Double-semicircle opening and closing inspection well cover with latch

Abstract

The invention provides a double-semicircle opening and closing inspection well cover with a latch, which comprises a circular well cover and a well seat, and is characterized in that the well cover is formed by oppositely splicing two semicircle covers, the outer side ends of the semicircle covers are respectively hinged to the well seat, splicing connecting pieces are oppositely arranged on the dark sides of the semicircle covers, and the splicing connecting pieces are used for splicing and fixing the two semicircle covers through the latch device; the latch device comprises lock holes, a locking latch rod, an unlocking latch rod and a return spring, the splicing connecting piece is oppositely provided with aligned lock holes, the two semicircular covers are a semi-closed cover and a semi-open cover respectively, the locking latch rod is arranged on the dark side of the semi-closed cover and can be inserted into the aligned lock holes, the unlocking latch rod is arranged on the dark side of the semi-open cover, the diameter of the unlocking latch rod is larger than that of the locking latch rod, and the locking latch rod can be inserted into the return spring. The unlocking latch rod is sleeved with a return spring, the unlocking latch rod can be inserted into the aligned lock holes and completely ejects out of the locking latch rod, and the unlocking latch rod automatically ejects out of the lock holes under the action of the return spring; and lifting holes corresponding to the positions of the locking latch rod and the unlocking latch rod are respectively formed in the semicircular cover. The anti-theft lock can be prevented from being stolen and is convenient to construct.

Description

Technical Field

[0001] The invention relates to the technical field of manhole covers, and in particular to a double semicircular opening and closing manhole cover with a latch. Background Art

[0002] Manhole covers are widely used in various urban infrastructure projects and pipe network intersection construction, such as water supply, drainage, septic tank, electricity, communications, gas, heat, etc. The pipes in these projects must have an outlet to the ground, and these outlets are often closed in the form of manhole covers, which plays a very important role in providing various basic services for the city. Manhole covers are usually made of reinforced cement, metal, reinforced plastic and other materials, and are mainly round and square in shape.

[0003] However, these manhole covers are relatively heavy, and it is extremely inconvenient for operators to open and close the manhole covers during use. When a corner of the manhole cover is crushed and damaged, the entire manhole cover must be replaced, resulting in a waste of personnel and resources and reducing construction efficiency. In addition, manhole covers are easily stolen or used for other purposes during use. When the manhole cover is separated from the manhole seat, it will cause a lot of trouble and inconvenience to pedestrians and vehicles on the road, causing injuries and harm to people. In serious cases, it will also cause traffic accidents such as injuries to people and vehicles, affecting social security and traffic order.

[0004] Therefore, there is an urgent need for a manhole cover with simple structure, safety, reliability, effective anti-theft and easy construction in the market. Summary of the invention

[0005] The present invention overcomes the above-mentioned defects and aims to solve the problems of convenient construction of manhole covers and prevent theft, and provides a double semicircular opening and closing manhole cover with a latch. The present invention provides the following technical solutions:

[0006] The present invention discloses a double semicircular opening and closing manhole cover with a latch, comprising a circular manhole cover and a manhole seat, characterized in that: the manhole cover is formed by relatively splicing two semicircular covers, the outer ends of the semicircular covers are respectively hinged to the manhole seat, and the inner surfaces of the semicircular covers are relatively provided with splicing connecting pieces, and the splicing connecting pieces splice and fix the two semicircular covers through a latch device; the latch device comprises a lock hole, a locking latch rod, an unlocking latch rod and a return spring, the splicing connecting pieces are relatively provided with aligned lock holes, and the two semicircular covers are respectively hinged to the manhole seat, and the inner surfaces of the semicircular covers are relatively provided with splicing connecting pieces, and the two semicircular covers are spliced ​​and fixed by the splicing connecting pieces through a latch device; the latch device comprises a lock hole, a locking latch rod, an unlocking latch rod and a return spring, the locking holes are relatively arranged on the splicing connecting pieces, and the two semicircular covers are respectively hinged to the manhole seat ... The semicircular covers are respectively half-closed covers and half-open covers, the half-closed cover is provided with a locking latch rod on the back side, and the closing latch rod can be inserted into the aligned lock hole, and the half-open cover is provided with an unlocking latch rod on the back side, the unlocking latch rod has a diameter larger than that of the closing latch rod, and a return spring is provided on the unlocking latch rod, and the unlocking latch rod can be inserted into the aligned lock hole and completely push out the closing latch rod, and the unlocking latch rod automatically pops out of the lock hole under the action of the return spring; the semicircular covers are respectively provided with pulling holes corresponding to the positions of the closing latch rod and the unlocking latch rod.

