Door slot and dislocation detection auxiliary device of miter gate

Abstract

The invention discloses a door slot and dislocation detection auxiliary device of a miter gate. The door slot and dislocation detection auxiliary device comprises a left frame body, a right frame body, a left movable frame body, a right movable frame body, a left supporting frame, a right supporting frame and a fixed frame body. A driving mechanism is installed in the middle, image acquisition equipment is installed at the upper end, the driving mechanism comprises a driving motor, a gear and two racks, connecting pieces are arranged at the free ends of the racks, and the image acquisition equipment is located over the center line of the two checkerboard display layers. According to the invention, after hardware installation is completed, an operator firstly goes back and then carries out power-on debugging, so that the safety performance is high. And the offset distances of the checkerboard display layers on the two sides relative to the central axis of the image acquisition equipment are the same, so that the vertical distance between the image acquisition equipment and the checkerboard display layers can be reduced as much as possible on the premise of satisfying complete imaging. Detection of the absolute value of the door slot is converted into detection of the relative position of the checkerboard, lagging detection is avoided, and the detection precision can be improved.

Description

Technical Field

[0001] The invention belongs to the field of water conservancy gates, and in particular relates to a door gap and misalignment detection device for a miter gate. Background Art

[0002] The miter gate is a gate whose left and right doors rotate around the vertical door axis in the side wall of the waterway. When the waterway is closed, it forms a "human" shape from a bird's-eye view. When the miter gate is working, it is driven to rotate by the hydraulic opening and closing parts, and the two door leaves form a three-hinged arch to withstand the water pressure; when the waterway is open, the two door leaves are located in the door niche of the side wall, not bearing the water pressure, and are in a non-working state.

[0003] There are two main indicators that reflect the closing and centering water-blocking effect of the miter gate: one is the size of the gap between the pressure strips of the two door leaves when the two door leaves are closed and stop at the final stop position. The larger the gap, the greater the possibility of misalignment when the miter gate is fully closed; the other is the relative misalignment value of the pressure strips of the two door leaves when the two door leaves are fully closed under positive water pressure. The smaller the misalignment value, the safer the operation of the miter gate, and vice versa. The closing and centering state of the miter gate after the final stop is a key equipment state related to the safe operation of the ship lock. Whether the miter gate has a good water-blocking effect determines whether the ship lock is safe. Once the gate body is seriously misaligned or blocked by foreign objects, after the adjacent gate head starts to deliver water, the gate body of this gate head is under the pressure of the head difference, which may cause the emergency closure of the adjacent gate head, interruption of operation, and water gushing from the valve well. In severe cases, it may cause the gate body structure to deform. High-head ship locks may even have extremely serious hidden dangers of gate body collapse.

[0004] In the prior art, the door gap and misalignment are mainly detected and determined by two methods: proximity switch detection and PSD laser ranging.

[0005] The effective sensing distance of the proximity switch is 0.5-30mm. Under the harsh environmental conditions of high temperature, low temperature, storm, etc. of the miter gate, the sensor failure rate is high. In addition, after the miter gate is closed in a horizontal state, as the lock chamber is filled and discharged, the miter gate will slightly move toward the closing direction. In order to improve the accuracy of the collected signal, the existing control system is equipped with a delay protection, and the miter gate closing signal is collected 70s after the miter gate is closed. It can be seen that the use of a closing switch to detect the gap and misalignment of the miter gate is a post-detection. When emergency measures are taken after the loss of the closing signal is detected, certain accident consequences have already occurred. For the operation of the ship lock, this detection method has obvious technical disadvantages and certain operational risks.

[0006] In the PSD laser ranging method, light intensity, rain and fog refraction, etc. have a great impact on signal reception. In strong light, rain and fog and other weather conditions, shading, light filtering, waterproofing, anti-fog and other noise reduction measures must be taken. However, the noise reduction and denoising effects are not ideal, and large detection errors are likely to occur.

