Puncture equipment for sealing and liquid taking device of storage and transportation packaging bag

Abstract

The utility model relates to the related technical field of sealed liquid taking, discloses puncture equipment of a sealed liquid taking device of a storage and transportation packaging bag, and aims to solve the problem that liquid is easy to leak from cracks when liquid is taken by a needle head. The puncture frame screwed in place linearly pushes out the puncture cylinder through rotation, the leakage-proof cavity is relatively sealed and then punctures the sealing plug, it is guaranteed that the puncture needle does not burst into the sealing plug for a long time, so that the problems that people are punctured and the sealing plug is curled due to collision are solved, and in the puncture sampling process, the leakage-proof cavity has a relatively sealed environment, so that the puncture needle is prevented from being damaged after puncturing the sealing plug. Medium leaks from a small puncture gap between the puncture needle and the sealing plug, and finally the effects of vertically puncturing the needle head to take liquid and sealing and preventing liquid leakage are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of sealed liquid extraction, and in particular to a puncture device for a liquid extraction device for sealing and sealing storage and transportation packaging bags. Background Technology

[0002] The packaging bag sealing and liquid dispensing device is a comprehensive device that integrates the functions of sealing, closure, liquid dispensing, and needle protection. It is particularly suitable for the packaging, storage, and dispensing of liquid products (such as dairy products, liquid flavorings, etc.) and aims to ensure the safety and hygiene of liquids during storage, transportation, and dispensing.

[0003] Traditional packaging bags often use a syringe to directly puncture the outer sealing plug of the bag to extract the liquid. However, this method has shortcomings in terms of fixing and protecting the liquid extraction needle. Existing technology (such as publication number CN117302739B) proposes a flexible packaging bag and its matching puncture extraction device. The flexible packaging bag includes a cap and a bag body. The cap consists of a base, a connecting seat, and a valve core. The base is fixedly connected to the bag body and has a through hole to allow communication between the inside and outside of the bag. The connecting seat is interference-fitted into the through hole of the base and has a through hole on it. The valve core consists of a valve core wall and an inner core. The valve core wall is adhered and fixed to the outside of the through hole of the connecting seat, while the inner core seals the through hole of the connecting seat. The valve core is made of an elastic material.

[0004] This technical solution achieves high-flow-rate filling through the base through-hole, improving filling efficiency. After filling, the connecting seat is inserted into the base through-hole for an interference fit, achieving a fixed connection. Simultaneously, the connecting seat can be connected to an external puncture and extraction device to extract the liquid. The elastic material properties of the valve core allow for repeated punctures, and the liquid inside the bag will not leak or evaporate when no puncture and extraction device is connected.

[0005] However, in practical applications, given the common one-piece injection molding design between the needle hub and the needle tube, this structural characteristic presents a potential problem: when attempting rotation via the threads on the outside of the needle hub, the needle hub and needle tube rotate synchronously as a whole. This synchronous rotation is particularly noticeable during the rotational insertion of the rubber stopper. Specifically, with continued rotation, the contact area and cutting force between the needle and the rubber stopper increase. This not only exacerbates physical damage at the needle insertion site, leading to more pronounced and widespread cracks, but also seriously threatens the sealing performance of the rubber stopper during liquid extraction. The decline in sealing performance directly results in potential liquid leakage after extraction, affecting the accuracy and efficiency of the extraction operation and potentially contaminating subsequently used or stored liquids, leading to a series of adverse consequences. Utility Model Content

