Water pipe port retracting and releasing method and device

Abstract

The invention provides a water pipe port folding and unfolding method and device, and the method comprises the steps: pressing a cover plate at an opening position, enabling the cover plate to rotate downwards around a cover plate rotating shaft to enter a closing position, and locking the cover plate; the inner cover which is located on the lower side of the cover plate and provided with a water outlet port rotates around an inner cover rotating shaft along with rotation of the cover plate to enter a water outlet port retracting position through connection of a sliding handle between the cover plate and the inner cover; when the cover plate rotates upwards around the cover plate rotating shaft, the inner cover which is located on the lower side of the cover plate and provided with a water outlet port is driven to rotate around the inner cover rotating shaft along with rotation of the cover plate to enter a water outlet port release position through connection of a sliding handle between the cover plate and the inner cover when the cover plate rotates upwards around the cover plate rotating shaft. The structure is simple, operation is easy, the cover plate clamping fault occurring in unlocking can be recognized and eliminated in an auxiliary mode, and installation and maintenance are easy.

Description

Technical Field

[0001] This invention relates to the field of smart manhole covers, and more particularly to a method and apparatus for retracting and extending a water pipe port. Background Technology

[0002] Water transmission networks are widely used in fire protection, agricultural irrigation, and reclaimed water utilization. To ensure convenient, accurate, and safe water intake from water transmission networks, appropriate designs are needed for the protective covers at the water intake end, water pipe interfaces, flow control, and other aspects.

[0003] Patent application CN202110314844.3, entitled "Smart Firefighting Manhole Cover," discloses a manhole cover comprising a frame structure, a cover body, multiple movable blocks, a drive mechanism, a monitoring mechanism, and a control unit. The frame structure has a receiving cavity with a top opening. The cover body is placed over the opening, and multiple drainage holes are provided at the ends of the cover body. The drive mechanism is connected to the movable blocks, which move up and down along the height direction of the frame structure under the drive of the drive mechanism to close or open the drainage holes. The control unit is communicatively connected to an Internet of Things (IoT) system. The monitoring mechanism is used to monitor water flow and send water volume signals to the control unit, which acquires the water volume signals and controls the movement of the drive mechanism.

[0004] Patent application CN202120014361.7, entitled "A Manhole Cover for Smart Firefighting," discloses a manhole cover comprising a manhole opening. The inner wall of the manhole opening has a placement groove, a circular groove, and an annular groove. A sliding groove is also provided on the inner wall of the manhole opening, communicating with the annular groove. A disc is slidably connected to the inner wall of the placement groove. A circular tube is fixedly connected to the bottom of the disc, and a manhole cover body is slidably connected to the bottom of the circular tube. A through groove is provided at the top of the disc and the manhole cover body. The surface of the manhole cover body is slidably connected to the inner wall of the circular groove, and a movable plate is slidably connected to the inner wall of the annular groove. This invention, by setting up through grooves, a disc, a circular tube, and a locking block, allows firefighters to replenish water to fire trucks without opening the manhole cover body by rotating the disc to align the through groove on the disc with the through groove on the manhole cover body, achieving convenient water access.

[0005] Patent application CN201510501479.1, entitled "A Safe IoT-Based Smart Manhole Cover," describes a manhole cover comprising a cylindrical body with a pull-out hole and a normally open button on the bottom edge. The cover contains a battery, a controller, and a Wi-Fi module. The controller is connected to the battery, the normally open button, and the Wi-Fi module. A locking mechanism is located on the side wall of the cover, comprising a motor, a threaded rod connected to the motor shaft, and an internally threaded post fitted onto the threaded rod. The motor shaft is parallel to the plane of the manhole cover, and the internally threaded post is located on the side furthest from the center of the manhole cover. The controller is connected to the motor. This invention allows the manhole cover to be locked by the locking mechanism, reducing the possibility of theft and displacement. The manhole cover can trigger an alarm when opened and can simultaneously receive and transmit Wi-Fi signals. Interconnected network connections between manhole covers reduce the need for network transmission station construction and lower costs.

[0006] The drawbacks of existing manhole cover unlocking technology are: the opening and closing structure of the water outlet is complex, the unlocking and locking structure of the cover plate is complex, and it cannot identify and assist in eliminating the cover plate jamming fault that occurs during unlocking. Summary of the Invention

[0007] The method and apparatus provided in this invention overcome at least one of the following drawbacks of existing manhole cover technology: complex opening and closing structures for the water outlet, complex unlocking and locking structures for the cover plate, and inability to identify and assist in eliminating cover plate jamming faults during unlocking. The invention features a simple structure, is easy to operate, can identify and assist in eliminating cover plate jamming faults during unlocking, and is easy to install and maintain.

[0008] This invention provides a method for opening and closing water pipe ports, comprising: Step on the open cover to make it rotate downward around the cover's pivot axis into the closed position and lock it in place. The sliding handle between the cover and the inner cover allows the inner cover, which has a water outlet on the underside of the cover, to rotate around the inner cover's pivot axis as the cover rotates, entering the retracted position with the water outlet in place. Unlock the cover plate in the closed position so that it rotates upward around the cover plate pivot axis to enter the open position. When the cover plate rotates upward around the cover plate pivot axis, the sliding handle between the cover plate and the inner cover drives the inner cover, which is located on the lower side of the cover plate and has a water outlet port, to rotate around the inner cover pivot axis as the cover plate rotates and enter the water outlet port release position.

[0009] This invention provides a water pipe end retraction device, comprising: The retraction drive mechanism is used to drive the outlet port (44) included in the outlet port rotation mechanism to change position. It includes a cover plate (2) installed on the manhole cover (6), a cover plate shaft (22) connecting the cover plate (2) and the manhole cover (6), and a torsion spring (3) installed on the cover plate shaft (22). A water outlet rotating mechanism is used to adjust the position and tilt angle of the water outlet (44) and provide mounting support for the water outlet (44), comprising an inner cover (4) and the water outlet (44); characterized in that: The inner cover (4) is installed on the lower side of the cover plate (2). The end of the inner cover (4) away from the cover plate pivot (22) is rotatably connected to the inner cover support body through the inner cover pivot (43). The inner cover (4) is equipped with a water outlet port (44) that rotates with the inner cover. The inner cover (4) includes an inner cover handle hook (42) with a curved finger that slides within the curved finger of the cover plate handle hook (24) included in the cover plate (2), forming a sliding handle connection mechanism between the inner cover (4) and the cover plate (2). The retraction / extension drive mechanism and the outlet port rotation mechanism utilize the aforementioned sliding handle connection mechanism to perform the following actions: Step on the open cover to make it rotate downward around the cover's pivot axis into the closed position and lock it in place. The sliding handle connecting mechanism between the cover and the inner cover allows the inner cover, which is located on the underside of the cover and has a water outlet port, to rotate around the inner cover's pivot axis as the cover rotates and enter the water outlet port retracted position. Unlock the cover plate in the closed position so that it rotates upward around the cover plate pivot axis to enter the open position. When the cover plate rotates upward around the cover plate pivot axis, the sliding handle connecting mechanism between the cover plate and the inner cover drives the inner cover, which is located on the lower side of the cover plate and is equipped with a water outlet port, to rotate around the inner cover pivot axis as the cover plate rotates and enter the water outlet port release position.

