Low-pressure-difference gas pipeline power generation system

Abstract

The utility model provides a low-pressure-difference gas pipeline power generation system which comprises a manual valve, a front pressure regulating valve, an electric ball valve, a pressure difference generator, a rear pressure regulating valve, a power supply controller and a storage battery, and the pressure difference generator, the power supply controller and the storage battery form a low-pressure-difference gas pipeline power generation module. When the manual valve and the front pressure regulating valve are in an open state, the power supply controller controls the electric ball valve to be opened, upstream gas is decompressed through the front pressure regulating valve and then enters the differential pressure generator to generate electricity and charge the storage battery, then the gas passes through the rear pressure regulating valve and then converges into the downstream pipeline, and when the electric quantity of the storage battery is enough, the electric ball valve is closed to stop generating electricity. And when the electric quantity is insufficient, the electric ball valve is opened to enable the differential pressure generator to generate electricity. The low-pressure-difference gas pipeline power generation system is low in investment cost, low in operation cost and high in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of gas power generation, and in particular to a low-pressure difference gas pipeline power generation system. Background Art

[0002] Pressure difference power generation is to convert the pressure energy (or kinetic energy) of the flowing gas in the pipeline into electrical energy. At present, the pressure difference power generation system using natural gas as the medium is either applied to medium and high voltage stations or requires additional electrical equipment, and all use turbine technology, with complex structure and high cost. However, many medium and low voltage regulating stations are far away from urban areas, and no power supply system was configured in the early stage of design and construction, so they cannot be applied.

[0003] Therefore, a low-pressure difference gas pipeline power generation system is urgently needed to provide stable and reliable operating energy for the maintenance, commissioning and intelligent upgrading and transformation of medium and low pressure regulating station equipment. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a low-pressure difference gas pipeline power generation system with low investment cost, low operating cost and high stability.

[0005] To solve the above problems, the technical solution of the utility model is:

[0006] A low-pressure difference gas pipeline power generation system comprises a manual valve, a front pressure regulating valve, an electric ball valve, a pressure difference generator, a rear pressure regulating valve, a power controller and a battery. The pressure difference generator, the power controller and the battery constitute a low-pressure difference gas pipeline power generation module. When working, the manual valve and the front pressure regulating valve are in an open state, the power controller controls the electric ball valve to open, and the upstream gas is reduced in pressure through the front pressure regulating valve and then enters the pressure difference generator to generate electricity and charge the battery. Subsequently, the gas passes through the rear pressure regulating valve and flows into the downstream pipeline. When the battery power is sufficient, the electric ball valve is closed to stop power generation. When the power is insufficient, the electric ball valve is opened again to enable the pressure difference generator to generate electricity.

[0007] Preferably, the low pressure difference gas pipeline power generation module includes a drive housing, a bearing spacer, a right sealing cover, a right support sleeve, an impeller, an electrical sealing box body, an electrical box sealing gasket, an electrical sealing box cover, a generator mounting seat, an isolation sleeve, an adjustment sleeve, a magnetic connection inner shaft, a left support sleeve, a magnetic coupling outer sleeve, a connecting plug, a first connector, a threading bellows, a left cover of the generator mounting seat, a second connector, a generator and a center shaft.

[0008] Preferably, the connections between the drive housing, the right sealing cover and the isolation sleeve are all provided with O-ring seals to form a closed pressure-bearing cavity.

[0009] Preferably, the impeller is assembled with the central shaft, the adjusting sleeve and the magnetically connected inner shaft, and the two ends are respectively installed in the closed pressure-bearing cavity through the left support sleeve and the right support sleeve. When the gas drives the impeller to rotate, it always works in the closed pressure-bearing cavity to avoid gas leakage.

[0010] Preferably, the drive housing, the generator mounting seat, and the left cover of the generator mounting seat form a closed cavity, and the generator is installed in the drive housing to prevent gas and dust in the external environment from entering the working cavity of the generator.

[0011] Preferably, the shaft end of the generator is connected to the magnetic coupling sleeve, which is sleeved on the outside of the magnetic connection inner shaft, and a certain gap is retained between the two. When the magnetic connection inner shaft rotates with the impeller, the magnetic coupling sleeve is driven to rotate under the action of magnetic force, thereby driving the generator shaft to rotate and generate electricity.

[0012] Preferably, the electrical sealed box body, electrical box sealing gasket, and electrical sealed box cover constitute a closed battery and control board working box, so that the battery and control board work in the closed box, preventing gas and dust in the environment from entering the battery and control board working box.

