Magnetic suspension self-priming pump with high-capacity gas-liquid separation chamber

Abstract

The utility model provides a magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber, which comprises a pump body with a pump cavity, a rotor, a motor and a pump cover, the rotor is suspended and arranged in the pump cavity in a non-contact manner, the pump cover is arranged on one side of the pump body, the motor is arranged on the other side of the pump body, and the motor is arranged in the pump cavity. The pump body comprises a gas-liquid separation part and a water outlet section, a gas-liquid separation chamber is formed in the gas-liquid separation part and the water outlet section, and the section of the gas-liquid separation chamber in the horizontal direction is rectangular. Therefore, when the thickness size of the pump body in the rotation axis direction of the rotor is limited, the gas-liquid separation cavity with the maximum section size can be obtained, the gas-liquid separation cavity with the large volume is obtained, and the gas-liquid separation effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic levitation pumps, and in particular to a magnetic levitation self-priming pump with a large-capacity gas-liquid separation chamber. Background Art

[0002] The magnetic levitation self-priming pump is a magnetic levitation pump with self-priming function. Its characteristic is that after starting, it does not need to fill the pump inlet pipe with water in advance or use external force to draw a vacuum. Instead, it relies on its own design characteristics to discharge the air in the pump chamber and suck in the liquid whose level is lower than the pump body and lift it to the required height.

[0003] When the magnetic levitation self-priming pump starts working, the liquid will mix with the gas in the pump cavity and the pipe connected to the inlet to form a gas-liquid mixture. Too much gas in the gas-liquid mixture will affect the pump's head and flow stability. If the separated gas is not discharged in time, it will form air resistance in the pump, reduce the pump's water absorption capacity and liquid delivery efficiency, and prolong the time required for the pump to self-prime, which is not conducive to the pump maintaining a stable head and flow output.

[0004] Therefore, it is necessary to set up a gas-liquid separation chamber to improve the effect of gas and liquid separation. In the prior art, the gas-liquid separation chamber is usually cylindrical, and a gas-liquid separation chamber with a circular cross-section is arranged inside. Due to the thickness of the pump body in the direction of the rotor rotation axis, the cross-sectional size of the gas-liquid separation chamber is usually limited, resulting in a small capacity of the gas-liquid separation chamber and a poor gas-liquid separation effect. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the present application provides a magnetic levitation self-priming pump with a large-capacity gas-liquid separation chamber, including a pump body with a pump cavity, a rotor, a motor and a pump cover, the rotor is suspended and non-contactly arranged in the pump cavity, the pump cover is arranged on one side of the pump body, and the motor is arranged on the other side of the pump body. The pump body includes a gas-liquid separation part and a water outlet node, and a gas-liquid separation chamber is formed in the gas-liquid separation part and the water outlet node, and the cross-sectional shape of the gas-liquid separation chamber in the horizontal direction is a rectangle.

[0006] In some embodiments of the present application, a barrier component is provided in the gas-liquid separation chamber.

[0007] In some embodiments of the present application, the gas-liquid separation part is arranged at the highest point of the pump cavity.

[0008] In some embodiments of the present application, the cross-sectional shape of the gas-liquid separation portion is rectangular.

[0009] In some embodiments of the present application, the water outlet node and the gas-liquid separation part are fixed by at least one of welding, bonding, and fastener connection.

[0010] In some embodiments of the present application, the baffle assembly includes two baffle plates symmetrically arranged along the rotation axis of the rotor.

[0011] In some embodiments of the present application, the baffle assembly includes a plurality of baffle plates staggeredly arranged along the height direction of the gas-liquid separation chamber, and the plurality of baffle plates are fixedly disposed on the inner wall of the gas-liquid separation chamber.

[0012] In some embodiments of the present application, the baffle assembly includes a plurality of baffle plates, which are arranged alternately along the height direction of the gas-liquid separation chamber, one end of the baffle plate is hinged to the inner wall of the gas-liquid separation chamber, and the other end is connected to the inner wall of the gas-liquid separation chamber via an elastic element.