[0010] The method and apparatus provided in this invention can overcome at least one of the shortcomings of existing manhole cover technology, such as complex opening and closing structures for the water outlet, complex unlocking and locking structures for the cover plate, and inability to identify and assist in eliminating cover plate jamming faults during unlocking. It has a simple structure, is easy to operate, can identify and assist in eliminating cover plate jamming faults during unlocking, and is easy to install and maintain.

[0011] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0013] Figure 1 This is a flowchart of a water pipe port opening and closing method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structural composition of the lock mechanism given in the embodiments of the present invention; Figure 3 This is a schematic diagram of the structure of the retraction and extension drive mechanism and the water outlet rotation mechanism in the retracted state of the water outlet port, as given in the embodiments of the present invention. Figure 4 This is a schematic diagram of the structural composition of the retraction and release drive mechanism and the water outlet rotation mechanism in the water outlet release state, as given in the embodiments of the present invention. Figure 5 This is a schematic diagram of the composition of the water outlet control module provided in the embodiment of the present invention.

[0014] In the picture, 1. Lock box; 2. Cover plate; 3. Torsion spring; 4. Inner cover; 11. Lock box body; 12. Lock tongue; 13. Lock tongue spring; 14. Cam shaft; 15. Lock tongue magnet; 16. Lock tongue sensing element; 17. Cover plate sensing element; 18. Cam; 21. Locking groove; 22. Cover plate pivot; 23. Cover plate magnet; 24. Cover plate handle hook; 41. Water hose connector; 42. Inner cover handle hook; 43. Inner cover pivot; 44. Water outlet port;

[0015] 5. Control module; 50. Lock mechanism; 51. Motor drive unit; 52. Lock tongue position detection unit; 53. Cover plate position detection unit; 54. Audio unit; 55. Digital processing unit; 56. Communication unit; 6. Manhole cover.

[0016] Example

[0017] The method and apparatus provided in this invention overcome at least one of the following drawbacks of existing manhole cover technology: complex opening and closing structures for the water outlet, complex unlocking and locking structures for the cover plate, and inability to identify and assist in eliminating cover plate jamming faults during unlocking. The invention features a simple structure, is easy to operate, can identify and assist in eliminating cover plate jamming faults during unlocking, and is easy to install and maintain.

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0019] The methods and apparatus provided by the present invention will be described below with reference to the accompanying drawings.

[0020] Example 1: A method for opening and closing water pipe ports An embodiment of a water pipe port retraction and extension method provided by the present invention is shown below. Figure 1 As shown, it includes: S110, step on the cover plate in the open position to make it rotate downward around the cover plate pivot axis to enter the closed position and be locked. The inner cover with the water outlet port located on the lower side of the cover plate is connected by a sliding handle through the cover plate and the inner cover to rotate around the inner cover pivot axis as the cover plate rotates to enter the water outlet port retracted position. S120, unlock the cover plate in the closed position so that it rotates upward around the cover plate pivot axis to enter the open position. When the cover plate rotates upward around the cover plate pivot axis, the sliding handle between the cover plate and the inner cover drives the inner cover with the water outlet port located on the lower side of the cover plate to rotate around the inner cover pivot axis with the cover plate and enter the water outlet port release position.

[0021] Specifically, the cover plate is installed on the manhole cover. One side of the cover plate is rotatably connected to the manhole cover via a cover plate pivot. The other side of the cover plate contains a locking groove for locking the cover plate.

[0022] An inner cover is installed on the underside of the cover plate. One side of the inner cover is connected to the inner cover support via an inner cover pivot. The other side of the inner cover has a sliding contact connection with the back of the cover plate near the pivot. A water outlet is installed on the inner cover. The position and angle of the water outlet change as the inner cover rotates.

[0023] When the cover is in the closed position, the water outlet port located on the inner cover at the bottom of the cover faces upward; when the cover is in the open position, the water outlet port located on the inner cover at the bottom side of the cover is tilted. The tilted position of the water outlet port makes it easier to connect or remove the external water pipe from the water outlet port.

[0024] The method provided in this embodiment, wherein, The sliding handle connection between the cover plate and the inner cover allows the inner cover, which has a water outlet located on the underside of the cover plate, to rotate around the inner cover's pivot point as the cover plate rotates, moving into the retracted position with the water outlet retracted. Specifically, this includes: Under the influence of gravity at the water outlet port, the inner cover rotates downward around the inner cover axis as the cover plate rotates downward. The inner cover handle hook slides downward within the cover plate handle hook. The water outlet port installed on the inner cover moves into the retracted position as the inner cover rotates downward. When the cover plate rotates upward around its pivot axis, the sliding handle between the cover plate and the inner cover drives the inner cover, which has a water outlet port located on the lower side of the cover plate, to rotate around the pivot axis of the inner cover and enter the water outlet port release position. Specifically, this includes: When the cover plate rotates upward around the cover plate axis under the action of the cover plate torsion spring, the inner cover is tilted and rotates upward around the inner cover axis. The inner cover handle hook slides upward inside the cover plate handle hook. The water outlet port installed on the inner cover enters the water outlet port release position as the inner cover rotates. The inner cover handle hook hooks the cover plate handle hook in the water outlet port release position to prevent it from rotating further upward.

[0025] To facilitate the adjustment of the water outlet port's position between the retracted and released positions, a flexible hose is used to connect the water outlet port to the water supply pipeline under the manhole cover.

[0026] The inner cover, at the release position of the water outlet port, limits the cover plate to prevent it from rotating further upward, including: The inner cover includes an inner cover handle hook that hooks onto the cover plate handle hook in a handle manner, thereby preventing the cover plate (2) from rotating further upward.

[0027] Specifically, see Figure 3 and Figure 4 As shown, the cover plate (2) includes a cover plate hook (24), and the inner cover (4) includes an inner cover hook (42). When the cover plate (2) is opened upward under the drive of the torsion spring (3), the cover plate hook (24) pushes the inner cover (4) to rotate upward. After the inner cover (4) rotates upward to the predetermined position, the inner cover hook (42) hooks the cover plate hook (24) in a hook manner, thereby preventing the cover plate (2) from rotating upward further.

[0028] The method provided in this embodiment, wherein, The stepping on the open cover causes it to rotate downwards around the cover's pivot axis into the closed position and be locked. Specifically, this includes: The latch is pressed against the lip of the lock groove on the cover plate to retract into the tongue cavity, and then the latch is pushed into the lock groove on the cover plate by the spring. The process of unlocking the cover plate in the closed position and rotating it upwards around the cover plate's pivot axis to enter the open position includes: Unlocking steps: Rotate the cam so that the cam's centroid changes from pointing in the direction of the bolt extension to pointing in the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. Locking procedure: Rotate the cam so that the cam's centroid changes from pointing in the direction of the bolt extension to pointing in the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. The cam's telecentric point is the point on the cam's cam surface that is farthest from the cam's axis of rotation.

