Apparatus for forming medical fluid bag

Abstract

An apparatus for forming a medical fluid bag is provided. The apparatus comprises: a welding device configured to weld a first film and a second film together to form a medical fluid bag; an energy transmission member configured to transmit high-frequency energy to the welding device; the shielding device comprises an upper sleeve and a lower sleeve; the lower sleeve is arranged inside or outside the upper sleeve and can move between a farthest position and a nearest position relative to the upper sleeve in the vertical direction; and a shielding sheet configured to surround at least a portion of an interface region between the lower sleeve and the upper sleeve, where the shielding sheet has a first end mechanically and electrically connected with the upper sleeve and a second end mechanically and electrically connected with the lower sleeve, the shielding sheet being deformable when the lower sleeve moves relative to the upper sleeve; wherein the lower sleeve is connected with the welding device, and the energy transmission part is arranged in the upper sleeve and the lower sleeve.

Description

Technical Field

[0001] The present application relates to industrial manufacturing equipment and, more particularly, to an apparatus for forming medical fluid bags. Background Art

[0002] In the prior art, medical solutions are pre-stored in medical fluid bags, and then the medical solutions in the medical fluid bags are applied to patients during treatment. Medical solutions can be any type of medical fluid, such as replacement fluid, dialysate and a solution containing a medicament (drug). Medical fluid bags can be made of polyvinyl chloride (PVC) materials or other suitable polymer materials that do not contain PVC. In a molding method of an existing medical fluid bag, two PVC sheets or polymer sheets that do not contain PVC are placed in a bag forming machine having an upper mold and a lower mold, and high-frequency energy is applied to the upper mold and the lower mold, and the two sheets between the upper mold and the lower mold are sealed together to form a medical fluid bag. However, this high-frequency energy may leak outside the bag forming machine, causing radiation hazards to the operator, or causing interference to other surrounding equipment.

[0003] Therefore, it is necessary to improve the bag forming machine to reduce high-frequency energy leakage. Summary of the invention

[0004] One of the objects of the present application is to provide an apparatus for forming a medical fluid bag, which can reduce the leakage of high-frequency energy.

[0005] According to one aspect of the present application, an apparatus for forming a medical fluid bag is provided. The device includes: a welding device, which is configured to weld a first film and a second film together to form a medical fluid bag; an energy transmission component, which is configured to transmit high-frequency energy to the welding device; and a shielding device, which includes: an upper sleeve; a lower sleeve, which is arranged inside or outside the upper sleeve and can move between a farthest position and a closest position relative to the upper sleeve in a vertical direction, wherein the farthest position is the position where the free end of the lower sleeve is farthest from the upper sleeve, and the closest position is the position where the free end of the lower sleeve is closest to the upper sleeve; and a shielding sheet, which is configured to surround at least a portion of the interface area between the lower sleeve and the upper sleeve, wherein the shielding sheet has a first end mechanically and electrically connected to the upper sleeve and a second end mechanically and electrically connected to the lower sleeve, and when the lower sleeve moves relative to the upper sleeve, the shielding sheet can be deformed; wherein the lower sleeve is connected to the welding device, and the energy transmission component is arranged inside the upper sleeve and the lower sleeve.

[0006] In some embodiments, the welding device includes: an upper mold, which is mechanically connected to the lower sleeve so as to move with the lower sleeve; and a lower mold, which is operably aligned with the upper mold, wherein the upper mold is capable of moving to a welding position relative to the lower mold, in which the upper mold and the lower mold squeeze the first film and the second film disposed therebetween, and weld the first film and the second film together using high-frequency energy transmitted by the energy transmission component.

[0007] In some embodiments, the first end of the shielding sheet is detachably connected to the upper sleeve via a first connection mechanism, and / or the second end of the shielding sheet is detachably connected to the lower sleeve via a second connection mechanism.

[0008] In some embodiments, the first connecting mechanism includes: a first fixing bracket, which is fixed to the upper sleeve; and a first pressure rod, which is installed on the first fixing bracket, wherein the first end of the shielding sheet is clamped between the first fixing bracket and the first pressure rod; and / or the second connecting mechanism includes: a second fixing bracket, which is fixed to the lower sleeve; and a second pressure rod, which is installed on the second fixing bracket, wherein the second end of the shielding sheet is clamped between the second fixing bracket and the second pressure rod.