[0006] This utility model proposes a puncture device for a liquid extraction device for sealing and sealing storage and transportation packaging bags. It has the advantages of vertical needle insertion for liquid extraction and sealing to prevent leakage, thereby solving the problem of easy leakage from cracks when extracting liquid with needles as mentioned in the background art.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a puncture device for a sealing and liquid extraction device for storage and transportation packaging bags, comprising: a filling bag containing a medium, with a connecting cap fixed at the bottom; an intermediate frame fixed in the connecting cap, the intermediate frame having a liquid extraction section in the middle and a threaded groove inside, and a sealing plug fixedly installed at the top of the intermediate frame between the liquid extraction section and the filling bag; a puncture frame with threads screwed into the intermediate frame on the outside, a sealing ring fixedly installed in the middle of the puncture frame, and a puncture cylinder movably fitted inside; and a leak-proof cavity. It consists of a sealing plug, an internal liquid extraction section, an internal puncture frame, and a puncture cylinder. The puncture cylinder has threads on its side, and a rotating cylinder with a threaded connection to the puncture cylinder is movably installed at the bottom of the puncture frame. A detection piston rod is installed on the side of the puncture frame, and the end of the detection piston rod is inserted into a rectangular groove on the outer side of the puncture cylinder. A puncture needle is fixed on the puncture cylinder. When the puncture cylinder drives the puncture needle to puncture the sealing plug and the filling bag, the puncture cylinder squeezes the air in the leak-proof cavity, making the air pressure in the leak-proof cavity greater than the internal pressure of the filling bag, thus preventing the medium in the filling bag from leaking downwards through the crack.

[0008] Furthermore, the thread direction of the puncture tube is opposite to that of the thread direction of the puncture frame.

[0009] Furthermore, an installation groove is provided at the bottom of the material barrel, and the filling bag is placed in the material barrel.

[0010] Furthermore, a feeding tube communicating with the puncture needle is fixedly installed at the bottom of the puncture tube, and a dispensing syringe is fixedly installed at the other end of the feeding tube, so that the medium can be output from the filling bag to the outside.

[0011] Furthermore, a pneumatic pressure detection cylinder is fastened to the middle of the puncture frame, and the detection piston rod is movably installed inside the pneumatic pressure detection cylinder. An overflow hole is opened on the side of the pneumatic pressure detection cylinder, and a reset push spring is provided between the detection piston rod and the pneumatic pressure detection cylinder.

[0012] Furthermore, limit holes are provided on the side of the intermediate frame and an angled opening is provided at the bottom.

[0013] Furthermore, the side of the puncture tube is provided with a limiting groove, a sealing detection straight section, a locking straight section, and an anti-dislodgement groove in the rectangular groove. The limiting groove is located at the top of the rectangular groove, and the anti-dislodgement groove is located at the bottom of the rectangular groove. The limiting groove and the anti-dislodgement groove are transitioned by the sealing detection straight section and the locking straight section.

[0014] Furthermore, there are stepped surfaces between the limiting groove, the sealing detection straight surface, and the locking straight surface. The limiting groove has the largest groove depth, followed by the sealing detection straight surface, and the locking straight surface has the smallest groove depth.

[0015] Furthermore, the anti-detachment groove is an arc groove, and the end of the detection piston rod is provided with an arc angle.

[0016] This utility model has the following beneficial effects:

[0017] This utility model provides a puncture device for a sealing and liquid extraction apparatus for storage and transportation packaging bags. This device achieves effective management of the puncture needle by embedding it within a puncture frame. When the puncture frame is precisely screwed onto the connecting cap via threads, the screwed-in puncture frame, during its continued rotation, drives the puncture cylinder to be smoothly pushed out in a straight line. This pushing action not only ensures that the puncture needle can accurately and vertically pierce the sealing plug but also reduces the cutting of the sealing plug by the needle tip.

[0018] Furthermore, this puncture device fully utilizes the relatively sealed environment of the leak-proof chamber during the puncture and sampling process. This design effectively avoids the problem of media leakage from the tiny puncture gap between the puncture needle and the sealing plug after the puncture needle punctures the sealing plug. By ensuring a tight seal during the puncture process, this device not only improves the efficiency of liquid extraction but also further guarantees the purity and safety of the media. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles disclosed herein.

[0020] The present invention can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0021] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall internal planar cross-sectional structure of this utility model;

[0023] Figure 3 This is a planar sectional view of the installation position of the connecting cover and its internal components in this utility model.

