阅读说明：本技术 一种可自动更换枪头的加样枪 (Sample adding gun capable of automatically replacing gun head ) 是由 易婉婉 吕中伟 范恒伟 于 2021-01-22 设计创作，主要内容包括：本发明公开了一种可自动更换枪头的加样枪,包括加样枪主体和枪头,所述加样枪主体与连接管的一端固定连接,所述连接管的另一端固定连接有第一套筒的一端,所述第一套筒的下方设置有枪头,所述连接管的外部设置有转环,所述连接管与转环转动连接,所述连接管的内部设置有排风扇和吸风扇,所述连接管的内部两侧位置均固定连接有固定支架,本发明设置有半圆卡环,两个半圆卡环将使用结束的枪头通过第二电动推杆向外推出,新的枪头通过第二隔板在第二弹簧的挤压下向下推出,便于操作人员继续进行试验,避免操作人员手动更换枪头导致加样枪枪头损坏,有利于提高加样枪吸取液体的精确度,从而有利于提高实验结果精确度。(The invention discloses a sample adding gun capable of automatically replacing a gun head, which comprises a sample adding gun main body and a gun head, wherein the sample adding gun main body is fixedly connected with one end of a connecting pipe, the other end of the connecting pipe is fixedly connected with one end of a first sleeve, the gun head is arranged below the first sleeve, a rotating ring is arranged outside the connecting pipe, the connecting pipe is rotatably connected with the rotating ring, an exhaust fan and an air suction fan are arranged inside the connecting pipe, and fixed supports are fixedly connected to two sides inside the connecting pipe respectively. Thereby being beneficial to improving the accuracy of the experimental result.)

1. The utility model provides a can change application of sample rifle of rifle head automatically, includes application of sample rifle main part (1) and rifle head (5), its characterized in that: the sample adding gun comprises a sample adding gun body (1) and a connecting pipe (2), wherein the other end of the connecting pipe (2) is fixedly connected with one end of a first sleeve (4), a gun head (5) is arranged below the first sleeve (4), a rotating ring (3) is arranged outside the connecting pipe (2), the connecting pipe (2) is rotatably connected with the rotating ring (3), an exhaust fan (16) and an exhaust fan (17) are arranged inside the connecting pipe (2), fixing supports (15) are fixedly connected to the two sides of the connecting pipe (2), the exhaust fan (16) and the exhaust fan (17) are fixedly connected with the fixing supports (15) on the two sides respectively, the exhaust fan (16) and the exhaust fan (17) are respectively located on the two sides of the connecting pipe (2), and a first fixing block (11) is fixedly connected to the top surface inside of the connecting pipe (2), the bottom surface of the first fixed block (11) is fixedly connected with a second fixed block (12), the bottom end of the second fixed block (12) is fixedly connected with one end of a push rod (13), the other end of the push rod (13) penetrates through the top surface of a second sleeve (20) and is fixedly connected with a third fixed block (22), a piston (23) is fixedly connected below the third fixed block (22), the piston (23) is in sliding connection with the second sleeve (20), a first spring (14) is wound outside the push rod (13), the first spring (14) is positioned between the second fixed block (12) and the second sleeve (20), heating elements (19) are arranged on two sides of the second sleeve (20), the heating elements (19) are fixedly connected with the first sleeve (4), one side of the connecting pipe (2) is fixedly connected with a distilled water pipe opening (10), distilled water mouth of pipe (10) and the one end fixed connection of distilled water pipe (18), the other end and sealing washer (21) fixed connection of distilled water pipe (18), the one end of distilled water pipe (18) runs through second sleeve (20) and sealing washer (21), the inside below position fixedly connected with stock solution chamber (30) of second sleeve (20), third through-hole (31) have been seted up on stock solution chamber (30), the inside fixedly connected with temperature sensor (33) of stock solution chamber (30), the first baffle of bottom surface fixedly connected with (34) of second sleeve (20), first baffle (34) top central point position fixedly connected with liquid outlet (35), liquid outlet (35) and pipette (36) fixed connection, pipette (36) are located the inside of rifle head (5).

2. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: the upper end of the gun head (5) is fixedly connected with a soft rubber ring (46), the soft rubber ring (46) is positioned below the first partition plate (34), a second partition plate (45) is arranged above the soft rubber ring (46), both ends of the second partition plate (45) are fixedly connected with limiting rings (44), a second spring (43) is fixedly connected between the limiting rings (44) and the bottom end of the second sleeve (20), both ends of the first partition plate (34) are provided with second springs (43), one end of the liquid suction pipe (36) penetrates through the central position of the second partition plate (45), both ends of the bottom surface of the second sleeve (20) are fixedly connected with a fourth fixing block (37) and a second electric push rod (38), the second electric push rod (38) is positioned on one side of the fourth fixing block (37), one end of the second electric push rod (38) is fixedly connected with a connecting column (39), the connecting column (39) is fixedly connected with a fifth fixing block (40), a semicircular clamping ring (41) is fixedly connected to one end of the fifth fixing block (40), the semicircular clamping ring (41) is located on two sides of the gun head (5) respectively, and a rubber pad is arranged on one side of the semicircular clamping ring (41).

3. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: piston (23) inside upper end both sides all are provided with first water inlet (24), two the bottom and the second water inlet (25) intercommunication of first water inlet (24), the both sides of second water inlet (25) all are provided with connecting block (26), the first electric putter (27) of inside fixedly connected with of connecting block (26), the one end fixedly connected with water-stop sheet (29) of first electric putter (27), one side of connecting block (26) is seted up flutedly (28), recess (28) agree with water-stop sheet (29), be provided with the rubber pad on water-stop sheet (29).

4. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: the diameter of the bottom end of the gun head (5) is smaller than that of the pipette (36).

5. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: the bottom surface fixedly connected with stopper (42) of connecting pipe (2), stopper (42) are located the below of soft rubber ring (46).

6. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: a plurality of first through-holes (8) have been seted up to the both sides of change (3), a plurality of second through-holes (9) have been seted up on connecting pipe (2), one side of exhaust fan (16) and suction fan (17) all is provided with second through-hole (9), first through-hole (8) are the same with the diameter of second through-hole (9).

7. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: and a sealing ring (21) is fixedly connected inside the second sleeve (20).

8. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: the distilled water pipe (18) is provided with an electromagnetic valve (32), and the electromagnetic valve (32) is positioned on one side of the lower part of the interior of the connecting pipe (2).

9. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: be provided with temperature display screen (6) and control panel (7) on application of sample rifle main part (1), temperature display screen (6) are located the top of control panel (7).

10. A sample adding gun with an automatically replaceable gun head according to claim 1, wherein: the third through hole (31) and the second water inlet (25) are both square, and the third through hole (31) is matched with the second water inlet (25).

Technical Field

The invention belongs to the technical field of medical equipment, and particularly relates to a sample adding gun with a gun head capable of being automatically replaced.

Background

The sample adding gun, namely a pipettor, also known as a pipette gun, is an appliance for quantitatively transferring liquid, when conducting research in the aspect of analysis and test, a small amount or trace amount of liquid is generally transferred by using the pipettor, the pipettor can be divided into a gas piston type pipettor and an external piston type pipettor according to the principle, the gas piston type pipettor is mainly used for standard pipetting, the external piston type pipettor is mainly used for treating special liquids which are volatile, easy to corrode and thicken, and the like, when an operator conducts pipetting, the gun head of the sample adding gun needs to be manually replaced, time and labor are wasted, manual operation easily causes damage to the gun head of the sample adding gun, so that the experimental precision is easily influenced, even the experimental result is influenced, and before conducting pipetting, the operator needs to detect the temperatures of the liquid and the gun head of the sample adding gun, the experimental result precision is easily influenced by the difference of the temperatures, need unpack whole application of sample rifle apart, inside washing the application of sample rifle with distilled water, assemble again after the dismantlement, the in-process causes the damage to the application of sample rifle easily to lead to the life of application of sample rifle to shorten.

