CN112904044A

CN112904044A - Mechanical structure of water flow speed sensor

Info

Publication number: CN112904044A
Application number: CN202110131366.2A
Authority: CN
Inventors: 张涛; 张锐奇
Original assignee: Anhui University
Current assignee: Anhui University
Priority date: 2021-01-30
Filing date: 2021-01-30
Publication date: 2021-06-04
Anticipated expiration: 2041-01-30
Also published as: CN112904044B

Abstract

The invention relates to the field of sensors, in particular to a mechanical structure of a water flow speed sensor. The sensor comprises a fixed flange, a sensor body, a movable sleeve, a handle, a stop block, a limit screw, an end cover plate, a long shaft and a short shaft. The sensor body can conveniently extend out of and retract into the fixed flange by utilizing the limiting block, the clip groove structure and the pin rod structure of the handle.

Description

Mechanical structure of water flow speed sensor

Technical Field

The invention relates to the field of sensor structures, in particular to a mechanical structure of a water flow speed sensor.

Background

The water flow rate sensor is a conventional general purpose instrument for making flow rate measurements in hydrology tests. There are many ways to measure water flow velocity, such as wind wheel, propeller, acoustic doppler, ultrasound. The water flow speed sensor is mainly used on a ship, and the relative navigational speed of the ship is calculated according to the navigational speed relation between the dynamic pressure and the flow speed on the basis of measuring the dynamic pressure generated by the water relative to the ship. Two pressure sensors are arranged at the bottom of the sensor body, one is right opposite to the water flow direction, and the other is downward. When the ship sails, the sensor facing to the water flow direction faces the water body, and is under the action of static pressure and dynamic pressure generated by water body impact besides the action of static pressure, so that the detected pressure is the sum of the static pressure and the dynamic pressure, the pressure detected by the downward sensor is the static pressure, and the water flow speed is calculated by measuring the difference between the two pressures. And when the water body flow velocity can be ignored, the calculated velocity is the ship motion velocity. When the sensor does not work, the sensor body needs to be retracted into the fixed flange, and the bottom of the flange is covered by the end cover, so that the protection effect is achieved. During operation, the end cover needs to be opened, and the sensor body extends out of the fixing flange. Retraction and extension both require manual operation, and in the retracted and extended states, the sensor body both requires position fixing and cannot loosen. The invention patent of publication number CN107044900A discloses a swing rod locking device, which is a mechanical structure of a water speedometer, and the structure effectively realizes the locking of the extension and retraction of a pressure probe of the water speedometer by utilizing the swing rod principle and the spring characteristic. If the sensor is in fault and needs to be maintained and replaced, the flange is integrally detached to replace the sensor.

Disclosure of Invention

Technical problem to be solved

The invention provides a mechanical structure of a water flow speed sensor, which can realize the quick replacement of a sensor body under the condition of not dismantling a fixing flange on a ship.

(II) technical scheme

The utility model provides a rivers velocity sensor mechanical structure, including the sensor body, mounting flange, the movable sleeve, a handle, the dog, stop screw, the end cover apron, the major axis, the minor axis, the sensor body axial inserts in the mounting flange, sensor body and movable sleeve fixed connection, movable sleeve cover is on mounting flange, the handle is installed in the movable sleeve both sides, the dog is connected with mounting flange, stop screw installs on movable sleeve, the major axis is fixed on mounting flange, the end cover apron is connected with the end cover, the end cover can remove along the major axis on the major axis, the minor axis is connected with the sensor body, minor axis and end cover swing joint.

Preferably, the side wall of the fixing flange is provided with symmetrical holes, and the pin rod at the end part of the handle can be inserted into the holes.

Preferably, the side wall of the movable sleeve is provided with a return groove.

Preferably, the spring is arranged in the handle, and the pin rod is arranged at the end part of the handle.

Preferably, the included angle of the axes corresponding to the central symmetry line of the two parallel grooves of the return groove on the side wall of the movable sleeve is consistent with the angle of the short shaft capable of rotating in the special-shaped groove on the end cover plate.

Preferably, the end cap is slotted.

Preferably, the end cover plate is provided with a special-shaped groove, and the diameter of a round hole in the special-shaped groove is larger than that of a boss at the end part of the short shaft.

Preferably, the end part of the short shaft is provided with a boss, and the diameter of the boss is smaller than the width of the groove on the end cover and larger than the width of the special-shaped groove on the cover plate of the end cover.

Preferably, the end of the long shaft is provided with a boss.

(III) advantageous effects

The invention provides a mechanical structure of a water flow velocity sensor, which has the following advantages:

when the sensor is at two limit positions of retraction or extension, the pin rods at the end parts of the left handle and the right handle are inserted into the holes on the side surfaces of the fixed flanges, so that the sensor is ensured to be stable and reliable in the extension or retraction state.

Because the end cover is not fixedly connected on the sensor body, the sensor body can be directly drawn out from the fixing flange, and the sensor can be quickly replaced.

The side face of the movable sleeve is provided with a clip groove structure, and the clip groove structure is combined with a limit screw, so that the sensor body is convenient to assemble on one hand, and the reliability of the up-and-down movement of the sensor body is ensured on the other hand.