[0024] Figure 4 for Figure 3 Enlarged structural diagram at point E in the middle;

[0025] Figure 5 This is a schematic diagram showing the location and structure of the mounting groove of this utility model;

[0026] Figure 6This is a schematic diagram of the installation position and internal three-dimensional structure of the intermediate frame of this utility model;

[0027] Figure 7 This is a schematic diagram of the overall external three-dimensional structure of the puncture frame of this utility model;

[0028] Figure 8 This is a schematic diagram of the overall external three-dimensional structure of the intermediate frame of this utility model;

[0029] Figure 9 This is a schematic cross-sectional view of the middle part of the puncture tube of this utility model.

[0030] In the diagram: 1. Material bucket; 101. Mounting groove; 2. Puncture frame; 3. Rotary drum; 4. Puncture cylinder; 401. Limiting groove; 402. Sealing detection straight section; 403. Locking straight section; 404. Anti-detachment groove; 5. Feeding pipe; 6. Discharge syringe; 7. Filling bag; 8. Connecting cap; 9. Intermediate frame; 900. Limiting hole; 10. Sealing plug; 11. Sealing ring; 12. Puncture needle; 13. Air pressure detection cylinder; 130. Overflow hole; 14. Detection piston rod; 140. Reset push spring; 15. Leakage prevention cavity. Detailed Implementation

[0031] 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.

[0032] As an example, such as Figures 1-3 As can be seen, the medium is generally contained in the filling bag 7. The medium may include dairy products, liquid flavorings, etc. Generally, the filling bag 7 has two layers, with a connecting cap 8 bonded between the two layers using thermoplastic bonding. (Reference) Figure 3 As can be seen, after the connecting cap 8 is thermoplastically bonded to the filling bag 7, the inner filling bag 7 and the top of the connecting cap 8 are bonded together, thereby achieving a seal between the inside of the connecting cap 8 and the inner cavity of the filling bag 7.

[0033] The intermediate frame 9 is fixedly installed inside the connecting cover 8, and the two are sealed together. The intermediate frame 9 has an annular liquid-collecting section in the middle, such as... Figure 3 , Figure 6 and Figure 8 As can be seen, a sealing plug 10 is fixedly installed on the top of the intermediate frame 9 between the liquid taking part and the filling bag 7. Thus, it can be seen that the sealing plug 10 and the filling bag 7 achieve a double-layer seal between the intermediate frame 9 and the inner cavity of the filling bag 7, which greatly ensures the sealing performance of the filling bag 7 when it is not punctured.

[0034] The intermediate frame 9 has a threaded groove inside, and the external puncture frame 2 can be screwed into the intermediate frame 9 using the external thread. This causes the sealing ring 11 fixedly installed in the middle of the puncture frame 2 to abut against the liquid collection part on the intermediate frame 9, achieving a relative seal of the liquid collection part. The puncture frame 2 has a movably fitted puncture cylinder 4 inside, combined with... Figure 3 , Figure 6 and Figure 7 It can be seen that a sealing ring achieves a relative seal between the outer side of the puncture cylinder 4 and the puncture frame 2, thereby relatively sealing the leak-proof cavity 15 constructed between the sealing plug 10, the inside of the liquid collection section, the inside of the puncture frame 2, and the puncture cylinder 4. After the sealing plug 10 is punctured, the medium in the filling bag 7 cannot leak downwards along the tiny gap left during puncture. The side of the puncture cylinder 4 is provided with threads. Correspondingly, a rotating cylinder 3, which is threadedly connected to the puncture cylinder 4, is movably installed at the bottom of the puncture frame 2. It should be noted that the rotating cylinder 3 can only rotate at the bottom of the puncture frame 2 and cannot move along the axial direction of the puncture frame 2. The thread direction of the puncture cylinder 4 is opposite to that of the thread direction of the puncture frame 2. The advantage of this design is that, combined with Figure 3 , Figure 4 , Figure 6 and Figure 7 As can be seen, a detection piston rod 14 is movably installed on the outside of the puncture frame 2, and the end of the detection piston rod 14 is inserted into a rectangular groove opened on the outside of the puncture cylinder 4. The detection piston rod 14 restricts the puncture cylinder 4 to only move vertically up and down inside the puncture frame 2. When the rotating cylinder 3 is turned and the puncture cylinder 4 moves downward, after the puncture cylinder 4 reaches its limit, the puncture cylinder 4 will drive the puncture needle 12 fixed inside to retract into the puncture frame 2, thus ensuring that the puncture needle 12 will not protrude excessively and cause damage. The puncture cylinder 4 drives the puncture frame 2 to rotate synchronously through the detection piston rod 14. When the puncture frame 2 rotates with the rotating cylinder 3, the threads on the outside of the puncture frame 2 can be screwed into the threaded groove inside the intermediate frame 9. Similarly, when the rotating cylinder 3 rotates in the opposite direction, it will cause the puncture cylinder 4 to move upward, thereby pushing the puncture needle 12 upward until the puncture needle 12 punctures the sealing plug 10.

