Automatic testing equipment for peptide reagents

Abstract

The present invention relates to the technical field of polypeptide reagent testing, and mainly to an automatic testing device for polypeptide reagents, comprising a support frame, a mounting frame fixed on the support frame, and two card plates fixed on the support frame, a test tube insert plate is placed between the two card plates, and a through hole for inserting the test tube is opened on the test tube insert plate; and a plurality of arc plates installed in the mounting frame, distributed on the outside of the through hole of the test tube insert plate; and a plurality of swing plates rotatably installed in the mounting frame, the plurality of swing plates are installed corresponding to the positions of the arc plates, and a quantitative injection mechanism is fixed on the outer end of the swing plate. The quantitative injection mechanism designed by the present invention can realize quantitative injection of test liquid into the test tube, cooperate with the joint action of a rotating unit and a plurality of quantitative injection mechanisms, so as to realize quantitative dripping of test liquid into a plurality of polypeptide reagents at one time, meet the needs of comparison of multiple groups of experiments, and make the amount of test liquid dripped each time consistent, thereby improving the test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of polypeptide reagent testing, in particular to automatic testing equipment for polypeptide reagents. Background Art

[0002] Peptides are compounds formed by a-amino acids linked together by peptide bonds. They are also intermediate products of protein hydrolysis. Peptides composed of three or more amino acid molecules are called polypeptides. Their molecular weight is less than 10,000Da, they can pass through semipermeable membranes, and are not precipitated by trichloroacetic acid and ammonium sulfate.

[0003] There are many ways to detect polypeptides. Currently, the commonly used methods include Kjeldahl nitrogen determination, colorimetry, and ultraviolet spectrophotometry. Among them, a commonly used method in colorimetry is called the biuret method. In an alkaline solution environment, biuret reacts with divalent copper ions to form a purple-red complex. Since the molecular formula of the peptide bond of the polypeptide contains a -C0-NH- group, the biuret reaction is achieved; the sensitivity of the biuret reaction is relatively low, the sample volume required is large, and some substances may interfere with the test results. In order to ensure the accuracy of the test data, multiple groups of experiments are compared to ensure the accuracy and precision of the experiment. However, when preparing multiple groups of reagents, the process is quite cumbersome. During the experiment, it is easy to get confused, and it is impossible to ensure that the amount of test reagents is consistent each time, which affects the results of the experimental test, and the efficiency of the test will be relatively low. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic testing device for polypeptide reagents to solve the problem that when preparing polypeptide reagents for testing, the quantitative dripping process of the test solution is cumbersome and it is impossible to ensure that the dripping amount is the same each time.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic testing device for polypeptide reagents, comprising a support frame, a mounting frame fixed on the support frame, and two card plates fixed on the support frame, a test tube insert plate is placed between the two card plates, and a through hole for inserting the test tube is opened on the test tube insert plate; and a plurality of arc plates installed in the mounting frame, adjacent arc plates are oriented in opposite directions and are distributed on the outside of the through holes of the test tube insert plate; and a plurality of swing plates rotatably installed in the mounting frame, the plurality of swing plates are installed corresponding to the positions of the arc plates, a quantitative injection mechanism is fixed on the outer end of the swing plate, the bottom of the quantitative injection mechanism is in contact with the outer side of the arc plate, and the test liquid is injected into the test tube through the quantitative injection mechanism, a plurality of rotating units are fixed on the outer side of the mounting frame, and each rotating unit drives two adjacent swing plates to swing synchronously; and two pipelines fixed in the mounting frame, one of which is used for transporting the test liquid and the other is used for transporting the gas.

[0006] Preferably, the quantitative injection mechanism includes a syringe, an outer wall of the syringe is fixed to the swing plate, and the bottom of the syringe is fixedly connected to a liquid outlet pipe, a seal that fits the arc plate is installed in the liquid outlet pipe, an end cover is inserted into the inner thread of the syringe, and two injection ends are installed on the end cover, the two injection ends are connected to two pipelines respectively through a hose, and a pressure regulating component is also installed on the end cover, and the air pressure in the inner syringe is regulated by the pressure regulating component.

[0007] Preferably, the end cover includes an inner plate and a threaded ring threadedly connected to the inner wall of the injection barrel, the inner plate and the threaded ring are rotationally connected, and the two injection ends are installed on the inner plate, and the pressure regulating component is fixed to the inner plate.

