Flap door opening measuring device

Abstract

The present invention provides a flap door opening measuring device, which relates to the technical field of pump station engineering. The device connects one end of the internal force transmission line in the underwater flap door connecting pipe to the flap door, and the other end is movably connected to the lower end of the connecting rod passing through the rubber sealing piston after passing through the transmission wheel and the steering wheel. One end of the external force transmission line outside the flap door connecting pipe is movably connected to the upper end of the connecting rod, and the other end is connected to the lower end surface of the pointer plate after passing through the transmission wheel, and the upper end surface of the pointer plate is connected to the reset structure through the reset line. The flap door opening measuring device of the present invention can intuitively display the opening angle of the underwater flap door through the display mechanism on the water through the mutual cooperation of the transmission wheel and the internal and external force transmission lines, and it has a simple structure, reliable operation, durability, simple and easy inspection and maintenance work, intuitive and convenient data observation, and can be promoted and applied in various fields such as water conservancy systems, urban flood control and drainage.

Description

Technical Field

[0001] The invention relates to the technical field of pump station engineering, and in particular to a flap door opening measurement device. Background Art

[0002] The flap gate is a one-way valve, which is often used to cut off the flow at the end of the water pump outlet. When the unit is turned on, the flap gate automatically opens under the impact of the water flow; when the unit is shut down, the flap gate automatically closes under its own weight or the effect of backflow water. In the actual application of pump station engineering, the size of the flap gate opening is closely related to the safe operation and energy saving of the pump station. A small flap gate opening will affect the outflow, increase the local hydraulic loss, and reduce the efficiency of the pump station device; and when the flap gate cannot be closed in time or even cannot be closed completely due to damage to some components (that is, the flap gate opening is large), the purpose of cutting off the water flow and protecting the unit will not be achieved. However, since the flap gate is submerged in water, when the unit is running, the pump station operation and management personnel have no idea about its opening and working status, which brings great safety hazards to the safe operation of the pump station. Therefore, it is urgent to propose a method that can view the flap gate opening in real time to help the safe, energy-saving and efficient operation of the pump station.

[0003] At present, the monitoring of flap door opening is mainly carried out by installing an inclinometer on the non-working surface of the flap door, and then using a demodulator to monitor the flap door opening and working status in real time. However, this method requires that the inclinometer and other precision instruments be submerged underwater together with the flap door. Therefore, on the one hand, it puts forward high requirements on the corrosion resistance and waterproof level of the inclinometer and other precision instruments. On the other hand, when the inclinometer and other precision instruments are damaged and cannot work normally, the inspection and maintenance of the measuring device is cumbersome and difficult.

[0004] It can be seen that the existing flap door opening measurement technology not only places extremely high demands on the production and installation of the measuring device, but also has problems such as cumbersome and difficult subsequent inspection and maintenance of the measuring device. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention proposes a flap door opening measuring device, which solves the problems in the prior art that the flap door opening measuring device has high production and installation requirements and the inspection and maintenance work is cumbersome and difficult.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A flap door opening measuring device is used to measure the opening of a flap door in a flap door mechanism, the flap door mechanism comprises a door seat, a flap door, and a flap door connecting pipe, the door seat is connected to the flap door connecting pipe, the flap door is connected to the door seat through a hinge, the device comprises: a force transmission mechanism, a line outlet cavity mechanism, and a display mechanism;

[0010] The force transmission mechanism includes an inner force transmission line, an outer force transmission line, a plurality of transmission wheels and at least one steering wheel;

[0011] The outlet cavity mechanism comprises an outlet cavity, a rubber sealing piston, a connecting rod, and an outlet cavity sealing cover plate with an outlet hole reserved therein;

[0012] The display mechanism includes a dial, a pull rod, a pointer plate, a reset line, and a reset mechanism;

