Manhole in alkali liquor absorption tower

Abstract

The utility model discloses a manhole on an alkali liquor absorption tower, which belongs to the technical field of manholes, and comprises a pipe body, a hole cover, an opening and closing mechanism and a plurality of groups of fixing mechanisms, the hole cover and the pipe body are fixed through the opening and closing mechanism, and the plurality of groups of fixing mechanisms are uniformly arranged at intervals along the circumferential direction of the pipe body and are arranged between the pipe body and the hole cover; each fixing mechanism comprises a hinge seat, a hinge rod, a screw, a rotating rod, a pressing block and a spring, the hinge seats are fixedly arranged on the peripheral face of the side, close to the hole cover, of the pipe body, the bottom ends of the screws are fixedly arranged on the hinge rods, threads are arranged at the top ends of the screws, the rotating rods are in threaded connection with the top ends of the screws, and the pressing blocks are slidably connected to the screws and arranged below the rotating rods. The bottom of the side face, close to the hole cover, of the pressing block sinks inwards, the top of the side face, close to the hole cover, of the pressing block buckles the hole cover, the bottom end of the spring is fixedly arranged on the hinge rod, the top end of the spring is in a suspended state, and the top end of the spring abuts against the pressing block in use. The utility model aims to solve the technical problem that the bolt is easy to lose when the hole cover is opened.

Description

Technical Field

[0001] This utility model belongs to the field of manhole technology, and in particular relates to a manhole on an alkaline absorption tower. Background Technology

[0002] An alkaline absorption tower is a device used for gas purification and waste gas treatment, primarily for removing acidic substances from waste gases to reduce environmental pollution. Manholes are provided on the alkaline absorption tower to allow personnel to enter the tower and inspect, maintain, replace, or clean components such as the packing, spraying equipment, and demisters.

[0003] Currently, traditional manholes generally consist of a pipe body and a cover for sealing the outer end of the pipe body. The inner end of the pipe body is usually fixedly connected to the absorption tower, and the cover is hinged to the outer end of the pipe body. In order to form a seal between the cover and the pipe body when the cover is closed, the existing structure usually has multiple bolt holes corresponding to the cover and the pipe body. After the cover is closed, the corresponding bolts are inserted to achieve a seal. However, since the bolts need to be removed and installed with tools each time, it is cumbersome. In addition, after the bolts are removed, the operators will enter the tower to work first, and the removed bolts will be left aside, which can easily lead to the loss of the bolts. Utility Model Content

[0004] To address the above problems, this utility model provides a manhole for an alkali absorption tower.

[0005] To achieve the above objectives, the present invention provides a manhole for an alkaline absorption tower, comprising a pipe body fixed at one end to the absorption tower and connected to its interior, a manhole cover disposed at the end of the pipe body away from the absorption tower, an opening and closing mechanism, and multiple sets of fixing mechanisms. The manhole cover and the pipe body are fixed together by the opening and closing mechanism, and the multiple sets of fixing mechanisms are evenly spaced along the circumference of the pipe body and disposed between the pipe body and the manhole cover.

[0006] Each set of fixing mechanisms includes a hinge seat perpendicular to the pipe axis, a hinge rod hinged at both ends in the hinge seat, a screw rod arranged along the height of the pipe, a rotating rod, a pressure block, and a spring. The hinge seat is fixed on the outer circumferential surface of the pipe near the hole cover. The bottom end of the screw rod is fixed on the hinge rod and the top end is threaded. The rotating rod is threaded to the top end of the screw rod. The pressure block is slidably connected to the screw rod and is located below the rotating rod. The bottom of the pressure block near the hole cover is recessed inward, and the top of the pressure block near the hole cover engages with the hole cover. The spring is wound around the screw rod. The bottom end of the spring is fixed on the hinge rod and the top end is suspended. When in use, the top end of the spring abuts against the pressure block.

[0007] Optionally, the opening and closing mechanism includes a first mounting base fixed to the side of the hole cover, a first mounting plate detachably connected to the first mounting base, a first gear, a second mounting base, a second mounting plate detachably connected to the second mounting base, and a second gear. The two ends of the first mounting base and the second mounting base are respectively hinged. The second mounting base is fixed to the tube body below the first mounting base. The first gear is semi-circular and fixed to the first mounting plate at its flat side. The second gear is also semi-circular and fixed to the second mounting plate at its flat side. The first gear and the second gear mesh with each other.

