CN212111462U - Sampling needle protection device - Google Patents
Sampling needle protection device Download PDFInfo
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- CN212111462U CN212111462U CN202020738147.1U CN202020738147U CN212111462U CN 212111462 U CN212111462 U CN 212111462U CN 202020738147 U CN202020738147 U CN 202020738147U CN 212111462 U CN212111462 U CN 212111462U
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- needle
- sample injection
- seat
- guide rod
- bottle pressing
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Abstract
The utility model discloses a sample injection needle protection device, which comprises a frame, a sample injection module and a driving device for driving the sample injection module to lift, wherein the driving device is arranged on the frame; the guide rod seat and the fixed frame are fixedly connected to the lifting bearing platform; one end of the bottle pressing guide shaft is connected with the guide rod seat in a sliding manner, and the other end of the bottle pressing guide shaft is fixedly connected with the bottle pressing boot; the bottle pressing guide shaft is provided with a limiting part which is stopped by a stopping part of the needle seat or the lifting bearing platform, and the bottom of the bottle pressing boot is provided with an inserting part for accommodating the insertion of the sampling needle; one end of the guide rod is fixedly connected with the fixing frame, the other end of the guide rod is fixedly connected with the lifting bearing table, and the guide rod penetrates through the needle seat and is in sliding connection with the needle seat; the sample injection needle is fixedly connected on the needle seat through the sample injection needle block. The utility model provides a pair of syringe protection device through syringe and the synchronous associative motion of bottle boots of pressing, has realized the effective protection to the syringe.
Description
Technical Field
The utility model relates to an autosampler field, concretely relates to sampling needle protection device.
Background
In the field of instrument analysis, the automatic sample injector is an auxiliary device, can quantitatively sample and send a sample into a detection system, and greatly improves the working efficiency. The sample injection needle of the automatic sample injector is required to have certain hardness and toughness, but the sample injection needle is easily broken or damaged under the action of external force. In the prior art, the sampling needle is directly inserted into the sampling bottle, or even if the sampling needle protection device is provided, the sampling needle is small in size, long and thin, the sampling needle protection device is also complex in structure, the whole assembly process is complex, the production cost is high, moreover, the position for sampling needle protection needs to be set with an initial point and a protection stroke, and once the protection stroke is beyond the range of the set protection stroke, the sampling needle cannot be protected at any random position in the needle insertion process.
How to design an effective device for protecting the sample injection needle in the whole process of needle injection is the technical problem to be solved by the utility model.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem in the background art and providing a sampling needle protection device. The utility model provides a pair of syringe protection device through syringe and the synchronous associative motion of bottle boots of pressing, has realized the effective protection to the syringe.
The above technical purpose of the present invention is achieved by the following technical solutions:
a sample injection needle protection device comprises a rack, a sample injection module and a driving device for driving the sample injection module to lift, wherein the driving device is arranged on the rack;
the sample injection module comprises a lifting bearing platform, a guide rod seat, a bottle pressing guide shaft, a fixing frame, a guide rod, a needle seat, a sample injection needle block, a sample injection needle and a bottle pressing boot;
the guide rod seat and the fixed frame are fixedly connected to the lifting bearing platform;
one end of the bottle pressing guide shaft is connected with the guide rod seat in a sliding manner, and the other end of the bottle pressing guide shaft is fixedly connected with the bottle pressing boot; the bottle pressing guide shaft is provided with a limiting part which is stopped by a stop part of the needle seat or the lifting bearing platform, and the bottom of the bottle pressing boot is provided with an insertion part for accommodating the insertion of a sample injection needle;
one end of the guide rod is fixedly connected with the fixing frame, the other end of the guide rod is fixedly connected with the lifting bearing table, and the guide rod penetrates through the needle seat and is connected with the needle seat in a sliding manner; the sample injection needle is fixedly connected on the needle seat through the sample injection needle block.
According to the sample injection needle protection device, the limiting part is stopped by the needle seat.
