Dehumidification device for fixed gas detector

Abstract

The utility model discloses a device for dehumidifying a fixed gas detector. The device comprises an electric heating dehumidifier and an adapter, the electric heating dehumidifier comprises a shell, a resistance heating piece and a heat insulation layer, the resistance heating piece and the heat insulation layer are installed in the shell, the shell is of a vertically-through structure, a probe cavity for containing a detection probe is formed, a heating cavity for containing the resistance heating piece is formed in the shell, the resistance heating piece is externally connected with a power source, and the periphery of the outer wall of the shell is covered with the heat insulation layer. The adapter is of a vertically-through structure and is fixedly connected to the probe cavity, and the detection probe penetrates through the adapter to be inserted into the probe cavity. The device only heats the detection probe of the gas detector, prevents the detection probe from being influenced by condensation dew in initial working condition gas, and has the advantages of miniaturization, low energy consumption and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detector auxiliary equipment, in particular to a device for dehumidifying a fixed gas detector. Background Art

[0002] Gas detectors (also known as gas detectors, gas detection alarms, etc.) are used to detect combustible gases, toxic gases, oxygen, etc., and are widely used in many industrial and commercial fields. The main detection principles of gas detectors are: catalytic combustion, infrared, electrochemical, and PID photoionization.

[0003] Most gas detector products require the relative humidity of the working environment to be less than 95% RH, especially for electrochemical and PID photoionization products. If the relative humidity of the working environment is too high, such as at the seaside or in the humid climate of the south, condensation is likely to form on the surface of the gas detector's detection probe. The detection probe contains a sensor, which is the core component of the gas detector and is also a component that will be affected by relative humidity. In the presence of condensation, the detection values ​​of electrochemical and PID photoionization gas detectors are likely to deviate greatly, even more than ten times. Therefore, in order to avoid condensation on the surface of the gas detector's detection probe, the current conventional method is: 1. Dehumidify the working environment of the gas detector, such as using a dehumidifier to reduce the overall humidity of the environment to be detected; 2. Install the fixed gas detector in a small box, and then install a small electric heater in the small box to heat and dehumidify the inside of the small box, including the fixed gas detector as a whole. This solution has several major disadvantages: 1. Because the entire gas detector needs to be placed, the small box is relatively large and occupies a large space; 2. The energy consumption is relatively large; 3. The overall cost is relatively high.

[0004] The utility model designs a device for dehumidifying a fixed gas detector. The electric heating dehumidifier does not heat and dehumidify the fixed gas detector as a whole, but only heats the local working gas detected by the detection probe of the fixed gas detector. The temperature of the working gas after heating is higher than the temperature of the initial working gas, which prevents condensation from forming on the surface of the detection probe and reduces the influence of condensation on the sensor in the detection probe. The technical effects achieved are: 1. Miniaturization; 2. Low energy consumption; 3. Low cost. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a fixed gas detector dehumidification device, which has a simple structure, effectively prevents condensation from forming on the surface of the detection probe of the gas detector, and has miniaturization, low energy consumption and low cost.

[0006] The utility model solves the above-mentioned technical problems as follows:

[0007] A device for dehumidifying a fixed gas detector, comprising an electrically heated dehumidifier and an adapter for connecting the electrically heated dehumidifier to the gas detector;

[0008] The electric heating dehumidifier comprises a shell, a resistance heating sheet installed inside the shell and a heat insulation layer. The shell is a through-structure from top to bottom to form a probe cavity for accommodating the detection probe. An opening is provided on the side of the shell, and a sealing cover is provided on the opening. A heating cavity for accommodating the resistance heating sheet is provided inside the shell, and the opening and the heating cavity are connected. The resistance heating sheet is attached to the inner wall of the heating cavity. The resistance heating sheet is connected to an external power supply, and the outer wall of the shell is covered with a heat insulation layer.

[0009] The adapter is a vertical through structure, the adapter is fixedly connected to the probe cavity, and the detection probe of the gas detector passes through the adapter and is inserted into the probe cavity.

[0010] The utility model supplies power to the resistance heating plate through an external power supply, and the resistance heating plate generates heat. Since the shell is made of aluminum alloy, the resistance heating plate fits the inner wall of the heating cavity, the temperature of the entire shell rises rapidly, and the outer wall of the shell is covered with a heat insulation layer. Therefore, the working gas inside the probe cavity is heated, and its temperature is higher than the temperature of the working gas initially introduced, thereby preventing condensation from forming on the surface of the detection probe of the gas detector, thereby ensuring the accuracy of the working gas value detected by the sensor in the detection probe.

[0011] The gas detector of the utility model is a product currently available on the market, such as: a combustible gas alarm, an oxygen, carbon monoxide, ammonia, hydrogen sulfide or chlorine gas detector.

