Manhole device of railway tank car

Abstract

The utility model provides a manhole device of a railway tank car, which is used for solving the technical problems that the opening angle of a hole cover of the existing manhole device is smaller, the opening height is too high, a swing arm of a crane pipe is prevented from being normally inserted into the bottom of a tank body, the weight of the manhole cover is larger, and manual opening is more laborious. The manhole device comprises a manhole seat arranged at the top of the railway tank car, and the manhole seat is connected with a manhole cover through an opening assisting assembly and a fastening assembly. Springs sleeve the two ends of a rotating shaft in the opening assisting assembly, and when the manhole cover is closed, the springs are in a compressed state; when the manhole cover is opened, the opening angle of the manhole cover is gradually increased under the action of elastic force until the stop boss on the upper hinge seat abuts against the cross beam on the lower hinge seat. Through cooperation of the opening assisting assembly, the stopping boss and the cross beam, the opening angle of the manhole cover can be larger, the opening height is lower, and the problem that a swing arm of a crane pipe cannot be normally inserted into the bottom of a tank body is solved.

Description

Technical Field

[0001] The utility model relates to a manhole device, in particular to a manhole device for a railway tank car. Background Art

[0002] When the railway tank car is unloading oil, after parking the railway tank car at the designated unloading position, the staff needs to open the manhole cover of the manhole, and then insert the loading and unloading crane pipe from the top of the manhole cover to the bottom of the tank body, connect the tank car's oil tank to start unloading oil. In the prior art, the angle between the manhole cover and the upper surface of the manhole seat is an obtuse angle after it is opened, but the opening angle of the manhole cover is small. If the height is too high after opening, it will hinder the normal insertion of the crane pipe swing arm into the bottom of the tank body. For example, the manhole cover of the existing railway tank car can be opened to 110°. At this time, the highest position of the manhole cover is 250mm higher than the side ladder railing of the railway tank car, resulting in the crane pipe swing arm being unable to be normally inserted into the manhole seat when unloading oil. The railway tank car needs to be moved twice to the appropriate position. In addition, the manhole cover is heavy, and the weight of a manhole cover can reach 30 to 40 kilograms, which is laborious to open manually. Therefore, opening the manhole cover again after the second move seriously affects the continuity and efficiency of the oil unloading operation, and increases the user's labor cost and time cost. Utility Model Content

[0003] The utility model aims to solve the problems that the manhole cover of the existing manhole device has a small opening angle and an excessively high opening height, which hinders the normal insertion of the crane pipe swing arm into the bottom of the tank body, as well as the technical problems that the manhole cover is heavy and manual opening is laborious, and a manhole device for a railway tank car is proposed.

[0004] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0005] A manhole device for a railway tank car, which is special in that it comprises a manhole seat and a manhole cover, wherein the manhole seat is connected to the manhole cover through an opening assisting assembly and a fastening assembly;

[0006] A lower hinge seat is arranged on the upper side of the manhole seat, and the lower hinge seat comprises two opposite connecting pieces, and a hinge circular hole is arranged on the side of each connecting piece close to the manhole seat, and a hinge hole is arranged on the side away from the manhole seat, and the hinge hole is in the shape of an elongated strip, and its length direction is vertically arranged; a crossbeam is also arranged between the two connecting pieces, and the crossbeam is located below the two hinge holes; a plurality of bolt seats distributed along the circumference are also arranged on the upper side of the manhole seat;

[0007] The side of the manhole cover is provided with an upper hinge seat installed between two connecting pieces of the lower hinge seat, the upper hinge seat extends radially outward, the upper surface of the upper hinge seat is provided with a stop boss, and the two side surfaces of the upper hinge seat are respectively provided with rotating shaft circular holes corresponding to the hinge holes; the side of the manhole cover is also provided with a plurality of clamping seats corresponding to the positions of the plurality of bolt seats; two spring hinge seats are provided on the upper surface of the manhole cover near the upper hinge seat; the stop boss is used to abut against the crossbeam when the manhole cover is fully opened;

[0008] The opening assistance assembly comprises a rotating shaft inserted into a rotating shaft circular hole and a hinge hole, two springs respectively sleeved on the two ends of the rotating shaft, and a steel pipe parallel to the rotating shaft; the two ends of the two springs close to each other are respectively provided with hinged parts, and the two hinged parts are respectively inserted into two spring hinge seats; the other ends of the two springs are both provided with fixed parts, and the two fixed parts are connected to the two ends of the steel pipe, and the steel pipe is inserted into the hinged circular hole; the spring is used to compress when the manhole cover is closed, and the elastic force is released when the manhole cover is opened so that the manhole cover rotates around the rotating shaft;

[0009] The fastening assembly is used to connect one end with the bolt seat when the manhole cover is closed, and the other end is clamped in the clamping seat.

