Water pump noise detection assembly and noise detection method

Abstract

The invention discloses a water pump noise detection assembly and a noise detection method. Comprising a water supply assembly, a semi-anechoic chamber, a sound level meter, a sound level frame used for installation and an installation table used for installing a water pump to be tested, the water supply assembly comprises two water guide pipes, the installation table is located in the middle of the semi-anechoic chamber, the two water guide pipes are located on the two sides of the installation table respectively, and the ends, away from the installation table, of the water guide pipes penetrate out of the semi-anechoic chamber; silencing pieces are arranged on the outer wall of the mute pipe and an inner cavity of the mute pipe, and an abutting piece used for abutting against the water inlet pipe or the water outlet pipe is further arranged in the mute pipe. By adopting the technical scheme, the water flow noise of the water guide pipe is isolated from the to-be-detected pump body, so that the influence on the detection accuracy of the water pump is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water pump noise detection, and in particular to a water pump noise detection assembly and a noise detection method. Background Art

[0002] The noise detection of the pump generally needs to be measured in a closed place with a sound level meter with an accuracy of no less than Class 2. When installing, the pump should be installed on the ground, not on the pool cover or overhead platform to prevent the pool cover or overhead platform from shaking. The above detection conditions are all to reduce the interference of other noises except the operation of the water pump, making the noise detection of the water pump more accurate.

[0003] However, noise from the suction and discharge pipes and their valves is still difficult to avoid, which affects the detection accuracy during testing. Summary of the invention

[0004] In order to reduce the impact of noise generated by other components in the detection environment on the detection, the present application provides a water pump noise detection assembly.

[0005] In the first aspect, the present application provides a method that adopts the following technical solution: A water pump noise detection assembly includes a water supply component, a semi-anechoic chamber, a sound level meter and a sound level rack for installation. The water supply component includes two water pipes and a mounting platform for mounting a water pump to be tested. The mounting platform is located in the middle of the semi-anechoic chamber. The two water pipes are respectively located on both sides of the mounting platform. The ends of the water pipes away from the mounting platform both pass out of the semi-anechoic chamber. A silent pipe is disposed on the outer sleeve of the water pipe, and silencers are disposed on the outer wall and the inner cavity of the silent pipe. A tightening member for tightening the water pipe is also disposed in the silent pipe.

[0006] By adopting the above technical solution, the semi-anechoic chamber can shield the external noise as much as possible. Placing the mounting platform in the middle of the semi-anechoic chamber can reduce the detection error caused by the echo. The water pipe is placed in the silent pipe, and the impact of the water flow noise in the water pipe and the impact noise on the valve body on the detection is reduced by double silencing, thereby reducing the error caused by the water pump noise detection.

[0007] Preferably, the mute pipe comprises an outer pipe and an inner pipe, the outer pipe is installed in the semi-muffler chamber, the inner pipe is used to accommodate the water pipe, and a plurality of muffler holes are opened on the inner pipe.

[0008] Preferably, the water pipe is provided with a regulating valve, the regulating valve is located at one end of the water pipe away from the mounting platform, the area with silencer holes on the inner pipe is the silencer zone, and the silencer zone is located around the inner pipe corresponding to the regulating valve.

[0009] Preferably, a plurality of first sound-absorbing units are installed on the inner wall of the semi-sound-absorbing chamber, wherein the first sound-absorbing units include a plurality of pairs of first sound-absorbing blocks, wherein a pair of first sound-absorbing blocks includes two sound-absorbing blocks parallel to each other, and adjacent pairs of first sound-absorbing blocks of the same first sound-absorbing unit are vertically arranged.

[0010] Preferably, a second silencer unit is provided at a position of the semi-silence chamber corresponding to the silencer pipe, and the second silencer unit includes a plurality of second silencer blocks in a ring array, and the second silencer blocks are arranged around the silencer pipe.

[0011] Preferably, the mounting platform comprises a plurality of height-adjustable platforms stacked in a vertical direction, and the water pipe is provided with a flange set for connecting to a water pump to be tested at one end close to the mounting platform, and the opening diameter of the flange set is adjustable.

[0012] Preferably, the silent pipe comprises a pipe body provided with an adjustment port and a closing plate for closing the adjustment port, and the adjustment port corresponds to a regulating valve.

[0013] Preferably, the pipe body includes a rigid pipe passing through the semi-anechoic chamber and a flexible pipe for connecting to the water pump to be tested, and the flange assembly includes a first flange installed at one end of the flexible pipe away from the rigid pipe and a second flange for connecting the flexible pipe and the rigid pipe.

