Explosion-proof combustible gas detector
By designing a simplified structure and a micro motor-driven opening and closing unit, the existing explosion-proof combustible gas detector has been solved, and the problem of complex structure and inability to control gas input is achieved, which has achieved convenient maintenance and safety performance improvement of the detector.
Patent Information
- Application Number
- CN202420550446.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The existing explosion-proof combustible gas detector has a complex structure, which is inconvenient for later replacement or maintenance, and cannot be controlled based on the input amount of combustible gas, resulting in an explosion risk caused by excessive input of combustible gas.
An explosion-proof combustible gas detector including an outer guard unit, a pipe body unit, a pulling unit and an opening and closing unit is designed. The opening and closing unit driven by a micro motor can be automatically opened and closed according to the combustible gas input amount, and through The simplified disassembly and assembly structure facilitates the replacement and maintenance of detectors.
It realizes the convenient disassembly and assembly of the detector and the independent control of gas input, improves the safety performance and operational convenience of the device, and avoids the explosion hazard caused by excessive combustible gas input.
Smart Images
Figure CN222147969U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proof combustible gas detectors, in particular to an explosion-proof combustible gas detector. Background Art
[0002] At present, fires caused by combustible gases are one of the most serious types of fire hazards. When the combustible gas reaches a certain concentration range in the air or oxygen, it will explode when it encounters a fire source. Therefore, research on the detection of combustible gases has emerged. Catalytic combustible gas sensors are a more common type of detection equipment. Catalytic combustible gas sensors use the resistance change of refractory metal platinum wire after heating to measure the concentration of combustible gas. When combustible gas enters the detector, it causes an oxidation reaction (flameless combustion) on the surface of the platinum wire. The heat generated increases the temperature of the platinum wire, and the resistivity of the platinum wire changes.
[0003] Publication (Announcement) No.: CN217879115U, discloses an explosion-proof combustible gas detector, the detection component includes a sensor module, a shell, a fire barrier, a dust screen and a fixed cover, the fixed cover is provided with a vent hole and connected to one end of the shell, a dust screen is provided between the end face of one end of the shell and the fixed cover, the fire barrier is provided inside the shell, the other end of the shell is threadedly connected to the detection connecting pipe, the sensor module is fixed in the detection connecting pipe and electrically connected to the terminal board. An explosion-proof combustible gas detector adopting the above structure has an oblong hole for installation to facilitate overall installation, and the detection component is provided with a fire barrier and a dust screen to improve protection and increase service life.
[0004] In the above patent, the structure is complicated and inconvenient to operate, and it is not convenient to replace or repair the detector later. It cannot control the input according to the input amount of the combustible gas, and cannot avoid the danger caused by excessive input of combustible gas. Therefore, it is necessary to provide an explosion-proof combustible gas detector. Utility Model Content
[0005] The main purpose of the utility model is to provide an explosion-proof combustible gas detector, which can effectively solve the problems in the background technology that the structure is complex and inconvenient to operate, it is inconvenient to replace or repair the detector later, and it cannot control the input according to the input amount of the combustible gas, and cannot avoid the problem of danger caused by excessive input of combustible gas.
[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an explosion-proof combustible gas detector, comprising an outer protection unit, and a tube unit arranged on the outer surface of the outer protection unit, and also comprising a pull-out unit arranged inside the front end surface of the outer protection unit and an opening and closing unit arranged inside the bottom end of the outer protection unit;
[0007] The pull-out unit comprises an outer frame movably arranged inside the front end of the outer protection unit, and explosion-proof glass installed inside the outer frame for enclosing and observing gas detection;
[0008] The opening and closing unit comprises a micro motor installed inside the bottom end of the outer protection unit, and a sleeve sealing plate movably arranged inside the bottom end of the outer protection unit for controlling the entry of gas.
[0009] Preferably, the outer protection unit includes an explosion-proof shell, a placement groove opened on the front end surface of the explosion-proof shell, a through-slot opened on the top of the explosion-proof shell, two arc grooves opened on the inner wall surface of the through-slot, a positioning card hole opened on the inner wall surface of the arc groove, an air inlet opened on the bottom of the explosion-proof shell, and an abutment groove opened on the inner wall surface of the air inlet.
[0010] Preferably, the tube unit comprises an air inlet pipe fixedly connected to the center of the bottom of the explosion-proof housing, a ventilation pipe fixedly connected to both sides of the top of the explosion-proof housing, and a dust filter installed on the inner wall of the ventilation pipe.
[0011] Preferably, the pulling unit also includes a pull ring fixedly connected to the top of the outer frame, two positioning columns movably arranged on the front end surface of the outer frame, a limit plate fixedly connected to one end of the positioning column, and a return spring fixedly connected to one side of the limit plate.