[0007] While adopting the above-mentioned technical solutions, the present invention can also adopt or combine the following technical solutions: the dark side of the half-closed cover is provided with a limit lock buckle corresponding to the lock hole, the closing latch rod can pass through the limit lock buckle, a limit plate is sleeved on one end of the closing latch rod close to the lock hole, and the other end is bent downward at an angle of 135 degrees, and the outer diameter of the limit plate is larger than the inner diameter of the limit lock buckle.

[0008] As a preferred technical solution of the present invention, the dark side of the half-open cover is provided with two limit lock buckles corresponding to the lock holes, the unlocking latch rod can pass through the limit lock buckles, the return spring of the unlocking latch rod is located between the two limit lock buckles, one end of the return spring is fixed to the limit lock buckle close to the lock hole, and the other end is fixed to the unlocking latch rod, and the outer diameter of the return spring is larger than the inner diameter of the limit lock buckle.

[0009] As a preferred technical solution of the present invention, the unlocking latch rod is fixed to the return spring through a limiting plate, the end of the unlocking latch rod away from the lock hole is bent downward at an angle of 135 degrees, and the outer diameter of the limiting plate is larger than the inner diameter of the limiting lock buckle.

[0010] As a preferred technical solution of the present invention, the splicing connector is divided into two layers, the splicing of the upper layer is straight line splicing, and the splicing of the lower layer is bite splicing. The lower layer of the half-closed cover splicing connector is an arc-shaped bite splicing protrusion, and the lower layer of the half-open cover splicing connector is an arc-shaped bite splicing recess.

[0011] As a preferred technical solution of the present invention, any rod can move the locking latch rod and the unlocking latch rod laterally through the lifting hole, and the outer diameter of the rod is smaller than the inner diameter of the lifting hole.

[0012] As a preferred technical solution of the present invention, the positive side of the half-closed cover is affixed with a hole mark, and the positive side of the half-open cover is affixed with an opening hole mark, and the closing hole mark and the opening hole mark are respectively close to their corresponding lifting holes.

[0013] As a preferred technical solution of the present invention, the contact surface between the semicircular cover and the well seat is respectively provided with corresponding matching integrated hinges, and the semicircular cover can rotate freely on the well seat along the integrated hinges.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When the present invention is in use, when one semicircular cover of the manhole cover is damaged by being crushed, due to the opening and closing design of the double semicircular covers, the operator only needs to replace the damaged half of the manhole cover instead of replacing all of it, thus saving manufacturing costs. At the same time, the semicircular cover can be freely rotated on the manhole seat through the integrated hinge, which can effectively reduce the difficulty of opening and closing the manhole cover for the operator, thus avoiding damage to the entire manhole cover due to being moved, and facilitating the operator's inspection and maintenance, thus saving manpower and material resources and improving construction efficiency.

[0016] 2. The semicircular cover of the present invention is fixed to the recessed hidden surface of the manhole seat by a one-piece hinge, which can effectively prevent the manhole cover from being dismantled and stolen. In addition, a latch device with high mechanical strength is provided on the dark side of the manhole cover, so thieves cannot detect the device and cannot steal the manhole cover, thereby reducing the occurrence of pedestrian and vehicle accidents, improving the safety of urban traffic, and protecting personal safety and national property.

[0017] 3. The latch device designed on the negative side of the manhole cover of the present invention greatly improves the bearing capacity of the manhole cover, adding a guarantee for the splicing of the manhole cover. Moreover, the bite structure of the splicing connector also enhances the bearing capacity of the manhole cover splicing, making it difficult to be rolled over by vehicles and effectively resisting the crushing damage of overweight trucks.

[0018] In various urban infrastructure projects and various pipe network intersection constructions, the present invention has a simple structure, low manufacturing cost, safety and reliability, effectively improves practicality and operability, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a top view of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the present invention;

[0022] Figure 3 It is an enlarged schematic diagram of the structure at A of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the locking latch rod and the limiting lock buckle of the present invention;

[0024] In the figure: half-closed cover 1; half-open cover 2; integrated hinge 3; well seat 4; closing latch rod 5; unlocking latch rod 6; limiting plate 7; splicing connector 8; return spring 9; limiting lock buckle 10; lock hole 11; lifting hole 12; closing hole mark 13; opening hole mark 14. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1-2 As shown, a double semicircular opening and closing manhole cover with a latch includes a circular manhole cover and a manhole seat 4. The manhole cover is formed by two semicircular covers being relatively spliced ​​together. The outer ends of the semicircular covers and the contact surfaces with the manhole seat 4 are respectively provided with corresponding matching one-piece hinges 3. The semicircular covers can freely rotate along the one-piece hinges 3 on the recessed hidden surface of the manhole seat 4, which can effectively prevent the manhole cover from being dismantled or stolen. The negative surfaces of the semicircular covers are relatively provided with splicing connectors 8. The splicing connectors 8 generate a holding force through a latch device to splice and fix the two semicircular covers. When in use, when one of the manhole covers is crushed and damaged, the operator only needs to replace the damaged half of the manhole cover, and does not need to replace all of them, saving manufacturing costs. At the same time, the double semicircular cover opening and closing design can effectively reduce the difficulty of the operator in opening and closing the manhole cover, avoiding the damage of the entire manhole cover due to being moved, facilitating inspection and maintenance, saving manpower and material resources, and improving construction efficiency.

