Anti-collision sampling needle mechanism for flow injection

Abstract

The utility model relates to the technical field of flow injection analytical instruments, in particular to an anti-collision sampling needle mechanism for flow injection, which comprises a driving shaft for lifting and horizontally rotating, and a rear cantilever which synchronously lifts and horizontally rotates is connected onto the driving shaft. The free end of the rear cantilever is connected with the front cantilever, the front cantilever slides in the horizontal direction relative to the rear cantilever, and a transverse anti-collision monitoring assembly is arranged at the joint. The free end of the front cantilever is connected with a sampling needle module, the sampling needle module slides in the longitudinal direction relative to the front cantilever, and a longitudinal anti-collision monitoring assembly is arranged at the joint of the sampling needle module and the front cantilever. According to the utility model, the structures of the front cantilever and the rear cantilever are improved, and the movement of the sampling needle is monitored in real time under the combined action of the transverse anti-collision monitoring assembly and the longitudinal anti-collision monitoring assembly, so that the driving can be stopped in time to avoid the damage to the sampling needle when the needle collision condition occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of flow injection analyzers, and particularly relates to an anti-collision sampling needle mechanism for flow injection. Background Art

[0002] A flow injection analyzer is used to measure the concentration of a sample, and obtains and discharges a liquid sample through a sampling needle module. At present, the sampling needle module of a flow injection analyzer performs actions driven by a robotic arm. Most sampling needle modules do not have the function of anti-collision needles, and a few sampling needle modules have a single vertical anti-collision function. During the execution of actions, once a needle collision occurs due to human operation errors or instrument failures, the reagent needle is easily bent or damaged, resulting in the inability to perform tests normally, and both equipment manufacturers and users will suffer certain losses. In addition, the anti-collision structures provided in some sampling needle modules in the prior art are complex and the operation process is relatively cumbersome, resulting in high production costs and high failure rates.

[0003] It can be seen that there is still room for urgent improvement in the anti-collision solution of the sampling needle module of the current flow injection instrument, and it should be optimized to improve the structural stability and reliability, improve the safety of the sampling needle module during operation, and avoid damage to the sampling needle module caused by improper operation. Therefore, a more reasonable technical solution needs to be proposed to solve the technical problems existing in the prior art. Summary of the Utility Model

[0004] To at least overcome one of the defects mentioned above, the utility model proposes an anti-collision sampling needle mechanism for flow injection, which drives the sampling needle module to move in multiple dimensions to reach a specified position for action, and performs real-time monitoring in each dimension. When the sampling needle module exceeds the set activity area, the driving is stopped to avoid damage to the sampling needle module caused by collision.

[0005] To achieve the above technical effects, the anti-collision sampling needle mechanism disclosed by the utility model can adopt the following technical solutions:

[0006] An anti-collision sampling needle mechanism for flow injection, including a drive shaft for providing lifting and horizontal rotation, a rear cantilever connected to the drive shaft for synchronous lifting and horizontal rotation, a front cantilever connected to the free end of the rear cantilever and sliding horizontally relative to the rear cantilever, and a lateral anti-collision monitoring component is provided at the connection; the free end of the front cantilever is connected to the sampling needle module, the sampling needle module slides longitudinally relative to the front cantilever, and a longitudinal anti-collision monitoring component is provided at the connection between the sampling needle module and the front cantilever.

[0007] The above-disclosed anti-collision sampling needle mechanism, through structural adjustments in the horizontal and vertical directions, when adjusting the position of the sampling needle, if a needle collision occurs during horizontal deflection or vertical lifting, the lateral anti-collision monitoring component or the longitudinal anti-collision lifting component can quickly judge and generate a monitoring signal, so as to stop the action in time and avoid further damage to the sampling needle caused by the action, thereby improving the safety index of the sampling process.

