Noise reduction assembly for multistage centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pump noise reduction, and discloses a noise reduction assembly for a multi-stage centrifugal pump, which comprises a base, the multi-stage centrifugal pump fixed at the top of the base, a first shielding plate fixed at the top of the base through a support plate, sound absorption cotton fixed on the inner surface of the first shielding plate, and reflection and offset can be carried out through the sound absorption cotton. A through hole is formed in the top of the first shielding plate and located in one side of the top of the multi-stage centrifugal pump. By arranging the first shielding plate and the second shielding plate, noise generated by the multi-stage centrifugal pump can be reflected and isolated through the first shielding plate and the second shielding plate when the first shielding plate and the second shielding plate are arranged outside the multi-stage centrifugal pump in a covering mode, so that the amount of the noise transmitted into the air is reduced, and the noise reduction effect is achieved; therefore, the noise generated by the multi-stage centrifugal pump is prevented or reduced from harming the body health of people, and the use is relatively convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction of centrifugal pumps, in particular to a noise reduction component for a multi-stage centrifugal pump. Background Art

[0002] A multi-stage centrifugal pump is a combination of two or more centrifugal pumps with the same function. In terms of fluid channel structure, the medium pressure relief port of the first stage is connected to the inlet of the second stage, and the medium pressure relief port of the second stage is connected to the inlet of the third stage. Such a series connection mechanism forms a multi-stage centrifugal pump.

[0003] At present, some existing multi-stage centrifugal pumps make noise during operation. The noise not only affects hearing, but also has adverse effects on the human cardiovascular system, nervous system, and endocrine system, causing harm to people's physical health. It is relatively inconvenient to use. Therefore, we propose a noise reduction component for multi-stage centrifugal pumps to solve or improve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a noise reduction assembly for a multi-stage centrifugal pump, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: it includes a base, a multi-stage centrifugal pump fixed to the top of the base, a first shielding plate fixed to the top of the base through a support plate, a second shielding plate slidably installed inside the first shielding plate, a threaded rod inserted into the base and rotatably connected to the threaded rod through a bearing, a second limiting rod fixed to the base, a slider fixed to the bottom of the second shielding plate, and a covering assembly arranged inside the second shielding plate.

[0006] Furthermore, the covering assembly includes a third shielding plate inserted into the second shielding plate and slidably connected to the second shielding plate, a first limiting rod fixed inside the second shielding plate, and a spring sleeved on the surface of the first limiting rod.

[0007] Furthermore, one end of the threaded rod passes through the surface of the base and an adjusting knob is fixed to the top end, and the surface of the adjusting knob is provided with anti-slip grooves.

[0008] Furthermore, a limiting block is fixed on the surface of the third shielding plate, and the limiting block is located inside the second shielding plate and is slidably connected to the second shielding plate.

[0009] Furthermore, a through hole is opened on the surface of the second shielding plate, and the through hole is located on one side of the multi-stage centrifugal pump.

[0010] Furthermore, a through hole is formed on the top of the first shielding plate, and the through hole is located on one side of the top of the multi-stage centrifugal pump.

[0011] Compared with the prior art, the utility model has the following beneficial effects: by arranging the first shielding plate and the second shielding plate, when the first shielding plate and the second shielding plate are covered on the outside of the multi-stage centrifugal pump, the noise emitted by the multi-stage centrifugal pump can be reflected and isolated by the first shielding plate and the second shielding plate, thereby reducing the amount of noise transmitted into the air and achieving the effect of noise reduction, thereby avoiding or reducing the harm to human health caused by the noise emitted by the multi-stage centrifugal pump, and it is relatively convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the second limiting rod of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the adjustment knob of the utility model;

[0015] Figure 4 This is a schematic diagram of the spring structure of the utility model.