According to the sample injection needle protection device, the bottle pressing guide shaft is sleeved with the bottle pressing large spring, one end of the bottle pressing large spring abuts against the guide rod seat, and the other end of the bottle pressing large spring abuts against the limiting portion of the bottle pressing guide shaft.
According to the sample injection needle protection device, the guide rod is sleeved with the adjusting spring, one end of the adjusting spring is abutted to the fixing frame, and the other end of the adjusting spring is abutted to the needle seat.
The injection needle protection device further comprises a detection device, the detection device comprises a detection part and a detected part, the detection part is fixedly installed on one of the needle seat or the rack, the detected part is fixedly installed on the other of the needle seat or the rack, and the detection part and the detected part are matched with each other to detect the displacement of the injection needle.
According to the sample injection needle protection device, the detection part is a correlation type photoelectric switch or a displacement sensor.
As above a syringe needle protection device, the detection portion is correlation formula photoelectric switch, it is the opto-coupler separation blade to be detected the portion, the opto-coupler separation blade sets up on the needle file, correlation formula photoelectric switch is fixed to be set up in the frame, the opto-coupler separation blade is corresponding with correlation formula photoelectric switch's opening groove position.
The injection needle protection device comprises a motor base and a back plate, wherein the driving device comprises a lead screw motor, a lead screw and a lead screw sliding block, the lead screw motor is arranged on the motor base, the lead screw and the lead screw sliding block form a lead screw transmission mechanism, the lead screw is driven by the lead screw motor, one end of the lead screw sliding block is fixedly connected with a lifting bearing platform, and the other end of the lead screw sliding block is connected with the back plate in a sliding mode through a sliding rail.
According to the injection needle protection device, the insertion part is a round hole.
According to the sample injection needle protection device, the inner surface of the bottle pressing shoe is in a horn shape with a narrow upper part and a wide lower part.
Compared with the prior art, the utility model has the advantages of it is following and beneficial effect:
1. the utility model provides a pair of sampling needle protection device, under drive arrangement's drive, sampling needle and the synchronous associative motion of bottle boots of pressing for sampling needle just inserts the portion of inserting of pressing bottle boots at initial position and obtains the protection with this.
2. The utility model provides a pair of syringe protection device, the cover is equipped with the big spring of pressure bottle on the pressure bottle guiding axle, provides a decurrent power for pressing the bottle guiding axle, provides the effect of steady state pressure for pressing bottle boots to be convenient for the better location of syringe.
3. The utility model provides a pair of sampling needle protection device, the cover is equipped with adjusting spring on the guide bar, adjusting spring plays the effect that in time resets for the sampling needle.
4. The utility model provides a pair of syringe protection device, still including the detection portion that is used for detecting the position of syringe, by the detection portion, by the automatic control module communication connection of detection portion and sample injector, through the detection portion with by the feedback of detection portion, in time suspend the action of syringe, further protection the syringe and avoided the too big or maloperation of atress and damage.
5. The utility model provides a pair of syringe protection device, drive arrangement are along with lead screw slider along the slide rail drive syringe upper and lower direction lift, under the guide effect of guide bar for the position location of the appearance of syringe is more accurate, has prevented the mistake of syringe and has inserted, has further protected the syringe.
6. The utility model provides a pair of sampling needle protection device presses the wide horn-shaped structure in the narrow lower part in bottle boots upper portion to make and press bottle boots and sampling bottle to form better seal structure when advancing the sampling bottle on the one hand, and on the other hand has further guaranteed the accurate nature of inserting of sampling needle, has prevented the mistake of sampling needle to insert, has further protected the sampling needle.
7. The utility model provides a pair of sampling needle protection device does not need complicated protection and guiding mechanism, simple structure, and is with low costs.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a three-dimensional structure for protecting a sample injection needle of the present invention;
fig. 2 is a schematic side view of the sample injection needle protection device of the present invention;
fig. 3 is a schematic front view of a protection device for a sample injection needle according to the present invention;
FIG. 4 is a schematic view of the cross-section A of FIG. 3;
fig. 5 is a partially enlarged view of part B of fig. 4.
