CN115547740A - One-time and two-time fusion solid-sealed polar pole electricity taking device - Google Patents

Abstract

The invention relates to the technical field of medium-voltage switch equipment, in particular to a secondary fusion solid-sealed polar pole electricity taking device which comprises a first insulating shell and a second insulating shell, wherein arc-shaped inserting strips are symmetrically and fixedly installed at the lower end part of the first insulating shell, inner grooves are formed in the side walls of the two arc-shaped inserting strips, first springs are fixedly installed in the inner walls of the two inner grooves, wedge-shaped blocks are fixedly installed at one ends, far away from the inner walls of the inner grooves, of the two first springs, an arc-shaped groove is formed in the upper end part of the second insulating shell, limiting grooves are symmetrically formed in the inner walls of the arc-shaped grooves, an electricity taking mechanism comprises a fixing cover, the fixing cover is fixedly connected with a movable end cover plate, a wedge-shaped circular groove is formed in the upper end part of the fixing cover, sliding grooves are symmetrically formed in the fixing cover, after a screw rod drives a swinging rod to move to the inside of the wedge-shaped circular groove, the upper ends of the two swinging rods are under the action of extrusion force, at the moment, the two clamping blocks loosen a fixing plate, and reset is completed, so that electricity taking and power-off operations of the device are quick and convenient when the device is used.

Description

One-time and two-time fusion solid-sealed polar pole electricity taking device

Technical Field

The invention relates to the technical field of medium-voltage switch equipment, in particular to a primary and secondary fusion solid-sealed polar pole electricity taking device.

Background

The solid-sealed polar pole is an independent component formed by packaging a vacuum arc-extinguishing chamber or a vacuum arc-extinguishing chamber, a conductive connection and/or a terminal with a solid insulating material.

However, in the secondary power supply process of the existing switch, the power supply equipment is added outside the switch or an independent voltage transformer is added to meet the requirement of power supply, so that a circuit needs to be added, the switch is easy to check or overhaul in a certain period to replace a new power supply, and the power taking and breaking effects of the solid-sealed pole power taking device are poor, and the operation convenience is poor.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a secondary fusion embedded pole column electricity taking device.

In order to solve the technical problems, the invention provides the following technical scheme:

the secondary fusion solid-sealed polar pole electricity taking device comprises a first insulating shell and a second insulating shell, wherein arc-shaped inserting strips are symmetrically and fixedly installed at the lower end part of the first insulating shell, inner grooves are formed in the side walls of the two arc-shaped inserting strips, first springs are fixedly installed in the inner walls of the two inner grooves, wedge-shaped blocks are fixedly installed at one ends, far away from the inner walls of the inner grooves, of the two first springs, an arc-shaped groove is formed in the upper end part of the second insulating shell, limiting grooves are symmetrically formed in the inner walls of the arc-shaped groove, and a top cover plate and a movable end cover plate are respectively arranged in the second insulating shell and the first insulating shell;

the surfaces of the first insulating shell and the second insulating shell are fixedly sleeved with a protection mechanism;

the protection mechanism comprises first fixing rings, the two first fixing rings are fixedly sleeved on a first insulating shell and a second insulating shell respectively, and first annular grooves are formed in the ends, away from each other, of the two first fixing rings;

the upper end part of the movable end cover plate is fixedly provided with a power taking mechanism;

the electricity taking mechanism comprises a fixed cover, the fixed cover is fixedly connected with a movable end cover plate, a wedge-shaped circular groove is formed in the upper end of the fixed cover, and sliding grooves are symmetrically formed in the fixed cover.

Preferably, two all seted up the spacing ring channel in the first ring channel inner wall, two the inside equal slidable mounting of spacing ring channel has the second spacing ring, two equal fixed mounting has flexible protection casing, two on the lateral wall of one side that the second spacing ring deviates from mutually the flexible protection casing is established in two first ring channels in sliding respectively.

Preferably, two equal fixed mounting has the snap ring on the flexible protection casing keeps away from one end of second spacing ring, first insulating casing and second insulating casing all fix the cover on the surface and are equipped with the solid fixed ring of second, two first solid fixed ring is located between the solid fixed ring of two seconds.