[0014] Preferably, the first flange is located in the silent pipe, and the abutting member is used to abut against the outer wall of the flexible pipe and the inner wall of the silent pipe.

[0015] In a second aspect, the present application provides a method for detecting water pump noise, which adopts the following technical solution: A method for detecting water pump noise uses a water pump noise detection assembly.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: reducing the influence of water flow in the water pipe, water flow impacting the regulating valve body, water source and other noise on the noise detection of the water pump body, so that the water pump noise can be detected more accurately. At the same time, it is suitable for water pumps of various calibers and has a wide range of applications. The water flow size can be adjusted in the semi-anechoic room, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of this application; Figure 2 It is a schematic diagram of the structure of the water pipe and the silent pipe in this application; Figure 3 yes Figure 1 a cross-sectional view of the middle closing plate; Figure 4 It is a schematic diagram of the structure of the semi-anechoic interior wall in this application; Figure 5It is a schematic diagram of the distribution of the installation platform and the water pipe in this application; Figure 6 This is a schematic structural diagram of one implementation of the fastening member in the present application; Figure 7 It is a structural schematic diagram of another implementation method of the second flange in the present application; Figure 8 It is a schematic structural diagram of another implementation scheme of the fastening member in the present application; Fig. 9 It is a structural schematic diagram of the gear ring and gear sleeve in this application.

[0018] Explanation of the reference numerals: 1. semi-anechoic chamber; 2. sound level meter; 3. mounting platform; 31. height adjustment platform; 4. water pipe; 41. rigid pipe; 42. flexible pipe; 5. water storage tank; 6. regulating valve; 7. mute pipe; 71. outer pipe; 72. inner pipe; 73. closing plate; 74. pipe body; 741. adjustment port; 8. silencer; 9. silencer hole; 10. first silencer unit; 11. first silencer block; 12. first Second silencer unit; 13. Second silencer block; 14. First flange; 15. Second flange; 151. First flange plate; 152. Second flange plate; 153. Connecting rod; 154. Connecting nut; 16. Fastening member; 17. Fixed sleeve; 18. Fastening sleeve; 19. Fastening rod; 191. Rubber sheet; 20. Silent frame; 21. Gear sleeve; 22. Gear ring; 23. Force ring; 24. Synchronous rod. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, an embodiment of the present application discloses a water pump noise detection assembly, including a water supply component, a semi-anechoic chamber 1, a sound level meter 2, a sound level stand for installation (not shown in the figure), and a mounting platform 3 for installing the water pump to be tested. The mounting platform 3 is located in the middle of the semi-anechoic chamber 1 and is grounded and can be installed using bolts. The water supply component includes a water storage tank 5 and two water pipes 4, and the water storage tank 5 is located outside the semi-anechoic chamber 1. The two water pipes 4 are respectively located on both sides of the mounting platform 3, and the ends of the water pipes 4 away from the mounting platform 3 are both passed through the outside of the semi-anechoic chamber 1 and connected to the water storage tank 5. A regulating valve 6 is provided on the water pipe 4, and the regulating valve 6 is located at the end of the water pipe 4 away from the mounting platform 3. A silent pipe 7 is provided on the outer shell of the water pipe 4, and the regulating valve 6 is located in the silent pipe 7. The silent pipe 7 passes through the silent frame 20( Figure 4 ) is fixedly installed in the semi-anechoic chamber 1, and the outer wall of the silent pipe 7 and the inner cavity of the silent pipe 7 are both provided with silencers 8. The sound level meter 2 is installed on one side of the mounting platform 3 through a sound level rack, and the sound level meter 2 and the two water pipes 4 are not located on the same side.

[0021] During the test, the water pump to be tested is installed on the mounting platform 3, and the water pipe 4 is connected to both sides of the water pump to be tested. Then the regulating valve 6 is adjusted to a suitable opening, and the water pump to be tested is turned on, so that the water flow circulates between the water pipe 4, the water pump and the water storage tank 5. Then the noise of the water pump to be tested is detected by the sound level meter 2. In this process, the semi-anechoic chamber 1 forms a semi-reverberation sound field in the venue, and the water pump to be tested is placed in the middle of the semi-anechoic chamber 1, so that the sound energy emitted by it is reflected and absorbed by the surrounding walls to an almost equal degree, creating an environment conducive to the detection of the sound level meter 2. The silent pipe 7 isolates the water flow noise in the regulating valve 6 and the water pipe 4 to a certain extent, and the sound level meter 2 is almost the same distance from the two water pipes 4 to reduce the interference caused by the unilateral background noise. Furthermore, the sound level rack can be of lifting type or manipulator type, which is convenient for noise testing at various points of the water pump to be tested.