[0035] In practical applications, refer to Figure 5 It can be seen that the bottom of the material bucket 1 has a gourd-shaped mounting groove 101, such as... Figures 1-3 As shown, the filling bag 7 is generally placed in the material barrel 1, and the connecting cover 8 is used to snap into the mounting groove 101, so that the connecting cover 8 is stably installed at the bottom of the material barrel 1.

[0036] Since the puncture frame 2 is reusable, during transportation, the rotating drum 3 rotates forward at the bottom of the puncture frame 2, causing the puncture cylinder 4 to move downward. The detection piston rod 14 pushes the puncture cylinder 4 to its limit, and the threads on the outside of the puncture cylinder 4 restrict the rotating drum 3 from rotating. At this time, the puncture cylinder 4 drives the puncture needle 12 to retract into the puncture frame 2, ensuring that the puncture needle 12 can retract into the puncture frame 2 when not in use, avoiding puncturing the user or being impacted during transportation, which could cause the tip to curl.

[0037] When it is necessary to remove the medium from the filling bag 7, the filling bag 7 is suspended to the required position using the material bucket 1. Then, the thread on the puncture frame 2 is aligned with the threaded groove on the inner side of the intermediate frame 9, and the rotating drum 3 is turned in the forward direction. Since the puncture cylinder 4 cannot continue to descend at this time, when the rotating drum 3 drives the puncture cylinder 4 to rotate, it will force the puncture frame 2 to rotate in the forward direction simultaneously, causing the puncture frame 2 to be screwed into the intermediate frame 9 until the liquid taking part on the intermediate frame 9 and the puncture frame 2 can squeeze the sealing ring 11, thus ensuring that the leak-proof cavity 15 can be relatively sealed.

[0038] Subsequently, the puncture frame 2 is manually prevented from rotating, while the rotating cylinder 3 rotates in the opposite direction, causing the puncture cylinder 4 to move upward. During the upward movement of the puncture cylinder 4, the medium inside the leak-proof chamber 15 is compressed, increasing the air pressure inside the leak-proof chamber 15. As the puncture cylinder 4 pushes the puncture needle 12 upward, the puncture needle 12 extends from the puncture frame 2 and punctures the sealing plug 10 and the filling bag 7 in sequence, allowing the medium inside the filling bag 7 to be output from the puncture needle 12. During this process, because the air inside the leak-proof chamber 15 is compressed, its pressure is relatively higher than the pressure inside the filling bag 7. Therefore, if a crack leaks due to puncture of the sealing plug 10, the relatively high pressure inside the leak-proof chamber 15 will prevent the medium inside the filling bag 7 from being injected into the leak-proof chamber 15 through the crack, ensuring that the medium in the filling bag 7 does not leak outward. The medium output from the puncture needle 12 is conveyed to the discharge needle 6 through the feed pipe 5 fixed at the bottom of the puncture cylinder 4. The discharge needle 6 is inserted into the required position, thus completing the liquid extraction of the medium from the filling bag 7.

