Enclosed space monitoring device

Abstract

A closed space monitoring device (1) is provided with a holding section (2) fixed to an insertion hole provided in a wall surface section for forming a closed space for a conduit (D) and the like, and a metal guide tube (5) movably supported by the holding section (2). A thermal insulation part 6 is arranged at the front end in the guide cylinder 5, and a monitoring part 7 is arranged at the rear of the thermal insulation part 6. When the inside of the catheter D is monitored, image data captured by the monitoring unit 7 advancing into the catheter D and temperature data obtained by the temperature measuring unit 9 are transmitted to an external device P via a processing circuit unit 4d. During non-driving, the monitoring unit 7 is housed in the guide tube 5 together with the heat insulation unit 6.

Description

Technical Field

[0001] The present invention relates to a closed space monitoring device, and the closed space monitoring device confirms the state of a closed space such as a duct through an image or the like from a remote place. Background Art

[0002] Patent document 1 discloses a fire sensing system in which a visible light camera is installed in a duct for exhausting fumes and the like generated in a kitchen, etc., and abnormalities in the duct are monitored from the outside via the visible light camera.

[0003] In this monitoring system capable of monitoring the inside of a duct with a visible light camera, an operator can confirm the following conditions and oil components of the oil fume through images from the visible light camera: the condition of the oil fume flowing in the duct; the oil components attached to the wall of the duct; or the oil components attached to a fire damper that is located near the visible light camera and has the function of closing the flow path.

[0004] Then, in the event of abnormal accumulation of oil smoke, or when a large amount of oil components adhere to the wall or fire damper, for example, an inspection including cleaning can be carried out to prevent fire in the duct. [Prior art literature]

[0005] Patent document 1: Japanese Patent Application Publication No. 2020-521193. Summary of the invention [Problems to be solved by the invention]

[0006] However, if the visible light camera that is a monitoring unit and is installed in the above-mentioned duct is used over a long period of time in the smoke generated in a cooking place, etc., dirt such as oil components will adhere to the lens, making it difficult to visualize the situation in the duct.

[0007] Furthermore, when a fire occurs in the duct, due to the continuation of the high temperature state, an integrated circuit chip or substrate constituting the monitoring unit may be damaged by heat, and monitoring may no longer be possible.

[0008] In addition, there is the following problem that may cause disasters: when an integrated circuit chip or substrate constituting the monitoring unit fails and a fire breaks out from the monitoring unit, the combustion spreads to flammable contaminants near the monitoring unit.

[0009] The object of the present invention is to provide a closed space monitoring device that solves the above-mentioned problems, prevents dirt from adhering to the lens of the monitoring unit, prevents damage to the monitoring unit due to heating, and prevents failure of the monitoring unit from becoming a cause of fire in the closed space. [Effects of the Invention]

[0010] According to the enclosed space monitoring device of the present invention, since the monitoring unit for monitoring the enclosed space advances into the enclosed space only when necessary, it is possible to prevent dirt such as oil components from adhering to the lens of the monitoring unit. In addition, a heat-insulating unit is provided on the monitoring unit to prevent damage to the monitoring unit caused by heating, and even if a fire starts from the monitoring unit, dirt in the enclosed space will not be ignited and a fire will not occur in the enclosed space. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] [ Figure 1 ] is a diagram of the structure of the closed space monitoring device of Example 1 relative to the catheter. [ Figure 2 ] is a structural diagram showing the state in which the monitoring unit is advanced into the catheter. [ Figure 3 ] is a structural diagram of the closed space monitoring device of Example 2. [ Figure 4 ] is a structural diagram showing the state in which the monitoring unit is advanced into the catheter. DETAILED DESCRIPTION

[0012] The present invention will be described in detail based on the embodiments of the drawings. [Example 1]

[0013] Figure 1 It is a structural diagram of the closed space monitoring device of the first embodiment relative to the inside of the conduit; Figure 2 This is a diagram showing the configuration of a state where the monitoring unit is advanced into the catheter.

