Integrated large-flow micro piston pump

Abstract

A driving device is in transmission connection with two transmission shafts which extend in the same direction and can drive the transmission shafts to rotate synchronously in the same direction, each transmission shaft is provided with an eccentric rod, each eccentric rod is in transmission connection with two piston rods which are arranged oppositely, and each piston cylinder is provided with two one-way valves which are arranged oppositely. The same driving device is arranged to drive the two groups of cylinder bodies which are oppositely arranged and are communicated with each other through the pipeline, air flow can be continuously pressurized for more than two times to form high negative pressure or high positive pressure air flow, the transmission structure is simple, the sealing stability with the cylinder bodies is better, the flow is large, and the noise is low; each cylinder body is provided with the two oppositely-arranged one-way valves, one one-way valve on each cylinder body is in an open state under the condition of accidental power failure, automatic pressure relief of each cylinder body is achieved, and it is guaranteed that the piston pump can be safely and smoothly started for the second time.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pumps, in particular to an integrated large-flow micro piston pump. Background Art

[0002] The piston pump is the main functional component of a vacuum machine. At present, there are mainly two problems in the operation of a large-flow vacuum machine, that is, a large-flow piston pump, one is the noise problem, and the other is the problem of secondary start-up after power failure. Among them, the generation of noise is mainly caused by the impact of air flow on the internal structural components of the pump and the resulting vibration of the pump body. Especially for large-flow piston pumps, the noise is often greater. In order to reduce the noise, a buffer or a silencing component is arranged in the pump, making the volume of the pump body relatively large; when an accidental power failure occurs during operation, due to the large negative pressure generated by the large-flow load, it is difficult to start up again. Generally, it is necessary to manually relieve the pressure first and then start the motor. If the motor is forced to start, it is easy to cause damage to the motor. Content of the Utility Model

[0003] In view of the above problems existing in the prior art, the utility model provides an integrated large-flow micro piston pump, which can continuously pressurize the air flow more than twice to form a high negative pressure or a high positive pressure air flow, and has a simple transmission structure, good sealing stability with the cylinder block, large flow rate, low noise, and can automatically relieve the pressure of each cylinder block after an accidental power failure to ensure that the piston pump can be safely and smoothly started up again.

[0004] To solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] An integrated large-flow micro piston pump, comprising a driving device and a piston rod drivingly connected thereto, the driving device being capable of driving the piston rod to move within a cylinder block; wherein:

[0006] The driving device is drivingly connected to two coaxial transmission shafts extending in the same direction and capable of driving them to rotate synchronously in the same direction. An eccentric rod is provided on each of the transmission shafts. Each eccentric rod is drivingly connected to two oppositely arranged piston rods. Each piston rod is installed within a cylinder block and is slidably connected thereto. The two cylinder blocks are respectively arranged on the radial sides of one of the transmission shafts. Each eccentric rod can synchronously drive the two piston rods to move in the same direction, so as to increase the air pressure within one cylinder block and simultaneously decrease the air pressure within the other cylinder block;

[0007] At each end of each cylinder body away from the piston rod, there are two oppositely arranged one-way valves, and each one-way valve is connected to a pipeline: the four pipelines arranged on the same side of the two transmission shafts are all first pipelines and are connected to the air inlet of the piston pump through a connecting pipeline, the four pipelines arranged on the other same side of the two transmission shafts are all second pipelines, one second pipeline is connected to one end of the connecting pipeline, the two second pipelines are interconnected, and the other second pipeline is connected to the exhaust port of the piston pump.

[0008] As a further elaboration of the above technical solution:

[0009] In the above technical solution, each piston rod has a horn structure, a through hole adapted to the eccentric rod is provided at its smaller end, and a piston piece adapted to the inner wall of one cylinder body is provided at its larger end; the two piston rods are sleeved on one eccentric rod along the axial direction and both extend radially along it.

[0010] In the above technical solution, each one-way valve has an umbrella-like structure and includes an umbrella part and a handle part; there are two groups of hole grooves provided on each cylinder body, each group of hole grooves includes a positioning hole and several air passing hole grooves circumferentially surrounding it, each positioning hole is adapted to a handle part, and the area enclosed by several air passing hole grooves falls inside the covering area of one umbrella part; the two one-way valves are respectively movably installed on the two groups of hole grooves, and their umbrella parts are respectively arranged on the inner side and the outer side of one cylinder body.

