Intelligent well lid state detection device

Abstract

The utility model discloses an intelligent manhole cover state detection device, which comprises a shell, the upper half part of the back of the shell is provided with an opening, a rotating shaft is arranged between the left inner side wall and the right inner side wall of the shell, the rotating shaft is close to the back opening of the shell, a turning plate is rotationally arranged on the rotating shaft, and the back half part of the turning plate penetrates through the back opening of the shell and is arranged outside the shell. A double-torsion spring is arranged on the rotating shaft, two torsion arms of the double-torsion spring abut against the position between the shell and the turning plate, and the bottom of the rear half part of the turning plate abuts against the lower edge of the rear opening of the shell and is kept horizontal; according to the device, the normally-open magnetic induction switch and the normally-closed magnetic induction switch are arranged in the shell, so that the device can be applied to specific places needing a normally-open contact and a normally-closed contact, and the magnetic steel assembly, the normally-open magnetic induction switch, the normally-closed magnetic induction switch and other core components are all arranged in the shell; only the rear half part of the turning plate is arranged outside the shell, so that external foreign matters can be effectively prevented from invading to influence normal operation of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent manhole covers, and particularly relates to an intelligent manhole cover state detection device. Background Art

[0002] The existing intelligent manhole cover state monitoring technologies are mainly realized in two ways. One is a contact mechanical switch, and the other is a mechanical positioning inductor. The contact mechanical switch relies on the contact state of mechanical contacts to transmit signals. However, in actual applications, the force on the contacts of this switch is extremely vulnerable to the influence of external pressing forces, which may cause the contacts to gradually wear during long-term use, thereby leading to poor contact problems. Poor contact will not only affect the stability of the signal, but also may cause false alarms or missed alarms, bringing unnecessary troubles to the monitoring of the manhole cover state. Compared with the contact mechanical switch, the mechanical positioning inductor uses a non-contact sensor as the sensing element and is not affected by external pressing forces. However, the moving mechanism of the mechanical positioning inductor usually adopts an open structure. Although this design has a simple structure, it also provides convenience for foreign object interference, which may cause the moving mechanism to jam and affect the normal operation of the switch. Moreover, the mechanical positioning inductor usually only has one contact, which limits its application in certain specific occasions. In some application scenarios, both normally open contacts and normally closed contacts are required, and the existing mechanical positioning inductors cannot meet this requirement.

[0003] Therefore, we design an intelligent manhole cover state detection device here. Content of the Utility Model

[0004] The purpose of the utility model is to provide an intelligent manhole cover state detection device for the deficiencies of the existing technology, so as to solve the problems raised in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An intelligent manhole cover state detection device includes a housing. The upper half of the rear surface of the housing is open. A rotating shaft is installed between the left and right inner side walls of the housing. The rotating shaft is close to the rear opening of the housing. A flap is rotatably installed on the rotating shaft. The rear half of the flap passes through the rear opening of the housing and is arranged outside the housing. A double torsion spring is arranged on the rotating shaft. The two torsion arms of the double torsion spring abut between the housing and the flap. The bottom of the rear half of the flap abuts on the lower edge of the rear opening of the housing and remains horizontal.

[0006] A magnetic steel assembly is installed at the front end of the flap. The front surface of the housing is fully open, and a sensor bracket is installed. A normally closed magnetic induction switch and a normally open magnetic induction switch are installed inside the sensor bracket. The normally closed magnetic induction switch is located directly in front of the magnetic steel assembly, and the normally open magnetic induction switch is located in the front lower oblique direction of the magnetic steel assembly.

[0007] Preferably, convex edges are provided on the left and right sides of the top of the outer shell, and first mounting holes are provided on the convex edges on both sides.

[0008] Preferably, the rear end of the flap is provided with a downward slope, and a second mounting hole is provided on the flap. The second mounting hole is located outside the outer shell and near the slope at the rear end of the flap.

