Rotary creeping formwork frame body supporting device

Abstract

The utility model relates to a rotary creeping formwork frame body supporting device which comprises a frame body and a wall-attached hanging seat, a fixed hanging piece or a rotary hanging piece is arranged on the frame body, and a rotary bearing piece corresponding to the fixed hanging piece or a fixed bearing piece corresponding to the rotary hanging piece is arranged on the wall-attached hanging seat. The fixed hanging piece can drive the rotary bearing piece to rotate until the fixed hanging piece is separated from the rotary bearing piece when climbing on the frame body, the rotary bearing piece can rotate after the fixed hanging piece is separated from the rotary bearing piece, and the fixed hanging piece can be hung on the rotary bearing piece; the fixed bearing piece can drive the rotary hanging piece to rotate until the fixed bearing piece is separated from the rotary hanging piece when climbing on the frame body, and the rotary hanging piece can rotate and is hung on the fixed bearing piece after the fixed bearing piece is separated from the rotary hanging piece. The wall-attached hanging seat has the beneficial effects that the frame body can be automatically hung and supported on the wall-attached hanging seat, the labor cost is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction equipment, and in particular relates to a rotary climbing formwork frame supporting device. Background Art

[0002] With the continuous development of society, the number of high-rise and super-high-rise buildings continues to increase. Since hydraulic climbing formwork has the ability to climb by itself, it has been widely used in the construction of high-rise and super-high-rise buildings in recent years. The hydraulic climbing formwork is a wall-mounted self-climbing system. It completes the pouring of the first layer of concrete and the embedding of the guide rail and the wall-mounted seat at the same time. The guide rail and the frame are alternately lifted by the hydraulic mechanism to realize the formwork and pouring process of the entire building. There is no need to set up high-rise scaffolding, which is easy to use.

[0003] In the existing hydraulic climbing formwork construction process, after the frame is lifted into place, it is necessary to insert a load-bearing pin between the frame and the wall mount, so that the frame is hung on the load-bearing pin, thereby achieving stable support of the frame on the wall mount to meet subsequent construction requirements. However, most of the existing load-bearing pins are still realized by manual insertion, which is inconvenient, time-consuming, labor-intensive, and inefficient. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a rotating climbing formwork frame supporting device, which can realize automatic hanging and supporting of the frame on the wall hanging bracket, reduce labor costs and improve work efficiency.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A rotating climbing formwork frame supporting device comprises a frame and a wall-mounted mount, wherein the frame is provided with a fixed mount or a rotating mount, and the wall-mounted mount is provided with a rotating load-bearing member corresponding to the fixed mount or a fixed load-bearing member corresponding to the rotating mount, wherein the fixed mount can drive the rotating load-bearing member to rotate when the frame is climbing up until the fixed mount is separated from the rotating load-bearing member, after which the fixed mount is separated from the rotating load-bearing member, the rotating load-bearing member can rotate and the fixed mount can be mounted on the rotating load-bearing member, wherein the fixed load-bearing member can drive the rotating mount to rotate when the frame is climbing up until the fixed load-bearing member is separated from the rotating mount, after which the fixed load-bearing member is separated from the rotating mount, the rotating mount can rotate and be mounted on the fixed load-bearing member.

[0007] Furthermore, ear plates are provided on both sides of the wall-mounted mounting, and the rotatable load-bearing member includes a hook, a rotating shaft, a limit shaft and a torsion spring. Two hooks are provided and the hooks are in an L-shaped structure. The middle parts of the two hooks are rotatably connected to the wall-mounted mounting between the two ear plates through the rotating shaft. The torsion spring is sleeved on the rotating shaft. The two ends of the torsion spring are respectively connected to the hook and the wall-mounted mounting. The limit shaft is fixed to the wall-mounted mounting between the two hooks. One end of the two hooks passes through the two ear plates respectively, and the other ends of the two hooks can be abutted against the limit shaft. The fixed hanging part can drive the hook to rotate until the fixed hanging part is separated from the hook. After the fixed hanging part is separated from the hook, the hook can rotate and the fixed hanging part can be hung on the hook.

