Filter with double one-way valves and injection system pipeline

Abstract

The utility model discloses a filter with double one-way valves and an injection system pipeline, which comprise a filter, a first one-way valve and a second one-way valve, the filter is provided with a first channel, the first one-way valve is provided with a second channel, the first one-way valve is connected to the outlet end of the filter, the first channel is communicated with the second channel, and the second one-way valve is provided with a third channel. The second one-way valve is connected to the side wall of the inlet end of the filter, and the third channel communicates with the first 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 double one-way valves and an injection system pipeline. Background Art

[0002] In the injection system pipeline, there are inlet pipeline, infusion pipeline and suction pipeline. One-way valves are usually set on the inlet pipeline and infusion pipeline to make one-way flow from the inlet pipeline to the suction pipeline and from the suction pipeline to the infusion pipeline to prevent liquid backflow, avoid cross-flow between the inlet pipeline and the infusion pipeline, and prevent the injection pipeline from being contaminated. At the same time, a filter will be set on the infusion pipeline to filter the liquid medicine, and the liquid medicine will be injected into the human body after filtering.

[0003] When installing the one-way valve and the filter, it is usually necessary to install the filter and the one-way valve one by one in the injection system pipeline, which requires installation three times, which is troublesome to operate and very inconvenient to use. Utility Model Content

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

[0005] To achieve the above-mentioned purpose, the utility model proposes a filter with double one-way valves, comprising: a filter, the filter having a first channel; a first one-way valve, the first one-way valve having a second channel, the first one-way valve being connected to the outlet end of the filter, and the first channel being communicated with the second channel; a second one-way valve, the second one-way valve having a third channel, the second one-way valve being connected to the side wall of the inlet end of the filter, and the third channel being communicated with the first channel.

[0006] In one embodiment of the utility model, the filter includes a filter body and a connecting pipe, the connecting pipe is connected to the inlet end of the filter body and communicates with the filter body, the first one-way valve is connected to the outlet end of the filter body, and the second one-way valve is connected to the side wall of the connecting pipe and communicates with the connecting pipe.

[0007] In one embodiment of the utility model, it also includes an intermediate piece, which is sleeved outside the connecting pipe, and the side wall of the connecting pipe is provided with a connecting port, the intermediate piece has an intermediate channel, the connecting port is connected to the intermediate channel, the second one-way valve is connected to the intermediate piece, and the intermediate channel is connected to the third channel.

[0008] In an embodiment of the present invention, the intermediate piece and the connecting pipe are integrally formed.

[0009] In one embodiment of the utility model, the second one-way valve includes a valve body and a valve core, so the valve body is connected to the middle piece, the valve core is arranged at the outlet end of the valve body, the valve core has an opening, and the opening is connected to the middle channel; a stopper is convexly provided at the outlet end of the valve body, and the stopper blocks the opening of the valve core. When the fluid flows through the valve core from the inlet end of the valve body, the valve core is pressed and moves toward the direction of the middle piece to realize the connection between the valve body and the middle channel.

[0010] In an embodiment of the present invention, a plurality of support blocks are protruded from the inner wall of the valve body toward the middle interval, and the outer wall of the stopper is connected to the plurality of support blocks.

[0011] In an embodiment of the present utility model, a connecting groove is concavely formed on the end surface of the intermediate piece close to the valve body, and the valve body is inserted into and connected to the connecting groove.

[0012] In an embodiment of the present invention, the valve body and the connecting groove are connected by ultrasonic welding.

[0013] In one embodiment of the utility model, an annular flange is protruding from the outlet end of the filter, an annular groove is formed in the first one-way valve, the annular flange is inserted into the annular groove, and the annular flange and the annular groove are connected by ultrasonic welding.