[0008] Preferably, the injection end includes an injection tube fixed on the inner plate, a sealing ring is fixed in the injection tube, and a docking plate is fixed in the injection tube through a bracket, an insertion rod is slidably inserted in the docking plate, and a sealing ball is fixed to the outer end of the insertion rod which abuts against the sealing ring, an extrusion spring is sleeved on the outer side of the insertion rod for pushing the sealing ball toward the sealing ring, a hose connected to the pipeline is fixed to the outer end of the injection tube, and pressure is applied in the hose to make the sealing ball move away from the sealing ring.

[0009] Preferably, the sealing member comprises a sealing ring 2 fixed on the inner wall of the liquid outlet pipe, a docking plate 2 is fixed on the inner wall of the liquid outlet pipe via a bracket, an insertion rod 2 is slidably inserted in the docking plate 2, and a sealing ball 2 matched with the sealing ring 2 is fixed at one end of the insertion rod 2, and a fitting ball fitted with the outer wall of the arc plate is fixed at the other end, a tension spring fixed to the sealing ball 2 and the docking plate 2 is sleeved on the outer side of the insertion rod 2, and the sealing ball 2 is fitted with the outer wall of the arc plate by the fitting ball and the outer wall of the arc plate so that the sealing ball 2 and the sealing ring 2 are abutted against each other.

[0010] Preferably, the pressure regulating component includes a ventilation pipe fixedly connected to the inner plate and a regulating tube fixed to the outer wall of the injection barrel, the regulating tube and the ventilation pipe are connected by a hose, a blocking assembly is installed in the regulating pipe, a floating plate is provided in the injection barrel, and a protrusion adapted to the ventilation pipe is fixed on the floating plate.

[0011] Preferably, the blocking assembly includes a sealing ring three fixed in the adjusting tube, a docking plate three is fixed in the adjusting tube by a bracket, and an insertion rod three is slidably inserted in the docking plate three, a sealing ball three is fixed at one end of the insertion rod three and is fitted with the sealing ring three, and a push spring for moving the sealing ball three toward the sealing ring three is sleeved on the outer side of the insertion rod three, a connecting rod is fixed on the sealing ball three, and a universal wheel fitted with the outer wall of the arc plate is fixed on the outer end of the connecting rod, the universal wheel fits with the outer wall of the arc plate so that the sealing ball three does not contact the sealing ring three.

[0012] Preferably, a swivel is fixed to the outer side of the threaded ring, and an anti-slip groove is provided on the swivel.

[0013] Preferably, the rotating unit includes a rotating motor, which is fixed to the outer wall of the mounting frame through a motor frame, and a driving gear is fixed to the output end of the rotating motor, and a rotating shaft that is rotatably connected to the mounting frame is fixed on the two swing plates, and the axial direction of the rotating shaft passes through the center of the adjacent arc plate, and a transmission gear that meshes with the driving gear is fixed on the rotating shaft.

[0014] Preferably, the syringe is made of transparent material.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The quantitative injection mechanism designed in the present invention can realize the quantitative injection of the test liquid into the test tube, and cooperate with the rotating unit and multiple quantitative injection mechanisms to realize the quantitative dripping of the test liquid into most polypeptide reagents at one time, meet the needs of multiple groups of experimental comparisons, and make the amount of the test liquid dripped each time consistent, thereby improving the accuracy of the test.

[0017] 2. After each rotation of the rotating unit of the present invention, one of the syringes can be driven to separate from the arc plate and start dripping liquid. After returning to the arc plate, the dripping liquid is stopped and the test liquid can be replenished, thereby realizing batch and efficient dripping of the test liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the installation frame of the present invention after partial section;

[0020] Figure 3 It is a structural schematic diagram of the present invention from another angle;

[0021] Figure 4 It is a partial cross-sectional rear front view of the installation frame of the present invention;

[0022] Figure 5It is a schematic diagram of the positional relationship between the two quantitative injection mechanisms, the two arc-shaped plates and the test tube of the present invention;

[0023] Figure 6 It is a schematic diagram of the internal structure of the injection barrel of the present invention after partial cross-section;

[0024] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0025] Figure 8 It is a schematic diagram of the structure of the rotating unit of the present invention;

[0026] Fig. 9 It is a schematic diagram of a partial cross-sectional structure of the end cover of the present invention;

[0027] Fig.10 for Fig. 9 Enlarged view of point B in the middle.