[0008] Furthermore, the fixed hanging component includes a hanging plate, which is upright on both sides of the frame and the two hanging plates correspond to the two hooks one by one. One end of the hanging plate is fixed to the frame, and the top of the other end of the hanging plate can slide in contact with the bottom surface of one end of the hook passing through the ear plate. The bottom of the other end of the hanging plate is provided with a recess that is adapted to the shape of the hook, and the hanging plate can be hung on the end of the hook passing through the ear plate through the recess.

[0009] Furthermore, the rotary climbing formwork frame support device also includes a first hanging detection component, which includes a first sensor, a second sensor, a third sensor, a limit plate and an electrical control system. The first sensor and the second sensor are arranged on the hanging plate and are respectively located above and below the recess. The third sensor is arranged on the hanging plate between the first sensor and the second sensor. The limit plate is arranged on the ear plate above the fixed hanging component. The first sensor corresponds to the limit plate, the second sensor and the third sensor both correspond to the hook, and the first sensor, the second sensor, and the third sensor are all electrically connected to the electrical control system.

[0010] Furthermore, a rotatable hanging part is arranged on both sides of the frame, and the rotatable hanging part includes a hanging plate, a hook, a fixed shaft, a limit block and a tension spring. The hanging plate is vertically fixed on the frame, the fixed shaft is passed through the hanging plate, the hooks are arranged on both sides of the hanging plate and are rotatably sleeved on the fixed shaft, the limit block is fixed to the hanging plate below the hook, one end of the hook can abut against the limit block, and the other end of the hook cooperates with the fixed load-bearing member, both ends of the tension spring are respectively connected with the hook and the limit block, the fixed load-bearing member can drive the hook to rotate until the fixed load-bearing member is separated from the hook, and after the fixed load-bearing member is separated from the hook, the hook can rotate and be hung on the fixed load-bearing member.

[0011] Furthermore, the fixed load-bearing component includes a load-bearing pin, which is fixedly inserted into the wall-mounted bracket. The top of one end of the hook that cooperates with the fixed load-bearing component can be in sliding contact with the load-bearing pin. The bottom of one end of the hook that cooperates with the fixed load-bearing component is provided with a recess that is adapted to the shape of the load-bearing pin, and the hook can be hung on the load-bearing pin through the recess.

[0012] Furthermore, the rotating climbing formwork frame support device also includes a second hanging detection component, the second hanging detection component includes a fourth sensor and an electrical control system, the fourth sensor is arranged at the bottom of the limit block and corresponds to the hook, and the fourth sensor is electrically connected to the electrical control system.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model improves the existing frame and wall mount, adds a fixed hanging part or a rotating hanging part on the frame, and correspondingly adds a rotating load-bearing part or a fixed load-bearing part on the wall mount, and then utilizes the cooperation of the fixed hanging part and the rotating load-bearing part or the cooperation of the rotating hanging part and the fixed load-bearing part to realize automatic hanging and support of the frame on the wall mount, avoids manual pinning, reduces labor costs and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of the rotating load-bearing member;

[0017] Figure 3 Another schematic diagram of the overall structure of the utility model;

[0018] Figure 4 for Figure 3 Schematic diagram of the structure of the rotating hanging part.

[0019] In the figure: 1. frame; 2. wall mount; 3. ear plate; 4. hook; 5. rotating shaft; 6. limit shaft; 7. hanging plate; 8. fixed shaft; 9. limit block; 10. load-bearing pin; 11. torsion spring; 12. tension spring; 13. first sensor; 14. second sensor; 15. third sensor; 16. limit plate; 17. fourth sensor. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0021] Embodiment 1

[0022] like Figure 1As shown, this embodiment provides a rotating climbing formwork frame support device, including a frame 1 and a wall mount 2. In order to realize that the frame 1 can be automatically mounted and supported on the wall mount 2 when climbing along the guide rail to the wall mount 2, a fixed mounting part is provided on the frame 1, and a rotating load-bearing part corresponding to the fixed mounting part is provided on the wall mount 2, so that the fixed mounting part can drive the rotating load-bearing part to rotate when the frame 1 climbs up, until the fixed mounting part is separated from the rotating load-bearing part, and after the fixed mounting part is separated from the rotating load-bearing part, the rotating load-bearing part can rotate, and the fixed mounting part can be mounted on the rotating load-bearing part.

