A manhole cover lock resistant to external damage

Abstract

This utility model relates to the field of manhole cover locks, and in particular to a manhole cover lock resistant to external force damage. It includes: a base plate, a lock cylinder, a support column, a first locking rod, a second locking rod, and a connecting piece; the first end of the second locking rod is located inside the lock cylinder, and the second end of the second locking rod protrudes from the side of the lock cylinder facing the support column. The second end of the second locking rod and the first end of the first locking rod are connected by the connecting piece, and the positions of the first end of the first locking rod and the second end of the second locking rod correspond. The second end of the first locking rod passes through a through hole on the support column; wherein, the second locking rod and the first locking rod are not coaxial, and the connecting piece can deform after being subjected to external force exceeding a specified upper limit. This utility model can reduce the external force transmitted to the second locking rod in all directions, preventing damage to the lock cylinder connected to the second locking rod.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover locks, and in particular to a manhole cover lock resistant to external damage. Background Technology

[0002] Manhole cover locks are mechanical or intelligent protective devices used in manhole cover systems. They securely connect the manhole cover to the manhole base through a locking structure, achieving the functions of preventing theft, opening, and displacement of the manhole cover. They are widely used in municipal roads, communications, power, water supply and drainage and other fields.

[0003] External force damage is one of the most common causes of manhole cover lock failure, mainly manifested as repeated running over by heavy vehicles, malicious prying, and impacts from construction machinery. These external forces often act directly or indirectly on the lock rod. In existing lock structures, the lock rod usually passes directly through the lock cylinder, such as... Figure 1 As shown, when the locking bar is damaged by the external force indicated by the arrow, the external force will be directly transmitted to the lock cylinder along the locking bar, causing the lock to deform, break or loosen, which in turn causes the manhole cover lock to loosen, fall off, fail to lock properly or completely fail. This not only threatens the safety of pedestrians and vehicles, but may also expose underground facilities, increasing the risk of theft or damage, and in severe cases may even cause traffic accidents or public safety incidents.

[0004] To avoid or reduce the risk of damage to manhole cover locks from external forces, various technical methods have been developed for protection. For example, optimizing the lock's structural design by using built-in or automatic locking mechanisms reduces the risk of lock cylinder exposure; using high-strength stainless steel or composite materials improves the lock cylinder's impact and corrosion resistance; and strengthening the fit and reinforcement between the manhole cover and the base during installation ensures even stress distribution. However, these methods are still insufficient to completely eliminate the damage caused by external forces to manhole cover locks.

[0005] Therefore, how to overcome the defects of the existing technology and solve the problem of manhole cover locks being damaged by external impacts and unable to be used normally is an urgent problem to be solved in this technical field. Utility Model Content

[0006] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model solves the problem that the manhole cover lock cannot be used normally due to damage caused by external impact.

[0007] The technical solution adopted in this embodiment of the utility model is as follows: In a first aspect, this utility model provides a manhole cover lock resistant to external force damage, comprising: a base plate 1, a lock cylinder 2, a support column 3, a first locking rod 4, a second locking rod 5, and a connecting piece 6. Specifically, the lock cylinder 2 is fixed to the first end of the base plate 1, the support column 3 is fixed to the second end of the base plate 1, the first end of the second locking rod 5 is located inside the lock cylinder 2, the second end of the second locking rod 5 protrudes from the side of the lock cylinder 2 facing the support column 3, the second end of the second locking rod 5 and the first end of the first locking rod 4 are connected by the connecting piece 6, the first end of the first locking rod 4 corresponds to the second end of the second locking rod 5, and the second end of the first locking rod 4 passes through a through hole on the support column 3; wherein, the second locking rod 5 and the first locking rod 4 are not coaxial, and the connecting piece 6 can deform after being subjected to external force exceeding a specified upper limit.

[0008] Preferably, the connecting piece 6 includes a first connecting hole 61 and a second connecting hole 62, specifically: the first connecting hole 61 is adapted to the shape of the cross-section of the first locking rod 4 and is used to fix the first end of the first locking rod 4; the second connecting hole 62 is an adapting hole, the shapes of the two ends of the second connecting hole 62 are adapted to the shape of the cross-section of the second locking rod 5, the width of the waist of the second connecting hole 62 is adapted to the width of the cross-section of the second locking rod 5, the second end of the second locking rod 5 can be fixed at any position in the second connecting hole 62, and the second end of the second locking rod 5 can slide along the second connecting hole 62.

