A pipe gallery manhole cover with smoke detection alarm function and its method

Abstract

The present invention discloses a pipe gallery manhole cover with a smoke sensing alarm function and a method thereof, belonging to the technical field of pipe gallery manhole covers, comprising a manhole seat and a manhole cover, wherein the manhole seat and one side edge of the manhole cover are movably connected by a hinge, a cylinder component is further connected between the manhole seat and the manhole cover, a sensing component for detecting smoke is provided in the manhole seat, an alarm component is provided on the manhole cover, and the sensing component is connected in series with the cylinder component and the alarm component; the present invention proposes a pipe gallery manhole cover with a smoke sensing alarm function and a method thereof, and at the same time utilizes the characteristic that the cylinder will rotate when the manhole cover is opened, and the kinetic energy generated by the rotation is transmitted on the first rotating shaft and the second rotating shaft through a bevel gear, so as to realize that when the manhole cover and the manhole seat are closed, the sensing head will rotate to the center position of the manhole seat, avoiding being set at the edge, resulting in inaccurate detection data; after the manhole cover is opened, the sensing head will rotate to the edge of the manhole seat, without affecting subsequent staff going down the well, avoiding the problem of causing obstacles.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe gallery manhole covers, and in particular to a pipe gallery manhole cover with a smoke sensing alarm function and a method thereof. Background Art

[0002] Regarding the intelligent cable manhole cover, CN201911327393.6 discloses an intelligent cable manhole cover for a substation with a smoke alarm. The first end of the hydraulic rod is connected to the hydraulic cylinder, and the second end of the hydraulic rod is abutted against the bottom of the lock hook. The locking device includes a key, a lock core, a lock hook and a keyhole that plays a supporting role. The lock core is fixedly arranged in the manhole cover, the key matches the keyhole, the keyhole passes through the lock core and the lock hook, the top of the lock hook is connected to the lock core, and the lock hook is provided with a limit portion protruding in the horizontal direction. The position of the locking piece is set between the manhole cover and the limit portion, and the side of the locking piece is fixed on the side wall of the cable shaft; the starting control end of the hydraulic device is connected to the electronic control device, a signal input end of the electronic control device is connected to the lock core, the hydraulic device is powered by a driving power supply, the driving power supply is fixed on the side wall of the cable shaft, the electronic control device is installed on the fixed block, and the smoke sensor is electrically connected to the electronic control device.

[0003] The above-mentioned intelligent cable manhole cover still has the following defects in actual use:

[0004] The smoke detection sensor detects smoke by being installed on the manhole cover, wherein the position of the sensor cannot be changed, and the manhole cover cannot be driven to open through sensor detection, and the two cannot form a linkage. Summary of the invention

[0005] The object of the present invention is to provide a pipe gallery manhole cover with a smoke sensing alarm function and a method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a pipe gallery manhole cover with a smoke sensing alarm function, comprising a manhole seat and a manhole cover, wherein the manhole seat and one side edge of the manhole cover are movably connected by a hinge, a cylinder component is further connected between the manhole seat and the manhole cover, a sensing component for detecting smoke is provided in the manhole seat, an alarm component is provided on the manhole cover, and the sensing component is connected in series with the cylinder component and the alarm component;

[0007] The sensing component is used to detect smoke and send the detected smoke signal to the cylinder component and the alarm component. After the cylinder component receives the smoke signal, the manhole cover rotates around the manhole seat, the manhole cover opens, and the alarm component emits sound and light alarms. The alarm component is also connected to the monitoring center through an underground pipeline network. The alarm component synchronously sends the location information and alarm information to the monitoring center for alarm.

[0008] Furthermore, two groups of cylinder components are provided, and the two groups of cylinder components are symmetrically distributed on both sides of the well seat. The cylinder components include a cylinder seat, a cylinder, a cylinder rod and a pin seat. The cylinder seat is installed on the well seat, and the pin shafts on both sides of the cylinder are inserted into the cylinder seat. The cylinder rod connected to the cylinder is movably connected to the pin seat, and the pin seat is installed on the well cover.

[0009] Furthermore, the induction assembly includes an induction support frame, a first rotating shaft, a second rotating shaft, a bevel gear, an induction rod, an induction head and a power supply component. The two sides of the induction support frame are respectively fixed to the well seat and the cylinder seat, one end of the first rotating shaft is fixed to the pin shaft port, the second rotating shaft passes through the bearing of the induction support frame, and the first rotating shaft and the second rotating shaft are meshed through the bevel gear.