[0029] See Figure 2 As shown, the lock box (1) includes a lock tongue (12), a cam (18), a lock tongue spring (13) and a bracket. The bracket includes a slide groove and provides mounting support for the lock tongue (12), the cam (18) and the lock tongue spring (13). The lock tongue (12) is a component with a through hole. The cam (18) is located in the through hole. The lock tongue spring (13) is provided on the left side of the lock tongue. The cam (18) is mounted on the cam shaft (14), which is driven by a DC motor and controlled by a motor drive module (52).

[0030] During the rotation of the cam (18), the cam's distal point changes from pointing towards the retraction of the latch to pointing towards the extension of the latch. The latch spring (13) pushes the latch (12) to move to the right along the slide and extend out of the latch cavity. At this time, the top of the latch (12) is outside the lock box (1). During the process of pushing the locking groove (21) contained in the cover plate (2) to the locking position by rotating the cover plate, the locking tongue (12) retracts into the tongue cavity under the pressure of the locking groove lip on the cover plate. Then, the locking tongue (12) enters the locking groove (21) on the cover plate under the push of the locking tongue spring (13) and locks the cover plate (2).

[0031] As the cam (18) rotates, changing the direction of the cam's centroid from pointing towards the extension of the latch to pointing towards the retraction of the latch, the convex surface of the cam (18) pushes the latch along the slide groove and moves it out of the lock groove (21) on the cover plate, thus releasing the lock on the cover plate (2).

[0032] During the rotation of the cam (18), the cam's distal point changes from pointing towards the extension of the latch to pointing towards the retraction of the latch. The convex surface of the cam (18) pushes the latch (12) to move along the groove and compresses the latch spring (13) located on the left side of the latch (12).

[0033] See Figure 3 As shown, the cover plate (2) of the present invention is a cover plate used to close the water outlet port (44).

[0034] In the locked state, the latch (12) extending from the lock box (1) enters the lock groove on the cover plate (2), preventing the cover plate (2) from opening; In the unlocked state, see Figure 4 As shown, the latch (12) moves out of the lock groove (21) on the cover plate (2), and the cover plate (2) opens under the drive of the torsion spring (3).

[0035] The cover plate (2) is rotatably connected to the manhole cover via the cover plate pivot (22).

[0036] See below the cover plate (2). Figure 4 As shown, an inner cover (4) is installed, and the inner cover (4) is rotatably connected to the lower side of the manhole cover through the inner cover pivot (43); A hose connector (41) and a water outlet port (44) are installed on the inner cover (4); the hose connector (41) is connected to the water pipe in the well through the hose, and the flexible connection facilitates the angle adjustment of the water outlet port (44); the water outlet port (44) has a water pipe connection slot to facilitate the easy connection between the water outlet port and the water receiving end.

[0037] In this embodiment, the cover plate of the present invention is a cover plate (2) for protecting the water intake. The cover plate of the present invention can also be a component for sealing the port of a specific space, including protective cover plates for the ports of various liquid oil or chemical pipelines, and inlet and outlet cover plates of storage boxes.

[0038] The method provided in this embodiment, wherein, The rotating cam, which changes its distal point from pointing towards the retraction of the latch to pointing towards the extension of the latch, and utilizes the latch spring to push the latch along the slide groove and extend out of the latch cavity, specifically includes: Before performing the operation of rotating the cam to change the direction of the cam's centroid from pointing towards the retraction of the latch to pointing towards the extension of the latch, and using the latch spring to push the latch along the slide and extend out of the latch cavity, confirm that the cover is in the open position.

[0039] In the locked state, the cover plate (2) is limited by the locking tongue (12) inserted into the locking groove (21) on the cover plate (2). In this locked state, the cover plate (2) is abutting against the manhole cover body. See Figure 3 As shown, when abnormal situations occur, such as the cover plate pivot (22) used by the cover plate (2) being jammed and unable to rotate, or the cover plate (2) and the manhole cover body being stuck together due to snow or ice, the cover plate (2) will not be able to open under the drive of the torsion spring (3).

[0040] If, after the latch (12) is retracted into the lock box (1), the cover plate (2) cannot be opened automatically by the drive of the torsion spring (3), the cam (18) is still rotated so that the cam's centroid changes from pointing in the direction of the latch retraction to pointing in the direction of the latch extension. The latch spring (13) pushes the latch along the slide and extends out of the tongue cavity, thus locking the cover plate (2) again.

[0041] In order to avoid the situation where the cover plate (2) is locked again if the cover plate (2) cannot be opened under the drive of the torsion spring (3), it is necessary to confirm that the cover plate (2) is in the open state before performing the operation of rotating the cam (18) so that the cam's centroid changes from pointing to the direction of the latch retraction to pointing to the direction of the latch extension, and using the latch spring (13) to push the latch along the slide and extend out of the tongue cavity.

[0042] The method provided in this embodiment, wherein, The operation of confirming that the cover is in the open state specifically includes: Read the output of the bolt position sensor and use its signal to confirm that the bolt has moved out of the lock slot. Then, read the output of the cover plate position sensor and make the following judgment: If the output signal level of the cover plate position sensor is the level L2 corresponding to the cover plate being in the open position, then it is confirmed that the cover plate is in the open state. If the output signal level of the cover plate position sensor is the same as the level L1 corresponding to the cover plate being in the locked position, then it is confirmed that the cover plate is in the locked state.

[0043] Specifically, the digital processing unit (55) reads the output of the latch position sensor through the latch position detection unit (52), and uses the read latch position sensor output signal to confirm that the latch has moved out of the lock slot; then, the digital processing unit (55) reads the output signal of the cover plate position sensor through the cover plate position detection unit (53), and makes the following judgment: If the output signal level of the cover plate position detection unit (53) is the level L2 corresponding to the cover plate being in the open position, then it is confirmed that the cover plate is in the open state; If the output signal level of the cover plate position detection unit (53) is the level L1 corresponding to the cover plate being in the locked position, then it is confirmed that the cover plate is in an abnormal locking state.

[0044] The cover plate position detection unit (53) performs anti-interference or de-jitter processing on the output signal of the cover plate position sensor; The latch position detection unit (52) performs anti-interference or de-jitter processing on the output signal of the latch position sensor.

[0045] See Figure 2 As shown, the latch position sensor includes a latch magnet (15) and a latch sensing element (16), wherein the latch sensing element (16) is a Hall element; specifically, the latch sensing element (16) is a Hall switch; the latch magnet (15) is mounted on the latch (12) and moves with the latch (12), while the latch sensing element (16) is mounted on the latch slide rail or the latch bracket and does not move.

[0046] The cover plate position sensor includes a cover plate magnet (23) and a cover plate sensing element (17), wherein the cover plate sensing element (17) is a Hall element; specifically, the cover plate sensing element (17) is a Hall switch; the cover plate magnet (23) is mounted on the cover plate (2) and moves with the cover plate (2), while the cover plate sensing element (17) is mounted on the lock box and does not move.

