WO2023221477A1 - 一种用于自吸泵的高吸程壳体结构 - Google Patents

一种用于自吸泵的高吸程壳体结构 Download PDF

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WO2023221477A1
WO2023221477A1 PCT/CN2022/138666 CN2022138666W WO2023221477A1 WO 2023221477 A1 WO2023221477 A1 WO 2023221477A1 CN 2022138666 W CN2022138666 W CN 2022138666W WO 2023221477 A1 WO2023221477 A1 WO 2023221477A1
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liquid
self
channel
impeller
outlet
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PCT/CN2022/138666
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English (en)
French (fr)
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林荣
颜成刚
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利欧集团浙江泵业有限公司
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Publication of WO2023221477A1 publication Critical patent/WO2023221477A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the present application relates to the technical field of self-priming pumps, and in particular to a high-suction casing structure for a self-priming pump.
  • the self-priming pump has the advantages of easy operation and stable operation.
  • the housing is first filled with water, and the impeller rotates to suck in air and water. Finally, the gas and liquid are separated, the gas is discharged, and the liquid returns to the impeller for circulation, so it is self-priming.
  • the pump includes a liquid inlet channel, a liquid outlet channel and a liquid return channel.
  • the self-priming pump can complete the water transport through the maximum length of pipeline before the water body is consumed.
  • the corresponding pipeline length is the suction stroke of the self-priming pump.
  • the suction stroke of the self-priming pump It is affected by factors such as the relationship between the effective water inlet and effective water output of the self-priming pump and the gas-liquid separation efficiency.
  • the noisy pump body and the self-priming pump include a main body.
  • the main body is provided with ribs.
  • the ribs divide the main body into a liquid suction chamber, a self-priming chamber, and an acceleration chamber connecting the liquid suction chamber and the self-priming chamber.
  • An impeller is provided in the accelerating chamber, and a liquid outlet channel connecting the accelerating chamber and the self-priming chamber and a liquid inlet channel connecting the accelerating chamber and the liquid suction chamber are formed between the ribs and the inner wall of the main body; the liquid outlet channel
  • the water supply flow flows into the liquid outlet channel from the inlet side of the liquid outlet channel, and flows out from the outlet side of the liquid outlet channel;
  • the liquid outlet channel at least has: a relatively wide mouth, which is located on the inlet side of the liquid outlet channel; a relatively narrow mouth , which is located on the outlet side of the liquid outlet channel, and the area size of the relative narrow mouth is smaller than the relative expansion portion;
  • the middle flow channel connects the relative expansion and the relative narrow mouth, and the volume of the middle flow channel gradually increases along the direction of the water flow.
  • the present invention provides a high-suction casing structure for a self-priming pump.
  • the impeller of the self-priming pump has greater effective kinetic energy, and the gas
  • the gas effectively overflows due to the difference in kinetic energy, which improves the efficiency of gas-liquid separation and increases the suction head and lift of the self-priming pump.
  • Another object of the present invention is to control the number of collisions of water flow in the liquid outlet channel and improve the efficiency of gas-liquid separation.
  • the present invention adopts the following technical solutions.
  • a high-suction casing structure for a self-priming pump is provided with an impeller cavity.
  • the peripheral wall of the impeller cavity is provided with a liquid inlet, a liquid outlet, and a liquid return port.
  • the process shell structure is provided with a liquid inlet channel corresponding to the liquid inlet, a liquid outlet channel corresponding to the liquid outlet, and a liquid return channel corresponding to the liquid return port.
  • a dividing plate is provided between the channel and the liquid return channel.
  • the characteristic is that the liquid outlet and the liquid return outlet are arranged adjacently.
  • the liquid outlet and the liquid return outlet form a connected outlet.
  • the central angle of the impeller cavity occupied by the outlet is in line with the inlet.
  • the ratio of the liquid port to the central angle of the impeller cavity is not less than 0.9 and not greater than 1.
  • the central angle occupied by the outlet is slightly less than or equal to the central angle occupied by the liquid inlet, so that the fluid flowing out of the outlet is an effective fluid.
  • the fluid flowing out of the corresponding outlet is fully compared with the air in the liquid inlet, and the kinetic energy of the self-priming pump impeller is efficient. High, when the gas-liquid mixing flows into the liquid outlet channel, the gas effectively overflows due to the difference in kinetic energy, which improves the efficiency of gas-liquid separation, increases the suction lift and lift of the self-priming pump, and avoids the impeller doing useless work because the inlet width is smaller than the outlet width.