[0013] The outlet chamber mechanism is fixed at the through hole opened on the flap door connecting tube, the rubber sealing piston is arranged in the outlet chamber and is slidably connected to the inner wall of the outlet chamber, and the outlet chamber sealing cover plate is detachably connected to the upper end of the outlet chamber; at least one of the steering wheels is fixed to the inner wall of the flap door connecting tube through a steering wheel bracket, and several of the transmission wheels are fixed to the inner wall of the flap door connecting tube and the wall outside the flap door connecting tube through the transmission wheel bracket along the direction of the force transmission line; one end of the internal force transmission line is fixed to the flap door, and the other end is movably connected to the lower end of the connecting rod after passing through the transmission wheel and the steering wheel in sequence, and the connecting rod passes through the rubber sealing piston; one end of the external force transmission line is movably connected to the upper end of the connecting rod, and the other end passes through the outlet hole of the outlet chamber sealing cover plate and is connected to the lower end of the pull rod, the upper end of the pull rod is connected to the lower end surface of the pointer plate, and the upper end surface of the pointer plate is connected to the reset mechanism through the reset line.

[0014] Preferably, the through hole on the flap door connecting tube and the wire outlet hole reserved on the wire outlet cavity sealing cover plate are located on the same central axis.

[0015] Preferably, the device further comprises a force transmission line positioning cavity, and the force transmission line positioning cavity is fixed in a groove opened on the wheel body of the steering wheel and the transmission wheel along the direction of the force transmission line.

[0016] Preferably, the steering wheel bracket and the transmission wheel bracket are both adjustable brackets, and the steering wheel is non-rotatably connected to the steering wheel bracket and the transmission wheel is non-rotatably connected to the transmission wheel bracket.

[0017] Preferably, the connecting rod is provided with threads, which cooperate with nuts provided on the upper and lower sides of the rubber sealing piston to lock and position the rubber sealing piston.

[0018] Preferably, a pair of guide rails are provided on the scale plate, and a pair of rail wheels are provided at positions on the pointer plate corresponding to the guide rails.

[0019] Preferably, length scale lines and angle scale lines are respectively marked on both sides of the scale disk.

[0020] Preferably, a pointer plate resetting positioner is provided on the pointer plate.

[0021] Preferably, the reset mechanism is a coil spring.

[0022] Preferably, the inner force transmission line and the outer force transmission line are both formed by spirally winding stainless steel metal wires.

[0023] (III) Beneficial effects

[0024] The present invention provides a door opening measurement device. Compared with the prior art, it has the following beneficial effects:

[0025] 1. A flap door opening measuring device provided by the present invention connects one end of an internal force transmission line in an underwater flap door connecting tube to the flap door, and the other end is movably connected to the lower end of a connecting rod passing through a rubber sealing piston after being transmitted by a transmission wheel and turned by a steering wheel; one end of an external force transmission line outside the flap door connecting tube is movably connected to the upper end of the connecting rod, and the other end is connected to the lower end surface of a pointer plate after being transmitted by a transmission wheel, and the upper end surface of the pointer plate is connected to a reset structure through a reset line. The flap door opening measuring device of the present invention can intuitively display the opening angle of the underwater flap door through the display mechanism on the water through the cooperation between the transmission wheel and the inner and outer force transmission lines during the measurement work. The entire measuring device has no mechanical connection devices such as levers and hinges, thereby effectively avoiding the phenomenon of jamming, deformation and the like when mechanical moving parts fail. In addition, due to its simple structure, reliable operation and durability, it effectively solves the problems of high production and installation requirements and cumbersome and difficult inspection and maintenance work of the flap door measuring device in the prior art. At the same time, the flap door opening measuring device of the present invention can simply and intuitively observe the flap door opening angle and its working state, and can be promoted and applied in the fields of water conservancy systems, urban flood control and drainage, etc.

