CN215893991U

CN215893991U - Air preheater multidimensional stall signal detection device

Info

Publication number: CN215893991U
Application number: CN202122426910.4U
Authority: CN
Inventors: 朱威虔; 丁建立; 陈宏燕
Original assignee: Xiamen Huaxia International Power Development Co ltd
Current assignee: Xiamen Huaxia International Power Development Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-02-22
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a multidimensional stalling signal detection device of an air preheater, which comprises a base, a plurality of distance adjustment mechanisms, a plurality of height adjustment mechanisms and a plurality of signal detection mechanisms, wherein each distance adjustment mechanism comprises a plurality of through pipes and a threaded rod, the through pipes are fixedly connected to the base, the threaded rods movably penetrate through the through pipes, each height adjustment mechanism comprises an L-shaped support and a U-shaped fixing frame, the middle part of the U-shaped fixing frame is provided with a strip-shaped adjustment through hole in the vertical direction, the L-shaped support is locked on the strip-shaped adjustment through hole through bolts, the front end of each threaded rod is fixedly connected with the L-shaped support, and the signal detection mechanisms are arranged on the U-shaped fixing frame. The multi-dimensional stall signal detection device has the advantages of being capable of being flexibly adjusted in multiple dimensions, accurate in measurement, convenient to maintain and safer.

Description

Air preheater multidimensional stall signal detection device

Technical Field

The utility model relates to the technical field of signal detection devices, in particular to a multi-dimensional stall signal detection device for an air preheater.

Background

The air preheater (hereinafter referred to as air preheater) of the existing thermal power plant is conventionally provided with a stall alarm device, when the air preheater operates normally, a speed measuring probe can detect the operation of air preheater equipment, and once the air preheater stops operating due to some reason, a speed measuring sensor for detecting the operation cannot detect an operation signal, and the stall alarm device sends an alarm signal to remind a worker of paying attention to risks. The existing signal detection alarm device for the air preheater has the following problems: (1) fixing the distance: the sensor bracket for measuring the rotation of the air preheater is fixed, and after the cold-state working condition is well debugged, the sensing distance is increased to fail or the sensor bracket is too close to the counting gear to be scraped when the thermal expansion is caused during the hot-state operation; (2) the fault detection is inconvenient: when the unit is overhauled, after the air preheater stops rotating, the detection sensor fixedly installed in a narrow space is inconvenient to detect; (3) potential safety hazards exist in overhaul and maintenance: the existing detection sensor for measuring stalling is installed in a detection channel in a narrow space of a transmission shaft of an air preheater, the environment is noisy, the illumination is poor, the dust is more, the temperature is high, and a person is certain dangerous during dynamic debugging under the gap between a rotating part and the sensor. Therefore, a more accurate, safe and convenient-to-maintain air preheater stall signal detection device is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a multi-dimensional stall signal detection device for an air preheater.

The utility model adopts the following technical scheme:

the utility model provides an air preheater multidimension stall signal detection device, includes base, a plurality of distance adjustment mechanism, a plurality of height adjustment mechanism and a plurality of signal detection mechanism, distance adjustment mechanism comprises a plurality of siphunculuss and threaded rod, the siphunculus rigid coupling in on the base, the threaded rod activity run through in the siphunculus, height adjustment mechanism comprises L type support and U type mount, the middle part of U type mount is equipped with the bar adjusting through hole of vertical direction, L type support pass through the bolt lock joint on the bar adjusting through hole, the front end of threaded rod with L type support looks rigid coupling, signal detection mechanism installs on the U type mount.

Furthermore, nuts used for fixing the position of the threaded rod are arranged at two ends of the through pipe.

Further, the distance adjusting mechanism consists of two through pipes and two threaded rods which are arranged side by side.

Further, the signal detection mechanism adopts a non-contact inductive switch.

Furthermore, the signal detection mechanism adopts a proximity switch, and the proximity switch is locked and connected to the top end of the strip-shaped adjusting through hole through a nut.

Furthermore, the signal detection mechanism adopts a magnetic induction switch, and the magnetic induction switch is locked on the top end of the strip-shaped adjusting through hole through a bolt.

Further, the base comprises fixed square pipe and L type mount, L type mount welding is in fixed square pipe is last.

