Flow-variable circulating pump set

Abstract

The utility model provides a variable flow circulating pump set which comprises a liquid outlet main pipe and a liquid inlet main pipe which are arranged in parallel up and down. The circulating pipeline is arranged between the liquid outlet main pipe and the liquid inlet main pipe, and circulating liquid in the liquid inlet main pipe is conveyed into the liquid outlet main pipe through the circulating pipeline; the liquid outlet main pipe and the liquid inlet main pipe are further connected with a plurality of groups of bypass pipelines in parallel, and each bypass pipeline comprises a first circulating pump, a second circulating pump, a liquid inlet pipeline and a liquid outlet pipeline; the first circulating pump and the second circulating pump are connected with the liquid inlet main pipe through a liquid inlet pipeline, and the first circulating pump and the second circulating pump are connected with the liquid outlet main pipe through a liquid outlet pipeline. The circulation pipeline and the bypass pipeline are used in a matched mode, control equipment and complex pipeline structures are reduced, operation of operators is facilitated, and the requirement for flow conversion control is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating pump sets, and in particular relates to a variable flow circulating pump set. Background Art

[0002] Circulation pumps are commonly used in heating and cooling circulation systems. In actual use, the required circulation water volume changes according to the changes in heating and cooling loads. This requires the pump to have a certain ability to adjust the flow rate and be able to change according to demand.

[0003] In the prior art, the control of the circulation pump group is simple, and most of them use a single module in parallel to achieve flow control needs, resulting in a variety of circulation pump group control structures and a complex pipeline control process that is not conducive to operator switching and subsequent equipment maintenance. Utility Model Content

[0004] The utility model provides a variable flow circulation pump group, aiming to solve the problem that the current circulation pump group has various control structures and complicated pipeline control, which is not conducive to operators to switch and maintain the equipment in the later stage.

[0005] The utility model is implemented in this way: a variable flow circulation pump group comprises:

[0006] A liquid outlet main pipe and a liquid inlet main pipe, wherein the liquid outlet main pipe and the liquid inlet main pipe are arranged in parallel up and down;

[0007] A circulation pipeline is provided between the liquid outlet main pipe and the liquid inlet main pipe, and the circulating liquid in the liquid inlet main pipe is transported to the inside of the liquid outlet main pipe through the circulation pipeline;

[0008] A side branch pipeline, wherein the liquid outlet main pipe and the liquid inlet main pipe are connected in parallel with a plurality of side branch pipelines, wherein the side branch pipeline comprises a side branch circulation pump group, a liquid inlet pipeline and a liquid outlet pipeline; the side branch circulation pump group comprises a first circulation pump and a second circulation pump, wherein the first circulation pump and the second circulation pump are connected to the liquid inlet main pipe through the liquid inlet pipeline, and the first circulation pump and the second circulation pump are connected to the liquid outlet main pipe through the liquid outlet pipeline.

[0009] Preferably, the liquid outlet pipeline includes a first liquid outlet pipe and a second liquid outlet pipe; the first liquid outlet pipe is connected between the liquid outlet main pipe and the water outlet of the first circulation pump, one end of the second liquid outlet pipe is connected to the water outlet of the second circulation pump, and the other end is connected to the middle section of the first liquid outlet pipe.

[0010] Preferably, the liquid inlet pipeline includes a first liquid inlet pipe and a second liquid inlet pipe, the first liquid inlet pipe is connected between the liquid inlet main pipe and the water inlet of the first circulation pump, one end of the second liquid outlet pipe is connected to the water inlet of the second circulation pump, and the other end is connected to the middle section of the first liquid inlet pipe.

[0011] Preferably, the circulation pipeline comprises a circulation pump, a liquid outlet pipe and a liquid inlet pipe, and the circulation pump is connected to the liquid outlet main pipe and the liquid inlet main pipe through the liquid outlet pipe and the liquid inlet pipe respectively.

[0012] Preferably, a liquid outlet control valve is provided on the first liquid outlet pipe; and a liquid inlet control valve is provided on the first liquid inlet pipe.

[0013] Preferably, the liquid outlet control valve is arranged at the rear end of the connection point between the first liquid outlet pipe and the second liquid outlet pipe, and the output water flow of the first circulation pump and the second circulation pump converge at the confluence point and then reaches the liquid inlet control valve and enters the liquid outlet main pipe through the liquid inlet control valve;

[0014] The liquid inlet control valve is arranged at the front end of the connection point between the first liquid inlet pipe and the second liquid inlet pipe. The water flow in the liquid inlet main pipe will first pass through the liquid inlet control valve and then be diverted from the connection point to the first circulation pump and the second circulation pump.