[0011] In the above technical solution, on the inner wall and the outer wall of each cylinder body, there is also a valve piece provided outside the two groups of hole grooves, at least one guiding hole is provided on each valve piece, and each guiding hole is adapted to an umbrella part.

[0012] In the above technical solution, at the end of each cylinder body, an end cover is sleeved outside the two one-way valves, two first pipelines or second pipelines are provided on each end cover, one end of each first pipeline or second pipeline is adapted to a one-way valve, and the other end extends to the end face of the end cover.

[0013] In the above technical solution, it further includes an I-shaped housing, the driving device is fitted in the middle thereof, a transmission shaft, two piston rods and two cylinder bodies connected in sequence are respectively and correspondingly arranged in one end part of the housing; the housing is formed by matching and buckling a face shell and a bottom shell both having an I-shaped structure.

[0014] In the above technical solution, it further includes several adjusting parts, each adjusting part can fix the face shell or the bottom shell and can adjust their distance.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging a single driving device to drive two sets of cylinders that are oppositely arranged and interconnected through pipelines, the air flow can be continuously pressurized more than twice to form a high negative pressure or high positive pressure air flow. Moreover, the transmission structure is simple, the sealing stability with the cylinders is good, the flow rate is large, and the noise is small; By arranging two oppositely arranged one-way valves on each cylinder, in the event of an accidental power failure, one one-way valve on each cylinder is in an open state, realizing automatic pressure relief of each cylinder and ensuring that the piston pump can be safely and smoothly started for the second time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of this embodiment;

[0017] Figure 2 is a schematic structural diagram of another perspective of this embodiment;

[0018] Figure 3 is a schematic structural diagram of this embodiment after removing the housing;

[0019] Figure 4 is an exploded schematic structural diagram of a piston cylinder in this embodiment;

[0020] Figure 5 is a schematic structural diagram of the cylinder in this embodiment.

[0021] In the figure: 20, driving device; 30, piston rod; 31, through hole; 40, cylinder; 50, one-way valve; 60, piston piece; 70, end cover; 80, housing; 81, front shell; 82, bottom shell; 90, adjusting part; 1, transmission shaft; 2, eccentric rod; 3, first pipeline; 4, connecting pipeline; 5, second pipeline; 7, umbrella part; 8, handle part; 9, hole groove; 901, positioning hole; 902, air passing hole groove; 10, valve piece; 101, guiding hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "several" and "a plurality" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0024] As Figures 1-3 shown, the integrated large-flow micro piston pump includes a driving device 20 and a piston rod 30 that is drivingly connected thereto. The driving device 20 can drive the piston rod 30 to move within a cylinder block 40; wherein:

[0025] The driving device 20 is in transmission connection with two drive shafts 1 extending in the same direction and can drive them to rotate synchronously in the same direction. An eccentric rod 2 is provided on each drive shaft 1, and each eccentric rod 2 is in transmission connection with two oppositely arranged piston rods 30. Each piston rod 30 is installed in a cylinder block 40 and is slidably connected thereto. The two cylinder blocks 40 are respectively arranged on the radial two sides of a drive shaft 1. Each eccentric rod 2 can synchronously drive the two piston rods 30 to move in the same direction, so as to increase the air pressure in one cylinder block 40 and simultaneously decrease the air pressure in the other cylinder block 40;

[0026] Two oppositely arranged one-way valves 50 are provided at the end of each cylinder block 40 away from the piston rod 30, and each one-way valve 50 is connected to a pipeline: the four pipelines arranged on the same side of the two drive shafts 1 are all first pipelines 3 and are connected to the air inlet of the piston pump through a connecting pipeline 4. The four pipelines arranged on the other same side of them are all second pipelines 5. One second pipeline 5 is connected to one end of the connecting pipeline 4, the two second pipelines 5 are interconnected, and the other second pipeline 5 is connected to the air outlet of the piston pump.

