CN113413516B - Oil filling method for needleless injector - Google Patents
Oil filling method for needleless injector Download PDFInfo
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- CN113413516B CN113413516B CN202110703946.4A CN202110703946A CN113413516B CN 113413516 B CN113413516 B CN 113413516B CN 202110703946 A CN202110703946 A CN 202110703946A CN 113413516 B CN113413516 B CN 113413516B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M2005/3114—Filling or refilling
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Abstract
The oil filling device comprises an oil filler and an oil storage tank, wherein the oil filler is provided with an oil filling cavity with adjustable volume, an oil inlet and an oil outlet which are communicated with the oil filling cavity, a first valve for opening or closing the oil inlet is mounted on the oil filler, the oil inlet is detachably connected with a vacuum pump through a first pipeline, and the oil outlet is communicated with a low-pressure oil way; the vacuum pump is used for pumping air in the oil injection cavity and the low-pressure oil way; the oil storage tank is used for storing hydraulic oil, and first pipeline is used for separating with the vacuum pump after vacuum pump evacuation to can utilize the negative pressure to draw to oiling chamber and low pressure oil circuit with the fluid in the oil storage tank with the oil storage tank intercommunication. The air content in the hydraulic oil can be reduced, so that bubbles generated in the hydraulic oil filled in the needleless injector can be effectively avoided, and the accuracy of injection dosage is ensured.
Description
Technical Field
The application relates to the field of needleless injectors, in particular to an oil filling method of a needleless injector.
Background
The needleless injector has the working principle that instant high pressure is generated after power is released by a power source to push liquid medicine to be sprayed out from the micron-sized pores, and high-speed liquid medicine flow can instantly penetrate through the skin to reach the subcutaneous part, so that the liquid medicine is dispersed and distributed under the subcutaneous part, the acting time is faster, and the medicine absorption rate is higher;
the conventional needleless injector adopting a hydraulic medium for continuous injection needs to be filled with hydraulic oil in advance, and the conventional needleless injector filling method is characterized in that hydraulic oil is filled into the needleless injector by directly utilizing a needle cylinder.
Disclosure of Invention
The application provides an oil filling device and an oil filling method for a needleless injector, so as to improve the technical problem.
The invention is particularly such that:
based on above-mentioned purpose, this application embodiment provides a needleless injector irritates oily device for pour into hydraulic oil extremely the initiative hydraulic pressure intracavity of needleless injector, needleless injector be equipped with the low pressure oil circuit of initiative hydraulic pressure chamber intercommunication, initiative hydraulic pressure chamber with be provided with check valve subassembly between the low pressure oil circuit, check valve subassembly only allows hydraulic oil to follow the low pressure oil circuit flows extremely initiative hydraulic pressure chamber, needleless injector irritates oily device and includes:
optionally, the oil filler is provided with an oil filling cavity with an adjustable volume, and an oil inlet and an oil outlet both communicated with the oil filling cavity, a first valve for opening or closing the oil inlet is mounted on the oil filler, the oil inlet is detachably connected with the vacuum pump through a first pipeline, and the oil outlet is communicated with the low-pressure oil path; the vacuum pump is used for pumping air in the oil injection cavity and the low-pressure oil way;
and the oil storage tank is used for storing hydraulic oil, the first pipeline is used for vacuumizing the vacuum pump and separating the vacuum pump, and can be communicated with the oil storage tank so as to extract oil in the oil storage tank to the oil injection cavity and the low-pressure oil way by utilizing negative pressure.
Optionally, the oil injector comprises a cylinder body and a piston, the cylinder body is provided with a cavity, the piston extends into the cavity and is slidably matched with the cylinder body, and the piston and the cylinder body jointly define the oil injection cavity; the oil inlet and the oil outlet are both arranged on the cylinder body.
Optionally, an oil inlet joint and an oil outlet joint are arranged on the cylinder body, the oil inlet joint is communicated with the oil inlet, the oil outlet joint is communicated with the oil outlet, the first pipeline is communicated with the oil inlet joint, and the first valve is arranged on the oil inlet joint; the oil outlet joint is used for being communicated with the low-pressure oil way through a second pipeline.
