Double-inlet large-flow multi-stage centrifugal pump

Abstract

The utility model discloses a double-inlet large-flow multi-stage centrifugal pump, and belongs to the technical field of centrifugal pumps. A double-inlet large-flow multi-stage centrifugal pump comprises a pump body, a sealing end is arranged at one end of the pump body, a switching end is arranged at the other end of the pump body, the sealing end and the switching end are connected with the pump body through flanges, a driving connecting rod is arranged in the switching end, and a horizontal support is arranged at the bottom of the pump body. In order to solve the problems that most of existing multistage centrifugal pumps are designed to be of an integrated structure, the number of impellers of pump bodies is limited and fixed at the beginning of production, and the impellers cannot be adjusted and changed according to the real-time use condition at the later stage, an impeller sealing sleeve, a sealing end at the two ends and a switching end are designed to be of a split type structure; and during use, the pump body can be disassembled by loosening the screw rod to increase or decrease the impeller sealing sleeves, so that the impeller sealing sleeves can be selectively adjusted according to different use conditions, and the applicability of the pump body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a multi-stage centrifugal pump with double inlets and large flow. Background Art

[0002] Centrifugal pumps are a type of vane pump and are categorized as single-stage or multi-stage. Multi-stage centrifugal pumps are more widely used to increase head and flow. Currently used multi-stage centrifugal pumps are all single-suction centrifugal pumps, with a single inlet. Furthermore, single-suction multi-stage centrifugal pumps with a single inlet limit the pump's flow rate, preventing them from achieving high flow rates.

[0003] Most existing multi-stage centrifugal pumps are of an integrated structural design. The number of impellers in the pump body is limited and fixed at the beginning of production, and cannot be adjusted or changed according to real-time usage in the later stage. Utility Model Content

[0004] The purpose of the utility model is to provide a dual-inlet, large-flow multi-stage centrifugal pump, in which the impeller sleeve and the sealing ends and the adapter ends at both ends are of a split structure design. An independent centrifugal impeller is provided inside each impeller sleeve. When in use, the pump body can be disassembled by loosening the screw to increase or decrease the impeller sleeve, so that it can be selected and adjusted according to different usage conditions, thereby improving the applicability of the pump body and solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a dual-inlet, large-flow multi-stage centrifugal pump, comprising a pump body, a sealing end being provided at one end of the pump body, and a connecting end being provided at the other end of the pump body, wherein the sealing end and the connecting end are both connected to the pump body through a flange, a driving connecting rod being provided inside the connecting end, a horizontal bracket being provided at the bottom of the pump body, water inlets being provided on both sides of one end of the pump body, and a water outlet being provided above the other end of the pump body.

[0006] Furthermore, the pump body includes a plurality of impeller seals, a screw is provided on the outside of the impeller seals, the impeller seals are fitted together, and a centrifugal cavity is provided inside the impeller seals.

[0007] Furthermore, a centrifugal impeller is provided inside the centrifugal chamber, and the centrifugal impeller is connected to the driving connecting rod through bolts.

[0008] Furthermore, the centrifugal chambers are interconnected and are rotatably connected to the driving connecting rod, the sealing end and the adapter end through bearings.

[0009] Furthermore, a water diversion cavity is provided on the inner side of the sealing end, and a buffer cavity is provided on the inner side of the adapter end, wherein the water diversion cavity is communicated with the water inlet, and the buffer cavity is communicated with the water outlet.

[0010] Furthermore, a sealing sleeve shaft is provided inside the sealing end and the adapter end.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model adopts a split-type structural design of the impeller sleeve and the sealing ends and the adapter ends at both ends. An independent centrifugal impeller is provided inside each impeller sleeve. When in use, the pump body can be disassembled by loosening the screw to increase or decrease the impeller sleeve, so that it can be selected and adjusted according to different usage conditions, thereby improving the applicability of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall front view of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the centrifugal impeller structure of the present utility model.

[0016] In the figure: 1. Pump body; 2. Driving connecting rod; 101. Sealing end; 102. Adapter end; 103. Horizontal bracket; 104. Water inlet; 105. Water outlet; 106. Impeller sleeve; 107. Centrifugal impeller; 108. Sealing sleeve shaft; 1041. Water distribution chamber; 1051. Buffer chamber; 1061. Centrifugal chamber. 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] In order to solve the problem that the existing multi-stage centrifugal pumps are mostly designed with an integrated structure, the number of impellers in the pump body is limited and fixed at the beginning of production, and it is impossible to adjust and change it according to the actual usage in the future; please refer to Figure 1-3 , the utility model provides the following solutions:

[0019] A dual-inlet, large-flow multi-stage centrifugal pump includes a pump body 1, one end of the pump body 1 is provided with a sealing end 101, and the other end of the pump body 1 is provided with a connecting end 102, wherein the sealing end 101 and the connecting end 102 are both connected to the pump body 1 through flanges, a driving connecting rod 2 is provided inside the connecting end 102, a horizontal bracket 103 is provided at the bottom of the pump body 1, water inlets 104 are provided on both sides of one end of the pump body 1, and a water outlet 105 is provided above the other end of the pump body 1, one end of the driving connecting rod 2 is connected to the motor, and the motor is used to drive the driving connecting rod 2 to rotate at high speed, thereby driving the internal centrifugal impeller 107 to rotate, and drawing water into the cavity.