[0010] Furthermore, the fastening assembly includes a nut seat and a fastening bolt, a threaded hole is opened at the center of the nut seat, one end of the fastening bolt is inserted into the threaded hole, and a fastening bolt pin perpendicular to the fastening bolt is inserted into the other end, the fastening bolt and the fastening bolt pin are connected by screws, and the fastening bolt pin is connected to the bolt seat; when the manhole cover is closed, the fastening bolt is clamped in the clamping seat, and the nut seat is pressed against the upper end of the clamping seat.

[0011] Furthermore, the bolt seat includes two opposite fixing plates, and bolt seat holes are arranged on the fixing plates; and the two ends of the fastening bolt pin are respectively inserted into the two bolt seat holes.

[0012] Furthermore, the clamping seat includes two opposite clamping arms for clamping the fastening bolts of the fastening assembly, and the outer ends of the clamping arms are provided with nut stops for preventing the nut seat from sliding on the clamping seat.

[0013] Furthermore, two inner end covers are provided on the rotating shaft, which are respectively used to limit the ends where the hinged parts of the two springs are located; two outer end covers are also provided on the rotating shaft, and the two outer end covers are respectively fixed at both ends of the rotating shaft, and are respectively used to limit the ends where the fixed parts of the two springs are located.

[0014] Furthermore, a circular hole is provided on the spring hinge seat, and the hinge portion of the spring is inserted into the corresponding circular hole.

[0015] Furthermore, a handle is provided on the manhole cover, and the handle is located on the side of the manhole cover at a position opposite to the upper hinge seat.

[0016] Beneficial effects of the utility model:

[0017] 1. The utility model includes a manhole seat arranged on the top of the railway tank car, and the manhole seat is connected to the manhole cover through an opening-assisting assembly and a fastening assembly. Springs are sleeved at both ends of the rotating shaft in the opening-assisting assembly. When the manhole cover is closed, the springs are in a compressed state; when the manhole cover is opened, the manhole cover is acted upon by elastic force, and the opening angle gradually increases. After the elastic force of the spring is completely released, the manhole cover continues to open under the action of gravity and manpower until the stop boss on the upper hinge seat abuts against the crossbeam on the lower hinge seat. Through the cooperation of the opening-assisting assembly, the stop boss and the crossbeam, the opening angle of the manhole cover can be made larger and the opening height can be made lower, thereby solving the problem that the crane pipe swing arm cannot be normally inserted into the bottom of the tank body.

[0018] 2. The opening assistance component in the utility model can assist the operator to open the manhole cover. Since the manhole cover is heavy, it is time-consuming and laborious to operate it solely by manpower. A hinged part is arranged on the inner side of the spring in the opening assistance component, which is fixed in the spring hinge seat on the manhole cover; a fixed part is arranged on the outer side, and the fixed parts of the two springs are inserted into the steel pipe from both ends of the steel pipe, and the steel pipe is fixed in the hinged circular hole on the lower hinge seat. Therefore, when the manhole cover is closed, the spring is already in a compressed state. When the manhole cover is opened, the staff applies a small force, and the manhole cover can be slowly opened with the help of the elastic force of the spring. It helps the operator save physical strength to a great extent, improves the convenience of operation, improves the oil unloading efficiency, and reduces the labor cost and time cost of the user.

[0019] 3. The utility model is provided with a fastening assembly that is easy to operate to ensure the firmness of the manhole cover when closed. The fastening assembly is evenly distributed along the circumference, and the fastening assembly is fixed in the bolt seat on the side of the manhole seat by the fastening bolt pin. When the manhole cover is closed, the fastening assembly is clamped in the clamping seat of the manhole cover by the nut seat. The clamping seat is also provided with a nut stopper to prevent the fastening assembly from loosening due to the shaking of the vehicle, etc., thereby increasing the reliability of the fastening assembly. When the manhole cover needs to be opened, it is only necessary to rotate the nut seat to relatively separate the nut seat from the fastening bolt, and the fastening assembly can be easily turned out from the clamping seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an embodiment of a manhole device for a railway tank car of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a manhole seat in an embodiment of a manhole device for a railway tank car of the utility model;

[0022] Figure 3It is a structural schematic diagram of a manhole cover in an embodiment of a manhole device for a railway tank car of the utility model;

[0023] Figure 4 It is a structural schematic diagram of an opening assistance assembly in an embodiment of a manhole device for a railway tank car of the utility model;

[0024] Figure 5 It is a structural schematic diagram of a fastening assembly in an embodiment of a manhole device for a railway tank car of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a fastening assembly when the manhole cover is fully closed in an embodiment of a manhole device for a railway tank car of the utility model;

[0026] Figure 7 It is a structural schematic diagram of a fastening assembly after the manhole cover is opened in an embodiment of a manhole device for a railway tank car of the utility model;

[0027] Figure 8 It is a side view of an embodiment of a manhole device for a railway tank car of the utility model when the manhole cover is fully opened.

