A leakage prevention device for thermal power plants

Abstract

The utility model relates to the technical field of leakage prevention, disclose a kind of leakage prevention device for thermal power plant, including first joint, the outer wall of first joint is fixedly connected with multiple outer threads, the inner wall of first joint is equipped with keying groove, the inner wall of keying groove is slidably connected with insertion pin, the inner wall of insertion pin is slidably connected with sleeve, the inner wall of sleeve is equipped with sealing groove, the inner wall of sealing groove is slidably connected with sealing ring, the outer wall of sleeve is slidably connected with second joint, the inner wall of second joint is equipped with internal thread, the inner wall of second joint is communicated with pipeline, the outer wall of pipeline is slidably connected with protection mechanism, and protection mechanism is used to protect inside and prevent leakage. In the utility model, when assembling, the outer thread of first joint is screwed with the internal thread of second joint, then the gap between parts is filled by the rotation extrusion of internal parts to realize sealing, multi-layer sealing combination prevents internal leakage from corroding and washing peripheral equipment, and improves service life.

Description

Technical Field

[0001] This utility model relates to the field of leakage prevention technology, and in particular to a leakage prevention device for thermal power plants. Background Technology

[0002] Leakage prevention devices for thermal power plants play a crucial role in the production process. They are used to prevent leaks during the operation of the power plant, ensuring a stable supply of chemical raw materials for subsequent power plant operations. They also prevent leaks during transmission from harming surrounding equipment and personnel. Leakage prevention devices for thermal power plants are mainly used at the connection points between steam turbines and pipelines, the connection points between valve seats and valve cores of various valves, and pipeline flange joints.

[0003] When preventing leakage problems in thermal power plants during operation and fulfilling the task of leak prevention, leak prevention devices for thermal power plants are required. Existing leak prevention devices for thermal power plants mostly adopt traditional comb-type seals, which use multiple toothed plates and tiny gaps between the rotor to create a throttling effect to block steam leakage. This throttling effect is used to prevent pipeline leakage, but it is easy for the sealing components to loosen due to vibration, causing internal leakage and harming external equipment, the surrounding environment, and personnel. This leads to a significant increase in production costs, reduced product quality, and shortened service life. Summary of the Invention

[0004] To overcome the above deficiencies, this utility model provides a leak-proof device for thermal power plants, which aims to improve the problem of loosening of sealing components due to vibration in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a leak-proof device for thermal power plants, comprising a first connector, the outer wall of which is fixedly connected with multiple external threads, an input groove is provided on the inner wall of the first connector, an insertion pin is slidably connected to the inner wall of the input groove, a retaining sleeve is slidably connected to the inner wall of the insertion pin, a sealing groove is provided on the inner wall of the retaining sleeve, a sealing ring is slidably connected to the inner wall of the sealing groove, a second connector is slidably connected to the outer wall of the retaining sleeve, the inner wall of the second connector is provided with internal threads, a pipe is connected to the inner wall of the second connector, and a protective mechanism is slidably connected to the outer wall of the pipe, the protective mechanism being used to protect the interior and prevent leakage.

[0006] The protective mechanism includes a sealing ring, the inner wall of which is slidably connected to the outer wall of the pipe. A first protective shell and a second protective shell are fixedly connected to the outer wall of the sealing ring. A rotating shaft is rotatably connected between adjacent first and second protective shells. Sealing strips are fixedly connected to the inner walls of both first and second protective shells. Ratchets are fixedly connected to the left and right ends of the rotating shaft. Pads are engaged with the inner walls of the ratchet. Fixed posts are fixedly connected to the left and right sides of the second protective shell.

[0007] The outer wall of the rotating shaft is rotatably connected to a housing, and the inner wall of the pawl is fixedly connected to a rotating column.

[0008] A handle is fixedly connected to the outer wall of the rotating column, and the outer wall of the rotating column is rotatably connected to the outer shell.

[0009] The outer wall of the first protective shell is fixedly connected with multiple first mounting plates, and the inner wall of the first mounting plates is threaded with multiple fixing nuts.

[0010] A bushing is fixedly connected to the bottom of the outer wall of the first mounting plate, and a ring is rotatably connected to the inner wall of the bushing.

[0011] The outer wall of the ring is engaged with a rotating column, and the outer wall of the rotating column is fixedly connected with a lever.

