A movement detection unit for manhole cover

Abstract

The present invention discloses an abnormal movement detection unit for a manhole cover, comprising a housing, a micro switch arranged in the housing, a first spring and a force transmission component; the lower end of the force transmission component is arranged corresponding to the trigger head of the micro switch, and the upper end of the force transmission component is connected to the lower end of the first spring; the first spring extends out of the housing, and the upper end of the first spring is used to abut against the lower side of the manhole cover. The abnormal movement detection unit can be applied to different manhole covers and different scenes, and has a simple structure, stable operation and long service life.

Description

Technical Field

[0001] The present invention relates to an abnormal movement detection unit, in particular to an abnormal movement detection unit for a manhole cover. Background Art

[0002] At present, in order to keep the urban environment clean and beautiful, various cables should not be laid with traditional exposed external connectors. However, due to the increasing dependence of people on communications, electricity, etc., higher requirements are also put forward for related infrastructure. Therefore, using the pipelines of the underground drainage system for telecommunication laying has become an economical means. It can be seen that the management of pipelines is one of the current focuses in the field of urban security. The main problems caused by pipelines are: first, pipeline resources are illegally occupied, and the cables and facilities in the pipelines are often stolen and damaged; second, the manhole covers are stolen or removed without being discovered in time, resulting in people and vehicles falling into the wells, causing casualties, etc. Traditional manhole cover management usually adopts manual inspection, but this method requires a lot of manpower and material resources, and is inefficient, and it is difficult to meet the management of massive manhole covers in the city. With the development of information technology, replacing manual inspections with automated devices has become a development trend. Summary of the invention

[0003] The purpose of the present invention is to provide a movement detection unit for a manhole cover. By using the movement detection unit, the state of the manhole cover can be sent as a signal feedback to a monitoring platform. The movement detection unit has a simple structure, stable operation, is suitable for different manhole covers or scenarios, and has a long service life.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a movement detection unit for a manhole cover, comprising a housing, a micro switch arranged in the housing, a first spring and a force transmission component; the lower end of the force transmission component is arranged corresponding to the trigger head of the micro switch, and the upper end of the force transmission component is connected to the lower end of the first spring; the first spring extends out of the housing, and the upper end of the first spring is used to abut against the lower side of the manhole cover;

[0005] The force transmission assembly comprises a spring seat and a mechanical pressure rod which are separately arranged, wherein the spring seat has a protrusion for the lower end of the first spring to pass through, and the upper part of the mechanical pressure rod is connected to the lower part of the spring seat;

[0006] The mechanical pressure rod comprises a horizontal portion extending in a horizontal direction and connected to a lower portion of the spring seat, and a vertical portion extending in a vertical direction, and the abnormal movement detection unit for the manhole cover comprises a second spring, the upper end of the second spring is connected to a lower end of the horizontal portion, and the lower end of the second spring is connected to the housing;

[0007] A limiting seat with a limiting groove is arranged in the shell, and the mechanical pressure rod is arranged in the limiting groove of the limiting seat, and the limiting groove extends in the vertical direction.

[0008] In the above technical solution, the first spring outer sleeve is provided with a spring rubber sleeve, and the spring rubber sleeve is fixed on the housing through a positioning ring.

[0009] In the above technical solution, the shell is provided with a first step and a first threaded portion, the positioning ring is provided with a flange that is locked with the first step, the lower part of the spring rubber sleeve extends horizontally to form a fixing portion, and the fixing portion is arranged between the first step and the flange. The positioning ring is arranged on the outside of the shell through the first threaded portion and enables the flange to lock the first step.

[0010] In the above technical solution, the shell is provided with an opening, the opening is opposite to the limiting groove, and the first spring extends out of the shell through the opening.

[0011] In the above technical solution, the spring rubber sleeve forms a convex body extending outward at the end abutting against the lower side of the manhole cover, and the contact surface between the convex body and the manhole cover is larger than the diameter of the first spring.