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

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

[0016] The technical solution of the utility model connects two one-way valves to the two ends of the filter respectively, and the infusion pipeline can be connected through the first one-way valve, the liquid inlet pipeline can be connected through the second one-way valve, and the suction pipeline can be connected through the inlet end of the filter. The filter is connected to the first one-way valve and the second one-way valve as a whole. When in use, it is only necessary to connect the three interfaces of the device to the injection system pipeline, and there is no need to install the filter and the one-way valve one by one, which reduces the installation steps, improves the installation efficiency, is simple to operate, and is very convenient to use. 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 1 This is a schematic diagram of the overall structure of an embodiment of a filter with double one-way valves of the utility model;

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

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

[0021] Figure 4 This is the third exploded schematic diagram of an embodiment of a filter with double one-way valves of the utility model;

[0022] Figure 5 This is a cross-sectional view of an embodiment of a filter with double one-way valves of the utility model;

[0023] Figure 6 This is the second cross-sectional view of an embodiment of a filter with double one-way valves according to the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 100 Filter with double check valve 22 Annular groove 10 Filters 23 Check valve body 11 First Channel 24 Check valve core 12 Filter body 30 Second check valve 121 Upper cover 31 Third Channel 122 Lower cover 32 Valve body 123 Filter 321 Stopper 13 Connecting pipe 322 Support block 131 Connecting port 33 Valve core 14 Annular flange 331 Opening 15 Blocking parts 40 middleware 20 First check valve 41 Middle Channel 21 Second channel 42 Connection slot

[0026] 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

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Please refer to Figures 1 to 6 The utility model proposes a filter 100 with a double one-way valve, comprising: a filter 10, wherein the filter 10 has a first channel 11; a first one-way valve 20, wherein the first one-way valve 20 has a second channel 21, wherein the first one-way valve 20 is connected to the outlet end of the filter 10, and the first channel 11 is communicated with the second channel 21; a second one-way valve 30, wherein the second one-way valve 30 has a third channel 31, wherein the second one-way valve 30 is connected to the side wall of the inlet end of the filter 10, and the third channel 31 is communicated with the first channel 11.

[0031] Specifically, two one-way valves are connected to the filter 10, the first one-way valve 20 is connected to the outlet end of the filter 10, and the second one-way valve 30 is connected to the side wall of the inlet end of the filter 10, that is, the filter 10 and the two one-way valves are connected as one body.

[0032] When in use, the filter 100 with double one-way valves is connected to the injection system pipeline, the first one-way valve 20 is connected to the infusion pipeline of the injection system pipeline, the second one-way valve 30 is connected to the inlet pipeline of the injection system pipeline, and the inlet end of the filter 10 is connected to the suction pipeline of the injection system pipeline; that is, by respectively arranging two one-way valves in opposite directions to the conduction direction of the suction pipeline on the inlet pipeline and the infusion pipeline, the inlet pipeline can be unidirectionally conducted to the suction pipeline, and the suction pipeline can be unidirectionally conducted to the infusion pipeline, thereby preventing liquid reflux in the injection system pipeline, avoiding cross-talk between the inlet pipeline and the infusion pipeline, and preventing the injection system from being contaminated.

[0033] The technical solution of the utility model connects two one-way valves to the two ends of the filter 10 respectively, and the infusion pipeline can be connected through the first one-way valve 20, the liquid inlet pipeline can be connected through the second one-way valve 30, and the suction pipeline can be connected through the inlet end of the filter 10. The filter 10 is connected with the first one-way valve 20 and the second one-way valve 30 as a whole. When in use, it is only necessary to connect the three interfaces of the device to the injection system pipeline, and there is no need to install the filter 10 and the one-way valve one by one, which reduces the installation steps, improves the installation efficiency, is simple to operate, and is very convenient to use.

[0034] The filter 100 with a double one-way valve is connected to the injection system pipeline. When aspirating medicine, the medicine liquid or nutrient solution is connected to the liquid inlet pipeline, and the syringe or other liquid aspiration structure is connected to the liquid aspiration pipeline to provide suction, so that the medicine liquid or nutrient solution is aspirated through the second one-way valve 30, and the medicine liquid or nutrient solution flows into the liquid aspiration pipeline, or can flow into the syringe.

