Pressure relief mechanism of high-pressure boiler

Abstract

The utility model relates to the technical field of mechanical engineering, and discloses a pressure relief mechanism of a high-pressure boiler, which comprises a pressure relief component. Comprising a cast steel valve body connected to the upper end of a pressure relief valve body, a valve head connected to the top of the cast steel valve body, a hollow cavity formed in an inner cavity of the cast steel valve body, an air cylinder arranged at the top of the hollow cavity, a push rod connected to the output end of the air cylinder, circular plates arranged at the two ends of the outer side wall of the push rod and compression springs arranged on the opposite sides of the circular plates. The plugging plate is connected to the bottom end of the push rod; and the pressure gauges are arranged on two sides of the pressure release valve body. The utility model solves the problems that the abnormal water circulation in the boiler is possibly caused under the condition that the water level of the pressure relief mechanism of the high-pressure boiler is improperly controlled, the pressure in the boiler cannot be timely and effectively released, or the boiler is possibly damaged in the pressure release process.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to a pressure relief mechanism for a high-pressure boiler. Background Art

[0002] A high-pressure boiler refers to a boiler with a design pressure greater than or equal to 10 bar, which is generally used in large power station equipment, such as nuclear power plants, large thermal power plants, etc. High-pressure boilers require strict control of parameters such as water circulation, temperature and pressure to ensure safe and stable operation. The high-pressure boiler pressure relief mechanism is an important part of the safety control of high-pressure boilers. By releasing the pressure in the boiler in time, it prevents accidents such as explosions caused by excessive pressure. In the prior art, the high-pressure boiler pressure relief mechanism used usually adopts a mechanical or hydraulic design, but these designs may cause abnormal water circulation in the boiler in the event of improper water level control, and the pressure in the boiler cannot be released in time and effectively, or the boiler may be damaged during the pressure release process. Therefore, a new type of high-pressure boiler pressure relief mechanism is needed that can control the pressure in the boiler more safely and effectively. Utility Model Content

[0003] The utility model aims to provide a high-pressure boiler pressure relief mechanism to solve the problem that improper water level control in the high-pressure boiler pressure relief mechanism in the above-mentioned background technology may cause abnormal water circulation in the boiler, fail to release the pressure in the boiler in a timely and effective manner, or may cause damage to the boiler during the pressure release process.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure boiler pressure relief mechanism, comprising a valve body assembly, wherein the valve body assembly comprises a pressure relief valve body, a connecting pipe connected to one end of the pressure relief valve body, a pressure relief pipe arranged at one end of the pressure relief valve body away from the connecting pipe, and a pressure relief assembly arranged in the inner cavity of the pressure relief valve body;

[0005] The pressure relief assembly includes a cast steel valve body connected to the upper end of the pressure relief valve body, a valve head connected to the top of the cast steel valve body, a hollow chamber opened in the inner cavity of the cast steel valve body, a cylinder arranged at the top of the hollow chamber, a push rod connected to the output end of the cylinder, circular plates arranged at both ends of the outer wall of the push rod, a compression spring arranged on the opposite side of the circular plate, a sealing plate connected to the bottom end of the push rod and pressure gauges arranged on both sides of the pressure relief valve body.

[0006] Preferably, two circular plates are provided, the outer side walls of the circular plates are in contact with the inner side walls of the cast steel valve body, and the compression spring is provided on the periphery of the push rod.

[0007] Preferably, a fixing block is fixedly connected to the upper end of the pressure relief pipe and the connecting pipe, and bolts are rotatably connected to both sides of the inner cavity of the fixing block.

[0008] Preferably, a first chamber and a second chamber are provided on both sides of the inner cavity of the pressure relief valve body, the first chamber and the second chamber are configured identically, and the blocking plate is located at the connection between the first chamber and the second chamber.

[0009] Preferably, a connecting groove is provided in the inner cavity of the pressure relief valve body, and the blocking plate is plugged into the connecting groove.

[0010] Preferably, a mounting plate is provided at the connection between the pressure relief valve body and the cast steel valve body, and the pressure relief valve body and the cast steel valve body are interpenetratingly arranged.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a pressure relief component, and further detects the pressure by utilizing pressure gauges provided on both sides of the pressure relief valve body. According to the data, the cylinder can be controlled to lift and lower the push rod, so that the sealing plate connected to the bottom of the push rod can control the release of the pressure. The first chamber and the second chamber at both ends can penetrate after the sealing plate leaves the connecting groove, so as to quickly release the pressure in the boiler. After reaching the standard value, the cylinder can push the push rod to seal the sealing plate, so as to control the pressure in the boiler more safely and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-pressure boiler pressure relief mechanism of the utility model;

[0014] Figure 2 This is a structural analysis diagram of a pressure relief component of a high-pressure boiler pressure relief mechanism of the utility model;

[0015] Figure 3 The utility model is a schematic diagram of the connecting groove structure of a high-pressure boiler pressure relief mechanism.

[0016] In the figure: 1. pressure relief valve body; 2. pressure relief pipe; 3. fixing block; 4. bolt; 5. cast steel valve body; 6. valve head; 7. pressure gauge; 8. connecting pipe; 9. first chamber; 10. second chamber; 11. cylinder; 12. round plate; 13. push rod; 14. compression spring; 15. hollow chamber; 16. sealing plate; 17. connecting groove. DETAILED DESCRIPTION

[0017] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0018] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0020] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0021] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0022] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below with reference to the accompanying drawings.

