A disposable sampling pump

Abstract

This utility model relates to the technical field of sampling equipment and provides a disposable sampling pump, including a housing 1. A sampling mechanism is installed inside the housing. The sampling mechanism includes a sampling element. One end of the sampling element has a liquid inlet, and the other end has a liquid outlet. The end of the sampling element with the liquid inlet is provided with a second one-way valve, which controls the unidirectional entry of fluid into the sampling element. The end of the sampling element with the liquid outlet is provided with a first one-way valve, which controls the unidirectional discharge of fluid from the sampling element. The sampling element has a sampling chamber, and an elastic body is provided inside the sampling chamber. One side of the elastic body is provided with an axially movable pressing element. A limiting guide structure is provided between the pressing element and the sampling element, which limits the movement stroke of the pressing element.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, and in particular to a disposable sampling pump. Background Technology

[0002] In the fields of medicine, pharmaceuticals, and biological testing, accurate sampling of drug solutions is crucial for ensuring experimental accuracy, treatment safety, and production quality control. Traditional sampling methods often rely on simple container transfer or dropper operations. However, container transfer or droppers are not feasible when sampling some drug solutions that require high sealing properties.

[0003] When sampling liquid medications requiring high sealing, current sampling devices still rely on manual control of the clamping components to regulate liquid flow, allowing samples to flow out naturally by gravity. This method depends entirely on the operator's experience and feel, making it difficult to precisely control the sampling volume and prone to over- or under-sampling, leading to inaccurate test results, liquid waste, and even cross-contamination. Furthermore, manual flow rate control is susceptible to subjective factors, resulting in poor repeatability and failing to meet the requirements of standardized operation. The purpose of this invention is to solve the problems of inaccurate sampling volume, easy contamination, and difficulty in quantitative control caused by manual operation in the existing sampling process of highly sealed drug solutions. Utility Model Content

[0004] The purpose of this invention is to solve the problems of inaccurate sampling volume, easy contamination, and difficulty in quantitative control caused by manual operation in the sampling process of high-sealing liquid medicines. This invention adopts the following technical solution: A disposable sampling pump includes a housing, within which a sampling mechanism is installed. The sampling mechanism includes a sampling element, one end of which has a liquid inlet and the other end has a liquid outlet. A second one-way valve is provided at the end of the sampling element with the liquid inlet, controlling the unidirectional entry of fluid into the sampling element. A first one-way valve is provided at the end of the sampling element with the liquid outlet, controlling the unidirectional discharge of fluid from the sampling element. The sampling element has a sampling chamber, within which an elastic body is disposed. An axially movable pressing element is provided on one side of the elastic body. A limiting guide structure is provided between the pressing element and the sampling element, limiting the travel of the pressing element.

[0005] As described above, in a disposable sampling pump, the limiting guide structure includes a connecting portion disposed on the side wall of the pressing member and a matching portion disposed on the side wall of the sampling chamber that matches the shape of the connecting portion, wherein the matching portion is slidably connected to the connecting portion.

[0006] As described above, in a disposable sampling pump, the first check valve is made of an elastic material, the first check valve has a V-shaped groove, a through groove is provided at the center of the first check valve, and a plugging ring is provided on the outside of the first check valve. The side of the V-shaped groove toward the through groove is more inclined than the side toward the plugging ring.

[0007] As described above, in a disposable sampling pump, the second check valve is made of an elastic material and includes a cover plate. The front side of the cover plate is used to cover the connecting pipe port disposed on the upper cover plate, and the back side of the cover plate is provided with a support ring.

[0008] As described above, in a disposable sampling pump, the matching part is a groove formed on the side wall of the sampling chamber, and the connecting part is a slider provided on the side wall of the pressing member, wherein the slider slides in cooperation with the groove.

[0009] As described above, a disposable sampling pump includes a lower shell, an upper cover plate at one end of the lower shell, a second one-way valve between the upper cover plate and the sampling element, and a first one-way valve between the sampling element and one end of the inner cavity of the lower shell. The upper cover plate and the lower shell are respectively provided with connecting pipes that communicate with the liquid inlet and the liquid outlet, and the connecting pipes are used to connect to external pipelines.