[0012] In the above technical solution, the abnormal movement detection unit includes a control device, and the control device is used to generate an alarm signal after receiving the electrical signal of the micro switch.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0014] 1. In the present invention, a micro switch, a first spring and a force transmission component are arranged in a shell, the lower end of the force transmission component is arranged corresponding to the trigger head of the micro switch, the upper end of the force transmission component is connected to the lower end of the first spring, the first spring extends out of the shell, and the upper end of the first spring is used to abut against the lower side of the manhole cover. The first spring is used to replace the traditional pressure rod form or the inclination sensor form, so that the abnormal movement detection unit can be applied to a variety of different manhole covers, and will not be restricted by the manhole cover opening method and the pressure direction. The elastic force of the first spring can protect the equipment when the manhole cover is subjected to a force of uncertain direction. At the same time, the spring can also realize the function of transmitting force and realize the triggering of the micro switch.

[0015] 2. The force transmission component includes a spring seat and a mechanical pressure rod which are separately arranged, with a simple structure and easy installation. A second spring is sleeved on the mechanical pressure rod, the upper end of the second spring is connected to the lower end of the horizontal part, and the lower end of the second spring is connected to the shell. The second spring is arranged so that when the manhole cover is accidentally touched and the manhole cover is quickly reset, the second spring provides an upward resetting force to the force transmission component, thereby resetting the micro switch.

[0016] 3. A limit seat with a limit groove is provided in the shell, and the mechanical pressure rod is arranged in the limit groove of the limit seat. The limit groove extends in the vertical direction, and the limit groove is arranged opposite to the opening on the shell, so that the mechanical pressure rod moves in the shell in a preset direction to prevent the mechanical pressure rod from tilting during the movement and getting stuck in the shell and unable to continue moving.

[0017] 4. The first spring outer sleeve is provided with a spring rubber sleeve, which is fixed to the housing through a positioning ring. The spring rubber sleeve can play a role of dustproof and waterproof, and protect the internal structure of the abnormal movement detection unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the abnormal movement detection unit of the present invention.

[0019] Among them: 1. housing; 2. micro switch; 3. first spring; 4. raised portion; 5. horizontal portion; 6. vertical portion; 7. second spring; 8. limit seat; 9. spring rubber sleeve; 10. positioning ring; 11. opening; 12. convex body. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0021] Example 1: See Figure 1 As shown, a movement detection unit for a manhole cover comprises a shell 1, a micro switch 2 arranged in the shell 1, a first spring 3 and a force transmission component; the lower end of the force transmission component is arranged corresponding to the trigger head of the micro switch 2, and the upper end of the force transmission component is connected to the lower end of the first spring 3; the first spring 3 extends out of the shell 1, and the upper end of the first spring 3 is used to abut against the lower side of the manhole cover, so as to withstand the force generated by the tilt of the manhole cover, and the force transmission component is arranged between the first spring 3 and the micro switch 2, so that the force transmission component can move toward or away from the micro switch 2 in the shell 1 under the action of the first spring 3, thereby controlling the opening and closing of the micro switch 2.

[0022] In order to facilitate the production and installation of the force transmission component, the force transmission component includes a spring seat and a mechanical pressure rod which are separately arranged, the spring seat has a protrusion 4 for the lower end of the first spring 3 to pass through, and the upper part of the mechanical pressure rod is connected to the lower part of the spring seat;

[0023] The mechanical pressure rod has a horizontal portion 5 extending in the horizontal direction and connected to the lower portion of the spring seat, and a vertical portion 6 extending in the vertical direction. The abnormal movement detection unit for the manhole cover includes a second spring 7, the upper end of the second spring 7 is connected to the lower end of the horizontal portion 5, and the lower end of the second spring 7 is connected to the housing 1. By arranging the second spring 7, the force transmission component in the abnormal movement detection unit can be quickly reset after the force on the manhole cover is removed.