  • the ratio of the central angle of the impeller cavity occupied by the outlet to the central angle of the impeller cavity occupied by the liquid inlet is 1.
  • the flow rates at the outlet and liquid inlet are equal, which prevents the impeller from driving excess water to do useless work, ensures that the kinetic energy of the water driven by the rotation of the impeller is sufficient and effective, improves the efficiency of subsequent gas-liquid separation, shortens the suction stroke time, and expands the lift.
  • one end of the rib facing the impeller cavity is provided with a six-shaped head.
  • the head of the six-shaped head matches the peripheral wall of the impeller cavity.
  • the side of the six-shaped head is provided with a guiding surface for water ejection.
  • the head of the six-shaped head is The angle between the radial direction of the impeller and the guide surface at the middle position of the lower end ranges from 14 degrees to 30 degrees.
  • the six-shaped head is used to guide the water when it enters the liquid outlet channel.
  • the angle between the traditional guide surface and the axis of the rib is about 7 degrees.
  • the water body collides back and forth in the liquid outlet channel too many times, causing kinetic energy to accumulate in the liquid outlet.
  • the opening of the channel makes the water return efficiency low and the suction stroke takes too long, which affects the application efficiency of the self-priming pump.
  • this application has expanded the angle between the water guide surface and the axis of the floor plate. angle, the number of collisions of the water flow is small, and the number of collisions of the water flow in the liquid outlet channel is controlled.
  • the water body can collide in the liquid outlet channel, while ensuring the forward speed of the water body and preventing the accumulation of kinetic energy liquid in the liquid outlet channel and affecting the outflow of the water body. Improve the efficiency of gas-liquid separation.
  • the water guide surface and the side wall of the six-shaped head form an included angle of 170 degrees. Improve the collision efficiency of the water body, that is, improve the gas-liquid separation efficiency.
  • the peripheral wall of the impeller cavity corresponding to the liquid return port is provided with a flow guide tip.
  • the diversion sharp corners have a reliable converging and guiding effect, ensuring the consistency of the direction of water outflow.
  • transitional rounded corners are usually provided, but the transitional rounded corners will cause the water flow to disperse, causing the impeller cavity to eject
  • the water flow and the water flow in the liquid return channel interfere with each other, causing internal consumption of water flow energy, which in turn affects the suction and lift of the self-priming pump.
  • the design of this application avoids this problem.
  • an impeller is provided in the impeller cavity, and one end of the partition plate facing the impeller cavity is located on a tangent to the peripheral wall of the impeller cavity corresponding to the liquid return port.
  • the partition plate is set too high, the water vapor will be reflected to the vicinity of the liquid return channel after colliding with the six-character head, and will swirl at the connection between the liquid return channel and the liquid outlet channel, affecting the impeller water filling and gas-liquid separation; if the separation plate is set too low, it will Some water vapor is blocked into the liquid return channel, which will also affect the impeller water filling and gas-liquid separation.
  • the position selected in this application is combined with the reliable guidance of the diversion tip so that as much water vapor as possible will not flow directly from the impeller cavity to the liquid return channel. channel to ensure gas-liquid separation efficiency and improve the suction stroke of the self-priming pump.
  • the high-suction casing structure is provided with a return chamber corresponding to the tail end of the liquid outlet channel and the liquid return channel, and a transverse baffle is provided on one side of the rib facing the return chamber.
  • the horizontal baffle guides the return flow of water vapor flowing out of the liquid outlet channel, and rebounds the injected water vapor back into the liquid channel, reducing water overflow and thereby increasing the suction stroke of the self-priming pump.
  • the angle between the rib and the transverse baffle on the side of the transverse baffle facing the impeller chamber is an obtuse angle. Ensure that the water flow ejected from the liquid outlet channel is blocked into the liquid return channel to prevent it from being directly blocked back to the liquid outlet channel to ensure the reliability of water vapor circulation.
  • a protruding rib plate is provided on one side of the six-shaped head toward the liquid outlet channel.
  • the tail end of the six-shaped head and the side of the rib form a diffusion groove.
  • the tail end of the six-shaped head and the ribs form a diffusion groove. There are transition fillets between the sides.