[0013] In some embodiments of the present application, the baffle assembly includes a baffle plate that rises in a spiral along the inner wall of the gas-liquid separation chamber.

[0014] In some embodiments of the present application, the barrier assembly includes an airbag, and the inflation and depression of the airbag are controlled by an external air source.

[0015] In some embodiments of the present application, a first gas-liquid separation cavity is provided in the gas-liquid separation part, a second gas-liquid separation cavity is provided in the water outlet node, and the first gas-liquid separation cavity and the second gas-liquid separation cavity together form a gas-liquid separation chamber.

[0016] In some embodiments of the present application, the water outlet section is provided with a first water outlet chamber, a second water outlet chamber and a third water outlet chamber which are interconnected, and the first water outlet chamber is interconnected with the second gas-liquid separation chamber.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects: the magnetic levitation self-priming pump with a large-capacity gas-liquid separation chamber of the present application includes a gas-liquid separation part and a water outlet section, and a gas-liquid separation cavity is formed in the gas-liquid separation part and the water outlet section. The cross-sectional shape of the gas-liquid separation cavity in the horizontal direction is rectangular. In this way, when limited by the thickness dimension of the pump body in the direction of the rotor rotation axis, a gas-liquid separation cavity with a maximum cross-sectional dimension can be obtained, and a large-capacity gas-liquid separation cavity can be obtained to improve the gas-liquid separation effect.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of this document are used to provide a further understanding of this document. The exemplary embodiments and descriptions of this document are used to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0020] Figure 1 It is a front view of a magnetically suspended self-priming pump with a large-capacity gas-liquid separation chamber provided by an exemplary embodiment of the present application;

[0021] Figure 2 It is a left view of a magnetically suspended self-priming pump with a large-capacity gas-liquid separation chamber provided by an exemplary embodiment of the present application;

[0022] Figure 3 yes Figure 2 Sectional view at DD in the middle;

[0023] Figure 4 is a front view of a sweeping pump body provided by an exemplary embodiment of the present application;

[0024] Figure 5 It is a left side view of a sweeping pump body provided by an exemplary embodiment of the present application;

[0025] Figure 6 yes Figure 4 Sectional view at the middle BB;

[0026] Figure 7 yes Figure 5 Sectional view at AA;

[0027] Figure 8 yes Figure 7 Sectional view at CC.

[0028] In the figure:

[0029] 10. Pump body; 101. Gas-liquid separation part; 1011. First gas-liquid separation chamber; 102. Pump chamber; 103. Gas-liquid separation chamber; 104. Water outlet section; 1041. Second gas-liquid separation chamber; 1042. First water outlet chamber; 1043. Second water outlet chamber; 1044. Third water outlet chamber; 106. Baffle assembly; 20. Pump cover; 30. Rotor; 40. Motor. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0031] When the magnetic levitation self-priming pump starts working, the liquid will mix with the gas in the pump cavity and the pipe connected to the inlet to form a gas-liquid mixture. Too much gas in the gas-liquid mixture will affect the pump's head and flow stability. If the separated gas is not discharged in time, it will form air resistance in the pump, reduce the pump's water absorption capacity and liquid delivery efficiency, and prolong the time required for the pump to self-prime, which is not conducive to the pump maintaining a stable head and flow output.

[0032] Therefore, it is necessary to set up a gas-liquid separation chamber to improve the effect of gas and liquid separation. In the prior art, the gas-liquid separation chamber is usually cylindrical, with a gas-liquid separation cavity of a circular cross section, and the cross-sectional size of the gas-liquid separation cavity is usually limited due to the thickness of the pump body in the direction of the rotor rotation axis, resulting in a small capacity of the gas-liquid separation cavity and a poor gas-liquid separation effect.