[0010] As described above, in a disposable sampling pump, the side wall of the connecting pipe is provided with anti-slip texture. The anti-slip texture is annular grooves or raised patterns distributed along the circumference of the connecting pipe to increase the friction between the connecting pipe and the external hose.

[0011] As described above, in a disposable sampling pump, the outer wall of the elastomer is provided with a sealing ring, which is in a sealing fit with the inner wall of the sampling chamber.

[0012] As described above, a disposable sampling pump has a flip cover on one side of the lower shell and one side of the upper cover. A tube plug is provided on the inner surface of the flip cover. The tube plug is used to extend into and seal the port of the connecting tube when the flip cover is closed.

[0013] As described above, in a disposable sampling pump, the elastomer is provided with a plug, and one side of the pressing member is provided with a slot that matches the shape of the plug, and the plug is inserted into the slot with an interference fit.

[0014] As described above, in a disposable sampling pump, the pressing member has a pressing side, and the lower shell has a through hole with the same shape as the pressing side of the pressing member. The pressing side of the pressing member passes through the through hole and is exposed outside the outer shell.

[0015] Implementing the embodiments of this utility model has the following beneficial effects: 1. In this utility model, by setting a first one-way valve and a second one-way valve, and cooperating with a sampling mechanism with an elastic body and a limiting guide structure, the one-way intake and discharge of the liquid medicine is realized. The sliding cooperation between the connecting part of the pressing part and the matching part in the sampling chamber limits the pressing stroke, ensuring that the compression and recovery of the elastic body is constant in each sampling action, thereby realizing accurate and quantitative sampling of the liquid medicine. This structure avoids the volume error and contamination risk caused by manual operation, improves the sealing and repeatability of the sampling process, and is simple in structure and convenient in operation, making it suitable for liquid medicine sampling occasions with high sealing requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a disposable sampling pump according to this utility model.

[0018] Figure 2 This is an exploded view of a disposable sampling pump according to this utility model.

[0019] Figure 3 yes Figure 2 A structural diagram from another angle.

[0020] Figure 4 This is a schematic diagram of the sampling component of a disposable sampling pump according to this utility model.

[0021] Figure 5 yes Figure 4 A structural diagram from another angle.

[0022] Figure 6 This is a schematic diagram of the structure of the first one-way valve of a disposable sampling pump according to this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of the second one-way valve of a disposable sampling pump according to this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of the elastic body of a disposable sampling pump according to this utility model.

[0025] Figure 9 yes Figure 8 A structural diagram from another angle.

[0026] Figure 10 This is a schematic diagram of the pressing component of a disposable sampling pump according to this utility model.

[0027] Figure 11 This is a cross-sectional view of a disposable sampling pump according to this utility model.

[0028] Figure 12 This is a cross-sectional view of the first one-way valve of a disposable sampling pump according to this utility model.

[0029] Figure 13 This is a cross-sectional view of the second one-way valve of a disposable sampling pump according to this utility model.

