Desanding device for nodular cast iron well lid

Abstract

The utility model relates to the technical field of well lid production, in particular to a nodular cast iron well lid desanding device which comprises a shell, a fan installed in the shell and used for blowing off grit and an installation frame for supporting a well lid. A brush disc used for scraping and brushing the surface of a well lid, a main shaft used for driving the brush disc to revolve around the center of the shell, a transmission box used for driving the brush disc to rotate around the center of the brush disc and a sand groove used for collecting shakeout are arranged in the shell, the shell is of a cylindrical structure provided with a cavity, the fan is installed at the bottom of the cavity of the shell, and the installation frame is arranged at the edge of an opening in the shell. The main shaft is installed in the center of the shell, and the transmission box surrounds the outer side of one end of the main shaft and is fixedly connected with the shell. The well lid is elastically supported by the mounting frame, so that the well lid can be hammered and vibrated to improve the sand removal efficiency, the brush disc capable of rotating and revolving completely covers the surface of the well lid, meanwhile, a falling space is provided for grit, the fan is used for assisting sand shakeout, the sand shakeout speed is increased, and meanwhile floating ash is prevented from flying.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole cover production, in particular to a sand removing device for ductile iron manhole covers. Background Art

[0002] Ductile iron manhole covers are produced by making a nodular casting mold and pouring high-temperature molten iron into the mold. After cooling, the gravel on the surface of the casting is removed and trimmed to make the manhole cover. When the manhole cover casting is separated from the mold, a large amount of gravel will adhere to the surface of the manhole cover. These gravels will affect the subsequent trimming accuracy and need to be quickly removed. However, due to the gaps and lettering on the surface of the manhole cover, the gravel will be stuck, resulting in very low sand cleaning efficiency. Therefore, a sand removing device for ductile iron manhole covers is needed to improve the efficiency.

[0003] Chinese patent document CN113118421A discloses a sand removing structure device for the surface layer of cast iron manhole covers and its dust removal method, including an outer box body. A sand removing groove is opened inside the outer box body. Sand removing devices are arranged on the outer box body at both ends of the sand removing groove. A power component is arranged on the outer box body below the sand removing device. A protection device is arranged above the outer box body. A collection device is arranged below the outer box body. This solution can effectively remove sand, increase the sand removing speed, improve the stability during rotation, ensure its positioning efficiency, and the main cylinder can drive the pressure plate to move backward to facilitate the disassembly of the cast iron manhole cover body from the rotating bearing, improve the disassembly and assembly convenience, carry out recycling, improve production efficiency, reduce production costs, remove dust, prevent excessive dust from affecting the processing environment, ensure the quality of the recycled gravel, and increase the dust removal efficiency of the entire device.

[0004] The above solution still has several improvement points: axially fixing the manhole cover cannot perform vibration sand removal, resulting in low efficiency; the brush disc cannot cover the entire surface of the manhole cover, leaving a cleaning blind area. Content of the Utility Model

[0005] To solve the problems of the prior art, the utility model provides a sand removing device for ductile iron manhole covers, including a housing, a blower installed in the housing for blowing off gravel, and a mounting rack for supporting the manhole cover. A brush disc for scraping the surface of the manhole cover, a main shaft for driving the brush disc to revolve around the center of the housing, a transmission box for driving the brush disc to rotate around its own center, and a sand groove for collecting the falling sand are arranged in the housing. The housing is a cylindrical structure with a cavity, and its opening faces upward. The blower is installed at the bottom of the cavity in the housing. The mounting rack is arranged at the opening edge of the housing. The main shaft is installed at the center of the housing. The transmission box surrounds the outside of one end of the main shaft and is fixedly connected to the housing. The brush discs are arrayed on the transmission box and their disc surfaces are attached to the surface of the manhole cover. The sand groove is arranged at the edge of the bottom of the cavity in the housing.

[0006] Preferably, the first motor is installed at the bottom of the housing and near one end of the main shaft. The tapered disc is in the transmission box and is connected to the other end of the main shaft. The straight wheel set is arranged between the first motor and the main shaft.

[0007] Preferably, support arms are arrayed and installed around the transmission box, the transmission shaft is installed in the support arms, and the bevel gear is installed at one end of the transmission shaft and is located in the transmission box.