[0014] The conduit D in which the closed space monitoring device 1 is installed forms a closed space; for example, the conduit D is a smoke exhaust pipe installed in a conditioning place, etc., and is used to exhaust the exhaust smoke generated by the conditioning to the outside, and exhaust the air containing high-temperature oil components to the outside. In addition, the conduit D can also be a conduit installed in a factory, etc., and exhaust the air containing dust, etc.

[0015] Furthermore, a fire damper (not shown) is arranged in each section of the duct D; when a fire occurs in the duct D, the heat caused by the fire causes the heat-sensitive fuse member of the fire damper to melt, so the wing portion of the fire damper rotates 90 degrees due to the release of the force and closes the smoke exhaust flow path of the duct D. In this way, since the flow path is closed by the fire damper, it is possible to prevent the fire from spreading to the downstream side of the fire damper and burning.

[0016] Although in Figure 1 The shape of the middle duct D, which is orthogonal to the flow direction of smoke, is circular in cross section, but may be any appropriate cross-sectional shape other than a cylindrical shape, such as a rectangular tube. The closed space monitoring device 1 is mainly fixed to the outside of the side surface D1 of the duct D, and is composed of the following components: a holding portion 2 having a through hole 2a in the center, the through hole 2a being inserted into the insertion hole D2 of the duct D; a main body 3 having a cylindrical shape and installed in the through hole 2a; and a fixed control portion 4 connected to the rear end of the main body 3.

[0017] The retaining portion 2 is composed of a disc-shaped flange 2b and a short cylindrical portion 2c. The flange 2b is fixed to the side surface D1 from the outside by screws or rivets, and the short cylindrical portion 2c extends outward from the center of the flange 2b; a through hole 2a is formed in the short cylindrical portion 2c.

[0018] On the other hand, the main body 3 includes: a metal guide tube 5, which is in a cylindrical shape and communicates with the insertion hole D2 and is fixed in the through hole 2a; a heat insulating portion 6, which can slide back and forth in the guide tube 5 and seals the front end of the guide tube 5; and a monitoring portion 7, which is arranged behind the heat insulating portion 6 and can also slide back and forth in the guide tube 5. The heat insulating portion 6 is made of a material such as ceramic with a low thermal conductivity, and the monitoring portion 7 is composed of a camera that can take pictures of the inside of the catheter.

[0019] The heat insulating part 6 is composed of a disc-shaped head 6a and a rod body 6b that can slide relative to the guide tube 5. The head 6a is embedded in the conduit D side of the through hole 2a. The rod body 6b extends backward from the head 6a and has a smaller outer diameter than the head 6a. The monitoring part 7 is connected to the rear of the rod body 6b, and the outer diameter of the monitoring part 7 is slightly consistent with the outer shape of the rod body 6b. In addition, the signal line from the monitoring part 7 is connected to the control part 4 through the guide tube 5.

[0020] In addition, the lens of the monitoring unit 7 is arranged toward the center line direction of the duct D so as to be able to photograph the fire damper and the like provided in the duct D. The monitoring unit 7 may also adopt a fisheye lens capable of photographing a wide angle range, or may have a zoom function in accordance with an operation from the outside. In addition, for example, an infrared camera may be used and a light emitting unit may be provided near the monitoring unit 7 and synchronized with the photographing of the monitoring unit 7 so as to light up the light emitting unit.

[0021] The movable barrel 8 is connected to the rear end portion 7a of the monitoring unit 7 in a manner that it cannot rotate but can move along the longitudinal direction, and a worm gear 4a of the control unit 4, which will be described later, is inserted into the movable barrel 8. An engaging portion is formed in the movable barrel 8, and the engaging portion is used to engage with the spiral tooth portion provided on the worm gear 4a.

[0022] The control unit 4 includes: a worm gear 4a having teeth carved on the rod-shaped metal body; a driving unit 4b composed of an electric motor for rotating the worm gear 4a; and a processing circuit unit 4d, which controls the driving unit 4b via wiring 4c and also obtains image data from the monitoring unit 7 via a signal line.

