Small gas booster pump capable of withstanding high pressure and large flow rate

Abstract

The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention comprises an electrical system and a circulation pump cavity, wherein the electrical system and the circulation pump cavity are connected together by a connecting component, and the circulation pump cavity comprises a housing, wherein a plunger pump is arranged in the housing, and a cavity gas inlet and a cavity gas outlet are arranged on the housing, wherein the plunger pump gas outlet extends out of the housing, and the cavity gas outlet is connected to the plunger pump gas inlet, so that the input gas pressure of the plunger pump is equal to the gas pressure inside the housing. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention has the characteristics of small size, light weight and low power consumption. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention has broad application prospects in the fields of chemical industry, aerospace, fire protection, etc.

Description

Technical Field

[0001] The invention belongs to the field of mechanical transmission, and mainly relates to a miniaturized gas booster pump capable of withstanding high pressure and large flow. Technical Background

[0002] As a relay device for increasing gas pressure and maintaining gas circulation, the gas booster pump has broad application prospects in the fields of chemical industry, aerospace, fire protection, etc. The working principle of the gas circulation pump is as follows: driven by the motor, the mechanical eccentric device inside the circulation pump drives the cavity inside the pump to do reciprocating motion, thereby compressing and stretching the gas in the fixed volume pump cavity to form a vacuum (negative pressure), and a pressure difference is generated between the pump suction port and the inlet gas. Under the action of the pressure difference, the gas is sucked into the pump cavity, and after compression, the low-pressure inlet gas becomes high-pressure gas and is discharged from the exhaust port. This cycle continues to form a stable gas boost.

[0003] The current gas booster pump has the following main disadvantages: 1. Poor high pressure resistance. Gas circulation pumps are often used in various high pressure occasions. The high pressure gas inside it forms a huge pressure difference with the normal pressure outside. The huge pressure difference puts forward strict requirements on the high pressure resistance and sealing of the internal components of the circulation pump. However, due to the influence of materials, assembly process and sealing method, the pressure resistance of the current circulation pump needs to be improved. 2. The driving flow is small. When the gas pressure in the circulation pump is high, the leakage of the device itself will be large. In addition, the flow that can be driven is generally small due to the influence of air tightness and input power. 3. The volume is large and bulky. In order to be able to output high pressure gas, each component of the gas circulation pump, such as pipelines, swivels, gas pistons and pipe joints, needs to be designed to withstand high pressure, resulting in more materials for each component, and the volume and weight are relatively large. 4. The power consumption is large. Due to the large pressure difference between the internal and external parts of the circulation pump swivel and the heavy parts, the input power required for the motors and compressors required to drive the various components is large, resulting in a large overall power consumption of the circulation pump. Summary of the invention

[0004] The object of the present invention is to provide a miniaturized gas booster pump capable of withstanding high pressure and large flow rate.

[0005] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention comprises an electrical system and a circulating pump cavity, wherein the electrical system and the circulating pump cavity are connected together by a connecting component, wherein the circulating pump cavity comprises a shell, wherein a plunger pump is arranged in the shell, and a cavity gas inlet and a cavity gas outlet are arranged on the shell, wherein the plunger pump gas outlet extends out of the shell, and the cavity gas outlet is connected to the plunger pump gas inlet, so that the input gas pressure of the plunger pump is equal to the internal gas pressure of the shell.

[0006] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention has pressure sensors disposed at the plunger pump gas outlet and the plunger pump gas inlet, respectively.