[0010] The sensing rod is fixed to the other end of the second rotating shaft, the sensing head is mounted on the sensing rod, and the power supply component passes through the second rotating shaft and the sensing rod and is electrically connected to the sensing head;

[0011] When the cylinder rotates to drive the manhole cover to open, the first rotating shaft and the pin shaft rotate synchronously, and the second rotating shaft drives the sensing head to rotate to a position that fits the edge of the well seat. When the cylinder rotates in the other direction, the manhole cover closes the well seat and the sensing head rotates to the center position of the well seat.

[0012] Furthermore, the power supply component includes an upper power supply line, a lower power supply line, an upper conductive sheet, a lower conductive sheet and a limit frame, one end of the limit frame is fixed to the induction support frame, and the other end of the limit frame is inserted into the second rotating shaft and connected to the upper conductive sheet;

[0013] One end of the upper power supply line is connected to the upper conductive sheet, and the other end is connected to the underground power grid. The lower conductive sheet is in contact with the upper conductive sheet, and the lower conductive sheet is fixed in the second rotating shaft. One end of the lower power supply line is connected to the lower conductive sheet, and the other end of the lower power supply line passes through the sensing rod and is connected to the sensing head. The underground power grid supplies power to the sensing head through the lower conductive sheet and the upper conductive sheet.

[0014] Further, the alarm assembly includes an alarm light, an alarm speaker, a wireless transmission circuit board and a reinforcement frame, the reinforcement frame is fixed to the bottom surface of the manhole cover, and the reinforcement frame is located between the two cylinder components;

[0015] The warning light, the warning speaker and the wireless transmission circuit board are installed on the reinforcement frame, the wires connecting the warning light and the warning speaker are connected to the wireless transmission circuit board, and the wireless transmission circuit board is also connected to the air pump of the cylinder;

[0016] The wireless transmission circuit board receives the smoke detection signal from the sensor head. After receiving the smoke detection signal, it drives the alarm light and the alarm speaker to emit an audible and visual alarm, and synchronously transmits the alarm information to the monitoring center through the underground pipe network. At the same time, it also starts the air pump to fill the cylinder with gas, so that the cylinder rod extends and the manhole cover opens.

[0017] Furthermore, the axis of the first rotation axis is parallel to the plane formed by the rotation of the sensing rod, and the second rotation axis is perpendicular to the plane formed by the rotation of the sensing rod.

[0018] Furthermore, the sensing head adopts a gas-sensitive smoke sensor, including a semiconductor gas sensor, a contact combustion gas sensor and an electrochemical gas sensor, which converts the gas type and information related to its concentration into an electrical signal and transmits it wirelessly to a wireless transmission circuit board.

[0019] Another technology proposed by the present invention includes a method for a pipe gallery manhole cover with a smoke sensing alarm function, comprising the following steps:

[0020] S1: The manhole cover is closed, gas is extracted from the air pump of the cylinder, the cylinder rod is retracted into the cylinder, the cylinder rotates around the cylinder seat, the induction head rotates to the center of the manhole seat, and the manhole seat and the manhole cover are in a closed state;

[0021] S2: The sensor head detects smoke in real time. If smoke is detected, the sensor head sends the detection data to the wireless transmission circuit board via wireless, driving the alarm light and alarm speaker to emit sound and light alarm;

[0022] S3: The alarm information is transmitted synchronously with the monitoring center through the underground pipe network, and the air pump is started at the same time to fill the cylinder with gas, and the cylinder rod drives the manhole cover to open;

[0023] S4: The second rotating shaft drives the sensing head to rotate to the position where it fits the edge of the well seat, completing the alarm work.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention proposes a pipe gallery manhole cover with a smoke sensing alarm function and a method thereof, which detects smoke data through a sensing head. After detecting the smoke data, the smoke data is sent to a wireless transmission circuit board in real time. When a cylinder component opens the manhole cover, the alarm component sends an alarm signal and the position of the manhole cover where smoke appears to a monitoring center for subsequent processing.

