Suction and production high-frequency pump

Abstract

The invention discloses a suction and extraction high-frequency pump which comprises a pump body, a driving device, a transmission mechanism and at least one continuous suction and extraction unit arranged in the pump body, each continuous suction and extraction unit comprises two suction and extraction assemblies, and the driving device is in linkage connection with the continuous suction and extraction units through the transmission mechanism, so that when one suction and extraction assembly sucks and extracts a medium, the continuous suction and extraction units are in linkage connection through the transmission mechanism. And when one of the suction and extraction assemblies discharges the medium, the other suction and extraction assembly sucks and extracts the medium. The device is simple and reliable in structure, efficient and continuous conveying of gas, solid and liquid mixtures can be achieved, and the device can be used for sucking and extracting and can also be used for reinjection.

Description

Technical Field

[0001] The invention relates to the technical field of medium conveying devices, in particular to a high-frequency suction pump. Background Art

[0002] In oil production, the oil well output is often accompanied by a certain amount of natural gas, water and solid particles. In order to reduce wellhead back pressure, increase crude oil production, improve development economic benefits and achieve the purpose of closed oil and gas transportation, oil and gas mixed transportation technology is increasingly widely used in oil and gas development.

[0003] Oil and gas mixed transportation technology is a new technology that mixes and pressurizes crude oil output and directly transports it to the joint station. Compared with traditional oil production technology, it can save one gas pipeline and reduce the oil and gas separation equipment. For offshore oil fields, the platform area can be reduced. Oil and gas mixed transportation technology can not only make full use of energy, but also improve environmental conditions. Its economic and social benefits are very considerable.

[0004] The invention patent with application number CN202023351253.3 discloses a multiphase flow mixed delivery device, which includes a first tank body, a second tank body and a reversing mechanism. The reversing mechanism drives the liquid in the first tank body and the second tank body to circulate back and forth, so that the first tank body and the second tank body alternately form a vacuum suction chamber and / or a compression discharge chamber to achieve continuous delivery of liquid, gas or a gas-liquid mixture. In actual use, the structure has the following defects: (1) First, the reversing mechanism drives the liquid in the first tank body and the second tank body to circulate back and forth, which is not only complex in structure, but also vacuum suction and compression discharge cannot be carried out at the same time, and the efficiency is low; (2) It is only suitable for the delivery of liquid, gas or a gas-liquid mixture, and is not suitable for the mixed delivery of gas, solid and liquid.

[0005] Therefore, it is very necessary to develop a high-frequency suction pump that can realize continuous transportation of gas, solid and liquid mixture. Summary of the invention

[0006] The object of the present invention is to provide a high-frequency suction pump, which is not only simple and reliable in structure, but also can realize efficient and continuous transportation of gas, solid and liquid mixture, and can be used for suction and recovery.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-frequency suction pump, comprising a pump body, a driving device, a transmission mechanism and at least one group of continuous suction units arranged in the pump body, wherein the continuous suction unit comprises two groups of suction components, and the driving device is linked to the continuous suction unit through the transmission mechanism, so that when one group of suction components sucks the medium, the other group of suction components discharges the medium, and when one group of suction components discharges the medium, the other group of suction components sucks the medium.

[0008] By adopting the above technical solution, continuous and uninterrupted suction operation can be achieved during suction operation, that is, the medium can be discharged while suction is being performed, which significantly improves the medium transportation efficiency. The medium can be suctioned or re-injected.

[0009] The present invention is further configured as follows: the suction assembly includes a cylinder body, a piston, a suction valve ear, a discharge valve ear and an output pipe; a transmission chamber and a medium chamber are separated in the pump body by a partition, an inlet and a plurality of outlets are provided on the surface of the pump body, the cylinder body is installed on a side of the partition corresponding to the transmission chamber, the piston is movably arranged in the cylinder body, and a piston rod connected to the transmission mechanism is provided on the piston, the output pipe is installed on a side of the partition corresponding to the medium chamber and is connected to the corresponding outlet, a suction port connecting the medium chamber with the inside of the cylinder body and a discharge port connecting the cylinder body with the output pipe are provided on the partition, and the suction valve ear and the discharge valve ear are respectively installed on the suction port and the discharge port; when the piston moves in a direction away from the partition, the suction valve ear opens the suction port and the discharge valve ear closes the discharge port, and when the piston moves in a direction close to the partition, the suction valve ear closes the suction port and the discharge valve ear opens the discharge port.

