R290 / alkane refrigerant circulating pump pool

Abstract

The utility model relates to an R290 / alkane refrigerant circulating pump pool, and belongs to the technical field of pump pool devices, the R290 / alkane refrigerant circulating pump pool comprises a tank body and an immersed pump arranged in the tank body, the tank body is provided with a liquid inlet, a liquid outlet and a gas phase port, a three-way pipe is fixed at the gas phase port, the innermost end of the three-way pipe is communicated with a gas phase space in the tank body, and the innermost end of the three-way pipe is communicated with the gas phase space in the tank body. A plug is arranged at the outermost end of the three-way pipe, a safety valve is arranged at the remaining end of the three-way pipe, and a power line of the immersed pump penetrates into the three-way pipe and then is connected with the plug. An original gas phase opening is expanded into the two connectors through the three-way pipe, one connector is used for leading out a power line of the immersed pump, the other connector is used for being connected with the safety valve, and therefore only three holes need to be formed in the tank body, the number of the holes is reduced, pipeline arrangement is optimized, the machining difficulty of a pump pool is reduced, and potential safety hazards are reduced; a ball structure is arranged at the tail end of the liquid return pipe, after liquid injection is completed, the ball keeps the liquid return opening closed under the action of self weight, and the thermosyphon is blocked.

Description

Technical Field

[0001] The present application relates to the field of pump pool devices, and in particular to an R290 / alkane refrigerant circulation pump pool. Background Art

[0002] With increasing environmental concerns and the greenhouse effect of HFCs, the Montreal Protocol amendment mandates the replacement of current high-GWP refrigerants with ozone-friendly refrigerants and their effective use in air conditioning systems. Due to its favorable environmental performance, the natural refrigerant R290 is often used in home air conditioning systems.

[0003] The Chinese patent with announcement number CN113266762B discloses an HPB pressurization system for LNG storage containers. The refrigerant circulation pump in this system is a pipeline pump, which is prone to air blockage during use. In order to solve the above-mentioned air blockage problem, the refrigerant circulation pump is optimized into a pump pool. The so-called pump pool is a device that installs a submersible pump in a container filled with cryogenic liquid. The function of the pump pool is mainly to introduce cryogenic liquid into the submersible pump and maintain a certain liquid level. The existing R290 pump pool includes a tank body and a submersible pump installed in the tank body. The tank body is provided with a liquid inlet, a liquid outlet and a lead-in port for leading out the power cord of the submersible pump. In order to ensure the safety of the pump pool, a valve pipe interface for installing a safety valve is also provided on the tank body.

[0004] Regarding the above technical solution, the inventor believes that four holes need to be opened on the tank body, which is a large number of holes. Each hole needs to be firmly welded to the corresponding pipeline, and air tightness needs to be ensured in multiple places, which invisibly increases the processing difficulty and also creates multiple safety hazards. Utility Model Content

[0005] In order to reduce the difficulty of pump pool processing and reduce safety hazards, the present application provides an R290 / alkane refrigerant circulation pump pool.

[0006] This application provides an R290 / alkane refrigerant circulation pump pool, which adopts the following technical solutions:

[0007] An R290 / alkane refrigerant circulation pump pool includes a tank body and a submersible pump arranged in the tank body. The tank body is provided with a liquid inlet, a liquid outlet and a gas phase port. A tee is fixed at the gas phase port. The innermost end of the tee is connected to the gas phase space in the tank body. The outermost end of the tee is provided with a plug, and the remaining end is provided with a safety valve. The power cord of the submersible pump is inserted into the tee and connected to the plug.

[0008] By adopting the above technical solution, compared with directly opening a valve pipe interface for connecting the safety valve and a lead-in port for leading out the power cord of the submersible pump on the tank body, this application expands the original gas phase port into two interfaces through a three-way pipe, one of which is used to lead out the power cord of the submersible pump, and the other interface is used to connect the safety valve, so that only three openings need to be opened on the tank body, which reduces the number of openings, optimizes the pipeline layout, reduces the processing difficulty of the pump pool and reduces safety hazards.

[0009] Optionally, a liquid inlet pipe is passed through and fixed at the liquid inlet, and the submersible pump is fixed on the liquid inlet pipe.