[0012] The outer wall of the rotating column is rotatably connected to a second mounting plate, and the rear side of the second mounting plate is fixedly connected to the outer wall of the second protective shell.

[0013] As a further description of the above technical solution:

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, during assembly, the external thread of the first connector engages with the internal thread of the second connector, generating an axial force that compresses the ferrule. The insertion pin is inserted into the inlet groove on the inner wall of the first connector. A small ring of thin material separated from the inner wall of the first connector by the insertion pin provides radial positioning for the ferrule, ensuring the installation accuracy of the sealing assembly. This small ring of thin material can be inserted into the bottom of the inner wall of the sealing groove to improve the sealing performance. The sealing ring in the sealing groove is pressed tightly against the outer wall of the insertion pin, and fills all gaps through elastic deformation to form a seal. The multi-layer sealing combination prevents internal leakage from corroding and eroding surrounding equipment, thus extending service life.

[0016] 2. In this utility model, the protection mechanism achieves enhanced protection and sealing through structural synergy. The sealing ring fits against the outer wall of the pipe to form an initial sealing barrier. The first and second protective shells rotate around the pivot to close. The inner wall sealing strip is compressed and deformed, filling the gap between the shell and the joint, thus enhancing the sealing effect. When closed, the ratchet at both ends of the pivot rotates with the shell, and the pawl engages with the ratchet tooth groove to achieve one-way locking and prevent the shell from loosening. The fixed columns on the left and right sides of the second protective shell provide a rotation platform for the pawl. The protection mechanism can restrain the high-pressure jet flow during leakage and prevent the situation from escalating into a catastrophic fragmentation and personnel injury. Attached Figure Description

[0017] Figure 1 This is a front perspective view of a leak-proof device for thermal power plants proposed in this utility model;

[0018] Figure 2 This is a partial structural diagram of a leak-proof device for thermal power plants proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the ratchet structure of a leak-proof device for thermal power plants proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the first connector structure of a leak-proof device for thermal power plants proposed in this utility model.

[0021] Figure 5 This is a partial structural exploded view of a leak-proof device for thermal power plants proposed in this utility model.

[0022] Legend:

[0023] 1. First connector; 2. Protective mechanism; 201. Sealing ring; 202. First protective shell; 203. Second protective shell; 204. Rotating shaft; 205. Sealing strip; 206. Ratchet; 207. Pawl; 208. Fixing post; 3. External thread; 4. Input groove; 5. Insert pin; 6. Sleeve; 7. Sealing groove; 8. Sealing ring; 9. Second connector; 10. Internal thread; 11. Pipe; 12. Outer shell; 13. Rotating post; 14. Turning handle; 15. First mounting plate; 16. Fixing nut; 17. Bushing; 18. Ring buckle; 19. Rotating post; 20. Paddle; 21. Second mounting plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0025] Please see the appendix Figure 1 Appendix Figure 4 and attached Figure 5 An embodiment of this utility model provides a leak-proof device for thermal power plants, comprising a first connector 1, a plurality of external threads 3 fixedly connected to the outer wall of the first connector 1, an input groove 4 opened on the inner wall of the first connector 1, an insertion pin 5 slidably connected to the inner wall of the input groove 4, a sleeve 6 slidably connected to the inner wall of the insertion pin 5, a sealing groove 7 opened on the inner wall of the sleeve 6, a sealing ring 8 slidably connected to the inner wall of the sealing groove 7, a second connector 9 slidably connected to the outer wall of the sleeve 6, an internal thread 10 opened on the inner wall of the second connector 9, a pipe 11 connected to the inner wall of the second connector 9, and a protective mechanism 2 slidably connected to the outer wall of the pipe 11, the protective mechanism 2 being used to protect the interior and prevent leakage;