[0027] It can be understood that the driving device 20 drives the two drive shafts 1 to drive the two eccentric rods 2 to pull the four piston rods 30 to slide in the cylinder blocks 40 respectively. Since the two drive shafts 1 rotate synchronously in the same direction, negative pressure or positive pressure is synchronously generated in the two cylinder blocks 40 arranged on one side of the driving device 20, and positive pressure or negative pressure is synchronously generated in the two cylinder blocks 40 on the other side. As Figure 1 shown, during operation, the driving device 20 drives the piston rod 30 to slide to generate negative pressure in the two cylinder blocks 40 on the same side, and the corresponding one-way valves 50 thereon are opened, and the air flow is sucked into the two cylinder blocks 40 through the air inlet and the two first pipelines 3; the driving device 20 continuously drives the piston rod 30 to move, the gas in the cylinder block 40 is pressurized for the first time and then pushes open the other one-way valve 50, and is discharged from the other two first pipelines 3 under the negative pressure guidance in the two cylinder blocks 40 on the other side and enters one cylinder block 40 on the other side through a second pipeline 5. The air flow is pressurized for the second time and enters the other cylinder block 40 through the interconnected two second pipelines 5, and the air flow is pressurized for the third time and is discharged from the other second pipeline 5 through the air outlet. When the power is unexpectedly cut off during negative pressure, since a corresponding one-way valve 50 on each of the four cylinder blocks 40 is in an open state, each cylinder block 41 will automatically relieve pressure, so that the four piston rods 30 are all in a state of not being stressed, and can be restarted smoothly when the power is turned on again.

[0028] As Figures 4-5As shown in the figure, each piston rod 30 has a horn structure. A through hole 31 adapted to the eccentric rod 2 is provided at its smaller end, and a piston piece 60 adapted to the inner wall of a cylinder block 40 is provided at its larger end; the two piston rods 30 are sleeved on an eccentric rod 2 along the axial direction and both extend radially along it; each one-way valve 50 has an umbrella structure and includes an umbrella part 7 and a handle part 8; two sets of hole grooves 9 are provided on each cylinder block 40. Each set of hole grooves 9 includes a positioning hole 901 and several air passing hole grooves 902 circumferentially surrounding it. Each positioning hole 901 is adapted to a handle part 8, and the area enclosed by several air passing hole grooves 902 falls inside the covering area of an umbrella part 7; the two one-way valves 50 are respectively movably installed on the two sets of hole grooves 9, and their umbrella parts 7 are respectively arranged on the inner side and the outer side of a cylinder block 40; valve plates 10 are respectively provided on the inner wall and the outer wall of each cylinder block 40 outside the two sets of hole grooves 9. At least one guiding hole 101 is provided on each valve plate 10, and each guiding hole 101 is adapted to an umbrella part 7; end caps 70 are respectively sleeved on the ends of each cylinder block 40 outside the two one-way valves 50. Two first pipelines 3 or second pipelines 5 are provided on each end cap 70. One end of each first pipeline 3 or second pipeline 4 is adapted to a one-way valve 50, and the other end extends to the end face of the end cap 60.

[0029] It can be understood that the piston piece 60 can seal the cylinder block 40 and the piston rod 30 to ensure the air tightness in the cylinder block 40 and ensure the transmission efficiency; the valve plate 10 can continuously correct the two one-way valves 50 during the operation of the piston pump. In this embodiment, one valve plate 10 is embedded on the outer wall of the cylinder block 40 and is pressed against the cylinder block 40 by the end cap 70, and the other valve plate 10 is magnetically fixed to the inner wall of the cylinder block 40.

[0030] As Figures 1-2 shown in the figure, it further includes an I-shaped housing 80. The driving device 20 is fitted in its middle, and a transmission shaft 1, two piston rods 30 and two cylinder blocks 40 connected in sequence are respectively and correspondingly arranged in one end of the housing 80; the housing 80 is formed by fitting and buckling a face shell 81 and a bottom shell 82 both having an I-shaped structure; several adjusting parts 90 are provided on both the face shell 81 and the bottom shell 82. Each adjusting part 90 can fix the face shell 81 or the bottom shell 82 and can adjust their spacing. In this embodiment, the adjusting part 90 is an adjusting screw, which penetrates through the face shell 81 and the bottom shell 82 and is screwed with them.