Optionally, a first port and a second port are respectively arranged at two ends of the first pipeline, a third port is arranged on the pipe wall of the first pipeline, the first port is communicated with the oil inlet, a second valve is arranged on the second port, and the second valve is used for controlling the on-off of the second port; the third port is used for being detachably connected with the vacuum pump; and a third valve is arranged at the third port and used for controlling the on-off of the third port.
Optionally, the first conduit is provided as a hose.
Based on the above purpose, the present embodiment further provides an oil filling method for a needleless injector, which is suitable for the oil filling device for a needleless injector, and the oil filling method for a needleless injector includes the following steps:
when the first valve is in a state of opening the oil inlet, air in the first pipeline, the oil injection cavity and the low-pressure oil way is extracted by using a vacuum pump;
after the vacuumizing is finished, the first pipeline separated from the vacuum pump is closed so as to enable a pipe cavity of the first pipeline to be isolated from the external environment, the closed first pipeline is placed into an oil storage tank, and part of the first pipeline is located below the oil liquid level of the oil storage tank;
opening the first pipeline to enable the first pipeline to be communicated with the oil storage tank so as to suck hydraulic oil in the oil storage tank into the oil injection cavity and the low-pressure oil path by using negative pressure;
closing the first valve.
Optionally, before the step of pumping air in the first pipeline, the oil filling cavity, and the low-pressure oil path by using a vacuum pump in a state where the first valve is in the state of opening the oil inlet, the method further includes:
and a conducting piece which can be dissolved in hydraulic oil is arranged at the one-way valve component, and the conducting piece enables the low-pressure oil way and the active hydraulic cavity to be communicated in a two-way mode so as to pump air out of the active hydraulic cavity during vacuumizing.
Optionally, the conducting piece is paraffin.
Optionally, the paraffin is provided in a spherical structure.
Optionally, the step of closing the first valve further comprises separating the first pipe from the oil filler.
The invention has the beneficial effects that:
in summary, the present embodiment provides an oil filling device for a needleless injector, which can fill hydraulic oil into an active hydraulic cavity of the needleless injector so as to provide power for the operation of the needleless injector. Because the first pipeline is arranged at the oil inlet of the oil injector, and the first valve is arranged at the oil inlet, the first valve can open or close the oil inlet, before the hydraulic oil needs to be filled, the first valve is firstly in an open state, and the first pipeline is communicated with the oil inlet. Then, a vacuum pump is connected to the first pipeline, and air in the first pipeline, the oil injection cavity and the low-pressure oil way is sucked by the vacuum pump, so that the air quantity in the whole loop is reduced. After the vacuumizing operation is completed, the vacuum pump and the first pipeline are separated, the first pipeline is inserted into the oil storage tank, hydraulic oil in the oil storage tank is pumped into the oil injection cavity and the low-pressure oil way by negative pressure, the oil injection is quick and convenient, the efficiency is high, the air content in the hydraulic oil can be reduced, bubbles can be effectively prevented from being generated in the hydraulic oil injected into the needleless injector, and the accuracy of the injection dosage is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic view of the structure of the needleless injector oil filling device provided by the present application in cooperation with a needleless injector;
FIG. 2 is a schematic view of a portion A of FIG. 1;
fig. 3 is a schematic structural diagram of a modified example of the fitting of the oil filling device of the needleless injector provided by the present application and the needleless injector.
Icon:
1-a body; 2-low pressure oil circuit; 3-a one-way valve assembly; 31-a valve core; 32-installing a channel; 321-a first flow channel; 322-a second flow channel; 33-an elastic return member; 4-an active hydraulic chamber; 5-an oil lubricator; 501-oil injection cavity; 502-oil outlet; 503-oil inlet joint; 504-oil inlet; 505-oil outlet joint; 506-a vent fitting; 6-a piston; 7-a first valve; 8-a first conduit; 9-an oil storage tank; 10-a second conduit; 11-a vacuum pump; 12-third conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
At present, when a needleless injector is filled with oil, hydraulic oil in an oil tank is directly injected into the needleless injector, and because a large amount of air exists in the needleless injector, the air is mixed into the hydraulic oil to generate air bubbles, and the air bubbles can absorb energy and be compressed when the needleless injector is triggered, so that the injection dosage of each triggering of the needleless injector is inaccurate.