[0009] Preferably, the intelligent manhole cover status detection device further includes an inner manhole cover. An installation column is provided at the bottom of the inner manhole cover. The height of the installation column is greater than or equal to the vertical height from the convex edge of the outer shell to the bottom surface of the outer shell. The outer shell can be directly installed at the bottom of the inner manhole cover with the top surface facing up by bolts passing through the first mounting holes, or the outer shell can be installed at the bottom of the installation column with the bottom surface facing up by bolts passing through the first mounting holes.

[0010] Preferably, the intelligent manhole cover status detection device further includes a trigger rod. External threads are provided on the trigger rod. A ball head is installed at the top end of the trigger rod. The trigger rod can pass through the second mounting hole on the flap and is fixed on the flap by two adjusting nuts.

[0011] Compared with the prior art, the present utility model provides an intelligent manhole cover status detection device, which has the following beneficial effects:

[0012] By arranging a normally open magnetic induction switch and a normally closed magnetic induction switch inside the outer shell, the device can be applied to specific places that require both normally open contacts and normally closed contacts. By arranging all core components such as the magnetic steel assembly, the normally open magnetic induction switch, and the normally closed magnetic induction switch inside the outer shell, only the rear half of the flap is left outside the outer shell, which can effectively prevent foreign objects from invading and affecting the normal operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the internal structure of the outer shell of the present utility model;

[0015] Figure 3 is a schematic diagram of the trigger rod structure of the present utility model;

[0016] Figure 4 is a schematic diagram of the opening of the inner manhole cover of the present utility model;

[0017] Figure 5 is a schematic diagram of the closing of the inner manhole cover of the present utility model;

[0018] Figure 6 is a schematic diagram of the opening of the outer manhole cover of the present utility model;

[0019] Figure 7This is a schematic diagram of the closure of the outer manhole cover of the present utility model.

[0020] Reference numerals: 1, outer shell; 1-1, convex edge; 1-2, first mounting hole; 2, rotating shaft; 3, flap; 3-1, bend; 3-2, second mounting hole; 4, double torsion spring; 5, magnetic steel assembly; 6, sensor bracket; 7, normally closed magnetic induction switch; 8, normally open magnetic induction switch; 9, trigger rod; 9-1, ball head; 10, adjusting nut; 11, well seat; 12, inner manhole cover; 12-1, mounting column; 12-2, long strip through hole; 13, outer manhole cover. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 7 , in this implementation: An intelligent manhole cover status detection device includes an outer shell 1. Please refer to Figure 1 , convex edges 1-1 are provided on the left and right sides of the top of the outer shell 1, first mounting holes 1-2 are provided on both convex edges 1-1, the upper half of the back of the outer shell 1 is open, a rotating shaft 2 is installed between the left and right inner side walls of the outer shell 1, the rotating shaft 2 is close to the opening at the back of the outer shell 1, a flap 3 is rotatably installed on the rotating shaft 2, the rear half of the flap 3 passes through the opening at the back of the outer shell 1 and is arranged outside the outer shell 1, a double torsion spring 4 is arranged on the rotating shaft 2, and the two torsion arms of the double torsion spring 4 abut between the outer shell 1 and the flap 3. The bottom of the rear half of the flap 3 abuts against the lower edge of the opening at the back of the outer shell 1 and remains horizontal. The use of the double torsion spring 4 helps to ensure that the flap 3 is evenly stressed on the rotating shaft 2, reduces the friction during flipping, and thus extends the service life of the flap 3. A downwardly inclined bend 3-1 is provided at the rear end of the flap 3, and a second mounting hole 3-2 is provided on the flap 3. The second mounting hole 3-2 is located outside the outer shell 1 and close to the bend 3-1 at the rear end of the flap 3. When an external force presses upward on the rear end of the flap 3, the flap 3 can rotate a certain angle around the rotating shaft 2 and simultaneously squeeze the double torsion spring 4. After the external force is withdrawn, under the elastic force of the double torsion spring 4, the flap 3 will return to its original position;