Drawings

The advantages of the invention will become more apparent with reference to the embodiments shown in the following drawings:

FIG. 1 is a schematic rear view of a water flow rate sensor body in an extended state;

FIG. 2 is a schematic front view of the water flow rate sensor body in an extended state;

FIG. 3 is a schematic front sectional view of the water flow rate sensor body in an extended state;

FIG. 4 is a schematic rear view of the water flow rate sensor body in a retracted state;

FIG. 5 is a schematic view of the end cap assembly;

FIG. 6 is a schematic view of a replacement sensor body;

in the drawings, the components represented by the respective reference numerals are listed below:

1-a sensor body, 2-a fixed flange, 3-a handle, 31-a handle end pin rod, 4-a movable sleeve, 41-a return groove, 5-a limiting screw, 6-a stopper, 7-a screw, 8-a long shaft, 9-a short shaft, 10-an end cover plate, 11-a screw, 12-an end cover, 13-a screw, 14-a first pressure sensor, 15-a second pressure sensor, 16-an upper limiting hole, 17-a lower limiting hole, 18-an end cover groove and 19-an end cover plate special-shaped groove.

Detailed Description

Fig. 1 is a schematic view of an embodiment of the present invention, which is a schematic view of the back side of a sensor body in an extended state. The sensor comprises a sensor body 1, a fixed flange 2, a handle 3, a movable sleeve 4, a clip groove 41, a limit screw 5, a stop block 6, a screw 7, a long shaft 8, a short shaft 9, an end cover plate 10, a screw 11 and an end cover 12. The 2 rounds of mounting flange have the mounting hole, are connected with boats and ships, and the mounting flange inner wall has annular groove, installs the rubber circle. The sensor body 1 is inserted into the fixing flange 2 and the rubber ring performs a sealing function (this part is not within the scope of the invention). The movable sleeve 4 is sleeved outside the fixed flange 2 from top to bottom, the side wall of the movable sleeve 4 is provided with a return groove 41, and the two sides of the movable sleeve 4 are provided with handles 3. The movable sleeve 4 is provided with a limit screw 5, the limit screw 5 is screwed to the bottom, and the end part of the limit screw is screwed into the clip groove 41. The stop 6 is connected with the fixed flange 2 through the screw 7, and the stop 6 is also positioned in the return groove 41, so that the movable sleeve 4 can only move up and down along the right groove of the return groove 41 in fig. 1 under the limitation of the stop 6 and the limit screw 5. The upper ends of the long shafts 8 are connected with the fixed flange 2 through threads, holes are formed in the end cover 12, and the two long shafts 8 penetrate through the holes in the end cover 12, namely the end cover 12 can slide along the axis of the long shaft 8 along the axis. The short shaft 9 is connected with the sensor body 1 through threads, and a circular boss is arranged at the lower end of the short shaft 9 and is movably connected with the end cover 12 and the end cover plate 13.

Fig. 2 is a schematic rear view of the sensor body in an extended state, and includes a sensor body 1, a fixed flange 2, a handle 3, a movable sleeve 4, a long axis 8, a short axis 9, an end cover plate 10, a screw 11, an end cover 12, a screw 13, a first pressure sensor 14, and a second pressure sensor 15. The first pressure sensor 14 and the second pressure sensor 15 are both mounted on the sensor body 1. As can be seen from fig. 2, the sensor body 1 is connected to the movable sleeve 4 by two screws 13.

Fig. 3 is a cross-sectional view of fig. 2 for clarity of the internal mechanical relationships. Wherein the section lines are not drawn between the sensor body 1 and the handle 3. The handle 3 is provided with a spring structure (the mechanism belongs to a common structure and is not shown in the figure), when the handle 3 is arranged on the movable sleeve 4, the handle 3 is pulled outwards, the pin rod 31 at the end part of the handle 3 can be pulled back, the hand is loosened, and the pin rod 31 extends out under the action of the spring. When the handle 3 is manually lifted upwards or pressed downwards, the handle 3 is firstly pulled outwards, the pin rod 31 is pulled back, the movable sleeve 4 can drive the sensor body 1 to move upwards and downwards, and meanwhile, the short shaft 9 connected with the sensor 1 can drive the end cover 12 to move upwards or downwards through the movable connection, so that the end cover 12 can open and close the fixed flange 4 and extend and retract the sensor body 1. After the sensor body 1 reaches the extending or retracting position, the handle 3 is loosened, the pin rod 31 at the end part of the handle 3 extends out under the action of the spring and is inserted into the lower limiting hole 17 or the upper limiting hole 16 on the fixing flange 4, and the position of the sensor body 1 is fixed.