[0009] In some embodiments, the first fixing bracket is fixed to the upper casing by welding, adhesive, screws, bolts or rivets; and / or the second fixing bracket is fixed to the lower casing by welding, adhesive, screws, bolts or rivets.

[0010] In some embodiments, the first pressure rod is mounted on the first fixing bracket by means of a clip, a screw, a bolt or a rivet; and / or the second pressure rod is mounted on the second fixing bracket by means of a clip, a screw, a bolt or a rivet.

[0011] In some embodiments, the first fixing bracket is an elongated member with an L-shaped cross section, which has a first handle fixed to the upper sleeve and a second handle for engaging the first pressure rod; and / or the second fixing bracket is an elongated member with an L-shaped cross section, which has a first handle fixed to the lower sleeve and a second handle for engaging the second pressure rod.

[0012] In some embodiments, along the circumference of the upper sleeve and the lower sleeve, the shielding sheet shields 80% to 100% of the interface area between the upper sleeve and the lower sleeve.

[0013] In some embodiments, the upper sleeve and the lower sleeve each have a rectangular cross-section.

[0014] In some embodiments, the shielding sheet includes four sub-portions, each sub-portion being connected to a corresponding side wall of the upper sleeve and a corresponding side wall of the lower sleeve.

[0015] In some embodiments, a ratio of a width of each sub-portion to a width of a corresponding side wall of the inner one of the upper and lower sleeves is in a range of 80% to 100%.

[0016] In some embodiments, the length L of the shielding sheet is equal to or greater than the distance D between a connection position of the shielding sheet on the lower sleeve and a connection position of the shielding sheet on the upper sleeve when the lower sleeve is at the farthest position.

[0017] In some embodiments, a ratio of a length L of the shielding sheet to a distance D between a connection position of the shielding sheet on the lower sleeve and a connection position on the upper sleeve when the lower sleeve is at the farthest position is in a range of 120% to 200%.

[0018] In some embodiments, the shielding sheet is made of a material including beryllium copper, or a material consisting of beryllium copper.

[0019] In some embodiments, the thickness of the shielding sheet is in the range of 0.08 mm to 2 mm.

[0020] In some embodiments, the thickness of the shielding sheet is in the range of 0.10 mm to 0.12 mm.

[0021] In some embodiments, the energy transmission component includes a radio frequency coaxial tube.

[0022] The above is an overview of the present application, which may be simplified, summarized, and omitted in detail. Those skilled in the art should recognize that this section is only illustrative and is not intended to limit the scope of the present application in any way. This summary section is neither intended to determine the key features or essential features of the claimed subject matter, nor is it intended to be used as an auxiliary means to determine the scope of the claimed subject matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Through the detailed description made below in conjunction with the accompanying drawings and the attached claims, those skilled in the art will more fully and clearly understand the above and other features of the present application. It is understood that these drawings and detailed descriptions only depict several exemplary embodiments of the present application and should not be considered as limiting the scope of the present application. By referring to the accompanying drawings, the content of the present application will be more clearly and detailed.

[0024] Figure 1A schematic diagram of a conventional comb-shaped shielding metal sheet is shown;

[0025] Figure 2 A schematic structural diagram of a medical fluid bag is shown;

[0026] Figure 3 A schematic structural diagram of a device for forming a medical fluid bag according to an embodiment of the present application is shown;

[0027] Figure 4 Shows Figure 3 Enlarged view of some parts in the middle. DETAILED DESCRIPTION

[0028] The following detailed description of exemplary embodiments of the present application refers to the accompanying drawings that form a part of the description. The accompanying drawings show specific exemplary embodiments in which the present application can be practiced. The detailed description, including the accompanying drawings, describes these embodiments in sufficient detail to enable those skilled in the art to practice the present application. Those skilled in the art may further utilize other embodiments of the present application and make logical, mechanical, etc. changes without departing from the spirit or scope of the present application. Therefore, readers of the following detailed description should not interpret the description in a restrictive manner, and only limit the scope of the embodiments of the present application with the appended claims.

[0029] In this application, unless otherwise expressly stated, the use of singular words shall also include the plural meaning. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "including" and other forms of expression such as "including" and "containing" are not restrictive. In addition, unless otherwise expressly stated, terms such as "element" or "component" cover elements and components including one unit, as well as elements and components including more than one subunit. In addition, the section headings used herein are for organizational purposes only and should not be interpreted as limiting the subject matter described.

