Electromagnetic coupling gas booster pump

Abstract

The invention provides an electromagnetic coupling gas booster pump. The electromagnetic coupling gas booster pump solves the problems that an existing gas booster pump is complex in structure, large in size and low in transmission efficiency. Comprising a hollow pump body with two through ends, a motor stator is arranged on the inner wall of the pump body; the two ends of the pump body are connected with a first-stage pressure cylinder and a second-stage pressure cylinder respectively, the first-stage pressure cylinder is provided with an air inlet pipe for introducing compressed air, the second-stage pressure cylinder is provided with an exhaust pipe for exhausting the compressed air, and the first-stage pressure cylinder and the second-stage pressure cylinder are communicated through a connecting pipe arranged outside the pump body. A motor rotor electromagnetically coupled with the motor stator is arranged in the pump body, and the two ends of the motor rotor are slidably connected with the first-stage pressure cylinder and the second-stage pressure cylinder respectively. The gas booster pump is widely applied to the technical field of gas booster pumps.

Description

Technical Field

[0001] The present application relates to the technical field of gas booster pumps, and more specifically, to an electromagnetically coupled gas booster pump. Background Art

[0002] As clean energy receives more and more attention, the application, development and usage of clean gases represented by hydrogen are also increasing. Gas booster pumps are key equipment in the production and application of clean gases. They can boost the gas to a suitable pressure range according to production and use needs, and are widely used in gas storage and transportation.

[0003] There are many types of existing gas booster pumps. Some gas booster pumps are pressurized by installing a linear electric cylinder outside the pump body, and the electric cylinder drives the piston rod to reciprocate to complete the gas pressurization; some gas booster pumps are air-driven, liquid-driven, or gas-liquid-driven to complete the gas pressurization. There are some problems with the above existing gas booster pumps: the air-driven gas booster pump has a complex structure and needs to be equipped with an air compressor. The equipment is large in size and occupies a large area, is not easy to carry, and has a small gas flow rate; the liquid-driven or gas-liquid-driven gas booster pump is prone to hydraulic cylinder leakage and compressed gas contamination during long-term use, and the equipment is noisy when switching; the piston and piston rod are easy to wear, the transmission efficiency is low, and the operating energy consumption is high, resulting in low production efficiency. Summary of the invention

[0004] In order to solve the above existing problems, the technical solution adopted by the present invention is: to provide an electromagnetically coupled gas booster pump, which solves the problems of complex structure, large volume and low transmission efficiency of the existing gas booster pump. It includes a pump body with a hollow interior and two ends through; the inner wall of the pump body is provided with a motor stator; the two ends of the pump body are respectively connected with a primary booster cylinder and a secondary booster cylinder, the primary booster cylinder is provided with an air intake pipe for introducing compressed gas, the secondary booster cylinder is provided with an exhaust pipe for discharging compressed gas, and the primary booster cylinder and the secondary booster cylinder are connected through a pipe provided outside the pump body; a motor mover electromagnetically coupled to the motor stator is provided inside the pump body, and the two ends of the motor mover are respectively slidably connected with the primary booster cylinder and the secondary booster cylinder.

[0005] Preferably, a guide shaft is provided between the first-stage booster cylinder and the second-stage booster cylinder along the length direction of the pump body, and the guide shaft is slidably connected to the motor mover.

[0006] Preferably, both ends of the motor mover extend into the first-stage boost cylinder and the second-stage boost cylinder respectively, and valve bodies are provided at the connections between the motor mover and the first-stage boost cylinder and the second-stage boost cylinder to prevent air leakage, and both ends of the motor mover are slidingly and sealingly connected to the first-stage boost cylinder and the second-stage boost cylinder respectively.

[0007] Preferably, there are multiple gas booster pumps, which are connected in series; the exhaust pipe of the last gas booster pump is connected to the intake pipe of the next gas booster pump.

[0008] Preferably, there are multiple gas booster pumps, and the air inlet pipes of the multiple gas booster pumps are connected in parallel.

[0009] Preferably, both ends of the motor mover are provided with mover sealing rings.

[0010] Preferably, the motor stator comprises a stator core arranged on the pump body and a stator winding arranged on the stator core, and the motor mover is electromagnetically coupled with the stator windings on both sides thereof.

[0011] Preferably, one-way valves are provided on the air inlet pipe, both ends of the connecting pipe and the exhaust pipe along the direction of gas movement.

[0012] Preferably, a mover cavity exhaust pipe is provided on the pump body, one end of the mover cavity exhaust pipe is connected to the inside of the pump body, and the other end is connected to the air inlet pipe; a one-way valve is provided at the end of the mover cavity exhaust pipe connected to the pump body.