[0008] Preferably, a rotating shaft is connected to the bottom of the disk surface of the brush disk, a protective shell surrounds the outside of the rotating shaft, and a cone pulley set is arranged in the protective shell.

[0009] Preferably, the ducts are arrayed in the bottom cavity of the housing, the fan is installed in the ducts and is connected to the second motor, and the filter screen is installed at the pipe orifice of the ducts and is located in the housing cavity.

[0010] Preferably, the top cover surrounds the outside of the filter screen and is rotatably connected to the pipe orifice of the ducts, a threaded interface is arranged at the pipe orifice of the ducts, and air holes are arrayed on the side surface of the ducts.

[0011] Preferably, the gasket is concentrically arranged with the mounting frame, one end of the spring is arranged at the top edge of the housing, and the other end is connected to the lower surface of the gasket.

[0012] Preferably, grooves are arrayed on the top edge of the housing, the telescopic columns are installed in the grooves and are surrounded by the springs.

[0013] The beneficial effects of the present utility model compared with the prior art are as follows:

[0014] 1. The present utility model uses the mounting frame to elastically support the manhole cover, enabling the manhole cover to be hammered and vibrated to improve the sand removal efficiency. Specifically, by hammering the surface on the upward side of the manhole cover, the gravel attached to the other side of the manhole cover falls into the housing cavity. The spring provides an elastic margin, and the gasket is used to increase the contact area between the mounting frame and the manhole cover, thereby reducing the pressure and avoiding local hammering damage.

[0015] 2. The present utility model uses a brush disk that can rotate both self - rotatably and revolvably to completely cover the surface of the manhole cover while providing a falling space for the gravel. Specifically, the brush disk that can rotate both self - rotatably and revolvably is used to scrape the gaps and grooves on the surface of the manhole cover to ensure that no gravel is embedded in the gaps and cannot fall off.

[0016] 3. The present utility model uses a fan to assist in sand falling, accelerating the sand - falling speed while avoiding floating dust flying. Specifically, the fan can switch between two modes of blowing and suction. When removing sand, the blowing mode is used to assist the brush disk in cleaning the sand, and the suction mode is used when removing the manhole cover to prevent the staff from inhaling a large amount of floating dust and endangering their health. Description of the Drawings

[0017] Figure 1 is a three - dimensional view of a ductile iron manhole cover sand removal device.

[0018] Figure 2 is a working schematic diagram of a ductile iron manhole cover sand removal device.

[0019] Figure 3 It is a three-dimensional view of the housing in a sand removal device for ductile iron manhole covers.

[0020] Figure 4 It is a three-dimensional view of the drive box in a sand removal device for ductile iron manhole covers.

[0021] Figure 5 It is a three-dimensional view of the main shaft in a sand removal device for ductile iron manhole covers.

[0022] Figure 6 It is an exploded part drawing of the fan in a sand removal device for ductile iron manhole covers.

[0023] The reference numerals in the figure are: 1. housing; 2. main shaft; 21. first motor; 22. tapered disc; 23. straight gear set; 3. drive box; 31. support arm; 32. transmission shaft; 33. bevel gear; 4. brush disc; 41. rotating shaft; 42. protective shell; 43. tapered wheel set; 5. sand groove; 6. fan; 61. conduit; 62. second motor; 63. filter screen; 631. threaded interface; 632. air hole; 633. top cover; 7. mounting bracket; 71. gasket; 72. spring; 721. telescopic column; 722. groove. Specific embodiments

[0024] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] See Figures 1 to 6 As shown, a sand removal device for ductile iron manhole covers includes a housing 1, a fan 6 installed in the housing 1 for blowing off sand and gravel, and a mounting bracket 7 for supporting the manhole cover. A brush disc 4 for scraping the surface of the manhole cover, a main shaft 2 for driving the brush disc 4 to revolve around the center of the housing 1, a drive box 3 for driving the brush disc 4 to rotate around its own center, and a sand groove 5 for collecting the fallen sand are provided in the housing 1. The housing 1 is a cylindrical structure with a cavity, and its opening faces upward. The fan 6 is installed at the bottom of the cavity in the housing 1. The mounting bracket 7 is arranged at the opening edge of the housing 1. The main shaft 2 is installed at the center of the housing 1. The drive box 3 surrounds the outside of one end of the main shaft 2 and is fixedly connected to the housing 1. The brush discs 4 are arranged in an array on the drive box 3 and their disc surfaces are in contact with the surface of the manhole cover. The sand groove 5 is arranged at the edge of the bottom of the cavity in the housing 1.

