Calibrating device for medical manual aspirator

Abstract

The invention provides a medical manual aspirator calibration device, which belongs to the technical field of pressure measurement, and comprises a detection support mechanism and a clamping position control mechanism, the detection supporting mechanism comprises a box body, a connector clamping assembly and an air pressure sensor I; the clamping position control mechanism comprises a needle cylinder clamping assembly and a piston position control assembly. The piston is pushed and pulled by the piston position control assembly at different speeds for multiple times, so that the air pressure in the box body changes correspondingly, whether the negative pressure generated in the needle cylinder is qualified or not after the piston is pulled at different speeds is judged, and the calibration work of the medical manual aspirator can be accurately completed; the technical problems that an existing negative pressure suction calibration mode is based on subjective judgment of workers, and detection data are not accurate are effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure measurement, and specifically discloses a calibration device for a medical manual aspirator. Background Art

[0002] Medical aspirators are used to suck out liquid such as phlegm in the human body, bleeding during surgery, exudates, pus, and contents in thoracic organs, so as to clearly observe the human body structure during the treatment process and reduce the chance of contamination.

[0003] A manual aspirator, such as a manual negative pressure aspirator structure disclosed in a Chinese patent with publication number CN211157559U. When in use, it is necessary to calibrate the medical manual aspirator. The staff will operate the manual aspirator to make the negative pressure suction generated by the manual aspirator act on the body, and then judge whether the negative pressure generated by the manual aspirator is normal according to experience. The above calibration method is based on the subjective judgment of the staff, and the detection data is not accurate, which is prone to medical accidents. Summary of the Invention

[0004] The present invention provides a calibration device for a medical manual aspirator to solve the technical problem that the existing negative pressure suction calibration method is based on the subjective judgment of the staff and the detection data is not accurate.

[0005] The above-mentioned calibration device for a medical manual aspirator includes a detection support mechanism and a clamping and positioning mechanism; the detection support mechanism includes a box body, a connector clamping assembly and a pressure sensor I; the clamping and positioning mechanism includes a syringe clamping assembly and a piston positioning assembly; the syringe clamping assembly is used to clamp and fix the syringe of the medical manual aspirator; the piston positioning assembly is used to fix the piston of the medical manual aspirator and push the piston to move relative to the syringe; an air hole I is provided on the box body, and the air hole I is used to connect with the connector of the medical manual aspirator; the connector clamping assembly includes a gas guide ring, an elastic expansion ring, a gas guide block, a on-off valve I, a gas guide pipe I, a three-way valve, a vacuum pump, a gas guide pipe II and a on-off valve II; the gas guide ring is fixed outside the box body and surrounds the exhaust hole I; the elastic expansion ring is fixed on the inner wall of the gas guide ring and is communicated with the gas guide ring; the gas guide block is fixed on the outer wall of the gas guide ring and is communicated with the gas guide ring; the on-off valve I is fixed on the gas guide block; the three-way valve and the vacuum pump are fixed outside the box body; the three-way valve is provided with an air inlet, a normally open exhaust port and a normally closed exhaust port, the air inlet is communicated with the exhaust port of the vacuum pump, and the normally closed exhaust port is communicated with the gas guide block through the gas guide pipe I; the gas guide pipe II passes through the box body, and the end portion located inside the box body is fixed with a on-off valve II, and the end portion located outside the box body is connected with the air inlet of the vacuum pump; the pressure sensor I is used to detect the air pressure inside the box body.

[0006] In the above-mentioned calibration device for a medical manual aspirator, an air hole II is further provided on the box body, and a on-off valve III is installed on the air hole II; a pressure sensor II is also fixed on the gas guide block.

[0007] In the above-mentioned calibration device for medical manual suction devices, the syringe clamping assembly includes a clamping seat I, a clamping seat II, a connecting beam, and a telescopic cylinder III; the clamping seat I is fixed, and an arc-shaped groove I is provided on the upper surface of the clamping seat I; the clamping seat II is located above the clamping seat I, and an arc-shaped groove II is provided on the lower surface of the clamping seat II; the connecting beam vertically passes through the clamping seat I and is connected to the clamping seat II at the top; the telescopic cylinder III drives the connecting beam to move vertically up and down relative to the clamping seat I.

