Switching mechanism and passive box

Abstract

The utility model relates to the technical field of injectors, in particular to a switching mechanism and a passive box. Comprising a first air inlet allowing a first air source to enter, a second air inlet allowing a second air source to enter and a first air outlet; the control assembly comprises a first channel allowing the second air source to circulate and a valve element movably arranged in the first channel. And the valve core can cut off the first channel. According to the switching mechanism and the passive box, an air source is divided into a first air source and a second air source after being decompressed through a pressure reducing valve, the first air source is directly connected with a pneumatic valve, the second air source enters the pneumatic valve after being connected with a control assembly, the control assembly can control on-off of the second air source, and then on-off of the pneumatic valve is controlled.

Description

Technical Field

[0001] This utility model relates to the technical field of syringes, and more particularly to a switching mechanism and a passive box. Background Technology

[0002] Needleless injectors, also known as pulse drug delivery injectors, are generally used for large-scale vaccination and some veterinary applications. They are gas-driven, which can generate high pressure and is suitable for rapid and efficient drug injection. With existing gas supply systems, it is often necessary to switch the gas on and off. Current on / off switching requires a large number of electronic devices, such as solenoid valves and power supply systems. Such devices need to be tested for electrical safety and electromagnetic compatibility. Utility Model Content

[0003] In view of the problems existing in the above-mentioned switching mechanisms and passive boxes, this utility model is proposed.

[0004] Therefore, one of the objectives of this utility model is to provide a switching mechanism, the purpose of which is to provide a switch for opening and closing a gas path.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a switching mechanism, comprising,

[0006] The pneumatic valve includes a first air inlet for a first air source, a second air inlet for a second air source, and a first air outlet; and,

[0007] The control component includes a first channel for the flow of the second gas source, and a valve core movably disposed in the first channel;

[0008] The valve core can isolate the first channel.

[0009] In a preferred embodiment of the switching mechanism described in this utility model, the first air inlet is connected to a first pipe for the flow of a first air source.

[0010] In a preferred embodiment of the switching mechanism described in this utility model, the second air inlet is connected to a second pipe for the flow of a second air source.

[0011] In a preferred embodiment of the switching mechanism described in this utility model, the ends of the first pipe and the second pipe are connected.

[0012] In a preferred embodiment of the switching mechanism of this utility model, the control component includes a mounting tube, and the interior of the mounting tube is the first channel;

[0013] The valve core is rotatably mounted in the mounting tube via a mounting shaft, and a first spring is provided between the valve core and the mounting tube;

[0014] The mounting shaft extends out of the mounting tube and has a handle at its end;

[0015] The valve core is disc-shaped and its side is sealed to the inner wall of the mounting tube.

[0016] In a preferred embodiment of the switching mechanism of this utility model, the control component includes a mounting block, and the mounting block has a first channel and a second channel inside, the first channel and the second channel being arranged crosswise;

[0017] The valve core is cylindrical and is slidably disposed in the second channel, and the valve core is provided with a through hole;

[0018] The length of the valve core is greater than the width of the first channel, and the outer wall of the valve core is sealed to the inner wall of the second channel.

[0019] As a preferred embodiment of the switching mechanism of this utility model, the control component includes a pressing shaft disposed at one end of the valve core and an elastic component disposed between the valve core and the second channel;

[0020] The end of the pressing shaft extends through the second channel.

[0021] In a preferred embodiment of the switching mechanism described in this utility model, the bottom of the mounting block is provided with an extended base plate;

[0022] The control component includes a pressing shaft disposed at one end of the valve core, the pressing shaft extending out of the second channel and having a pressing plate at its end;

[0023] An elastic element is provided between the pressing plate and the base plate.

[0024] The beneficial effects of this switching mechanism are as follows: after the first air source enters the pneumatic valve, it will be discharged from the first air outlet. The operation of the pneumatic valve can be controlled by the control component. When the second air source enters the pneumatic valve through the control component, the pneumatic valve will open and the first air source can be discharged smoothly.

[0025] Another objective of this invention is to provide a passive box, the purpose of which is to provide a switch for opening and closing the air passage.

[0026] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a passive box, including the aforementioned switching mechanism, and further comprising;

[0027] Box body;

[0028] A pressure reducing valve is installed inside the housing and includes a second air outlet and a third air inlet connected to the main air source.

