Check valve and material conveying needle tube

Abstract

The utility model provides a check valve and a material conveying needle tube, the check valve comprises a valve body, an overflow chamber is formed in the valve body, and the top and the bottom of the valve body are respectively provided with a valve inlet and a valve outlet which are communicated with the overflow chamber; the multiple supporting rib plates are arranged in the overflowing cavity, and a floating cavity is formed between the multiple supporting rib plates and the top wall of the valve body; the floating sealing plate is movably arranged in the floating cavity to open or close the valve inlet; the floating sealing plate abuts against the top of the supporting rib plate to open the valve inlet in the state that materials are fed into the valve inlet, and the floating sealing plate abuts against the top wall of the valve body to close the valve inlet in the state that the materials at the valve outlet flow back. The check valve can solve the problems that an existing check valve in a needle tube is complex in structure, high in cost and difficult to miniaturize.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transportation, in particular to a check valve and a material transportation needle tube. Background Art

[0002] Sterile syringes are used in the transfer or delivery of liquid aseptic materials. Sterile syringes can be used in aseptic addition injection (ADI). ADI refers to an aseptic addition process system that uses online live bacteria addition equipment to efficiently add high-purity active probiotics to pasteurized heat-treated yogurt or flavored yogurt in a short time in a bacteria-free environment, thereby achieving the activity, uniformity, safety and other effects of the added bacteria in yogurt.

[0003] Conventional needle tubes are added by a single needle tube. When the material bag is replaced, the needle tube needs to be replaced, which leads to high replacement frequency, high cost, and high risk of contamination. At the same time, in order to prevent the backflow of liquid when the needle tube is in use, a check valve is usually provided on the needle tube. However, the structure of the check valve on the existing needle tube is relatively complex and the cost is high. Therefore, a check valve structure with a simple structure and relatively small volume needs to be designed on the needle tube. Utility Model Content

[0004] The utility model aims to provide a check valve and a material conveying needle tube, which can solve the problems of complex structure, high cost and difficulty in miniaturization of the check valve in the existing needle tube.

[0005] The above-mentioned purpose of the utility model is mainly achieved through the following technical means:

[0006] On the one hand, the utility model provides a check valve for replacing the check valve with a relatively complex structure in the existing needle tube, the check valve comprising:

[0007] A valve body having a flow chamber formed therein, wherein the top and bottom of the valve body respectively have a valve inlet and a valve outlet communicated with the flow chamber;

[0008] A plurality of supporting ribs are arranged in the flow chamber, and a floating chamber is formed between the plurality of supporting ribs and the top wall of the valve body;

[0009] a floating sealing plate, movably disposed in the floating chamber to open or close the valve inlet;

[0010] Wherein, when material flows through the valve inlet, the floating sealing plate abuts against the top of the supporting rib to open the valve inlet, and when material at the valve outlet flows back, the floating sealing plate abuts against the top wall of the valve body to close the valve inlet.

[0011] The check valve described in the utility model is provided with a supporting rib for floatingly supporting a floating sealing plate in the valve body, and the floating sealing plate is movably arranged between the supporting rib and the top wall of the valve body. When material enters from the valve inlet, the material will push the floating sealing plate to move downward until it abuts against the top of the supporting rib, and the material then passes through the floating chamber into the gap formed between the plurality of supporting ribs (the fan-shaped chamber described below), and then flows out through the valve outlet. When the pressure of the material at the valve outlet increases and produces a tendency to reflux, the material refluxed upward will lift up the floating sealing plate and make it abut against the top wall of the valve body, thereby closing the valve inlet and preventing the reflux of the material.

[0012] The check valve described in the utility model utilizes the characteristics of material backflow and achieves the function of preventing material backflow by only setting a floating sealing plate and a plurality of supporting ribs. It has a relatively simple structure and low cost, and can realize the miniaturization of the check valve, and can be used in pipes with relatively small diameters (millimeter level) of needle tubes.

[0013] In a preferred embodiment of the present invention, the plurality of support ribs are radially distributed with the center of the valve body as the center, and fan-shaped chambers are formed between any two adjacent support ribs, each of the fan-shaped chambers is connected to the valve outlet, and each of the fan-shaped chambers is connected to the floating chamber.

[0014] In this embodiment, a plurality of supporting ribs are arranged to be distributed radially, so as to facilitate the material to converge toward the center of the valve body, thereby facilitating the material to flow out from the valve outlet.

