CN115503880A - A fast indicating device for casting and unloading anchors of pontoon bridge equipment - Google Patents

Abstract

The invention relates to the technical field of anchor detection, and discloses a quick anchor drop-in and pull-out indicating device for pontoon bridge equipment, which comprises a marked floating object, a reflecting module, a sonar unit and an offset compensator, wherein the marked floating object is fixedly connected to an anchor rod through a connecting rope and used for marking the position of the anchor rod; the condition of exposing the position of the door bridge can be avoided through the underwater marked floater, the marked floater at the tail end of the anchor rod is positioned by two positioning methods through active emission and passive reflection of sonar, so that the position of the anchor rod is quickly judged, the deviation condition of the marked floater influenced by water flow is compensated by a deviation detector, the marked floater is compensated by a deviation compensator, the marked floater overcomes the defect that the water flow tends to be vertical, and the marking accuracy of the marked floater on the anchor rod is ensured.

Description

A fast indicating device for casting and unloading anchors of pontoon bridge equipment

technical field

The invention relates to the technical field of anchor detection, in particular to a fast anchor indication device for pontoon bridge equipment.

Background technique

When the pontoon bridge troops carry out the support task of crossing the river, they usually adopt the method of quickly erecting and withdrawing the pontoon bridge. In the case of serious enemy threats, the withdrawal speed of the pontoon bridge will directly affect the survival of the task force on the battlefield. A key link is whether it is particularly important to be able to quickly find the position of the underwater anchor. In daily training, it is also found that in the withdrawal project of the heavy pontoon bridge, the traditional anchor lifting operation usually requires the head of the bridge to rely on his own actual combat experience and artificially judge the direction of the anchor. The underwater position of the anchor, the error of this method is too large, and the judgment of the anchor position is often inaccurate, which often leads to slow withdrawal time and low operating efficiency. It is very easy to press the anchor steel under the moving gate bridge. In this case, the gate bridge length cannot judge its position through experience. If you act rashly without knowing the anchor position, once it is handled improperly, the gate bridge will rollover The serious accident caused very serious consequences. In order to solve the problem of rapid positioning of underwater anchors and improve the efficiency of anchor lifting operations, our team designed this rapid indicator device for the position of underwater anchors, so that the gate bridge length can quickly determine the anchor. In the specific position underwater, and then safely and smoothly complete the error operation, and improve the overall operation efficiency.

Contents of the invention

The object of the present invention is to provide a fast indicating device for casting and unloading of pontoon bridge equipment, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A rapid anchorage indicating device for pontoon equipment, including a marker float fixedly connected to the anchor rod through a connecting rope for marking the position of the anchor rod, a reflection module installed above the marker float for reflecting acoustic signals, The sonar unit installed on the top of the reflector module for emitting acoustic signals is detachably connected to the offset compensation rail on the peripheral side of the marker floater, and is slidably connected to the offset compensation rail peripheral side for adjusting the An offset compensator for applying compensation power to the lowest point of the marker floater's tilt, and an offset detector for judging the offset state of the marker floater and providing a reference value for power selection of the offset compensator.

As a further solution of the present invention: the marker float includes a partition plate distributed up and down and a bottom case, the partition plate is fixedly connected with the bottom case, the bottom case is a cone, the There are several water pressure overcoming holes on the periphery of the bottom casing, and the bottom end of the bottom casing is provided with fixed holes for fixing through the connecting rope, and the reflection module is fixed on the partition plate On the top surface, the reflective module is provided with a mounting groove for fixing the sonar unit. The reflective module has four sets of circularly distributed combination surfaces, and each set of combination surfaces is composed of three mutually perpendicular reflective surfaces.

As a further solution of the present invention: an outer ring is fixedly connected to the joint between the partition plate and the bottom casing, the offset compensation rail includes a top ring and a bottom ring, and the top ring and the The upper and lower end faces of the bottom ring located on the outer ring are fixedly connected by screws, the offset compensator is slidably connected between the top ring and the bottom ring, and the opposite sides of the top ring and the bottom ring are opened. There is an annular chute, and the upper and lower end surfaces of the offset compensator are fixedly connected with sliding posts, and the sliding posts are slidably connected inside the annular chute.

