阅读说明：本技术 一种具有降噪功能的贯流泵机组 (Tubular pump unit with function of making an uproar is fallen ) 是由 李星 朱天翔 胡薇 赵丽丽 朱庆龙 梁樑 王传富 汪冰 胡明志 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种具有降噪功能的贯流泵机组,属于贯流泵机组技术领域,通过在贯流泵进出水两端加装两个降噪部件,两个降噪部件的结构相同,均包括两个对立设置的接口法兰,两个接口法兰之间设有阻尼波纹管,阻尼波纹管的两端与两个接口法兰密封连接,阻尼波纹管的内部设有弹性气囊,弹性气囊的两端与两个接口法兰密封连接,弹性气囊和阻尼波纹管属于柔性系统,避免了直接将贯流泵刚性连接到泵站管路上,提高了贯流泵机组的安装效率和质量,当水流冲击贯流泵机组时,降噪部件可以产生弹性形变,吸收冲击,减少了贯流泵机组与混凝土基体之间的激振,降低了压力脉动造成的脉冲噪声,改善了现有贯流泵机组振动噪声大的问题。(The invention discloses a tubular pump unit with noise reduction function, belonging to the technical field of tubular pump units, wherein two noise reduction parts are additionally arranged at the two ends of inlet and outlet water of a tubular pump, the two noise reduction parts have the same structure and respectively comprise two oppositely arranged interface flanges, a damping corrugated pipe is arranged between the two interface flanges, the two ends of the damping corrugated pipe are hermetically connected with the two interface flanges, an elastic air bag is arranged inside the damping corrugated pipe, the two ends of the elastic air bag are hermetically connected with the two interface flanges, the elastic air bag and the damping corrugated pipe belong to a flexible system, thereby avoiding the direct rigid connection of the tubular pump to a pump station pipeline, improving the installation efficiency and the quality of the tubular pump unit, when water flow impacts the tubular pump unit, the noise reduction parts can generate elastic deformation and absorb impact, reducing the excitation between the tubular pump unit and a concrete matrix and reducing the impulse noise caused by pressure pulsation, the problem of current tubular pump unit vibration noise big is improved.)

1. The cross-flow pump unit with the noise reduction function comprises a cross-flow pump (3), and a water inlet end embedded sleeve (1) and a water outlet end embedded sleeve (5) which are respectively positioned at two ends of the cross-flow pump (3), and is characterized in that a first noise reduction component (2) is installed at the water inlet end of the cross-flow pump (3), a second noise reduction component (4) is installed at the water outlet end of the cross-flow pump (3), and the first noise reduction component (2) and the second noise reduction component (4) are identical in structure.

2. The through-flow pump unit with the noise reduction function according to claim 1, wherein the first noise reduction part (2) comprises a first interface flange (201) and a second interface flange (204) which are oppositely arranged, a damping corrugated pipe (202) is arranged between the first interface flange (201) and the second interface flange (204), two ends of the damping corrugated pipe (202) are respectively connected with the first interface flange (201) and the second interface flange (204) in a sealing manner, an elastic air bag (203) is arranged inside the damping corrugated pipe (202), and two ends of the elastic air bag (203) are respectively connected with the first interface flange (201) and the second interface flange (204) in a sealing manner.

3. The tubular flow pump unit with noise reduction function according to claim 2, wherein the wall of the damping corrugated pipe (202) is a single-layer corrugated surface, and the outer side of the corrugated surface comprises two wave crests and three wave troughs.

4. Through-flow pump assembly with noise reduction according to claim 2, characterized in that the tube wall of the elastic air bag (203) is provided with a cavity (231) inside.

5. The through-flow pump unit with the noise reduction function according to claim 1, wherein the water inlet end embedded sleeve (1) and the water outlet end embedded sleeve (5) are identical in structure and respectively comprise a metal pipe (101), a flange plate (102), a first wing ring (103) and a second wing ring (104), the flange plate (102) is welded at the upper end of the metal pipe (101), the first wing ring (103) and the second wing ring (104) are welded at the outer side of the metal pipe (101), and the second wing ring (104) is located at one end far away from the flange plate (102).

