Filtering type one-way valve and injection system pipeline

Abstract

The utility model discloses a filtering type one-way valve and an injection system pipeline, and the filtering type one-way valve comprises a filter, a first valve element and a second valve element, the one-way valve is provided with a second channel; wherein the filter is connected with the one-way valve through ultrasonic welding, and the first channel is communicated with the second channel. According to the technical scheme, the problem that an existing filter and a one-way valve are not firmly connected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a filtering one-way valve and an injection system pipeline. Background Art

[0002] At present, a filter and a one-way valve are generally arranged in a liquid medicine injection system pipeline. The filter is used to filter the liquid medicine, and the one-way valve is used for the one-way passage of the liquid medicine and preventing blood from flowing back. The filter and the one-way valve are used in combination. When assembling the filter and the one-way valve, they are generally connected by bonding, which is prone to misassembly, and is likely to crack and leak during the infusion process, and the connection is unstable. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a filtering one-way valve and an injection system pipeline, aiming to solve the problem that the connection between the existing filter and the one-way valve is not firm.

[0004] To achieve the above purpose, the utility model provides a filtering one-way valve, including: a filter having a first channel; and a one-way valve having a second channel; wherein, the filter and the one-way valve are connected by ultrasonic welding, and the first channel is communicated with the second channel.

[0005] In an embodiment of the utility model, a connecting portion is convexly provided on the filter, a connecting groove is formed on the one-way valve, the connecting portion is inserted into the connecting groove, and the connecting portion and the connecting groove are connected by ultrasonic welding.

[0006] In an embodiment of the utility model, the connecting portion is a connecting pipe communicated with the first channel, the connecting groove is an annular groove, the connecting pipe is inserted into the annular groove and is connected with the annular groove by ultrasonic welding.

[0007] In an embodiment of the utility model, the one-way valve includes a fixing portion and a channel portion. The fixing portion includes an outer layer pipe body and an inner layer pipe body. The inner layer pipe body is communicated with the channel portion. The outer layer pipe body is arranged on the outer periphery of the inner layer pipe body and is spaced from the inner layer pipe body, and the annular groove is formed between the outer layer pipe body and the inner layer pipe body.

[0008] In an embodiment of the utility model, the end face of the inner layer pipe body is lower than the end face of the outer layer pipe body. The connecting pipe has a bottom wall, and the bottom wall of the connecting pipe protrudes from the wall surface of the filter located on the outer periphery of the connecting pipe and abuts against the end face of the inner layer pipe body, and the wall surface of the filter located on the outer periphery of the connecting pipe abuts against the end face of the outer layer pipe body.

[0009] In an embodiment of the present utility model, the filter includes an upper cover, a filter screen, and a lower cover. The lower cover is connected to the upper cover to form the first channel. The filter screen is disposed between the upper cover and the lower cover and covers the first channel transversely.

[0010] In an embodiment of the present utility model, a groove is formed on the end face of the upper cover facing the lower cover, and a positioning block protrudes from the end face of the lower cover facing the upper cover. The positioning block is inserted into the groove, and the positioning block and the groove are connected by ultrasonic welding.

[0011] In an embodiment of the present utility model, the groove is formed circumferentially around the end face of the upper cover, and the positioning block protrudes circumferentially around the end face of the lower cover.

[0012] In an embodiment of the present utility model, an undercut protrudes from the outer wall of the upper cover, and a clamping groove is formed on the inner wall of the lower cover. A part of the upper cover is located inside the lower cover, and the undercut is inserted into the clamping groove to connect the upper cover to the lower cover.

[0013] The present utility model also provides an injection system pipeline, including the above-mentioned filter type check valve.

[0014] Compared with the prior art, the filter type check valve and the injection system pipeline provided by the present utility model have the following beneficial effects:

[0015] In the technical solution of the present utility model, the filter and the check valve are connected by ultrasonic welding, and the welding strength is high, so that the connection between the filter and the check valve is relatively firm, not easy to crack and leak during use, and the connection is stable, making the filter type check valve more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the filter type check valve of the present utility model;

[0018] Figure 2 It is an exploded view of an embodiment of the filter type check valve of the present utility model;

[0019] Figure 3 It is an exploded view of another embodiment of the filter type check valve of the present utility model;

[0020] Figure 4 This is a cross-sectional view of an embodiment of the filtering check valve of the present utility model;

[0021] Figure 5 This is a cross-sectional view of another embodiment of the filtering check valve of the present utility model.

