阅读说明：本技术 一种定量加血型的加样枪 (Sample adding gun for quantitatively adding blood types ) 是由 黄伟文 冯志文 覃美艳 戴应忠 孙一帆 韦孟娟 苏邱莹 于 2020-06-04 设计创作，主要内容包括：本发明提供一种定量加血型的加样枪,包括枪体,枪体的一端为用于与吸嘴连接的吸嘴固定口,另一端为按压端,枪体中空,其上部内侧壁设置有第一卡槽组和若干第二卡槽组；枪体上设置有活塞杆和活塞,活塞杆连接活塞,活塞与枪体内壁滑动及转动连接；活塞杆上连接有连接杆,连接杆远离活塞杆的一端开设有放置槽,放置槽内放置有压缩弹簧,压缩弹簧的弹力方向为枪体的径向,压缩弹簧远离放置槽槽底的一端连接卡杆,卡杆滑动连接放置槽,其背离压缩弹簧的一端在压缩弹簧的作用下伸出放置槽外,该另一端的端部为半球体结构。本发明可实现连续定量加样及不同量的转换,转换方便,耗时少,便于操作。(The invention provides a quantitative blood-adding type sample adding gun, which comprises a gun body, wherein one end of the gun body is a suction nozzle fixing port used for being connected with a suction nozzle, the other end of the gun body is a pressing end, the gun body is hollow, and the inner side wall of the upper part of the gun body is provided with a first card slot group and a plurality of second card slot groups; the gun body is provided with a piston rod and a piston, the piston rod is connected with the piston, and the piston is connected with the inner wall of the gun body in a sliding and rotating manner; be connected with the connecting rod on the piston rod, the connecting rod is kept away from the one end of piston rod and has been seted up the standing groove, has placed compression spring in the standing groove, and compression spring's elasticity direction is the radial of the rifle body, and compression spring keeps away from the one end connection kelly of standing groove tank bottom, and kelly sliding connection standing groove, its one end that deviates from compression spring stretches out the standing groove under compression spring's effect outside, and the tip of this other end is the hemisphere structure. The invention can realize continuous quantitative sample adding and conversion of different quantities, and has the advantages of convenient conversion, less time consumption and convenient operation.)

1. The utility model provides a ration adds sample rifle of blood group, includes the rifle body, the one end of the rifle body is for being used for the fixed mouth of suction nozzle be connected with the suction nozzle, and the other end is for pressing the end, its characterized in that: the gun body is hollow, and a first clamping groove group and a plurality of second clamping groove groups are arranged on the inner side wall of the upper part of the gun body; the first clamping groove group comprises a plurality of first clamping grooves which are arranged at intervals, all the first clamping grooves are sequentially arranged along the length direction of the gun body, and the distance between every two adjacent first clamping grooves is equal; each group of second clamping groove groups comprises at least two second clamping grooves, all the second clamping grooves in the same group are sequentially arranged at intervals along the length direction of the gun body, and the distance between every two adjacent second clamping grooves is equal but not equal to the distance between every two adjacent first clamping grooves; all the second clamping groove groups and the first clamping groove groups are arranged around the periphery of the gun body at intervals in sequence, the vertical distance between the second clamping grooves close to the pressing ends on the two adjacent groups of second clamping groove groups is equal to the distance between the two adjacent first clamping grooves, the second clamping grooves close to the pressing ends on the second clamping groove groups adjacent to the first clamping groove groups and the first clamping grooves close to the pressing ends of the first clamping groove groups are positioned on the same plane, each second clamping groove close to the pressing ends on each second clamping groove group is provided with one first clamping groove which is correspondingly positioned on the same plane, and the second clamping grooves close to the pressing ends on any two groups of second clamping groove groups are not positioned on the same plane;

