CN220980578U

CN220980578U - Safety valve for boiler of thermal power plant

Info

Publication number: CN220980578U
Application number: CN202321519656.5U
Authority: CN
Inventors: 易静波; 任智勇
Original assignee: Changsha Changzhi Electrical Co ltd
Current assignee: Changsha Changzhi Electrical Co ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2024-05-17
Anticipated expiration: 2033-06-14

Abstract

The utility model belongs to the technical field of safety valves, and particularly relates to a safety valve for a boiler of a thermal power plant, which comprises a valve body, wherein a fixed pipe is fixedly connected to the valve body, a connecting pipe is sleeved on the outer side of the fixed pipe in a sliding manner, a limiting sleeve is rotationally connected to the outer side of the fixed pipe, the limiting sleeve is connected with the connecting pipe through threads, a bump is fixedly connected to the fixed pipe, an installation box is fixedly connected to the valve body, a pull plate is contacted to the installation box, a clamping rod is fixedly connected to the pull plate, and a limiting groove is formed in the limiting sleeve. The utility model can make the limit sleeve and the connecting pipe perform screw thread movement by rotating the limit sleeve when the connecting pipe is spliced with the fixed pipe by arranging the limit sleeve, the bump and other parts, thereby making the limit sleeve perform limit function on the connecting pipe, keeping the connecting pipe stable when the connecting pipe is spliced with the fixed pipe, and solving the problem of unstable splicing of the fixed pipe and the connecting pipe when the safety valve is used.

Description

Safety valve for boiler of thermal power plant

Technical Field

The utility model relates to the technical field of safety valves, in particular to a safety valve for a boiler of a thermal power plant.

Background

The boiler safety valve is a valve arranged at the top of the boiler near the cab end in order to prevent the pressure in the boiler from exceeding the specified pressure. When the pressure in the boiler exceeds the preset pressure, the safety valve is automatically opened, steam in the boiler is discharged, the pressure is reduced, and when the pressure is reduced to the preset pressure, the safety valve is automatically closed, and the steam discharge and the pressure reduction are stopped. At least two safety valves are arranged on the novel steam locomotive to ensure the safety of the boiler. The utility model discloses a boiler safety valve according to the utility model of patent grant publication number CN213393711U, which comprises a valve body, an air pressure storage box is fixedly arranged at the top of the valve body, an overlapped lantern ring is fixedly arranged in an inner cavity of the air pressure storage box, a lower layer fixing plate is fixedly arranged at the top of the air pressure storage box, an upper layer fixing plate is fixedly arranged at the top of the lower layer fixing plate, and fixing bolts are fixedly arranged around the top of the upper layer fixing plate. The sealing rubber ring is clamped in the inner cavity of the groove through the convex blocks, so that a good sealing effect can be achieved, equipment damage caused by steam pressure leakage is prevented, the fixing bolt has a good connection effect on the upper layer fixing plate and the lower layer fixing plate, the installation and the disassembly are convenient, the sealing rubber ring has a good sealing effect on the flange connection position, and the integral sealing performance is improved. The utility model solves the problems of low tightness, difficult installation and disassembly, complicated steps and reduced service life of the common boiler safety valve in the market. When the safety valve is used, the fixed pipe is not stably spliced with the connecting pipe, and the connecting pipe is loosened when the pressure is too high, so that steam leakage is caused.

Disclosure of utility model

The utility model aims to provide a safety valve for a boiler of a thermal power plant, which solves the problems that when the safety valve is used, a fixed pipe is not stably spliced with a connecting pipe, and when the pressure is too high, the connecting pipe is loosened, so that steam leaks.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a relief valve for boiler of thermal power plant, includes the valve body, fixedly connected with fixed pipe on the valve body, the connecting pipe has been cup jointed in the outside slip of fixed pipe, the outside of fixed pipe is rotated and is connected with the stop collar, the stop collar passes through threaded connection with the connecting pipe, fixedly connected with lug on the fixed pipe, fixedly connected with mounting box on the valve body, the contact has the arm-tie on the mounting box, fixedly connected with draw-bar on the arm-tie, the spacing groove has been seted up on the stop collar, fixedly connected with slide bar on the arm-tie, fixedly connected with stop collar on the mounting box, the outside of slide bar is provided with the spring.

Preferably, the limiting sleeve is provided with a ring groove, the inside of the ring groove is connected with a lug in a sliding manner, and the limiting sleeve can be limited by matching with the lug through the design of the ring groove.

Preferably, the inside sliding connection of installation box has the draw-in bar, the inside sliding connection of spacing groove has the draw-in bar, through the design of draw-in bar, can play spacing effect to the stop collar.

Preferably, the number of the limiting grooves is multiple, the limiting grooves are annularly distributed on the limiting sleeve, and the limiting sleeve can be limited by matching with the clamping rod through the design of the limiting grooves.

Preferably, the inside sliding connection of spacing ring has the slide bar, the inside sliding connection of mounting box has the slide bar, through the design of slide bar, can make the spring drive the arm-tie removal.

Preferably, one end of the spring is contacted with the sliding rod, the other end of the spring is contacted with the limiting ring, and the clamping rod can be driven to limit the limiting sleeve through the design of the spring.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model can make the limit sleeve and the connecting pipe perform screw thread movement by rotating the limit sleeve when the connecting pipe is spliced with the fixed pipe by arranging the limit sleeve, the bump and other parts, thereby making the limit sleeve perform limit function on the connecting pipe, keeping the connecting pipe stable when the connecting pipe is spliced with the fixed pipe, and solving the problem of unstable splicing of the fixed pipe and the connecting pipe when the safety valve is used.