[0030] As used herein, spatially relative terms, such as "below," "below," "above," "above," "up," "upper side," "lower side," "left side," "right side," "horizontal," "vertical," "edge," "longitudinal," "lateral," and the like, may be used herein to facilitate description of the relationship of one element or feature to another element or feature as shown in the accompanying drawings. In addition to the orientation depicted in the figures, spatially relative terms are intended to cover different orientations of the device in use or operation. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly. It should be understood that when an element is referred to as being "connected to" or "coupled to" another element, it may be directly connected to or coupled to the other element, or there may be intermediate elements.

[0031] In the prior art, in order to reduce the leakage of high-frequency energy in the bag forming machine, a metal shielding device is usually arranged around the energy transmission component that transmits high-frequency energy. Since the energy transmission component is connected to the upper mold of the welding device and moves up and down with the upper mold, the metal shielding device usually includes an upper sleeve and a lower sleeve that are sleeved on each other. During the bag welding process, the upper sleeve remains relatively fixed, while the lower sleeve is sleeved inside or outside the upper sleeve, and can move up and down relative to the upper sleeve with the upper mold of the welding device, so that the upper sleeve and the lower sleeve always keep shielding the energy transmission component. However, in order to allow smooth relative movement between the upper and lower sleeves, there is usually a gap between the upper sleeve and the lower sleeve, and high-frequency energy may escape from the gap, causing radiation leakage.

[0032] To this end, one solution is to set up a joint in the interface area between the upper casing and the lower casing. Figure 1 The comb-shaped shielding metal sheet 110 shown. For example, in the case where the upper sleeve is sleeved on the outside of the lower sleeve, the upper end of the metal sheet 110 is fixed to the outer surface of the lower end of the upper sleeve (not shown) by a fixing member, and the lower end of the metal sheet 110 with comb-shaped teeth is bent inward and abuts against the outer surface of the lower sleeve 120 (only a portion is shown). The metal sheet 110 can be made of, for example, a spring copper sheet. During the bag welding process, the lower mold moves up and down relative to the upper mold, but the lower end of the metal sheet 110 always abuts against the outer surface of the lower sleeve 120. The electric field shielding capability of the bag forming machine can be enhanced by further reflecting and absorbing the high-frequency energy escaping from between the upper sleeve and the lower sleeve by the metal sheet 110.

[0033] However, the inventors of the present application found that Figure 1 The comb-shaped shielding metal sheet 110 in the present invention still has defects. For example, the friction between the metal sheet 110 and the lower sleeve 120 may cause wear between the metal sheet 110 and the lower sleeve 120, and generate metal debris that may have a negative impact on the quality of the medical fluid bag (for example, the metal debris may fall into the medical fluid bag). In addition, after a period of use, the metal sheet 110 itself and the part of the plate that the lower sleeve 120 contacts with the metal sheet 110 will become thinner and thinner due to repeated friction with each other, and the metal sheet 110 may be deformed and unable to be tightly against the surface of the lower sleeve 120, thereby causing high-frequency energy to leak from the gap between the upper sleeve and the lower sleeve, which is likely to cause electric sparks near the bag forming machine, thereby affecting the safety of surrounding operators or equipment. Further, since the metal sheet 110 is easily worn, it needs to be replaced frequently (for example, 1-2 times a week), so the maintenance cost is high.

[0034] In order to solve at least one of the above problems, an apparatus for forming a medical fluid bag (or referred to as a "bag forming machine") is provided in an embodiment of the present application. The energy transmission component of the apparatus for transmitting high-frequency energy is surrounded by a shielding device, which includes an upper sleeve, a lower sleeve and a shielding sheet. The lower sleeve is sleeved inside or outside the upper sleeve and can move between a farthest position and a closest position relative to the upper sleeve in a vertical direction, and the shielding sheet is configured to surround at least a portion of the interface area between the lower sleeve and the upper sleeve. The first end of the shielding sheet in the embodiment of the present application is mechanically and electrically connected to the upper sleeve, and the second end is mechanically and electrically connected to the lower sleeve, and the shielding sheet can be deformed when the lower sleeve moves relative to the upper sleeve.

