Joint for dry powder bag

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a joint for a dry powder bag, which comprises a joint, a water inlet and a water outlet are respectively arranged on two sides of the joint, the joint comprises a joint cover and a joint seat, a first water inlet area and a first water outlet area are arranged in the joint cover, a second water inlet area and a second water outlet area are arranged in the joint seat, and the first water inlet area and the second water outlet area are communicated with each other. After the connector cover and the connector base are combined into a whole, the first water inlet area and the second water inlet area are buckled to form an independent water inlet area, the first water outlet area and the second water outlet area are buckled to form an independent water outlet area, a water inlet through hole is formed in the second water inlet area, a filter element is arranged in the water inlet through hole, and a water outlet through hole is formed in the filter element. The joint adopts two injection molding parts, namely a joint cover and a joint seat, which are welded through hot melting welding. After welding, sealing is good, and the whole structure is firm and firm.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a connector for dry powder bags. Background Technology

[0002] Existing dialysis dry powder bags consist of a flexible bag body and a connector at the end of the flexible bag body. The connector has a filling port in the middle, with an inlet and an outlet on either side of the filling port. The connector allows for controlled and rapid online preparation of dialysis concentrate by passing the dialysis solution through the filler. The concentrated dry powder is then poured into the bag body through the filling port and sealed with a film. This manufacturing method requires sealing the connector after the dry powder is filled, typically using a specific instrument that matches the shape of the connector. This results in high production costs and low efficiency. Furthermore, the sealing film has poor strength and is easily punctured, causing leakage of liquid or powder.

[0003] The flexible bag's sidewall connects to a connector, which communicates with the interior of the flexible bag. This means the connector can be sealed even without filling the flexible bag with dry powder. During manufacturing, the flexible bag and the sealed connector can be produced directly, and then dry powder is filled through the opening of the flexible bag. Since the opening is made of flexible bag material, it can be directly sealed using ultrasonic or heat fusion sealing. However, the connector end face is sealed with a thin film heat fusion seal, which is easily punctured, causing leakage of liquid or powder. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a connector for dry powder bags, solving the aforementioned technical problems and achieving good sealing after welding. The overall structure is robust and sturdy, easy to store, transport, and use, and not easily damaged.

[0005] This utility model provides the following technical solution: a connector for dry powder bags, comprising a connector, with an inlet and an outlet on each side of the connector, the connector comprising a connector cover and a connector seat, the connector cover having a first inlet area and a first outlet area, the connector seat having a second inlet area and a second outlet area, when the connector cover and the connector seat are combined into one unit, the first inlet area and the second inlet area are engaged to form an independent inlet area, the first outlet area and the second outlet area are engaged to form an independent outlet area, the second inlet area having an inlet through hole, and a filter element being disposed within the inlet through hole.

[0006] The water inlet is connected to the inside of the dry powder bag through the water inlet area, and the water outlet is connected to the inside of the dry powder bag through the water outlet area.

[0007] The above technical solution uses two injection-molded parts, a connector cap and a connector seat, which are welded together by hot melt welding. The welded part has a good seal and the overall structure is sturdy and strong. It does not require multiple separate seals. The dialysate enters the water inlet area through the water inlet and then enters the dry powder bag. The dialysate prepared in the bag enters the water outlet area and then enters the dialysis equipment through the water outlet for easy use in the next step.

[0008] The water inlet hole includes an upper inlet hole and a lower recessed hole. The diameter of the inlet hole is larger than the diameter of the recessed hole, and the filter element and the recessed hole are interference-fitted.

[0009] The inlet port is for introducing the dialysate from the inlet area into the dry powder bag, and together with the filter cartridge below, it plays a certain buffering role. The filter cartridge acts as a one-way valve, ensuring that the dialysate coming in through the inlet can pass through the filter cartridge into the dry powder bag. Neither the large-molecule dry powder in the dry powder bag nor the dialysate prepared inside the dry powder bag (at this point, the dialysate and dry powder have been mixed and prepared) can pass through the filter cartridge and return to the inlet area.

[0010] The connector cover has a first welding surface, and the connector seat has a second welding surface. The first welding surface of the connector cover and the second welding surface of the connector seat are fused together. Then the two parts are aligned, and the connector cover and connector seat are fused and fixed into a single connector.

[0011] The connector seat is also provided with an overflow groove, which is adjacent to the second welding surface. The bottom of the overflow groove is lower than the second welding surface, and the highest point of the outer wall of the overflow groove is higher than the second welding surface, so as to ensure that excess overflow fills the overflow groove during the fusion process.

[0012] The above technical solution involves inserting the filter element into the recessed hole on the inlet port, while simultaneously heating the first welding surface of the connector cap and the second welding surface of the connector seat to melt the two welding surfaces. Afterwards, the two parts are aligned and allowed to cool, fusing and fixing them into a single connector. During the fusion process, excess material fills the overflow trough, preventing overflow from accumulating on the outer wall of the connector and affecting the outer tube, reducing welding burrs and flash, and preventing hand injuries.

[0013] The water outlet area is provided with a water outlet hole, which connects to the inside of the dry powder bag.

