Air-breathing smoke-sensing fire detector capable of working at low temperature
By setting up a heating system and filtering device in the suction-type pyrotechnic detector, the problem that the equipment cannot work normally in an extremely low temperature environment is solved, the equipment can operate normally at an extremely low temperature and the filtration of foreign objects outside is expanded, and the scope of application of the equipment is expanded.
Patent Information
- Application Number
- CN202421282779.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The existing aspirated pyrotechnic detectors cannot work properly in extremely low temperature environments, which limits their scope of application.
By setting a fixed cover, bolt, fan, electric heating pipe, fixed pipe and connecting pipe in the suction-type pyrotechnic detector, the gas is heated by using the fan and electric heating pipes to ensure that the detector can work normally in an extremely low temperature environment, and prevent external foreign objects from entering through the partition net, clamp rod, spring and control switch.
It realizes the normal operation of the aspirated pyrotechnic detector in an extremely low temperature environment, avoids the problem of gas frost and blockage, and effectively filters and prevents external foreign objects from entering, extending the scope of application of the equipment.
Smart Images
Figure CN222801238U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aspirating smoke fire detectors, in particular to an aspirating smoke fire detector capable of operating at low temperatures. Background Art
[0002] The aspirating smoke fire detector uses a sampling network to suck the air in the protected area into the detector for analysis, thereby providing early warning of fire. The aspirating smoke detector is mainly composed of an aspirating pump, a filter, a laser detection chamber, a control circuit, a display circuit, etc. When the device is used, the aspirating pump continuously collects air samples from the protected area through the sampling network and puts them into the detector. Then the air sample passes through the filter assembly to filter out dust particles and enters the laser detection chamber. In the laser detection chamber, smoke particles scatter the laser, and the emitted light causes a highly sensitive optical receiver to generate a signal. The control circuit completes the photoelectric conversion to realize smoke detection. In the process of using the aspirating smoke fire detector, due to the limited operating temperature range of the aspirating smoke fire detector, the aspirating smoke fire detector cannot be used in some extremely low temperature environments, which will reduce the scope of application of the aspirating smoke fire detector. Therefore, in view of the above problems, an aspirating smoke fire detector that can work at low temperatures is proposed. Utility Model Content
[0003] The technical problem to be solved by the utility model overcomes the existing defects and can effectively solve the problems in the background technology.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A suction type smoke fire detector capable of operating at low temperatures comprises a fixed cover, a shielding cover is hingedly connected to the front end of the fixed cover, a suction type smoke fire detector is arranged on the inner side of the fixed cover, a controller is fixedly connected to the top inner side of the fixed cover, an air inlet pipe end of the suction type smoke fire detector and an air outlet pipe end of the suction type smoke fire detector are both connected with connecting pipes, a fixing frame is fixedly connected to the bottom end of the fixed cover, the connecting pipe passes through the fixed cover, and the connecting pipe is slidably connected to the fixed cover and the fixing frame, a fan is fixedly connected to the inner left end of the fixing frame via a connecting rod, an electric heating pipe is fixedly connected to the inner right end of the fixing frame via a connecting rod, and fixing pipes are arranged on both left and right ends of the fixing frame.
[0006] As a further improvement of the utility model, a positioning block is fixedly connected to the outside of the aspirating smoke fire detector, and the positioning block is in contact with the fixed cover, and a bolt that penetrates the fixed cover is spirally connected to the outside of the fixed cover, and the bolt is spirally connected to the positioning block.
[0007] As a further improvement of the utility model, one end of the fixed tube is connected to the fixed cover, the other end of the fixed tube is connected to the fixed frame, and the bottom end of the connecting tube is located at the top of the fixed tube, and the fixed tube is made of copper.
[0008] As a further improvement of the present invention, a partition net is provided at the lower left inner side of the fixing frame, and the partition net is slidably connected to the fixing frame.
[0009] As a further improvement of the utility model, the right end of the partition net is snap-connected with a clamping rod, and the clamping rod is slidably connected to the fixed frame, the bottom end of the clamping rod is fixedly connected with a fixed block that passes through the fixed frame, and the fixed block is slidably connected to the fixed frame, the right end of the clamping rod is fixedly connected with a spring, and the other end of the spring is fixedly connected to the fixed frame.
