A power plant induced draft fan sound and vibration combined measuring device

Abstract

The present application relates to the technical field of power plant induced draft fan detection, and particularly relates to a power plant induced draft fan sound and vibration combined measurement device, which comprises a measurement device body, the measurement device body comprises a detection head and a positioning seat, the detection head is detachably arranged at one side end of the positioning seat, a noise sensor is fixed at one side end of the positioning seat, a gravity sensor is arranged in the positioning seat, a plurality of elastic membranes are arranged at one side of the detection head close to the gravity sensor, the elastic membranes are attached to the surface of the gravity sensor, the detection head is provided with a through groove, the elastic membranes are located at one end of the through groove and close the through groove, and a gas sleeve for attaching to the outer surface of the induced draft fan is sealingly inserted into the other end of the through groove. The present application detects the related information of noise through the noise sensor, and for vibration, the impact force, impact amplitude and impact frequency in the vibration generation process can be detected through the gravity sensor and the corresponding auxiliary structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power plant induced draft fan detection, and particularly relates to a sound and vibration combined measurement device for a power plant induced draft fan. BACKGROUND

[0002] In the construction of a power plant, in addition to the power generation equipment as we usually understand, a series of corresponding auxiliary equipment, such as a power plant induced draft fan, a circulating water system and the like, are also included to assist the normal operation of the power generation equipment. In order to ensure the normal operation of the power plant, in addition to the monitoring of the power generation equipment, the synchronous monitoring of these auxiliary equipment is also required.

[0003] Among them, the detection of the power plant induced draft fan is usually the detection of two directions of noise and vibration. The conventional method is to use a noise sensor and a displacement sensor. The noise sensor receives noise information in the working process of the induced draft fan, and the displacement sensor detects the displacement of the induced draft fan to determine the vibration frequency and the vibration amplitude. Although the displacement sensor can detect the vibration amplitude and the vibration frequency, since the induced draft fan has a shell and a corresponding support structure, the impact force generated when the induced draft fan generates displacement cannot be detected by the displacement sensor. Therefore, in view of this problem, a sound and vibration combined measurement device for a power plant induced draft fan is needed to simultaneously detect the information parameters of sound and vibration. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides the following technical solutions:

[0005] A sound and vibration combined measurement device for a power plant induced draft fan, comprising: a measurement device body, wherein the measurement device body comprises a detection head and a positioning seat.

[0006] Specifically, the detection head is detachably arranged at one side end of the positioning seat, a noise sensor is fixed at one side end of the positioning seat, a gravity sensor is arranged in the positioning seat, a plurality of elastic membranes are arranged at one side of the detection head close to the gravity sensor, the elastic membranes are attached to the surface of the gravity sensor, the detection head has a through groove, the elastic membranes are located at one end of the through groove and close the through groove, and a gas sleeve for attaching to the outer surface of the induced draft fan is sealingly inserted into the other end of the through groove. When the induced draft fan vibrates, the gas sleeve extrudes the airflow in the through groove to form a pressure to push the elastic membranes to deform and hit the surface of the gravity sensor.

[0007] As an improvement of the above technical solution, the device further comprises an adjusting arm, wherein the adjusting arm comprises a first arm and a second arm, one end of the first arm is connected to one end of the second arm through a rotating shaft, one end of the first arm is integrally formed with the measurement device body, and the other end of the second arm is connected to a track frame.

[0008] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0009] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0010] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0011] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0012] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0013] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0014] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0015] As the improvement of the above technical scheme, the upper end face of the track frame is provided with a track groove, the inside of the track groove is clamped with a sliding block, one side of the track frame penetrates a lead screw, the lead screw is threaded through the sliding block, and the end of the second supporting arm is connected with the sliding block through a rotating shaft.

[0016] As the improvement of the above technical scheme, the positioning cover is threadedly connected to the limiting seat at the end away from the rubber sleeve, and when the positioning cover is tightened, the limiting groove and the through groove are in the concentric arrangement.