Preferably, two clamping grooves are formed in the opposite ends of the second fixing rings, and the clamping rings are matched with the two clamping grooves respectively.

Preferably, a screw rod is slidably mounted inside the wedge-shaped circular groove, an internal thread ring is mounted on the surface of the screw rod in a threaded manner, and two lifting blocks are fixedly mounted at the lower end of the screw rod.

Preferably, the inside of the two lifting blocks is symmetrically and fixedly provided with sliding strips, the two sliding strips are respectively arranged in the two sliding grooves in a sliding manner, and a swinging rod is rotatably arranged between the two lifting blocks.

Preferably, the lower end parts of the two oscillating rods are fixedly provided with clamping blocks, the opposite ends of the two oscillating rods are fixedly provided with side blocks, and the opposite ends of the side blocks are fixedly provided with fixing columns.

Preferably, the two opposite ends of the fixing column are fixedly provided with connecting discs, and a second spring is fixedly arranged between the connecting discs.

Preferably, the top cover plate and the movable cover plate are respectively internally provided with a static conducting rod and a movable conducting rod, and the upper end part of the movable conducting rod is fixedly provided with a fixed disk.

Preferably, the surface of the static conductive rod is sleeved with a corrugated pipe, and the corrugated pipe is located inside the second insulating shell.

Compared with the prior art, the invention can achieve the following beneficial effects:

firstly, the lifting block is moved to drive two sliding strips fixed with the lifting block to respectively slide in the sliding groove, meanwhile, the lifting block is also used for driving the swinging rod and the clamping block which are rotationally connected with the lifting block to move along with the lifting block, when the clamping block is contacted with the fixed disk, the two clamping blocks push the fixed disk downwards to move, the fixed disk pushes the movable conducting rod to be contacted with the static conducting rod, so that the electricity taking operation is completed, when the clamping block continuously moves downwards, the clamping block slightly overturns relatively, the fixed disk is clamped by the two clamping blocks, the screw rod can move upwards at the moment, the fixed disk is driven to move upwards under the movement of the screw rod, the fixed disk drives the movable conducting rod to move, so that the movable conducting rod is separated from the static conducting rod, the electric arc is generated at the moment, the electric arc is extinguished by the first insulating shell and the second insulating shell, and after the screw rod drives the swinging rod to move into the wedge-shaped circular groove, the upper ends of the two swinging rods are acted by extrusion force, the fixed disk is loosened to complete resetting, so that the electricity taking and the device can be quickly and conveniently operated when in use;

secondly, when the wedge block is contacted with the second insulating shell, the wedge block is under the action of extrusion force, the wedge block is driven to slide in the inner groove under the action of the extrusion force, the wedge block extrudes the first spring to deform at the moment, the arc-shaped inserting strip also immerses into the arc-shaped groove when the wedge block is immersed into the inner groove, and when the wedge block moves into the limiting groove, the first spring restores to deform at the moment so as to eject the wedge block into the limiting groove to complete clamping, so that the device is more convenient and labor-saving to install and disassemble when in use;

thirdly, the second limiting ring fixed with the telescopic protective cover is driven to slide in the limiting ring groove along with the telescopic protective cover under the movement of the telescopic protective cover, when the two second limiting rings slide to the top in the two limiting ring grooves respectively, the telescopic protective cover is driven to deform under the pulling of the clamping ring, and the two clamping rings can be clamped in the clamping grooves at the moment, so that the protection operation on the first insulating shell and the second insulating shell is completed, the protection effect on the first insulating shell and the second insulating shell is better when the device is used, and the service life of the device is prolonged;

fourth, the accessible rotates the internal thread ring during use, can control the tensile length of screw rod under the rotation of internal thread ring, because screw rod accessible swinging arms and clamp splice carry out the centre gripping to the fixed disk for this equipment can effectively be adjusted the position of moving the conducting rod when using, has further strengthened the electricity-getting effect.

Drawings

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

FIG. 2 is a schematic perspective exploded view of the present invention;

FIG. 3 is a schematic view of the bellows connection explosion structure of the present invention;

FIG. 4 is a schematic view of the fixing cover structure of the present invention;

FIG. 5 is a schematic view of a sway bar linkage of the present invention;

FIG. 6 is a schematic view of the connecting explosion structure of the lifting block of the present invention;

FIG. 7 is a schematic view of an exploded configuration of the arcuate slip joint of the present invention;

fig. 8 is a schematic view of the first fixing ring according to the present invention in an exploded configuration.