[0010] As a further improvement of the present invention, a control switch is provided on the left side of the bottom end of the clamping rod, and the control switch is fixedly connected to the clamping rod, and the control switch is in contact with the partition net.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. An aspirating smoke fire detector capable of operating at low temperature. By means of a fixed cover, bolts, a fan, an electric heating pipe, a fixed pipe and a connecting pipe, when the device is used in some extremely low temperature environments, the aspirating smoke fire detector is fixed in the fixed cover by a spiral connection between the bolts and the outer positioning block of the aspirating smoke fire detector, and then the device is started by a controller. At this time, the fan will draw the gas in the fixed cover through the fixed pipe on one side to heat it through the electric heating pipe, and then re-discharge it into the fixed cover through the fixed pipe on the other side. At this time, the aspirating pump in the smoke fire detector will extract external gas through the connecting pipe on the left side to heat it through the fixed pipe on the left side, and then discharge it through the connecting pipe on the right side to blow it to the fixed pipe on the right side. By fixing the smoke fire detector in the fixed cover and then heating the gas in the fixed cover, it is ensured that the smoke fire detector is always in a temperature environment where it can work normally. By making the gas extracted and discharged by the smoke fire detector blow to the fixed pipe, it is also avoided that the bottom of the connecting pipe connected to the smoke fire detector is blocked by frost, thereby ensuring the normal use of the device in an extremely low temperature environment and increasing the scope of application of the device.
[0013] 2. An aspirating smoke fire detector capable of operating at low temperatures, which has a partition net, a clamping rod, a spring and a control switch. During the process of using the device for smoke detection, a partition net is set at the bottom of the left connecting pipe, and the clamping rod is clamped together with the partition net under the elastic force of the spring to further position the partition net. In the process of smoke detection by the device, larger floating foreign objects from the outside can be filtered out, thereby preventing larger floating foreign objects from the outside from entering the device and causing blockage inside the smoke fire detector, thereby ensuring the normal use of the smoke fire detector. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.
[0015] Figure 1 The utility model is a schematic diagram of the overall structure of an aspirating smoke fire detector capable of operating at low temperatures.
[0016] Figure 2 The utility model is a cross-sectional structural schematic diagram of an aspirating smoke fire detector capable of operating at low temperature.
[0017] Figure 3 The utility model is a schematic diagram of the overall structure of a fixed tube of an aspirating smoke fire detector capable of operating at low temperatures.
[0018] In the figure: 1. fixed cover; 2. shielding cover; 3. aspirating smoke detector; 4. controller; 5. positioning block; 6. bolt; 7. connecting pipe; 8. fixing bracket; 9. fan; 10. electric heating pipe; 11. fixing pipe; 12. partition net; 13. clamping rod; 14. fixing block; 15. spring; 16. control switch. DETAILED DESCRIPTION
[0019] The utility model is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and cannot be understood as limitations on this patent. In order to better illustrate the specific implementation methods of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific implementation methods in the utility model, all other specific implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0020] Example 1
[0021] like Figure 1-3As shown, an aspirating smoke fire detector capable of operating at low temperatures comprises a fixed cover 1, a shielding cover 2 is hingedly connected to the front end of the fixed cover 1, an aspirating smoke fire detector 3 is arranged on the inner side of the fixed cover 1, a controller 4 is fixedly connected to the top inner side of the fixed cover 1, an air inlet pipe end of the aspirating smoke fire detector 3 and an air outlet pipe end of the aspirating smoke fire detector 3 are both connected with a connecting pipe 7, a fixing frame 8 is fixedly connected to the bottom end of the fixed cover 1, the connecting pipe 7 passes through the fixed cover 1, and the connecting pipe 7 is slidably connected to the fixed cover 1 and the fixing frame 8, a fan 9 is fixedly connected to the inner left end of the fixing frame 8 by a connecting rod, an electric heating pipe 10 is fixedly connected to the inner right end of the fixing frame 8 by a connecting rod, and fixing pipes 11 are arranged on both left and right ends of the fixing frame 8.