[0035] During infusion, the medicine or nutrient solution flows through the suction line to the infusion line and is injected into the human body or animal body, etc. The first one-way valve 20 allows the fluid to be unidirectionally conducted from the suction line to the infusion line, which not only prevents the medicine or nutrient solution from directly flowing out of the infusion line during inhalation, but also prevents the fluid in the infusion line from flowing back to the suction line, thereby avoiding cross-flow of the fluid; the filter 10 can filter the fluid guided to the infusion line, and the filter 10 can filter the latex particles in the medicine, thereby ensuring the reliability of the infusion and the health and safety of the person to be infused.

[0036] In one embodiment of the utility model, the filter 10 includes a filter body 12 and a connecting pipe 13, the connecting pipe 13 is connected to the inlet end of the filter body 12 and communicates with the filter body 12, the first one-way valve 20 is connected to the outlet end of the filter body 12, and the second one-way valve 30 is connected to the side wall of the connecting pipe 13 and communicates with the connecting pipe 13.

[0037] In detail, a connecting pipe 13 is arranged at the inlet end of the filter body 12, and the connecting pipe 13 is extended in a direction away from the filter body 12. By setting the connecting pipe 13, it is convenient to connect the second one-way valve 30 to the side wall of the connecting pipe 13 so that the third channel 31 is connected to the first channel 11.

[0038] The first one-way valve 20 is connected to the outlet end of the filter body 12. The fluid first flows through the filter body 12, where the liquid medicine is filtered by the filter body 12, and then flows out of the first one-way valve 20 in one direction. The outlet end of the first one-way valve 20 is used to connect other instruments, such as a needle, etc., to prevent liquid backflow during the infusion process.

[0039] In addition, if Figure 5 The filter body 12 includes an upper cover 121, a lower cover 122 and a filter net 123. The upper cover 121 and the lower cover 122 cooperate to form the first channel 11. The filter net 123 is arranged between the upper cover 121 and the lower cover 122, and horizontally covers the middle of the first channel 11. The liquid medicine flowing through the first channel 11 needs to be filtered through the filter net 123. The filter net 123 can filter the latex particles in the liquid medicine, thereby ensuring the reliability of the infusion and the health and safety of the users to be infused.

[0040] In one embodiment of the utility model, it also includes an intermediate piece 40, which is sleeved outside the connecting pipe 13, and the side wall of the connecting pipe 13 is provided with a connecting port 131, and the intermediate piece 40 has an intermediate channel 41, and the connecting port 131 is connected to the intermediate channel 41, the second one-way valve 30 is connected to the intermediate piece 40, and the third channel 31 is connected to the intermediate channel 41.

[0041] It is worth noting that an intermediate piece 40 is also provided, and the intermediate piece 40 is fixed on the outside of the connecting pipe 13. A connecting port 131 is provided on the connecting pipe 13. The intermediate piece 40 is provided with an intermediate channel 41. The connecting port 131 is connected to the intermediate channel 41. The second one-way valve 30 is connected to the intermediate piece 40, so that the third channel 31 is connected to the intermediate channel 41. That is, by providing the intermediate piece 40, it is convenient to connect the second one-way valve 30, so that the third channel 31 is connected to the first channel 11.

[0042] The structure of the middleware 40 can be set according to actual needs. Figure 2 In this embodiment, a pipeline structure is provided, the connecting pipe 13 passes through the middle piece 40 along the radial direction of the middle piece 40, the middle piece 40 is covered on the outside of the connecting pipe 13, and a connecting port 131 is opened on the side wall of the connecting pipe 13, so that the first channel 11 is connected with the middle piece 40 and connected with the third channel 31.

[0043] In an embodiment of the present invention, the intermediate piece 40 and the connecting pipe 13 are integrally formed.

[0044] In detail, the middle piece 40 is wrapped around the outside of the connecting pipe 13 and is integrally formed with the connecting pipe 13. On the one hand, the connection between the second one-way valve 30 and the connecting pipe 13 is more stable and the channel connection is more reliable. On the other hand, the middle piece 40 can increase the strength of the connecting pipe 13, making it easier for the connecting pipe 13 to be laterally connected to the second one-way valve 30.