[0047] The operation of using the output signal of the bolt position sensor to confirm that the bolt has moved out of the bolt slot specifically includes: Read the output of the latch sensing element (16). If the output of the latch sensing element (16) is high, it confirms that the latch is in the state of being removed from the lock slot; or Read the output of the latch sensing element (16). If the output of the latch sensing element (16) is low, it is confirmed that the latch is in the state of being removed from the lock slot. Whether a high-level or low-level signal is used to determine if the bolt is out of the lock slot depends on the preset level or the type of Hall switch used.

[0048] In the step of confirming that the cover plate (2) is in the open state, the output signal level of the cover plate position sensor is the output level of the cover plate sensing element (17), specifically the output level of the Hall switch. The output level of the Hall switch corresponding to the open position of the cover plate (2) is represented as level L2, and level L2 is predetermined to be the low level output by the Hall switch. In other words, the cover plate is confirmed to be in the open state when the output level of the Hall switch is low. In the step of confirming that the cover plate (2) is in the open state, the output signal level of the cover plate position sensor is the output level of the cover plate sensing element (17), specifically the output level of the Hall switch. When the cover plate (2) is in the locked position, the output level of the Hall switch is represented as level L1, and level L1 is predetermined to be the high level output of the Hall switch, or in other words, the cover plate is confirmed to be in the locked state when the output level of the Hall switch is high.

[0049] The method provided in this embodiment, wherein, After confirming that the cover is in an abnormally locked state, perform the following operations: Stop driving the bolt (12) into the locked position; The control audio unit (54) issues a voice or sound prompt indicating that the cover (2) is in an abnormally locked state; and / or The control audio unit (54) provides instructions via voice on how to open the cover using manual intervention.

[0050] Specifically, if the cover plate is confirmed to be locked when the latch is already out of the lock groove, it is determined that the cover plate (2) is abnormally opened. Furthermore, in order to implement subsequent manual unlocking, a prompt is issued by voice or sound indicating that the cover (2) has failed to enter the open state.

[0051] Specifically, see Figure 5 As shown, the control module (5) includes an audio unit (54) that provides instructions on how to open the cover by manual intervention in a voice manner, including providing the phone number to be dialed or providing instructions on how to push, pull, squeeze or pry a specific component manually.

[0052] The method provided in this embodiment, wherein, After confirming that the cover is in an abnormally locked state, perform the following operations: Stop driving the bolt (12) into the locked position; The control communication unit (56) establishes a communication connection with the smartphone; The communication unit (56) establishes a communication connection with the smartphone, sends the cover plate abnormal locking information to the smartphone, and outlines the steps to remove the cover plate abnormal locking.

[0053] The method provided in this embodiment of the invention is specifically executed by the control module (5), see [link to relevant documentation]. Figure 5 As shown, the control module (5) includes a motor drive unit (51), a latch position detection unit (52), a cover plate position detection unit (53), an audio unit (54), a digital processing unit (55), and a communication unit (56); the motor drive unit (51) includes a DC switch circuit for controlling the start and stop of the motor, and controls the DC motor that drives the cam (18) to rotate; the latch position detection unit (52) includes a latch position sensor, see Figure 2 As shown, the latch position sensor includes a latch magnet (15) and a latch sensing element (16), wherein the latch sensing element (16) is a Hall element; specifically, the latch sensing element (16) is a Hall switch; the cover plate position detection unit (53) includes a cover plate position sensor, see Figure 2 As shown, the cover plate position sensor includes a cover plate magnet (23) and a cover plate sensing element (17), wherein the cover plate sensing element (17) is a Hall element; the digital processing unit (55) includes a digital processor circuit, the digital processing unit (55) uses the position information provided by the latch position detection unit (52) to determine the position of the latch (12), the digital processing unit (55) uses the position information provided by the cover plate position detection unit (53) to determine the position of the cover plate (2), and the digital processing unit (55) controls the rotation of the motor through the motor drive unit (51), thereby controlling the position of the latch (12).

[0054] The control module (5) uses its included communication unit (56) to receive unlocking commands. The communication unit (56) includes a wireless communication module, such as Bluetooth or WIFI, to transmit the unlocking control commands.

[0055] Locking mechanism (50), see Figure 2 and Figure 5 As shown, it includes a latch (12), a cam (18), a latch spring (13) and a bracket. The bracket includes a slide groove and provides mounting support for the latch (12), the cam (18) and the latch spring (13). The latch (12) is a component with a through hole. The cam (18) is located in the through hole. The latch spring (13) is provided on the left side of the latch. The cam (18) is mounted on the cam shaft (14), which is driven by a DC motor and controlled by a motor drive module (52).

[0056] In the method described in this embodiment, see [link to relevant documentation]. Figure 5 As shown, the control module (5), the locking mechanism (50) and the cover plate (2) are all installed on the manhole cover (6), with the manhole cover (6) serving as its installation support; or, in other words, the control module (5), the locking mechanism (50) and the cover plate (2) are components of the manhole cover (6).

[0057] Example 2: A water pipe port retraction device An embodiment of a water pipe port retraction device provided by the present invention includes: The retraction drive mechanism is used to drive the outlet port (44) included in the outlet port rotation mechanism to change position. It includes a cover plate (2) installed on the manhole cover (6), a cover plate shaft (22) connecting the cover plate (2) and the manhole cover (6), and a torsion spring (3) installed on the cover plate shaft (22). A water outlet rotating mechanism is used to adjust the position and tilt angle of the water outlet (44) and provide mounting support for the water outlet (44), comprising an inner cover (4) and the water outlet (44); characterized in that: The inner cover (4) is installed on the lower side of the cover plate (2). The end of the inner cover (4) away from the cover plate pivot (22) is rotatably connected to the inner cover support body through the inner cover pivot (43). The inner cover (4) is equipped with a water outlet port (44) that rotates with the inner cover. The inner cover (4) includes an inner cover handle hook (42) with a curved finger that slides within the curved finger of the cover plate handle hook (24) included in the cover plate (2), forming a sliding handle connection mechanism between the inner cover (4) and the cover plate (2). The retraction / extension drive mechanism and the outlet port rotation mechanism utilize the aforementioned sliding handle connection mechanism to perform the following actions: Step on the open cover to make it rotate downward around the cover's pivot axis into the closed position and lock it in place. The sliding handle connecting mechanism between the cover and the inner cover allows the inner cover, which is located on the underside of the cover and has a water outlet port, to rotate around the inner cover's pivot axis as the cover rotates and enter the water outlet port retracted position. Unlock the cover plate in the closed position so that it rotates upward around the cover plate pivot axis to enter the open position. When the cover plate rotates upward around the cover plate pivot axis, the sliding handle connecting mechanism between the cover plate and the inner cover drives the inner cover, which is located on the lower side of the cover plate and is equipped with a water outlet port, to rotate around the inner cover pivot axis as the cover plate rotates and enter the water outlet port release position. The sliding handle connection mechanism formed between the inner cover (4) and the cover plate (2) is the sliding handle connection mechanism between the retraction drive mechanism and the water outlet rotation mechanism.