the gun body is provided with a piston rod and a piston, the piston rod is arranged along the length direction of the gun body, one end of the piston rod is positioned outside the gun body, the other end of the piston rod is slidably arranged in the gun body through the pressing end of the gun body in a penetrating way and is connected with the piston, and the piston is slidably and rotatably connected with the inner wall of the gun body; the piston rod is connected with a connecting rod, the connecting rod is close to the pressing end relative to the piston and is vertical to the piston rod, a placing groove is arranged at one end of the connecting rod, which is far away from the piston rod, a compression spring is placed in the placing groove, the elastic direction of the compression spring is the radial direction of the gun body, one end of the compression spring, which is far away from the bottom of the placing groove, is connected with a clamping rod, the clamping rod is connected with the placing groove in a sliding way, one end of the spring, which is far away from the compression spring, extends out of the placing groove under the action of the compression spring, the end part of the other end of the spring is of a hemispheroid structure, the other end of the clamping rod is embedded into the next first clamping groove from the first clamping groove or embedded into the next second clamping groove from the second clamping groove along with the sliding of the piston relative to the length direction of the gun body, the piston is embedded into a second clamping groove which is positioned at the same height as the first clamping groove from the first clamping groove along with the radial rotation of the piston relative to the cavity.

2. A blood dosing gun as claimed in claim 1 wherein: the first clamping grooves are arranged in pairs, and each pair of first clamping groove groups is centrosymmetric with respect to the piston rod; each group of the second clamping groove groups is also arranged in pairs, and each pair of the second clamping groove groups is symmetrical with respect to the center of the piston rod; the piston rod is located at the center of the top surface of the piston, and the piston is provided with two connecting rods which are symmetrical with respect to the center of the piston rod.

3. A blood dosing gun as claimed in claim 1 wherein: the notches of the first clamping groove and the second clamping groove are identical in size and structure and are located on the same cylindrical surface.

4. A blood dosing gun as claimed in claim 1 wherein: the inner side wall of the gun body is provided with a strip-shaped smooth surface, the strip-shaped smooth surface extends from the pressing end to the suction nozzle fixing port and is parallel to the length direction of the gun body, the strip-shaped smooth surface is located on one side of the first clamping groove group, the side of the strip-shaped smooth surface is not located on the side of the second clamping groove group, located on the same plane with the first clamping groove, close to the pressing end, of the first clamping groove group, and the strip-shaped smooth surface and the notch of the first clamping groove are located on the same cylindrical surface.

5. A blood typing loading gun as claimed in claim 4, wherein: a first limiting block is arranged at one end, close to the pressing end, of the strip-shaped smooth surface, a distance exists between the first limiting block and the first clamping groove group, and the vertical distance between the first limiting block and the end part of the pressing end is smaller than the vertical distance between the first clamping groove and the end part of the pressing end; the gun comprises a gun body, a piston rod, a limiting block, a pressing end, a rotating plate, a limiting protrusion, a strip-shaped limiting groove and a limiting groove, wherein the piston rod is sleeved with the rotating plate, the rotating plate is positioned between the limiting block and the end part of the pressing end and is rotatably connected with the inner wall of the gun body; the face of the rotating plate facing the suction nozzle fixing block is provided with a second limiting block, the second limiting block is located right above the clamping rod and abuts against the first limiting block along with the rotation of the piston rod, and at the moment, the clamping rod is located on the strip-shaped smooth surface.

6. A blood typing gun as claimed in claim 5 wherein: the end face of the pressing end is transparent, a plurality of capacity marks are arranged on the outer end face of the pressing end, each capacity mark corresponds to one first clamping groove group or one second clamping groove group, an indicating line is arranged on the face, facing the pressing end, of the rotating plate, and the indicating line is arranged right opposite to the second limiting block.

7. A blood typing gun as claimed in claim 5 wherein: the limiting bulges are arranged at intervals, and each limiting bulge is matched with one strip-shaped limiting groove.

8. A blood dosing gun as claimed in claim 1 wherein: the end part of one end of the piston rod, which is positioned outside the gun body, is provided with a pressing handle.