[0013] Preferably, the motor mover, the first-stage booster cylinder and the second-stage booster cylinder are coaxially arranged.

[0014] The beneficial effects of the present invention are as follows: the motor mover performs linear reciprocating motion under the electromagnetic coupling with the motor stator, and the motor mover completely converts the electromagnetic coupling into motion thrust, thereby realizing efficient energy transmission, high energy utilization rate, reducing unnecessary energy waste, and reducing production costs; the secondary compression of the gas is completed through the reciprocating motion of the motor mover, and the gas is quickly compressed to a high-pressure state with high compression efficiency; the motor mover is built into the pump body, and the motor mover directly compresses the gas, with a simple structure, reducing the volume of the entire gas booster pump, and low equipment production cost; when in use, the pump body protects the motor so that it is not easy to wear, thereby extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a front view schematic diagram of the present invention; Figure 3 It is a top view schematic diagram of the present invention; Figure 4 for Figure 3Sectional view at AA in the middle; Figure 5 It is a schematic diagram of multiple gas booster pumps connected in series; Figure 6 This is a schematic diagram of multiple gas booster pumps in parallel.

[0017] Explanation of symbols in the figure: 1. Pump body; 2. Motor stator; 3. First-stage boost cylinder; 4. Second-stage boost cylinder; 5. Inlet pipe; 6. Exhaust pipe; 7. Connecting pipe; 8. Motor mover; 9. Mover cavity exhaust pipe; 10. Guide shaft; 11. Mover sealing ring; 12. Stator core; 13. Stator winding; 14. One-way valve. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] It should be noted that the terms "primary" and "secondary" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "primary" and "secondary" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] An electromagnetically coupled gas booster pump provided in an embodiment of the present application is now described.

[0022] See also Figures 1 to 4, is a schematic diagram of the structure of the present invention, the electromagnetically coupled gas booster pump comprises a pump body 1 which is hollow inside and through at both ends; a motor stator 2 is arranged on the inner wall of the pump body 1; a primary booster cylinder 3 and a secondary booster cylinder 4 are respectively connected at both ends of the pump body 1, the primary booster cylinder 3 is provided with an air inlet pipe 5 for introducing compressed gas, the secondary booster cylinder 4 is provided with an exhaust pipe 6 for discharging compressed gas, the primary booster cylinder 3 and the secondary booster cylinder 4 are connected through a connecting pipe 7 arranged outside the pump body 1; a motor mover 8 which is electromagnetically coupled with the motor stator 2 is arranged inside the pump body 1, and the two ends of the motor mover 8 are respectively slidably connected with the primary booster cylinder 3 and the secondary booster cylinder 4.

[0023] Specifically, when in use, the motor stator 2 is energized to generate a magnetic field, and the compressed gas enters the primary boost cylinder 3 through the intake pipe 5. Under the electromagnetic coupling between the motor stator 2 and the motor mover 8, the motor mover 8 first moves toward the primary boost cylinder 3, and the end of the motor mover 8 compresses the gas in the primary boost cylinder 3 once. The gas in the primary boost cylinder 3 enters the secondary boost cylinder 4 through the pipe 7. At this time, the motor mover 8 moves toward the secondary boost cylinder 4 to perform secondary compression on the compressed gas in the secondary boost cylinder 4. In the primary boost cylinder 3, the gas completes the boosting process from low pressure to medium pressure; in the secondary boost cylinder 4, the gas after the primary compression completes the compression process from medium pressure to high pressure. The compressed gas after secondary compression reaches the standard and is discharged from the exhaust pipe 6 on the secondary boost cylinder 4. Under the electromagnetic coupling with the motor stator 2, the motor mover 8 performs linear reciprocating motion, and the motor mover 8 completely converts the electromagnetic coupling into motion thrust, realizing efficient energy transmission, high energy utilization, reducing unnecessary energy waste, and reducing production costs. The secondary compression of the gas is completed through the reciprocating motion of the motor mover 8, and the gas is quickly compressed to a high-pressure state with high compression efficiency. The electromagnetic control is precise and flexible. The staff can adjust the electromagnetic parameters and frequency conversion form in time according to the actual production situation to control the movement of the motor mover 8, control the number of reciprocating times of the motor mover 8, adjust the displacement, and flexibly and accurately adjust the working state of the gas booster pump to adapt to a variety of production scenarios. The motor mover 8 is built into the pump body 1. The motor mover 8 directly compresses the gas, with a simple structure, reducing the volume of the entire gas booster pump, and low equipment production cost; when in use, the pump body 1 protects the motor so that it is not easy to wear and extend the service life of the motor.

[0024] Furthermore, a guide shaft 10 is provided between the first-stage booster cylinder 3 and the second-stage booster cylinder 4 along the length direction of the pump body 1 , and the guide shaft 10 is slidably connected to the motor mover 8 ; the motor mover 8 performs reciprocating linear motion along the guide shaft 10 .

