Torsion test equipment of matching device of liquid injection pump for microfluidic system

Abstract

The utility model relates to torsion testing equipment of a matching device of a liquid injection pump for a microfluidic system, which comprises a machine table, a torsion testing machine is arranged on the table top of the machine table, the torsion testing machine comprises an output end used for being connected with a screw rod of the matching device in a matched mode, and the axial direction of the output end is in a first direction X; the jig comprises a base and a sliding seat, the base is fixed to the table top, the sliding seat can be assembled on the base in a sliding mode in the second direction Y, the sliding seat is used for containing a matched device, and the second direction Y is perpendicular to the first direction X; an output part of the driving mechanism is connected with the sliding seat, and the driving mechanism is used for driving the sliding seat to slide relative to the base in the second direction Y; the propelling mechanism is connected with the torsion testing machine and is used for driving the torsion testing machine to move along the first direction X; the torsion testing equipment further comprises a control system used for controlling the torsion testing machine, the driving mechanism and the propelling mechanism to work, the testing efficiency can be improved, and the accuracy of the final position of the piston rod can be guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of biochemical analysis equipment, and in particular to a torque testing device for a supporting device of an injection pump for a microfluidic system. Background Art

[0002] Microfluidics is a system that uses microchannels to process or manipulate tiny fluids. Microfluidics can achieve a series of micro-machining and micro-operations that are difficult to accomplish with conventional methods. At present, microfluidic chips have been widely used in technical fields such as digital PCR and gene sequencing. Among them, the injection pump (syringe pump) in the microfluidic system is an important device for pushing or extracting the liquid sample to be transferred. The driving device of the pump is a key factor that directly affects the pushing, extraction pressure and liquid delivery accuracy.

[0003] Chinese Patent Publication No. 202010097159.5 discloses a liquid injection pump driving device for a microfluidic system, which together with 5 sets of supporting devices constitutes a liquid injection pump for a microfluidic system. The supporting device is fixed near the liquid injection port of the microfluidic chip by means of a buckle 511. The internally threaded nut 503 is installed in the guide sleeve 504, and the guide sleeve 504 is fixed in the cavity formed by the shell 505 and the sheath 501; one end of the cavity is connected to the sample addition hole 507 and the reagent outlet 509, and a piston 506 with a sealing ring 510 is also arranged inside the cavity; the piston rod 502 has an external thread and is movably connected to the nut 503, wherein there is a circumferential direction limiting structure between the piston rod 502 and the guide sleeve 504, wherein the supporting device includes a piston rod 502, an internally threaded nut 503 (also called a spiral rod), and a guide sleeve 504, the internally threaded nut 503 is installed in the guide sleeve 504, and the piston rod 502 has an external thread and is movably connected to the nut 503. The piston rod 502, the internal thread nut 503, and the guide sleeve 504 are assembled into a plug rod piston assembly and then placed into the housing 505. Figure 3 It can be seen that when the piston rod 502 moves to the left, it pushes the reagent to flow into the microfluidic chip through the reagent outlet 509 .

[0004] In the above scheme, the housings of the five sets of matching devices can be formed as an integral part or assembled together. Before use, it is necessary to test the relative rotation smoothness of the internal threaded nut 503 and the piston rod 502 in the five sets of screw rod piston groups, and rotate the five piston rods to their set initial positions. At present, the smoothness is measured by hand, and then each piston rod is rotated to its set initial position, which makes it difficult to ensure the final position of the piston rod; and because it is necessary to switch and test the piston rod in multiple sets of matching devices, the existing method is inefficient. Utility Model Content

[0005] Based on this, it is necessary to propose a torque testing device for the screw rod piston group of the injection pump for the microfluidic system to address the problems of low torque testing efficiency of the screw rod piston group and inaccurate final position positioning of the piston rod.