9. A blood dosing gun as claimed in claim 1 wherein: the first clamping groove and the second clamping groove are spherical grooves.

Technical Field

The invention relates to the technical field of sample adding guns, in particular to a sample adding gun for quantitatively adding blood types.

Background

The sample adding gun is an instrument with functions of sample precision liquid transfer, reagent dilution, distribution, uniform mixing and the like, and can be used in a diagnosis laboratory, a disease control laboratory, a life science laboratory, a judicial appraisal laboratory and the like in a hospital clinical laboratory. The current application of sample rifle of clinical laboratory of hospital generally is single-channel single function, match disposable rifle head and carry out the sample application, set for the range that will add the sample earlier, then take out blood sample, urine sample or other solution sample that wait to detect from the container, press the switch once only to add the sample of application of sample rifle the inside in the target container, when need add different volume samples in toward a plurality of containers, the range of application of sample need be reset to the measurement personnel, and carry out the repetitive operation of sample application again, such operation is comparatively troublesome, and consume more valuable time, thereby lead to inspector's work efficiency low, seriously, perhaps bring reaction error because the delay that leads to time consuming even.

Disclosure of Invention

In view of the above, there is a need to provide a sample adding gun for quantitatively adding blood types, which can realize continuous quantitative sample adding and conversion of different amounts, and is convenient to convert, less in time consumption and convenient to operate.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a sample adding gun for quantitatively adding blood types comprises a gun body, wherein one end of the gun body is a suction nozzle fixing port used for being connected with a suction nozzle, the other end of the gun body is a pressing end, the gun body is hollow, and a first card slot group and a plurality of second card slot groups are arranged on the inner side wall of the upper portion of the gun body; the first clamping groove group comprises a plurality of first clamping grooves which are arranged at intervals, all the first clamping grooves are sequentially arranged along the length direction of the gun body, and the distance between every two adjacent first clamping grooves is equal; each group of second clamping groove groups comprises at least two second clamping grooves, all the second clamping grooves in the same group are sequentially arranged at intervals along the length direction of the gun body, and the distance between every two adjacent second clamping grooves is equal but not equal to the distance between every two adjacent first clamping grooves; all the second clamping groove groups and the first clamping groove groups are arranged around the periphery of the gun body at intervals in sequence, the vertical distance between the second clamping grooves close to the pressing ends on the two adjacent groups of second clamping groove groups is equal to the distance between the two adjacent first clamping grooves, the second clamping grooves close to the pressing ends on the second clamping groove groups adjacent to the first clamping groove groups and the first clamping grooves close to the pressing ends of the first clamping groove groups are positioned on the same plane, each second clamping groove close to the pressing ends on each second clamping groove group is provided with one first clamping groove which is correspondingly positioned on the same plane, and the second clamping grooves close to the pressing ends on any two groups of second clamping groove groups are not positioned on the same plane;

the gun body is provided with a piston rod and a piston, the piston rod is arranged along the length direction of the gun body, one end of the piston rod is positioned outside the gun body, the other end of the piston rod is slidably arranged in the gun body through the pressing end of the gun body in a penetrating way and is connected with the piston, and the piston is slidably and rotatably connected with the inner wall of the gun body; the piston rod is connected with a connecting rod, the connecting rod is close to the pressing end relative to the piston and is vertical to the piston rod, a placing groove is arranged at one end of the connecting rod, which is far away from the piston rod, a compression spring is placed in the placing groove, the elastic direction of the compression spring is the radial direction of the gun body, one end of the compression spring, which is far away from the bottom of the placing groove, is connected with a clamping rod, the clamping rod is connected with the placing groove in a sliding way, one end of the spring, which is far away from the compression spring, extends out of the placing groove under the action of the compression spring, the end part of the other end of the spring is of a hemispheroid structure, the other end of the clamping rod is embedded into the next first clamping groove from the first clamping groove or embedded into the next second clamping groove from the second clamping groove along with the sliding of the piston relative to the length direction of the gun body, the piston is embedded into a second clamping groove which is positioned at the same height as the first clamping groove from the first clamping groove along with the radial rotation of the piston relative to the cavity.

