorbed, and the materials can smoothly enter the collecting box 500.

In an embodiment, the feeding part 100 includes a mounting bracket 110 and a feeding pipe 120, the blowing member 300 is mounted to the mounting bracket 110, and the feeding pipe 120 is connected to the mounting bracket 110.

The sorting executing device can be applied to a metal sorting machine, and of course, the sorting executing device can also be applied to other material sorting occasions without being limited to the metal sorting machine.

Referring to fig. 5 to 6, there is a metal sorter including: the device comprises a frame 1, a screening device 2, a queuing device 3, a metal detection device 4, a sorting execution device 5, a gas supply and control device 6 and a control host 7. Screening device 2 sets up in frame 1, and screening device 2 is used for sieving out the material that is in predetermined particle size range. The queuing device 3 is arranged on the frame 1, and the queuing device 3 is used for arranging the materials screened by the screening device 2 into a linear queue. Metal detection device 4 sets up in frame 1, and metal detection device 4 is provided with the detection material way that is used for receiving the material of queuing apparatus 3, and metal detection device 4 is used for detecting the metal type through the material that detects the material way. Sorting actuating device 5 sets up in frame 1, and feedstock channel 101 and detection material way intercommunication. The gas supply and control device 6 is connected to the gas blowing member 300 to supply compressed gas. The control host 7 is electrically connected with the metal detection device 4 and the gas supply and control device 6.

When the metal sorting machine works, original materials firstly enter the screening device 2, after the materials are screened by the screening device 2, the materials which accord with a certain particle size range enter the queuing device 3 to form a queue, the materials which form the queue sequentially enter the detection material channel of the metal detection device 4 to detect the metal types, the metal detection device 4 transmits related information to the control host 7, and the detected materials enter the feeding channel 101 of the sorting execution device 5. The control host 7 controls the air supply and control device 6 to supply air to a certain air blowing piece 300 according to the metal type of a certain material, the air blowing port 302 of the air blowing piece 300 blows compressed air, and the material falling from the discharge port 102 is blown to the corresponding sorting box 200 for material collection.

In the embodiment, the metal detection device 4 may specifically adopt: in the field, there are many apparatuses for detecting metal species, and the apparatuses may be specifically selected according to actual situations.

In an embodiment, the screening device 2 comprises a screening box 21, an upper screen 22, a lower screen 23 and a vibrator 24. Screening case 21 sets up in frame 1, and upper screen 22 and lower screen 23 set up in screening case 21 and separate into material loading chamber and well material loading chamber and unloading chamber with screening case 21, and the mesh size of upper screen 22 is greater than the mesh size of lower screen 23, and lower screen 23 sets up for the horizontal direction slope, and the one end of lower screen 23 downward sloping corresponds the input side setting of queuing device 3, and vibrator 24 sets up in screening case 21 and is used for making upper screen 22 and lower screen 23 produce the vibration. The original material enters from the upper side of the upper screen 22, and after being screened by the upper screen 22, the material larger than the meshes of the upper screen 22 cannot enter the middle material cavity, so that the particle size of the material entering the middle material cavity and the lower screen 23 has an upper limit; the material which smoothly enters the lower screen 23 is further screened by the lower screen 23, and the material which is smaller than the meshes of the lower screen 23 falls into the blanking cavity, so that the particle size of the material left on the lower screen 23 has a lower limit; thus, in the above manner, a material having a predetermined particle size range can be screened out. Due to the inclined arrangement of the lower screen 23, the material will be moved to the input side of the queuing means 3 in cooperation with the vibrator 24. In an embodiment, the vibrator 24 may specifically be a vibration motor or other device capable of generating vibration. In other embodiments, the screening device 2 may also adopt other suitable structures, and is not limited to the above-mentioned embodiments, and may be configured by those skilled in the art according to the actual situation.

In the embodiment, the queuing device 3 includes a receiving member 31, the receiving member 31 is connected to one end of the lower screen 23, which is inclined downwards, the receiving member 31 is provided with a V-shaped groove, one end of the V-shaped groove is used for receiving the material of the lower screen 23, one end of the detecting channel is provided with an input port for receiving the material output from the other end of the V-shaped groove, and the other end of the detecting channel is communicated with the feeding channel 101. The queuing device 3 mainly uses a V-shaped groove to queue the materials. In other embodiments, the queuing device 3 may also adopt other suitable structures, and is not limited to the above-mentioned embodiments, and may be configured by those skilled in the art according to the actual situation.

In the embodiment, in order to facilitate the charging of the raw material into the screening box 21, a conveyor 8 is provided to transport the raw material to the upper side of the upper screen 22.

In an embodiment, the air supply and control device 6 includes a compressed air source 61 and solenoid valves 62 connected to the air blowing members 300 in a one-to-one correspondence manner, the compressed air source 61 supplies air to the air blowing members 300 through the solenoid valves 62, and the solenoid valves 62 are electrically connected to the control host 7 and controlled by the control host 7. The control host 7 can specifically adopt a PLC industrial personal computer, an industrial personal computer and the like.