  • the setting of the diffusion groove allows the gas-liquid mixture flowing out of the rear end of the liquid outlet channel to quickly enter from the high pressure of the small cross-section of the liquid outlet channel to the low pressure of the large cross-section of the diffusion groove.
  • the water-gas separation effect is high, which is beneficial to increasing the suction capacity of the self-priming pump. Procedure.
  • the invention has the following beneficial effects: by setting the ratio of the inlet and outlet of the impeller cavity, the impeller of the self-priming pump has greater effective kinetic energy.
  • the gas effectively overflows due to the difference in kinetic energy, thereby improving gas-liquid separation.
  • efficiency improve the suction lift and head of the self-priming pump; control the number of collisions of water flow in the liquid outlet channel, and improve the efficiency of gas-liquid separation.
  • Figure 1 is a schematic diagram of the internal structure of the present invention.
  • Figure 2 is an enlarged schematic view of point A in Figure 1.
  • Figure 3 is a schematic diagram of the internal structure of the present invention when assembled with the impeller.
  • a high suction lift housing structure is used for a self-priming pump.
  • the high suction lift housing structure 1 is provided with an impeller chamber 2, and the peripheral wall of the impeller chamber 2 is provided with a liquid inlet 3 , liquid outlet and liquid return port, the high suction lift shell structure 1 is provided with a liquid inlet channel 4 corresponding to the liquid inlet 3, a liquid outlet channel 5 corresponding to the liquid outlet, and a liquid return channel 6 corresponding to the liquid return port,
  • a rib plate 7 is provided between the liquid inlet channel 4 and the liquid outlet channel 5
  • a partition plate 8 is provided between the liquid outlet channel 5 and the liquid return channel 6, the liquid outlet and the liquid return outlet are arranged adjacently, and the liquid outlet is adjacent to the liquid outlet.
  • the liquid return port forms a connected outlet 9.
  • the ratio of the central angle of the impeller cavity 2 occupied by the outlet 9 to the central angle of the impeller cavity 2 occupied by the liquid inlet 3 is not less than 0.9 and not greater than 1. Furthermore, in this embodiment, the ratio of the central angle of the impeller cavity 2 occupied by the outlet 9 to the central angle of the impeller cavity 2 occupied by the liquid inlet 3 is 1.
  • An impeller 10 is disposed in the impeller cavity 2, and one end of the partition plate 8 facing the impeller cavity 2 is located on a tangent line at the peripheral wall of the impeller cavity 2 corresponding to the liquid return port.
  • One end of the partition plate 8 facing the impeller chamber 2 is semi-cylindrical to ensure the reliability of water flow.
  • One end of the rib 7 facing the impeller cavity 2 is provided with a six-shaped head 11.
  • the head of the six-shaped head 11 matches the peripheral wall of the impeller cavity 2.
  • the side of the head of the six-shaped head 11 is provided with a guiding surface 12 for water ejection.
  • the six-shaped head 11 The angle a between the impeller radial direction and the guide surface 12 at the middle position of the lower end of the head ranges from 14 degrees to 30 degrees. In this embodiment, the angle a between the radial direction of the impeller and the guide surface located at the middle position of the lower end of the head of the six-shaped head is 14 degrees.
  • the angle b between the guide surface and the side wall of the six-shaped head is 170 degrees.
  • the 2 peripheral walls of the impeller chamber corresponding to the liquid return port are provided with flow guide corners 14.
  • the high-suction casing structure 1 is provided with a return chamber 15 corresponding to the tail end of the liquid outlet channel 5 and the liquid return channel 6 , and a transverse baffle 16 is provided on the side of the rib 7 facing the return chamber 15 .
  • the included angle between the rib plate 7 and the transverse baffle 16 located on the side of the transverse baffle 16 facing the impeller chamber 2 is an obtuse angle.
  • the angle c between the transverse baffle and the floor is 110 degrees.
  • the transverse baffle 16 is located at the upper end of the rib plate 7, and a connecting section 17 of the vertical transverse baffle 16 is provided at the upper end of the rib plate 7 for connection with the upper end of the housing.
  • the six-shaped head 11 protrudes toward the side of the liquid outlet channel 5 and the rib 7 is disposed toward the side of the liquid outlet channel 5.
  • the rear end of the six-shaped head 11 and the side of the rib 7 form a diffusion groove 13. There is a transition fillet between the tail end and the side of the rib 7.