2. The utility model can lead the spring to drive the clamping rod to slide into the limit groove on the limit sleeve by arranging the components such as the mounting box, the clamping rod, the limit groove, the spring and the like, so that the clamping rod can limit the limit sleeve, the limit sleeve can keep stable when limiting the connecting pipe, and the connecting pipe and the fixed pipe are more stable after being spliced.

Drawings

FIG. 1 is a perspective view of the overall structure of the present utility model;

FIG. 2 is a front cross-sectional view of FIG. 1 of the present utility model;

FIG. 3 is a side cross-sectional view of FIG. 1 of the present utility model;

FIG. 4 is an enlarged view of the structure of portion A in FIG. 2 according to the present utility model;

fig. 5 is an enlarged view of the B-section structure in fig. 3 according to the present utility model.

In the figure: 1. a valve body; 2. a fixed tube; 3. a connecting pipe; 4. a limit sleeve; 41. a bump; 42. a ring groove; 5. a mounting box; 51. pulling a plate; 52. a clamping rod; 53. a limit groove; 54. a slide bar; 55. a limiting ring; 56. and (3) a spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, a safety valve for a boiler of a thermal power plant comprises a valve body 1, wherein a fixed pipe 2 is fixedly connected to the valve body 1, a connecting pipe 3 is sleeved on the outer side of the fixed pipe 2 in a sliding manner, a limit sleeve 4 is rotatably connected to the outer side of the fixed pipe 2, the limit sleeve 4 is in threaded connection with the connecting pipe 3, a bump 41 is fixedly connected to the fixed pipe 2, a ring groove 42 is formed in the limit sleeve 4, a bump 41 is slidably connected to the inside of the ring groove 42, and the bump 41 can be matched to limit the limit sleeve 4 through the design of the ring groove 42.

Referring to fig. 2-5, the valve body 1 is fixedly connected with a mounting box 5, the mounting box 5 is contacted with a pull plate 51, clamping rods 52 are fixedly connected to the pull plate 51, limit grooves 53 are formed in the limit sleeve 4, the number of the limit grooves 53 is multiple, the limit grooves 53 are distributed on the limit sleeve 4 in a ring shape, the limit sleeve 4 can be limited by matching with the clamping rods 52 through the design of the limit grooves 53, the clamping rods 52 are connected with the mounting box 5 in a sliding manner, the clamping rods 52 are connected with the inside of the limit grooves 53 in a sliding manner, and the limit sleeve 4 can be limited through the design of the clamping rods 52.

Referring to fig. 2-5, a sliding rod 54 is fixedly connected to the pull plate 51, a limiting ring 55 is fixedly connected to the mounting box 5, a sliding rod 54 is slidably connected to the inside of the limiting ring 55, the sliding rod 54 is slidably connected to the inside of the mounting box 5, the spring 56 can drive the pull plate 51 to move through the design of the sliding rod 54, a spring 56 is arranged on the outer side of the sliding rod 54, one end of the spring 56 is in contact with the sliding rod 54, the other end of the spring 56 is in contact with the limiting ring 55, and the clamping rod 52 can be driven to limit the limiting sleeve 4 through the design of the spring 56.

The specific implementation process of the utility model is as follows: when the fixing device is used, the pull plate 51 drives the clamping rod 52 to slide out of the limit groove 53 on the limit sleeve 4 by moving the pull plate 51 in the direction away from the mounting box 5, the pull plate 51 drives the sliding rod 54 to slide in the limit ring 55, the sliding rod 54 extrudes the spring 56, then the connecting pipe 3 and the fixing pipe 2 are spliced, the limit sleeve 4 is rotated, the limit sleeve 4 and the connecting pipe 3 are in threaded movement, the limit sleeve 4 limits the connecting pipe 3, the pull plate 51 is released, the elastic force of the spring 56 drives the sliding rod 54 to reset, the sliding rod 54 drives the pull plate 51 to reset, the pull plate 51 drives the clamping rod 52 to slide into the limit groove 53 on the limit sleeve 4 again, the limit sleeve 4 is limited, and the connecting pipe 3 and the fixing pipe 2 can be stably spliced.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a relief valve for boiler of thermal power plant, includes valve body (1), its characterized in that: fixed pipe (2) of fixedly connected with on valve body (1), connecting pipe (3) have been cup jointed in the outside slip of fixed pipe (2), the outside of fixed pipe (2) is rotated and is connected with stop collar (4), stop collar (4) pass through threaded connection with connecting pipe (3), fixedly connected with lug (41) on fixed pipe (2), fixedly connected with mounting box (5) on valve body (1), contact has arm-tie (51) on mounting box (5), fixedly connected with draw-bar (52) on arm-tie (51), limit groove (53) have been seted up on stop collar (4), fixedly connected with slide bar (54) on arm-tie (51), fixedly connected with stop collar (55) on mounting box (5), the outside of slide bar (54) is provided with spring (56).

2. The safety valve for a boiler of a thermal power plant according to claim 1, wherein: the limiting sleeve (4) is provided with a ring groove (42), and a lug (41) is connected inside the ring groove (42) in a sliding mode.

3. The safety valve for a boiler of a thermal power plant according to claim 1, wherein: the inside sliding connection of mounting box (5) has draw-in bar (52), the inside sliding connection of spacing groove (53) has draw-in bar (52).

4. The safety valve for a boiler of a thermal power plant according to claim 1, wherein: the number of the limiting grooves (53) is multiple, and the limiting grooves (53) are annularly distributed on the limiting sleeve (4).

5. The safety valve for a boiler of a thermal power plant according to claim 1, wherein: the inside sliding connection of spacing ring (55) has slide bar (54), the inside sliding connection of mounting box (5) has slide bar (54).

6. The safety valve for a boiler of a thermal power plant according to claim 1, wherein: one end of the spring (56) is contacted with the slide rod (54), and the other end of the spring (56) is contacted with the limiting ring (55).