A three-shaft vibration monitoring device for a boiler induced draft fan

Abstract

The utility model discloses a kind of boiler induced draft fan three-axis vibration monitoring devices, including pedestal, three sensor holder and rotational speed detection structure;The surface of X, Y, Z direction on pedestal is separately provided with a sensor holder;Sensor holder is provided with the accommodation hole of accommodation sensor, and sensor holder is provided with several bolt holes, and bolt hole is communicated with accommodation hole, and each bolt hole is threadedly connected with a locking bolt;Rotational speed detection structure includes connecting rod, telescopic rod;Connecting rod one end is fixedly arranged on pedestal, and connecting rod is provided with telescopic slot;Telescopic rod one end is slidably accommodated in telescopic slot, and telescopic rod other end is fixedly connected with vertical rod;Vertical rod is provided with second telescopic slot, and vertical telescopic rod one end is slidably connected with second telescopic slot, and vertical telescopic rod other end is connected with rotational speed sensor.This device can be arranged to realize three-axis vibration monitoring once, improve vibration monitoring efficiency, and only need smaller position to complete multi-axis vibration monitoring, improve monitoring effect.

Description

Technical Field

[0001] This utility model relates to the field of monitoring devices and equipment, and in particular to a three-axis vibration monitoring device for a boiler induced draft fan. Background Technology

[0002] The induced draft fan is a core component of the power plant boiler ventilation system. It provides sufficient oxygen for boiler combustion and exhausts flue gas and waste gases by supplying and exhausting air into the boiler, maintaining stable air pressure and volume within the furnace. It plays a crucial role in ensuring boiler combustion efficiency and operational safety. As a moving piece of equipment, the critical components of the induced draft fan are more prone to failure during high-speed rotation or transmission than the stationary structural parts of the boiler body. Failures can range from minor issues like reduced ventilation and flue gas pollution to severe problems like boiler malfunction, endangering lives and causing significant economic losses. Vibration failures of the induced draft fan pose a serious threat to the production safety of power plant boilers. Therefore, strengthening the monitoring of the induced draft fan's operating status is imperative to reduce potential safety hazards.

[0003] As a rotating moving equipment, vibration is a significant characteristic of induced draft fan operation. Currently, monitoring the performance of vibration signals is the core means of assessing the health status of moving equipment. Therefore, timely detection of induced draft fan faults based on vibration signal characteristics is crucial and feasible for ensuring the production safety of power plant boilers.

[0004] Currently, vibration monitoring of boiler induced draft fans requires placing vibration sensors in multiple locations on the fan casing, typically in at least three directions (X, Y, and Z) to monitor the three-axis vibration. However, the complex on-site environment often makes it difficult to simultaneously place sensors in the correct directions. Furthermore, speed sensors cannot be placed simultaneously, resulting in poor vibration monitoring performance for boiler induced draft fans.

[0005] Therefore, a three-axis vibration monitoring device for boiler induced draft fans is needed to solve the above problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A triaxial vibration monitoring device for a boiler induced draft fan includes a base, three sensor holders, and a speed detection structure; a sensor holder is respectively provided on the X, Y, and Z direction surfaces of the base; the sensor holder is provided with a receiving hole for accommodating the sensor, and the sensor holder is provided with a plurality of bolt holes, which are connected to the receiving holes, and each bolt hole is threadedly connected to a locking bolt.

[0008] The speed detection structure includes a connecting rod and a telescopic rod; one end of the connecting rod is fixedly mounted on the base, and a telescopic groove is provided on the connecting rod; one end of the telescopic rod is slidably housed in the telescopic groove, and the other end of the telescopic rod is fixedly connected to a vertical rod; a second telescopic groove is provided on the vertical rod, one end of the vertical telescopic rod is slidably connected to the second telescopic groove, and the other end of the vertical telescopic rod is connected to the speed sensor.

[0009] Preferably, the top of the telescopic groove is provided with a sliding groove, which is connected to the telescopic groove, and one end of the horizontal locking bolt moves through the sliding groove and is threadedly connected to the telescopic rod.

[0010] Preferably, a vertical locking bolt is provided on the vertical rod with a threaded connection, and the screw of the vertical locking bolt passes through the second expansion groove.