[0022] Explanation of the reference numerals in the drawings:

[0023] Label Name Label Name 100 Filter type check valve 151 Positioning block 1 Filter 152 Card slot 11 First channel 2 Check valve 12 Connection part 21 Second channel 121 Connecting pipe 22 Connection groove 13 Upper cover 23 Fixing part 131 Groove 231 Outer layer pipe body 132 Inverted buckle 232 Inner layer pipe body 133 Sealing ring 24 Channel part 14 Filter screen 25 Valve core 15 Lower cover

[0024] The realization of the object, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

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

[0027] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered 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 5 , the present utility model provides a filtering check valve 100, including: a filter 1, the filter 1 having a first channel 11; and a check valve 2, the check valve 2 having a second channel 21; wherein, the filter 1 and the check valve 2 are connected by ultrasonic welding, and the first channel 11 is communicated with the second channel 21.

[0029] Specifically, the filtering check valve 100 includes a filter 1 and a check valve 2. The first channel 11 of the filter 1 communicates with the second channel 21. The filter 1 and the check valve 2 are connected by ultrasonic welding. The ultrasonic welding effect is firm, making the filter 1 and the check valve 2 form an integral body, with a very firm connection and no damage to the part shape. The welding time required is short and the efficiency is high.

[0030] The filter 1 and the check valve 2 are connected by ultrasonic welding, with high welding strength, firm adhesion and good sealing performance. During use, the connection is tight, not easy to crack and not easy to leak. The solder joints are beautiful, and seamless welding of the filter 1 and the check valve 2 can be achieved.

[0031] The connection structure of the filter 1 and the check valve 2 can be set according to actual needs. Connection interfaces can be set on the filter 1 or the check valve 2, and then connected by ultrasonic welding, or the filter 1 and the check valve 2 can be directly welded together.

[0032] In the technical solution of the present utility model, the filter 1 and the check valve 2 are connected by ultrasonic welding, with high welding strength, making the connection between the filter 1 and the check valve 2 relatively firm. During use, it is not easy to crack and leak, and the connection is stable, making the filtering check valve 100 more reliable.

[0033] In an embodiment of the present utility model, a connecting portion 12 protrudes from the filter 1, a connecting groove 22 is formed in the check valve 2, the connecting portion 12 is inserted into the connecting groove 22, and the connecting portion 12 and the connecting groove 22 are connected by ultrasonic welding.

[0034] Specifically, a connecting portion 12 protrudes from the filter 1. By inserting the connecting portion 12 into the connecting groove 22 and connecting the connecting portion 12 and the connecting groove 22 by ultrasonic welding, on the one hand, the installation position of the filter 1 is positioned during connection, facilitating the mating connection between the filter 1 and the check valve 2, and on the other hand, the contact area can be increased, making the connection between the filter 1 and the check valve 2 more firm.

[0035] In an embodiment of the present utility model, the connecting portion 12 is a connecting pipe 121, the connecting pipe 121 communicates with the first channel 11, the connecting groove 22 is an annular groove, the connecting pipe 121 is inserted into the annular groove, and is connected to the annular groove by ultrasonic welding.

[0036] Specifically, the specific structures of the connecting portion 12 and the connecting groove 22 can be designed according to the actual situation. It can be set as the cooperation of a connecting block and a notch, or as the cooperation of an annular block and an annular groove. In this embodiment, the connecting portion 12 is set as a connecting pipe 121. The connecting pipe 121 is connected to the filter 1, and the connecting pipe 121 is communicated with the first channel 11. At the same time, the connecting groove 22 is set as an annular groove. By inserting the connecting pipe 121 into the connecting groove 22, it is convenient to position the connecting pipe 121 and increase the contact area. The connecting pipe 121 and the annular groove are connected by ultrasonic welding, making the connection between the connecting pipe 121 and the annular groove more firm, and the connection between the filter 1 and the one-way valve 2 more stable and convenient.

[0037] In an embodiment of the present utility model, the one-way valve 2 includes a fixing portion 23 and a channel portion 24. The fixing portion 23 includes an outer layer tube body 231 and an inner layer tube body 232. The inner layer tube body 232 is communicated with the channel portion 24. The outer layer tube body 231 is arranged on the outer periphery of the inner layer tube body 232 and is spaced from the inner layer tube body 232. An annular groove is formed between the outer layer tube body 231 and the inner layer tube body 232.