[0035] Since the two ends of the shielding sheet of the embodiment of the present application are respectively connected to the upper sleeve and the lower sleeve by mechanical means, when the lower sleeve moves up and down relative to the upper sleeve, the shielding sheet will not rub against the lower sleeve or the upper sleeve, which can effectively avoid the generation of metal debris. In addition, the shielding sheet is electrically connected to the upper sleeve and the lower sleeve, and the high-frequency energy leaked from the gap between the upper sleeve and the lower sleeve can be effectively reflected, absorbed and transmitted to the outside by the shielding sheet, which can effectively reduce the risk of electric sparks or high-frequency energy leakage. Furthermore, since there is no friction between the shielding sheet and the lower sleeve or the upper sleeve, the wear of the shielding sheet is reduced, and its replacement frequency is also greatly reduced, thereby reducing production costs.

[0036] refer to Figure 2 , which shows an exemplary structure of a medical fluid bag 200, which can be manufactured using a bag forming machine according to an embodiment of the present application. Figure 2 As shown, the medical fluid bag 200 includes a bag body 210, a filling tube 240, and a dosing tube 250 pre-sealed with a stopper 220. The filling tube 240 and the dosing tube 250 are attached to the bag body 210 and extend away from the bag body 210, and are separated by a welding area 270. One end of the filling tube 240 is attached to the end 280 of the bag body 210, and the other end is a free end 260, and the injection liquid can be poured into the bag body 210 through the opening at the free end 260. After a predetermined amount of injection liquid is poured into the medical fluid bag 200, the filling tube 240 is sealed with a sealing plug (not shown). Although Figure 2 The medical fluid bag 200 is shown to include two tubes, but those skilled in the art will appreciate that one tube or more than two tubes, such as three, four, five, or other different numbers of tubes, may be provided as required. In addition, the overall shape of the medical fluid bag 200 may also be appropriately changed as required, and is not limited to Figure 2 The roughly rectangular shape shown.

[0037] refer to Figure 3, which shows a schematic structural diagram of an apparatus 300 for forming a medical fluid bag according to an embodiment of the present application. For example, the apparatus 300 can form a welding area 270 of a medical fluid bag 200 and a welding area around a bag body 210 .

[0038] like Figure 3 As shown, the apparatus 300 includes a welding device 310 , an energy transmission component 320 , and a shielding device 330 .

[0039] Specifically, the welding device 310 is configured to weld two films (a first film and a second film, not shown) made of, for example, a polyvinyl chloride (PVC) material or a polymer material that does not contain PVC together to form a medical fluid bag. In some embodiments, the welding device 310 includes an upper mold 310a and a lower mold 310b. The upper mold 310a is operably aligned with the lower mold 310b. For example, the upper mold 310a can be moved to a welding position relative to the lower mold 310b under the drive of a driving device (e.g., a servo motor, a hydraulic cylinder, etc.). In the welding position, the upper mold 310a and the lower mold 310b squeeze the first film and the second film disposed therebetween, and the high-frequency energy transmitted by the energy transmission component 320 is used to weld the first film and the second film together to form a medical fluid bag.

[0040] In some embodiments, before the welding device 310 performs a welding operation, one or more tubes (e.g., Figure 2 The filling tube 240 and the dosing tube 250 shown are inserted between the first film and the second film; after the welding device 310 performs a welding operation, the one or more tubes are also welded and fixed between the first film and the second film to form the inlet and outlet of the fluid bag 200.

[0041] The energy transmission component 320 is configured to transmit high-frequency energy to the welding device 310. For example, the energy transmission component 320 is electrically coupled to the upper mold 310a and / or the lower mold 310b of the welding device 310. During the welding process, a high-frequency current is passed through the upper mold 310a and / or the lower mold 310b in the welding position, and the molecular polarity of the medical fluid bag film material is utilized to soften or even partially melt and squeeze the first and second films in contact with the upper mold 310a and the lower mold 310b under the high-frequency current, so that they are bonded together to form a sealed medical fluid bag.