[0012] Preferably, the opening and closing unit also includes a screw fixedly connected to the driving end of the micro motor, a threaded block threadedly connected to the outer surface of the screw, a sealing block fixedly connected to one end of the sleeve sealing plate, and a positioning block fixedly connected to one side of the sealing block.
[0013] Preferably, the outer dimensions of the outer frame are adapted to the inner dimensions of the through-slot hole, the curvature of the arc-shaped groove is adapted to the curvature of one end of the positioning column, the outer diameter of the positioning column is adapted to the inner diameter of the positioning hole, and the return spring is fixedly connected between one side of the limit plate and the inner wall of the outer frame.
[0014] Preferably, the sealing plate is sleeved on the outer surface of the screw rod, the outer dimensions of the sealing plate are larger than the inner dimensions of the air inlet, one end of the sealing plate is fixedly connected to one side of the threaded block, the sealing blocks are symmetrically arranged on both sides, and the outer dimensions of the positioning block are adapted to the inner dimensions of the abutment groove.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] 1. In the utility model, after the installation of the detector is completed, the staff pushes the outer frame downward through the pull ring, and the positioning column gradually descends along the arc groove until it reaches the bottom, and the positioning column and the positioning hole are on the same horizontal plane. After the reset spring loses the extrusion force, it elastically recovers and pops the positioning column into the interior of the positioning hole through the limit plate, so that the outer frame seals the explosion-proof shell. When the detector needs to be replaced or repaired later, a columnar rod is inserted into the interior of the positioning hole to squeeze the positioning column, and then the outer frame is pulled up by the pull ring to repair or replace the detector. The structure has a simple connection and disassembly structure, which is easy for the staff to operate and convenient for the later replacement or repair of the detector, and has good practicality.
[0017] 2. In the utility model, when the detector detects that the combustible gas input is too much, the micro motor is driven to start and drive the screw to rotate. The rotation of the screw drives the threaded block to move laterally on its surface. The movement of the threaded block drives the sleeve sealing plate to move to one side on the outer surface of the screw, so that the positioning block enters the inside of the abutment groove. The sleeve sealing plate closes the air inlet. At the same time, the sealing block can seal the connection of the abutment groove, so that the combustible gas is prohibited from entering the interior of the explosion-proof housing. The structure can be opened and closed autonomously according to the input amount of the combustible gas, avoiding the risk of explosion caused by excessive input of combustible gas, and improving the safety performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;
[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;
[0020] Figure 3 It is a partial side view internal cross-sectional structure schematic diagram of the utility model;
[0021] Figure 4 This is a schematic diagram of the explosion-proof glass connection structure of the utility model;
[0022] Figure 5 For this utility model Figure 3 The enlarged structural diagram at A in the middle;
[0023] Figure 6 For this utility model Figure 3 Enlarged structural diagram at B in the middle.
[0024] In the figure:
[0025] 100, outer protection unit; 101, explosion-proof housing; 102, placement groove; 103, through-slot groove; 104, arc groove; 105, positioning card hole; 106, air inlet; 107, abutment groove;
[0026] 200, pipe unit; 201, air intake pipe; 202, ventilation pipe; 203, dust filter;
[0027] 300, drawer unit; 301, outer frame; 302, explosion-proof glass; 303, pull ring; 304, positioning column; 305, limit plate; 306, return spring;
[0028] 400, opening and closing unit; 401, micro motor; 402, lead screw; 403, threaded block; 404, sleeve sealing plate; 405, sealing block; 406, positioning block. DETAILED DESCRIPTION
[0029] Example 1
[0030] Please refer to Figure 1 — Figure 6 The utility model is an explosion-proof combustible gas detector, comprising an outer protection unit 100, and a tube unit 200 arranged on the outer surface of the outer protection unit 100, and further comprising a pull-out unit 300 arranged inside the front end surface of the outer protection unit 100 and an opening and closing unit 400 arranged inside the bottom end of the outer protection unit 100;
[0031] The opening and closing unit 400 includes a micro motor 401 installed inside the bottom end of the outer protection unit 100, and a sleeve sealing plate 404 movably arranged inside the bottom end of the outer protection unit 100 for controlling the entry of gas.
[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the outer protection unit 100 includes an explosion-proof shell 101, a placement groove 102 opened on the front end surface of the explosion-proof shell 101, a through-slot 103 opened on the top of the explosion-proof shell 101, two arc grooves 104 opened on an inner wall surface of the through-slot 103, a positioning card hole 105 opened on the inner wall surface of the arc groove 104, an air inlet 106 opened on the bottom of the explosion-proof shell 101, and an abutment groove 107 opened on the inner wall surface of the air inlet 106. The explosion-proof shell 101 adopts special materials and has an explosion-proof effect. The placement groove 102 is provided to facilitate the disassembly and assembly of the detector, and the through-slot 103 is provided to facilitate the positioning and opening and closing of the outer frame 301.