[0017] The beneficial effects of the present application are:

[0018] The noise sensor is used to detect the relevant information of the noise, and the gravity sensor and the corresponding auxiliary structure are used to detect the impact force, impact amplitude and impact frequency in the vibration process, more parameters are detected, less structure is needed, and the detection effect of the vibration information is better, and the application range is more comprehensive compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the present application;

[0020] Figure 2 It is an exploded view of the measuring device body of the present application;

[0021] Figure 3 It is Figure 2 An enlarged structural view of A in the middle;

[0022] Figure 4 It is a side view of the present application;

[0023] Figure 5 It is Figure 4 An isometric side sectional view of B-B in the middle;

[0024] Figure 6 It is Figure 5 An enlarged structural view of B in the middle.

[0025] Reference signs: 10, track frame; 11, track groove; 12, sliding block; 121, mounting seat; 122, nut; 13, lead screw; 14, barrier plate; 20, measuring device; 21, probe head; 211, limiting seat; 212, through groove; 213, air sleeve; 214, limiting ring; 215, positioning cover; 216, limiting groove; 217, rubber sleeve; 218, elastic film; 22, positioning seat; 221, mounting groove; 222, positioning groove; 223, noise sensor; 224, gravity sensor; 30, adjusting arm; 31, support arm one; 32, support arm two. DETAILED DESCRIPTION

[0026] Following, specific embodiments of the present application are illustrated by way of specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of this specification. The present application can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different views and applications, without departing from the spirit of the present application.

[0027] The detection of the power plant induced draft fan is usually the detection of two directions of noise and vibration, and the conventional method is through the noise sensor and the displacement sensor. The noise sensor receives the noise information in the working process of the induced draft fan, and the displacement sensor detects the displacement of the induced draft fan to judge the vibration frequency and the vibration amplitude. Although the displacement sensor can detect the vibration amplitude and the vibration frequency, since the induced draft fan has a shell and a corresponding support structure, the impact force generated when the induced draft fan generates displacement cannot be detected by the displacement sensor. Therefore, in view of this problem, the following embodiment is provided:

[0028] Please refer to Figures 1 to 3 , a power plant induced draft fan sound vibration combined measuring device is provided, which comprises a measuring device body 20, and the measuring device body 20 comprises a detection head 21 and a positioning seat 22.

[0029] Specifically, the detection head 21 is detachably arranged at one side end of the positioning seat 22, a noise sensor 223 is fixed at one side end of the positioning seat 22, a gravity sensor 224 is arranged in the positioning seat 22, a plurality of elastic membranes 218 are arranged at one side of the detection head 21 close to the gravity sensor 224, the elastic membranes 218 are attached to the surface of the gravity sensor 224, the detection head 21 has a through groove 212, the elastic membranes 218 are located at one end of the through groove 212 and close the through groove 212, and a gas sleeve 213 for attaching to the outer surface of the induced draft fan is sealingly inserted into the other end of the through groove 212. When the induced draft fan vibrates, the gas sleeve 213 extrudes the airflow in the through groove 212 to form pressure to push the elastic membranes 218 to deform and hit the surface of the gravity sensor 224.

[0030] In use, the entire measuring device body 20 can be installed on the frame of the induced draft fan through auxiliary structures such as bolts, supports, and straps, and the air sleeve 213 on the probe head 21 is attached to the surface of the induced draft fan. When the induced draft fan vibrates, the vibrating induced draft fan will push the probe head 21 to move, and the probe head 21 in the changed position will extrude the airflow inward, thereby giving the elastic film 218 a pressure. This pressure will be directly transmitted to the gravity sensor 224, and the gravity strength sensed by the gravity sensor 224 is the amplitude of the vibration, and the interval between the two gravity changes experienced by the gravity sensor 224 is the vibration frequency, and the displacement of the vibration is the movement distance of the air sleeve 213, which can completely detect the three data of the vibration, and the monitoring effect is more comprehensive than that of the displacement sensor.