In view of this, designers have designed an oil filling device and an oil filling method for a needleless injector, which can reduce or even eliminate air bubbles in hydraulic oil injected into the needleless injector, thereby ensuring the accuracy of injection dosage.
It is noted that the needleless injector may be a single charge multiple injection dual pressure needleless injector or a single charge multiple injection needleless injector, and the needleless injector may be of any conventional construction, for example, the needleless injector may be of the construction disclosed in the patent publication CN110292684A or CN 110279914A.
Referring to fig. 1-3, for easy understanding, the needleless injector includes a main body 1, a low pressure oil path 2 and a driving hydraulic chamber 4 communicated with the low pressure oil path 2 are disposed inside the main body 1, one end of the low pressure oil path 2 is communicated with an oil inlet channel disposed on the main body 1, and the oil inlet channel is used for communicating with a pipeline. A check valve assembly 3 is provided between the low pressure oil passage 2 and the active hydraulic chamber 4, and the check valve assembly 3 allows hydraulic oil to flow only in a direction from the low pressure oil passage 2 to the active hydraulic chamber 4, but prevents hydraulic oil from flowing from the active hydraulic chamber 4 to the low pressure oil passage 2. Specifically, an installation channel 32 is arranged between the low-pressure oil path 2 and the active hydraulic chamber 4, the installation channel 32 includes a first flow passage 321 and a second flow passage 322 which are communicated, the first flow passage 321 is communicated with the low-pressure oil path 2, and the second flow passage 322 is communicated with the active hydraulic chamber 4. The first flow passage 321 is a tapered flow passage, the cross-sectional profile of the first flow passage 321 is circular, the inner diameter of the first flow passage 321 gradually increases in a direction from the end connected to the low-pressure oil passage 2 to the end communicated with the second flow passage 322, that is, the end of the first flow passage 321 having the smaller inner diameter is communicated with the low-pressure oil passage 2, and the end of the first flow passage 321 having the larger inner diameter is communicated with the active hydraulic chamber 4. The check valve assembly 3 comprises a valve core 31 and an elastic resetting piece 33, wherein the valve core 31 is of a spherical structure, the valve core 31 is arranged in the first flow passage 321, the elastic resetting piece 33 is arranged in the second flow passage 322, and the elastic resetting piece 33 is abutted against the valve core 31 and used for enabling the valve core 31 to have a movement tendency of being in sealing connection with the inner wall of the first flow passage 321. In an initial state, the elastic restoring member 33 keeps the valve element 31 in a position abutting against the inner wall of the first flow passage 321 all the time, so as to block the low-pressure oil passage 2 and the active hydraulic chamber 4, and when hydraulic oil flows from the low-pressure oil passage 2 to the active hydraulic chamber 4 and the oil pressure is greater than the elastic force of the elastic restoring member 33, the valve element 31 is pushed open, so that the low-pressure oil passage 2 is communicated with the active hydraulic chamber 4. When the oil pressure disappears or is smaller than the elastic force of the elastic restoring piece 33, the elastic restoring piece 33 restores the valve core 31, and the valve core 31 is in sealing connection with the inner wall of the first flow passage 321, so that one-way conduction is realized.
It should be understood that the resilient return 33 may be provided as a spring.
Referring to fig. 1, in the present embodiment, the oil filling device for a needleless injector includes:
the oil filling device 5 is provided with an oil filling cavity 501 with adjustable volume, an oil inlet 504 and an oil outlet 502 which are communicated with the oil filling cavity 501, a first valve 7 for opening or closing the oil inlet 504 is mounted on the oil filling device 5, the oil inlet 504 is detachably connected with a vacuum pump 11 through a first pipeline 8, and the oil outlet 502 is communicated with a low-pressure oil way 2; the vacuum pump 11 is used for pumping air in the oil injection cavity 501 and the low-pressure oil path 2;
and the oil storage tank 9, the oil storage tank 9 is used for storing hydraulic oil, the first pipeline 8 is used for being separated from the vacuum pump 11 after the vacuum pump 11 is vacuumized, and can be communicated with the oil storage tank 9 so as to pump the oil in the oil storage tank 9 to the oil injection cavity 501 and the low-pressure oil path 2 by using negative pressure.