[0039] Finally, after all the medium in the filling bag 7 has been released, the rotating drum 3 only needs to be continuously rotated in the opposite direction. When the puncture drum 4 moves to the upper limit, the puncture frame 2 and the rotating drum 3 will be unable to rotate relative to each other. The rotating drum 3 will drive the puncture frame 2 to rotate in the opposite direction, thereby causing the puncture frame 2 to detach from the intermediate frame 9.

[0040] Example 2 is a further improvement on Example 1, with reference to... Figure 3 , Figure 4 and Figure 6It can be seen that a pneumatic detection cylinder 13, which communicates with the inner cavity of the puncture frame 2, is fastened to the middle of the puncture frame 2, and a detection piston rod 14 is movably installed inside the pneumatic detection cylinder 13. Specifically, the detection piston rod 14 moves inside the pneumatic detection cylinder 13 using an external piston. The pneumatic detection cylinder 13 has an overflow hole 130 communicating with the outside on its side. Under normal conditions, it is pushed by the elastic force of the reset spring 140 between the detection piston rod 14 and the pneumatic detection cylinder 13, forcing the detection piston rod 14 to always tend to move towards the puncture cylinder 4, causing the detection piston rod 14 to relatively block the overflow hole 130 and the inner cavity of the puncture frame 2. Correspondingly, combined with Figure 3 , Figure 4 and Figure 8 As can be seen, a limiting hole 900 is provided on the side of the intermediate frame 9. The puncture frame 2 is screwed into the inner threaded channel of the intermediate frame 9 via the outer thread. After the puncture frame 2 is screwed in, the detection piston rod 14 will be inserted into the limiting hole 900, thereby using the detection piston rod 14 to prevent relative rotation between the intermediate frame 9 and the puncture frame 2. More details can be found from... Figure 4 It is evident that the bottom of the intermediate frame 9 has an angled opening. When the puncture frame 2 is screwed towards the intermediate frame 9, the detection piston rod 14 is first blocked by the angled opening, causing it to move further towards the puncture cylinder 4 and stretching the reset spring 140. Afterwards, once the puncture frame 2 is screwed in, the reset spring 140, under its restoring force, pulls the detection piston rod 14 into the limiting hole 900, thus restricting relative rotation between the two. This method ensures that after the puncture frame 2 is screwed in, when the rotating cylinder 3 rotates in the opposite direction, the puncture frame 2 will not rotate in the opposite direction synchronously with the rotating cylinder 3, eliminating the need for the user to manually restrict its rotation after installation.

[0041] Moreover, combined Figure 4 and Figure 9It can be seen that the puncture tube 4 has a limiting groove 401, a sealing detection straight section 402, a locking straight section 403, and an anti-detachment groove 404 on its side within the rectangular groove. The limiting groove 401 is located at the top of the rectangular groove, and the anti-detachment groove 404 is located at the bottom of the rectangular groove. The limiting groove 401 and the anti-detachment groove 404 are connected by the sealing detection straight section 402 and the locking straight section 403. More specifically, the limiting groove 401, the sealing detection straight section 402, and the locking straight section 404... The three sections have stepped surfaces. The limiting groove 401 has the greatest depth, followed by the sealing detection straight section 402, and the locking straight section 403 has the smallest depth. The anti-detachment groove 404 is generally an arc groove. Correspondingly, the end of the detection piston rod 14 is provided with an arc angle. The advantage of this is that when the detection piston rod 14 comes into contact with the anti-detachment groove 404, the anti-detachment groove 404 restricts the upward movement of the detection piston rod 14 to a certain extent, resulting in a certain resistance to the detachment of the detection piston rod 14. When the upward movement force of the detection piston rod 14 is greater than this resistance, the detection piston rod 14 will disengage from the anti-detachment groove 404 and move upward along the locking straight section 403.

[0042] In practice, under normal conditions, the detection piston rod 14 is opposite to the limiting groove 401. Under normal conditions, the detection piston rod 14 will not extend into the limiting groove 401. The end of the detection piston rod 14 is vertically aligned with the sealing detection straight surface 402. At this time, the puncture cylinder 4 also drives the puncture needle 12 to retract into the puncture frame 2, ensuring that the puncture needle 12 will not extend out of the puncture frame 2 during transportation.