[0058] The inner cover (4) is rotatably connected to the inner cover support body through the inner cover pivot (43) at one end away from the cover plate pivot (22). The inner cover support body can be the manhole cover body or a support component installed on the manhole cover body.

[0059] Specifically, the cover plate is installed on the manhole cover. One side of the cover plate is rotatably connected to the manhole cover via a cover plate pivot. The other side of the cover plate contains a locking groove for locking the cover plate.

[0060] An inner cover is installed on the underside of the cover plate. One side of the inner cover is connected to the inner cover support via an inner cover pivot. The other side of the inner cover has a sliding contact connection with the back of the cover plate near the pivot. A water outlet is installed on the inner cover. The position and angle of the water outlet change as the inner cover rotates.

[0061] When the cover is in the closed position, the water outlet port located on the inner cover at the bottom of the cover faces upward; when the cover is in the open position, the water outlet port located on the inner cover at the bottom side of the cover is tilted. The tilted position of the water outlet port makes it easier to connect or remove the external water pipe from the water outlet port. The apparatus provided in this embodiment is characterized in that, The sliding handle connection mechanism, in the process of allowing the inner cover (4) with the water outlet port located on the lower side of the cover plate to rotate around the inner cover pivot (43) and enter the water outlet port retracted position through the sliding handle connection between the cover plate (2) and the inner cover (4), has the following connection method: Under the gravity of the water outlet port, the inner cover (4) rotates downward around the inner cover pivot (43) as the cover plate (2) rotates downward. The inner cover handle hook (42) slides downward inside the cover plate handle hook (24). The water outlet port (44) installed on the inner cover enters the retracted position of the water outlet port (44) as the inner cover rotates downward. The sliding handle connection mechanism, when the cover plate rotates upward around the cover plate's pivot axis, drives the inner cover, which is located on the lower side of the cover plate and has a water outlet port, to rotate around the inner cover's pivot axis and enter the water outlet port release position. The connection method is as follows: When the cover plate (2) rotates upward around the cover plate pivot (22) under the action of the cover plate torsion spring (3), the inner cover is tilted and rotates upward around the inner cover pivot. The inner cover handle hook (42) slides upward inside the cover plate handle hook (24). The water outlet port (44) installed on the inner cover (4) enters the water outlet port (44) release position as the inner cover rotates. The inner cover handle hook (42) hooks the cover plate handle hook (24) at the water outlet port release position to prevent it from rotating further upward. To facilitate the adjustment of the water outlet port's position between the retracted and released positions, a flexible hose is used to connect the water outlet port to the water supply pipeline under the manhole cover.

[0062] The inner cover, at the release position of the water outlet port, limits the cover plate to prevent it from rotating further upward, including: The inner cover includes an inner cover handle hook that hooks onto the cover plate handle hook in a handle manner, thereby preventing the cover plate (2) from rotating further upward.

[0063] Specifically, see Figure 3 and Figure 4 As shown, the cover plate (2) includes a cover plate hook (24), and the inner cover (4) includes an inner cover hook (42). When the cover plate (2) is opened upward under the drive of the torsion spring (3), the cover plate hook (24) pushes the inner cover (4) to rotate upward. After the inner cover (4) rotates upward to the predetermined position, the inner cover hook (42) hooks the cover plate hook (24) in a hook manner, thereby preventing the cover plate (2) from rotating upward further.

[0064] To facilitate the adjustment of the water outlet port's position between the retracted and released positions, a flexible hose is used to connect the water outlet port to the water supply pipeline under the manhole cover.

[0065] The device provided in this embodiment further includes a locking mechanism (50) and a control module (5); characterized in that, The locking mechanism (50) includes a latch (12), a cam (18), a latch spring (13) and a DC motor for driving the cam (18) for unlocking and locking operations of the cover plate (2); During the process of pressing down on the open cover plate to rotate it downwards around the cover plate's pivot axis into the closed position and lock it in place, the specific operations performed by the locking mechanism (50) include: The latch is pressed against the lip of the lock groove on the cover plate to retract into the tongue cavity, and then the latch is pushed into the lock groove on the cover plate by the spring. The control module (5) includes a motor drive unit (51), a latch position detection unit (52), a cover plate position detection unit (53), a digital processing unit (55), and a communication unit (56). The control module (5) performs the following specific controls on the locking mechanism (50): Unlocking operation: Rotate the cam (18) so that the cam's centroid changes from pointing towards the direction of the bolt extension to pointing towards the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. Locking operation: Rotate the cam (18) so that the cam's centroid changes from pointing to the direction of the bolt extension to pointing to the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. The cam's telecentric point is the point on the cam's cam surface that is farthest from the cam's axis of rotation.

[0066] See Figure 2 As shown, the lock box (1) includes a lock tongue (12), a cam (18), a lock tongue spring (13) and a bracket. The bracket includes a slide groove and provides mounting support for the lock tongue (12), the cam (18) and the lock tongue spring (13). The lock tongue (12) is a component with a through hole. The cam (18) is located in the through hole. The lock tongue spring (13) is provided on the left side of the lock tongue. The cam (18) is mounted on the cam shaft (14), which is driven by a DC motor and controlled by a motor drive module (52).

[0067] During the rotation of the cam (18), the cam's distal point changes from pointing towards the retraction of the latch to pointing towards the extension of the latch. The latch spring (13) pushes the latch (12) to move to the right along the slide and extend out of the latch cavity. At this time, the top of the latch (12) is outside the lock box (1). During the process of pushing the locking groove (21) contained in the cover plate (2) to the locking position by rotating the cover plate, the locking tongue (12) retracts into the tongue cavity under the pressure of the locking groove lip on the cover plate. Then, the locking tongue (12) enters the locking groove (21) on the cover plate under the push of the locking tongue spring (13) and locks the cover plate (2).

[0068] As the cam (18) rotates, changing the direction of the cam's centroid from pointing towards the extension of the latch to pointing towards the retraction of the latch, the convex surface of the cam (18) pushes the latch along the slide groove and moves it out of the lock groove (21) on the cover plate, thus releasing the lock on the cover plate (2).

[0069] During the rotation of the cam (18), the cam's distal point changes from pointing towards the extension of the latch to pointing towards the retraction of the latch. The convex surface of the cam (18) pushes the latch (12) to move along the groove and compresses the latch spring (13) located on the left side of the latch (12).

[0070] See Figure 3 As shown, the cover plate (2) of the present invention is a cover plate used to close the water outlet port (44).

[0071] In the locked state, the latch (12) extending from the lock box (1) enters the lock groove on the cover plate (2), preventing the cover plate (2) from opening; In the unlocked state, see Figure 4As shown, the latch (12) moves out of the lock groove (21) on the cover plate (2), and the cover plate (2) opens under the drive of the torsion spring (3).

[0072] The cover plate (2) is rotatably connected to the manhole cover via the cover plate pivot (22).