[0023] like Figure 2 As shown, ear plates 3 are provided on both sides of the wall-mounted mounting 2, and the rotatable load-bearing member specifically includes a hook 4, a rotating shaft 5, a limiting shaft 6 and a torsion spring 11, wherein two hooks 4 are provided and the hooks 4 are L-shaped structures, and the middle parts of the two hooks 4 are rotatably connected to the wall-mounted mounting 2 between the two ear plates 3 through the rotating shaft 5, the torsion spring is sleeved on the rotating shaft, and both ends of the torsion spring are respectively connected to the hook and the wall-mounted mounting, and the limiting shaft 6 is fixed to the wall-mounted mounting 2 between the two hooks 4, one end of the two hooks 4 passes through the two ear plates 3 respectively, and the other ends of the two hooks 4 can abut against the limiting shaft 6.

[0024] Based on the structure of the above-mentioned rotating load-bearing member, in this embodiment, when the frame 1 climbs up to the wall-mounted mount 2, the frame 1 drives the two hooks 4 to rotate through the fixed hanging member, and the torsion spring 1 also twists, so that the end of the hook 4 passing through the ear plate 3 is stored inside the ear plate 3; as the frame 1 climbs further, the fixed hanging member will be separated from the hook 4, and then the hook 4 can rotate and pass through the ear plate 3 under the torsion of the torsion spring 11, until the hook 4 abuts against the limit shaft 6, and the fixed hanging member can be hung on the end of the hook 4 passing through the ear plate 3. When the fixed hanging member is hung on the hook 4, the limit shaft 6 limits the hook 4 to prevent the hook 4 from rotating and provide support.

[0025] like Figure 1 , Figure 2 As shown, in order to achieve the cooperation between the above-mentioned fixed hanging parts and the rotating load-bearing parts, the fixed hanging parts in this embodiment include hanging plates 7, which are vertically arranged on both sides of the frame 1 and the two hanging plates 7 are matched with the two hooks 4 in a one-to-one correspondence. More specifically, one end of the hanging plate 7 is fixed to the frame 1, and the top of the other end of the hanging plate 7 can slide in contact with the bottom surface of one end of the hook 4 passing through the ear plate 3. The bottom of the other end of the hanging plate 7 is provided with a notch adapted to the shape of the hook 4, and the hanging plate 7 can be hung on the end of the hook 4 passing through the ear plate 3 through the notch. Since the top of the other end of the hanging plate 7 can slide in contact with the bottom surface of one end of the hook 4 passing through the ear plate 3, the frame 1 can push the end of the hook 4 passing through the ear plate 3 upward through the hanging plate 7 during the climbing process, thereby driving the hook 4 to rotate, so that the end of the hook 4 passing through the ear plate 3 is stored inside the ear plate 3.

[0026] Based on the structure of the above-mentioned fixed hanging parts and the rotating load-bearing parts, the working principle of the rotating climbing formwork frame support device in this embodiment is as follows:

[0027] When the frame 1 climbs up to the wall-mounted mount 2 along the guide rail, the hanging plate 7 on the frame 1 will slide in contact with the bottom surface of the end of the hook 4 passing through the ear plate 3, and then the frame 1 climbs up and drives the two hooks 4 to rotate through the hanging plate 7, and the torsion spring 11 twists immediately, so that the ends of the two hooks 4 passing through the ear plate 3 are retracted toward the inner side of the ear plate 3. As the frame 1 climbs further up, the hanging plate 7 will disengage from the hook 4, and then the two hooks 4 will rotate and pass through the ear plate 3 under the torsion of the torsion spring 11 until the hook 4 abuts against the limit shaft 6, and then the frame 1 can drive the hanging plate 7 to move downward, so that the hanging plate 7 is hung with the end of the hook 4 passing through the ear plate 3 through the recess, so that the frame 1 is stably supported on the wall-mounted mount 2.