Disclosure of Invention

The invention aims to overcome the existing defects and provide a sample adding gun capable of automatically replacing a gun head, so as to solve the problems that when an operator performs liquid transfer, the gun head of the sample adding gun needs to be manually replaced, time and labor are wasted, the gun head of the sample adding gun is easy to damage due to manual operation, the experimental precision is easy to influence, and even the experimental result is influenced, and before the operator performs liquid transfer, the temperature of liquid and the temperature of the sample adding gun head need to be detected, the precision of the experimental result is easy to influence due to different temperatures, after the sample adding gun sucks the liquid with high corrosivity or high volatility, the whole sample adding gun needs to be disassembled, the interior of the sample adding gun is washed by distilled water, the sample adding gun is assembled after being disassembled, the sample adding gun is easy to damage in the process, and the service life of the sample adding gun is shortened.

In order to achieve the purpose, the invention provides the following technical scheme: a sample adding gun capable of automatically replacing a gun head comprises a sample adding gun main body and a gun head, wherein the sample adding gun main body is fixedly connected with one end of a connecting pipe, the other end of the connecting pipe is fixedly connected with one end of a first sleeve, the gun head is arranged below the first sleeve, a rotating ring is arranged outside the connecting pipe, the connecting pipe is rotatably connected with the rotating ring, an exhaust fan and an exhaust fan are arranged inside the connecting pipe, fixing supports are fixedly connected with the two sides of the inside of the connecting pipe respectively, the exhaust fan and the exhaust fan are fixedly connected with the fixing supports at the two sides respectively, the exhaust fan and the exhaust fan are respectively positioned at the two sides of the inside of the connecting pipe, a first fixing block is fixedly connected with the top surface of the inside of the connecting pipe, a second fixing block is fixedly connected with the bottom surface of the first fixing block, and one end, the other end of the push rod penetrates through the top surface of the second sleeve and is fixedly connected with a third fixed block, a piston is fixedly connected below the third fixed block, the piston and the second sleeve are in sliding connection, a first spring is wound outside the push rod and is positioned between the second fixed block and the second sleeve, heating elements are arranged on two sides of the second sleeve and are fixedly connected with the first sleeve, a distilled water pipe opening is fixedly connected to one side of the connecting pipe and is fixedly connected with one end of the distilled water pipe, the other end of the distilled water pipe is fixedly connected with a sealing ring, one end of the distilled water pipe penetrates through the second sleeve and the sealing ring, a liquid storage cavity is fixedly connected to the position below the inside of the second sleeve, a third through hole is formed in the liquid storage cavity, and a temperature sensor is fixedly connected inside the liquid storage cavity, the telescopic bottom surface fixedly connected with first baffle of second, first baffle top central point puts fixedly connected with liquid outlet, liquid outlet and pipette fixed connection, the pipette is located the inside of rifle head.

Preferably, the upper end of the gun head is fixedly connected with a soft rubber ring, the soft rubber ring is positioned below the first partition plate, a second partition plate is arranged above the soft rubber ring, both ends of the second partition plate are fixedly connected with limit rings, a second spring is fixedly connected between the limit rings and the bottom end of the second sleeve, the second spring is arranged below both ends of the first partition plate, one end of the pipette penetrates through the central position of the second partition plate, both ends of the bottom surface of the second sleeve are fixedly connected with a fourth fixed block and a second electric push rod, the second electric push rod is positioned at one side of the fourth fixed block, one end of the second electric push rod is fixedly connected with a connecting column, the connecting column is fixedly connected with a fifth fixed block, one end of the fifth fixed block is fixedly connected with a semicircular clamping ring, and the semicircular clamping rings are respectively positioned at both sides of the gun head, one side of the semicircular clamping ring is provided with a rubber pad.

Preferably, both sides of the upper end inside the piston are provided with a first water inlet and a second water inlet, the bottom end of the first water inlet is communicated with the second water inlet, the two sides of the second water inlet are provided with connecting blocks, a first electric push rod is fixedly connected inside the connecting blocks, a water-stop sheet is fixedly connected to one end of the first electric push rod, one side of each connecting block is provided with a groove, each groove is matched with the water-stop sheet, and a rubber pad is arranged on the water-stop sheet.

Preferably, the diameter of the bottom end of the lance tip is smaller than the diameter of the bottom end of the pipette.

Preferably, the bottom surface fixedly connected with stopper of connecting pipe, the stopper is located the below of soft rubber ring.