[0073] See below the cover plate (2). Figure 4 As shown, an inner cover (4) is installed, and the inner cover (4) is rotatably connected to the lower side of the manhole cover through the inner cover pivot (43); A hose connector (41) and a water outlet port (44) are installed on the inner cover (4); the hose connector (41) is connected to the water pipe in the well through the hose, and the flexible connection facilitates the angle adjustment of the water outlet port (44); the water outlet port (44) has a water pipe connection slot to facilitate the easy connection between the water outlet port and the water receiving end.

[0074] See Figure 3 and Figure 4 As shown, the cover plate (2) includes a cover plate hook (24), and the inner cover (4) includes an inner cover hook (42). When the cover plate (2) is opened upward under the drive of the torsion spring (3), the cover plate hook (24) pushes the inner cover (4) to rotate upward. After the inner cover (4) rotates upward to the predetermined position, the inner cover hook (42) hooks the cover plate hook (24) in a hand-like manner to prevent the cover plate (2) from rotating upward further.

[0075] In this embodiment, the cover plate of the present invention is a cover plate (2) for protecting the water intake. The cover plate of the present invention can also be a component for sealing the port of a specific space, including protective cover plates for the ports of various liquid oil or chemical pipelines, and inlet and outlet cover plates of storage boxes.

[0076] The apparatus provided in this embodiment is characterized in that, The motor drive unit (51) included in the control module (5) is electrically connected to the DC motor included in the lock mechanism (50), and the DC motor drives the cam (18) to rotate through the cam shaft (14); Before the control module (5) performs the operation of rotating the cam so that the cam's centroid changes from pointing towards the retraction of the latch to pointing towards the extension of the latch, and using the latch spring to push the latch along the slide and extend out of the tongue cavity, it uses its included cover plate position detection unit (53) and digital processing unit (55) to perform the operation of confirming that the cover plate is in the open state.

[0077] In the locked state, the cover plate (2) is limited by the locking tongue (12) inserted into the locking groove (21) on the cover plate (2). In this locked state, the cover plate (2) is abutting against the manhole cover body. See Figure 3As shown, when abnormal situations occur, such as the cover plate pivot (22) used by the cover plate (2) being jammed and unable to rotate, or the cover plate (2) and the manhole cover body being stuck together due to snow or ice, the cover plate (2) will not be able to open under the drive of the torsion spring (3).

[0078] If, after the latch (12) is retracted into the lock box (1), the cover plate (2) cannot be opened automatically by the drive of the torsion spring (3), the cam (18) is still rotated so that the cam's centroid changes from pointing in the direction of the latch retraction to pointing in the direction of the latch extension. The latch spring (13) pushes the latch along the slide and extends out of the tongue cavity, thus locking the cover plate (2) again.

[0079] In order to avoid the situation where the cover plate (2) is locked again if the cover plate (2) cannot be opened under the drive of the torsion spring (3), it is necessary to confirm that the cover plate (2) is in the open state before performing the operation of rotating the cam (18) so that the cam's centroid changes from pointing to the direction of the latch retraction to pointing to the direction of the latch extension, and using the latch spring (13) to push the latch along the slide and extend out of the tongue cavity.

[0080] The apparatus provided in this embodiment is characterized in that, The control module (5) includes a latch position detection unit (52) which is electrically connected to a latch sensing element (16) installed in the lock mechanism (50). The control module (5) includes a cover plate position detection unit (53) which is electrically connected to a cover plate sensing element (17) installed on the side of the cover plate (2) that does not move with the cover plate (2). The control module (5) includes a digital processing unit (55) that is electrically connected to the latch position detection unit (52) and the cover plate position detection unit (53); The operation performed by the control module (5) to confirm that the cover is in the open state specifically includes: The digital processing unit (55) reads the output of the bolt position sensor through the bolt position detection unit (52), and uses the read bolt position sensor output signal to confirm that the bolt has moved out of the lock slot; then, the digital processing unit (55) reads the output signal of the cover plate position sensor through the cover plate position detection unit (53), and makes the following judgment: If the output signal level of the cover plate position detection unit (53) is the level L2 corresponding to the cover plate being in the open position, then it is confirmed that the cover plate is in the open state; If the output signal level of the cover plate position detection unit (53) is the level L1 corresponding to the cover plate being in the locked position, then it is confirmed that the cover plate is in the locked state.

[0081] The cover plate position detection unit (53) performs anti-interference or de-jitter processing on the output signal of the cover plate position sensor; The latch position detection unit (52) performs anti-interference or de-jitter processing on the output signal of the latch position sensor.

[0082] See Figure 2 As shown, the latch position sensor includes a latch magnet (15) and a latch sensing element (16), wherein the latch sensing element (16) is a Hall element; specifically, the latch sensing element (16) is a Hall switch; the latch magnet (15) is mounted on the latch (12) and moves with the latch (12), while the latch sensing element (16) is mounted on the latch slide rail or the latch bracket and does not move.

[0083] The cover plate position sensor includes a cover plate magnet (23) and a cover plate sensing element (17), wherein the cover plate sensing element (17) is a Hall element; specifically, the cover plate sensing element (17) is a Hall switch; the cover plate magnet (23) is mounted on the cover plate (2) and moves with the cover plate (2), while the cover plate sensing element (17) is mounted on the lock box and does not move.

[0084] The operation of using the output signal of the bolt position sensor to confirm that the bolt has moved out of the bolt slot specifically includes: Read the output of the latch sensing element (16). If the output of the latch sensing element (16) is high, it confirms that the latch is in the state of being removed from the lock slot; or Read the output of the latch sensing element (16). If the output of the latch sensing element (16) is low, it is confirmed that the latch is in the state of being removed from the lock slot. Whether a high-level or low-level signal is used to determine if the bolt is out of the lock slot depends on the preset level or the type of Hall switch used.

[0085] In the step of confirming that the cover plate (2) is in the open state, the output signal level of the cover plate position sensor is the output level of the cover plate sensing element (17), specifically the output level of the Hall switch. The output level of the Hall switch corresponding to the open position of the cover plate (2) is represented as level L2, and level L2 is predetermined to be the low level output by the Hall switch. In other words, the cover plate is confirmed to be in the open state when the output level of the Hall switch is low. In the step of confirming that the cover plate (2) is in the open state, the output signal level of the cover plate position sensor is the output level of the cover plate sensing element (17), specifically the output level of the Hall switch. When the cover plate (2) is in the locked position, the output level of the Hall switch is represented as level L1, and level L1 is predetermined to be the high level output of the Hall switch, or in other words, the cover plate is confirmed to be in the locked state when the output level of the Hall switch is high.

[0086] The apparatus provided in this embodiment is characterized in that, The digital processing unit (55) is electrically connected to the audio unit (54); After confirming that the cover is in an abnormally locked state, the digital processing unit (55) performs the following operations: Stop driving the bolt (12) into the locked position; The control audio unit (54) issues a voice or sound prompt indicating that the cover (2) is in an abnormally locked state; and / or The control audio unit (54) provides instructions via voice on how to open the cover using manual intervention.