[0008] Furthermore, in the present utility model, the cooperation structure of the rear cantilever and the front cantilever realizes the lateral movement margin and can be buffered to a certain extent during the process of lateral needle collision. The combined structure of the rear cantilever and the front cantilever can be constructed in various forms and is not uniquely limited. Here, an optimization is carried out and one feasible option is proposed: the rear cantilever and the front cantilever are cooperated through a lateral slide rail structure, and a horizontal elastic guiding component is further arranged between the rear cantilever and the front cantilever. The horizontal elastic guiding component limits the lateral sliding of the front cantilever relative to the rear cantilever, and the front cantilever and the rear cantilever are centered and aligned under normal conditions. When adopting such a scheme, the horizontal elastic guiding component is used to apply an elastic force between the front cantilever and the rear cantilever. When a horizontal needle collision occurs, the front cantilever stops moving under the external force, and the rear cantilever continues to move and deflects relative to the front cantilever. The horizontal elastic guiding component undergoes elastic deformation. After the external force on the front cantilever is removed, under the action of the elastic force of the horizontal elastic guiding component, the front cantilever and the rear cantilever are relatively reset.

[0009] Furthermore, the lateral slide rail structure can be set according to various schemes and is not uniquely limited. Here, an optimization is carried out and one feasible option is proposed: the lateral slide rail structure includes a slide rail arranged on the rear cantilever and a slide seat arranged on the front cantilever and cooperating with the slide rail. When adopting such a scheme, the slide rail can be arranged on the rear cantilever, and the slide seat can be arranged on the front cantilever.

[0010] Furthermore, in the present utility model, the horizontal elastic guiding component can be constructed in various schemes and is not uniquely limited. Here, an optimization is carried out and one feasible option is proposed: the horizontal elastic guiding component includes guiding seat plates arranged on both sides of the rear cantilever. Horizontal guiding rods cooperating with the front cantilever are arranged on the guiding seat plates, and horizontal elastic members are arranged on the horizontal guiding rods. One end of the horizontal elastic member abuts against the guiding seat plate, and the other end abuts against the front cantilever. When adopting such a scheme, the horizontal elastic member can adopt a spring.

[0011] Furthermore, in the present utility model, the free end of the front cantilever is used to cooperate with the sampling needle assembly. There are various specific solutions, and one feasible option is optimized and proposed here: a linear bearing is provided at the free end of the front cantilever, and the sampling needle cooperates with the linear bearing and moves longitudinally relative to the front cantilever. When adopting such a solution, the sampling needle moves up and down within the movable range of the linear bearing, and there is a certain amount of movement margin to avoid damaging the sampling needle when a longitudinal needle collision occurs.

[0012] Furthermore, in order to maintain the stability between the sampling needle and the linear bearing, an elastic pressing force is applied through a lifting elastic guiding component. A feasible solution is proposed here: a lifting elastic guiding component is provided between the front cantilever and the sampling needle, including a lifting guiding rod that cooperates with the sampling needle. A lifting elastic member is provided on the lifting guiding rod. One end of the lifting elastic member is fixedly cooperated with the lifting guiding rod, and the other end is fixedly cooperated with the sampling needle. When adopting such a solution, the lifting elastic member uses a spring.

[0013] Furthermore, in the present utility model, the lateral anti-collision detection component can adopt the following feasible solution: the lateral anti-collision detection component includes a horizontal photoelectric sensor and a horizontal optocoupler sensing piece. When the horizontal optocoupler sensing piece is located between the transmitting end and the receiving end of the horizontal photoelectric sensor, the sensing signal of the horizontal photoelectric sensor is blocked.

[0014] Furthermore, the specific setting method of the horizontal photoelectric sensor in the present utility model can be optimized, and one feasible option is proposed here: the transmitting end and the receiving end of the horizontal photoelectric sensor are arranged at intervals longitudinally, and the horizontal optocoupler sensing piece moves synchronously in the horizontal direction with the front cantilever.

[0015] Furthermore, the longitudinal anti-collision detection component can adopt the following feasible solution: the longitudinal anti-collision detection component includes a longitudinal photoelectric sensor and a longitudinal optocoupler sensing piece. When the longitudinal optocoupler sensing piece is located between the transmitting end and the receiving end of the longitudinal photoelectric sensor, the sensing signal of the horizontal photoelectric sensor is blocked.