Preferably, a plurality of first through holes are formed in two sides of the rotating ring, a plurality of second through holes are formed in the connecting pipe, second through holes are formed in one sides of the exhaust fan and the suction fan, and the diameters of the first through holes and the second through holes are the same.

Preferably, a sealing ring is fixedly connected inside the second sleeve.

Preferably, the distilled water pipe is provided with an electromagnetic valve, and the electromagnetic valve is positioned at one side of the lower part in the connecting pipe.

Preferably, be provided with temperature display screen and control panel in the application of sample rifle main part, temperature display screen is located control panel's top.

Preferably, the third through hole and the second water inlet are both square, and the third through hole is matched with the second water inlet.

Compared with the prior art, the invention provides a sample adding gun with an automatically replaceable gun head, which has the following beneficial effects:

1. according to the invention, the semicircular clamping rings are arranged, the used gun heads are pushed out through the second electric push rod by the two semicircular clamping rings, and the new gun heads are pushed out downwards under the extrusion of the second spring through the second partition plate, so that the test is continued by an operator, the damage of the gun heads of the sample adding guns caused by the manual replacement of the gun heads by the operator is avoided, the accuracy of the liquid absorption of the sample adding guns is improved, and the accuracy of the test result is improved.

2. According to the invention, the temperature sensor is arranged at the bottom end in the liquid storage cavity, so that the temperature of the absorbed liquid can be conveniently measured, the temperature display screen is arranged on the sample adding gun main body, so that an operator can conveniently observe the liquid temperature and the internal temperature of the sample adding gun, the influence on the accuracy of the absorbed liquid due to temperature difference during operation of the operator is prevented, and the accuracy of an experimental result is favorably improved.

3. According to the invention, the distilled water pipe opening is formed in one side of the connecting pipe, the distilled water pipe opening is connected with the distilled water pipe, the distilled water pipe is positioned in the connecting pipe, the other end of the distilled water pipe is communicated with the interior of the second sleeve, so that an operator can conveniently inject distilled water into the second sleeve from the distilled water pipe opening after an experiment, and the second sleeve and the liquid storage cavity are cleaned through the first water inlet, the second water inlet and the third through hole, so that the operation is simple, the sample adding gun is prevented from being detached and cleaned by the operator, the damage to the sample adding gun is prevented, and the service life of the sample adding gun is prolonged.

4. According to the invention, the electric heating element is arranged in the first sleeve, so that an operator can clean the interior of the sample adding gun by using distilled water and then dry the interior of the sample adding gun, and the situation that part of highly corrosive liquid is attached to the surfaces of the push rod and the piston for a long time to cause the push rod and the piston to be corroded is prevented, and the service life of the sample adding gun is prolonged.

5. According to the invention, the suction fan and the exhaust fan are arranged in the connecting pipe, and the through holes are formed in one sides of the suction fan and the exhaust fan, so that the ventilation of the interior of the sample adding gun is facilitated, the air drying speed of the interior of the sample adding gun is accelerated, and the damage of the sample adding gun is prevented.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of a connecting tube and a sleeve according to the present invention;

fig. 3 is a schematic perspective view of a lance head according to the present invention;

FIG. 4 is an enlarged schematic view of the structure A proposed by the present invention;

FIG. 5 is an enlarged schematic view of the structure B proposed by the present invention;

FIG. 6 is an enlarged schematic view of the structure C proposed by the present invention;

FIG. 7 is an enlarged view of the structure D proposed by the present invention;

FIG. 8 is an enlarged schematic view of the structure E proposed by the present invention;

FIG. 9 is an enlarged schematic view of the proposed F structure;