[0030] As shown in the figure: 1. Outer shell; 11. Lower shell; 111. Groove; 112. Through hole; 113. Connecting pipe; 12. Upper cover plate; 13. Flip cover; 131. Pipe plug; 2. Sampling mechanism; 21. Sampling component; 211. Sampling chamber; 212. Matching part; 213. Liquid inlet; 214. Liquid outlet; 22. Elastomer; 221. Sealing ring; 222. Insert block; 23. Pressing component; 231. Connecting part; 232. Slot; 24. First one-way valve; 241. Plug ring; 242. V-groove; 243. Through groove; 25. Second one-way valve; 251. Cover plate; 252. Support ring. 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] like Figures 1 to 13As shown, this utility model proposes a disposable sampling pump, including a housing 1. A sampling mechanism 2 is installed inside the housing 1. The sampling mechanism 2 includes a sampling element 21. One end of the sampling element 21 has a liquid inlet 213, and the other end of the sampling element 21 has a liquid outlet 214. A second one-way valve 25 is provided at the end of the sampling element 21 with the liquid inlet 213. The second one-way valve 25 is used to control the unidirectional entry of fluid into the sampling element 21. A first one-way valve 24 is provided at the end of the sampling element 21 with the liquid outlet 214. The first one-way valve 24 is used to control the unidirectional discharge of fluid from the sampling element 21. The sample 21 has a sampling cavity 211, an elastic body 22 is disposed inside the sampling cavity 211, and a pressing member 23 that can move axially is provided on one side of the elastic body 22. A limiting guide structure is provided between the pressing member 23 and the sampling 21. The limiting guide structure is used to limit the movement stroke of the pressing member 23. The limiting guide structure includes a connecting part 231 disposed on the side wall of the pressing member 23 and a matching part 212 disposed on the side wall of the sampling cavity 211 that matches the shape of the connecting part 231. The matching part 212 is slidably connected to the connecting part 231. In use, pressing the pressing element 23 causes the connecting part 231 on its side wall to slide along the matching part 212 on the inner wall of the sampling chamber 211, compressing the elastic body 22 and creating positive pressure in the sampling chamber 211. At this time, the second one-way valve 25 at the inlet end closes, and the first one-way valve 24 at the outlet end opens, allowing the fluid in the chamber to be discharged from the outlet. After releasing the pressing element 23, the elastic body 22 returns to its original shape, creating negative pressure in the sampling chamber 211. At this time, the first one-way valve 24 closes, and the second one-way valve 25 opens, allowing the liquid medicine to be drawn into the sampling chamber 211 from the inlet. Due to the obstruction at one end of the matching part 212, the sliding stroke of the connecting part 231 is the same each time. By repeating the pressing and releasing actions, the quantitative intake and discharge of the liquid medicine can be achieved, completing accurate sampling.

[0033] Optionally, in some embodiments, the elastomer 22 is made of silicone.

[0034] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, a sealing ring 221 is provided on the outer wall of the elastomer 22, and the sealing ring 221 is in sealing fit with the inner wall of the sampling chamber 211. When the pressing member 23 is pressed, the elastomer 22 undergoes compression deformation in the sampling chamber 211. At this time, the sealing ring 221 remains tightly attached to the inner wall of the sampling chamber, preventing liquid from leaking from the gap between the elastomer and the chamber wall. During the rebound recovery process of the elastomer 22, the sealing ring 221 continues to maintain a sealing state, ensuring that a stable negative pressure environment is formed in the sampling chamber 211, thereby reliably drawing in a quantitative amount of drug solution through the second one-way valve.

[0035] Optionally, in some embodiments, the pressing member 23 is provided with a pressing side, and the lower shell 11 has a through hole 112 with the same shape as the pressing side of the pressing member 23. The pressing side of the pressing member 23 passes through the through hole 112 and is exposed outside the outer shell 1. By providing a through hole 112 that matches the shape of the pressing side of the pressing member, the movement direction of the pressing member can be effectively guided. At the same time, the pressing side is exposed outside the outer shell, which facilitates direct manual operation by the user and improves the convenience of human-computer interaction.

[0036] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the elastic body 22 is provided with a plug 222, and one side of the pressing member 23 is provided with a slot 232 that matches the shape of the plug 222. The plug 222 is inserted into the slot 232 with an interference fit. Through the interference fit connection between the plug 222 and the slot 232, a tight and stable connection between the pressing member 23 and the elastic body 22 is achieved, effectively avoiding the "empty press" phenomenon caused by loose or detached connections in traditional assembly, i.e., no response to pressing or failure of energy transmission, ensuring the synchronization and reliability of the pressing action and the deformation of the elastic body.