As a further solution of the present invention: the side of the offset compensator away from the outer ring is equipped with a reverse thrust blade, and the reverse thrust blade is controlled and driven by the drive motor inside the offset compensator, so A controller for controlling the speed of the driving motor is installed inside the offset compensator, and a block is slidably connected to the side of the offset compensator close to the offset compensation rail. The clamping block is an electromagnet with the same magnetic level, the clamping block is elastically connected to the offset compensator through a spring, and the peripheral side of the outer ring is fixedly connected with locking teeth that match the clamping block.

As a further solution of the present invention: the inside of the offset detector has a hollow cavity, and the inner wall of the offset detector is fixedly connected with two sets of annularly distributed liquid level sensors, and the two sets of liquid level sensors are distributed up and down, Wherein the maximum distance between the two liquid level sensors on the same horizontal plane is smaller than the inner diameter of the offset detector, and the circuit of the liquid level sensor passes through the hollow cavity and is connected to the data transmission module inside the receiving cavity for signal connection.

active signaling

The marked floating object is fixed on the anchor rod through the connecting rope. When the anchor is dropped, the anchor is affected by gravity and penetrates into the bottom sludge. At this time, due to the setting of the connecting rope and the buoyancy of the partition board, the partition board floats above the anchor rod. , to display the underwater position information by marking the floating object instead of the anchor. Since the sonar unit is installed on the top of the reflection module, the sonar unit can generate a sound wave signal from bottom to top at this time, and the anchor position can be determined through the sonar information of the floating object, and the display After the terminal captures the sonar signal, it analyzes it and displays it through the display terminal. At this time, the unmanned ship is placed on the water surface, and the unmanned ship is controlled to reach above the anchor. At this time, the operator can observe the unmanned ship by observing the unmanned ship on the water surface. anchor position;

passive position detection

The unmanned ship is equipped with water sonar. When the sonar signal of the sonar unit cannot be received, the built-in water sonar of the unmanned ship is turned on at this time to actively detect the underwater environment. When floating objects are detected, the There is a reflection module on the floating object. At this time, multiple reflection surfaces have an omnidirectional reflection structure, which can enhance the reflection effect of the acoustic signal, and feedback the image of the target position with obvious characteristics on the detection display terminal;

Current Tilt Correction

At this time, the marked floating object is affected by the water flow, causing the connecting rope to tilt, and the marked floating object deviates from the anchor rod. Since the offset compensator has its own weight, the offset compensator will be affected by the inclined marked floating object at this time, so that the offset compensation The detector slides to the lowest point along the offset compensation rail, and the direction of the lowest point where the offset compensator is located at this time is directly behind the marked floating object in the direction of water flow. At this time, the offset detector is tilted by the marked floating object, resulting in The liquid level has a tilt change. At this time, the liquid level sensor at the high point cannot collect liquid information. At this time, according to the collection status of the liquid level sensor as the reference data for the speed adjustment of the reverse thrust fan blade, the liquid level status of the liquid level sensor is Through the signal line inside the hollow cavity, it is transmitted to the data transmission module inside the receiving cavity, and then transmitted to the outside through the data transmission module. The external adjustment is realized by controlling the electromagnet and the controller. The electromagnet supplies power to make the electromagnet magnetic, and the electromagnet pushes the block to the outer ring, so that the block and the teeth mesh with each other to realize the locking of the offset compensator. At this time, start the drive motor to make the counter Push the fan blade to work, and the speed of the reverse push fan blade increases gradually from low to high until all the liquid level sensors have collected the liquid level information. The reverse thrust fan blade and the water flow form an equilibrium state, so that the position of the marker float is corrected, and the connecting rope is close to a vertical state. At this time, the marking accuracy of the marker float on the tail end of the anchor rod is improved.