[0008] In the above-mentioned calibration device for medical manual suction devices, the syringe clamping assembly further includes a positioning plate, a displacement sensor, and a pressure sensor; the positioning plate is perpendicularly connected to the connecting beam; the displacement sensor is fixed on the clamping seat I and is used to detect the distance between the clamping seat I and the positioning plate; the pressure sensor is used to detect the pressure of the telescopic cylinder III.

[0009] In the above-mentioned calibration device for medical manual suction devices, the piston positioning and control assembly includes a moving frame II, a telescopic cylinder IV, a limiting rod, a limiting plate I, a plugging rod, a limiting plate II, a threaded rod, and a nut seat; the moving frame II and the clamping seat I are connected by the telescopic cylinder IV; two limiting rods are vertically fixed on the moving frame II, and a plugging rod is vertically inserted through each limiting rod; the limiting plate I is connected to the first ends of the two limiting rods; the limiting plate II is connected to the second ends of the two limiting rods; the nut seat is fixed on the moving frame II; the threaded rod passes through the nut seat, and the first end of the threaded rod is rotatably connected to the limiting plate II.

[0010] In the above-mentioned calibration device for medical manual suction devices, the piston positioning and control assembly further includes a telescopic rod II; the fixed ends of the telescopic cylinder IV and the telescopic rod II are both connected to the clamping seat I, and the telescopic ends are both connected to the moving frame II; a handwheel is installed at the second end of the threaded rod.

[0011] In the above-mentioned calibration device for medical manual suction devices, the detection and support mechanism further includes a workbench; the clamping seat I is fixed on the workbench, and the box body and the piston positioning and control assembly are located on both sides of the clamping seat I.

[0012] In the above-mentioned calibration device for medical manual suction devices, a limiting groove is provided on the workbench; the limiting groove and the piston positioning and control assembly are located on both sides of the clamping seat I; the detection and support mechanism further includes a position control assembly; the position control assembly includes a telescopic cylinder I, a moving frame I, a telescopic rod I, and a telescopic cylinder II; the moving frame I is slidably connected to the limiting groove; the two ends of the telescopic cylinder I are respectively connected to the workbench and the moving frame I; the box body is located above the moving frame I, and the box body and the moving frame I are connected by the telescopic rod I and the telescopic cylinder II.

[0013] In the above-mentioned calibration device for medical manual suction devices, the number of connecting beams is two; both of the two connecting beams vertically pass through the clamping seat I and the workbench and are connected at the bottom by a connecting plate; the two ends of the telescopic cylinder III are respectively connected to the workbench and the connecting plate; the two ends of the positioning plate are respectively connected to the two connecting beams; an installation groove is provided on the clamping seat I, and the pressure sensor is fixed in the installation groove.

[0014] The above-mentioned medical manual suction calibrating device further includes a controller; the controller is fixed on the workbench, and a display screen and an operation panel are arranged on the controller; the on-off valve I, the air pressure sensor II, the three-way valve, the vacuum pump, the on-off valve II, the air pressure sensor I, the on-off valve III, the telescopic cylinder III, the displacement sensor, the pressure sensor, the telescopic cylinder IV, and the telescopic cylinder I and the telescopic cylinder II are all connected to the controller; the workbench is supported by a plurality of support legs.