[0037] Furthermore, as a preferred embodiment of this utility model and not a limitation, the first one-way valve 24 is made of an elastic material. The first one-way valve 24 has a V-shaped groove 242 and a through groove 243 at its center. A plugging ring 241 is provided on the outer side of the first one-way valve 24. The side of the V-shaped groove 242 facing the through groove 243 is more inclined than the side facing the plugging ring 241. When the pressure in the sampling chamber 211 increases, due to the obstruction of the plugging ring 241 and the fact that the V-shaped groove 242 has a larger inclination angle on the side closer to the through groove 243 and the presence of the plugging ring 241 on the other side, the side wall of the V-shaped groove 242 closer to the through groove 243 is more prone to elastic deformation, causing the valve body to bend in the direction of liquid discharge, thereby opening the through groove 243 and realizing one-way liquid discharge. When the pressure is released, the V-shaped groove 242 returns to its original shape, and the plugging ring 241, under the action of elastic restoring force, re-presses the sealing surface, closes the through groove 243, and prevents liquid backflow.

[0038] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the second one-way valve 25 is made of an elastic material. The second one-way valve 25 includes a cover plate 251. The front side of the cover plate 251 is used to cover the port of the connecting pipe 113 provided on the upper cover plate 12, and the back side of the cover plate 251 is provided with a support ring 252. When a negative pressure is generated in the sampling chamber 211, the external atmospheric pressure pushes the cover plate 251 to deform, causing its front side to detach from the port of the connecting pipe 113 on the upper cover plate 12. At the same time, the support ring 252 undergoes elastic bending, opening the liquid inlet channel, and the liquid medicine enters the sampling chamber 211. When the pressure in the chamber recovers or increases, the cover plate 251 returns to its original position under the action of its own elasticity and fluid pressure. The support ring 252 restores its deformation and pushes the cover plate 251 to tightly fit the port of the connecting pipe 113, achieving a seal and preventing liquid backflow or leakage.

[0039] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the matching part 212 is a groove formed on the side wall of the sampling chamber 211, and the connecting part 231 is a slider disposed on the side wall of the pressing member 23, the slider slidingly engaging with the groove. When the pressing member 23 is pressed, the slider slides within the groove. Due to the end structure at one end of the groove, the movement stroke of the slider is precisely limited and cannot continue forward; after release, under the reset action of the elastic body 22, the slider returns to its initial position along the groove. Since each press ends at the end of the groove, the consistency of the pressing displacement is ensured, improving the quantitative accuracy of the sampling pump.

[0040] Optionally, in some embodiments, the matching part 212 is a slider disposed on the side wall of the sampling chamber 211, and the connecting part 231 is a groove disposed on the side wall of the pressing member 23, wherein the slider and the groove are slidably engaged.

[0041] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the outer shell 1 includes a lower shell 11, one end of which is provided with an upper cover plate 12. A second one-way valve 25 is disposed between the upper cover plate 12 and the sampling member 21, and a first one-way valve 24 is disposed between the sampling member 21 and one end of the inner cavity of the lower shell 11. The upper cover plate 12 and the lower shell 11 are respectively provided with connecting pipes 113 communicating with the liquid inlet 213 and the liquid outlet 214. The connecting pipes 113 are used to connect to an external hose. The sidewall of the connecting pipe 113 is provided with anti-slip texture, which is an annular groove or raised texture distributed along the circumference of the connecting pipe to increase the friction between the connecting pipe and the external hose. When the pressing member 23 is pressed, the pressure change in the sampling chamber 211 drives the first and second one-way valves to open and close alternately, realizing the one-way intake and discharge of the medicine. The outer wall of the connecting pipe 113 is provided with anti-slip texture. When connected to an external hose, the annular groove or raised structure on its surface enhances the friction of the contact surface, preventing the pipe from falling off due to vibration or pressure changes.

[0042] Furthermore, as a preferred embodiment of this utility model and not a limitation, a flip cover 13 is provided on one side of the lower shell 11 and one side of the upper cover plate 12. A pipe plug 131 is provided on the inner surface of the flip cover 13. The pipe plug 131 is used to extend into and seal the port of the connecting pipe 113 when the flip cover 13 is fastened. When the sampling pump leaves the factory, the flip cover 13 is already in the fastened state, and the pipe plug 131 on it is already inserted into the corresponding port of the connecting pipe 113, realizing the pre-sealing of the inlet and outlet. In use, the flip cover 13 must be opened first to expose the connecting pipe 113 before the pipeline can be connected for sampling operation. This achieves factory-level protection for the inlet and outlet of the sampling pump, effectively preventing dust contamination, liquid evaporation, or foreign object entry during transportation.

