Nodular cast iron well lid

Abstract

The utility model discloses a nodular cast iron well lid which comprises a well base, a well lid plate, a locking structure, a flow adjusting structure and an unlocking adjusting key. According to the nodular cast iron well lid, the blocking degree of the flow adjusting structure to the drainage holes is adjusted through the unlocking adjusting key, the drainage amount of the drainage holes can be adjusted according to requirements, and the fan-ring-shaped drainage holes are not prone to being blocked; the well lid plate can be locked on the well base through the locking structure, the safety is improved, the locking structure can be unlocked through the unlocking adjusting key, and the interior of the well lid can be conveniently maintained; the unlocking adjusting key can be used for driving the flow adjusting structure and the locking structure, and the tool is simplified; the structural strength of the well lid can be improved through the reinforcing ribs, and deformation is reduced.

Description

Technical Field

[0001] This utility model relates to a manhole cover, and more particularly to a ductile iron manhole cover. Background Technology

[0002] The primary function of manhole covers is to cover roads and prevent people or objects from falling in. In urban road administration, round manhole covers are less prone to tilting and can better protect the safety of pedestrians and vehicles. However, traditional round manhole covers generally do not have drainage outlets on their surface. During heavy rain, a large amount of rainwater accumulates on the road surface, affecting the passage of vehicles and pedestrians. Square manhole covers, on the other hand, have poor sealing of drainage outlets, allowing debris to easily fall into the sewer and causing odors. Existing manhole covers with fast drainage functions, such as the utility model with application number CN202223092433.3, can solve the above problems, but the drainage holes are still prone to clogging. Therefore, a ductile iron manhole cover is proposed. Utility Model Content

[0003] Purpose of the utility model: To provide a ductile iron manhole cover that can drain water quickly and is not easily clogged.

[0004] Technical Solution: The ductile iron manhole cover provided by this utility model includes a manhole base, a manhole cover plate, a locking structure, a flow regulating structure, and an unlocking and adjusting key. The manhole cover plate is hingedly installed on the manhole base to cover the upper manhole opening. An adjusting hole for the unlocking and adjusting key to be inserted is provided in the center of the manhole cover plate. A positioning tube is installed in connection with the adjusting hole. A reinforcing rib is fixedly connected to the positioning tube and the manhole cover plate. Multiple drainage holes are provided on the manhole cover plate. The locking structure and the flow regulating structure are both installed on the positioning tube. The locking structure is used to lock the manhole cover plate to the manhole base. The flow regulating structure is used to block each drainage hole. The unlocking and adjusting key is used to adjust the degree of blockage of each drainage hole by the flow regulating structure and to unlock the locking structure.

[0005] Furthermore, it also includes a filter screen; the filter screen is installed on the lower side inside the well base via hooks.

[0006] Furthermore, several anti-slip protrusions are provided on the upper side of the manhole cover.

[0007] Furthermore, a center cover is placed over the upper opening of the adjustment hole.

[0008] Furthermore, the flow regulation structure includes a regulating pipe and multiple regulating units; each regulating unit includes a baffle plate and an arc-shaped guide rail; the regulating pipe is rotatably mounted on the positioning pipe; the arc-shaped guide rail is mounted on the manhole cover plate; the baffle plate is mounted on the positioning pipe via a vertical plate, and its edge is supported on the arc-shaped guide rail; the baffle plates of each regulating unit are used to block each drainage hole; a horizontal regulating elongated hole is provided on the positioning pipe; an regulating block is installed on the regulating pipe, extending into the positioning pipe through the regulating elongated hole; the unlocking regulating key drives the regulating pipe to rotate via the regulating block.

[0009] Furthermore, the locking structure includes an unlocking tube and three movable fan rings; the unlocking tube is rotatably mounted on the positioning tube; the three movable fan rings are fixed on the unlocking tube; three fixed fan rings are installed at intervals at the same height on the inner wall of the well seat; each fixed fan ring is used to press each movable fan ring; an end cap is fixed on the lower end of the positioning tube; a fixed seat is fixed on the end cap; a movable seat is fixed on the unlocking tube; a return spring is elastically connected to the movable seat and the fixed seat; a horizontal unlocking elongated hole is provided on the positioning tube; an unlocking block is fixed on the unlocking tube, extending into the positioning tube through the unlocking elongated hole; the unlocking adjustment key drives the unlocking tube to rotate through the unlocking block.