6. The tubular pump unit with the noise reduction function according to claim 1, wherein the water inlet end of the tubular pump (3) is connected with one end of the first noise reduction part (2) through a bolt, and one end, far away from the tubular pump (3), of the first noise reduction part (2) is connected with the embedded sleeve (1) at the water inlet end through a bolt.

7. The tubular pump unit with the noise reduction function according to claim 1, wherein the water outlet end of the tubular pump (3) is connected with one end of the second noise reduction part (4) through a bolt, and one end, far away from the tubular pump (3), of the second noise reduction part (4) is connected with the water outlet end embedded sleeve (5) through a bolt.

Technical Field

The invention relates to the technical field of through-flow pump units, in particular to a through-flow pump unit with a noise reduction function.

Background

The tubular pump is composed of a motor, a speed reducer and a water pump, and is arranged in a machine pit in an underwater dam, the water inlet and outlet channels of the tubular pump are positioned on a straight line and are approximately in a straight cylinder shape, the hydraulic loss is less, the water lifting efficiency is high, the structure is compact, the tubular pump is convenient to install and maintain, and the operation cost is relatively low. The tubular pump can be applied to a low-water-head power station, and can realize multiple functions of power generation, flood control, water supply, shipping and the like.

With the continuous improvement of the technical level and the production and living requirements of the tubular pump, the capacity of the tubular pump is further expanded, and the problems of vibration noise and installation are increasingly highlighted, so that a solution is urgently needed. In the prior art, the tubular pump unit and the pump station pipeline are directly and rigidly connected, and because the position of the pre-buried pipeline is determined when the pump station matrix is built, the position of the tubular pump needs to be continuously adjusted to reach a relatively accurate angle and position so as to realize the butt joint of the tubular pump and the pre-buried pipeline, which causes certain inconvenience for installation work. Secondly, all parts in rigid connection can influence each other, produce great excitation. Furthermore, installation errors and environmental factors (temperature, ground subsidence, etc.) can cause stresses between the through-flow pump assembly and the concrete matrix, thereby increasing vibration noise. In addition, due to the characteristics of the water pump and the structural features of the pump station, pressure pulsations occur in the flow channels, i.e. the water exerts a periodic excitation force on the tubular pump unit, which also increases vibrations and noise.

Disclosure of Invention

The invention aims to provide a tubular pump unit with a noise reduction function, which solves the problems of inconvenient installation and high vibration noise of the conventional tubular pump unit.

The purpose of the invention can be realized by the following technical scheme:

a cross-flow pump unit with noise reduction function comprises a cross-flow pump, a water inlet end embedded sleeve and a water outlet end embedded sleeve, wherein the water inlet end embedded sleeve and the water outlet end embedded sleeve are respectively positioned at two ends of the cross-flow pump;

the structure of the first noise reduction part and the structure of the second noise reduction part are the same, the first noise reduction part and the second noise reduction part respectively comprise a first interface flange and a second interface flange which are oppositely arranged, a damping corrugated pipe is arranged between the first interface flange and the second interface flange, two ends of the damping corrugated pipe are respectively in sealing connection with the first interface flange and the second interface flange, an elastic air bag is arranged inside the damping corrugated pipe, two ends of the elastic air bag are respectively in sealing connection with the first interface flange and the second interface flange, the elastic air bag and the damping corrugated pipe belong to a flexible system and have excellent bending performance, even if a certain deflection angle exists between the axial lines of the through-flow pump and the pump station pipeline, the through-flow pump and the pump station pipeline can be quickly connected, when the through-flow pump unit is subjected to external impact, the noise reduction parts can generate elastic deformation and absorb the impact.

As a further scheme of the invention, a concrete base body at the bottom of the machine pit is provided with a mounting hole, a rubber block is fixed in the mounting hole, the bottom end of an anchor bolt is fixedly connected with the center of the rubber block, a tubular pump is fixed on the rubber block by the top end of the anchor bolt through a nut, the height of the rubber block is greater than the depth of the mounting hole, when the tubular pump is impacted externally, the rubber block between the tubular pump and the concrete base body can generate elastic deformation to absorb the impact, and the shock excitation between the tubular pump and the concrete base body is reduced.