[0022] Example 2
[0023] like Figure 1-2 As shown, in order to solve the problem that it is inconvenient to fix the aspirating smoke fire detector 3 in the fixed cover 1, a positioning block 5 is fixedly connected to the outside of the aspirating smoke fire detector 3, and the positioning block 5 is in contact with the fixed cover 1, and a bolt 6 that penetrates the fixed cover 1 is spirally connected to the outside of the fixed cover 1, and the bolt 6 is spirally connected to the positioning block 5. After the aspirating smoke fire detector 3 is placed in the fixed cover 1, the bolt 6 is spirally connected to the positioning block 5 on the outside of the aspirating smoke fire detector 3 by rotating the bolt 6, which facilitates the fixing of the aspirating smoke fire detector 3 in the fixed cover 1.
[0024] Example 3
[0025] like Figure 1-3 As shown, in order to solve the problem that the bottom of the connecting pipe 7 is easily frosted and causes blockage when the aspirating smoke fire detector 3 extracts gas, one end of the fixed pipe 11 is connected to the fixed cover 1, and the other end of the fixed pipe 11 is connected to the fixed frame 8, and the bottom end of the connecting pipe 7 is located at the top of the fixed pipe 11. The fixed pipe 11 is made of copper. When the aspirating smoke fire detector 3 extracts gas, the gas is blown to the copper fixed pipe 11 that flows through the heated gas inside, so that the extracted gas is further heated, which can prevent the bottom of the connecting pipe 7 from frosting and causing blockage.
[0026] Example 4
[0027] like Figure 2 As shown, in order to solve the problem of inconvenience in blocking larger floating foreign objects from the outside, a partition net 12 is provided at the lower left inner side of the fixed frame 8, and the partition net 12 is slidably connected to the fixed frame 8. By providing the partition net 12 at the bottom of the connecting pipe 7 connected to the air inlet of the suction type smoke fire detector 3, it is convenient to block larger floating foreign objects from the outside.
[0028] Example 5
[0029] like Figure 2 As shown, in order to solve the problem of being inconvenient to remove the partition net 12 for cleaning, the partition net 12 is snap-connected with a clamping rod 13 at the right end, and the clamping rod 13 is slidably connected to the fixed frame 8, and the bottom end of the clamping rod 13 is fixedly connected with a fixed block 14 that penetrates the fixed frame 8, and the fixed block 14 is slidably connected to the fixed frame 8, and the right end of the clamping rod 13 is fixedly connected with a spring 15, and the other end of the spring 15 is fixedly connected to the fixed frame 8. The clamping rod 13 is pushed by the fixed block 14 to compress the spring 15, and at the same time, it is disengaged from the partition net 12, which facilitates the removal of the partition net 12 for cleaning.
[0030] Example 6
[0031] like Figure 2 As shown, in order to solve the problem that it is inconvenient to remind the staff when the partition net 12 is blocked by large floating foreign objects and the wind resistance increases, a control switch 16 is provided on the left side of the bottom end of the card rod 13, and the control switch 16 is fixedly connected to the card rod 13. The control switch 16 is in contact with the partition net 12. When the partition net 12 is blocked by large floating foreign objects and the wind resistance increases, the control switch 16 is triggered by the partition net 12 sliding up, which facilitates uploading the alarm signal to the control terminal to remind the staff.