[0006] According to one aspect of the present disclosure, a torque testing device for a supporting device of an injection pump for a microfluidic system, the supporting device includes a housing and multiple groups of screw rod piston groups, the screw rod piston group includes a guide sleeve, a screw rod and a piston rod, the screw rod is rotatably installed in the guide sleeve, the screw rod is threadedly connected to the piston rod, the torque testing device includes a machine table, and the table of the machine table is provided with: a torque testing machine, the torque testing machine includes an output end for matching with the screw rod to transmit torque, the axial direction of the output end is along a first direction; a fixture, located on one side of the output end, the fixture includes a base, a sliding seat , the base is fixed on the table top, the sliding seat is slidably assembled on the base along a second direction, the sliding seat is used to place the supporting device, and the second direction is perpendicular to the first direction; a driving mechanism, the output part of the driving mechanism is connected to the sliding seat, and the driving mechanism is used to drive the sliding seat to slide relative to the base along the second direction; and a propulsion mechanism, the propulsion mechanism is connected to the torque testing machine, and is used to drive the torque testing machine to move along the first direction; the torque testing equipment also includes a control system for controlling the operation of the torque testing machine, the driving mechanism and the propulsion mechanism.

[0007] In some embodiments, the propulsion mechanism includes a mounting seat, a propulsion motor, and a support frame, the support frame is movably mounted on the mounting seat, the torque testing machine is mounted on the support frame, and the output shaft of the propulsion motor abuts against the support frame.

[0008] In some embodiments, a vertical plate is connected to the mounting seat, the propulsion motor is fixed to the vertical plate, and the output shaft of the propulsion motor passes through the vertical plate.

[0009] In some embodiments, a coupling and a joint are further included. The support frame includes a support plate. The coupling connects the output end of the torque testing machine and the joint. The joint is penetrated through the support plate and is used to connect the screw rod.

[0010] In some embodiments, a groove is provided at the bottom of the sliding seat, and a guide block is provided at the base for relative sliding engagement with the groove.

[0011] In some of the embodiments, a trigger member is connected to the sliding seat, and a detection unit is also provided on the table top. In response to the sliding seat sliding along the second direction, the detection unit is triggered and sends a position signal of the sliding seat in the second direction to the control system. The control system controls the operation of the propulsion mechanism and the torque testing machine according to the position signal, so that the torque testing machine can be matched with the first of the multiple spiral rods.

[0012] In some embodiments, the detection unit is disposed on a side of the fixture facing away from the torque testing machine.

[0013] In some embodiments, the trigger member is detachably connected to a side of the sliding seat facing away from the torque testing machine.

[0014] In some embodiments, the detection unit includes a first induction switch and a second induction switch spaced apart along the second direction.

[0015] In some of the embodiments, a display screen is also provided on the table top, and the display screen is communicatively connected with the control system.

[0016] The torque test equipment can be used to sequentially drive the rotation of multiple spiral rods, thereby completing the test of the relative rotation smoothness of multiple spiral rods and the piston rod. In this way, the test efficiency can be improved and the accuracy of the final position of the piston rod can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly of the supporting device of the injection pump for the microfluidic system disclosed in the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the assembly of the screw rod piston group in the supporting device.

[0019] Figure 3 It is a structural schematic diagram of a torque testing device of a supporting device of an injection pump for a microfluidic system disclosed in the present invention.

[0020] Figure 4 yes Figure 3 A schematic diagram of the structure of the torque testing equipment from another angle, in which some components such as the machine are hidden.

[0021] Reference numerals:

[0022] 1. Matching device; 101. Shell; 102. Screw rod piston group; 1021. Guide sleeve; 1022. Screw rod; 1023. Piston rod; 100. Torque testing equipment; 10. Machine; 110. Table; 20. Torque testing machine; 210. Output end; 30. Fixture; 310. Base; 311. Guide block; 320. Sliding seat; 321. Groove; 330. Trigger; 340. Detection unit; 341. First induction switch; 342. Second induction switch; 40. Driving mechanism; 410. Output part; 50. Propulsion mechanism; 510. Mounting seat; 511. Vertical plate; 520. Propulsion motor; 521. Output shaft; 530. Support frame; 531. Support plate; 60. Control system; 710. Coupling; 720. Joint; 80. Display screen. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present disclosure, so the present disclosure is not limited by the specific embodiments disclosed below.