[0023] In addition, the power of the external power source S such as a commercial power source is supplied to the driving unit 4b via the power line 4f and to the processing circuit unit 4d via the converter unit 4e. The processing circuit unit 4d has an antenna 4g, which wirelessly transmits the observation data to the external device P, wherein the observation data is composed of the input image data and temperature data.

[0024] For example, the external device P can be a tablet personal computer or a computer, and can manage a plurality of closed space monitoring devices 1. Then, observation data in the catheter D can be obtained by controlling the driving unit 4b through the processing circuit unit 4d according to the operator's operation of the external device P.

[0025] In addition, in the closed space monitoring device 1, a temperature measuring unit 9 for measuring the temperature in the conduit D can be provided in the main body 3 as required. The temperature measuring unit 9 can use a thermocouple or a thermometer resistor as a temperature sensing component, and its front end is covered by a protective tube 9a, and further, a sealing member 9b is installed at its front end. The sealing member 9b has a large thermal conductivity and is made of a non-insulating material.

[0026] The protection tube 9a and the sealing member 9b are inserted into the auxiliary through hole different from the through hole 2a provided in the flange 2b of the holding portion 2, and inserted into the auxiliary insertion hole D3 provided in the side portion D1 of the conduit D. Then, for example, the output of the temperature sensing component is connected to the processing circuit portion 4d of the control portion 4 via a signal line such as a compensation wire.

[0027] Although the temperature measuring unit 9 is not necessarily indispensable in the closed space monitoring device 1, the processing circuit unit 4d of the control unit 4 can sense the temperature inside the conduit D through the temperature data sent by the temperature measuring unit 9 via the signal line, and as long as the temperature data of the temperature measuring unit 9 and the image data of the monitoring unit 7 can be obtained as observation data, the situation inside the conduit D can be grasped more accurately.

[0028] Figure 1 The state shown is a state in which the closed space monitoring device 1 is not driven and the operator does not operate the external device P, and the front end of the guide tube 5 is sealed by the head 6a of the heat insulating portion 6 and is sealed. In addition, since the heat insulating portion 6 is made of a material that is difficult to conduct heat and the rod portion 6b is long, there is little concern that the temperature in the conduit D is transmitted to the monitoring portion 7, and the monitoring portion 7 is not damaged by overheating.

[0029] In this way, the front end of the guide tube 5 is sealed with respect to the heat insulating portion 6 to form a sealed first state. When the condition in the conduit D is to be monitored, the operation from the external device P or the like can be performed. Figure 2 The monitoring unit 7 is moved as shown so as to advance from the guide tube 5 into the catheter D to reach the second state.

[0030] In order to Figure 1 The first state shown transitions to Figure 2 In the second state shown, the drive unit 4b is driven via the processing circuit unit 4d according to the operation from the external device P, and the worm gear 4a is rotated. When the worm gear 4a starts to rotate, the movable barrel 8 including the meshing portion engaged with the teeth moves forward following the movement of the worm gear 4a. In addition, in order to suppress the rotation of the movable barrel 8, the movable barrel 8 is provided with a groove or a convex strip that engages with the guide barrel 5, etc., so that the monitoring unit 7 moves in the front-rear direction without rotating.

[0031] Furthermore, a structure may be adopted in which the guide tube 5 itself can be rotated relative to the through hole 2a. With such a rotating structure, it is also possible to photograph the circumferential direction in the catheter D with the monitoring unit 7 under the control from the processing circuit unit 4d.

[0032] In addition, the front end position of the tooth portion 4b of the worm gear 4a is adjusted in advance to a forward position suitable for the monitoring unit 7 to take pictures, thereby stopping the monitoring unit 7 at Figure 2The predetermined position of the second state is shown.

[0033] In this state, the monitoring unit 7 captures the inside of the catheter D, and the temperature measuring unit 9 measures the temperature inside the catheter D. Then, for example, the image data and temperature data acquired by the processing circuit unit 4d can be accumulated or transmitted to the external device P via the antenna 4g.

