Heating device capable of enabling anti-explosion tachometer to be used in extremely cold environment

Abstract

The utility model discloses a heating device capable of enabling an explosion-proof tachometer to be used in an extremely cold environment, which comprises a shell arranged in the explosion-proof tachometer, and a heating device for heating the inside of the explosion-proof tachometer is arranged in the shell. A temperature detection device J5 used for detecting the temperature in the anti-explosion tachometer is arranged on the side, close to the heating device, of the shell, and a control module used for controlling the heating device and the temperature detection device J5 is arranged in the side, located on the side edge of the heating device, of the shell. The front side of the control module is provided with a power supply module which provides electric energy for the heating device, the temperature detection device J5 and the control module. The explosion-proof tachometer overcomes the problem that a traditional explosion-proof tachometer in the prior art cannot work normally in an extremely cold environment. The explosion-proof device has the advantages of simple structure, convenience in use, capability of enabling the explosion-proof rotating speed to work in an extremely low environment and the like.

Description

Technical Field

[0001] The utility model relates to the field of tachometers, and more specifically, to a heating device that enables an explosion-proof tachometer to be used in extremely cold environments. Background Art

[0002] At present, a portable hand-held explosion-proof tachometer is disclosed on the Chinese Patent Network, with the publication number CN217385544U. The utility model relates to the technical field of tachometers, including a body. Positioning members are arranged on both sides below the body, and a positioning and adjusting component is arranged at the rear side below the body. A groove is formed on the lower side of the body, and a winding shaft is horizontally rotatably installed inside the groove. An anti-detachment member is sleeved outside the winding shaft. The anti-detachment member includes an anti-detachment cloth, which is wound around the winding shaft. A limiting rod is connected to the upper side of the anti-detachment cloth, and the limiting rod is connected to the rear side above the body. A plurality of card slots are equidistantly arranged at the middle position of one side of the anti-detachment cloth. For this portable hand-held explosion-proof tachometer, when detecting, insert the hand into the anti-detachment cloth to facilitate holding the tachometer. And by adjusting the positioning and adjusting component, the positioning piece on the limiting strip can be stuck into the corresponding card slot on the anti-detachment cloth, so as to conveniently adapt to hands of different sizes to hold the tachometer, which is convenient and fast.

[0003] Although the portable hand-held explosion-proof tachometer in the above patent has the advantages of not being easily dropped and being convenient to use, it does not have a heat preservation device inside. When the explosion-proof tachometer is in an extremely cold environment, the internal electronic devices cannot work normally in the low-temperature environment. Summary of the Utility Model

[0004] In order to overcome the problem that the traditional explosion-proof tachometer cannot work normally in extremely cold environments in the prior art, the utility model now provides a heating device that enables an explosion-proof tachometer to be used in extremely cold environments and has the advantage of being able to work normally in extremely cold environments.

[0005] A heating device that enables an explosion-proof tachometer to be used in extremely cold environments according to the utility model includes a housing installed inside the explosion-proof tachometer. A heating device for heating the inside of the explosion-proof tachometer is arranged inside the housing. A temperature detection device J5 for detecting the temperature inside the explosion-proof tachometer is arranged on the housing near one side of the heating device. A control module for respectively controlling the heating device and the temperature detection device J5 is arranged inside the housing on the side of the heating device. A power supply module for supplying electric energy to the heating device, the temperature detection device J5 and the control module respectively is arranged in front of the control module.

[0006] Preferably, the heating device includes a base body. Heating wires are symmetrically distributed front and back at the bottom inside the base body. A U-shaped air duct that cooperates with the heating wires is arranged above the heating wires.

[0007] The described air duct is made of a material with good thermal conductivity.

[0008] Preferably, the left and right nozzles of the air duct respectively pass through the housing and extend outside the housing. A unidirectional fan J4 used in cooperation with the air duct is installed at the left nozzle of the air duct. The control end of the unidirectional fan J4 is electrically connected to the signal transmission end of the control module.

[0009] Preferably, two heating wires are connected in series to form a heating resistor RW. The control end of the heating resistor RW is electrically connected to the signal transmission end of the control module.

[0010] Preferably, the power supply module includes a socket J1, a diode D1, and a switch K1. The positive pole of the socket J1 is electrically connected to the positive pole of the diode D1. The negative pole of the socket J1 is grounded. The negative pole of the diode D1 is electrically connected to one end of the switch K1. The other end of the switch K1 outputs +VCC.