[0010] Furthermore, the unlocking adjustment key includes a guide tube, an unlocking rod, and a switching spring; a switching elongated hole is vertically provided on the guide tube; a piston is fixed to the lower end of the unlocking rod and vertically slidably installed inside the guide tube; a handle is provided on the upper end of the unlocking rod; the switching spring is installed inside the guide tube and is used to drive the piston to move upward; an adjustment drive block extending through the switching elongated hole is fixed to the unlocking rod; when the drive block is located at the upper end of the switching elongated hole, the drive block is used to adjust the flow adjustment structure; when the unlocking block is located at the lower end of the switching elongated hole, the drive block is used to adjust the locking structure.

[0011] Compared with the prior art, the advantages of this utility model are as follows: The degree of obstruction of the drainage hole by the flow regulating structure is adjusted using the unlocking and adjusting key, allowing for adjustment of the drainage volume according to needs, and the fan-shaped drainage hole is less prone to clogging; the locking structure allows the manhole cover to be locked onto the manhole base, improving safety; the unlocking and adjusting key allows for unlocking the locking structure, facilitating maintenance of the manhole cover's interior; the unlocking and adjusting key drives both the flow regulating structure and the locking structure, simplifying tools; and the reinforcing ribs improve the structural strength of the manhole cover and reduce deformation. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the present invention;

[0013] Figure 2 This is a top view of the present invention;

[0014] Figure 3 AA is a cross-sectional view of this utility model;

[0015] Figure 4 BB is a cross-sectional view of this utility model;

[0016] Figure 5 This is a schematic diagram of the unlocking rod of this utility model;

[0017] In the diagram: 1. Manhole base; 3. Manhole cover plate; 4. Anti-slip protrusion; 5. Drainage hole; 6. Center cover; 7. Semicircular groove; 8. Hinge seat; 9. Arc-shaped guide rail; 10. Reinforcing rib; 11. Cover plate; 12. Adjusting pipe; 13. Adjusting block; 14. Positioning pipe; 15. Adjusting hole; 16. Adjusting elongated hole; 17. Unlocking elongated hole; 18. Unlocking block; 19. End cover; 20. Positioning circular groove; 21. Unlocking pipe; 22. Movable fan ring; 23. Fixed fan ring; 24. Fixed base; 25. Support ring; 26. Movable base; 27. Reset spring; 28. Hook; 29. ​​Filter screen; 30. Unlocking slot; 31. Guide tube; 32. Drive block; 33. Rubber ring; 34. Limiting plate; 35. Switching spring; 36. Switching elongated hole; 37. Annular ramp surface; 38. Handle; 39. Unlocking rod; 40. Insertion hole. Detailed Implementation

[0018] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited to the described embodiments.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0020] In the description of this utility model, it should be understood that the terms "left", "right", "front", "back", "up", "down", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Example 1:

[0022] like Figure 1-5As shown, the ductile iron manhole cover provided by this utility model includes: a manhole base 1, a manhole cover plate 3, a locking structure, a flow regulating structure, and an unlocking and regulating key;

[0023] A hinge seat 8 is provided at the upper wellhead edge of the well base 1; the well cover plate 3 is hingedly installed on the hinge seat 8, and the well cover plate 3 is used to cover the upper wellhead of the well base 1; the inner diameter of the upper wellhead of the well base 1 is 700mm; the outer diameter of the well cover plate 3 is 1200mm; the thickness of the well cover plate 3 is 11-15mm, preferably 12mm; an adjustment hole 15 for inserting an unlocking adjustment key is provided at the center of the well cover plate 3; a positioning tube 14 is installed in a continuous manner at the lower opening of the adjustment hole 15; the positioning tube 14 and the well cover plate are connected in a continuous manner. Six reinforcing ribs 10 are fixedly connected in a ring array between the three parts; six drainage holes 5 are arranged in a ring array on the manhole cover plate 3, and the six drainage holes 5 are located between every two adjacent reinforcing ribs 10; the drainage holes 5 are fan-shaped; the locking structure and the flow regulating structure are both installed on the positioning tube 14; the locking structure is used to lock the manhole cover plate 3 on the manhole seat 1; the flow regulating structure is used to block each drainage hole 5; the unlocking adjustment key is used to adjust the degree of blockage of each drainage hole 5 by the flow regulating structure, and is also used to unlock the locking structure.