[0024] In the description of the present disclosure, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0025] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] The present disclosure provides a torque test device 100 of a microfluidic system injection pump supporting device 1. For ease of understanding, first, the test object of the torque test device 100 of the present disclosure is briefly described. Figure 1 and Figure 2 As shown, the supporting device 1 includes a housing 101 and multiple groups of screw rod piston groups 102 arranged in the housing 101. The specific application scenarios of the supporting device 1 can be referred to the background technology, which will not be repeated here. The screw rod piston group 102 includes a guide sleeve 1021, a screw rod 1022 and a piston rod 1023, the screw rod 1022 can be rotatably installed in the guide sleeve 1021, and the screw rod 1022 is threadedly connected to the piston rod 1023. Figure 1 In the figure, it is exemplarily shown that five screw rod piston groups 102 are arranged in the housing 101, but it is easy to understand that the number of the screw rod piston groups 102 is not limited to this example.

[0027] The following describes an implementation of a torque testing device 100 of the supporting device 1 of the injection pump for a microfluidic system disclosed in the present invention in conjunction with the accompanying drawings.

[0028] like Figure 3 and Figure 4 As shown, the torque testing device 100 includes a machine platform 10, and a torque testing machine 20, a fixture 30, a driving mechanism 40 and a propulsion mechanism 50 are arranged on the table 110 of the machine platform 10. The torque testing device 100 also includes a control system 60 for controlling the operation of the torque testing machine 20, the driving mechanism 40 and the propulsion mechanism 50. Optionally, the control system 60 is arranged inside the machine platform 10.

[0029] The torque tester 20 includes an output end 210 for coupling with the screw rod 1022 to transmit torque, and the axial direction of the output end 210 is along the first direction X. The torque tester 20 can rotate around its own axis, so as to drive the screw rod 1022 to rotate when coupled with the screw rod 1022 .

[0030] The fixture 30 is located at one side of the output end 210. The fixture 30 includes a base 310 and a sliding seat 320. The base 310 is fixed on the table 110. The sliding seat 320 is assembled to the base 310 slidably along the second direction Y. The sliding seat 320 is used to place the matching device 1. The second direction Y is perpendicular to the first direction X.

[0031] The top of the sliding seat 320 is used to place and fix the supporting device 1. The way in which the sliding seat 320 fixes the supporting device 1 is not limited. Exemplarily, the top of the sliding seat 320 is provided with a concave-convex structure that conforms to the bottom contour shape of the housing 101 of the supporting device 1, so that the supporting device 1 can be embedded in the top of the sliding seat 320. Exemplarily, the top of the sliding seat 320 is provided with a fixing fixture, such as a pneumatic pressure block, which is used to press the housing 101 of the supporting device 1 onto the sliding seat 320.

[0032] The output portion 410 of the driving mechanism 40 is connected to the sliding seat 320 , and the driving mechanism 40 is used to drive the sliding seat 320 to slide relative to the base 310 along the second direction Y. The type of the driving mechanism 40 is not limited, as long as it can move the sliding seat 320 along the second direction Y.

[0033] The propulsion mechanism 50 is connected to the torque tester 20 and is used to drive the torque tester 20 to move along the first direction X. The specific type of the propulsion mechanism 50 is not limited, and it only needs to be able to drive the torque tester 20 to move along the first direction X.

[0034] The working principle of the torque testing device 100 is as follows: the matching device 1 is placed and fixed on the sliding seat 320, and the axial direction of the screw rod 1022 is parallel to the first direction X, that is, parallel to the axial direction of the output end 210. The control system 60 controls the torque testing machine 20, the driving mechanism 40 and the propulsion mechanism 50 to work. In the process of the driving mechanism 40 pushing the sliding seat 320 to move along the second direction Y, the plurality of screw rods 1022 can be sequentially opposite to the output end 210 of the torque testing machine 20 in the first direction X. The propulsion mechanism 50 pushes the torque testing machine 20 to move toward the screw rod 1022, so that the output end 210 cooperates with the end of the screw rod 1022 to transmit torque. The driving mechanism 40 then controls the torque testing machine 20 to work, so that the output end 210 drives the screw rod 1022 to rotate relative to the piston rod 1023, thereby being able to test the relative rotation smoothness of the screw rod 1022 and the piston rod 1023. Furthermore, after the test is completed, the screw can be driven to rotate according to a preset program so that the piston rod 1023 moves to the respective required initial position.