The needleless injector oil filling device provided by the embodiment can fill hydraulic oil into the active hydraulic cavity 4 of the needleless injector so as to provide power for the action of the needleless injector. Because the first pipeline 8 is arranged at the oil inlet 504 of the oil injector 5, and the first valve 7 is arranged at the oil inlet 504, the first valve 7 can open or close the oil inlet 504, before the hydraulic oil needs to be filled, the first valve 7 is in an open state, and the first pipeline 8 is communicated with the oil inlet 504. Then, the vacuum pump 11 is connected to the first pipe 8, and the vacuum pump 11 sucks air in the first pipe 8, the oil filling chamber 501, and the low-pressure oil passage 2, thereby reducing the amount of air in the entire circuit. After the vacuumizing operation is completed, the vacuum pump 11 and the first pipeline 8 are separated, the first pipeline 8 is inserted into the oil storage tank 9, hydraulic oil in the oil storage tank 9 is pumped into the oil injection cavity 501 and the low-pressure oil way 2 through negative pressure, the oil injection is rapid and convenient, the efficiency is high, the air content in the hydraulic oil can be reduced, bubbles can be effectively prevented from being generated in the hydraulic oil injected into the needleless injector, and the accuracy of injection dosage is ensured.
Meanwhile, the oil injector 5 is provided with an oil injection cavity 501 with adjustable volume, and after the needle-free injector is fired for one time, hydraulic oil in the oil injection cavity 501 enters the needle-free injector by reducing the volume of the oil injection cavity 501, so that the needle-free injector can be fired again, and the function of multiple injections during one-time charging is realized.
In the present embodiment, the lubricator 5 may alternatively include a cylinder provided with a chamber and a guide hole communicating with the chamber, and a piston 6. An oil inlet 504 and an oil outlet 502 are both provided on the cylinder, and the oil inlet 504 and the oil outlet 502 are both communicated with the chamber. A guide rod is connected to the piston 6, the piston 6 is arranged in the cavity, and the piston 6 and the cylinder body jointly define an oil injection cavity 501. The guide rod is slidably engaged with a guide hole, and a vent connector 506 is provided at a port of the guide hole away from the chamber. By inflating the breather joint 506, the piston 6 can be moved to reduce the volume of the oil injection chamber 501, so that the hydraulic pressure chamber in the oil injection chamber 501 is injected into the low-pressure oil passage 2.
Optionally, an oil inlet joint 503 and an oil outlet joint 505 are further installed on the cylinder body, the oil inlet joint 503 is communicated with the oil inlet 504, and the first valve 7 is arranged on the oil inlet joint 503. An oil outlet joint 505 is communicated with the oil outlet 502, the oil outlet joint 505 is connected with a second pipeline 10, and the second pipeline 10 is communicated with an oil inlet channel on the main body 1.
In this embodiment, optionally, the first pipe 8 is provided with a first port, a second port and a third port, and the first port and the second port are two ports in the length direction of the first pipe 8. The third port is located between the first port and the second port. The first port communicates with an oil inlet connection 503. The second port is for insertion into the oil reservoir 9. The third port is for communication with a vacuum pump 11.