[0026] The device elastically supports the manhole cover through the mounting bracket 7. By hammering the surface on the upward side of the manhole cover, the gravel attached to the other side of the manhole cover falls into the cavity of the housing 1. At the same time, the brush disc 4 that can rotate both self - rotatably and revolvably is used to scrape the gaps and grooves 722 on the surface of the manhole cover to ensure that no gravel is embedded in the gaps and cannot fall off. The fan 6 can switch between two modes of blowing and suction. When removing gravel, the blowing mode is used to assist the brush disc 4 in cleaning the gravel. When the manhole cover is removed from the device, the suction mode is used to quickly absorb the floating dust in the cavity of the housing 1, avoiding the staff from inhaling a large amount of floating dust and endangering their health.

[0027] See Figure 5 As shown, the first motor 21 is installed at the bottom of the housing 1 and near one end of the main shaft 2. The tapered disc 22 is located in the transmission box 3 and is connected to the other end of the main shaft 2. The straight - wheel group 23 is arranged between the first motor 21 and the main shaft 2.

[0028] The first motor 21 provides power for the rotation of the main shaft 2, thus driving the brush disc 4 to revolve around the main shaft 2. The output transmission ratio of the first motor 21 is changed through the straight - wheel group 23 to control the rotation speed of the main shaft 2. The tapered disc 22 rotates with the main shaft 2 in the transmission box 3 to drive the self - rotation of the brush disc 4.

[0029] See Figures 2 to 4 As shown, the support arms 31 are array - mounted around the transmission box 3. The transmission shaft 32 is installed in the support arms 31. The bevel gear 33 is installed at one end of the transmission shaft 32 and is located in the transmission box 3.

[0030] The support arms 31 are used to protect the transmission shaft 32 from being impacted by the gravel falling on the surface of the manhole cover, thus affecting the normal power transmission. The bevel gear 33 meshes with the tapered disc 22 on the main shaft 2, so that the transmission shaft 32 is driven by the main shaft 2 and the direction of the force is changed.

[0031] See Figure 3 and Figure 4 As shown, the bottom of the disc surface of the brush disc 4 is connected with a rotating shaft 41. The protective shell 42 surrounds the outside of the rotating shaft 41. The tapered - wheel group 43 is arranged in the protective shell 42.

[0032] The rotating shaft 41 is driven by the transmission shaft 32 on the transmission box 3 to drive the self - rotation of the brush disc 4. The tapered - wheel group 43 is arranged at the connection between the transmission shaft 32 and the rotating shaft 41. The protective shell 42 is used to protect the tapered - wheel group 43 from being impacted by gravel.

[0033] See Figures 4 to 6 As shown, the ducts 61 are array - arranged in the bottom cavity of the housing 1. The fan 6 is installed in the ducts 61 and is connected to the second motor 62. The filter screen 63 is installed at the orifice of the ducts 61 and is located in the cavity of the housing 1.

[0034] The conduit 61 is used to install the fan 6. The second motor 62 supplies power for the rotation of the fan 6. The wind force of the fan 6 blows towards the surface of the manhole cover along the direction of the conduit 61, causing a large amount of gravel attached to the manhole cover to fall into the sand groove 5, facilitating the centralized treatment of the fallen sand. At the same time, the filter screen 63 is used to prevent the falling gravel from entering the conduit 61 and accumulating, which may affect the rotation of the fan 6.

[0035] See Figure 6 As shown, the top cover 633 surrounds the outside of the filter screen 63 and is rotatably connected to the pipe orifice of the conduit 61. The threaded interface 631 is arranged at the pipe orifice of the conduit 61, and the air holes 632 are arranged in an array on the side surface of the conduit 61.

[0036] Since the falling gravel will block the filter screen 63, the top cover 633 is provided for quickly installing and disassembling the filter screen 63, facilitating the dust cleaning and maintenance of the filter screen 63. At the same time, the air holes 632 are used to ensure the air pressure balance when the filter screen 63 is blocked. When the gravel covers the entire filter screen 63, the fan 6 operates in the air suction mode from the air holes 632.