[0028] like Figure 3-4 As shown, the latch device includes a lock hole 11, a closing latch rod 5, an unlocking latch rod 6 and a return spring 9. The spliced ​​connecting piece 8 has aligned lock holes 11 formed therein. The two semicircular covers are respectively a half-closed cover 1 and a half-open cover 2. The negative side of the half-closed cover 1 is provided with a limit lock buckle 10 corresponding to the lock hole 11 and the closing latch rod 5 passes through the limit lock buckle 10 and is inserted into the aligned lock hole 11. The two semicircular covers can be spliced ​​together and closed. A limit plate 7 is sleeved on one end of the closing latch rod 5 close to the lock hole 11, and the other end is bent downward at an angle of 135 degrees. The outer diameter of the limit plate 7 is larger than the inner diameter of the limit lock buckle 10, which can prevent the closing latch rod 5 from falling into the limit lock buckle 10. The negative side of the half-open cover 2 is provided with an unlocking latch rod 6 and two limiting lock buckles 10 corresponding to the lock holes 11. The unlocking latch rod 6 passes through the limiting lock buckle 10 and is inserted into the aligned lock holes 11 and completely pushes out the closing latch rod 5. The diameter of the unlocking latch rod is larger than the diameter of the closing latch rod, ensuring that the force of the unlocking latch rod completely covers the top of the closing latch rod and better pushes the closing latch rod. The unlocking latch rod 6 is sleeved with a return spring 9 between two limiting lock buckles 10. One end of the return spring 9 is fixed to the limiting lock buckle 10 close to the lock hole 11, and the other end is fixed to the unlocking latch rod 6. The outer diameter of the return spring 9 is larger than the inner diameter of the limiting lock buckle 10. The unlocking latch rod 6 automatically pops out of the lock hole 11 under the action of the return spring 9. The two semicircular covers can be separated and opened. The unlocking latch rod 6 is fixed to the return spring 9 through the limiting plate 7. The end of the unlocking latch rod 6 away from the lock hole 11 is bent downward at an angle of 135 degrees. The outer diameter of the limiting plate 7 is larger than the inner diameter of the limiting lock buckle 10, which can prevent the closing latch rod 5 from falling into the limiting lock buckle 10. The semicircular covers are respectively provided with lifting holes 12 corresponding to the positions of the closing latch rod 5 and the unlocking latch rod 6. Any rod can move the closing latch rod 5 and the unlocking latch rod 6 laterally through the lifting hole 12. The outer diameter of the rod is smaller than the inner diameter of the lifting hole 12. Figure 1As shown, the positive side of the half-closed cover 1 is affixed with a hole mark 13, and the positive side of the half-opened cover 2 is affixed with an opening mark 14, and the hole mark 13 and the opening mark 14 are respectively close to the corresponding lifting holes 12. The negative side of the manhole cover is provided with a latch device with high mechanical strength, so that thieves cannot detect the device and cannot steal the manhole cover, reducing the occurrence of pedestrian and vehicle accidents, improving the safety of urban traffic, and protecting personal safety and national property losses.

[0029] like Figure 3-4 As shown, the splicing connector 8 is divided into two layers, the upper layer is spliced ​​in straight line, and the lower layer is spliced ​​in bite splicing. The lower layer of the splicing connector 8 of the half-closed cover 1 is an arc-shaped bite splicing protrusion, and the lower layer of the splicing connector 8 of the half-open cover 2 is an arc-shaped bite splicing recess. The arc-shaped bite splicing protrusions and the arc-shaped bite splicing recesses of the two semicircular covers bite each other and are staggered and spliced, which increases the contact area of ​​the splicing surfaces and enhances the bearing capacity of the manhole cover splicing. It is not easy to be overturned by vehicles and can effectively resist the crushing damage of overweight trucks.

[0030] Working principle:

[0031] When closing the manhole cover, the semicircular cover is rotated downward on the manhole seat 4 along the integrated hinge 3, and the two semicircular covers are relatively spliced ​​together. The rod is used to vertically move through the lifting hole 12 on the half-closed cover 1, triggering the closing latch rod 5 to move horizontally toward the lock hole 11. The closing latch rod 5 is inserted into the aligned lock hole 11, and the latch device generates a supporting force to lock the manhole cover splicing.