Compared with prior art, the beneficial effect of the present invention is:

The location of the gate bridge can be avoided through the underwater marked floating objects. At the same time, the active emission and passive reflection of the sonar are used to locate the marked floating objects at the end of the anchor rod, so as to quickly determine the position of the anchor rod. The offset detector compensates for the offset of the marker float affected by the water flow through the offset compensator, so that the marker float overcomes the water flow and tends to be vertical, ensuring the marking accuracy of the marker float on the anchor rod. The indicating device is more convenient for the gate bridge chief to quickly find the precise position of the anchor, adjust the axis of the pontoon bridge and carry out anchor lifting operations according to the instructions, and further improve the working efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is a three-dimensional schematic diagram of a pontoon bridge equipment throwing anchor fast indicating device;

Fig. 2 is a front view sectional schematic diagram of a kind of pontoon equipment throwing anchor fast indicating device;

Fig. 3 is a multi-angle change schematic diagram of a fast indicating device for casting and lifting anchors of pontoon equipment;

Fig. 4 is a schematic diagram of the use of a fast indicating device for casting and lifting anchors of pontoon equipment;

In the figure: 1, marking floating objects; 11, partition plate; 111, receiving chamber; 12, bottom cover; 121, water pressure overcoming hole; 122, fixed perforation; 13, connecting rope; 14, outer ring; 141, 2. Offset compensation rail; 21. Top ring; 22. Bottom ring; 23. Annular chute; 3. Offset compensator; 31. Reverse thrust fan blade; 311. Drive motor; 32. Electromagnet; 33. Block; 34. Sliding column; 35. Controller; 4. Offset detector; 41. Hollow cavity; 42. Liquid level sensor; 43. Data transmission module; 5. Reflection module; 51. Installation slot; 52 , Sonar unit.

detailed description

Please refer to Fig. 1-Fig. 4, composition of the present invention

It includes a marker float 1 fixedly connected to the anchor rod through a connecting rope 13 for marking the position of the anchor rod, a reflection module 5 installed above the marker float 1 for reflecting the acoustic signal, and installed on the top of the reflection module 5 for emitting The sonar unit 52 of the sound wave signal is detachably connected to the offset compensation rail 2 on the peripheral side of the marker float 1, and is slidably connected to the offset compensation rail 2 on the peripheral side of the offset compensation rail 2 to apply the deflection compensation power to the lowest point of the marker float 1. A displacement compensator 3, and an offset detector 4 for judging the offset state of the marker floater 1 and providing a reference value for the power selection of the offset compensator 3, the marker floater 1 includes a partition plate 11 distributed up and down and a bottom cover Shell 12, partition plate 11 and bottom cover shell 12 are fixedly connected, and bottom cover shell 12 is a cone, and bottom cover shell 12 peripheral side is provided with several water pressure overcoming holes 121, and the peripheral side bottom end of bottom cover shell 12 is provided with useful Through the fixed perforation 122 fixed by the connecting rope 13, the reflection module 5 is fixed on the top surface of the partition plate 11. The reflection module 5 is provided with a mounting groove 51 for fixing the sonar unit 52. The reflection module 5 has four sets of annular Distributed combination surfaces, each group of combination surfaces is composed of three mutually perpendicular reflective surfaces, the connection between the partition plate 11 and the bottom cover 12 is fixedly connected with the outer ring 14, and the offset compensation rail 2 includes the top ring 21 and the bottom ring 22. The top ring 21 and the bottom ring 22 are located on the upper and lower end surfaces of the outer ring 14 and are fixedly connected by screws. The offset compensator 3 is slidably connected between the top ring 21 and the bottom ring 22. The opposite sides of the top ring 21 and the bottom ring 22 are An annular chute 23 is provided, and the upper and lower end surfaces of the offset compensator 3 are fixedly connected with a sliding column 34, which is slidably connected inside the annular chute 23, and the side of the offset compensator 3 away from the outer ring 14 is installed with The reverse thrust fan blade 31 is controlled and driven by the drive motor 311 inside the offset compensator 3. A controller 35 for controlling the speed of the drive motor 311 is installed inside the offset compensator 3. The offset compensator 3 is close to One side of the offset compensating rail 2 is slidably connected with a clamping block 33. An electromagnet 32 with the same magnetic level as the clamping block 33 is installed inside the offset compensator 3. The clamping block 33 and the offset compensator 3 are elastically connected by a spring. The outer ring The peripheral side of 14 is fixedly connected with the locking teeth 141 matched with the block 33, the inside of the offset detector 4 has a hollow cavity 41, and the inner wall of the offset detector 4 is fixedly connected with two sets of annularly distributed liquid level sensors 42, Two groups of liquid level sensors 42 are distributed up and down, wherein the maximum distance between the two liquid level sensors 42 on the same horizontal plane is less than the inner diameter of the offset detector 4, and the lines of the liquid level sensors 42 pass through the hollow cavity 41 and the inside of the receiving cavity 111. The data transmission module 43 is connected with signals.

