An analytical instrument with adjustable gas flow rate and gas resistance

Abstract

This utility model discloses an adjustable gas flow control for analytical instruments, comprising a tube body with a flow channel inside. The flow channel contains a gas flow control valve core, a guide ring for the valve core, and gas passage protrusions. The upper part of the valve core is inserted into the guide ring, forming an insertion cavity between the gas passage protrusions. The lower part of the valve core is inserted into the insertion cavity, and the valve core has multiple sample flow channels. When the valve core is in its lower position, the lower part and the insertion cavity are completely closed, achieving gas passage closure. As the valve core moves upward from its lower position, the lower part and the insertion cavity gradually separate to form gas passages, which are interconnected with the sample flow channels. The gas passages enlarge with increasing upward movement. Its advantage lies in effectively solving the problem of non-adjustable gas flow in existing fixed gas flow control systems, allowing the gas flow control to be adjusted to meet different gas flow requirements, thus improving the versatility and stability of gas flow control systems for analytical instruments.

Description

Technical Field

[0001] This utility model relates to the field of analytical instruments, and in particular to an adjustable gas resistance for analytical instruments. Background Technology

[0002] In the field of analytical instruments, gas resistance, as a key component for controlling gas flow, is widely used in various gas analysis devices, and its performance directly affects the accuracy and stability of analytical results. Currently, the gas resistances used in analytical instruments are all of fixed structure, and their core function is to control the flow rate of gas through a pre-set gas passage. Existing fixed gas resistances typically consist of a gas resistance tube body, within which a channel for gas flow is set. This channel has gas passages of a specific size machined within it, and the size of the opening in the gas passage directly determines the gas throughput, making it the core structure for achieving gas flow control.

[0003] However, existing fixed gas resistance systems have numerous technical defects in practical applications, severely restricting the versatility and reliability of analytical instruments. Specifically, due to differences in processing techniques, equipment precision, and quality control standards among different manufacturers, fixed gas resistance systems of the same specifications often exhibit significant deviations in gas passage dimensions. Even within the same manufacturer, different production batches can experience substantial fluctuations in gas passage dimensions due to factors such as changing drilling bits, equipment wear, or operational errors. This inconsistency in processing precision directly results in significant differences in the actual gas flow rate of gas resistance systems of the same specifications. This makes it difficult to maintain stable gas flow rates in different devices or even within the same device after changing gas resistance systems, thus affecting the measurement accuracy of analytical instruments.

[0004] More importantly, the dimensions of existing fixed-resistance gas channels cannot be adjusted once manufactured, resulting in extremely poor adaptability. On the one hand, when analytical instruments need to be adapted to different models of equipment or different gas analysis scenarios, fixed-resistance instruments cannot meet diverse gas volume requirements by adjusting the channel size; adaptation can only be achieved by replacing the gas resistor with a different specification. This not only increases production costs and inventory pressure but also reduces equipment maintenance efficiency. On the other hand, in actual use, analytical instruments often need to cope with different operating conditions (such as gas pressure fluctuations, composition changes, etc.). If the gas channel size of the gas resistor can be adjusted in real time, the stability of gas flow can be effectively guaranteed. However, fixed-resistance instruments obviously cannot achieve this function, thus limiting the application range of analytical instruments in complex operating conditions.

[0005] Therefore, developing an adjustable air resistance structure that can flexibly adjust the air passage size and ensure consistent airflow has become a key requirement for overcoming the shortcomings of existing technologies and improving the performance of analytical instruments. This adjustable air resistance can not only compensate for manufacturing errors through calibration adjustments to achieve uniform airflow across different devices, but also adapt to flow requirements under different operating conditions, significantly enhancing the versatility and reliability of analytical instruments. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an adjustable gas resistance for analytical instruments, which can adjust the size of the gas passage to suit different working conditions and enhance the versatility and reliability of analytical instruments.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an adjustable gas flow rate gas resistor for analytical instruments, comprising a tube body, wherein a flow channel is provided in the tube body, characterized in that a gas resistance valve core, a gas resistance valve core guide ring, and gas passage protrusions are provided in the flow channel, the upper body of the gas resistance valve core is inserted into the gas resistance valve core guide ring, an insertion cavity is formed between the gas passage protrusions, the lower body of the gas resistance valve core is inserted into the insertion cavity, and multiple sample flow channels are provided on the gas resistance valve core; when the gas resistance valve core is in the lower position, the lower body and the insertion cavity are completely engaged, thereby closing the gas passages; when the gas resistance valve core moves upward from the lower end, the lower body and the insertion cavity gradually form gas passages, the gas passages and sample flow channels are interconnected, and the gas passages become larger as the upward movement increases.