[0007] The present invention provides a miniaturized gas booster pump capable of withstanding high pressure and large flow, wherein the electrical system comprises a switch, a frequency converter, an electric wire, a connector and a motor connected in sequence; the connecting component comprises a coupling; the circulating pump cavity also comprises a circulating pump shaft, a crankshaft connecting rod, a one-way valve, an air outlet duct, a crankshaft cavity, an air inlet duct and a dynamic sealing structure; one end of the circulating pump shaft is connected to the motor through a coupling, the other end of the circulating pump shaft is connected to the crankshaft connecting rod, the crankshaft cavity is arranged in the housing, the crankshaft connecting rod is arranged in the crankshaft cavity, there are two plunger pumps, the crankshaft connecting rods are respectively connected to the pistons of the two plunger pumps, the gas inlet of the plunger pump is connected to the air inlets of the two plunger pumps through the air inlet duct, and the gas outlet of the plunger pump is connected to the air outlets of the two plunger pumps through the air outlet duct.

[0008] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, wherein the connecting components further include: a motor bracket, a base plate and a circulating pump cavity fixing piece, wherein the motor bracket and the circulating pump cavity fixing piece are both arranged on the base plate, the motor bracket is used to support the motor, and the circulating pump cavity fixing piece is used to support the housing.

[0009] The miniaturized gas booster pump of the present invention is resistant to high pressure and large flow, wherein the motor is an AC motor, the rotation speed of the motor is adjusted by a frequency converter, the crankshaft connecting rod passes through the housing, and is connected to the circulation pump shaft through a dynamic sealing structure, the rotation of the circulation pump shaft drives the rotation of the crankshaft connecting rod, the dynamic sealing structure is connected to the circulation pump shaft by a packing seal, and the dynamic sealing structure and the housing are also connected by a packing seal.

[0010] The invention relates to a miniaturized gas booster pump capable of withstanding high pressure and large flow rate, wherein two plunger pumps are arranged in parallel along the axial direction of the crankshaft connecting rod inside a housing and in contact with the bottom of the housing.

[0011] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, wherein the plunger pump is a fixed-displacement plunger pump, and the flow rate of the compressed gas at its outlet is proportional to the rotation speed of the plunger pump.

[0012] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention has a one-way valve installed on the air inlet conduit and the air outlet conduit respectively to maintain the one-way nature of the air inlet and air outlet of the plunger pump.

[0013] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention has an outer surface of a shell designed in the form of fins, so that the heat generated by the plunger pump during operation can be dissipated into the surrounding atmosphere through the fins of the shell.

[0014] The miniaturized gas booster pump with high pressure resistance and large flow rate of the present invention installs the core component plunger pump used for gas boosting in a cavity whose internal air pressure is equal to the input gas pressure of the plunger pump, so as to reduce the pressure difference between the inside and outside of the plunger pump, reduce the pressure resistance requirement of the plunger pump, reduce gas leakage, and increase its flow regulation ability, thereby realizing the improvement of the overall pressure resistance and flow output capacity of the gas circulation pump. In addition, since the pressure difference between the inside and outside of the core component plunger pump is greatly reduced, under the premise of driving the same pressure and flow gas, a plunger pump with less material, lower pressure resistance and smaller input power will be adopted, thereby reducing the volume, weight and input power of the plunger pump. Therefore, compared with the traditional gas circulation pump, the miniaturized gas booster pump with high pressure resistance and large flow rate of the present invention has the characteristics of small volume, light weight and low power consumption. The miniaturized gas booster pump with high pressure resistance and large flow rate of the present invention has broad application prospects in the fields of chemical industry, aerospace, fire protection, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the structural schematic diagram of the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention;

[0016] Figure 2 It is a front view of the structural schematic diagram of the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention;

[0017] Figure 3 It is a schematic diagram of the internal gas flow of the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention;

[0018] Figure 4 is a top view of a schematic structural diagram of a shell;

[0019] Figure 5 It is a front view of the structural schematic diagram of the shell;

[0020] Figure 6 It is a schematic diagram of the structure of the external fins of the shell.