[0028] In the figure: 1, support frame; 2, mounting frame; 3, card plate; 4, test tube plug plate; 5, arc plate; 6, swing plate; 7, quantitative injection mechanism; 8, rotating unit; 9, pipeline; 10, injection barrel; 11, liquid outlet pipe; 12, sealing member; 13, end cap; 14, injection end; 15, pressure regulating member; 16, inner plate; 17, threaded ring; 18, injection tube; 19, sealing ring 1; 20, docking plate 1; 21, plug rod 1; 22, sealing ball 1; 23, extrusion Spring; 24. Sealing ring 2; 25. Docking plate 2; 26. Insert rod 2; 27. Fitting ball; 28. Tension spring; 29. ​​Ventilation pipe; 30. Adjustment pipe; 31. Blocking assembly; 32. Floating plate; 33. Sealing ring 3; 34. Docking plate 3; 35. Insert rod 3; 36. Sealing ball 3; 37. Push-open spring; 38. Universal wheel; 39. Sealing ball 2; 40. Swivel; 41. Rotating motor; 42. Driving gear; 43. Rotating shaft; 44. Transmission gear. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1 - Figure 5, an automatic testing device for a polypeptide reagent shown in the figure comprises a support frame 1, a mounting frame 2 is fixed on the support frame 1, and two card plates 3 are fixed on the support frame 1, a test tube insert plate 4 is placed between the two card plates 3, and a through hole for inserting a test tube is opened on the test tube insert plate 4; and a plurality of arc plates 5 installed in the mounting frame 2, adjacent arc plates 5 face opposite directions and are distributed outside the through holes of the test tube insert plate 4; and a plurality of swing plates 6 rotatably installed in the mounting frame 2, and the plurality of swing plates 6 are installed corresponding to the positions of the arc plates 5, and a quantitative injection mechanism 7 is fixed to the outer end of the swing plate 6, and the bottom of the quantitative injection mechanism 7 is in contact with the outer side of the arc plate 5, and the test liquid is injected into the test tube through the quantitative injection mechanism 7, and a plurality of rotating units 8 are fixed on the outer side of the mounting frame 2, and each rotating unit 8 drives two adjacent swing plates 6 to swing synchronously; and two pipelines 9 fixed in the mounting frame 2, one of which is used for transporting the test liquid, and the other is used for transporting the gas;

[0031] In this solution, the test liquid is transported to the quantitative injection mechanism 7 through the pipeline 9, and then the quantitative injection mechanism 7 is driven to separate from the arc plate 5 through the rotating unit 8, and the test tube in the test tube insert plate 4 is dripped. The multiple quantitative injection mechanisms 7 are operated synchronously to achieve batch dripping of equal amounts, meet the needs of multiple groups of experimental comparisons, and make the amount of test liquid dripped each time consistent, thereby improving the accuracy of the test.

[0032] It should also be noted that one of the pipelines 9 for conveying the test liquid is connected to the liquid supply device for conveying the test liquid, and the other pipeline 9 for conveying gas is connected to the gas supply device for conveying gas to meet the discharge of the liquid in the quantitative injection mechanism 7.

[0033] For further information, see Figure 5 , Figure 6 , Fig. 9 and Fig.10 The quantitative injection mechanism 7 includes a syringe 10, the outer wall of the syringe 10 is fixed to the swing plate 6, the bottom of the syringe 10 is fixedly connected with a liquid outlet pipe 11, and a sealing member 12 that fits the arc plate 5 is installed in the liquid outlet pipe 11. The syringe 10 has an end cover 13 inserted into the inner thread, and two injection ends 14 are installed on the end cover 13. The two injection ends 14 are connected to the two pipelines 9 through a hose, and a pressure regulating component 15 is also installed on the end cover 13. The pressure regulating component 15 is used to adjust the air pressure in the inner syringe 10;

[0034] Among them, see Fig. 9 The end cover 13 includes an inner plate 16 and a threaded ring 17 threadedly connected to the inner wall of the injection barrel 10. The inner plate 16 and the threaded ring 17 are rotatably connected. The two injection ends 14 are installed on the inner plate 16, and the pressure regulating component 15 is fixed to the inner plate 16.

[0035] In this solution, the end cover 13 adopts a matching design of the inner plate 16 and the threaded ring 17 to achieve movement in the syringe 10, so that the injection volume can be controlled.