  • the high-suction casing structure 1 When this application is in use, the high-suction casing structure 1 is filled with water.
  • the self-priming pump is started, the impeller 10 provided in the impeller cavity 2 rotates, and the water body in the liquid inlet channel 4 is transported to the impeller cavity 2.
  • the flow direction of the water flow is as follows As shown by the arrow in Figure 1, a negative pressure is formed in the liquid inlet channel 4.
  • the negative pressure causes the gas in the water inlet pipe connected to the high suction lift shell structure 1 to be pumped into the impeller chamber 2, and then transported to the outlet along with the impeller 10.
  • the water flow gathers along the guide tip 14 and flows to the guide surface 12. After being reflected by the guide surface 12, it flows into the diffusion groove 13 after a collision with the partition plate 8.
  • the gas and liquid Quickly separate, the gas overflows quickly, and the water flows upward to the cross baffle 16. After the collision and reflection of the cross baffle 16, it quickly flows back into the liquid return channel 6, and returns to the impeller chamber 2 from the liquid return channel 6 to continue circulation, so that it can be discharged continuously. Air in the water inlet pipe.
  • the central angle occupied by the outlet 9 is equal to the central angle occupied by the liquid inlet 3.
  • the impeller 10 has a total of 36 evenly arranged blades.
  • the outlet 9 and the liquid inlet 3 correspond to four blades respectively, so that the outlet 9 flows out.
  • the fluids are all effective fluids.
  • the fluid flowing out of the corresponding outlet 9 is fully compared with the air in the liquid inlet 3.
  • the self-priming pump impeller 10 has high kinetic energy efficiency.
  • the gas effectively overflows due to the difference in kinetic energy.
  • to prevent the impeller 10 from doing useless work because the inlet width is smaller than the outlet 9 width, improve the efficiency of gas-liquid separation, and increase the suction head and lift of the self-priming pump.