[0009] Preferably, the connecting piece 6 is made of any one of stainless steel, copper, rubber, plastic and composite materials, and the thickness of the connecting piece 6 is less than the specified upper limit of thickness.

[0010] Preferably, when the connecting piece 6 is made of stainless steel, the maximum thickness of the connecting piece 6 is 2mm.

[0011] Preferably, the support column 3 is a square closed frame structure, with the left and right sides open and the other four sides being closed walls; wherein, the front and rear sides respectively include a first through hole 31 and a second through hole 32, the shape of the first through hole 31 and the second through hole 32 is consistent with the cross-sectional shape of the first locking rod 4, the size of the first through hole 31 and the second through hole 32 is adapted to the cross-sectional size of the first locking rod 4, and the center of the first through hole 31, the center of the second through hole 32 and the axis of the first locking rod 4 are on the same straight line, so that the first locking rod 4 can pass horizontally through the first through hole 31 and the second through hole 32.

[0012] Preferably, the manhole cover lock resistant to external force damage further includes: a shim 33 between the support column 3 and the base plate 1, so as to adjust the height of the through hole on the support column 3 by changing the thickness of the shim 33; and / or, an adjusting bolt between the support column 3 and the base plate 1, so as to adjust the height of the through hole on the support column 3 by changing the height of the adjusting bolt.

[0013] Preferably, the first locking rod 4 and the second locking rod 5 are cylindrical, and the first end of the first locking rod 4 and the second end of the second locking rod 5 are respectively provided with blind holes 41 with internal threads, so that the first locking rod 4 and the second locking rod 5 can be screwed to the connecting piece 6 through the blind holes 41.

[0014] Preferably, the manhole cover lock resistant to external force damage also includes a lock cylinder box 21, with the lock cylinder 2 located inside the lock cylinder box 21. The lock cylinder box 21 and the base plate 1 form a square closed structure. The side of the lock cylinder box 21 facing the support column 3 includes a through hole so that the second end of the second locking rod 5 can pass through.

[0015] Preferably, the manhole cover lock resistant to external force damage also includes a support column cover 34. The support column 3 is located inside the support column cover 34. The support column cover 34 and the base plate 1 form a square closed structure. The side of the support column cover 34 facing the lock core 2 includes a through hole so that the second end of the second locking rod 5 can be inserted. The side of the support column cover 34 away from the lock core 2 includes a through hole so that the second end of the first locking rod 4 can be inserted.

[0016] Preferably, the anti-external force manhole cover lock further includes a controller 7, specifically including: the controller 7 includes one or more of a wireless signal transceiver 71, a data processing unit 72, and an environmental sensor 73, and the controller 7 is connected to the lock cylinder 2 via a signal line; the controller 7 is used to control the lock cylinder 2 according to the external control signal received by the wireless signal transceiver 71, and / or, the controller 7 is used to control the wireless transceiver to send an alarm signal according to the sensing result of the environmental sensor 73.

