Protective gas replacement device for gas detection instrument

Abstract

The utility model relates to the technical field of gas replacement, and provides a protective gas replacement device for a gas detection instrument, which comprises a gas supply pipe communicated with a gas source and used for providing protective gas; the gas inlet pipe is communicated with the gas supply pipe and is used for introducing protective gas; the shunting pipe is communicated with the gas inlet pipe and is used for shunting the protective gas; the plurality of branch pipes are arranged side by side, are respectively communicated with the shunt pipe, and are used for injecting the protective gas into the detected gas detection instrument so as to replace corrosive or oxidizing gas remained in the gas detection instrument; wherein the air inlet pipe is sequentially provided with a first switch valve, a first pressure reducing valve with a pressure gauge and a second switch valve, and each branch pipe is sequentially provided with a third switch valve, a second pressure reducing valve with a pressure gauge and a quick connector. The protective gas is controlled by the first pressure reducing valve and the second pressure reducing valve and then injected into the gas detection instrument needing to be maintained in the measuring range conforming to the instrument, and corrosive or oxidizing gas remaining in the instrument can be exhausted, so that the instrument is protected to reduce the maintenance frequency.

Description

Technical Field

[0001] This utility model relates to the field of gas replacement technology, specifically to a protective gas replacement device for a gas detection instrument. Background Technology

[0002] Currently, due to production process regulations, dew point meters and micro-oxygen meters are required to detect dew point and micro-oxygen levels in devices and pipelines containing corrosive gases. After testing, residual corrosive or oxidizing gases inside the dew point and micro-oxygen meters can cause corrosion or oxidation damage to these gas detection instruments, leading to the following problems:

[0003] 1. After testing, dew point meters and micro-oxygen meters that have not received effective maintenance require more frequent and costly repairs and have a shorter lifespan.

[0004] 2. Dew point meters and micro-oxygen meters that are not properly maintained are more likely to malfunction, affecting testing efficiency and even delaying testing. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a protective gas replacement device for gas detection instruments, thereby solving the problems of high maintenance frequency and short service life of existing gas detection instruments.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A protective gas replacement device for a gas detection instrument, comprising:

[0008] Gas supply pipe, connected to the gas source, used to provide protective gas;

[0009] An air inlet pipe, connected to the air supply pipe, is used to introduce protective gas;

[0010] A diversion pipe, connected to the intake pipe, is used to divert protective gas; and

[0011] Multiple branch pipes are arranged side by side, each connected to the diversion pipe, and are used to inject protective gas into the gas detection instrument after testing to displace the corrosive or oxidizing gas remaining inside.

[0012] The intake pipe is sequentially equipped with a first switching valve, a first pressure reducing valve with a pressure gauge, and a second switching valve. Each branch pipe is sequentially equipped with a third switching valve, a second pressure reducing valve with a pressure gauge, and a quick connector.

[0013] In one embodiment disclosed in this application, the diverter pipe is connected to the intake pipe via a first tee connector;

[0014] The branch pipe is connected to the diversion pipe through a second tee connector.

[0015] In one embodiment disclosed in this application, both the first tee connector and the second tee connector have one inlet and two outlets;

[0016] The inlet of the first three-way connector is connected to the air intake pipe, and the outlet is connected to one end of the splitter pipe;

[0017] The inlet of the second three-way connector is connected to the other end of the diversion pipe, and the outlet is connected to the branch pipe.

[0018] In one embodiment disclosed in this application, the first tee connector is a reducing tee with a large inlet and a small outlet;

[0019] The second tee connector is an equal diameter tee.

[0020] In one embodiment disclosed in this application, each branch pipe is divided into a rigid pipe and a flexible pipe that are interconnected, and the rigid pipe is connected to the outlet of the second tee connector;

[0021] The third switching valve and the second pressure reducing valve with a pressure gauge are sequentially installed on the rigid pipe;

[0022] One end of the hose is connected to the second pressure reducing valve with a pressure gauge, and the other end is connected to the quick connector.

[0023] In one embodiment disclosed in this application, the first switching valve, the second switching valve, and the third switching valve are all one-way valves.

[0024] In one embodiment disclosed in this application, when not replaced, the quick connector is covered with a plug to prevent dust from entering.

[0025] In one embodiment disclosed in this application, pH test strips are also included;

[0026] The pH test strip is attached to the outlet of the gas detector to detect whether the corrosive or oxidizing gas remaining inside the gas detector has an irritating odor, in order to determine the replacement time of the protective gas.

[0027] In one embodiment disclosed in this application, the gas source is a protective gas generator.

[0028] In one embodiment disclosed in this application, the protective gas is nitrogen.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] 1. After being controlled by the first and second pressure reducing valves, the protective gas is injected into the gas detection instrument that needs maintenance at a range that matches the instrument's capacity. This can quickly expel any residual corrosive or oxidizing gases inside the instrument, thereby effectively protecting the internal pipelines from corrosion and oxidation. This significantly reduces the frequency of instrument maintenance and lowers maintenance costs, allowing the instrument to maintain its original detection performance after use and reducing the possibility of malfunctions. This ensures the durability of the instrument and improves detection efficiency.