[0015] In a preferred embodiment of the present invention, each of the supporting ribs is connected to the side wall of the valve body at one end away from the center of the valve body, a flow channel connected to the valve outlet is formed between the ends of each of the supporting ribs close to the center of the valve body, and each of the fan-shaped chambers is connected to the flow channel.

[0016] In this embodiment, the supporting ribs are not connected at the center of the valve body, but are separated from each other by a certain distance, thereby forming a flow channel at the center of the valve body, and each fan-shaped chamber is connected to the flow channel, thereby accelerating the flow rate of the material in the check valve.

[0017] In a preferred embodiment of the present invention, the floating sealing plate is a circular plate, the diameter of the circular plate is larger than the diameter of the valve inlet, and the thickness of the circular plate is smaller than the height of the floating chamber.

[0018] In this embodiment, the diameter and thickness of the floating sealing plate are limited, so that the floating sealing plate can move up and down in the floating chamber and can seal the valve inlet.

[0019] In a preferred embodiment of the present invention, the floating sealing plate is a circular plate made of rubber material or silicone material.

[0020] In this embodiment, the floating sealing plate is made of rubber material or silicone material, so that the floating sealing plate has a certain elastic strain capacity, thereby improving the floating performance of the floating sealing plate.

[0021] On the other hand, the utility model also provides a material conveying needle tube, the material conveying needle tube comprising:

[0022] A plurality of branch pipes, one end of each branch pipe being connected to a material bag;

[0023] A main pipe, the other end of each branch pipe is connected to one end of the main pipe, the other end of the main pipe is connected to a needle, and the needle is inserted into the mixing bag;

[0024] Wherein, the main pipe is provided with a check valve as described above.

[0025] The material conveying needle tube described in the utility model can achieve the purpose of adding different materials in multiple material bags into a mixing bag for mixing simultaneously (or successively) through the design of multiple branch tubes and one main tube, avoiding the need to use multiple material conveying needle tubes.

[0026] The material conveying needle tube of the utility model has the check valve disposed on its main pipe, which can avoid backflow during the material mixing and conveying process.

[0027] In a preferred embodiment of the present invention, the valve inlet of the check valve is connected to one end of the main pipe close to the needle, and the valve outlet of the check valve is connected to the needle.

[0028] In this embodiment, the check valve is arranged between the main pipe and the needle, that is, the check valve is arranged at the outlet of the main pipe, so that the check valve can act on the entire main pipe.

[0029] In a preferred embodiment of the present invention, a needle clamp is provided on the main pipe and each branch pipe.

[0030] In this embodiment, the needle tube clamp can control the opening and closing of the main tube and each branch tube.

[0031] In a preferred embodiment of the present invention, the material bag has a discharge port, the discharge port is connected to a discharge port fixture, a sealing rubber pad is provided in the discharge port fixture, and one end of the branch pipe passes through the sealing rubber pad and is connected to the discharge port.

[0032] In this embodiment, a corresponding sealing rubber pad is provided at the discharge port, thereby preventing leakage from occurring during the process of connecting the branch pipe to the material bag.

[0033] In a preferred embodiment of the present invention, one end of the branch pipe connected to the material bag has a puncture head, and the puncture head can be clamped with the discharge port fixture and puncture the sealing pad to communicate with the discharge port.

[0034] In this embodiment, the connection between the branch pipe and the material bag is achieved by the mutual clamping of the piercing head and the material outlet, thereby avoiding contamination of the material in the material bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0036] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0037] Figure 1 This is a schematic diagram of the structure of the check valve of the utility model;

[0038] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0039] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction;

[0040] Figure 4 It is a structural schematic diagram of another embodiment of the supporting rib plate of the utility model;

[0041] Figure 5 This is a schematic diagram of the first state structure of the check valve of the utility model;

[0042] Figure 6 This is a schematic diagram of the second state structure of the check valve of the utility model;

[0043] Figure 7It is a structural schematic diagram of the material conveying needle tube described in the utility model.