[0017] Compared with the prior art, the beneficial effects of this utility model embodiment are as follows: the first locking rod 4 and the second locking rod 5 are connected by a deformable connecting piece 6, and the first locking rod 4 is supported by a support column 3, so that the external force acting on the first locking rod 4 vertically or parallel to the axial direction is distributed to the support column 3 and the connecting piece 6; at the same time, the first locking rod 4 can rotate in the through hole of the support column 3, so that the axial torque acting on the first locking rod 4 is distributed to the connecting piece 6; therefore, the external force transmitted to the second locking rod 5 in various directions can be reduced, and damage to the lock cylinder 2 connected to the second locking rod 5 can be avoided. Furthermore, the distance between the first locking rod 4 and the base plate 1 can be adjusted by the adapter hole on the connecting piece 6 and the shim 33 or adjusting bolt below the support column 3 to adapt to the installation needs of different manhole covers. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the manhole cover lock structure used in existing technology; Figure 2 This is a schematic diagram of a manhole cover lock structure resistant to external force damage provided by an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the bottom plate 1 of the manhole cover lock resistant to external force damage provided in this embodiment of the utility model; Figure 4 This is a schematic diagram illustrating the installation and use of the manhole cover lock resistant to external force damage provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the locked state of the manhole cover lock resistant to external force provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the unlocking state of the manhole cover lock resistant to external force provided in this embodiment of the utility model; Figure 7 This is a schematic diagram of the structure of the connecting piece 6 in the manhole cover lock that resists external force damage provided in this embodiment of the utility model; Figure 8 This is a schematic diagram of the structure of the support column 3 in the manhole cover lock that resists external force damage, provided in this embodiment of the utility model; Figure 9 This is a schematic diagram showing the stress on each component of the manhole cover lock resistant to external force when subjected to external force, as provided in this embodiment of the utility model. Figure 10 This is a schematic diagram showing the connection relationship between the first locking rod 4 and the second locking rod 5 of the anti-external force manhole cover lock and the connecting piece 6 provided in this embodiment of the utility model; Figure 11 This is a schematic diagram showing the position of the gasket 33 in the manhole cover lock that resists external force damage, provided in this embodiment of the utility model. Figure 12 This is a schematic diagram of the structure of the lock core box 21 and the support column cover 34 in the manhole cover lock resistant to external force damage provided in this embodiment of the utility model; Figure 13 This is a schematic diagram of the structure of the controller 7 in the manhole cover lock that resists external force damage provided in this embodiment of the utility model; Figure 14 This is a schematic diagram of the structure of the controller box 74 in the manhole cover lock that resists external force damage, provided in this embodiment of the utility model; The accompanying figure is labeled as follows: 1: Base plate, 11: Screw holes 2: Lock cylinder; 21: Lock cylinder housing; 3: Support column; 31: First through hole; 32: Second through hole; 33: Gasket; 34: Support column cover. 4: First locking rod; 41: Blind hole; 42: Screw. 5: Second locking bar, 6: Connecting piece; 61: First connecting hole; 62: Second connecting hole. 7: Controller; 71: Wireless signal transceiver; 72: Data processing unit; 73: Environmental sensor; 74: Controller housing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] This utility model is an architecture of a specific functional system. Therefore, the specific embodiments mainly describe the functional logic relationship of each structural module, and do not limit the specific software and hardware implementation methods.

[0022] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Example 1: In practical applications of manhole cover locks, compared to slowly accumulating failures such as corrosion, aging, and design defects, damage from external forces is characterized by its suddenness and destructiveness, making it the most critical issue to prevent during the daily operation of manhole cover locks. This invention designs a novel manhole cover lock structure resistant to external force damage, aiming to prevent damage to the lock cylinder when the lock rod is subjected to vertical external forces.

[0024] The following is combined with Figure 2 This invention describes the specific structure of the manhole cover lock that resists external force damage provided by this utility model.

[0025] The manhole cover lock resistant to external force damage provided in this embodiment includes: a base plate 1, a lock cylinder 2, a support column 3, a first locking rod 4, a second locking rod 5, and a connecting piece 6.

[0026] The lock cylinder 2 is fixed to the first end of the base plate 1, and the support column 3 is fixed to the second end of the base plate 1. In actual implementation, the fixing method is determined according to actual needs. Sufficient strength must be ensured during fixing to achieve the desired locking effect on the manhole cover. In a specific scenario, such as... Figure 3 As shown, multiple sets of screw holes 11 are provided on the base plate 1 at positions corresponding to the lock cylinder 2 and the support column 3. The lock cylinder 2 and the support column 3 are fixed to the base plate 1 using screws or bolts. In actual implementation, the processing parameters such as the position, number, and size of the screw holes 11 are determined according to actual needs. Figure 4As shown, when using the manhole cover lock provided in this embodiment, the lock cylinder 2, support column 3 and other components can be easily fixed to the bottom of the inspection manhole cover by the base plate 1, thereby maintaining the stability of the overall structure of the manhole cover lock and facilitating the disassembly and assembly of the manhole cover lock.