[0024] The degree of obstruction of the drainage hole 5 by the flow regulation structure can be adjusted using the unlocking adjustment key, allowing for adjustment of the drainage volume of the drainage hole 5 as needed, and the fan-shaped drainage hole is not easily clogged; the locking structure can lock the manhole cover 3 onto the manhole base 1, improving safety, and the unlocking adjustment key can unlock the locking structure, facilitating maintenance of the manhole cover's interior; the unlocking adjustment key can also drive the flow regulation structure and the locking structure, simplifying tools; the reinforcing ribs 10 can improve the structural strength of the manhole cover and reduce deformation; the manhole cover 3, the positioning pipe 14, and each reinforcing rib 10 are made of ductile iron, and the thickness and structure of the manhole cover 3 enable the ductile iron manhole cover to achieve a load-bearing capacity of D400, making it suitable for use in urban main roads, highways, expressways, and other areas.

[0025] Furthermore, it also includes a filter screen 29; multiple hooks 28 are spaced apart on the lower inner wall of the well base 1; the edges of the filter screen 29 are used to hook onto each hook 28. The filter screen is used to filter out larger debris such as leaves and plastic bags; the hooks 28 are used to hook onto the filter screen 29, making it easy to replace the filter screen 29.

[0026] Furthermore, several anti-slip protrusions 4 are provided on the upper side of the manhole cover plate 3, and the anti-slip protrusions 4 are cross-shaped when viewed from above. The anti-slip protrusions 4 are used to increase the friction on the upper side of the manhole cover plate 3.

[0027] Furthermore, a closed groove communicating with the adjustment hole 15 is provided at the center of the upper side of the manhole cover plate 3; a center cover 6 is embedded in the closed groove; a limiting boss extending into the adjustment hole 15 is coaxially provided on the lower side of the center cover 6, and the circumferential side of the limiting boss is used to fit against the hole wall of the adjustment hole 15; a semi-circular groove 7 communicating with the closed groove is provided on the upper side of the manhole cover plate 3. The center cover 6 covers the adjustment hole 15 to prevent debris from entering the positioning tube 14 during daily use; the semi-circular groove 7 facilitates the removal of the center cover 6.

[0028] Furthermore, the flow regulation structure includes a regulating pipe 12 and multiple regulating units; each regulating unit includes a baffle plate 11 and an arc-shaped guide rail 9; a support ring 25 is provided in the middle of the positioning pipe 14; the regulating pipe 12 is coaxially rotatably mounted on the positioning pipe 14, and its lower edge is supported on the support ring 25; the arc-shaped guide rail 9 is fixed on the lower side of the manhole cover plate 3, and its center is located on the axis of the positioning pipe 14; the cross-section of the arc-shaped guide rail 9 is L-shaped; the baffle plate 11 is fan-shaped and used to cover the flow. Drainage hole 5; A vertical plate fixed to the adjusting tube 12 is provided on the inner circumferential edge of the baffle plate 11, and the outer circumferential edge of the baffle plate 11 is supported on the arc-shaped guide rail 9; A horizontal adjusting elongated hole 16 is provided on the tube wall of the positioning tube 14; Two adjusting blocks 13 are fixed on the inner wall of the adjusting tube 12, which extend into the positioning tube 14 through the adjusting elongated hole 16, and there is a gap between the two adjusting blocks 13; The unlocking adjusting key drives the adjusting tube 12 to rotate through the two adjusting blocks 13.

[0029] The adjustment tube 12 is driven to rotate by the two adjustment blocks 13 using the unlocking adjustment key. The adjustment tube 12 drives the various baffles 11 to rotate synchronously through the vertical plates, thereby adjusting the degree of obstruction of each baffle 11 on each drainage hole 5. This allows for adjustment of the drainage volume of the drainage hole 5 according to the needs, reducing debris entering the sewer when there is no rain and enabling rapid drainage during heavy rain. The outer circumferential edge of the baffle 11 is supported by the arc-shaped guide rail 9, improving the support effect of each baffle 11 and preventing the edges of the baffle 11 from bending downwards.