[0036] Also, see Fig.10 The injection end 14 includes an injection tube 18 fixed on the inner plate 16, a sealing ring 19 is fixed in the injection tube 18, a docking plate 20 is fixed in the injection tube 18 through a bracket, a plug rod 21 is slidably inserted in the docking plate 20, a sealing ball 22 that abuts against the sealing ring 19 is fixed at the outer end of the plug rod 21, an extrusion spring 23 that pushes the sealing ball 22 toward the sealing ring 19 is sleeved on the outer side of the plug rod 21, a hose connected to the pipeline 9 is fixed at the outer end of the injection tube 18, and the sealing ball 22 is kept away from the sealing ring 19 by applying pressure in the hose.

[0037] It should be noted that: liquid is transmitted through the pipeline 9, thereby squeezing the sealing ball 22, causing the sealing ball 22 to move downward and detach from the sealing ring 19, and allowing the liquid to pass through the injection tube 18 and enter the injection barrel 10. When injecting liquid, the other injection end 14, due to the increased pressure in the injection barrel 10, causes the sealing ball 22 to always be against the sealing ring 19. Similarly, when injecting gas, one of the injection ends 14 is inducted, and the other injection end 14 is in a closed state.

[0038] For further information, see Figure 7 The sealing member 12 includes a sealing ring 24 fixed on the inner wall of the liquid outlet pipe 11, a docking plate 25 is fixed on the inner wall of the liquid outlet pipe 11 through a bracket, a plug rod 26 is slidably inserted in the docking plate 25, a sealing ball 39 adapted to the sealing ring 24 is fixed at one end of the plug rod 26, and a fitting ball 27 fitted to the outer wall of the arc plate 5 is fixed at the other end, and a tension spring 28 fixed to the sealing ball 39 and the docking plate 25 is sleeved on the outer side of the plug rod 26, and the sealing ball 39 is fitted to the outer wall of the arc plate 5 through the fitting ball 27, so that the sealing ball 39 and the sealing ring 24 are abutted;

[0039] It should be noted that when the fitting ball 27 in the sealing member 12 fits with the outer wall of the arc plate 5, the fitting ball 27 will squeeze the insert rod 26, so that the sealing ball 39 fits with the sealing ring 24 to maintain a sealed state, thereby preventing liquid from dripping from the liquid outlet tube 11 during injection. When the fitting ball 27 separates from the arc plate 5, the sealing ball 39 will be pulled apart from the sealing ring 24 by the tension spring 28. At this time, the injected gas in the syringe 10 increases the air pressure, thereby causing the test liquid in the syringe 10 to drip out from the liquid outlet tube 11.

[0040] For further information, see Figure 8The rotating unit 8 includes a rotating motor 41, which is fixed to the outer wall of the mounting frame 2 through a motor frame. A driving gear 42 is fixed to the output end of the rotating motor 41. A rotating shaft 43 that is rotatably connected to the mounting frame 2 is fixed to the two swing plates 6. The axial direction of the rotating shaft 43 passes through the center of the adjacent arc plate 5. A transmission gear 44 that meshes with the driving gear 42 is fixed to the rotating shaft 43.

[0041] The principle of the rotation unit 8 driving the two swing plates 6 to rotate is as follows: the driving gear 42 rotates through the operation of the rotating motor 41, and then cooperates with the transmission gear 44 to make the two adjacent swing plates 6 rotate accordingly, so that one of the syringes 10 is separated from the arc plate 5, and under the action of the injection gas in the pipeline 9, it starts to drip liquid, and then swings back to its original position after the dripping is completed.

[0042] Example 2: Please refer to Figure 6 and Figure 7 This embodiment further explains the first embodiment, and the difference lies in that a specific implementation structure of the voltage regulating component 15 is disclosed.

[0043] For more details, see Figure 5 and Figure 6 The pressure regulating component 15 includes a vent pipe 29 fixedly connected to the inner plate 16 and a regulating pipe 30 fixed to the outer wall of the injection barrel 10. The regulating pipe 30 and the vent pipe 29 are connected through a hose. A blocking component 31 is installed in the regulating pipe 30. A floating plate 32 is provided in the injection barrel 10, and a protrusion adapted to the vent pipe 29 is fixed on the floating plate 32.