Further, the through pipe is fixed on the L-shaped fixing frame through welding.

Further, a strip-shaped fixing through hole is formed in the top face of the L-shaped fixing frame, and the through pipe is locked to the strip-shaped fixing through hole of the L-shaped fixing frame through a bolt.

After adopting the technical scheme, compared with the background technology, the utility model has the following advantages:

1. the utility model detects the number of the counting gears of the air preheater through the non-contact inductive switch (the proximity switch or the magnetic induction switch), is safer and more reliable, solves the problem that the feedback revolution number of the traditional mechanical pressure lever switch is insensitive, and avoids the possibility of mechanical damage because of no direct contact;

2. aiming at the characteristics of the arc-shaped rotating motion track of the counting gear of the air preheater, the mounting bracket capable of being movably adjusted in multiple dimensions is designed, compared with the traditional simple fixing mode, the angle and the distance of the non-contact inductive switch can be adjusted in multiple dimensions, the accuracy of measurement is ensured, the safety of maintenance is ensured, and the rotating machinery is prevented from being scratched;

3. the non-contact inductive switch can be safely and quickly replaced, the quality of the non-contact inductive switch and the fault of a circuit can be conveniently checked and judged, and a plurality of non-contact inductive switches can be quickly replaced and mutually verified.

Drawings

FIG. 1 is a schematic view of the installation position of the signal detection device and the air preheater according to the present invention;

FIG. 2 is a schematic diagram of the overall structure of the signal detection device of the present invention;

FIG. 3 is an enlarged view of a portion of the signal detection device of the present invention;

fig. 4 is a schematic structural view of an L-shaped bracket and a proximity switch in an embodiment.

Description of reference numerals:

100. a base; 110. fixing the square tube; 120. an L-shaped fixing frame; 121. a strip-shaped fixing through hole;

200. a distance adjusting mechanism; 210. pipe passing; 220. a threaded rod; 230. a nut;

300. a height adjustment mechanism; 310. an L-shaped bracket; 320. a U-shaped fixing frame; 321. a strip-shaped adjusting through hole;

400. a signal detection mechanism; 410. a proximity switch;

500. air preheater gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the apparatus or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.

Examples

As shown in fig. 1 to 4, a multi-dimensional stall signal detection device for an air preheater includes a base 100, three sets of distance adjustment mechanisms 200, three sets of height adjustment mechanisms 300, and three sets of signal detection mechanisms 400, the distance adjustment mechanism 200 is composed of a plurality of through pipes 210 and a threaded rod 220, the through pipes 210 are fixedly connected to the base 100, the threaded rod 220 movably penetrates through the through pipes 210, the height adjustment mechanism 300 is composed of an L-shaped bracket 310 and a U-shaped fixing frame 320, a bar-shaped adjustment through hole 321 in the vertical direction is arranged in the middle of the U-shaped fixing frame 320, the L-shaped bracket 310 is locked to the bar-shaped adjustment through hole 321 by a bolt, the front end of the threaded rod 220 is fixedly connected to the L-shaped bracket 310, and the signal detection mechanism 400 is installed on the U-shaped fixing frame 320.

In use, the entire detection device is mounted next to the gear of the air preheater and the signal detection mechanism 400 is aligned with the gear 500 of the air preheater.

The two ends of the through pipe 210 are provided with nuts 230 for fixing the position of the threaded rod 220, when the device is used, the relative position of the threaded rod 220 in the through pipe 210 is adjusted, the nuts 230 on the two sides are locked, the position of the threaded rod 220 can be fixed, and the threaded rod 220 is prevented from sliding.

The distance adjusting mechanism 200 is composed of two through pipes 210 and two threaded rods 220 which are arranged side by side, and the two through pipes 210 are arranged more stably.

The signal detection mechanism 400 employs a non-contact inductive switch. The signal detection mechanism 400 of this embodiment adopts proximity switch 410, proximity switch 410 passes through nut 230 lock joint and is in the top of bar regulation through-hole 321, proximity switch 410 can external digital display table, PLC (programmable logic controller) and siren, is convenient for look over detection result, regulation and control signal detection mechanism 400 in real time and in time send out trouble alarm.