[0032] In this embodiment, when the device is used in some extremely low temperature environments, the aspirating smoke fire detector 3 is placed in the fixed cover 1, and the connecting pipe 7 connected to the aspirating smoke fire detector 3 passes through the fixed cover 1 and is inserted into the fixing frame 8, and then the aspirating smoke fire detector 3 is fixed in the fixed cover 1 through the screw connection of the bolt 6 and the outer positioning block 5 of the aspirating smoke fire detector 3, and then the device is started by the controller 4. At this time, the fan 9 will draw the gas in the fixed cover 1 through the copper fixed pipe 11 on the left side to heat it through the electric heating pipe 10, and then discharge it back to the fixed cover 1 through the fixed pipe 11 on the other side, thereby ensuring that the smoke fire detector 3 is always in a temperature environment where it can work normally. At this time, the suction pump in the smoke fire detector 3 will extract external gas through the connecting pipe 7 on the left side, filter larger floating foreign matter through the partition net 12, and then pass through the copper fixed pipe 11 on the left side. The copper fixed tube 11 is heated and then drawn into the suction type smoke fire detector 3 for smoke detection, and finally discharged through the connecting tube 7 on the right and blown to the fixed tube 11 on the right. At this time, the gas extracted and discharged by the smoke fire detector 3 is blown to the copper fixed tube 11 through which the heated gas flows, thereby avoiding the phenomenon of frost and blockage at the bottom of the connecting tube 7 connected to the smoke fire detector 3, thereby ensuring the normal use of the device in an extremely low temperature environment. During the use of the device, when the bottom of the partition net 12 is blocked by a large floating foreign object, the control switch 16 is triggered by sliding up after the partition net 12 is subjected to increased wind pressure, and an alarm signal is further uploaded to the control terminal, so as to facilitate the staff to remove the floating foreign objects at the bottom of the partition net 12. At this time, the fixing block 14 pushes the clamping rod 13 to compress the spring 15, and at the same time disengages from the partition net 12, so as to facilitate the removal of the partition net 12 for cleaning.
[0033] The above is a preferred implementation mode of the utility model. The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Technical personnel in this industry should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. An aspirating smoke detector capable of operating at low temperatures, comprising a fixed cover (1), characterized in that: The front end of the fixed cover (1) is hingedly connected to a shielding cover (2); an aspirating smoke fire detector (3) is provided inside the fixed cover (1); a controller (4) is fixedly connected to the top of the inner side of the fixed cover (1); an air inlet pipe end of the aspirating smoke fire detector (3) and an air outlet pipe end of the aspirating smoke fire detector (3) are both connected to a connecting pipe (7); a fixing frame (8) is fixedly connected to the bottom end of the fixed cover (1); the connecting pipe (7) passes through the fixed cover (1), and the connecting pipe (7) is slidably connected to the fixed cover (1) and the fixing frame (8); a fan (9) is fixedly connected to the inner left end of the fixing frame (8) via a connecting rod; an electric heating pipe (10) is fixedly connected to the inner right end of the fixing frame (8) via a connecting rod; and fixing pipes (11) are provided at both left and right ends of the fixing frame (8).
2. The low-temperature-operating aspirating smoke detector according to claim 1, characterized in that: A positioning block (5) is fixedly connected to the outside of the aspirating smoke fire detector (3), and the positioning block (5) is in contact with the fixing cover (1). A bolt (6) penetrating the fixing cover (1) is spirally connected to the outside of the fixing cover (1), and the bolt (6) is spirally connected to the positioning block (5).
3. The low-temperature-operating aspirating smoke detector according to claim 1, characterized in that: One end of the fixed tube (11) is in communication with the fixed cover (1), the other end of the fixed tube (11) is in communication with the fixed frame (8), and the bottom end of the connecting tube (7) is located at the top of the fixed tube (11), and the fixed tube (11) is made of copper.
4. The low-temperature-operating aspirating smoke detector according to claim 1, characterized in that: A partition net (12) is provided at the lower left side of the inner side of the fixing frame (8), and the partition net (12) is slidably connected to the fixing frame (8).
5. The low-temperature-operating aspirating smoke detector according to claim 4, characterized in that: The right end of the partition net (12) is connected with a clamping rod (13), and the clamping rod (13) is slidably connected to the fixed frame (8). The bottom end of the clamping rod (13) is fixedly connected with a fixed block (14) that penetrates the fixed frame (8), and the fixed block (14) is slidably connected to the fixed frame (8). The right end of the clamping rod (13) is fixedly connected with a spring (15), and the other end of the spring (15) is fixedly connected to the fixed frame (8).
6. The low-temperature-operating aspirating smoke detector according to claim 5, characterized in that: A control switch (16) is provided on the left side of the bottom end of the clamping rod (13), and the control switch (16) is fixedly connected to the clamping rod (13), and the control switch (16) is in contact with the partition net (12).