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

[0016] When using the above device, first fix the syringe through the syringe clamping assembly, fix the piston through the piston position control assembly, insert the connector into the air hole I, start the vacuum pump, open the normally closed exhaust port of the on-off valve II and the three-way valve, close the on-off valve I, the vacuum pump extracts the gas inside the box body, and conveys it to the inside of the air guide ring through the three-way valve, the air guide pipe I and the air guide block, so that the elastic expansion ring is inflated and expanded, and the elastic expansion ring expands and wraps around the outside of the connector, so that the space between the connector and the elastic expansion ring is sealed; then close the normally closed exhaust port of the three-way valve, open the normally open exhaust port, and after the air pressure sensor I detects that the air pressure in the box body reaches the preset value, the vacuum pump stops, and the on-off valve II is closed; finally, push and pull the piston multiple times at different speeds through the piston position control assembly, so that the air pressure inside the box body changes accordingly, and judge whether the negative pressure generated in the syringe is qualified after the piston is pulled at different speeds, then the calibration work of the medical manual suction can be accurately completed, effectively improving the technical problem that the existing negative pressure suction calibration method is subject to the subjective judgment of the staff and the detection data is inaccurate. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural schematic diagram of the medical manual suction calibrating device; Figure 2 It is Figure 1 the enlarged view of part A in <{ Figure 3 It is an assembly drawing of the box body and the connector clamping assembly; Figure 4 It is an assembly drawing of the air guide ring, the elastic expansion ring and the air guide block; Figure 5 It is an internal schematic diagram of the box body; Figure 6 It is an assembly drawing of the clamping and positioning mechanism and the workbench; Figure 7 It is a structural schematic diagram of the clamping and positioning mechanism; Figure 8 It is an assembly drawing of the clamping seat II and the connecting beam; Figure 9 It is an assembly drawing of the piston positioning assembly and the clamping seat I; Figure 10 It is an assembly drawing of the limit plate I, the insertion rod, the limit plate II, and the threaded rod; Figure 11 It is a clamping schematic diagram of the operating handle.

[0019] Reference numerals in the figure: 11, workbench; 12, support leg; 13, box body; 14, limit groove; 15, telescopic cylinder I; 16, moving frame I; 17, telescopic rod I; 18, telescopic cylinder II; 19, air hole I; 110, air guide ring; 111, elastic expansion ring; 112, air guide block; 113, on-off valve I; 114, air pressure sensor II; 115, air guide pipe I; 116, three-way valve; 117, vacuum pump; 118, air guide pipe II; 119, on-off valve II; 120, air pressure sensor I; 121, on-off valve III; 21, clamping seat I; 22, arc groove I; 23, moving frame II; 24, telescopic rod II; 25, telescopic cylinder IV; 26, limit rod; 27, limit plate I; 28, insertion rod; 29, limit plate II; 210, threaded rod; 211, nut seat; 212, handwheel; 213, clamping seat II; 214, arc groove II; 215, connecting beam; 216, positioning plate; 217, connecting plate; 218, telescopic cylinder III; 219, displacement sensor; 220, pressure sensor; 221, installation groove; 3, controller; 41, syringe; 42, connector; 43, waste liquid collection pipe; 44, plugging member; 45, grip; 46, piston; 47, operating handle. Specific embodiments

[0020] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention provides a medical manual aspirator calibration device for calibrating a medical manual aspirator. The medical manual aspirator includes a syringe 41 and a piston 46; a connector 42 is provided at the center of the first end of the syringe 41, and the connector 42 is used to connect a medical suction tube, a liquid suction tube or a blood drain tube. A waste liquid collection tube 43 is provided on the outside of the connector 42, and the waste liquid collection tube 43 is used to connect to a waste liquid collection container; the first end of the piston 46 is movably inserted into the syringe 41, and the second end is provided with an operating handle 47; the operating handle 47 provides a fulcrum for the user to control the piston 46, so that the piston 46 moves inside the syringe 41 to generate negative pressure suction; a grip 45 is provided on the outside of the syringe 41, and the grip 45 provides a gripping position for the user to conveniently control the medical manual aspirator.