in the figure: 1. a sample adding gun main body; 2. a connecting pipe; 3. rotating the ring; 4. a first sleeve; 5. a gun head; 6. a temperature display screen; 7. a control panel; 8. a first through hole; 9. a second through hole; 10. a distilled water pipe port; 11. a first fixed block; 12. a second fixed block; 13. a push rod; 14. a first spring; 15. fixing a bracket; 16. an exhaust fan; 17. an air suction fan; 18. a distilled water pipe; 19. a heating element; 20. a second sleeve; 21. a seal ring; 22. a third fixed block; 23. a piston; 24. a first water inlet; 25. a second water inlet; 26. connecting blocks; 27. a first electric push rod; 28. a groove; 29. a water-stop sheet; 30. a liquid storage cavity; 31. a third through hole; 32. an electromagnetic valve; 33. a temperature sensor; 34. a first separator; 35. a liquid outlet; 36. a pipette; 37. a fourth fixed block; 38. a second electric push rod; 39. connecting columns; 40. a fifth fixed block; 41. a semicircular snap ring; 42. a limiting block; 43. a second spring; 44. a limiting ring; 45. a second separator; 46. a soft rubber ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a sample adding gun capable of automatically replacing a gun head comprises a sample adding gun main body 1 and a gun head 5, wherein the sample adding gun main body 1 is fixedly connected with one end of a connecting pipe 2, the other end of the connecting pipe 2 is fixedly connected with one end of a first sleeve 4, the gun head 5 is arranged below the first sleeve 4, a rotating ring 3 is arranged outside the connecting pipe 2, the connecting pipe 2 is rotatably connected with the rotating ring 3, an exhaust fan 16 and an air suction fan 17 are arranged inside the connecting pipe 2, so that ventilation inside the sample adding gun is facilitated, the air drying speed inside the sample adding gun is accelerated, the damage of the sample adding gun is facilitated to be prevented, fixing supports 15 are fixedly connected with the positions of two inner sides of the connecting pipe 2 respectively, the exhaust fan 16 and the air suction fan 17 are fixedly connected with the fixing supports 15 at two sides respectively, the exhaust fan 16 and the air suction fan 17 are respectively positioned at two inner sides, the bottom surface of the first fixed block 11 is fixedly connected with a second fixed block 12, the bottom end of the second fixed block 12 is fixedly connected with one end of a push rod 13, the other end of the push rod 13 penetrates through the top surface of a second sleeve 20 and is fixedly connected with a third fixed block 22, a piston 23 is fixedly connected below the third fixed block 22, the piston 23 is in sliding connection with the second sleeve 20, a first spring 14 is wound outside the push rod 13, the first spring 14 is positioned between the second fixed block 12 and the second sleeve 20, both sides of the second sleeve 20 are respectively provided with a heating element 19, the heating element 19 is fixedly connected with a first sleeve 4, one side of a connecting pipe 2 is fixedly connected with a distilled water nozzle 10, the distilled water nozzle 10 is fixedly connected with one end of a distilled water pipe 18, the other end of the distilled water pipe 18 is fixedly connected with a sealing ring 21, one end of the distilled water pipe 18 penetrates through the second sleeve 20 and the sealing ring 21, a liquid storage cavity 30 is fixedly connected at the, third through hole 31 has been seted up on stock solution chamber 30, the inside fixedly connected with temperature sensor 33 in stock solution chamber 30, the operating personnel of being convenient for observe liquid temperature and the inside temperature of application of sample rifle, when preventing the operating personnel operation, because the accuracy that the temperature difference leads to absorbing liquid receives the influence, be favorable to improving the accuracy of experimental result, the first baffle 34 of bottom surface fixedly connected with of second sleeve 20, first baffle 34 top central point puts fixedly connected with liquid outlet 35, liquid outlet 35 and pipette 36 fixed connection, pipette 36 is located the inside of rifle head 5.

In the invention, preferably, the upper end of the gun head 5 is fixedly connected with a soft rubber ring 46, the soft rubber ring 46 is positioned below the first partition plate 34, a second partition plate 45 is arranged above the soft rubber ring 46, both ends of the second partition plate 45 are fixedly connected with limit rings 44, a second spring 43 is fixedly connected between the limit rings 44 and the bottom end of the second sleeve 20, the second springs 43 are arranged below both ends of the first partition plate 34, one end of the pipette 36 penetrates through the central position of the second partition plate 45, both ends of the bottom surface of the second sleeve 20 are fixedly connected with a fourth fixed block 37 and a second electric push rod 38, the second electric push rod 38 is positioned at one side of the fourth fixed block 37, one end of the second electric push rod 38 is fixedly connected with a connecting column 39, the connecting column 39 is fixedly connected with a fifth fixed block 40, one end of the fifth fixed block 40 is fixedly connected with a semicircular snap ring 41, the semicircular snap rings 41 are respectively positioned at both sides, one side of the semicircular snap ring 41 is provided with a rubber pad.