[0015] Preferably, the power of the first circulation pump and the second circulation pump are different, the liquid inlet control valve and the liquid outlet control valve are both three-way control valves, the liquid outlet control valve is arranged at the connection point of the first liquid outlet pipe and the second liquid outlet pipe, and the liquid inlet control valve is arranged at the connection point of the first liquid inlet pipe and the second liquid inlet pipe.

[0016] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0017] 1. The variable flow circulation pump group provided by the utility model is a double pump group structure through the side branch pipeline, and multiple groups of side branch pipelines are connected in parallel to the liquid outlet main pipe and the liquid inlet main pipe. In actual use, the circulation pipeline and the side branch pipeline are selected and used in combination as needed, which reduces the control equipment and complex pipeline structure, is convenient for operators to operate, and realizes the flow conversion control needs.

[0018] 2. The variable flow circulation pump group provided by the utility model realizes the different powers of the first circulation pump and the second circulation pump in the bypass pipeline, and cooperates with the three-way control valve to realize the single pump and double pump operation of the bypass pipeline combined with the circulation pipeline, thereby realizing more flow delivery needs and meeting more different flow conversion needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a variable flow circulation pump group.

[0020] Figure 2 The utility model provides a schematic diagram of the structure of a bypass pipeline and a circulation pipeline of a variable flow circulation pump group.

[0021] Figure 3 The utility model provides a flow control structure diagram of a variable flow circulation pump group.

[0022] Figure 4 The utility model discloses a structural schematic diagram of a liquid inlet pipeline and a liquid outlet pipeline of a variable flow circulation pump group.

[0023] Figure 5 The utility model provides a schematic diagram of the bypass pipeline structure of a variable flow circulation pump group.

[0024] Figure 6 The utility model discloses a schematic diagram of a bypass pipeline connection structure when a first circulating pump and a second circulating pump of a variable flow circulating pump group have different powers.

[0025] Description of reference numerals:

[0026] 110, liquid outlet pipe; 120, liquid inlet pipe;

[0027] 200, bypass pipeline; 210, bypass circulation pump group; 211, first circulation pump; 212, second circulation pump; 220, liquid outlet pipeline; 221, first liquid outlet pipe; 222, second liquid outlet pipe; 223, liquid outlet control valve; 230, liquid inlet pipeline; 231, first liquid inlet pipe; 232, second liquid inlet pipe; 233, liquid inlet control valve;

[0028] 300, circulation pipeline; 310, circulation pump; 320, liquid outlet pipe; 330, liquid inlet pipe. DETAILED DESCRIPTION

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The utility model embodiment provides a variable flow circulation pump group, such as Figure 1-Figure 6 As shown, the variable flow circulation pump group comprises:

[0032] A liquid outlet main pipe 110 and a liquid inlet main pipe 120, wherein the liquid outlet main pipe 110 and the liquid inlet main pipe 120 are arranged in parallel up and down;

[0033] A circulation pipeline 300 is provided between the liquid outlet main pipe 110 and the liquid inlet main pipe 120, and the circulating liquid in the liquid inlet main pipe 120 is transported to the inside of the liquid outlet main pipe 110 through the circulation pipeline 300;

[0034] A bypass pipeline 200, wherein the liquid outlet main pipe 110 and the liquid inlet main pipe 120 are further connected in parallel with a plurality of groups of bypass pipelines 200, wherein the bypass pipeline 200 comprises a bypass circulation pump group 210, a liquid inlet pipeline 230 and a liquid outlet pipeline 220;

[0035] The bypass circulation pump group 210 includes a first circulation pump 211 and a second circulation pump 212, the first circulation pump 211 and the second circulation pump 212 are connected to the liquid inlet main pipe 120 through the liquid inlet pipe 230, and the first circulation pump 211 and the second circulation pump 212 are connected to the liquid outlet main pipe 110 through the liquid outlet pipe 220; the bypass pipeline 200 is a double pump group structure, and multiple groups of bypass pipelines 200 are connected in parallel to the liquid outlet main pipe 110 and the liquid inlet main pipe 120. In actual use, the circulation pipeline 300 and the bypass pipeline 200 are selected and used in combination as needed to achieve the flow conversion control needs;