[0034] When the monitoring unit 7 is finished observing, the driving unit 4b is driven to rotate in the reverse direction via the processing circuit unit 4d, thereby the monitoring unit 7 moves backward. Then, the heat insulating unit 6 is stored in the guide tube 5, and the head 6a of the heat insulating unit 6 seals the front end of the through hole 2a, thereby returning to the first state. In addition, since the head 6a is locked by the front end of the guide tube 5 at this time, the monitoring unit 7 does not move further backward in the guide tube 5.

[0035] In this way, the heat blocking part 6 can be moved together with the monitoring part 7 by controlling the driving part 4b of the control part 4, thereby transitioning from the first state to the second state or from the second state to the first state; wherein the first state is a state in which the front end of the guide tube 5 is sealed with the heat blocking part 6, and the second state is a state in which the monitoring part 7 advances from the guide tube 5 to the conduit D.

[0036] Furthermore, even in the non-driving state in the first state, the temperature inside the conduit D can be measured by the temperature measuring unit 9 , and the temperature data acquired by the processing circuit unit 4 d can be accumulated or transmitted to the external device P at regular intervals, for example.

[0037] Alternatively, when the processing circuit unit 4 d indicates that the temperature data in the catheter D is abnormal in the first state, for example, an alarm may be output to the external device P or the state may be automatically changed to the second state to obtain image data by the monitoring unit 7 .

[0038] Although in the first state, there is no need to switch to the second state unless the temperature data measured by the temperature measuring unit 9 is particularly abnormal, it can be set to monitor regularly. For example, the operator can operate from the first state to the second state and observe the state inside the catheter D once a week.

[0039] In the second state, as long as the image data and temperature data are not abnormal, the system will return to the first state and continue to operate. For example, if there is an abnormality, the inside of the duct D will be cleaned and / or inspected in the following cases: according to the imaging data, the amount of oil components or exhaust smoke attached to the duct D is large; or according to the temperature data, the temperature of the duct D is extremely high compared to normal.

[0040] In addition, in the first state, the lens of the monitoring unit 7 is stored in the guide tube 5 and does not come into contact with the exhaust smoke flowing in the duct D. Therefore, except for the second state in which the lens of the monitoring unit 7 comes into contact with the exhaust smoke flowing in the duct D, there is no concern that dirt such as oil components adheres to the lens of the monitoring unit 7. Even if dirt adheres to the lens of the monitoring unit 7 in the second state, when the monitoring unit 7 is stored in the guide tube 5, the front end of the guide tube 5 will scrape and remove the dirt on the lens.

[0041] In addition, since the monitoring unit 7 is housed in the guide tube 5 made of non-inflammable metal in the first state, even if the integrated circuit chip constituting the monitoring unit 7 is in a bad state and sparks occur, such as due to a short circuit, and the substrate burns, dirt containing oil components and attached to the side surface D1 inside the conduit D will not be ignited, thereby causing a fire inside the conduit D.

[0042] Furthermore, if Figure 1 As shown, the length of the rod portion 6b of the heat insulating portion 6 is made to be a multiple of the diameter of the monitoring portion 7, so that the monitoring portion 7, which may become the cause of a fire in the closed space monitoring device 1, is sufficiently far away from the dirt in the duct D with flammability; therefore, the burning will not spread from the monitoring portion 7 that has already caught fire to the dirt in the duct D, and safety can be further ensured. [Example 2]

[0043] Figure 3 as well as Figure 4 It is a structural diagram of the second embodiment, and the same reference numerals as those of the first embodiment indicate the same components.

[0044] Figure 3 It is a structural diagram of a state where the closed space monitoring device 1' has been installed in the conduit D; Figure 4 This is a structural diagram showing a state in which the monitoring unit 7 of the closed space monitoring device 1' has been advanced from the guide tube 5' into the conduit D.

[0045] In the closed space monitoring device 1 of the first embodiment, the front end of the guide tube 5 is sealed at the heat insulating portion 6 to form a closed and Figure 1 In the first state shown, the front end surface of the head portion 6 a of the heat insulating portion 6 in which the insertion hole D2 is sealed is flush with the inner surface of the side portion D1 .