[0025] Furthermore, both ends of the motor mover 8 extend into the first-stage boost cylinder 3 and the second-stage boost cylinder 4, respectively. The connection between the motor mover 8 and the first-stage boost cylinder 3 and the second-stage boost cylinder 4 is provided with a valve body to prevent air leakage, and both ends of the motor mover 8 are respectively connected to the first-stage boost cylinder 3 and the second-stage boost cylinder 4 in a sliding and sealing manner; specifically, the valve body improves the sealing effect and sealing stability of the first-stage boost cylinder 3 and the second-stage boost cylinder 4. Under the electromagnetic coupling with the motor stator 2, the motor mover 8 continuously compresses the gas in the first-stage boost cylinder 3 and the second-stage boost cylinder 4.

[0026] In one of the embodiments, a sealing performance monitoring system is externally connected to the first-stage boost cylinder 3 and the second-stage boost cylinder 4 to detect the internal sealing status in real time. Once gas leakage is detected in the first-stage boost cylinder 3 and the second-stage boost cylinder 4, the sealing performance monitoring system will promptly send out an alarm signal.

[0027] See also Figure 5 , is a schematic diagram of a plurality of gas booster pumps connected in series. In one embodiment, there are a plurality of gas booster pumps, which are connected in series; the exhaust pipe 6 of the last gas booster pump is connected to the intake pipe 5 of the next gas booster pump. The electromagnetically coupled gas booster pump provided by the present invention has a simple structure, is easy to install, is easy to stack, and is convenient for modular combination; when high pressure of compressed gas is required, multiple gas booster pumps can be connected in series, the gas flow rate remains unchanged, and high pressure is quickly achieved through a multi-stage booster cylinder.

[0028] See also Figure 6 , is a schematic diagram of multiple gas booster pumps in parallel. In one embodiment, there are multiple gas booster pumps, and the intake pipes 5 of the multiple gas booster pumps are connected in parallel. When a large flow of compressed gas is required, the booster pumps can be connected in series; the compressed gas pressure remains unchanged, and the flow rate is increased simultaneously through multiple booster cylinders of the same level.

[0029] Furthermore, both ends of the motor mover 8 are provided with mover sealing rings 11 to increase a certain resistance and prevent the motor mover 8 from completely entering the boost cylinders on both sides.

[0030] Furthermore, the motor stator 2 includes a stator core 12 disposed on the pump body 1 and a stator winding 13 disposed on the stator core 12, and the motor mover 8 is electromagnetically coupled with the stator windings 13 on both sides thereof. When the current passes through the stator winding 13, a magnetic field is generated, and the magnetic field is electromagnetically coupled with the motor mover 8, generating a force to move the motor mover 8, and the reciprocating motion of the motor mover 8 realizes the pressurization of the gas in the first-stage boost cylinder 3 and the second-stage boost cylinder 4. In different embodiments, according to different production needs, different coil turns, shapes and positions are designed, and magnetic materials are reasonably selected, which can improve the magnetic field distribution of the motor stator 2 and the motor mover 8 and improve the electromagnetic coupling efficiency.

[0031] Furthermore, one-way valves 14 are provided on the inlet pipe 5, both ends of the connecting pipe 7 and the exhaust pipe 6 along the direction of gas movement to prevent the gas from flowing in the reverse direction.

[0032] Furthermore, the pump body 1 is provided with a mover cavity exhaust pipe 9, one end of which is connected to the inside of the pump body 1, and the other end is connected to the air inlet pipe 5; a one-way valve 14 is provided at the end of the mover cavity exhaust pipe 9 connected to the pump body 1. When the motor mover 8 reciprocates, a small amount of gas leaks into the pump body 1 from the connection between the motor mover 8 and the first-stage booster cylinder 3 and the second-stage booster cylinder 4. After the accumulated compressed gas reaches a certain pressure, it enters the first-stage booster cylinder 3 through the mover cavity exhaust pipe 9 for recompression.

[0033] Furthermore, the motor mover 8, the first-stage boost cylinder 3 and the second-stage boost cylinder 4 are coaxially arranged.

[0034] In one of the embodiments, the motor stator 2 is connected to a high-precision sensor component and a controller component. The staff pre-establishes an accurate boost control model according to production requirements, and uses the sensor component and the controller component to monitor and adjust key parameters such as current intensity and frequency during the boost process in real time, thereby achieving accurate control of the boost degree and speed of the gas boost pump.

[0035] In one embodiment, a cooling water jacket is provided outside the pump body 1, and circulating cooling water is introduced into the cooling water jacket to cool the motor inside the pump body 1 and eliminate the heat generated by the reciprocating motion of the motor mover 8 in a timely manner.

