CN211345946U

CN211345946U - System pressure self-driven pump liquid supply pipeline system

Info

Publication number: CN211345946U
Application number: CN201922141067.8U
Authority: CN
Inventors: 李田林; 孙松; 崔振林; 宫兆鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-08-25
Anticipated expiration: 2029-12-04

Abstract

The utility model relates to a system pressure self-driven pump supplies liquid pipe-line system among the refrigerating system technical field. The problem solved is that: the method has the advantages of electric energy consumption, sensitive cavitation, difficult liquid pumping, no establishment of inlet-outlet pressure difference and high-cost auxiliary devices. The technical scheme adopted comprises the following key points: the liquid pumping end of the pressure-driven booster pump is respectively connected with the liquid outlet pipeline and the liquid inlet pipeline through a one-way valve; two sides of a piston at the driving part of the pressure-driven booster pump are respectively connected with corresponding passages of a two-position five-way electromagnetic valve outside the pump, the inlet of the two-position five-way electromagnetic valve is communicated with a pressure regulating valve, two pressure relief ports are communicated with a pressure relief pipeline, and the pressure pipeline A and the pressure pipeline B are controlled by the on-off control of the pressure relief ports to alternately perform pressurization and pressure relief; the pressure relief fluid is communicated with two pipelines of the throttle valve A and/or the throttle valve B through a pressure relief pipeline; the pressurized fluid enters the two-position five-way electromagnetic valve through the pressure regulating valve; the pressure regulating valve is connected with the electromagnetic valve A and/or the electromagnetic valve B. The liquid supply pipeline system is suitable for the technical field of refrigeration systems.

Description

System pressure self-driven pump liquid supply pipeline system

The technical field is as follows: the utility model relates to a full liquid supplies liquid pipe-line system among the refrigerating system technical field, especially a system pressure self-driven pump supplies liquid pipe-line system.

Background art: at present, the liquid supply pipeline system of the refrigeration system adopting a full liquid supply forced circulation mode is basically designed by using a gear electric pump or a centrifugal shielding electric pump to convey a low-temperature and low-pressure refrigerant. This prior art has many use disadvantages in practical engineering applications: the motor provides transmission power and consumes additional electric energy; the normal transmission of liquid refrigerant can be ensured only by ensuring that a net positive suction pressure head (NPSH) meets the requirement of cavitation allowance, and the lower the evaporation temperature, the larger the required hydrostatic column pressure difference is, and the larger the height difference between the liquid level and the space at the inlet of the pump is; in actual use, factors such as evaporation pressure fluctuation of a refrigerating system, cold liquid leakage at the side of a pump inlet, vaporization of refrigerant mixed into refrigerating machine oil and the like cause difficulty in pumping liquid, and mechanical parts such as a motor, a bearing and the like are damaged due to the fact that pressure difference between an inlet and an outlet is not established and dry running is not caused; the regulation of the volume flow is achieved only by complicated lines and the addition of costly auxiliary devices.

The utility model has the following contents: the utility model aims at providing a system pressure is from driving pump feed pipe system to solve the background art existence: the electric energy consumed by the motor is required to convey the refrigerant; the device is sensitive to cavitation, and the lower the evaporation temperature, the larger the required hydrostatic column pressure difference is; the phenomena of difficult liquid pumping and no inlet-outlet pressure difference caused by factors such as evaporation pressure fluctuation of a refrigerating system, cold liquid leakage at the side of a pump inlet, vaporization of refrigerant mixed in refrigerating machine oil and the like and dry running are avoided; the regulation of the volume flow is achieved only by complicated lines and the addition of costly auxiliary devices.