[0026] 2. In the present invention, the transmission wheel and the steering wheel are non-rotatable relative to their fixed brackets, and there is sliding friction between them and the power transmission line, which effectively avoids the occurrence of mechanical failures in the system; the rail wheel on the pointer plate is rotatable relative to its bracket, and there is only rolling friction when it moves in the guide rail; and the transmission wheel, the steering wheel and the rail wheel on the pointer plate are all made of high-hardness, ultra-smooth and wear-resistant polyurethane, which effectively reduces the mechanical friction loss of the whole system and improves the operation efficiency of the unit;

[0027] 3. In the present invention, the rubber sealing piston is fixed to the middle part of the stainless steel connecting rod by the connection rod with threads and the nuts at the upper and lower ends of the rubber sealing piston. When the rubber sealing piston is damaged by friction due to long-term operation, only the rubber sealing piston needs to be replaced, and the remaining parts in the whole system can continue to be used, thereby reducing the cost of later inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the structure of a door opening measurement device according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the inner force transmission line in the door flapping mechanism according to an embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the outlet cavity mechanism in an embodiment of the present invention;

[0032] Figure 4 It is a structural schematic diagram of a display mechanism in an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the guide rail and the rail wheel in the display mechanism according to an embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the transmission wheel, the transmission wheel bracket and the force transmission line positioning cavity in an embodiment of the present invention;

[0035] In the figure: 1-flapping door mechanism; 101-door seat; 102-flapping door; 103-flapping door connecting pipe; 104-through hole; 2-force transmission mechanism; 201-inner force transmission line; 202-outer force transmission line; 203-transmission wheel; 204-steering wheel; 205-force transmission line positioning cavity; 206-steering wheel bracket; 207-transmission wheel bracket; 3-outlet cavity mechanism; 301-outlet cavity; 302-rubber sealing piston; 303-connecting rod; 304-outlet cavity sealing cover plate; 4-display mechanism; 401-dial; 402-pull rod; 403-pointer plate; 404-reset line; 405-reset mechanism; 406-guide rail; 407-rail wheel; 408-pointer plate reset locator. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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.

[0037] The embodiment of the present application provides a flap door opening measuring device, which solves the problem in the prior art that the flap door opening measuring device has high production and installation requirements and the inspection and maintenance work is cumbersome and difficult, and achieves the purpose of using a simple device to simply and intuitively observe the flap door opening and its working status.

[0038] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0039] Since the flap door is submerged in water, when the unit is started or shut down, the pump station operation management personnel and pump station design engineers have no idea about its opening angle and operating status, which brings great safety hazards to the safe operation of the pump station and is not conducive to the optimal design of the pump station. In order to simply, conveniently and intuitively display the opening angle of the underwater flap door through an above-water display mechanism, the present invention transmits the flap door opening angle through an internal force transmission line, and after passing through a transmission wheel and a steering wheel, it is connected to the lower end of a connecting rod passing through a rubber sealing piston, and then the pull rod is pulled by an external force transmission line connected to the upper end of the connecting rod to drive the pointer plate for scale display, so that the underwater flap door opening size can be displayed using length scale lines and angle scale lines. The flap door opening measurement device of the present invention effectively solves the problem that the flap door measurement device in the prior art has high production and installation requirements and cumbersome and difficult inspection and maintenance work.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Embodiment 1:

[0042] The present embodiment provides a flap door opening degree measuring device, which is used to measure the opening degree of a flap door 102 in a flap door mechanism 1. The flap door mechanism 1 includes a door seat 101, a flap door 102, and a flap door connecting pipe 103. The door seat 101 is connected to the flap door connecting pipe 103. The flap door 102 is connected to the door seat 101 through a hinge. The flap door opening degree measuring device includes: a force transmission mechanism 2, a line outlet cavity mechanism 3, and a display mechanism 4.