[0026] 2. The present invention proposes a pipe gallery manhole cover with a smoke sensing alarm function and a method thereof. Since the upper power supply line and the upper conductive sheet are restricted by the limit frame, they do not rotate, while the lower conductive sheet and the lower power supply line rotate with the sensing head, thereby avoiding the problem of the wiring harness being entangled during the rotation of the sensing head. At the same time, the cylinder will rotate when opening the manhole cover, and the kinetic energy generated by the rotation is transmitted to the first rotating shaft and the second rotating shaft through the bevel gear, so that when the manhole cover and the manhole seat are closed, the sensing head will rotate to the center position of the manhole seat, avoiding being set at the edge, resulting in inaccurate detection data. After the manhole cover is opened, the sensing head will rotate to the edge of the manhole seat, which will not affect the subsequent staff going down the well and avoid causing obstructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall axonometric diagram of the present invention;

[0028] Figure 2 It is an axonometric view of the interior of the well seat of the present invention;

[0029] Figure 3 This is a state diagram of the manhole cover closing sensing head of the present invention;

[0030] Figure 4 This is a state diagram of the manhole cover opening sensing head of the present invention;

[0031] Figure 5 For the present invention Figure 1 A magnified image of point A;

[0032] Figure 6 This is a structural diagram of a manhole cover according to the present invention;

[0033] Figure 7 It is a structural diagram of the power supply component of the present invention.

[0034] In the figure: 1. well seat; 2. well cover; 3. cylinder component; 31. cylinder seat; 32. cylinder; 33. cylinder rod; 34. pin seat; 4. induction component; 41. induction support frame; 42. first rotating shaft; 43. second rotating shaft; 44. bevel gear; 45. induction rod; 46. induction head; 47. power supply component; 471. upper power supply line; 472. lower power supply line; 473. upper conductive sheet; 474. lower conductive sheet; 475. limit frame; 5. alarm component; 51. alarm light; 52. alarm speaker; 53. wireless transmission circuit board; 54. reinforcement frame. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to solve the problem that in the prior art, the smoke detection sensor is installed on the manhole cover to detect smoke, the position of the sensor cannot be changed, and the manhole cover cannot be opened by the sensor detection, and the two cannot form a linkage, the following technical solution is given, please refer to Figure 1-7 ;

[0037] A pipe gallery manhole cover with a smoke sensing alarm function comprises a manhole seat 1 and a manhole cover 2, wherein one side edge of the manhole seat 1 and the manhole cover 2 are movably connected via a hinge, a cylinder component 3 is further connected between the manhole seat 1 and the manhole cover 2, a sensing component 4 for detecting smoke is arranged in the manhole seat 1, an alarm component 5 is arranged on the manhole cover 2, and the sensing component 4 is connected in series with the cylinder component 3 and the alarm component 5;

[0038] The sensing component 4 is used to detect smoke and send the detected smoke signal to the cylinder component 3 and the alarm component 5. After the cylinder component 3 receives the smoke signal, the manhole cover 2 rotates around the manhole seat 1, the manhole cover 2 opens, and the alarm component 5 emits a sound and light alarm. The alarm component 5 is also connected to the monitoring center through the underground pipeline network. The alarm component 5 synchronously sends the location information and alarm information to the monitoring center for alarm.

[0039] Specifically, the gas in the well is detected by the set sensing component 4. After smoke is detected, the smoke signal is sent to the alarm component 5 and the cylinder component 3. When the cylinder component 3 opens the well cover 2, the alarm component 5 sends the alarm signal and the position of the well cover 2 where smoke appears to the monitoring center for subsequent processing.

[0040] There are two groups of cylinder components 3, which are symmetrically distributed on both sides of the well seat 1. The cylinder components 3 include a cylinder seat 31, a cylinder 32, a cylinder rod 33 and a pin seat 34. The cylinder seat 31 is installed on the well seat 1, and the pin shafts on both sides of the cylinder 32 are inserted into the cylinder seat 31. The cylinder rod 33 connected to the cylinder 32 is movably connected to the pin seat 34, and the pin seat 34 is installed on the well cover 2.