[0021] In the figure:

[0022] 1Electrical system 2Circulation pump cavity 3Connection components

[0023] 101 switch 102 inverter 103 wire 104 connector 105 motor

[0024] 201 circulation pump shaft 202 crankshaft connecting rod 203 housing 204 cavity gas inlet 205 plunger pump gas outlet 206 pressure sensor 207 check valve 208 gas outlet duct 209 crankshaft cavity 210 plunger pump 211 cavity gas outlet 212 plunger pump gas inlet 213 gas inlet duct 214 dynamic sealing structure 2031 cover plate 2032 screw 2033 bottom cavity 2034 fin

[0025] 301 motor bracket 302 coupling 303 base plate 304 circulating pump cavity fixing part DETAILED DESCRIPTION

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention comprises an electrical system 1 and a circulating pump cavity 2, wherein the electrical system 1 and the circulating pump cavity 2 are connected together by a connecting component 3, wherein the circulating pump cavity 2 comprises a shell 203, wherein a plunger pump 210 is arranged in the shell, and a cavity gas inlet 204 and a cavity gas outlet 211 are arranged on the shell 203, wherein the plunger pump gas outlet 205 extends out of the shell, and the cavity gas outlet 211 is connected to the plunger pump gas inlet 212, so that the input gas pressure of the plunger pump is equal to the internal gas pressure of the shell.

[0027] In the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, a pressure sensor 206 is provided at the plunger pump gas outlet 205 and the plunger pump gas inlet 212 respectively.

[0028] The miniaturized gas booster pump with high pressure and large flow rate of the present invention, wherein the electrical system 1 comprises a switch 101, a frequency converter 102, a wire 103, a connector 104, and a motor 105 connected in sequence; the connecting component 3 comprises a coupling 302; the circulating pump cavity 2 also comprises a circulating pump shaft 201, a crankshaft connecting rod 202, a one-way valve 207, an air outlet conduit 208, a crankshaft cavity 209, an air inlet conduit 213, and a dynamic sealing structure 214, and one end of the circulating pump shaft 201 is connected to the motor 105 through The coupling 302 is connected, the other end of the circulating pump shaft 201 is connected to the crankshaft connecting rod 202, the crankshaft chamber 209 is arranged in the shell, the crankshaft connecting rod 202 is arranged in the crankshaft chamber 209, there are two plunger pumps 210, the crankshaft connecting rod 202 is respectively connected to the pistons of the two plunger pumps 210, the plunger pump gas inlet 212 is connected to the air inlet of the two plunger pumps 210 through the air inlet duct 213, and the plunger pump gas outlet 205 is connected to the air outlet of the two plunger pumps 210 through the air outlet duct 208.

[0029] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, wherein the connecting component 3 further comprises: a motor bracket 301, a base plate 303 and a circulating pump cavity fixing piece 304, wherein the motor bracket 301 and the circulating pump cavity fixing piece 304 are both arranged on the base plate 303, the motor bracket 301 is used to support the motor 105, and the circulating pump cavity fixing piece 304 is used to support the housing.

[0030] The miniaturized gas booster pump of the present invention is resistant to high pressure and large flow, wherein the motor 105 is an AC motor, the speed of the motor is adjusted by the frequency converter 102, the crankshaft connecting rod 202 passes through the housing 203, and is connected to the circulation pump shaft 201 through the dynamic sealing structure 214, the rotation of the circulation pump shaft 201 drives the rotation of the crankshaft connecting rod 202, the dynamic sealing structure 214 is connected to the circulation pump shaft 201 by a packing seal, and the dynamic sealing structure 214 is also connected to the housing 203 by a packing seal.

[0031] In the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, two plunger pumps 210 are arranged in parallel along the axial direction of the crankshaft connecting rod 202 inside the housing 203 and in contact with the bottom of the housing 203 .

[0032] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, wherein the plunger pump is a fixed-displacement plunger pump, and the flow rate of the compressed gas at its outlet is proportional to the rotation speed of the plunger pump.

[0033] The miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention has a one-way valve 207 installed on the air inlet conduit 213 and the air outlet conduit 208 respectively, so as to maintain the one-way nature of the air inlet and air outlet of the plunger pump 210 .