[0042] In some embodiments, the energy transmission component 320 includes a radio frequency coaxial tube (or radio frequency coaxial cable), which generally has a coaxially arranged central conductor and an outer shielding layer, and is used to transmit radio frequency current (e.g., 27.12 MHz, etc.) to the upper mold 310a and / or the lower mold 310b of the welding device 310. The above-mentioned radio frequency coaxial tube can be purchased from the Italian company GEAFS.PA or other commercial companies. It can be understood that the present application is not limited to this. In other embodiments, other transmission media suitable for transmitting high-frequency energy can also be used, or high-frequency currents of other frequencies can be used, and the present application is not intended to limit this.

[0043] Continue to refer Figure 3 The shielding device 330 includes an upper sleeve 332, a lower sleeve 334 and a shielding sheet 336. The energy transmission component 320 is disposed inside the upper sleeve 332 and the lower sleeve 334. Figure 3 In the example, the lower sleeve 334 is sleeved inside the upper sleeve 332 and connected to the upper mold 310a. The lower sleeve 334 should extend a predetermined length along the inside of the upper sleeve 332, that is, the upper sleeve 334 and the lower sleeve 332 overlap at least a predetermined length in the vertical direction.

[0044] The lower sleeve 334 can move with the upper mold 310a in the vertical direction between the farthest position and the closest position relative to the upper sleeve 332. The farthest position refers to the free end of the lower sleeve 334 (i.e., Figure 3 The closest position refers to the position where the free end of the lower sleeve 334 is closest to the upper sleeve 332 (for example, the position where the upper mold 310a moves upward from the welding position to the highest position, the position where the lower sleeve 334 is located). The predetermined length at least allows the lower sleeve 334 to not fall off the upper sleeve 332 when it moves to the farthest position relative to the upper sleeve 332.

[0045] The shielding sheet 336 is configured to surround at least a portion of the interface region 333 between the lower sleeve 334 and the upper sleeve 332. Figure 3As shown, the shielding sheet 336 has a first end 336a and a second end 336b, the first end 336a is mechanically and electrically connected to the lower portion of the upper sleeve 332, and the second end 336b is mechanically and electrically connected to the lower sleeve 334. When the lower sleeve 334 moves relative to the upper sleeve 332, the shielding sheet 336 can be deformed, but still covers at least a portion of the interface region 333 between the lower sleeve 334 and the upper sleeve 332 along the circumference of the upper sleeve 332 and the lower sleeve 334, so that the high-frequency energy leaked from the interface region 333 between the lower sleeve 334 and the upper sleeve 332 can be reflected or absorbed by the shielding sheet 336, thereby reducing or preventing the high-frequency energy emitted by the energy transmission component 320 from leaking outside the shielding device 330.

[0046] In some embodiments, the shielding sheet 336 shields 80% to 100% (e.g., 80%, 85%, 90%, 95%, or 100%) of the interface region 333 between the upper sleeve 332 and the lower sleeve 334 in the circumferential direction of the upper sleeve 332 and the lower sleeve 334. Figure 3 In the example of FIG. 3 , the upper sleeve 332 and the lower sleeve 334 each have a rectangular cross section, such as a square cross section. That is, the upper sleeve 332 and the lower sleeve 334 are constructed as rectangular tubes having four side walls 332s and 334s, respectively. Accordingly, the shielding sheet 336 includes four sub-portions 336s, each of which is connected to a corresponding side wall 332s of the upper sleeve 332 and a corresponding side wall 334s of the lower sleeve 334. The ratio of the width W of each sub-portion 336s in the horizontal direction in the figure to the width of the corresponding side wall 334s of the lower sleeve 334 (which is located inside the upper sleeve 332) is in the range of 80% to 100% (e.g., 80%, 85%, 90%, 95%, or 100%, etc.).

[0047] Those skilled in the art will appreciate that the shapes of the upper and lower casings of the present invention are not limited to Figure 3 In other embodiments, the cross-sections of the upper and lower sleeves may be triangular, circular, elliptical, or other polygonal shapes. In the case where the cross-sections of the upper and lower sleeves are circular or elliptical, the shielding sheet as a whole may circumferentially surround the upper and lower sleeves.