[0010] By adopting the above technical solution, the liquid inlet pipe is used for liquid intake on the one hand, and provides fixed load-bearing conditions for the submersible pump on the other hand. One pipe serves two purposes, which facilitates the optimization of the pipeline structure.

[0011] Optionally, the submersible pump is fixedly connected to the liquid inlet pipe through at least two clamps.

[0012] By adopting the above technical solution, the stability of the submersible pump installation is further enhanced, and the use of a clamp connection can facilitate the disassembly and assembly of the submersible pump, making the installation more flexible.

[0013] Optionally, a liquid return pipe is provided in the tank body, one end of the liquid return pipe is integrally formed with the liquid inlet pipe, and the other end is a liquid return port.

[0014] Optionally, the upper end of the liquid return port is connected to a liquid return cavity, the upper end of the liquid return cavity is closed, a liquid return hole is provided on the side wall of the liquid return cavity, and a ball for sealing the liquid return port is provided in the liquid return cavity.

[0015] With this technical solution, when the pump tank is filled, R290 cryogenic liquid is injected from the liquid inlet pipe into the liquid return pipe. When the R290 cryogenic liquid passes through the liquid return port, the ball is lifted, connecting the liquid return port with the liquid return cavity, allowing the R290 cryogenic liquid to be injected into the tank through the liquid return hole. After the liquid is filled, the ball is held at the lower limit position in the liquid return cavity by its own weight, thus keeping the liquid return port closed and blocking the thermosiphon.

[0016] Optionally, a liquid outlet pipe is fixedly provided at the liquid outlet, and the output end of the submersible pump is connected with an end of the liquid outlet pipe extending into the tank body through a flexible tube.

[0017] By adopting the above technical solution and providing a flexible tube, the difficulty of docking the liquid outlet pipe with the output end of the submersible pump is reduced, thereby reducing the difficulty of processing the pump pool.

[0018] Optionally, the tank body includes an intermediate shell, an upper head provided at one end of the intermediate shell, and a lower head provided at the other end of the intermediate shell, the liquid inlet, liquid outlet and gas phase port are all provided on the upper head, and the upper head and lower head are respectively welded and fixed to the intermediate shell.

[0019] By adopting the above technical solution, the tank body is formed by welding the intermediate shell, upper head and lower head, and the liquid inlet, liquid outlet and gas phase port are concentrated on the upper head, which is convenient for pump pool processing and pipeline layout on the pump pool.

[0020] Optionally, a fixing bracket is provided on the intermediate shell.

[0021] By adopting the above technical solution, the fixing bracket plays a role in fixing and supporting the tank body, which can facilitate the installation of the pump pool.

[0022] Optionally, the plug is an aviation plug.

[0023] By adopting the above technical solution, the aviation plug connection is more stable, and has the functions of moisture-proof, dust-proof, high temperature resistant and shock-resistant, with a longer service life, which makes it easier for the pump pool to adapt to harsh operating environments.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. This application expands the original gas phase port into two interfaces through a tee, one of which is used to lead out the power cord of the submersible pump, and the other is used to connect the safety valve. As a result, only three openings need to be opened on the tank body, reducing the number of openings, optimizing the pipeline layout, and thus reducing the processing difficulty of the pump pool and reducing safety hazards.

[0026] 2. Through the ball bearing arrangement, when the pump tank is filled, R290 cryogenic liquid is injected from the liquid inlet pipe into the liquid return pipe. When the R290 cryogenic liquid passes through the liquid return port, the ball bearing is lifted, thereby connecting the liquid return port with the liquid return cavity, allowing the R290 cryogenic liquid to be injected into the tank through the liquid return hole. After the liquid is filled, the ball bearing remains at the lower limit position in the liquid return cavity under the action of its own weight, thus keeping the liquid return port closed and blocking the thermosiphon. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of an R290 / alkane refrigerant circulation pump pool according to an embodiment of the present application, wherein the tank body has been partially cut away.

[0028] Figure 2 It is a schematic structural diagram of the tank body and the fixing bracket in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of the liquid return pipe in the embodiment of the present application, wherein the tank body adopts a vertical structure.

[0030] Figure 4 It is a cross-sectional view of the liquid return pipe in the embodiment of the present application, wherein the tank body adopts a horizontal structure.