[0011] Preferably, the control module includes a control chip U1, resistors R1, R2, R3, R4, R5, capacitors C1, C2, C3, a switch K2, a crystal oscillator Y1, transistors Q1, Q2, relays J2 and J3. One end of the crystal oscillator Y1 is electrically connected to one end of the capacitor C1 and the 19th pin of the control chip U1 respectively. The other end of the crystal oscillator Y1 is electrically connected to one end of the capacitor C2 and the 18th pin of the control chip U1 respectively. The other ends of the capacitor C1 and the capacitor C2 are electrically connected. The other end of the capacitor C1 is grounded. One end of the resistor R1 is electrically connected to one end of the switch K2, one end of the capacitor C3 and the 9th pin of the control chip U1 respectively. The other end of the resistor R1 is grounded. The other end of the switch K2 and the other end of the capacitor C3 are electrically connected. The other end of the switch K2 is connected to +VCC. The 31st pin of the control chip U1 is connected to +VCC. The 1st pin of the temperature detection device J5 is connected to +VCC. The 4th pin of the temperature detection device J5 is grounded. The 2nd pin of the temperature detection device J5 is electrically connected to the 4th pin of the control chip U1. The 3rd pin of the temperature detection device J5 is electrically connected to the 5th pin of the control chip U1. The 7th pin of the control chip U1 is electrically connected to one end of the resistor R3. The other end of the resistor R3 is electrically connected to the base of the transistor Q1. The emitter of the transistor Q1 is connected to +VCC. The collector of the transistor Q1 is electrically connected to one end of the resistor R2 and the 5th pin of the relay J2 respectively. The other end of the resistor R2 is electrically connected to the 6th pin of the relay J2. The 1st and 2nd pins of the relay J2 are grounded. The 3rd pin of the relay J2 is connected to +VCC. The 4th pin of the relay J2 is electrically connected to the positive electrode of the unidirectional fan J4. The negative electrode of the unidirectional fan J4 is grounded. The 6th pin of the control chip U1 is electrically connected to one end of the resistor R5. The other end of the resistor R5 is electrically connected to the base of the transistor Q2. The emitter of the transistor Q2 is connected to +VCC. The collector of the transistor Q2 is electrically connected to one end of the resistor R4 and the 5th pin of the relay J3 respectively. The other end of the resistor R4 is electrically connected to the 6th pin of the relay J3. The 1st and 2nd pins of the relay J3 are grounded. The 3rd pin of the relay J3 is connected to +VCC. The 4th pin of the relay J3 is electrically connected to the positive electrode of the heating resistor RW. The negative electrode of the heating resistor RW is grounded.

[0012] The model of the control chip U1 can be STC89C52. The model of the temperature detection device J5 can be PT-100. Before normal operation, the user can burn the required program into the control chip U1 through a programmer. The switch K2 is used to reset the control chip U1.

[0013] When the explosion-proof tachometer works in an extremely low temperature environment, first connect the socket J1 to an external power supply. The external power supply can be a portable power supply such as a storage battery. Then press the switch K1. After that, the socket J1 supplies electrical energy to the temperature detection device J5, the heating resistor RW, the unidirectional fan J4, and the control chip U1 respectively.

[0014] After that, the temperature detection device J5 will detect the temperature inside the explosion-proof tachometer in real time and send the collected data to the control chip U1. The control chip U1 will compare and calculate the received temperature data. When the temperature is equal to or lower than the preset value, the control chip U1 will send an action instruction to the relay J2. After receiving the instruction, the relay J2 will energize the heating resistor RW. At this time, the heating resistor RW starts to work to heat the air duct. At the same time, the control chip U1 will also send an action instruction to the relay J3. After receiving the instruction, the relay J3 will energize the unidirectional fan J4. The unidirectional fan J4 will suck the air inside the explosion-proof tachometer into the air duct. Since the thermal conductivity of the air duct is relatively high, the heated air duct will heat the air entering the air duct. The heated air will flow out of the right port of the air duct and enter the explosion-proof tachometer to make the explosion-proof tachometer in a temperature environment where it can work normally. In order to ensure the dryness inside the explosion-proof tachometer, a desiccant can be set at the right port of the air duct to remove the water droplets formed by the condensation of the water vapor in the heated air when it cools.

[0015] The utility model has the following beneficial effects: simple structure, convenient to use, and can make the explosion-proof tachometer work in an extremely low environment. Description of the Drawings

[0016] Attached Figure 1 is a schematic structural diagram of the utility model.

[0017] Attached Figure 2 is a schematic structural diagram of the heating device of the utility model.

[0018] Attached Figure 3 is a schematic circuit diagram of the utility model.

[0019] Attached Figure 4 is a schematic diagram of the power supply module of the utility model.

[0020] Attached Figure 5 is a schematic diagram of the control module of the utility model.