[0048] Continue to refer Figure 3 , the length L of the shielding sheet 336 ( Figure 3The length L of the shielding sheet 336 is at least equal to, and preferably greater than, the distance D between the connection position of the shielding sheet 336 on the lower sleeve 334 and the connection position on the upper sleeve 332 when the lower sleeve 334 is at the farthest position. In some embodiments, the ratio of the length L of the shielding sheet 336 to the distance D between the connection position of the shielding sheet 336 on the lower sleeve 334 and the connection position on the upper sleeve 332 when the lower sleeve 334 is at the farthest position is in the range of 120% to 200% (for example, 120%, 130%, 140%, 150%, 160%, 170%, 180%, 190%, or 200%, etc.). The above-mentioned length L setting of the shielding sheet 336 can avoid the shielding sheet 336 from being partially excessively bent during the up and down movement of the lower sleeve 334, which helps to increase the service life of the shielding sheet 336.

[0049] In some embodiments, the shielding sheet 336 is constructed as a metal sheet, made of a material including beryllium copper, or made of a material composed of beryllium copper, for example, beryllium copper with a grade of C17200 according to the Unified Numbering System (UNS) of metals and alloys of the United States can be used. However, the scope of the present invention is not limited thereto. In other embodiments, the shielding sheet 336 can be made of a material including copper, aluminum, iron, tin, silver, gold or other conductive materials. According to the conductive properties and elastic deformation properties of the material used to make the shielding sheet 336, the thickness of the shielding sheet 336 can be between 0.08 mm and 2 mm (for example, 0.08 mm, 0.09 mm, 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2 mm, etc.). In a specific example, when the shielding sheet 336 is made of beryllium copper with a grade of C17200, its thickness may be 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, or 0.14 mm.

[0050] It should be pointed out that although Figure 3 In the example of , the lower sleeve is arranged inside the upper sleeve and extends a predetermined length, but the present invention is not limited thereto. In some other embodiments, the upper sleeve may be arranged inside the lower sleeve and extend a predetermined length, and in this case, the ratio of the width of each sub-portion of the shielding sheet to the width of the corresponding side wall of the upper sleeve is in the range of 80% to 100%, including the end value. In addition, in Figure 3 In the example of FIG. 1 , the shielding sheet (or each sub-portion of the shielding sheet) is shown as a sheet structure, but the present invention is not limited thereto. In some other embodiments, the shielding sheet (or each sub-portion of the shielding sheet) can be constructed as a sheet structure having a mesh structure, a strip structure, or a sheet structure formed by embedding a linear structure (e.g., a conductive wire) in a flexible dielectric material.

[0051] Also refer to Figure 3 and Figure 4 , Figure 4 for Figure 3 An enlarged view of the shielding sheet 336 area shows that the first end 336 a of the shielding sheet 336 is detachably connected to the upper sleeve 332 via a first connecting mechanism 340 , and the second end 336 b of the shielding sheet 336 is detachably connected to the lower sleeve 334 via a second connecting mechanism 350 .

[0052] The first connection mechanism 340 and the second connection mechanism 350 can be made of conductive materials to mechanically and electrically connect the shielding sheet 336 to the upper sleeve 332 and the lower sleeve 334, respectively. In some embodiments, the first connection mechanism 340 and the second connection mechanism 350 can be made of materials including copper, aluminum, iron, tin, silver, gold, or other conductive materials.

[0053] like Figure 4 As shown, the first connection mechanism 340 includes a first fixing bracket 342 and a first pressing rod 344. The first fixing bracket 342 can be fixed on the upper sleeve 332, and the first pressing rod 344 is installed on the first fixing bracket 342, so that the first end 336a of the shielding sheet 336 is clamped between the first fixing bracket 342 and the first pressing rod 344. Figure 4 In the example shown, the first fixing bracket 342 can be fixed to the upper sleeve 332 by bolts 346, and the first pressure rod 344 can be installed on the first fixing bracket 342 by bolts 348. Since the first fixing bracket 342 and the upper sleeve 332, and the first pressure rod 344 and the first fixing bracket 342 are fixedly connected by bolts, they are not easy to loosen during the relative movement of the upper sleeve 332 and the lower sleeve 334. It can be understood by those skilled in the art that the first fixing bracket 342 and the upper sleeve 332 and / or the first pressure rod 344 and the first fixing bracket 342 can also be connected by other suitable connection methods such as welding, adhesives, screws, rivets, buckles, etc.