[0044] Among them, the blocking component 31 includes a sealing ring 33 fixed in the adjusting tube 30, a docking plate 34 is fixed in the adjusting tube 30 through a bracket, a plug rod 35 is slidably inserted in the docking plate 34, a sealing ball 36 that fits with the sealing ring 33 is fixed at one end of the plug rod 35, a push spring 37 for moving the sealing ball 36 toward the sealing ring 33 is sleeved on the outer side of the plug rod 35, a connecting rod is fixed on the sealing ball 36, and a universal wheel 38 that fits with the outer wall of the arc plate 5 is fixed on the outer end of the connecting rod, the universal wheel 38 fits with the outer wall of the arc plate 5, so that the sealing ball 36 does not contact with the sealing ring 33.

[0045] The principle of the pressure regulating component 15 to regulate the pressure inside the syringe 10 is: when injecting the test liquid, the syringe 10 is located at the arc plate 5, the universal wheel 38 and the fitting ball 27 are in contact with the arc plate 5, and the pipeline 9 is injected with the test liquid. Under the action of pressure, the sealing ball 22 is pushed open, and the liquid is injected into the syringe 10. The liquid in the syringe 10 is slowly filled, and the original gas in the bottle enters the regulating tube 30 through the vent pipe 29. Because the universal wheel 38 is in contact with the arc plate 5, the sealing ball 36 and the sealing ring 33 are in a disengaged state, so the gas is easily discharged, thereby realizing the regulation of the air pressure in the syringe 10 during liquid injection. At the same time, when discharging, the universal wheel 38 is disengaged from the arc plate 5. At this time, under the action of the push spring 37, the sealing ball 36 and the sealing ring 33 are abutted, so that no gas is discharged, and a sealed state is achieved, which does not affect normal liquid discharge.

[0046] It should also be noted that during the injection process, the liquid level gradually rises, which will drive the floating plate 32 to rise, and during the rising process, the protrusion on the floating plate 32 is against the bottom of the ventilation pipe 29 on the inner plate 16, so that the ventilation pipe 29 cannot be ventilated, thereby completing the injection, making the amount of liquid injected each time uniform, and the liquid will not be discharged through the ventilation pipe 29 and the regulating pipe 30.

[0047] Example 3: Please refer to Figure 6 and Figure 8 This embodiment further illustrates other embodiments, and the difference lies in that the structure of the threaded ring 17 is optimized to facilitate rotation.

[0048] Specifically, a swivel 40 is fixed to the outside of the threaded ring 17 , and an anti-slip groove is provided on the swivel 40 . Meanwhile, in order to facilitate personnel to observe the syringe 10 , the syringe 10 is made of a transparent material, and scale lines are engraved on its outer wall.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic testing device for a polypeptide reagent, comprising: A support frame (1), wherein a mounting frame (2) is fixed on the support frame (1); It is characterized by further comprising: Two clamping plates (3) fixed on the support frame (1), a test tube inserting plate (4) being placed between the two clamping plates (3), and a through hole for inserting a test tube being opened on the test tube inserting plate (4); and, A plurality of arc-shaped plates (5) installed in the installation frame (2), wherein adjacent arc-shaped plates (5) face in opposite directions and are distributed outside the through holes of the test tube insert plate (4); and A plurality of swing plates (6) are rotatably mounted in the mounting frame (2), the plurality of swing plates (6) being mounted corresponding to the positions of the arc-shaped plates (5), a quantitative injection mechanism (7) being fixed to the outer end of the swing plate (6), the bottom of the quantitative injection mechanism (7) being in contact with the outer side of the arc-shaped plates (5), and the test liquid is injected into the test tube through the quantitative injection mechanism (7), a plurality of rotating units (8) being fixed to the outer side of the mounting frame (2), each rotating unit (8) driving two adjacent swing plates (6) to swing synchronously; and, Two pipelines (9) are fixed in the mounting frame (2), one of which is used for transporting a test liquid and the other is used for transporting a gas; the quantitative injection mechanism (7) comprises a syringe (10), the outer wall of which is fixed to the swing plate (6), and the bottom of the syringe (10) is fixedly connected to a liquid outlet pipe (11), a sealing member (12) which fits the arc plate (5) is installed in the liquid outlet pipe (11), an end cover (13) is inserted into the internal thread of the syringe (10), and two injection ends (14) are installed on the end cover (13), and the two injection ends (14) are respectively connected to the two pipelines (9) through a hose , a pressure regulating component (15) is also installed on the end cover (13), and the pressure regulating component (15) is used to adjust the air pressure in the injection cylinder (10); the rotating unit (8) includes a rotating motor (41), the rotating motor (41) is fixed to the outer wall of the installation frame (2) through a motor frame, and a driving gear (42) is fixed to the output end of the rotating motor (41), and a rotating shaft (43) that is rotatably connected to the installation frame (2) is fixed on the two swing plates (6), and the axial direction of the rotating shaft (43) passes through the center of the adjacent arc-shaped plates (5), and a transmission gear (44) that meshes with the driving gear (42) is fixed on the rotating shaft (43).