[0020] The pump body 1 includes a plurality of impeller sleeves 106, a screw is provided on the outside of the impeller sleeve 106, the impeller sleeves 106 are fitted together, a centrifugal chamber 1061 is provided inside the impeller sleeve 106, a centrifugal impeller 107 is provided inside the centrifugal chamber 1061, the centrifugal impeller 107 is connected to the driving connecting rod 2 by bolts, the centrifugal chambers 1061 are interconnected, and the driving connecting rod 2 is rotatably connected to the sealing end 101 and the adapter end 102 by bearings. The impeller sleeve 106 and the sealing ends 101 and the adapter end 102 at both ends are of a split structure design, and an independent centrifugal impeller 107 is provided inside each impeller sleeve 106. When in use, the pump body can be disassembled by loosening the screw to increase or decrease the impeller sleeve 106, so that it can be selected and adjusted according to different usage conditions, thereby improving the applicability of the pump body 1;

[0021] A water diversion chamber 1041 is provided on the inner side of the sealing end 101, and a buffer chamber 1051 is provided on the inner side of the adapter end 102, wherein the water diversion chamber 1041 is communicated with the water inlet 104, and the buffer chamber 1051 is communicated with the water outlet 105. A sealing sleeve shaft 108 is provided inside the sealing end 101 and the adapter end 102. The water inlets 104 on both sides transport the water flow into the water diversion chamber 1041, enter the independent centrifugal chamber 1061 through the water diversion chamber 1041, and finally enter the buffer chamber 1051.

[0022] Working principle: the impeller sleeve 106 and the sealing ends 101 and the adapter end 102 at both ends are of split structure design. An independent centrifugal impeller 107 is provided inside each impeller sleeve 106. When in use, the pump body can be disassembled by loosening the screw to increase or decrease the impeller sleeve 106, so that it can be selected and adjusted according to different usage conditions. One end of the driving connecting rod 2 is connected to the motor, and the motor is used to drive the driving connecting rod 2 to rotate at high speed, thereby driving the internal centrifugal impeller 107 to rotate, and drawing water into the cavity. At this time, the water inlets 104 on both sides transport the water flow to the water diversion chamber 1041, and enter the independent centrifugal chamber 1061 through the water diversion chamber 1041, and finally enter the buffer chamber 1051.

[0023] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0024] 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 dual-inlet, high-flow multi-stage centrifugal pump, characterized in that: The invention comprises a pump body (1), wherein one end of the pump body (1) is provided with a sealing end (101), and the other end of the pump body (1) is provided with a transfer end (102), wherein the sealing end (101) and the transfer end (102) are both connected to the pump body (1) via flanges, a driving connecting rod (2) is provided inside the transfer end (102), a horizontal bracket (103) is provided at the bottom of the pump body (1), water inlets (104) are provided on both sides of one end of the pump body (1), and a water outlet (105) is provided above the other end of the pump body (1).

2. A dual-inlet, high-flow multi-stage centrifugal pump according to claim 1, characterized in that: The pump body (1) comprises a plurality of impeller sleeves (106), a screw is provided on the outside of the impeller sleeves (106), the impeller sleeves (106) are fitted together, and a centrifugal chamber (1061) is provided inside the impeller sleeves (106).

3. A dual-inlet, high-flow multi-stage centrifugal pump according to claim 2, characterized in that: A centrifugal impeller (107) is provided inside the centrifugal chamber (1061), and the centrifugal impeller (107) is connected to the driving connecting rod (2) via bolts.

4. A dual-inlet, high-flow multi-stage centrifugal pump according to claim 2, characterized in that: The centrifugal chambers (1061) are interconnected and are rotatably connected to the driving connecting rod (2), the sealing end (101) and the adapter end (102) via bearings.

5. The dual-inlet, high-flow multi-stage centrifugal pump according to claim 1, characterized in that: A water diversion chamber (1041) is provided on the inner side of the sealing end (101), and a buffer chamber (1051) is provided on the inner side of the adapter end (102), wherein the water diversion chamber (1041) is connected to the water inlet (104), and the buffer chamber (1051) is connected to the water outlet (105).

6. The dual-inlet, high-flow multi-stage centrifugal pump according to claim 1, characterized in that: A sealing sleeve shaft (108) is provided inside the sealing end (101) and the transfer end (102).

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