[0043] Optionally, in some embodiments, a groove 111 is provided on one side of the lower shell 11 and one side of the upper cover 12. The groove 111 is located in the adjacent area of ​​the flip cover 13, and its opening direction faces the opening side of the flip cover. This allows the user to insert their fingers and apply force to the edge of the flip cover 13, thereby easily prying or lifting the flip cover to quickly expose the port of the connecting pipe 113.

[0044] Example 1: This utility model discloses a disposable sampling pump, including a housing 1, within which a sampling mechanism 2 is installed. The sampling mechanism 2 includes a sampling element 21, with an inlet 213 at one end and an outlet 214 at the other end. A second check valve 25 is provided at the end of the sampling element 21 with the inlet 213, which controls the unidirectional flow of fluid into the sampling element 21. A first one-way valve 24 is provided to control the one-way discharge of fluid from the sampling component 21. The sampling component 21 has a sampling chamber 211, and an elastic body 22 is provided inside the sampling chamber 211. A pressing member 23 that can move axially is provided on one side of the elastic body 22. A connecting part 231 is provided on the side wall of the pressing member 23. A matching part 212 that matches the shape of the connecting part 231 is provided on the side wall of the sampling chamber 211. The matching part 212 is slidably connected to the connecting part 231. In use, pressing the pressing element 23 causes the connecting part 231 on its side wall to slide along the matching part 212 on the inner wall of the sampling chamber 211, compressing the elastic body 22 and creating positive pressure in the sampling chamber 211. At this time, the second one-way valve 25 at the inlet end closes, and the first one-way valve 24 at the outlet end opens, allowing the fluid in the chamber to be discharged from the outlet. After releasing the pressing element 23, the elastic body 22 returns to its original shape, creating negative pressure in the sampling chamber 211. At this time, the first one-way valve 24 closes, and the second one-way valve 25 opens, allowing the liquid medicine to be drawn into the sampling chamber 211 from the inlet. Due to the obstruction at one end of the matching part 212, the sliding stroke of the connecting part 231 is the same each time. By repeating the pressing and releasing actions, the quantitative intake and discharge of the liquid medicine can be achieved, completing accurate sampling. The pressing component 23 has a pressing side, and the lower shell 11 has a through hole 112 with the same shape as the pressing side of the pressing component 23. The pressing side of the pressing component 23 passes through the through hole 112 and is exposed outside the outer shell 1. By setting the through hole 112 that matches the shape of the pressing side of the pressing component, the movement direction of the pressing component can be effectively guided. At the same time, the pressing side is exposed outside the outer shell, which is convenient for users to operate directly by hand, improving the convenience of human-computer interaction. In this embodiment, the material of the elastomer 22 is preferably medical-grade silicone. This silicone material has excellent resilience, fatigue resistance, and good biocompatibility and chemical stability. It can maintain stable mechanical properties after multiple compression and recovery cycles, ensuring the consistency and accuracy of the sampling volume of the sampling pump during long-term or high-frequency use.

[0045] The matching part 212 is a groove formed on the side wall of the sampling chamber 211, and the connecting part 231 is a slider provided on the side wall of the pressing member 23. The slider slides in conjunction with the groove. When the pressing member 23 is pressed, the slider slides in the groove. Due to the end structure at one end of the groove, the movement stroke of the slider is precisely limited and cannot continue forward. After being released, under the reset action of the elastic body 22, the slider returns to its initial position along the groove. Since each press ends at the end of the groove, the consistency of the pressing displacement is ensured, and the quantitative accuracy of the sampling pump is improved.