[0043] The force transmission mechanism 2 includes an inner force transmission line 201, an outer force transmission line 202, a plurality of transmission wheels 203 and at least one steering wheel 204;

[0044] The outlet cavity mechanism 3 includes an outlet cavity 301, a rubber sealing piston 302, a connecting rod 303, and an outlet cavity sealing cover plate 304 with an outlet hole reserved therein;

[0045] The display mechanism 4 includes a dial 401, a pull rod 402, a pointer plate 403, a reset line 404, and a reset mechanism 405;

[0046] The outlet chamber mechanism 3 is fixed to the through hole 104 opened on the flap door connecting tube 103, the rubber sealing piston 302 is arranged in the outlet chamber 301 and is slidably connected to the inner wall of the outlet chamber 301, and the outlet chamber sealing cover plate 304 is detachably connected to the upper end of the outlet chamber 301; at least one of the steering wheels 204 is fixed to the inner wall of the flap door connecting tube 103 through the steering wheel bracket 206, and several of the transmission wheels 203 are fixed to the inner wall of the flap door connecting tube 103 and the wall outside the flap door connecting tube 103 through the transmission wheel bracket (207) along the direction of the power transmission line; the inner transmission wheel bracket 206 is fixed to the inner wall of the flap door connecting tube 103 and the wall outside the flap door connecting tube 103 through the transmission wheel bracket (207); One end of the force line 201 is fixed on the flap door, and the other end passes through the transmission wheel 203 and the steering wheel 204 in sequence and is movably connected to the lower end of the connecting rod 303, and the connecting rod 303 passes through the rubber sealing piston 302; one end of the external force line 202 is movably connected to the upper end of the connecting rod 303, and the other end passes through the outlet hole of the outlet cavity sealing cover plate 304 and is connected to the lower end of the pull rod 402, the upper end of the pull rod 402 is connected to the lower end surface of the pointer plate 403, and the upper end surface of the pointer plate 403 is connected to the reset mechanism 405 through the reset line 404.

[0047] It can be seen that the flap gate opening measuring device provided by this embodiment connects one end of the internal force transmission line in the underwater flap gate connecting tube to the flap gate, and the other end is movably connected to the lower end of the connecting rod passing through the rubber sealing piston after being transmitted by the transmission wheel and turned by the steering wheel, one end of the external force transmission line outside the flap gate connecting tube is movably connected to the upper end of the connecting rod, and the other end is connected to the lower end surface of the pointer plate after being transmitted by the transmission wheel, and the upper end surface of the pointer plate is connected to the reset structure through the reset line. The flap door opening measuring device of the present invention can intuitively display the opening angle of the underwater flap door through an above-water display mechanism through the cooperation of the transmission wheel and the internal and external force transmission lines during the measurement work. The entire measuring device is free of mechanical connection devices such as levers and hinges, thereby effectively avoiding the phenomenon of jamming, deformation and the like when mechanical moving parts fail. In addition, due to its simple structure, reliable operation and durability, it effectively solves the problems of high production and installation requirements and complicated and difficult inspection and maintenance of flap door measuring devices in the prior art. At the same time, the flap door opening measuring device of the present invention can simply and intuitively observe the flap door opening angle and its working status, and can be promoted and applied in the fields of water conservancy systems, urban flood control and drainage, etc.

[0048] Below is a description of the drawings Figure 1-Figure 6 It should be noted that, in this embodiment, for the convenience of description, the near-water end of the display mechanism is taken as the bottom and the far-water end is taken as the top.

[0049] See also Figure 1 A flap door opening measuring device is used to measure the opening of a flap door 102 in a flap door mechanism 1. The flap door mechanism 1 is submerged in water, and comprises a door seat 101, a flap door 102, and a flap door connecting pipe 103 with a through hole 104. The door seat 101 is connected to the flap door connecting pipe 103 through a flange, and the flap door 102 is connected to the door seat 101 through a hinge arranged at the upper edge of the door seat 101. When the unit is started, water flows through the flap door connecting pipe 103, and the flap door 102 can be automatically opened under the impact of the water flow; when the unit is stopped and there is no water flow, the flap door 102 is automatically closed by its own weight or the action of backflow water.

[0050] The flap door opening measuring device of this embodiment includes: a force transmission mechanism 2, a line outlet cavity mechanism 3, and a display mechanism 4.

