Inwards-opened manhole for high-pressure steam pocket end socket

Abstract

The utility model relates to the technical field of manholes, and discloses an internally-opened manhole for high-pressure steam pocket end sockets, which comprises a manhole cover plate, a high-pressure steam pocket main body is arranged on one side of the manhole cover plate, and end sockets are arranged at two ends of the high-pressure steam pocket main body; an opening and closing assembly is arranged on one side of the manhole cover plate, and a prompting assembly is arranged on one side of the opening and closing assembly; the opening and closing assembly comprises a hanging seat and a pressing plate, a bolt is inserted into one side of the pressing plate, rotation motion is converted into sliding rotation motion through the mechanical lever principle, namely, the hinging effect of a first connecting rod and a second connecting rod, the direct operation requirement of an operator for a heavy object is greatly lowered, and the operation safety and feasibility are improved; the manhole cover plate is opened in a sliding and rotating mode instead of a traditional rotating mode, opening difficulty caused by insufficient space is avoided, the pressing plate is fixed or released by simply rotating the nut and the bolt, then opening and closing of the manhole cover plate are controlled, the operation process is simple, convenient and rapid, and complexity and time cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of manholes, in particular to an inwards-opening manhole for a high-pressure steam drum head. Background Art

[0002] A manhole refers to an opening structure for personnel to enter and exit equipment for installation, maintenance, and safety inspection. It mainly consists of a short cylinder section, a flange, and a manhole cover with a handle. The concept of a steam drum refers to the pressure drop or rise caused by water circulation in the air pressure, or it can be understood that the steam drum is the pressure change formed by the fusion of gas and water. The air and water molecules in the ultimate pressure will cause the gas pressure to rise, resulting in the pressure concentration molecules generated after the high pressure reaches a certain value.

[0003] In the daily maintenance and repair of pressure vessels such as high-pressure steam drums, the opening and closing of manholes are indispensable links. Traditional high-pressure steam drum manholes mostly adopt a rotary opening method. However, in the case of limited internal space of the high-pressure steam drum and heavy manhole cover plate, this method has problems such as difficult operation, large safety hazards, and low efficiency. Especially when the internal pressure of the high-pressure steam drum is relatively high, directly rotating and opening the manhole cover plate weighing hundreds of kilograms is not only laborious but also may cause accidents due to improper operation. Therefore, an inwards-opening manhole for a high-pressure steam drum head is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide an inwards-opening manhole for a high-pressure steam drum head to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An inwards-opening manhole for a high-pressure steam drum head, including a manhole cover plate, one side of the manhole cover plate is provided with a high-pressure steam drum body, and both ends of the high-pressure steam drum body are provided with heads;

[0006] One side of the manhole cover plate is provided with an opening and closing assembly, and one side of the opening and closing assembly is provided with a prompting assembly;

[0007] The opening and closing assembly includes a hanging seat and a pressing plate. One side of the pressing plate is inserted with a bolt, and the outside of the bolt is threadedly connected with a nut located outside the pressing plate. One side of the hanging seat is hinged with a second connecting rod, and one side of the second connecting rod is hinged with a first connecting rod;

[0008] The prompting assembly includes a fixing frame, a chute is opened inside the fixing frame, a sliding plate is slidably connected to the inner side of the chute, and a support rod that movably penetrates through one side of the fixing frame is fixed to one side of the sliding plate.

[0009] Preferably, a support plate is fixed to the outside of the manhole cover plate, and one end of the bolt is fixed to one side of the support plate.

[0010] Preferably, a sealing ring is adhesively bonded to the outer side of the manhole cover plate. The pressing plate is located on the outer side of the head. One side of the hanging seat is fixed to the inner side wall of the head. One end of the first connecting rod is hinged to the inner side of the manhole cover plate.

[0011] Preferably, when the bolt is threadedly connected to the nut, the manhole cover plate is in the closed state. When the bolt is not threadedly connected to the nut, the manhole cover plate moves towards the inner side of the head and is in the open state.

[0012] Preferably, a switch is installed on the inner side wall of the chute on one side of the sliding plate. Limit blocks are fixed to the inner side wall of the chute on both sides of the switch. A through hole is formed on one side of the sliding plate.

[0013] Preferably, a tension spring is sleeved on the outer side of the support rod. Two ends of the tension spring are respectively connected to the inner side walls of the sliding plate and the chute. An indicator light is installed on one side of the pressing plate.