[0046] The elastomer 22 is provided with a plug 222, and a slot 232 matching the shape of the plug 222 is provided on one side of the pressing member 23. The plug 222 is inserted into the slot 232 with an interference fit. Through the interference fit connection between the plug 222 and the slot 232, a tight and stable connection between the pressing member 23 and the elastomer 22 is achieved, which effectively avoids the "empty press" phenomenon caused by loose or detached connection in traditional assembly, i.e., no response or failure of energy transmission when pressing, and ensures the synchronization and reliability of pressing action and elastomer deformation.

[0047] A sealing ring 221 is provided on the outer wall of the elastomer 22, and the sealing ring 221 is in a sealing fit with the inner wall of the sampling chamber 211. When the pressing member 23 is pressed, the elastomer 22 undergoes compression deformation in the sampling chamber 211. At this time, the sealing ring 221 always adheres tightly to the inner wall of the sampling chamber, preventing liquid from leaking from the gap between the elastomer and the chamber wall. During the rebound recovery process of the elastomer 22, the sealing ring 221 continues to maintain a sealing state, ensuring that a stable negative pressure environment is formed in the sampling chamber 211, thereby reliably drawing in a quantitative amount of drug solution through the second one-way valve.

[0048] The first one-way valve 24 is made of elastic material. It has a V-groove 242 and a through-slot 243 at its center. A plugging ring 241 is located on the outer side of the first one-way valve 24. The side of the V-groove 242 facing the through-slot 243 is more inclined than the side facing the plugging ring 241. When the pressure inside the sampling chamber 211 increases, due to the obstruction of the plugging ring 241 and the greater inclination angle of the V-groove 242 near the through-slot 243, and the presence of the plugging ring 241 on the other side, the sidewall of the V-groove 242 near the through-slot 243 is more prone to elastic deformation. This causes the valve body to bend in the direction of liquid discharge, thereby opening the through-slot 243 and enabling one-way liquid discharge. When the pressure is released, the V-groove 242 returns to its original shape, and the plugging ring 241, under the action of elastic restoring force, re-presses the sealing surface, closing the through-slot 243 and preventing liquid backflow. The second one-way valve 25 is made of an elastic material and includes a cover plate 251. The front of the cover plate 251 is used to cover the port of the connecting pipe 113 provided on the upper cover plate 12, and the back of the cover plate 251 is provided with a support ring 252. When a negative pressure is generated in the sampling chamber 211, the external atmospheric pressure pushes the cover plate 251 to deform, causing its front to detach from the port of the connecting pipe 113 on the upper cover plate 12. At the same time, the support ring 252 undergoes elastic bending, opening the liquid inlet channel, and the medicine enters the sampling chamber 211 through this opening. When the pressure in the chamber recovers or increases, the cover plate 251 returns to its original position under the action of its own elasticity and fluid pressure. The support ring 252 restores its deformation and pushes the cover plate 251 to tightly fit the port of the connecting pipe 113, achieving a seal and preventing liquid backflow or leakage.

[0049] The outer casing 1 includes a lower casing 11, with an upper cover plate 12 at one end. A second one-way valve 25 is located between the upper cover plate 12 and the sampling component 21, and a first one-way valve 24 is located between the sampling component 21 and one end of the inner cavity of the lower casing 11. The upper cover plate 12 and the lower casing 11 are respectively provided with connecting pipes 113 communicating with the inlet 213 and the outlet 214, respectively. The connecting pipes 113 are used to connect to an external hose. The sidewall of the connecting pipe 113 is provided with anti-slip textures, which are annular grooves or raised patterns distributed along the circumference of the connecting pipe, used to increase the friction between the connecting pipe and the external hose. When the pressing element 23 is pressed, the pressure change in the sampling chamber 211 drives the first and second one-way valves to open and close alternately, realizing one-way intake and discharge of the drug solution. The outer wall of the connecting pipe 113 is provided with anti-slip textures. When connected to the external hose, the annular grooves or raised structures on its surface enhance the friction of the contact surface, preventing the pipe from falling off due to vibration or pressure changes. Both the lower housing 11 and the upper cover 12 are provided with a flip cover 13 on one side. A pipe plug 131 is provided on the inner surface of the flip cover 13. The pipe plug 131 is used to extend into and seal the port of the connecting pipe 113 when the flip cover 13 is closed. When the sampling pump leaves the factory, the flip cover 13 is already in the closed state, and the pipe plug 131 is inserted into the corresponding port of the connecting pipe 113, achieving pre-sealing of the inlet and outlet. During use, the flip cover 13 must be opened first to expose the connecting pipe 113 before connecting the pipeline for sampling. This provides factory-grade protection for the sampling pump's inlet and outlet, effectively preventing dust contamination, liquid evaporation, or foreign object entry during transportation.