The mark floating object 1 is mainly connected to the anchor rod by the connecting rope 13. After the bridge breaks down, the mark float 1 will go deep into the water with the anchor rod, and the anchor head will sink into the mud. At this time, the dividing plate 11 itself has buoyancy. The bottom cover 12 is connected to the anchor rod through the connecting rope 13 through the fixed perforation 122, so that the mark floating object 1 is affected by the buoyancy of the partition plate 11, so that the partition plate 11 will not go deep into the sludge with the anchor rod, ensuring that the mark The normal operation of the floating object 1, and the side of the bottom cover shell 12 is provided with a water pressure overcoming hole 121, the shape of the bottom cover shell 12 is conical, which can alleviate the influence of the water pressure on the floating object, and the outer ring 14 is fixedly connected to the branch. At the connection between the partition plate 11 and the bottom case 12, the diameter of the outer ring 14 is larger than the diameters of the partition plate 11 and the bottom case 12 to provide a mounting surface for the installation of the subsequent offset compensation rail 2. There are several openings on the outer ring 14. A ring-shaped hole is mainly for the fixed connection of the follow-up offset compensation rail 2;

The offset compensation rail 2 is fixed with the mark floating object 1 by disassembling and connecting. The purpose of disassembly is to use it in some areas with slow water flow. Due to the slow water flow, the offset influence error of the offset compensation rail 2 can be ignored. , just use the marker float 1 directly, and the offset compensation rail 2 is mainly used for turbulent rivers. At this time, the flow velocity will cause the marker float 1 to be offset to one side under the influence of the connecting rope 13. At this time, the connecting rope 13 In the inclined state, at this time, there is an error between the position of the marked floater 1 and the actual anchor rod position, resulting in inaccurate measurement. Since the top ring 21 and the bottom ring 22 are closed-loop structures, it is more convenient to use the upper and lower fit and fix methods. Convenient, at this time the top ring 21 slides downward from the reflection module 5 to contact the outer ring 14, the bottom ring 22 slides upward from the bottom cover 12 to contact the outer ring 14, and the top ring 21 and the bottom ring 22 are fixedly connected by screws At this time, the offset compensation rail 2 forms an annular slide rail, which provides a sliding space for the offset compensator 3, so that the offset compensator 3 can rotate on the offset compensation rail 2, and adjust the offset compensator 3 to the offset The direction of force applied by the compensation rail 2;

The offset compensator 3 mainly slides between the top ring 21 and the bottom ring 22, and the top and bottom of the offset compensator 3 are fixed with a sliding column 34. At this time, the sliding column 34 cooperates with the annular chute 23 to slide to make the offset The compensator 3 will not slip outside the offset compensation rail 2, and the side of the offset compensator 3 away from the offset compensation rail 2 is equipped with a reverse thrust fan blade 31, which is driven by the inside of the offset compensator 3 The motor 311 is driven to obtain power, and the thrust of the marker float 1 is realized by pushing back the fan blade 31, so that the marker float 1 can overcome the water flow, and the inclination angle of the reverse push fan blade 31 is infinitely close to vertical, so that the marker float 1 is anchored The calibration accuracy of the rod is increased;