[0012] The external power source of the resistance heating plate of the utility model and the power source of the gas detector can be the same source.

[0013] Furthermore, a removable lower cover is installed at the lower end of the shell, and the lower cover covers the probe cavity. The lower cover is threadedly connected to the lower end of the shell, and an air hole is provided on the lower cover for gas to pass through. The air hole ensures that the initial working condition gas to be detected can freely enter and exit the probe cavity. When the gas detector is installed in a closed working condition such as indoors, the fixed gas detector dehumidification device may not be installed with a lower cover. At this time, there is no harsh working condition gas environment such as wind, rain, dust, etc. outdoors, but the working condition gas environment may still have a high relative humidity. Therefore, the fixed gas detector dehumidification device may not be installed with a lower cover, and only needs to use an electric heating dehumidifier for dehumidification. The main purpose of the lower cover is to prevent larger particulate matter such as rainwater and branches from entering the probe cavity in harsh working condition gas environments such as outdoors.

[0014] Furthermore, a filter membrane for filtering dust and water vapor is disposed inside the lower cover. The filter membrane can further filter fine dust and water vapor, ensuring that the initial working gas entering the probe cavity has few impurities, and ensuring the accuracy of the working gas value detected by the detection sensor in the detection probe.

[0015] Furthermore, a sealing rubber ring is provided between the adapter and the detection probe to prevent dust and water from entering the probe cavity from the upper end of the probe cavity.

[0016] Furthermore, a positioning ring is extended upward from the top surface of the adapter, and first threaded holes are radially distributed on the positioning ring. Positioning bolts are screwed into the first threaded holes to abut against the detection probe, thereby fixing the detection probe inside the probe cavity.

[0017] Furthermore, a second threaded hole is axially distributed on the top surface of the adapter, and a third threaded hole is arranged on the top surface of the shell. The connecting bolt passes through the second threaded hole and is screwed into the third threaded hole to fix the adapter to the shell.

[0018] Furthermore, a terminal block is installed in the heating cavity, one end of the terminal block is connected to the resistance heating plate, and the other end of the terminal block is connected to the cable connector. The shell is also provided with a wiring hole for the cable connector to enter, and the cable wire on the cable connector can also be provided with a cable sheath.

[0019] Furthermore, the cable connector is threadedly connected to the wiring hole to prevent the cable from being torn off due to movement.

[0020] Furthermore, the shell is made of aluminum alloy, which conducts heat quickly. The lower end of the shell is provided with a weight-reducing hollow portion to ensure that the fixed gas detector dehumidification device is easy to transport and install.

[0021] Furthermore, the opening is threadedly connected to the sealing cover, which facilitates the installation of the terminal block and the resistance heating sheet.

[0022] The utility model has the following advantages over the prior art:

[0023] 1. The device for dehumidifying a fixed gas detector of the utility model is reasonably designed. It only heats the probe cavity where the gas detector detection probe is installed to prevent the detection probe from being affected by condensation in the initial working condition gas, thus meeting the advantages of miniaturization, low energy consumption and low cost.

[0024] 2. The dehumidification device for fixed gas detectors of the utility model can be used for detecting harsh working conditions such as wind, rain, dust, etc. outdoors, and can also be used for detecting closed working conditions such as indoors, and has a wide range of applications.

[0025] 3. The resistance heating sheet and the terminal block of the utility model are installed together in a sealed space composed of a heating cavity, a sealing cover, a wiring hole and a cable connector, so as to be dustproof and waterproof.

[0026] 4. The device for dehumidifying fixed gas detectors of the utility model is easy to install. For different gas detectors, the shapes or diameters of the detection probes are different. It is only necessary to adjust the adapter according to the shape or diameter of the detection probe to achieve the adapter and the detection probe adaptation. The product has strong adaptability.

[0027] 5. The shell of the electric heating dehumidifier of the utility model is made of aluminum alloy, which has rapid heat transfer and good effect.

[0028] Terms such as "upper" and "lower" used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one feature relative to another feature as shown in the drawings. It is understood that, depending on the placement of the product, the terms of spatial relative positions may be intended to include different orientations other than those shown in the drawings, and should not be construed as limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a device for dehumidifying a fixed gas detector according to the utility model.

[0030] Figure 2 yes Figure 1 Sectional view.

[0031] Figure 3 yes Figure 1 Exploded diagram.

[0032] Figure 4 yes Figure 3 A partial cross-sectional view of .