[0027] The first end of the second locking rod 5 is located inside the lock cylinder 2, and the second end of the second locking rod 5 protrudes from the side of the lock cylinder 2 facing the support post 3. The second end of the second locking rod 5 and the first end of the first locking rod 4 are connected by a connecting piece 6. The first end of the first locking rod 4 corresponds to the second end of the second locking rod 5, and the second end of the first locking rod 4 passes through a through hole on the support post 3. When locked, as... Figure 5 As shown, the second locking rod 5 extends from inside the lock cylinder 2 and, through the connecting piece 6, drives the first locking rod 4 to move towards the support post 3 until the first locking rod 4 reaches the locked position. During unlocking, as... Figure 6 As shown, the second locking rod 5 retracts into the lock cylinder 2, and through the connecting piece 6, it drives the first locking rod 4 to move towards the lock cylinder 2 until unlocking is completed. Figure 5 and Figure 6 In the diagram, the arrows indicate the direction of movement of the locking lever and connecting plate in the corresponding states.

[0028] Unlike the integrated locking rod used in the prior art, the manhole cover lock provided in this embodiment consists of a two-section locking rod structure composed of a first locking rod 4 and a second locking rod 5. The second locking rod 5 and the first locking rod 4 are not coaxial, and the connecting piece 6 can deform after being subjected to external force exceeding a specified upper limit. In actual implementation, the manhole cover lock structure provided in this embodiment is equivalent to the first locking rod 4 and the second locking rod 5 being movably connected. When the manhole cover lock is in the locked state, if the manhole cover moves vertically upward or downward, it will transmit a force in the same direction to the first locking rod 4. Since the second locking rod 5 extends a short distance from the lock core 2, the connecting piece 6 is mainly affected by the vertically upward or downward force transmitted by the first locking rod 4. After being subjected to force, the connecting piece 6 will bend or undergo other deformation with the corresponding position of the second end of the second locking rod 5 as the fulcrum. At this time, the through hole of the support column 3 will also be subjected to the upward or downward force transmitted by the first locking rod 4, while the force on the first locking rod 4 can only cause a small deformation of the support column 3. Therefore, when the first locking rod 4 is subjected to external force, the external force is offset by the deformation of the connecting piece 6 and by the supporting force generated by the slight deformation of the support column 3. The external force will not be transmitted to the second locking rod 5, or only a small amount of external force will be transmitted to the second locking rod 5, thereby preventing the lock cylinder 2 connected to the second locking rod 5 from being damaged by external force.

[0029] In actual implementation, due to the different structures of manhole covers and manhole walls in different usage scenarios, the required distance between the locking rod and the base plate 1 also varies when locking. To facilitate adjustment of the distance between the locking rod and the base plate 1, the manhole cover lock provided in this embodiment includes a first connecting hole 61 and a second connecting hole 62 on the connecting piece 6. The first connecting hole 61 is adapted to the shape of the cross-section of the first locking rod 4 and is used to fix the first end of the first locking rod 4. The second connecting hole 62 is an adapting hole; the shapes of both ends of the second connecting hole 62 are adapted to the shape of the cross-section of the second locking rod 5, and the width of the waist of the second connecting hole 62 is adapted to the width of the cross-section of the second locking rod 5. The second end of the second locking rod 5 can be fixed at any position in the second connecting hole 62, and the second end of the second locking rod 5 can slide along the second connecting hole 62. In a specific scenario, both the first locking rod 4 and the second locking rod 5 are cylinders, and the shape of the connecting piece 6 is as follows: Figure 7 As shown, the first connecting hole 61 is a round hole used to fasten the connecting piece 6 to the first locking rod 4; the second connecting hole 62 is a rounded rectangular hole used to movably connect the connecting piece 6 to the second locking rod 5. During the installation of the manhole cover lock, the movement of the connecting piece 6 changes the angle between the plane containing the axes of the first locking rod 4 and the second locking rod 5 and the horizontal plane, allowing the second locking rod 5 to change its height in the direction perpendicular to the base plate 1. This makes the manhole cover lock compatible with different manhole cover installation environments. Simultaneously, when the first locking rod 4 is subjected to an external force perpendicular to the axial direction, the connecting piece 6 can move within the range of the rounded rectangular hole, further reducing the external force transmitted to the second locking rod 5.

[0030] In practice, manhole covers typically operate in humid or dusty environments, therefore the connecting piece 6 needs to be made of a material that prevents corrosion. Simultaneously, the connecting piece 6 also needs to possess a certain degree of rigidity and flexibility to ensure that the first locking rod 4 and the second locking rod 5 move synchronously during locking and unlocking, and to deform under significant external forces. In typical implementation scenarios, the connecting piece 6 is made of any one of stainless steel, copper, rubber, plastic, or composite materials, and its thickness is less than the specified upper limit. In typical scenarios, when the connecting piece 6 is made of stainless steel, to ensure that it can deform under common external forces, theoretical and experimental verification has shown that the upper limit of its thickness is 2mm.

