CN217816194U - Gas circuit protection device and gas circuit system - Google Patents

Abstract

The application discloses a gas circuit protection device and a gas circuit system, wherein the gas circuit protection device comprises a container, a floating body and a vacuum suction nozzle, a containing cavity for containing the floating body and the vacuum suction nozzle is formed in the container, a first connector and a second connector are arranged at the top of the container, two opposite ends of the first connector are respectively used for connecting an external liquid storage container and the containing cavity, and two opposite ends of the second connector are respectively used for connecting an external gas source and the vacuum suction nozzle; the vacuum suction nozzle is positioned right above the floating body, the floating body is of a hollow structure and comprises a first body, a second body and a third body, the second body is matched with the accommodating cavity in a sliding mode along the vertical direction, the first body is connected to one end, close to the vacuum suction nozzle, of the second body, and the shape of the first body is matched with that of the vacuum suction nozzle so as to be attached to the vacuum suction nozzle; the third body is connected to one end of the second body far away from the vacuum suction nozzle and is in point contact with the bottom point of the container. The technical problem that this application was solved is for providing a gas circuit protection device and gas circuit system that reliability is higher.

Description

Gas circuit protection device and gas circuit system

Technical Field

The utility model relates to a gas circuit protection technical field especially relates to a gas circuit protection device and gas circuit system.

Background

When the blood cell analyzer is used, actions such as emptying or filling of a liquid storage container need to be performed through positive and negative switching of an air path. When the liquid storage container is normally used, the air path connector is far away from the highest liquid level of the liquid storage container, and liquid cannot enter the air path. If the machine breaks down when the negative pressure suction, the system can not rely on the time sequence or control command to terminate the negative pressure suction, liquid will constantly pour into the stock solution container, and excessive liquid can approach the gas circuit joint gradually after coming in, makes liquid finally sucked into the gas circuit, damages gas circuit components and parts and brings liquid and leaks and lead to biological pollution.

In the prior art, in order to prevent the liquid which is excessively filled from entering the gas circuit, a device for preventing the liquid from being filled into the gas circuit is generally installed on the gas circuit connected with the liquid storage container end. The existing gas circuit protection device mainly comprises a tank body, a floating body and a vacuum chuck, wherein the vacuum chuck is connected with an external gas source, and the floating body is placed in the tank body. Excessive liquid can drive the body come-up after getting into the casing, can be held by vacuum chuck after the body come-up take the altitude to rely on the negative pressure to seal the gas circuit, finally prevent liquid entering gas circuit.

However, in the existing structure, the floating body is made of solid foaming materials, and the floating body is easy to drop scraps and is sucked into an air passage to cause air passage blockage. And the floating body shakes during floating, so that the positions of the vacuum suction cups adsorbed at each time are different, and the vacuum suction cups and the floating body cannot be attached to each other, thereby affecting the sealing reliability.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses the main technical problem who solves provides a gas circuit protection device and gas circuit system that the reliability is higher.

In order to achieve the above object, the embodiment of the present invention provides a technical solution that:

a gas circuit protection device comprises a container, a floating body and a vacuum suction nozzle, wherein an accommodating cavity extending in the vertical direction is formed in the container, the floating body and the vacuum suction nozzle are both positioned in the accommodating cavity, the vacuum suction nozzle is close to the top of the container relative to the floating body, a first connector and a second connector are arranged at the top of the container, two opposite ends of the first connector are respectively used for connecting an external liquid storage container and the accommodating cavity, and two opposite ends of the second connector are respectively used for connecting an external gas source and the vacuum suction nozzle;

the floating body is of a hollow structure and comprises a first body, a second body and a third body which are sequentially connected, the second body is slidably matched with the accommodating cavity along the vertical direction, the first body is connected to one end, close to the vacuum suction nozzle, of the second body, and the shape of the first body is matched with that of the vacuum suction nozzle so as to be attached to the vacuum suction nozzle; the third body is connected to one end of the second body far away from the vacuum suction nozzle and is in point contact with the bottom of the container.

