Automatic gas sample injector

Abstract

The utility model belongs to the technical field of gas sample injection, and particularly relates to an automatic gas sample injector which comprises a base, a controller and an electric push rod are installed on the base, a cylinder body is placed on the base, the top end of the electric push rod is connected with a connecting frame, the connecting frame is connected with the top end of a piston, and the piston is in interference fit with the cylinder body. And the piston is provided with an air pipe joint and is in threaded connection with an exhaust plug. The piston is driven by the electric push rod to move at a constant speed in the cylinder body filled with water, and the gas in the ball bladder or the sampling bag is forced to be output to a detector at a constant flow speed by utilizing the incompressibility of water, so that the automation of the sampling process and the accurate control of the flow speed are realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gas sampling, and particularly relates to an automatic gas sampler. BACKGROUND

[0002] In the field of gas analysis, sample collection and sampling are key steps in the analysis process, directly related to the accuracy and reliability of the analysis results. Traditional gas sampling methods often use a ball bladder or aluminum foil bag as a sample container. These containers are widely used due to their portability, ease of carrying, and good sealing properties. However, in the sampling process, these traditional methods face many challenges.

[0003] First, the manual squeezing of the ball bladder or aluminum foil bag for sampling has the problem of unstable flow rate control. Due to differences in the strength of the operator's hand, squeezing speed, and other factors, it is difficult to maintain a consistent gas flow rate during the sampling process, which can adversely affect subsequent gas analysis and reduce the accuracy and repeatability of the analysis results. Especially in scenarios requiring high-precision analysis, such as environmental monitoring and food safety testing, unstable flow rates can lead to deviations in critical data, affecting the accuracy of decision-making.

[0004] Second, the manual sampling method is also tedious and inefficient. The operator needs to repeatedly squeeze the sample bag, which not only increases labor intensity but also increases the risk of operational errors due to fatigue. In addition, manual sampling also limits the degree of automation of the analysis process, which is not conducive to improving analysis efficiency and reducing human error. SUMMARY

[0005] To address the above problems, the utility model aims to provide an automatic gas sampler that solves the problem of traditional sampling methods using a ball bladder or aluminum foil bag as a sample container, which requires manual squeezing of the sample bag during sampling, making the operation tedious and difficult to ensure the stability of the sampling speed, thereby affecting the accuracy of the analysis results.

[0006] To achieve the above purpose, the utility model employs the technical solution of an automatic gas sampler, which includes a base, a controller and an electric push rod mounted on the base, a cylinder placed on the base, a connecting frame connected to the top end of the electric push rod, a piston connected to the top end of the connecting frame, the piston and the cylinder being in interference fit, a gas pipe joint mounted on the piston and a threaded exhaust plug.

[0007] The utility model has the beneficial effects of: the electric push rod drives the piston to move uniformly in the cylinder filled with water, and the incompressibility of water forces the gas in the ball bladder or sample bag to be output to the detector at a constant flow rate, achieving automation of the sampling process and precise control of the flow rate.

[0008] To ensure the stable cooperation of the cylinder and the piston;

[0009] As a further improvement of the above technical solution: the top surface of the base is provided with a circular groove structure suitable for installing the cylinder, and the axis of the circular groove is collinear with the axis of the piston.

[0010] The improvement has the beneficial effect that the groove on the base can position and support the cylinder, ensuring the stable cooperation of the piston and the cylinder.

[0011] To ensure the sealing of the piston;

[0012] As a further improvement of the above technical solution: the piston comprises a support plate and a rubber sealing ring, and the curved surface of the support plate is provided with an annular groove for embedding the rubber sealing ring.

[0013] The improvement has the beneficial effect that the rubber sealing ring is stably matched with the cylinder under the support of the support plate, sealing the water below.

[0014] To stably connect the air pipe;

[0015] As a further improvement of the above technical solution: the support plate is provided with a through hole for screwing an air pipe joint, and the air pipe joint is composed of two oppositely arranged pagoda joints.

[0016] The improvement has the beneficial effect that the pagoda joint can stably connect the air pipe, ensuring the stable output of the gas in the ball or the sampling bag to the outside.

[0017] To effectively exhaust the gas in the cylinder and ensure the uniformity of the gas supply flow;

[0018] As a further improvement of the above technical solution: the support plate is provided with a through hole for screwing an exhaust plug.

[0019] The improvement has the beneficial effect that after the exhaust plug is unscrewed, the gas in the cylinder can be exhausted through the through hole, and then the exhaust plug is screwed on to ensure that the gas in the cavity between the piston and the cylinder is effectively exhausted.

[0020] To ensure the sealing of the connection between the exhaust plug and the cylinder;

[0021] As a further improvement of the above technical solution: a sealing gasket is clamped between the exhaust plug and the support plate.

[0022] The improvement has the beneficial effect that the sealing gasket plays a sealing role, effectively ensuring the sealing of the connection between the exhaust plug and the cylinder.

[0023] To stably move the piston up and down;

[0024] As a further improvement of the above technical solution: the number of the electric push rods is two, and the two electric push rods are oppositely arranged on the two sides of the piston.

[0025] The beneficial effect of the improvement is that the two groups of symmetrically arranged electric push rods can drive the piston to stably move up and down.