In the invention, preferably, the two sides of the upper end inside the piston 23 are both provided with the first water inlets 24, the bottom ends of the two first water inlets 24 are communicated with the second water inlet 25, so that the second sleeve 20 and the liquid storage cavity 30 can be conveniently cleaned, the operation is simple, the situation that an operator takes the sample adding gun apart for cleaning is avoided, and the sample adding gun is prevented from being damaged, so that the service life of the sample adding gun is prolonged, the two sides of the second water inlet 25 are both provided with the connecting blocks 26, the inside of the connecting blocks 26 is fixedly connected with the first electric push rod 27, one end of the first electric push rod 27 is fixedly connected with the water-stop plate 29, one side of the connecting blocks 26 is provided with the groove 28, the groove 28 is.

In the present invention, it is preferable that the diameter of the bottom end of the lance tip 5 is smaller than the diameter of the bottom end of the pipette tube 36.

In the present invention, preferably, the bottom surface of the connecting tube 2 is fixedly connected with a limiting block 42, and the limiting block 42 is located below the soft rubber ring 46.

In the invention, preferably, a plurality of first through holes 8 are formed in two sides of the rotating ring 3, a plurality of second through holes 9 are formed in the connecting pipe 2, the second through holes 9 are formed in one sides of the exhaust fan 16 and the suction fan 17, and the diameters of the first through holes 8 and the second through holes 9 are the same.

In the present invention, it is preferable that the second sleeve 20 has a sealing ring 21 fixedly connected therein.

In the present invention, it is preferable that the distilled water pipe 18 is provided with the electromagnetic valve 32, and the electromagnetic valve 32 is located at a lower side position inside the connection pipe 2.

In the invention, preferably, the sample adding gun main body 1 is provided with the temperature display screen 6 and the control panel 7, so that an operator can observe the liquid temperature and the internal temperature of the sample adding gun conveniently, and the temperature display screen 6 is positioned above the control panel 7.

In the present invention, preferably, the third through hole 31 and the second water inlet 25 are both square, and the third through hole 31 is matched with the second water inlet 25.

The working principle and the using process of the invention are as follows: when the device is used, an operator controls the connecting column 39 and the fifth fixing block 40 to drive the semicircular clamping ring 41 to move downwards through the control panel 7, so that the used gun head 5 is pushed downwards, a new gun head 5 is pushed downwards under the extrusion of the second spring 43 through the second partition plate 45, the damage to the gun head 5 caused by the manual replacement of the gun head 5 by the operator is avoided, the accuracy of liquid suction of the sample adding gun is improved, the accuracy of an experimental result is improved, after the operator sucks the highly corrosive liquid, the operator controls the water baffle 29 to be matched with the groove 28 through the control panel 7, one end of the distilled water pipe port 10 is connected with the distilled water outlet, the distilled water flows into the second sleeve 20 through the distilled water pipe 18, flows into the liquid storage cavity 30 through the first water inlet 24, the second water inlet 25 and the third through hole 31 on the piston 23 and passes through the liquid outlet 35 and the liquid outlet 36, the gun head 5 is used for cleaning the interior of the sample adding gun, the operation is simple, the sample adding gun is prevented from being disassembled and cleaned by an operator, the damage to the sample adding gun is prevented, the service life of the sample adding gun is prolonged, after the cleaning is finished, the operator rotates the rotary ring 3 to align the first through hole 8 on the rotary ring 3 with the second through hole 9 on the connecting pipe 2, the heating element 19 is controlled by the control panel 7 to heat the interior of the first sleeve 4, the operator can conveniently clean the interior of the sample adding gun by using distilled water and then dry the interior of the sample adding gun, the exhaust fan 16 and the suction fan 17 are opened, the ventilation in the interior of the sample adding gun is facilitated, the air drying speed in the interior of the sample adding gun is accelerated, the damage of the sample adding gun is prevented, after the drying is finished, the new gun head is replaced again, the first electric push rod 27 is controlled by the control panel 7 to drive the water baffle 29, the rotating ring 3 is rotated to make the first through hole 8 on the rotating ring 3 and the second through hole 9 on the connecting pipe 2 staggered.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.