[0032] When it is necessary to open the manhole cover for inspection, a rod is used to vertically move through the lifting hole 12 on the half-open cover 2, triggering the unlocking latch rod 6 to move horizontally toward the lock hole 11, the unlocking latch rod 6 is inserted into the aligned lock hole 11 and completely pushes out the closing latch rod 5, and then the rod is pulled out. The unlocking latch rod 6 automatically pops out of the lock hole 11 under the action of the return spring 9, the two semicircular covers are unlocked, and the semicircular covers are rotated upward along the integrated hinge 3 to the manhole seat 4, and the manhole cover can be opened.

[0033] Based on the above background, a double semicircular opening and closing manhole cover with a latch is now invented. It is not limited to circular manhole covers, but can also be used for irregular shapes such as square manhole covers and triangular manhole covers. In various urban infrastructure projects and various pipe network intersection constructions, the present invention has a simple structure, low manufacturing cost, safety and reliability, effectively improves practicality and operability, and is easy to promote and use.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double semicircular opening and closing manhole cover with a latch, comprising a circular manhole cover and a manhole seat, characterized in that: The manhole cover is formed by two semicircular covers that are relatively spliced ​​together, and the outer ends of the semicircular covers are respectively hinged to the manhole seats, and the dark sides of the semicircular covers are relatively provided with splicing connecting pieces, which splice and fix the two semicircular covers through a latch device; the latch device includes a locking hole, a closing latch rod, an unlocking latch rod and a return spring, and the splicing connecting pieces are relatively provided with aligned locking holes, and the two semicircular covers are respectively a half-closed cover and a half-open cover, and the dark side of the half-closed cover is provided with a closing latch rod, and the closing latch rod can be inserted into the aligned locking hole, and the dark side of the half-open cover is provided with an unlocking latch rod, and the diameter of the unlocking latch rod is larger than that of the closing latch rod, and the unlocking latch rod is sleeved with a return spring, and the unlocking latch rod can be inserted into the aligned locking hole and completely push out the closing latch rod, and the unlocking latch rod automatically pops out of the locking hole under the action of the return spring; the semicircular covers are respectively provided with lifting holes corresponding to the positions of the closing latch rod and the unlocking latch rod.

2. A double semicircular opening and closing manhole cover with a latch according to claim 1, characterized in that: The negative surface of the half-closed cover is provided with a limit lock buckle corresponding to the lock hole, and the lock latch rod can pass through the limit lock buckle. A limit plate is sleeved on one end of the lock latch rod close to the lock hole, and the other end is bent downward at an angle of 135 degrees. The outer diameter of the limit plate is larger than the inner diameter of the limit lock buckle.

3. The double semicircular opening and closing manhole cover with a latch according to claim 1, characterized in that: The negative side of the half-open cover is provided with two limit lock buckles corresponding to the lock holes, the unlocking latch rod can pass through the limit lock buckles, the return spring of the unlocking latch rod is located between the two limit lock buckles, one end of the return spring is fixed to the limit lock buckle close to the lock hole, and the other end is fixed to the unlocking latch rod, and the outer diameter of the return spring is larger than the inner diameter of the limit lock buckle.

4. A double semicircular opening and closing manhole cover with a latch according to claim 3, characterized in that: The unlocking latch rod is fixed to the return spring through a limiting plate, and one end of the unlocking latch rod away from the lock hole is bent downward at an angle of 135 degrees, and the outer diameter of the limiting plate is larger than the inner diameter of the limiting lock buckle.

5. The double semicircular opening and closing manhole cover with a latch according to claim 1, characterized in that: The splicing connection piece is divided into two layers, the splicing of the upper layer is linear splicing, and the splicing of the lower layer is bite splicing. The lower layer of the half-closed cover splicing connection piece is an arc-shaped bite splicing protrusion, and the lower layer of the half-open cover splicing connection piece is an arc-shaped bite splicing recess.

6. A double semicircular opening and closing manhole cover with a latch according to claim 5, characterized in that: Any rod can move the locking latch rod and the unlocking latch rod laterally through the lifting hole, and the outer diameter of the rod is smaller than the inner diameter of the lifting hole.

7. The double semicircular opening and closing manhole cover with a latch according to claim 2, characterized in that: The positive side of the half-closed cover is affixed with a hole mark, and the positive side of the half-opened cover is affixed with an opening hole mark, and the closing hole mark and the opening hole mark are respectively close to the corresponding lifting holes.

8. A double semicircular opening and closing manhole cover with a latch according to any one of claims 1, characterized in that: The contact surfaces of the semicircular cover and the well seat are respectively provided with corresponding matching integrated hinges, and the semicircular cover can rotate freely on the well seat along the integrated hinges.

Images