[0031] Explanation of the accompanying symbols: 1. Tank body; 11. Intermediate shell; 111. Fixed bracket; 12. Upper head; 13. Lower head; 14. Return liquid pipe; 141. Return liquid port; 15. Return liquid cavity; 151. Return liquid hole; 16. Ball; 2. Submersible pump; 21. Flexible pipe; 3. Liquid inlet; 31. Liquid inlet pipe; 32. Liquid inlet valve; 4. Liquid outlet; 41. Liquid outlet pipe; 42. Liquid outlet valve; 5. Gas phase port; 51. Tee; 6. Plug; 7. Safety valve; 8. Clamp. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 , further details of this application are given.

[0033] Example:

[0034] The present application embodiment discloses an R290 / alkane refrigerant circulation pump pool. Figure 1 An R290 / alkane refrigerant circulation pump pool includes a tank body 1 and a submersible pump 2 installed within the tank body 1. The tank body 1 is provided with a liquid inlet 3, a liquid outlet 4, and a gas phase port 5. A tee 51 is fixed to the gas phase port 5. The innermost end of the tee 51 communicates with the gas phase space within the tank body 1. The outermost end of the tee 51 is fixedly connected to a plug 6. The remaining end of the tee 51 is connected to a safety valve 7. The power cord of the submersible pump 2 is inserted into the tee 51 and connected to the plug 6. To facilitate the pump pool's adaptation to harsh operating environments, the plug 6 is an aviation plug.

[0035] Compared with directly opening a valve pipe interface for connecting the safety valve 7 on the tank body 1, the present application expands the original gas phase port 5 into two interfaces through a tee, one of which is used to lead out the power cord of the submersible pump 2, and the other interface is used to connect the safety valve 7, so that only three openings need to be opened on the tank body 1, reducing the number of openings, optimizing the pipeline layout, and thereby reducing the processing difficulty of the pump pool and reducing safety hazards.

[0036] Reference Figure 1 A liquid inlet pipe 31 is fixedly provided at the liquid inlet port 3, and the submersible pump 2 is fixed on the liquid inlet pipe 31. A liquid inlet valve 32 is installed on a section of the liquid inlet pipe 31 located outside the tank body 1. In this way, the liquid inlet pipe 31 is used for liquid inlet on the one hand, and provides a fixed load-bearing condition for the submersible pump 2 on the other hand, a two-pronged pipe is used to optimize the pipeline structure.

[0037] Reference Figure 1The submersible pump 2 is fixedly connected to the liquid inlet pipe 31 via at least two clamps 8. In this embodiment, the number of clamps 8 is two, and the clamps 8 are gourd-shaped. Thus, the submersible pump 2 and the liquid inlet pipe 31 are fixed using a double clamp 8, further enhancing the stability of the submersible pump 2 installation, facilitating the assembly and disassembly of the submersible pump 2, and providing more flexible installation.

[0038] Reference Figure 1 A liquid outlet pipe 41 is fixedly provided at the liquid outlet 4, and a liquid outlet valve 42 is installed on a section of the liquid outlet pipe 41 located outside the tank body 1. The output end of the submersible pump 2 is connected to the end of the liquid outlet pipe 41 extending into the tank body 1 via a flexible tube 21. In this embodiment, the flexible tube 21 can be a corrugated tube or a rubber tube. The provision of the flexible tube 21 simplifies the connection between the liquid outlet pipe 41 and the output end of the submersible pump 2, thereby reducing the difficulty of manufacturing the pump tank.

[0039] Reference Figure 1-2 The tank body 1 includes an intermediate shell 11, an upper end cap 12 located at one end of the intermediate shell 11, and a lower end cap 13 located at the other end of the intermediate shell 11. The liquid inlet 3, liquid outlet 4, and gas-phase port 5 are all located on the upper end cap 12. The upper end cap 12 and the lower end cap 13 are each welded to the intermediate shell 11. Thus, the tank body 1 is fixed using three-section welding, facilitating the installation of the submersible pump 2 within it. Furthermore, the liquid outlet 4 and gas-phase port 5 are centrally located on the upper end cap 12, facilitating pump pool fabrication and piping layout within the pump pool.

[0040] Reference Figure 2 To facilitate the installation of the pump pool, a fixing bracket 111 is fixed to the outside of the intermediate housing 11.