[0036] In the present application, the liquid outlet main pipe 110 and the liquid inlet main pipe 120 are pipeline structures in the prior art. The liquid outlet main pipe 110 and the liquid inlet main pipe 120 are suspended and arranged in parallel through a pipe gallery. The liquid outlet main pipe 110 and the liquid inlet main pipe 120 are connected to each other only through a bypass pipe 200 or a circulation pipe 300. The liquid outlet of the liquid outlet main pipe 110 and the liquid inlet of the liquid inlet main pipe 120 are connected to the condensation pipe of the cooling device; and the end of the liquid outlet main pipe 110 away from the liquid outlet and the end of the liquid inlet main pipe 120 away from the liquid inlet are in a closed state and do not participate in the flow of the circulating liquid;

[0037] The circulation pipeline 300 includes a circulation pump 310, a liquid outlet pipe 320 and a liquid inlet pipe 330. The circulation pump 310 is connected to the liquid outlet main pipe 110 and the liquid inlet main pipe 120 through the liquid outlet pipe 320 and the liquid inlet pipe 330 respectively.

[0038] In this embodiment, the first circulation pump 211, the second circulation pump 212 and the circulation pump 310 are all mature existing technology equipment. When the circulation pipeline 300 is activated alone, the circulation pump group will generate power to drive the circulation liquid to flow by the circulation pump 310, and the bypass pipeline 200 is a double pump structure. Therefore, when the bypass pipeline 200 is activated alone, the circulation pump group will generate power to drive the circulation liquid to flow by the first circulation pump 211 and the second circulation pump 212. When the circulation pipeline 300 and the bypass pipeline 200 are started at the same time, the first circulation pump 211, the second circulation pump 212 and the circulation pump 310 drive the circulation liquid to flow at the same time; more flow configuration needs are generated by the combination between the circulation pipeline 300 and several groups of bypass pipelines 200;

[0039] When there are two or more groups of bypass pipelines, the bypass pipeline and the circulation pipeline can also be combined to achieve a mixed combination, thereby improving the use efficiency of the equipment and reducing the investment in control equipment;

[0040] As a preferred implementation in this embodiment, the liquid outlet pipeline 220 includes a first liquid outlet pipe 221 and a second liquid outlet pipe 222; the first liquid outlet pipe 221 is connected between the liquid outlet main pipe 110 and the water outlet of the first circulation pump 211, one end of the second liquid outlet pipe 222 is connected to the water outlet of the second circulation pump 212, and the other end is connected to the middle section of the first liquid outlet pipe 221; the fluid output by the second circulation pump 212 will be collected into the first liquid outlet pipe 221 through the second liquid outlet pipe 222, and then sent to the liquid outlet main pipe 110 through the first liquid outlet pipe 221;

[0041] The liquid inlet pipeline 230 includes a first liquid inlet pipe 231 and a second liquid inlet pipe 232. The first liquid inlet pipe 231 is connected between the liquid inlet main pipe 120 and the water inlet of the first circulating pump 211. One end of the second liquid outlet pipe 222 is connected to the water inlet of the second circulating pump 212, and the other end is connected to the middle section of the first liquid inlet pipe 231. The liquid introduced by the first liquid inlet pipe 231 will be dispersed to the first circulating pump 211 and the second circulating pump 212 at the connection point of the first liquid inlet pipe 231 and the second liquid inlet pipe 232.

[0042] As a preferred implementation in this embodiment, a liquid outlet control valve 223 is provided on the first liquid outlet pipe 221; a liquid inlet control valve 233 is provided on the first liquid inlet pipe 231.

[0043] The liquid outlet control valve 223 is arranged at the rear end of the connection point between the first liquid outlet pipe 221 and the second liquid outlet pipe 222. The output water flow of the first circulation pump 211 and the second circulation pump 212 converges at the confluence point and reaches the liquid inlet control valve 233. The water flows enter the liquid outlet main pipe 110 through the liquid inlet control valve 233.

[0044] The liquid inlet control valve 233 is disposed at the front end of the connection point between the first liquid inlet pipe 231 and the second liquid inlet pipe 232. The water flow in the liquid inlet main pipe 120 will first pass through the liquid inlet control valve 233 and then be diverted from the connection point to the first circulation pump 211 and the second circulation pump 212.

