End socket for boiler pressure vessel

Abstract

The utility model discloses an end socket for a boiler pressure vessel, relates to the field of end sockets for pressure vessels, and aims to solve the problem that the boiler pressure vessel is easy to explode when the high-pressure state in the boiler pressure vessel is not controlled stably because the existing end socket for the boiler pressure vessel in the prior art is not provided with a pressure relief mechanism. A pressure container is fixedly connected to the lower end of the end socket, a pressure relief hole is formed in one side of the middle of the end socket, an annular connecting piece is fixedly arranged at the upper end of the pressure relief hole, a pressure relief mechanism is fixedly connected to the upper end of the annular connecting piece and comprises a pressure relief pipe and a piston, and a plurality of exhaust holes are formed in the lower end of one side of the pressure relief pipe. The piston is arranged at the lower end of the interior of the pressure relief pipe, an internal thread sleeve is fixedly connected to the middle of the upper end of the piston, a screw is arranged at the upper end of the interior of the internal thread sleeve, and a transmission box used for driving the screw to rotate is fixedly connected to the upper end of the pressure relief pipe.

Description

Technical Field

[0001] The utility model relates to the field of pressure vessel heads, and specifically relates to a head for a boiler pressure vessel. Background Technique

[0002] A pressure vessel head is a component used to close the end of a container to isolate the internal and external media, also known as an end cover. The head is a main pressure-bearing component on a pressure vessel, and its function is to seal. It is usually used for the upper and lower bottoms of a tank-shaped pressure vessel or the end of a pipeline, and seals the pipe by welding. According to different geometric shapes, the heads can be divided into various types such as spherical, elliptical, dish-shaped, and conical. These different types of heads play a crucial role in the design and manufacture of pressure vessels, and are directly related to the safe and reliable operation of pressure vessels.

[0003] For example, the authorized announcement number is CN221525530U, a head sealing structure for a pressure vessel, which relates to the technical field of pressure vessels, including: a container body and a cover. A plug ring is fixedly connected to the top of the cover. Two mounting grooves are equidistantly arranged on the outer surface of the plug ring. The inner bottoms of the two mounting grooves are both fixedly connected with telescopic rods. One ends of the two telescopic rods are both fixedly connected with clamping blocks. Springs are sleeved on the outer surfaces of the two telescopic rods. A fixing ring is fixedly connected to the outer surface of the container body near the top. In this utility model, through the cooperation of the fixing ring, the slot, the plug ring, the clamping block, the mounting groove, the telescopic rod, the spring and the clamping groove, the clamping block can be pushed into the clamping groove to complete the clamping under the action of the spring, so that the cover and the container body are installed. The container body and the cover are installed by clamping, so as to facilitate the disassembly and installation of the cover, and the practicability is relatively high.

[0004] The existing heads for boiler pressure vessels are not provided with a pressure relief mechanism. When the internal high-pressure state of the boiler pressure vessel is not stably controlled, it is easy for the boiler pressure vessel to explode; therefore, there is an urgent need in the market to develop a head for a boiler pressure vessel to help people solve the existing problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a head for a boiler pressure vessel to solve the problem that the existing heads for boiler pressure vessels are not provided with a pressure relief mechanism, and when the internal high-pressure state of the boiler pressure vessel is not stably controlled, it is easy for the boiler pressure vessel to explode as mentioned in the above background technique.

[0006] To achieve the above object, the utility model provides the following technical solution: A head for a boiler pressure vessel, comprising a head, a pressure vessel is fixedly connected to the lower end of the head, a pressure relief hole is arranged on one side of the middle of the head, a ring-shaped connecting piece is fixedly arranged at the upper end of the pressure relief hole, a pressure relief mechanism is fixedly connected to the upper end of the ring-shaped connecting piece, the pressure relief mechanism comprises a pressure relief pipe and a piston, a plurality of exhaust holes are arranged at the lower end of one side of the pressure relief pipe, the piston is arranged at the lower end inside the pressure relief pipe, a threaded sleeve is fixedly connected to the middle of the upper end of the piston, a screw rod is arranged at the upper end inside the threaded sleeve, and a transmission box for driving the screw rod to rotate is fixedly connected to the upper end of the pressure relief pipe.

[0007] Preferably, a flange is fixedly connected to the lower end of the pressure relief pipe, and the lower end of the flange and the upper end of the ring-shaped connecting piece are fixedly connected by a plurality of bolts, and a sealing gasket is arranged between the lower end of the flange and the upper end of the ring-shaped connecting piece.