[0023] Please refer to Figure 2, a magnetic steel assembly 5 is installed at the front end of the flap 3. The front of the outer shell 1 is fully open, and a sensor bracket 6 is installed. A normally closed magnetic induction switch 7 and a normally open magnetic induction switch 8 are installed inside the sensor bracket 6. The normally closed magnetic induction switch 7 is located directly in front of the magnetic steel assembly 5, and the normally open magnetic induction switch 8 is located obliquely below the front of the magnetic steel assembly 5. The magnetic steel assembly 5 is the key component for triggering the normally closed magnetic induction switch 7 and the normally open magnetic induction switch 8. Under normal conditions, the magnetic steel assembly 5 is close to the normally closed magnetic induction switch 7, and the normally closed magnetic induction switch 7 is triggered. When the flap 3 is flipped by an external force, the magnetic steel assembly 5 moves away from the normally closed magnetic induction switch 7 and approaches the normally open magnetic induction switch 8, and the normally open magnetic induction switch 8 is triggered.

[0024] Please refer to Figures 4 - 7 , the intelligent manhole cover status detection device further includes an inner manhole cover 12. An installation column 12-1 is provided at the bottom of the inner manhole cover 12. The height of the installation column 12-1 is greater than or equal to the vertical height from the raised edge 1-1 of the outer shell 1 to the bottom surface of the outer shell 1. The outer shell 1 can be directly installed at the bottom of the inner manhole cover 12 with the top surface facing up by passing bolts through the first installation holes 1-2, or the outer shell 1 can be installed at the bottom of the installation column 12-1 with the bottom surface facing up by passing bolts through the first installation holes 1-2.

[0025] Please refer to Figure 3 , Figure 6 and Figure 7 , the intelligent manhole cover status detection device further includes a trigger rod 9. The trigger rod 9 is provided with an external thread. A ball head 9-1 is installed at the top end of the trigger rod 9. The trigger rod 9 can pass through the second installation hole 3-2 on the flap 3 and is fixed on the flap 3 by two adjusting nuts 10. The height of the ball head 9-1 of the trigger rod 9 can be adjusted by the adjusting nuts 10. A long strip through hole 12-2 through which the trigger rod 9 can pass is provided on the inner manhole cover 12.

[0026] The working principle and usage process of the present utility model:

[0027] Detection occasion of the inner manhole cover: Please refer to Figure 4 and Figure 5, the top surface of the outer shell 1 is directly installed at the bottom of the inner manhole cover 12, the rear end of the flap 3 is close to the edge of the inner manhole cover 12. When the inner manhole cover 12 is opened, the flap 2 is not subjected to external force extrusion. At this time, the flap 3 is in the horizontal initial state, the magnetic steel assembly 5 is close to the normally closed magnetic induction switch 7, the internal contacts of the normally closed magnetic induction switch 7 are connected, the two output pins of the normally closed magnetic induction switch 7 are short-circuited, the magnetic steel assembly 5 is far from the normally open magnetic induction switch 8, and the internal contacts of the normally open magnetic induction switch 8 are disconnected, and the two output pins of the normally open magnetic induction switch 8 are open-circuited. When the inner manhole cover 12 is closed, the edge of the well seat 11 squeezes the bend 3-1 of the flap 3 to make the bend 3-1 fit the bottom of the inner manhole cover 12. At this time, the flap 3 flips, the magnetic steel assembly 5 is far from the normally closed magnetic induction switch 7, the internal contacts of the normally closed magnetic induction switch 7 are disconnected, the two output pins of the normally closed magnetic induction switch 7 are open-circuited, the magnetic steel assembly 5 is close to the normally open magnetic induction switch 8, the internal contacts of the normally open magnetic induction switch 8 are connected, and the two output pins of the normally open magnetic induction switch 8 are short-circuited.