[0054] exist Figure 4In the example shown, the second connection mechanism 350 has a structure similar to the first connection structure 340. Specifically, the second connection mechanism 350 includes a second fixing bracket 352 and a second pressure rod 354. The second fixing bracket 352 can be fixed on the lower sleeve 334, and the second pressure rod 354 can be installed on the second fixing bracket 352, so that the second end 336b of the shielding sheet 336 is clamped between the second fixing bracket 352 and the second pressure rod 354. The second fixing bracket 352 can be fixed on the lower sleeve 334 by a bolt 356, and the second pressure rod 354 can be installed on the second fixing bracket 352 by a bolt 358. Similarly, the second fixing bracket 342 and the lower sleeve 334 and / or the second pressure rod 344 and the second fixing bracket 352 can also be connected by other suitable connection methods such as welding, adhesive, screws, rivets, buckles, etc.

[0055] Continue to refer Figure 4 The first fixing bracket 342 is an elongated member with an L-shaped cross section, which includes a first handle 342a for fixing on the upper sleeve 332 and a second handle 342b for engaging the first pressing rod 344. The first end 336a of the shielding sheet 336 is installed with the second handle 342b of the L-shaped first fixing bracket 342 through the first pressing rod 344. The first fixing bracket 342 with an L-shaped cross section can change the installation direction of the shielding sheet 336, and the installation tool can extend into the gap between the upper sleeve 332 and the surrounding components in a direction parallel to the side wall of the upper sleeve 332, so as to fix the first end 336a of the shielding sheet 336 to the corresponding surface of the upper sleeve 332. This is conducive to the installation of the shielding sheet 336 on the device 300 in a narrow space, and it is not easy to contact other electrical devices, reducing the risk of causing false alarms.

[0056] In addition, the contact surface between the shielding sheet 336 and the first fixing bracket 342 is larger, which can more effectively prevent high-frequency energy leakage. Similarly, the second fixing bracket 352 is also an elongated member with an L-shaped cross section, which includes a first handle 352a for fixing on the lower sleeve 334, and a second handle 352b for engaging the second pressure rod 354. Similarly, the second fixing bracket 352 has the same advantages as the first fixing bracket 342.

[0057] Those skilled in the art will understand that Figure 4The first connecting mechanism and the second connecting mechanism shown are only examples, and other connecting mechanisms that can fix the shielding sheet to the upper sleeve and the lower sleeve and achieve good electrical contact can be applied to the device for forming a medical fluid bag of the present invention. For example, only one of the first connecting mechanism and the second connecting mechanism of the structure described above can be set to mechanically and electrically connect one end of the shielding sheet to the corresponding sleeve, while the other end of the shielding sheet is connected to the sleeve through a connecting mechanism of other structures (for example, by adhesive, screws, bolts, etc.).

[0058] In addition, although in the above embodiments, the shielding device in the present invention is described in conjunction with the equipment for forming a medical fluid bag, those skilled in the art can foresee that the above-mentioned shielding device including the upper sleeve, the lower sleeve and the shielding sheet is also suitable for other types of application scenarios with high-frequency radiation shielding requirements.

[0059] The discussion herein includes a number of illustrative drawings that show various parts of an apparatus for forming a medical fluid bag. For clarity of illustration, these figures do not show all aspects of each example assembly. Any example assembly and / or method provided herein may share any or all features with any or all other assemblies and / or methods provided herein.

[0060] Various embodiments have been described herein with reference to the accompanying drawings. However, it is apparent that various modifications and changes may be made thereto, and additional embodiments may be implemented without departing from the broader scope of the invention as set forth in the appended claims. In addition, other embodiments will be apparent to those skilled in the art by considering the specification and practice of one or more embodiments of the invention disclosed herein. Therefore, the present application and the embodiments herein are intended to be considered merely exemplary, with the true scope and spirit of the invention being indicated by the list of the appended exemplary claims.

Claims

1. An apparatus for forming a medical fluid bag, characterized in that The device comprises: a welding device configured to weld the first film and the second film together to form a medical fluid bag; an energy transmission component configured to transmit high frequency energy to the welding device; and A shielding device, the shielding device comprising: Put on casing; a lower casing, the lower casing being arranged inside or outside the upper casing and being movable in a vertical direction between a farthest position and a closest position relative to the upper casing, the farthest position being a position where the free end of the lower casing is farthest from the upper casing, and the closest position being a position where the free end of the lower casing is closest to the upper casing; and a shielding sheet configured to surround at least a portion of an interface region between the lower bushing and the upper bushing, wherein the shielding sheet has a first end mechanically and electrically connected to the upper bushing and a second end mechanically and electrically connected to the lower bushing, and the shielding sheet is deformable when the lower bushing moves relative to the upper bushing; Wherein, the lower casing is connected to the welding device, and the energy transmission component is arranged inside the upper casing and the lower casing.