1-a screw motor, 2-a guide rod seat, 3-a bottle pressing guide shaft, 4-an open groove, 5-a bottle pressing large spring, 6-a fixed frame, 7-a guide rod, 8-an adjusting spring, 9-a needle seat, 10-a sample injection needle block, 11-a sample injection needle, 12-a bottle pressing shoe, 13-a motor base, 14-a screw rod sliding block, 15-a sliding rail, 16-a light coupling baffle, 17-a back plate, 18-a lifting bearing platform, 31-a stop plate, 181-a limiting part, 101-a screw rod and 121-an inserting part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained without creative work by the ordinary skilled person in the art all belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 1 to 4, a sample injection needle protection device includes a rack, a sample injection module, and a driving device for driving the sample injection module to ascend and descend, wherein the driving device is disposed on the rack; the sample injection module comprises a lifting bearing platform 18, a guide rod seat 2, a bottle pressing guide shaft 3, a fixing frame 6, a guide rod 7, a needle seat 9, a sample injection needle block 10, a sample injection needle 11 and a bottle pressing shoe 12; the guide rod seat 2 and the fixed frame 6 are fixedly connected to the lifting bearing platform 18; one end of the bottle pressing guide shaft 3 is connected with the guide rod seat 2 in a sliding manner, and the other end of the bottle pressing guide shaft is fixedly connected with the bottle pressing shoe 12; the bottle pressing guide shaft 3 is provided with a limiting part 31, the limiting part 31 is stopped by a needle seat 9 or a stopping part 181 of the lifting bearing platform 18, and the bottom of the bottle pressing boot 12 is provided with an inserting part 121 for accommodating the sample injection needle 11 to insert; the insertion portion 121 serves to protect the injection needle 11 and guide the injection needle, preferably, the insertion portion 121 is a circular hole, and the insertion portion 121 may also be a through groove.
One end of the guide rod 7 is fixedly connected with the fixed frame 6, the other end of the guide rod is fixedly connected with the lifting bearing platform 18, and the guide rod 7 penetrates through the needle seat 9 and is in sliding connection with the needle seat 9; the sample injection needle 11 is fixedly connected to the needle seat 9 through the sample injection needle block 10.
Preferably, the stopper 31 is stopped by the needle holder 9.
Preferably, the bottle pressing guide shaft 3 is sleeved with a bottle pressing large spring 5, one end of the bottle pressing large spring 5 abuts against the guide rod seat 2, and the other end of the bottle pressing large spring abuts against the limiting part 31 of the bottle pressing guide shaft 3. The bottle pressing large spring 5 provides a downward force for the bottle pressing guide shaft 3.
Preferably, the guide rod 7 is sleeved with an adjusting spring 8, one end of the adjusting spring 8 abuts against the fixing frame 6, and the other end of the adjusting spring 8 abuts against the needle seat 9.
Preferably, still include detection device, detection device includes the detection portion and is detected the portion, detection portion fixed mounting is on one of needle file 9 or frame, it is on the other of needle file 9 or frame to be detected portion fixed mounting, the detection portion with be detected the portion and mutually support and be used for detecting the displacement volume of advancing needle 11.
Preferably, the detection portion is correlation formula photoelectric switch, it is opto-coupler separation blade 16 to be detected the portion, opto-coupler separation blade 16 sets up on needle file 9, correlation formula photoelectric switch is fixed to be set up in the frame, opto-coupler separation blade 16 is corresponding with correlation formula photoelectric switch's opening recess 4 positions, and after needle file 9 went upward a section distance, opto-coupler separation blade 16 inserted to opening recess 4. Of course, the detecting unit is not limited to the correlation type photoelectric switch, but may be a displacement sensor, as long as it can detect and sense the displacement of the injection needle 11, and communicate with the automatic control module of the injector, and stop the movement of the injection needle in time through the feedback from the detected unit.