[0022] Example 1 The medical manual aspirator calibration device provided in this embodiment includes a detection support mechanism and a clamping and positioning control mechanism; the detection support mechanism includes a box body 13, a connector clamping assembly and an air pressure sensor I120; the clamping and positioning control mechanism includes a syringe clamping assembly and a piston positioning control assembly; the syringe clamping assembly is used to clamp and fix the syringe 41 of the medical manual aspirator; the piston positioning control assembly is used to fix the piston 46 of the medical manual aspirator and push the piston 46 to move relative to the syringe 41; an air hole I19 is provided on the box body 13, and the air hole I19 is used to connect with the connector 42 of the medical manual aspirator; the connector clamping assembly includes an air guide ring 110, an elastic expansion ring 111, an air guide block 112, an on-off valve I113, an air guide tube I115, a three-way valve 116, a vacuum pump 117, an air guide tube II118 and an on-off valve II119; the air guide ring 1 10 is fixed outside the box body 13 and surrounds the exhaust hole I19; the elastic expansion ring 111 is fixed on the inner wall of the air guide ring 110 and is connected to the air guide ring 110; the air guide block 112 is fixed on the outer wall of the air guide ring 110 and is connected to the air guide ring 110; the on-off valve I113 is fixed on the air guide block 112; the three-way valve 116 and the vacuum pump 117 are fixed outside the box body 13; the three-way valve 116 is provided with an air inlet, a normally open exhaust port and a normally closed exhaust port, the air inlet is connected to the exhaust port of the vacuum pump 117, and the normally closed exhaust port is connected to the air guide block 112 through the air guide pipe I115; the air guide pipe II118 passes through the box body 13, and the end located inside the box body 13 is fixed with the on-off valve II119, and the end located outside the box body 13 is connected to the air inlet of the vacuum pump 117; the air pressure sensor I120 is used to detect the air pressure inside the box body 13.

[0023] The calibration process of the medical manual aspirator provided in this embodiment is as follows: S1, install a sealing member 44 on the outside of the waste liquid collection tube 43 to seal the waste liquid collection tube 43, ensuring that the medical manual aspirator can only communicate with the outside world through the connector 42, and the first end of the piston 46 presses the syringe 41; S2. Fix the syringe 41 with the syringe clamping assembly, fix the piston 46 with the piston position control assembly, insert the connector 42 into the air hole Ⅰ19, start the vacuum pump 117, open the normally closed exhaust port of the on-off valve Ⅱ119 and the three-way valve 116, close the on-off valve Ⅰ113. The vacuum pump 117 extracts the gas inside the box body 13 and transports it to the inside of the air guide ring 110 through the three-way valve 116, the air guide pipe Ⅰ115 and the air guide block 112, so that the elastic expansion ring 111 is inflated. The elastic expansion ring 111 expands and wraps around the outside of the connector 42, so that the space between the connector 42 and the elastic expansion ring 111 is sealed. As the working time of the vacuum pump 117 increases, the air pressure inside the elastic expansion ring 111 increases, and the sealing performance between the connector 42 and the elastic expansion ring 111 increases until the sealing requirement is met. Then close the normally closed exhaust port of the three-way valve 116 and open the normally open exhaust port. The gas discharged from the vacuum pump 117 to the three-way valve 116 is discharged through the normally open exhaust port of the three-way valve 116; S3. When the sealing between the connector 42 and the elastic expansion ring 111 meets the sealing requirement, the box body 13 is in a sealed state. The vacuum pump 117 continues to work to reduce the air pressure inside the box body 13. After the air pressure sensor Ⅰ120 detects that the air pressure inside the box body 13 reaches the preset value P1, the vacuum pump 117 stops and the on-off valve Ⅱ119 is closed; S4. Pull the piston 46 outward at a speed V with the piston position control assembly, so that a negative pressure is generated inside the syringe 41, and the air pressure inside the box body 13 decreases accordingly. Record the value P2 of the air pressure sensor Ⅰ120. Push the piston 46 inward with the piston position control assembly until the piston 46 returns to its original position, and the air pressure inside the box body 13 returns to the preset value. Calculate whether the difference between P1 and P2 meets the specified value in the instruction manual attached to the medical manual aspirator to complete one calibration.

[0024] Push and pull the piston 46 multiple times at different speeds to cause corresponding changes in the air pressure inside the box body 13. Determine whether the negative pressure generated inside the syringe 41 is qualified after the piston 46 is pulled at different speeds, and the calibration work of the medical manual aspirator can be accurately completed. The elastic expansion ring 111 can meet the sealing requirements of connectors 42 with various diameters. Vacuumizing the box body 13 can also clean its interior to prevent impurities from entering the inside of the syringe 41 during the detection process.

[0025] When the detection of the medical manual aspirator is completed, open the on-off valve Ⅰ113, the gas inside the air guide ring 110 and the elastic expansion ring 111 is discharged, the elastic expansion ring 111 contracts, the connector 42 is separated from the air hole Ⅰ19, and the box body 13 is connected to the outside through the air hole Ⅰ19, and the air pressure inside the box body 13 is restored.