[0045] In one embodiment of the utility model, the second one-way valve 30 includes a valve body 32 and a valve core 33, so the valve body 32 is connected to the middle piece 40, the valve core 33 is arranged at the outlet end of the valve body 32, the valve core 33 has an opening 331, and the opening 331 is connected to the middle channel 41; a stopper 321 is convexly provided at the outlet end of the valve body 32, and the stopper 321 blocks the opening 331 of the valve core 33, when the fluid flows through the valve core 33 from the inlet end of the valve body 32, the valve core 33 is pressed and moves toward the direction of the middle piece 40, so as to realize the communication between the valve body 32 and the middle channel 41.

[0046] Specifically, the second one-way valve 30 includes a valve body 32 and a valve core 33. When the second one-way valve 30 is in a static state, the opening 331 of the valve core 33 is always against the stopper 321 of the valve body 32, and the stopper 321 blocks the opening 331 of the valve core 33. When liquid is sucked, the fluid flows to the second one-way valve 30, and the valve core 33 is moved in a direction away from the valve body 32 by the pressure of the liquid. The stopper 321 is disconnected from the opening 331 of the valve core 33, and the opening 331 of the valve core 33 is communicated with the intermediate channel 41 and enters the first channel 11 through the communication port 131, so that the fluid can smoothly pass through the second one-way valve 30. When the liquid flows in the reverse direction, the valve core 33 is always against the stopper 321 of the valve body 32 by pressure, thereby cutting off the flow to achieve the effect of preventing backflow.

[0047] The valve core 33 can be connected by a spring, or the valve core 33 can be directly set as an elastic member. In this embodiment, the valve core 33 is an elastic member, and the wall surface of the valve core 33 located at the opening 331 can be elastically deformed directly in a direction away from the valve body 32 when subjected to pressure, so that the opening 331 is separated from the stopper 321; after the liquid pressure is released, the wall surface of the valve core 33 will return to a normal state and abut against the stopper 321.

[0048] In an embodiment of the present invention, a plurality of support blocks 322 are protruded from the inner wall of the valve body 32 toward the middle interval, and the outer wall of the stopper 321 is connected to the plurality of support blocks 322 .

[0049] It is worth noting that the inner wall of the valve body 32 is provided with a plurality of support blocks 322 protruding toward the middle, and the plurality of support blocks 322 are evenly spaced along the circumference of the valve body 32, and the stopper 321 is columnar, and the outer wall of the stopper 321 is connected to the plurality of support blocks 322, that is, the stopper 321 is supported by the support blocks 322, so that the stopper 321 is supported against the opening 331 of the valve core 33, and the liquid can pass through the gaps between the support blocks 322. The plurality of support blocks 322 support the stopper 321, so that the cooperation between the stopper 321 and the opening 331 of the valve core 33 can also be more stable.

[0050] In an embodiment of the present invention, a connection groove 42 is recessed on the end surface of the intermediate member 40 close to the valve body 32 , and the valve body 32 is inserted into and connected to the connection groove 42 .

[0051] In detail, by opening a connection groove 42 on the middle piece 40, one end of the valve body 32 can be directly inserted into the connection groove 42 for connection, which can not only position the installation of the valve body 32, but also make the connection between the valve body 32 and the middle piece 40 more stable.

[0052] In an embodiment of the present invention, the valve body 32 and the connecting groove 42 are connected by ultrasonic welding.

[0053] Specifically, there are many ways to connect the middle piece 40 and the valve body 32, such as glue point bonding, undercut connection, or bolt connection. The specific method can be selected according to actual needs. In this embodiment, ultrasonic welding is used to connect the valve body 32 and the connecting groove 42. The ultrasonic welding effect is strong, so that the middle piece 40 and the valve body 32 form a whole, the connection is very strong, the sealing is good, and it is not easy to crack or leak.

[0054] In one embodiment of the utility model, the outlet end of the filter 10 is provided with an annular flange 14, the first one-way valve 20 is provided with an annular groove 22, the annular flange 14 is inserted into the annular groove 22, and the annular flange 14 and the annular groove 22 are connected by ultrasonic welding.