[0010] By adopting the above technical solution, a piston structure is used to realize multiphase flow, that is, efficient and continuous transportation of gas, solid and liquid mixtures, overcoming the extreme requirements of gas, solid and liquid mixtures on pumps and valves.

[0011] The present invention is further configured such that the suction valve ear includes a suction valve stem matched with a transmission mechanism, a suction valve flap arranged on the suction valve stem, and a first elastic member for driving the suction valve stem and the suction valve flap to reset; the discharge valve ear includes a discharge valve stem matched with a transmission mechanism, a discharge valve flap arranged on the discharge valve stem, and a second elastic member for driving the discharge valve stem and the discharge valve flap to reset.

[0012] By adopting the above technical solution, the suction valve ear and the discharge valve stem cooperate with the piston structure to open and close, thereby realizing the suction and discharge of the medium, and the structure is stable and reliable.

[0013] The present invention is further configured as follows: the transmission mechanism includes a driving crankshaft and a driven crankshaft, the driving crankshaft and the driven crankshaft are rotatably arranged on the pump body, and the driving crankshaft and the driven crankshaft are linked by a transmission member, the driving device is linked to the driving crankshaft for driving the driving crankshaft to rotate, the driving crankshaft is axially provided with a plurality of main shaft cams, and the directions of each adjacent two main shaft cams are opposite, the main shaft cams are connected to the corresponding piston rods for pushing and pulling the piston for axial displacement along the cylinder body, the driven crankshaft is axially provided with a plurality of slave shaft cams, and the directions of each adjacent two slave shaft cams are opposite, and the suction valve stem and the discharge valve stem are respectively matched with the two adjacent slave shaft cams.

[0014] By adopting the above technical solution, the driving crankshaft and the driven crankshaft are connected through a transmission member, that is, when the driving device drives the driving crankshaft to rotate, the driven crankshaft rotates at the same time, realizing the movement of the piston, and the corresponding suction valve ears and discharge valve ears perform opening and closing actions. Only one driving device is needed to realize the linkage of multiple structures, which not only has lower costs but also better structural stability.

[0015] The present invention is further configured such that the transmission member is a gear transmission assembly, a chain transmission assembly, or a belt transmission assembly.

[0016] By adopting the above technical solution, which is a variety of settings of the transmission parts, the linkage of the driving crankshaft and the driven crankshaft can be achieved.

[0017] The present invention is further configured such that a sealing ring is provided on the outer circumferential surface of the piston for forming a sealing fit with the inner circumferential surface of the cylinder body.

[0018] By adopting the above technical solution, the sealing between the two can be achieved to prevent the medium from leaking from the gap between the two.

[0019] The present invention is further configured such that the driving device adopts a variable frequency motor.

[0020] By adopting the above technical solution, the variable frequency motor can adjust the speed according to the working conditions, and increase the pressure at high frequency to achieve the pressure delivery flow and safety requirements.

[0021] The present invention is further configured such that a first check valve that only allows the medium to enter the pump body is provided at the inlet of the pump body, and a second check valve that only allows the medium to discharge from the pump body is provided at the outlet of the pump body.

[0022] By adopting the above technical solution, the first check valve and the second check valve not only prevent backflow, but also have the effects of reducing noise and breaking tail flow.

[0023] The present invention is further configured such that a lubricating oil groove for conveying lubricating oil to each lubricating point is provided in the pump body.

[0024] By adopting the above technical solution, the lubricating oil is delivered to each lubrication point through the oil pump, so that each transmission component in the pump body can be accurately lubricated, reducing the wear of components and improving the overall service life.

[0025] The present invention is further configured such that the plurality of continuous suction units are all arranged on the same side of the driving crankshaft and are evenly distributed along the axial direction of the driving crankshaft.

[0026] By adopting the above technical solution, which is the first setting method of the continuous suction unit, it has the advantage of efficient transmission.

[0027] The present invention is further configured such that a plurality of continuous suction units are arranged on both sides of the active crankshaft, and the continuous suction units on both sides are evenly distributed along the axial direction of the active crankshaft.

[0028] By adopting the above technical solution, which is the second setting method of the continuous suction unit, the mixing efficiency can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the continuous suction unit of the present invention.