[0016] In the figure: 1. base; 2. first shielding plate; 3. second shielding plate; 4. threaded rod; 5. slider; 6. multi-stage centrifugal pump; 7. third shielding plate; 8. spring; 9. first limit rod; 10. adjustment knob; 11. second limit rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-4, including a base 1, a multi-stage centrifugal pump 6 fixed to the top of the base 1, a first shielding plate 2 fixed to the top of the base 1 through a support plate, the inner surface of the first shielding plate 2 is fixed with sound-absorbing cotton, which can reflect and offset the noise to reduce the spread of noise, a through hole is opened on the top of the first shielding plate 2, and the through hole is located on one side of the top of the multi-stage centrifugal pump 6. The through hole can facilitate the pipe to pass through the inside of the first shielding plate 2 and be installed on the surface of the multi-stage centrifugal pump 6, the second shielding plate 3 is slidably installed inside the first shielding plate 2, and the inner surface of the second shielding plate 3 is fixed with sound-absorbing cotton. The sound cotton can reflect and offset the sound, reducing the spread of noise. A slot is provided on the top of the second shielding plate 3. When a pipe is installed on the top of the multi-stage centrifugal pump 6 and the second shielding plate 3 moves toward the side close to the first shielding plate 2, the pipe will enter the inside of the slot, thereby preventing the pipe from blocking the second shielding plate 3 and causing the second shielding plate 3 to be unable to move to the inside of the first shielding plate 2. A limit block is fixed on the surface of the second shielding plate 3. The limit block is located inside the first shielding plate 2 and is slidably connected to the first shielding plate 2. The limit block can limit the position of the second shielding plate 3, avoiding the second shielding plate 3 from blocking the second shielding plate 3. The shielding plate 3 is detached from the inside of the first shielding plate 2, and a through hole is provided on the surface of the second shielding plate 3. The through hole is located on one side of the multi-stage centrifugal pump 6. The pipeline can be easily passed through the inside of the second shielding plate 3 and installed on the surface of the multi-stage centrifugal pump 6 through the through hole. The threaded rod 4 is inserted into the inside of the base 1 and is rotatably connected to the threaded rod 4 through a bearing. One end of the threaded rod 4 passes through the surface of the base 1 and an adjusting knob 10 is fixed to the top. When the adjusting knob 10 is rotated, the fixed threaded rod 4 is driven to rotate. The surface of the adjusting knob 10 is provided with anti-slip texture, which can increase the surface of the adjusting knob 10. The friction between the surface and the hand reduces or avoids slipping between the hand and the adjustment knob 10. The second limit rod 11 is fixed to the inside of the base 1, and the slider 5 is fixed to the bottom of the second shielding plate 3. The slider 5 is slidably installed inside the base 1. There are two groups of sliders 5 symmetrically fixed at the bottom of the second shielding plate 3. The second limit rod 11 passes through the inside of one group of sliders 5 and is slidably connected to the slider 5. The threaded rod 4 passes through the inside of the other group of sliders 5 and is threadedly connected to the other group of sliders 5. When the threaded rod 4 rotates, it will drive the other group of sliders 5 to move, and the covering assembly is arranged inside the second shielding plate 3.

[0019] The covering assembly includes a third shielding plate 7 inserted into the second shielding plate 3 and slidably connected to the second shielding plate 3. The third shielding plate 7 is located inside the slot set at the top of the second shielding plate 3. Sound-absorbing cotton is fixed to the bottom of the third shielding plate 7. The sound-absorbing cotton can reflect and offset the noise to reduce the spread of noise. A limit block is fixed on the surface of the third shielding plate 7. The limit block is located inside the second shielding plate 3 and slidably connected to the second shielding plate 3. The limit block can limit the position of the third shielding plate 7 to prevent the third shielding plate 7 from blocking the inside of the second plate 3 Disengage, fix the first limiting rod 9 inside the second shielding plate 3, one end of the first limiting rod 9 is inserted into the inside of the third shielding plate 7 and is slidably connected to the third shielding plate 7, and the first limiting rod 9 is symmetrically fixed with two groups inside the second shielding plate 3. The first limiting rod 9 can limit the position of the multi-stage centrifugal pump 6 to prevent the third shielding plate 7 from tilting when it moves. The spring 8 is sleeved on the surface of the first limiting rod 9, one end of the spring 8 contacts the surface of the third shielding plate 7, and the other end contacts the inner surface of the second shielding plate 3. When the third shielding plate 7 moves When the second shielding plate 3 needs to be adjusted to fit the multi-stage centrifugal pump 6 of different sizes, the adjusting knob 10 can be turned to drive the fixed threaded rod 4 to rotate. When the threaded rod 4 rotates, the slider 5 connected with the thread will move. When the slider 5 moves, it will drive the second shielding plate 3 to move to the side close to the first shielding plate 2. The movement of the second shielding plate 3 will bring The third shielding plate 7 inserted inside the movable body moves. When the third shielding plate 7 moves, the arc groove on the surface will contact the surface of the pipe. At this time, the third shielding plate 7 will stop moving and squeeze the spring 8. At this time, the second shielding plate 3 continues to move, which will cause the third shielding plate 7 to enter the interior of the second shielding plate 3. When the second shielding plate 3 moves to the through hole and is aligned with the position on the surface of the multi-stage centrifugal pump 6 where the pipe needs to be installed, the adjustment of the second shielding plate 3 can be completed, so that the component can adapt to multi-stage centrifugal pumps 6 of different sizes, thereby improving the adaptability of the component to multi-stage centrifugal pumps 6 of different sizes.