[0033] 1: Gas detector; 1-1 Instrument head; 1-2: Detection probe; 2: Adapter; 2-1: Second threaded hole; 2-2: Connecting bolt; 2-3: First threaded hole; 2-4: Positioning bolt; 2-5: Positioning ring; 2-6: Sealing rubber ring; 3: Electric heating dehumidifier; 3-1: Shell; 3-2: Insulation layer; 3-3: Probe cavity; 3-4: Third threaded hole; 3-5: Weight reduction hollowing; 3-6: Opening; 3-7: Heating cavity; 3-8: Sealing cover; 3-9: Wiring hole; 3-10: Cable connector; 3-11: Cable sheath; 3-12: Cable line; 3-13: Terminal block; 3-14: Resistance heating sheet; 4: Filter membrane; 5: Lower cover; 5-2: Air vent. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Embodiment 1:

[0036] like Figure 1 , Figure 2 As shown, the device for dehumidifying a fixed gas detector includes an electric heating dehumidifier 3 and an adapter 2 for connecting the electric heating dehumidifier 3 and the gas detector 1;

[0037] like Figure 2 , Figure 3 As shown, the electric heating dehumidifier 3 includes a shell 3-1, a resistance heating sheet 3-14 installed inside the shell 3-1, and a heat insulation layer 3-2. The shell 3-1 is a through structure from top to bottom, forming a probe cavity 3-3 for accommodating the detection probe 1-2. An opening 3-6 is provided on the side of the shell 3-1, and a sealing cover 3-8 is provided on the opening 3-6. A heating cavity 3-7 for accommodating the resistance heating sheet 3-14 is provided inside the shell 3-1. The opening 3-6 and the heating cavity 3-7 are connected, and the resistance heating sheet 3-14 is attached to the inner wall of the heating cavity 3-7. The resistance heating sheet 3-14 is externally connected to a power supply, and the outer wall of the shell 3-1 is covered with a heat insulation layer 3-2 on all sides.

[0038] like Figure 3 , Figure 4 As shown, the adapter 2 is a vertical through structure, the adapter 2 is fixed to the probe cavity 3-3, and the detection probe 1-2 of the gas detector 1 passes through the adapter 2 and is inserted into the probe cavity 3-3.

[0039] like Figure 1 , Figure 2 As shown, the utility model supplies power to the resistance heating plate 3-14 through an external power supply, and the resistance heating plate 3-14 generates heat. Since the shell 3-1 is made of aluminum alloy, the resistance heating plate 3-14 fits the inner wall of the heating cavity 3-7, and the temperature of the entire shell 3-1 rises rapidly. The outer wall of the shell 3-1 is covered with a heat insulation layer 3-2. Therefore, the working gas inside the probe cavity 3-3 is heated, and its temperature is higher than the temperature of the initial working gas introduced, preventing condensation from forming on the surface of the detection probe 1-2 of the gas detector 1, thereby ensuring the accuracy of the working gas value detected by the detection sensor in the detection probe 1-2.

[0040] like Figure 1 , Figure 2As shown, the gas detector 1 of the utility model is a product currently available on the market, purchased from Taobao: combustible gas alarm, oxygen, carbon monoxide, ammonia, hydrogen sulfide or chlorine gas detector. The gas detector 1 includes an instrument header 1-1 and a detection probe 1-2.

[0041] In this embodiment, the external power supply of the resistance heating plate 3 - 14 and the power supply of the gas detector 1 are from the same source.

[0042] In this embodiment, Figure 1 , Figure 2 , Figure 3 As shown, a detachable lower cover 5 is also installed at the lower end of the shell 3-1, and the lower cover 5 covers the probe cavity 3-3. The lower cover 5 is threadedly connected to the lower end of the shell 3-1, and a vent hole 5-2 for gas to pass through is opened on the lower cover 5. The vent hole 5-2 ensures that the initial working condition gas to be detected can freely enter and exit the probe cavity 3-3. In this embodiment, the fixed gas detector dehumidification device is installed with a lower cover 5. The main purpose of the lower cover 5 is to prevent rainwater, branches and other large particles from entering the probe cavity 3-3 in a harsh working condition gas environment such as outdoors.

[0043] In this embodiment, Figure 1 , Figure 2 , Figure 3 As shown, a filter membrane 4 for filtering dust and water vapor is disposed inside the lower cover 5. The filter membrane 4 can further filter fine dust and water vapor, ensuring that the initial working condition gas entering the probe cavity 3-3 has few impurities, and ensuring the accuracy of the working condition gas value detected by the detection sensor in the detection probe 1-2.

[0044] In this embodiment, Figure 3 , Figure 4 As shown, a sealing rubber ring 2-6 is also provided between the adapter 2 and the detection probe 1-2. Dust and water enter the probe cavity 3-3 from the upper end of the probe cavity 3-3.