Fig. 4 is a schematic rear view of the sensor body in a retracted state, and includes a sensor body 1, a fixed flange 2, a handle 3, a movable sleeve 4, a limit screw 5, a stopper 6, a screw 7, a long shaft 8, a short shaft 9, an end cover plate 10, an end cover 12, a second pressure sensor 15, an upper limit hole 16 and a lower limit hole 17 on the fixed flange 4. When the sensor body 1 is in an extending state, the pin rod 31 at the end part of the handle 3 is inserted into the lower limiting hole 17 on the fixing flange 4, and when the sensor body 1 is in a retracting state, the pin rod 31 at the end part of the handle 3 is inserted into the upper limiting hole 16 on the fixing flange 4, so that the position of the sensor body 1 can be stably and reliably fixed in the extending or retracting state.

Fig. 5 is a schematic view of the end cap assembly, including major axis 8, minor axis 9, end cap cover plate 10, screws 11, end cap 12, end cap annular groove 18, and end cap cover plate 10 profiled groove 19. The end cover plate 10 is fixed on the end cover 12 by screws 11. The profiled groove 19 in the end closure 10 consists of two parts: one part is a round hole, and the diameter of the round hole is larger than that of a boss at the tail end of the short shaft 9; the other part is an arc groove, and the width of the arc groove is larger than the diameter of the short shaft 9 and smaller than the diameter of a boss at the tail end of the short shaft 9. Therefore, the boss at the end of the short shaft 9 is inserted into the annular groove 18 of the end cover 12 through the circular hole of the special-shaped groove 19 on the end cover plate 10, and then rotated by an angle along the special-shaped groove 19 (under the angle, the sensor body 1 is in a state of being capable of normally extending out and retracting, namely, the included angle between the axes corresponding to the central symmetry lines of the two parallel grooves of the movable sleeve side wall returning groove is consistent with the angle that the short shaft can rotate in the special-shaped groove on the end cover plate), and the boss of the short shaft 9 is constrained in the annular groove 18 on the end cover. When the stub shaft 9 is carried down and up by the sensor body 1, the end cap 12 will follow the stub shaft 9 to move together, thereby achieving opening and closing of the end cap 12.

Fig. 6 is a schematic view of a replacement sensor body. The sensor comprises a sensor body 1, a fixed flange 2, a handle 3, a movable sleeve 4, a limiting screw 5, a stop block 6 and a return groove 41 on the movable sleeve 4. The stop screw 5 is loosened and its end is screwed up from the clip groove 41 of the activating sleeve 4. Then, under the state that the sensor body 1 extends out, the handle 3 is firstly pulled outwards to withdraw the pin shaft at the front end of the handle 3, then the handle 3 is rotated horizontally to enable the movable sleeve 4 to horizontally rotate until being blocked by the stop 6, and at this time, the boss at the tail end of the short shaft 9 also rotates to the round hole part of the special-shaped groove 19 on the end cover plate 10. Then, the handle 3 is lifted upwards, the handle 3 drives the movable sleeve 4 to move upwards, the sensor body 1 is connected with the movable sleeve 4 through the screw 13 and therefore also moves upwards, the short shaft 9 is separated from the end cover 12, the handle 3 is continuously lifted upwards until the sensor body 1 is completely lifted out of the fixed flange 2, and replacement of the sensor body 1 is completed under the condition that the fixed flange 2 is not detached. The process of mounting the sensor body 1 is reversed from the above.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention.

Claims

1. The utility model provides a water velocity sensor mechanical structure, includes sensor body, mounting flange, movable sleeve, handle, dog, stop screw, end cover apron, major axis, minor axis, its characterized in that: the sensor comprises a sensor body, a movable sleeve, a handle, a limit block, a limit screw, a long shaft, an end cover plate and an end cover, wherein the sensor body is axially inserted into a fixed flange, the sensor body is fixedly connected with the movable sleeve, the movable sleeve is sleeved on the fixed flange, the handle is arranged on two sides of the movable sleeve, the limit block is connected with the fixed flange, the limit screw is arranged on the movable sleeve, the long shaft is fixed on the fixed flange, the end cover plate is connected with the end cover, the end cover can move on the long shaft along the long shaft, the short.

2. A water flow rate sensor mechanism according to claim 1, wherein: symmetrical holes are formed in the side wall of the fixed flange, and pin rods at the end parts of the handles can be inserted into the holes.

3. A water flow rate sensor mechanism according to claim 1, wherein: the side wall of the movable sleeve is provided with a return groove.

4. A water flow rate sensor mechanism according to claim 1, wherein: the included angle of the axes corresponding to the central symmetry line of the two parallel grooves of the return groove on the side wall of the movable sleeve is consistent with the angle of the short shaft capable of rotating in the special-shaped groove on the end cover plate.

5. A water flow rate sensor mechanism according to claim 1, wherein: the end cap is slotted.

6. A water flow rate sensor mechanism according to claim 1, wherein: the end cover plate is provided with a special-shaped groove, and the diameter of a round hole in the special-shaped groove is larger than that of a boss at the end part of the short shaft.

7. A water flow rate sensor mechanism according to claim 1, wherein: the end part of the short shaft is provided with a boss, the diameter of the boss is smaller than the width of the groove on the end cover and larger than the width of the special-shaped groove on the end cover plate.

8. A water flow rate sensor mechanism according to claim 1, wherein: the end part of the long shaft is provided with a boss.