Protective shell for gas alarm instrument

Abstract

The utility model discloses a protective housing for a gas alarm instrument, which relates to the technical field of gas alarm instruments and comprises a gas alarm instrument main body and a protective mechanism, the gas alarm instrument main body comprises a gas alarm instrument body, and an alarm lamp is fixedly mounted on the left side of the gas alarm instrument body. Mounting clamping plates are fixedly mounted on the left side and the right side of the rear end of the gas alarm instrument body, round clamping grooves are formed in the opposite faces of the two mounting clamping plates, the protection mechanism comprises a C-shaped fixing plate, and damping springs are fixedly connected to the left side and the right side of the opposite face of the horizontal position of the C-shaped fixing plate. According to the utility model, through the cooperation between the mounting box contained in the C-shaped fixing plate and the mounting clamping plate on the rear side of the gas alarm instrument, the gas alarm instrument can be quickly disassembled and assembled, meanwhile, the vibration influence on the gas alarm instrument during underground detection can be effectively reduced by utilizing the four damping springs after the gas alarm instrument is installed, and the stability of the gas alarm instrument during detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas alarm instruments, in particular to a protective shell for a gas alarm instrument. Background Art

[0002] A gas alarm is a gas leak detection alarm instrument. When flammable or toxic gas leaks in an industrial environment, and when the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poisoning alarm, the alarm will send out an alarm signal to remind workers to take safety measures and drive the exhaust, cut-off, and spray systems to prevent explosions, fires, and poisoning accidents, thereby ensuring safe production. In areas where gas has been proven to be present, gas alarms are standard equipment for drilling, well repair, and geological exploration. Gas alarms can measure gas types and concentrations in real time, display in real time, give real-time sound and light alarms, or implement control actions to ensure the safety of construction personnel and equipment. The following problems exist in the prior art:

[0003] Because the existing gas alarm is usually installed by bolting, but during the drilling process, the underground environment will vibrate from time to time, which may cause the installed gas alarm bolts to loosen after a long time, resulting in the gas alarm falling and damage. At the same time, the existing gas alarm is usually equipped with a gas sensor. When the gas sensor encounters gas, the resistance of the sensor changes with the gas concentration, and an electrical signal is generated for processing by the back-stage circuit of the gas alarm. After being processed by the electronic circuit, it becomes a voltage signal with a proportional change in concentration. After linear circuit compensation, the signal is linearized. After microcomputer processing and logic analysis, various control signals are output. That is, when the gas concentration reaches the alarm setting value, the gas alarm sends out an audible and visual alarm signal, and can display the gas concentration or start external transport equipment (such as exhaust fans, solenoid valves). However, due to the presence of a large amount of floating objects in the underground air environment, when a large amount of floating objects are attached to the gas sensor, it is likely to cause errors in the detection of the gas sensor, causing certain safety hazards. Utility Model Content

[0004] The utility model provides a protective shell for a gas alarm instrument to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A protective shell for a gas alarm comprises a gas alarm body and a protective mechanism, wherein the gas alarm body comprises a gas alarm body, an alarm light is fixedly installed on the left side of the gas alarm body, mounting clamps are fixedly installed on both left and right sides of the rear end of the gas alarm body, and circular clamping grooves are provided on the opposite surfaces of the two mounting clamps, and the protective mechanism comprises a C-shaped fixing plate, and shock-absorbing springs are fixedly connected to the left and right sides of the opposite surfaces of the C-shaped fixing plate at a horizontal position, and mounting boxes are fixedly installed on the opposite ends of two pairs of shock-absorbing springs, and dampers are fixedly connected to the upper and lower ends and left and right sides of the mounting box, and the four dampers are fixedly connected to the opposite surfaces of the C-shaped fixing plate at a horizontal position at one end away from the mounting box.

[0007] A further improvement of the technical solution of the utility model is that: installation slots are provided on both sides of the front end of the installation box, the installation card plate is engaged with the installation slots, a control cabin is provided inside the installation box, a forward and reverse threaded rod is movably installed on the right side inside the control cabin, and the left end of the forward and reverse threaded rod passes through the left side of the installation box and is fixedly installed with a disassembly knob.