The offset detector 4 is fixed on the bottom of the partition plate 11. In order to ensure that the power provided by the reverse thrust fan blade 31 to the marked floating object 1 can be offset by the water flow, the speed of the reverse thrust fan blade 31 needs to be increased at this time, so that The thrust of the reverse push fan blade 31 to the mark floater 1 is increased, so an offset detector 4 is provided. The offset detector 4 is spherical, and the inner wall of the offset detector 4 is filled with filling liquid, and the volume of the filling liquid is smaller than the offset detector. half of the volume of the spherical inner cavity of the displacement detector 4, at this time, several liquid level sensors 42 are arranged inside the displacement detector 4, and the two groups of liquid level sensors 42 are distributed circularly with the center of the circle of the displacement detector 4 as the center. At the same time, the annular distribution radii of the two groups of liquid level sensors 42 are smaller than the radius of the spherical cavity of the offset detector 4. The purpose of this design is to prevent the entire device from being entangled by foreign objects or ropes, etc., causing the marker floater 1 to turn over. At this time, since the liquid level sensor 42 distributed in the lower half of the offset detector 4 rotates to the upper half, and at this time, when multiple liquid level sensors 42 cannot collect liquid information, the separation plate can be quickly judged 11 state, in the normal tilting state, the liquid level remains horizontal, and the offset detector 4 is tilted under the influence of the mark floater 1. At this time, the liquid level sensor 42 on one side cannot receive the liquid level information. The driving power of the pushing fan blade 31 is adjusted until all the liquid level sensors 42 collect the liquid level information, that is, it is vertical, and at this time, the thrust applied by the reverse pushing fan blade 31 to the marked floating object 1 and the water flow are in balance;

The reflection module 5 is mainly fixed on the top of the partition plate 11. At this time, the reflection module 5 is composed of a cross plate and a bottom plate. The top of the cross plate is provided with an installation groove 51. The installation groove 51 provides an installation space for the sonar unit 52, so that the sonar unit 52 is fixed more stably. At this time, the reflective module 5 forms four reflective units with three vertical planes, and performs signal enhancement for subsequent anti-detection.

Please refer to Fig. 1-Fig. 4, the usage mode of the present invention

active signaling

The marked floating object 1 is fixed on the anchor rod through the connecting rope 13. When the anchor breaks down, the anchor is affected by the gravity and goes deep into the sludge at the bottom of the water. 1 floats above the anchor rod, and displays the underwater position information by marking the floating object 1 instead of the anchor. Since the sonar unit 52 is installed on the top of the reflection module 5, the sonar unit 52 can generate acoustic signals from bottom to top at this time. The position of the anchor is determined by the sonar information of the floating objects, the display terminal captures the sonar signal and analyzes it, and displays it through the display terminal. At this time, the unmanned ship is placed on the water surface, and the unmanned ship is controlled to reach above the anchor. At this time, the operator The position of the anchor can be observed by observing the unmanned ship on the water surface;

passive position detection

Water sonar is installed on the unmanned ship. When the sonar signal of the sonar unit 52 cannot be received, the built-in water sonar of the unmanned ship is turned on at this time to actively detect the underwater environment. When floating objects are detected, Because there is a reflection module 5 in the floating object, multiple reflection surfaces have an omnidirectional reflection structure at this time, which can enhance the reflection effect of the sound wave signal, and feedback the target position image with obvious characteristics on the detection display terminal. The built-in single-chip microcomputer of the unmanned ship uses wireless The decoding module PT2272 receives the signal from the sonar generating module PT2262, outputs a PWM signal to control the driver of the DC motor, controls the start, turn, and stop of the unmanned ship, so that the unmanned ship can rotate around to the water surface marked with floating object 1;

Current Tilt Correction

At this time, the mark floater 1 is affected by the water flow, causing the connecting rope 13 to tilt, and the mark floater 1 deviates from the anchor rod. Since the offset compensator 3 has its own weight, the offset compensator 3 will be affected by the inclined mark floater 1 at this time. Influence, make the offset compensator 3 slide to the lowest point along the offset compensation rail 2, and the direction of the lowest point where the offset compensator 3 is located at this time is located directly behind the floating object 1 in the direction of water flow, and the offset detection at this time The device 4 is tilted by the marked floating object 1, resulting in a tilt change in the liquid level. At this time, the liquid level sensor 42 at the high point cannot collect liquid information. At this time, according to the collection status of the liquid level sensor 42, it is used as a reverse push fan blade 31 The reference data of the speed adjustment, the liquid level status of the liquid level sensor 42 is transmitted to the data transmission module 43 inside the receiving chamber 111 through the signal line inside the hollow cavity 41, and then transmitted to the outside through the data transmission module 43, and the outside is passed to the electromagnetic The iron 32 and the controller 35 control to realize the adjustment. At this moment, it is in the locked state. At this time, the electromagnet 32 is powered to make the electromagnet 32 magnetic, and the electromagnet 32 pushes the block 33 to the outer ring 14. , so that the locking block 33 and the locking tooth 141 are engaged with each other to realize the locking of the offset compensator 3. At this time, the drive motor 311 is started to make the reverse thrust blade 31 work, and the speed of the reverse thrust blade 31 gradually increases from low to high. After all the liquid level sensors 42 have collected the liquid level information, the mark floater 1 is in a vertical state at this time, and the speed of the reverse push fan blade 31 is fixed, so that the reverse push fan blade 31 and the water flow form an equilibrium state, and the mark floats The position of the object 1 is corrected, and the connecting rope 13 is close to a vertical state. At this time, the marking accuracy of the mark floating object 1 on the tail end of the anchor rod is improved.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technology of the present invention Any equivalent replacement or change of the scheme and its inventive concepts shall fall within the protection scope of the present invention.