[0007] Therefore, a detection device is needed that can detect the door gap and misalignment of the miter gate with high precision and in real time. Summary of the invention

[0008] The purpose of the present invention is to provide a door gap and misalignment detection auxiliary device for a miter gate to solve the technical problems in the prior art of hysteresis in detection using proximity switches and large detection errors when using PSD lasers.

[0009] To achieve the above object, the present invention provides the following technical solutions: A door gap and misalignment detection device for a miter gate, comprising a left frame for fixing on a left gate and a right frame for fixing on a right gate, a left movable frame being installed on the left frame in a guided and movable manner, a right movable frame being installed on the right frame in a guided and movable manner, a left supporting frame being fixed on the left movable frame, a right supporting frame being fixed on the right movable frame, and a checkerboard display layer being attached to the upper end surfaces of the left supporting frame and the right supporting frame; A fixed frame is also fixed on the left frame or the right frame, a driving mechanism is installed in the middle of the fixed frame, and an image acquisition device is installed on the upper end, the driving mechanism includes a driving motor, a gear and two sets of racks, the driving motor is used to drive the gear to rotate, the two sets of racks are respectively arranged on the upper and lower sides of the gear and the free ends extend toward different sides, the free ends of the racks are provided with connecting pieces, and the connecting pieces at the free ends of the two sets of racks are used to drive the left movable frame and the right movable frame to approach or move away synchronously; The image acquisition device is located directly above the center lines of the two groups of checkerboard display layers.

[0010] Furthermore, a fill light is installed on the upper end of the fixed frame, and the fill light is an infrared fill light.

[0011] Furthermore, the connecting piece is detachably connected to the free end of the rack, and the connecting piece includes an inner working position and an outer working position; in the inner working position, the connecting piece corresponds to the bolt through-hole positions on the left movable frame and the right movable frame for fixing the connecting piece; in the outer working state, the connecting piece corresponds to the position of the checkerboard display layer, and the lower end of the connecting piece is provided with a cleaning layer connecting structure for connecting the cleaning layer.

[0012] Furthermore, the connecting piece is of a U-shaped structure, comprising an upper side plate, a lower side plate and a bottom plate, a plurality of bolt holes are arranged at intervals along the inside-outside direction on the lower side plate, and an adapting bolt through-hole is also arranged on the rack, and when the connecting piece is connected to the adapting bolt through-hole on the rack through the inner bolt hole by bolts, the connecting piece is in an outer working position; when the connecting piece is connected to the adapting bolt through-hole on the rack through the outer bolt hole by bolts, the connecting piece is in an inner working position.

[0013] Furthermore, both ends of the lower side plate extend out of the bottom plate so that the corresponding cleaning layers can be sleeved thereon.

[0014] Furthermore, the bottom plate includes an upper bottom plate and a lower bottom plate, the upper side plate is fixed to the upper bottom plate, the lower side plate is fixed to the lower bottom plate, the upper bottom plate is inserted into the lower bottom plate, and a compression spring is connected between the upper bottom plate and the lower bottom plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: After the hardware installation is completed, the operator leaves the site first and then conducts power-on debugging, which has high safety performance. The checkerboard display layers on both sides have the same offset distance relative to the central axis of the image acquisition device, and the vertical distance between the image acquisition device and the checkerboard display layer can be reduced as much as possible under the premise of meeting the complete imaging.

[0016] The gear rack mechanism can be used to adjust the synchronous movement of the checkerboard display layers on both sides to debug the equipment, and can also be used to remove dust from the surface of the checkerboard display layer during daily operation and maintenance to avoid dust accumulation on the checkerboard display layer and affecting the accuracy of determining the intersection of black squares and white squares.

[0017] The fill light can illuminate the checkerboard display layer when the light is insufficient, avoiding image acquisition failure caused by insufficient light. The fill light 0 installed at the top can also avoid reflection as much as possible, ensuring that clear image information can be collected even in the dark.