[0026] An air hole Ⅱ is also provided on the box body 13, and a on-off valve Ⅲ 121 is installed on the air hole Ⅱ. By controlling the opening of the on-off valve Ⅲ 121, the inside of the box body 13 can be communicated with the outside through the air hole Ⅱ, reducing the deformation of the elastic expansion ring 111.

[0027] A pressure sensor Ⅱ 114 is also fixed on the air guide block 112, which is used to detect the air pressure inside the air guide block 112, and judge whether the seal between the elastic expansion ring 111 and the connector 42 meets the requirements according to the detected value of the pressure sensor Ⅱ 114.

[0028] Embodiment 2 On the basis of Embodiment 1, the following improvements are made in this embodiment.

[0029] The syringe clamping assembly includes a clamping seat Ⅰ 21, a clamping seat Ⅱ 213, a connecting beam 215 and a telescopic cylinder Ⅲ 218; the clamping seat Ⅰ 21 is fixed, and an arc groove Ⅰ 22 is provided on the upper surface of the clamping seat Ⅰ 21; the clamping seat Ⅱ 213 is located above the clamping seat Ⅰ 21, and an arc groove Ⅱ 214 is provided on the lower surface of the clamping seat Ⅱ 213; the connecting beam 215 vertically passes through the clamping seat Ⅰ 21, and the top end is connected to the clamping seat Ⅱ 213; the telescopic cylinder Ⅲ 218 drives the connecting beam 215 to move up and down perpendicular to the clamping seat Ⅰ 21, so that the distance between the clamping seat Ⅱ 213 and the clamping seat Ⅰ 21 can be changed, realizing the clamping and fixing of syringes 41 with different outer diameters. The arc groove can fit the outer side of the circular syringe 41, making the clamping firm.

[0030] The syringe clamping assembly further includes a positioning plate 216, a displacement sensor 219 and a pressure sensor 220; the positioning plate 216 is vertically connected to the connecting beam 215; the displacement sensor 219 is fixed on the clamping seat Ⅰ 21 and is used to detect the distance between the clamping seat Ⅰ 21 and the positioning plate 216; the pressure sensor 220 is used to detect the pressure of the telescopic cylinder Ⅲ 218. The diameter of the syringe 41 clamped and fixed by the cooperation of the clamping seat Ⅱ 213 and the clamping seat Ⅰ 21 can be calculated according to the detection result of the displacement sensor 219. When the clamping seat Ⅱ 213 moves down to fit the syringe 41, the downward movement of the clamping seat Ⅱ 213 is restricted, the extension of the telescopic cylinder Ⅲ 218 is restricted, the internal pressure of the telescopic cylinder Ⅲ 218 increases, and the pressure sensor 220 detects the change of the internal pressure of the telescopic cylinder Ⅲ 218. After reaching the preset value, the telescopic cylinder Ⅲ 218 stops working, and the pressure on the syringe 41 can be accurately controlled, avoiding deformation of the syringe 41 due to excessive force and reducing the possibility of damage and scrapping of the medical manual aspirator during the calibration process.

[0031] The piston position control assembly includes a moving frame II 23, a telescopic rod II 24, a telescopic cylinder IV 25, a limiting rod 26, a limiting plate I 27, a plugging rod 28, a limiting plate II 29, a threaded rod 210 and a nut seat 211; the fixed ends of the telescopic cylinder IV 25 and the telescopic rod II 24 are both connected to the clamping seat I 21, and the telescopic ends are both connected to the moving frame II 23; two limiting rods 26 are vertically fixed on the moving frame II 23, and a plugging rod 28 is vertically penetrated through each limiting rod 26; the limiting plate I 27 is connected to the first ends of the two limiting rods 26; the limiting plate II 29 is connected to the second ends of the two limiting rods 26; the nut seat 211 is fixed on the moving frame II 23; the threaded rod 210 passes through the nut seat 211, the first end of the threaded rod 210 is rotatably connected to the limiting plate II 29, and a handwheel 212 is installed at the second end of the threaded rod 210.