[0031] In an embodiment, the fixing is usually performed by other auxiliary equipment. In order to more conveniently fix the measuring device body 20, please refer to Figure 1 , further comprising an adjusting arm 30, the adjusting arm 30 comprising a first supporting arm 31 and a second supporting arm 32, one end of the first supporting arm 31 is connected with one end of the second supporting arm 32 through a rotating shaft, one end of the first supporting arm 31 is integrally formed with the measuring device body 20, and the other end of the second supporting arm 32 is connected with the track frame 10.

[0032] The first supporting arm 31 and the second supporting arm 32 form a foldable adjusting structure. According to different installation points, the position of the end of the air sleeve 213 is adjusted. According to different structures of the induced draft fan, the adjusting arm 30 can have more supporting arms, and the track frame 10 at the bottom is used to adjust the position of the entire adjusting arm 30, thereby increasing the adjustment range of the overall position.

[0033] Further, please refer to Figure 1 , the upper end surface of the track frame 10 is provided with a track groove 11, the inside of the track groove 11 is clamped with a sliding block 12, one side of the track frame 10 penetrates a lead screw 13, the lead screw 13 is threaded through the sliding block 12, and the second supporting arm 32 is connected with the sliding block 12 through a rotating shaft.

[0034] The rotation of the lead screw 13 drives the movement of the sliding block 12, thereby realizing the function of adjusting the linear position of the entire measuring device body 20. The lead screw 13 can be manually rotated or driven by a motor. The manually rotating mode needs to be additionally provided with a nut for positioning, and the motor-driven mode needs to use a motor with a self-locking function.

[0035] In an embodiment, please refer to Figure 1 , the upper end surface of the sliding block 12 is integrally formed with a mounting seat 121, the end of the second supporting arm 32 is inserted into the inside of the mounting seat 121 and connected through a rotating shaft, and the rotating shaft is threaded connected with a nut 122 on both sides.

[0036] The connection between the second supporting arm 32 and the mounting base 121 is fixed by the nut 122, and the same is true for the connection between the first supporting arm 31 and the second supporting arm 32. The nut 122 is used to fix the connection, so that the position after adjustment can be fixed by tightening the nut 122.

[0037] In order to ensure the disassembly function of the track frame 10 and facilitate the later maintenance, please refer to Figure 1 The track slot 11 penetrates the track frame 10 on one side, and the track frame 10 is provided with a blocking plate 14 on the side penetrated by the track slot 11. One end of the lead screw 13 penetrates the inside of the blocking plate 14 and is connected with the blocking plate 14 through a bearing.

[0038] The blocking plate 14 is arranged to keep the side of the track slot 11 open. When the slider 12 inside needs to be disassembled, the blocking plate 14 can be directly removed. The blocking plate 14 can be fixed by penetrating the blocking plate 14 with a bolt.

[0039] In order to ensure that the noise sensor 223 can more comprehensively receive the transmission of noise, and to avoid the installation of the gravity sensor 224, please refer to Figure 2 and Figure 3 The positioning seat 22 is provided with a mounting groove 221 and a positioning groove 222 on one side. The positioning groove 222 is located at the center of the positioning seat 22, and the mounting groove 221 is located outside the positioning groove 222. The mounting groove 221 is in the form of a ring, and the noise sensor 223 is arranged inside the mounting groove 221.

[0040] The noise sensor 223 is arranged in the form of a ring outside the gravity sensor 224. The disassembly and installation of the gravity sensor 224 will not directly affect the noise sensor 223, which is more convenient for later disassembly and installation.

[0041] As an improvement of the above technical solution, the number of noise sensors 223 is several, which are arranged in the form of a ring inside the mounting groove 221. The mounting groove 221 is provided with a plurality of insertion grooves corresponding to the number of noise sensors 223. The noise sensor 223 is inserted into the insertion groove, and the opening of the mounting groove 221 is provided with a protective rubber film.