[0018] The lower side plate of the connecting piece can float within a certain range between the bottom plate in the height direction, thereby reducing the requirement on the installation accuracy of the rack and the left support frame or the right support frame in the height direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 A schematic diagram of a structure of an embodiment of a door gap and misalignment detection auxiliary device of a miter gate of the present invention installed on a gate; Figure 2A front view of a door gap and misalignment detection auxiliary device for a miter gate; Figure 3 It is a side view of a door gap and misalignment detection auxiliary device of a miter gate; Figure 4 It is a structural schematic diagram of the connecting piece; In the figure: 1. left frame; 2. right frame; 3. left movable frame; 4. right movable frame; 5. fixed frame; 6. driving mechanism; 7. left supporting frame; 8. right supporting frame; 9. image acquisition device; 10. checkerboard display layer; 11. fill light; 61. driving housing; 62. gear; 63. rack; 64. connecting piece; 641. upper side plate; 642. lower side plate; 643. upper bottom plate; 644. lower bottom plate; 645. compression spring. DETAILED DESCRIPTION

[0020] 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.

[0021] An embodiment of a door gap and misalignment detection auxiliary device for a miter gate of the present invention: A door gap and misalignment detection auxiliary device for a miter gate, the structure of which is as follows Figures 1 to 4 As shown, it includes a left frame 1 and a right frame 2, a left movable frame 3 that can be guided and moved is installed on the left frame 1, and a right movable frame 4 that can be guided and moved is installed on the right frame 2. A fixed frame 5 is fixed on the left frame 1, and a driving mechanism 6 is installed on the fixed frame 5. A left support frame 7 is fixed on the left movable frame 3, and a right support frame 8 is fixed on the right movable frame 4. A checkerboard display layer 10 is attached to the upper end surface of the left support frame 7 and the right support frame 8. The checkerboard display layer 10 has the characteristics of waterproof and sun protection. In essence, it contains a plurality of small squares, and the colors of two adjacent small squares are different, so as to facilitate the identification of the intersection of two adjacent small squares. When the gate is completely closed, the relative distance between the corresponding intersections of the left and right checkerboard display layers 10 is calibrated; during the detection process, the door gap and misalignment of the gate can be calculated by the real-time detection of the relative distance between the corresponding intersections of the left and right checkerboard display layers 10. This part of the method belongs to the prior art and will not be described in detail in this application.

[0022] In this embodiment, the checkerboard display layer 10 is preferably a blackboard checkerboard with alternating black and white squares to increase the color difference between two adjacent small squares and facilitate the computer to identify the coordinates of the intersections of squares of different colors.

[0023] Matching guide rails and guide grooves are arranged between the left movable frame 3 and the left frame 1, and between the right movable frame 4 and the right frame 2, and the guide rails and guide grooves extend in the left and right directions, so that the left movable frame 3 and the right movable frame 4 can be guided and moved in the left and right directions.

[0024] The driving mechanism 6 is a gear rack mechanism, wherein the gear 62 is enclosed in the driving housing 61, and the free end of the rack 63 extends out of the driving housing 61. Two groups of racks 63 are provided, wherein the upper rack 63 meshes with the upper end of the gear 62, and the lower rack 63 meshes with the lower end of the gear 62, the free end of the upper rack 63 extends to the right, and the free end of the lower rack 63 extends to the left, and the ends of the two racks 63 are provided with connecting pieces 64, which are fixed to the left support frame 7 and the right support frame 8 by bolts.

[0025] The driving mechanism 6 also includes a driving motor, which is used to drive the gear 62 to rotate, and the racks 63 on both sides will move closer or farther away synchronously, thereby driving the corresponding movable frame to move along the corresponding base guide. It should be emphasized that the upper end of the connecting piece 64 can be detachably fixed to the end of the rack 63, and the detachable connection method can be a bolt connection, a pin connection or other connection methods. Therefore, after the present invention is installed on the gate, the distance between the two checkerboard display layers can be adjusted by remotely controlling the forward / reverse rotation of the driving motor.