[0022] like Figure 1 and Figure 2 As shown, in order to improve the mute effect, the mute pipe 7 includes an outer pipe 71 and an inner pipe 72, the outer pipe 71 is installed on the ground of the semi-anechoic chamber 1 through a mute frame, and the inner pipe 72 is used to accommodate the water pipe 4. The noise caused by the water flow and the valve body in the water pipe 4 needs to be transmitted to the semi-anechoic chamber 1 in the order of air, inner pipe 72, air, and outer pipe 71, and the sound energy is greatly lost, thereby reducing the background noise caused by the water flow.

[0023] like Figure 1 and Figure 2 As shown, in order to facilitate the adjustment of the water flow, the silent tube 7 includes a tube body 74 provided with an adjustment port 741 and a closing plate 73 for closing the adjustment port 741, and the adjustment port 741 corresponds to the regulating valve 6. When the regulating valve 6 needs to be operated, the closing plate 73 is opened, and the closing plate 73 can be closed after the adjustment is completed, which is easy to operate. The operator does not need to leave the room for operation, which improves the detection efficiency. Specifically, the cross-section of the adjustment port 741 is arranged in a stepped shape, so that the closing plate 73 can be stably embedded in the adjustment port 741 and supported by the adjustment port 741. In other embodiments, the closing plate 73 is rotated to be connected to the adjustment port 741, thereby ensuring that the closing plate 73 can stably close and open the adjustment port 741 while reducing the probability of the closing plate 73 being lost.

[0024] Further, such as Figure 2 and Figure 3 As shown, the cross section of the closing plate 73 is C-shaped, so that the sound insulation cavity formed between the outer tube 71 and the inner tube 72 corresponds to the closing plate 73, thereby improving the sound insulation efficiency. Further, for easy taking, a force handle (not shown in the figure) is provided on the closing plate 73.

[0025] Specifically, such as Figure 1 and Figure 2As shown, the silencer includes a plurality of silencer fins. The outer wall of the outer tube 71 and the inner wall of the inner tube 72 are both provided with silencer fins. The inner tube 72 is provided with a plurality of silencer holes 9. The area where the silencer holes 9 are provided on the inner tube 72 is defined as the silencer zone, and the silencer zone is located at the position around the inner tube 72 corresponding to the regulating valve 6. That is, a silencer zone is also provided on the inner side of the closing plate 73. No silencer fins are provided on the inner wall of the inner tube 72 provided with the silencer zone. The silencer zone and the silencer fins form a flow channel to cooperate, further improving the silencer effect of the silencer on the silencer tube 7.

[0026] like Figure 4 As shown, a plurality of first silencing units 10 are installed on the inner wall of the semi-anechoic chamber 1. The first silencing units 10 include a plurality of pairs of first silencing blocks 11. A pair of first silencing blocks 11 includes two silencing blocks parallel to each other. Adjacent pairs of first silencing blocks 11 of the same first silencing unit 10 are vertically arranged. The flow channels between the first silencing blocks 11 allow sound energy to be better absorbed, thereby reducing background noise.

[0027] A second silencing unit 12 is provided at a position corresponding to the silent pipe 7 in the semi-silencing chamber 1. The second silencing unit 12 includes a plurality of second silencing blocks 13 in a circular array. The second silencing blocks 13 are arranged around the silent pipe 7. The silencing fins outside the silent pipe 7 are inserted between the intervals of the second silencing blocks 13, which can play a role of limiting support for the silent pipe 7, so that the silent pipe 7 can be installed more stably in the semi-silencing chamber 1. At the same time, the noise generated by the water pipe 4 can escape along the flow path between the second silencing blocks 13, reducing background noise.

[0028] like Figure 5 As shown, in order to make the assembly usable for testing water pumps of various calibers, the mounting platform 3 includes several height adjustment platforms 31 stacked in the vertical direction, and the water pipe 4 is provided with a flange set for connecting with the water pump to be tested near one end of the mounting platform 3, and the opening diameter of the flange set is adjustable. According to the caliber of the water pump to be tested, the appropriate number of height adjustment platforms 31 are stacked together and fixed, and then the caliber of the flange set is adjusted to the caliber corresponding to the water pump to be tested, and then the water pump and the water pipe 4 are connected through the flange set, which is easy to operate and improves the applicability of the water pump detection assembly.

