Large storage tank temperature sensing fire detection alarm

Abstract

The utility model discloses a large-scale storage tank temperature sensing fire hazard detection alarm comprising a mounting box, a temperature sensor arranged in the mounting box, a box cover arranged at the top end of the mounting box, a battery arranged in the mounting box, and a leakage-proof assembly arranged in the mounting box, the leakage-proof assembly comprises a leakage-proof buckle, a clamping groove is arranged on the inner wall of the mounting box, and the clamping groove is provided with a clamping groove. A mounting seat is arranged at the bottom of the leakage-proof buckle, and a limiting piece is arranged at the top end of the mounting seat; by utilizing the design of the mounting box, the box cover, the battery and the leakage-proof assembly, when the battery is not placed in the mounting groove of the mounting seat or the battery is not placed in place in the mounting groove, the battery cannot completely extrude the leakage-proof buckle, so that the leakage-proof buckle cannot be completely and flatly attached to the clamping groove, and the top of the leakage-proof buckle can protrude to abut against the box cover; and the mounting box and the box cover cannot be completely mounted, so that a prompting effect is achieved for a worker to inspect battery mounting.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature measuring probe technical field, especially large -scale storage tank temperature sensing fire detection alarm. BACKGROUND

[0002] The oil tank is one of the important media for current petroleum storage, adopts the secondary sealing technology on the top of the oil tank, but is not completely sealed, there is a small amount of chemical liquid and gas leaking out from the sealing ring, these leaked gas is easy to cause fire under the natural conditions such as high temperature of the sun, lightning, therefore, the detection of fire is particularly important, in the detection device, large -scale storage tank temperature sensing fire detection alarm is used to carry out continuous monitoring, but in the working of large -scale storage tank temperature sensing fire detection alarm, the installation of the battery is needed, and the power is provided for the continuous work of the probe, however, the oil tank needs to install multiple probes, so in the process of battery installation, the situation of battery not installed in place or battery missing may occur, so after the probe is installed on the oil tank, the probe cannot continue to work or work due to battery falling off or not being installed, then the probe needs to be disassembled and reinstalled, which is very inconvenient. UTILITY MODEL CONTENTS

[0003] The utility model discloses a large -scale storage tank temperature sensing fire detection alarm to solve the problem in the background art.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: large -scale storage tank temperature sensing fire detection alarm, including installation box, the inside temperature sensor for temperature monitoring is arranged in the installation box, the top of installation box is provided with the box cover for installation box closure, the inside battery for continuous power supply is arranged in the installation box, the inside leakproof assembly for preventing battery missing is arranged in the installation box, the leakproof buckle is included in the leakproof assembly, the inner wall of installation box is provided with the clamping groove for the fit of leakproof buckle, the bottom of leakproof buckle is provided with the mounting seat for the installation of leakproof buckle, the top of mounting seat is provided with the limiting piece for limiting the rotation angle of leakproof buckle.

[0005] Preferably, the recess for installing the leakproof buckle is formed on one side of the top of the mounting seat, the bottom of the leakproof buckle is rotatably connected with the recess, the mounting groove for placing the battery is formed on the other side of the top of the mounting seat, and the elastic block is fixedly connected to one side of the leakproof buckle.

[0006] Preferably, the limiting piece includes a limiting block, and the bottom end of the limiting block is fixedly connected to one side of the top of the mounting seat.

[0007] Preferably, the inside of the installation box is provided with a main control circuit board for controlling the temperature sensor, and the output end of the temperature sensor is electrically connected with the input end of the main control circuit board.

[0008] Preferably, the front of the installation box is provided with a communication antenna for wireless transmission of data, and the input end of the communication antenna is electrically connected with the output end of the master control circuit board.

[0009] Preferably, one side of the installation box is provided with a buzzer for sound alarm, and the input end of the buzzer is electrically connected with the output end of the master control circuit board.

[0010] Preferably, one side of the installation box is provided with a self-checking button for self-checking starting control, and the output end of the self-checking button is electrically connected with the input end of the master control circuit board.

[0011] Preferably, the installation box is externally provided with a fixedly connected installation base, and the installation base is used for installing the installation box at the secondary sealing position of the storage tank.