[0051] The outlet cavity mechanism 3 is fixed to the through hole 104 of the flap door connecting tube 103 by welding, and is used to connect the internal force transmission line 201 inside the flap door connecting tube 103 with the external force transmission line 202 outside the flap door connecting tube 103. Generally, the through hole 104 on the flap door connecting tube 103 is opened just above the flap door connecting tube 103. Correspondingly, when the outlet cavity mechanism 3 is welded to the through hole 104 on the flap door connecting tube 103, it can be kept perpendicular to the flap door connecting tube 103. Figure 3 , the outlet cavity mechanism 3 includes an outlet cavity 301, a rubber sealing piston 302 and an outlet cavity sealing cover plate 304 with an outlet hole reserved therein. Among them, the rubber sealing piston 302 is generally an upward concave rubber sealing piston 302, which is arranged in the outlet cavity 301 and fits tightly with the inner wall of the outlet cavity 301 but can be slidably connected, and the outlet cavity sealing cover plate 304 is detachably connected to the upper end of the outlet cavity 301 through a thread. In particular, in order to ensure that the outlet and return lines of the external power transmission line 202 can be smoother, a better processing method is to ensure that the outlet cavity 301 and the outlet hole on the outlet cavity sealing cover plate 304 and the through hole 104 on the flap door connecting tube 103 are located on the same central axis during production setting.

[0052] See also Figure 1 and Figure 2The force transmission mechanism 2 is used to reflect the change of the opening angle of the flap door 102 to the display mechanism 4 through the force transmission line for scale display. Specifically, the force transmission mechanism 2 includes an internal force transmission line 201 arranged inside the flap door connecting tube 103, an external force transmission line 202 arranged outside the flap door mechanism 1, and at least one steering wheel 204 for steering the force transmission line and a plurality of transmission wheels 203 for guiding the force transmission line. When there is only one steering wheel 204, it is fixed to the inner wall of the flap door connecting tube 103 through a steering wheel bracket 206. In order to ensure that the internal force transmission line 201 is smoothly discharged and returned, during installation, the steering wheel 204 is installed at a certain angle at the connection between the outlet cavity mechanism 3 and the flap door connecting tube 103, so that the internal force transmission line 201 and the external force transmission line 202 are as vertical as possible. In addition, if the installation position of the display mechanism 4 needs to be adjusted according to the on-site environment and actual production, several steering wheels 204 can be set on the line of the external force transmission line 202 according to actual needs, so as to flexibly change the installation position of the display mechanism 4. For example, adding a transmission wheel allows the display mechanism 4 to be installed vertically, horizontally, or at a certain angle to the horizontal plane. However, in general, the scale plate 401 of the display mechanism 4 is set perpendicular to the horizontal plane, which is not only convenient for the staff to observe and read data, but also does not need to add additional steering wheels 204, making the entire structure simpler. The transmission wheels 203 can be set to several according to actual needs. During installation, these several transmission wheels 203 are welded and fixed along the direction of the force transmission line through the transmission wheel bracket 207, wherein the transmission wheel 203 guiding the internal force transmission line 201 is welded and fixed on the inner wall of the flap door connecting pipe 103, and the transmission wheel 203 guiding the external force transmission line 202 is generally fixed to the wall outside the flap door connecting pipe 103 by expansion bolts. In particular, in order to prevent the power transmission line from being dislocated, a power transmission line positioning cavity 205 is correspondingly provided on all the steering wheels 204 and the transmission wheel 203. Specifically, along the direction of the power transmission line, two grooves (not shown in the figure) are symmetrically opened on both sides of the power transmission line on the wheel body, and then the two sides of the split section of the power transmission line positioning cavity 205 are fixed in the grooves and reinforced by glue. It should be noted that when the power transmission line positioning cavity 205 of the steering wheel 204 is set, it needs to be bent to a certain arc to adapt to the arc of the steering wheel. One end of the internal power transmission line 201 is fixed on the flap door. Specifically, a U-shaped closed pull ring can be welded on the flap door, and then the internal power transmission line 201 is fixed to the U-shaped closed pull ring with a stainless steel wire rope clamp. The other end of the internal power transmission line 201 passes through the transmission wheel 203 and the steering wheel 204 in turn and is movably connected to the lower end of the connecting rod 303 with a stainless steel wire rope clamp. The connecting rod 303 is a stainless steel connecting rod, which passes through the rubber sealing piston 302 from the middle.In addition, in order to ensure that the rubber sealing piston 302 is fixed on the connecting rod 303, a thread is set on the connecting rod 303, and then the rubber sealing piston 302 is locked and positioned in cooperation with nuts set on the upper and lower sides of the rubber sealing piston 302. One end of the external force transmission line 202 is movably connected to the upper end of the connecting rod 303 through a stainless steel wire rope clamp, and the other end passes through the outlet hole of the outlet cavity sealing cover plate 304 and is connected to the lower end of the pull rod 402 with a stainless steel wire rope clamp, while the upper end of the pull rod 402 is connected to the lower end surface of the pointer plate 403, and the upper end surface of the pointer plate 403 is connected to the reset mechanism 405 through the reset line 404. When connecting, an O-type pull ring can be welded at the upper and lower ends of the pull rod 402 respectively, so as to facilitate the fixed connection of the reset line 404 and the pull rod 402 and the fixed connection of the external force transmission line 202 and the pull rod 402.

