Filter with one-way valve and injection system pipeline

Abstract

The utility model discloses a filter with a one-way valve and an injection system pipeline, which comprise a filter and a one-way valve, and the filter is provided with a first channel; the one-way valve is provided with a second channel and connected with the filter, and the first channel communicates with the second channel; the one-way valve comprises a valve body, a supporting piece and an elastic stopping piece, the valve body is provided with a second channel, and the valve body is connected with the filter; the supporting piece is arranged at the inlet end of the valve body, the elastic stopping piece is connected to the end, away from the valve body, of the supporting piece, the elastic stopping piece abuts against the filter and blocks a first channel of the filter, and the peripheral size of the elastic stopping piece is larger than that of the first channel. The part, located on the periphery of the supporting piece, of the elastic stopping piece is pressed to deform towards the valve body so that the first channel can communicate with the second channel. According to the technical scheme, the problems that filters and one-way valves need to be installed one by one in an existing injection system pipeline, and operation is troublesome are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a filter with a one-way valve and an injection system pipeline. Background Art

[0002] In the traditional injection system pipeline, a filter is provided to filter the liquid medicine to be injected into the body, and a one-way valve is also provided to allow the liquid medicine to pass in one direction and prevent the blood in the body of the infusion subject from flowing back into the injection pipeline.

[0003] When it is necessary to install a filter and a one-way valve, it is usually necessary to install the filter and the one-way valve one by one in the injection system pipeline, which requires two connections and is troublesome to operate. Utility Model Content

[0004] The main purpose of the utility model is to provide a filter with a one-way valve and an injection system pipeline, aiming to solve the problem that the existing installation of filters and one-way valves in the injection system pipeline requires installation one by one, which is relatively troublesome.

[0005] To achieve the above-mentioned purpose, the utility model proposes a filter with a one-way valve, comprising: a filter, the filter having a first channel; and a one-way valve, the one-way valve having a second channel, the one-way valve being connected to the filter, and the first channel being connected to the second channel; wherein the one-way valve comprises a valve body, a support member and an elastic stop member, the valve body having the second channel, and the valve body being connected to the filter; the support member is arranged at the inlet end of the valve body, the elastic stop member is connected to an end of the support member away from the valve body, the elastic stop member abuts against the filter and blocks the first channel of the filter, the outer circumferential size of the elastic stop member is larger than the outer circumferential size of the first channel, and when the fluid flows through the first channel through the elastic stop member, the part of the elastic stop member located at the periphery of the support member is pressed and deformed toward the valve body to achieve the connection between the first channel and the second channel.

[0006] In one embodiment of the utility model, the inner wall of the filter close to the valve body is provided with a supporting step protruding outward, the outer wall of the elastic stopper is fitted to the outer wall of the supporting step, and the end face of the elastic stopper is fitted to the end face of the supporting step to block the first channel.

[0007] In an embodiment of the utility model, a plurality of abutting blocks are protruding from the side wall of the abutting step, and the plurality of abutting blocks are circumferentially spaced along the side wall of the abutting step, and the outer wall of the elastic stopper is in contact with the abutting blocks.

[0008] In one embodiment of the utility model, one end of the support member is connected to the middle of the inlet end of the valve body and is located above the first channel, and the other end of the support member is connected to the middle of the elastic stop member and is used to support the elastic stop member to block the first channel.

[0009] In an embodiment of the utility model, a plurality of protrusions are convexly provided on the end surface of the inlet end of the valve body, and the plurality of protrusions are arranged at intervals on the outer circumference of the first channel, and the protrusions are used to support the elastic stopper after being deformed under pressure.

[0010] In one embodiment of the utility model, the outer wall of the valve body is recessed inwardly with a connecting step, the valve body extends into the filter, the end face of the filter is connected to the end face of the connecting step, and the inner wall of the filter is connected to the outer wall of the valve body.

[0011] In an embodiment of the present invention, the filter and the connecting step of the one-way valve are connected by ultrasonic welding.