[0014] Preferably, a storage battery is installed on the inner side wall of the pressing plate. The output end of the storage battery is electrically connected to the input end of the switch. The output end of the switch is electrically connected to the input end of the indicator light. One side of the fixing frame is fixed to one side of the inner wall of the pressing plate.

[0015] Compared with the prior art, the present utility model adopts the above technical solutions and has the following technical effects:

[0016] First, through the mechanical lever principle, that is, the hinged action of the first connecting rod and the second connecting rod, the rotational motion is converted into a sliding rotational motion, greatly reducing the direct operation requirement of the operator for heavy objects, improving the safety and feasibility of the operation. The manhole cover plate is opened in a sliding rotational manner instead of the traditional rotational opening, avoiding the difficulty in opening caused by insufficient space. Simply rotating the nut and bolt to fix or release the pressing plate, thereby controlling the opening and closing of the manhole cover plate, making the operation process simple and fast, reducing complexity and time cost.

[0017] Second, when the nut and bolt are tightly threadedly connected and the support rod pushes the sliding plate to touch the switch, the indicator light immediately lights up, providing instant visual feedback to the operator to confirm that the manhole cover plate has been correctly closed and sealed, reducing potential safety hazards caused by negligence or misjudgment. With the light prompt of the indicator light, the operator can be more confident that the manhole cover plate has been safely closed, thus reducing the safety risk caused by not being tightly closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the external structure of the present utility model;

[0020] Figure 2 Front view structural schematic diagram of the pressing plate of the present utility model;

[0021] Figure 3 Right view sectional structural schematic diagram of the manhole cover of the present utility model;

[0022] Figure 4 For the present utility model Figure 3 Schematic diagram of the structure at position A;

[0023] Figure 5 For the present utility model Figure 3 Schematic diagram of the structure at position B.

[0024] Explanation of reference numerals: 1, manhole cover; 2, opening and closing assembly; 21, support plate; 22, first connecting rod; 23, second connecting rod; 24, suspension seat; 25, pressing plate; 26, nut; 27, bolt; 28, sealing ring; 3, prompting assembly; 31, indicator light; 32, fixing frame; 33, limiting block; 34, switch; 35, through hole; 36, sliding plate; 37, tension spring; 38, sliding groove; 39, support rod; 4, head; 5, high-pressure steam drum main body; 6, storage battery. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0026] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions that the present application can be implemented. Therefore, they do not have technical essential meanings. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present application can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in the present application can cover.

[0027] Embodiment

[0028] Please refer to Figures 1-5 , the present utility model provides a technical solution: an inner manhole for a high-pressure steam drum head, including a manhole cover plate 1, a high-pressure steam drum main body 5 is arranged on one side of the manhole cover plate 1, and heads 4 are arranged at both ends of the high-pressure steam drum main body 5;

[0029] An opening and closing assembly 2 is arranged on one side of the manhole cover plate 1, and a prompting assembly 3 is arranged on one side of the opening and closing assembly 2;

[0030] In order to facilitate the opening or closing of the manhole cover plate 1, an opening and closing assembly 2 is provided. The opening and closing assembly 2 includes a hanging seat 24 and a pressing plate 25. A bolt 27 is inserted into one side of the pressing plate 25, and a nut 26 located outside the pressing plate 25 is threadedly connected to the outside of the bolt 27. A second connecting rod 23 is hinged to one side of the hanging seat 24, and a first connecting rod 22 is hinged to one side of the second connecting rod 23. A support plate 21 is fixed to the outside of the manhole cover plate 1, and one end of the bolt 27 is fixed to one side of the support plate 21. When the manhole cover plate 1 is rotated, at this time, under the action of the first connecting rod 22 and the second connecting rod 23, it rotates around the hinge axis respectively, and one side of the pressing plate 25 abuts against the outside of the manhole of the head 4, and at this time, the closing of the manhole cover plate 1 is completed.