2. The device according to claim 1, characterized in that The welding device comprises: an upper mold, the upper mold being mechanically connected to the lower sleeve so as to move with the lower sleeve; and A lower die is operably aligned with the upper die, wherein the upper die is movable relative to the lower die to a welding position, in which the upper die and the lower die squeeze the first film and the second film disposed therebetween and weld the first film and the second film together using high frequency energy transmitted by the energy transmission component.

3. The device according to claim 1 or 2, characterized in that The first end of the shielding sheet is detachably connected to the upper sleeve via a first connection mechanism, and / or the second end of the shielding sheet is detachably connected to the lower sleeve via a second connection mechanism.

4. The device according to claim 3, characterized in that The first connecting mechanism comprises: A first fixing bracket, the first fixing bracket being fixed on the upper sleeve; and a first pressing rod, wherein the first pressing rod is mounted on the first fixing bracket, wherein the first end of the shielding sheet is clamped between the first fixing bracket and the first pressing rod; and / or The second connecting mechanism comprises: A second fixing bracket, the second fixing bracket being fixed on the lower casing; and A second pressure rod is mounted on the second fixing bracket, wherein the second end of the shielding sheet is clamped between the second fixing bracket and the second pressure rod.

5. The device according to claim 4, characterized in that The first fixing bracket is fixed to the upper casing by welding, adhesive, screws, bolts or rivets; and / or the second fixing bracket is fixed to the lower casing by welding, adhesive, screws, bolts or rivets.

6. The device according to any one of claims 4 to 5, characterized in that The first pressure rod is mounted on the first fixing bracket by means of a buckle, a screw, a bolt or a rivet; and / or the second pressure rod is mounted on the second fixing bracket by means of a buckle, a screw, a bolt or a rivet.

7. The device according to any one of claims 4 to 6, characterized in that The first fixing bracket is an elongated member with an L-shaped cross section, which has a first handle fixed to the upper sleeve and a second handle for engaging the first pressure rod; and / or The second fixing bracket is an elongated member with an L-shaped cross section, which has a first handle portion fixed to the lower casing and a second handle portion for engaging the second pressure rod.

8. The device according to any one of claims 1 to 7, characterized in that Along the circumference of the upper sleeve and the lower sleeve, the shielding sheet shields 80% to 100% of the interface area between the upper sleeve and the lower sleeve.

9. The device according to any one of claims 1 to 8, characterized in that The upper sleeve and the lower sleeve each have a rectangular cross section.

10. The device according to claim 9, characterized in that The shielding sheet includes four sub-parts, and each sub-part is connected to a corresponding side wall of the upper sleeve and a corresponding side wall of the lower sleeve.

11. The device according to claim 10, characterized in that The ratio of the width of each sub-portion to the width of the corresponding side wall of the inner one of the upper and lower sleeves is in the range of 80% to 100%.

12. The device according to any one of claims 1 to 11, characterized in that The length L of the shielding sheet is equal to or greater than a distance D between a connection position of the shielding sheet on the lower sleeve and a connection position of the shielding sheet on the upper sleeve when the lower sleeve is at the farthest position.

13. The device according to claim 12, characterized in that A ratio of a length L of the shielding sheet to a distance D between a connection position of the shielding sheet on the lower sleeve and a connection position on the upper sleeve when the lower sleeve is at the farthest position is in a range of 120% to 200%.

14. The device according to any one of claims 1 to 13, characterized in that The shielding sheet is made of a material including beryllium copper, or is made of a material consisting of beryllium copper.

15. The device according to any one of claims 1 to 14, characterized in that The thickness of the shielding sheet is in the range of 0.08 mm to 2 mm.

16. The device according to claim 15, characterized in that The thickness of the shielding sheet is in the range of 0.10 mm to 0.14 mm.

17. The device according to any one of claims 1 to 16, characterized in that The energy transmission component includes a radio frequency coaxial tube.

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