[0026] The parts not involved in the device are the same as the prior art or can be realized by using the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The sectional structure of the utility model Figure One ;

[0028] Figure 2 The sectional structure of the utility model Figure Two ;

[0029] Figure 3 The structural schematic diagram based on the utility model Figure 1 ;

[0030] In the figure: 1, base; 2, cylinder body; 3, controller; 4, electric push rod; 5, connecting frame; 6, piston; 61, support plate; 62, rubber sealing ring; 7, air pipe joint; 8, exhaust plug; 81, sealing gasket. DETAILED DESCRIPTION

[0031] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be described in detail below in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0032] Example 1:

[0033] As Figure 1--3 shown: a gas automatic sampler, including the base 1, the base 1 is installed with controller 3 and electric push rod 4, the base 1 is placed with cylinder body 2, the top end of electric push rod 4 is connected with connecting frame 5, connecting frame 5 connects the top end of piston 6, piston 6 is interference fit with cylinder body 2, piston 6 is installed with gas pipe joint 7 and is screwed with exhaust plug 8, piston 6 is driven by electric push rod 4 to move at constant speed in cylinder body 2 full of water, the incompressibility of water forces the gas in the ball bladder or sampling bag to output to the detector at a constant flow rate, realizes the automation of the sampling process and the accurate control of the flow rate, the top surface of the base 1 is provided with a circular groove structure matched with the installation of the cylinder body 2, and the axis of the circular groove is collinear with the axis of the piston 6, the cylinder body 2 can be positioned and supported by the groove opened on the base 1, to ensure that the piston 6 and the cylinder body 2 maintain stable cooperation, the piston 6 includes support plate 61 and rubber sealing ring 62, the curved side surface of support plate 61 is provided with an annular groove for embedding rubber sealing ring 62, rubber sealing ring 62 is stably matched with cylinder body 2 under the support of support plate 61, sealing the water body below, the support plate 61 is provided with a through hole for screwing gas pipe joint 7, the gas pipe joint 7 is composed of two oppositely arranged pagoda joints, the pagoda joint can stably connect the gas pipe, to ensure the stable output of the gas in the ball bladder or sampling bag, the support plate 61 is provided with a through hole for screwing exhaust plug 8, after the exhaust plug 8 is unscrewed, the gas in the cylinder body 2 can be discharged through the through hole, and then the exhaust plug 8 is screwed to ensure that the gas in the cavity between the piston 6 and the cylinder body 2 is effectively discharged, the exhaust plug 8 and the support plate 61 are clamped with sealing gasket 81, which plays a sealing role, effectively ensuring the sealing of the connection between the exhaust plug 8 and the cylinder body 2, the number of electric push rod 4 is two, and they are installed on the left and right sides of piston 6, the two groups of symmetrically arranged electric push rods 4 can drive piston 6 to move up and down stably.

[0034] The working principle of the technical solution is that when the electric push rod 4 is extended to the maximum stroke, the piston 6 is integrally raised to the outside of the cylinder body 2, the operator takes the cylinder body 2 off the base 1, then connects the gas outlet / valve of the sample bag or the sample bag through a hose to one end of the gas pipe joint 7, then connects the other end of the gas pipe joint 7 to the gas inlet of the detector through a hose, then puts the sample bag into the inside of the cylinder body 2 and arranges the hose to be regular on the inside of the cylinder body 2, then puts the cylinder body 2 back on the base 1, then pours water into the inside of the cylinder body 2 so that the water is close to the height of the top end of the cylinder body 2, then unscrews the exhaust plug 8, controls the electric push rod 4 to uniformly contract to drive the piston 6 to slowly move downward, the piston 6 is inserted into the inside of the cylinder body 2, the rubber sealing ring 62 is extruded by the inner wall of the cylinder body 2 to have an interference fit with the cylinder body 2, a small amount of air in the cylinder body 2 is pushed out by water through the through hole on the support plate 61 for installing the exhaust plug 8, after the air is discharged, the electric push rod 4 is controlled to stop contracting, the exhaust plug 8 is screwed on the support plate 61 again, and then the electric push rod 4 is controlled to continue to uniformly and slowly contract to sample.

[0035] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] The principles and embodiments of the present application are described in this document, and the above examples are only used to help understand the method and core idea of the present application. The above description is only the preferred embodiment of the present application. It should be noted that due to the limited expression of language, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, and the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the application of the inventive concept and technical solution to other fields without improvement, should be regarded as the protection scope of the present application.

Claims

1. A gas autosampler characterized by: The utility model provides a kind of air compressor, including base (1), controller (3) and electric push rod (4) are installed on the base (1), cylinder (2) is placed on the base (1), the top of electric push rod (4) is connected with connecting frame (5), the top of connecting frame (5) is connected with piston (6), piston (6) is interference fit with cylinder (2), air pipe joint (7) is installed on piston (6) and is threadedly connected with exhaust plug (8).

2. The automatic gas sampler according to claim 1, characterized in that: The top surface of the base (1) is provided with a circular recess structure suitable for installing the cylinder (2), and the axis of the circular recess is collinear with the axis of the piston (6).

3. The automatic gas sampler of claim 1, wherein: The piston (6) includes a support plate (61) and a rubber sealing ring (62), and the curved surface side of the support plate (61) is provided with an annular groove for embedding the rubber sealing ring (62).

4. The automatic gas sampler of claim 3, wherein: The support plate (61) is provided with a through hole for threadedly connecting the air pipe joint (7), and the air pipe joint (7) is composed of two oppositely arranged tower joints.

5. The automatic gas sampler of claim 3 wherein: The support plate (61) is provided with a through hole for threadedly connecting the exhaust plug (8).

6. The automatic gas sampler of claim 1, wherein: A sealing gasket (81) is clamped between the exhaust plug (8) and the support plate (61).

7. The automatic gas sampler of claim 1 wherein: The number of electric push rods (4) is two, and they are installed on the left and right sides of the piston (6).

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