[0012] The technical effects and advantages of the utility model are as follows:

[0013] The utility model discloses a design of installation box, box cover, battery and leakage prevention assembly, when the battery is not placed in the installation groove of the installation seat or the battery is not placed in place in the installation groove, the battery cannot completely extrude the leakage prevention buckle, the leakage prevention buckle cannot completely and flatly fit with the clamping groove, and the top of the leakage prevention buckle will be protruding, the box cover is pressed from the back, the installation box and the box cover cannot be completely installed, and the staff is prompted to check the battery installation. DRAWINGS

[0014] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model.

[0015] Figure 2 It is the overhead section structure schematic diagram of the utility model.

[0016] Figure 3 It is the three-dimensional structure schematic diagram of the leakage prevention assembly of the utility model.

[0017] Figure 4 It is the front view structure schematic diagram of the leakage prevention assembly of the utility model.

[0018] Figure 5 It is the voltage monitoring circuit principle diagram of the utility model.

[0019] Figure 6 It is the communication antenna circuit principle diagram of the utility model.

[0020] Figure 7 It is the temperature sensor circuit principle diagram of the utility model.

[0021] Figure 8 It is the structure schematic diagram of the placing type installation support of the utility model.

[0022] Figure: 1, installation box; 2, box cover; 3, battery; 4, leakage prevention assembly; 41, leakage prevention buckle; 42, mounting seat; 43, limiting block; 44, elastic block; 5, temperature sensor; 6, main control circuit board; 7, communication antenna; 8, buzzer; 9, self-check button; 10, mounting base. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] The utility model provides a large -scale storage tank temperature sensing fire detection alarm as shown in Figures 1-4 And Figure 8 Large -scale storage tank temperature sensing fire detection alarm, including installation box 1, the inside of installation box 1 is provided with temperature sensor 5 for temperature monitoring, installation box 1 is provided with box cover 2 for installation box 1 closed, installation box 1 is provided with battery 3 for continuously providing power in the inside, installation box 1 is provided with leakage prevention assembly 4 for preventing battery 3 leakage in the inside, leakage prevention assembly 4 includes leakage prevention buckle 41, the inner wall of installation box 1 is provided with the clamping groove for the adhesion of leakage prevention buckle 41, the bottom of leakage prevention buckle 41 is provided with mounting seat 42 for the installation of leakage prevention buckle 41, the top of mounting seat 42 is provided with limiting piece for limiting the rotation angle of leakage prevention buckle 41.

[0025] Specifically, installation box 1 and box cover 2 meet the requirements of intrinsic safety explosion protection and IP66 level protection grade, except temperature sensor 5 and communication antenna 7, the whole circuit is sealed, and O-ring seal is installed between installation box 1 and box cover 2, which is filled with high-temperature resistant resin, installation box 1 and box cover 2 adopt cast aluminum shell, installation box 1 and box cover 2 are usually treated by spraying to enhance the surface corrosion resistance, suitable for corrosive environment such as petrochemical industry and offshore platform, installation box 1 and box cover 2 are fixedly connected by bolts, four corners of the top of installation box 1 are provided with threaded grooves, four corners of the top of box cover 2 are provided with threaded holes, the bolts are threaded into the threaded holes and threaded grooves to fix installation box 1 and box cover 2, the outer wall of box cover 2 is fixedly connected with an anti-collision frame, which can protect the use performance of the metal sleeve and temperature sensor 5 during transportation and in extreme conditions, so that the whole alarm can be directly packed and transported without filling protection, greatly improving the transportation efficiency.

[0026] Specifically, one side of the top end of the mounting seat 42 is provided with a groove for installing the leakage-proof buckle 41, the bottom of the leakage-proof buckle 41 is rotatably connected with the groove, the other side of the top of the mounting seat 42 is provided with a mounting groove for placing the battery 3, and the limiting member comprises a limiting block 43, the bottom end of the limiting block 43 is fixedly connected with one side of the top end of the mounting seat 42, and one side of the leakage-proof buckle 41 is fixedly connected with an elastic block 44.