[0012] In one embodiment of the utility model, the filter includes an upper cover, a filter screen and a lower cover, the first channel is formed between the upper cover and the lower cover, the lower cover is connected to the valve body, the elastic stopper is abutted against the lower cover, the filter screen is arranged between the upper cover and the lower cover, and covers the first channel laterally.

[0013] In an embodiment of the present invention, a supporting grille is provided in the first channel of the lower cover.

[0014] The utility model also provides an injection system pipeline, comprising the filter with a one-way valve as mentioned above.

[0015] Compared with the prior art, the filter with a one-way valve and the injection system pipeline provided by the utility model have the following beneficial effects:

[0016] The technical solution of the utility model connects the filter and the one-way valve into an integrated structure. When in use, the filter with the one-way valve can be directly connected to the injection system pipeline for use without the need to install them one by one, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0018] Figure 1This is a schematic diagram of the overall structure of an embodiment of a filter with a one-way valve of the utility model;

[0019] Figure 2 This is one of the exploded schematic diagrams of an embodiment of a filter with a one-way valve of the utility model;

[0020] Figure 3 This is the second exploded schematic diagram of an embodiment of a filter with a one-way valve of the utility model;

[0021] Figure 4 It is a cross-sectional view of an embodiment of a filter with a one-way valve of the utility model.

[0022] Description of Figure Numbers:

[0023] Label name Label name 100 Filter with check valve 162 Support bulge 10 Filters 20 Check valve 11 First Channel 21 Second channel 12 Supporting steps 22 Valve body 13 Support block 221 Bump 14 Upper cover 222 Connecting steps 15 Filter 23 Support 16 Lower cover 24 Elastic stopper 161 Support grille

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Please refer to Figures 1 to 4The utility model provides a filter 100 with a one-way valve, comprising: a filter 10, the filter 10 having a first channel 11; and a one-way valve 20, the one-way valve 20 having a second channel 21, the one-way valve 20 is connected to the filter 10, and the first channel 11 is communicated with the second channel 21; wherein the one-way valve 20 comprises a valve body 22, a support member 23 and an elastic stopper 24, the valve body 22 having the second channel 21, the valve body 22 being connected to the filter 10; the support member 23 is disposed at the inlet of the valve body 22 At the mouth end, the elastic stopper 24 is connected to one end of the support member 23 away from the valve body 22, the elastic stopper 24 abuts against the filter 10 and blocks the first channel 11 of the filter 10, the outer circumferential dimension of the elastic stopper 24 is larger than the outer circumferential dimension of the first channel 11, when the fluid flows through the first channel 11 through the elastic stopper 24, the part of the elastic stopper 24 located outside the support member 23 is pressed and deformed toward the valve body 22, so as to realize the connection between the first channel 11 and the second channel 21.

[0029] Specifically, the one-way valve 20 is connected to the filter 10. The filter 10 is used to filter the liquid. The one-way valve 20 is used to allow the liquid to pass through in one direction and prevent backflow. The filter 10 and the one-way valve 20 are connected into an integrated structure. When in use, the filter 100 with the one-way valve can be directly connected to the injection system pipeline for use.

[0030] A first channel 11 is formed in the filter 10, and a second channel 21 is formed in the one-way valve 20, and the first channel 11 is connected with the second channel 21. The one-way valve 20 includes a valve body 22, a support member 23 and an elastic stopper 24. The valve body 22 has a second channel 21 for connecting with the first channel 11 of the filter 10, and the support member 23 and the elastic stopper 24 are used to control the connection between the first channel 11 and the second channel 21. The support member 23 is used to support the elastic stopper 24, and the elastic stopper 24 is used to block the first channel 11. When the one-way valve 20 is in a static state, the elastic stopper 24 always blocks the first channel 11 under the action of the support member 23; when the liquid flows from the filter 10 to the one-way valve 20, the liquid flows through the first channel 11, and the part of the elastic stopper 24 located outside the support member 23 is compressed, and the elastic stopper 24 is deformed toward the valve body 22, so that the first channel 11 is connected with the second channel 21, and the liquid can pass smoothly.