[0034] In the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention, the outer surface of the housing 203 is designed in the form of fins, so that the heat generated by the plunger pump 210 during operation can be dissipated into the surrounding atmosphere through the fins 2034 of the housing 203 .

[0035] The technical solution of the present invention aims at the shortcomings of the current gas circulation pump, such as poor pressure resistance, small flow rate, large volume and high power consumption, and proposes a miniaturized gas booster pump with high pressure and large flow capacity. The main feature of the gas booster pump is that the core component plunger pump used for gas boosting is installed in a cavity whose internal air pressure is equal to the input gas pressure of the plunger pump, so as to reduce the pressure difference between the inside and outside of the plunger pump, reduce the pressure resistance requirement of the plunger pump, reduce gas leakage, and increase its flow regulation ability, thereby realizing the improvement of the overall pressure resistance and flow output capacity. In addition, since the pressure difference between the inside and outside of the core component plunger pump is greatly reduced, under the premise of driving the same pressure and flow gas, a plunger pump with less material, lower pressure resistance and smaller input power will be adopted, thereby reducing the volume, weight and input power of the plunger pump. Therefore, compared with the traditional gas circulation pump, the miniaturized gas booster pump with high pressure and large flow of the present invention has the characteristics of small volume, light weight and low power consumption. The miniaturized gas booster pump with high pressure and large flow of the present invention has broad application prospects in the fields of chemical industry, aerospace, fire protection, etc.

[0036] The crankshaft connecting rod 202 passes through the middle of the housing 203 and is connected to the circulation pump shaft 201 through the dynamic sealing structure 214. The rotation of the circulation pump shaft 201 drives the rotation of the crankshaft connecting rod 202. In order to achieve the sealing inside the housing 203, the dynamic sealing structure 214 is connected to the circulation pump shaft 201 by a packing seal, and the dynamic sealing structure 214 is also connected to the housing 203 by a packing seal.

[0037] The two plunger pumps 210 are arranged in parallel along the axial direction of the crankshaft connecting rod 202 inside the shell 203 and are in good contact with the bottom of the shell 203. The two plunger pumps 210 are driven by the crankshaft connecting rod 202, and the crankshaft connecting rod 202 is installed inside the crankshaft cavity 209. On the one hand, the crankshaft cavity 209 is connected to the two plunger pumps 210 to fix their positions, thereby ensuring that the two are in good contact and do not shift during the process of the crankshaft connecting rod 202 driving the plunger pump 210. On the other hand, it is fixed to the shell 203 to achieve the purpose of fixing the plunger pump 210, the crankshaft cavity 209, the crankshaft connecting rod 202 and the shell 203 to each other.

[0038] A fixed-displacement plunger pump is selected, and the flow rate of compressed gas at its outlet is proportional to the rotation speed of the plunger pump.

[0039] The crankshaft connecting rod 202 is composed of a crankshaft and two connecting rods. The two connecting rods are respectively connected to the pistons of two plunger pumps 210 to drive the pistons to perform reciprocating motion to inhale and compress gas.

[0040] The plunger pump gas inlet 212 and the plunger pump gas outlet 205 on the housing 203 are respectively connected to the air inlet pipe 213 and the air outlet conduit 208 inside the housing 203, and are used for the air inlet and air outlet of the two plunger pumps 210. The inlets of the two plunger pumps 210 are connected to the same air inlet conduit 213, and the outlets of the two plunger pumps are connected to the same air outlet conduit 208. A one-way valve 207 is installed on the air inlet conduit 213 and the air outlet conduit 208 to maintain the one-way nature of the air inlet and air outlet of the plunger pump 210.

[0041] The cavity gas outlet 211 is connected to the plunger pump gas inlet 212 to ensure that the gas pressure inside the shell 203 is equal to the gas pressure of the plunger pump gas inlet 212, thereby reducing the pressure difference between the inside and outside of the plunger pump 210, reducing the pressure resistance of the plunger pump 210, reducing the leakage rate of the plunger pump 210, and increasing the flow rate of the plunger pump 210.