[0008] Preferably, guide rods are fixedly connected to both sides of the middle of the upper end face inside the pressure relief pipe, guide tubes are fixedly connected to both sides of the middle of the upper end of the piston, and the lower ends of the two guide rods are respectively inserted into the two guide tubes.

[0009] Preferably, the lower end of the screw rod is threadedly connected to the inside of the threaded sleeve.

[0010] Preferably, the upper end of the screw rod passes through the upper end of the pressure relief pipe and extends into the transmission box and is fixedly connected to a worm gear.

[0011] Preferably, a driving motor is fixedly arranged inside the transmission box, and a worm is fixedly connected to the output shaft of the driving motor.

[0012] Preferably, the worm gear at the upper end of the screw rod is meshed with the worm tooth part on the output shaft of the driving motor.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In this utility model, through the setting of the pressure relief mechanism, the pressure relief mechanism includes a pressure relief pipe and a piston. A plurality of exhaust holes are provided at the lower end on one side of the pressure relief pipe. The piston is arranged at the lower end inside the pressure relief pipe. In the middle of the upper end of the piston, an internally threaded sleeve is fixedly connected. At the upper end inside the internally threaded sleeve, a screw rod is provided. The lower end of the screw rod is threadedly connected to the inside of the internally threaded sleeve. By rotating the screw rod, the internally threaded sleeve is driven to move up and down, so that the internally threaded sleeve drives the piston to move up and down. Through the self-locking principle similar to that between a screw rod and a slider between the internally threaded sleeve and the screw rod, the position of the piston remains stable after adjustment. When the piston is at the lower end inside the pressure relief pipe, the closing of the exhaust holes is realized. Through the air pressure sensing device inside the pressure vessel, the air pressure inside the pressure vessel is detected in real time. When the air pressure value is about to exceed the limit value that the pressure vessel can bear, the piston is driven to rise by rotating the screw rod. After the piston rises, the plurality of exhaust holes are communicated with the inside of the pressure vessel through the pressure relief holes to relieve the pressure. When the air pressure value drops to an appropriate level, the piston is driven to descend by rotating the screw rod in the reverse direction, and the exhaust holes are closed again, enabling the head to have an automatic pressure relief function.

[0015] 2. In this utility model, through the setting of the guide rods, on both sides of the middle of the upper end face inside the pressure relief pipe, guide rods are fixedly connected. On both sides of the middle of the upper end of the piston, guide tubes are fixedly connected. The lower ends of the two guide rods are respectively inserted into the two guide tubes, enabling the piston to move up and down inside the pressure relief pipe. By inserting the guide rods into the guide tubes, the up and down movement of the piston is guided to ensure stability. At the same time, the inner side of the pressure relief pipe is in close contact with the inside of the pressure relief pipe to achieve sealing.

[0016] 3. In this utility model, through the setting of the worm, the worm gear at the upper end of the screw rod is meshed with the worm tooth part on the output shaft of the driving motor. By driving the worm to rotate through the driving motor, the screw rod is driven to rotate. Through the self-locking effect between the worm and the worm gear, when the driving motor stops working, the screw rod remains stable and does not rotate. Description of the Drawings

[0017] Figure 1 It is the front view of a head for a boiler pressure vessel of this utility model;

[0018] Figure 2 It is the three-dimensional structure diagram of the head of this utility model;

[0019] Figure 3 It is the side sectional view of the pressure relief pipe of this utility model;

[0020] Figure 4 It is the front sectional view of the pressure relief pipe of this utility model.

[0021] In the figure: 1. Head; 101. Pressure vessel; 102. Pressure relief hole; 103. Ring-shaped connecting piece; 104. Sealing gasket; 2. Pressure relief mechanism; 3. Pressure relief pipe; 301. Flange; 302. Bolt; 303. Exhaust hole; 304. Guide rod; 4. Piston; 401. Guide pipe; 402. Internal thread sleeve; 403. Screw rod; 404. Worm gear; 5. Transmission box; 501. Driving motor; 502. Worm. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Please refer to Figures 1-4 , an embodiment provided by the present invention: a head for a boiler pressure vessel, including a head 1, the lower end of the head 1 is fixedly connected to a pressure vessel 101, a pressure relief hole 102 is provided on one side of the middle of the head 1, a ring-shaped connecting piece 103 is fixedly provided at the upper end of the pressure relief hole 102, a pressure relief mechanism 2 is fixedly connected to the upper end of the ring-shaped connecting piece 103, the pressure relief mechanism 2 includes a pressure relief pipe 3 and a piston 4, a plurality of exhaust holes 303 are provided at the lower end of one side of the pressure relief pipe 3, the piston 4 is arranged at the lower end inside the pressure relief pipe 3, the middle of the upper end of the piston 4 is fixedly connected to an internal thread sleeve 402, a screw rod 403 is arranged at the upper end inside the internal thread sleeve 402, and a transmission box 5 for driving the screw rod 403 to rotate is fixedly connected to the upper end of the pressure relief pipe 3.