[0043] When it is necessary to extract the medium from the filling bag 7, the threads on the puncture frame 2 align with the threaded grooves on the inner side of the intermediate frame 9. As the rotating drum 3 drives the puncture frame 2 to rotate forward, the puncture cylinder 4 moves downward. At this time, the detection piston rod 14 has reached the top of the rectangular groove, so the puncture cylinder 4 cannot descend. Simultaneously, the forward rotation of the rotating drum 3 causes the puncture frame 2 to rotate forward synchronously.

[0044] As the puncture frame 2 continues to rotate upwards, the detection piston rod 14 will first contact the bevel at the bottom of the intermediate frame 9. The bevel push forces the detection piston rod 14 into the limiting groove 401. At this point, the detection piston rod 14 will cause the reset spring 140 to stretch, and under the elastic pull of the reset spring 140, the detection piston rod 14 will always remain against the inner side of the intermediate frame 9. As the puncture frame 2 continues to rotate upwards onto the intermediate frame 9, the liquid collection section and the puncture frame 2 will compress the sealing ring 11. When the detection piston rod 14 rotates to the limiting hole 900, it is pulled away from the limiting groove 401 by the elastic pull of the reset spring 140 and inserted into the limiting hole 900. At this point, the puncture frame 2 is fully inserted, and the insertion of the detection piston rod 14 into the limiting hole 900 prevents relative rotation between the puncture frame 2 and the intermediate frame 9. Subsequently, when the rotating cylinder 3 is turned again, its resistance increases further, causing the rotating cylinder 3 to be unable to continue turning, thus indicating that the puncture frame 2 has been screwed into place.

[0045] Because the intermediate frame 9 is fastened to the connecting cover 8 and is restricted by the detection piston rod 14, the puncture frame 2 is also unable to rotate. When the operator then rotates the rotating cylinder 3 in the opposite direction, the rotating cylinder 3 will push the puncture cylinder 4 upward. During this process, the puncture cylinder 4 will squeeze the inner cavity of the leak-proof chamber 15. When the puncture cylinder 4 moves upward, it will cause the pressure in the inner cavity of the leak-proof chamber 15 to increase.

[0046] If a leak occurs in the leak-proof cavity 15, the upward-moving puncture cylinder 4 will not cause an increase in pressure within the leak-proof cavity 15. As the puncture cylinder 4 continues to rise, the detection piston rod 14 will reach the step surface between the sealing detection straight section 402 and the locking straight section 403. At this point, the puncture needle 12 has not yet penetrated the sealing plug 10 and is restricted by the detection piston rod 14, preventing the puncture cylinder 4 from continuing to rise. This serves as a warning to the operator that the leak-proof cavity 15 is not sealed and requires maintenance. Due to limitations in actual production, generally, a new puncture frame 2 should be replaced first before operation, and then the puncture frame 2 should be maintained subsequently to ensure work efficiency.

[0047] If the leak-proof cavity 15 is well-sealed, it forces an increase in the airflow pressure inside the leak-proof cavity 15. Simultaneously, as the airflow pressure inside the leak-proof cavity 15 increases, the detection piston rod 14 further compresses the reset spring 140 until the piston on the outside of the detection piston rod 14 passes the overflow hole 130. At this point, the airflow inside the leak-proof cavity 15 flows out through the overflow hole 130, preventing excessive pressure in the leak-proof cavity 15 from causing excessive upward resistance in the puncture cylinder 4. When the detection piston rod 14 compresses the reset spring 140, the end of the detection piston rod 14 also moves relatively away from the sealing detection straight section 402, allowing the locking straight section 403, which follows the upward movement of the puncture cylinder 4, to directly pass over the detection piston rod 14. As the puncture cylinder 4 continues to move upward, the puncture needle 12 punctures the sealing plug 10 and the filling bag 7, allowing the medium in the filling bag 7 to be transported from the puncture needle 12 into the delivery pipe 5, and finally output from the discharge syringe 6.