Furthermore, a second valve is arranged at the second port and used for controlling the on-off of the second port, a third valve is arranged at the third port and used for controlling the on-off of the third port. During evacuation, the first port is in communication with the oil inlet connection 503, the second valve at the second port is closed, and the second port is blocked from the external environment. The third port is in communication with the vacuum pump 11 and the first valve 7 and the third valve are both in an open state. The vacuum pump 11 is started, and the vacuum pump 11 pumps out air in the first pipeline 8, the oil injection cavity 501, the second pipeline 10 and the low-pressure oil path 2, so that the first pipeline 8, the oil injection cavity 501, the second pipeline 10 and the low-pressure oil path 2 form a vacuum environment. The valve of the third port is then closed, disconnecting the third port from the vacuum pump 11. The second port is inserted into the oil storage tank 9, the second port is immersed in oil in the oil storage tank 9, then the second valve is opened, under the action of negative pressure, hydraulic oil in the oil storage tank 9 is extracted into the oil injection cavity, the second pipeline 10 and the low-pressure oil path 2, after the hydraulic cavity is extracted in a proper amount, the first valve 7 is closed, the first pipeline 8 can be detached, so that the hydraulic oil in the first pipeline 8 flows back into the oil storage tank 9, and the waste of the hydraulic oil is reduced. In addition, through the matching use of the first valve 7, the second valve and the third valve, the vacuum degree can be effectively ensured, air in the first pipeline 8, the oil injection cavity 501, the second pipeline 10 and the low-pressure oil way 2 is extracted as far as possible, the air is prevented from entering the first pipeline 8 when the first pipeline 8 is inserted into oil, the vacuum degree is improved, and the adverse effect of bubbles on the accuracy of injection dosage is effectively reduced.
It should be noted that both the first duct 8 and the second duct 10 may be provided as hoses. The first valve 7, the second valve and the third valve can be set as solenoid valves.
Referring to fig. 3, in other embodiments, the vacuum pump 11 is communicated with the oil storage tank 9 through the third pipeline 12, and an end of the third pipeline 12 has a distance from an oil surface, during a vacuum pumping operation, one end of the first pipeline 8 is inserted into hydraulic oil of the oil storage tank 9, the other end of the first pipeline is communicated with the oil inlet connector 503, the first valve 7 is opened, the vacuum pump 11 is started, the vacuum pump 11 first pumps air in the oil storage tank 9, negative pressure is generated in the oil storage tank 9, air in the first pipeline 8, the oil injection cavity 501, the second pipeline 10 and the low-pressure oil path 2 enters the oil storage tank 9, and the air bubbles out of the oil surface and is pumped out through the third pipeline 12, so that a vacuum pumping effect is good. That is, the first pipe 8 is indirectly connected to the vacuum pump 11 through the oil tank 9 and the third pipe 12.
The needleless injector oil filling device provided by the embodiment has a simple and reasonable structure, can realize multiple times of injection after the hydraulic oil is stored in the oil filling cavity 501, and improves the efficiency. And air bubbles are not easy to exist in the hydraulic oil during each injection, so that the accuracy of the injection dosage of the needleless injector is not easy to influence.
The embodiment also provides an oil filling method for the needleless injector, which is suitable for the oil filling device for the needleless injector mentioned in the embodiment. The method comprises the following steps:
in the state that the first valve 7 is at the open oil inlet 504, the vacuum pump 11 is used for pumping air in the first pipeline 8, the oil injection cavity 501 and the low-pressure oil path 2;
after the vacuum pumping is finished, the first pipeline 8 separated from the vacuum pump 11 is closed to enable the pipe cavity of the first pipeline 8 to be isolated from the external environment, the closed first pipeline 8 is placed into the oil storage tank 9, and the part of the first pipeline 8 is located below the oil liquid level of the oil storage tank 9;
opening the first pipe 8 to communicate the first pipe 8 with the oil reservoir 9 to suck the hydraulic oil in the oil reservoir 9 into the oil filling chamber 501 and the low-pressure oil passage 2 by using the negative pressure;
the first valve 7 is closed.
According to the oil filling method for the needleless injector, before hydraulic oil is filled into the active hydraulic cavity 4, vacuumizing is performed, and air in the first pipeline 8, the oil filling cavity 501 and the low-pressure oil way 2 is reduced, so that bubbles in the hydraulic oil filled into the active hydraulic cavity 4 are reduced, and the accuracy of the injection dosage of the needleless injector is not easily influenced.