In the embodiment, the metal sorting machine is provided with three groups of queuing devices 3, metal detection devices 4 and sorting execution devices 5, so that three paths of materials are sorted in parallel. It is envisioned that in other embodiments, only one, two, or more than three material sortings may be provided.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A sort actuator, comprising:

the feeding part (100) is provided with a feeding channel (101), the feeding channel (101) is provided with a discharging hole (102), and the discharging hole (102) is arranged downwards;

the sorting box (200) is provided with at least two sorting boxes (200) and is arranged around a vertical central axis (103) of the discharge port (102), the sorting boxes (200) are positioned on the lower side of the discharge port (102), the sorting boxes (200) are provided with sorting chambers (201), and the upper ends of the sorting chambers (201) are provided with receiving openings (202);

air blowing piece (300), set up at least two and with letter sorting case (200) one-to-one, air blowing piece (300) are located the upside of letter sorting case (200), air blowing piece (300) are provided with air blowing channel (301), air blowing channel (301) are configured with air blowing opening (302) that are used for blowing out gas, air blowing opening (302) are located the downside of discharge gate (102), air blowing opening (302) orientation vertical axis (103) and center on vertical axis (103) arrange, air blowing opening (302) orientation corresponds letter sorting case (200).

2. Sorting execution device according to claim 1, further comprising a central chamber (400), the sorting bin (200) surrounding the periphery of the central chamber (400), the central chamber (400) being provided with an upwardly facing opening opposite the outfeed opening (102).

3. The sorting execution device according to claim 1, wherein the air blowing opening (302) faces obliquely downward and is arranged opposite to the corresponding material receiving opening (202).

4. Sorting execution device according to claim 3, characterized in that the material receiving opening (202) is directed obliquely upwards.

5. The sorting execution device according to claim 1, characterized by further comprising collecting boxes (500) corresponding to the sorting boxes (200) in a one-to-one manner, wherein a connecting pipeline (600) is connected between each collecting box (500) and the corresponding sorting box (200), the connecting pipeline (600) is communicated with the sorting chamber (201) and the inner cavity of the collecting box (500), and materials in the sorting boxes (200) can enter the collecting boxes (500) through the connecting pipeline (600).

6. Sorting execution device according to claim 5, characterized in that the end of the connecting line (600) close to the collecting bin (500) is connected with a suction line (700), and the suction line (700) is connected with a suction device (800).

7. Sorting execution device according to claim 1, characterized in that the infeed section (100) comprises a mounting frame (110) and a feed pipe (120), the blow-off element (300) being mounted to the mounting frame (110), the feed pipe (120) being connected to the mounting frame (110).

8. Metal sorting machine, characterized by the fact that it has a sorting execution device according to any of claims 1 to 7.

9. A metal separator, comprising:

a frame (1);

the screening device (2) is arranged on the rack (1), and the screening device (2) is used for screening materials in a preset particle size range;

the queuing device (3) is arranged on the rack (1), and the queuing device (3) is used for arranging the materials screened by the screening device (2) into a linear queue;

the metal detection device (4) is arranged on the rack (1), the metal detection device (4) is provided with a detection material channel used for receiving the materials of the queuing device (3), and the metal detection device (4) is used for detecting the metal types of the materials passing through the detection material channel;

the sorting execution device (5) of any one of claims 1 to 7, the sorting execution device (5) being arranged on the rack (1), the feed channel (101) being in communication with a detection channel;

a gas supply and control device (6) connected to the blowing member (300) to supply compressed gas;

and the control host (7) is electrically connected with the metal detection device (4) and the gas supply and control device (6).

10. The metal separator according to claim 9, characterized in that said screening device (2) comprises a screening box (21), an upper screen (22), a lower screen (23) and a vibrator (24); the screening box (21) is arranged on the rack (1), the upper screen (22) and the lower screen (23) are arranged on the screening box (21) and divide the screening box (21) into a feeding cavity, a middle feeding cavity and a discharging cavity, the mesh size of the upper screen (22) is larger than that of the lower screen (23), the lower screen (23) is obliquely arranged relative to the horizontal direction, one downward inclined end of the lower screen (23) is arranged corresponding to the input side of the queuing device (3), and the vibrator (24) is arranged on the screening box (21) and used for enabling the upper screen (22) and the lower screen (23) to vibrate;

the queuing device (3) comprises a material receiving part (31), the material receiving part (31) is connected with one end, downwards inclined, of the lower screen (23), a V-shaped groove is formed in the material receiving part (31), one end of the V-shaped groove is used for receiving materials of the lower screen (23), one end of the detection material channel is provided with an input port used for receiving the materials output by the other end of the V-shaped groove, and the other end of the detection material channel is communicated with the feeding channel (101);

air feed and controlling means (6) including compressed air source (61) and with blow solenoid valve (62) that piece (300) one-to-one is connected, compressed air source (61) pass through solenoid valve (62) to blow piece (300) air feed, solenoid valve (62) with control host (7) electric connection.

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