Preferably, the first clamping grooves are arranged in pairs, and each pair of first clamping groove sets is symmetrical with respect to the center of the piston rod; each group of the second clamping groove groups is also arranged in pairs, and each pair of the second clamping groove groups is symmetrical with respect to the center of the piston rod; the piston rod is located at the center of the top surface of the piston, and the piston is provided with two connecting rods which are symmetrical with respect to the center of the piston rod.

Preferably, all the notches of the first clamping groove and the second clamping groove have the same size and the same structure, and are positioned on the same cylindrical surface.

Preferably, a strip-shaped smooth surface is arranged on the inner side wall of the gun body, extends from the pressing end to the suction nozzle fixing port and is parallel to the length direction of the gun body, the strip-shaped smooth surface is located on one side of the first clamping groove group, the side of the strip-shaped smooth surface is not located on the side of the second clamping groove group, which is located on the same plane with the first clamping groove of the first clamping groove group close to the pressing end, and the strip-shaped smooth surface and the notch of the first clamping groove are located on the same cylindrical surface.

Preferably, a first limiting block is arranged at one end, close to the pressing end, of the strip-shaped smooth surface, a distance exists between the first limiting block and the first clamping groove group, and the vertical distance between the first limiting block and the end part of the pressing end is smaller than the vertical distance between the first clamping groove and the end part of the pressing end; the gun comprises a gun body, a piston rod, a limiting block, a pressing end, a rotating plate, a limiting protrusion, a strip-shaped limiting groove and a limiting groove, wherein the piston rod is sleeved with the rotating plate, the rotating plate is positioned between the limiting block and the end part of the pressing end and is rotatably connected with the inner wall of the gun body; the face of the rotating plate facing the suction nozzle fixing block is provided with a second limiting block, the second limiting block is located right above the clamping rod and abuts against the first limiting block along with the rotation of the piston rod, and at the moment, the clamping rod is located on the strip-shaped smooth surface.

Preferably, the end face of the pressing end is transparent, the outer end face of the pressing end is provided with a plurality of capacity marks, each capacity mark corresponds to one first clamping groove group or one second clamping groove group, an indication line is arranged on the face, facing the pressing end, of the rotating plate, and the indication line is arranged right opposite to the second limiting block.

Preferably, the limiting protrusions are arranged at intervals, and each limiting protrusion is matched with one strip-shaped limiting groove.

Preferably, the end part of the piston rod, which is positioned outside the gun body, is provided with a pressing handle.

Compared with the prior art, the invention has the following beneficial effects:

the invention realizes quantitative sample adding with different sample adding amounts by arranging the first clamping groove group and the second clamping groove group, for example, the first clamping groove group can realize quantitative sample adding with 10 mu L, the second clamping groove group can realize quantitative sample adding with 50 mu L, in particular, the quantitative sample adding is realized by setting the distance between two adjacent first clamping grooves in the first clamping groove group and the distance between two adjacent second clamping grooves in the second clamping groove group, when the piston rod drives the piston and the connecting rod to slide along the length direction of the gun body, the piston moves a certain distance when a clamping rod on the connecting rod moves from one first clamping groove (second clamping groove) to the next first clamping groove (second clamping groove), and the distance promotes a certain amount of blood to flow from the suction nozzle to a target container, namely, the quantitative sample adding is realized, and in the quantitative sample adding process, the clamping rod moves from one first clamping groove (second clamping groove) to the next first clamping groove (second clamping groove), the kelly contracts to the standing groove because of the squeezing action of rifle internal wall in, when it removed next first draw-in groove (second draw-in groove), the kelly did not receive the squeezing action of rifle internal wall and stretched into the standing groove under compression spring's effect to during embedding next first draw-in groove (second draw-in groove), it stretches to contract one through the kelly, and the inspector can the perception whether accomplish a ration application of sample.