[0026] The connecting piece 64 is a U-shaped structure, one side plate of which is fixed to the end of the rack 63 by bolts, and the other side plate is fixed to the end of the left support frame 7 / right support frame 8 by bolts. Among them, a plurality of bolt holes are arranged at intervals on the upper side plate of the connecting piece 64 in the direction perpendicular to the paper plane, and two bolt holes are arranged at the end of the rack 63 in the direction perpendicular to the paper plane. When the two innermost bolt holes (i.e., inward perpendicular to the paper plane) of the connecting piece 64 correspond to the bolt holes on the rack 63 and the bolts are inserted, the connecting piece 64 is in the outer working position; when the two outermost bolt holes (i.e., outward perpendicular to the paper plane) of the connecting piece 64 correspond to the bolt holes on the rack 63 and the bolts are inserted, the connecting piece 64 is in the inner working position.

[0027] It can be understood that in other embodiments, the position of the connecting piece 64 relative to the rack 63 can be adjusted by other adjustment structures. For example, the connecting piece 64 and the base body on which the rack 63 is installed are guided and moved in and out in cooperation, and assisted by positioning holes and positioning pins that pass through the connecting piece 64 and the base body, so as to achieve the purpose of switching the connecting piece 64 between the inner working position and the outer working position.

[0028] The lower side plate and the bottom plate of the connecting piece 64 can float within a certain range in the height direction. Specifically, the bottom plate is processed into a two-section sleeve form, the upper side plate 641 is fixed to the upper bottom plate 643, the lower side plate 642 is fixed to the lower bottom plate 644, the upper bottom plate 643 is inserted into the lower bottom plate 644, and a compression spring 645 is connected between the upper bottom plate 643 and the lower bottom plate 644. In this case, the height of the connecting piece 64 is adjustable within a certain range, which is convenient for fixing the connecting piece 64 on the left support frame 7 or the right support frame 8; when the rack 63 moves horizontally, the connecting piece 64 can also drive the left support frame 7 and the right support frame 8 to move to adjust the distance between the two sets of chessboard display layers 10. Both ends of the lower side plate 642 extend out of the lower bottom plate 644, so the cleaning layer is made into a sleeve shape and can be directly sleeved on the lower side plate 642. Of course, in other embodiments, a binding rope, Velcro or other cleaning layer connecting structures that can fix the cleaning layer under the lower side plate 642 can also be set on the lower side plate 642.

[0029] Since the width of the base on which the rack 63 is installed is limited, in order to expand the distance between the inner working position and the outer working position of the connecting piece 64, the width of the upper side plate 641 can be made greater than the width of the lower side plate 642. By expanding the width of the upper side plate 641, the switching of the connecting piece 64 between the two working positions is guaranteed.

[0030] An image acquisition device 9 is installed at the upper end of the fixed frame 5. The image acquisition device 9 is located directly above the joint position of the two gate closing positions in the width direction. The acquisition direction of the image acquisition device 9 is downward to acquire images of the two checkerboard display layers 10 below it, so as to realize auxiliary detection of the gate gap and misalignment.

[0031] The present invention is installed on the top of the gate, specifically, the left frame 1 is installed on the left gate, the right frame 2 is installed on the right gate, the connecting piece 64 is adjusted to the inner working position, the lower side plate of the connecting piece 64 at the end of the left rack 63 is bolted to the left support frame 7, and the lower side plate of the connecting piece 64 at the end of the right rack 63 is bolted to the right support frame 8. Then the drive motor is started, and the drive motor rotates counterclockwise, driving the two checkerboard display layers 10 to approach synchronously until the image acquisition device 9 feeds back the complete image information of the two checkerboard display layers 10.

[0032] The distance between the two checkerboard display layers 10 is adjusted so that the image acquisition device 9 can completely acquire the image information of the two checkerboard display layers 10 .

[0033] A fill light 11 is also installed on the fixed frame 5, wherein the fill light 11 is an infrared fill light and is installed at the upper end of the fixed frame 5. The light of the fill light 11 irradiates downward to illuminate the checkerboard display layer 10 and avoid image acquisition failure caused by insufficient light. The fill light 10 installed at the upper end can also avoid reflection as much as possible, ensuring that clear image information can be collected even at night.