[0029] The pneumatic valve is located inside the housing, and the first and second pipes can be connected to the second air outlet.

[0030] As a preferred embodiment of the passive box described in this utility model, a four-way valve is connected to the second air outlet, and the first air source and the second air source are connected to the four-way valve.

[0031] The box is equipped with a pressure gauge.

[0032] The pressure gauge and the four-way valve are connected via a third pipe.

[0033] The beneficial effects of this utility model are as follows: after the air source is depressurized by the pressure reducing valve, it is divided into a first air source and a second air source. The first air source is directly connected to the pneumatic valve, and the second air source is connected to the control component and then enters the pneumatic valve. The control component can control the on / off state of the second air source, thereby controlling the on / off state of the pneumatic valve. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 An overall schematic diagram of Embodiment 1 is shown;

[0036] Figure 2 A schematic diagram of the control components of Embodiment 1 is shown;

[0037] Figure 3 A schematic diagram of the control components in Embodiment 2 is shown;

[0038] Figure 4 A schematic diagram of the control components in Embodiment 3 is shown;

[0039] Figure 5 An overall schematic diagram of Embodiment 4 is shown;

[0040] Figure 6 A schematic diagram of the interior of the box in Embodiment 4 is shown. Detailed Implementation

[0041] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0042] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0043] Example 1, referring to Figure 1 and Figure 2 The first embodiment of this utility model provides a switching mechanism, including a pneumatic valve 100 and a control component 200;

[0044] The pneumatic valve 100 includes a first air inlet 101 for a first air source, a second air inlet 102 for a second air source, and a first air outlet 103.

[0045] Furthermore, the first air inlet 101 is connected to a first pipe 104 for the flow of the first air source; the second air inlet 102 is connected to a second pipe 105 for the flow of the second air source.

[0046] The control component 200 includes a first channel S1 for the flow of a second air source, and a valve core 201 movably disposed in the first channel S1. The valve core 201 can block the first channel S1. After the second air source passes through the first channel S1, it enters the second air inlet 102. When the valve core 201 blocks the first channel S1, the second air source cannot enter the second air inlet 102.

[0047] During operation, the first gas source in the first pipeline 104 enters from the first inlet 101 and exits from the first outlet 103. The gas can be guided to the working equipment by installing the pipe 202 at the first outlet 103. The second gas source enters the pneumatic valve 100 from the second inlet 102 through the second pipeline 105 to ensure that the first inlet 101 and the first outlet 103 are connected. When no second gas source enters the second inlet 102, the first gas source enters from the first inlet 101 but cannot exit from the first outlet 103, and at this time there is no gas input to the working equipment.

[0048] The second pipe 105 is connected to the second air inlet 102, and the second air source enters the second air inlet 102 from the second pipe 105, opening the passage between the first air inlet 101 and the first air outlet 103; wherein the second pipe 105 is disconnected into two, and the first channel S1 of the control component 200 is located at the disconnection point of the second pipe 105 and connects the two second pipes 105.

[0049] Preferably, the ends of the first pipe 104 and the second pipe 105 are connected, and the gases from the first gas source and the second gas source can be from the same source, splitting from one gas source into two streams to form the first gas source and the second gas source respectively.

[0050] Furthermore, the control component 200 includes an installation tube 202, the internal space of which is a first channel S1. Both ends of the installation tube 202 are connected to the disconnected second pipe 105. The valve core 201 is disc-shaped and is rotatably installed in the installation tube 202 via an installation shaft 203. The rotation of the installation shaft 203 can control the outer side of the valve core 201 to overlap and seal with the inner wall of the first channel S1, thereby isolating the first channel S1.

[0051] Furthermore, a first spring 204 is provided between the valve core 201 and the mounting tube 202. Two first springs 204 are provided and symmetrically installed on the two end faces of the valve core 201. The elastic force of the first springs 204 keeps the outer side of the valve core 201 overlapping with the inner wall of the mounting tube 202, thus isolating the first channel S1.

[0052] The mounting shaft 203 extends out of the mounting tube 202 and has a handle 205 at its end. By rotating the handle 205, the valve core 201 can be rotated to separate from the inner wall of the mounting tube 202, thereby opening the first channel S1.

[0053] During operation, the first channel S1 is opened by turning the handle 205, allowing the second air source to enter the second air inlet 102, thus connecting the first air inlet 101 with the first air outlet 103 to supply air to the working equipment.