[0033] like Figure 1 and Figure 2As shown, the tube body unit 200 includes an air inlet pipe 201 fixedly connected at the bottom center of the explosion-proof housing 101, ventilation pipes 202 fixedly connected to both sides of the top of the explosion-proof housing 101, and a dust filter 203 installed on the inner wall of the ventilation pipe 202. Gas is sent in for detection through the air inlet pipe 201. The gas inside the explosion-proof housing 101 can be ventilated and diluted by the two ventilation pipes 202. The dust filter 203 has the effect of preventing dust from entering.
[0034] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the pull-out unit 300 includes an outer frame 301 movably arranged inside the front end of the outer protection unit 100, and an explosion-proof glass 302 installed inside the outer frame 301 for enclosing and observing gas detection. The pull-out unit 300 also includes a pull ring 303 fixedly connected to the top of the outer frame 301, two positioning posts 304 movably arranged on the front end surface of the outer frame 301, a limit plate 305 fixedly connected to one end of the positioning post 304, and a return spring 306 fixedly connected to one side of the limit plate 305. The outer size of the outer frame 301 is adapted to the inner size of the through-slot 103, the curvature of the arc groove 104 is adapted to the curvature of one end of the positioning post 304, the outer diameter of the positioning post 304 is adapted to the inner diameter of the positioning hole 105, and the return spring 306 is fixedly connected between one side of the limit plate 305 and the inner wall of the outer frame 301.
[0035] Working principle: After the installation of the detector is completed, the staff pushes the outer frame 301 downward through the pull ring 303, and the positioning column 304 gradually descends along the arc groove 104, and after reaching the bottom, the positioning column 304 and the positioning hole 105 are on the same horizontal plane. After the reset spring 306 loses the extrusion force, it elastically recovers and pops the positioning column 304 into the interior of the positioning hole 105 through the limit plate 305, so that the outer frame 301 closes the explosion-proof shell 101. When the detector needs to be replaced or repaired later, a columnar rod is inserted into the interior of the positioning hole 105 to squeeze the positioning column 304, and then the outer frame 301 is pulled up through the pull ring 303 to repair or replace the detector. The structure has a simple connection and disassembly structure, which is easy for the staff to operate and convenient for the later replacement or repair of the detector, and has good practicality.
[0036] Example 2
[0037] Please refer to Figure 1 — Figure 6As shown, the utility model is an explosion-proof combustible gas detector, comprising an outer protection unit 100, and a tube unit 200 arranged on the outer surface of the outer protection unit 100, and further comprising a pull-out unit 300 arranged inside the front end surface of the outer protection unit 100 and an opening and closing unit 400 arranged inside the bottom end of the outer protection unit 100;
[0038] The drawer unit 300 includes an outer frame 301 movably disposed inside the front end of the outer protection unit 100 , and an explosion-proof glass 302 installed inside the outer frame 301 for enclosing and observing gas detection.
[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the outer protection unit 100 includes an explosion-proof shell 101, a placement groove 102 opened on the front end surface of the explosion-proof shell 101, a through-slot 103 opened on the top of the explosion-proof shell 101, two arc grooves 104 opened on an inner wall surface of the through-slot 103, a positioning card hole 105 opened on the inner wall surface of the arc groove 104, an air inlet 106 opened on the bottom of the explosion-proof shell 101, and an abutment groove 107 opened on the inner wall surface of the air inlet 106. The explosion-proof shell 101 adopts special materials and has an explosion-proof effect. The placement groove 102 is provided to facilitate the disassembly and assembly of the detector, and the through-slot 103 is provided to facilitate the positioning and opening and closing of the outer frame 301.
[0040] like Figure 1 and Figure 2 As shown, the tube body unit 200 includes an air inlet pipe 201 fixedly connected at the bottom center of the explosion-proof housing 101, ventilation pipes 202 fixedly connected to both sides of the top of the explosion-proof housing 101, and a dust filter 203 installed on the inner wall of the ventilation pipe 202. Gas is sent in for detection through the air inlet pipe 201. The gas inside the explosion-proof housing 101 can be ventilated and diluted by the two ventilation pipes 202. The dust filter 203 has the effect of preventing dust from entering.