[0030] In the figure: 4. Pump body; 5. Driving device; 7. Transmission mechanism; 8. Continuous suction unit; 13. Inlet; 14. Outlet; 17. Suction assembly; 18. Cylinder; 19. Piston; 20. Suction valve ear; 21. Discharge valve ear; 22. Output pipe; 23. Partition; 24. Transmission chamber; 25. Medium chamber; 26. Piston rod; 27. Suction port; 28. Discharge port; 29. ​​Suction valve stem; 30. Suction valve flap; 31. First elastic member; 32. Discharge valve stem; 33. Discharge valve flap; 34. Second elastic member; 35. Active crankshaft; 36. Driven crankshaft; 37. Transmission member; 38. Main shaft cam; 39. Slave shaft cam; 40. First check valve; 41. Second check valve; 42. Lubricating oil tank. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example: As attached Figure 1 and attached Figure 2 The high-frequency suction pump shown includes a pump body 4, a driving device 5, a transmission mechanism 7, and at least one group of continuous suction units 8 arranged in the pump body 4. The continuous suction unit 8 includes two groups of suction components 17. The driving device 5 is linked to the continuous suction unit 8 through the transmission mechanism 7, so that when one group of suction components 17 sucks the medium, the other group of suction components 17 discharges the medium, and when one group of suction components 17 discharges the medium, the other group of suction components 17 sucks the medium. When performing suction operations, continuous and uninterrupted suction operations can be achieved, that is, the medium is discharged while suctioning, which significantly improves the medium transportation efficiency. It can be sucked and re-injected.

[0033] As attached Figure 1and attached Figure 2 As shown, the suction assembly 17 includes a cylinder 18, a piston 19, a suction valve ear 20, a discharge valve ear 21 and an output pipe 22; the pump body 4 is separated into a transmission chamber 24 and a medium chamber 25 by a partition 23, and the surface of the pump body 4 is provided with an inlet 13 and a plurality of outlets 14 connected to the medium chamber 25, the cylinder 18 is installed on the side of the partition 23 corresponding to the transmission chamber 24, and the internal space of the cylinder 18 is separated from the medium chamber 25, the piston 19 is movably arranged in the cylinder 18, and the piston 19 is provided with a piston rod 26 connected to the transmission mechanism 7, and the output pipe 22 is installed on the partition 23 corresponding to the medium chamber 24. One side of the medium cavity 25 is connected to the corresponding outlet 14, and the partition 23 is provided with a suction port 27 connecting the medium cavity 25 with the inside of the cylinder 18 and a discharge port 28 connecting the cylinder 18 with the output pipe 22, and the suction valve ear 20 and the discharge valve ear 21 are respectively installed on the suction port 27 and the discharge port 28; when the piston 19 moves in the direction away from the partition 23, the suction valve ear 20 opens the suction port 27 and the discharge valve ear 21 closes the discharge port 28, and when the piston 19 moves in the direction close to the partition 23, the suction valve ear 20 closes the suction port 27 and the discharge valve ear 21 opens the discharge port 28. The piston 19 structure is used to realize multiphase flow, that is, efficient and continuous transportation of gas, solid and liquid mixtures, which overcomes the extreme requirements of gas, solid and liquid mixtures on pumps and valves.

[0034] As attached Figure 1 and attached Figure 2 As shown, the suction valve ear 20 includes a suction valve stem 29 matched with the transmission mechanism 7, a suction valve disc 30 arranged on the suction valve stem 29, and a first elastic member 31 for driving the suction valve stem 29 and the suction valve disc 30 to reset; the discharge valve ear 21 includes a discharge valve stem 32 matched with the transmission mechanism 7, a discharge valve disc 33 arranged on the discharge valve stem 32, and a second elastic member 34 for driving the discharge valve stem 32 and the discharge valve disc 33 to reset, wherein the suction valve disc 30 and the discharge valve disc 33 both have a first conical sealing surface, the suction port 27 and the discharge port 28 both have a second conical sealing surface, the first elastic member 31 and the second elastic member 34 can be springs, one end of the first elastic member 31 is relatively fixed and can be fixedly connected to the cylinder body 18, and the other end is fixedly connected to the suction valve disc 30 or the suction valve stem 29, and the second elastic member 34 is the same. The suction valve ear 20 and the discharge valve stem 32 cooperate with the piston 19 structure to open and close, thereby realizing the suction and discharge of the medium, and the structure is stable and reliable.