As an optional embodiment of the present application, the first body, the second body and the third body are all hollow structures, and the opening sizes of the end of the first body facing the second body and the end of the third body facing the second body are increased.

As an optional embodiment of the present application, the first body, the second body, and the third body are made of plastic materials, and are welded, bonded, or screwed together.

As an optional embodiment of the present application, the first body, the second body and the third body are all of a solid of revolution structure.

As an optional implementation mode of the application, at least one air guide groove is formed in the inner side wall of the container, and the air guide groove extends upwards from the bottom of the accommodating cavity along the vertical direction.

As an optional implementation mode of the application, one end, close to the floating body, of the vacuum suction nozzle is horn-shaped, and one end, close to the vacuum suction nozzle, of the first body is conical or spherical.

As an alternative embodiment of the present application, the second body is hollow cylindrical and/or the third body is hollow hemispherical.

As an optional embodiment of the present application, the accommodating chamber, the floating body and the vacuum nozzle are all arranged coaxially.

As an optional implementation mode of the application, the accommodating cavity comprises a limiting cavity and a transition cavity located above the limiting cavity, the diameter of the transition cavity is larger than that of the limiting cavity, the vacuum suction nozzle is located in the transition cavity, and the floating body is in sliding fit with the limiting cavity.

Furthermore, the utility model also provides a gas circuit system, include air supply, pressure regulating unit, stock solution container and according to above the gas circuit protection device, the air supply passes through the pressure regulating unit with first articulate, the stock solution container with second articulate.

In the above-mentioned embodiment of this application, because the body is hollow structure, including the first body, second body and the third body that connect gradually, the shape of first body suits with vacuum suction nozzle's shape, and the second body cooperates along vertical direction and holding chamber slidable, when the holding intracavity gets into solution, can ensure that the body directly is close to vacuum suction nozzle along vertical direction, lets first body vacuum suction nozzle closely adsorb, seals the gas circuit. In addition, the third body is in point contact with the bottom of the container, so that a sufficient gap is formed between the bottom of the floating body and the bottom of the container, and the vacuum adsorption between the floating body and the bottom of the container after the floating body is static for a long time is avoided. The gas circuit protection device of this application can accomplish the sealing of gas circuit through as few components as possible, and the structure is retrencied, the reliability is high, and the body adopts the hollow structure of non-foaming material, has avoided the piece to block up the gas circuit.

Drawings

FIG. 1 is a cross-sectional view of an air path protection device in an embodiment of the present application;

FIG. 2 is a cross-sectional view of the gas path protection device after being injected with a solution in the embodiment of the present application;

FIG. 3 is a cross-sectional view of a float according to an embodiment of the present application;

fig. 4 is a schematic view of an air path system in an embodiment of the present application.

The reference numbers illustrate:

100-container, 101-tank body, 102-tank cover, 110-accommodating cavity, 111-transition cavity, 112-limiting cavity, 120-sealing ring, 130-air guide groove, 210-first joint, 220-second joint, 300-floating body, 310-first body, 320-third body, 330-second body, 400-vacuum suction nozzle, 500-air source, 600-pressure regulating unit and 700-liquid storage container.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the drawings and specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

It will also be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 4, an embodiment of the present application provides an air path protection device, which includes a container 100, a floating body 300, and a vacuum suction nozzle 400, where the container 100 may include a tank 101 and a tank cover 102 detachably connected to the tank 101, an accommodating cavity 110 extending in a vertical direction is formed in the tank 101, and the tank cover 102 is used for covering the accommodating cavity 110. The float 300 and the vacuum nozzle 400 are both located within the receiving cavity 110, and the float 300 is proximate the top of the container 100 (i.e., the pool cover 102) relative to the vacuum nozzle 400. The top of the container 100, i.e. the tank cover 102, is provided with a first joint 210 and a second joint 220 penetrating through the tank cover 102, two opposite ends of the first joint 210 are respectively used for communicating the external liquid storage container 700 and the accommodating cavity 110, and two opposite ends of the second joint 220 are respectively used for communicating the external air source 500 and the vacuum suction nozzle 400. In the embodiment shown in the drawings, the vacuum suction nozzle 400 is attached to a side of the pool cover 102 adjacent to the floating body 300, and is positioned directly above the floating body 300. In other embodiments, the vacuum nozzle 400 may be spaced apart from the pool cover 102, and one end of the second connector 220 extends into the receiving cavity 110 to connect with the vacuum nozzle 400.