[0055] In detail, the connection between the filter 10 and the first one-way valve 20 is carried out through the matching connection of the annular flange 14 and the annular groove 22, and is also connected by ultrasonic welding, so that the filter 10 and the first one-way valve 20 form a whole, and the connection is firm and tight, not easy to crack, and not easy to leak.

[0056] In addition, if Figure 4 The cooperation between the first one-way valve 20 and the filter 10 is similar to the cooperation between the middle piece 40 and the second one-way valve 30. The first one-way valve 20 also includes a one-way valve body 23 and a one-way valve core 24. A blocking member 15 is protrudingly provided at the outlet end of the filter 10 to cooperate with the flow port of the one-way valve core 24. The specific effect refers to the description of the cooperation between the middle piece 40 and the second one-way valve 30, which will not be repeated here.

[0057] At the same time, a connecting joint can be provided at the free end of the first one-way valve 20 to facilitate connection with other instruments. The connecting joint can be an inner conical locking joint or an outer conical locking joint, such as directly connecting the inner conical locking joint to the indwelling needle.

[0058] The utility model further provides an injection system pipeline (not shown), comprising the filter 100 with double one-way valves as described above.

[0059] Specifically, the injection system pipeline includes an inlet pipeline, an infusion pipeline, an aspiration pipeline and a filter 100 with a double one-way valve. The inlet pipeline is connected to the second one-way valve 30, the infusion pipeline is connected to the first one-way valve 20, and the aspiration pipeline is connected to the inlet end of the filter 10. The infusion pipeline can be an infusion tube with a needle, and the aspiration pipeline can be a pipe with a syringe. There are many types of injection system pipelines, such as repetitive pipelines, 24-hour pipelines, etc. The filter 100 with a double one-way valve can be directly installed in the injection system pipeline, so that the pipeline has the function of filtering and preventing backflow, and there is no need to install them one by one. Installation and disassembly are relatively convenient.

[0060] The specific structure of the filter 100 with double one-way valves 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.

[0061] 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 double one-way valves, characterized in that: include: A filter having a first channel, the filter comprising a filter body and a connecting pipe, the connecting pipe being connected to an inlet end of the filter body and communicating with the filter body; An intermediate piece, the intermediate piece is sleeved outside the connecting pipe, a connecting pipe has a side wall with a connecting port, the intermediate piece has an intermediate channel, and the connecting port is connected with the intermediate channel; a first one-way valve, the first one-way valve having a second channel, the first one-way valve being connected to the outlet end of the filter body, the first channel being in communication with the second channel; and a second one-way valve, the second one-way valve having a third passage, the second one-way valve comprising a valve body and a valve core, the valve body being connected to the middle piece, the valve core being arranged at the outlet end of the valve body, the valve core having an opening, the opening being communicated with the middle passage, the third passage being communicated with the first passage through the middle passage; a stopper is convexly provided at the outlet end of the valve body, the stopper blocks the opening of the valve core; When the fluid flows through the valve core from the inlet end of the valve body, the valve core is pressed to move toward the middle piece, so as to achieve communication between the valve body and the middle channel.

2. The filter with double check valves according to claim 1, characterized in that: The intermediate piece and the connecting pipe are integrally formed.

3. The filter with double check valves according to claim 1, characterized in that: The inner wall of the valve body is provided with a plurality of support blocks protruding toward the middle interval, and the outer wall of the stopper is connected to the plurality of support blocks.

4. The filter with double check valves according to claim 1, characterized in that: The end surface of the intermediate piece close to the valve body is concavely provided with a connecting groove, and the valve body is inserted into the connecting groove and connected with the connecting groove.

5. The filter with double check valves according to claim 4, characterized in that: The valve body is connected to the connecting groove by ultrasonic welding.

6. The filter with double check valves according to any one of claims 1 to 5, characterized in that: An annular flange is protruding from the outlet end of the filter, an annular groove is formed in the first one-way valve, the annular flange is inserted into the annular groove, and the annular flange and the annular groove are connected by ultrasonic welding.

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

Images