[0031] In the utility model, by arranging the same driving device 20 to drive two sets of cylinder blocks 40 which are oppositely arranged and communicated with each other through pipelines, the air flow can be continuously pressurized more than twice to form a high negative pressure or high positive pressure air flow, and the transmission structure is simple, the sealing stability with the cylinder block is good, the flow rate is large, and the noise is small; by arranging two oppositely arranged one-way valves 50 on each cylinder block 40, one one-way valve 50 on each cylinder block 40 is in an open state in case of accidental power failure, realizing the automatic pressure relief of each cylinder block 40 and ensuring that the piston pump can be safely and smoothly started for the second time.

[0032] The above does not impose any limitation on the technical scope of the present utility model. Any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An integrated large-flow micro piston pump, comprising a driving device and a piston rod connected thereto, wherein the driving device can drive the piston rod to move in a cylinder; characterized in that: The driving device is in driving connection with two transmission shafts extending in the same direction and can drive them to rotate synchronously in the same direction. Each transmission shaft is provided with an eccentric rod. Each eccentric rod is in driving connection with two oppositely arranged piston rods. Each piston rod is installed in one cylinder body and is slidably connected thereto. The two cylinder bodies are respectively provided on the radial sides of one transmission shaft. Each eccentric rod can synchronously drive the two piston rods to move in the same direction, so as to increase the air pressure in one cylinder body and reduce the air pressure in the other cylinder body at the same time. Each cylinder body is provided with two oppositely arranged one-way valves at the end away from the piston rod, and each of the one-way valves is connected to a pipeline: the four pipelines arranged on the same side of the two transmission shafts are all first pipelines and are connected to the air inlet of the piston pump through a connecting pipeline, and the four pipelines arranged on the other same side are all second pipelines, one of the second pipelines is connected to one end of the connecting pipeline, two second pipelines are connected to each other, and another second pipeline is connected to the exhaust port of the piston pump.

2. The integrated large flow micro piston pump according to claim 1, characterized in that: Each piston rod is of a trumpet structure, with a through hole matched with the eccentric rod at its smaller end and a piston sheet matched with the inner wall of the cylinder body at its larger end; the two piston rods are axially sleeved on one eccentric rod and both extend radially thereof.

3. The integrated large flow micro piston pump according to claim 1, characterized in that: Each of the one-way valves is an umbrella-shaped structure, including an umbrella portion and a handle portion; each of the cylinder bodies is provided with two groups of hole grooves, each group of the hole grooves includes a positioning hole and a plurality of air-through hole grooves circumferentially surrounding its periphery, each of the positioning holes is adapted to a handle portion, and the area enclosed by the plurality of air-through hole grooves falls inside the coverage area of ​​an umbrella portion; the two one-way valves are respectively movably mounted on the two groups of the hole grooves, and their umbrella portions are respectively arranged on the inner side and the outer side of a cylinder body.

4. The integrated large flow micro piston pump according to claim 3, characterized in that: A valve plate is also provided on the inner wall and the outer wall of each cylinder body outside the two groups of hole grooves, and each valve plate is provided with at least one guide hole, and each guide hole is adapted to an umbrella portion.

5. The integrated large flow micro piston pump according to claim 4, characterized in that: An end cover is provided at the end of each cylinder body on the periphery of the two one-way valves, and two first pipelines or second pipelines are provided on each end cover. One end of each first pipeline or second pipeline is adapted to a one-way valve, and the other end extends to the end surface of the end cover.

6. The integrated large flow micro piston pump according to any one of claims 1 to 5, characterized in that: It also includes an I-shaped shell, the driving device is matched and installed in the middle of it, and the transmission shaft, two piston rods and two cylinder bodies connected in sequence are matched and placed in one end of the shell respectively; the shell is composed of a surface shell and a bottom shell both of which are I-shaped structures and are matched and buckled.

7. The integrated large flow micro piston pump according to claim 6, characterized in that: It also includes a plurality of adjusting parts, each of which can fix the surface shell or the bottom shell and adjust the distance between them.

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