[0024] Furthermore, a flange 301 is fixedly connected to the lower end of the pressure relief pipe 3, and the lower end of the flange 301 and the upper end of the ring-shaped connecting piece 103 are fixedly connected by a plurality of bolts 302, and a sealing gasket 104 is arranged between the lower end of the flange 301 and the upper end of the ring-shaped connecting piece 103.

[0025] Furthermore, guide rods 304 are fixedly connected to both sides of the middle of the upper end surface inside the pressure relief pipe 3, guide pipes 401 are fixedly connected to both sides of the middle of the upper end of the piston 4, and the lower ends of the two guide rods 304 are respectively inserted into the inside of the two guide pipes 401, so that the piston 4 can lift inside the pressure relief pipe 3. The lifting of the piston 4 is guided by inserting the guide rods 304 into the guide pipes 401 to ensure stability, and at the same time, the inner side of the pressure relief pipe 3 is in close contact with the inside of the pressure relief pipe 3 to achieve sealing.

[0026] Further, the lower end of the screw 403 is threadedly connected to the internal thread of the internal thread sleeve 402. By rotating the screw 403, the internal thread sleeve 402 is driven to move up and down, so that the internal thread sleeve 402 drives the piston 4 to move up and down. Due to the self-locking principle between the internal thread sleeve 402 and the screw 403 similar to that between the screw 403 and the slider, the position of the piston 4 remains stable after adjustment. When the piston 4 is at the lower end inside the pressure relief pipe 3, the exhaust hole 303 is closed. Through the air pressure sensing device inside the pressure vessel 101, the air pressure inside the pressure vessel 101 is detected in real time. When the air pressure value is about to exceed the limit value that the pressure vessel 101 can withstand, the piston 4 is driven to rise by rotating the screw 403. After the piston 4 rises, multiple exhaust holes 303 are connected to the inside of the pressure vessel 101 through the pressure relief holes 102 for pressure relief. When the air pressure value drops to an appropriate level, the piston 4 is driven to descend by rotating the screw 403 in the reverse direction, and the exhaust hole 303 is closed again, enabling the head 1 to have an automatic pressure relief function.

[0027] Further, the upper end of the screw 403 passes through the upper end of the pressure relief pipe 3 and extends into the transmission box 5, and is fixedly connected with a worm gear 404.

[0028] Further, a driving motor 501 is fixedly arranged inside the transmission box 5, and a worm 502 is fixedly connected to the output shaft of the driving motor 501.

[0029] Further, the worm gear 404 at the upper end of the screw 403 is meshed with the tooth part of the worm 502 on the output shaft of the driving motor 501. By driving the worm 502 to rotate by the driving motor 501, the screw 403 is driven to rotate. Due to the self-locking effect between the worm 502 and the worm gear 404, when the driving motor 501 stops working, the screw 403 remains stable and does not rotate.