[0027] Further, the mounting seat 42 is fixedly connected with the bottom end of the inner wall of the mounting box 1 through a bolt, the inside of the groove is provided with a round rod, the two ends of the round rod are fixedly connected with the two sides of the inner wall of the groove respectively, the leakage-proof buckle 41 is in an inverted L shape, the bottom of the leakage-proof buckle 41 is provided with a circular through groove, the round rod is inserted in the circular through groove, so that the leakage-proof buckle 41 and the top of the mounting seat 42 are hingedly connected, the limiting block 43 and the mounting seat 42 are integrally cast, when the leakage-proof buckle 41 is not pressed, the leakage-proof buckle 41 will rotate under the action of the elastic force of the elastic block 44, the top of the limiting block 43 will abut against the bottom of the leakage-proof buckle 41, so as to limit the angle of rotation of the leakage-proof buckle 41, and the leakage-proof buckle 41 is in a state of Figure 4 When the battery 3 is correctly installed in the mounting groove, at this time, the side of the battery 3 presses one side of the leakage-proof buckle 41, so that the vertical plate of the leakage-proof buckle 41 is arranged perpendicularly and is attached to the clamping groove, so that the mounting box 1 and the box cover 2 can be fixed by the bolt, when the battery 3 is not placed or is not correctly placed, at this time, the pressing force of the battery 3 on the vertical plate of the leakage-proof buckle 41 is insufficient, the elastic block 44 makes the leakage-proof buckle 41 in a skew state, the top of the leakage-proof buckle 41 protrudes, and the protruding edge portion can be clamped to the box cover 2, so that the box cover 2 cannot be completely installed, thereby realizing the reminding effect of the leakage of the battery 3 or the incorrect installation of the battery 3, the battery 3 is a sulfuryl chloride battery (referred to as a lithium sulfuryl battery), which is more suitable for the explosion-proof field due to its special chemical properties and the fact that the filler is a non-combustible substance with low activity and can work at a very high temperature. Compared with the traditional lithium battery which will change sharply and may explode due to strong activity in a high-temperature state, the annual self-discharge current is less than 1%, the storage life can reach more than 10 years, and it can even work within-50-150 DEG C.

[0028] Specifically, the inside of the mounting box 1 is provided with a main control circuit board 6 for controlling a temperature sensor 5, and the output end of the temperature sensor 5 is electrically connected with the input end of the main control circuit board 6.

[0029] Furthermore, temperature sensor 5 uses a PT1000 resistance temperature detector (RTD) with a range of -20 to 150 degrees Celsius. After voltage division by the battery via a resistor divider circuit and a low-voltage rail-to-rail operational amplifier, the voltage is connected to the AD port of the main control circuit board 6 for numerical conversion. The power supply status of the resistor divider circuit is controlled by the microcontroller's GPIO port, ensuring that the microcontroller does not consume power when in sleep mode. During operation, the microcontroller pins provide a 3.0V voltage. After filtering, the voltage forms a voltage divider across the 0.1% precision resistor and the external PT1000. The current PT1000 resistance value can be determined using the voltage ratio, thereby further calculating the current temperature value. The overall design of the main control circuit board 6 is based on a low-power mode operating with periodic pulse current. When not in use, the circuit is in sleep mode with a sleep current of less than or equal to 6uA. It only wakes up from sleep mode and enters working mode when sampling or data transmission is required. In working mode, the voltage does not exceed 3.6V, and the maximum instantaneous transmit current is only 130mA. Figure 7 The circuit diagram of temperature sensor 5 shows that temperature sensor 5 is protected by a metal sleeve, and the sleeve is filled with high-performance thermally conductive silicone containing ceramic and metal fillers to ensure the thermal conductivity between the metal sleeve and temperature sensor 5. This type of thermally conductive silicone can work normally in a temperature range of -60℃ to 250℃, and the extreme short-term withstand temperature can reach 300℃, which can meet the needs of extreme conditions. The outer wall of the metal sleeve is threaded, and the bottom end of the cover 2 is threaded through groove. By inserting the metal sleeve thread into the threaded through groove, the metal sleeve and the cover 2 are fixedly connected by threads.

[0030] Specifically, the front of the mounting box 1 is provided with a communication antenna 7 for wireless data transmission, and the input end of the communication antenna 7 is electrically connected to the output end of the main control circuit board 6.