[0032] When placing the medical manual suction device, adjust the operating handle 47 between the limiting rod 26 and the limiting plate II 29, rotate the handwheel 212, push the limiting plate II 29 to move forward, finally the limiting plate II 29 abuts against the operating handle 47, and the limiting plate II 29 and the limiting rod 26 cooperate to clamp and fix the operating handle 47. Stop rotating the handwheel 212 so that the position of the operating handle 47 can be controlled by the piston position control assembly. The telescopic cylinder IV 25 can be telescoped to push the piston 46 to move relative to the syringe barrel 41.

[0033] The detection and support mechanism further includes a workbench 11; the workbench 11 is supported by a plurality of support legs 12; the clamping seat I 21 is fixed on the workbench 11, and the box body 13 and the piston position control assembly are located on both sides of the clamping seat I 21.

[0034] A limiting groove 14 is formed on the workbench 11; the limiting groove 14 and the piston position control assembly are located on both sides of the clamping seat I 21; the detection and support mechanism further includes a position control assembly; the position control assembly includes a telescopic cylinder I 15, a moving frame I 16, a telescopic rod I 17 and a telescopic cylinder II 18; the moving frame I 16 is slidably connected to the limiting groove 14; the two ends of the telescopic cylinder I 15 are respectively connected to the workbench 11 and the moving frame I 16; the box body 13 is located above the moving frame I 16, and the box body 13 and the moving frame I 16 are connected by the telescopic rod I 17 and the telescopic cylinder II 18.

[0035] After determining the diameter of the syringe barrel 41 according to the detection result of the displacement sensor 219, control the box body 13 to move up and down through the telescopic cylinder II 18. After the central axis of the air hole I 19 is aligned with the central axis of the syringe barrel 41, control the telescopic cylinder I 15 to contract so that the air hole I 19 is sleeved outside the connector 42.

[0036] There are two connecting beams 215; both of the two connecting beams 215 vertically pass through the clamping seat I 21 and the workbench 11, and the bottom ends are connected by a connecting plate 217; both ends of the telescopic cylinder III 218 are respectively connected to the workbench 11 and the connecting plate 217; both ends of the positioning plate 216 are respectively connected to the two connecting beams 215; an installation groove 221 is formed on the clamping seat I 21, and the pressure sensor 220 is fixed in the installation groove 221.

[0037] The medical manual suction calibrating device provided in this embodiment further includes a controller 3, the controller 3 is fixed on the workbench 11, and a display screen and an operation panel are arranged on the controller 3; the on-off valve I 113, the air pressure sensor II 114, the three-way valve 116, the vacuum pump 117, the on-off valve II 119, the air pressure sensor I 120, the on-off valve III 121, the telescopic cylinder III 218, the displacement sensor 219, the pressure sensor 220, the telescopic cylinder IV 25, the telescopic cylinder I 15, and the telescopic cylinder II 18 are all connected to the controller 3.

[0038] In this embodiment, the telescopic cylinder I 15, the telescopic cylinder II 18, and the telescopic cylinder IV 25 are all air cylinders, the telescopic cylinder III 218 is a hydraulic cylinder, and the on-off valve I 113, the three-way valve 116, the on-off valve II 119, and the on-off valve III 121 are all solenoid valves.