The floating body 300 is a hollow structure, and is disposed in the accommodating chamber 110 and slidably engaged with the accommodating chamber 110 in a vertical direction. Specifically, the floating body 300 includes a first body 310, a second body 330 and a third body 320 which are connected in sequence, the second body 330 is slidably matched with the accommodating cavity 110 along the vertical direction, the first body 310 is connected to one end of the second body 330 close to the vacuum nozzle 400, and the shape of the first body 310 is adapted to the shape of the vacuum nozzle 400 so as to be capable of fitting to the vacuum nozzle 400; the third body 320 is connected to an end of the second body 330 remote from the vacuum nozzle 400 and makes point contact with the bottom of the container 100 (bottom of the tank body 101). Further, the floating body 300 may be floated by filling gas therein, and the wall structure may be made of a light material such as plastic or rubber without using a foamed material. The third body 320 makes a point contact with the bottom of the container 100 so that there is a sufficient gap between the bottom of the floating body 300 and the bottom of the container 100 to prevent the floating body 300 from vacuum-absorbing with the bottom of the container 100 after it is stationary for a long time. The first body 310 is used for the vacuum suction nozzle 400 to suck, when the outside solution enters the accommodating cavity 110, the floating body 300 can float, and the second body 330 makes the floating body 300 move along the vertical direction under the limit of the accommodating cavity 110 and is close to the vacuum suction nozzle 400 located right above the floating body 300. When the float 300 floats to be close to the vacuum nozzle 400, the vacuum nozzle 400 sucks the first body 310 and is closely attached to the first body 310, thereby sealing the air path.

In specific implementation, the air path protection device is installed between the air source 500 and the liquid storage container 700, and the air source provides negative pressure to the liquid storage container 700 through the 500 air path protection device to fill the liquid storage container 700 with solution. When any link fails, so that the liquid storage container 700 cannot stop filling, the excessive solution enters the accommodating cavity 110 through the first connector 210. The floating body 300 ascends along the vertical direction under the buoyancy of the solution and gradually approaches the vacuum suction nozzle 400, and after the floating body 300 ascends to a certain height, the first body 310 of the floating body 300 is adsorbed by the vacuum suction nozzle 400, so that the gas path is closed, and the liquid is prevented from being finally sucked into the gas path to damage components of the gas path. After the worker finishes repairing the fault, the worker only needs to unscrew the tank cover 102 and pour out the solution in the accommodating cavity 110, and the tank can be reused.

In the above embodiment of the present application, since the floating body 300 is a hollow structure, and includes the first body 310, the second body 330 and the third body 320, which are connected in sequence, the shape of the first body 310 is adapted to the shape of the vacuum suction nozzle 400, and the second body 330 is slidably matched with the accommodating cavity 110 along the vertical direction, when a solution enters the accommodating cavity 110, the floating body 300 can be ensured to be directly close to the vacuum suction nozzle 400 along the vertical direction, so that the vacuum suction nozzle 400 of the first body 310 can tightly adsorb the solution, and the air path is closed. In addition, the third body 320 is in point contact with the bottom of the container 100, so that there is a sufficient gap between the bottom of the floating body 300 and the bottom of the container 100, and vacuum adsorption of the floating body 300 to the bottom of the container 100 after a long time of rest is prevented. The gas circuit protection device can complete the sealing of the gas circuit through the elements as few as possible, the structure is simplified, the reliability is high, the floating body 300 is of a hollow structure made of non-foaming materials, and the gas circuit blockage caused by fragments is avoided.

