An isolation damper feedback device

Abstract

A feedback isolation device for a damper. Due to the weak and unstable magnetic force of the internal magnetic ring of the cylinder, signal abnormalities frequently occur, leading to damper malfunction. This invention includes: a locking cylinder, on the cylinder wall of which two proximity switches are fixed. The characteristic feature is that a feedback bracket is fixed to the piston rod of the locking cylinder, and a magnetic sleeve is fixed to the top of the feedback bracket. A strong magnet is inserted into the magnetic sleeve, and the strong magnet is aligned with one of the proximity switches. This invention is used for damper feedback isolation.

Description

Technical Field

[0001] This utility model relates to an isolation damper feedback device. Background Technology

[0002] Isolation dampers are shut-off and isolation devices for the cold and hot air ducts of boilers. The isolation damper is opened and closed by a locking cylinder driving a connecting rod bracket. The feedback signal for the damper to be in place is transmitted by a magnetic ring inside the cylinder sensing two magnetic memory proximity switches outside the cylinder. However, due to the weak magnetic force of the magnetic ring inside the cylinder and its unstable action, abnormal signals often occur, causing the isolation damper to fail to operate. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned technical problems and provide an isolation damper feedback device.

[0004] The above objectives are achieved through the following technical solutions: An isolation damper feedback device comprises: a locking cylinder, two proximity switches fixed on the cylinder wall of the locking cylinder, a feedback bracket fixed on the piston rod of the locking cylinder, a magnetic sleeve fixed on the top of the feedback bracket, a strong magnet inserted into the magnetic sleeve, and the strong magnet aligned with one of the proximity switches.

[0005] The aforementioned isolation damper feedback device includes a feedback bracket comprising a clamp, one side of which is fixed to a bottom support rod, the top of which is bolted to an upper sleeve, and a magnet sleeve fixed to the top of the upper sleeve.

[0006] In the aforementioned isolation damper feedback device, the magnet is fitted with a threaded locking bolt, and the end face of the locking bolt presses against the strong magnet.

[0007] The beneficial effects of this utility model are: 1. This utility model adds a feedback bracket with a strong magnet to the bottom of the cylinder piston rod to act as a proximity switch from outside the cylinder. After adding the feedback bracket with a strong magnet, the sensing intensity of the feedback signal is greatly increased, the reliability of the signal is increased, and the defect rate is significantly reduced. Attached Figure Description

[0008] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 This is the front view of the feedback bracket; Appendix Figure 3 This is a side view of the feedback bracket; In the diagram: 1. Locking cylinder; 2. Upper proximity switch; 3. Piston; 4. Inner magnetic ring; 5. Lower proximity switch; 6. Strong magnet; 7. Feedback bracket; 8. Piston rod; 9. Locking bolt; 10. Magnet sleeve; 11. Upper sleeve; 12. Fixing screw; 13. Sliding hole; 14. Bottom support rod; 15. Clamp. Detailed Implementation

[0009] Reference Figures 1-3 An isolation damper feedback device comprises: a locking cylinder 1, on which two proximity switches are fixed, one of which is an upper proximity switch 2 and the other is a lower proximity switch 5. Both proximity switches are magnetic memory proximity switches. A feedback bracket is fixed on the piston rod of the locking cylinder. A magnetic sleeve is fixed on the top of the feedback bracket. A strong magnet is inserted into the magnetic sleeve and is aligned with one of the proximity switches.

[0010] The aforementioned isolation damper feedback device includes a feedback bracket comprising a clamp that grips the end of a piston rod. One side of the clamp is fixed to a bottom support rod, which is an L-shaped rod. The top of the bottom support rod is bolted to an upper sleeve. A fixing screw 12 is fixed on the bottom support rod. A sliding hole 13 is provided on the side wall of the upper sleeve. The fixing screw passes through the sliding hole and is threadedly connected to a nut. A magnet sleeve 10 is fixed to the top of the upper sleeve. In the aforementioned isolation damper feedback device, the magnet is threadedly connected to a locking bolt 9, and the end face of the locking bolt presses against the strong magnet.

[0011] Working principle: When opening and closing the isolation damper, the piston rod of the locking cylinder moves. When the inner magnetic ring 4 on the piston 3 in the locking cylinder is aligned with the lower proximity switch, it indicates that the opening is complete. When the piston rod moves downward, the feedback bracket also moves downward. After the opening is complete, the strong magnet will be aligned with the lower proximity switch, which increases the induction intensity of the feedback signal, increases the reliability of the signal, and significantly reduces the defect rate. When the isolation damper needs to be closed, the piston rod moves upward, driving the feedback bracket to move upward until the inner magnetic ring is aligned with the upper proximity switch and stops. At this time, the strong magnet is aligned with the upper proximity switch, which increases the induction intensity of the feedback signal and increases the reliability of the signal. During installation, first secure the clamp to the piston rod, then loosen the nut on the fixing screw, adjust the position of the upper sleeve to adjust the height of the strong magnet so that it is aligned with the proximity switch. After alignment, tighten the nut on the fixing screw, then loosen the locking bolt, adjust the position of the strong magnet to change the distance between the strong magnet and the proximity switch until the proximity switch can sense the strong magnet, and then tighten the locking bolt.

Claims

1. An isolation damper feedback device, comprising: A locking cylinder, wherein two proximity switches are fixed on the cylinder wall, characterized in that: a feedback bracket is fixed on the piston rod of the locking cylinder, a magnetic sleeve is fixed on the top of the feedback bracket, a strong magnet is inserted into the magnetic sleeve, and the strong magnet is aligned with one of the proximity switches.

2. The feedback device for an isolation damper according to claim 1, characterized in that: The feedback bracket includes a clamp, one side of which is fixed to a bottom support rod. The top of the bottom support rod is connected to an upper sleeve by bolts, and a magnet sleeve is fixed to the top of the upper sleeve.

3. The feedback device for an isolation damper according to claim 2, characterized in that: The magnet is fitted with a threaded locking bolt, and the end face of the locking bolt presses against the strong magnet.

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