[0041] Reference Figure 3-4 A liquid return pipe 14 is fixed inside the tank body 1. One end of the liquid return pipe 14 is integrally formed with the liquid inlet pipe 31, and the other end is a liquid return port 141. The upper end of the liquid return port 141 is connected to the liquid return cavity 15. The upper end of the liquid return cavity 15 is closed, and a liquid return hole 151 is formed on the side wall of the liquid return cavity 15. A ball 16 is disposed in the liquid return cavity 15 for sealing the liquid return port 141. The inner cavity height of the liquid return cavity 15 is greater than the outer diameter of the ball 16. In this embodiment, when the pump tank adopts a vertical structure, the liquid return pipe 14 is configured as a U-shape; when the pump tank adopts a horizontal structure, the liquid return pipe 14 is configured as an L-shape.

[0042] When filling the pump tank, R290 cryogenic liquid is injected into the return pipe 14 from the liquid inlet 3. When the R290 cryogenic liquid passes through the return port 141, the ball 16 is lifted, thereby connecting the return port 141 with the return chamber 15, allowing the R290 cryogenic liquid to be injected into the tank body 1 through the return hole 151. After the filling is completed, the ball 16 remains at the lower limit position in the return chamber 15 under the action of its own weight, thereby sealing the return port 141 and preventing the occurrence of thermal siphoning.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

[0044] Any equivalent changes made to the alkane medium to which R290 belongs in accordance with this application should be covered within the scope of protection of this application.

Claims

1. An R290 / alkane refrigerant circulation pump pool, comprising a tank body (1) and a submersible pump (2) disposed in the tank body (1), wherein the tank body (1) is provided with a liquid inlet (3), a liquid outlet (4) and a gas phase port (5), and is characterized in that: A three-way pipe (51) is fixed at the gas phase port (5), the innermost end of the three-way pipe (51) is connected to the gas phase space in the tank body (1), the outermost end of the three-way pipe (51) is provided with a plug (6), and the remaining end is provided with a safety valve (7), and the power line of the submersible pump (2) is inserted into the three-way pipe (51) and connected to the plug (6).

2. The R290 / alkane refrigerant circulation pump pool according to claim 1, characterized in that: A liquid inlet pipe (31) is fixedly provided at the liquid inlet (3), and the submersible pump (2) is fixed on the liquid inlet pipe (31).

3. The R290 / alkane refrigerant circulation pump pool according to claim 2, characterized in that: The submersible pump (2) is fixedly connected to the liquid inlet pipe (31) via at least two clamps (8).

4. The R290 / alkane refrigerant circulation pump pool according to claim 1, characterized in that: A liquid return pipe (14) is provided in the tank body (1), one end of the liquid return pipe (14) is integrally formed with the liquid inlet pipe (31), and the other end is a liquid return port (141).

5. The R290 / alkane refrigerant circulation pump pool according to claim 4, characterized in that: The upper end of the liquid return port (141) is connected to a liquid return cavity (15), the upper end of the liquid return cavity (15) is closed, a liquid return hole (151) is provided on the side wall of the liquid return cavity (15), and a ball (16) for sealing the liquid return port (141) is provided in the liquid return cavity (15).

6. The R290 / alkane refrigerant circulation pump pool according to claim 1, characterized in that: A liquid outlet pipe (41) is fixedly provided at the liquid outlet (4), and the output end of the submersible pump (2) is connected to one end of the liquid outlet pipe (41) extending into the tank body (1) through a flexible pipe (21).

7. The R290 / alkane refrigerant circulation pump pool according to claim 1, characterized in that: The tank body (1) comprises an intermediate shell (11), an upper head (12) provided at one end of the intermediate shell (11), and a lower head (13) provided at the other end of the intermediate shell (11); the liquid inlet (3), the liquid outlet (4), and the gas phase port (5) are all provided on the upper head (12); and the upper head (12) and the lower head (13) are respectively welded and fixed to the intermediate shell (11).

8. The R290 / alkane refrigerant circulation pump pool according to claim 7, characterized in that: A fixing bracket (111) is provided on the intermediate housing (11).

9. The R290 / alkane refrigerant circulation pump pool according to claim 1, characterized in that: The plug (6) is an aviation plug.

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