Manhole structure for shallow sand filter

Abstract

The utility model belongs to the technical field of shallow sand filters, and discloses a manhole structure for a shallow sand filter, which comprises a filter main body, an exhaust hole arranged on the filter main body and a water outlet arranged on the filter main body, and an inspection manhole is arranged on the side wall of the filter main body. An inspection manhole is formed in the filter main body, a rotating block is fixed on the side wall of the inspection manhole, a cover plate for sealing the inspection manhole is rotationally arranged on the rotating block, a fixed rod is fixed on the side wall of the filter main body, and a limiting assembly for limiting the cover plate is arranged on the fixed rod. The method has the effect of improving the use experience of workers.

Description

Technical Field

[0001] The utility model relates to the technical field of shallow sand filters, in particular to a manhole structure for shallow sand filters. Background Art

[0002] Among the current circulating water treatment equipment, shallow sand filters are the most commonly used equipment. They are generally modular in design, with the characteristics of flexible layout, fully automatic operation, and non-stop backwashing. Shallow sand filters are mainly used for filtering circulating water, water supply and wastewater in the industrial field. The inspection manhole of the shallow sand filter is generally circular. Due to process reasons, the diameter of the shallow sand filter equipment is generally small. In order to meet the requirements of personnel entering the internal inspection, the diameter of the circular manhole cannot be less than the shoulder width of an average person (minimum DN400).

[0003] A large-diameter shallow sand filter is disclosed in a Chinese utility model patent with publication number CN204709894U, which includes a hollow shallow sand filter, two hanging ears welded on the top of the shallow sand filter, four legs welded on the bottom of the shallow sand filter, a sediment manhole and an exhaust hole welded above the shallow sand filter, and a filter cover manhole and a water inlet welded below the shallow sand filter; an inspection manhole is welded on one side of the shallow sand filter, and a water outlet is welded on the other side, and a sight glass is fixed on the outer surface of the shallow sand filter; it overcomes the shortcomings of the existing shallow sand filter that when a large amount of water needs to be treated, more modules are required, the floor space is too large, and the on-site layout is difficult, and has the advantages of improving the use efficiency, saving land, and reducing the operating cost.

[0004] With respect to the above-mentioned related technologies, the inventor believes that the following defects exist: the above-mentioned device closes the inspection manhole by means of a cover plate set on the inspection manhole. In order to reduce the probability of the cover plate being lost, the cover plate in the above-mentioned device is rotatably connected to the inspection manhole. When the maintenance personnel use the inspection manhole, another staff member needs to manually limit the cover plate to prevent the cover plate from automatically closing and causing harm to the maintenance personnel. During this process, the staff member needs to continuously apply force to the cover plate, which may easily interfere with the staff member's subsequent operations and result in a poor user experience. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a manhole structure for a shallow sand filter.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a manhole structure for a shallow sand filter, comprising a filter body, an exhaust hole arranged on the filter body and a water outlet arranged on the filter body, a side wall of the filter body is provided with an inspection manhole, a rotating block is fixed on the side wall of the inspection manhole, a cover plate for closing the inspection manhole is rotatably provided on the rotating block, a fixing rod is fixed on the side wall of the filter body, and a limiting component for limiting the cover plate is provided on the fixing rod.

[0007] By adopting the above technical solution, when the staff needs to inspect the shallow sand filter, the staff needs to rotate the cover plate to separate the cover plate from the inspection manhole. At this time, the staff needs to continue to rotate the cover plate to the maximum angle, so that the cover plate and the fixed rod can be connected to each other, and the limit assembly can be automatically opened, so that the cover plate remains stable under the action of the limit assembly. Afterwards, the staff needs to drill into the inspection manhole to inspect the shallow sand filter, thereby reducing the difficulty of operation for the staff.

[0008] Furthermore, the fixing rod comprises a fixing plate fixed on the side wall of the filter body, a sliding rod slidably arranged on the upper surface of the fixing plate, and a connecting rod fixed to the sliding rod.