As an alternative embodiment of the present application, the second body 330 is a hollow structure, and both an end of the first body 310 facing the second body 330 and an end of the third body 320 facing the second body 330 are gradually enlarged. In the embodiment shown in the drawings, a center hole is formed through to both ends in the second body 330, and an opening communicating with the center hole is formed at each of an end of the first body 310 facing the second body 330 and an end of the third body 320 facing the second body 330, so that the inner hollow space of the float 300 is as large as possible. In other embodiments, the second body 330 may be a hollow structure, and the first body 310 and the third body 320 are both solid structures.

Further, the first body 310, the second body 330 and the third body 320 are made of plastic materials and are welded, bonded or screwed together. The plastic material has low density and is easy to be formed into a required shape. In this embodiment, the first body 310, the second body 330 and the third body 320 are integrally connected by welding or bonding, and a hollow structure is formed inside thereof so that the floating body 300 can float up with respect to the solution. The density of the float may be designed to be less than or equal to 0.6g per cubic centimeter. Since the density of water is 1g per cubic centimeter, most of the test solutions have a density between 0.7 and 1.2g per cubic centimeter. Therefore, the folded density of the floating body 300 is designed to be less than or equal to 0.6g per cubic centimeter, which can meet the requirement of floating.

Further, the receiving chamber 110, the float 300, and the vacuum nozzle 400 are coaxially arranged. In the embodiment shown in the drawings, the accommodating chamber 110, the floating body 300 and the vacuum suction nozzle 400 are all of a revolving body structure and are arranged in sequence along the same axial direction (exactly the vertical direction). The coaxial arrangement of the accommodating chamber 110, the floating body 300 and the vacuum suction nozzle 400 can improve the accuracy of the suction, so that the second body 330 of the floating body 300 is directly close to the vacuum suction nozzle 400 along the axial direction (vertical direction) under the limit of the accommodating chamber 110. Further, the first body 310, the second body 330 and the third body 320 may be all of a revolving structure, so that the center of gravity of the floating body 300 is centered and is easily matched with the vacuum suction nozzle 400.

Preferably, at least one air guide groove 130 is formed on the inner side wall of the container 100, and the air guide groove 130 extends upward from the bottom of the accommodating cavity 110 along the vertical direction. The air guide groove 130 is disposed such that the bottom of the accommodating chamber 110 is communicated with the upper portion of the accommodating chamber 110 on the inner sidewall. After the floating body 300 is placed in the accommodating cavity 110, although the lower portion of the accommodating cavity 110 is sealed, the air guide groove 130 on the sidewall cannot be sealed, so that vacuum adsorption between the bottom of the floating body 300 and the bottom of the container 100 is further prevented.

Preferably, the accommodating cavity 110 comprises a transition cavity 111 close to the pool cover 102 and a limit cavity 112 far away from the pool cover 102, the limit cavity 112 is located above the transition cavity 111, the diameter of the transition cavity 111 is larger than that of the limit cavity 112, the vacuum suction nozzle 400 is located in the transition cavity 111, and the second body 330 of the floating body 300 is in sliding fit with the limit cavity 112. In the embodiment shown in the drawings, the outer diameter of the second body 330, i.e., the maximum outer diameter of the float 300, and the size of the restraining chamber 112, which is comparable to the outer diameter of the second body 330, restrain the float 300 such that the float 300 can move only in the vertical direction. The size of the transition chamber 111 is larger than the diameter of the stopper chamber 112 so as to facilitate the introduction of gas or liquid into the first connector 210. Preferably, pond lid 102 and cell body 101 screw-thread fit set up sealing washer 120 between pond lid 102 and the cell body 101, and after gas circuit protection device closed the gas circuit, the staff only need repair the trouble, then rotatory open pond lid 102, pour out the solution in the holding chamber 110, can insert the gas circuit once more and use.

As a specific embodiment of the present application, one end of the vacuum nozzle 400 close to the floating body 300 is horn-shaped, and one end of the first body 310 close to the vacuum nozzle 400 is cone-shaped or spherical, so that the vacuum nozzle 400 and the adsorption structure 310 can be better attached to each other to seal the gas path. Further, an end of the third body 320 near the bottom of the container 100 is spherical, and the spherical third body 320 is in point contact with the bottom surface of the container 100. The second body 330 may be cylindrical and slidably fit with the accommodating cavity 110.