[0014] The connector seat has a welding bag area at the end near the dry powder bag, and the welding bag area is a disc.

[0015] The dry powder bag has a joint welding area on its body that corresponds to the bag welding area. After the bag welding area and the joint welding area are aligned, the dry powder bag and the joint are fixedly connected by hot melting welding.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model discloses a connector for dry powder bags. The connector consists of two injection-molded parts: a connector cap and a connector seat, which are welded together using hot-melt welding. The weld provides a good seal, and the overall structure is robust and sturdy. The filter element ensures that the dialysate entering through the inlet can pass through the filter element into the dry powder bag. Neither the large-molecule dry powder nor the dialysate already mixed with the dry powder within the dry powder bag can pass through the filter element and return to the inlet area. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the exploded structure of a connector for a dry powder bag according to a specific embodiment 1 of this utility model;

[0019] Figure 2 This is a top view of the connector seat of a connector for a dry powder bag, according to a specific embodiment 1 of this utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the connector seat AA of a connector for a dry powder bag according to a specific embodiment 1 of this utility model;

[0021] Figure 4 This is a bottom view of the connector cap structure of a connector for a dry powder bag according to a specific embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the connector cap BB of a connector for a dry powder bag according to a specific embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the installation structure of a connector for a dry powder bag when used in conjunction with a dry powder bag, according to a specific embodiment of the present invention.

[0024] In the picture:

[0025] 1-Connector seat; 11-Inlet; 12-Outlet; 13-Second inlet zone; 14-Second outlet zone; 15-Overflow trough;

[0026] 16-Welding bag area; 17-Second welding surface; 18-Water inlet hole; 19-Water outlet hole;

[0027] 2-Connector cover; 21-First welding surface; 22-First water inlet area; 23-First water outlet area;

[0028] 3-Filter element; 4-Dry powder bag body; 41-Bag body welding area; 42-Joint welding area; 43-Dry powder filling port. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Specific Implementation Example 1: Please refer to Figure 1-6 A connector for a dry powder bag is provided. Considering that the dialysis dry powder is a "bicarbonate" preparation, the dry powder bag body 4 and the connector are made of PP (polypropylene) material to ensure the stability of the contained material and prevent it from reacting with the dry powder. Considering the characteristics of PP material, hot-melt welding is considered to be used between the bag body and the connector, and between the connector seat 1 and the connector cap 2.

[0031] A connector for dry powder bags includes a connector with an inlet 11 and an outlet 12 on both sides. The connector includes an upper connector cover 2 and a lower connector seat 1. The connector cover 2 has a first water inlet area 22 and a first water outlet area 23. The connector seat 1 has a second water inlet area 13 and a second water outlet area 14. When the connector cover 2 and the connector seat 1 are combined into one unit, the first water inlet area 22 and the second water inlet area 13 are engaged to form an independent water inlet area, and the first water outlet area 23 and the second water outlet area 14 are engaged to form an independent water outlet area. The inlet 11 communicates with the inside of the dry powder bag through the water inlet area, and the outlet 12 communicates with the inside of the dry powder bag through the water outlet area.

[0032] The second water inlet zone 13 is provided with a water inlet through-hole 18, and a filter element 3 is installed inside the water inlet through-hole 18. The water inlet through-hole 18 includes an upper inlet hole and a lower recessed hole. The diameter of the inlet hole is larger than the diameter of the recessed hole, and the filter element 3 and the recessed hole are interference-fitted. The inlet hole is used to guide the dialysate from the water inlet zone into the dry powder bag, and together with the filter element 3 below, it plays a certain buffering role. The filter element 3 acts as a one-way valve, ensuring that the dialysate entering from the water inlet 11 can pass through the filter element 3 into the dry powder bag. The large-molecule dry powder in the dry powder bag and the dialysate prepared in the dry powder bag body 4 (at this time, the dialysate has been mixed with the dry powder) cannot pass through the filter element 3 and return to the water inlet zone.

[0033] The connector consists of two injection-molded parts, connector cover 2 and connector seat 1, which are welded together by hot melt welding. The welded part has a good seal and the overall structure is sturdy and strong. There is no need to use multiple seals. The dialysate enters the water inlet area through the water inlet 11 and then enters the dry powder bag body 4. The dialysate prepared in the bag body enters the water outlet area and enters the dialysis equipment through the water outlet 12 for convenient use in the next step.

[0034] The connector cover 2 has a first welding surface 21 inside, and the connector seat 1 has a second welding surface 17 inside. The first welding surface 21 of the connector cover 2 and the second welding surface 17 of the connector seat 1 are fused together. Then the two parts are aligned and the connector cover 2 and the connector seat 1 are fused and fixed into a single connector.

[0035] The connector 1 is also provided with an overflow trough 15, such as Figure 3 As shown, the overflow trough 15 is adjacent to the second welding surface 17, and the bottom of the overflow trough 15 is lower than the second welding surface 17. The highest point of the outer wall of the overflow trough 15 is higher than the second welding surface 17, ensuring that excess overflow fills the overflow trough 15 during the fusion process.