[0031] In actual implementation, if the support column 3 has only one fulcrum, some of the external force on the first locking rod 4 may still be transmitted to the connecting piece 6. If the external force is too large, it may still damage the lock cylinder 2. In a specific implementation scenario, such as... Figure 8As shown, the support column 3 is a square closed frame structure. The left and right sides of the square closed frame structure are open, while the other four sides are closed walls. The front and rear sides each contain a first through hole 31 and a second through hole 32. The shapes of the first through holes 31 and 32 are consistent with the cross-sectional shape of the first locking rod 4. The sizes of the first through holes 31 and 32 are adapted to the cross-sectional size of the first locking rod 4. The centers of the first through holes 31, the second through holes 32, and the axis of the first locking rod 4 are on the same straight line, so that the first locking rod 4 can pass horizontally through the first through holes 31 and 32. In actual use, such as... Figure 9 As shown, the first locking rod 4 passes through the first through hole 31 and the second through hole 32. The front and rear sides of the support column 3 are used to jointly support the first locking rod 4, especially to support the vertical load of the first locking rod 4. Figure 9 In the diagram, the arrows indicate the direction of force applied to each component.

[0032] In practice, the cross-sectional shapes of the first locking rod 4 and the second locking rod 5 can be determined according to actual needs, and the cross-sectional shapes can be circular, polygonal, or serrated, etc. When the first locking rod 4 is subjected to a torsional force (torque) generated by the radial rotation of the shaft, the first locking rod 4 will rotate in the through hole of the support column 3, causing the connecting piece 6 to displace or deform, thereby eliminating the external force. To facilitate the rotation of the first locking rod 4 in the through hole, the first locking rod 4 preferably uses a circular cross-section. For ease of processing and installation, the second locking rod 5 can also use a circular cross-section. In a certain practical scenario, such as... Figure 10 As shown, the first locking rod 4 and the second locking rod 5 are cylindrical. The first end of the first locking rod 4 and the second end of the second locking rod 5 are respectively provided with blind holes 41 with internal threads, so that the first locking rod 4 and the second locking rod 5 can be screwed to the connecting piece 6 through the blind holes 41. In this scenario, taking the use of a screw 42 for screwing as an example, the screw 42 passes through the first connecting hole 61 of the connecting piece 6 and is screwed into the blind hole 41 at the first end of the first locking rod 4. The first locking rod 4 can rotate in the first connecting hole 61. When the first locking rod 4 is subjected to torsional force, the torsional force will not be transmitted to the second locking rod 5 or is minimally transmitted through the connecting piece 6. The screw 42 passes through the second connecting hole 62 of the connecting piece 6 and is screwed into the blind hole 41 at the second end of the second locking rod 5, so as to achieve a movable connection between the second locking rod 5 and the connecting piece 6, allowing the connecting piece 6 to move within the range of the second connecting hole 62.

[0033] In actual implementation, the specific structure and dimensions of the above components can be determined according to actual needs, provided there is no conflict. The following provides a set of structures and dimensions for a specific scenario. It should be understood that these structures and dimensions are merely implementation examples for a specific scenario and not limitations on the scope of protection. In this scenario, the first locking rod 4 and the second locking rod 5 are cylinders with a cross-sectional diameter of 10mm. A blind hole 41 is provided in the center of the circular surface at one end of the cylinder. The tapping of the blind hole 41 is M4, and the depth of the blind hole 41 is 10mm. The connecting piece 6 is a rounded rectangular piece made of metal and 2mm thick. The first connecting hole 61 is a circular hole with a diameter of 4.99mm. The second connecting hole 62 is a rounded rectangular hole with a length of 13mm and a width of 6.02mm. The first connecting hole 61 is used to screw the connecting piece 6 to the first locking rod 4 using the screw 42. The second connecting hole 62 is used to screw the connecting piece 6 to the second locking rod 5 using the screw 42. The connecting piece 6 can move within the range of the second connecting hole 62 to change the angle between the line connecting the centers of the first connecting hole 61 and the second connecting hole 62 and the horizontal line. The support column 3 is a square closed frame structure, with open left and right sides and closed walls on the other four sides. The through holes on the support column 3 are round holes. The first locking rod 4 passes through two through holes. The front and rear sides of the support column 3 are used to jointly support the first locking rod 4, especially to support the vertical load of the first locking rod 4.

