A new large volume injection kit

Abstract

The present invention discloses a new large-volume injection kit, including an injection module and an injection needle row; the injection needle row is provided with an injection needle and a plunger head, the injection needle forms an external thread section above the needle head, and the injection needle forms a sealing surface above the external thread section, a mounting channel is provided in the middle of the plunger head for the injection needle to pass through, an internal thread section is formed inside the mounting channel, the plunger head is fixed on the injection needle through the cooperation of the internal thread section and the external thread section, an inner ring groove located above the internal thread section is also formed inside the mounting channel, and a first O-ring is built into the inner ring groove to seal the sealing surface; multiple rows and columns of injection seats are evenly distributed on the injection module, and a groove is provided on the upper surface of the injection seat, and the injection needle row drives the plunger head of the injection needle to be inserted into the groove of the injection seat from top to bottom, and the plunger head is sealed and inserted in the groove. When the present case is used, a plunger head is added to the injection needle, and the plunger head is equipped with internal and external O-rings, and there is no need to set an O-ring on the injection seat, which greatly reduces the cost and increases the qualified rate.

Description

Technical Field

[0001] The invention relates to the technical field of experimental instruments, in particular to a new large-volume sample injection kit. Background Art

[0002] The existing high-throughput large-volume injection kit includes an injection module and an injection needle row arranged above the injection module, wherein a single row of common injection needles 1' are arranged on the injection needle row, and multiple rows and columns of injection seats 2' are evenly distributed on the injection module, and the injection seats are used to insert the single row of common injection needles from top to bottom, such as Figure 1 As shown, an O-ring 3' is provided inside the injection seat to ensure sealing during insertion. The pipeline below the injection seat can be connected to the sample bottle. The injection needle can draw the sample from the sample bottle through negative pressure, thereby performing large-volume injection.

[0003] The defect of this existing injection kit is that if a large number of samples need to be loaded, then the number of O-rings matching each injection seat will also be large. If each injection seat is equipped with an O-ring, there will be two problems. One is that the cost is too high, and the other is that there is no way to ensure that each injection seat is sealed. Poor sealing will lead to problems with the pass rate of large volumes. Summary of the invention

[0004] The purpose of the present invention is to provide a new large-volume sample injection kit to solve the above-mentioned problems, greatly save costs, and improve the qualified rate of large-volume sample injection.

[0005] To achieve the above object, the solution of the present invention is: a new large volume injection kit, comprising an injection module and an injection needle row arranged above the injection module;

[0006] The injection needle row is provided with a single row of injection needles and plunger heads, the injection needles are formed with an external thread section above the needle heads, and the injection needles are formed with a sealing surface above the external thread section, a mounting channel is provided in the middle of the plunger head for the injection needles to pass through, an internal thread section is formed inside the mounting channel, the plunger head is fixed on the injection needles through the cooperation of the internal thread section and the external thread section, an inner ring groove is also formed inside the mounting channel, the inner ring groove is located above the internal thread section, and a first O-ring is built into the inner ring groove to seal and cooperate with the sealing surface;

[0007] The injection module is evenly distributed with multiple rows and columns of injection seats, and a groove is provided on the upper surface of the injection seat. The injection needle row drives the plunger head of the injection needle to be inserted into the groove of the injection seat from top to bottom, and the plunger head is sealed and inserted in the groove. The bottom of the groove is connected to an external sample bottle through a pipeline.

[0008] Preferably, an outer ring groove is provided on the outside of the plunger head, a second O-ring is built into the outer ring groove, and the plunger head is sealed and inserted into the groove through the second O-ring.

[0009] Preferably, the upper end of the internal thread section forms an upper step surface, and the lower end of the sealing surface forms a lower step surface that matches the upper step surface.

[0010] Preferably, the injection module and the injection needle row are each provided with a motor, and driven by the motor, the injection module can move forward and backward relative to the injection needle row, and the injection needle row can move up and down relative to the injection module.