[0028] Detection scenario of the outer manhole cover: Please refer to Figure 6 and Figure 7 , the bottom surface of the outer shell 1 is installed upward at the bottom of the installation column 12-1, the ball head 9-1 of the trigger rod 9 is upward and higher than the well seat 11, the trigger rod 9 passes through the long strip through hole 12-2 on the inner manhole cover 12 and the second installation hole 3-2 on the flap 3, and the trigger rod 9 is fixed to the flap 3 with the adjusting nut 10. When the outer manhole cover 13 is opened, the trigger rod 9 is not subjected to external force extrusion. Under the pre-pressure of the double torsion spring 4, at this time, the flap 3 is in the horizontal initial state, the magnetic steel assembly 5 is close to the normally closed magnetic induction switch 7, the internal contacts of the normally closed magnetic induction switch 7 are connected, the two output pins of the normally closed magnetic induction switch 7 are short-circuited, the magnetic steel assembly 5 is far from the normally open magnetic induction switch 8, and the internal contacts of the normally open magnetic induction switch 8 are disconnected, and the two output pins of the normally open magnetic induction switch 8 are open-circuited. When the outer manhole cover 13 is closed, the outer manhole cover 13 presses down the trigger rod 9, and the trigger rod 9 squeezes the flap 3. At this time, the flap 3 flips, the magnetic steel assembly 5 is far from the normally closed magnetic induction switch 7, the internal contacts of the normally closed magnetic induction switch 7 are disconnected, the two output pins of the normally closed magnetic induction switch 7 are open-circuited, the magnetic steel assembly 5 is close to the normally open magnetic induction switch 8, the internal contacts of the normally open magnetic induction switch 8 are connected, and the two output pins of the normally open magnetic induction switch 8 are short-circuited.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent manhole cover status detection device, comprising a housing (1), characterized in that: The upper rear half of the shell (1) is open, a rotating shaft (2) is installed between the left and right inner side walls of the shell (1), the rotating shaft (2) is close to the rear opening of the shell (1), a flap (3) is rotatably installed on the rotating shaft (2), the rear half of the flap (3) passes through the rear opening of the shell (1) and is arranged outside the shell (1), a double torsion spring (4) is arranged on the rotating shaft (2), two torsion arms of the double torsion spring (4) are pressed between the shell (1) and the flap (3), and the bottom of the rear half of the flap (3) is pressed against the lower edge of the rear opening of the shell (1) and maintained horizontally; A magnetic steel assembly (5) is installed at the front end of the flap (3); the front of the housing (1) is fully open and is provided with a sensor bracket (6); a normally closed magnetic induction switch (7) and a normally open magnetic induction switch (8) are installed on the inner side of the sensor bracket (6); the normally closed magnetic induction switch (7) is located directly in front of the magnetic steel assembly (5), and the normally open magnetic induction switch (8) is located at a front oblique lower portion of the magnetic steel assembly (5).

2. The intelligent manhole cover status detection device according to claim 1, characterized in that: The top left and right sides of the housing (1) are provided with raised edges (1-1), and the raised edges (1-1) on both sides are provided with first mounting holes (1-2).

3. The intelligent manhole cover status detection device according to claim 1, characterized in that: The rear end of the flap (3) is provided with a bend (3-1) inclined downwards, and the flap (3) is provided with a second mounting hole (3-2). The second mounting hole (3-2) is located outside the housing (1) and close to the bend (3-1) at the rear end of the flap (3).

4. The intelligent manhole cover status detection device according to claim 2, characterized in that: The intelligent manhole cover state detection device further comprises an inner manhole cover (12), wherein a mounting column (12-1) is arranged at the bottom of the inner manhole cover (12), wherein the height of the mounting column (12-1) is greater than or equal to the vertical height from the raised edge (1-1) of the outer shell (1) to the bottom surface of the outer shell (1), and the outer shell (1) can be directly mounted on the bottom of the inner manhole cover (12) by passing bolts through the first mounting hole (1-2) with the top surface facing upwards, and the outer shell (1) can also be mounted on the bottom of the mounting column (12-1) by passing bolts through the first mounting hole (1-2) with the bottom surface facing upwards.

5. The intelligent manhole cover status detection device according to claim 3, characterized in that: The intelligent manhole cover status detection device also includes a trigger rod (9), the trigger rod (9) is provided with an external thread, a ball head (9-1) is installed on the top end of the trigger rod (9), and the trigger rod (9) can pass through a second mounting hole (3-2) on the flap (3) and is fixed on the flap (3) via two adjusting nuts (10).

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