2. The automatic testing device for a polypeptide reagent according to claim 1, characterized in that: The end cover (13) comprises an inner plate (16) and a threaded ring (17) threadably connected to the inner wall of the injection barrel (10); the inner plate (16) and the threaded ring (17) are rotatably connected to each other, and the two injection ends (14) are mounted on the inner plate (16), and the pressure regulating component (15) is fixed to the inner plate (16).

3. The automatic testing device for a polypeptide reagent according to claim 2, characterized in that: The injection end (14) comprises an injection tube (18) fixed on the inner plate (16), a sealing ring (19) being fixed inside the injection tube (18), and a docking plate (20) being fixed inside the injection tube (18) via a bracket, an insertion rod (21) being slidably inserted inside the docking plate (20), and a sealing ball (22) abutting against the sealing ring (19) being fixed at the outer end of the insertion rod (21), an extrusion spring (23) for pushing the sealing ball (22) toward the sealing ring (19) being sleeved on the outer side of the insertion rod (21), and a hose connected to the pipeline (9) being fixed at the outer end of the injection tube (18), and the sealing ball (22) being moved away from the sealing ring (19) by applying pressure inside the hose.

4. The automatic testing device for a polypeptide reagent according to claim 1, characterized in that: The sealing member (12) comprises a sealing ring (24) fixed on the inner wall of the liquid outlet pipe (11), a docking plate (25) fixed on the inner wall of the liquid outlet pipe (11) via a bracket, a plug rod (26) slidably inserted in the docking plate (25), and a sealing ball (39) matched with the sealing ring (24) is fixed at one end of the plug rod (26), and a fitting ball (27) fitted with the outer wall of the arc plate (5) is fixed at the other end, and a tension spring (28) fixed with the sealing ball (39) and the docking plate (25) is sleeved on the outer side of the plug rod (26), and the sealing ball (39) and the sealing ring (24) are abutted against each other by the fitting ball (27) fitting with the outer wall of the arc plate (5).

5. The automatic testing device for a polypeptide reagent according to claim 1, characterized in that: The pressure regulating component (15) comprises a vent pipe (29) fixedly connected to the inner plate (16) and a regulating pipe (30) fixed to the outer wall of the injection barrel (10); the regulating pipe (30) and the vent pipe (29) are connected via a hose; a blocking component (31) is installed in the regulating pipe (30); a floating plate (32) is provided in the injection barrel (10), and a protrusion matched with the vent pipe (29) is fixed on the floating plate (32).

6. The automatic testing device for a polypeptide reagent according to claim 5, characterized in that: The plugging assembly (31) comprises a sealing ring (33) fixed in the regulating tube (30), a docking plate (34) fixed in the regulating tube (30) via a bracket, and a plug rod (35) slidably inserted in the docking plate (34), a sealing ball (36) fitted with the sealing ring (33) fixed at one end of the plug rod (35), and a push spring (37) for moving the sealing ball (36) toward the sealing ring (33) is sleeved on the outer side of the plug rod (35), a connecting rod is fixed on the sealing ball (36), and a universal wheel (38) fitted with the outer wall of the arc plate (5) is fixed on the outer end of the connecting rod, and the universal wheel (38) fits with the outer wall of the arc plate (5) so that the sealing ball (36) does not contact the sealing ring (33).

7. The automatic testing device for a polypeptide reagent according to claim 2, characterized in that: A rotating ring (40) is fixed on the outer side of the threaded ring (17), and an anti-slip groove is provided on the rotating ring (40).

8. The automatic testing device for a polypeptide reagent according to claim 1, characterized in that: The injection cylinder (10) is made of a transparent material.

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