[0031] 2. The replacement time of the protective gas is determined by whether the pH test paper changes color. The operation is simple and practical, and the consumption of the protective gas can be controlled in a targeted manner, thereby controlling maintenance costs and achieving cost reduction and efficiency improvement. In addition, there is no need to manually smell the irritating odor, so the safety risks are low. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0040] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0041] See Figure 1 As shown, this utility model provides a protective gas replacement device for a gas detection instrument, comprising:

[0042] Gas supply pipe 1 is connected to a gas source (not shown in the figure) and is used to provide protective gas;

[0043] Inlet pipe 2 is connected to air supply pipe 1 and is used to introduce protective gas;

[0044] Diverter pipe 3, connected to intake pipe 2, is used to divert protective gas; and

[0045] Branch pipes 4, multiple of which are arranged side by side, are connected to the diversion pipe 3 respectively, and are used to inject protective gas into the gas detection instrument after testing to replace the corrosive or oxidizing gas remaining inside it.

[0046] The intake pipe 2 is sequentially equipped with a first switching valve 5, a first pressure reducing valve 6 with a pressure gauge, and a second switching valve 7. Each branch pipe 4 is sequentially equipped with a third switching valve 8, a second pressure reducing valve 9 with a pressure gauge, and a quick connector 10.

[0047] Specifically, the gas source is a device or container that provides protective gas, preferably a protective gas generator, which is introduced into the laboratory through the gas supply pipe 1; the first switch valve 5, the second switch valve 7, and the third switch valve 8 installed on the inlet pipe 2 and each branch pipe 4 are responsible for controlling the on / off of the protective gas. To ensure unidirectional flow of the protective gas, one-way valves are selected to ensure that the protective gas can be replaced and protected according to the parameters set by the gas detection instruments such as the dew point meter and the micro-oxygen meter; the first pressure reducing valve 6 with a pressure gauge installed on the inlet pipe 2 and the second pressure reducing valve 9 with a pressure gauge installed on each branch pipe 4 are responsible for controlling the flow rate of the protective gas. The pipeline pressure can be observed at any time through the pressure gauges; the quick connector 10 is compatible with the inlet of the gas detection instruments such as the dew point meter and the micro-oxygen meter to ensure the airtightness of the gas circuit and the quick and convenient connection.

[0048] When using the instrument, first check if the gas supply is sufficient. If the gas supply is sufficient, open the flow control valve of the gas detector that needs to be replaced with protective gas. Then connect the inlet of the gas detector to the quick connector 10 on a branch pipe 4. Next, sequentially open the third switch valve 8 on the branch pipe 4, the second switch valve 7 on the inlet pipe 2, and the first switch valve 5 (if replacing one gas detector, the third switch valve 8 on other branch pipes 4 should be closed to ensure the effectiveness of the replacement process). This allows the protective gas supplied by the gas source to enter the branch pipe 4 through the supply pipe 1, inlet pipe 2, and branch pipe 3, and be injected into the gas detector to replace any residual corrosive or oxidizing gases. Slightly tighten the first pressure reducing valve 6 with a pressure gauge on the inlet pipe 2 and the second pressure reducing valve 9 with a pressure gauge on the branch pipe 4, observing the pressure gauge readings and the flow rate on the gas detector to ensure the pressure and flow rate of the protective gas are within the instrument's range. After the predetermined replacement time, quickly close the first switch valve 5, the second switch valve 7, the third switch valve 8 on the branch pipe 4, and the flow control valve of the gas detector to meet the protection requirements. In other words, after the protective gas is controlled by the first and second pressure reducing valves, it is injected into the gas detection instrument that needs maintenance within the range of the instrument. This can quickly expel any residual corrosive or oxidizing gases inside the instrument, thereby effectively protecting the internal pipelines from corrosion and oxidation. This significantly reduces the frequency of instrument maintenance and lowers maintenance costs, allowing the instrument to maintain its original detection performance after use and reducing the possibility of malfunctions. This ensures the durability of the instrument and improves detection efficiency.

[0049] To ensure the normal operation and long-term use of this replacement device, the following maintenance and upkeep work needs to be performed regularly:

[0050] 1. Check the gas supply and pressure to ensure a stable supply;

[0051] 2. Clean the dust and dirt from all components and pipelines to prevent affecting the replacement effect of the protective gas;

[0052] 3. After each use, promptly cover the plug at the outlet end of each branch pipe 4 (i.e., at the quick connector 10) to prevent dust from entering.

[0053] In this embodiment, the protective gas is an inert gas, preferably nitrogen. Nitrogen is readily available and inexpensive, and can effectively delay or prevent oxidation reactions inside the instrument and its pipelines, thereby protecting the instrument from corrosion and damage.