[0042] The outer surface of the shell 203 is designed in the form of fins. Under the premise that the plunger pump 210 is in good contact with the shell 203, the heat generated by the plunger pump 210 during operation can be conducted to the shell 203 and finally dissipated into the surrounding atmosphere through the fins on the outer surface of the shell 203.

[0043] A pressure sensor 206 is installed at the plunger pump gas outlet 205 and the plunger pump gas inlet 212 respectively, for detecting the gas pressure at the inlet and outlet of the plunger pump 210.

[0044] The motor 105 is fixed on the bottom plate 303 using two motor brackets 301, and the housing 203 is fixed on the bottom plate 303 using four circulating pump cavity fixing members 304 around the housing 203, so as to avoid relative movement between the motor 105 and the housing 203 during operation. The coupling 302 is used to concentrically connect the rotating shaft of the motor 105 with the circulating pump shaft 201, so that the motor 105 drives the circulating pump rotating shaft 201 to rotate.

[0045] The selected coupling can collect the current speed and torque signals of the motor 105 and display them through the host computer.

[0046] The crankshaft connecting rod 202 passes through the middle of the housing 203 and is connected to the circulation pump shaft 201 through the dynamic sealing structure 214. The rotation of the circulation pump shaft 201 drives the rotation of the crankshaft connecting rod 202. In order to achieve the sealing inside the housing 203, the dynamic sealing structure 214 is connected to the circulation pump shaft 201 by a packing seal, and the dynamic sealing structure 214 is also connected to the housing 203 by a packing seal.

[0047] The two plunger pumps 210 are arranged in parallel along the axial direction of the crankshaft connecting rod 202 inside the housing 203 and are in good contact with the bottom of the housing 203. The two plunger pumps 210 are driven by the crankshaft connecting rod 202, and the crankshaft connecting rod 202 is installed inside the crankshaft cavity 209. On the one hand, the crankshaft cavity 209 is connected to the two plunger pumps 210 to fix their positions, thereby ensuring that the two are in good contact and do not shift during the process of the crankshaft connecting rod 202 driving the plunger pump 210. On the other hand, it is fixed to the housing 203 to achieve the purpose of fixing the plunger pump 210, the crankshaft cavity 209, the crankshaft connecting rod 202 and the housing 203 to each other.

[0048] A fixed-displacement plunger pump is selected, and the flow rate of compressed gas at its outlet is proportional to the rotation speed of the plunger pump.

[0049] The crankshaft connecting rod 202 is composed of a crankshaft and two connecting rods. The two connecting rods are respectively connected to the pistons of two plunger pumps 210 to drive the pistons to perform reciprocating motion to inhale and compress gas.

[0050] The plunger pump gas inlet 212 and the plunger pump gas outlet 205 on the housing 203 are respectively connected to the air inlet pipe 213 and the air outlet conduit 208 inside the housing 203, and are used for the air inlet and air outlet of the two plunger pumps 210. The inlets of the two plunger pumps 210 are connected to the same air inlet conduit 213, and the outlets of the two plunger pumps are connected to the same air outlet conduit 208. A one-way valve 207 is installed on the air inlet conduit 213 and the air outlet conduit 208 to maintain the one-way nature of the air inlet and air outlet of the plunger pump 210.

[0051] The cavity gas outlet 211 is connected to the plunger pump gas inlet 212 to ensure that the gas pressure inside the shell 203 is equal to the gas pressure of the plunger pump gas inlet 212, thereby reducing the pressure difference between the inside and outside of the plunger pump 210, reducing the pressure resistance of the plunger pump 210, reducing the leakage rate of the plunger pump 210, and increasing the flow rate of the plunger pump 210.

[0052] The outer surface of the shell 203 is designed in the form of fins. Under the premise that the plunger pump 210 is in good contact with the shell 203, the heat generated by the plunger pump 210 during operation can be conducted to the shell 203 and finally dissipated into the surrounding atmosphere through the fins 2034 on the outer surface of the shell 203.