[0046] In contrast, in the second embodiment, when not driven in the first state, the guide tube 5 ′ protrudes into the catheter D, that is, the monitoring unit 7 is arranged in the catheter D at a position about one third of the inner diameter of the catheter D.

[0047] In addition, compared with the length of the heat insulating portion 6 in the first embodiment, the length of the heat insulating portion 6' is sufficiently short. Figure 4 In the second state shown, the monitoring unit 7 is located inside the catheter D, so the distance that the monitoring unit 7 moves forward from the guide tube 5 ′ can be shortened.

[0048] In the second embodiment, the guide tube 5' is made of the same material as the heat insulating parts 6, 6', and the heat insulating parts 6, 6' similarly block heat conduction to the monitoring part 7. In addition, the thickness of the guide tube 5' can be appropriately increased to further block heat.

[0049] The operation and use method of the enclosed space monitoring device 1' in the second embodiment are almost the same as those of the enclosed space monitoring device 1 in the first embodiment. Since the monitoring unit 7 is stored in the guide tube 5' in the first state, dirt such as oil components will not adhere to the lens of the monitoring unit 7 in the enclosed space monitoring device 1' of the second embodiment.

[0050] Furthermore, in the closed space monitoring devices 1 and 1' of the first and second embodiments, a heat insulating portion 6 and 6' are provided for the monitoring portion 7; thereby, damage to the monitoring portion 7 caused by heating during a fire is prevented, and even if a fire starts from the monitoring portion 7, the dirt in the conduit D will not be ignited and the fire will not occur in the conduit D.

[0051] In the figure: 1.1': Closed space monitoring device 2: Maintaining part 2a: Through hole 3: Body part 4: Control Department 4a: Snail gear 4c: Driving unit 4d:Signal line 4e: Processing circuit part 5, 5': guide tube 6, 6': Thermal insulation 7: Surveillance Department 8: Movable barrel 9: Temperature measurement department D: Catheter D1: Side D2: Insertion hole D3: Auxiliary insertion hole P: External device

Claims

1. A closed space monitoring device, characterized in that: The enclosed space monitoring device is composed of a holding part, a main body part and a control part, wherein the holding part is fixed to the outer surface of a cylinder wall used to form the enclosed space and has a through hole connected to an insertion hole penetrating the cylinder wall, the main body part is fixed to the holding part, and the control part is connected to the rear end of the main body part; The main body comprises: a guide tube connected to the insertion hole and fixed in the through hole in a close manner; a monitoring part capable of sliding in the guide tube along the long side direction of the guide tube; and a heat insulating part connected to the front of the monitoring part and sliding in the guide tube together with the monitoring part and sealing the front end of the guide tube; The control unit includes: a driving unit for moving the monitoring unit; and a processing circuit unit for controlling the driving unit and acquiring image data from the monitoring unit; The closed space monitoring device controls the driving unit through the processing circuit unit to move the monitoring unit and the heat blocking unit from a first state to a second state, wherein the first state is that the heat blocking unit seals the front end of the guide tube and thermally blocks the monitoring unit, and the second state is that the monitoring unit moves from the guide tube to the closed space.

2. The closed space monitoring device according to claim 1, characterized in that: In the first state, the front end surface of the heat insulating portion is flush with the inner surface of the cylinder wall.

3. The closed space monitoring device according to claim 1 or 2, characterized in that: The processing circuit unit transmits the image data to an external device.

4. The closed space monitoring device according to claim 1 or 2, characterized in that: A secondary through hole different from the through hole is provided in the holding portion, and a secondary insertion hole different from the insertion hole is provided in the cylinder wall; The temperature measuring unit is inserted into the auxiliary through hole and the auxiliary insertion hole and is disposed on the main body, and measures the temperature in the closed space and transmits the temperature data to the processing circuit unit.

5. The closed space monitoring device according to claim 4, characterized in that: When the processing circuit unit indicates that the temperature data of the temperature measuring unit is an abnormal value in the first state, the driving unit moves the monitoring unit to the second state and acquires image data.

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