Wherein: 11. a first insulating housing; 12. a second insulating housing; 13. arc-shaped cuttings; 14. an inner tank; 15. a first spring; 16. a wedge block; 17. an arc-shaped slot; 18. a limiting groove; 21. a top cover plate; 22. a movable end cover plate; 23. a static conductive rod; 24. a movable conductive rod; 25. fixing the disc; 26. a bellows; 31. a first retaining ring; 32. a first annular groove; 33. a limiting annular groove; 34. a second stop collar; 35. a telescopic protective cover; 36. a snap ring; 37. a second fixing ring; 38. a card slot; 41. a fixed cover; 42. a wedge-shaped circular groove; 43. a chute; 44. a screw; 45. an internally threaded ring; 46. a lifting block; 47. a slide bar; 51. a swing lever; 52. a clamping block; 53. a side block; 54. fixing the column; 55. connecting the disc; 56. a second spring.

Detailed Description

The present invention will be further described with reference to specific examples, but the following examples are only preferred embodiments of the present invention, and not all embodiments of the present invention are intended to be included in the scope of the present invention. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental procedures in the following examples were carried out in a conventional manner unless otherwise specified, and materials, reagents and the like used in the following examples were commercially available unless otherwise specified.

As shown in fig. 1 to 8, the primary fusion solid-sealed pole electricity-taking device of the invention comprises a first insulating shell 11 and a second insulating shell 12, wherein arc-shaped inserting strips 13 are symmetrically and fixedly installed at the lower end of the first insulating shell 11, inner grooves 14 are respectively formed in the side walls of the two arc-shaped inserting strips 13, first springs 15 are respectively and fixedly installed in the inner walls of the two inner grooves 14, wedge-shaped blocks 16 are respectively and fixedly installed at the ends of the two first springs 15 far away from the inner walls of the inner grooves 14, an arc-shaped groove 17 is formed in the upper end of the second insulating shell 12, and limiting grooves 18 are symmetrically formed in the inner walls of the arc-shaped grooves 17.

When the corrugated pipe is used, the two arc-shaped inserting strips 13 can be firstly inserted into the two arc-shaped grooves 17 respectively, at the moment, the arc-shaped inserting strips 13 drive the two first springs 15 and the wedge-shaped block 16 which are fixed with the arc-shaped inserting strips to move along with the arc-shaped inserting strips, when the wedge-shaped block 16 is contacted with the second insulating shell 12, the wedge-shaped block 16 is under the action of extrusion force and drives the wedge-shaped block 16 to slide in the inner groove 14 under the action of the extrusion force, at the moment, the wedge-shaped block 16 extrudes the first springs 15 to deform along with the first springs, when the wedge-shaped block 16 is immersed in the inner groove 14, the arc-shaped inserting strips 13 are immersed in the arc-shaped grooves 17 along with the wedge-shaped inserting strips, when the wedge-shaped block 16 moves into the limiting groove 18, at the moment, the first springs 15 restore to deform so as to eject the wedge-shaped block 16 into the limiting groove 18 to complete clamping, so that the equipment is more convenient and labor-saving in use in installation and disassembly, a top end cover plate 21 and a movable end cover plate 22 are arranged in the second insulating shell 12 and a fixed corrugated pipe 26, and a fixed corrugated pipe 23 and a movable end cover 26 are arranged in the top end plate 21 and a movable end cover 22 respectively.

In some embodiments, the present invention further comprises a protection mechanism fixedly sleeved on the surface of each of the first insulating housing 11 and the second insulating housing 12.