[0053] In particular, in order to ensure the strength of the force transmission line and reduce the measurement error caused by the deformation of the force transmission line, the inner force transmission line 201 and the outer force transmission line 202 are both formed by spirally winding stainless steel wires, which can be bent but not stretched.

[0054] join Figure 6 The steering wheel bracket 206 and the transmission wheel bracket 207 are both adjustable brackets to facilitate correction and alignment during later installation; and the steering wheel 204 is non-rotatably connected relative to the steering wheel bracket 206, and the transmission wheel 203 is non-rotatably connected relative to the transmission wheel bracket 207, so that there is sliding friction between the transmission wheel 203 and the power transmission line, which can effectively avoid the occurrence of mechanical failures in the system.

[0055] In addition, all the steering wheels 204 and transmission wheels 203 in this embodiment are made of polyurethane with high hardness, super smoothness and excellent wear resistance, which effectively reduces the mechanical friction loss in the whole system and improves the operation efficiency of the unit.

[0056] The display mechanism 4 is used to visualize the opening angle of the flap door 102, so that the pump station operation and management personnel on the water can directly observe the rotation displacement of the flap door point and its opening angle. Figure 4 As shown, it is a schematic diagram of the structure of the display mechanism in this embodiment. In order to intuitively explain the display mechanism 4, the figure is drawn with L=1000mm. Figure 4The display mechanism 4 includes a dial 401, a pull rod 402, a pointer plate 403, a reset line 404, and a reset mechanism 405. The length scale lines and the angle scale lines corresponding to the length scale lines are marked on both sides of the dial 401, and the length scale lines range from 0mm to 2L×sinα / 2, L is the distance from the flap door measuring point to the rotation axis, in mm; α is the flap door opening angle, and its scale line range is 0 to 90°, in degrees (°). The pointer plate 403 is set in the middle of the dial 401 and is parallel to the scale lines on both sides of the dial 401 to ensure that the pointer plate 403 points to the scale line more clearly. The reset mechanism 405 is used to overcome the gravity of the external force line 202 and the friction of the rubber sealing piston 302 when the flap door is closed by its own gravity and the impact of the backflow water after the unit is shut down, and reset the pointer plate 403 along the reset line 404. Specifically, the reset mechanism 405 can be configured as a coil spring, or other components having the same or similar functions as the coil spring. In this embodiment, the stiffness coefficient of the coil spring is K=C×π×D 2 ×h×ρ×g / 4(N / m), where C is the margin coefficient, which is generally 1.1 to 1.3; D is the force transmission line diameter (m); ρ is the force transmission line density (kg / m); h is the force transmission line length from the end pull ring on the pull rod 402 to the steering wheel 204 (m); g is the gravitational acceleration, which is usually 9.81m / s 2 .