Preferably, the rack includes motor base 13 and backplate 17, drive arrangement includes screw motor 1, lead screw 101 and lead screw slider 14, screw motor 1 sets up on motor base 13, lead screw 101 and lead screw slider 14 constitute screw drive mechanism, lead screw 101 is driven by screw motor 1, the one end and the lift plummer 18 fixed connection of lead screw slider 14, the other end and the backplate 17 of lead screw slider 14 pass through slide rail 15 sliding connection. Of course, the slide rail 15 may be one, two or more.
Referring to fig. 5, preferably, the inner surface of the bottle-pressing shoe 12 is formed in a horn shape having a narrow upper portion and a wide lower portion. The horn-shaped structure with the narrow upper part and the wide lower part enables the bottle pressing shoe 12 and the sample injection bottle (not shown in the figure) to form a better sealing structure when the bottle pressing shoe 12 presses the sample injection bottle (not shown in the figure), and further ensures the insertion accuracy of the sample injection needle 11.
The utility model discloses a theory of operation is:
during sample injection, the screw motor 1 drives the screw slider 14 to move up and down along the slide rail 15 by rotating the screw 101, the screw slider 14 drives the guide rod seat 2 fixedly connected with the lifting bearing platform 18 and the needle seat 9 to move up and down together, and further drives the sample injection needle 11 and the bottle pressing shoe 12 to move up and down synchronously, and in the process, the needle point of the sample injection needle 11 is always inserted into the insertion part 121 of the bottle pressing shoe 12, so that the sample injection needle 11 is always in a protection state; when the bottle pressing shoe 12 presses the sample injection bottle (not shown in the figure) so that the bottle pressing shoe 12 does not move downwards any more, the large bottle pressing spring 5 plays a role of providing steady-state pressure for the bottle pressing part 122, the sample injection needle 11 continues to move downwards under the driving of the lead screw motor 1, when the sample injection is normally carried out, the resistance force received by the sample injection needle 1 is small, the adjusting spring 8 locks the sample injection needle 11 at the bottom of the sample injection bottle so as to prevent the sample injection needle 11 from shaking, but when the sample injection needle 11 continues to be inserted and receives higher resistance force than the normal sample injection, the sample injection needle 11 is under the resistance force action, so that the optical coupling baffle piece 16 arranged on the needle seat 9 also moves upwards along with the needle seat 9, after the needle seat 9 moves upwards for a certain distance, the optical coupling baffle piece 16 is inserted into the open groove 4 to trigger the optical coupling switch arranged on the open groove 4, the open groove 4 provides a stroke, the action of the sample injection needle 11 is stopped in time, so that the sample injection needle 11 is prevented from being damaged due to overlarge force or misoperation.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A sample injection needle protection device is characterized by comprising a rack, a sample injection module and a driving device for driving the sample injection module to ascend and descend, wherein the driving device is arranged on the rack;
the sample injection module comprises a lifting bearing platform (18), a guide rod seat (2), a bottle pressing guide shaft (3), a fixing frame (6), a guide rod (7), a needle seat (9), a sample injection needle block (10), a sample injection needle (11) and a bottle pressing shoe (12);
the guide rod seat (2) and the fixed frame (6) are fixedly connected to the lifting bearing platform (18);
one end of the bottle pressing guide shaft (3) is connected with the guide rod seat (2) in a sliding manner, and the other end of the bottle pressing guide shaft is fixedly connected with the bottle pressing shoe (12); a limiting part (31) is arranged on the bottle pressing guide shaft (3), the limiting part (31) is stopped by a needle seat (9) or a stopping part (181) of the lifting bearing platform (18), and an inserting part (121) for accommodating the sample injection needle (11) to be inserted is arranged at the bottom of the bottle pressing boot (12);
one end of the guide rod (7) is fixedly connected with the fixed frame (6), the other end of the guide rod is fixedly connected with the lifting bearing table (18), and the guide rod (7) penetrates through the needle seat (9) and is in sliding connection with the needle seat (9); the sample injection needle (11) is fixedly connected to the needle seat (9) through a sample injection needle block (10).