[0034] After adjusting the distance between the first locking rod 4 and the base plate 1 using the connecting piece 6, multiple support columns 3 of different specifications can be used to match the position of the first locking rod 4 with the position of the through hole on the support column 3. Each specification of support column 3 has a different through hole position to accommodate different positions of the first locking rod 4. In actual implementation, other components can be added to facilitate adjusting the height of the through hole on the support column 3. For example... Figure 11 As shown, in one practical scenario, a shim 33 is also included between the support column 3 and the base plate 1, so that the height of the through hole on the support column 3 can be adjusted by changing the thickness of the shim 33; in another scenario, an adjusting bolt is also included between the support column 3 and the base plate 1, so that the height of the through hole on the support column 3 can be adjusted by changing the height of the adjusting bolt. Through the above methods, the height of the through hole on the support column 3 can be easily adjusted, allowing the manhole cover lock to be quickly installed and used in different application scenarios.

[0035] In practical applications, manhole cover locks are often exposed to large amounts of sewage, mud, or dust, which may affect their use or damage their structure. Therefore, a housing or cover can be used to shield the components inside the lock. To prevent sewage or debris from entering the lock cylinder 2, such as... Figure 12As shown in the top view, the anti-external force manhole cover lock also includes a lock cylinder housing 21, with the lock cylinder 2 located inside the lock cylinder housing 21. The lock cylinder housing 21 and the base plate 1 form a square closed structure. The side of the lock cylinder housing 21 facing the support column 3 includes a through hole to allow the second end of the second locking rod 5 to pass through. To prevent debris from clogging or jamming the through hole on the support column 3, such as... Figure 12 As shown in the top view, the manhole cover lock resistant to external force damage also includes a support column cover 34. The support column 3 is located inside the support column cover 34. The support column cover 34 and the base plate 1 form a square closed structure. The side of the support column cover 34 facing the lock cylinder 2 includes a through hole to allow the second end of the second locking rod 5 to pass through. The side of the support column cover 34 away from the lock cylinder 2 includes a through hole to allow the second end of the first locking rod 4 to pass through. In actual implementation, the lock cylinder box 21 and the support column cover 34 are set to match the size, and the adjacent surfaces are tightly fitted or connected, so that the exterior of the manhole cover lock forms a complete cuboid structure, which facilitates the installation and transportation of the manhole cover lock.

[0036] In practice, it is also necessary to monitor the external forces or other environmental factors affecting the manhole cover lock, and to provide remote locking and unlocking measures to prevent the manhole cover lock from malfunctioning due to external damage or other possible reasons. To achieve monitoring and remote control, such as... Figure 13 As shown, the manhole cover lock resistant to external force damage provided in this embodiment also includes a controller 7. The controller 7 includes one or more of a wireless signal transceiver 71, a data processing unit 72, and an environmental sensor 73. The controller 7 is connected to the lock cylinder 2 via a signal line. The controller 7 is used to control the lock cylinder 2 according to the external control signal received by the wireless signal transceiver 71, thereby completing remote locking and unlocking. The controller 7 is used to control the wireless transceiver to send an alarm signal according to the sensing result of the environmental sensor 73. To prevent the electronic components inside the controller 7 from being contaminated by sewage or mud, a controller housing 74 can also be used to protect the components inside the controller, such as... Figure 14 As shown in the top view, the controller housing 74 and the base plate 1 form a square closed structure. The wireless signal transceiver unit 71, the data processing unit 72, and the environmental sensor unit 73 are located inside the controller housing 74. Through the controller 7, the usage status of the manhole cover lock can be promptly reported to the user, allowing the user to take timely action when the manhole cover lock malfunctions.