[0044] Description of reference numerals:

[0045] 10. Valve body; 11. Valve inlet; 12. Valve outlet; 13. Flow chamber;

[0046] 20. Support ribs; 21. Fan-shaped chamber; 22. Flow passage;

[0047] 30. Floating sealing plate; 31. Floating chamber;

[0048] 100, branch pipe; 110, material bag; 111, discharge port; 112, discharge port fixture; 113, sealing rubber pad; 114, puncture head;

[0049] 200, main pipe; 210, check valve; 220, needle;

[0050] 300, needle clamp;

[0051] 400, tee connector. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0053] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0055] Implementation method 1:

[0056] like Figures 1 to 3 As shown, the utility model provides a check valve for replacing the check valve with a relatively complex structure in the existing needle tube, the check valve comprising: a valve body 10, an overflow chamber 13 is formed inside, the top and bottom of the valve body 10 are respectively provided with a valve inlet 11 and a valve outlet 12 which are connected to the overflow chamber 13; a plurality of supporting ribs 20 are arranged in the overflow chamber 13, a floating chamber 31 is formed in the overflow chamber 13 and between the plurality of supporting ribs 20 and the top wall of the valve body 10; a floating sealing plate 30 is movably arranged in the floating chamber 31 to open or close the valve inlet 11; wherein, in a state where the valve inlet 11 is passed with material, the floating sealing plate 30 abuts against the top of the supporting ribs 20 to open the valve inlet 11, and in a state where the material at the valve outlet 12 generates reflux, the floating sealing plate 30 abuts against the top wall of the valve body 10 to close the valve inlet 11.

[0057] The check valve described in the utility model is provided with a supporting rib 20 for floatingly supporting a floating sealing plate 30 in the valve body 10, and the floating sealing plate is movably arranged between the supporting rib 20 and the top wall of the valve body 10. When the material enters from the valve inlet 11, the material will push the floating sealing plate 30 to move downward until it abuts against the top of the supporting rib 20, and the material then enters the gap formed between the plurality of supporting ribs 20 (hereinafter referred to as the fan-shaped chamber 21) through the floating chamber 31, and then flows out through the valve outlet 12; when the pressure of the material at the valve outlet 12 increases and generates a tendency to reflux, the material refluxed upward will lift up the floating sealing plate 30, causing it to abut against the top wall of the valve body 10, thereby closing the valve inlet 11 and preventing the reflux of the material.

[0058] The check valve described in the utility model utilizes the characteristics of material backflow and realizes the function of preventing material backflow only through a floating sealing plate 30 and a plurality of supporting ribs 20. It has a relatively simple structure, low cost, and is easy to miniaturize the check valve, and can be used in pipes with relatively small diameters (millimeter level) of needle tubes.

[0059] The following will describe in detail the various structures of the check valve of the present invention, as well as the positions and connection relationships between the various structures.

[0060] First, if Figure 1 and Figure 2As shown, the valve body 10 is the outer shell structure of the check valve, which is a closed chamber. A flow chamber 13 is formed inside the valve body 10, and a valve inlet 11 and a valve outlet 12 are respectively provided on the upper and lower side walls opposite to each other. The material can enter the flow chamber 13 from the valve inlet 11 and can flow out from the valve outlet 12, and the material can only flow in one direction in the check valve (the principle of the check valve will be described in detail below); in this embodiment, the valve body 10 is a cylindrical barrel, and a cylindrical flow chamber 13 is formed inside it, and the valve inlet 11 and the valve outlet 12 are both circular openings. Of course, in other embodiments, the shape of the valve body 10 can be designed according to actual needs, and the shapes of the valve inlet 11 and the valve outlet 12 can also be designed to match the shape of the pipeline, which is not limited here.

[0061] Secondly, if Figure 1 and Figure 2 As shown, a plurality of supporting ribs 20 are arranged in the valve body 10. The supporting ribs 20 are arranged at the bottom of the valve body 10 and connected to the bottom wall of the valve body 10. The plurality of supporting ribs 20 have the same size and are radially distributed with the center of the valve body 10 as the center of the circle. Fan-shaped chambers 21 are formed in the flow chamber 13 and between two adjacent supporting ribs 20. Each fan-shaped chamber 21 is connected to the valve outlet 12.

[0062] The setting of the supporting rib 20 divides the flow chamber 13 in the valve body 10 into multiple fan-shaped chambers 21 and a floating chamber 31, wherein the floating chamber 31 is located above the supporting rib 20, that is, the columnar space formed between the top of the supporting rib 20 and the top wall of the valve body 10 is the floating chamber 31, and the floating chamber 31 is connected to each fan-shaped chamber 21, and the floating chamber 31 is connected to the valve inlet 11.

[0063] In this embodiment, the plurality of support ribs 20 are radially distributed, so that the material converges toward the center of the valve body 10, and then the material flows out of the valve outlet 12. Of course, in other embodiments, the distribution of the support ribs 20 can also be set to other types of arrangements, such as matrix arrangement, etc., which is not limited here.