[0030] Furthermore, the locking structure includes an unlocking tube 21 and three movable fan rings 22; an end cap 19 is fixed to the lower end of the positioning tube 14, and the diameter of the end cap 19 is larger than the outer wall diameter of the positioning tube 14; the unlocking tube 21 is coaxially rotatably mounted on the positioning tube 14, and its lower edge is supported on the edge of the end cap 19; the inner circumferential edges of the three movable fan rings 22 are fixed to the unlocking tube 21 at intervals; three fixed fan rings 23 are installed at intervals at the same height position on the inner wall of the well seat 1; the inner circumferential edges of the lower side of each fixed fan ring 23 are respectively used to press the outer circumferential edges of the upper side of each movable fan ring 22; two fixed seats 24 are fixed at intervals on the circumferential side of the end cap 19; a movable seat 26 located between the two fixed seats 24 is fixed on the unlocking tube 21; the movable seat 26 and One of the fixed seats 24 is elastically connected to a return spring 27; when the return spring 27 is in the contracted state, the outer circumferential edge of the movable fan ring 22 is located below the inner circumferential edge of the corresponding fixed fan ring 23; when the return spring 27 is in the stretched state and the movable seat 26 contacts another fixed seat 24, the movable fan ring 22 is offset from the fixed seat 24, and the movable fan ring 22 can pass through the two adjacent fixed seats 24; two horizontal unlocking elongated holes 17 are provided on the tube wall of the positioning tube 14; two unlocking blocks 18 are fixed on the inner wall of the unlocking tube 21, which extend into the positioning tube 14 through the two unlocking elongated holes 17 respectively; unlocking slots 30 extending to the insertion end are provided on the lower side of the two unlocking blocks 18; the unlocking adjustment key drives the unlocking tube 21 to rotate through the two unlocking blocks 18.

[0031] The unlocking adjustment key drives the unlocking tube 21 to rotate via two unlocking blocks 18. This causes the unlocking tube 21 to rotate, which in turn causes the three movable fan rings 22 to rotate. This allows the movable seat 26 to overcome the tension of the reset spring 27 and contact another fixed seat 24. At this point, the three movable fan rings 22 are misaligned with the three fixed fan rings 23. The unlocking key then lifts and opens the manhole cover 3 via the two unlocking blocks 18, facilitating maintenance of the manhole seat 1. When the manhole cover 3 needs to be replaced, the unlocking key again drives the three movable fan rings 22 to misalign with the three fixed fan rings 23 via the two unlocking blocks 18. This allows the three movable fan rings 22 to descend below the three fixed fan rings 23. At this point, no torque is applied to the unlocking adjustment key, and the reset spring 27 drives the movable seat 26 to reset, causing the three movable fan rings 22 to reset and relock.

[0032] Furthermore, the unlocking adjustment key includes a guide tube 31, an unlocking rod 39, and a switching spring 35; two switching elongated holes 36 are provided along the axial direction on the guide tube 31; an insertion hole 40 is provided on the upper end of the guide tube 31; the lower end of the unlocking rod 39 extends into the guide tube 31 through the insertion hole 40, and a handle 38 is provided on the upper end of the unlocking rod 39; a limiting plate 34 with an outer circumferential diameter larger than the diameter of the insertion hole 40 is provided on the extended end of the unlocking rod 39; a rubber ring 33 that slides and rubs against the inner wall of the guide tube 31 is provided on the outer circumferential surface of the limiting plate 34; the switching spring 35 is positioned... Inside the guide tube 31, and elastically supported between the lower inner wall of the guide tube 31 and the lower side of the limiting plate 34; a drive block 32 is fixed on the extension end of the unlocking rod 39, which extends through two switching elongated holes 36 respectively; the two drive blocks 32 are respectively used to snap onto the two unlocking slots 30, and one drive block 32 is used to snap onto the two adjusting blocks 13; a positioning circular groove 20 is provided at the center of the upper side of the end cover 19, and the diameter of the groove opening of the positioning circular groove 20 is larger than the diameter of the groove bottom; an annular ramp surface 37 is provided on the lower end of the guide tube 31 for fitting the circumferential side of the positioning circular groove 20.

[0033] The positioning groove 20 and the annular ramp 37 are used to position the lower end of the guide tube 31, improving the stability of the unlocking adjustment key rotation. The cooperation between the guide tube 31, unlocking rod 39, switching spring 35, and limiting plate 34 drives the drive block 32 to move along the switching elongated hole 36. The cooperation between the drive block 32 and the switching elongated hole 36 allows the guide tube 31 to rotate synchronously with the unlocking rod 39. When one drive block 32 is aligned with the gap between the two adjustment blocks 13, and the lower end of the guide tube 31 is inserted into the positioning groove 20, the drive block 32 is located between the two adjustment blocks 13, and at this time, the drive block 32 is at the uppermost end of the switching elongated hole 36. This is achieved by using the handle 38. Rotation drives the regulating tube 12 to rotate; the lower end of the guide tube 31 is inserted into the positioning groove 20, and the unlocking rod 39 is pressed down by the handle 38, causing the driving block 32 to move to the lowest end of the switching elongated hole 36. At this time, the upper side of the driving block 32 is lower than the lower side of the unlocking block 18. The driving block 32 is rotated by the handle 38, so that the driving block 32 rotates to the bottom of the unlocking block 18. At this time, the handle 38 is stopped, and the switching spring 35 drives the limiting plate 34 to move upward. The two driving blocks 32 are locked on the unlocking slots 30 of the two unlocking blocks 18. The unlocking tube 21 can be rotated by the handle 38, thereby unlocking the locking structure. The manhole cover 3 can also be opened by lifting the handle 38.