[0028] Description of reference numerals:

[0029] 10-manhole seat, 11-hinge hole, 12-crossbeam, 13-hinge circular hole, 14-bolt seat, 15-lower hinge seat; 20-manhole cover, 21-rotating shaft circular hole, 22-stop boss, 23-spring hinge seat, 24-clamping seat, 25-nut stop, 26-upper hinge seat; 30-fastening assembly, 31-fastening bolt pin, 32-screw, 33-fastening bolt, 34-nut seat; 40-opening aid assembly, 41-rotating shaft, 42-spring, 43-inner end cover, 44-outer end cover, 45-nut, 46-steel pipe, 47-fixing part, 48-hinge part. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] The utility model provides a manhole device for a railway tank car, such as Figure 1 As shown, it includes a manhole seat 10 disposed on the top of a railway tank car, and the manhole seat 10 is connected to the manhole cover 20 through an opening assisting assembly 40 and a fastening assembly 30. Figure 2As shown, the manhole seat 10 is a cast cylindrical shape, and there are 6 bolt seats 14 evenly distributed along the circumference of the upper side edge of the manhole seat 10. The bolt seats 14 are composed of two opposite fixing plates, and the fixing plates are provided with bolt seat holes for matching with the fastening bolt pins 31 of the fastening assembly 30. A lower hinge seat 15 is also provided on the upper side edge of the manhole seat 10, which is composed of two opposite connecting plates. Each connecting plate is provided with a hinge circular hole 13 on the side close to the outer wall of the manhole seat 10, which is used to pass the steel pipe 46 in the auxiliary opening assembly 40; each connecting plate is provided with a hinge hole 11 on the side away from the outer wall of the manhole seat 10, which is used to pass the rotating shaft 41 of the auxiliary opening assembly 40. The hinge hole 11 is long and has a width that matches the diameter of the rotating shaft 41, and its length direction is set in the vertical direction. A crossbeam 12 is also provided between the two connecting plates, and the crossbeam 12 is located below the two hinge holes 11.

[0032] like Figure 3 As shown, the manhole cover 20 is a cast circular cover, and six clamping seats 24 corresponding to the positions of the bolt seats 14 are evenly distributed along the circumference of the outer edge of the manhole cover 20. The clamping seat 24 includes two opposite clamping arms for clamping the upper end of the fastening assembly 30. The outer end of the clamping arm is provided with a nut stopper 25 to prevent the fastening assembly 30 from sliding in the clamping seat 24. An upper hinge seat 26 extending outward and matching with the lower hinge seat 15 is also provided on the outer side of the manhole cover 20. A stopper boss 22 is provided on the upper surface of the upper hinge seat 26 for abutting against the crossbeam 12 when the manhole cover 20 is fully opened. Two rotating shaft circular holes 21 corresponding to the hinge holes 11 are provided on the outer surface of the upper hinge seat 26 for passing the rotating shaft 41, and the diameter of the rotating shaft circular hole 21 is adapted to the diameter of the rotating shaft 41. The upper hinge seat 26 is clamped between the two connecting pieces of the lower hinge seat 15, and the circular hole 21 of the rotating shaft is aligned with the hinge hole 11. Two spring hinge seats 23 are also provided on the upper surface of the manhole cover 20, and circular holes are provided on the spring hinge seats 23 for hinged cooperation with the spring 42 of the opening assistance assembly 40. A handle is also provided on the side of the manhole cover 20, and the position of the handle is opposite to the position of the upper hinge seat 26.