[0064] Finally, a floating sealing plate 30 is movably arranged in the floating chamber 31 above the supporting rib 20. The floating sealing plate 30 is a circular plate matching the shape of the valve inlet 11. The diameter of the circular plate is larger than the diameter of the valve inlet 11, and the thickness of the circular plate is smaller than the height of the floating chamber 31. The thickness of the floating sealing plate 30 is set so that the floating sealing plate 30 can move up and down in the floating chamber 31 under the action of the material; the diameter of the floating sealing plate 30 is set to ensure that it can seal the valve inlet 11.

[0065] like Figure 5 and Figure 6As shown, the check valve described in the utility model has two different flow states:

[0066] First, if Figure 5 As shown, at this time, the check valve is in a forward flow state, and the material pressure at the valve inlet 11 is slightly greater than the material pressure at the valve outlet 12. The material enters the floating chamber 31 from the valve inlet 11. The floating sealing plate 30 in the floating chamber 31 floats downward under the action of the downward flowing material and abuts against the top of the supporting ribs 20. The material entering the floating chamber 31 continues to flow downward into the fan-shaped chamber 21 between the supporting ribs 20. The material entering the fan-shaped chamber 21 converges to the center of the valve body 10 and flows out from the valve outlet 12.

[0067] Secondly, if Figure 6 As shown, at this time, the check valve is in a state of blocking backflow, and the material pressure at the valve outlet 12 is slightly greater than the material pressure at the valve inlet 11. The material in the check valve has a tendency to flow in the opposite direction. The material flowing back from the valve outlet 12 can flow upward and act on the floating sealing plate 30, causing it to float upward and abut against the top of the valve body 10, thereby closing the valve inlet 11, and the material cannot continue to flow upward, thereby playing a role in blocking the backflow of the material.

[0068] The structure and technical effects of the preferred implementation of the check valve of the utility model will be further described below.

[0069] According to one embodiment of the present utility model, Figure 2 and Figure 3 As shown, one end of each supporting rib 20 away from the center of the valve body 10 is connected to the side wall of the valve body 10, and a flow channel 22 connected to the valve outlet 12 is formed between the ends of each supporting rib 20 close to the center of the valve body 10, and each fan-shaped chamber 21 is connected to the flow channel 22.

[0070] The supporting ribs 20 are not connected at the center of the valve body 10 (the supporting ribs 20 do not extend to the center of the valve body 10), but are separated from each other by a certain distance, thereby forming a flow channel 22 at the center of the valve body 10, and each fan-shaped chamber 21 is connected to the flow channel 22, thereby increasing the flow rate of the material in the check valve.

[0071] Of course, in other embodiments, such as Figure 4 As shown, the radially distributed supporting ribs 20 can also extend to the center of the valve body 10. At this time, the fan-shaped chamber 21 formed between the supporting ribs 20 is connected to the valve outlet 12 only through its bottom wall. Compared with the above embodiment, this arrangement will limit the forward flow rate of the material in the check valve.

[0072] According to an embodiment of the present invention, the floating sealing plate 30 is a circular plate made of rubber material or silicone material. The floating sealing plate 30 is made of rubber material or silicone material, so that the floating sealing plate 30 has a certain elastic strain capacity, thereby improving the floating performance of the floating sealing plate 30.

[0073] Implementation method 2:

[0074] like Figure 7 As shown, the utility model also provides a material conveying needle tube, which includes: a plurality of branch tubes 100, one end of each branch tube 100 is connected to a material bag 110; a main tube 200, the other end of each branch tube 100 is connected to one end of the main tube 200, the other end of the main tube 200 is connected to a needle 220, and the needle 220 is inserted into the mixing bag; wherein, the main tube 200 is provided with a check valve 210 as described in the first embodiment.

[0075] The material conveying needle tube described in the utility model, through the design of multiple branch tubes 100 and a main tube 200, can add different materials in multiple material bags 110 into a mixing bag for mixing at the same time (or successively), avoiding the need to use multiple material conveying needle tubes to perform material adding operations separately, thereby causing the problem of increased costs.

[0076] The material conveying needle tube of the utility model has a check valve 210 disposed on the main pipe 200, which can prevent backflow during the material mixing and conveying process.

[0077] Specifically, Figure 7 As shown, in this embodiment, the material delivery needle tube has two branch tubes 100, and the two branch tubes 100 are connected to the main tube 200 through a three-way joint 400; of course, more branch tubes 100 can be set according to actual needs, which is not limited here. The ends of the two branch tubes 100 away from the main tube 200 are connected to a material bag 110, and the materials in the two material bags 110 can enter the two branch tubes 100 respectively, and converge into the main tube 200 after passing through the three-way joint 400.