[0048] When the puncture cylinder 4 reaches its top limit, the detection piston rod 14 moves to the bottom of the rectangular groove and is aligned with the anti-detachment groove 404. Under the elastic force of the reset spring 140, the detection piston rod 14 is forced to abut against the anti-detachment groove 404. Moreover, after the piston on the detection piston rod 14 passes the overflow hole 130, it will simultaneously squeeze the inside of the leak-proof cavity 15, making the pressure inside the leak-proof cavity 15 relatively higher than the pressure inside the filling bag 7, thus preventing the medium in the filling bag 7 from leaking into the leak-proof cavity 15.

[0049] After the medium in the filling bag 7 is completely discharged, since the puncture frame 2 can be reused, it needs to be removed from the intermediate frame 9 and inserted into the next intermediate frame 9 to continue working. During this process, the rotating drum 3 needs to rotate forward first, thus providing downward force to the puncture cylinder 4. When the downward force of the puncture cylinder 4 exceeds the resistance of the detection piston rod 14 disengaging from the anti-disengagement groove 404, the locking straight section 403 will move downward relative to the detection piston rod 14. Because the downward movement of the detection piston rod 14 causes a decrease in pressure within the leak-proof cavity 15:

[0050] If the puncture frame 2 is well sealed, when the top of the rectangular groove of the puncture cylinder 4 moves to the end of the detection piston rod 14, the pressure in the inner cavity of the anti-leakage chamber 15 will decrease, causing the detection piston rod 14 to insert into the limiting groove 401. This will disengage the detection piston rod 14 from the limiting hole 900. Afterward, only reverse rotation of the rotating cylinder 3 is needed. As the detection piston rod 14 abuts against the stepped surface between the limiting groove 401 and the sealed detection straight section 402, the rotating cylinder 3 will drive the puncture frame 2 to rotate synchronously in the opposite direction until the puncture frame 2 disengages from the intermediate frame 9. Moreover, the puncture needle 12 remains in the inner cavity of the puncture frame 2 after disengagement, eliminating the need for additional retraction of the puncture needle 12.

[0051] If the puncture frame 2 experiences a severe sealing leak, such as at the sealing points between the outer piston of the detection piston rod 14 and the air pressure detection cylinder 13, or between the puncture cylinder 4 and the puncture frame 2, external airflow will flow into the leak-proof chamber 15 through the leak. This will prevent the pressure inside the leak-proof chamber 15 from decreasing. As the puncture cylinder 4 rotates forward, the detection piston rod 14 will move to the top of the rectangular groove. Since the internal pressure of the leak-proof chamber 15 is relatively equal to the external atmospheric pressure at this point, the detection piston rod 14 will not enter the limiting groove 401. Reversing the rotation by the rotating cylinder 3 will not cause the puncture frame 2 to detach from the intermediate frame 9. At this point, the operator will know that the puncture frame 2 may have a sealing leak and cannot be used again; a new puncture frame 2 needs to be replaced. Finally, when the leaking puncture frame 2 needs to be repaired, a cylindrical rod or other rod is used to reach the end of the detection piston rod 14 through the limiting hole 900, so that the end of the detection piston rod 14 is reached into the limiting groove 401 under the intervention of the operator. Then, by rotating the rotating drum 3 in the opposite direction, the puncture frame 2 can be removed from the intermediate frame 9 to facilitate the completion of subsequent maintenance work.