[0016] Furthermore, the specific setting method of the longitudinal photoelectric sensor in the present utility model can be optimized, and a more feasible option is proposed here: the transmitting end and the receiving end of the longitudinal photoelectric sensor are arranged at intervals horizontally, and the longitudinal optocoupler sensing piece moves synchronously longitudinally with the sampling needle.

[0017] Compared with the prior art, some beneficial effects of the disclosed technical solution of the present utility model include:

[0018] The utility model improves the structures of the front cantilever and the rear cantilever, and through the combined action of the lateral anti-collision monitoring component and the longitudinal anti-collision monitoring component, the movement of the sampling needle is monitored in real time. When the needle collision occurs, the driving can be stopped in time to avoid damage to the sampling needle. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a structural schematic diagram of the anti-collision sampling needle mechanism.

[0021] Figure 2 It is a structural schematic diagram of another perspective of the anti-collision sampling needle mechanism.

[0022] In the above drawings, the meanings of each label are as follows:

[0023] 1. Driving shaft; 2. Rear cantilever; 3. Horizontal photoelectric sensor; 4. Horizontal optocoupler sensing sheet; 5. Guide seat plate; 6. Slide rail; 7. Slide block; 8. Front cantilever; 9. Longitudinal photoelectric sensor; 10. Longitudinal optocoupler sensing sheet; 11. Lifting elastic guiding component; 12. Linear bearing; 13. Sampling needle; 14. Horizontal elastic guiding component. Detailed Embodiments

[0024] The present utility model will be further explained below in conjunction with the drawings and specific embodiments.

[0025] In view of the many deficiencies in the prior art, the following embodiments are optimized to overcome the defects existing in the prior art.

[0026] Embodiment

[0027] As Figure 1 、 Figure 2 shown, this embodiment provides an anti-collision sampling needle 13 mechanism for flow injection, including a driving shaft 1 for providing lifting and horizontal rotation. The driving shaft 1 is connected with a rear cantilever 2 for synchronous lifting and horizontal rotation. The free end of the rear cantilever 2 is connected with a front cantilever 8, and the front cantilever 8 slides horizontally relative to the rear cantilever 2, and a lateral anti-collision monitoring component is arranged at the connection; the free end of the front cantilever 8 is connected with a sampling needle 13 module, the sampling needle 13 module slides longitudinally relative to the front cantilever 8, and a longitudinal anti-collision monitoring component is arranged at the connection between the sampling needle 13 module and the front cantilever 8.

[0028] The anti-collision sampling needle 13 mechanism disclosed in this embodiment adjusts its structure in the horizontal and vertical directions. When adjusting the position of the sampling needle 13, if a needle collision occurs during horizontal deflection or vertical lifting, the lateral anti-collision monitoring component or the longitudinal anti-collision lifting component can quickly judge and generate a monitoring signal, so as to stop the action in time and avoid further damage to the sampling needle 13 caused by further actions, thereby improving the safety index of the sampling process.

[0029] In this embodiment, the cooperation structure of the rear cantilever 2 and the front cantilever 8 realizes the lateral movement margin and can be buffered to a certain extent during the process of lateral needle collision. The combined structure of the rear cantilever 2 and the front cantilever 8 can be constructed in various forms and is not uniquely limited. This embodiment is optimized and one feasible option is adopted: the rear cantilever 2 and the front cantilever 8 are structurally cooperated through the lateral slide rail 6, and a horizontal elastic guiding component 14 is further arranged between the rear cantilever 2 and the front cantilever 8. The horizontal elastic guiding component 14 limits the lateral sliding of the front cantilever 8 relative to the rear cantilever 2, and the front cantilever 8 and the rear cantilever 2 are centered and aligned under normal conditions. When adopting such a scheme, the horizontal elastic guiding component 14 is used to apply an elastic force between the front cantilever 8 and the rear cantilever 2. When a horizontal needle collision occurs, the front cantilever 8 stops moving under the external force, and the cantilever continues to move and deflect relative to the front cantilever 8. The horizontal elastic guiding component 14 undergoes elastic deformation. After the external force on the front cantilever 8 is released, the front cantilever 8 and the rear cantilever 2 are relatively reset under the action of the elastic force of the horizontal elastic guiding component 14.