[0045] In this embodiment, Figure 3 , Figure 4 As shown, a positioning ring 2-5 extends upward from the top surface of the adapter 2, and the positioning ring 2-5 has first threaded holes 2-3 radially distributed therein. The positioning bolts 2-4 are screwed into the first threaded holes 2-3 to abut against the detection probe 1-2, thereby fixing the detection probe 1-2 inside the probe cavity 3-3.

[0046] In this embodiment, Figure 3 , Figure 4 As shown, the top surface of the adapter 2 is axially distributed with a second threaded hole 2-1, the top surface of the shell 3-1 is provided with a third threaded hole 3-4, and the connecting bolt 2-2 passes through the second threaded hole 2-1 and is screwed into the third threaded hole 3-4 to fix the adapter 2 to the shell 3-1.

[0047] In this embodiment, Figure 2 , Figure 3 As shown, a terminal block 3-13 is installed in the heating cavity 3-7, one end of the terminal block 3-13 is connected to the resistance heating plate 3-14, and the other end of the terminal block 3-13 is connected to the cable connector 3-10. The shell 3-1 is also provided with a wiring hole 3-9 for the cable connector 3-10 to enter, and the cable line 3-12 on the cable connector 3-10 is also provided with a cable sheath 3-11.

[0048] In this embodiment, Figure 3 As shown, the cable connector 3-10 is threadedly connected to the wiring hole 3-9 to prevent the cable 3-12 from being torn off due to movement.

[0049] In this embodiment, Figure 3 As shown, the shell 3-1 is made of aluminum alloy, which conducts heat quickly. The lower end of the shell 3-1 is provided with a weight-reducing hollow 3-5 to ensure that the fixed gas detector dehumidification device is easy to transport and install.

[0050] In this embodiment, Figure 3 As shown, the opening 3-6 is threadedly connected to the sealing cover 3-8, which facilitates the installation of the terminal block 3-13 and the resistance heating plate 3-14.

[0051] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A device for dehumidifying a fixed gas detector, characterized in that: It includes an electric heating dehumidifier and an adapter for connecting the electric heating dehumidifier and a gas detector; The electric heating dehumidifier comprises a shell, a resistance heating sheet installed inside the shell, and a heat insulation layer. The shell is a through-structure from top to bottom, forming a probe cavity for accommodating the detection probe. An opening is provided on the side of the shell, and a sealing cover is provided on the opening. A heating cavity for accommodating the resistance heating sheet is provided inside the shell, and the opening and the heating cavity are through-connected. The resistance heating sheet is attached to the inner wall of the heating cavity, the resistance heating sheet is connected to an external power supply, and the outer wall of the shell is covered with a heat insulation layer. The adapter is a vertical through structure, the adapter is fixedly connected to the probe cavity, and the detection probe of the gas detector passes through the adapter and is inserted into the probe cavity.

2. The device for dehumidifying a fixed gas detector according to claim 1, characterized in that: A detachable lower cover is also installed at the lower end of the shell, the lower cover covers the probe cavity, and a vent hole for gas to pass through is opened on the lower cover.

3. The device for dehumidifying a fixed gas detector according to claim 2, characterized in that: A filter membrane for filtering dust and water vapor is arranged inside the lower cover.

4. The device for dehumidifying a fixed gas detector according to claim 1, characterized in that: A sealing rubber ring is also arranged between the adapter and the detection probe.

5. The device for dehumidifying a fixed gas detector according to claim 1, characterized in that: A circle of positioning ring is extended upward from the top surface of the adapter, and first threaded holes are radially distributed on the positioning ring. Positioning bolts are screwed into the first threaded holes to abut against the detection probe.

6. The device for dehumidifying a fixed gas detector according to claim 5, characterized in that: A second threaded hole is axially distributed on the top surface of the adapter, and a third threaded hole is arranged on the top surface of the shell. The connecting bolt passes through the second threaded hole and is screwed into the third threaded hole to fix the adapter to the shell.

7. The device for dehumidifying a fixed gas detector according to claim 1, characterized in that: A terminal block is installed in the heating cavity, one end of the terminal block is connected to the resistance heating plate, and the other end of the terminal block is connected to the cable connector. The shell is also provided with a wiring hole for the cable connector to enter.

8. The device for dehumidifying a fixed gas detector according to claim 7, characterized in that: The cable connector is threadedly connected to the wiring hole.

9. The device for dehumidifying a fixed gas detector according to claim 1, characterized in that: The shell is made of aluminum alloy, and a weight-reducing hollow portion is provided at the lower end of the shell.

10. The device for dehumidifying a fixed gas detector according to claim 1, characterized in that: The opening is threadedly connected to the sealing cover.

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