[0011] Preferably, the base is ferromagnetic.

[0012] Preferably, an electromagnet is provided at the bottom of the base, which is fixed to the outer casing of the induced draft fan to transmit the vibration of the induced draft fan to the base.

[0013] Preferably, the sensor holder has a hollow cylindrical structure, and each sensor holder in a circular array is provided with three locking bolts.

[0014] The sensor is a vibration sensor.

[0015] Preferably, one end of the vertical telescopic rod is connected to...

[0016] Preferably, the locking bolts, horizontal locking bolts, and vertical locking bolts are all handle bolts.

[0017] Preferably, the speed sensor is a photoelectric speed sensor.

[0018] Preferably, the base has a cuboid structure, and a sensor holder is provided on the top, left and rear sides of the base, and one end of the connecting rod is connected to the front side of the base.

[0019] Preferably, the lower end of the vertical telescopic rod is connected to the speed sensor via a fixed frame; the fixed frame is connected to the vertical telescopic rod and the speed sensor respectively via bolts.

[0020] Preferably, the sensor is fixed to the sensor holder by its own magnet and locking screw.

[0021] Due to the adoption of the above technical solution, the technological advancements achieved by this utility model compared to existing technologies are as follows: This device can achieve triaxial vibration monitoring in a single deployment, improving vibration monitoring efficiency; it requires only a small area to complete multi-axis vibration monitoring, greatly enhancing the applicability of induced draft fan vibration monitoring; and it can conveniently collect speed signals, improving the vibration monitoring effect. It is also compatible with vibration sensors of different specifications, offering a wide range of sensor applications. The device is compact and lightweight, facilitating on-site use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the triaxial vibration monitoring device for boiler induced draft fans of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the boiler induced draft fan three-axis vibration monitoring device of this utility model.

[0025] Explanation of main component symbols

[0026] Base 11 Sensor Card Socket 21 Reception Hole 22 Sensor 20 Locking bolt 210 Connecting rod 31 Telescopic pole 32 Expansion slot 311 Vertical rod 33 Second telescopic groove 331 Vertical telescopic rod 34 Speed ​​sensor 35 Slide 312 Horizontal locking bolt 313 Vertical locking bolt 332 Electromagnet 110 Fixed frame 340

[0027] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are used. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] Please see Figure 1-2 This utility model provides a three-axis vibration monitoring device for a boiler induced draft fan, including a base 11, three sensor holders and a speed detection structure; a sensor holder is respectively provided on the X, Y and Z direction surfaces of the base 11; the sensor holder 21 is provided with a receiving hole 22 for receiving a sensor 20, and a plurality of bolt holes are provided on the sensor holder 21, which are connected to the receiving hole 22, and each bolt hole is threadedly connected to a locking bolt 210;

[0031] The speed detection structure includes a connecting rod 31 and a telescopic rod 32. One end of the connecting rod 31 is fixedly mounted on the base 11, and a telescopic groove 311 is provided on the connecting rod 31. One end of the telescopic rod 32 is slidably received in the telescopic groove 311, and the other end of the telescopic rod 32 is fixedly connected to a vertical rod 33. A second telescopic groove 331 is provided on the vertical rod 33, and one end of the vertical telescopic rod 34 is slidably connected to the second telescopic groove 331. The other end of the vertical telescopic rod 34 is connected to a speed sensor 35.

[0032] In one embodiment of this utility model, a sliding groove 312 is provided at the top of the telescopic groove 311, and the sliding groove 312 communicates with the telescopic groove 311. One end of the horizontal locking bolt 313 moves through the sliding groove 312 and is threadedly connected to the telescopic rod 32. By rotating the horizontal locking bolt 313, the portion of the connecting rod 31 located on the telescopic groove 311 is clamped between the upper end of the horizontal locking bolt 313 and the connecting rod 31, thereby fixing the connecting rod 31 in the corresponding position as needed.

[0033] In one embodiment of this utility model, a vertical locking bolt 332 is threaded onto the vertical rod 33, and the thread of the vertical locking bolt 332 passes through the second telescopic groove 331. By tightening the vertical locking bolt 332, the thread of the vertical locking bolt 332 contacts the surface of the vertical telescopic rod 34, thereby fixing the vertical telescopic rod 34 in the corresponding position.