[0035] As attached Figure 1 and attached Figure 2As shown, the transmission mechanism 7 includes a driving crankshaft 35 and a driven crankshaft 36, which are rotatably arranged on the pump body 4, and the driving crankshaft 35 and the driven crankshaft 36 are linked by a transmission member 37. The driving device 5 is linked with the driving crankshaft 35 to drive the driving crankshaft 35 to rotate. The driving crankshaft 35 is axially provided with a plurality of main shaft cams 38, and the directions of each adjacent two main shaft cams 38 are opposite. In this embodiment, they are arranged on the left and right. The main shaft cams 38 are connected to the corresponding piston rod 26 to push and pull the piston 19 for axial displacement along the cylinder body 18. The driven crankshaft 36 is axially provided with a plurality of slave shaft cams 39, and the directions of each adjacent two slave shaft cams 39 are opposite. In this embodiment, they are arranged on the left and right. The suction valve stem 29 and the discharge valve stem 32 are respectively matched with the two adjacent slave shaft cams 39. The driving crankshaft 35 and the driven crankshaft 36 are connected by a transmission member 37, that is, when the driving crankshaft 35 is driven by the driving device 5 to rotate, the driven crankshaft 36 rotates at the same time, so that the corresponding suction valve ear 20 and the discharge valve ear 21 are opened and closed while the piston 19 moves. Only one driving device 5 is needed to realize the linkage of multiple structures, which not only has lower costs but also better structural stability.

[0036] More specifically, the transmission member 37 is a gear transmission assembly, a chain transmission assembly, or a belt transmission assembly. (1) The gear transmission assembly includes a driving gear disposed on the driving crankshaft 35 and a driven gear disposed on the driven crankshaft 36, and the driving gear and the driven gear are meshed with each other. (2) The chain transmission assembly includes a driving sprocket disposed on the driving crankshaft 35 and a driven sprocket disposed on the driven crankshaft 36, and a chain is meshed and connected on the driving linkage and the driven sprocket. (3) The belt transmission assembly includes a driving pulley disposed on the driving crankshaft 35 and a driven pulley disposed on the driven crankshaft 36, and a belt is coated on the driving pulley and the driven pulley. These are multiple settings of the transmission member 37, which can realize the linkage of the driving crankshaft 35 and the driven crankshaft 36.

[0037] The outer circumferential surface of the piston 19 is provided with a sealing ring for sealing with the inner circumferential surface of the cylinder body 18. The sealing between the two can be achieved to prevent the medium from leaking from the gap between the two.

[0038] The drive device 5 adopts a variable frequency motor, which can adjust the speed according to the working conditions, and realize the pressure increase at high frequency, so as to achieve the pressure delivery flow and safety requirements.

[0039] As attached Figure 1As shown, a first check valve 40 is provided at the inlet 13 of the pump body 4, which only allows the medium to enter the pump body 4, and a second check valve 41 is provided at the outlet 14 of the pump body 4, which only allows the medium to be discharged from the outside of the pump body 4. The first check valve 40 and the second check valve 41 not only prevent backflow, but also have the effects of reducing noise and breaking tail flow.

[0040] As attached Figure 1 As shown, a lubricating oil groove 42 for delivering lubricating oil to each lubricating point is provided in the pump body 4. By delivering lubricating oil to each lubricating point through the oil pump, each transmission component in the pump body 4 can be accurately lubricated, reducing component wear and extending the overall service life.

[0041] As an extended solution, multiple continuous suction units 8 are all arranged on the same side of the active crankshaft 35 and are evenly distributed along the axial direction of the active crankshaft 35. This is the first arrangement of the continuous suction units 8, which has the advantage of efficient transmission.

[0042] As a further expansion scheme, multiple continuous suction units 8 are arranged on both sides of the active crankshaft 35, and the continuous suction units 8 on both sides are evenly distributed along the axial direction of the active crankshaft 35. In this scheme, the corresponding piston rods 26 on both sides can share a rod or two separate rods, and in this scheme, one active crankshaft 35 drives and two driven crankshafts 36 transmit. This is the second setting mode of the continuous suction unit 8, which can further improve the mixed transmission efficiency.