[0053] A pressure sensor 206 is installed at the plunger pump gas outlet 205 and the plunger pump gas inlet 212 respectively, for detecting the gas pressure at the inlet and outlet of the plunger pump 210 .

[0054] The motor 105 is fixed on the bottom plate 303 using two motor brackets 301, and the housing 203 is fixed on the bottom plate 303 using four circulating pump cavity fixing members 304 around the housing 203, so as to avoid relative movement between the motor 105 and the housing 203 during operation. The coupling 302 is used to concentrically connect the rotating shaft of the motor 105 with the circulating pump shaft 201, so that the motor 105 drives the circulating pump rotating shaft 201 to rotate.

[0055] The selected coupling can collect the current speed and torque signals of the motor 105 and display them through the host computer.

[0056] The advantages of the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention are as follows:

[0057] 1) The plunger pump is the core component of the gas booster pump to achieve gas compression and pressure boosting. Compared with the traditional gas booster pump in which the plunger pump is at normal pressure and is subjected to a large internal and external pressure difference, the present invention places the plunger pump inside a closed shell, and the shell is filled with gas equal to the inlet pressure of the plunger pump, thereby reducing the pressure difference between the inside and outside of the plunger pump and improving the pressure resistance of the gas booster pump;

[0058] 2) Since the internal and external pressure difference of the core component plunger pump is greatly reduced, the gas flow rate of the leak is less, so the miniaturized gas booster pump with high pressure resistance and large flow rate of the present invention is more capable of driving a larger gas flow rate;

[0059] 3) Since the internal and external pressure difference of the core component plunger pump is greatly reduced, under the condition of driving the same pressure and flow gas, a plunger pump with less material, lower pressure resistance and smaller input power will be adopted. Therefore, compared with the traditional gas circulation pump, the high-pressure and large-flow miniaturized gas booster pump of the present invention has the characteristics of small size, light weight and low power consumption.

[0060] The motor 105 is an AC motor, and the speed of the motor is adjusted by the frequency converter 102. The power supply adopts 380V three-phase AC. The switch 101 is a three-phase switch, and its power needs to be greater than the maximum power of the motor 105. The wire 103 adopts a three-phase cable, and the cable diameter should be selected according to the maximum current flowing through the cable.

[0061] In order to achieve sealing inside the housing 203, the dynamic sealing structure 214 and the circulation pump shaft 201 are connected by multiple sets of polytetrafluoroethylene soft packings, and the dynamic sealing structure 214 and the housing 203 are also connected by multiple sets of polytetrafluoroethylene soft packings.

[0062] Two plunger pumps 210 are arranged in parallel along the axial direction of the crankshaft connecting rod 202 inside the housing 203 and in good contact with the bottom of the housing 203. The two plunger pumps 210 are driven by the crankshaft connecting rod 202, and the crankshaft connecting rod 202 is installed inside the crankshaft cavity 209. The crankshaft cavity 209 is connected to the two plunger pumps 210 on the one hand to fix their positions, thereby ensuring that the two are in good contact and do not shift during the process of the crankshaft connecting rod 202 driving the plunger pump 210. On the other hand, it is fixed to the housing 203 to achieve the purpose of fixing the plunger pump 210, the crankshaft cavity 209, the crankshaft connecting rod 202 and the housing 203 to each other. The crankshaft cavity 209, the plunger pump 210 and the housing 203 are all fixed by screws.

[0063] The plunger pump 210 is a fixed displacement plunger pump, and the flow rate of the compressed gas at its outlet is proportional to the rotation speed of the plunger pump. The displacement of the plunger pump is selected according to the maximum gas flow rate driven by it and the maximum rotation speed of the gas.

[0064] The crankshaft connecting rod 202 is composed of a crankshaft and two connecting rods, and the two connecting rods are respectively connected to the pistons of two plunger pumps 210 to drive the pistons to reciprocate to inhale and compress gas. The crankshaft connecting rod needs to match the pistons in the plunger pump.