Optionally, before the step of pumping the air in the first pipeline 8, the oil injection chamber 501 and the low-pressure oil path 2 by using the vacuum pump 11 in a state that the first valve 7 is in a state of opening the oil inlet 504, the method further includes:
a conducting piece capable of being dissolved in hydraulic oil is arranged at the one-way valve component 3, and the conducting piece enables the low-pressure oil way 2 and the active hydraulic cavity 4 to be communicated in a two-way mode so as to pump air out of the active hydraulic cavity 4 during vacuumizing. The conducting piece can be paraffin. In actual operation, the conducting part is arranged between the inner wall of the first flow passage 321 and the valve core 31, and the conducting part is clamped between the inner wall of the first flow passage 321 and the valve core 31 under the action of the elastic resetting part 33 and is not easy to drop, so that the check valve component 3 loses the function of one-way conduction, even when hydraulic oil is not injected into the active hydraulic cavity 4 from the low-pressure oil passage 2, the valve core 31 is not in a closed state, and therefore, in vacuum pumping, gas in the active hydraulic cavity 4 can be pumped out, the vacuum degree of the needleless injector is further improved, and the residual air quantity is reduced. And after the vacuumizing is finished, hydraulic oil enters the active hydraulic cavity 4 from the low-pressure oil way 2, the conducting piece is dissolved in the hydraulic oil, the blocking effect on the valve core 31 is lost, the check valve component 3 has the function of one-way conduction again, the hydraulic oil in the active hydraulic cavity 4 cannot reversely flow to the low-pressure oil way 2, and the needleless injector can be normally used.
Obviously, in other embodiments, the conducting element may not be limited to paraffin, but may be made of other materials that can be dissolved in hydraulic oil.
In other embodiments, after the step of closing the first valve 7, the first pipeline 8 and the oil injector 5 are separated, so that after the hydraulic oil in the oil injection cavity 501 is completely used, a syringe with the stored hydraulic oil is arranged at the oil inlet joint 503, the oil is continuously supplied to the oil injection cavity 501, no external space is introduced, and the needleless injector is convenient and reliable to use.
The needleless injector oil filling method provided by the embodiment firstly carries out vacuum pumping on the needleless injector, so that the air content in an oil transportation passage is greatly reduced and even zero, and thus, the air bubbles in hydraulic oil are few, the adverse effect of the air bubbles in the hydraulic oil on the injection dosage of the needleless injector is reduced, and the injection dosage is more accurate.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A needleless injector oil filling method is suitable for a needleless injector oil filling device, the needleless injector oil filling device is used for filling hydraulic oil into an active hydraulic cavity of a needleless injector, the needleless injector is provided with a low-pressure oil way communicated with the active hydraulic cavity, a check valve component is arranged between the active hydraulic cavity and the low-pressure oil way, and the check valve component only allows the hydraulic oil to flow from the low-pressure oil way to the active hydraulic cavity; the needleless injector oil filling device comprises an oil filler and an oil storage tank, wherein the oil filler is provided with an oil filling cavity with adjustable volume, an oil inlet and an oil outlet which are communicated with the oil filling cavity, a first valve for opening or closing the oil inlet is mounted on the oil filler, the oil inlet is detachably connected with a vacuum pump through a first pipeline, and the oil outlet is communicated with the low-pressure oil way; the vacuum pump is used for pumping air in the oil injection cavity and the low-pressure oil way;
the oil storage tank is used for storing hydraulic oil, and the first pipeline is used for being separated from the vacuum pump after the vacuum pump is vacuumized and can be communicated with the oil storage tank so as to pump the oil in the oil storage tank to the oil injection cavity and the low-pressure oil way by utilizing negative pressure; the oil filling method of the needleless injector is characterized by comprising the following steps:
when the first valve is in a state of opening the oil inlet, a conducting piece capable of being dissolved in hydraulic oil is arranged at the one-way valve assembly, and the conducting piece enables the low-pressure oil way and the active hydraulic cavity to be communicated in a two-way mode so as to pump air out of the active hydraulic cavity during vacuumizing; pumping air in the first pipeline, the oil injection cavity and the low-pressure oil way by using a vacuum pump;
after the vacuumizing is finished, the first pipeline separated from the vacuum pump is closed so as to enable a pipe cavity of the first pipeline to be isolated from the external environment, the closed first pipeline is placed into an oil storage tank, and part of the first pipeline is located below the oil liquid level of the oil storage tank;
opening the first pipeline to enable the first pipeline to be communicated with the oil storage tank so as to suck hydraulic oil in the oil storage tank into the oil injection cavity and the low-pressure oil path by using negative pressure;
closing the first valve.