[0042] In this way, a uniform ring distribution can be formed by combining multiple noise sensors 223, ensuring the stability and accuracy of noise reception at each position.

[0043] In order to further improve the structure of the detection head 21, please refer to Figures 2 to 6The probe head 21 comprises a limiting seat 211, a rubber sleeve 217, a through groove 212 penetrating through both sides of the limiting seat 211, the rubber sleeve 217 being adhered to one side of the limiting seat 211, an elastic film 218 being integrally formed on one side of the rubber sleeve 217 close to the gravity sensor 224 and covering one end of the through groove 212, and a gas sleeve 213 being inserted into the other end of the through groove 212 to form a closed cavity inside the through groove 212.

[0044] That is, the probe head 21 is a structure formed by the limiting seat 211, the rubber sleeve 217 and the gas sleeve 213, the tail of which is closed by the elastic film 218 to form an internally closed air cavity structure, when extrusion occurs outside, since air flow cannot flow out, inward extrusion will be formed, the easily deformed elastic film 218 will form inward pressure, thereby forming extrusion on the gravity sensor 224, and thus the vibration detection function is realized.

[0045] In the foregoing scheme, the sealing property and the fixed limiting function of the gas sleeve 213 cannot be guaranteed, in order to further improve the scheme, please refer to Figures 2 to 6 , specifically, the side of the limiting seat 211 away from the rubber sleeve 217 is detachably fixed with a limiting piece, the limiting piece is used to limit the displacement of the gas sleeve 213 to avoid the gas sleeve 213 from falling out of the through groove 212, and the gas sleeve 213 can move linearly along the central axis of the through groove 212.

[0046] The position of the gas sleeve 213 is limited by the limiting piece, thereby guaranteeing that it moves linearly inside the through groove 212 while avoiding falling out, specifically, in order to realize the foregoing scheme, please refer to Figure 2 and Figure 6 , the limiting piece comprises a positioning cover 215, the positioning cover 215 is detachably fixed to the side of the limiting seat 211 away from the rubber sleeve 217, the surface of the positioning cover 215 is provided with a through limiting groove 216, the inner diameter of the limiting groove 216 is smaller than the inner diameter of the through groove 212, the inner wall of the limiting groove 216 is attached to the outer surface of the gas sleeve 213, and the other end of the gas sleeve 213 is integrally formed with a limiting ring 214, the inner wall of the through groove 212 is attached to the outer surface of the limiting ring 214.

[0047] The maximum moving position of the other side of the gas sleeve 213 is limited by the positioning cover 215, and the moving distance inside is limited by the through groove 212, when the gas sleeve 213 is extruded, downward pressure will be formed, and when the gas sleeve 213 moves outward, the limiting ring 214 will limit it from moving to the outside of the positioning cover 215, thereby guaranteeing the stability of the structure.

[0048] In addition, the shape structure of the gas sleeve 213 is as shown in Figure 6 and Figure 3 , which is a hard structure similar to a test tube, and the gas sleeve 213 itself does not deform.

[0049] In one embodiment, the positioning cover 215 is screwed to the limiting seat 211 away from one end of the rubber sleeve 217. When the positioning cover 215 is screwed, the limiting groove 216 is in a concentric arrangement with the through groove 212.

[0050] The threaded positioning cover 215 can facilitate subsequent connection and installation, and is more convenient to use.

[0051] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical idea disclosed by the present application should be covered by the claims of the present application.

Claims

1. A combined sound and vibration measurement device for power plant induced draft fans, characterized in that, include: The measuring device body (20) includes a probe head (21) and a positioning seat (22); The probe (21) is detachably mounted on one side of the positioning base (22). A noise sensor (223) is fixed on one side of the positioning base (22). A gravity sensor (224) is installed inside the positioning base (22). Several elastic membranes (218) are provided on the side of the probe (21) near the gravity sensor (224). The elastic membranes (218) are attached to the surface of the gravity sensor (224). The probe (21) has a through groove (212). The elastic membranes (218) are located at one end of the through groove (212) and close the through groove (212). An air sleeve (213) for attaching to the outer surface of the induced draft fan is sealed and inserted at the other end of the through groove (212). When the induced draft fan vibrates, the air jacket (213) compresses the airflow inside the through groove (212) to create pressure that causes the elastic membrane (218) to deform and strike the surface of the gravity sensor (224).

2. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 1, characterized in that, include: Adjusting arm (30); The adjusting arm (30) includes a first support arm (31) and a second support arm (32). One end of the first support arm (31) is connected to one end of the second support arm (32) by a rotating shaft. One end of the first support arm (31) is integrally formed with the measuring device body (20). The other end of the second support arm (32) is connected to a track frame (10).

3. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 2, characterized in that: The upper end face of the track frame (10) is provided with a track groove (11), and a slider (12) is inserted into the track groove (11). A lead screw (13) is inserted into one side of the track frame (10), and the lead screw (13) is threaded through the slider (12). The second support arm (32) is connected to the rotating shaft of the slider (12).

4. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 3, characterized in that: The upper end face of the slider (12) is integrally formed with a mounting base (121), and the end of the second support arm (32) is inserted into the internal rotating shaft of the mounting base (121) for connection. Nuts (122) are threaded on both sides of the rotating shaft.

5. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 3, characterized in that: The track frame (10) passes through one side of the track groove (11). The track frame (10) is provided with a baffle plate (14) on the side through which the track groove (11) passes. One end of the lead screw (13) passes into the interior of the baffle plate (14) and is connected to the baffle plate (14) through a bearing.

6. The combined sound and vibration measurement device for power plant induced draft fans according to claim 1, characterized in that: The positioning base (22) has an installation groove (221) and a positioning groove (222) on one side. The positioning groove (222) is located at the center of the positioning base (22), and the installation groove (221) is located outside the positioning groove (222). The installation groove (221) is circular. The noise sensor (223) is located inside the installation groove (221).

7. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 6, characterized in that: The number of noise sensors (223) is several, and they are arranged in a ring inside the mounting groove (221). The mounting groove (221) has the same number of slots as the number of noise sensors (223). The noise sensors (223) are inserted into the slots. A protective rubber membrane is provided at the opening of the mounting groove (221).

8. A combined sound and vibration measuring device for power plant induced draft fans according to any one of claims 1-7, characterized in that: The probe (21) includes a limiting seat (211) and a rubber sleeve (217). The through groove (212) passes through both sides of the limiting seat (211). The rubber sleeve (217) is adhered to one side of the limiting seat (211). The elastic membrane (218) is integrally formed on the side of the rubber sleeve (217) near the gravity sensor (224) and covers one end of the through groove (212). The air sleeve (213) is inserted into the other end of the through groove (212) to form a closed cavity inside the through groove (212).

9. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 8, characterized in that: The limiting seat (211) is detachably fixed with a limiting member on the side away from the rubber sleeve (217). The limiting member is used to limit the displacement of the air sleeve (213) to prevent the air sleeve (213) from falling out of the through groove (212). The air sleeve (213) can move linearly along the central axis of the through groove (212).

10. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 9, characterized in that: The limiting component includes a positioning cover (215), which is detachably fixed to the side of the limiting seat (211) away from the rubber sleeve (217). The surface of the positioning cover (215) is provided with a through limiting groove (216). The inner diameter of the limiting groove (216) is smaller than the inner diameter of the through groove (212). The inner wall of the limiting groove (216) fits the outer surface of the air sleeve (213). The other end of the air sleeve (213) is integrally formed with a limiting ring (214). The inner wall of the through groove (212) fits the outer surface of the limiting ring (214).

11. The combined sound and vibration measurement device for a power plant induced draft fan according to claim 10, characterized in that: The positioning cover (215) is threaded to the end of the limiting seat (211) away from the rubber sleeve (217). When the positioning cover (215) is tightened, the limiting groove (216) and the through groove (212) are in a concentric setting.

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