2. A needle protector according to claim 1, characterised in that the stop (31) is stopped by the needle seat (9).
3. The protection device for the sampling needle according to claim 1, wherein a large bottle pressing spring (5) is sleeved on the bottle pressing guide shaft (3), one end of the large bottle pressing spring (5) abuts against the guide rod seat (2), and the other end abuts against a limiting part (31) of the bottle pressing guide shaft (3).
4. The protection device for the sampling needle according to claim 1, wherein the guide rod (7) is sleeved with an adjusting spring (8), one end of the adjusting spring (8) abuts against the fixed frame (6), and the other end abuts against the needle seat (9).
5. The protection device of claim 1, further comprising a detection device, wherein the detection device comprises a detection portion and a detected portion, the detection portion is fixedly mounted on one of the needle seat (9) or the frame, the detected portion is fixedly mounted on the other of the needle seat (9) or the frame, and the detection portion and the detected portion are mutually matched to detect a displacement of the injection needle (11).
6. The needle protector as claimed in claim 5, wherein the detector is a correlation photoelectric switch or a displacement sensor.
7. A kind of injection needle protection device as claimed in claim 6, characterized in that, the detection portion is a correlation type photoelectric switch, the detection portion is a light coupling catch (16), the light coupling catch (16) is disposed on the needle seat (9), the correlation type photoelectric switch is fixedly disposed on the machine frame, the light coupling catch (16) corresponds to the position of the opening groove (4) of the correlation type photoelectric switch.
8. The sampling needle protection device according to claim 1, wherein the rack comprises a motor base (13) and a back plate (17), the driving device comprises a lead screw motor (1), a lead screw (101) and a lead screw slider (14), the lead screw motor (1) is arranged on the motor base (13), the lead screw (101) and the lead screw slider (14) form a lead screw transmission mechanism, the lead screw (101) is driven by the lead screw motor (1), one end of the lead screw slider (14) is fixedly connected with the lifting bearing table (18), and the other end of the lead screw slider (14) is slidably connected with the back plate (17) through a sliding rail (15).
9. The needle protector as claimed in claim 1, wherein the insertion portion (121) is a circular hole.
10. A needle protector according to any of claims 1-9, characterized by that the inner surface of the bottle-pressing shoe (12) is in the shape of a trumpet with a narrow upper part and a wide lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020738147.1U CN212111462U (en) | 2020-05-07 | 2020-05-07 | Sampling needle protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020738147.1U CN212111462U (en) | 2020-05-07 | 2020-05-07 | Sampling needle protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212111462U true CN212111462U (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020738147.1U Active CN212111462U (en) | 2020-05-07 | 2020-05-07 | Sampling needle protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN212111462U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828370A (en) * | 2021-09-23 | 2021-12-24 | 睿科集团(厦门)股份有限公司 | Secondary guide puncture needle device with bottle cap pressing function |
| CN115267032A (en) * | 2022-08-02 | 2022-11-01 | 青岛盛瀚色谱技术有限公司 | Automatic sample introduction device |
-
2020
- 2020-05-07 CN CN202020738147.1U patent/CN212111462U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828370A (en) * | 2021-09-23 | 2021-12-24 | 睿科集团(厦门)股份有限公司 | Secondary guide puncture needle device with bottle cap pressing function |
| CN115267032A (en) * | 2022-08-02 | 2022-11-01 | 青岛盛瀚色谱技术有限公司 | Automatic sample introduction device |
| CN115267032B (en) * | 2022-08-02 | 2024-06-04 | 青岛盛瀚色谱技术有限公司 | Automatic sample injection device |
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