[0054] Example 2, refer to Figure 3 This is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that the control component 200 includes a mounting block 206. The mounting block 206 has a first channel S1 and a second channel S2 inside, which are arranged to cross each other. The second channel S2 crosses the first channel S1. The disconnected second pipe 105 is connected to both ends of the first channel S1 inside the mounting block 206.

[0055] The valve core 201 is cylindrical and slidably disposed in the second channel S2. The valve core 201 has a through hole 201a. The length of the valve core 201 is greater than the width of the first channel S1, and the outer wall of the valve core 201 is sealed to the inner wall of the second channel S2. The valve core 201 slides in the second channel S2. When the valve core 201 slides into the first channel S1 and blocks the entire first channel S1, both ends of the valve core 201 are sealed to the second channel S2, which can isolate the first channel S1. The control assembly 200 also includes a control element 207 disposed on the valve core 201.

[0056] Furthermore, the control component 207 includes a pressing shaft 207a disposed at one end of the valve core 201 and an elastic element 207b disposed between the valve core 201 and the second channel S2; the end of the pressing shaft 207a extends out of the second channel S2 and is sealed with the second channel S2; the elastic element 207b is provided between the valve core 201 and the second channel S2, and the elastic element 207b is made of a spring or a metal sheet. Under the elastic force of the spring, the middle part of the valve core 201 is located in the first channel S1 and isolates the first channel S1.

[0057] During operation, by holding the mounting block 206 and pressing the pressing shaft 207a with the thumb, the valve core 201 can be controlled to slide in the second channel S2, so that the valve core 201 no longer blocks the first channel S1, and the second air source can enter the second air inlet 102, so that the first air inlet 101 and the first air outlet 103 are connected to supply air to the working equipment.

[0058] The remaining structures are the same as those in the embodiment.

[0059] Example 3, referring to Figure 4 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the bottom of the mounting block 206 is provided with an extended base plate 206a; wherein the disconnected second pipe 105 is connected to both ends of the first channel S1 inside the mounting block 206, and the second pipe 105 is connected to the first channel S1 from the side of the mounting block 206. The base plate 206a can increase the bottom area of ​​the mounting block 206, so that the mounting block 206 can be placed stably on the ground.

[0060] The control component 207 includes a pressing shaft 207a disposed at one end of the valve core 201. The pressing shaft 207a passes through the second channel S2 and has a pressing plate 207c at its end. The pressing shaft 207a is sealed with the second through groove. An elastic element 207b is disposed between the pressing plate 207c and the base plate 206a. The elastic element 207b is made of a spring or a metal sheet.

[0061] During operation, the foot press plate 207c controls the pressing shaft 207a and the valve core 201 to slide in the second channel S2, so that the valve core 201 no longer blocks the first channel S1, and the second air source can enter the second air inlet 102, so that the first air inlet 101 and the first air outlet 103 are connected to supply air to the working equipment.

[0062] The remaining structures are the same as those in the embodiment.

[0063] Example 4, refer to Figure 5 and Figure 6 The fourth embodiment of this utility model provides a passive box, which includes a switching mechanism, a box body 300, and a pressure reducing valve 400.

[0064] The housing 300 has an internal accommodating space. The pressure reducing valve 400 is installed inside the housing 300. The pressure reducing valve 400 includes a second air outlet 402 and a third air inlet 401 connected to the main air source. The end of the third air inlet 401 extends out of the housing 300.

[0065] The main air source is connected to the third air inlet 401, and the pressure of the main air source is reduced through the pressure reducing valve 400.

[0066] The pneumatic valve 100 is located inside the housing 300. The first pipe 104 and the second pipe 105 can be connected to the second air outlet 402. The first air outlet 103 and the second air inlet 102 of the pneumatic valve 100 extend out of the housing 300. After the total air source is depressurized by the pressure reducing valve 400, it is discharged from the second air outlet 402 and divided into two streams, which are connected to the first air inlet 101 and the second air inlet 102 through the first pipe 104 and the second pipe 105 respectively.

[0067] The second pipe 105 extends from inside the housing 300 to install the control component 200 and then connects to the second air inlet 102.