[0065] The plunger pump gas inlet 212 and the plunger pump gas outlet 205 on the housing 203 are respectively connected to the air inlet pipe 213 and the air outlet conduit 208 inside the housing 203, and are used for the air inlet and air outlet of the two plunger pumps 210. The inlets of the two plunger pumps 210 are connected to the same air inlet conduit 213, and the outlets of the two plunger pumps are connected to the same air outlet conduit 208. A one-way valve 207 is installed on the air inlet conduit 213 and the air outlet conduit 208 to maintain the one-way nature of the air inlet and air outlet of the plunger pump 210.

[0066] The cavity gas outlet 211 is connected to the plunger pump gas inlet 212 to ensure that the gas pressure inside the shell 203 is equal to the gas pressure of the plunger pump gas inlet 212, thereby reducing the pressure difference between the inside and outside of the plunger pump 210, reducing the pressure resistance of the plunger pump 210, reducing the leakage rate of the plunger pump 210, and increasing the flow rate of the plunger pump 210.

[0067] The shell is composed of a cover plate 2031, screws 2032 and a bottom cavity 2033. The cover plate 2031 is surrounded by a circle of through holes, and the bottom cavity 2033 has a corresponding blind hole. The cover plate is placed on the bottom cavity 2033. The screws 2032 are inserted into the through holes of the cover plate 2031 and screwed into the corresponding blind holes on the top of the bottom cavity 2033 to achieve the sealing of the shell 203. The thickness d of the cover plate 2031 and the bottom cavity 2033 should meet the pressure resistance requirements of the shell.

[0068] The outer surface of the housing 203 is designed in the form of fins. Under the premise that the plunger pump 210 is in good contact with the housing 203, the heat generated by the plunger pump 210 during operation can be conducted to the housing 203 and finally dissipated to the surrounding atmosphere through the fins on the outer surface of the housing 203. The material of the housing 203 is selected from aluminum alloy to facilitate heat dissipation.

[0069] A pressure sensor 206 is installed at the plunger pump gas outlet 205 and the plunger pump gas inlet 212 respectively to detect the gas pressure at the inlet and outlet of the plunger pump 210. The pressure measuring range of the pressure sensor 206 needs to match the working pressure of the circulating pump.

[0070] Two motor brackets 301 are used to fix the motor 105 on the base plate 303, and four circulating pump cavity fixing members 304 are used around the shell 203 to fix the shell 203 on the base plate 303, so as to avoid relative movement between the motor 105 and the shell 203 during operation. The coupling 302 is used to concentrically connect the rotating shaft of the motor 105 with the circulating pump shaft 201, so that the motor 105 drives the circulating pump rotating shaft 201 to rotate. The selection of the coupling 302 needs to match the diameter of the rotating shaft of the motor 105 and the circulating pump shaft 201.

[0071] The working mode of the miniaturized gas booster pump capable of withstanding high pressure and large flow rate of the present invention is as follows:

[0072] 1. Pass the gas into the shell from the cavity gas inlet 204 and gradually increase the pressure to the working pressure;

[0073] 2. Close the switch 101, start the frequency converter 102, use a lower frequency, and let the motor 105 rotate gradually. Pay attention to the rotation direction of the motor 105 at this time. Do not allow the motor 105 to reverse when driving the plunger pump 210. If it is found that the motor 105 reverses, it is necessary to change the phase sequence in time.