[0041] The induction assembly 4 includes an induction support frame 41, a first rotating shaft 42, a second rotating shaft 43, a bevel gear 44, a sensing rod 45, a sensing head 46 and a power supply component 47. The two sides of the induction support frame 41 are respectively fixed to the well seat 1 and the cylinder seat 31, one end of the first rotating shaft 42 is fixed to the pin shaft port, the second rotating shaft 43 passes through the bearing of the induction support frame 41, and the first rotating shaft 42 and the second rotating shaft 43 are meshed through the bevel gear 44;

[0042] The sensing rod 45 is fixed to the other end of the second rotating shaft 43, the sensing head 46 is mounted on the sensing rod 45, and the power supply component 47 passes through the second rotating shaft 43 and the sensing rod 45 and is electrically connected to the sensing head 46;

[0043] When the cylinder 32 rotates to drive the manhole cover 2 to open, the first rotating shaft 42 rotates synchronously with the pin shaft, and the second rotating shaft 43 drives the sensing head 46 to rotate to a position that fits the edge of the manhole seat 1. When the cylinder 32 rotates in the other direction, the manhole cover 2 closes the manhole seat 1, and the sensing head 46 rotates to the center position of the manhole seat 1.

[0044] The power supply component 47 includes an upper power supply line 471, a lower power supply line 472, an upper conductive sheet 473, a lower conductive sheet 474 and a limit frame 475. One end of the limit frame 475 is fixed to the induction support frame 41, and the other end of the limit frame 475 is inserted into the second rotating shaft 43 and connected to the upper conductive sheet 473.

[0045] One end of the upper power supply line 471 is connected to the upper conductive sheet 473, and the other end is connected to the underground power grid. The lower conductive sheet 474 is in contact with the upper conductive sheet 473, and the lower conductive sheet 474 is fixed in the second rotating shaft 43. One end of the lower power supply line 472 is connected to the lower conductive sheet 474, and the other end of the lower power supply line 472 passes through the sensing rod 45 and is connected to the sensing head 46. The underground power grid supplies power to the sensing head 46 through the lower conductive sheet 474 and the upper conductive sheet 473.

[0046] Specifically, the upper power supply line 471 and the upper conductive sheet 473 are restricted by the limit frame 475 and do not rotate, while the lower conductive sheet 474 and the lower power supply line 472 rotate with the sensing head 46, thereby avoiding the problem of the wiring harness being entangled during the rotation of the sensing head 46. At the same time, the cylinder 32 rotates when the manhole cover 2 is opened, and the kinetic energy generated by the rotation is transmitted to the first rotating shaft 42 and the second rotating shaft 43 through the bevel gear 44, so that when the manhole cover 2 and the manhole seat 1 are closed, the sensing head 46 rotates to the center position of the manhole seat 1, avoiding being set at the edge, resulting in inaccurate detection data. After the manhole cover 2 is opened, the sensing head 46 rotates to the edge of the manhole seat 1, which does not affect the subsequent staff going down the well and avoids the problem of causing obstacles.

[0047] The alarm assembly 5 includes an alarm light 51, an alarm speaker 52, a wireless transmission circuit board 53 and a reinforcement frame 54. The reinforcement frame 54 is fixed on the bottom surface of the manhole cover 2, and the reinforcement frame 54 is located between the two cylinder components 3;

[0048] The alarm light 51, the alarm speaker 52 and the wireless transmission circuit board 53 are mounted on the reinforcement frame 54. The wires connecting the alarm light 51 and the alarm speaker 52 are connected to the wireless transmission circuit board 53. The wireless transmission circuit board 53 is also connected to the air pump of the cylinder 32.

[0049] The wireless transmission circuit board 53 receives the smoke detection signal from the sensor head 46. After receiving the smoke detection signal, it drives the alarm light 51 and the alarm speaker 52 to emit an audible and visual alarm, and synchronously transmits the alarm information to the monitoring center through the underground pipeline network. At the same time, it also starts the air pump to fill the cylinder 32 with gas, so that the cylinder rod 33 extends and the manhole cover 2 opens.

[0050] The axis of the first rotating shaft 42 is parallel to the plane formed by the rotation of the sensing rod 45 , and the second rotating shaft 43 is perpendicular to the plane formed by the rotation of the sensing rod 45 .

[0051] The sensing head 46 uses a gas-sensitive smoke sensor, including a semiconductor gas sensor, a contact combustion gas sensor and an electrochemical gas sensor, which converts the gas type and information related to its concentration into an electrical signal and transmits it to the wireless transmission circuit board 53 wirelessly.

[0052] Specifically, the smoke data is detected by the sensor head 46. After the smoke data is detected, the smoke data is sent to the wireless transmission circuit board 53 in real time. The wireless transmission circuit board 53 controls the opening of the manhole cover 2 and the operation of the alarm light 51 and the alarm speaker 52, thereby realizing the alarm function.