Claims

1. A puncture device for a liquid taking device of a seal of a storage and transport packaging bag, characterized in that include: A filling bag (7) is filled with a medium and has a connecting cap (8) fixed at the bottom; The intermediate frame (9) is fixed in the connecting cover (8). The intermediate frame (9) has a liquid taking part in the middle and a threaded groove inside. A sealing plug (10) is fixedly installed on the top of the intermediate frame (9) between the liquid taking part and the filling bag (7). The sealing plug (10) and the filling bag (7) are used to achieve double sealing of the medium. The puncture frame (2) has a thread on the outside that screws into the intermediate frame (9), and a sealing ring (11) is fixedly installed in the middle of the puncture frame (2), and a puncture cylinder (4) is installed inside. The puncture tube (4) has threads on its side, and the bottom of the puncture frame (2) is movably installed with a rotating cylinder (3) that is threadedly connected to the puncture tube (4); The detection piston rod (14) is installed on the side of the puncture frame (2), and the end of the detection piston rod (14) is inserted into the rectangular groove opened on the outer side of the puncture tube (4); The puncture needle (12) is fixed on the puncture tube (4); The leak-proof cavity (15) is composed of a sealing plug (10), the inside of the liquid taking part, the inside of the puncture frame (2), and the puncture tube (4). When the puncture tube (4) drives the puncture needle (12) to puncture the sealing plug (10) and the filling bag (7), the puncture tube (4) squeezes the air in the leak-proof cavity (15), making the air pressure in the leak-proof cavity (15) greater than the internal pressure of the filling bag (7), thus preventing the medium in the filling bag (7) from leaking downwards through the crack.

2. The piercing apparatus of the sealed port tapping device for the storage and transport packaging bag according to claim 1, characterized in that, The thread direction of the puncture cylinder (4) is opposite to that of the puncture frame (2). The rotating cylinder (3) rotates in the forward direction to complete the threaded connection between the puncture frame (2) and the intermediate frame (9). The rotating cylinder (3) rotates in the reverse direction to enable the puncture cylinder (4) to drive the puncture needle (12) to puncture the sealing plug (10).

3. The piercing apparatus of the sealed port liquid taking device of the storage and transport packaging bag according to claim 1, characterized in that, The bottom of the material barrel (1) is provided with an installation groove (101), and the filling bag (7) is placed in the material barrel (1) to fix the filling bag (7).

4. The piercing apparatus of the sealed port liquid taking device of the storage and transport packaging bag according to claim 1, characterized in that, The bottom of the puncture tube (4) is fixedly installed with a feeding tube (5) that communicates with the puncture needle (12), and the other end of the feeding tube (5) is fixedly installed with a discharging syringe (6) to realize the output of the medium from the filling bag (7).

5. The piercing apparatus of the sealed port liquid taking device of the shipping and storage bag according to claim 1, wherein, A pressure detection cylinder (13) is fastened to the middle of the puncture frame (2), and the detection piston rod (14) is movably installed inside the pressure detection cylinder (13). An overflow hole (130) is opened on the side of the pressure detection cylinder (13), and a reset push spring (140) is provided between the detection piston rod (14) and the pressure detection cylinder (13).

6. The puncture device of the sealing and liquid extraction device for storage and transportation packaging bags according to claim 5, characterized in that, The intermediate frame (9) has a limit hole (900) on the side and an angled opening at the bottom.

7. The piercing apparatus of the sealed port liquid taking device of the storage and transport packaging bag according to claim 5, characterized in that, The puncture tube (4) is provided with a limiting groove (401), a sealing detection straight section (402), a locking straight section (403) and an anti-detachment groove (404) on its side and in a rectangular groove. The limiting groove (401) is located at the top of the rectangular groove, and the anti-detachment groove (404) is located at the bottom of the rectangular groove. The limiting groove (401) and the anti-detachment groove (404) are connected by the sealing detection straight section (402) and the locking straight section (403).

8. The puncture device of the liquid extraction device for sealing and sealing storage and transportation packaging bags according to claim 7, characterized in that, There are stepped surfaces between the limiting groove (401), the sealing detection straight section (402), and the locking straight section (403). The limiting groove (401) has the largest groove depth, followed by the sealing detection straight section (402), and the locking straight section (403) has the smallest groove depth.

9. The puncture device of the sealing and liquid extraction device for storage and transportation packaging bags according to claim 7, characterized in that, The anti-detachment groove (404) is an arc groove, and the end of the detection piston rod (14) is provided with an arc angle.

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