Specifically, protection machanism includes first solid fixed ring 31, two first solid fixed ring 31 are fixed the cover respectively and are established on first insulating housing 11 and second insulating housing 12, one that two first solid fixed ring 31 deviate from mutually has all been seted up first ring channel 32, spacing ring channel 33 has all been seted up in two first ring channel 32 inner walls, two inside equal slidable mounting of spacing ring channel 33 has second spacing ring 34, equal fixed mounting has flexible protection casing 35 on the lateral wall of one side that two second spacing ring 34 deviate from mutually, two flexible protection casings 35 slide respectively and establish in two first ring channels 32, two flexible protection casings 35 keep away from equal fixed mounting on the one end of second spacing ring 34 has snap ring 36, first insulating housing 11 and second insulating housing 12 all fixed cover on the surface is equipped with solid fixed ring 37 of second, two first solid fixed ring 31 are located between the solid fixed ring 37 of two second, gu the relative serving of two solid fixed ring 37 of second has all seted up the draw-in groove 38, two snap ring 36 respectively with two draw-in groove 38 looks adaptations.

After the equipment is installed, at the moment, the two clamping rings 36 can be pulled relatively, the two telescopic protective covers 35 fixed with the two clamping rings 36 are driven to interact with each other inside the first annular groove 32 under the movement of the two clamping rings 36, at the moment, the second limiting rings 34 fixed with the telescopic protective covers 35 are driven to slide inside the limiting annular grooves 33 along with the movement of the two clamping rings 36, the two second limiting rings 34 slide to the topmost parts in the two limiting annular grooves 33 respectively, at the moment, the telescopic protective covers 35 are driven to deform under the pulling of the clamping rings 36, at the moment, the two clamping rings 36 can be clamped in the clamping grooves 38, so that the protection operation on the first insulating shell 11 and the second insulating shell 12 is completed, the protection effect on the first insulating shell 11 and the second insulating shell 12 is better when the equipment is used, and the service life of the equipment is prolonged.

Meanwhile, the invention further fixedly installs a power taking mechanism at the upper end part of the movable end cover plate 22, and specifically, the power taking mechanism comprises a fixed cover 41, the fixed cover 41 is fixedly connected with the movable end cover plate 22, the upper end part of the fixed cover 41 is provided with a wedge-shaped circular groove 42, sliding grooves 43 are symmetrically formed in the fixed cover 41, a screw 44 is slidably installed in the wedge-shaped circular groove 42, an internal thread ring 45 is installed on the surface of the screw 44 in a threaded manner, two lifting blocks 46 are fixedly installed at the lower end part of the screw 44, sliding strips 47 are symmetrically and fixedly installed in the two lifting blocks 46, the two sliding strips 47 are respectively slidably installed in the two sliding grooves 43, an oscillating rod 51 is rotatably installed between the two lifting blocks 46, clamping blocks 52 are fixedly installed at the lower end parts of the two oscillating rods 51, side blocks 53 are fixedly installed at the opposite ends of the two oscillating rods 51, fixed columns 54 are fixedly installed at the opposite ends of the two side blocks 53, connecting discs 55 are fixedly installed at the opposite ends of the two fixed columns 54, and a second spring 56 is fixedly installed between the two connecting discs 55.

When the electric power taking device is used, the internal thread ring 45 rotates to the upper part on the screw rod 44, then the screw rod 44 is pressed downwards, the lifting block 46 fixed with the screw rod 44 is driven to move downwards in the fixed cover 41 along with the screw rod, the two sliding strips 47 fixed with the lifting block 46 are driven to slide in the sliding groove 43 respectively under the movement of the lifting block 46, meanwhile, the lifting block 46 drives the swinging rod 51 and the clamping block 52 which are connected with the lifting block to move along with the swinging rod, when the clamping block 52 is contacted with the fixed disk 25, the fixed disk 25 is driven to move downwards by the two clamping blocks 52, and the fixed disk 25 drives the movable conducting rod 24 to be contacted with the static conducting rod 23, so that the electric power taking operation is completed;

when the clamping blocks 52 continuously move downwards, the clamping blocks 52 slightly turn over relatively, at this time, the two clamping blocks 52 clamp the fixed disk 25, at this time, the screw 44 can move upwards, the fixed disk 25 is driven to move upwards under the movement of the screw 44, at this time, the fixed disk 25 drives the movable conducting rod 24 to move, so that the movable conducting rod 24 is separated from the static conducting rod 23, at this time, an electric arc is generated, the electric arc is extinguished inside the first insulating housing 11 and the second insulating housing 12, after the screw 44 drives the swinging rod 51 to move into the wedge-shaped circular groove 42, at this time, the upper ends of the two swinging rods 51 are subjected to the action of extrusion force, at this time, the two clamping blocks 52 loosen the fixed disk 25, the resetting is completed, so that the power-on and power-off operations of the device are fast and convenient in use, the stretching length of the screw 44 can be controlled under the rotation of the internal thread ring 45, and the screw 44 can clamp the fixed disk 25 through the swinging rods 51 and the clamping blocks 52, so that the position of the movable conducting rod 24 can be effectively adjusted when the device is used, and the power-on effect is further enhanced.