[0028] In order to ensure that the hanging plate 7 can be hung on the hook 4 accurately and stably, the present embodiment further provides a first hanging detection component for detecting the hanging process. Figure 2 As shown, the first hanging detection component includes a first sensor 13, a second sensor 14, a third sensor 15, a limit plate 16 and an electrical control system. The first sensor 13 and the second sensor 14 are arranged on the hanging plate 7 and are respectively located above and below the recess. The third sensor 14 is arranged on the hanging plate 7 between the first sensor 13 and the second sensor 14. The limit plate 16 is arranged on the ear plate 3 above the fixed hanging component. The first sensor 13, the second sensor 14, and the third sensor 15 are all electrically connected to the electrical control system.

[0029] The first sensor 13, the second sensor 14, and the third sensor 15 can all use proximity switches or laser ranging. When the frame 1 climbs and the second sensor 14 detects the hook 4, the frame 1 continues to climb until the first sensor 13 detects the limit plate 16; when the first sensor 13 detects the limit plate 16, the frame 1 moves down until the third sensor 15 detects whether the hook 4 is in place; if the third sensor 15 detects that the hook 4 is in place, the frame 1 continues to move down until the hanging plate 7 is successfully hung on the hook 4, otherwise the electrical control system issues a shutdown alarm.

[0030] Embodiment 2

[0031] This embodiment provides another type of rotating climbing formwork frame supporting device, which can also realize that when the frame 1 climbs along the guide rail to the wall mounting bracket 2, it can be automatically mounted and supported on the wall mounting bracket 2.

[0032] Specifically, Figure 3As shown, the rotatable climbing formwork frame supporting device in this embodiment includes a frame 1 and a wall mount 2, the frame 1 is provided with a rotatable hanging member, and the wall mount 2 is provided with a fixed load-bearing member corresponding to the rotatable hanging member, so that the fixed load-bearing member can drive the rotatable hanging member to rotate when climbing the frame 1 until the fixed load-bearing member is separated from the rotatable hanging member. After the fixed load-bearing member is separated from the rotatable hanging member, the rotatable hanging member can be rotated and hung on the fixed load-bearing member.

[0033] like Figure 4 As shown, the rotatable hanging parts are arranged on both sides of the frame 1, and the rotatable hanging parts specifically include a hanging plate 7, a hook 4, a fixed shaft 8, a limit block 9 and a tension spring 12, wherein the hanging plate 7 is vertically fixed on the frame 1, the fixed shaft 8 is passed through the hanging plate 7, the hook 4 is arranged on both sides of the hanging plate 7 and is rotatably sleeved on the fixed shaft 8, the limit block 9 is fixed on the hanging plate 7 below the hook 4, one end of the hook 4 can be abutted against the limit block 9, and the other end of the hook 4 cooperates with the fixed load-bearing part, and the two ends of the tension spring 12 are respectively connected with the hook 4 and the limit block 9.

[0034] Based on the structure of the above-mentioned rotating hanging parts, in this embodiment, when the frame 1 climbs up to the wall-mounted hanging seat 2, the wall-mounted hanging seat 2 drives the hook 4 to rotate through the fixed load-bearing part, and the tension spring 12 is stretched, thereby causing the end of the hook 4 that cooperates with the fixed load-bearing part to move in a direction away from the fixed load-bearing part; as the frame 1 climbs further, the fixed load-bearing part will be separated from the hook 4, and then the hook 4 can rotate under the restoring force of the tension spring 12 until it abuts against the limit block 9, and the end of the hook 4 that cooperates with the fixed load-bearing part can be hung on the fixed load-bearing part. When the hook 4 is hung on the fixed load-bearing part, the limit block 9 limits the hook 4 to prevent the hook 4 from rotating and provide support.

[0035] like Figure 3 , Figure 4 As shown, in order to realize the cooperation between the above-mentioned rotating hanging member and the fixed load-bearing member, the fixed load-bearing member in this embodiment includes a load-bearing pin 10, which is fixedly penetrated on the wall-mounted hanging seat 2, and the top of one end of the hook 4 that cooperates with the fixed load-bearing member can slide in contact with the load-bearing pin 10, and the bottom of one end of the hook 4 that cooperates with the fixed load-bearing member is provided with a notch that matches the shape of the load-bearing pin 10, and the hook 4 can be hung on the load-bearing pin 10 through the notch. Since the top of one end of the hook 4 that cooperates with the fixed load-bearing member can slide in contact with the load-bearing pin 10, the frame 1 can push the load-bearing pin 10 upward through the end of the hook 4 that cooperates with the fixed load-bearing member during the climbing process. Since the load-bearing pin 10 is fixed on the wall-mounted hanging seat 2, the load-bearing pin 10 will react to the hook 4, thereby driving the hook 4 to rotate.