[0034] In one embodiment of this utility model, the base 11 is ferromagnetic.

[0035] In one embodiment of this utility model, an electromagnet 110 is provided at the bottom of the base 11. The electromagnet is fixed to the outer shell of the induced draft fan, and the vibration of the induced draft fan is transmitted to the base 11.

[0036] In one embodiment of this utility model, the sensor holder 21 has a hollow cylindrical structure. Each sensor holder 21 is provided with three locking bolts 210 in a circular array. By adjusting the three locking bolts 210, the sensor 20 is aligned with the center of the sensor holder 21 and tightly fixed on the base 11. By adjusting the locking bolts 210, the extension length of the screw of the locking bolt 210 can be changed, which can adapt to sensors 20 of different specifications.

[0037] Sensor 20 is a vibration sensor.

[0038] In one embodiment of this utility model, one end of the vertical telescopic rod 34 is connected to...

[0039] In one embodiment of this utility model, the locking bolt 210, the horizontal locking bolt 313, and the vertical locking bolt 332 are all handle bolts.

[0040] In one embodiment of this utility model, the speed sensor 35 is a photoelectric speed sensor.

[0041] In one embodiment of the present invention, the base 11 has a cuboid structure, and a sensor holder is provided on the top surface, left side and rear side of the base 11 respectively. One end of the connecting rod 31 is connected to the front side of the base 11.

[0042] In one embodiment of this utility model, the lower end of the vertical telescopic rod 34 is connected to the speed sensor 35 through a fixed frame 340; the fixed frame 340 is connected to the vertical telescopic rod 34 and the speed sensor 35 respectively by bolts.

[0043] In use, the base 11 is fixed to the induced draft fan housing, and the corresponding sensor 20 is connected to the sensor holder 21. The detection end of the speed sensor 35 is positioned above the induced draft fan shaft. Data collection and monitoring then commence.

[0044] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A three-axis vibration monitoring device for a boiler induced draft fan, characterized in that: It includes a base, three sensor holders and a speed detection structure; a sensor holder is respectively provided on the X, Y and Z direction surfaces of the base; the sensor holder is provided with a receiving hole for accommodating the sensor, and the sensor holder is provided with several bolt holes, which are connected to the receiving holes, and each bolt hole is threadedly connected to a locking bolt. The speed detection structure includes a connecting rod and a telescopic rod; one end of the connecting rod is fixedly mounted on the base, and a telescopic groove is provided on the connecting rod; one end of the telescopic rod is slidably housed in the telescopic groove, and the other end of the telescopic rod is fixedly connected to a vertical rod; a second telescopic groove is provided on the vertical rod, one end of the vertical telescopic rod is slidably connected to the second telescopic groove, and the other end of the vertical telescopic rod is connected to the speed sensor.

2. The boiler induced draft fan three-axis vibration monitoring device as described in claim 1, characterized in that: The top of the telescopic channel is equipped with a sliding groove, which is connected to the telescopic channel. One end of the horizontal locking bolt moves through the sliding groove and is threadedly connected to the telescopic rod.

3. The boiler induced draft fan triaxial vibration monitoring device as described in claim 1, characterized in that: A vertical locking bolt is threaded onto the vertical rod, and the bolt of the vertical locking bolt passes through the second expansion groove.

4. The boiler induced draft fan triaxial vibration monitoring device as described in claim 1, characterized in that: An electromagnet is installed at the bottom of the base, which is fixed to the outer casing of the induced draft fan to transmit the vibration of the induced draft fan to the base.

5. The boiler induced draft fan three-axis vibration monitoring device as described in claim 1, characterized in that: The sensor holder has a hollow cylindrical structure, and each sensor holder is arranged in a ring array with three locking bolts.

6. The boiler induced draft fan triaxial vibration monitoring device as described in claim 1, characterized in that: The base has a cuboid structure, with a sensor holder on the top, left, and rear sides of the base, and one end of the connecting rod is connected to the front side of the base.

7. The boiler induced draft fan three-axis vibration monitoring device as described in claim 1, characterized in that: The lower end of the vertical telescopic rod is connected to the speed sensor via a fixed frame; the fixed frame is connected to the vertical telescopic rod and the speed sensor via bolts.

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