Nitrogen zero correction device

Abstract

The utility model discloses a nitrogen zero correction device which comprises a base plate, a containing groove is formed in the surface of one end of the base plate, a nitrogen cylinder is arranged in the containing groove, a flow control valve and a mixing tank are fixedly installed on the upper surface of the base plate, and the nitrogen cylinder, the flow control valve and the mixing tank are sequentially communicated and connected through connecting pipes. The outer wall of one side of the mixing tank is communicated and connected with one end of a gas conveying pipe, the other end of the gas conveying pipe is communicated and connected with a gas supply connector, the nitrogen flow is accurately controlled through the flow control valve, the pressure is accurately adjusted through the pressure adjusting valve, it is comprehensively guaranteed that the state of nitrogen entering a detection instrument is stable, and the accuracy of zero correction is improved. The nitrogen cylinder fixing mechanism stably fixes the nitrogen cylinder, so that the nitrogen cylinder is effectively prevented from shaking, loosening of the connecting pipe and gas leakage are avoided, safe and stable operation of the device is ensured, and a reliable zero correction environment is provided for a detection instrument.

Description

Technical Field

[0001] This utility model relates to the field of gas detection, and more specifically, to a nitrogen zero-point calibration device. Background Technology

[0002] Existing nitrogen zero-point calibration devices for gas detectors suffer from numerous problems affecting calibration accuracy and device stability. Most devices cannot precisely control the nitrogen flow rate, leading to instability in the amount of nitrogen entering the instrument and impacting calibration accuracy. Furthermore, the simple fixing method for nitrogen cylinders makes them prone to shaking and displacement during device operation, potentially causing safety hazards such as loose connecting pipes and gas leaks, severely affecting the normal operation and safety of the device.

[0003] How to invent a nitrogen zero-point calibration device to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a nitrogen zero-point calibration device, which aims to improve the existing nitrogen zero-point calibration devices, most of which cannot accurately control the nitrogen flow rate, affecting the calibration accuracy. At the same time, the nitrogen cylinder fixing method is simple, which may cause shaking, displacement, or even loosening of connecting pipes and gas leakage during device operation.

[0005] This utility model is implemented as follows: A nitrogen zero-point calibration device includes a base plate. A receiving groove is formed on one end surface of the base plate, and a nitrogen cylinder is disposed in the receiving groove. A flow control valve and a mixing tank are fixedly installed on the upper surface of the base plate. The nitrogen cylinder, the flow control valve and the mixing tank are connected in sequence through a connecting pipe. One end of a gas supply pipe is connected to the outer wall of one side of the mixing tank, and the other end of the gas supply pipe is connected to a gas supply connector.

[0006] In a preferred embodiment of this utility model, a pressure regulating valve is connected between one end of the gas pipeline and the gas supply connector, and the pressure regulating valve is fixedly installed on the surface of the substrate.

[0007] In a preferred embodiment of this invention, a pressure sensor is installed inside the mixing tank.

[0008] In a preferred embodiment of this utility model, a drive motor is fixedly installed on one end surface of the mixing tank, and one end of the output shaft of the drive motor extends into the interior of the mixing tank through a through hole and is fixedly connected to one end of the stirring rod. Several sets of stirring blades are arranged in a ring evenly distributed on the outer wall of the stirring rod.

[0009] In a preferred embodiment of this utility model, a nitrogen cylinder fixing mechanism is provided at one end of the bottom surface of the substrate near the receiving groove. The nitrogen cylinder fixing mechanism includes a mounting plate and two arc-shaped clamps. The two arc-shaped clamps are opposite to each other and coaxially arranged with the receiving groove. One end of each arc-shaped clamp is slidably installed in a corresponding transverse slide groove. The two transverse slide grooves are respectively opened through both sides of the top of one side surface of the mounting plate. A connecting protrusion is integrally provided on the other side surface of the mounting plate. One end of each arc-shaped clamp located in the transverse slide groove is integrally provided with a connecting part passing through the transverse slide groove. One end of a first spring is fixedly connected to the side surface of each connecting part facing the connecting protrusion. The other ends of the two first springs are respectively fixedly connected to the two sides surface of the connecting protrusion.

[0010] In a preferred embodiment of this utility model, an auxiliary bracket is coaxially arranged below the two arc-shaped clamps. One end of the auxiliary bracket is slidably installed in a vertical groove and is also integrally provided with a connecting part. A second spring is fixedly connected between the upper surface of the connecting part and the bottom surface of the connecting protrusion.