[0053] Another technology proposed by the present invention includes a method for a pipe gallery manhole cover with a smoke sensing alarm function, comprising the following steps:

[0054] Step 1: The pipe gallery manhole cover is closed, gas is extracted from the air pump of the cylinder 32, the cylinder rod 33 is retracted into the cylinder 32, the cylinder 32 rotates around the cylinder seat 31, the induction head 46 rotates to the center position of the manhole seat 1, and the manhole seat 1 and the manhole cover 2 are in a closed state;

[0055] Step 2: The sensor head 46 detects smoke in real time. If smoke is detected, the sensor head 46 sends the detection data to the wireless transmission circuit board 53 via wireless, and drives the alarm light 51 and the alarm speaker 52 to emit an audible and visual alarm;

[0056] Step 3: The alarm information is transmitted synchronously with the monitoring center through the underground pipe network, and the air pump is started at the same time to fill the cylinder 32 with gas, so that the cylinder rod 33 drives the manhole cover 2 to open;

[0057] Step 4: The second rotating shaft 43 drives the sensor head 46 to rotate to a position where it fits the edge of the well seat 1, completing the alarm work.

[0058] In summary, the pipe gallery manhole cover with smoke sensing alarm function and method thereof of the present invention detects smoke data through the sensing head 46. After detecting the smoke data, the smoke data is sent to the wireless transmission circuit board 53 in real time. When the cylinder component 3 opens the manhole cover 2, the alarm component 5 sends the alarm signal and the position of the manhole cover 2 where smoke appears to the monitoring center for subsequent processing. The upper power supply line 471 and the upper conductive sheet 473 are restricted by the limit frame 475 and do not rotate, while the lower conductive sheet 474 and the lower power supply line 472 rotate with the sensing head 46, thereby avoiding the problem of the wiring harness being entangled during the rotation of the sensing head 46. At the same time, the cylinder 32 is rotated when the manhole cover 2 is opened, and the kinetic energy generated by the rotation is transmitted to the first rotating shaft 42 and the second rotating shaft 43 through the bevel gear 44, so that when the manhole cover 2 and the manhole seat 1 are closed, the sensing head 46 will rotate to the center position of the manhole seat 1, avoiding being set at the edge, resulting in inaccurate detection data. After the manhole cover 2 is opened, the sensing head 46 will rotate to the edge of the manhole seat 1, which will not affect the subsequent staff going down the well and avoid causing obstacles.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pipe gallery manhole cover with a smoke sensing alarm function, comprising a manhole seat (1) and a manhole cover (2), wherein one side edge of the manhole seat (1) and the manhole cover (2) are movably connected via a hinge, and characterized in that: A cylinder component (3) is also connected between the well seat (1) and the well cover (2); a smoke detecting sensor component (4) is provided in the well seat (1); an alarm component (5) is provided on the well cover (2); and the sensor component (4) is connected in series with the cylinder component (3) and the alarm component (5); The sensing component (4) is used to detect smoke and send the detected smoke signal to the cylinder component (3) and the alarm component (5). After the cylinder component (3) receives the smoke signal, the manhole cover (2) rotates around the manhole seat (1), the manhole cover (2) is opened, and the alarm component (5) emits a sound and light alarm. The alarm component (5) is also connected to the monitoring center through an underground pipe network. The alarm component (5) synchronously sends the location information and the alarm information to the monitoring center for alarm. The cylinder component (3) is provided with two groups. The two groups of cylinder components (3) are symmetrically distributed on both sides of the manhole seat (1). The cylinder component (3) includes a cylinder seat (31), a cylinder (32), a cylinder rod (33) and a pin seat (34). The cylinder seat (31) is installed on the manhole seat (1). The cylinder (3 2) The pins on both sides are inserted into the cylinder seat (31), the cylinder rod (33) connected to the cylinder (32) is movably connected to the pin seat (34), and the pin seat (34) is installed on the manhole cover (2); the sensing component (4) includes a sensing support frame (41), a first rotating shaft (42), a second rotating shaft (43), a bevel gear (44), a sensing rod (45), a sensing head (46) and a power supply component (47), the two sides of the sensing support frame (41) are respectively fixed to the manhole seat (1) and the cylinder seat (31), one end of the first rotating shaft (42) is fixed to the pin end, the second rotating shaft (43) passes through the bearing of the sensing support frame (41), the first rotating shaft (42) and the second rotating shaft (43) are meshed through the bevel gear (44), and the sensing The sensing rod (45) is fixed to the other end of the second rotating shaft (43), the sensing head (46) is mounted on the sensing rod (45), the power supply component (47) passes through the second rotating shaft (43) and the sensing rod (45) and is electrically connected to the sensing head (46), when the cylinder (32) rotates to drive the manhole cover (2) to open, the first rotating shaft (42) and the pin shaft rotate synchronously, the second rotating shaft (43) drives the sensing head (46) to rotate to a position where it fits the edge of the manhole seat (1), when the cylinder (32) rotates in the other direction, the manhole cover (2) closes the manhole seat (1), the sensing head (46) rotates to the center position of the manhole seat (1), the power supply component (47) includes an upper power supply line (471), a lower power supply line (472), an upper conductive sheet (473), and a lower conductive sheet (474). 4) and a limiting frame (475), one end of the limiting frame (475) is fixed on the induction support frame (41), the other end of the limiting frame (475) is inserted into the second rotating shaft (43) and connected to the upper conductive sheet (473), one end of the upper power supply line (471) is connected to the upper conductive sheet (473), and the other end is connected to the underground power grid, the lower conductive sheet (474) is in contact with the upper conductive sheet (473), and the lower conductive sheet (474) is fixed in the second rotating shaft (43), one end of the lower power supply line (472) is connected to the lower conductive sheet (474), and the other end of the lower power supply line (472) passes through the induction rod (45) and is connected to the induction head (46), and the underground power grid supplies power to the induction head (46) through the lower conductive sheet (474) and the upper conductive sheet (473).