[0008] A further preferred embodiment of this utility model is that the upper body of the air resistance valve core and the air resistance valve core guide ring are connected by a threaded structure, and the air resistance valve core can be moved up and down by rotating the air resistance valve core.

[0009] A further preferred embodiment of this utility model is: an adjustment hole is provided at the top of the air resistance valve core, and a screwdriver is inserted into the adjustment hole to realize the rotation of the air resistance valve core.

[0010] A further preferred embodiment of this utility model is as follows: an elastic packing and a disc spring are provided between the guide ring of the air resistance valve core and the air passage protrusion. The disc spring compresses the elastic packing, causing the elastic packing to apply pressure to the upper body of the air resistance valve core.

[0011] A further preferred embodiment of this utility model is that the elastic filler is a ring-shaped graphite filler.

[0012] A further preferred embodiment of this utility model is that the diameter of the upper body of the air resistance valve core is larger than the diameter of the lower body of the air resistance valve core.

[0013] A further preferred embodiment of this utility model is as follows: the lower main body of the air resistance valve core is located at the center of the lower surface of the upper main body, the upper main body is cylindrical, and the lower main body is triangular pyramidal.

[0014] A further preferred embodiment of this utility model is: the lower surface of the upper main body is an inclined surface that gradually bulges towards the center, and the insertion cavity formed between the airway protrusions is triangular and pyramidal.

[0015] A further preferred embodiment of this utility model is that the inclined surface and the protruding surface of the air passage form a channel gap during the process of the air resistance valve core moving upward from the lower end, and the air passage and the sample flow passage are connected through the channel gap.

[0016] A further preferred embodiment of this utility model is that the sample flow channel is arranged vertically.

[0017] This invention, by incorporating a gas resistance valve core, a guide ring for the gas resistance valve core, and a gas passage protrusion within the flow channel, utilizes the engagement and relative movement of the lower body of the gas resistance valve core with the insertion cavity to form a variable gas passage. This, combined with the sample flow passage, enables flexible adjustment of the gas flow rate within the gas resistance. When the gas resistance valve core is in the lower position, the gas passage is completely closed. As it moves upward, the gas passage widens with the increase in the range of motion, effectively solving the problem of the non-adjustable gas flow rate in existing fixed gas resistance systems. This allows the gas resistance to be adjusted to meet different gas flow requirements, improving the versatility and stability of gas resistance systems used in analytical instruments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model when it is closed;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model when it is moved upwards and opened;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a traditional technical solution. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-4As shown, an adjustable gas flow control for an analytical instrument includes a tube body 1, a flow channel 2 inside the tube body 1, a gas flow control valve core 3, a gas flow control valve core guide ring 4, and gas passage protrusions 5 inside the flow channel 2. The upper body 6 of the gas flow control valve core 3 is inserted into the gas flow control valve core guide ring 4, and an insertion cavity is formed between the gas passage protrusions 5. The lower body 8 of the gas flow control valve core 3 is inserted into the insertion cavity. Multiple sample flow channels 9 are provided on the gas flow control valve core 3. When the gas flow control valve core 3 is in the lower position, the lower body 8 and the insertion cavity are completely engaged, thereby closing the gas passages 10. When the gas flow control valve core 3 moves upward from the lower end, the lower body 8 and the insertion cavity gradually separate to form the gas passages 10. The gas passages 10 and the sample flow channels 9 are interconnected, and the gas passages 10 become larger as the upward movement increases. By installing a gas resistance valve core 3, a gas resistance valve core guide ring 4, and a gas passage protrusion 5 within the flow channel 2, a variable gas passage 10 is formed by the engagement and relative movement of the lower body 8 of the gas resistance valve core 3 with the insertion cavity. This, combined with the sample flow passage 9, enables flexible adjustment of the gas flow rate within the gas resistance. When the gas resistance valve core 3 is in the lower position, the gas passage 10 is completely closed. As the valve moves upward, the gas passage 10 expands with the increase in the range of motion, effectively solving the problem of the non-adjustable gas flow rate of existing fixed gas resistances. This allows the gas resistance to be adjusted to meet different gas flow requirements, improving the versatility and stability of gas resistances used in analytical instruments.