[0021] Housing 1, heating device 2, control module 3, power supply module 4, seat body 5, heating wire 6, air duct 7. Detailed Embodiment

[0022] The technical solution of the utility model will be further specifically described below through embodiments and in conjunction with the drawings.

[0023] Example: Further described according to the appended Figure 1 , the appended Figure 2 , the appended Figure 3 , the appended Figure 4 and the appended Figure 5 For further illustration, a heating device that allows an explosion-proof tachometer to be used in extremely cold environments in this example includes a housing 1 installed in the explosion-proof tachometer. A heating device 2 for heating the inside of the explosion-proof tachometer is provided in the housing 1. A temperature detection device J5 for detecting the temperature inside the explosion-proof tachometer is provided on the housing 1 near one side of the heating device 2. A control module 3 for separately controlling the heating device 2 and the temperature detection device J5 is provided in the housing 1 on the side of the heating device 2. A power supply module 4 for supplying electrical energy to the heating device 2, the temperature detection device J5, and the control module 3 is provided in front of the control module 3.

[0024] The heating device 2 includes a seat body 5. Heating wires 6 are symmetrically distributed front and back at the bottom inside the seat body 5. An air duct 7 in a U shape that cooperates with the heating wires 6 is provided above the heating wires 6.

[0025] The left and right pipe orifices of the air duct 7 respectively pass through the housing 1 and extend to the outside of the housing 1. A one-way fan J4 that cooperates with the air duct 7 is installed at the left pipe orifice of the air duct 7. The control end of the one-way fan J4 is electrically connected to the signal transmission end of the control module 3.

[0026] Two heating wires 6 are connected in series to form a heating resistor RW. The control end of the heating resistor RW is electrically connected to the signal transmission end of the control module 3.

[0027] The power supply module 4 includes a socket J1, a diode D1, and a switch K1. The positive electrode of the socket J1 is electrically connected to the positive electrode of the diode D1. The negative electrode of the socket J1 is grounded. The negative electrode of the diode D1 is electrically connected to one end of the switch K1. The other end of the switch K1 outputs +VCC.

[0028] The control module 3 described above includes a control chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a switch K2, a crystal oscillator Y1, a triode Q1, a triode Q2, a relay J2 and a relay J3. One end of the crystal oscillator Y1 is electrically connected to one end of the capacitor C1 and the 19th pin of the control chip U1 respectively. The other end of the crystal oscillator Y1 is electrically connected to one end of the capacitor C2 and the 18th pin of the control chip U1 respectively. The other ends of the capacitor C1 and the capacitor C2 are electrically connected. The other end of the capacitor C1 is grounded. One end of the resistor R1 is electrically connected to one end of the switch K2, one end of the capacitor C3 and the 9th pin of the control chip U1 respectively. The other end of the resistor R1 is grounded. The other end of the switch K2 is electrically connected to the other end of the capacitor C3. The other end of the switch K2 is connected to +VCC. The 31st pin of the control chip U1 is connected to +VCC. The 1st pin of the temperature detection device J5 is connected to +VCC. The 4th pin of the temperature detection device J5 is grounded. The 2nd pin of the temperature detection device J5 is electrically connected to the 4th pin of the control chip U1. The 3rd pin of the temperature detection device J5 is electrically connected to the 5th pin of the control chip U1. The 7th pin of the control chip U1 is electrically connected to one end of the resistor R3. The other end of the resistor R3 is electrically connected to the base of the triode Q1. The emitter of the triode Q1 is connected to +VCC. The collector of the triode Q1 is electrically connected to one end of the resistor R2 and the 5th pin of the relay J2 respectively. The other end of the resistor R2 is electrically connected to the 6th pin of the relay J2. The 1st pin and the 2nd pin of the relay J2 are grounded. The 3rd pin of the relay J2 is connected to +VCC. The 4th pin of the relay J2 is electrically connected to the positive pole of the unidirectional fan J4. The negative pole of the unidirectional fan J4 is grounded. The 6th pin of the control chip U1 is electrically connected to one end of the resistor R5. The other end of the resistor R5 is electrically connected to the base of the triode Q2. The emitter of the triode Q2 is connected to +VCC. The collector of the triode Q2 is electrically connected to one end of the resistor R4 and the 5th pin of the relay J3 respectively. The other end of the resistor R4 is electrically connected to the 6th pin of the relay J3. The 1st pin and the 2nd pin of the relay J3 are grounded. The 3rd pin of the relay J3 is connected to +VCC. The 4th pin of the relay J3 is electrically connected to the positive pole of the heating resistor RW. The negative pole of the heating resistor RW is grounded.