[0037] See Figures 1 to 3 As shown, the gasket 71 is concentrically arranged with the mounting bracket 7. One end of the spring 72 is arranged at the top edge of the housing 1, and the other end is connected to the lower surface of the gasket 71.

[0038] Since it is necessary to hammer the manhole cover to shake off the gravel through vibration, the mounting bracket 7 supporting the manhole cover must be elastic to avoid damage to the device caused by continuous hammering. The spring 72 provides an elastic margin, and the gasket 71 is used to increase the contact area between the mounting bracket 7 and the manhole cover, thereby reducing the pressure and avoiding local hammering damage.

[0039] See Figure 3 As shown, the grooves 722 are arranged in an array on the top edge of the housing 1. The telescopic columns 721 are installed in the grooves 722 and are surrounded by the spring 72.

[0040] The telescopic columns 721 are used to prevent the spring 72 from falling off during hammering and enhance the connection strength between the gasket 71 and the mounting bracket 7. The grooves 722 are used to extend the telescopic amount of the telescopic columns 721, avoiding excessive pressure on the top of the telescopic columns 721 when the manhole cover drops significantly, resulting in local excessive pressure.

[0041] The above embodiments only represent one or several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. A ductile iron manhole cover sand removal device, comprising a housing (1), a fan (6) installed in the housing (1) for blowing off sand and gravel, and a mounting frame (7) for supporting the manhole cover; It is characterized in that A brush disc (4) for scraping the surface of a manhole cover, a main shaft (2) for driving the brush disc (4) to revolve around the center of the housing (1), a transmission box (3) for driving the brush disc (4) to rotate around its own center, and a sand trough (5) for collecting fallen sand are arranged in the housing (1). The housing (1) is a cylindrical structure with a cavity, the opening of which faces upward. The fan (6) is mounted at the bottom of the cavity in the housing (1). The mounting frame (7) is arranged at the edge of the opening on the housing (1). The main shaft (2) is mounted at the center of the housing (1). The transmission box (3) surrounds the outer side of one end of the main shaft (2) and is fixedly connected to the housing (1). The brush disc (4) array is mounted on the transmission box (3) and its disc surface is in contact with the surface of the manhole cover. The sand trough (5) is arranged at the edge of the bottom of the cavity of the housing (1).

2. A ductile iron manhole cover sand removal device according to claim 1, characterized in that: The first motor (21) is mounted at the bottom of the housing (1) and close to one end of the main shaft (2); the cone disc (22) is located in the transmission box (3) and connected to the other end of the main shaft (2); and the straight wheel group (23) is arranged between the first motor (21) and the main shaft (2).

3. The ductile iron manhole cover sand removal device according to claim 1, characterized in that: Support arms (31) are installed in an array around the transmission box (3), a transmission shaft (32) is installed in the support arms (31), and a bevel gear (33) is installed at one end of the transmission shaft (32) and is located in the transmission box (3).

4. The ductile iron manhole cover sand removal device according to claim 1, characterized in that: The bottom of the brush disc (4) is connected to a rotating shaft (41), a protective shell (42) surrounds the outer side of the rotating shaft (41), and a cone wheel set (43) is arranged in the protective shell (42).

5. The ductile iron manhole cover sand removal device according to claim 1, characterized in that: An array of ducts (61) is arranged in the bottom cavity of the housing (1), a fan (6) is installed in the ducts (61) and connected to a second motor (62), and a filter (63) is installed at the pipe mouth of the duct (61) and is located in the cavity of the housing (1).

6. A ductile iron manhole cover sand removal device according to claim 5, characterized in that: The top cover (633) surrounds the outside of the filter screen (63) and is rotatably connected to the pipe mouth of the conduit (61). The threaded interface (631) is arranged at the pipe mouth of the conduit (61), and the air hole (632) array is arranged on the side of the conduit (61).

7. The ductile iron manhole cover sand removal device according to claim 1, characterized in that: The gasket (71) is arranged concentrically with the mounting frame (7); one end of the spring (72) is arranged on the top edge of the housing (1), and the other end is connected to the lower surface of the gasket (71).

8. The ductile iron manhole cover sand removal device according to claim 7, characterized in that: An array of grooves (722) is provided on the top edge of the housing (1), and the telescopic columns (721) are installed in the grooves (722) and surrounded by the springs (72).

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