As a further scheme of the invention, the elastic air bag is made of natural rubber, a cavity is arranged on the tube wall of the elastic air bag, the elastic air bag is used as a first layer of elastic body, the elastic air bag can elastically contract to compensate displacement and release part of stress caused by installation error and can also buffer the pulse pressure of water, the tube wall of the damping corrugated tube is a single-layer corrugated curved surface, the damping corrugated tube is made of galvanized low-carbon steel, the corrosion resistance of the corrugated tube can be improved by galvanizing, the service life of the corrugated tube is prolonged, the damping corrugated tube and the elastic air bag form a second layer of elastic body, and the pulse pressure of water is further buffered.

As a further scheme of the invention, the water inlet end embedded sleeve comprises a metal pipe, a flange plate, a first wing ring and a second wing ring, the water inlet end embedded sleeve is fixedly connected with the concrete substrate, the first wing ring and the second wing ring can enable the combination between the water inlet end embedded sleeve and the concrete substrate to be more compact and stable, meanwhile, the water inlet end embedded sleeve and the concrete substrate are prevented from water leakage due to water permeation between the water inlet end embedded sleeve and the concrete substrate, and the water outlet end embedded sleeve and the water inlet end embedded sleeve are identical in structure and are fixedly connected with the concrete substrate.

The invention has the beneficial effects that:

(1) the invention provides a tubular pump unit with a noise reduction function, which improves the installation efficiency and quality of the tubular pump unit by introducing a noise reduction part between a tubular pump and a pre-embedded sleeve at a water inlet end and a water outlet end;

(2) because the noise reduction part of the tubular pump unit has good elasticity, the noise reduction part of the tubular pump unit can reduce the internal stress generated by the operation of the tubular pump unit and environmental factors (temperature, ground settlement and the like), when water flow with impact force flows through the tubular pump unit, the noise reduction part can generate elastic deformation, isolate and absorb the excitation and noise between the tubular pump and other parts of the tubular pump unit and between the tubular pump unit and a concrete matrix, and reduce the impulse noise caused by pressure pulsation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a cross-flow pump assembly having a noise reduction function according to the present invention;

FIG. 2 is a cross-sectional view of the pre-buried sleeve at the water inlet end of the present invention;

FIG. 3 is a cross-sectional view of a first noise reduction feature of the present invention;

fig. 4 is a partially enlarged view of a portion a in fig. 1.

In the figure: 1. embedding a sleeve at the water inlet end; 101. a metal tube; 102. a flange plate; 103. a first wing ring; 104. a second wing ring; 2. a first noise reduction feature; 201. a first interface flange; 202. a damping bellows; 203. an elastic air bag; 231. a cavity; 204. a second interface flange; 3. a tubular pump; 4. a second noise reduction feature; 5. embedding a sleeve at the water outlet end; 6. a concrete matrix; 7. anchor bolts; 701. a rubber block; 702. and (7) installing holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 4, a tubular pump unit with noise reduction function comprises a tubular pump 3, and a water inlet end embedded sleeve 1 and a water outlet end embedded sleeve 5 which are respectively positioned at two ends of the tubular pump 3, wherein a first noise reduction part 2 and a second noise reduction part 4 are respectively arranged at two ends of the tubular pump 3, a plurality of uniformly distributed foundation bolts 7 are arranged below the tubular pump 3, a machine pit is formed in a concrete base 6, the tubular pump 3 is arranged in the machine pit through the foundation bolts 7, and a water inlet pipe and a water outlet pipe are respectively arranged in the concrete base 6 at two sides of the machine pit;

referring to fig. 2, the water inlet end embedded sleeve 1 comprises a metal pipe 101, a flange plate 102, a first wing ring 103 and a second wing ring 104, the flange plate 102 is welded at the upper end of the metal pipe 101, the first wing ring 103 and the second wing ring 104 are welded at the outer side of the metal pipe 101, the second wing ring 104 is located at one end far away from the flange plate 102, and the first wing ring 103 and the second wing ring 104 can enable the combination between the water inlet end embedded sleeve 1 and the concrete matrix 6 to be more compact and stable, and meanwhile, water is prevented from permeating and leaking between the water inlet end embedded sleeve 1 and the concrete matrix 6;