[0036] Based on the structure of the above-mentioned rotating hanging member and the fixed load-bearing member, the working principle of the rotating climbing formwork frame support device in this embodiment is as follows:

[0037] When the frame 1 climbs up to the wall mount 2 along the guide rail, the hook 4 on the frame 1 will slide in contact with the load-bearing pin 10, the frame 1 climbs up and pushes the load-bearing pin 10 upward through the hook 4, and the load-bearing pin 10 reacts on the hook 4 and drives the hook 4 to rotate, and the tension spring 12 is immediately stretched, so that the end of the hook 4 that contacts the load-bearing pin 10 moves in the direction away from the load-bearing pin 10, as the frame 1 climbs further, the hook 4 will disengage from the load-bearing pin 10, and then the hook 4 will rotate under the action of the restoring force of the tension spring 12 and abut against the limit block 9, and then the frame 1 can drive the hook 4 to move downward, so that the hook 4 is hung on the load-bearing pin 10 through the recess, so that the frame 1 is stably supported on the wall mount 2.

[0038] In order to ensure that the hook 4 can be accurately and stably hooked on the load-bearing pin 10, the present embodiment further provides a second hooking detection component for detecting the hooking process. Figure 3 As shown, the second hook detection assembly includes a fourth sensor 17 and an electrical control system. The fourth sensor 17 can be a proximity switch or a laser distance measurement. The fourth sensor 17 is arranged at the bottom of the limit block 9 and is electrically connected to the electrical control system.

[0039] During the upward movement of the frame 1, when the hook 4 passes through the load-bearing pin 10, the load-bearing pin 10 drives the hook 4 to rotate, and the fourth sensor 17 detects that the hook 4 leaves, and the frame 1 continues to move upward. The hook 4 reverses under the action of the tension spring 12, and the fourth sensor 17 detects whether the hook 4 is in place. If it is detected that the hook 4 is in place, the frame 1 immediately moves down, and then the hook 4 can be hung on the load-bearing pin 10 through the recess, otherwise the electrical control system will issue a shutdown alarm.

[0040] The utility model uses the above-mentioned two types of rotating climbing formwork frame supporting devices to realize that the frame 1 can be automatically hung and supported on the wall hanging bracket 2 when it climbs along the guide rail to the wall hanging bracket 2, thereby avoiding manual pinning operations and achieving the purpose of reducing labor costs and improving work efficiency.

[0041] Finally, although the above description has shown and described the embodiments of the present invention, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotating climbing formwork frame support device, comprising a frame (1) and a wall mount (2), characterized in that: The frame (1) is provided with a fixed hanging part or a rotating hanging part, and the wall mount (2) is provided with a rotating load-bearing part corresponding to the fixed hanging part or a fixed load-bearing part corresponding to the rotating hanging part. The fixed hanging part can drive the rotating load-bearing part to rotate when the frame (1) is climbed up until the fixed hanging part is separated from the rotating load-bearing part. After the fixed hanging part is separated from the rotating load-bearing part, the rotating load-bearing part can rotate and the fixed hanging part can be hung on the rotating load-bearing part. The fixed load-bearing part can drive the rotating hanging part to rotate when the frame (1) is climbed up until the fixed load-bearing part is separated from the rotating hanging part. After the fixed load-bearing part is separated from the rotating hanging part, the rotating hanging part can rotate and be hung on the fixed load-bearing part.