[0031] When the liquid flows in the reverse direction, the elastic stopper 24 will overlap on the end face of the filter 10 by pressure, and the first channel 11 will be continuously blocked, thereby cutting off the flow and preventing backflow.

[0032] The elastic stopper 24 is elastic and can be deformed under pressure, and the support member 23 can provide support for the elastic stopper 24, so the elastic stopper 24 located at the periphery of the support member 23 will be deformed under pressure, and the elastic stopper 24 will be partially disengaged from the first channel 11, thereby realizing the connection between the first channel 11 and the second channel 21.

[0033] like Figure 4 The elastic stopper 24 is pressed against the end face of the filter 10, and the outer circumferential dimension of the elastic stopper 24 is larger than the outer circumferential dimension of the first channel 11. The liquid can pass through in one direction, but when the liquid flows in the opposite direction, the elastic stopper 24 will be pressed against the end face of the filter 10 and continue to be blocked.

[0034] When in use, the end of the filter 10 away from the one-way valve 20 is connected to the input direction of the injection system pipeline, and the outlet end of the valve body 22 of the one-way valve 20 is connected to the output direction of the injection system pipeline, thereby realizing the infusion direction from the filter 10 to the one-way valve 20, first filtering the liquid medicine, and then making the liquid medicine flow out in one direction, and preventing the liquid medicine or blood from flowing back. The filter 100 with a one-way valve is connected to the injection system pipeline. During the injection or inhalation process, it can not only filter the latex particles in the liquid medicine, but also prevent the liquid from flowing back. The filter 10 and the one-way valve 20 are connected as a whole, and the installation and disassembly are relatively convenient.

[0035] The technical solution of the utility model connects the filter 10 and the one-way valve 20 into an integrated structure. When in use, the filter 100 with the one-way valve can be directly connected to the injection system pipeline for use without having to install them one by one, and the operation is simple and convenient.

[0036] In one embodiment of the utility model, the inner wall of the filter 10 close to the valve body 22 is provided with a supporting step 12 protruding outward, the outer wall of the elastic stopper 24 is fitted against the outer wall of the supporting step 12, and the end face of the elastic stopper 24 is fitted against the end face of the supporting step 12 to seal the first channel 11.

[0037] In detail, the elastic stopper 24 abuts against the end surface of the filter 10 to prevent the liquid from flowing back. The elastic stopper 24 can abut against the end surface of the filter 10, or a supporting step 12 can be set in the filter 10. Figure 3 and Figure 4 A support step 12 is provided in the first channel 11 of the filter 10 for placing the elastic member to facilitate blocking the first channel 11. The circumferential dimension of the elastic stopper 24 is larger than the circumferential dimension of the first channel 11 to facilitate unidirectional passage of liquid. The support step 12 is provided to facilitate positioning and installation of the elastic stopper 24.

[0038] In an embodiment of the utility model, a plurality of abutting blocks 13 are protruding from the side wall of the abutting step 12 , and the plurality of abutting blocks 13 are circumferentially spaced along the side wall of the abutting step 12 , and the outer wall of the elastic stopper 24 is in contact with the abutting blocks 13 .

[0039] Specifically, a plurality of abutting blocks 13 are protruding from the side wall of the abutting step 12, and the outer wall of the elastic stopper 24 is attached to the abutting block 13. When the liquid flows from the first channel 11 to the elastic stopper 24, the outer periphery of the elastic stopper 24 is pressurized to elastically deform toward the valve body 22, and the end face of the elastic stopper 24 is disengaged from the end face of the abutting step 12. At this time, flow channels are formed between adjacent abutting blocks 13 for liquid to pass through, so that the liquid can pass through better, and the elastic stopper 24 can better control the connection between the first channel 11 and the second channel 21.

[0040] In one embodiment of the utility model, one end of the support member 23 is connected to the middle of the inlet end of the valve body 22 and is located above the first channel 11, and the other end of the support member 23 is connected to the middle of the elastic stop member 24 and is used to support the elastic stop member 24 to block the first channel 11.