[0035] The torque testing device 100 can sequentially drive the rotation of the plurality of spiral rods 1022, thereby completing the test of the relative rotation smoothness between the plurality of spiral rods 1022 and the piston rod 1023. In this way, the test efficiency can be improved and the accuracy of the final position of the piston rod 1023 can be ensured.

[0036] In some embodiments, the propulsion mechanism 50 includes a mounting base 510 , a propulsion motor 520 , and a support frame 530 . The support frame 530 is movably mounted on the mounting base 510 , the torque testing machine 20 is mounted on the support frame 530 , and the output shaft 521 of the propulsion motor 520 abuts against the support frame 530 .

[0037] In this embodiment, the torque tester 20 is set on the support frame 530, the output end 210 of the torque tester 20 is raised, and the support frame 530 is driven by the propulsion motor 520 to drive the torque tester 20 to move so that it can dock with the spiral rod 1022.

[0038] In some embodiments, a vertical plate 511 is connected to the mounting seat 510, a propulsion motor 520 is fixed to the vertical plate 511, and an output shaft 521 of the propulsion motor 520 is passed through the vertical plate 511. Specifically, a vertical plate 511 is provided at one end of the mounting seat 510 facing away from the fixture 30. The propulsion motor 520 pushes the support frame 530 from one side. In this way, the torque tester 20 and the propulsion mechanism 50 can be integrated together.

[0039] In some embodiments, a coupling 710 and a joint 720 are further included. The support frame 530 includes a support plate 531. The coupling 710 connects the output end 210 of the torque testing machine 20 and the joint 720. The joint 720 is passed through the support plate 531 and is used to connect the spiral rod 1022.

[0040] The joint 720 is rotatably supported on the support plate 531. By providing the coupling 710, the joint 720 can be connected to the output end 210 of the torque tester 20 and transmitted to the screw rod 1022, so that the structure of the output end 210 of the torque tester 20 does not need to be changed.

[0041] In some embodiments, the bottom of the sliding seat 320 is provided with a groove 321, and the base 310 is provided with a guide block 311 that slides relatively with the groove 321. In this way, the sliding seat 320 can be slidably connected to the base 310.

[0042] In some embodiments, a trigger member 330 is connected to the sliding seat 320, and a detection unit 340 is also provided on the table 110. In response to the sliding seat 320 sliding along the second direction Y, the detection unit 340 is triggered and sends a position signal of the sliding seat 320 in the second direction Y to the control system 60. The control system 60 controls the operation of the driving mechanism 40 and the torque tester 20 according to the position signal, so that the torque tester 20 can be matched with the first one of the multiple spiral rods 1022. The detection unit 340 can be contact or non-contact, such as a micro switch, a photoelectric switch, etc.

[0043] During the sliding of the sliding seat 320 along the second direction Y, when the detection unit 340 is triggered, the first one of the plurality of spiral rods 1022 is configured to be aligned with the output end 210 of the torque tester 20, so that the control system 60 can control the propulsion mechanism 50 and the torque tester 20 to work, so that the output end 210 of the torque tester 20 docks with the first spiral rod 1022 and transmits torque. In the present disclosure, the first one of the plurality of spiral rods 1022 refers to the first spiral rod 1022 that is aligned with the output end 210 of the torque tester 20 when the sliding seat 320 moves along the second direction Y so that the plurality of spiral rods 1022 are aligned with the output end 210 of the torque tester 20 in sequence. Exemplarily, when the driving mechanism 40 is disposed on one side of the sliding seat 320 in the second direction Y, the first one of the plurality of spiral rods 1022 refers to the spiral rod 1022 that is farthest from the driving mechanism 40.

[0044] The docking of other spiral rods 1022 among the plurality of spiral rods 1022 with the output end 210 of the torque testing machine 20 can be configured based on the spacing between adjacent spiral rods 1022. For example, the control system 60 controls the time interval for the sliding seat 320 to slide again along the second direction Y according to the spacing between adjacent spiral rods 1022, so that each spiral rod 1022 can be aligned with the output end 210 of the torque testing machine 20.

[0045] Specifically, the detection unit 340 is disposed on the side of the fixture 30 facing away from the torque tester 20. The trigger member 330 is detachably connected to the side of the sliding seat 320 facing away from the torque tester 20. The detection unit 340 and the trigger member 330 do not affect the docking of the torque tester 20 and the spiral rod 1022.