[0008] A further improvement of the technical solution of the utility model lies in that movable plates are threadedly installed on the opposite threaded outer walls on the left and right sides of the positive and negative threaded rods, the upper and lower sides of the two movable plates are overlapped with the upper and lower sides of the inner wall of the control cabin, and the opposite back sides of the two movable plates are fixedly installed with clamping rods, and a clamping slot hole is opened on the inner wall of the installation slot close to the control cabin, and the clamping rod passes through the clamping slot hole and is clamped with the circular clamping slot.

[0009] A further improvement of the technical solution of the utility model is that a gas sensor is arranged at the bottom end of the gas alarm body, a protective shell is fixedly installed on the side of the gas sensor, an isolation shell is fixedly connected to the bottom of the protective shell, and a filter is fixedly installed under the inner wall of the isolation shell.

[0010] A further improvement of the technical solution of the utility model is that: connecting rods are fixedly connected to the left and right sides of the inner wall of the isolation shell, and driving motors are fixedly installed at the opposite ends of the two connecting rods. The bottom end of the output shaft of the driving motor passes through the bottom of the middle end of the filter net and cleaning brush strips are fixedly installed on the left and right sides, and the tops of the two cleaning brush strips overlap the bottom of the filter net.

[0011] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0012] 1. The utility model provides a protective shell for a gas alarm. Through the cooperation between the installation box included in the C-shaped fixing plate and the installation clamping plate on the rear side of the gas alarm, the gas alarm can be quickly disassembled and assembled. At the same time, after installation, four shock-absorbing springs can effectively reduce the vibration effect on the gas alarm during underground detection, thereby improving the stability of the gas alarm during detection.

[0013] 2. The utility model provides a protective casing for a gas alarm. Through the cooperation of the protective casing of the outer wall of the gas sensor and the bottom isolation casing, dust floating in the air underground can be filtered by the filter net at the bottom of the isolation casing to avoid adhesion to the gas sensor, so that the gas sensor can perform gas detection stably and accurately, and prevent safety hazards caused by detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a rear view schematic diagram of the gas alarm body of the utility model structure;

[0016] Figure 3 It is a schematic diagram of the protection mechanism of the utility model structure;

[0017] Figure 4 It is a cross-sectional schematic diagram of the installation box of the utility model structure;

[0018] Figure 5 It is a cross-sectional schematic diagram of the protective shell and the isolation shell of the utility model structure.

[0019] In the figure: 1. Gas alarm body; 11. Gas alarm body; 111. Gas sensor; 112. Protective shell; 113. Isolation shell; 1131. Connecting rod; 1132. Drive motor; 1133. Filter; 1134. Cleaning brush strip; 12. Alarm light; 13. Mounting card plate; 131. Circular card slot; 2. Protective mechanism; 21. C-type fixing plate; 22. Shock-absorbing spring; 23. Damper; 24. Mounting box; 241. Control cabin; 2411. Positive and negative threaded rod; 2412. Disassembly knob; 2413. Moving plate; 2414. Card rod; 242. Mounting card slot; 2421. Card slot hole. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1 , Figure 2 , Figure 3As shown, the utility model provides a protective shell for a gas alarm instrument, including a gas alarm instrument body 1 and a protective mechanism 2. The gas alarm instrument body 1 includes a gas alarm instrument body 11. An alarm light 12 is fixedly installed on the left side of the gas alarm instrument body 11. When air abnormality is detected, the alarm light 12 will be used to flash an alarm. Mounting clamps 13 are fixedly installed on both sides of the rear end of the gas alarm instrument body 11. Circular clamping grooves 131 are provided on the opposite surfaces of the two mounting clamps 13. The protective mechanism 2 includes a C-shaped fixing plate 21. Shock-absorbing springs 22 are fixedly connected to the left and right sides of the opposite surfaces of the C-shaped fixing plate 21 at a horizontal position. Mounting boxes 24 are fixedly installed on the opposite ends of the two pairs of shock-absorbing springs 22. Dampers 23 are fixedly connected to the upper and lower ends and left and right sides of the mounting box 24. One end of the four dampers 23 away from the mounting box 24 is fixedly connected to the opposite surface of the C-shaped fixing plate 21 at a horizontal position. The damper 23 can keep the elasticity of the shock-absorbing spring 22 stable and avoid repeated rebound of the shock-absorbing spring 22.