[0036] Insert the filter element 3 into the recess on the water inlet hole 18, and simultaneously heat the first welding surface 21 of the connector cover 2 and the second welding surface 17 of the connector seat 1 to melt the two welding surfaces. Then align the two parts and wait for them to cool, so that the two parts are fused and fixed into one connector. During the fusion process, excess overflow fills the overflow trough 15, which can prevent overflow from accumulating on the outer wall of the connector, affecting the outer tube of the connector, reducing welding burrs and flash, and preventing cuts.

[0037] The water outlet area is equipped with a water outlet hole 19, which connects to the inside of the dry powder bag.

[0038] The connector 1 has a bag welding area 16 at the end near the dry powder bag, which is a disc.

[0039] The dry powder bag has a joint welding area 42 on its body that corresponds to the welding bag area 16. After the welding bag area 16 and the joint welding area 42 are aligned, the dry powder bag and the joint are fixedly connected by hot melting welding.

[0040] like Figure 1 , Figure 2 , Figure 4 First, insert the filter element 3 into the recessed hole on the water inlet hole 18. Then, simultaneously heat the second welding surface 17 of the connector seat 1 and the first welding surface 21 of the connector cover 2 to melt the two welding surfaces. After that, align the two parts and wait for them to cool, so that the two parts are fused and fixed into one connector. During the fusion process, excess overflow fills the overflow trough 15, which can prevent overflow from accumulating on the outer wall of the connector, affecting the outer tube of the connector, reducing welding burrs and flash, and preventing cuts.

[0041] After the above steps are completed, an independent inlet area is formed by the interlocking of the first inlet area 22 and the second inlet area 13; and an independent outlet area is formed by the interlocking of the first outlet area 23 and the second outlet area 14. The dialysis fluid enters the inlet area of ​​the connector through the inlet 11, is filtered by the filter element 3, and enters the dry powder bag body 4 through the inlet hole 18; the dialysis fluid prepared in the bag body enters the outlet area of ​​the connector through the outlet hole 19, and enters the dialysis equipment through the outlet 12 for further use.

[0042] like Figure 6 The dry powder bag body 4 is welded along the bag body welding area 41, with a dry powder filling port 43 reserved at one end. The disc where the joint welding bag area 16 is located is inserted into the reserved opening on one side of the dry powder bag body 4. Then, the welding bag area 16 on the joint seat 1 is aligned with the joint welding area 42 on the dry powder bag body 4, and then it is firmly welded by hot melting.

[0043] When filling with dry powder, pour the dry powder into the pre-reserved dry powder filling port 43 on the dry powder bag body 4, and then heat-seal the two layers of the bag body. The connector seat and connector cover in this utility model have a sturdy structure that is not easily damaged, the connector is easy to form, and the bag body can be mass-produced; this is beneficial to improving processing efficiency. It meets the installation and fixing requirements of special equipment and can form separate water inlet and outlet areas.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connector for dry powder bags, comprising a connector, wherein an inlet and an outlet are respectively provided on both sides of the connector, characterized in that, The connector includes a connector cover and a connector seat. The connector cover has a first water inlet area and a first water outlet area. The connector seat has a second water inlet area and a second water outlet area. When the connector cover and the connector seat are combined into one unit, the first water inlet area and the second water inlet area are engaged to form an independent water inlet area. The first water outlet area and the second water outlet area are engaged to form an independent water outlet area. The second water inlet area has a water inlet through hole, and a filter element is installed in the water inlet through hole.

2. The connector for a dry powder bag according to claim 1, characterized in that: The water inlet is connected to the inside of the dry powder bag through the water inlet area, and the water outlet is connected to the inside of the dry powder bag through the water outlet area.

3. The connector for a dry powder bag according to claim 2, characterized in that: The water inlet hole includes an upper inlet hole and a lower recessed hole. The diameter of the inlet hole is larger than the diameter of the recessed hole, and the filter element and the recessed hole are interference-fitted.

4. The connector for a dry powder bag according to claim 1, characterized in that: The connector cover has a first welding surface, and the connector seat has a second welding surface. The first welding surface of the connector cover and the second welding surface of the connector seat are fused together. Then the two parts are aligned, and the connector cover and connector seat are fused and fixed into a single connector.

5. A connector for a dry powder bag according to claim 4, characterized in that: The connector seat is also provided with an overflow groove, which is adjacent to the second welding surface. The bottom of the overflow groove is lower than the second welding surface, and the highest point of the outer wall of the overflow groove is higher than the second welding surface.

6. A connector for a dry powder bag according to claim 1, characterized in that: The water outlet area is provided with a water outlet hole, which connects to the inside of the dry powder bag.

7. A connector for a dry powder bag according to claim 1, characterized in that: The connector seat has a welding bag area at the end near the dry powder bag, and the welding bag area is a disc.

8. A connector for dry powder bags according to any one of claims 1-7, characterized in that: The dry powder bag has a joint welding area on its body that corresponds to the bag welding area. After the bag welding area and the joint welding area are aligned, the dry powder bag and the joint are fixedly connected by hot melting welding.

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