[0041] like Figure 3 and Figure 6As shown, the opening and closing unit 400 includes a micro motor 401 installed inside the bottom end of the outer protective unit 100, and a sleeve sealing plate 404 movably arranged inside the bottom end of the outer protective unit 100 for controlling the gas entry. The opening and closing unit 400 also includes a screw 402 fixedly connected to the driving end of the micro motor 401, a threaded block 403 threadedly connected to the outer surface of the screw 402, a sealing block 405 fixedly connected to one end of the sleeve sealing plate 404, and a positioning block 406 fixedly connected to one side of the sealing block 405. The sleeve sealing plate 404 is sleeved on the outer surface of the screw 402, and the outer size of the sleeve sealing plate 404 is larger than the inner size of the air inlet 106. One end of the sleeve sealing plate 404 is fixedly connected to one side of the threaded block 403. The sealing blocks 405 are symmetrically arranged on both sides, and the outer size of the positioning block 406 is compatible with the inner size of the abutment groove 107.
[0042] Working principle: When the detector detects that the combustible gas input is too much, the micro motor 401 is driven to start and drive the screw 402 to rotate. The rotation of the screw 402 drives the threaded block 403 to move laterally on its surface. The movement of the threaded block 403 drives the sealing plate 404 to move to one side on the outer surface of the screw 402, so that the positioning block 406 enters the inside of the abutment groove 107, and the sealing plate 404 closes the air inlet 106. At the same time, the sealing block 405 is set to seal the connection of the abutment groove 107, so that the combustible gas is prohibited from entering the interior of the explosion-proof housing 101. The structure can be opened and closed autonomously according to the input amount of the combustible gas, avoiding the risk of explosion caused by excessive input of combustible gas, thereby improving the safety performance of the device.
Claims
1. An explosion-proof combustible gas detector, comprising an outer protection unit (100), and a tube unit (200) arranged on the outer surface of the outer protection unit (100), characterized in that: It also includes a drawing unit (300) arranged inside the front end surface of the outer protection unit (100) and an opening and closing unit (400) arranged inside the bottom end of the outer protection unit (100); The pulling unit (300) comprises an outer frame (301) movably arranged inside the front end of the outer protection unit (100), and explosion-proof glass (302) installed inside the outer frame (301) for enclosing and observing gas detection; The opening and closing unit (400) comprises a micro motor (401) installed inside the bottom end of the outer protection unit (100), and a sealing plate (404) movably arranged inside the bottom end of the outer protection unit (100) for controlling the entry of gas.
2. The explosion-proof combustible gas detector according to claim 1, characterized in that: The outer protection unit (100) comprises an explosion-proof housing (101), a placement groove (102) provided on the front end surface of the explosion-proof housing (101), a through-slot (103) provided on the top of the explosion-proof housing (101), two arc-shaped grooves (104) provided on an inner wall surface of the through-slot (103), a positioning clamping hole (105) provided on the inner wall surface of the arc-shaped groove (104), an air inlet (106) provided on the bottom of the explosion-proof housing (101), and an abutment groove (107) provided on the inner wall surface of the air inlet (106).
3. The explosion-proof combustible gas detector according to claim 2, characterized in that: The tube unit (200) comprises an air inlet pipe (201) fixedly connected to the center of the bottom of the explosion-proof housing (101), a ventilation pipe (202) fixedly connected to both sides of the top of the explosion-proof housing (101), and a dust filter (203) installed on the inner wall of the ventilation pipe (202).
4. The explosion-proof combustible gas detector according to claim 2, characterized in that: The pulling unit (300) further comprises a pull ring (303) fixedly connected to the top of the outer frame (301), two positioning posts (304) movably arranged on the front end surface of the outer frame (301), a limit plate (305) fixedly connected to one end of the positioning post (304), and a return spring (306) fixedly connected to one side of the limit plate (305).
5. The explosion-proof combustible gas detector according to claim 2, characterized in that: The opening and closing unit (400) further comprises a screw rod (402) fixedly connected to the driving end of the micro motor (401), a threaded block (403) threadedly connected to the outer surface of the screw rod (402), a sealing block (405) fixedly connected to one end of the sleeve sealing plate (404), and a positioning block (406) fixedly connected to one side of the sealing block (405).
6. The explosion-proof combustible gas detector according to claim 4, characterized in that: The outer dimensions of the outer frame (301) are matched with the inner dimensions of the through-slot (103); the curvature of the arc-shaped groove (104) is matched with the curvature of one end of the positioning clamping column (304); the outer diameter of the positioning clamping column (304) is matched with the inner diameter of the positioning clamping hole (105); and the return spring (306) is fixedly connected between one side of the limiting plate (305) and the inner wall of the outer frame (301).
7. The explosion-proof combustible gas detector according to claim 5, characterized in that: The sleeve sealing plate (404) is sleeved on the outer surface of the screw rod (402), the outer dimensions of the sleeve sealing plate (404) are larger than the inner dimensions of the air inlet (106), one end of the sleeve sealing plate (404) is fixedly connected to one side of the threaded block (403), the sealing blocks (405) are symmetrically arranged on both sides, and the outer dimensions of the positioning block (406) are matched with the inner dimensions of the abutting groove (107).