[0011] Preferably, the end of the needle is notched.

[0012] After adopting the above scheme, compared with the original O-ring that needs to be assembled on each injection seat, the beneficial effect of the present invention is that: the present invention only needs to add a section of thread to the original injection needle to match a plunger head, and match the inner and outer O-rings on the plunger head, so that the sealing of the injection needle during each injection can be guaranteed, and there is no need to assemble O-rings on each injection seat, so that the O-rings on the large-volume injection seat can be completely cancelled, which greatly saves the cost and assembly efficiency of the injection kit, and thus improves the qualified rate of injection. The existing ordinary injection needle has a relatively single function and can only perform functions such as liquid suction and spitting that do not require sealing. The injection needle in this case only adds a section of thread on the needle head, but can add various accessories to the needle head to realize new functions, such as adding a plunger head to become a plunger rod, and adding a sensor to realize functions such as liquid level detection. The replacement of the plunger head does not require the use of tools such as wrenches. You only need to manually unscrew the plunger head to remove the plunger head, and then replace the plunger head of other specifications to complete the rapid replacement of plunger heads of different specifications, which is used to match injection seats of different specifications, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an existing common injection needle and an injection seat;

[0014] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0015] Figure 3 It is a structural schematic diagram of a sample injection module according to an embodiment of the present invention;

[0016] Figure 4 It is a schematic diagram of the structure of an injection needle before the plunger head is matched with each other according to an embodiment of the present invention;

[0017] Figure 5 It is a schematic diagram of the structure of the injection needle and the plunger head after matching in one embodiment of the present invention;

[0018] Figure 6 It is a schematic structural diagram of an injection needle with a plunger head before being matched with an injection seat according to an embodiment of the present invention;

[0019] Figure 7It is a cross-sectional schematic diagram of a sample injection module according to an embodiment of the present invention.

[0020] Description of labels:

[0021] Injection module 1, injection module motor 11, injection seat 12, groove 121, injection tube 122, injection needle row 2, injection needle 21, needle head 211, external thread section 212, sealing surface 213, lower step surface 214, plunger head 22, installation channel 221, internal thread section 222, inner ring groove 223, first O-ring 224, outer ring groove 225, second O-ring 226, upper step surface 227, injection needle row motor 23, injection tube 3. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The present invention provides a new large volume injection kit, such as Figure 2 As shown, it includes a sampling module 1 and a sampling needle row 2 arranged above the sampling module 1, and the sampling module 1 and the sampling needle row 2 are respectively provided with motors 11, 23, and driven by the motors, the sampling module 1 can move forward and backward relative to the sampling needle row 2, and the sampling needle row 2 can move up and down relative to the sampling module 1;

[0024] like Figure 4 and Figure 5 As shown, a single row of injection needles 21 and plunger heads 22 are provided on the injection needle row, the injection needle 21 forms an external thread section 212 above the needle head 211, and the injection needle 21 forms a sealing surface 213 above the external thread section 212, a mounting channel 221 is provided in the middle of the plunger head 22 for the injection needle 21 to pass through, an internal thread section 222 is formed inside the mounting channel 221, the plunger head 22 is fixed on the injection needle 21 through the cooperation of the internal thread section 222 and the external thread section 212, an inner ring groove 223 is further formed inside the mounting channel 221, the inner ring groove 223 is located above the internal thread section 222, and a first O-ring 224 is built in the inner ring groove 223 to seal and cooperate with the sealing surface 213;

[0025] Combination Figure 3 , Figure 6 and Figure 7 As shown, the injection module 1 is evenly distributed with multiple rows and columns of injection seats 12, and the upper surface of the injection seat 12 is provided with a groove 121. When working, the injection needle row 2 can drive the plunger head 22 of the injection needle 21 to be inserted from top to bottom into the groove 121 of the injection seat 12, and the plunger head 22 is sealed and inserted in the groove 121. The sealing structure here can adopt the same sealing structure as the sealing surface, such as Figure 5As shown, the outer ring groove 225 is provided on the outside of the plunger head 22, and the second O-ring 226 is built in the outer ring groove 225, so that the plunger head 22 is sealed and inserted in the groove 121 through the second O-ring 226. The number of the inner ring groove 223 and the outer ring groove 225 can be increased according to the axial length of the plunger head 22, and the number of correspondingly placed O-rings will increase accordingly, and the sealing will be better. The bottom of the groove 121 is opened to be used for installing the pipeline interface of the injection tube to connect the sample bottle (not shown in the figure).