[0050] Example 2: Based on Embodiment 1, this utility model further provides a disposable sampling pump with an optimized structure. Unlike Embodiment 1, in this embodiment, a groove 111 is provided on one side of the lower shell 11 and one side of the upper cover 12. The groove 111 is located in the adjacent area of ​​the flip cover 13, and its opening direction faces the opening side of the flip cover. This groove 111 forms an operating space that facilitates finger insertion. Users can insert their fingernails or fingertips into the groove and easily apply force to the edge of the flip cover 13, thereby achieving quick and effortless opening of the flip cover. This design significantly improves operational convenience, especially suitable for medical operation scenarios involving gloves, sterile environments, or limited space, effectively avoiding opening difficulties caused by a small flip cover or a smooth surface.

[0051] Specifically, the working principle of this utility model is as follows: When using a disposable sampling pump, the first step is to open the flip cover 13 located on the lower shell 11 and the upper cover plate 12, allowing the tube plug 131 on the inner surface of the flip cover to disengage from the port of the connecting pipe 113, thereby exposing the inlet and outlet for connection to the external sampling pipeline. At this point, the sampling pump enters the standby state. Before formal sampling, a pre-operation is required: press the pressing element 23 three times consecutively to complete the initial suction and discharge cycle of the sampling chamber 211. Since air or incomplete liquid filling may exist in the sampling chamber at the factory, the purpose of the first three presses is not to obtain a sample, but to repeatedly compress and release the elastomer 22 to expel air bubbles in the chamber, ensuring that the liquid fully fills the sampling chamber and ensuring the accuracy and consistency of subsequent sampling volumes.

[0052] After completing the first three pre-drainage operations, the internal fluid channel of the sampling pump is completely filled with the drug solution and enters a stable working state. Thereafter, each pressing and releasing action enables precise quantitative sampling. The specific working process is as follows: When the pressing element 23 is pressed down, the slider connection part 231 on its side wall slides along the sliding groove matching part 212 in the sampling chamber 211, compressing the elastic body 22 and increasing the pressure inside the sampling chamber. At this time, the first one-way valve 24 at the outlet opens due to pressure, while the second one-way valve 25 at the inlet remains closed. The drug solution is discharged from the outlet. After releasing the pressing element, the elastic body 22 returns to its original deformation, creating a negative pressure inside the sampling chamber. The first one-way valve 24 closes to prevent backflow, and the second one-way valve 25 opens under the action of external atmospheric pressure, allowing the drug solution to be drawn into the chamber from the inlet. Because the end of the chute is equipped with a travel limit, the displacement is fixed each time it is pressed. Combined with the effective sealing of the gap between the elastomer and the cavity wall by the sealing ring 221, it ensures that the volume of liquid sucked in and discharged each time is consistent, thus achieving high-precision quantitative control.

[0053] Furthermore, multiple structural designs work together to ensure the reliability and cleanliness of the entire sampling process. The elastomer 22 is connected to the slot 232 of the pressing component 23 via an interference fit with the insert 222, avoiding "empty pressing" and ensuring efficient and stable force transmission. The asymmetrical inclined structure of the V-groove 242 of the first one-way valve 24 makes it responsive and quick to open and close, while the outer peripheral sealing ring 241 enhances the sealing and backflow prevention capabilities. The cover 251 of the second one-way valve 25 cooperates with the support ring 252 to achieve negative pressure opening and positive pressure self-sealing, preventing contamination and leakage. The anti-slip texture on the outer wall of the connecting pipe 113 effectively prevents the hose from falling off, improving connection reliability. The entire device is compact and easy to operate. The three pre-sorting designs ensure sampling accuracy, and the flip-top sealing structure ensures safe storage and transportation. It is particularly suitable for quantitative sampling of highly sealed liquids in medical and pharmaceutical applications where high precision and cleanliness are required.