[0057] In particular, in order to ensure that the pointer plate 403 moves more smoothly when pointing to the scale line and reduce friction, a pair of guide rails 406 are symmetrically arranged on both sides of the pull rod 402 on the scale plate 401, and a pair of rail wheels 407 are arranged on the pointer plate 403 at positions corresponding to the guide rails 406. Figure 5 shown.

[0058] In addition, a pointer plate reset positioner 408 is provided on the pointer plate 403 to ensure that the pointer plate 403 is exactly at the position of the scale "0" when it is reset.

[0059] The flap door opening degree measuring device of the present invention has the following implementation principle: the flap door 102 opening angle is transmitted through the inner force transmission line 201, and then connected to the lower end of the connecting rod 303 passing through the rubber sealing piston 302 after passing through the transmission wheel 203 and the steering wheel 204, and then the pull rod 402 is pulled through the outer force transmission line 202 connected to the upper end of the connecting rod 303 to drive the pointer plate 403 to display the scale. When the unit is started and operated, the flap door 102 is automatically opened under the impact of the water flow, and the inner force transmission line 201 is driven to pass through the transmission wheel 203 and the steering wheel 204, and then the rubber sealing piston 302 is linked to move downward; while the rubber sealing piston 302 moves downward, it passes through the outer force transmission line 202 and drives the pull rod 402 to move downward. At this time, the flap door opening angle and working state can be read intuitively in real time through the position of the pointer plate 403 in the dial 401. When the unit is shut down, the flap door automatically closes due to its gravity or the pressure of backflow water. Since the coil spring in the vertical ruler has a certain restoring force, it drives the pointer plate 403 to move upward, and the linkage pull rod 402, the external force transmission line 202 and the rubber sealing piston 302 move upward. While the rubber sealing piston 302 moves upward, the internal force transmission line 201 is reset through the steering wheel 204 and the transmission wheel 203. When the unit is started next time, this process is repeated.

[0060] When the flap door has a double-door structure, the working system should consist of two sets, and the working principle is the same as that of the single-door structure.

[0061] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0062] 1. A flap door opening measuring device provided by the present invention connects one end of an internal force transmission line in an underwater flap door connecting tube to the flap door, and the other end is movably connected to the lower end of a connecting rod passing through a rubber sealing piston after being transmitted by a transmission wheel and turned by a steering wheel; one end of an external force transmission line outside the flap door connecting tube is movably connected to the upper end of the connecting rod, and the other end is connected to the lower end surface of a pointer plate after being transmitted by a transmission wheel, and the upper end surface of the pointer plate is connected to a reset structure through a reset line. The flap door opening measuring device of the present invention can intuitively display the opening angle of the underwater flap door through the display mechanism on the water through the cooperation between the transmission wheel and the inner and outer force transmission lines during the measurement work. The entire measuring device has no mechanical connection devices such as levers and hinges, thereby effectively avoiding the phenomenon of jamming, deformation and the like when mechanical moving parts fail. In addition, due to its simple structure, reliable operation and durability, it effectively solves the problems of high production and installation requirements and cumbersome and difficult inspection and maintenance work of the flap door measuring device in the prior art. At the same time, the flap door opening measuring device of the present invention can simply and intuitively observe the flap door opening angle and its working state, and can be promoted and applied in the fields of water conservancy systems, urban flood control and drainage, etc.

[0063] 2. In the present invention, the transmission wheel and the steering wheel are non-rotatable relative to their fixed brackets, and there is sliding friction between them and the power transmission line, which effectively avoids the occurrence of mechanical failures in the system; the rail wheel on the pointer plate is rotatable relative to its bracket, and there is only rolling friction when it moves in the guide rail; and the transmission wheel, the steering wheel and the rail wheel on the pointer plate are all made of high-hardness, ultra-smooth and wear-resistant polyurethane, which effectively reduces the mechanical friction loss of the whole system and improves the operation efficiency of the unit;