  • the angle between the guiding surface 12 and the axis of the rib plate 7 is enlarged, and the number of collisions of the water flow is less.
  • the number of collisions of the water flow in the liquid outlet channel 5 is controlled, and the water body can collide in the liquid outlet channel 5, while ensuring the forward speed of the water body and preventing The kinetic energy liquid accumulates in the liquid outlet channel 5 and affects the outflow of the water body, thereby improving the efficiency of gas-liquid separation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

本发明公开了一种用于自吸泵的高吸程壳体结构，所述高吸程壳体结构内设有叶轮腔，叶轮腔的周壁上设有进液口、出液口和回液口，高吸程壳体结构内设有对应进液口的进液通道、对应出液口的出液通道和对应回液口的回液通道，进液通道和出液通道之间设有肋板，出液通道和回液通道之间设有分隔板，出液口和回液口相邻设置，出液口与回液口形成连通的出口，出口所占叶轮腔的圆心角与进液口所占叶轮腔的圆心角的比值不小于0.9且不大于1。本发明的好处是通过叶轮腔进口和出口比例的设置，使得自吸泵叶轮具有较大的有效动能，气液混合在流入出液通道时因为动能差异使得气体有效溢出，提高气液分离的效率，提高自吸泵的吸程和扬程。

Description

一种用于自吸泵的高吸程壳体结构 技术领域
本申请涉及自吸泵技术领域，尤其涉及一种用于自吸泵的高吸程壳体结构。
背景技术
自吸泵具有操作方便、运行稳定的好处，自吸泵在应用时先在壳体内装满水，叶轮转动吸入空气和水体，最终气液分离，气体排出，液体回流到叶轮循环，因此自吸泵包括进液通道、出液通道和回液通道，自吸泵在水体损耗完前能够通过最大长度的管道完成水流运送对应的管道长度即是自吸泵的吸程，自吸泵的吸程受到自吸泵有效进水量和有效出水量之间的关系和气液分离效率等因素影响。
中国专利文献中，专利号为CN202111605414.3于2022年3月1日公开的名为《一种可有效降低噪音的泵体以及自吸泵》的发明专利，该申请公开了一种可有效降低噪音的泵体以及自吸泵，包括主体，主体中设有肋板，肋板将所述主体分为吸液腔、自吸腔以及连接所述吸液腔和自吸腔的加速腔，所述加速腔内设有叶轮，所述肋板与主体的内壁之间成形有连通加速腔与自吸腔的出液流道以及连通加速腔与吸液腔的进液通道；所述出液通道用于供水流自出液通道的入口侧流入出液通道，并从出液通道的出口侧流出；所述出液通道至少具有：相对扩口,其位于出液通道的入口侧；相对窄口，其位于出液通道的出口侧，且相对窄口的面积大小小于所述相对扩口部；中间流道，连接所述相对扩口与相对窄口，中间流道的容积大小沿水流方向逐渐减少。其不足之处在于，水流从加速腔流动到出液通道，沿相对扩口进入，由于水流的入射角度与肋板的碰撞角度角度，会造成水流在中间流道内形成往复的多次碰撞，水体的动能损耗大，气液分离也不充分，而堆积在中间流道入口的水汽还容易造成水体直接逆流到回流孔，显著影响自吸泵的循环；加速腔对应出液通道的水流入射的端面上设有圆形倒角，水流在圆形倒角时失去导向，容易沿圆形倒角扩散，使得水流分散，影响水流从加速腔流动到出液通道的效率，影响自吸泵的吸程和扬程；
此外，现有技术中的自吸泵的壳体缺少对泵体叶轮腔中进口和出口比例关系的研究，而本申请通过对该比例的研究发现其显著影响自吸泵的吸程和扬程并借此作出了相应改进。
发明内容
基于现有技术中上述不足，本发明提供了一种用于自吸泵的高吸程壳体结构，通过叶轮腔进口和出口比例的设置，使得自吸泵叶轮具有较大的有效动能，气液混合在流入出液通道时因为动能差异使得气体有效溢出，提高气液分离的效率，提高自吸泵的吸程和扬程。
本发明的另一个目的是，控制水流在出液通道的碰撞次数，提高气液分离的效率。
为了实现上述发明目的，本发明采用以下技术方案。
一种用于自吸泵的高吸程壳体结构，所述高吸程壳体结构内设有叶轮腔，叶轮腔的周壁上设有进液口、出液口和回液口，高吸程壳体结构内设有对应进液口的进液通道、对应出液口的出液通道和对应回液口的回液通道，进液通道和出液通道之间设有肋板，出液通道和回液通道之间设有分隔板，其特征是，出液口和回液口相邻设置，出液口与回液口形成连通的出口，出口所占叶轮腔的圆心角与进液口所占叶轮腔的圆心角的比值不小于0.9且不大于1。