[0031] A sealing ring 28 is adhesively bonded to the outside of the manhole cover plate 1. The sealing ring 28 is in close fit with the head 4, effectively preventing the leakage of high-temperature and high-pressure steam in the high-pressure steam drum main body 5, ensuring the safe operation of the equipment, reducing the safety risks caused by leakage. The pressing plate 25 is located outside the head 4, and one side of the hanging seat 24 is fixed to the inner side wall of the head 4. One end of the first connecting rod 22 is hinged to the inside of the manhole cover plate 1. When the bolt 27 is threadedly connected to the nut 26, the manhole cover plate 1 is in the closed state. When the bolt 27 is not threadedly connected to the nut 26, the manhole cover plate 1 moves inward to the inside of the head 4 and is in the open state. When the manhole cover plate 1 is opened inward, the manhole cover plate 1 slides into the high-pressure steam drum main body 5, and the sliding direction is restricted by the first connecting rod 22, the second connecting rod 23 and the hanging seat 24, ensuring smooth opening.

[0032] In order to facilitate the staff to understand the state of the manhole cover plate 1, the prompting assembly 3 includes a fixing frame 32. A chute 38 is opened inside the fixing frame 32. A sliding plate 36 is slidably connected to the inside of the chute 38. A support rod 39 that movably penetrates one side of the fixing frame 32 is fixed to one side of the sliding plate 36. When the pressing plate 25 is installed on one side of the manhole cover plate 1 under the action of the bolt 27 and the nut 26, when the nut 26 is continuously threadedly connected to the bolt 27, the support rod 39 is caused to push the sliding plate 36 to slide inside the chute 38. A switch 34 is installed on the inner side wall of the chute 38 on one side of the sliding plate 36. Limit blocks 33 are fixed to the inner side wall of the chute 38 on both sides of the switch 34. A through hole 35 is opened on one side of the sliding plate 36, and the through hole 35 makes the air pressure on both sides of the sliding plate 36 the same.

[0033] A tension spring 37 is sleeved outside the support rod 39. The two ends of the tension spring 37 are respectively connected to the inner side wall of the slide plate 36 and the chute 38. An indicator light 31 is installed on one side of the pressure plate 25. The slide plate 36 stretches the tension spring 37. When one end of the support rod 39 is flush with the outside of the fixed frame 32, at this time, the support rod 39 just pushes the slide plate 36 to abut against the contact point of the switch 34. A storage battery 6 is installed on the inner side wall of the pressure plate 25. The output end of the storage battery 6 is electrically connected to the input end of the switch 34. The output end of the switch 34 is electrically connected to the input end of the indicator light 31. One side of the fixed frame 32 is fixed to one side of the inner wall of the pressure plate 25. The indicator light 31 generates a light prompt to actively inform the staff that the manhole cover 1 is in the closed state at this time. The storage battery 6 is a rechargeable battery.

[0034] Working principle: When the high-pressure steam drum main body 5 starts to work, only need to rotate the manhole cover 1. At this time, under the action of the first connecting rod 22 and the second connecting rod 23, it rotates around the hinge shaft respectively. Then, the sealing ring 28 on one side of the manhole cover 1 fits against the inner side of the manhole of the head 4. At this time, take the pressure plate 25, pass the bolt 27 through one side of the pressure plate 25, and at the same time use the nut 26 to be threadedly connected to the outside of the bolt 27, so that one side of the pressure plate 25 abuts against the outside of the manhole of the head 4. At this time, the closing of the manhole cover 1 is completed;

[0035] When it is necessary to open the manhole cover 1, only need to loosen the nut 26 to separate the nut 26 and the bolt 27, then remove the pressure plate 25, and push the manhole cover 1 towards the inner side of the head 4 on one side of the high-pressure steam drum main body 5. At this time, the manhole cover 1 can be opened inward. The manhole cover 1 slides towards the inside of the high-pressure steam drum main body 5 and the sliding direction is restricted by the first connecting rod 22, the second connecting rod 23 and the suspension seat 24 to ensure smooth opening. The cooperation of the manhole cover 1 and the opening and closing assembly 2 can adapt to the characteristics of the large pressure and large weight of the manhole of the high-pressure steam drum main body 5, and can solve the problems of limited space and heavy weight of the manhole cover 1 and difficult to rotate and open when opening the high-pressure manhole of the current high-pressure steam drum main body 5.

[0036] When the pressure plate 25 is installed on one side of the manhole cover 1 under the action of the bolt 27 and the nut 26, when the nut 26 is continuously threadedly connected to the bolt 27, the support rod 39 pushes the slide plate 36 to slide inside the chute 38. At this time, the slide plate 36 stretches the tension spring 37. When one end of the support rod 39 is flush with the outside of the fixed frame 32, at this time, the support rod 39 just pushes the slide plate 36 to abut against the contact point of the switch 34, so that the switch 34 is triggered and then the indicator light 31 generates a light prompt to actively inform the staff that the manhole cover 1 is in the closed state at this time.