[0045] The liquid outlet control valve 223 and the liquid inlet control valve 233 are used together to complete the activation of the bypass pipeline 200. When in use, the corresponding liquid outlet control valve 223 and the liquid inlet control valve 233 can be controlled according to the adjustment needs to allow the bypass pipeline 200 to participate in fluid transportation;

[0046] As a preferred implementation in this embodiment, the liquid outlet control valve 223 can also be a three-way control valve, and is arranged at the connection point of the first liquid outlet pipe 221 and the second liquid outlet pipe 222. The liquid inlet control valve 233 is the same three-way control valve and is arranged at the connection point of the first liquid inlet pipe 231 and the second liquid inlet pipe 232. Here, the power of the first circulation pump 211 and the second circulation pump 212 is different; the liquid outlet control valve 223 and the liquid inlet control valve 233 use three-way control valves to achieve the effect of separately starting the first circulation pump 211 and the second circulation pump 212. Since the power of the first circulation pump 211 and the second circulation pump 212 is different, one of them can be separately started as needed for fluid transportation, and more flow transportation needs can be achieved in cooperation with the circulation pipeline 300 or other bypass pipelines 200;

[0047] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0048] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A variable flow circulation pump set, characterized in that: include: A liquid outlet main pipe and a liquid inlet main pipe, wherein the liquid outlet main pipe and the liquid inlet main pipe are arranged in parallel up and down; A circulation pipeline is provided between the liquid outlet main pipe and the liquid inlet main pipe, and the circulating liquid in the liquid inlet main pipe is transported to the inside of the liquid outlet main pipe through the circulation pipeline; A side branch pipeline, wherein the liquid outlet main pipe and the liquid inlet main pipe are connected in parallel with a plurality of side branch pipelines, wherein the side branch pipeline comprises a side branch circulation pump group, a liquid inlet pipeline and a liquid outlet pipeline; the side branch circulation pump group comprises a first circulation pump and a second circulation pump, wherein the first circulation pump and the second circulation pump are connected to the liquid inlet main pipe through the liquid inlet pipeline, and the first circulation pump and the second circulation pump are connected to the liquid outlet main pipe through the liquid outlet pipeline.

2. A variable flow circulation pump set as claimed in claim 1, characterized in that: The liquid outlet pipeline includes a first liquid outlet pipe and a second liquid outlet pipe; the first liquid outlet pipe is connected between the liquid outlet main pipe and the water outlet of the first circulation pump, one end of the second liquid outlet pipe is connected to the water outlet of the second circulation pump, and the other end is connected to the middle section of the first liquid outlet pipe.

3. A variable flow circulation pump set as claimed in claim 2, characterized in that: The liquid inlet pipeline includes a first liquid inlet pipe and a second liquid inlet pipe, the first liquid inlet pipe is connected between the liquid inlet main pipe and the water inlet of the first circulation pump, one end of the second liquid outlet pipe is connected to the water inlet of the second circulation pump, and the other end is connected to the middle section of the first liquid inlet pipe.

4. A variable flow circulation pump set as claimed in claim 3, characterized in that: The circulation pipeline comprises a circulation pump, a liquid outlet pipe and a liquid inlet pipe. The circulation pump is connected with the liquid outlet main pipe and the liquid inlet main pipe through the liquid outlet pipe and the liquid inlet pipe respectively.

5. A variable flow circulation pump set as claimed in claim 4, characterized in that: The first liquid outlet pipe is provided with a liquid outlet control valve; the first liquid inlet pipe is provided with a liquid inlet control valve.

6. A variable flow circulation pump set as claimed in claim 5, characterized in that: The liquid outlet control valve is arranged at the rear end of the connection point between the first liquid outlet pipe and the second liquid outlet pipe. The output water flow of the first circulation pump and the second circulation pump converges at the confluence point and reaches the liquid inlet control valve through the liquid inlet control valve to enter the liquid outlet main pipe. The liquid inlet control valve is arranged at the front end of the connection point between the first liquid inlet pipe and the second liquid inlet pipe. The water flow in the liquid inlet main pipe will first pass through the liquid inlet control valve and then be diverted from the connection point to the first circulation pump and the second circulation pump.

7. A variable flow circulation pump set as claimed in claim 5, characterized in that: The power of the first circulation pump and the second circulation pump is different. The liquid inlet control valve and the liquid outlet control valve are both three-way control valves. The liquid outlet control valve is arranged at the connection point of the first liquid outlet pipe and the second liquid outlet pipe, and the liquid inlet control valve is arranged at the connection point of the first liquid inlet pipe and the second liquid inlet pipe.

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