[0033] Since the manhole cover 20 is heavy, it is quite laborious to open it manually, so an opening aid assembly 40 is provided. Figure 4As shown, the opening assistance assembly 40 includes a rotating shaft 41 and a steel pipe 46 parallel to the rotating shaft 41. The rotating shaft 41 passes through the hinge hole 11 on the lower hinge seat 15 and the rotating shaft circular hole 21 on the upper hinge seat 26 in sequence. The two ends of the rotating shaft 41 are respectively sleeved with springs 42. The spring 42 adopts a torsion spring. By changing the angles of the two ends of the torsion spring, the torsion spring can be compressed or stretched accordingly. The end of the spring 42 close to the other spring 42 is tilted outward to form a hinge part 48. The hinge part 48 penetrates into the circular hole on the spring hinge seat 23 and is fixed by the spring hinge seat 23. Two inner end covers 43 are also sleeved on the rotating shaft 41 to limit the end where the hinge part 48 of the spring 42 is located; the end of the spring 42 away from the other spring 42 extends outward to form a fixing part 47. The end sleeve of the fixed part 47 of the rotating shaft 41 is provided with an outer end cover 44, and the outer end cover 44 is provided with a protrusion at one end facing the spring 42, and the protrusion is clamped in the inner circle of the spring. A nut 45 is also provided on the outer end cover 44, which is fixed to the end of the rotating shaft 41 and is used to fasten the outer end cover 44 and the spring 42. The steel pipe 46 of the auxiliary opening component 40 passes through the hinge circular hole 13 of the lower hinge seat 15 and is installed in the lower hinge seat 15. The fixed parts 47 of the two springs 42 are respectively inserted into the steel pipe 46 from both ends. In this embodiment, the length of each fixed part 47 inserted into the steel pipe 46 is 20 mm, which ensures that the fixed part 47 will not slip from the steel pipe 46, and at the same time, it will not be too long to increase the difficulty of installation. The hinged parts 48 and the fixed parts 47 at both ends of the spring 42 are fixed. When the manhole cover is opened or closed, the angles of the hinged parts 48 and the fixed parts 47 change, and the spring 42 is compressed or stretched accordingly.

[0034] like Figure 5 As shown, the fastening assembly 30 includes a nut seat 34 and a fastening bolt 33. The center of the nut seat 34 is provided with a threaded hole, and one end of the fastening bolt 33 is inserted into the threaded hole and connected to the nut seat 34. A fastening bolt pin 31 is inserted into the other end of the fastening bolt 33, and the central axis of the fastening bolt pin 31 is perpendicular to the central axis of the fastening bolt 33. A screw 32 is also provided on the fastening bolt 33, which passes through the fastening bolt 33 and the fastening bolt pin 31 at the same time to fix the two. The direction of the screw 32, the direction of the central axis of the fastening bolt pin 31, and the direction of the central axis of the fastening bolt 33 are perpendicular to each other. Both ends of the fastening bolt pin 31 are inserted into the bolt seat holes of the bolt seat 14 for fixing.

[0035] Working process: When the manhole cover 20 is completely closed, Figure 6As shown, the nut seat 34 of the fastening assembly 30 faces upward, and the fastening bolt 33 is clamped in the clamping seat 24. The end face of the nut seat 34 is in close contact with the end face of the clamping seat 24, and the nut stopper 25 on the clamping seat 24 is tilted upward, which blocks the nut seat 34 and prevents the fastening bolt 33 from loosening due to harsh working conditions such as vibration during operation of the vehicle, and the fastening assembly 30 from falling out of the manhole cover 20. When it is necessary to open the manhole cover 20, first rotate the loose nut seat 34, and the nut seat 34 and the fastening bolt 33 are relatively separated by a distance, so that the end face of the nut seat 34 is no longer in close contact with the end face of the clamping seat 24. The fastening assembly 30 can then be rotated downward around the fastening bolt pin 31 to separate the nut seat 34 from the clamping seat 24, as shown in FIG. Figure 7 As shown. When the manhole cover 20 is closed, the spring 42 in the opening assistance assembly 40 is in a compressed state and has a certain elastic force. When opening the manhole cover 20, the staff holds the handle on the manhole cover 20 and only needs to apply a small force to make the manhole cover 20 act on the elastic force and slowly open around the rotating shaft 41. As the opening angle of the manhole cover 20 increases, the elastic force of the spring 42 is slowly released. When the manhole cover 20 exceeds a certain angle, the elastic force is completely released, and the spring 42 is in a free state. At this time, the manhole cover 20 applies part of its gravity to the spring 42 due to gravity factors. The staff continues to apply a downward pulling force to the manhole cover 20, so that the manhole cover 20 continues to unfold until the crossbeam 12 of the lower hinge seat 15 abuts against the stop boss 22 of the upper hinge seat 26, and the manhole cover 20 reaches the maximum opening angle. The maximum opening angle of the manhole cover 20 is not less than 150°. Figure 8 As shown. During the opening process of the manhole cover 20, the rotating shaft 41 slides down from the middle of the long hinge hole 11 to the bottom, and then slides to the upper part; during the closing process of the manhole cover 20, the rotating shaft 41 slides from the upper part to the lower part, and then slides to the middle part of the hinge hole 11. During the closing process, there is no jamming between the stop boss 22 of the manhole cover 20 and the crossbeam 12 on the manhole seat 10.

