Water-draining type gas detector waterproof protection device

Abstract

The utility model discloses a drainable waterproof protection device for a gas detector, which comprises a buffer cavity, a gas collection pipe, a gas detection interface, a drainage pipe, a gas detection interface and a gas detection interface, and is characterized in that one end of the buffer cavity is communicated with a gas collection pipe; the liquid one-way valve is arranged at the bottom of the buffer cavity and is close to one end of the buffer cavity; the hydrophobic breathable film is arranged in the buffer cavity and is close to the other end of the buffer cavity. According to the utility model, the gas collecting pipe can be prevented from sucking accumulated water in the tank body into the gas detector to cause instrument damage.

Description

Technical Field

[0001] This utility model belongs to the field of waterproof protection technology, and in particular relates to a waterproof protection device for a drainable gas detector. Background Technology

[0002] During the construction or maintenance of petrochemical plants, it is necessary to open the manholes of the tanks for work. If the manholes are not closed tightly, rainwater can easily enter the tank through the manholes during rainy weather, causing water to accumulate at the bottom of the tank.

[0003] Construction workers need to enter confined spaces such as tanks to perform various welding, inspection, and maintenance operations. Before entering the tank, gas detection is required to ensure personnel safety. Current methods for gas detection in tanks include... Figure 1 As shown: The testing personnel place the extended gas sampling tube into the tank, with the other end connected to a gas detector. The detector uses an air pump to draw the gas from the end of the sampling tube into the instrument for testing, thus detecting the gas composition in different parts of the tank. Due to insufficient light inside the tank, the testing personnel may not be able to clearly see if there is water accumulation inside. Therefore, if there is water at the bottom of the tank, and the end of the sampling tube comes into contact with the water, the water will be drawn into the instrument along the sampling tube when the detector is activated. By the time the testing personnel discover that the sampling tube has drawn in water, there is insufficient time to react; the water has already been instantly drawn into the detector by the air pump, causing damage to the instrument. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a waterproof protection device for a drainable gas detector to prevent the gas collection tube from sucking water accumulated in the tank into the gas detector and causing damage to the instrument.

[0005] To achieve the above objectives, this utility model is implemented using the following solution:

[0006] This utility model provides a waterproof protection device for a drainable gas detector, comprising:

[0007] The buffer chamber has one end connected to the gas collection tube and the other end connected to the gas detection interface of the gas detector.

[0008] A liquid check valve is located at the bottom of the buffer chamber, near one end of the buffer chamber;

[0009] A hydrophobic and breathable membrane is placed in the buffer cavity, near the other end of the buffer cavity.

[0010] Optionally, the liquid check valve includes:

[0011] a valve cavity, which is communicated with the buffer cavity and the atmosphere respectively at two ends thereof;

[0012] a spring, which is installed in the valve cavity and abuts against an inner wall of one end of the valve cavity;

[0013] a steel ball, which is installed in the valve cavity and abuts against the opening of the bottom of the buffer cavity and the other end of the spring respectively.

[0014] Optionally, the waterproof and breathable membrane is further provided with a non-woven fabric, which is arranged in the other end of the buffer cavity.

[0015] Optionally, the waterproof and breathable membrane is further provided with blue silica gel, which is arranged in the buffer cavity and abuts against the non-woven fabric and the waterproof and breathable membrane.

[0016] Optionally, the waterproof and breathable membrane is further provided with an O-shaped sealing ring, which is fixedly arranged on both sides of the waterproof and breathable membrane and is sealingly installed in the buffer cavity.

[0017] Optionally, the material of the O-shaped sealing ring is silica gel.

[0018] Optionally, the material of the waterproof and breathable membrane is polyethylene.

[0019] Optionally, the material of the buffer cavity is metal. Advantages

[0020] The waterproof and breathable membrane can pass gas and block liquid water in the buffer cavity from flowing out through the liquid check valve, so that the water accumulated in the tank body is prevented from being sucked into the gas detector through the gas collection pipe, thereby preventing damage to the instrument. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the current gas detection of the tank body described in the background art;

[0022] Figure 2 is a structural schematic diagram of a waterproof protection device of a drainable gas detector according to Embodiment 2 of the present application;

[0023] In the figure: 1, non-woven fabric; 2, liquid check valve; 3, buffer cavity; 4, waterproof and breathable membrane; 5, blue silica gel; 6, gas detection interface; 7, gas collection pipe. DETAILED DESCRIPTION

[0024] The specific implementation of the present application will be further described below in combination with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0025] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation", "connection", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements inside.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood through specific circumstances.