[0009] By adopting the above technical solution, when the staff does not need to use the connecting rod, the staff only needs to pull the connecting rod upwards to make the sliding rod move with the connecting rod, thereby separating the sliding rod and the fixed plate from each other, thereby reducing the probability of passers-by colliding with the connecting rod, thereby improving the staff's user experience.

[0010] Furthermore, the four side walls of the connecting rod are provided with limiting grooves, and the limiting assembly includes four limiting rods slidably arranged in the four limiting grooves, a limiting spring with one end fixed on the side wall of the limiting rod, and a connecting rope with one end fixed on the side wall of the limiting rod close to the limiting spring, the other ends of the four connecting ropes are twisted into one strand, and a limiting hole matching the connecting rod is provided on the side wall of the cover plate, and the other end of the limiting spring is fixed on the inner wall of the limiting groove.

[0011] Furthermore, four side walls of the limiting hole are provided with placement grooves matching the limiting rod.

[0012] Furthermore, an inclined surface is provided on an edge where a side wall of the limiting rod away from the limiting spring intersects with a side wall of the limiting rod away from the fixing plate.

[0013] By adopting the above technical solution, when the staff rotates the cover plate, the cover plate moves toward the direction close to the connecting rod, so that the connecting rod and the limiting hole are connected to each other. At this time, the four limiting rods are completely moved into the limiting groove under the joint action of the inclined surface and the limiting hole. Subsequently, when the limiting groove is directly opposite to the placement groove, the limiting rod is connected to the placement groove under the action of the limiting spring, so that the cover plate remains stable under the action of the limiting rod, thereby reducing the probability of the cover plate automatically resetting.

[0014] Furthermore, an annular groove is provided on the side wall of the connecting rod, an annular block is rotatably arranged in the annular groove, and one ends of the four connecting ropes are fixed to the inner wall of the annular block.

[0015] By adopting the above technical solution, when the staff needs to close the inspection manhole, the staff only needs to rotate the ring block to move the four connecting ropes at the same time, so that the four limit rods are separated from the placement grooves under the action of the connecting ropes. At this time, the staff only needs to rotate the cover plate to separate the cover plate from the connecting rods.

[0016] Furthermore, an accommodating groove for accommodating the connecting rope is provided on the inner wall of the annular groove.

[0017] By adopting the above technical solution, the probability of the connecting rope getting stuck is reduced, thereby improving the user experience of the staff.

[0018] Furthermore, a rubber sheet is provided on the side wall of the connecting rod away from the sliding rod.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. In this application, when the staff needs to inspect the shallow sand filter, the staff needs to rotate the cover plate to separate the cover plate from the inspection manhole. At this time, the staff needs to continue to rotate the cover plate to the maximum angle, so that the cover plate and the fixed rod can be connected to each other, and then the limit assembly can be automatically opened, so that the cover plate remains stable under the action of the limit assembly. Afterwards, the staff needs to drill into the inspection manhole to inspect the shallow sand filter, thereby reducing the difficulty of operation for the staff;

[0021] 2. In this application, when the staff rotates the cover plate, the cover plate moves toward the direction close to the connecting rod, so that the connecting rod and the limiting hole are connected to each other. At this time, the four limiting rods are completely moved into the limiting groove under the joint action of the inclined surface and the limiting hole. Subsequently, when the limiting groove is directly opposite to the placement groove, the limiting rod is connected to the placement groove under the action of the limiting spring, so that the cover plate remains stable under the action of the limiting rod, thereby reducing the probability of the cover plate automatically resetting;

[0022] 3. In this application, when the staff needs to close the inspection manhole, the staff only needs to rotate the ring block to move the four connecting ropes at the same time, so that the four limit rods are separated from the placement grooves under the action of the connecting ropes. At this time, the staff only needs to rotate the cover plate to separate the cover plate from the connecting rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the placement slot and its connection structure of an embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the annular block and its connection structure in an embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the limit groove and its connection structure of an embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of a limit assembly and its connection structure of an embodiment of the utility model.