[0029] like Figure 1 and Figure 2As shown, specifically, the tube body 74 includes a rigid tube 41 passing through the semi-anechoic chamber 1 and a flexible tube 42 for connecting to the water pump to be tested, and the flexible tube 42 can be a metal hose or a plastic telescopic tube. The flange assembly includes a first flange 14 installed at one end of the flexible tube 42 away from the rigid tube 41 and a second flange 15 for connecting the flexible tube 42 and the rigid tube 41. The second flange 15 is located in the tube body 74. The first flange 14 is used to connect the flexible tube 42 and the water pump to be tested. During operation, the caliber of the end of the tube body 74 facing the water pump to be tested can be changed by replacing the flexible tube 42, and then the tube body 74 and the water pump to be tested can be connected through the first flange 14.

[0030] like Figure 1 and Figure 2 As shown, in order to further reduce the background noise, the flexible tube 42 is fixed at the same time. A tightening member 16 is also provided in the silent tube 7. The tightening member 16 is used to tighten the outer wall of the flexible tube 42 and the inner wall of the silent tube 7. The tightening member 16 can be an elastic tightening rubber ring.

[0031] Further, in another embodiment, Figure 6 As shown, the abutting member 16 includes a fixed sleeve 17 fixed to the inner wall of the mute tube 7, a abutting sleeve 18 threadedly connected to the fixed sleeve 17, and a abutting rod 19 axially fixed to one end of the abutting sleeve 18. A plurality of abutting rods 19 are arranged at intervals along the circumference of the abutting sleeve 18, and the abutting rods 19 abut against the outer wall of the flexible tube 42. Furthermore, in order to better abut the flexible tube 42, a rubber sheet 191 is provided on the inner side of the abutting rod 19.

[0032] A method for detecting water pump noise, using a water pump noise detection assembly, the steps are as follows: S1. Place the water pump to be tested into the semi-anechoic chamber 1 and close the door of the semi-anechoic chamber 1; S2, select whether to replace the flexible tube 42 according to the caliber of the water pump to be tested. If it needs to be replaced, proceed to step S3 and then to step S4; if it does not need to be replaced, proceed directly to step S4; S3, rotating the abutting sleeve 18 relative to the fixed sleeve 17, unscrewing the entire abutting sleeve 18 so that the second flange 15 is exposed, replacing the flexible tube 42 with a suitable diameter, and then rotating the abutting sleeve 18 onto the fixed sleeve 17, so that the flexible tube 42 is fixed and the inner tube 72 is sealed to a certain extent; S4. According to the caliber of the water pump to be tested, adjust the mounting platform 3 to a suitable height so that the interface of the water pump to be tested and the first flange 14 are at the same height, and then connect the water pipe 4 to the water pump to be tested; S5, open the closing plate 73, adjust the regulating valve 6 to a suitable opening, and then cover the closing plate 73; S6. Turn on the water pump to be tested and use the sound level meter 2 to detect the noise.

[0033] In another embodiment, Figure 7 and Figure 8 As shown, the second flange 15 includes a first flange 151, a second flange 152, a connecting rod 153 and a connecting nut 154. The first flange 151 is fixedly connected to one end of the rigid tube 41, and the second flange 152 is fixedly connected to one end of the flexible tube 42. The connecting rod 153 has a polygonal cross section, and the connecting rod 153 is fixedly connected to the second flange 152. A through groove for the connecting rod 153 to pass through is provided on the first flange 151. The end of the connecting rod 153 away from the second flange 152 is cylindrical and has threads, and the connecting nut 154 is threadedly connected to the end of the connecting rod 153 away from the second flange 152. A groove for inserting the connecting rod 153 is provided on the fastening member 16, and the fastening member 16 is a rubber ring and is always sleeved on the flexible tube 42.

[0034] When installing the flexible tube 42, align the through slot on the second flange 152 with the connecting rod 153, insert the connecting rod 153 into the through slot, and then insert the abutting member 16 into the silent tube 7, so that one end of the silent tube 7 is closed, and the connecting rod 153 is inserted into the embedded groove at the same time. The preliminary fixation of the second flange 15 is completed. Then, the connecting nut 154 is screwed, so that the first flange 151 and the second flange 152 are connected and fixed.

