Integrated high-pressure micro piston pump

Abstract

The utility model discloses an integrated high-pressure micro piston pump, which is internally provided with a driving device and two piston rods in transmission connection with the driving device, each piston rod is arranged in a piston cylinder, each piston cylinder is provided with two one-way valves, and each one-way valve is arranged in an air inlet channel or an air outlet channel. And the air outlet channel of one piston cylinder is communicated with the air inlet channel of the other piston cylinder through a communicating pipeline. According to the utility model, the structure is compact, the two piston cylinders are connected in series by arranging the ventilation pipeline, gas in the cylinders can be pressurized or decompressed twice in sequence, and high-pressure gas output or gas suction with strong adsorption force can be continuously carried out, so that the requirement on positive pressure or negative pressure of large pressure in production is met; the two oppositely-arranged one-way valves are arranged at the bottom of each piston cylinder, it can be ensured that one one-way valve is always in the open state in the working process of the two piston cylinders, and therefore it is ensured that after the driving device stops running accidentally, secondary starting can be smoothly conducted without conducting pressure relief operation on the piston cylinders, and safety and convenience are achieved.

Description

Technical Field

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

[0002] Micro piston pumps are widely used in production and life, but their use effects vary greatly. When the input pressure is high, some micro piston pumps will leak more or less, and the actual output effect is often not as expected. Moreover, the longer the use time, the more obvious the leakage, and the worse the output effect. The main reason is that the valve in the cylinder is not airtight enough, and the sealing effect becomes worse with the increase of the number of opening and closing times. On the other hand, when restarting for the second time after an unexpected power outage, it cannot be restarted directly due to the pressure difference between the inside and outside of the cylinder. It is necessary to manually release the pressure before restarting for the second time. Utility Model Content

[0003] In response to the problems existing in the above-mentioned prior art, the utility model provides an integrated high-pressure micro piston pump with a compact structure. It can pressurize or depressurize the gas in the cylinder twice in succession, and can continuously output high-pressure gas or inhale gas with strong adsorption force. It can also be smoothly restarted again after the driving device stops running unexpectedly without the need to relieve the pressure on the piston cylinder, which is safe and convenient.

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

[0005] An integrated high-pressure micro piston pump comprises a driving device and a piston rod connected thereto in a transmission manner, wherein the piston rod is slidably mounted in a piston cylinder, an air inlet channel and an air outlet channel are arranged at one end of the piston cylinder, and a one-way valve is arranged in each of the air inlet channel and the air outlet channel; and further comprises a housing and a connecting pipeline, wherein:

[0006] A plurality of positioning members are arranged on the outer wall of the housing, in which two piston cylinders and a driving device are detachably fixed, the driving device is a two-end output driving device, each output end of which is transmission-connected to a piston rod through a transmission mechanism, each piston rod is slidably mounted in a piston cylinder, and each end of the piston cylinder away from the piston rod is provided with two one-way valves, each one-way valve is arranged in one of the inlet passages or the outlet passages;

[0007] The two ends of the communication pipeline are respectively connected to the air outlet channel of one piston cylinder and the air inlet channel of the other piston cylinder.

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

[0009] In the above technical solution, each of the one-way valves has an umbrella-like structure, including an umbrella part and a handle part. The handle part of each one-way valve passes through the piston cylinder and is slidably connected thereto, and the umbrella part of each one-way valve can be fitted against the inner wall or the outer wall of the piston cylinder under the action of an external force; the umbrella parts of the two one-way valves on each piston cylinder are respectively arranged on the inner side and the outer side of the piston cylinder.

[0010] In the above technical solution, at the end of each piston cylinder far from the piston rod, a flange and an end cover are sequentially arranged along the axial direction and are detachably fixedly connected: two sets of hole grooves are arranged on each flange. Each set of hole grooves includes a positioning hole groove and a plurality of ventilation hole grooves. Each positioning hole groove is adapted to a handle part, and a plurality of ventilation hole grooves are arranged around the positioning hole groove and all fall within the covering area of an umbrella part; two annular protrusions are arranged on the inner wall of each end cover. The inner wall of each annular protrusion is adapted to an umbrella part. One end of each annular protrusion abuts against the flange, and the other end or the side wall of each annular protrusion is communicated with an air inlet channel or an air outlet channel.