The working principle is as follows:

firstly, when the device is used, the two arc-shaped inserting strips 13 can be respectively inserted into the two arc-shaped grooves 17, at the moment, the arc-shaped inserting strips 13 drive the two first springs 15 and the wedge-shaped block 16 which are fixed with the arc-shaped inserting strips to move along with the arc-shaped inserting strips, when the wedge-shaped block 16 is contacted with the second insulating shell 12, the wedge-shaped block 16 is under the action of extrusion force, the wedge-shaped block 16 is driven to slide in the inner groove 14 under the action of the extrusion force, at the moment, the wedge-shaped block 16 extrudes the first springs 15 to deform along with the first springs, when the wedge-shaped block 16 is immersed in the inner groove 14, the arc-shaped inserting strips 13 are also immersed in the arc-shaped grooves 17 along with the second springs, when the wedge-shaped block 16 moves into the limiting groove 18, at the moment, the first springs 15 restore to deform so that the wedge-shaped block 16 is ejected into the limiting groove 18 to complete clamping, and the device is convenient and labor-saving to install and disassemble when in use;

secondly, after the equipment is installed, the two clamping rings 36 can be pulled relatively at the moment, the two clamping rings 36 are moved to respectively drive the two telescopic protective covers 35 fixed with the two clamping rings to interact in the first annular groove 32, the telescopic protective covers 35 are moved to drive the second limiting rings 34 fixed with the telescopic protective covers to slide in the limiting annular grooves 33, the two second limiting rings 34 slide to the top in the two limiting annular grooves 33 respectively, the telescopic protective covers 35 are driven to deform under the pulling of the clamping rings 36, and the two clamping rings 36 can be clamped in the clamping grooves 38 at the moment, so that the protection operation on the first insulating shell 11 and the second insulating shell 12 is completed, the protection effect on the first insulating shell 11 and the second insulating shell 12 is better when the equipment is used, and the service life of the equipment is prolonged;

third, the internal thread ring 45 is rotated to the upper side on the screw 44, then the screw 44 is pressed downwards, at this time, the screw 44 moves to drive the lifting block 46 fixed with the screw to move downwards in the fixing cover 41, at this time, the lifting block 46 moves to drive the two sliding strips 47 fixed with the screw to respectively slide in the sliding groove 43, at the same time, the lifting block 46 drives the swing rod 51 and the clamping block 52 connected with the lifting block to move downwards, when the clamping block 52 is contacted with the fixed disk 25, the two clamping blocks 52 drive the fixed disk 25 to move downwards, at this time, the fixed disk 25 drives the movable conductive rod 24 to be contacted with the static conductive rod 23, so as to finish the electricity taking operation, when the clamping block 52 continuously moves downwards, the clamping block 52 slightly turns over relatively, at this time, the two clamping blocks 52 clamp the fixed disk 25, at this time, the screw 44 can move upwards, at this time, the fixed disk 25 is driven to move upwards under the movement of the screw 44, the fixed disk 25 drives the movable conductive rod 24 to move, so that the movable conductive rod 24 is separated from the fixed disk 25, at this time, the electric arc extinguishing device is pressed by the electric arc, and the electric arc pushing device is released, at this time, the electric arc pushing device 11, and the electric arc extinguishing device is used conveniently, and the electric arc extinguishing device 11 is released, at this time, when the electric arc extinguishing device 11 is used;