[0037] In the specific application scenarios of this embodiment, components can be added or improved based on the external force-resistant manhole cover lock provided in this embodiment to further enhance the safety, ease of use and versatility of the external force-resistant manhole cover lock.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lock for an anti- vandalism manhole cover, characterized in that, include: The base plate (1), lock cylinder (2), support column (3), first lock rod (4), second lock rod (5), and connecting piece (6) specifically include: The lock cylinder (2) is fixed at the first end of the base plate (1), the support column (3) is fixed at the second end of the base plate (1), the first end of the second lock rod (5) is located inside the lock cylinder (2), the second end of the second lock rod (5) protrudes from the side of the lock cylinder (2) facing the support column (3), the second end of the second lock rod (5) and the first end of the first lock rod (4) are connected by a connecting piece (6), the first end of the first lock rod (4) corresponds to the second end of the second lock rod (5), and the second end of the first lock rod (4) passes through the through hole on the support column (3); Among them, the second locking rod (5) and the first locking rod (4) are not on the same axis, and the connecting piece (6) can deform after being subjected to external force exceeding the specified upper limit.

2. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein The connecting piece (6) includes a first connecting hole (61) and a second connecting hole (62), specifically including: The first connecting hole (61) is adapted to the shape of the cross-section of the first locking rod (4) and is used to fix the first end of the first locking rod (4); The second connecting hole (62) is an adapter hole. The shape of the two ends of the second connecting hole (62) is adapted to the shape of the cross section of the second locking rod (5). The width of the waist of the second connecting hole (62) is adapted to the width of the cross section of the second locking rod (5). The second end of the second locking rod (5) can be fixed at any position in the second connecting hole (62), and the second end of the second locking rod (5) can slide along the second connecting hole (62).

3. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein The connecting piece (6) is made of any one of stainless steel, copper, rubber, plastic and composite materials, and the thickness of the connecting piece (6) is less than the specified upper limit of thickness.

4. The anti-impact vandalism-resistant manhole cover lock according to claim 3, wherein, When the material of the connecting piece (6) is stainless steel, the maximum thickness of the connecting piece (6) is 2mm.

5. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein The support column (3) is a square closed frame structure, with the left and right sides of the square closed frame structure open and the other four sides being closed walls; The front and rear sides each contain a first through hole (31) and a second through hole (32). The shapes of the first through hole (31) and the second through hole (32) are consistent with the cross-sectional shape of the first locking rod (4). The sizes of the first through hole (31) and the second through hole (32) are adapted to the cross-sectional size of the first locking rod (4). The center of the first through hole (31), the center of the second through hole (32) and the axis of the first locking rod (4) are on the same straight line so that the first locking rod (4) can pass horizontally through the first through hole (31) and the second through hole (32).

6. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein The external force-resistant manhole cover lock also includes: A gasket (33) is also included between the support column (3) and the base plate (1) so that the height of the through hole on the support column (3) can be adjusted by changing the thickness of the gasket (33); And / or, an adjusting bolt is also included between the support column (3) and the base plate (1) so as to adjust the height of the through hole on the support column (3) by changing the height of the adjusting bolt.

7. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein The first locking rod (4) and the second locking rod (5) are cylindrical. The first end of the first locking rod (4) and the second end of the second locking rod (5) are respectively provided with blind holes (41) with internal threads so that the first locking rod (4) and the second locking rod (5) can be screwed to the connecting piece (6) through the blind holes (41).

8. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein, The anti-external force manhole cover lock also includes a lock cylinder box (21), with the lock cylinder (2) located inside the lock cylinder box (21). The lock cylinder box (21) and the base plate (1) form a square closed structure. The side of the lock cylinder box (21) facing the support column (3) contains a through hole so that the second end of the second lock rod (5) can pass through.

9. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein, The anti-external force manhole cover lock also includes a support column cover (34). The support column (3) is located inside the support column cover (34). The support column cover (34) and the base plate (1) form a square closed structure. The side of the support column cover (34) facing the lock core (2) contains a through hole so that the second end of the second locking rod (5) can be inserted. The side of the support column cover (34) away from the lock core (2) contains a through hole so that the second end of the first locking rod (4) can be inserted.

10. The anti-impact vandalism-proof manhole cover lock according to claim 1, wherein, The anti-external force manhole cover lock also includes a controller (7), specifically including: The controller (7) includes one or more of a wireless signal transceiver unit (71), a data processing unit (72), and an environmental sensor unit (73), and the controller (7) is connected to the lock cylinder (2) via a signal line; The controller (7) is used to control the lock cylinder (2) according to the external control signal received by the wireless signal transceiver (71), and / or, the controller (7) is used to control the wireless transceiver to send an alarm signal according to the sensing result of the environmental sensor (73).

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