2. The needleless injector oiling method of claim 1, wherein:
the oil injector comprises a cylinder body and a piston, the cylinder body is provided with a cavity, the piston extends into the cavity and is matched with the cylinder body in a sliding mode, and the piston and the cylinder body jointly define the oil injection cavity; the oil inlet and the oil outlet are both arranged on the cylinder body.
3. The needleless injector oiling method of claim 2, wherein:
an oil inlet joint and an oil outlet joint are arranged on the cylinder body, the oil inlet joint is communicated with the oil inlet, the oil outlet joint is communicated with the oil outlet, the first pipeline is communicated with the oil inlet joint, and the first valve is arranged on the oil inlet joint; the oil outlet joint is used for being communicated with the low-pressure oil way through a second pipeline.
4. The needleless injector oiling method of claim 1, wherein:
a first port and a second port are respectively arranged at two ends of the first pipeline, a third port is arranged on the pipe wall of the first pipeline, the first port is communicated with the oil inlet, a second valve is arranged at the second port, and the second valve is used for controlling the on-off of the second port; the third port is used for being detachably connected with the vacuum pump; and a third valve is arranged at the third port and used for controlling the on-off of the third port.
5. The needleless injector oiling method of claim 1, wherein:
the first pipe is provided as a hose.
6. The needleless injector oiling method of claim 1, wherein:
the conducting piece is made of paraffin.
7. The needleless injector oiling method of claim 6, wherein:
the paraffin is arranged into a spherical structure.
8. The needleless injector oiling method of claim 1, wherein:
further comprising, after the step of closing the first valve, separating the first conduit from the lubricator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110703946.4A CN113413516B (en) | 2021-06-24 | 2021-06-24 | Oil filling method for needleless injector |
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| CN102256690A (en) * | 2008-12-16 | 2011-11-23 | 皇家飞利浦电子股份有限公司 | Hydrophobic valve |
| CN112253464A (en) * | 2020-11-12 | 2021-01-22 | 意朗实业（上海）有限公司 | Oil path control device, screw compressor system and oil path control method |
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| JP3759082B2 (en) * | 2001-08-10 | 2006-03-22 | シルバー株式会社 | Liquid supply device |
| US9763461B2 (en) * | 2009-10-28 | 2017-09-19 | Bkon Llc | Vacuum infusion method |
| CN102817883B (en) * | 2012-09-11 | 2014-12-17 | 浙江大学 | Multi-functional special oiling device for deep-sea hydraulic system |
| CN105036049A (en) * | 2015-08-03 | 2015-11-11 | 江西洪都航空工业集团有限责任公司 | Vacuumizing oil injection device |
| CN110415930A (en) * | 2019-07-24 | 2019-11-05 | 国网浙江省电力有限公司检修分公司 | The online vacuum oiling device of conservator and its application method |
| CN110279914B (en) * | 2019-08-09 | 2024-07-09 | 江苏丞宇米特医疗科技有限公司 | Needleless injector capable of filling medicine once and injecting multiple times |
| CN110745765A (en) * | 2019-11-19 | 2020-02-04 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Single-port oil injection device for slurry pulse generator and using method thereof |
| CN213505951U (en) * | 2020-09-24 | 2021-06-22 | 周迎春 | Oil vacuum suction and pressurization filling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256690A (en) * | 2008-12-16 | 2011-11-23 | 皇家飞利浦电子股份有限公司 | Hydrophobic valve |
| CN112253464A (en) * | 2020-11-12 | 2021-01-22 | 意朗实业（上海）有限公司 | Oil path control device, screw compressor system and oil path control method |
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