[0028] In the figure: 1. filter body; 11. exhaust hole; 2. water outlet; 3. inspection manhole; 31. rotating block; 32. cover plate; 4. fixing rod; 41. fixing plate; 42. sliding rod; 43. connecting rod; 44. limiting groove; 5. limiting assembly; 51. limiting rod; 52. limiting spring; 53. connecting rope; 54. limiting hole; 6. placement groove; 7. annular groove; 71. annular block; 8. receiving groove; 9. rubber sheet. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0030] like Figure 1-5 As shown, the embodiment of the present application discloses a manhole structure for a shallow sand filter, including a filter body 1, an inspection manhole 3, a rotating block 31, a cover plate 32, a fixing rod 4, a stopper assembly 5, an annular block 71 and a rubber sheet 9. The exhaust hole 11 is arranged on the filter body 1, the water outlet 2 is arranged on the filter body 1, and the inspection manhole 3 is arranged on the side wall of the filter body 1. The rotating block 31 is a block structure, and the rotating block 31 is fixed on the side wall of the inspection manhole 3. The cover plate 32 is a plate structure, and the cover plate 32 is rotatably arranged on the rotating block 31, and is used to close the inspection manhole 3.

[0031] The fixing rod 4 is fixed on the side wall of the filter body 1, and the fixing rod 4 includes a fixing plate 41, a sliding rod 42 and a connecting rod 43. The fixing plate 41 is a plate-like structure, and the fixing plate 41 is fixed on the side wall of the filter body 1. The sliding rod 42 is a rectangular rod-like structure, and the sliding rod 42 is slidably arranged on the upper surface of the fixing plate 41. The connecting rod 43 is a rectangular rod-like structure, and the connecting rod 43 and the sliding rod 42 are fixed to each other.

[0032] When the staff does not need to use the connecting rod 43, the staff only needs to pull the connecting rod 43 upwards to make the sliding rod 42 move with the connecting rod 43, so that the sliding rod 42 and the fixed plate 41 are separated from each other, thereby reducing the probability of passers-by hitting the connecting rod 43, thereby improving the staff's user experience.

[0033] The four side walls of the connecting rod 43 are provided with limiting grooves 44. The limiting assembly 5 is arranged on the fixed rod 4 and is used to limit the cover plate 32. The limiting assembly 5 includes a limiting rod 51, a limiting spring 52 and a connecting rope 53. The limiting rod 51 is a rectangular rod-shaped structure. Four limiting rods 51 are provided and are slidably arranged in four limiting grooves 44 respectively. One end of the limiting spring 52 is fixed on the side wall of the limiting rod 51, and the other end of the limiting spring 52 is fixed on the inner wall of the limiting groove 44. One end of the connecting rope 53 is fixed on the side wall of the limiting rod 51 close to the limiting spring 52, and the other ends of the four connecting ropes 53 are twisted into one strand. The four side walls of the limiting hole 54 are provided with placement grooves 6 that match the limiting rod 51, and an inclined surface is provided on the edge where the side wall of the limiting rod 51 away from the limiting spring 52 and the side wall of the limiting rod 51 away from the fixed plate 41 intersect.

[0034] When the staff rotates the cover plate 32, the cover plate 32 moves toward the direction close to the connecting rod 43, so that the connecting rod 43 is connected to the limiting hole 54. At this time, the four limiting rods 51 are completely moved into the limiting groove 44 under the joint action of the inclined surface and the limiting hole 54. Subsequently, when the limiting groove 44 is directly opposite to the placement groove 6, the limiting rod 51 is connected to the placement groove 6 under the action of the limiting spring 52, so that the cover plate 32 remains stable under the action of the limiting rod 51, thereby reducing the probability of the cover plate 32 automatically resetting.

[0035] An annular groove 7 is formed on the side wall of the connecting rod 43 . The annular block 71 is a block structure with a circular ring-shaped cross section. The annular block 71 is rotatably disposed in the annular groove 7 , and one end of each of the four connecting ropes 53 is fixed to the inner wall of the annular block 71 .