[0026] In the description of the utility model, it is necessary to understand that, the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. Embodiment 1

[0027] As Figure 2 shown, the embodiment provides a waterproof protection device for a drainable gas detector, which is composed of a buffer cavity 3, a liquid check valve 2 and a hydrophobic gas permeable membrane 4;One end of the buffer cavity 3 is communicated with the gas collection pipe 7, and the other end is communicated with the gas detection interface 6 of the gas detector;The liquid check valve 2 is arranged at the bottom of the buffer cavity 3 and close to one end of the buffer cavity 3;The hydrophobic gas permeable membrane 4 is arranged in the buffer cavity 3 and close to the other end of the buffer cavity 3.The hydrophobic gas permeable membrane 4 of the waterproof protection device for the drainable gas detector can pass through the gas and block the liquid water in the buffer cavity 3 from flowing out through the liquid check valve 2, preventing the gas collection pipe from sucking the accumulated water in the can body into the gas detector and causing damage to the instrument. Embodiment 2

[0028] As Figure 2 shown, the embodiment provides a waterproof protection device for a drainable gas detector, which is composed of a buffer cavity 3, a liquid check valve 2 and a hydrophobic gas permeable membrane 4;One end of the buffer cavity 3 is communicated with the gas collection pipe 7, and the other end is communicated with the gas detection interface 6 of the gas detector;The liquid check valve 2 is arranged at the bottom of the buffer cavity 3 and close to one end of the buffer cavity 3;The hydrophobic gas permeable membrane 4 is arranged in the buffer cavity 3 and close to the other end of the buffer cavity 3.

[0029] Specifically, the buffer cavity 3 is made of metal, the cavity is divided into two parts, and the two parts are screwed and sealed by threads and related sealing members, so as to install the hydrophobic and air-permeable film 4 and other components in the buffer cavity 3; an opening is formed in the bottom of the buffer cavity 3. The liquid check valve 2 is composed of a valve cavity, a spring and a steel ball; one end of the valve cavity is connected to the opening in the bottom of the buffer cavity 3 to communicate with the buffer cavity 3, and the other end of the valve cavity is open to the atmosphere; the spring is installed in the valve cavity, one end of the spring abuts against the inner wall of one end of the valve cavity; the steel ball is installed in the valve cavity, and the two ends of the steel ball abut against the opening in the bottom of the buffer cavity 3 and the other end of the spring, respectively, so that the steel ball under the opening in the bottom of the buffer cavity 3 is tightly pressed by the spring, thereby preventing the buffer cavity 3 from being directly communicated with the atmosphere, and achieving the one-way flow effect that the liquid in the buffer cavity 3 can only flow out from the inside and the external atmosphere cannot enter the buffer cavity 3 from the outside.

[0030] The other end of the buffer cavity 3 contains the non-woven fabric 1, which can prevent mechanical impurities from entering the gas detector. The blue silica gel 5 placed on the non-woven fabric can adsorb a small amount of water vapor and prevent water vapor from entering the gas detector, and can also support the hydrophobic and air-permeable film 4 above, so that the hydrophobic and air-permeable film 4 is not easily damaged by the suction force generated by the gas detector and the gas collection pipe 7 during operation. The material of the hydrophobic and air-permeable film 4 is PE, and the hydrophobic and air-permeable film 4 can pass gas but block liquid water in the buffer cavity 3; O-shaped sealing rings are fixedly arranged on both sides of the hydrophobic and air-permeable film 4, and the O-shaped sealing rings are sealingly installed in the buffer cavity 3 to prevent water from entering the gas detector through the gap between the hydrophobic and air-permeable film 4 and the buffer cavity 3.

[0031] Working principle:

[0032] During operation, if there is accumulated water in the tank body, the water is sucked into the drainable gas detector waterproof protection device from the gas collection pipe 7 by the gas detector, and the water is intercepted in the buffer cavity 3 by the hydrophobic and air-permeable film 4; when the water accumulates to a certain degree, the steel ball is pressed to move downward, and the water flows out from the liquid check valve 2; after the water flows out, the pressure on the steel ball is reduced, and the steel ball is again tightly pressed against the opening in the bottom of the buffer cavity 3 to form a seal under the action of the spring.

[0033] The above only describes preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A water protection device for a water drainable gas detector, characterized in that, The application relates to a gas collection device. The device comprises: a buffer cavity, one end of which is connected with a gas collection pipe, and the other end of which is connected with a gas detection interface of a gas detector; a liquid one-way valve arranged at the bottom of the buffer cavity and close to one end of the buffer cavity; 2. The water protection device for a water drainable gas detector according to claim 1, wherein a hydrophobic gas-permeable membrane arranged in the buffer cavity and close to the other end of the buffer cavity. The liquid one-way valve comprises: a valve cavity, two ends of which are respectively connected with the buffer cavity and the atmosphere; a spring installed in the valve cavity, one end of the spring abutting against the inner wall of one end of the valve cavity; 3. The water protection device for a water drainable gas detector according to claim 1, wherein a steel ball installed in the valve cavity, two ends of the steel ball abutting against the opening of the bottom of the buffer cavity connected with the valve cavity and the other end of the spring.

4. The water protection device for a water drainable gas detector according to claim 3, characterized in that, The device further comprises a non-woven fabric arranged in the other end of the buffer cavity.

5. The water protection device for a water drainable gas detector according to claim 1, wherein The device further comprises blue silica gel arranged in the buffer cavity and abutting against the non-woven fabric and the hydrophobic gas-permeable membrane.

6. The water protection device for a water drainable gas detector according to claim 5, wherein The device further comprises O-shaped sealing rings fixedly arranged on both sides of the hydrophobic gas-permeable membrane, and the O-shaped sealing rings are sealingly installed in the buffer cavity.

7. The water protection device for a water drainable gas detector of claim 1, wherein, The material of the O-shaped sealing rings is silica gel.

8. The water protection device for a water drainable gas detector of claim 1, wherein, The material of the hydrophobic gas-permeable membrane is polyethylene. The material of the buffer cavity is metal.

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