[0038] It should be noted that the one-way valve 2 includes a fixing portion 23 and a channel portion 24. The fixing portion 23 and the channel portion 24 are communicated. The fixing portion 23 is used to cooperate with the connecting pipe 121, and the channel portion 24 is used to connect with an injection pipeline. A valve core 25 is further arranged inside the fixing portion 23. The valve core 25 cooperates with the filter 1, and the valve core 25 is used to allow liquid to pass through unidirectionally.

[0039] Such as Figure 2 , the fixing portion 23 includes an outer layer tube body 231 and an inner layer tube body 232. The inner layer tube body 232 is communicated with the channel portion 24. The outer layer tube body 231 is arranged on the outer periphery of the inner layer tube body 232 and is spaced from the inner layer tube body 232. Therefore, an annular groove is formed between the outer layer tube body 231 and the inner layer tube body 232 for the connecting pipe 121 to be inserted and connected.

[0040] When the filter 1 is connected to the one-way valve 2, the connecting pipe 121 is directly inserted into the annular groove of the fixing portion 23 and connected by ultrasonic welding, which is more convenient for connection and improves the connection strength and connection stability.

[0041] In an embodiment of the present utility model, the end face of the inner layer tube body 232 is lower than the end face of the outer layer tube body 231. The connecting pipe 121 has a bottom wall. The bottom wall of the connecting pipe 121 protrudes from the wall surface of the filter 1 located on the outer periphery of the connecting pipe 121. The bottom wall of the connecting pipe 121 abuts against the end face of the inner layer tube body 232, and the wall surface of the filter 1 located on the outer periphery of the connecting pipe 121 abuts against the end face of the outer layer tube body 231.

[0042] Specifically, as shown in Figure 4 , the end face of the inner tube body 232 is set lower than the end face of the outer tube body 231. At the same time, the connecting tube 121 has a bottom wall inside, and the bottom wall of the connecting tube 121 protrudes from the surface of the filter 1 located on the outer periphery of the connecting tube 121. Therefore, when the connecting tube 121 is inserted into the connecting groove 22, the bottom wall of the connecting tube 121 abuts against the end face of the inner tube body 232, and the wall surface of the filter 1 located on the outer periphery of the connecting tube 121 abuts against the end face of the outer tube body 231, which is convenient for positioning the connecting tube 121 and for connecting the connecting tube 121 to the connecting groove 22.

[0043] Therefore, the connection between the first channel 11 and the second channel 21 can be staggered from the external space, preventing liquid leakage during use and making the connection more stable and firm.

[0044] In an embodiment of the present utility model, the filter 1 includes an upper cover 13, a filter net 14, and a lower cover 15. The lower cover 15 is connected to the upper cover 13 to form the first channel 11. The filter net 14 is disposed between the upper cover 13 and the lower cover 15 and laterally covers the first channel 11.

[0045] Specifically, the filter 1 includes an upper cover 13, a filter net 14, and a lower cover 15. The upper cover 13 and the lower cover 15 cooperate to form the first channel 11. The filter net 14 is disposed between the upper cover 13 and the lower cover 15 and laterally covers the middle of the first channel 11. The liquid medicine flowing through the first channel 11 needs to pass through the filter net 14 for filtration. The filter net 14 can filter the latex particles in the liquid medicine, thereby ensuring the reliability of the infusion and the health and safety of the user to be infused.

[0046] In an embodiment of the present utility model, a groove 131 is formed on the end face of the upper cover 13 facing the lower cover 15, and a positioning block 151 protrudes from the end face of the lower cover 15 facing the upper cover 13. The positioning block 151 is inserted into the groove 131, and the positioning block 151 and the groove 131 are connected by ultrasonic welding.

[0047] Specifically, a groove 131 is formed on the end face of the upper cover 13 facing the lower cover 15, and a positioning block 151 protrudes from the end face of the lower cover 15 facing the upper cover 13. The positioning block 151 is inserted into the groove 131, and the positioning block 151 and the groove 131 are connected by ultrasonic welding, which is convenient for connection. Connecting the upper cover 13 and the lower cover 15 together by ultrasonic welding can withstand the pressure during use, is not easy to crack, has a firm and stable connection, high welding strength, and good sealing performance, and is not easy to leak during use.

[0048] In an embodiment of the present utility model, the groove 131 is circumferentially formed around the end face of the upper cover 13, and the positioning block 151 is circumferentially protruded around the end face of the lower cover 15.

[0049] It should be noted that the groove 131 is arranged as an annular groove, and the positioning block 151 is arranged as an annular positioning block 151, which is convenient for connection. At the same time, it can improve the sealing performance between the upper cover 13 and the lower cover 15 of the filter 1, prevent leakage, increase the contact area, improve the connection strength, and make the connection more firm.

