Variable-flow self-suction tangent pump

Abstract

The utility model discloses a variable flow self-suction tangent pump, which relates to the technical field of fluid machinery, and comprises a pump body, the upper end of the pump body is connected with a liquid outlet pipe, the left end of the pump body is provided with a pump inlet pipeline, an elbow pipe and an inlet pipeline, the right end of the pump body is provided with a pump cover, the right end of the pump cover is provided with a bearing part, and the bearing part is provided with a bearing. A main shaft is installed in the bearing component, a mechanical sealing piece is installed in the bearing component, an impeller is installed at one end of the main shaft, the other end of the main shaft penetrates through the bearing component to be connected with an external driving piece, and a flow adjusting device is installed on the liquid outlet pipe. Particularly, the flow can be adjusted in the reducing direction, so that a new pump body is prevented from being machined, the cost is saved, the flow is adjusted through the adjusting block, and the standardization of a pump body product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid machinery, in particular to a variable flow self-priming tangential pump. Background Art

[0002] The tangent pump is a single-stage, horizontal, radially split partial flow pump, which is a special centrifugal pump. It is mainly used in small flow and high head conditions. It has the advantages of simple structure and wide application. Under the same working conditions, its efficiency is better than that of ordinary centrifugal pumps. The existing tangent pump controls the throat area (the area of ​​the small circular hole is the throat area) by drilling a small circular hole in the liquid outlet pipe of the pump body, thereby controlling the flow to meet the working conditions. The diameter of the small hole corresponds to the flow value one by one. This also means that after the diameter of the small hole is determined, the flow is a fixed value and the flow cannot be adjusted. If the flow needs to be adjusted, the small hole diameter can only be adjusted after the pump is disassembled, and the flow can only be adjusted to the maximum, and the flow cannot be reduced. If you want to reduce the flow, you can only replace the pump body. Conventional tangent pumps cannot independently realize the self-priming function. When there is a need for self-priming, it is usually necessary to add other independent self-priming devices to achieve it. The overall structure is complex and the cost is high. Utility Model Content

[0003] In order to solve the above problems, that is, to solve the problems raised by the above background technology, the utility model proposes a variable flow self-priming tangential pump, comprising a pump body, the upper end of the pump body is connected to a liquid outlet pipe, the left end of the pump body is equipped with a pump inlet pipeline, the other end of the pump inlet pipeline is equipped with an elbow pipe, the other end of the elbow pipe is equipped with an inlet pipeline, the right end of the pump body is equipped with a pump cover, the right end of the pump cover is equipped with a bearing component, a main shaft is installed in the bearing component, a mechanical seal is installed in the bearing component and on the right wall of the pump cover, one end of the main shaft passes through the mechanical seal and is equipped with an impeller, a pump chamber is provided between the pump cover and the pump body, the impeller is located in the pump chamber, the other end of the main shaft passes through the bearing component to connect to an external drive component, and a flow regulating device is installed on the liquid outlet pipe.

[0004] Preferably, the flow regulating device comprises an adjusting block installed in a side wall of the liquid outlet pipe, and a fastening bolt nut and an adjusting bolt are respectively installed on the upper and lower ends of the adjusting block.

[0005] Preferably, a gas-water separation chamber and a liquid outlet hole are provided in the liquid outlet pipe, and a throat is provided between the gas-water separation chamber and the adjustment block.

[0006] Preferably, the cross-sectional area of ​​the throat is smaller than the cross-sectional area of ​​the liquid outlet hole and smaller than the cross-sectional area of ​​the gas-water separation chamber.

[0007] Preferably, the throat is not coaxial with the liquid outlet.

[0008] Preferably, an O-ring is installed between the adjustment block and the liquid outlet pipe.

[0009] The beneficial technical effects of the utility model are as follows: the patent realizes the adjustment of the flow rate of the tangential pump, can be applied to variable flow conditions, expands the scope of use of the product, and especially realizes that the flow rate can be adjusted in the direction of reduction, thereby avoiding the need to process a new pump body and saving costs. Because the flow rate is adjusted through the adjustment block, the standardization of pump body products is improved, and the factory does not need to pre-stock pump bodies according to user needs, thereby shortening delivery time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The internal structure schematic diagram of the utility model is shown.

[0011] Figure 2 The figure shows the internal structure of the liquid outlet pipe of the utility model.

[0012] Figure 3 Shows Figure 2 Schematic diagram of the AA section.