[0029] The above are only specific embodiments of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A heating device that enables an explosion-proof tachometer to be used in extremely cold environments, including a housing (1) installed inside the explosion-proof tachometer, characterized in that, A heating device (2) for heating the interior of the explosion-proof tachometer is provided inside the described housing (1). A temperature detection device J5 for detecting the temperature inside the explosion-proof tachometer is provided on the housing (1) near one side of the heating device (2). A control module (3) for respectively controlling the heating device (2) and the temperature detection device J5 is provided inside the housing (1) on the side of the heating device (2). A power supply module (4) for supplying electrical energy to the heating device (2), the temperature detection device J5, and the control module (3) respectively is provided in front of the control module (3).

2. The heating device for enabling an explosion-proof tachometer to be used in an extremely cold environment according to claim 1, wherein The described heating device (2) includes a seat body (5). Heating wires (6) symmetrically distributed front and back are provided at the inner bottom of the seat body (5). An air guide pipe (7) in a U shape and cooperating with the heating wires (6) is provided above the heating wires (6).

3. The heating device for enabling an explosion-proof tachometer to be used in an extremely cold environment according to claim 2, wherein The left and right two pipe orifices of the air guide pipe (7) respectively pass through the housing (1) and extend outside the housing (1). A one-way fan J4 cooperating with the air guide pipe (7) is installed at the left pipe orifice of the air guide pipe (7). The control end of the one-way fan J4 is electrically connected to the signal transmission end of the control module (3).

4. A heating device for allowing an explosion-proof tachometer to be used in an extremely cold environment according to claim 2, characterized in that, Two heating wires (6) are connected in series to form a heating resistor RW. The control end of the heating resistor RW is electrically connected to the signal transmission end of the control module (3).

5. The heating device for enabling an explosion-proof tachometer to be used in an extremely cold environment according to claim 1, characterized in that The described power supply module (4) includes a socket J1, a diode D1, and a switch K1. The positive electrode of the socket J1 is electrically connected to the positive electrode of the diode D1. The negative electrode of the socket J1 is grounded. The negative electrode of the diode D1 is electrically connected to one end of the switch K1. The other end of the switch K1 outputs +VCC.

6. The heating device for allowing an explosion-proof tachometer to be used in an extremely cold environment according to claim 5, wherein The described control module (3) includes a control chip U1, resistors R1, R2, R3, R4, R5, capacitors C1, C2, C3, a switch K2, a crystal oscillator Y1, transistors Q1, Q2, relays J2 and J3. One end of the crystal oscillator Y1 is electrically connected to one end of the capacitor C1 and the 19th pin of the control chip U1 respectively. The other end of the crystal oscillator Y1 is electrically connected to one end of the capacitor C2 and the 18th pin of the control chip U1 respectively. The other ends of the capacitor C1 and the capacitor C2 are electrically connected. The other end of the capacitor C1 is grounded. One end of the resistor R1 is electrically connected to one end of the switch K2, one end of the capacitor C3 and the 9th pin of the control chip U1 respectively. The other end of the resistor R1 is grounded. The other end of the switch K2 is electrically connected to the other end of the capacitor C3. The other end of the switch K2 is connected to +VCC. The 31st pin of the control chip U1 is connected to +VCC. The 1st pin of the temperature detection device J5 is connected to +VCC. The 4th pin of the temperature detection device J5 is grounded. The 2nd pin of the temperature detection device J5 is electrically connected to the 4th pin of the control chip U1. The 3rd pin of the temperature detection device J5 is electrically connected to the 5th pin of the control chip U1. The 7th pin of the control chip U1 is electrically connected to one end of the resistor R3. The other end of the resistor R3 is electrically connected to the base of the transistor Q1. The emitter of the transistor Q1 is connected to +VCC. The collector of the transistor Q1 is electrically connected to one end of the resistor R2 and the 5th pin of the relay J2 respectively. The other end of the resistor R2 is electrically connected to the 6th pin of the relay J2. The 1st and 2nd pins of the relay J2 are grounded. The 3rd pin of the relay J2 is connected to +VCC. The 4th pin of the relay J2 is electrically connected to the positive electrode of the unidirectional fan J4. The negative electrode of the unidirectional fan J4 is grounded. The 6th pin of the control chip U1 is electrically connected to one end of the resistor R5. The other end of the resistor R5 is electrically connected to the base of the transistor Q2. The emitter of the transistor Q2 is connected to +VCC. The collector of the transistor Q2 is electrically connected to one end of the resistor R4 and the 5th pin of the relay J3 respectively. The other end of the resistor R4 is electrically connected to the 6th pin of the relay J3. The 1st and 2nd pins of the relay J3 are grounded. The 3rd pin of the relay J3 is connected to +VCC. The 4th pin of the relay J3 is electrically connected to the positive electrode of the heating resistor RW. The negative electrode of the heating resistor RW is grounded.

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