[0041] It is worth noting that the support member 23 is connected to the inlet end of the valve body 22, and the inlet end of the valve body 22 is the end connected to the filter 10. Figure 2 and Figure 4 The support member 23 is mounted in the middle of the inlet end of the valve body 22, so that the support member 23 is connected to the middle of the elastic stop member 24, so that the liquid squeezes the edge of the elastic stop member 24 and passes through the outer periphery of the elastic stop member 24, which facilitates the one-way flow of the liquid.

[0042] In this embodiment, the elastic stopper 24 is an elastic gasket with good elasticity. It can automatically adjust its shape as the liquid pressure changes to achieve the purpose of blocking the liquid when it passes through or flows in the reverse direction. The elastic gasket can withstand a certain pressure at the abutment step 12 and has good load-bearing capacity.

[0043] In an embodiment of the utility model, a plurality of protrusions 221 are convexly provided on the end surface of the inlet end of the valve body 22. The plurality of protrusions 221 are spaced apart on the outer periphery of the first channel 11. The protrusions 221 are used to support the elastic stopper 24 after being deformed under pressure.

[0044] It is worth noting that a plurality of protrusions 221 are convexly provided on the end face of the inlet end of the valve body 22, and the plurality of protrusions 221 are arranged at intervals on the periphery of the first channel 11. When the elastic stopper 24 is pressurized, the periphery of the elastic stopper 24 is deformed toward the valve body 22. The protrusions 221 can support the periphery of the elastic stopper 24 to prevent the elastic support member 23 from blocking the second channel 21 under the action of liquid pressure.

[0045] In one embodiment of the utility model, the outer wall of the valve body 22 is recessed inwardly with a connecting step 222, the valve body 22 extends into the filter 10, the end face of the filter 10 is connected to the end face of the connecting step 222, and the inner wall of the filter 10 is connected to the outer wall of the valve body 22.

[0046] In detail, a connecting step 222 is also provided on the outer wall of the valve body 22 close to the filter 10. The valve body 22 is extended into the filter 10 so that the filter 10 is supported on the connecting step 222, which facilitates the positioning of the connection between the filter 10 and the one-way valve 20, making the connection more convenient and increasing the contact area, thereby making the connection between the one-way valve 20 and the filter 10 more stable.

[0047] In an embodiment of the present invention, the filter 10 and the connecting step 222 of the one-way valve 20 are connected by ultrasonic welding.

[0048] It is worth noting that there are many ways to connect the one-way valve 20 and the filter 10, which can be glue bonding, inverted connection, or bolt connection. The specific method can be selected according to actual needs.

[0049] In this embodiment, ultrasonic welding is used to connect the one-way valve 20 and the filter 10. The ultrasonic welding effect is strong, so that the one-way valve 20 and the filter 10 form a whole. The connection is very strong, the sealing is good, and it is not easy to crack or leak.

[0050] In an embodiment of the present utility model, the filter 10 includes an upper cover 14, a filter screen 15 and a lower cover 16, the first channel 11 is formed between the upper cover 14 and the lower cover 16, the lower cover 16 is connected to the valve body 22, the elastic stopper 24 is abutted against the lower cover 16, the filter screen 15 is arranged between the upper cover 14 and the lower cover 16, and covers the first channel 11 in the horizontal direction.

[0051] In detail, the filter 10 includes an upper cover 14, a filter screen 15 and a lower cover 16. The upper cover 14 and the lower cover 16 cooperate to form a first channel 11. The filter screen 15 is arranged between the upper cover 14 and the lower cover 16, and laterally covers the middle of the first channel 11. The medicinal liquid flowing through the first channel 11 needs to be filtered through the filter screen 15. The filter screen 15 can filter the latex particles in the medicinal liquid, thereby ensuring the reliability of the infusion and the health and safety of the users to be infused.

[0052] The lower cover 16 is connected to the valve body 22, and the elastic stopper 24 abuts against the end surface of the lower cover 16 to block the first channel 11 of the lower cover 16. There are many ways and structures for connecting the upper cover 14 and the lower cover 16, such as point glue bonding, undercut connection, and ultrasonic welding connection. The specific way can be selected according to actual needs.