[0030] The structure of the lateral slide rail 6 can be set according to various schemes and is not uniquely limited. This embodiment is optimized and one feasible option is adopted: the structure of the lateral slide rail 6 includes a slide rail 6 arranged on the rear cantilever 2 and a slide seat 7 arranged on the front cantilever 8 and cooperating with the slide rail 6. When adopting such a scheme, the slide rail 6 can be arranged on the rear cantilever 2, and the slide seat 7 can be arranged on the front cantilever 8.

[0031] In this embodiment, the horizontal elastic guiding component 14 can be constructed in various schemes and is not uniquely limited. This embodiment is optimized and one feasible option is adopted: the horizontal elastic guiding component 14 includes guiding seat plates 5 arranged on both sides of the rear cantilever 2. Horizontal guiding rods cooperating with the front cantilever 8 are arranged on the guiding seat plates 5, and horizontal elastic members are arranged on the horizontal guiding rods. One end of the horizontal elastic member abuts against the guiding seat plate 5, and the other end abuts against the front cantilever 8. When adopting such a scheme, the horizontal elastic member can adopt a spring.

[0032] In this embodiment, the free end of the front cantilever 8 is used to cooperate with the sampling needle 13 assembly. There are many specific solutions. This embodiment is optimized and adopts one of the feasible options: the free end of the front cantilever 8 is provided with a linear bearing 12, and the sampling needle 13 cooperates with the linear bearing 12 and moves longitudinally relative to the front cantilever 8. When such a solution is adopted, the sampling needle 13 moves up and down within the range of motion of the linear bearing 12, and there is a certain margin of motion to avoid damaging the sampling needle 13 when a longitudinal needle collision occurs.

[0033] In order to maintain the stability of the sampling needle 13 and the linear bearing 12, an elastic pressing force is applied by the lifting elastic guide assembly 11. Here, the following feasible solution is proposed: a lifting elastic guide assembly 11 is provided between the front cantilever 8 and the sampling needle 13, including a lifting guide rod matched with the sampling needle 13, and a lifting elastic member is provided on the lifting guide rod, one end of the lifting elastic member is matched and fixed with the lifting guide rod, and the other end is matched and fixed with the sampling needle 13. When such a solution is adopted, the lifting elastic member adopts a spring.

[0034] In this embodiment, the lateral anti-collision detection component can adopt the following feasible solution: the lateral anti-collision detection component includes a horizontal photoelectric sensor 3 and a horizontal optical coupler sensor sheet 4. When the horizontal optical coupler sensor sheet 4 is located between the transmitting end and the receiving end of the horizontal photoelectric sensor 3, the sensing signal of the horizontal photoelectric sensor 3 is blocked.

[0035] In this embodiment, the specific setting method of the horizontal photoelectric sensor 3 can be optimized, and one feasible option is proposed here: the transmitting end and the receiving end of the horizontal photoelectric sensor 3 are arranged at intervals in the longitudinal direction, and the horizontal optical coupling sensor sheet 4 moves synchronously with the front cantilever 8 in the horizontal direction.

[0036] The longitudinal anti-collision detection component can adopt the following feasible solution: the longitudinal anti-collision detection component includes a longitudinal photoelectric sensor 9 and a longitudinal optical coupler sensing sheet 10. When the longitudinal optical coupler sensing sheet 10 is located between the transmitting end and the receiving end of the longitudinal photoelectric sensor 9, the sensing signal of the horizontal photoelectric sensor 3 is blocked.

[0037] In this embodiment, the specific arrangement of the longitudinal photoelectric sensor 9 can be optimized, and a more feasible option is proposed here: the transmitting end and the receiving end of the longitudinal photoelectric sensor 9 are arranged at intervals in the horizontal direction, and the longitudinal optical coupling sensor sheet 10 moves synchronously with the sampling needle 13 in the longitudinal direction.

[0038] The above are the implementation manners enumerated in this embodiment. However, this embodiment is not limited to the above optional implementation manners. Those skilled in the art can obtain many other implementation manners by arbitrarily combining the above manners. Anyone can obtain various other forms of implementation manners under the inspiration of this embodiment. The above specific implementation manners should not be construed as limiting the protection scope of this embodiment. The protection scope of this embodiment shall be defined by the claims.