[0033] Based on this, an exemplary embodiment of the present application provides a magnetic levitation self-priming pump with a large-capacity gas-liquid separation chamber, the magnetic levitation self-priming pump includes a gas-liquid separation part and a water outlet node, and a gas-liquid separation cavity is formed in the gas-liquid separation part and the water outlet node. The cross-sectional shape of the gas-liquid separation cavity in the horizontal direction is rectangular. In this way, when limited by the thickness dimension of the pump body in the direction of the rotor rotation axis, a gas-liquid separation cavity with a maximum cross-sectional dimension can be obtained, and a gas-liquid separation cavity with a large capacity can be obtained to improve the gas-liquid separation effect.

[0034] An exemplary embodiment of the present application provides a magnetic suspension self-priming pump having a large-capacity gas-liquid separation chamber 103, such as Figures 1 to 3 As shown, the magnetic suspension self-priming pump includes a pump body 10 with a pump cavity 102, a rotor 30, a motor 40 and a pump cover 20; the rotor 30 is suspended and non-contactedly arranged in the pump cavity 102; the pump cover 20 is arranged on one side of the pump body 10, for sealing the pump cavity 102 and providing a flow channel for liquid to flow in; the motor 40 is arranged on the other side of the pump body 10, for driving the rotor 30 to rotate; the pump body 10 includes a gas-liquid separation part 101 and a water outlet node 104, and a gas-liquid separation chamber 103 is formed in the gas-liquid separation part 101 and the water outlet node 104, for separating the gas and liquid from the mixture of gas and liquid. Preferably, in order to increase the capacity of the gas-liquid separation chamber 103 and improve the gas-liquid separation effect, the cross-sectional shape of the gas-liquid separation chamber 103 in the horizontal direction is rectangular. In order to obtain a gas-liquid separation chamber 103 with a large cross-sectional area, the cross-sectional shape of the gas-liquid separation part 101 is rectangular, which is adapted to the cross-sectional shape of the gas-liquid separation chamber 103.

[0035] pass Figures 2 to 6It can be seen that due to the limitations of the overall size, flow rate, head, etc. of the pump, the thickness dimension W of the pump body 10 in the rotational axis direction of the rotor 30 is much smaller than the dimension of the pump body 10 in the radial direction. Therefore, the size of the gas-liquid separation chamber 103 will be limited by the thickness dimension W of the pump body 10 in the rotational axis direction of the rotor 30. If a gas-liquid separation chamber 103 with a circular cross-section is set, the diameter dimension of this gas-liquid separation chamber 103 needs to be smaller than the thickness dimension W. With a fixed height, the volume of the gas-liquid separation chamber 103 with a circular cross-section where d is the diameter of the gas-liquid separation chamber 103 with a circular cross-section, d < W; and the volume V2 of the gas-liquid separation chamber 103 with a rectangular cross-section is V2 = L1L2h, where L1 is the length of the rectangular cross-section of the gas-liquid separation chamber 103, L2 is the width, L1 > W, L2 = d; from this, it can be obtained that the volume of the gas-liquid separation chamber 103 with a rectangular cross-section is much larger than the volume of the gas-liquid separation chamber 103 with a circular cross-section. And a large-capacity gas-liquid separation chamber 103 can accelerate the separation of gas and liquid and improve the gas-liquid separation effect.

[0036] In order to improve the gas-liquid separation effect, the gas-liquid separation part 101 is arranged at the highest point of the pump chamber 102, such as Figure 6 and 7 as shown. A first gas-liquid separation chamber 1011 is arranged in the gas-liquid separation part 101, and a second gas-liquid separation chamber 1041 is arranged in the water outlet section 104. The first gas-liquid separation chamber 1011 and the second gas-liquid separation chamber 1041 together form the gas-liquid separation chamber 103. When starting for the first time or restarting after a long-term shutdown, it is necessary to fill the pump chamber 102 with water. In the initial stage of starting, the gas in the pump chamber 102 and the pipeline needs to be discharged, so gas-liquid separation is required. Since the density of gas is less than that of liquid, the gas in the pump chamber 102 will be located above the liquid. Compared with the design where the gas-liquid separation part 101 is arranged on both sides of the highest point of the pump chamber 102, arranging the gas-liquid separation part 101 at the highest point of the pump chamber 102 makes it difficult for gas to stay in the pump chamber 102, enabling the gas in the pump chamber 102 to be quickly discharged completely outside the pump, so that the pump maintains a stable head and flow rate.