[0064] 3. In the present invention, the rubber sealing piston is fixed to the middle part of the stainless steel connecting rod by the connection rod with threads and the nuts at the upper and lower ends of the rubber sealing piston. When the rubber sealing piston is damaged by friction due to long-term operation, only the rubber sealing piston needs to be replaced, and the remaining parts in the whole system can continue to be used, thereby reducing the cost of later inspection and maintenance.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flap door opening measuring device, used for measuring the opening of a flap door (102) in a flap door mechanism (1), the flap door mechanism (1) comprising a door seat (101), a flap door (102), and a flap door connecting pipe (103), the door seat (101) being connected to the flap door connecting pipe (103), the flap door (102) being connected to the door seat (101) via a hinge, characterized in that: The device comprises: a force transmission mechanism (2), a line outlet cavity mechanism (3), and a display mechanism (4); The force transmission mechanism (2) comprises an inner force transmission line (201), an outer force transmission line (202), a plurality of transmission wheels (203) and at least one steering wheel (204); The wire outlet cavity mechanism (3) comprises a wire outlet cavity (301), a rubber sealing piston (302), a connecting rod (303), and a wire outlet cavity sealing cover plate (304) with a wire outlet hole reserved therein; The display mechanism (4) comprises a dial (401), a pull rod (402), a pointer plate (403), a reset line (404), and a reset mechanism (405); The outlet cavity mechanism (3) is fixed to a through hole (104) opened on the flap door connecting tube (103); the rubber sealing piston (302) is arranged in the outlet cavity (301) and is slidably connected to the inner wall of the outlet cavity (301); the outlet cavity sealing cover plate (304) is detachably connected to the upper end of the outlet cavity (301); at least one steering wheel (204) is fixed to the inner wall of the flap door connecting tube (103) through a steering wheel bracket (206); a plurality of transmission wheels (203) are fixed to the inner wall of the flap door connecting tube (103) and the wall outside the flap door connecting tube (103) through a transmission wheel bracket (207) along the direction of the force transmission line; the inner force transmission One end of the wire (201) is fixed on the flap door, and the other end passes through the transmission wheel (203) and the steering wheel (204) in sequence and is movably connected to the lower end of the connecting rod (303), and the connecting rod (303) passes through the rubber sealing piston (302); one end of the external force transmission wire (202) is movably connected to the upper end of the connecting rod (303), and the other end passes through the outlet hole of the outlet cavity sealing cover plate (304) and is connected to the lower end of the pull rod (402), the upper end of the pull rod (402) is connected to the lower end surface of the pointer plate (403), and the upper end surface of the pointer plate (403) is connected to the reset mechanism (405) through the reset wire (404); The through hole (104) on the flap door connecting tube (103) and the reserved wire outlet hole on the wire outlet cavity sealing cover plate (304) are located on the same central axis; It also comprises a force transmission line positioning cavity (205), wherein the force transmission line positioning cavity (205) is fixed in a groove opened on the wheel body of the steering wheel (204) and the transmission wheel (203) along the direction of the force transmission line.

2. The device according to claim 1, characterized in that The steering wheel bracket (206) and the transmission wheel bracket (207) are both adjustable brackets, and the steering wheel (204) is non-rotatably connected to the steering wheel bracket (206) and the transmission wheel (203) is non-rotatably connected to the transmission wheel bracket (207).

3. The device according to claim 1, characterized in that The connecting rod (303) is provided with threads, which cooperate with nuts provided on the upper and lower sides of the rubber sealing piston (302) to lock and position the rubber sealing piston (302).

4. The device according to claim 1, characterized in that A pair of guide rails (406) is arranged on the scale plate (401), and a pair of rail wheels (407) are arranged at positions on the pointer plate (403) corresponding to the guide rails (406).

5. The device according to claim 4, characterized in that The two sides of the scale plate (401) are respectively marked with length scale lines and angle scale lines.

6. The device according to claim 1, characterized in that The pointer plate (403) is provided with a pointer plate resetting positioner (408).

7. The device according to claim 1, characterized in that The reset mechanism (405) is a coil spring.

8. The device according to claim 1, characterized in that The inner force transmission line (201) and the outer force transmission line (202) are both formed by spirally winding stainless steel wires.

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