Claims

1. A manhole device for a railway tank car, characterized in that: It comprises a manhole seat (10) and a manhole cover (20), wherein the manhole seat (10) is connected to the manhole cover (20) via an opening assistance component (40) and a fastening component (30); A lower hinge seat (15) is arranged on the upper side of the manhole seat (10), and the lower hinge seat (15) includes two opposite connecting plates, and a hinge circular hole (13) is arranged on the side of each connecting plate close to the manhole seat (10), and a hinge hole (11) is arranged on the side away from the manhole seat (10), and the hinge hole (11) is in the shape of an elongated strip, and its length direction is vertically arranged; a cross beam (12) is also arranged between the two connecting plates, and the cross beam (12) is located below the two hinge holes (11); a plurality of bolt seats (14) distributed along the circumference are also arranged on the upper side of the manhole seat (10); The side of the manhole cover (20) is provided with an upper hinge seat (26) installed between two connecting pieces of the lower hinge seat (15); the upper hinge seat (26) extends radially outward, and the upper surface of the upper hinge seat (26) is provided with a stop boss (22); the two side surfaces of the upper hinge seat (26) are respectively provided with rotating shaft circular holes (21) corresponding to the hinge holes (11); the side of the manhole cover (20) is also provided with a plurality of clamping seats (24) corresponding to the positions of the plurality of bolt seats (14); two spring hinge seats (23) are provided on the upper surface of the manhole cover (20) near the upper hinge seat (26); the stop boss (22) is used to abut against the crossbeam (12) when the manhole cover is fully opened; The opening assistance component (40) comprises a rotating shaft (41) inserted into the rotating shaft circular hole (21) and the hinge hole (11), two springs (42) respectively sleeved on the two ends of the rotating shaft (41), and a steel pipe (46) parallel to the rotating shaft (41); the two ends of the two springs (42) close to each other are respectively provided with hinge parts (48), and the two hinge parts (48) are respectively inserted into two spring hinge seats (23); the other ends of the two springs (42) are both provided with fixing parts (47), and the two fixing parts (47) are connected to the two ends of the steel pipe (46), and the steel pipe (46) is inserted into the hinge circular hole (13); the spring (42) is used to be compressed when the manhole cover is closed, and the elastic force is released when the manhole cover is opened so that the manhole cover (20) rotates around the rotating shaft (41); The fastening assembly (30) is used to connect one end to the bolt seat (14) and to clamp the other end in the clamping seat (24) when the manhole cover (20) is closed.

2. A manhole device for a railway tank car according to claim 1, characterized in that: The fastening assembly (30) comprises a nut seat (34) and a fastening bolt (33). A threaded hole is provided at the center of the nut seat (34). One end of the fastening bolt (33) is inserted into the threaded hole, and a fastening bolt pin (31) perpendicular to the fastening bolt (33) is inserted into the other end. The fastening bolt (33) and the fastening bolt pin (31) are connected via a screw (32), and the fastening bolt pin (31) is connected to the bolt seat (14). When the manhole cover (20) is closed, the fastening bolt (33) is clamped in the clamping seat (24), and the nut seat (34) is pressed against the upper end of the clamping seat (24).

3. A manhole device for a railway tank car according to claim 2, characterized in that: The bolt seat (14) comprises two opposite fixing plates, on which bolt seat holes are arranged; and the two ends of the fastening bolt pin (31) are respectively inserted into the two bolt seat holes.

4. A manhole device for a railway tank car according to claim 2, characterized in that: The clamping seat (24) comprises two opposing clamping arms for clamping the fastening bolts (33) of the fastening assembly (30); the outer ends of the clamping arms are provided with nut stops (25) for preventing the nut seat (34) from sliding on the clamping seat (24).

5. A manhole device for a railway tank car according to any one of claims 1 to 4, characterized in that: The rotating shaft (41) is provided with two inner end covers (43) for limiting the ends where the hinged parts (48) of the two springs (42) are located; the rotating shaft (41) is also provided with two outer end covers (44), which are respectively fixed at two ends of the rotating shaft (41) and are respectively used to limit the ends where the fixed parts (47) of the two springs (42) are located.

6. A manhole device for a railway tank car according to claim 5, characterized in that: A circular hole is provided on the spring hinge seat (23), and the hinge portion (48) of the spring (42) is inserted into the corresponding circular hole.

7. A manhole device for a railway tank car according to claim 6, characterized in that: The manhole cover (20) is also provided with a handle, which is located on the side of the manhole cover (20) at a position opposite to the upper hinge seat (26).

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