出口所占的圆心角略小于或等于进液口所占的圆心角，使得出口流出的流体均为有效流体，对应出口流出的流体充分与进液口的空气对比，自吸泵叶轮动能有效率高，气液混合在流入出液通道时因为动能差异使得气体有效溢出，提高气液分离的效率，提高自吸泵的吸程和扬程，避免因为进口宽度小于出口宽度而使得叶轮做无用功。
作为优选，出口所占叶轮腔的圆心角与进液口所占叶轮腔的圆心角的比值为1。吸程状态时，出口和进液口的流量相当，避免叶轮带动多余水体做无用功，保证叶轮转动带动的水体动能充足有效，提高后续气液分离的效率，缩短吸程时间，并扩大扬程。
作为优选，肋板朝向叶轮腔的一端设有六字头，六字头的头部与叶轮腔周壁配合，六字头头部的侧面设有用于水流射出的导水面，六字头的头部下端中间位置所在的叶轮径向与导水面的夹角范围在14度到30度之间。六字头用于完成水流进入出液通道时的导向，传统的导水面与肋板轴线的夹角为7度左右，水体在出液通道内的往复碰撞次数过多，造成动能堆积在出液通道的口子上，使得回水效率低，吸程所占的时间过长，影响自吸泵的应用效率，相比原先的7度左右夹角，本申请扩大了导水面与肋板轴线的夹角，水流碰撞次数少，控制水流在出液通道的碰撞次数，水体在出液通道内能够碰撞，同时能够保证水体前行的速度，防止动能液体在出液通道内堆积而影响水体的流出，提高气液分离的效率。
作为优选，导水面与六字头侧壁呈170度夹角。提高水体的碰撞效率，也就是提高气液分离效率。
作为优选，对应回液口的叶轮腔周壁上设有导流尖角。导流尖角具有可靠的汇流导向的作用，保证水流流出的方向一致性，传统方案中为了提高结构寿命，通常是设置过渡圆角，但是过渡圆角会导致水流分散，使得叶轮腔内射出的水流和回液通道内的水流彼此干扰冲突，造成水流动能内耗，进而影响自吸泵的吸程和扬程，本申请的设计避免了这个问题。
作为优选，叶轮腔内设有叶轮，分隔板朝向叶轮腔的一端位于对应回液口的叶轮腔周壁处的切线上。分隔板设置过高，水汽会在碰撞六字头后反射到回液通道附近，在回液通道和出液通道的连通处打转，影响叶轮灌水和气液分离；分隔板设置过低，会存在部分水汽被 挡入到回液通道，同样会影响叶轮灌水和气液分离，本申请所选位置配合导流尖角的可靠导向，使得尽可能多的水汽不会直接从叶轮腔流入到回液通道，保证气液分离效率，提高自吸泵吸程。
作为优选，高吸程壳体结构内设有对应在出液通道和回液通道尾端的回流腔，肋板朝向回流腔的一侧设有横挡板。横挡板对出液通道流出的水汽进行回流导向，将射出的水汽反弹回回液通道内，减小水体溢出，从而增大自吸泵的吸程。
作为优选，位于横挡板朝向叶轮腔一侧的肋板和横挡板之间的夹角为钝角。确保出液通道射出的水流被挡入到回液通道，防止直接被挡回到出液通道，保证水汽循环的可靠性。
作为优选，六字头朝向出液通道的一侧凸出肋板朝向出液通道的一侧设置，六字头的尾端和肋板侧面形成扩散凹槽，六字头的尾端和肋板侧面之间设有过渡圆角。扩散凹槽的设置使得出液通道后端流出的气液混合物从出液通道的小截面高压迅速进入到扩散凹槽的大截面低压，水气分离效果高，有利于增大自吸泵的吸程。
本发明具有如下有益效果：通过叶轮腔进口和出口比例的设置，使得自吸泵叶轮具有较大的有效动能，气液混合在流入出液通道时因为动能差异使得气体有效溢出，提高气液分离的效率，提高自吸泵的吸程和扬程；控制水流在出液通道的碰撞次数，提高气液分离的效率。
附图说明
图1是本发明的内部结构示意图。
图2是图1中A处的放大示意图。
图3是本发明与叶轮组装时的内部结构示意图。
图中：高吸程壳体结构1 叶轮腔2 进液口3 进液通道4 出液通道5 回液通道6 肋板7 分隔板8 出口9 叶轮10 六字头11 导水面12 扩散凹槽13 导流尖角14 回流腔15 横挡板16 连接段17 六字头的头部下端中间位置所在的叶轮径向与导水面的夹角a 导水面与六字头侧壁之间的夹角b 横挡板与肋板之间的夹角c。
具体实施方式
下面结合附图和具体实施例对本发明进行进一步的阐述。
实施例1，
如图1到图3所示，一种用于自吸泵的高吸程壳体结构，高吸程壳体结构1内设有叶轮腔2，叶轮腔2的周壁上设有进液口3、出液口和回液口，高吸程壳体结构1内设有对应进液口3的进液通道4、对应出液口的出液通道5和对应回液口的回液通道6，进液通道4和出液通道 5之间设有肋板7，出液通道5和回液通道6之间设有分隔板8，出液口和回液口相邻设置，出液口与回液口形成连通的出口9，出口9所占叶轮腔2的圆心角与进液口3所占叶轮腔2的圆心角的比值不小于0.9且不大于1。进一步的，本实施例中，出口9所占叶轮腔2的圆心角与进液口3所占叶轮腔2的圆心角的比值为1。叶轮腔2内设有叶轮10，分隔板8朝向叶轮腔2的一端位于对应回液口的叶轮腔2周壁处的切线上。分隔板8朝向叶轮腔2的一端为半圆柱形，保证水流流过的可靠性。