[0030] Working principle: When in use, the lower end of the head 1 is fixedly connected to the pressure vessel 101. On one side of the middle of the head 1, there is a pressure relief hole 102. At the upper end of the pressure relief hole 102, there is a ring-shaped connecting piece 103 fixedly arranged. The upper end of the ring-shaped connecting piece 103 is fixedly connected to the pressure relief mechanism 2. The pressure relief mechanism 2 includes a pressure relief pipe 3 and a piston 4. On both sides of the middle of the upper end face inside the pressure relief pipe 3, there are guide rods 304 fixedly connected. On both sides of the middle of the upper end of the piston 4, there are guide pipes 401 fixedly connected. The lower ends of the two guide rods 304 are respectively inserted into the two guide pipes 401, enabling the piston 4 to move up and down inside the pressure relief pipe 3. By inserting the guide rods 304 into the guide pipes 401 to guide the up and down movement of the piston 4 to ensure stability, at the same time, the inner side of the pressure relief pipe 3 is in close contact with the inside of the pressure relief pipe 3 to achieve sealing. In the middle of the upper end of the piston 4, there is an internally threaded sleeve 402 fixedly connected. Inside the upper end of the internally threaded sleeve 402, there is a screw rod 403. The worm gear 404 at the upper end of the screw rod 403 is meshed with the tooth part of the worm 502 on the output shaft of the drive motor 501. By driving the worm 502 to rotate through the drive motor 501, the screw rod 403 is driven to rotate. Due to the self-locking effect between the worm 502 and the worm gear 404, when the drive motor 501 stops working, the screw rod 403 remains stable and does not rotate. The lower end of the screw rod 403 is threadedly connected to the inside of the internally threaded sleeve 402. By rotating the screw rod 403, the internally threaded sleeve 402 is driven to move up and down, enabling the internally threaded sleeve 402 to drive the piston 4 to move up and down. By the similar self-locking principle between the internally threaded sleeve 402 and the screw rod 403 as that between the screw rod 403 and the slider, the position of the piston 4 remains stable after adjustment. When the piston 4 is at the lower end inside the pressure relief pipe 3, the closing of the exhaust hole 303 is realized. Through the air pressure sensing device inside the pressure vessel 101, the air pressure inside the pressure vessel 101 is detected in real time. When the air pressure value is about to exceed the limit value that the pressure vessel 101 can withstand, the piston 4 is driven to rise by rotating the screw rod 403. After the piston 4 rises, multiple exhaust holes 303 are communicated with the inside of the pressure vessel 101 through the pressure relief hole 102 for pressure relief. When the air pressure value drops to an appropriate level, the piston 4 is driven to descend by rotating the screw rod 403 in the reverse direction, and the exhaust hole 303 is closed again, enabling the head 1 to have an automatic pressure relief function.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A head for a boiler pressure vessel, comprising a head (1), characterized in that: The lower end of the head (1) is fixedly connected to a pressure vessel (101). One side of the middle part of the head (1) is provided with a pressure relief hole (102). The upper end of the pressure relief hole (102) is fixedly provided with an annular connecting piece (103). The upper end of the annular connecting piece (103) is fixedly connected to a pressure relief mechanism (2). The pressure relief mechanism (2) includes a pressure relief pipe (3) and a piston (4). A plurality of exhaust holes (303) are provided at the lower end of one side of the pressure relief pipe (3). The piston (4) is arranged at the lower end inside the pressure relief pipe (3). The middle part of the upper end of the piston (4) is fixedly connected to an internal thread sleeve (402). A screw rod (403) is arranged at the upper end inside the internal thread sleeve (402). The upper end of the pressure relief pipe (3) is fixedly connected to a transmission box (5) for driving the screw rod (403) to rotate.

2. The head for a boiler pressure vessel according to claim 1, characterized in that: The lower end of the pressure relief pipe (3) is fixedly connected to a flange plate (301). The lower end of the flange plate (301) and the upper end of the annular connecting piece (103) are fixedly connected by a plurality of bolts (302). A sealing gasket (104) is arranged between the lower end of the flange plate (301) and the upper end of the annular connecting piece (103).

3. The head for a boiler pressure vessel according to claim 1, characterized in that: Guide rods (304) are fixedly connected to both sides of the middle part of the upper end surface inside the pressure relief pipe (3). Guide pipes (401) are fixedly connected to both sides of the middle part of the upper end of the piston (4). The lower ends of the two guide rods (304) are respectively inserted into the interiors of the two guide pipes (401).

4. The head for a boiler pressure vessel according to claim 1, characterized in that: The lower end of the screw rod (403) is in threaded connection with the inside of the internal thread sleeve (402).

5. A head for a boiler pressure vessel according to claim 1, characterized in that: The upper end of the screw rod (403) passes through the upper end of the pressure relief pipe (3) and extends into the transmission box (5) and is fixedly connected to a worm gear (404).

6. The head for a boiler pressure vessel according to claim 5, wherein: A driving motor (501) is fixedly arranged inside the transmission box (5). A worm (502) is fixedly connected to the output shaft of the driving motor (501).

7. A head for a boiler pressure vessel according to claim 6, characterized in that: The worm gear (404) at the upper end of the screw rod (403) is meshed with the tooth part of the worm (502) on the output shaft of the driving motor (501).

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