[0011] In the above technical solution, a sealing gasket is further arranged between the flange and each annular protrusion, and a first positioning groove adapted to the sealing gasket is formed on the flange.

[0012] In the above technical solution, the housing includes a detachable face shell and a bottom shell. A plurality of second positioning hole grooves adapted to the positioning members are arranged on the face shell and / or the bottom shell, and more than one third positioning hole groove adapted to the second positioning hole grooves is arranged on the driving device.

[0013] In the above technical solution, the positioning member includes a plurality of damping rings, and each damping ring is fitted into one or two of the second positioning hole grooves in a matching manner.

[0014] In the above technical solution, each transmission mechanism includes a transmission disk and an eccentric rod. The transmission disk is arranged beside an output end of the driving device and is in transmission connection therewith. The eccentric rod is eccentrically arranged at the end of the transmission disk and extends axially toward the outer side away from the driving device. Each eccentric rod is sleeved on one end of a piston rod in a matching manner and is slidably connected thereto.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: The structure is compact. By arranging the ventilation pipeline to connect two piston cylinders in series, the gas in the cylinders can be pressurized or depressurized twice successively, and the high-pressure gas can be continuously output or the strong adsorption force can be used to inhale gas, meeting the requirements of large-pressure positive pressure or negative pressure in production; By arranging two check valves placed in opposite directions at the bottom of each piston cylinder, it can be ensured that one check valve is always in the open state during the operation of the two piston cylinders, so as to ensure that the driving device can be smoothly restarted after an accidental stop without relieving the pressure of the piston cylinders, which is safe and convenient. Brief Description of the Drawings

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

[0017] Figure 2 is the exploded structural schematic diagram of this embodiment; (the connecting pipeline is not shown)

[0018] Figure 3 is the structural schematic diagram of the piston cylinder in this embodiment;

[0019] Figure 4 is the structural schematic diagram of the end cover in this embodiment.

[0020] In the figure: 10, driving device; 20, piston rod; 30, piston cylinder; 40, intake passage; 50, outlet passage; 60, check valve; 61, umbrella part; 62, handle part; 70, housing; 71, front shell; 72, bottom shell; 80, connecting pipeline; 90, positioning part; 91, damping ring; 100, transmission mechanism; 110, flange; 111, hole groove; 112, first positioning groove; 120, end cover; 121, annular protrusion; 130, sealing gasket; 1, positioning hole groove; 2, ventilation hole groove; 4, second positioning hole groove; 5, third positioning hole groove; 6, transmission disk; 7, eccentric rod. Detailed Description of the Specific Embodiment

[0021] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] 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 specifying 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 "multiple" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "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 may be understood according to specific circumstances. In the present application, unless otherwise clearly defined 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 therebetween. 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 simply means 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 simply means that the horizontal height of the first feature is lower than that of the second feature.

[0023] As Figure 1-2 shown, an integrated high-pressure micro piston pump includes a driving device 10 and a piston rod 20 that is drivingly connected thereto. The piston rod 20 is slidably installed in a piston cylinder 30. An air inlet passage 40 and an air outlet passage 50 are provided at one end of the piston cylinder 30. Check valves 60 are provided in both the air inlet passage 40 and the air outlet passage 50. It further includes a housing 70 and a connecting pipeline 80, wherein:

[0024] A plurality of positioning members 90 are provided on the outer wall of the housing 70, and two piston cylinders 30 and a driving device 10 are detachably fixed therein. The driving device 10 is a driving device with output at both ends, and each output end thereof is transmission-connected to a piston rod 20 through a transmission mechanism 100. Each piston rod 20 is slidably mounted in a piston cylinder 30. Two one-way valves are provided at the end of each piston cylinder 30 away from the piston rod 20, and each one-way valve 60 is provided in an air inlet passage 40 or an air outlet passage 50.

[0025] The two ends of the communication pipe 80 are respectively connected to the air outlet passage 50 of one piston cylinder 30 and the air inlet passage 40 of the other piston cylinder 30 .

[0026] In this embodiment, a piston sheet is further provided at the end of each piston rod 30, and the piston sheet is adapted to the piston cylinder and can slide along the inner wall of the piston cylinder 30 driven by the piston rod 30. The working principle and composition of the piston cylinder belong to the prior art and will not be described in detail here.