肋板7朝向叶轮腔2的一端设有六字头11，六字头11的头部与叶轮腔2周壁配合，六字头11头部的侧面设有用于水流射出的导水面12，六字头的头部下端中间位置所在的叶轮径向与导水面12的夹角a范围在14度到30度之间。在本实施例中，六字头的头部下端中间位置所在的叶轮径向与导水面的夹角a为14度。导水面与六字头侧壁之间的夹角b为170度。对应回液口的叶轮腔2周壁上设有导流尖角14。高吸程壳体结构1内设有对应在出液通道5和回液通道6尾端的回流腔15，肋板7朝向回流腔15的一侧设有横挡板16。位于横挡板16朝向叶轮腔2一侧的肋板7和横挡板16之间的夹角为钝角。横挡板与肋板之间的夹角c为110度。横挡板16位于肋板7上端，肋板7上端设置垂直横挡板16的连接段17用于和壳体上端连接。六字头11朝向出液通道5的一侧凸出肋板7朝向出液通道5的一侧设置，六字头11的尾端和肋板7侧面形成扩散凹槽13，六字头11的尾端和肋板7侧面之间设有过渡圆角。
本申请在使用时，高吸程壳体结构1内灌满水，自吸泵启动时，叶轮腔2内设置的叶轮10转动，进液通道4水体被输送到叶轮腔2，水流的流向如图1中的箭头所示，进液通道4内形成负压，负压使得高吸程壳体结构1所连接的进水管道内的气体被抽送到叶轮腔2内，随叶轮10输送到出液口，水流沿导流尖角14聚流流向导水面12，经过导水面12反射后，经过分隔板8的一次碰撞就流入到扩散凹槽13，由于管道压力的突然减小，气液迅速分离，气体快速溢出，水体向上流动到横挡板16，经过横挡板16的碰撞反射快速回流到回液通道6内，从回液通道6回到叶轮腔2继续循环，使得能够不断排出进水管道内的空气。本申请实施例中出口9所占的圆心角等于进液口3所占的圆心角，叶轮10共计均匀布置的36块叶片，出口9和进液口3分别对应四块叶片，使得出口9流出的流体均为有效流体，对应出口9流出的流体充分与进液口3的空气对比，自吸泵叶轮10动能有效率高，气液混合在流入出液通道5时因为动能差异使得气体有效溢出，避免因为进口宽度小于出口9宽度而使得叶轮10做无用功，提高气液分离的效率，提高自吸泵的吸程和扬程。扩大了导水面12与肋板7轴线的夹角，水流碰撞次数少，控制水流在出液通道5的碰撞次数，水体在出液通道5内能够碰撞，同时能够保证水体前行的速度，防止动能液体在出液通道5内堆积而影响水体的流出，提高 气液分离的效率。

Claims (9)

  1. 一种用于自吸泵的高吸程壳体结构，所述高吸程壳体结构内设有叶轮腔，叶轮腔的周壁上设有进液口、出液口和回液口，高吸程壳体结构内设有对应进液口的进液通道、对应出液口的出液通道和对应回液口的回液通道，进液通道和出液通道之间设有肋板，出液通道和回液通道之间设有分隔板，其特征是，出液口和回液口相邻设置，出液口与回液口形成连通的出口，出口所占叶轮腔的圆心角与进液口所占叶轮腔的圆心角的比值不小于0.9且不大于1。
  2. 根据权利要求1所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述出口所占叶轮腔的圆心角与进液口所占叶轮腔的圆心角的比值为1。
  3. 根据权利要求1所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述肋板朝向叶轮腔的一端设有六字头，六字头的头部与叶轮腔周壁配合，六字头头部的侧面设有用于水流射出的导水面，六字头的头部下端中间位置所在的叶轮径向与导水面的夹角范围在14度到30度之间。
  4. 根据权利要求3所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述导水面与六字头侧壁呈170度夹角。
  5. 根据权利要求1所述的一种用于自吸泵的高吸程壳体结构，其特征是，对应所述回液口的叶轮腔周壁上设有导流尖角。
  6. 根据权利要求1所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述叶轮腔内设有叶轮，分隔板朝向叶轮腔的一端位于对应回液口的叶轮腔周壁处的切线上。
  7. 根据权利要求1所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述高吸程壳体结构内设有对应在出液通道和回液通道尾端的回流腔，肋板朝向回流腔的一侧设有横挡板。
  8. 根据权利要求7所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述位于横挡板朝向叶轮腔一侧的肋板和横挡板之间的夹角为钝角。
  9. 根据权利要求3或4所述的一种用于自吸泵的高吸程壳体结构，其特征是，所述六字头朝向出液通道的一侧凸出肋板朝向出液通道的一侧设置，六字头的尾端和肋板侧面形成扩散凹槽，六字头的尾端和肋板侧面之间设有过渡圆角。
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