[0011] In a preferred embodiment of this utility model, protective anti-slip pads are provided on the inner walls of the two arc-shaped clamps on opposite sides.

[0012] The beneficial effects of this utility model are as follows: The nitrogen zero-point calibration device obtained through the above design ensures stable nitrogen flow through a flow control valve and precise pressure regulation through a pressure regulating valve, thereby improving the accuracy of zero-point calibration. The nitrogen cylinder fixing mechanism securely holds the nitrogen cylinder, effectively preventing cylinder shaking, loosening of connecting pipes, and gas leakage, ensuring safe and stable operation of the device and providing a reliable zero-point calibration environment for the testing instrument. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic perspective view of the overall structure provided by the embodiment of this utility model;

[0015] Figure 2 A perspective view of the overall structure on another side, provided for an embodiment of this utility model;

[0016] Figure 3A three-dimensional schematic cross-sectional view of the mixing tank provided for an embodiment of this utility model;

[0017] Figure 4 A three-dimensional schematic diagram of the overall structure of the nitrogen cylinder fixing mechanism provided for an embodiment of this utility model.

[0018] In the diagram: 1-Base plate; 2-Nitrogen cylinder; 3-Flow control valve; 4-Mixing tank; 5-Connecting pipe; 6-Gas supply pipe; 7-Gas supply connector; 8-Pressure regulating valve; 101-Mounting plate; 102-Arc-shaped clamp; 103-Horizontal slide groove; 104-Connecting protrusion; 105-First spring; 106-Auxiliary bracket; 107-Vertical slide groove; 108-Second spring; 401-Drive motor; 402-Stirring rod; 403-Stirring blade. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1 to 4 This utility model provides a technical solution: a nitrogen zero-point calibration device, including a base plate 1, a receiving groove is formed on one end surface of the base plate 1, a nitrogen cylinder 2 is disposed in the receiving groove, a flow control valve 3 and a mixing tank 4 are fixedly installed on the upper surface of the base plate 1 respectively, the nitrogen cylinder 2, the flow control valve 3 and the mixing tank 4 are connected in sequence through a connecting pipe 5, one end of a gas supply pipe 6 is connected to the outer wall of one side of the mixing tank 4, and the other end of the gas supply pipe 6 is connected to a gas supply connector 7.

[0021] Please see Figure 1 and Figure 2 One end of the gas pipe 6 is connected to the gas supply connector 7 via a pressure regulating valve 8, which is fixedly installed on the surface of the base plate 1.

[0022] At a suitable position between one end of the gas supply pipe 6 and the gas supply connector 7, connect the pressure regulating valve 8. The pressure regulating valve 8 is fixedly mounted on the surface of the base plate 1, which can be achieved by using a bracket and securing it with bolts. The connection between the pressure regulating valve 8 and the gas supply pipe 6 uses a sealed fitting to ensure a good seal at the connection point. The pressure regulating valve 8 can be an intelligent pressure regulating valve with a built-in pressure sensor and an automatic adjustment control system. The installation of the pressure regulating valve 8 further improves the device's ability to control nitrogen parameters. By precisely controlling the output nitrogen pressure, it can meet the stringent requirements of different testing instruments for nitrogen pressure, effectively improving the accuracy of zero-point calibration, thereby enhancing the reliability of the test data.

[0023] Please see Figure 3 A pressure sensor is installed inside the mixing tank 4.

[0024] A pressure sensor is installed at a suitable location inside the mixing tank 4, and can be fixed using a threaded connection or a welded mounting bracket. The signal transmission line of the pressure sensor is led out of the mixing tank 4 through a sealed connector and connected to the control system or display device. A high-precision, stable model of pressure sensor is selected to accurately measure pressure changes within the mixing tank. The presence of the pressure sensor enables the device to monitor the nitrogen pressure within the mixing tank in real time. Based on the feedback pressure data, the operating state of the pressure regulating valve 8 can be adjusted promptly to ensure stable nitrogen pressure and improve the stability and reliability of zero-point calibration.

[0025] Furthermore, a drive motor 401 is fixedly installed on one end surface of the mixing tank 4. One end of the output shaft of the drive motor 401 extends into the interior of the mixing tank 4 through a through hole and is fixedly connected to one end of the stirring rod 402. Several sets of stirring blades 403 are arranged in a ring evenly distributed on the outer wall of the stirring rod 402.