[0037] In summary, through the mechanical lever principle, that is, the hinge action of the first connecting rod 22 and the second connecting rod 23, the rotational motion is converted into a sliding rotational motion, greatly reducing the direct operation requirements of the operator for heavy objects, improving the safety and feasibility of the operation. The manhole cover 1 is opened in a sliding rotational manner instead of the traditional rotational opening, avoiding the difficulty of opening caused by insufficient space. The simple rotation of the nut 26 and the bolt 27 is used to fix or release the pressing plate 25, thereby controlling the opening and closing of the manhole cover 1, making the operation process simple and fast, reducing complexity and time costs.

[0038] When the support rod 39 pushes the skateboard 36 to touch the switch 34 through the tight threaded connection of the nut 26 and the bolt 27, the indicator light 31 immediately lights up, providing instant visual feedback to the operator to confirm that the manhole cover 1 has been correctly closed and sealed, reducing potential safety hazards caused by negligence or misjudgment. Using the light prompt of the indicator light 31, the operator can be more confident that the manhole cover 1 has been safely closed, thus reducing the safety risk caused by not being tightly closed.

[0039] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. An inner manhole for a high-pressure steam drum head, comprising a manhole cover plate (1), characterized in that: A high-pressure steam drum body (5) is disposed on one side of the manhole cover plate (1), and seal heads (4) are disposed at both ends of the high-pressure steam drum body (5); An opening and closing component (2) is provided on one side of the manhole cover plate (1), and a prompting component (3) is provided on one side of the opening and closing component (2); The opening and closing assembly (2) comprises a hanging seat (24) and a pressing plate (25), a bolt (27) is inserted into one side of the pressing plate (25), the outer side of the bolt (27) is threadedly connected to a nut (26) located on the outer side of the pressing plate (25), a second connecting rod (23) is hingedly connected to one side of the hanging seat (24), and the first connecting rod (22) is hingedly connected to one side of the second connecting rod (23); The prompt component (3) comprises a fixed frame (32), a slide groove (38) is provided inside the fixed frame (32), a slide plate (36) is slidably connected inside the slide groove (38), and a support rod (39) is fixed on one side of the slide plate (36) and movably penetrates one side of the fixed frame (32).

2. The inner manhole for a high-pressure steam drum head according to claim 1, characterized in that: A support plate (21) is fixed to the outside of the manhole cover plate (1), and one end of the bolt (27) is fixed to one side of the support plate (21).

3. The inner manhole for a high-pressure steam drum head according to claim 2, characterized in that: A sealing ring (28) is bonded to the outside of the manhole cover (1), the pressure plate (25) is located on the outside of the sealing head (4), one side of the hanging seat (24) is fixed to the inner wall of the sealing head (4), and one end of the first connecting rod (22) is hinged to the inner side of the manhole cover (1).

4. The inner manhole for a high-pressure steam drum head according to claim 3, characterized in that: When the bolt (27) is threadedly connected to the nut (26), the manhole cover (1) is in a closed state; when the bolt (27) is not threadedly connected to the nut (26), the manhole cover (1) moves toward the inside of the sealing head (4) and is in an open state.

5. The inner manhole for a high-pressure steam drum head according to claim 1, characterized in that: A switch (34) located on one side of the slide plate (36) is installed on the inner side wall of the slide groove (38), and limit blocks (33) located on both sides of the switch (34) are fixed to the inner side wall of the slide groove (38), and a through hole (35) is opened on one side of the slide plate (36).

6. The inner manhole for a high-pressure steam drum head according to claim 5, characterized in that: A tension spring (37) is sleeved on the outer side of the support rod (39), and the two ends of the tension spring (37) are respectively connected to the inner side wall of the slide plate (36) and the slide groove (38), and an indicator light (31) is installed on one side of the pressure plate (25).

7. The inner manhole for a high-pressure steam drum head according to claim 6, characterized in that: A storage battery (6) is installed on the inner wall of the pressing plate (25), the output end of the storage battery (6) is electrically connected to the input end of the switch (34), the output end of the switch (34) is electrically connected to the input end of the indicator light (31), and one side of the fixing frame (32) is fixed to one side of the inner wall of the pressing plate (25).

Images