[0024] The upper body 6 of the air resistance valve core 3 and the air resistance valve core guide ring 4 are connected by a threaded structure 11, allowing the air resistance valve core 3 to move up and down by rotating it. This threaded connection between the upper body 6 and the guide ring 4, allowing for more precise and controllable adjustment of the air resistance valve core 3, enables fine displacement adjustments, thus accurately changing the size of the air passage 10 and further improving the accuracy of gas flow regulation. Compared to existing fixed air passage designs with fixed air resistance, this better meets the precise gas flow control requirements of analytical instruments, while also facilitating convenient and stable adjustments by operators based on actual conditions.

[0025] An adjustment hole 12 is provided at the top of the air resistance valve core 3. A screwdriver is inserted into the adjustment hole 12 to rotate the air resistance valve core 3. The adjustment hole 12 at the top of the air resistance valve core 3 simplifies the air resistance adjustment operation by allowing the operator to easily adjust the air volume without complicated tools, improving the convenience and efficiency of adjustment. Especially during experimental calibration or on-site maintenance, it enables rapid rotation adjustment of the air resistance valve core 3, ensuring rapid adaptation and stable operation of the air resistance in different scenarios.

[0026] An elastic packing 13 and a disc spring 14 are disposed between the guide ring 4 and the air passage protrusion 5 of the airlock valve core. The disc spring 14 compresses the elastic packing 13, causing the elastic packing 13 to apply pressure to the upper body 6 of the airlock valve core 3. This arrangement of the elastic packing 13 and disc spring 14 between the guide ring 4 and the air passage protrusion 5, and the disc spring 14 compressing the elastic packing 13 to apply pressure to the upper body 6 of the airlock valve core 3, provides stable damping for the airlock valve core 3. This structure ensures that the airlock valve core 3 can be stably maintained in the set position after adjustment, avoiding air volume fluctuations caused by valve core displacement due to vibration, airflow impact, etc., effectively ensuring the stability of the airlock operation and solving the problem of easy position changes after adjustment.

[0027] The elastic packing 13 is an annular graphite packing. The annular graphite packing provides excellent sealing and wear resistance, and effectively deforms under pressure to tightly fit the gas-resistance valve core 3. The annular structure allows for uniform pressure application to the gas-resistance valve core 3, ensuring a tight seal, preventing gas leakage, and providing suitable damping force. Furthermore, the high-temperature resistance and corrosion resistance of graphite material are suitable for the working environment of analytical instruments, extending the service life of the gas-resistance valve.

[0028] The diameter of the upper body 6 of the airlock valve core 3 is larger than the diameter of the lower body 8. This design allows the upper body 6 to stably engage with the airlock valve core guide ring 4, providing reliable guidance and support for the valve core's vertical movement. The lower body 8, on the other hand, can be flexibly inserted into the insertion cavity to adjust the size of the air passage 10. This dimensional distinction between the upper and lower parts optimizes the valve core's structural rationality, ensures smooth adjustment and structural stability, and improves the overall mechanical performance of the airlock valve.

[0029] The lower body 8 of the air-resistance valve core 3 is located at the center of the lower surface of the upper body 6. The upper body 6 is cylindrical, and the lower body 8 is triangular pyramidal. Positioning the lower body 8 of the air-resistance valve core 3 at the center of the lower surface of the upper body 6, with the upper part being cylindrical and the lower part triangular pyramidal, facilitates threaded engagement with the guide ring and stable movement. When inserted into the insertion cavity, the side of the triangular pyramidal part forms a gradually changing air passage 10 with the insertion cavity. This shape design makes the size of the air passage 10 change more uniformly and linearly with the movement of the valve core, improving the accuracy of air volume regulation. Simultaneously, the centrally located lower body 8 ensures the symmetrical distribution of the air passage 10, making the airflow more stable.

[0030] The lower surface of the upper main body 6 is an inclined surface 18 that gradually bulges towards the center, forming an insertion cavity in the shape of a triangular pyramid between the air passage protrusions 5. By designing the lower surface of the upper main body 6 as an inclined surface 18 that gradually bulges towards the center, and the insertion cavity being triangular pyramidal, the inclined surface 18 and the triangular pyramidal insertion cavity work together. When the air resistance valve core 3 moves up and down, the channel gap 20 formed between them changes more regularly. This structure makes the adjustment of the air passage 10 more regular, allowing operators to accurately predict changes in air volume based on the adjustment range, improving the controllability of air volume adjustment, and also enhancing the compactness and rationality of the air resistance structure.