[0031] Furthermore, communication antenna 7 is derived from the LoRa wireless communication module, which uses the RA02 model module. Based on the SX1278 chip, it supports LoRa, FSK, GFSK, MSK, GMSK, and OOK modulation schemes, boasts an ultra-high receiving sensitivity as low as -141dBm, and an unobstructed line-of-sight range of up to 2KM. The microcontroller exchanges data with the RA02 module via the SPI interface. According to the built-in protocol instructions of the SX1278 chip, it manages the RA02 module's data transmission and reception, frequency adjustment, power settings, etc. See the relevant interfaces for details. Figure 6 .

[0032] Specifically, a buzzer 8 for sound alarm is provided on one side of the mounting box 1, and the input terminal of the buzzer 8 is electrically connected to the output terminal of the main control circuit board 6.

[0033] Further, the buzzer 8 is controlled by the main control circuit board 6, and operates to provide an alarm when the temperature reaches a set alarm value, so that the maintenance personnel can be positioned nearby.

[0034] Specifically, the installation box 1 is provided with a self-check button 9 for starting self-checking control, and the output end of the self-check button 9 is electrically connected with the input end of the main control circuit board 6.

[0035] Further, the self-check button 9 can control the main control circuit board 6 to complete the self-checking of the whole large tank temperature fire detection alarm, and quickly troubleshoot the fault.

[0036] The probe is powered by the battery 3, and can work in the voltage range of 2.7-3.6V for a long time. The capacity of the battery 3 is crucial to the service life of the probe. However, due to the limitation of the volume of the probe, a 2 / 3AA ER17335 type battery with a capacity of 1700mAh is finally selected. The power supply is designed based on LDO (low dropout linear regulator), the input is a voltage-uncertain lithium sub-battery, and the output is fixed at 3.0V by using a super-low quiescent current voltage linear regulator chip TPS78230. The maximum current of TPS78230 is 150mA, the maximum voltage drop is 130mV, and the super-low IQ (500nA) is achieved. Some self-protection measures are also adopted on the power supply circuit, such as fuse protection of the power supply, the fuse parameter is 6.3V / 200mA, and the anti-reverse connection measure of the P-channel MOS tube is used. When the positive and negative poles of the battery are reversed, the MOS tube is in the cut-off state, which will not be connected to the power supply system and will not cause short circuit and burn out the fuse. In order to inform the low voltage state in advance, the battery 3 voltage acquisition function is designed for the probe, so that the battery can be replaced before the probe stops working. The circuit uses two 1M resistors to divide the battery outlet voltage by 1:1, and the voltage range that can be recognized by the CPU AD is obtained. In order to increase the impedance of the AD circuit, a low voltage rail-to-rail operational amplifier is used to follow the battery voltage division. The battery 3 is a thionyl chloride battery. Due to the special chemical properties of the thionyl chloride battery and the non-combustible filling material, the activity is low, and it can work at a very high temperature. The annual self-discharge current is less than 1%, the storage life can reach more than 10 years, and it can even work in-50-150℃, which meets the requirements of explosion-proof battery equipment.

[0037] Figure 5 The voltage monitoring circuit principle diagram is as follows, Figure 5The middle VDD_5 is a 5V power supply when debugging, and the externally supplied VDD_5 is suspended in normal times, the battery 3 voltage is divided by two 1M resistors, and the battery 3 outlet voltage is divided by 1:1; then, the low voltage rail is followed by the operational amplifier LM358 to obtain the voltage range that can be recognized by the CPU AD interface, and the AD circuit impedance is increased, wherein the working state of the LM358 is determined by the single-chip microcomputer output (VTemp), so as to ensure that the low-voltage acquisition circuit does not consume power when the single-chip microcomputer is in sleep state; the battery 3 voltage is divided and enters the AD for voltage detection, at this time, BAT_CHK=VIN / 2; when debugging, the externally supplied VDD_5 provides a 5V power supply, at this time, BAT_CHK=VIN+(5-VIN) / 2, the present detection alarm adopts a low-power mode of periodic pulse current work, when not working, the circuit is in sleep mode, the sleep current is less than or equal to 6uA, when sampling or sending data is needed, the circuit is awakened from the sleep state and enters the working mode, the voltage is not more than 3.6V, and the maximum instantaneous emission current is only 130mA, which essentially cannot reach the condition of static spark generation, that is, it meets the explosion-proof requirements of Exia IIB-T4 Ga intrinsically safe device in GB3836.1-2010 Explosive Atmospheres Part 1: General Requirements for Equipment, GB3836.4-2010 Explosive Atmospheres Part 4: Equipment Protected by Intrinsically Safe “i” Protection, and GB3836.20-2010 Explosive Atmospheres Part 20: Equipment Protection Level (EPL) for Ga Level Equipment, the metal sleeve, the communication antenna 7, the buzzer 8 and the self-checking button 9 are filled with anticorrosive and waterproof glue inside and outside the connecting threaded parts, so as to ensure the waterproof and dustproof performance for a long period of time.