[0023] Example: Refer to Figure 1-Figure 3 The utility model provides a high-pressure boiler pressure relief mechanism including a valve body assembly, the valve body assembly including a pressure relief valve body 1, a connecting pipe 8 connected to one end of the pressure relief valve body 1, a pressure relief pipe 2 arranged at one end of the pressure relief valve body 1 away from the connecting pipe 8, and a pressure relief assembly arranged in the inner cavity of the pressure relief valve body 1;

[0024] The pressure relief assembly includes a cast steel valve body 5 connected to the upper end of the pressure relief valve body 1, a valve head 6 connected to the top of the cast steel valve body 5, a hollow chamber 15 opened in the inner cavity of the cast steel valve body 5, a cylinder 11 arranged at the top of the hollow chamber 15, a push rod 13 connected to the output end of the cylinder 11, circular plates 12 arranged at both ends of the outer side wall of the push rod 13, a compression spring 14 arranged on the opposite side of the circular plate 12, a blocking plate 16 connected to the bottom end of the push rod 13 and a pressure gauge 7 arranged on both sides of the pressure relief valve body 1.

[0025] There are two circular plates 12 , the outer wall of the circular plate 12 is in contact with the inner wall of the cast steel valve body 5 , and the compression spring 14 is arranged on the outer periphery of the push rod 13 .

[0026] Wherein: the upper ends of the pressure relief pipe 2 and the connecting pipe 8 are fixedly connected with a fixing block 3, and both sides of the inner cavity of the fixing block 3 are rotatably connected with bolts 4.

[0027] Wherein: a first chamber 9 and a second chamber 10 are provided on both sides of the inner cavity of the pressure relief valve body 1 , the first chamber 9 and the second chamber 10 are configured identically, and a blocking plate 16 is located at the connection between the first chamber 9 and the second chamber 10 .

[0028] Wherein: a connecting groove 17 is provided in the inner cavity of the pressure relief valve body 1, and the blocking plate 16 is plugged into the connecting groove 17.

[0029] Wherein: a mounting plate is provided at the connection between the pressure relief valve body 1 and the cast steel valve body 5, and the pressure relief valve body 1 and the cast steel valve body 5 are interpenetratingly arranged.

[0030] Working principle of the embodiment of the utility model: This high-pressure boiler pressure relief mechanism, when in use, connects one end of the connecting pipe 8 to the high-pressure boiler. When pressure relief is required in the case of improper water level control, the bolt 4 is used to fix the connecting pipe 8 with the pressure relief pipe 2 and the pressure relief valve body 1 relative to each other through the fixing block 3. The pressure gauge 7 on one side of the boiler can detect the pressure value. When the pressure value reaches the set range, its signal end can be transmitted to the cylinder 11. Under the action of the cylinder 11, the push rod 13 at the output end is pushed, so that the push rod 13 drives the circular plate 12 at the upper end to shrink downward. When the piston moves closer to the other side circular plate 12 and the internal compression spring 14 is in a compressed state, the push rod 13 can be driven to move upward, and the sealing plate 16 arranged at the bottom of the push rod 13 can be moved upward, so that the first chamber 9 and the second chamber 10 in the pressure relief valve body 1 can be relatively penetrated, and the pressure relief work can be completed. The pressure gauge 7 arranged at the other end can ensure that the push rod 13 can be moved downward after the internal pressure value tends to be stable, so that the sealing plate 16 at the bottom can be plugged into the connecting groove 17, and the sealing process can be completed, and the operation can be completed.

[0031] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-pressure boiler pressure relief mechanism, characterized in that: include: A valve body assembly, the valve body assembly comprising a pressure relief valve body (1), a connecting pipe (8) connected to one end of the pressure relief valve body (1), a pressure relief pipe (2) arranged at one end of the pressure relief valve body (1) away from the connecting pipe (8), and a pressure relief assembly arranged in the inner cavity of the pressure relief valve body (1); A pressure relief assembly comprises a cast steel valve body (5) connected to the upper end of a pressure relief valve body (1), a valve head (6) connected to the top of the cast steel valve body (5), a hollow chamber (15) opened in the inner cavity of the cast steel valve body (5), a cylinder (11) arranged at the top of the hollow chamber (15), a push rod (13) connected to the output end of the cylinder (11), circular plates (12) arranged at both ends of the outer wall of the push rod (13), a compression spring (14) arranged on the opposite side of the circular plate (12), a blocking plate (16) connected to the bottom end of the push rod (13), and pressure gauges (7) arranged on both sides of the pressure relief valve body (1).

2. A high pressure boiler pressure relief mechanism according to claim 1, characterized in that: Two circular plates (12) are arranged, the outer wall of the circular plate (12) is in contact with the inner wall of the cast steel valve body (5), and the compression spring (14) is arranged on the periphery of the push rod (13).

3. A high pressure boiler pressure relief mechanism according to claim 1, characterized in that: The pressure relief pipe (2) and the upper end of the connecting pipe (8) are fixedly connected with a fixing block (3), and bolts (4) are rotatably connected to both sides of the inner cavity of the fixing block (3).

4. A high pressure boiler pressure relief mechanism according to claim 1, characterized in that: A first chamber (9) and a second chamber (10) are provided on both sides of the inner cavity of the pressure relief valve body (1); the first chamber (9) and the second chamber (10) are configured identically; and the blocking plate (16) is located at the connection between the first chamber (9) and the second chamber (10).

5. A high pressure boiler pressure relief mechanism according to claim 1, characterized in that: The inner cavity of the pressure relief valve body (1) is provided with a connecting groove (17), and the blocking plate (16) is plugged into the connecting groove (17).

6. A high pressure boiler pressure relief mechanism according to claim 1, characterized in that: A mounting plate is provided at the connection between the pressure relief valve body (1) and the cast steel valve body (5), and the pressure relief valve body (1) and the cast steel valve body (5) are interpenetratingly arranged.

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