[0046] Further, the detection unit 340 includes a first induction switch 341 and a second induction switch 342 which are arranged at intervals along the second direction Y. The first induction switch 341 and the second induction switch 342 are assigned positions to determine the starting working position of the sliding seat 320. Specifically, when the first induction switch 341 is triggered, it indicates that the first screw rod 1022 is aligned with the output end 210 of the torque tester 20; when the second induction switch 342 is triggered, it indicates that the last screw rod 1022 is aligned with the output end 210 of the torque tester 20.

[0047] By setting the first induction switch 341 and the second induction switch 342, the starting working position of the sliding seat 320 can be determined, thereby improving the working efficiency. For example, before the first induction switch 341 is triggered, the driving mechanism 40 can drive the sliding seat 320 to move forward at a faster speed. When the second induction switch 342 is triggered, the driving mechanism 40 can drive the sliding seat 320 to move backward at a faster speed.

[0048] In some embodiments, a display screen 80 is further provided on the table 110, and the display screen 80 is in communication with the control system 60. The display screen 80 is used to display various working information, such as the position information of the sliding seat 320, the output torque information of the torque tester 20, and the like.

[0049] In the present disclosure, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0050] In the present disclosure, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or the like, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this disclosure are for illustrative purposes only and do not represent the only implementation method.

[0052] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A torque test device for a supporting device of an injection pump for a microfluidic system, the supporting device comprising a housing and a plurality of screw rod piston groups, the screw rod piston group comprising a guide sleeve, a screw rod and a piston rod, the screw rod being rotatably mounted in the guide sleeve, the screw rod being threadedly connected to the piston rod, characterized in that: The torque testing device comprises a machine platform, on the table of the machine platform there are: A torque testing machine, the torque testing machine comprising an output end for coupling with the spiral rod to transmit torque, the axial direction of the output end being along a first direction; A fixture, located at one side of the output end, the fixture comprising a base and a sliding seat, the base being fixed on the table, the sliding seat being slidably assembled on the base along a second direction, the sliding seat being used to place the matching device, the second direction being perpendicular to the first direction; a driving mechanism, wherein an output portion of the driving mechanism is connected to the sliding seat, and the driving mechanism is used to drive the sliding seat to slide relative to the base along the second direction; and A propulsion mechanism, the propulsion mechanism is connected to the torque testing machine and is used to drive the torque testing machine to move along the first direction; The torque testing device also includes a control system for controlling the operation of the torque testing machine, the driving mechanism and the propulsion mechanism.

2. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 1, characterized in that: The propulsion mechanism comprises a mounting seat, a propulsion motor, and a support frame. The support frame is movably mounted on the mounting seat, the torque testing machine is mounted on the support frame, and the output shaft of the propulsion motor abuts against the support frame.

3. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 2, characterized in that: The mounting seat is connected with a vertical plate, the propulsion motor is fixed to the vertical plate, and the output shaft of the propulsion motor passes through the vertical plate.

4. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 2, characterized in that: It also includes a coupling and a joint. The support frame includes a support plate. The coupling connects the output end of the torque testing machine and the joint. The joint is penetrated through the support plate and is used to connect the screw rod.

5. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 1, characterized in that: The bottom of the sliding seat is provided with a groove, and the base is provided with a guide block which is relatively slidably matched with the groove.

6. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 1, characterized in that: A trigger member is connected to the sliding seat, and a detection unit is also provided on the table top. In response to the sliding seat sliding along the second direction, the detection unit is triggered and sends a position signal of the sliding seat in the second direction to the control system. The control system controls the operation of the propulsion mechanism and the torque testing machine according to the position signal, so that the torque testing machine can be matched with the first one of the multiple spiral rods.

7. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 6, characterized in that: The detection unit is arranged on a side of the fixture facing away from the torque testing machine.

8. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 6, characterized in that: The triggering member is detachably connected to the side of the sliding seat facing away from the torque testing machine.

9. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 6, characterized in that: The detection unit includes a first induction switch and a second induction switch which are arranged at intervals along the second direction.

10. The torque testing device for the supporting device of the injection pump for the microfluidic system according to claim 1, characterized in that: The table top is also provided with a display screen, and the display screen is communicatively connected with the control system.

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