fourthly, the internal thread ring 45 is rotated, the stretching length of the screw rod 44 can be controlled under the rotation of the internal thread ring 45, and the fixed disc 25 can be clamped by the screw rod 44 through the swinging rod 51 and the clamping block 52, so that the position of the movable conducting rod 24 can be effectively adjusted when the device is used, and the electricity taking effect is further enhanced.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, 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. The secondary fusion solid-sealed polar pole electricity taking device comprises a first insulating shell (11) and a second insulating shell (12), and is characterized in that arc-shaped inserting strips (13) are symmetrically and fixedly installed at the lower end of the first insulating shell (11), inner grooves (14) are formed in the side walls of the two arc-shaped inserting strips (13), first springs (15) are fixedly installed in the inner walls of the two inner grooves (14), wedge-shaped blocks (16) are fixedly installed on the ends, far away from the inner walls of the inner grooves (14), of the two first springs (15), an arc-shaped groove (17) is formed in the upper end of the second insulating shell (12), limiting grooves (18) are symmetrically formed in the inner walls of the arc-shaped groove (17), and a top cover plate (21) and a movable end cover plate (22) are respectively arranged in the second insulating shell (12) and the first insulating shell (11);

the surfaces of the first insulating shell (11) and the second insulating shell (12) are fixedly sleeved with a protection mechanism;

the protection mechanism comprises first fixing rings (31), the two first fixing rings (31) are fixedly sleeved on the first insulating shell (11) and the second insulating shell (12) respectively, and the ends, which are opposite to each other, of the two first fixing rings (31) are provided with first annular grooves (32);

the upper end part of the movable end cover plate (22) is fixedly provided with a power taking mechanism;

get electric mechanism including fixed cover (41), fixed cover (41) and move end cover board (22) fixed connection, wedge circular slot (42) have been seted up to fixed cover (41) upper end, spout (43) have been seted up to fixed cover (41) inside symmetry.

2. The secondary fusion embedded pole electricity taking device according to claim 1, wherein the inner walls of the two first annular grooves (32) are respectively provided with a limiting annular groove (33), the two limiting annular grooves (33) are respectively and slidably provided with a second limiting ring (34), the two second limiting rings (34) are respectively and fixedly provided with a telescopic protective cover (35) on the side wall of one side deviating from the side wall, and the two telescopic protective covers (35) are respectively and slidably arranged in the two first annular grooves (32).

3. The secondary fusion embedded pole electricity taking device according to claim 2, wherein two telescopic shields (35) are fixedly provided with snap rings (36) at one end far away from the second limit ring (34), the first insulating housing (11) and the second insulating housing (12) are fixedly provided with second fixing rings (37) on the surface, and the first fixing rings (31) are located between the two second fixing rings (37).

4. The secondary fusion embedded pole electricity taking device according to claim 3, wherein the two second fixing rings (37) are provided with clamping grooves (38) at opposite ends, and the two clamping rings (36) are respectively matched with the two clamping grooves (38).

5. The secondary fusion embedded pole column electricity taking device according to claim 1, wherein a screw rod (44) is slidably mounted inside the wedge-shaped circular groove (42), an internal thread ring (45) is mounted on the surface of the screw rod (44) in a threaded manner, and two lifting blocks (46) are fixedly mounted at the lower end of the screw rod (44).

6. The secondary fusion embedded pole electricity taking device according to claim 5, wherein sliding strips (47) are symmetrically and fixedly installed inside the two lifting blocks (46), the two sliding strips (47) are respectively arranged in the two sliding grooves (43) in a sliding manner, and a swinging rod (51) is rotatably installed between the two lifting blocks (46).

7. The device for taking electricity as claimed in claim 6, wherein the lower ends of the two swing rods (51) are fixedly provided with clamping blocks (52), the opposite ends of the two swing rods (51) are fixedly provided with side blocks (53), and the opposite ends of the two side blocks (53) are fixedly provided with fixing columns (54).

8. The device for taking electricity as claimed in claim 7, wherein connecting discs (55) are fixedly mounted at opposite ends of the two fixing columns (54), and a second spring (56) is fixedly mounted between the two connecting discs (55).

9. The device for taking electricity as claimed in claim 1, wherein the top cover plate (21) and the movable cover plate (22) are respectively provided with a static conducting rod (23) and a movable conducting rod (24), and the upper end of the movable conducting rod (24) is fixedly provided with a fixed disk (25).

10. The device for taking electricity as claimed in claim 9, wherein the corrugated tube (26) is sleeved on the surface of the static conducting rod (23), and the corrugated tube (26) is located inside the second insulating housing (12).

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