[0087] Specifically, if the cover plate is confirmed to be locked when the latch is already out of the lock groove, it is determined that the cover plate (2) is abnormally opened. Furthermore, in order to implement subsequent manual unlocking, a prompt is issued by voice or sound indicating that the cover (2) has failed to enter the open state.

[0088] Specifically, see Figure 5 As shown, the control module (5) includes an audio unit (54) that provides instructions on how to open the cover by manual intervention in a voice manner, including providing the phone number to be dialed or providing instructions on how to push, pull, squeeze or pry a specific component manually.

[0089] The apparatus provided in this embodiment is characterized in that, The digital processing unit (55) and the communication unit (56) are electrically connected; After confirming that the cover is in an abnormally locked state, the digital processing unit (55) performs the following operations: Stop driving the bolt (12) into the locked position; The control communication unit (56) establishes a communication connection with the smartphone; The communication unit (56) establishes a communication connection with the smartphone, sends the cover plate abnormal locking information to the smartphone, and outlines the steps to remove the cover plate abnormal locking.

[0090] The method provided in this embodiment of the invention is specifically executed by the control module (5), see [link to relevant documentation]. Figure 5 As shown, the control module (5) includes a motor drive unit (51), a latch position detection unit (52), a cover plate position detection unit (53), an audio unit (54), a digital processing unit (55), and a communication unit (56); the motor drive unit (51) includes a DC switch circuit for controlling the start and stop of the motor, and controls the DC motor that drives the cam (18) to rotate; the latch position detection unit (52) includes a latch position sensor, see Figure 2As shown, the latch position sensor includes a latch magnet (15) and a latch sensing element (16), wherein the latch sensing element (16) is a Hall element; specifically, the latch sensing element (16) is a Hall switch; the cover plate position detection unit (53) includes a cover plate position sensor, see Figure 2 As shown, the cover plate position sensor includes a cover plate magnet (23) and a cover plate sensing element (17), wherein the cover plate sensing element (17) is a Hall element; the digital processing unit (55) includes a digital processor circuit, the digital processing unit (55) uses the position information provided by the latch position detection unit (52) to determine the position of the latch (12), the digital processing unit (55) uses the position information provided by the cover plate position detection unit (53) to determine the position of the cover plate (2), and the digital processing unit (55) controls the rotation of the motor through the motor drive unit (51), thereby controlling the position of the latch (12).

[0091] The control module (5) uses its included communication unit (56) to receive unlocking commands. The communication unit (56) includes a wireless communication module, such as Bluetooth or WIFI, to transmit the unlocking control commands.

[0092] Locking mechanism (50), see Figure 2 and Figure 5 As shown, it includes a latch (12), a cam (18), a latch spring (13) and a bracket. The bracket includes a slide groove and provides mounting support for the latch (12), the cam (18) and the latch spring (13). The latch (12) is a component with a through hole. The cam (18) is located in the through hole. The latch spring (13) is provided on the left side of the latch. The cam (18) is mounted on the cam shaft (14), which is driven by a DC motor and controlled by a motor drive module (52).

[0093] In the method described in this embodiment, see [link to relevant documentation]. Figure 5 As shown, the control module (5), the locking mechanism (50) and the cover plate (2) are all installed on the manhole cover (6), with the manhole cover (6) serving as its installation support; or, in other words, the control module (5), the locking mechanism (50) and the cover plate (2) are components of the manhole cover (6).

[0094] The method and apparatus provided in this invention overcome at least one of the drawbacks of existing manhole cover technology, such as complex opening and closing structures for the water outlet, complex unlocking and locking structures for the cover plate, and inability to identify and assist in eliminating cover plate jamming faults during unlocking. The method and apparatus are simple in structure, easy to operate, capable of identifying and assisting in eliminating cover plate jamming faults during unlocking, and easy to install and maintain.

Claims

1. A method for opening and closing a water pipe port, comprising: Step on the open cover to make it rotate downward around the cover's pivot axis into the closed position and lock it in place. The sliding handle between the cover and the inner cover allows the inner cover, which has a water outlet on the underside of the cover, to rotate around the inner cover's pivot axis as the cover rotates, entering the retracted position with the water outlet in place. Unlock the cover plate in the closed position so that it rotates upward around the cover plate pivot axis to enter the open position. When the cover plate rotates upward around the cover plate pivot axis, the sliding handle between the cover plate and the inner cover drives the inner cover, which is located on the lower side of the cover plate and has a water outlet port, to rotate around the inner cover pivot axis as the cover plate rotates and enter the water outlet port release position.

2. The water pipe port retraction and extension method as described in claim 1, wherein, The sliding handle connection between the cover plate and the inner cover allows the inner cover, which has a water outlet located on the underside of the cover plate, to rotate around the inner cover's pivot point as the cover plate rotates, moving into the retracted position with the water outlet retracted. Specifically, this includes: Under the influence of gravity at the water outlet port, the inner cover rotates downward around the inner cover axis as the cover plate rotates downward. The inner cover handle hook slides downward within the cover plate handle hook. The water outlet port installed on the inner cover moves into the retracted position as the inner cover rotates downward. When the cover plate rotates upward around its pivot axis, the sliding handle between the cover plate and the inner cover drives the inner cover, which has a water outlet port located on the lower side of the cover plate, to rotate around the pivot axis of the inner cover and enter the water outlet port release position. Specifically, this includes: When the cover plate rotates upward around the cover plate axis under the action of the cover plate torsion spring, the inner cover is tilted and rotates upward around the inner cover axis. The inner cover handle hook slides upward inside the cover plate handle hook. The water outlet port installed on the inner cover enters the water outlet port release position as the inner cover rotates. The inner cover handle hook hooks the cover plate handle hook in the water outlet port release position to prevent it from rotating further upward.

3. The water pipe port retraction and extension method as described in claim 1, wherein, The stepping on the open cover causes it to rotate downwards around the cover's pivot axis into the closed position and be locked. Specifically, this includes: The latch is pressed against the lip of the lock groove on the cover plate to retract into the tongue cavity, and then the latch is pushed into the lock groove on the cover plate by the spring. The process of unlocking the cover plate in the closed position and rotating it upwards around the cover plate's pivot axis to enter the open position includes: Unlocking steps: Rotate the cam so that the cam's centroid changes from pointing in the direction of the bolt extension to pointing in the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. Locking procedure: Rotate the cam so that the cam's centroid changes from pointing in the direction of the bolt extension to pointing in the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. The cam's telecentric point is the point on the cam's cam surface that is farthest from the cam's axis of rotation.

4. The water pipe port retraction and extension method as described in claim 3, wherein, The rotating cam, which changes its distal point from pointing towards the retraction of the latch to pointing towards the extension of the latch, and utilizes the latch spring to push the latch along the slide groove and extend out of the latch cavity, specifically includes: Before performing the operation of rotating the cam to change the direction of the cam's centroid from pointing towards the retraction of the latch to pointing towards the extension of the latch, and using the latch spring to push the latch along the slide and extend out of the latch cavity, confirm that the cover is in the open position.