[0026] A drive motor 401 is fixedly installed at a suitable position on one end surface of the mixing tank 4, which can be achieved using a motor mount and bolts. A through hole is made at the corresponding position in the mixing tank 4, through which the output shaft of the drive motor 401 passes and is fixedly connected to one end of the stirring rod 402. The connection method can be a key connection or a coupling connection. Several sets of stirring blades 403 are welded or bolted to the outer wall of the stirring rod 402 in a uniformly distributed ring pattern. The drive motor 401 is connected to an external power supply and a control switch, allowing control of the motor's start, stop, and speed as needed. The operation of the stirring device effectively solves the problem of uneven nitrogen distribution within the mixing tank, ensuring thorough mixing of the nitrogen. The output of uniform and stable nitrogen provides a more reliable zero-point calibration gas source for the testing instrument, improving the accuracy and reliability of the instrument's zero-point calibration.

[0027] Please see Figure 2 and Figure 4A nitrogen cylinder fixing mechanism is provided on the bottom surface of the substrate 1 near the receiving groove. The nitrogen cylinder fixing mechanism includes a mounting plate 101 and two arc-shaped clamps 102. The two arc-shaped clamps 102 are opposite to each other and coaxially arranged with the receiving groove. One end of each arc-shaped clamp 102 is slidably installed in the corresponding transverse slide groove 103. The two transverse slide grooves 103 are respectively opened through the top of one side surface of the mounting plate 101. A connecting protrusion 104 is integrally provided on the other side surface of the mounting plate 101. One end of each arc-shaped clamp 102 located in the transverse slide groove 103 is integrally provided with a connecting part passing through the transverse slide groove 103. One end of a first spring 105 is fixedly connected to the side surface of each connecting part facing the connecting protrusion 104. The other ends of the two first springs 105 are respectively fixedly connected to the two sides surface of the connecting protrusion 104.

[0028] A mounting plate 101 is fixedly mounted on the bottom surface of the substrate 1 near the receiving groove. Transverse grooves 103 are precisely machined on both sides of the top edge of one side surface of the mounting plate 101. Two arc-shaped clamping plates 102 are positioned opposite each other and coaxially with the receiving groove. One end of each arc-shaped clamping plate 102 is machined with a slider adapted to the transverse groove 103, allowing it to slide within the transverse groove 103. A connecting protrusion 104 is integrally formed on the other side surface of the mounting plate 101. A connecting portion is integrally formed at one end of each arc-shaped clamping plate 102 located in the transverse groove 103, passing through the transverse groove 103. The two ends of a first spring 105 are fixedly connected to the connecting portion facing the connecting protrusion 104 and to both sides of the connecting protrusion 104. During installation, a nitrogen cylinder is placed in the receiving groove, and the two arc-shaped clamping plates move towards the nitrogen cylinder under the action of the first spring, clamping and fixing it. The design of the nitrogen cylinder fixing mechanism improves the stability of the nitrogen cylinder in the device. It effectively prevents problems such as loose connecting pipes and gas leakage caused by nitrogen cylinder shaking, ensuring the normal operation and safe use of the device.

[0029] Furthermore, an auxiliary bracket 106 is coaxially arranged below the two arc-shaped clamps 102. One end of the auxiliary bracket 106 is slidably installed in the vertical slide groove 107 and is also integrally provided with a connecting part. A second spring 108 is fixedly connected between the upper surface of the connecting part and the bottom surface of the connecting protrusion 104.

[0030] Below the two arc-shaped clamps 102, an auxiliary bracket 106 is coaxially arranged. A vertical groove 107 is machined at the corresponding position on the mounting plate 101. One end of the auxiliary bracket 106 is machined with a slider adapted to the vertical groove 107, allowing it to slide within the groove. The auxiliary bracket 106 also has an integrally formed connecting part. A second spring 108 is fixedly connected between the upper surface of this connecting part and the bottom surface of the connecting protrusion 104. During installation, the auxiliary bracket, under the action of the second spring, pushes upward against the bottom of the nitrogen cylinder, working together with the arc-shaped clamps to stably support the nitrogen cylinder. The addition of the auxiliary bracket improves the nitrogen cylinder fixing system. For heavier nitrogen cylinders, it better distributes the weight, reduces the stress on the arc-shaped clamps, improves the reliability and stability of the fixing, and further ensures the safe operation of the device.

[0031] Furthermore, protective anti-slip pads are provided on the inner walls of the two curved clamps 102 on opposite sides.