[0022] When the underground environment vibrates due to drilling work, the four shock-absorbing springs 22 are connected to the installation box 24 to buffer the installation box 24 and avoid the vibration, so that the operation state of the gas alarm body 11 is more stable and not easy to fall off, which has a good anti-fall effect.

[0023] like Figure 4 As shown, both left and right sides of the front end of the installation box 24 are provided with installation slots 242, and the installation card plate 13 is clamped with the installation slots 242. A control cabin 241 is provided inside the installation box 24, and a positive and negative threaded rod 2411 is movably installed on the right side of the control cabin 241. The left end of the positive and negative threaded rod 2411 penetrates to the left side of the installation box 24 and is fixedly installed with a disassembly knob 2412. Moving plates 2413 are threadedly installed on the opposite threaded outer walls on the left and right sides of the positive and negative threaded rod 2411. The upper and lower sides of the two moving plates 2413 are overlapped with the upper and lower sides of the inner wall of the control cabin 241. The opposite backs of the two moving plates 2413 are fixedly installed with clamping rods 2414. A clamping slot hole 2421 is provided on the inner wall of the installation slot 242 close to the control cabin 241. The clamping rod 2414 penetrates the clamping slot hole 2421 and is clamped with the circular clamping slot 131.

[0024] After fixing the C-shaped fixing plate 21 on the wall, the gas alarm body 11 is inserted into the installation slot 242 opened on the front side of the installation box 24 using the installation card plate 13 on the rear side, and the circular slot 131 is aligned with the slot hole 2421. Then the disassembly and assembly knob 2412 is rotated to drive the forward and reverse threaded rod 2411 in the control cabin 241 to rotate, so that the two movable plates 2413 on the opposite threaded outer walls on the left and right sides of the forward and reverse threaded rod 2411 move to both sides, and drive the card rod 2414 to pass through the slot hole 2421 and then be inserted into the circular card slot 131 to fix the gas alarm body 11 on the front side of the installation box 24.

[0025] like Figure 5 As shown, a gas sensor 111 is provided at the bottom end of the gas alarm body 11, a protective shell 112 is fixedly installed on the side of the gas sensor 111, an isolation shell 113 is fixedly connected to the bottom of the protective shell 112, a filter screen 1133 is fixedly installed below the inner wall of the isolation shell 113, connecting rods 1131 are fixedly connected to the left and right sides of the inner wall of the isolation shell 113, and driving motors 1132 are fixedly installed at the opposite ends of the two connecting rods 1131, the bottom end of the output shaft of the driving motor 1132 passes through the lower middle end of the filter screen 1133 and cleaning brush strips 1134 are fixedly installed on the left and right sides, and the tops of the two cleaning brush strips 1134 are overlapped with the bottom of the filter screen 1133;

[0026] The gas alarm body 11 is tested using the gas sensor 111 at the bottom, and the protective shell 112 on the outer wall of the gas sensor 111 and the isolation shell 113 at the bottom can protect the gas sensor 111. At the same time, the filter 1133 at the bottom of the isolation shell 113 can prevent dust from entering without affecting the entry of air. At the same time, the driving motor 1132 is used to drive the cleaning brush strip 1134 to rotate, which can sweep away dust and floating objects attached to the bottom of the filter 1133 to prevent blockage and ensure the normal progress of the test.

[0027] The following is a detailed description of the working principle of the protective casing for the gas alarm.