[0020] Working principle: when it is necessary to reduce the noise emitted by the multi-stage centrifugal pump 6 during operation, the threaded rod 4 can be driven to rotate by turning the adjusting knob 10. When the threaded rod 4 rotates, the threaded slider 5 connected will be driven to move. When the slider 5 moves, the second shielding plate 3 will be driven to move, so that the second shielding plate 3 can be moved and cooperated with the first shielding plate 2 to cover the multi-stage centrifugal pump 6 on one side of the interior. At this time, the noise emitted by the multi-stage centrifugal pump 6 can be reflected and isolated by the first shielding plate 2 and the second shielding plate 3, thereby reducing the amount of noise transmitted into the air and achieving the effect of noise reduction, thereby avoiding or reducing the noise emitted by the multi-stage centrifugal pump 6 causing harm to people's health. It is relatively convenient to use. At the same time, when the second shielding plate 3 moves, the spring 8 will push the third shielding plate 7 to move, so that the third shielding plate 7 moves to the side close to the first shielding plate 2, so that the third shielding plate 7 can cover the slot set on the top of the second shielding plate 3, reducing or avoiding the noise from being transmitted to the outside through the slot on the top of the second shielding plate 3, thereby improving the noise reduction effect of the component.

[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction assembly for a multi-stage centrifugal pump, characterized in that: It comprises a base (1), and a multi-stage centrifugal pump (6) fixed on the top of the base (1); A first shielding plate (2), the first shielding plate (2) being fixed to the top of the base (1) via a support plate; A second shielding plate (3), the second shielding plate (3) being slidably mounted inside the first shielding plate (2); A threaded rod (4), the threaded rod (4) is inserted into the base (1) and is rotatably connected to the threaded rod (4) via a bearing; A second limiting rod (11), the second limiting rod (11) is fixed inside the base (1); A slider (5), the slider (5) is fixed to the bottom of the second shielding plate (3); A covering component is arranged inside the second shielding plate (3).

2. A noise reduction assembly for a multi-stage centrifugal pump according to claim 1, characterized in that: The covering assembly includes a third shielding plate (7) inserted into the second shielding plate (3) and slidably connected to the second shielding plate (3), a first limiting rod (9) fixed inside the second shielding plate (3), and a spring (8) sleeved on the surface of the first limiting rod (9).

3. The noise reduction assembly for a multi-stage centrifugal pump according to claim 1, characterized in that: One end of the threaded rod (4) passes through the surface of the base (1) and an adjusting knob (10) is fixed to the top end. The surface of the adjusting knob (10) is provided with anti-slip patterns.

4. The noise reduction assembly for a multi-stage centrifugal pump according to claim 1, characterized in that: A limiting block is fixed on the surface of the third shielding plate (7), and the limiting block is located inside the second shielding plate (3) and is slidably connected to the second shielding plate (3).

5. The noise reduction assembly for a multi-stage centrifugal pump according to claim 1, characterized in that: A through hole is provided on the surface of the second shielding plate (3), and the through hole is located on one side of the multi-stage centrifugal pump (6).

6. The noise reduction assembly for a multi-stage centrifugal pump according to claim 1, characterized in that: A through hole is provided on the top of the first shielding plate (2), and the through hole is located on one side of the top of the multi-stage centrifugal pump (6).

Images