[0008] Optionally, the hole cover includes a PP cover arranged in an annular shape and an acrylic glass cover. The diameter of the PP cover is larger than that of the pipe body to completely cover the pipe body port. The acrylic glass cover is circular and is fixed to the middle position of the PP cover by a flange.

[0009] Optionally, a handle is fixed on the rotating rod, and a channel for the screw to pass through is provided in the handle.

[0010] Optionally, a handle is fixedly provided on the hole cover.

[0011] Optionally, a magnet is fixed on the absorption tower at the position where the orifice cover is fully open, and the handle is made of iron material, and the magnet can attract the handle.

[0012] Optionally, a silicone pad is fixed between the plexiglass and the PP cover.

[0013] Optionally, a silicone gasket is fixed between the PP cap and the tube body.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model, through the setting of multiple sets of fixing mechanisms, allows operators to open and close the hole cover by turning the handle, eliminating the need for bolts, reducing the risk of bolt loss, and making it more convenient to use.

[0016] 2. With the opening and closing mechanism of this utility model, the operator can rotate the hole cover to make the first gear rotate around the second gear. In addition, the belt can reduce the offset during the opening of the hole cover, making it easier to open the hole cover.

[0017] 3. By using plexiglass, operators can see the working status inside the absorption tower without opening the cover, further improving convenience. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram to show part of the structure of the hole cover.

[0021] Figure 3 yes Figure 2 Enlarged view of part A in the image.

[0022] Figure 4 yes Figure 2 Enlarged view of part B in the image.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Pipe body; 2. Hole cap; 21. PP cap; 211. Handle; 22. Acrylic glass; 23. Flange; 24. Bolt; 3. Opening and closing mechanism; 31. First mounting base; 32. First mounting plate; 321. Screw; 33. First gear; 34. Second mounting base; 35. Second mounting plate; 36. Second gear; 37. First connecting rod; 371. First pulley; 38. Second connecting rod; 381. Second pulley; 39. Belt; 4. Fixing mechanism; 41. Hinge seat; 42. Hinge rod; 43. Screw; 44. Rotating rod; 441. Handle; 45. Pressure block; 46. Spring; 5. Magnet block. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Reference Figure 1 A manhole for an alkaline absorption tower includes a pipe body 1, a cover 2, an opening and closing mechanism 3, and a fixing mechanism 4. One end of the pipe body 1 is fixed to the absorption tower and communicates with the interior of the absorption tower. The cover 2 is hinged to the end of the pipe body 1 furthest from the absorption tower, and the two are fixed together by the opening and closing mechanism 3. Multiple sets of fixing mechanisms 4 are arranged between the pipe body 1 and the cover 2, and are evenly spaced along the circumference of the pipe body 1. In use, the operator opens the fixing mechanism 4 and then opens the cover 2 to the appropriate position to enter the absorption tower for work.

[0027] Reference Figure 1 and 2The orifice cover 2 includes a PP cover 21 and an acrylic glass 22. The PP cover 21 is annular and its diameter is slightly larger than that of the tube body 1, completely covering the end of the tube body 1. A silicone gasket (not shown in the figure) is fixed to the circumferential surface of the PP cover 21 that contacts the tube body 1 to achieve a seal between the PP cover 21 and the tube body 1. A handle 211, made of iron, is fixed to the top surface of the PP cover 21 at the end away from the closing mechanism 3. A magnet 5 is fixed to the absorption tower at the fully open position of the orifice cover 2. When the orifice cover 2 is opened, it can attract the handle 211 and fix the orifice cover 2. The acrylic glass 22 is circular and located in the middle of the PP cover 21. The operator can see the working status inside the absorption tower through the acrylic glass 22. A flange 23 is provided between the circumferential surface of the acrylic glass 22 and the PP cover 21, and multiple bolts 24 are inserted through the flange 23 to fix the PP cover 21 and the acrylic glass 22. A silicone pad is also fixed between the contact surfaces of the acrylic glass 22 and the PP cap 21. A silicone pad is also fixed between the contact surface of the PP cap 21 and the tube body 1.