[0028] like Figure 1-5As shown, after fixing the C-shaped fixing plate 21 on the wall, the gas alarm body 11 is inserted into the installation slot 242 opened on the front side of the installation box 24 using the installation card plate 13 on the rear side, and the circular slot 131 is aligned with the slot hole 2421, and then the disassembly knob 2412 is rotated to drive the positive and negative threaded rod 2411 in the control cabin 241 to rotate, so that the two movable plates 2413 on the opposite threaded outer walls on the left and right sides of the positive and negative threaded rod 2411 move to both sides, and drive the card rod 2414 to pass through the slot hole 2421 and then be inserted into the circular slot 131 to fix the gas alarm body 11 on the front side of the installation box 24. When the underground environment vibrates due to drilling work The four shock-absorbing springs 22 are connected to the installation box 24 to buffer the installation box 24 and avoid vibration. The gas alarm body 11 uses the gas sensor 111 at the bottom for detection, and the protective shell 112 on the outer wall of the gas sensor 111 and the isolation shell 113 at the bottom can protect the gas sensor 111 during detection. At the same time, the filter 1133 at the bottom of the isolation shell 113 can prevent dust from entering without affecting the entry of air. At the same time, the driving motor 1132 is used to drive the cleaning brush strip 1134 to rotate, which can sweep away the dust and floating objects attached to the bottom of the filter 1133 to prevent blockage and ensure the normal detection.

[0029] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A protective housing for a gas alarm, comprising a gas alarm body (1) and a protective mechanism (2), characterized in that: The gas alarm instrument body (1) comprises a gas alarm instrument body (11), an alarm light (12) is fixedly installed on the left side of the gas alarm instrument body (11), mounting clamps (13) are fixedly installed on both the left and right sides of the rear end of the gas alarm instrument body (11), and circular clamping grooves (131) are provided on the opposite surfaces of the two mounting clamps (13), and the protection mechanism (2) comprises a C-shaped fixed plate (21), and shock-absorbing springs (22) are fixedly connected to the left and right sides of the opposite surfaces of the C-shaped fixed plate (21) at a horizontal position, and mounting boxes (24) are fixedly installed on the opposite ends of the two pairs of shock-absorbing springs (22), and dampers (23) are fixedly connected to the upper and lower ends and the left and right sides of the mounting box (24), and the ends of the four dampers (23) away from the mounting box (24) are fixedly connected to the opposite surfaces of the C-shaped fixed plate (21) at a horizontal position.

2. The protective housing for a gas alarm according to claim 1, characterized in that: The front end of the installation box (24) is provided with installation slots (242) on both left and right sides, the installation card plate (13) is snap-connected with the installation slots (242), a control cabin (241) is provided inside the installation box (24), a forward and reverse threaded rod (2411) is movably installed on the right side inside the control cabin (241), and the left end of the forward and reverse threaded rod (2411) passes through the left side of the installation box (24) and is fixedly installed with a disassembly knob (2412).

3. The protective housing for a gas alarm according to claim 2, characterized in that: A movable plate (2413) is threadedly mounted on the opposite threaded outer walls on the left and right sides of the forward and reverse threaded rods (2411); the upper and lower sides of the two movable plates (2413) are overlapped with the upper and lower sides of the inner wall of the control cabin (241); a clamping rod (2414) is fixedly mounted on the opposite back sides of the two movable plates (2413); a clamping slot hole (2421) is opened on the inner wall of the installation clamping slot (242) close to the control cabin (241); the clamping rod (2414) passes through the clamping slot hole (2421) and is clamped with the circular clamping slot (131).

4. The protective housing for a gas alarm according to claim 1, characterized in that: A gas sensor (111) is provided at the bottom end of the gas alarm body (11), a protective shell (112) is fixedly installed on the side of the gas sensor (111), an isolation shell (113) is fixedly connected to the bottom of the protective shell (112), and a filter screen (1133) is fixedly installed below the inner wall of the isolation shell (113).

5. The protective housing for a gas alarm according to claim 4, characterized in that: Connecting rods (1131) are fixedly connected to the inner wall of the isolation shell (113) on both sides, and driving motors (1132) are fixedly installed at the opposite ends of the two connecting rods (1131). The bottom end of the output shaft of the driving motor (1132) passes through the lower part of the middle end of the filter screen (1133) and cleaning brush strips (1134) are fixedly installed on both sides, and the tops of the two cleaning brush strips (1134) overlap the bottom of the filter screen (1133).

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