[0054] In summary, this invention solves the problems of inaccurate sampling volume, easy contamination, and difficulty in quantitative control caused by manual operation in the sampling process of existing high-sealing liquid medicines.

[0055] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0056] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A disposable sampling pump, comprising a housing (1), wherein a sampling mechanism (2) is installed within the housing (1), characterized in that, The sampling mechanism (2) includes a sampling element (21). One end of the sampling element (21) has a liquid inlet (213), and the other end of the sampling element (21) has a liquid outlet (214). A second one-way valve (25) is provided at the end of the sampling element (21) with the liquid inlet (213). The second one-way valve (25) is used to control the fluid to enter the sampling element (21) in one direction. A first one-way valve is provided at the end of the sampling element (21) with the liquid outlet (214). (24) The first one-way valve (24) is used to control the fluid to be discharged unidirectionally from the sampling member (21). The sampling member (21) has a sampling chamber (211). An elastic body (22) is provided in the sampling chamber (211). A pressing member (23) that can move axially is provided on one side of the elastic body (22). A limiting guide structure is provided between the pressing member (23) and the sampling member (21). The limiting guide structure is used to limit the movement stroke of the pressing member (23).

2. The disposable sampling pump according to claim 1, characterized in that, The limiting guide structure includes a connecting part (231) disposed on the side wall of the pressing member (23) and a matching part (212) disposed on the side wall of the sampling chamber (211) that matches the shape of the connecting part (231). The matching part (212) is slidably connected to the connecting part (231).

3. A disposable sampling pump according to claim 1, characterized in that, The first check valve (24) is made of elastic material. The first check valve (24) has a V-groove (242) and a through groove (243) at the center. A plug ring (241) is provided on the outside of the first check valve (24). The side of the V-groove (242) facing the through groove (243) is more inclined than the side facing the plug ring (241).

4. A disposable sampling pump according to claim 1, characterized in that, The second check valve (25) is made of an elastic material and includes a cover plate (251) with a support ring (252) on the back side of the cover plate (251).

5. A disposable sampling pump according to claim 2, characterized in that, The matching part (212) is a groove formed on the side wall of the sampling chamber (211), and the connecting part (231) is a slider provided on the side wall of the pressing member (23), and the slider slides in conjunction with the groove.

6. A disposable sampling pump according to claim 1, characterized in that, The outer shell (1) includes a lower shell (11), one end of which is provided with an upper cover plate (12). The second one-way valve (25) is provided between the upper cover plate (12) and the sampling member (21). The first one-way valve (24) is provided between the sampling member (21) and one end of the inner cavity of the lower shell (11). The upper cover plate (12) and the lower shell (11) are respectively provided with connecting pipes (113) communicating with the liquid inlet (213) and the liquid outlet (214). The connecting pipes (113) are used to connect to external hoses. A flip cover (13) is provided on one side of the lower shell (11) and one side of the upper cover plate (12). A pipe plug (131) is provided on the inner surface of the flip cover (13). The pipe plug (131) is used to extend into and seal the port of the connecting pipe (113) when the flip cover (13) is fastened.

7. A disposable sampling pump according to claim 6, characterized in that, The sidewall of the connecting pipe (113) is provided with anti-slip texture, which is an annular groove or raised texture distributed along the circumference of the connecting pipe to increase the friction between the connecting pipe and the external hose.

8. A disposable sampling pump according to claim 1, characterized in that, The outer wall of the elastomer (22) is provided with a sealing ring (221), which is sealed to the inner wall of the sampling chamber (211).

9. A disposable sampling pump according to claim 1, characterized in that, The elastic body (22) is provided with a plug (222), and a slot (232) matching the shape of the plug (222) is provided on one side of the pressing member (23), and the plug (222) is inserted into the slot (232) with an interference fit.

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