[0028] Reference Figure 1 and Figure 3The opening and closing mechanism 3 includes a first mounting base 31, a first mounting plate 32, a first gear 33, a second mounting base 34, a second mounting plate 35, and a second gear 36. The first mounting base 31 and the second mounting base 34 are hinged at their respective ends along their length. The first mounting base 31 is fixed to the side of the PP cover 21, and its center is recessed to form a groove. The first mounting plate 32 is disposed within this groove, and screws 321 are inserted through both ends of the first mounting plate 32 along its length, thus fixing the first mounting plate 32 to the first mounting base 31. The first gear 33 is semi-circular, and its flat surface is fixedly connected to the first mounting plate 32. A first connecting rod 37 passes through the center of the first gear 33, and is rotatably connected to the first gear 33. First pulleys 371 are fixed to both sides of the first gear 33 via the first connecting rod 37. The second mounting base 34 is fixedly disposed on the side of the tube body 1 below the first mounting base 31, and the second mounting base 34 is also recessed in the middle to form a groove. The second mounting plate 35 is disposed in the groove, and screws 321 are inserted through both ends of the second mounting plate 35 along its length direction. The screws 321 are inserted into the second mounting base 34 to fix the second mounting plate 35 to the second mounting base 34. The second gear 36 is also semi-circular and is disposed below the first gear 33. The plane of the second gear 36 is fixedly connected to the second mounting plate 35, and the second gear 36 meshes with the first gear 33. A second connecting rod 38 is disposed in the middle of the second gear 36, and the second connecting rod 38 is rotatably connected to the second gear 36. The second connecting rod 38 is fixedly disposed on both sides of the second gear 36. A belt 39 is wound on the first belt 371 and the second belt 381 located on the same side.

[0029] When the cover 2 needs to be opened, the operator holds the handle 211 and rotates the cover 2. The first gear 33 rotates around the second gear 36 until the cover 2 is fully opened, causing the magnet 5 to attract the handle 211, thus opening the cover 2. When the cover 2 needs to be closed, the operator moves the handle 211 away from the magnet 5 and then closes the cover 2. The belt 39 helps reduce the misalignment of the cover 2 during the opening process.

[0030] Reference Figure 1 and Figure 4Each fixing mechanism 4 includes a hinge seat 41, a hinge rod 42, a screw 43, a rotating rod 44, and a pressure block 45. The hinge seat 41 is arranged perpendicular to the axis of the tube body 1 and is fixed on the outer circumferential surface of the tube body 1 near the PP cover 21. The hinge rod 42 is disposed inside the hinge seat 41, and both ends of the hinge rod 42 are hinged to the hinge seat 41. The screw 43 is arranged along the height direction of the tube body 1, and the bottom end of the screw 43 is fixed on the hinge rod 42. The top end of the screw 43 is threaded. The rotating rod 44 is sleeved on the top end of the screw 43 and is threaded to the screw 43. The top end of the rotating rod 44 is fixed with a handle 441, and the handle 441 has a channel inside, through which the screw 43 can slide. The pressure block 45 is cylindrical to better fit the edge of the PP cover 21. The pressure block 45 is slidably connected to the screw 43 and is disposed below the rotating rod 44. The bottom side of the pressure block 45 near the PP cover 21 is recessed inward, so that the top side of the pressure block 45 near the hole cover 2 can lock the PP cover 21. A spring 46 is provided between the pressure block 45 and the hinge rod 42. The spring 46 is wound around the outside of the screw 43, and the bottom end of the spring 46 is fixed on the hinge rod 42, while the top end is suspended. During use, the top end of the spring 46 will abut against the pressure block 45.

[0031] When the cover 2 is not open, the pressure block 45 is engaged with the PP cover 21, the spring 46 is compressed, and the top of the spring 46 is in contact with the pressure block 45. The rotating rod 44 is against the top surface of the pressure block 45. When it is necessary to open the cover 2, turn the handle 441. The handle 441 drives the rotating rod 44 to rotate. Since the rotating rod 44 is threadedly connected to the screw 43, it can move the rotating rod 44 upward, moving it away from the pressure block 45. At this time, due to the elastic force of the spring 46, the spring 46 will extend and push the pressure block 45 upward, so that the pressure block 45 is no longer in contact with the PP cover 21, and the cover 2 can be opened. Similarly, when the cover 2 is closed, reverse the handle 441, causing the rotating rod 44 to move downward. The rotating rod 44 will press the pressure block 45 downward until the pressure block 45 engages with the PP cover 21. Since the screw 43 is fixed on the hinge rod 42, when the hole cover 2 is opened, the pressure block 45 can rotate the screw 43 away from the PP cover 21 after leaving the PP cover 21, which not only does not hinder the opening of the hole cover 2, but also solves the problem that the existing technology of using bolts for fixing is prone to loss.