Claims (5)

1. The utility model provides a quick indicating device of anchor of puting in of pontoon bridge equipment which characterized in that: include through connecting rope (13) fixed connection be used for marking the mark floater (1) of stock position on the stock, install the top of mark floater (1) is used for reflecting sound wave signal's reflection module (5), installs reflection module (5) top is used for transmitting sound wave signal's sonar unit (52), can dismantle the connection and be in offset compensation rail (2), the sliding connection of mark floater (1) week side are used for right offset compensation rail (2) week side is used for the compensation power is applyed to mark floater (1) slope minimum (3) and is used for judging mark floater (1) skew state does offset detector (4) that the power selection of offset compensator (3) provided reference value.

2. The device for rapidly indicating the mooring of a wippen bridge equipment as claimed in claim 1, wherein: mark floater (1) including division board (11) and end cover shell (12) that distribute from top to bottom, division board (11) with end cover shell (12) fixed connection, end cover shell (12) are the cone, a plurality of water pressure has been seted up to end cover shell (12) week side and has been overcome hole (121), the week side bottom of end cover shell (12) is seted up and is used for passing connect fixed perforation (122) that rope (13) are fixed, reflection module (5) are fixed the top surface of division board (11), it is right to offer on reflection module (5) be used for sonar unit (52) fixed mounting groove (51), reflection module (5) have the combined surface of four groups annular distributions, and every group combined surface comprises three mutually perpendicular's plane of reflection.

3. The device for rapidly indicating the anchor handling of pontoon bridge equipment as claimed in claim 2, wherein: division board (11) with the junction fixedly connected with outer loop (14) of bottom housing (12), skew compensation rail (2) are including top ring (21) and bottom ring (22), top ring (21) with bottom ring (22) are located the terminal surface passes through screw fixed connection about the last of outer loop (14), skew compensator (3) sliding connection be in top ring (21) with between bottom ring (22), annular spout (23) have all been seted up to top ring (21) with the opposite side of bottom ring (22), the equal fixedly connected with traveller (34) of the upper and lower terminal surface of skew compensator (3), traveller (34) sliding connection be in the inside of annular spout (23).

4. The device for rapidly indicating mooring of a wippen bridge equipment as claimed in claim 3, wherein: skew compensator (3) are kept away from one side of outer loop (14) is installed and is pushed back flabellum (31), push back flabellum (31) by skew compensator (3) inside driving motor (311) control drive, skew compensator (3) internally mounted has and is used for control controller (35) of driving motor (311) rotational speed, skew compensator (3) are close to skew compensation rail (2) one side sliding connection has fixture block (33), skew compensator (3) internally mounted have with the same electro-magnet (32) of fixture block (33) magnetic level, fixture block (33) with skew compensator (3) are through spring elastic connection, all sides fixedly connected with of outer loop (14) with fixture block (33) matched with latch (141).

5. The device for rapidly indicating the mooring of a wippen bridge equipment as claimed in claim 1, wherein: the inside of skew detector (4) has hollow chamber (41), the inner wall fixedly connected with of skew detector (4) two sets of annular distribution's level sensor (42), two sets of level sensor (42) distribute from top to bottom, wherein two on the same horizontal plane the maximum distance of level sensor (42) is less than the internal diameter of skew detector (4), the circuit of level sensor (42) passes hollow chamber (41) and the inside data transmission module (43) signal connection of receiving chamber (111).

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