In addition, please continue to refer to fig. 4, the present invention further provides a gas circuit system, which comprises a gas source 500, a pressure regulating unit 600, a liquid storage container 700 and a gas circuit protection device according to the above, wherein the gas source 500 is connected to the first joint 210 through the pressure regulating unit 600, and the liquid storage container is connected to the second joint 220. The air source 500 is used for providing positive pressure or negative pressure, and when the air source 500 provides the positive pressure, the solution in the reservoir 700 is discharged; when the air source 500 provides negative pressure, the reservoir 700 draws in external solution. The pressure regulating unit 600 is used for regulating the air pressure of the air source 500. When any link fails, so that the liquid storage container 700 cannot stop filling, the excessive solution enters the accommodating cavity 110 through the first connector 210. The floating body 300 rises along the vertical direction under the buoyancy of the solution and is gradually close to the vacuum suction nozzle 400, and after the floating body 300 rises to a certain height, the vacuum suction nozzle 400 adsorbs the floating body 300, so that the gas circuit is closed, and the liquid is prevented from being continuously poured into and damaging gas circuit components. After the staff finishes the fault repairing, the solution in the accommodating cavity 110 only needs to be poured out, and the container can be used again.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A gas circuit protection device comprises a container, a floating body and a vacuum suction nozzle, wherein an accommodating cavity extending in the vertical direction is formed in the container, the floating body and the vacuum suction nozzle are both positioned in the accommodating cavity, the vacuum suction nozzle is close to the top of the container relative to the floating body, a first connector and a second connector are arranged at the top of the container, two opposite ends of the first connector are respectively used for connecting an external liquid storage container and the accommodating cavity, and two opposite ends of the second connector are respectively used for connecting an external gas source and the vacuum suction nozzle;

the floating body is of a hollow structure and comprises a first body, a second body and a third body which are sequentially connected, wherein the second body is slidably matched with the accommodating cavity along the vertical direction, the first body is connected to one end, close to the vacuum suction nozzle, of the second body, and the shape of the first body is matched with that of the vacuum suction nozzle so as to be attached to the vacuum suction nozzle; the third body is connected to one end of the second body, which is far away from the vacuum suction nozzle, and is in point contact with the bottom point of the container.

2. The gas path protection device according to claim 1, wherein the first body, the second body and the third body are all hollow structures, and the opening sizes of the first body towards one end of the second body and the third body towards one end of the second body are increased.

3. The gas path protection device according to claim 1, wherein the first body, the second body and the third body are made of plastic materials and are welded, bonded or screwed together.

4. The gas path protection device of claim 1, wherein the first body, the second body and the third body are all of a solid of revolution structure.

5. The gas path protection device according to claim 1, wherein at least one gas guide groove is formed in an inner side wall of the container, and the gas guide groove extends upward from the bottom of the accommodating cavity along a vertical direction.

6. The gas circuit protection device according to any one of claims 1 to 5, wherein an end of the vacuum suction nozzle near the floating body is horn-shaped, and an end of the first body near the vacuum suction nozzle is cone-shaped or spherical.

7. The gas path protection device according to any one of claims 1 to 5, wherein the second body is hollow cylindrical and/or the third body is hollow hemispherical.

8. The air passage protection device as claimed in any one of claims 1 to 5, wherein the accommodating cavity, the floating body and the vacuum suction nozzle are coaxially arranged.

9. The air passage protection device as claimed in any one of claims 1 to 5, wherein the accommodating cavity comprises a limiting cavity and a transition cavity located above the limiting cavity, the diameter of the transition cavity is larger than that of the limiting cavity, the vacuum suction nozzle is located in the transition cavity, and the floating body is in sliding fit with the limiting cavity.

10. An air path system, characterized by that, include air supply, pressure regulating unit, stock solution container and according to claim 1-9 any one the air path protection device, the air supply through the pressure regulating unit with first joint connection, stock solution container with second joint connection.

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