[0031] The inclined surface 18 and the surface of the air passage protrusion 5 form a channel gap 20 as the air resistance valve core 3 moves upward from the lower end. The air passage 10 and the sample flow passage 9 are connected through the channel gap 20. Clearly defining the gas flow path, the channel gap 20 formed by the inclined surface 18 and the air passage protrusion 5 during the upward movement of the air resistance valve core 3, and the connection between the air passage 10 and the sample flow passage 9 through this gap, ensures smooth gas flow from the sample flow passage 9 through the channel gap 20 to the air passage 10. Simultaneously, the change in the channel gap 20 with the movement of the valve core directly determines the gas volume, making the principle of gas volume regulation clearer, the structure easier to understand and manufacture, and ensuring the stable implementation of the air resistance function.

[0032] The sample flow channel 9 is vertically oriented. This vertical orientation facilitates smooth gas flow within the gas resistance valve core 3, reducing gas flow resistance and turbulence. This design allows gas to enter the channel gap 20 and the air passage 10 more directly, reducing airflow loss and ensuring accurate gas measurement. Furthermore, the vertical structure facilitates machining on the gas resistance valve core 3, simplifying the manufacturing process and improving production efficiency.

[0033] The above provides a detailed description of the adjustable gas resistance for analytical instruments provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A gas resistance with adjustable gas amount for analyzing an instrument, comprising a pipe body, a flow passage is arranged in the pipe body, characterized in that The flow channel is provided with a gas-resistance valve core, a gas-resistance valve core guide ring, and air passage protrusions. The upper body of the gas-resistance valve core is inserted into the gas-resistance valve core guide ring, and an insertion cavity is formed between the air passage protrusions. The lower body of the gas-resistance valve core is inserted into the insertion cavity. Multiple sample flow channels are provided on the gas-resistance valve core. When the gas-resistance valve core is in the lower position, the lower body and the insertion cavity are completely engaged, thereby closing the air passages. When the gas-resistance valve core moves upward from the lower end, the lower body and the insertion cavity gradually separate to form air passages. The air passages and sample flow channels are interconnected, and the air passages become larger as the upward movement increases.

2. The adjustable gas resistance for analytical instruments according to claim 1, characterized in that... The upper body of the air resistance valve core and the air resistance valve core guide ring are connected by a threaded structure, and the air resistance valve core can be moved up and down by rotating the air resistance valve core.

3. The gas resistance of an analytical instrument with adjustable gas flow rate according to claim 2, characterized in that... The top of the air resistance valve core is provided with an adjustment hole, and a screwdriver is inserted into the adjustment hole to rotate the air resistance valve core.

4. The adjustable gas flow rate gas resistance for an analytical instrument according to claim 1, characterized in that... An elastic packing and a disc spring are provided between the guide ring of the air resistance valve core and the air passage protrusion. The disc spring compresses the elastic packing, causing the elastic packing to apply pressure to the upper body of the air resistance valve core.

5. The adjustable gas resistance for analytical instruments according to claim 1, characterized in that... The elastic packing material is a ring-shaped graphite packing material.

6. The adjustable gas resistance for analytical instruments according to claim 1, characterized in that... The diameter of the upper body of the air resistance valve core is larger than the diameter of the lower body of the air resistance valve core.

7. The adjustable gas resistance for analytical instruments according to claim 6, characterized in that... The lower body of the air resistance valve core is located at the center of the lower surface of the upper body. The upper body is cylindrical and the lower body is triangular pyramidal.

8. The adjustable gas flow rate gas resistance for an analytical instrument according to claim 7, characterized in that... The lower surface of the upper main body is an inclined surface that gradually bulges towards the center, and the insertion cavity formed between the airway protrusions is triangular and pyramidal.

9. The adjustable gas resistance for analytical instruments according to claim 8, characterized in that... The inclined surface and the protruding surface of the air passage form a channel gap during the process of the air resistance valve core moving upward from the lower end, and the air passage and the sample flow passage are connected through the channel gap.

10. The adjustable gas resistance for analytical instruments according to claim 1, characterized in that... The sample flow channel is arranged vertically.

Images