[0032] The working principle of this utility model is as follows: When it is necessary to operate inside the absorption tower, the operator can open the fixing mechanism 4 and then open the hole cover 2, so that the magnet 5 can attract the handle 211, and then enter the absorption tower to carry out the work. After the work is completed, the handle 211 is moved away from the magnet 5, the hole cover 2 is closed, and the fixing mechanism 4 is used to fix the hole cover 2. The working status inside the absorption tower can also be seen through the plexiglass 22.

[0033] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A manhole in an alkali absorption tower, characterized in that: The utility model provides a kind of opening and closing mechanism for absorption tower, including one end fixedly arranged on absorption tower and with its inside communication pipe body (1), hole cover (2) is arranged in pipe body (1) away from absorption tower one end, opening and closing mechanism (3), multiple sets of fixed mechanism (4), the hole cover (2) and pipe body (1) are realized the fixation of both by opening and closing mechanism (3), multiple sets of the fixed mechanism (4) are evenly spaced along the circumferential direction of pipe body (1), and are arranged between pipe body (1) and hole cover (2); Each set of the fixed mechanism (4) includes a hinge seat (41) arranged perpendicular to the axis of the pipe body (1), a hinge rod (42) with both ends hingedly connected in the hinge seat (41), a screw rod (43) arranged along the height direction of the pipe body (1), a rotating rod (44), a pressing block (45), and a spring (46). The hinge seat (41) is fixedly arranged on the outer circumferential surface of the pipe body (1) near the hole cover (2). The bottom end of the screw rod (43) is fixedly arranged on the hinge rod (42), and the top end is provided with a screw thread. The rotating rod (44) is threadedly connected to the top end of the screw rod (43). The pressing block (45) is slidingly connected to the screw rod (43) and arranged below the rotating rod (44). The side surface bottom near the hole cover (2) of the pressing block (45) is recessed inward, and the side surface top near the hole cover (2) of the pressing block (45) is buckled to the hole cover (2). The spring (46) is wound around the screw rod (43), with the bottom end fixedly arranged on the hinge rod (42) and the top end in a suspended state. When in use, the top end of the spring (46) abuts against the pressing block (45).

2. The manhole in the caustic scrubber column according to claim 1, characterized in that: The opening and closing mechanism (3) includes a first mounting seat (31) fixedly arranged on the side surface of the hole cover (2), a first mounting plate (32) detachably connected to the first mounting seat (31), a first gear (33), a second mounting seat (34), a second mounting plate (35) detachably connected to the second mounting seat (34), and a second gear (36). The two ends of the first mounting seat (31) and the second mounting seat (34) are respectively hingedly connected. The second mounting seat (34) is fixedly arranged below the first mounting seat (31) on the pipe body (1). The first gear (33) is arranged in a semicircle and fixedly arranged on the first mounting plate (32) at the flat surface. The second gear (36) is also arranged in a semicircle and fixedly arranged on the second mounting plate (35) at the flat surface. The first gear (33) and the second gear (36) are engaged.

3. The manway on an alkali scrubber column according to claim 1, characterized in that: The hole cover (2) includes a PP cover (21) arranged in a ring shape and organic glass (22). The diameter of the PP cover (21) is larger than that of the pipe body (1) to completely cover the port of the pipe body (1). The organic glass (22) is arranged in a circular shape and fixedly arranged at the middle position of the PP cover (21) by a flange (23).

4. The manway on an alkali scrubber column according to claim 1, characterized in that: A handle (441) is fixedly arranged on the rotating rod (44), and a hole is formed in the handle (441) for the screw rod (43) to pass through.

5. The manway on an alkali scrubber column according to claim 1, characterized in that: A handle (211) is fixedly arranged on the hole cover (2).

6. The manhole in the caustic scrubber column according to claim 5, characterized in that: A magnet block (5) is fixedly arranged on the absorption tower at the position where the hole cover (2) is completely opened. The handle (211) is made of iron material, and the magnet block (5) can attract the handle (211).

7. The manway on an alkali scrubber column according to claim 3, characterized in that: Silica gel pad is fixed between the organic glass (22) and the PP cover (21).

8. The manway on an alkali scrubber column according to claim 3, characterized in that: Silica gel pad is fixed between the PP cover (21) and the pipe body (1).

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