The base 100 is composed of a fixed square tube 110 and an L-shaped fixing frame 120, and the L-shaped fixing frame 120 is welded to the fixed square tube 110.

The through pipe 210 is fixed to the L-shaped fixing frame 120 by welding. The through pipe 210 of the embodiment is directly welded on the base 100, and when the detection device is used, the detection device can move left and right by directly moving the base 100. In addition, a strip-shaped fixing through hole 121 may be formed in the top surface of the L-shaped fixing frame 120, a bolt may be welded to the bottom of the through pipe 210, and then the through pipe 210 may be locked to the strip-shaped fixing through hole 121 of the L-shaped fixing frame 120 by the bolt, so that the position of the through pipe 210 may be adjusted by adjusting the position of the through pipe 210 on the strip-shaped fixing through hole 121 without moving the base 100.

When the device is used, the height of the signal detection mechanism 400 can be adjusted by adjusting the position of the L-shaped bracket 310 on the strip-shaped adjusting through hole 321, so that the device is aligned with the air preheater gear 500; the distance between the signal detection mechanism 400 and the air preheater gear 500 is adjusted by adjusting the relative position of the threaded rod 220 in the through pipe 210. After the air preheater operates, the clearance between the signal detection mechanism 400 and the gear changes due to the influence of thermal expansion, and the clearance between the signal detection mechanism 400 and the gear is kept within 5mm, so that the accuracy of a measurement result can be ensured, the signal detection mechanism 400 is damaged by touching the gear when the signal detection mechanism 400 is too close to the gear, and a counting signal cannot be detected when the signal detection mechanism is too far away from the gear; in addition, because air preheater job site ambient temperature is high, and the space is narrow and small, breaks down when signal detection mechanism 400, if adopt the mode that directly is close to change signal detection mechanism 400, not only very hard, there is great personal safety threat moreover, adopts the multidimension stall signal detection device of this embodiment, can ensure the security of overhauing and maintaining.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an air preheater multidimension stall signal detection device which characterized in that: including base, a plurality of distance adjustment mechanism, a plurality of height adjustment mechanism and a plurality of signal detection mechanism, distance adjustment mechanism comprises a plurality of siphunculus and threaded rod, the siphunculus rigid coupling in on the base, the threaded rod activity run through in the siphunculus, height adjustment mechanism comprises L type support and U type mount, the middle part of U type mount is equipped with the bar adjusting hole of vertical direction, L type support passes through the bolt lock joint on the bar adjusting hole, the front end of threaded rod with L type support looks rigid coupling, signal detection mechanism installs on the U type mount.

2. The air preheater multi-dimensional stall signal detection device as claimed in claim 1, wherein: and nuts used for fixing the positions of the threaded rods are arranged at the two ends of the through pipe.

3. The air preheater multi-dimensional stall signal detection device as claimed in claim 2, wherein: the distance adjusting mechanism consists of two through pipes and two threaded rods which are arranged side by side.

4. The air preheater multi-dimensional stall signal detection device as claimed in claim 2, wherein: the signal detection mechanism adopts a non-contact inductive switch.

5. The air preheater multi-dimensional stall signal detection device of claim 4, wherein: the signal detection mechanism adopts a proximity switch, and the proximity switch is locked and connected to the top end of the strip-shaped adjusting through hole through a nut.

6. The air preheater multi-dimensional stall signal detection device of claim 4, wherein: the signal detection mechanism adopts a magnetic induction switch, and the magnetic induction switch is locked at the top end of the bar-shaped adjusting through hole through a bolt.

7. The air preheater multi-dimensional stall signal detection device as claimed in claim 1, wherein: the base comprises fixed square pipe and L type mount, L type mount welding is in fixed square pipe is last.

8. The apparatus for detecting multi-dimensional stall signals of an air preheater as claimed in claim 7, wherein: the through pipe is fixed on the L-shaped fixing frame through welding.

9. The apparatus for detecting multi-dimensional stall signals of an air preheater as claimed in claim 7, wherein: the top surface of the L-shaped fixing frame is provided with a strip-shaped fixing through hole, and the through pipe is locked on the strip-shaped fixing through hole of the L-shaped fixing frame through a bolt.