[0037] The water outlet section 104 and the gas-liquid separation part 101 are fixed by at least one of welding, bonding, and fastener connection. The water outlet section 104 and the gas-liquid separation part 101 adopt a separable design. In this way, the exhaust and drainage channels inside the water outlet section 104 can be processed first, and after processing, the water outlet section 104 is installed on the pump body 10, so as to simplify the processing steps and difficulty of the channels, improve the processing convenience and efficiency, and reduce the processing cost.

[0038] The water outlet section 104 is also provided with a first water outlet chamber 1042, a second water outlet chamber 1043 and a third water outlet chamber 1044 which are interconnected. The first water outlet chamber 1042 is interconnected with the second gas-liquid separation chamber 1041 to form an outlet for liquid and gas to flow out. Preferably, the diameter of the first water outlet chamber 1042 is smaller than the diameter of the third water outlet chamber 1044. In this case, the first water outlet chamber 1042 can achieve the function of controlling the flow rate. According to the flow rate requirements, the water outlet section 104 can be modularly designed. For example, the size of the first section of the water outlet joint 104 can be kept unchanged, that is, the size of the installation interface between the water outlet joint 104 and the pump body 10 remains unchanged, and only the size of the second section and the third section is changed, and the first water outlet chamber 1042, the second water outlet chamber 1043 and the third water outlet chamber 1044 of different specifications are designed. By controlling the size of the first water outlet chamber 1042, the second water outlet chamber 1043 and the third water outlet chamber 1044, the purpose of controlling the flow rate is achieved, and according to the requirements of different flow rates, only the water outlet joints 104 of different specifications need to be replaced to meet the requirements of different flow rates. The water outlet joint 104 adopts a modular design. By replacing the water outlet joints 104 of different specifications, the flow rate of the pump can be controlled, and the function of changing the flow rate of the pump by only replacing the water outlet joint 104 is achieved, thereby improving the diversity of the pump.

[0039] In order to improve the gas-liquid separation effect, in one embodiment, Figures 6 to 8 As shown, a baffle assembly 106 is provided in the gas-liquid separation chamber 103. At the initial stage of starting the magnetic levitation self-priming pump, the gas and liquid in the pump body 10 will flow toward the outlet together. At this time, the baffle assembly 106 can effectively block the upward movement of the liquid and let the liquid fall back, allowing the gas to flow to the outlet first, so as to accelerate the separation between the gas and the liquid, increase the effect of gas-liquid separation, and maintain a stable flow output and a stable head.

[0040] There are many ways to set the baffle assembly 106. The following is an example of the setting direction of the baffle assembly 106.

[0041] In one embodiment, if Figure 8 As shown, the baffle assembly 106 includes two baffle plates symmetrically arranged along the rotation axis of the rotor 30 .

[0042] In one embodiment, the baffle assembly 106 includes a plurality of baffles arranged in a staggered manner along the height direction of the gas-liquid separation chamber 103 , and the plurality of baffles are fixedly disposed on the inner wall of the gas-liquid separation chamber.

[0043] In one embodiment, the baffle assembly 106 includes a plurality of baffles, which are arranged in a staggered manner along the height direction of the gas-liquid separation chamber 103, one end of the baffle is hinged to the inner wall of the gas-liquid separation chamber 103, and the other end is connected to the inner wall of the gas-liquid separation chamber 103 through an elastic element. The elastic element can be a spring. When the pump is not working, the elastic element is in a stretched state. At this time, under the connection of the elastic element, the angle between the baffle and the inner wall of the gas-liquid separation chamber 103 is large. When the pump starts to work, the baffle can effectively block the liquid and improve the effect of gas-liquid separation. After all the gas in the pump chamber 102 is discharged, due to the increase in the pressure in the pump chamber 102, under the action of the discharged liquid, the baffle moves in the direction close to the inner wall of the gas-liquid separation chamber 103, squeezing the elastic element. At this time, the angle between the baffle and the inner wall of the gas-liquid separation chamber 103 is reduced, so that the liquid can be discharged smoothly. When the pump finishes working, the pressure in the pump chamber 102 disappears, and the elastic element returns to the state when the pump is not working, driving the baffle plate to move away from the inner wall of the gas-liquid separation chamber 103 to prepare for gas-liquid separation at the next start-up.