2. The rotating climbing formwork support device according to claim 1 is characterized in that: Ear plates (3) are provided on both sides of the wall-mounted mounting (2); the rotating load-bearing member comprises a hook (4), a rotating shaft (5), a limiting shaft (6) and a torsion spring (11); two hooks (4) are provided and the hooks (4) are in an L-shaped structure; the middle parts of the two hooks (4) are rotatably connected to the wall-mounted mounting (2) between the two ear plates (3) through the rotating shaft (5); the torsion spring (11) is sleeved on the rotating shaft (5); the two ends of the torsion spring are respectively connected to the hook (4) and the wall-mounted mounting (2); the limiting shaft (6) is fixed to the wall-mounted mounting (2) between the two hooks (4); one end of the two hooks (4) passes through the two ear plates (3) respectively; the other ends of the two hooks (4) can abut against the limiting shaft (6); the fixed hanging member can drive the hook (4) to rotate until the fixed hanging member is separated from the hook (4); after the fixed hanging member is separated from the hook (4), the hook (4) can rotate and the fixed hanging member can be hung on the hook (4).

3. The rotating climbing formwork support device according to claim 2 is characterized in that: The fixed hanging part comprises a hanging plate (7), the hanging plate (7) being vertically arranged on both sides of the frame (1), and the two hanging plates (7) being matched with the two hooks (4) in a one-to-one correspondence, one end of the hanging plate (7) being fixedly connected to the frame (1), the top of the other end of the hanging plate (7) being able to slide in contact with the bottom surface of one end of the hook (4) passing through the ear plate (3), the bottom of the other end of the hanging plate (7) being provided with a notch matching the shape of the hook (4), and the hanging plate (7) being able to be hung on one end of the hook (4) passing through the ear plate (3) through the notch.

4. The rotating climbing formwork support device according to claim 3 is characterized in that: The rotating climbing formwork frame support device also includes a first hanging detection component, which includes a first sensor (13), a second sensor (14), a third sensor (15), a limit plate (16) and an electrical control system. The first sensor (13) and the second sensor (14) are arranged on the hanging plate (7) and are respectively located above and below the notch. The third sensor (15) is arranged on the hanging plate (7) between the first sensor (13) and the second sensor (14). The limit plate (16) is arranged on the ear plate (3) above the fixed hanging part. The first sensor (13) corresponds to the limit plate (16). The second sensor (14) and the third sensor (15) both correspond to the hook (4). The first sensor (13), the second sensor (14) and the third sensor (15) are all electrically connected to the electrical control system.

5. The rotating climbing formwork support device according to claim 1 is characterized in that: The rotatable hanging parts are arranged on both sides of the frame (1), and the rotatable hanging parts include a hanging plate (7), a hook (4), a fixed shaft (8), a limit block (9) and a tension spring (12). The hanging plate (7) is vertically fixed on the frame (1), the fixed shaft (8) is penetrated on the hanging plate (7), the hook (4) is arranged on both sides of the hanging plate (7) and is rotatably sleeved on the fixed shaft (8), the limit block (9) is fixed on the hanging plate (7) below the hook (4), one end of the hook (4) can abut against the limit block (9), and the other end of the hook (4) cooperates with the fixed load-bearing part, and the two ends of the tension spring (12) are respectively connected with the hook (4) and the limit block (9), and the fixed load-bearing part can drive the hook (4) to rotate until the fixed load-bearing part is separated from the hook (4), and after the fixed load-bearing part is separated from the hook (4), the hook (4) can rotate and be hung on the fixed load-bearing part.

6. The rotating climbing formwork support device according to claim 5 is characterized in that: The fixed load-bearing component comprises a load-bearing pin (10), which is fixedly inserted into the wall-mounted hanger (2), and the top of one end of the hook (4) that matches the fixed load-bearing component can be in sliding contact with the load-bearing pin (10), and the bottom of one end of the hook (4) that matches the fixed load-bearing component is provided with a notch that matches the shape of the load-bearing pin (10), and the hook (4) can be hung on the load-bearing pin (10) through the notch.

7. The rotating climbing formwork support device according to claim 6 is characterized in that: The rotating climbing formwork frame support device also includes a second hanging detection component, which includes a fourth sensor (17) and an electrical control system. The fourth sensor (17) is arranged at the bottom of the limit block (9) and corresponds to the hook (4). The fourth sensor (17) is electrically connected to the electrical control system.

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