[0043] Working principle: During the suction operation, the active crankshaft 35 is driven by the variable frequency motor to rotate, and the active crankshaft 35 drives the driven crankshaft 36 to rotate through the transmission member 37. The main shaft cam 38 on the active crankshaft 35 cooperates with the corresponding piston rod 26, and the driven crankshaft 36 cooperates with the corresponding suction valve ear 20 or the discharge valve ear 21. Taking a group of continuous suction units 8 as an example, the piston 19 of one group of suction components 17 is pulled by the piston rod 26 of the active crankshaft 35, so that the internal space of the cylinder body 18 generates negative pressure. At the same time, the suction valve ear 20 corresponding to the piston 19 structure opens the suction port 27 under the action of the corresponding slave shaft cam 39 on the driven crankshaft 36, and the discharge valve ear 21 corresponding to the piston 19 structure is opened. 1 The discharge port 28 is closed under the action of the second elastic member 34. At this time, the suction assembly 17 performs the suction process. Then, the piston 19 of the suction assembly 17 is pushed by the piston rod 26 of the active crankshaft 35 to compress the internal space of the cylinder 18. At the same time, the suction valve ear 20 corresponding to the piston 19 structure closes the suction port 27 under the action of the first elastic member 31, and the discharge valve ear 21 corresponding to the piston 19 structure opens the discharge port 28 under the action of the corresponding slave cam 39 on the driven crankshaft 36, realizing a suction-one-discharge action; while an adjacent group of suction assemblies 17 performs the opposite work, that is, a discharge-one-suction action, thereby realizing efficient and continuous transportation of gas, solid and liquid mixtures. Similarly, multiple groups of continuous suction units 8 can be set as needed to further improve the mixed transportation efficiency. In addition, by switching the first check valve 40 and the second check valve 41, suction and re-injection can be performed.

[0044] The high-frequency suction pump can be used in the following fields: 1. Oil and gas industry - In oil or gas extraction, "suction high-frequency pump" can refer to a system used to extract underground oil and gas resources and transport the oil and gas mixture to processing facilities. This system is often used in complex oil and gas field development, especially in the case of multiphase flow (oil, gas, water and sand mixture) with the advantage of safe mixed transportation.

[0045] 2. Medical field - In medical equipment, "suction and collection high-frequency pump" can refer to a device used to suck body fluids (such as sputum or blood), collect samples and mix and transport them. For example, some medical equipment can perform sputum suction and infusion operations at the same time, and produce mixed infusion media in the pharmaceutical process.

[0046] 3. Chemical or industrial fields - In chemical or industrial production, this system may be used to absorb raw materials, harvest and mix multiple substances and then transport them to the next production link.

[0047] For example, in liquid mixing or reaction processes, different components may need to be mixed and delivered in a certain proportion.

[0048] Such as used as a delivery pump for various acid, alkali, salt solutions, resins, pigments, inks, paints, glycerin, and paraffin; Oil refinery: used for transporting various heating oils, asphalt oil, tar, latex, asphalt and for loading and unloading various oil products in oil transport, oil pool and oil tank trucks.

[0049] 4. Environmental protection or sewage treatment - In the field of environmental protection, the "suction high-frequency pump" can be used to suck sewage or sludge, collect samples and mix and transport them for further treatment or analysis.

[0050] Core features: (1) Suction sampling: sucking liquid, gas or solid particles and collecting samples.

[0051] (2) Mixed transport: Mix multiple substances and transport them to a designated location.

[0052] 5. Shipbuilding: used as ship loading pump, sweeping pump, ship ballast pump, main engine lubricating oil pump, fuel delivery pump, fuel injection pump, cargo oil pump, etc. v Thermal power plant: used as heavy oil and crude oil delivery pump, heavy oil fuel pump, etc.

[0053] 6. Food: used in wineries, food factories, sugar factories, canning factories, to transport alcohol, honey, sugar juice, toothpaste, milk, cream, soy sauce, vegetable oil, animal oil, etc.

Claims

1. Suction high frequency pump, characterized by: The invention comprises a pump body (4), a driving device (5), a transmission mechanism (7), and at least one group of continuous suction units (8) arranged in the pump body (4); the continuous suction unit (8) comprises two groups of suction components (17); the driving device (5) is linked to the continuous suction unit (8) through the transmission mechanism (7), so that when one group of suction components (17) sucks a medium, the other group of suction components (17) discharges the medium; and when one group of suction components (17) discharges the medium, the other group of suction components (17) sucks the medium.