[0038] Specifically, the mounting box 1 is fixedly connected with a mounting base 10 outside, and the mounting base 10 is used for mounting the mounting box 1 at the secondary sealing position of the storage tank.

[0039] Further, the mounting base 10 is arranged to fix the mounting box 1 at the temperature of the secondary sealing position of the floating roof of the oil tank, and facilitate maintenance and replacement of the large storage tank temperature fire detection alarm, the mounting base 10 is made of stainless steel and is fixed on the secondary sealing position of the floating roof of the oil tank by bolts, so that after the mounting box 1 is installed in place, the position of the temperature sensor 5 is opposite and close to the secondary sealing position of the floating roof of the oil tank, so as to obtain more accurate temperature and reduce the influence of the external environment on temperature detection.

[0040] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A large tank temperature-sensing fire detection alarm, comprising a mounting box (1), the inside of the mounting box (1) is provided with a temperature sensor (5) for temperature monitoring, the top end of the mounting box (1) is provided with a box cover (2) for closing the mounting box (1), characterized in that, The inside of the installation box (1) is provided with a battery (3) for continuously providing power, the inside of the installation box (1) is provided with a leakage prevention assembly (4) for preventing the battery (3) from leaking, the leakage prevention assembly (4) comprises a leakage prevention buckle (41), the inner wall of the installation box (1) is provided with a clamping groove for the leakage prevention buckle (41) to fit, the bottom of the leakage prevention buckle (41) is provided with a mounting seat (42) for mounting the leakage prevention buckle (41), and the top end of the mounting seat (42) is provided with a limiting piece for limiting the rotation angle of the leakage prevention buckle (41).

2. The large storage tank temperature-sensing fire detection alarm according to claim 1, wherein A groove is formed on one side of the top end of the mounting seat (42) for mounting the leakage prevention buckle (41), the bottom of the leakage prevention buckle (41) is rotatably connected with the groove, and the other side of the top of the mounting seat (42) is provided with a mounting groove for placing the battery (3), and one side of the leakage prevention buckle (41) is fixedly connected with an elastic block (44).

3. The large storage tank temperature-sensing fire detection alarm according to claim 1, wherein The limiting piece comprises a limiting block (43), and the bottom end of the limiting block (43) is fixedly connected with one side of the top end of the mounting seat (42).

4. The large storage tank temperature-sensing fire detection alarm according to claim 1, wherein The inside of the installation box (1) is provided with a main control circuit board (6) for controlling the temperature sensor (5), and the output end of the temperature sensor (5) is electrically connected with the input end of the main control circuit board (6).

5. The large storage tank temperature-sensing fire detection alarm according to claim 4, wherein The front of the installation box (1) is provided with a communication antenna (7) for wirelessly transmitting data, and the input end of the communication antenna (7) is electrically connected with the output end of the main control circuit board (6).

6. The large storage tank temperature-sensing fire detection alarm according to claim 4, wherein One side of the installation box (1) is provided with a buzzer (8) for sound alarm, and the input end of the buzzer (8) is electrically connected with the output end of the main control circuit board (6).

7. The large storage tank temperature-sensing fire detection alarm according to claim 4, wherein One side of the installation box (1) is provided with a self-checking button (9) for starting self-checking control, and the output end of the self-checking button (9) is electrically connected with the input end of the main control circuit board (6).

8. The large storage tank temperature-sensing fire detection alarm according to claim 1, wherein The installation box (1) is fixedly connected with a mounting base (10) on the outside, and the mounting base (10) is used for mounting the installation box (1) at the secondary sealing position of the storage tank.

Images