[0035] like Figure 7 and Fig. 9 As shown, in order to facilitate the operation of the connecting nut 154, a gear sleeve 21 is provided on the outside of the connecting nut 154, and a gear ring 22 is rotatably provided on the inner wall of the silent tube 7 through a bearing or other component, and the gear sleeve 21 is meshed with the gear ring 22. A force ring 23 is rotatably provided on the inner wall of the silent tube 7 through a bearing or other component. The force ring 23 and the gear ring 22 are coaxially arranged, and the force ring 23 and the gear ring 22 are interconnected by a plurality of synchronization rods 24 to achieve synchronous rotation. The force ring 23 corresponds to the position of the adjustment port 741. For easy operation, a force handle is provided on the force ring 23, which is not shown in the figure. When the adjustment port 741 is opened, the gear ring 22 can be driven to rotate by applying force to the force ring 23, thereby driving the gear sleeve 21 to rotate, and realizing the screwing of the connecting nut 154.

[0036] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A water pump noise detection assembly, comprising a water supply component, a semi-anechoic chamber (1), a sound level meter (2) and a sound level stand for installation, wherein the water supply component comprises two water pipes (4), and is characterized in that: The invention also comprises a mounting platform (3) for mounting the pump to be tested, the mounting platform (3) being located in the middle of the semi-silence chamber (1), two water pipes (4) being located on both sides of the mounting platform (3), the ends of the water pipes (4) away from the mounting platform (3) both passing through the semi-silence chamber (1), a silent pipe (7) being arranged on the outer sleeve of the water pipe (4), and a silencer (8) being arranged on the outer wall of the silent pipe (7) and the inner cavity of the silent pipe (7), and a tightening member (16) for tightening the water pipe (4) is also arranged inside the silent pipe (7).

2. A water pump noise detection assembly according to claim 1, characterized in that: The mute pipe (7) comprises an outer pipe (71) and an inner pipe (72); the outer pipe (71) is installed in the semi-mute chamber (1); the inner pipe (72) is used to accommodate the water pipe (4); and a plurality of mute holes (9) are provided on the inner pipe (72).

3. A water pump noise detection assembly according to claim 2, characterized in that: The water conduit (4) is provided with a regulating valve (6), and the regulating valve (6) is located at one end of the water conduit (4) away from the mounting platform (3). The area where the silencer hole (9) is opened on the inner tube (72) is a silencer zone, and the silencer zone is located at a position around the inner tube (72) corresponding to the regulating valve (6).

4. A water pump noise detection assembly according to claim 3, characterized in that: A plurality of first silencing units (10) are installed on the inner wall of the semi-silencing chamber (1), wherein the first silencing units (10) include a plurality of pairs of first silencing blocks (11), wherein a pair of first silencing blocks (11) includes two silencing blocks parallel to each other, and adjacent pairs of first silencing blocks (11) of the same first silencing unit (10) are arranged vertically.

5. A water pump noise detection assembly according to claim 4, characterized in that: A second silencing unit (12) is provided at a position of the semi-silencing chamber (1) corresponding to the silencing pipe (7), and the second silencing unit (12) comprises a plurality of second silencing blocks (13) in a circular array, and the second silencing blocks (13) are arranged around the silencing pipe (7).

6. A water pump noise detection assembly according to claim 1, characterized in that: The mounting platform (3) comprises a plurality of height-adjustable platforms (31) stacked in a vertical direction, and the water pipe (4) is provided with a flange set for connecting to a water pump to be tested at one end close to the mounting platform (3), and the opening diameter of the flange set is adjustable.

7. A water pump noise detection assembly according to claim 6, characterized in that: The silent pipe (7) comprises a pipe body (74) provided with an adjustment port (741) and a closing plate (73) for closing the adjustment port (741), and the adjustment port (741) corresponds to the adjustment valve (6).

8. A water pump noise detection assembly according to claim 7, characterized in that: The pipe body (74) comprises a rigid pipe (41) passing through the semi-anechoic chamber (1) and a flexible pipe (42) for connecting to a water pump to be tested, and the flange assembly comprises a first flange member (14) installed at an end of the flexible pipe (42) away from the rigid pipe (41) and a second flange member (15) for connecting the flexible pipe (42) and the rigid pipe (41).

9. A water pump noise detection assembly according to claim 8, characterized in that: The first flange member (14) is located inside the silent tube (7), and the abutting member (16) is used to abut against the outer wall of the flexible tube (42) and the inner wall of the silent tube (7).

10. A method for detecting water pump noise, characterized in that: Use a water pump noise detection assembly as described in any one of claims 1-9.

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