the right end of the water inlet end embedded sleeve 1 is connected with a water inlet pipe, the left end of the water inlet end embedded sleeve 1 is connected with a first noise reduction part 2 through a bolt, and the water inlet pipe is communicated with the water inlet end of a tubular pump 3 through the first noise reduction part 2 and the water inlet end embedded sleeve 1;

referring to fig. 3, the first noise reduction component 2 includes a first interface flange 201 and a second interface flange 204 which are oppositely disposed, the first interface flange 201 and the second interface flange 204 have the same structure, a plurality of threaded holes are distributed on the first interface flange 201 and the second interface flange 204 in an annular array, and a damping bellows 202 and an elastic air bag 203 are arranged between the first interface flange 201 and the second interface flange 204;

the damping corrugated pipe 202 is of a cylindrical structure, the pipe wall of the damping corrugated pipe 202 is of a single-layer structure with a corrugated curved surface, when viewed from the outer side of the damping corrugated pipe 202, the pipe wall of the damping corrugated pipe 202 is provided with two wave crests and three wave troughs, two ends of the damping corrugated pipe 202 are hermetically connected with the first interface flange 201 and the second interface flange 204 in a welding mode, the damping corrugated pipe 202 is preferably made of galvanized low-carbon steel, and the galvanizing can increase the corrosion resistance of the corrugated pipe and prolong the service life of the corrugated pipe;

the elastic air bag 203 is of a cylindrical structure, the pipe wall of the elastic air bag 203 is of a double-layer structure provided with a cavity 231, two ends of the elastic air bag 203 are in sealing connection with the first interface flange 201 and the second interface flange 204 in a mode of bonding by an adhesive and fixing by bolts, the material of the elastic air bag 203 is preferably natural rubber, the natural rubber has excellent elasticity, the elastic air bag 203 is used as a first layer of elastic body, can elastically contract to compensate displacement, releases part of stress caused by installation error and can also buffer the pulse pressure of water, the elastic air bag 203 is positioned inside the damping corrugated pipe 202, the elastic air bag 203 is not adhered to the wave trough of the damping corrugated pipe 202, the elastic air bag 203 and the damping corrugated pipe 202 form a second layer of elastic body, and further buffers the pulse pressure of water;

referring to fig. 1 and 4, the left end of the first noise reduction component 2 is connected with the right end of the tubular pump 3 through a bolt, the tubular pump 3 is installed in a machine pit through an anchor bolt 7, a concrete base 6 at the bottom of the machine pit is provided with an installation hole 702, a rubber block 701 is fixed in the installation hole 702, the bottom end of the anchor bolt 7 is fixedly connected with the center of the rubber block 701, the tubular pump 3 is fixed on the rubber block 701 through a nut at the top end of the anchor bolt 7, the height of the rubber block 701 is greater than the depth of the installation hole 702, when the tubular pump 3 is impacted externally, the rubber block 701 between the tubular pump 3 and the concrete base 6 can generate elastic deformation to absorb impact and reduce the excitation between the tubular pump 3 and the concrete base 6;

the left end of the cross flow pump 3 is connected to the right end of the second noise reduction part 4 through a bolt, the second noise reduction part 4 and the first noise reduction part 2 are identical in structure, the left end of the second noise reduction part 4 is connected to the right end of the water outlet end embedded sleeve 5 through a bolt, the left end of the water outlet end embedded sleeve 5 is connected with the water outlet pipe, the water outlet end embedded sleeve 5 and the water inlet end embedded sleeve 1 are identical in structure, and the water outlet pipe is communicated with the water outlet end of the cross flow pump 3 through the second noise reduction part 4 and the water outlet end embedded sleeve 5.

When the tubular pump works, the tubular pump 3 is started, high-speed water flows through the embedded sleeve 1 at the water inlet end and then flows through the first noise reduction part 2, the elastic air bag 203 and the damping corrugated pipe 202 of the first noise reduction part 2 can generate elastic deformation, so that part of impact and vibration can be absorbed, the shock of the water flow to the tubular pump 3 is reduced, and when the water flows through the tubular pump 3 and flows to the second noise reduction part 4, the elastic air bag 203 and the damping corrugated pipe 202 of the second noise reduction part 4 further absorb the impact and vibration, so that the problem of high vibration noise of a tubular pump set is solved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.