[0013] Figure numerals: 1. main shaft, 2. inlet pipeline, 3. elbow pipe, 4. pump inlet pipeline, 5. pump body, 6. pump cover, 7. mechanical seal, 8. bearing component, 9. impeller, 10. liquid outlet pipe, 11. throat, 12. O-ring, 13. fastening stud nut, 14. adjusting block, 15. adjusting bolt, 16. air-water separation chamber, 17. liquid outlet hole, 18. pump cavity. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0015] The utility model proposes a variable flow self-priming tangential pump, comprising a pump body 5, wherein the upper end of the pump body 5 is connected to a liquid outlet pipe 10, a pump inlet pipeline 4 is installed at the left end of the pump body 5, a bent elbow pipe 3 is installed at the other end of the pump inlet pipeline 4, and an inlet pipeline 2 is installed at the other end of the bent elbow pipe 3, a pump cover 6 is installed at the right end of the pump body 5, a bearing component 8 is installed at the right end of the pump cover 6, a main shaft 1 is installed in the bearing component 8, a mechanical seal 7 is installed in the bearing component 8 and on the right wall of the pump cover 6, an impeller 9 is installed at one end of the main shaft 1 penetrating the mechanical seal 7, a pump chamber 18 is provided between the pump cover 6 and the pump body 5, the impeller 9 is located in the pump chamber 18, and the main shaft 1 is provided with a pump cavity 18. The other end of the shaft 1 passes through the bearing component 8 to connect to the external driving member, and a flow regulating device is installed on the liquid outlet pipe 10; the flow regulating device includes an adjusting block 14 installed in a side wall of the liquid outlet pipe 10, and the upper and lower ends of the adjusting block 14 are respectively installed with a fastening bolt nut 13 and an adjusting bolt 15; an air-water separation chamber 16 and a liquid outlet hole 17 are opened in the liquid outlet pipe 10, and a throat 11 is arranged between the air-water separation chamber 16 and the adjusting block 14; the cross-sectional area of ​​the throat 11 is less than the cross-sectional area of ​​the liquid outlet hole 17 < the cross-sectional area of ​​the air-water separation chamber 16; the throat 11 and the liquid outlet hole 17 are not coaxial; an O-ring 12 is installed between the adjusting block 14 and the liquid outlet pipe 10.

[0016] Working principle: The outlet pipe 10 adjusts the position of the adjustment block 14 "left and right" by tightening the stud nut 13 and adjusting the bolt 15, thereby changing the area of ​​the throat 11 and adjusting the flow rate to meet the changing flow rate usage requirements. The adjustment block 14 and the outlet pipe 10 are sealed by an O-ring 12.

[0017] At the same time, an elbow pipe 3 is added to the pump inlet pipeline 4, and the elbow pipe 3 and the pump chamber 18 are filled with liquid (only the pump needs to be pre-filled from the outside when it is started for the first time, and no additional liquid needs to be filled for subsequent starts). When the pump is started, the impeller 9 rotates to drive the inlet elbow pipe 3 and the liquid in the pump chamber 18 to rotate. At this time, the gas in the inlet pipeline 4 will be mixed in the liquid, and the liquid mixed with the gas after being pressurized by the impeller 9 enters the gas-water separation chamber 16 through the liquid outlet 17. Due to the sudden expansion of the cross-sectional area and the reduction of pressure, the gas is separated from the liquid and discharged through the throat 11. Most of the liquid after gas-water separation returns to the pump chamber 18 due to its own gravity. A small part of the liquid still has a large flow rate, but due to the non-concentricity of the liquid outlet 17 and the throat 11, it is blocked by the adjustment block 14 and falls back to the gas-water separation chamber 16 and returns to the pump chamber 18 until the gas in the inlet pipeline 4 is completely discharged, thereby achieving smooth self-priming of the pump. During the design and manufacturing process of the pump, it is imperative that the cross-sectional area of ​​the throat 11 is less than the cross-sectional area of ​​the liquid outlet 17 and less than the cross-sectional area of ​​the air-water separation chamber 16.

[0018] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0022] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A variable flow self-priming tangential pump, comprising a pump body (5), characterized in that The upper end of the pump body (5) is connected to a liquid outlet pipe (10), the left end of the pump body (5) is installed with a pump inlet pipe (4), the other end of the pump inlet pipe (4) is installed with a bent elbow pipe (3), the other end of the bent elbow pipe (3) is installed with an inlet pipe (2), the right end of the pump body (5) is installed with a pump cover (6), the right end of the pump cover (6) is installed with a bearing component (8), a main shaft (1) is installed in the bearing component (8), a mechanical seal (7) is installed in the bearing component (8) and located on the right wall of the pump cover (6), one end of the main shaft (1) passes through the mechanical seal (7) and is installed with an impeller (9), a pump chamber (18) is provided between the pump cover (6) and the pump body (5), the impeller (9) is located in the pump chamber (18), the other end of the main shaft (1) passes through the bearing component (8) and is connected to an external driving component, and a flow regulating device is installed on the liquid outlet pipe (10).

2. A variable flow self-priming tangential pump according to claim 1, characterized in that: The flow regulating device comprises an adjusting block (14) installed in a side wall of the liquid outlet pipe (10), a fastening bolt nut (13) and an adjusting bolt (15) are respectively installed at the upper and lower ends of the adjusting block (14), a gas-water separation chamber (16) and a liquid outlet hole (17) are provided in the liquid outlet pipe (10), and a throat (11) is provided between the gas-water separation chamber (16) and the adjusting block (14).

3. A variable flow self-priming tangential pump according to claim 2, characterized in that: The cross-sectional area of ​​the throat (11) is smaller than the cross-sectional area of ​​the liquid outlet (17) and smaller than the cross-sectional area of ​​the gas-water separation chamber (16).

4. A variable flow self-priming tangential pump according to claim 2, characterized in that: The throat (11) and the liquid outlet (17) are not coaxial.

5. A variable flow self-priming tangential pump according to claim 2, characterized in that: An O-ring (12) is installed between the adjustment block (14) and the liquid outlet pipe (10).

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