[0044] In one embodiment, the baffle assembly 106 includes a baffle plate that rises in a spiral along the inner wall of the gas-liquid separation chamber 103. In the initial stage of starting the magnetic levitation self-priming pump, the baffle plate that rises in a spiral can effectively achieve gas-liquid separation and improve the effect of gas-liquid separation.

[0045] In one embodiment, the barrier assembly includes an airbag, the inflation and depression of which are controlled by an external gas source. During the self-priming stage of the pump, gas is blown into the airbag to cause the airbag to swell, thereby forming a barrier and promoting gas-liquid separation. After the pump self-priming is completed, the gas in the airbag is sucked away to cause the airbag to collapse. At this time, the barrier assembly is in contact with the wall of the gas-liquid separation portion, minimizing the barrier assembly's obstruction to the outflow of liquid.

[0046] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0047] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the intention of the present application also includes these modifications and variations.

Claims

1. A magnetically suspended self-priming pump with a large-capacity gas-liquid separation chamber, characterized in that: The invention comprises a pump body having a pump cavity, a rotor, a motor and a pump cover, wherein the rotor is suspended and non-contactly arranged in the pump cavity, the pump cover is arranged on one side of the pump body, and the motor is arranged on the other side of the pump body. The pump body comprises a gas-liquid separation part and a water outlet node, a gas-liquid separation chamber is formed in the gas-liquid separation part and the water outlet node, and the gas-liquid separation chamber has a rectangular cross-sectional shape in the horizontal direction.

2. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 1 is characterized in that: A baffle assembly is arranged in the gas-liquid separation chamber.

3. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 1 is characterized in that: The gas-liquid separation portion is arranged at the highest point of the pump chamber.

4. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 1 is characterized in that: The gas-liquid separation portion has a rectangular cross-sectional shape.

5. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 1 is characterized in that: The water outlet node and the gas-liquid separation part are fixed by at least one of welding, bonding, and fastener connection.

6. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 2 is characterized in that: The baffle assembly comprises two baffle plates symmetrically arranged along the rotation axis of the rotor.

7. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 2 is characterized in that: The baffle assembly comprises a plurality of baffle plates arranged in a staggered manner along the height direction of the gas-liquid separation chamber, and the plurality of baffle plates are fixedly arranged on the inner wall of the gas-liquid separation chamber.

8. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 2 is characterized in that: The baffle assembly includes a plurality of baffle plates, which are arranged in a staggered manner along the height direction of the gas-liquid separation chamber, one end of the baffle plate is hinged to the inner wall of the gas-liquid separation chamber, and the other end is connected to the inner wall of the gas-liquid separation chamber through an elastic element.

9. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 2, characterized in that: The baffle assembly comprises a baffle plate which rises in a spiral along the inner wall of the gas-liquid separation chamber.

10. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 2, characterized in that: The baffle assembly comprises an air bag, and the expansion and depression of the air bag are controlled by an external air source.

11. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 1, characterized in that: The gas-liquid separation part is provided with a first gas-liquid separation cavity, the water outlet node is provided with a second gas-liquid separation cavity, and the first gas-liquid separation cavity and the second gas-liquid separation cavity together form a gas-liquid separation chamber.

12. The magnetic suspension self-priming pump with a large-capacity gas-liquid separation chamber according to claim 1, characterized in that: The water outlet section is also provided with a first water outlet chamber, a second water outlet chamber and a third water outlet chamber which are interconnected. The first water outlet chamber is interconnected with the second gas-liquid separation chamber.

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