2. The pipe gallery manhole cover with smoke sensing alarm function as claimed in claim 1, characterized in that: The alarm component (5) comprises an alarm light (51), an alarm speaker (52), a wireless transmission circuit board (53) and a reinforcement frame (54); the reinforcement frame (54) is fixed on the bottom surface of the manhole cover (2), and the reinforcement frame (54) is located between the two cylinder components (3); The alarm light (51), the alarm speaker (52) and the wireless transmission circuit board (53) are mounted on the reinforcement frame (54); the wires connecting the alarm light (51) and the alarm speaker (52) are connected to the wireless transmission circuit board (53); and the wireless transmission circuit board (53) is also connected to the air pump of the air cylinder (32); The wireless transmission circuit board (53) receives the smoke detection signal from the sensor head (46). After receiving the smoke detection signal, it drives the alarm light (51) and the alarm speaker (52) to emit an audible and visual alarm, and transmits the alarm information synchronously with the monitoring center through the underground pipe network. At the same time, it also starts the air pump to fill the cylinder (32) with gas, so that the cylinder rod (33) extends and the manhole cover (2) opens.

3. The pipe gallery manhole cover with smoke sensing alarm function as claimed in claim 1, characterized in that: The axis of the first rotating shaft (42) is parallel to a plane formed by the rotation of the sensing rod (45), and the second rotating shaft (43) is perpendicular to the plane formed by the rotation of the sensing rod (45).

4. The pipe gallery manhole cover with smoke sensing alarm function as claimed in claim 2, characterized in that: The sensing head (46) uses a gas-sensitive smoke sensor, including a semiconductor gas sensor, a contact combustion gas sensor, and an electrochemical gas sensor, which converts information related to the type of gas and its concentration into an electrical signal, and transmits it to the wireless transmission circuit board (53) in a wireless manner.

5. A method for operating the pipe gallery manhole cover with smoke sensing alarm function according to claim 4, characterized in that: The following steps are involved: S1: The pipe gallery manhole cover is in a closed state, gas is extracted from the air pump of the cylinder (32), the cylinder rod (33) is retracted into the cylinder (32), the cylinder (32) rotates around the cylinder seat (31), the sensor head (46) rotates to the center position of the manhole seat (1), and the manhole seat (1) and the manhole cover (2) are in a closed state; S2: The sensor head (46) detects smoke in real time. If smoke is detected, the sensor head (46) sends the detection data to the wireless transmission circuit board (53) via wireless, and drives the alarm light (51) and the alarm speaker (52) to emit an audible and visual alarm; S3: The alarm information is synchronously transmitted to the monitoring center through the underground pipe network, and the air pump is started to fill the cylinder (32) with gas, so that the cylinder rod (33) drives the manhole cover (2) to open; S4: The second rotating shaft (43) drives the sensing head (46) to rotate to a position where it fits the edge of the well seat (1), thereby completing the alarm operation.

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