[0036] The working principle of the present invention is as follows: when in use, the motor stator 2 is energized to generate a magnetic field, and the compressed gas enters the primary boost cylinder 3 through the intake pipe 5. Under the electromagnetic coupling between the motor stator 2 and the motor mover 8, the motor mover 8 first moves toward the primary boost cylinder 3, and the end of the motor mover 8 compresses the gas in the primary boost cylinder 3 once. The gas in the primary boost cylinder 3 enters the secondary boost cylinder 4 through the connecting pipe 7. At this time, the motor mover 8 moves toward the secondary boost cylinder 4 to perform secondary compression on the compressed gas in the secondary boost cylinder 4. In the primary boost cylinder 3, the gas completes the boosting process from low pressure to medium pressure; in the secondary boost cylinder 4, the gas after the primary compression completes the compression process from medium pressure to high pressure. The compressed gas after secondary compression reaches the standard and is discharged from the exhaust pipe 6 on the secondary boost cylinder 4.

[0037] In the present invention, the motor mover 8 performs linear reciprocating motion under the electromagnetic coupling with the motor stator 2, and the motor mover 8 completely converts the electromagnetic coupling into motion thrust, thereby realizing efficient energy transfer, high energy utilization, reducing unnecessary energy waste, and reducing production costs; the reciprocating motion of the motor mover 8 completes the secondary compression of the gas, and the gas is quickly compressed to a high-pressure state with high compression efficiency; the motor mover 8 is built into the pump body 1, and the motor mover 8 directly compresses the gas, with a simple structure, reducing the volume of the entire gas booster pump, and low equipment production cost; when in use, the pump body 1 protects the motor so that it is not easy to wear, thereby extending the service life of the motor.

[0038] The above-mentioned specific implementation methods do not cover the entire protection scope of this application. Modifications or equivalent replacements of the invention should all fall within the patent coverage requirements of this application. In the present invention, the above-mentioned embodiments are only used to illustrate the technical solutions of this application, rather than to limit them. Although this application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be equivalently replaced. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of this application, and should all be included in the protection scope of this application.

Claims

1. An electromagnetically coupled gas booster pump, comprising a pump body with a hollow interior and two through-holes, characterized in that: A motor stator is provided on the inner wall of the pump body; a first-stage boosting cylinder and a second-stage boosting cylinder are respectively connected to two ends of the pump body, the first-stage boosting cylinder is provided with an air inlet pipe for introducing compressed gas, the second-stage boosting cylinder is provided with an exhaust pipe for discharging compressed gas, and the first-stage boosting cylinder and the second-stage boosting cylinder are connected via a connecting pipe provided on the outside of the pump body; a motor mover electromagnetically coupled to the motor stator is provided inside the pump body, and two ends of the motor mover are respectively slidably connected to the first-stage boosting cylinder and the second-stage boosting cylinder.

2. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: A guide shaft is provided between the first-stage booster cylinder and the second-stage booster cylinder along the length direction of the pump body, and the guide shaft is slidably connected to the motor mover.

3. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: The two ends of the motor mover extend into the first-stage booster cylinder and the second-stage booster cylinder respectively, and valve bodies for preventing air leakage are respectively provided at the connections between the motor mover and the first-stage booster cylinder and the second-stage booster cylinder. The two ends of the motor mover are respectively connected to the first-stage booster cylinder and the second-stage booster cylinder in a sliding and sealing manner.

4. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: There are multiple gas booster pumps, which are connected in series; the exhaust pipe of the gas booster pump at the previous position is connected to the intake pipe of the gas booster pump at the next position.

5. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: There are multiple gas booster pumps, and the air inlet pipes of the multiple gas booster pumps are connected in parallel.

6. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: Both ends of the motor mover are respectively provided with mover sealing rings.

7. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: The motor stator comprises a stator core arranged on the pump body and a stator winding arranged on the stator core, and the motor mover is electromagnetically coupled with the stator windings on both sides thereof.

8. An electromagnetically coupled gas booster pump as claimed in claim 1, characterized in that: One-way valves are arranged on the air inlet pipe, both ends of the connecting pipe and the exhaust pipe along the direction of gas movement.

9. An electromagnetically coupled gas booster pump as claimed in claim 8, characterized in that: The pump body is provided with a mover cavity exhaust pipe, one end of which is connected to the inside of the pump body, and the other end is connected to the air inlet pipe; the one-way valve is provided at the end of the mover cavity exhaust pipe connected to the pump body.

10. The electromagnetically coupled gas booster pump according to claim 1, characterized in that: The motor mover, the first-stage booster cylinder and the second-stage booster cylinder are coaxially arranged.

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