[0068] Furthermore, a four-way valve 403 is connected to the second air outlet 402. The first pipe 104 and the second pipe 105 are connected to the four-way valve 403. A pressure gauge 500 is installed inside the housing 300. The pressure gauge 500 is connected to the four-way valve 403 through a third pipe 501. One end of the four-way valve 403 is connected to the second air outlet 402, and the other three ends are connected to the first pipe 104, the second pipe 105, and the third pipe 501, respectively.

[0069] Furthermore, the box body 300 is equipped with a lid to completely seal the internal storage space, and the ends of the pressure gauge 500 and the pressure reducing valve 400 protrude from the top of the box body 300.

[0070] The main gas source can be a carbon dioxide cylinder. The carbon dioxide cylinder is connected to the third air inlet 401. During use, the main gas source enters the pressure reducing valve 400 from the third air inlet 401, and then exits from the second air outlet 402 into the four-way valve 403. One stream of gas enters the pressure gauge 500 to monitor the pressure in real time, and the other two streams enter the first air inlet 101 and the second air inlet 102 respectively.

[0071] The air supply to the first air outlet 103 is controlled by the connection of the isolation of the first channel S1 by the control component 200. No electronic equipment is used in the whole box, and no electrical safety and electromagnetic compatibility tests are required during use.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A switching mechanism, characterized in that: include, A pneumatic valve (100) includes a first air inlet (101) for a first air source, a second air inlet (102) for a second air source, and a first air outlet (103); and, The control component (200) includes a first channel (S1) for the flow of the second gas source, and a valve core (201) movably disposed in the first channel (S1). The valve core (201) can block the first channel (S1).

2. The switching mechanism according to claim 1, characterized in that: The first air inlet (101) is connected to a first pipe (104) for the first air source to flow through.

3. The switching mechanism according to claim 2, characterized in that: The second air inlet (102) is connected to a second pipe (105) for the flow of a second air source.

4. The switching mechanism according to claim 3, characterized in that: The ends of the first pipe (104) and the second pipe (105) are connected.

5. The switching mechanism according to any one of claims 1 to 4, characterized in that: The control component (200) includes a mounting tube (202), the interior of which is the first channel (S1); The valve core (201) is rotatably mounted in the mounting tube (202) via the mounting shaft (203), and a first spring (204) is provided between the valve core (201) and the mounting tube (202). The mounting shaft (203) extends out of the mounting tube (202) and has a handle (205) at its end; The valve core (201) is disc-shaped and its side is sealed to the inner wall of the mounting tube (202).

6. The switching mechanism according to claim 2 or 3, characterized in that: The control component (200) includes a mounting block (206), which has a first channel (S1) and a second channel (S2) inside, and the first channel (S1) and the second channel (S2) are arranged crosswise; The valve core (201) is cylindrical and is slidably disposed in the second channel (S2). The valve core (201) is provided with a through hole (201a). The length of the valve core (201) is greater than the width of the first channel (S1), and the outer wall of the valve core (201) is sealed to the inner wall of the second channel (S2); The control assembly (200) also includes a control element (207) disposed on the valve core (201).

7. The switching mechanism according to claim 6, characterized in that: The control element (207) includes a pressing shaft (207a) disposed at one end of the valve core (201) and an elastic element (207b) disposed between the valve core (201) and the second channel (S2). The end of the pressing shaft (207a) extends through the second channel (S2).

8. The switching mechanism according to claim 6, characterized in that: The mounting block (206) has an extended base plate (206a) at its bottom. The control component (207) includes a pressing shaft (207a) disposed at one end of the valve core (201), the pressing shaft (207a) passing through the second channel (S2) and having a pressing plate (207c) at its end; An elastic element (207b) is provided between the pressing plate (207c) and the base plate (206a).

9. A passive box, characterized in that: Including the switching mechanism as described in claim 8, and further comprising: Box body (300); A pressure reducing valve (400) is disposed inside the housing (300) and includes a second air outlet (402) and a third air inlet (401) connected to the main air source. The pneumatic valve (100) is located inside the housing (300), and the first pipe (104) and the second pipe (105) can be connected to the second air outlet (402).

10. The passive box according to claim 9, characterized in that: A four-way valve (403) is connected to the second air outlet (402), and the first pipe (104) and the second pipe (105) are connected to the four-way valve (403); The box (300) is equipped with a pressure gauge (500). The pressure gauge (500) and the four-way valve (403) are connected by a third pipe (501).

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