When the sample adding amount needs to be converted, for example, the quantitative amount of 10 μ L is changed into the quantitative amount of 50 μ L, or the quantitative amount of 50 μ L is changed into the quantitative amount of 10 μ L, only one-time rotation of the piston rod is needed, taking the example that the quantitative amount of 10 μ L is changed into the quantitative amount of 50 μ L, the piston rod is rotated, the piston rod drives the connecting rod and the piston to rotate, the clamping rod on the connecting rod rotates to the second clamping groove with the same height from the first clamping groove in parallel, in the rotating process, the detector can know whether the conversion is in place or not through one shrinkage and one extension of the clamping rod, and after the conversion is in place, quantitative sample adding of.

To sum up, the quantitative application of sample of two kinds of different application sample volumes can be realized to this application, and easy and simple to handle, simultaneously, still can realize continuous application of sample, and the application of sample is efficient, and is consuming time few, can improve surveyor's work efficiency.

Drawings

Fig. 1 is a partial cross-sectional view of the present invention.

Fig. 2 is a partial structural view of the gun body in fig. 1.

Fig. 3 is a plan view of fig. 1 without the pressing handle.

Fig. 4 is an enlarged view at a in fig. 1.

Fig. 5 is a schematic structural view of the bayonet rod of fig. 4 inserted into the first bayonet slot.

Description of the main elements

In the figure: the gun comprises a gun body 1, a suction nozzle fixing port 11, a pressing end 12, a piston rod 2, a strip-shaped limiting groove 21, a pressing handle 22, a piston 3, a connecting rod 4, a placing groove 41, a compression spring 42, a clamping rod 43, a rotating plate 5, a limiting protrusion 51, a second limiting block 52, an indicating line 53, a strip-shaped smooth surface 6, a first limiting block 61, a first clamping groove 7, a second clamping groove 8 and a capacity mark 9.

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1 to 5, in a preferred embodiment of the present invention, a sample adding gun for quantitatively adding blood types includes a gun body 1, one end of the gun body 1 is a suction nozzle fixing port 11 for connecting with a suction nozzle, the other end is a pressing end 12, the gun body 1 is hollow, and the inner side wall of the upper portion of the gun body is provided with a first slot set and a plurality of second slot sets. The first clamping groove group comprises a plurality of first clamping grooves 7 which are arranged at intervals, all the first clamping grooves 7 are sequentially arranged along the length direction of the gun body 1, and the distance between every two adjacent first clamping grooves 7 is equal; each group of second clamping grooves comprises at least two second clamping grooves 8, all the second clamping grooves 8 in the same group are sequentially arranged at intervals along the length direction of the gun body 1, and the distance between every two adjacent second clamping grooves 8 is equal but not equal to the distance between every two adjacent first clamping grooves 7; all the second clamping groove groups and the first clamping groove groups are arranged around the periphery of the gun body 1 at intervals in sequence, the vertical distance between the second clamping grooves 8, close to the pressing end 12, on the two adjacent second clamping groove groups is equal to the distance between the two adjacent first clamping grooves 7, the second clamping grooves 8, close to the pressing end 12, on the second clamping groove groups adjacent to the first clamping groove groups are located on the same plane as the first clamping grooves 7, close to the pressing end 12, of the first clamping groove groups, the second clamping grooves 8, close to the pressing end 12, on each second clamping groove group are provided with one first clamping groove 7 and located on the same plane corresponding to the first clamping groove 8, and the second clamping grooves 8, close to the pressing end 12, on any two second clamping groove groups are not located on the same plane. The gun body 1 is provided with a piston rod 2 and a piston 3, the piston rod 2 is arranged along the length direction of the gun body 1, one end of the piston rod 2 is positioned outside the gun body 1, the other end of the piston rod is slidably arranged in the gun body 1 through a pressing end 12 of the gun body 1 in a penetrating manner and is connected with the piston 3, and the piston 3 is slidably and rotatably connected with the inner wall of the gun body 1; the piston rod 2 is connected with a connecting rod 4, the connecting rod 4 is close to the pressing end 12 relative to the piston 3 and is perpendicular to the piston rod 2, a placing groove 41 is formed in one end, far away from the piston rod 2, of the connecting rod 4, a compression spring 42 is placed in the placing groove 41, the elastic direction of the compression spring 42 is the radial direction of the gun body 1, one end, far away from the bottom of the placing groove 41, of the compression spring 42 is connected with a clamping rod 43, the clamping rod 43 is connected with the placing groove 41 in a sliding mode, one end, far away from the compression spring 42, of the clamping rod 43 extends out of the placing groove 41 under the action of the compression spring 42, the end of the other end is of a hemispherical structure, the end of the clamping rod 43 is embedded into a next first clamping groove 7 or a next second clamping groove 8 from the first clamping groove 7 along with sliding of the piston 3 in the length direction relative to the gun body 1, and is embedded into the next second clamping groove 8 from the first clamping groove 7 along with And into the second card slot 8.