5. The water pipe port retraction and extension method as described in claim 4, wherein, The operation of confirming that the cover is in the open state specifically includes: Read the output of the bolt position sensor and use its signal to confirm that the bolt has moved out of the lock slot. Then, read the output of the cover plate position sensor and make the following judgment: If the output signal level of the cover plate position sensor is the level L2 corresponding to the cover plate being in the open position, then it is confirmed that the cover plate is in the open state. If the output signal level of the cover plate position sensor is the same as the level L1 corresponding to the cover plate being in the locked position, then it is confirmed that the cover plate is in the locked state.

6. A water pipe end retraction device, comprising: The retraction drive mechanism is used to drive the outlet port (44) included in the outlet port rotation mechanism to change position. It includes a cover plate (2) installed on the manhole cover (6), a cover plate shaft (22) connecting the cover plate (2) and the manhole cover (6), and a torsion spring (3) installed on the cover plate shaft (22). A water outlet rotating mechanism is used to adjust the position and tilt angle of the water outlet (44) and provide mounting support for the water outlet (44), comprising an inner cover (4) and the water outlet (44); characterized in that: The inner cover (4) is installed on the lower side of the cover plate (2). The end of the inner cover (4) away from the cover plate pivot (22) is rotatably connected to the inner cover support body through the inner cover pivot (43). The inner cover (4) is equipped with a water outlet port (44) that rotates with the inner cover. The inner cover (4) includes an inner cover handle hook (42) with a curved finger that slides within the curved finger of the cover plate handle hook (24) included in the cover plate (2), forming a sliding handle connection mechanism between the inner cover (4) and the cover plate (2). The retraction / extension drive mechanism and the outlet port rotation mechanism utilize the aforementioned sliding handle connection mechanism to perform the following actions: Step on the open cover to make it rotate downward around the cover's pivot axis into the closed position and lock it in place. The sliding handle connecting mechanism between the cover and the inner cover allows the inner cover, which is located on the underside of the cover and has a water outlet port, to rotate around the inner cover's pivot axis as the cover rotates and enter the water outlet port retracted position. Unlock the cover plate in the closed position so that it rotates upward around the cover plate pivot axis to enter the open position. When the cover plate rotates upward around the cover plate pivot axis, the sliding handle connecting mechanism between the cover plate and the inner cover drives the inner cover, which is located on the lower side of the cover plate and is equipped with a water outlet port, to rotate around the inner cover pivot axis as the cover plate rotates and enter the water outlet port release position.

7. The water pipe end retraction device according to claim 6, characterized in that, The sliding handle connection mechanism, in the process of allowing the inner cover (4) with the water outlet port located on the lower side of the cover plate to rotate around the inner cover pivot (43) and enter the water outlet port retracted position through the sliding handle connection between the cover plate (2) and the inner cover (4), has the following connection method: Under the gravity of the water outlet port, the inner cover (4) rotates downward around the inner cover pivot (43) as the cover plate (2) rotates downward. The inner cover handle hook (42) slides downward inside the cover plate handle hook (24). The water outlet port (44) installed on the inner cover enters the retracted position of the water outlet port (44) as the inner cover rotates downward. The sliding handle connection mechanism, when the cover plate rotates upward around the cover plate's pivot axis, drives the inner cover, which is located on the lower side of the cover plate and has a water outlet port, to rotate around the inner cover's pivot axis and enter the water outlet port release position. The connection method is as follows: When the cover plate (2) rotates upward around the cover plate pivot (22) under the action of the cover plate torsion spring (3), the inner cover is tilted and rotates upward around the inner cover pivot. The inner cover handle hook (42) slides upward inside the cover plate handle hook (24). The water outlet port (44) installed on the inner cover (4) enters the water outlet port (44) release position as the inner cover rotates. The inner cover handle hook (42) hooks the cover plate handle hook (24) at the water outlet port release position to prevent it from rotating further upward.

8. The water pipe port retraction device according to claim 6 further comprises a locking mechanism (50) and a control module (5); characterized in that, The locking mechanism (50) includes a latch (12), a cam (18), a latch spring (13) and a DC motor for driving the cam (18) for unlocking and locking operations of the cover plate (2); During the process of pressing down on the open cover plate to rotate it downwards around the cover plate's pivot axis into the closed position and lock it in place, the specific operations performed by the locking mechanism (50) include: The latch is pressed against the lip of the lock groove on the cover plate to retract into the tongue cavity, and then the latch is pushed into the lock groove on the cover plate by the spring. The control module (5) includes a motor drive unit (51), a latch position detection unit (52), a cover plate position detection unit (53), a digital processing unit (55), and a communication unit (56). The control module (5) performs the following specific controls on the locking mechanism (50): Unlocking operation: Rotate the cam (18) so that the cam's centroid changes from pointing towards the direction of the bolt extension to pointing towards the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. Locking operation: Rotate the cam (18) so that the cam's centroid changes from pointing to the direction of the bolt extension to pointing to the direction of the bolt retraction. Use the cam's convex surface to push the bolt along the slide and move it out of the lock groove on the cover plate. The cam's telecentric point is the point on the cam's cam surface that is farthest from the cam's axis of rotation.

9. The water pipe end retraction device according to claim 8, characterized in that, The motor drive unit (51) included in the control module (5) is electrically connected to the DC motor included in the lock mechanism (50), and the DC motor drives the cam (18) to rotate through the cam shaft (14); Before the control module (5) performs the operation of rotating the cam so that the cam's centroid changes from pointing towards the retraction of the latch to pointing towards the extension of the latch, and using the latch spring to push the latch along the slide and extend out of the tongue cavity, it uses its included cover plate position detection unit (53) and digital processing unit (55) to perform the operation of confirming that the cover plate is in the open state.

10. The water pipe end retraction device according to claim 9, characterized in that, The control module (5) includes a latch position detection unit (52) which is electrically connected to a latch sensing element (16) installed in the lock mechanism (50). The control module (5) includes a cover plate position detection unit (53) which is electrically connected to a cover plate sensing element (17) installed on the side of the cover plate (2) that does not move with the cover plate (2). The control module (5) includes a digital processing unit (55) that is electrically connected to the latch position detection unit (52) and the cover plate position detection unit (53); The operation performed by the control module (5) to confirm that the cover is in the open state specifically includes: The digital processing unit (55) reads the output of the bolt position sensor through the bolt position detection unit (52), and uses the read bolt position sensor output signal to confirm that the bolt has moved out of the lock slot; then, the digital processing unit (55) reads the output signal of the cover plate position sensor through the cover plate position detection unit (53), and makes the following judgment: If the output signal level of the cover plate position detection unit (53) is the level L2 corresponding to the cover plate being in the open position, then it is confirmed that the cover plate is in the open state; If the output signal level of the cover plate position detection unit (53) is the level L1 corresponding to the cover plate being in the locked position, then it is confirmed that the cover plate is in the locked state.

Images