[0078] One end of the main pipe 200 away from the branch pipe 100 is connected to the valve inlet 11 of the check valve 210, and the valve outlet 12 of the check valve 210 is connected to the needle 220. The needle 220 can be inserted into the mixing bag, and the mixed liquid in the main pipe 200 enters the mixing bag after passing through the check valve 210 and the needle 220. The check valve 210 is arranged between the main pipe 200 and the needle 220, that is, the check valve 210 is arranged at the outlet of the main pipe 200, so that the check valve 210 can act on the entire main pipe 200.

[0079] According to one embodiment of the present utility model, Figure 7As shown, the main pipe 200 and each branch pipe 100 are provided with a needle tube clamp 300 ; the needle tube clamp 300 can control the opening and closing of the main pipe 200 and each branch pipe 100 .

[0080] According to one embodiment of the present utility model, Figure 7 As shown, the discharge port 111 is connected to a discharge port fixture 112, a sealing rubber pad 113 is arranged inside the discharge port fixture 112, and one end of the branch pipe 100 passes through the sealing rubber pad 113 and is connected to the discharge port 111. By arranging a corresponding sealing rubber pad 113 at the discharge port 111, leakage of the branch pipe 100 during the connection process with the material bag 110 is avoided.

[0081] Furthermore, one end of the branch pipe 100 connected to the material bag 110 has a puncture head 114, which can be clamped with the discharge port fixture 112 and puncture the sealing rubber pad 113 to communicate with the discharge port 111. The branch pipe 100 is connected to the material bag 110 by the mutual clamping of the puncture head 114 and the discharge port 111, thereby avoiding contamination of the material in the material bag 110.

[0082] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A check valve, characterized in that: include: A valve body having a flow chamber formed therein, wherein the top and bottom of the valve body respectively have a valve inlet and a valve outlet communicated with the flow chamber; A plurality of supporting ribs are arranged in the flow chamber, and a floating chamber is formed between the plurality of supporting ribs and the top wall of the valve body; a floating sealing plate, movably disposed in the floating chamber to open or close the valve inlet; Wherein, when material flows through the valve inlet, the floating sealing plate abuts against the top of the supporting rib to open the valve inlet, and when material at the valve outlet flows back, the floating sealing plate abuts against the top wall of the valve body to close the valve inlet.

2. The check valve according to claim 1, characterized in that: The plurality of support ribs are radially distributed with the center of the valve body as the center of the circle, and fan-shaped chambers are formed between two adjacent support ribs, each of the fan-shaped chambers is connected to the valve outlet, and each of the fan-shaped chambers is connected to the floating chamber.

3. The check valve according to claim 2, characterized in that: One end of each supporting rib away from the center of the valve body is connected to the side wall of the valve body, and a flow channel connected to the valve outlet is formed between the ends of each supporting rib close to the center of the valve body, and each fan-shaped chamber is connected to the flow channel.

4. The check valve according to claim 1, characterized in that: The floating sealing plate is a circular plate, the diameter of which is greater than the diameter of the valve inlet, and the thickness of which is less than the height of the floating chamber.

5. The check valve according to claim 1 or 4, characterized in that: The floating sealing plate is a circular plate made of rubber material or silicone material.

6. A material delivery needle tube, characterized in that: include: A plurality of branch pipes, one end of each branch pipe being connected to a material bag; A main pipe, the other end of each branch pipe is connected to one end of the main pipe, the other end of the main pipe is connected to a needle, and the needle is inserted into the mixing bag; Wherein, the main pipe is provided with a check valve as described in any one of claims 1-5.

7. The material delivery needle tube according to claim 6, characterized in that: The valve inlet of the check valve is connected to one end of the main pipe close to the needle, and the valve outlet of the check valve is connected to the needle.

8. The material delivery needle tube according to claim 6, characterized in that: The main pipe and each branch pipe are provided with a needle clamp.

9. The material delivery needle tube according to claim 6, characterized in that: The material bag has a discharge port, the discharge port is connected to a discharge port fixture, a sealing rubber pad is arranged in the discharge port fixture, and one end of the branch pipe passes through the sealing rubber pad and is connected to the discharge port.

10. The material delivery needle tube according to claim 9, characterized in that: One end of the branch pipe connected to the material bag is provided with a puncture head, and the puncture head can be clamped with the discharge port fixture and puncture the sealing rubber pad to communicate with the discharge port.

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