[0032] Select protective anti-slip pads of appropriate thickness and material, such as rubber. Cut the pads to a shape that fits the inner wall of the opposite side of the curved clamp, and install them on the inner wall of the curved clamp using adhesive or clips. The protective anti-slip pads not only protect the nitrogen cylinder but also enhance its fixation. This improves the stability and reliability of the nitrogen cylinder's fixation, reducing potential safety hazards and equipment malfunctions caused by cylinder slippage.

[0033] Working Principle: First, connect the gas inlet of the gas detector to the gas supply connector 7. Nitrogen flows out from the nitrogen cylinder 2, first passing through the flow control valve 3 to precisely control the flow rate, and then enters the mixing tank 4. In the mixing tank 4, the drive motor 401 drives the stirring rod 402 and stirring blades 403 to rotate, ensuring thorough and uniform mixing of the nitrogen. Simultaneously, the pressure sensor inside the tank monitors the pressure in real time. Next, the mixed nitrogen flows through the gas delivery pipe 6 to the gas supply connector 7. Along the way, the pressure regulating valve 8 precisely adjusts the nitrogen pressure based on the data fed back from the pressure sensor to meet the requirements of the detection instrument. In addition, the nitrogen cylinder fixing mechanism at the bottom of the base plate 1 uses an arc-shaped clamp and auxiliary bracket to firmly fix the nitrogen cylinder under the action of a spring. The protective anti-slip rubber pad on the inner wall of the arc-shaped clamp further enhances the fixing effect, ensuring the safe and stable operation of the entire device, thereby achieving precise nitrogen zero-point calibration of the detection instrument.

[0034] It should be noted that the specific models and specifications of nitrogen cylinder 2, flow control valve 3, drive motor 401, pressure sensor and pressure regulating valve 8 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0035] The power supply and operating principle of the nitrogen cylinder 2, flow control valve 3, drive motor 401, pressure sensor and pressure regulating valve 8 are clear to those skilled in the art and will not be described in detail here.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A nitrogen zero correction device, characterized by, Including substrate, one end surface of the substrate is provided with a containing groove, the containing groove is provided with a nitrogen cylinder, the upper surface of the substrate is respectively fixedly installed with a flow control valve and a mixing tank, the nitrogen cylinder, the flow control valve and the mixing tank are sequentially communicated and connected through the connecting pipe, one end of the gas delivery pipe is communicated and connected with the outer wall on one side of the mixing tank, the other end of the gas delivery pipe is communicated and connected with the gas supply connector.

2. The nitrogen zero correction device of claim 1, wherein: The pressure regulating valve is communicated and connected between the one end of the gas delivery pipe and the gas supply connector, and the pressure regulating valve is fixedly installed on the surface of the substrate.

3. The nitrogen zero correction device of claim 1, wherein: The mixing tank is provided with a pressure sensor inside.

4. The nitrogen zero correction device of claim 1, wherein: The driving motor is fixedly installed on the surface of the mixing tank, the output shaft of the driving motor extends to the inside of the mixing tank through the through hole and is fixedly connected with the one end of the stirring rod, and a plurality of groups of stirring blades are arranged on the outer wall of the stirring rod in a ring shape and uniformly distributed.

5. The nitrogen zero correction device of claim 1, wherein: The nitrogen cylinder fixing mechanism is provided on the bottom surface of the substrate near one end of the containing groove, the nitrogen cylinder fixing mechanism includes an installation plate and two arc-shaped clamping plates, the two arc-shaped clamping plates are arranged coaxially opposite to the containing groove, one end of each arc-shaped clamping plate is slidably installed in the corresponding transverse sliding groove, the two transverse sliding grooves are respectively formed on the two sides of the top end of the one side surface of the installation plate, the other side surface of the installation plate is integrally provided with a connecting protrusion, one end of each arc-shaped clamping plate integrally provided with a connecting part penetrating the transverse sliding groove, one end of each connecting part is fixedly connected with one end of the first spring on the one side surface, and the other end of the two first springs is fixedly connected on the two side surfaces of the connecting protrusion.

6. The nitrogen zero correction device of claim 5, wherein: The auxiliary bracket is coaxially arranged below the two arc-shaped clamping plates, one end of the auxiliary bracket is slidably installed in the vertical sliding groove and is also integrally provided with a connecting part, and the second spring is fixedly connected between the upper surface of the connecting part and the bottom surface of the connecting protrusion.

7. The nitrogen zero point correction device of claim 5, wherein: The protection anti-skid rubber pad is arranged on the inner wall of the opposite side of the two arc-shaped clamping plates.

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