[0036] When the staff needs to close the inspection manhole 3, the staff only needs to rotate the annular block 71 to move the four connecting ropes 53 at the same time, so that the four limit rods 51 are separated from the placement groove 6 under the action of the connecting ropes 53. At this time, the staff only needs to rotate the cover plate 32 to separate the cover plate 32 and the connecting rod 43 from each other.

[0037] In order to reduce the probability of the connection rope 53 getting stuck and thus improve the user experience of the staff, a receiving groove 8 for receiving the connection rope 53 is opened on the inner wall of the annular groove 7.

[0038] In order to reduce the probability of damage to the cover plate 32 , a rubber sheet 9 is provided on the side wall of the connecting rod 43 away from the sliding rod 42 .

[0039] The principle of use of a manhole structure for a shallow sand filter in this embodiment is as follows: when the staff needs to inspect the shallow sand filter, the staff needs to rotate the cover plate 32 to separate the cover plate 32 from the inspection manhole 3. At this time, the staff needs to continue to rotate the cover plate 32 to the maximum angle, so that the cover plate 32 and the fixing rod 4 are connected to each other, and the limit assembly 5 is automatically opened, so that the cover plate 32 remains stable under the action of the limit assembly 5. Subsequently, the staff needs to drill into the inspection manhole 3 to inspect the shallow sand filter, thereby reducing the difficulty of operation for the staff.

[0040] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A manhole structure for a shallow sand filter, comprising a filter body (1), an exhaust hole (11) arranged on the filter body (1), and a water outlet (2) arranged on the filter body (1), wherein: A maintenance manhole (3) is provided on the side wall of the filter body (1), a rotating block (31) is fixed on the side wall of the maintenance manhole (3), a cover plate (32) for closing the maintenance manhole (3) is rotatably provided on the rotating block (31), a fixing rod (4) is fixed on the side wall of the filter body (1), and a limiting assembly (5) for limiting the cover plate (32) is provided on the fixing rod (4).

2. The manhole structure for a shallow sand filter according to claim 1 is characterized by: The fixing rod (4) comprises a fixing plate (41) fixed on the side wall of the filter body (1), a sliding rod (42) slidably arranged on the upper surface of the fixing plate (41), and a connecting rod (43) fixed to the sliding rod (42).

3. A manhole structure for a shallow sand filter according to claim 2, characterized in that: The four side walls of the connecting rod (43) are provided with limiting grooves (44), the limiting assembly (5) comprises four limiting rods (51) respectively slidably arranged in the four limiting grooves (44), a limiting spring (52) with one end fixed on the side wall of the limiting rod (51), and a connecting rope (53) with one end fixed on the side wall of the limiting rod (51) close to the limiting spring (52), the other ends of the four connecting ropes (53) are twisted into one strand, the side wall of the cover plate (32) is provided with a limiting hole (54) matching the connecting rod (43), and the other end of the limiting spring (52) is fixed on the inner wall of the limiting groove (44).

4. A manhole structure for a shallow sand filter according to claim 3, characterized in that: The four side walls of the limiting hole (54) are each provided with a placement groove (6) that matches the limiting rod (51).

5. The manhole structure for a shallow sand filter according to claim 4 is characterized by: An inclined surface is provided on the edge where the side wall of the limiting rod (51) away from the limiting spring (52) and the side wall thereof away from the fixing plate (41) intersect.

6. A manhole structure for a shallow sand filter according to claim 5, characterized in that: An annular groove (7) is provided on the side wall of the connecting rod (43), an annular block (71) is rotatably arranged in the annular groove (7), and one end of each of the four connecting ropes (53) is fixed to the inner wall of the annular block (71).

7. A manhole structure for a shallow sand filter according to claim 6, characterized in that: An accommodating groove (8) for accommodating a connecting rope (53) is provided on the inner wall of the annular groove (7).

8. A manhole structure for a shallow sand filter according to claim 7, characterized in that: A rubber sheet (9) is provided on the side wall of the connecting rod (43) away from the sliding rod (42).

Images