[0027] During operation, the driving device 10 drives the two piston rods 20 to move synchronously in the two piston cylinders 30 through the two transmission mechanisms 10, and the connecting pipeline 80 connects the two piston cylinders 30 in series. The two piston cylinders work together to pressurize the gas twice and continuously and stably output positive pressure or negative pressure. When positive pressure is applied, the driving device 10 drives the two piston rods 20 forward and synchronously away from the bottom of the piston cylinder 30, the air pressure in the cylinder decreases, the air pressure difference pushes open the one-way valves 60 in the two air inlet channels 40, and at the same time the one-way valves 60 in the two air outlet channels 50 are pushed and closed, the gas enters the first piston cylinder 30, the piston rod 20 continues to move, and the gas in the cylinder is pressurized for the first time; the one-way valves 60 on the air outlet channels 50 of the two piston cylinders 30 are pushed open by the air pressure difference, and at the same time the air inlet channels 40 are closed, and the gas enters the connecting pipe 80; the two piston rods 20 enter the next round of movement cycle, the gas in the connecting pipe 80 is sucked into the second piston cylinder 30, and at the same time new gas is pressed into the first piston cylinder 30, the piston rod 20 continues to move to pressurize the gas in the second piston cylinder 30 for the second time and then discharge it from its exhaust channel 50. Repeating the cycle, the high-pressure gas that has been pressurized twice is continuously output from the exhaust channel 50 of the second piston cylinder 30. When negative pressure is applied, the driving device 10 drives the two piston rods 20 in reverse to first push open the one-way valve 60 on the exhaust passage 50 of the first piston cylinder 30, and the gas in the cylinder enters the connecting pipe 80. The two piston rods 20 continue to operate, and the external gas is continuously sucked into the first piston cylinder 30 and discharged from the second piston cylinder 30 and its exhaust passage 50.

[0028] When the driving device 10 accidentally stops outputting driving force during the working process, since there is a one-way valve 60 at the bottom of each piston cylinder 30 in an open state to maintain gas circulation, the air pressure in the cylinder can quickly return to the normal state, and the driving device 10 can smoothly resume operation and output driving force at any time without relieving the pressure of the two piston cylinders 30.

[0029] As Figure 2 shown, each one-way valve 60 is of an umbrella structure, including an umbrella part 61 and a handle part 62. Its handle part 62 passes through the piston cylinder 30 and is slidably connected thereto, and its umbrella part can be matched and abutted against the inner wall or outer wall of the piston cylinder 30 under the action of an external force; the umbrella parts 61 of the two one-way valves 60 on each piston cylinder 30 are respectively arranged on the inner side and the outer side of the piston cylinder 30; the housing 70 includes a face shell 71 and a bottom shell 72 which are detachably and fixedly connected, and there are several second positioning hole grooves 4 adapted to the positioning member 90 on the face shell 71 and / or the bottom shell 72, and there is more than one third positioning hole groove 5 adapted to the second positioning hole groove 4 on the driving device 10; the positioning member 90 includes several damping rings 91, and each damping ring 91 is matched and embedded in one or two second positioning hole grooves 4; each transmission mechanism 100 includes a transmission disc 6 and an eccentric rod 7. The transmission disc 6 is arranged beside an output end of the driving device 10 and is in transmission connection therewith. The eccentric rod 7 is eccentrically arranged at the end of the transmission disc and extends axially toward the outside away from the driving device 10. Each eccentric rod 7 is matched and sleeved on one end of a piston rod 20 and is slidably connected thereto.

[0030] As Figure 2-4 shown, at the end of each piston cylinder 30 away from the piston rod 20, a flange 110 and an end cover 120 are sequentially arranged along the axis in a detachable and fixedly connected manner: there are two groups of hole grooves 111 on each flange 110. Each group of hole grooves 111 includes a positioning hole groove 1 and several ventilation hole grooves 2. Each positioning hole groove 1 is adapted to a handle part 62, and several ventilation hole grooves 2 are arranged around the positioning hole groove 1 and all fall within the covering area of an umbrella part 61; a sealing gasket 130 is also arranged between the flange 110 and each annular protrusion 121, and a first positioning groove 112 adapted to the sealing gasket 130 is formed on the flange 110; there are two annular protrusions 121 on the inner wall of each end cover 120. The inner wall of each annular protrusion 121 is adapted to an umbrella part 61. One end of it abuts against the flange 110, and the other end or side wall of it is connected to an air inlet passage 40 or an air outlet passage 50.