[0054] The splitter pipe 3 is connected to the intake pipe 2 via the first tee connector 11, and the branch pipe 4 is connected to the splitter pipe 3 via the second tee connector 12. Specifically, both the first tee connector 11 and the second tee connector 12 have one inlet and two outlets. The inlet of the first tee connector 11 is connected to the intake pipe 2, and the outlet is connected to one end of the splitter pipe 3. The inlet of the second tee connector 12 is connected to the other end of the splitter pipe 3, and the outlet is connected to the branch pipe 4.

[0055] In this embodiment, the first tee connector 11 is a reducing tee with a large inlet and a small outlet; the second tee connector 12 is an equal diameter tee.

[0056] Each branch pipe 4 is divided into an interconnected rigid pipe 41 and a flexible pipe 42. The rigid pipe 41 is connected to the outlet of the second tee connector 12. The third switch valve 8 and the second pressure reducing valve 9 with a pressure gauge are sequentially installed on the rigid pipe 41. One end of the flexible pipe 42 is connected to the second pressure reducing valve 9 with a pressure gauge, and the other end is connected to the quick connector 10. The flexible pipe uses 1 / 8" F46 tubing, which is not easily broken or damaged, and its length is between 0.5 and 1.5 m. It can be quickly connected to the air inlet of the gas detection instrument through the 1 / 8" quick connector 10.

[0057] The aforementioned protective gas replacement device for gas detection instruments also includes pH test paper (not shown in the figure). The pH test paper is attached to the gas outlet of the gas detection instrument to detect whether residual corrosive or oxidizing gases inside the instrument have an irritating odor, thus determining the replacement time for the protective gas. At the start of replacement, protective gas is injected into the gas detection instrument, causing the residual corrosive or oxidizing gases to gradually escape and be blown towards the pH test paper. If the pH test paper turns red, it indicates that the residual corrosive or oxidizing gases inside the gas detection instrument have a noticeable irritating odor, requiring 30 minutes of continuous purging with protective gas. If the pH test paper does not change color, it indicates that the residual corrosive or oxidizing gases inside the gas detection instrument do not have a noticeable irritating odor, requiring only 5 minutes of purging with protective gas to achieve the desired maintenance effect. In other words, determining the replacement time for the protective gas by the color change of the pH test paper is simple and practical, allowing for targeted control of protective gas consumption, thereby controlling maintenance costs and achieving cost reduction and efficiency improvement. Furthermore, it eliminates the need for manual smelling of irritating odors, minimizing safety risks.

[0058] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A protective gas replacement device for a gas detection instrument, characterized by, The protective gas replacement device for the gas detection instrument comprises: a gas supply pipe in communication with a gas source for providing protective gas; a gas inlet pipe in communication with the gas supply pipe for introducing protective gas; a gas distribution pipe in communication with the gas inlet pipe for distributing protective gas; and a plurality of branch pipes arranged side by side and in communication with the gas distribution pipe respectively for injecting protective gas into a gas detection instrument to replace corrosive or oxidizing gas remaining in the gas detection instrument. The gas inlet pipe is sequentially provided with a first on-off valve, a first pressure-reducing valve with a pressure gauge and a second on-off valve, and each of the branch pipes is sequentially provided with a third on-off valve, a second pressure-reducing valve with a pressure gauge and a quick connector.

2. The protective gas replacement device for the gas detection instrument according to claim 1, wherein: the gas distribution pipe is in communication with the gas inlet pipe through a first tee joint; the branch pipes are in communication with the gas distribution pipe through a second tee joint.

3. The protective gas replacement device for the gas detection instrument according to claim 2, wherein: the first tee joint and the second tee joint each have one inlet and two outlets; the inlet of the first tee joint is connected to the gas inlet pipe, and the outlet is connected to one end of the gas distribution pipe; the inlet of the second tee joint is connected to the other end of the gas distribution pipe, and the outlet is connected to the branch pipes.

4. The protective gas replacement device for the gas detection instrument according to claim 2 or 3, wherein: the first tee joint is a variable-diameter tee joint with a large inlet and a small outlet; the second tee joint is a constant-diameter tee joint.

5. The protective gas replacement device for the gas detection instrument according to claim 4, wherein: each of the branch pipes is divided into a hard pipe and a soft pipe in communication with each other, and the hard pipe is connected to the outlet of the second tee joint; the third on-off valve and the second pressure-reducing valve with a pressure gauge are sequentially installed on the hard pipe; one end of the soft pipe is connected to the second pressure-reducing valve with a pressure gauge, and the other end is connected to the quick connector.

6. The protective gas replacement device for a gas detection instrument according to claim 5, wherein The first on-off valve, the second on-off valve and the third on-off valve are all one-way valves.

7. The apparatus according to claim 5, wherein When not replacing, the quick connector is covered with a plug to prevent dust from entering.

8. The protective gas replacement device for the gas detection instrument according to any one of claims 1, 5-7, wherein: the device further comprises pH test paper; the pH test paper is attached to the gas outlet of the gas detection instrument for detecting whether corrosive or oxidizing gas remaining in the gas detection instrument has a pungent smell to determine the replacement duration of protective gas.

9. The apparatus according to claim 1, wherein The gas source is a protective gas generator.

10. The apparatus according to claim 1 or 9, wherein The protective gas is nitrogen.

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