[0034] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A ductile iron manhole cover characterized by: The system includes a well base (1), a well cover plate (3), a locking structure, a flow regulating structure, and an unlocking regulating key. The well cover plate (3) is hinged to the well base (1) and is used to cover the upper well opening of the well base (1). An regulating hole (15) for the unlocking regulating key to be inserted is provided in the center of the well cover plate (3). A positioning tube (14) is installed in a connected manner on the regulating hole (15). A reinforcing rib (10) is connected and fixed to the positioning tube (14) and the well cover plate (3). Multiple drainage holes (5) are provided on the well cover plate (3). The locking structure and the flow regulating structure are both installed on the positioning tube (14). The locking structure is used to lock the well cover plate (3) on the well base (1). The flow regulating structure is used to block each drainage hole (5). The unlocking regulating key is used to adjust the degree of blockage of each drainage hole (5) by the flow regulating structure and is used to unlock the locking structure.

2. The ductile iron cover of claim 1, wherein: It also includes a filter screen (29); the filter screen (29) is installed on the underside of the well base (1) via a hook (28).

3. The ductile iron cover of claim 1, wherein: Several anti-slip protrusions (4) are provided on the upper side of the manhole cover plate (3).

4. The ductile iron cover of claim 1, wherein: A center cover (6) is placed over the upper opening of the adjustment hole (15).

5. The ductile iron cover of claim 1, wherein: The flow regulation structure includes a regulating pipe (12) and multiple regulating units; each regulating unit includes a baffle plate (11) and an arc-shaped guide rail (9); the regulating pipe (12) is rotatably mounted on the positioning pipe (14); the arc-shaped guide rail (9) is mounted on the manhole cover plate (3); the baffle plate (11) is mounted on the positioning pipe (14) through a vertical plate, and its edge is supported on the arc-shaped guide rail (9); the baffle plate (11) of each regulating unit is used to block each drainage hole (5); a horizontal regulating elongated hole (16) is provided on the positioning pipe (14); an regulating block (13) is installed on the regulating pipe (12) and extends into the positioning pipe (14) through the regulating elongated hole (16); the unlocking regulating key drives the regulating pipe (12) to rotate through the regulating block (13).

6. The ductile iron cover of claim 1, wherein: The locking structure includes an unlocking tube (21) and three movable fan rings (22); the unlocking tube (21) is rotatably mounted on the positioning tube (14); the three movable fan rings (22) are fixed on the unlocking tube (21); three fixed fan rings (23) are installed at intervals at the same height position on the inner wall of the well seat (1); each fixed fan ring (23) is used to press each movable fan ring (22); an end cap (19) is fixed on the lower end of the positioning tube (14); and the end cap (19) is fixed on the end cap (19) A fixed seat (24) is fixed on the locking tube (21); a movable seat (26) is fixed on the locking tube (21); a reset spring (27) is elastically connected between the movable seat (26) and the fixed seat (24); a horizontal unlocking slot (17) is provided on the positioning tube (14); an unlocking block (18) is fixed on the locking tube (21) and extends into the positioning tube (14) through the unlocking slot (17); the unlocking adjustment key drives the unlocking tube (21) to rotate through the unlocking block (18).

7. The ductile iron cover of claim 1, wherein: The unlocking adjustment key includes a guide tube (31), an unlocking rod (39), and a switching spring (35); a switching elongated hole (36) is vertically provided on the guide tube (31); a limiting plate (34) is fixed on the lower end of the unlocking rod (39) and is vertically slidably installed in the guide tube (31); a handle (38) is provided on the upper end of the unlocking rod (39); the switching spring (35) is installed in the guide tube (31) and is used to drive the limiting plate (34) to move upward; A drive block (32) extending through a switching elongated hole (36) is fixed on the unlocking rod (39); when the drive block (32) is located at the upper end of the switching elongated hole (36), the drive block (32) is used to adjust the flow regulation structure; when the drive block (32) is located at the lower end of the switching elongated hole (36), the drive block (32) is used to adjust the locking structure.

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