The technical scheme for solving the technical problem is as follows: a system pressure self-driven pump supplies liquid pipe-line system which characterized in that: the liquid end of the pressure-driven booster pump is respectively connected with a liquid outlet pipeline and a liquid inlet pipeline through a one-way valve, the liquid outlet pipeline is externally connected with a refrigeration evaporator to supply liquid, and the liquid inlet pipeline is connected with the bottom of a liquid phase region of a low-pressure circulation liquid storage device of a refrigeration system; two sides of a piston at the driving part of the pressure-driven booster pump are respectively connected with corresponding passages of a two-position five-way electromagnetic valve outside the pump through a pressure pipeline A and a pressure pipeline B, an inlet of the two-position five-way electromagnetic valve is communicated with a pressure regulating valve, and two pressure relief ports of the two-position five-way electromagnetic valve are communicated with a pressure relief pipeline; the on-off control of the two-position five-way electromagnetic valve controls the pressure pipeline A and the pressure pipeline B to alternately pressurize and release pressure, so that a driving piston in the pressure-driven booster pump drives a pump liquid piston to continuously reciprocate to pump liquid; the system is communicated with two pipelines of a throttling valve A and/or a throttling valve B through a pressure relief pipeline for relieving pressure fluid, the secondary throttling and pressure reduction are changed into low-pressure refrigerant through the pipeline of the throttling valve B, the low-pressure refrigerant enters a low-pressure reservoir for recycling, and the low-pressure refrigerant is supplied to a refrigeration intermediate pressure system through the pipeline of the throttling valve A for use; the pressure of the pressurized fluid is regulated by a pressure regulating valve to enter a two-position five-way electromagnetic valve, and the regulation of the pressure regulating valve enables the pressure to drive the speed of the pump liquid of the booster pump to change, so that the volume flow of the pump liquid can be regulated; the pressure regulating valve is connected with the electromagnetic valve A and/or the electromagnetic valve B so as to obtain high-pressure fluid serving as a power source, the electromagnetic valve A is connected with a high-pressure liquid reservoir liquid pipeline of the refrigerating system, and the electromagnetic valve B is connected with a high-pressure side gas pipeline of the refrigerating system. Wherein, one of the A throttle valve and the B throttle valve is selected for use. And the electromagnetic valve A and the electromagnetic valve B are selected to be used.

The utility model discloses with the more beneficial effect who has of background art be: by adopting the technical scheme, the characteristics that the high-low pressure difference of the refrigeration system and the high-pressure refrigerant are required to be throttled and depressurized to be supplied to the low-pressure side for use are effectively utilized, the pressure part of the fluid is converted into mechanical energy to pump the liquid, the flash gas generated by throttling is reduced, the energy efficiency of the refrigeration system is improved, and the electric energy loss of the pump liquid is not additionally increased; the pressure-driven piston booster pump liquid mode equipment has the advantages of simple structure, stable and reliable operation, strong adaptability, insensitivity to cavitation and low space requirement, the hydrostatic column pressure difference meets the requirement of overcoming the self resistance of a pipeline, the normal work of the pressure-driven booster pump cannot be influenced by factors such as the pressure fluctuation of a refrigerating system, the mixing of too much refrigerating machine oil, cold leakage vaporization and the like, and even the liquid level is too low, so an automatic alarm protection device and a recovery processing auxiliary facility are not needed; the pressure and the flow of the pump of the equipment can be adjusted to be matched with the actual requirement of the refrigeration system by simply adjusting the input pressure through the pressure adjusting valve, so that the refrigeration system can run more efficiently and stably.

Description of the drawings: FIG. 1 is a schematic view of the structure of the present invention

The specific implementation mode is as follows:

example (b): referring to fig. 1, a system pressure self-driven pump liquid supply pipeline system is characterized in that: the liquid pumping end of the pressure-driven booster pump 1 is respectively connected with a liquid outlet pipeline G1 and a liquid inlet pipeline G2 through a one-way valve 2, the liquid outlet pipeline G1 is externally connected with a refrigeration evaporator to supply liquid, and the liquid inlet pipeline G2 is connected with the bottom of a liquid phase region of a low-pressure circulating liquid accumulator 7 of the refrigeration system; two sides of a piston at a driving part of the pressure-driven booster pump 1 are respectively connected with corresponding passages of a two-position five-way electromagnetic valve 3 outside the pump through a pressure pipeline A G3 and a pressure pipeline B G4, an inlet of the two-position five-way electromagnetic valve 3 is communicated with a pressure regulating valve 4, and two pressure relief ports of the two-position five-way electromagnetic valve 3 are communicated with a pressure relief pipeline G5; the on-off control of the two-position five-way electromagnetic valve 3 is realized by alternately pressurizing and decompressing a pressure pipeline G3A and a pressure pipeline G4B, so that the driving piston in the pressure-driven booster pump 1 drives the pump liquid piston to continuously reciprocate to pump liquid; the refrigerant is communicated with two pipelines of the throttle valve A5 and/or the throttle valve B6 through a pressure relief pipeline G5 for relieving pressure fluid, is subjected to secondary throttling and pressure reduction when passing through the pipeline of the throttle valve B6, is changed into low-pressure refrigerant, enters a low-pressure reservoir 7 for recycling, and is supplied to a refrigeration intermediate pressure system for use through a pipeline G7 through the pipeline of the throttle valve A5; the pressure of the pressurized fluid is regulated by a pressure regulating valve 4 to enter a two-position five-way electromagnetic valve 3, and the regulation of the pressure regulating valve 4 enables the pressure to drive the pump liquid speed of a booster pump 1 to change, so that the volume flow of the pump liquid can be regulated; the pressure regulating valve 4 is connected with an A solenoid valve D1 and/or a B solenoid valve D2 so as to obtain high-pressure fluid serving as a power source, the A solenoid valve D1 is connected with a high-pressure liquid reservoir liquid pipeline G8 of the refrigeration system, and the B solenoid valve D2 is connected with a high-pressure side gas pipeline G6 of the refrigeration system; the throttle valve 5 and the throttle valve 6 are used by selecting one of the pipelines; the A solenoid valve D1 and the B solenoid valve D2 are selectively used.

Claims

1. A system pressure self-driven pump supplies liquid pipe-line system which characterized in that: the liquid pumping end of the pressure-driven booster pump (1) is respectively connected with a liquid outlet pipeline (G1) and a liquid inlet pipeline (G2) through a one-way valve (2), the liquid outlet pipeline (G1) is externally connected with a refrigeration evaporator to supply liquid, and the liquid inlet pipeline (G2) is connected with the bottom of a liquid phase region of a low-pressure circulation liquid storage device (7) of the refrigeration system; two sides of a piston at the driving part of the pressure-driven booster pump (1) are respectively connected with corresponding passages of a two-position five-way electromagnetic valve (3) outside the pump through a pressure pipeline A (G3) and a pressure pipeline B (G4), an inlet of the two-position five-way electromagnetic valve (3) is communicated with a pressure regulating valve (4), and two pressure relief ports of the two-position five-way electromagnetic valve (3) are communicated with a pressure relief pipeline G5; the on-off control of the two-position five-way electromagnetic valve (3) is used for alternately pressurizing and relieving the pressure of a pressure pipeline A (G3) and a pressure pipeline B (G4), so that the pressure drives a driving piston in the booster pump (1) to drive a pump liquid piston to continuously reciprocate to pump liquid; the two pipelines of the throttle valve A (5) and/or the throttle valve B (6) are communicated through a pressure relief pipeline (G5) for relieving pressure fluid, secondary throttling and pressure reduction are carried out through the pipeline of the throttle valve B (6) to become low-pressure refrigerant, the low-pressure refrigerant enters a low-pressure circulation liquid storage device (7) for circulation use, and the low-pressure refrigerant is supplied to a refrigeration intermediate pressure system for use through a pipeline (G7) through the pipeline of the throttle valve A (5); the pressure is adjusted by a pressure adjusting valve (4) of the pressurized fluid to enter a two-position five-way electromagnetic valve (3); the pressure regulating valve (4) is connected with an A solenoid valve (D1) and/or a B solenoid valve (D2) so as to obtain high-pressure fluid serving as a power source, the A solenoid valve (D1) is connected with a high-pressure liquid reservoir liquid pipeline (G8) of the refrigeration system, and the B solenoid valve (D2) is connected with a high-pressure side gas pipeline (G6) of the refrigeration system.

2. The system pressure self-driven pump supply line system of claim 1, wherein: and the pipeline of the throttle valve A (5) and the pipeline of the throttle valve B (6) are selected to be used.

3. The system pressure self-driven pump supply line system according to claim 1 or 2, wherein: the A solenoid valve (D1) and the B solenoid valve (D2) are selectively used.