[0013] Preferably, the generator working chamber is sealed and connected to the battery and control panel working box by using a second connector, a first connector, a threading bellows and a sealing fastener.

[0014] Compared with the prior art, the utility model provides a low-pressure difference gas pipeline power generation system, which can convert the pressure difference energy of the gas at the inlet and outlet of the low-pressure difference gas pipeline generator installation pipeline into mechanical energy, and then drive the generator into electrical energy by the mechanical device inside the system, thereby realizing the conversion of gas pressure difference energy into electrical energy, and providing stable and reliable operating energy for the maintenance, commissioning and intelligent upgrading and transformation of medium and low pressure regulating station equipment. In addition, the low-pressure difference gas pipeline power generation system of the utility model requires a small pressure difference for operation, and does not require additional electrical equipment, and can achieve self-sufficient power supply, as the operating energy of medium and low pressure regulating station equipment, and controls and manages the use, storage, and system status of the generated electricity, and has the advantages of low investment cost, low operating cost, high stability, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0016] Figure 1 This is the principle diagram of the low-pressure difference gas pipeline power generation system of the utility model;

[0017] Figure 2 This is a structural diagram of the low-pressure difference gas pipeline power generation module of the utility model. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0019] Specifically, the utility model provides a low pressure difference gas pipeline power generation system, such as Figure 1 As shown, the low-pressure difference gas pipeline power generation system includes a manual valve 1, a front pressure regulating valve 2, an electric ball valve 3, a pressure difference generator 4, a rear pressure regulating valve 5, a manual valve 6, a main pressure reducing valve (working pressure regulator) 7, a power controller 8, a battery 9, a controller 10, and a power supply mode control 11, wherein the pressure difference generator 4, the power controller 8, and the battery 9 constitute a low-pressure difference gas pipeline power generation module. The controller 10 is with a remote control function, which performs logic judgment and command transmission, and the power controller 8 is used to receive commands from 10 to control the opening and closing of the electric ball valve 3.

[0020] During operation, the manual valve 1 and the pressure regulating valve 2 are in the open state. Pressure regulating valves are provided before and after the differential pressure generator 4. The front pressure regulating valve 2 and the rear pressure regulating valve 5 have been preset according to the inlet and outlet gas pressures of the pipeline, and can control the differential pressure before and after the generator within the range of 0.025MPa-0.1MPa, while ensuring that the outlet pressure will not affect the downstream pressure of the natural gas main pipeline; the power controller 8 controls the electric ball valve 3 to open, and the upstream gas is reduced in pressure through the front pressure regulating valve 2 and then enters the differential pressure generator 4 to generate electricity and charge the battery 9. The gas then passes through the rear pressure regulating valve 5 and is decompressed before being merged into the downstream pipeline. When the battery power is sufficient, the electric ball valve 3 is closed to stop power generation. When the power is insufficient, the electric ball valve 3 is opened again to allow the differential pressure generator 4 to generate electricity;

[0021] like Figure 2 As shown, the structure of the low-pressure difference gas pipeline power generation module is mainly composed of a drive housing 12, a bearing spacer 13, a right sealing cover 14, a right support sleeve 15, an impeller 16, an electrical sealing box body 17, an electrical box sealing gasket 18, an electrical sealing box cover 19, a generator mounting seat 20, an isolation sleeve 21, an adjustment sleeve 22, a magnetic connection inner shaft 23, a left support sleeve 24, a magnetic coupling outer sleeve 25, a connecting plug 26, a first connector 27, a threading bellows 28, a generator mounting seat left cover 29, a second connector 30, a generator 31, and a center shaft 32.

[0022] Among them: the connections between the drive housing 12, the right sealing cover 14, and the isolation sleeve 21 are all provided with O-ring seals to form a closed pressure-bearing cavity; the impeller 16 is assembled with the central shaft 32, the adjustment sleeve 22, and the magnetic connection inner shaft 23, and the two ends are respectively installed in the closed pressure-bearing cavity through the left support sleeve 24 and the right support sleeve 15; in the process of driving the impeller to rotate, the gas always works in the closed pressure-bearing cavity to avoid gas leakage.