[0026] like Figure 4 and Figure 5 As shown, the upper end of the internal thread section 222 forms an upper step surface 227, and the lower end of the sealing surface 213 forms a lower step surface 214 that cooperates with the upper step surface 227. Through the cooperation of the upper step surface 227 and the lower step surface 214, the plunger head 22 can be positioned and cooperated on the injection needle 21.

[0027] The end of the needle 211 is a needle tip, and the needle tip has a notch to ensure that the needle tip will not seal with the flat bottom of the sample bottle.

[0028] When the present invention is working, the injection needle 21 on the injection needle row 2 is first screwed onto the plunger head 22, and then the injection needle row motor 23 is started to drive the needle row to move up and down, and the injection module motor 11 drives the large-volume injection module 1 to move forward and backward. Each time the injection needle 21 moves forward or backward, it is inserted into a row of injection seats 12 to absorb the sample, and has good air tightness when inserted. After completing one row, the large-volume injection module 1 moves forward one grid, and the injection needle 21 is inserted into the second row of injection seats 12 to continue loading the sample. Therefore, it can be seen that in this case, a plunger head is added to the original injection needle, and the plunger head is equipped with inner and outer O-rings, so that the O-rings on the large-volume injection seat can be completely eliminated, and only the smooth surface is retained, thereby greatly reducing costs and increasing the pass rate to meet the needs of large and small enterprises.

[0029] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. A new large volume injection kit, characterized by: It includes a sampling module and a sampling needle row arranged above the sampling module; The injection needle row is provided with a single row of injection needles and plunger heads, the injection needles are formed with an external thread section above the needles, the external thread section protrudes radially outwardly beyond the outer diameter of the needles, and the injection needles are formed with a sealing surface above the external thread section, a mounting channel is provided in the middle of the plunger head for the injection needles to pass through, an internal thread section is formed inside the mounting channel, the internal thread section extends radially into the mounting channel, the plunger head is fixed on the injection needles through the cooperation of the internal thread section and the external thread section, an annular gap is formed between the needles and the inner wall of the mounting channel, an inner ring groove is also formed inside the mounting channel, the inner ring groove is located above the internal thread section, and a first O-ring is built into the inner ring groove to seal and cooperate with the sealing surface; The upper end of the internal thread section forms an upper step surface, and the lower end of the sealing surface forms a lower step surface that matches the upper step surface; The end of the needle is a needle tip, and the needle tip has a notch to ensure that the needle tip will not seal with the bottom of the sample bottle; The injection module is evenly distributed with multiple rows and columns of injection seats, the upper surface of the injection seat is provided with a groove, the injection needle row drives the plunger head of the injection needle to be inserted into the groove of the injection seat from top to bottom, and the plunger head is sealed and inserted in the groove.

2. A novel large volume injection kit as claimed in claim 1, characterized in that: An outer ring groove is provided on the outside of the plunger head, a second O-ring is built in the outer ring groove, and the plunger head is inserted in the groove through the second O-ring for sealing.

3. A novel large volume injection kit as claimed in claim 1, characterized in that: The injection module and the injection needle row are each provided with a motor, and driven by the motor, the injection module can move forward and backward relative to the injection needle row, and the injection needle row can move up and down relative to the injection module.

4. A novel large volume injection kit as claimed in claim 1, characterized in that: The needle has a notch at its distal end.

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