2. The high-frequency suction pump according to claim 1, characterized in that: The suction assembly (17) comprises a cylinder body (18), a piston (19), a suction valve ear (20), a discharge valve ear (21) and an output pipe (22); a transmission chamber (24) and a medium chamber (25) are separated in the pump body (4) by a partition (23); an inlet (13) and a plurality of outlets (14) are provided on the surface of the pump body (4); the cylinder body (18) is mounted on a side of the partition (23) corresponding to the transmission chamber (24); the piston (19) is movably arranged in the cylinder body (18); and a piston rod (26) connected to the transmission mechanism (7) is provided on the piston (19); the output pipe (22) is mounted on a side of the partition (23) corresponding to the medium chamber (25) and is connected to the medium chamber (25) on the opposite side. The partition (23) is provided with a suction port (27) for connecting the medium cavity (25) with the interior of the cylinder body (18) and a discharge port (28) for connecting the cylinder body (18) with the output pipe (22). The suction valve ear (20) and the discharge valve ear (21) are respectively mounted on the suction port (27) and the discharge port (28). When the piston (19) moves in a direction away from the partition (23), the suction valve ear (20) opens the suction port (27) and the discharge valve ear (21) closes the discharge port (28); when the piston (19) moves in a direction close to the partition (23), the suction valve ear (20) closes the suction port (27) and the discharge valve ear (21) opens the discharge port (28).

3. The high-frequency suction pump according to claim 2, characterized in that: The suction valve ear (20) comprises a suction valve stem (29) matched with the transmission mechanism (7), a suction valve flap (30) arranged on the suction valve stem (29), and a first elastic member (31) used for driving the suction valve stem (29) and the suction valve flap (30) to return to their original position; the discharge valve ear (21) comprises a discharge valve stem (32) matched with the transmission mechanism (7), a discharge valve flap (33) arranged on the discharge valve stem (32), and a second elastic member (34) used for driving the discharge valve stem (32) and the discharge valve flap (33) to return to their original position.

4. The high-frequency suction pump according to claim 3, characterized in that: The transmission mechanism (7) comprises a driving crankshaft (35) and a driven crankshaft (36). The driving crankshaft (35) and the driven crankshaft (36) are rotatably arranged on the pump body (4), and the driving crankshaft (35) and the driven crankshaft (36) are linked by a transmission member (37). The driving device (5) is linked with the driving crankshaft (35) to drive the driving crankshaft (35) to rotate. The driving crankshaft (35) is axially provided with a plurality of main shaft cams (38), and each adjacent two main shaft cams (38) are oriented in opposite directions. The main shaft cams (38) are connected to the corresponding piston rod (26) to push and pull the piston (19) to axially displace along the cylinder body (18). The driven crankshaft (36) is axially provided with a plurality of slave shaft cams (39), and each adjacent two slave shaft cams (39) are oriented in opposite directions. The suction valve stem (29) and the discharge valve stem (32) are respectively matched with the two adjacent slave shaft cams (39).

5. The high-frequency suction pump according to claim 4, characterized in that: The transmission member (37) is a gear transmission assembly, a chain transmission assembly or a belt transmission assembly.

6. The high-frequency suction pump according to claim 1, characterized in that: The driving device (5) adopts a variable frequency motor.

7. The high-frequency suction pump according to claim 2, characterized in that: A first check valve (40) is provided at the inlet (13) of the pump body (4) for allowing only the medium to enter the pump body (4), and a second check valve (41) is provided at the outlet (14) of the pump body (4) for allowing only the medium to be discharged from the outside of the pump body (4).

8. The high-frequency suction pump according to claim 1, characterized in that: The pump body (4) is provided with a lubricating oil groove (42) for conveying lubricating oil to each lubricating point.

9. The high-frequency suction pump according to claim 4, characterized in that: The plurality of continuous suction units (8) are all arranged on the same side of the driving crankshaft (35) and are evenly distributed along the axial direction of the driving crankshaft (35).

10. The high-frequency suction pump according to claim 4, characterized in that: The plurality of continuous suction units (8) are arranged on both sides of the driving crankshaft (35), and the continuous suction units (8) on both sides are evenly distributed along the axial direction of the driving crankshaft (35).

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