[0031] In this embodiment, as Figure 3As shown, the flange 110 is integrally formed with the piston cylinder 30. Guide grooves adapted to the two umbrella parts 61 are provided on the outer wall of the flange 110 and the inner wall of the piston cylinder 30 to further align each one-way valve 60, ensuring that each umbrella part 61 can be completely matched and abutted against the outer wall of the flange 110 or the inner wall of the piston rod 30 to avoid air leakage.

[0032] The structure of the utility model is compact. By arranging the ventilation pipeline 80 to connect the two piston cylinders 30 in series, the gas in the cylinder can be pressurized or decompressed twice successively, and high-pressure gas output or strong adsorption force for inhaling gas can be continuously carried out to meet the requirements of large pressure positive pressure or negative pressure in production. By arranging two oppositely placed one-way valves 60 at the bottom of each piston cylinder 30, it can be ensured that one one-way valve 60 is always in the open state during the operation of the two piston cylinders 30, so as to ensure that the driving device 10 can be successfully restarted after an accidental stop without performing a pressure relief operation on the piston cylinder 30, which is safe and convenient.

[0033] The above does not impose any limitation on the technical scope of the utility model. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model still fall within the scope of the technical solution of the utility model.

Claims

1. An integrated high-pressure micro piston pump, comprising a driving device and a piston rod that is drivingly connected thereto. The piston rod is slidably disposed within a piston cylinder. One end of the piston cylinder is provided with an intake passage and an exhaust passage, and one-way valves are provided in both the intake passage and the exhaust passage. It is characterized in that: It also includes a shell and a connecting pipe, wherein: A plurality of positioning members are arranged on the outer wall of the housing, in which two piston cylinders and a driving device are detachably fixed, the driving device is a two-end output driving device, each output end of which is transmission-connected to a piston rod through a transmission mechanism, each piston rod is slidably mounted in a piston cylinder, and each end of the piston cylinder away from the piston rod is provided with two one-way valves, each one-way valve is arranged in one of the inlet passages or the outlet passages; The two ends of the communication pipeline are respectively connected to the air outlet channel of one piston cylinder and the air inlet channel of the other piston cylinder.

2. The integrated high-pressure 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, wherein the handle portion passes through the piston cylinder and is slidably connected thereto, and the umbrella portion can be matched and pressed against the inner wall or outer wall of the piston cylinder under the action of external force; the umbrella portions of the two one-way valves on each piston cylinder are respectively arranged on the inner side and the outer side of the piston cylinder.

3. The integrated high-pressure micro piston pump according to claim 2, characterized in that, The end of each piston cylinder away from the piston rod is provided with a detachably fixed flange and an end cover in sequence along the axial direction: each flange is provided with two groups of holes, each group of holes includes a positioning hole and a plurality of ventilation holes, each positioning hole is adapted to a handle, and a plurality of ventilation holes surround the periphery of the positioning hole and fall within the coverage area of an umbrella; each end cover is provided with two annular protrusions on the inner wall, the inner wall of each annular protrusion is adapted to an umbrella, one end thereof abuts against the flange, and the other end or side wall thereof is connected to an air inlet channel or an air outlet channel.

4. The integrated high-pressure micro piston pump according to claim 3, characterized in that A sealing gasket is also provided between the flange and each of the annular protrusions, and a first positioning groove which is matched one by one with the sealing gasket is formed on the flange.

5. The integrated high-pressure micro piston pump according to claim 1, characterized in that, The shell includes a front shell and a bottom shell that are detachably connected, and the front shell and / or the bottom shell are provided with a plurality of second positioning holes that are adapted to the positioning member, and the driving device is provided with one or more third positioning holes that are adapted to the second positioning holes.

6. The integrated high-pressure micro piston pump according to claim 5, characterized in that, The positioning member includes a plurality of vibration-damping rings, and each of the vibration-damping rings is matched and embedded in one or two of the second positioning hole grooves.

7. The integrated high-pressure micro piston pump according to any one of claims 1-6, characterized in that, Each of the transmission mechanisms includes a transmission disk and an eccentric rod. The transmission disk is arranged on the side of an output end of the driving device and is transmission-connected thereto. The eccentric rod is eccentrically arranged at the end of the transmission disk and extends axially toward the outside away from the driving device. Each of the eccentric rods is matched and sleeved on one end of the piston rod and is slidingly connected thereto.

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