[0039] The calibration process of the medical manual suction provided in this embodiment is as follows: S1. Install a sealing member 44 on the outer side of the waste liquid collection pipe 43 to seal the waste liquid collection pipe 43, ensure that the medical manual suction can only communicate with the outside through the connector 42, and the first end of the piston 46 presses against the syringe barrel 41. S2. Place the medical manual suction in the arc groove I 22, adjust the operating handle 47 between the limit rod 26 and the limit plate II 29, and the piston position control assembly fixes the operating handle 47. S3. The controller 3 controls the telescopic cylinder III 218 to contract, the arc groove II 214 fits with the syringe barrel 41, the pressure sensor 220 detects the hydraulic change inside the telescopic cylinder III 218, the displacement sensor 219 detects the distance between the clamping seat I 21 and the positioning plate 216, and the detection values of the pressure sensor 220 and the displacement sensor 219 are both fed back to the controller 3. After the detection value of the pressure sensor 220 reaches the preset value, the controller 3 controls the telescopic cylinder III 218 to stop working, and calculates the diameter of the syringe barrel 41 through the detection value of the displacement sensor 219. S4. According to the diameter of the syringe barrel 41, the controller 3 controls the telescopic cylinder II 18 to align the central axis of the air hole I 19 with the central axis of the syringe barrel 41, and then controls the telescopic cylinder I 15 to sleeved the air hole I 19 outside the connector 42. In S5, the controller 3 controls the start of the vacuum pump 117, opens the normally closed exhaust port of the on-off valve II 119 and the three-way valve 116, closes the on-off valve I 113. The air pressure sensor II 114 detects the internal air pressure of the air guide block 112 and feeds the detected value back to the controller 3. After reaching the preset value, the controller 3 closes the normally closed exhaust port of the three-way valve 116, opens the normally open exhaust port, and the vacuum pump 117 continues to operate. After the air pressure sensor I 120 detects that the air pressure in the box body 13 reaches the preset value P1, the vacuum pump 117 stops and the on-off valve II 119 is closed; In S6, the piston 46 is pulled outwards at a speed V through the piston position control assembly, so that a negative pressure is generated inside the syringe 41, and the air pressure inside the box body 13 decreases accordingly. The value P2 of the air pressure sensor I 120 is recorded. The piston 46 is pushed inwards through the piston position control assembly until the piston 46 returns to its original position, and the air pressure inside the box body 13 returns to the preset value. It is calculated whether the difference between P1 and P2 conforms to the specified value in the instruction manual attached to the medical manual aspirator, and one calibration is completed.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A calibration device for a medical manual suction device, characterized in that, It includes a detection support mechanism and a clamping and positioning mechanism; The detection support mechanism includes a box body (13), a connector clamping assembly, and a pressure sensor I (120); The clamping and positioning mechanism includes a syringe clamping assembly and a piston positioning assembly; The syringe clamping assembly is used to clamp and fix the syringe (41) of a medical manual aspirator; The piston positioning assembly is used to fix the piston (46) of the medical manual aspirator and push the piston (46) to move relative to the syringe (41); An air hole I (19) is provided on the box body (13), and the air hole I (19) is used to connect with the connector (42) of the medical manual aspirator; The connector clamping assembly includes an air guide ring (110), an elastic expansion ring (111), an air guide block (112), a on-off valve I (113), an air guide pipe I (115), a three-way valve (116), a vacuum pump (117), an air guide pipe II (118), and a on-off valve II (119); The air guide ring (110) is fixed outside the box body (13) and surrounds the exhaust hole I (19); The elastic expansion ring (111) is fixed on the inner wall of the air guide ring (110) and is communicated with the air guide ring (110); The air guide block (112) is fixed on the outer wall of the air guide ring (110) and is communicated with the air guide ring (110); The on-off valve I (113) is fixed on the air guide block (112); The three-way valve (116) and the vacuum pump (117) are fixed outside the box body (13); The three-way valve (116) is provided with an air inlet, a normally open exhaust port, and a normally closed exhaust port. The air inlet is communicated with the exhaust port of the vacuum pump (117), and the normally closed exhaust port is communicated with the air guide block (112) through the air guide pipe I (115); The air guide pipe II (118) passes through the box body (13), and the end portion located inside the box body (13) is fixed with a on-off valve II (119), and the end portion located outside the box body (13) is connected to the air inlet of the vacuum pump (117); The pressure sensor I (120) is used to detect the air pressure inside the box body (13).

2. The medical manual suction calibrating device according to claim 1, wherein An air hole II is further provided on the box body (13), and a on-off valve III (121) is installed on the air hole II; A pressure sensor II (114) is further fixed on the air guide block (112).

3. The medical manual suction calibrating device according to claim 1, wherein The syringe clamping assembly includes a clamping seat I (21), a clamping seat II (213), a connecting beam (215), and a telescopic cylinder III (218); The clamping seat I (21) is fixed, and an arc-shaped groove I (22) is provided on the upper surface of the clamping seat I (21); The clamping seat II (213) is located above the clamping seat I (21), and an arc-shaped groove II (214) is provided on the lower surface of the clamping seat II (213); The connecting beam (215) vertically passes through the clamping seat I (21), and the top end is connected to the clamping seat II (213); The telescopic cylinder III (218) drives the connecting beam (215) to move up and down perpendicular to the clamping seat I (21).