Claims

1. An anti-collision sampling needle mechanism for flow injection, characterized in that: It includes a drive shaft (1) for providing lifting and horizontal rotation. A rear cantilever (2) for synchronous lifting and horizontal rotation is connected to the drive shaft (1). The free end of the rear cantilever (2) is connected to a front cantilever (8), and the front cantilever (8) slides horizontally relative to the rear cantilever (2), and a transverse anti-collision monitoring component is provided at the connection. The free end of the front cantilever (8) is connected to a sampling needle (13) module, and the sampling needle (13) module slides longitudinally relative to the front cantilever (8), and a longitudinal anti-collision monitoring component is provided at the connection between the sampling needle (13) module and the front cantilever (8).

2. The anti-collision sampling needle mechanism for flow injection according to claim 1, characterized in that: The rear cantilever (2) and the front cantilever (8) are structurally matched through a transverse slide rail (6) structure, and a horizontal elastic guiding component (14) is also provided between the rear cantilever (2) and the front cantilever (8). The horizontal elastic guiding component (14) defines the transverse sliding of the front cantilever (8) relative to the rear cantilever (2), and normally the front cantilever (8) and the rear cantilever (2) are centered and aligned.

3. The anti-collision sampling needle mechanism for flow injection according to claim 2, characterized in that: The transverse slide rail (6) structure includes a slide rail (6) provided on the rear cantilever (2) and a slide seat (7) provided on the front cantilever (8) and matched with the slide rail (6).

4. The anti-collision sampling needle mechanism for flow injection according to claim 2 or 3, characterized in that: The horizontal elastic guiding component (14) includes guiding seat plates (5) provided on both sides of the rear cantilever (2). Horizontal guiding rods matched with the front cantilever (8) are provided on the guiding seat plates (5), and horizontal elastic members are provided on the horizontal guiding rods. One end of the horizontal elastic member abuts against the guiding seat plate (5), and the other end abuts against the front cantilever (8).

5. The anti-collision sampling needle mechanism for flow injection according to claim 1, characterized in that: A linear bearing (12) is provided at the free end of the front cantilever (8), and the sampling needle (13) is matched with the linear bearing (12) and moves longitudinally relative to the front cantilever (8).

6. The anti-collision sampling needle mechanism for flow injection according to claim 5, characterized in that: A lifting elastic guiding component (11) is provided between the front cantilever (8) and the sampling needle (13), including a lifting guiding rod matched with the sampling needle (13). A lifting elastic member is provided on the lifting guiding rod. One section of the lifting elastic member is fixedly matched with the lifting guiding rod, and the other end is fixedly matched with the sampling needle (13).

7. The anti-collision sampling needle mechanism for flow injection according to claim 1, characterized in that: The transverse anti-collision detection component includes a horizontal photoelectric sensor (3) and a horizontal opto-coupler sensing sheet (4). When the horizontal opto-coupler sensing sheet (4) is located between the transmitting end and the receiving end of the horizontal photoelectric sensor (3), the sensing signal of the horizontal photoelectric sensor (3) is blocked.

8. The anti-collision sampling needle mechanism for flow injection according to claim 7, characterized in that: The transmitting end and the receiving end of the horizontal photoelectric sensor (3) are arranged at intervals longitudinally, and the horizontal opto-coupler sensing sheet (4) moves synchronously with the front cantilever (8) in the horizontal direction.

9. The anti-collision sampling needle mechanism for flow injection according to claim 1, wherein: The longitudinal anti-collision detection component includes a longitudinal photoelectric sensor (9) and a longitudinal opto-coupler sensing sheet (10). When the longitudinal opto-coupler sensing sheet (10) is located between the transmitting end and the receiving end of the longitudinal photoelectric sensor (9), the sensing signal of the horizontal photoelectric sensor (3) is blocked.

10. The anti-collision sampling needle mechanism for flow injection according to claim 9, characterized in that: The transmitting end and the receiving end of the longitudinal photoelectric sensor (9) are arranged at intervals horizontally, and the longitudinal opto-coupler sensing sheet (10) moves synchronously with the sampling needle (13) longitudinally.

Images