[0024] During the movement of the mechanical pressure rod in the housing 1, due to the uncertainty of the force direction, the mechanical pressure rod may tilt and get stuck in the housing 1 and cannot be used any more. Therefore, in order to avoid the above situation, a limit seat 8 with a limit groove is provided in the housing 1, and the mechanical pressure rod is provided in the limit groove of the limit seat 8, and the limit groove extends in the vertical direction. An opening 11 is provided on the housing 1, and the opening 11 is opposite to the limit groove, and the first spring 3 extends out of the housing 1 through the opening 11.

[0025] See also Figure 1 As shown, a spring rubber sleeve 9 is provided on the outer sleeve of the first spring 3, and the spring rubber sleeve 9 is fixed to the housing 1 through a positioning ring 10. The spring rubber sleeve 9 can play a role in dustproof and waterproof, and protect the internal structure of the abnormal movement detection unit. The housing 1 is provided with a first step and a first threaded portion, and the positioning ring 10 is provided with a flange that is buckled with the first step. The lower part of the spring rubber sleeve 9 extends horizontally to form a fixing portion, and the fixing portion is arranged between the first step and the flange. The positioning ring 10 is arranged on the outside of the housing 1 through the first threaded portion and makes the flange buckle the first step. The connection structure is simple, and fixing the spring rubber sleeve 9 is convenient and effective.

[0026] See also Figure 1 As shown, the spring rubber sleeve 9 forms a convex body 12 extending outward at the end abutting against the lower side of the manhole cover, and the contact surface between the convex body 12 and the manhole cover is larger than the diameter of the first spring 3, thereby increasing its force-bearing area.

[0027] In order to enable the monitoring platform to obtain the status of the manhole cover in the first time, the abnormal movement detection unit includes a control device, which is used to generate an alarm signal after receiving the electrical signal of the micro switch 2.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A movement detection unit for a manhole cover, characterized in that: The utility model comprises a housing, a micro switch arranged in the housing, a first spring and a force transmission component; the lower end of the force transmission component is arranged corresponding to the trigger head of the micro switch, and the upper end of the force transmission component is connected to the lower end of the first spring; the first spring extends out of the housing, and the upper end of the first spring is used to abut against the lower side of the manhole cover; The force transmission assembly comprises a spring seat and a mechanical pressure rod which are separately arranged, wherein the spring seat has a protrusion for the lower end of the first spring to pass through, and the upper part of the mechanical pressure rod is connected to the lower part of the spring seat; The mechanical pressure rod comprises a horizontal portion extending in a horizontal direction and connected to a lower portion of the spring seat, and a vertical portion extending in a vertical direction, and the abnormal movement detection unit for the manhole cover comprises a second spring, the upper end of the second spring is connected to a lower end of the horizontal portion, and the lower end of the second spring is connected to the housing; A limiting seat with a limiting groove is arranged in the shell, and the mechanical pressure rod is arranged in the limiting groove of the limiting seat, and the limiting groove extends in the vertical direction.

2. The abnormal movement detection unit for a manhole cover according to claim 1, characterized in that: The first spring outer sleeve is provided with a spring rubber sleeve, and the spring rubber sleeve is fixed on the housing through a positioning ring.

3. The abnormal movement detection unit for a manhole cover according to claim 2, characterized in that: The shell is provided with a first step and a first threaded portion, the positioning ring is provided with a flange that is locked with the first step, the lower part of the spring rubber sleeve extends horizontally to form a fixing portion, and the fixing portion is arranged between the first step and the flange. The positioning ring is arranged on the outer side of the shell through the first threaded portion and enables the flange to lock the first step.

4. The abnormal movement detection unit for a manhole cover according to claim 1, characterized in that: The shell is provided with an opening, the opening is opposite to the limiting groove, and the first spring extends out of the shell from the opening.

5. The abnormal movement detection unit for a manhole cover according to claim 2, characterized in that: The abutting end of the spring rubber sleeve and the lower side of the manhole cover forms a convex body extending outward, and the contact surface between the convex body and the manhole cover is larger than the diameter of the first spring.

6. The abnormal movement detection unit for a manhole cover according to claim 1, characterized in that: The abnormal movement detection unit includes a control device, and the control device is used to generate an alarm signal after receiving the electrical signal of the micro switch.

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