The invention realizes quantitative sample adding with different sample adding amounts by arranging the first card slot group and the second card slot group, for example, the first card slot group can realize quantitative sample adding with 10 mu L, the second card slot group can realize quantitative sample adding with 50 mu L, specifically, the quantitative sample adding is realized by setting the distance between two adjacent first card slots 7 in the first card slot group and the distance between two adjacent second card slots 8 in the second card slot group, when the piston rod 2 drives the piston 3 and the connecting rod 4 to slide along the length direction of the gun body 1, the clamping rod 43 on the connecting rod 4 moves from one first card slot 7 to the next first card slot 7 or from one second card slot 8 to the next second card slot 8, the piston 3 moves with a certain distance, the distance promotes a certain amount of blood to flow from the suction nozzle to the target container, namely, the quantitative sample adding is realized, in the quantitative sample adding process, the clamping rod 43 moves to the process of the next first clamping groove 7 (second clamping groove 8) from one first clamping groove 7 (second clamping groove 8), the clamping rod 43 retracts to the placing groove 41 due to the extrusion effect of the inner wall of the gun body 1, when the clamping rod moves to the next first clamping groove 7 (second clamping groove 8), the clamping rod 43 does not extend into the placing groove 41 under the effect of the compression spring 42 due to the extrusion effect of the inner wall of the gun body 1, the clamping rod is embedded into the next first clamping groove 7 (second clamping groove 8), the clamping rod 43 extends in a retracting manner, and a detector can sense whether quantitative sample adding is finished or not. When the sample adding amount needs to be converted, for example, 10 μ L of the fixed amount is changed into 50 μ L of the fixed amount, or 50 μ L of the fixed amount is changed into 10 μ L of the fixed amount, only one time of rotating the piston rod 2 is needed, taking the example that 10 μ L of the fixed amount is changed into 50 μ L of the fixed amount, the piston rod 2 is rotated, the piston rod 2 drives the connecting rod 4 and the piston 3 to rotate, the clamping rod 43 on the connecting rod 4 rotates to the second clamping groove 8 at the same height from the first clamping groove 7 in parallel, in the rotating process, the clamping rod 43 stretches and retracts to enable a detector to know whether the conversion is in place, and after the conversion is in place, the fixed amount sample adding of the other sample adding amount can be realized by pressing the piston rod 2.