[0074] 3. After the motor 105 starts smoothly, the speed of the motor 105 is adjusted by adjusting the output of the frequency converter 102 according to the flow output requirement of the plunger pump 210 to match the gas flow output by the plunger pump 210;

[0075] 4. After the gas circulation pump finishes working, turn off the inverter 102 and the switch 101 in sequence.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A miniaturized gas booster pump capable of withstanding high pressure and large flow, characterized in that: The invention comprises an electrical system (1) and a circulation pump cavity (2), wherein the electrical system (1) and the circulation pump cavity (2) are connected together via a connecting component (3), wherein the circulation pump cavity (2) comprises a housing (203), wherein a plunger pump (210) is arranged in the housing (203), wherein a cavity gas inlet (204) and a cavity gas outlet (211) are arranged on the housing (203), wherein the plunger pump gas outlet (205) extends out of the housing, and wherein the cavity gas outlet (211) is connected to the plunger pump gas inlet (212), so that the input gas pressure of the plunger pump is equal to the internal gas pressure of the housing (203); The electrical system (1) comprises: an electric motor (105); The circulation pump chamber (2) further comprises: a circulation pump shaft (201); The connecting component (3) comprises a coupling (302), wherein the coupling (302) connects the rotating shaft of the motor (105) and the circulating pump shaft (201) concentrically, so that the motor (105) drives the rotating shaft (201) of the circulating pump to rotate; The coupling (302) collects the current speed and torque signals of the motor (105) and displays them through the host computer; The circulation pump cavity (2) further comprises: a crankshaft connecting rod (202), a one-way valve (207), an air outlet conduit (208), a crankshaft cavity (209), an air inlet conduit (213), and a dynamic sealing structure (214); the other end of the circulation pump shaft (201) is connected to the crankshaft connecting rod (202); the crankshaft cavity (209) is arranged in the housing; the crankshaft connecting rod (202) is arranged in the crankshaft cavity (209); there are two plunger pumps (210); the crankshaft connecting rod (202) is respectively connected to the pistons of the two plunger pumps (210); the plunger pump gas inlet (212) is connected to the air inlets of the two plunger pumps (210) through the air inlet conduit (213); and the plunger pump gas outlet (205) is connected to the air outlets of the two plunger pumps (210) through the air outlet conduit (208); A one-way valve (207) is installed on the air inlet conduit (213) and the air outlet conduit (208) respectively to maintain the one-way nature of air inlet and air outlet of the plunger pump (210); The outer surface of the housing (203) is designed in the form of fins, so that the heat generated by the plunger pump (210) during operation can be dissipated into the surrounding atmosphere through the fins of the housing (203).

2. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate according to claim 1, characterized in that: Pressure sensors (206) are respectively provided at the plunger pump gas outlet (205) and the plunger pump gas inlet (212).

3. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate according to claim 2, characterized in that: The electrical system (1) comprises a switch (101), a frequency converter (102), an electric wire (103), and a connector (104) which are connected in sequence, and the motor (105) is connected to the connector (104).

4. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate according to claim 3, characterized in that: The connecting component (3) further comprises: a motor bracket (301), a base plate (303) and a circulating pump cavity fixing member (304); the motor bracket (301) and the circulating pump cavity fixing member (304) are both arranged on the base plate (303); the motor bracket (301) is used to support the motor (105); and the circulating pump cavity fixing member (304) is used to support the housing.

5. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate according to claim 4, characterized in that: The motor (105) is an AC motor, and the speed of the motor is adjusted by a frequency converter (102). The crankshaft connecting rod (202) passes through a housing (203) and is connected to a circulation pump shaft (201) via a dynamic sealing structure (214). The rotation of the circulation pump shaft (201) drives the rotation of the crankshaft connecting rod (202). The dynamic sealing structure (214) and the circulation pump shaft (201) are connected by a packing seal, and the dynamic sealing structure (214) and the housing (203) are also connected by a packing seal.

6. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate according to claim 5, characterized in that: The two plunger pumps (210) are arranged in parallel along the axial direction of the crankshaft connecting rod (202) inside the housing (203) and are in contact with the bottom of the housing (203).

7. The miniaturized gas booster pump capable of withstanding high pressure and large flow rate according to claim 6, characterized in that: The plunger pump is a fixed-displacement plunger pump, and the flow rate of compressed gas at its outlet is proportional to the speed of the plunger pump.

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