[0053] In an embodiment of the present invention, a support grille 161 is disposed in the first channel 11 of the lower cover 16 .

[0054] Specifically, a support grid 161 is provided in the first channel 11 of the lower cover 16 to support the filter 15. When liquid flows from the upper cover 14 into the filter 15, it will impact the filter 15. Figure 2 A support protrusion 162 is provided between the upper cover 14 and the lower cover 16 to support the filter screen 15; a support grid 161 is also provided to prevent the middle of the filter screen 15 from being sunken and blocking the first channel 11 of the lower cover 16, so that the liquid can flow out of the first channel 11 of the lower cover 16 after being filtered. Figure 2 and Figure 3 The support grille 161 is set as a cross-shaped support grille 161, which can better support the filter screen 15.

[0055] The utility model further provides an injection system pipeline (not shown), comprising the filter 100 with a one-way valve as described above.

[0056] Specifically, the injection system pipeline includes multiple types, such as high-pressure syringes, disposable infusion sets, etc. The filter 100 with a one-way valve can be directly installed on the injection system pipeline. It has the functions of filtering and preventing backflow, is easy to operate, does not need to be installed one by one, and is relatively convenient to install and disassemble.

[0057] The specific structure of the filter 100 with a one-way valve refers to the above embodiments. Since the injection system pipeline adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A filter with a one-way valve, characterized in that: include: A filter, wherein the filter has a first channel, an inner wall of the filter close to the valve body is provided with a support step protruding outward, a side wall of the support step is provided with a plurality of support blocks protruding, and the plurality of support blocks are arranged at intervals along the side wall of the support step in the circumferential direction; and a one-way valve, the one-way valve having a second channel, the one-way valve being connected to the filter, the first channel being in communication with the second channel; In which, the one-way valve comprises a valve body, a support member and an elastic stop member, the valve body has the second channel, and the valve body is connected to the filter; the support member is arranged at the inlet end of the valve body, the elastic stop member is connected to the end of the support member away from the valve body, the outer wall of the elastic stop member is fitted with the abutting block, and the end face of the elastic stop member is fitted with the end face of the abutting step to block the first channel of the filter, the outer circumferential size of the elastic stop member is larger than the outer circumferential size of the first channel, when the fluid flows through the elastic stop member from the first channel, the part of the elastic stop member located at the periphery of the support member is pressed and deformed toward the valve body to realize the connection between the first channel and the second channel; the end face of the inlet end of the valve body is convexly provided with a plurality of protrusions, and the plurality of protrusions are arranged at intervals on the outer periphery of the first channel, and the protrusions are used to support the elastic stop member after being deformed under pressure.

2. The filter with a one-way valve according to claim 1, characterized in that: One end of the support member is connected to the middle of the inlet end of the valve body and is located above the first channel, and the other end of the support member is connected to the middle of the elastic stop member and is used to support the elastic stop member to block the first channel.

3. The filter with a one-way valve according to claim 1, characterized in that: The outer wall of the valve body is inwardly recessed with a connecting step, the valve body extends into the filter, the end surface of the filter is connected to the end surface of the connecting step, and the inner wall of the filter is connected to the outer wall of the valve body.

4. The filter with a one-way valve according to claim 3, characterized in that: The filter is connected to the connecting step of the one-way valve by ultrasonic welding.

5. The filter with a one-way valve according to any one of claims 1 to 4, characterized in that: The filter includes an upper cover, a filter screen and a lower cover, the first channel is formed between the upper cover and the lower cover, the lower cover is connected to the valve body, the elastic stopper is abutted against the lower cover, the filter screen is arranged between the upper cover and the lower cover, and covers the first channel in the transverse direction.

6. The filter with a one-way valve according to claim 5, characterized in that: A supporting grille is provided in the first channel of the lower cover.

7. An injection system pipeline, characterized in that: The invention comprises a filter with a one-way valve as claimed in any one of claims 1 to 6.

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