4. The medical manual suction calibrating device according to claim 3, wherein The syringe clamping assembly further includes a positioning plate (216), a displacement sensor (219), and a pressure sensor (220); The positioning plate (216) is vertically connected to the connecting beam (215); The displacement sensor (219) is fixed on the clamping seat I (21) and is used to detect the distance between the clamping seat I (21) and the positioning plate (216); The pressure sensor (220) is used to detect the pressure of the telescopic cylinder III (218).

5. The medical manual suction calibrator according to claim 3 or 4, characterized in that, The piston position control assembly includes a moving frame II (23), a telescopic cylinder IV (25), a limiting rod (26), a limiting plate I (27), a plugging rod (28), a limiting plate II (29), a threaded rod (210) and a nut seat (211); The moving frame II (23) and the clamping seat I (21) are connected by a telescopic cylinder IV (25); Two limiting rods (26) are vertically fixed on the moving frame II (23), and a plugging rod (28) is vertically penetrated through each limiting rod (26); The limiting plate I (27) is connected to the first ends of the two limiting rods (26); The limiting plate II (29) is connected to the second ends of the two limiting rods (26); The nut seat (211) is fixed on the moving frame II (23); The threaded rod (210) passes through the nut seat (211), and the first end of the threaded rod (210) is rotatably connected to the limiting plate II (29).

6. The medical manual suction calibrator according to claim 5, wherein, The piston position control assembly further includes a telescopic rod II (24); The fixed ends of the telescopic cylinder IV (25) and the telescopic rod II (24) are both connected to the clamping seat I (21), and the telescopic ends are both connected to the moving frame II (23); A handwheel (212) is installed at the second end of the threaded rod (210).

7. The medical manual suction calibrating device according to claim 6, wherein The detection and support mechanism further includes a workbench (11); The clamping seat I (21) is fixed on the workbench (11), and the box body (13) and the piston position control assembly are located on both sides of the clamping seat I (21).

8. The calibration device for a medical manual suction device according to claim 7, wherein A limiting groove (14) is formed on the workbench (11); The limiting groove (14) and the piston position control assembly are located on both sides of the clamping seat I (21); The detection and support mechanism further includes a position control assembly; The position control assembly includes a telescopic cylinder I (15), a moving frame I (16), a telescopic rod I (17) and a telescopic cylinder II (18); The moving frame I (16) is slidably connected to the limiting groove (14); The two ends of the telescopic cylinder I (15) are respectively connected to the workbench (11) and the moving frame I (16); The box body (13) is located above the moving frame I (16), and the box body (13) and the moving frame I (16) are connected by a telescopic rod I (17) and a telescopic cylinder II (18).

9. The medical manual suction calibrating device according to claim 8, characterized in that, The number of the connecting beams (215) is two; The two connecting beams (215) both vertically penetrate through the clamping seat I (21) and the workbench (11), and the bottom ends are connected by a connecting plate (217); The two ends of the telescopic cylinder III (218) are respectively connected to the workbench (11) and the connecting plate (217); The two ends of the positioning plate (216) are respectively connected to the two connecting beams (215); An installation groove (221) is formed on the clamping seat I (21), and the pressure sensor (220) is fixed in the installation groove (221).

10. The medical manual suction calibrating device according to claim 9, wherein, It further includes a controller (3); The controller (3) is fixed on the workbench (11), and a display screen and an operation panel are arranged on the controller (3); The on-off valve I (113), the air pressure sensor II (114), the three-way valve (116), the vacuum pump (117), the on-off valve II (119), the air pressure sensor I (120), the on-off valve III (121), the telescopic cylinder III (218), the displacement sensor (219), the pressure sensor (220), the telescopic cylinder IV (25), the telescopic cylinder I (15), and the telescopic cylinder II (18) are all connected to the controller (3); The workbench (11) is supported by a plurality of support legs (12).

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