Preferably, the first clamping grooves are arranged in pairs, and each pair of the first clamping groove sets is symmetrical with respect to the center of the piston rod 2; each group of the second clamping groove groups is also arranged in pairs, and each pair of the second clamping groove groups is centrosymmetric with respect to the piston rod 2; the piston rod 2 is located at the center of the top surface of the piston 3, two connecting rods 4 are arranged on the piston 3, and the two connecting rods 4 are centrosymmetric relative to the piston rod 2. The end part of one end of the piston rod 2, which is positioned outside the gun body 1, is provided with a pressing handle 22, and the side surface of the pressing handle 22 is provided with anti-skid grains so as to press and rotate the piston rod 2. The notches of the first clamping groove 7 and the second clamping groove 8 are the same in size and structure and are located on the same cylindrical surface, so that the clamping rod 43 can move conveniently.

Further, a strip-shaped smooth surface 6 is arranged on the inner side wall of the gun body 1, the strip-shaped smooth surface 6 extends from the pressing end 12 to the suction nozzle fixing port 11 and is parallel to the length direction of the gun body 1, the strip-shaped smooth surface 6 is located on one side of the first clamping groove group, the one side is not located on the side of the second clamping groove group located on the same plane as the first clamping groove 7 of the first clamping groove group close to the pressing end 12, the strip-shaped smooth surface 6 and the notch of the first clamping groove 7 are located on the same cylindrical surface, so that the piston rod 2 can conveniently slide and suck blood through the strip-shaped smooth surface 6, that is, the clamping rod 43 rotates to the area where the strip-shaped smooth surface 6 is located through rotating the piston rod 2, in the sliding and sucking process of the piston rod 2, the clamping rod 43 moves upwards on the strip-shaped smooth surface 6, and the strip-shaped smooth surface 6 has no clamping groove, and therefore the piston rod 2 can conveniently.

Preferably, in order to conveniently know whether the clamping rod 43 rotates to the strip-shaped smooth surface 6, a first limiting block 61 is arranged at one end, close to the pressing end 12, of the strip-shaped smooth surface 6, a distance exists between the first limiting block 61 and the first clamping groove group, and the vertical distance between the first limiting block 61 and the end of the pressing end 12 is smaller than the vertical distance between the first clamping groove 7 and the end of the pressing end 12; the piston rod 2 is sleeved with a rotating plate 5, the rotating plate 5 is located between the limiting block and the end part of the pressing end 12 and is rotatably connected with the inner wall of the gun body 1, a limiting protrusion 51 is arranged at the joint of the rotating plate 5 and the piston rod 2, a strip-shaped limiting groove 21 is arranged on the rod body of the piston rod 2, the strip-shaped limiting groove 21 is arranged along the length direction of the piston rod 2, and the piston rod 2 is slidably connected with the rotating plate 5 in a manner that the limiting protrusion 51 is clamped in the strip-shaped limiting groove 21, so that the piston rod 2 can drive the rotating plate 5 to rotate and can slide relative to the rotating plate 5; the rotor plate 5 is provided with second stopper 52 towards on the face of suction nozzle fixed block, second stopper 52 is located the kelly 43 directly over, and it follows the first stopper 61 of rotation butt of piston rod 2, at this moment, the kelly 43 is located the strip in the same direction as the sliding surface 6, that is to say, restricts the relative rifle body 1 rotation of piston rod 2 through the mode of the first stopper 61 of second stopper 52 butt, can learn whether the kelly 43 has rotated to the strip in the same direction as the sliding surface 6. Preferably, at least two limiting protrusions 51 are arranged at intervals, and each limiting protrusion is matched with one strip-shaped limiting groove 21, so that the piston rod 2 can drive the rotating plate 5 to rotate better, and the use safety of the rotating plate 5 is improved.

Preferably, the end face of the pressing end 12 is transparent, a plurality of capacity marks 9 are arranged on the end face of the pressing end, each capacity mark 9 corresponds to one first slot group or second slot group or strip-shaped smooth surface 6, an indication line 53 is arranged on the surface of the rotating plate 5 facing the pressing end 12, the indication line 53 is over against the second limiting block 52, so that the quantitative sample adding state of the device can be known by checking the mode that the indication line 53 is aligned with the capacity mark 9, and the sample adding of a detector is facilitated.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.