[0023] The drive housing 12, the generator mounting base 20, and the left cover 29 of the generator mounting base form a closed cavity, and the generator 31 is installed in the drive housing 12 to prevent gas and dust in the external environment from entering the working cavity of the generator; the shaft end of the generator 31 is connected to the magnetic coupling sleeve 25, which is sleeved on the outside of the magnetic connection inner shaft 23, and a certain gap is retained between the two. When the magnetic connection inner shaft 23 rotates with the impeller, the magnetic coupling sleeve 25 is driven to rotate under the action of magnetic force, thereby driving the generator shaft to rotate and generate electricity.

[0024] The impeller of the pressure difference generator 4 of the utility model is arranged in a closed pressure-bearing cavity to avoid gas leakage; the generator is located in a separately sealed working cavity to meet the explosion-proof function; the impeller shaft drives the generator shaft to rotate and generate electricity in a non-contact manner (magnetic force).

[0025] The electrical sealed box body 17, electrical box sealing gasket 18, and electrical sealed box cover 19 of the utility model constitute a sealed battery and control panel working box body, so that the battery and control panel work in the sealed box body, and prevent gas and dust in the environment from entering the battery and control panel working box body, causing unsafe factors. The generator working cavity and the battery and control panel working box body are sealed and connected by a second connector 30, a first connector 27, a threading bellows 28, and a sealing fastener, so as to prevent gas and dust in the environment from entering the battery and control panel working box body, and causing safety accidents.

[0026] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A low pressure difference gas pipeline power generation system, characterized in that: The low-pressure difference gas pipeline power generation system includes a manual valve, a front pressure regulating valve, an electric ball valve, a pressure difference generator, a rear pressure regulating valve, a power controller, and a battery. The pressure difference generator, power controller, and battery constitute a low-pressure difference gas pipeline power generation module. When working, the manual valve and the front pressure regulating valve are in an open state, and the power controller controls the electric ball valve to open. The upstream gas is reduced in pressure by the front pressure regulating valve and then enters the pressure difference generator to generate electricity and charge the battery. Then the gas passes through the rear pressure regulating valve and flows into the downstream pipeline. When the battery power is sufficient, the electric ball valve is closed to stop power generation. When the power is insufficient, the electric ball valve is opened again to enable the pressure difference generator to generate electricity.

2. The low pressure difference gas pipeline power generation system according to claim 1, characterized in that: The low-pressure difference gas pipeline power generation module includes a drive housing, a bearing spacer, a right sealing cover, a right support sleeve, an impeller, an electrical sealing box body, an electrical box sealing gasket, an electrical sealing box cover, a generator mounting seat, an isolation sleeve, an adjustment sleeve, a magnetic connection inner shaft, a left support sleeve, a magnetic coupling outer sleeve, a connecting plug, a first connector, a threading bellows, a left cover of the generator mounting seat, a second connector, a generator and a center shaft.

3. The low pressure difference gas pipeline power generation system according to claim 2, characterized in that: The connections between the drive housing, the right sealing cover and the isolation sleeve are all provided with O-ring seals to form a closed pressure-bearing cavity.

4. The low pressure difference gas pipeline power generation system according to claim 3, characterized in that: The impeller is assembled with the central shaft, the adjusting sleeve and the magnetically connected inner shaft, and the two ends are respectively installed in the closed pressure-bearing cavity through the left supporting sleeve and the right supporting sleeve. When the gas drives the impeller to rotate, it always works in the closed pressure-bearing cavity to avoid gas leakage.

5. The low pressure difference gas pipeline power generation system according to claim 2, characterized in that: The drive housing, the generator mounting seat, and the left cover of the generator mounting seat form a closed cavity, and the generator is installed in the drive housing to prevent gas and dust in the external environment from entering the working cavity of the generator.

6. The low pressure difference gas pipeline power generation system according to claim 2, characterized in that: The shaft end of the generator is connected to the magnetic coupling outer sleeve, which is sleeved on the outside of the magnetic coupling inner shaft, and a certain gap is retained between the two. When the magnetic coupling inner shaft rotates with the impeller, the magnetic coupling outer sleeve is driven to rotate under the action of magnetic force, thereby driving the generator shaft to rotate and generate electricity.

7. The low pressure difference gas pipeline power generation system according to claim 2, characterized in that: The electrical sealed box body, electrical box sealing gasket and electrical sealed box cover constitute a sealed battery and control board working box body, so that the battery and the control board work in the sealed box body, and prevent gas and dust in the environment from entering the battery and control board working box body.

8. The low pressure difference gas pipeline power generation system according to claim 7, characterized in that: The generator working chamber is sealed and connected with the battery and the control panel working box by using the second connector, the first connector, the threading bellows and the sealing fastener.

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