[0034] After the hardware installation is completed, the operator exits the scene first, and then powers on the image acquisition device 9 for debugging, thereby avoiding the operator debugging the device in a powered-on environment, and having high safety performance. In addition, the checkerboard display layers 10 on both sides are synchronously close, and the checkerboard display layers 10 on both sides are offset from the central axis of the image acquisition device 9 by the same distance, and the vertical distance between the image acquisition device 9 and the checkerboard display layer 10 can be reduced as much as possible while satisfying the premise of complete imaging.

[0035] After the debugging is completed, the device is powered off, and the operator adjusts the connecting piece 64 to the outward working state, and puts a cleaning layer on the lower side plate of the connecting piece 64. When the driving motor is started, it can drive the cleaning layer (such as cleaning felt, sponge or scouring pad) to sweep over the checkerboard display layer 10 to complete the cleaning of the surface of the checkerboard display layer 10, so as to avoid the problem of dust gathering on the checkerboard display layer 10 and affecting the accuracy of determining the intersection of black squares and white squares.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A door gap and misalignment detection device for a miter gate, characterized in that: It comprises a left frame body for fixing on the left gate and a right frame body for fixing on the right gate, a left movable frame body is installed on the left frame body in a guided and movable manner, a right movable frame body is installed on the right frame body in a guided and movable manner, a left supporting frame is fixed on the left movable frame body, a right supporting frame is fixed on the right movable frame body, and a checkerboard display layer is attached to the upper end surfaces of the left supporting frame and the right supporting frame; A fixed frame is also fixed on the left frame or the right frame, a driving mechanism is installed in the middle of the fixed frame, and an image acquisition device is installed on the upper end, the driving mechanism includes a driving motor, a gear and two sets of racks, the driving motor is used to drive the gear to rotate, the two sets of racks are respectively arranged on the upper and lower sides of the gear and the free ends extend toward different sides, the free ends of the racks are provided with connecting pieces, and the connecting pieces at the free ends of the two sets of racks are used to drive the left movable frame and the right movable frame to approach or move away synchronously; The image acquisition device is located directly above the center lines of the two groups of checkerboard display layers.

2. The door gap and misalignment detection device of a miter gate according to claim 1, characterized in that: A fill light is installed on the upper end of the fixed frame, and the fill light is an infrared fill light.

3. The door gap and misalignment detection device of a miter gate according to claim 1, characterized in that: The connecting piece is detachably connected to the free end of the rack, and the connecting piece includes an inner working position and an outer working position; In the inner working position, the connecting piece corresponds to the bolt through-hole positions on the left movable frame and the right movable frame for fixing the connecting piece; In the outward working state, the connection piece corresponds to the position of the checkerboard display layer, and the lower end of the connection piece is provided with a cleaning layer connection structure for connecting the cleaning layer.

4. The device for detecting the gap and misalignment of a miter gate according to claim 3, characterized in that: The connecting piece is in a U-shaped structure, including an upper side plate, a lower side plate and a bottom plate. A plurality of bolt holes are arranged at intervals along the inner and outer directions on the lower side plate, and an adapting bolt through-hole is also arranged on the rack. When the connecting piece is connected to the adapting bolt through-hole on the rack through the inner bolt hole by bolts, the connecting piece is in an outer working position; when the connecting piece is connected to the adapting bolt through-hole on the rack through the outer bolt hole by bolts, the connecting piece is in an inner working position.

5. The device for detecting the gap and misalignment of a miter gate according to claim 3, characterized in that: Both ends of the lower side plate extend out of the bottom plate so that the corresponding cleaning layers can be sleeved thereon.

6. The device for detecting the gap and misalignment of a miter gate according to claim 3, characterized in that: The bottom plate comprises an upper bottom plate and a lower bottom plate, the upper side plate is fixed to the upper bottom plate, the lower side plate is fixed to the lower bottom plate, the upper bottom plate is inserted into the lower bottom plate, and a compression spring is connected between the upper bottom plate and the lower bottom plate.

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