[0050] In an embodiment of the present utility model, an inverted buckle 132 is convexly provided on the outer wall of the upper cover 13, a clamping groove 152 is provided on the inner wall of the lower cover 15, a part of the upper cover 13 is located inside the lower cover 15, and the inverted buckle 132 is inserted into the clamping groove 152 to connect the upper cover 13 to the lower cover 15.

[0051] Specifically, there are various connection methods between the upper cover 13 and the lower cover 15. Glue bonding or bolt connection can be adopted, and the specific method can be selected according to actual needs. In an embodiment, as Figure 3 and Figure 5 , an inverted buckle 132 is provided on a part of the upper cover 13, a clamping groove 152 is provided on a part of the lower cover 15, and the upper cover 13 is partially inserted into the lower cover 15, that is, the inverted buckle 132 is inserted into the clamping groove 152 to connect the upper cover 13 to the lower cover 15.

[0052] That is to say, the upper cover 13 and the lower cover 15 are connected by the inverted buckle 132. They are connected together and can withstand the pressure during use. The connection is firm. The connection method by the inverted buckle 132 can make the upper cover 13 and the lower cover 15 firmly bite together, not easy to loosen, have good load-bearing capacity, and do not require screws, have strong stability and are not easy to deform. At the same time, as Figure 3 , a sealing ring 133 is provided at the position where the inverted buckle 132 is connected, which can seal the connection between the upper cover 13 and the lower cover 15 and is convenient for use.

[0053] The present utility model also provides an injection system pipeline, including the above-mentioned filter type check valve 100.

[0054] Specifically, there are various injection system pipelines, such as high-pressure injectors, disposable infusion sets, etc. The filter type check valve 100 can be directly installed in the injection system pipeline. The filter 1 and the check valve 2 are firmly connected, not easy to crack and leak during use, the connection is stable, and the use is more reliable.

[0055] For the specific structure of the filter type check valve 100, reference can be made to the above-mentioned embodiments. Since the injection system pipeline adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0056] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A filter type one-way valve, characterized in that: include: A filter, wherein the filter has a first channel, and a connecting pipe communicating with the first channel is convexly provided on the filter; as well as A one-way valve, wherein the one-way valve has a second channel, the one-way valve comprises a fixing portion and a channel portion, the fixing portion comprises an outer tube body and an inner tube body, the inner tube body is connected to the channel portion, the outer tube body is arranged on the outer periphery of the inner tube body and is spaced from the inner tube body, a connecting groove is formed between the outer tube body and the inner tube body, and the connecting groove is an annular groove; Wherein, the connecting pipe is inserted into the annular groove and connected to the annular groove by ultrasonic welding, so that the first channel is connected with the second channel.

2. The filter-type one-way valve according to claim 1, characterized in that: The end face of the inner tube body is lower than the end face of the outer tube body, and the connecting tube has a bottom wall, which protrudes from the wall surface of the filter located on the outer periphery of the connecting tube, and the bottom wall of the connecting tube abuts against the end face of the inner tube body, and the wall surface of the filter located on the outer periphery of the connecting tube abuts against the end face of the outer tube body.

3. The filter-type one-way valve according to any one of claims 1 and 2, characterized in that: The filter comprises an upper cover, a filter screen and a lower cover, wherein the lower cover is connected to the upper cover and forms the first channel, and the filter screen is arranged between the upper cover and the lower cover and covers the first channel in a transverse direction.

4. The filter-type one-way valve according to claim 3, characterized in that: The upper cover has an end surface facing the lower cover with a groove, the lower cover has an end surface facing the upper cover with a positioning block protruding therefrom, the positioning block is inserted into the groove, and the positioning block is connected to the groove by ultrasonic welding.

5. The filter-type one-way valve according to claim 4, characterized in that: The groove is opened around the circumference of the end surface of the upper cover, and the positioning block is protruded around the circumference of the end surface of the lower cover.

6. The filter-type one-way valve according to claim 3, characterized in that: The outer wall of the upper cover is convexly provided with an undercut, the inner wall of the lower cover is provided with a slot, the upper cover is partially located inside the lower cover, and the undercut is inserted into the slot to connect the upper cover to the lower cover.

7. An injection system pipeline, characterized in that: A filter-type one-way valve comprising the filter-type one-way valve according to any one of claims 1 to 6.

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