[0026] Specifically, multiple external threads 3 on the outer wall of the first connector 1 precisely mesh with the internal threads 10 on the inner wall of the second connector 9. The thread pre-tightening force achieves initial fixing and sealing, preventing the medium from leaking along the joint gap. The insertion pin 5 can be inserted into the insertion groove 4 on the inner wall of the first connector 1. A small ring of thin sheet separated by the insertion pin 5 on the inner wall of the first connector 1 provides radial positioning for the ferrule 6, ensuring the installation accuracy of the sealing assembly. At the same time, it is subjected to rotational force. This small ring of thin sheet can be inserted into the bottom of the inner wall of the sealing groove 7 to improve the sealing performance. The sealing groove 7 on the inner wall of the ferrule 6 is embedded with a sealing ring 8. When the joint is connected, the sealing ring 8 is elastically deformed by the compression of the ferrule 6 and the outer wall of the pipe 11, filling the mating gap to form the main sealing defense line, blocking the medium outflow channel. The protection mechanism 2 is sleeved on the outer wall of the pipe 11. It can protect the outer wall from external dust and water vapor erosion and slow down the aging of the sealing ring 8, while also preventing internal leakage. Through structural protection, the service life of the sealing system is extended, ensuring the long-term stable operation of the device.

[0027] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3The protection mechanism 2 includes a sealing ring 201, the inner wall of the sealing ring 201 is slidably connected to the outer wall of the pipe 11, the outer wall of the sealing ring 201 is fixedly connected to a first protective shell 202 and a second protective shell 203, the adjacent first protective shell 202 and the second protective shell 203 are rotatably connected to a rotating shaft 204, the inner walls of the first protective shell 202 and the second protective shell 203 are both fixedly connected to a sealing strip 205, the left and right ends of the rotating shaft 204 are both fixedly connected to a ratchet 206, the inner wall of the ratchet 206 is engaged with a pawl 207, and the left and right sides of the second protective shell 203 are both fixedly connected to a fixing post 208.

[0028] Specifically, the protection mechanism 2 achieves sealing through multiple structures, protecting internal components while preventing internal leakage from corroding the outside. The sealing ring 201 slides tightly against the outer wall of the pipe 11, forming the first physical barrier, blocking external impurities from entering and reducing the leakage of internal media. The first protective shell 202 and the second protective shell 203 open and close by rotating the shaft 204, facilitating device installation and maintenance. The sealing strip 205 on its inner wall fits tightly, enhancing the overall sealing performance. The ratchet 206 and pawl 207 at both ends of the shaft 204 form a one-way locking structure, ensuring that the protective shell will not automatically open due to vibration after closing, maintaining a stable protective state. The fixed columns 208 on the left and right sides of the second protective shell 203 provide a platform for the rotation of the pawl 207. The protection mechanism 2 can restrain the high-pressure jet flow in the event of a re-leakage, preventing the situation from escalating into a catastrophic fragmentation and personnel injury.

[0029] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 The outer wall of the rotating shaft 204 is rotatably connected to the outer shell 12, the inner wall of the pawl 207 is fixedly connected to the rotating column 13, the outer wall of the first protective shell 202 is fixedly connected to multiple first mounting plates 15, the inner wall of the first mounting plate 15 is threadedly connected to multiple fixing nuts 16, the outer wall of the rotating column 13 is fixedly connected to the handle 14, and the outer wall of the rotating column 13 is rotatably connected to the outer shell 12.

[0030] Specifically, the outer shell 12 of the outer wall of the rotating shaft 204 provides protection for the ratchet 206 and the pawl 207, preventing impurities from affecting the locking function. The rotating column 13 on the inner wall of the pawl 207, in conjunction with the handle 14, allows manual control of the engagement state between the pawl 207 and the ratchet 206, facilitating the opening and closing of the shell. The first mounting plate 15 on the outer wall of the first protective shell 202, in conjunction with the fixing nut 16, enhances the connection strength of the protective shell. The rotational connection between the rotating column 13 and the outer shell 12 ensures smooth operation and improves the overall stability and ease of operation of the mechanism.

[0031] Please see the appendix Figure 1 and attached Figure 2A bushing 17 is fixedly connected to the bottom of the outer wall of the first mounting plate 15. A ring buckle 18 is rotatably connected to the inner wall of the bushing 17. A second mounting plate 21 is rotatably connected to the outer wall of the rotating column 19. The rear side of the second mounting plate 21 is fixedly connected to the outer wall of the second protective shell 203. The rotating column 19 is engaged with the outer wall of the ring buckle 18. A paddle 20 is fixedly connected to the outer wall of the rotating column 19.

[0032] Specifically, the bushing 17 at the bottom of the first mounting plate 15 supports the rotation of the ring buckle 18. The ring buckle 18 engages with the rotating column 19, which can further strengthen the connection between the first protective shell 202 and the second protective shell 203. The rotating column 19 is rotatably connected to the second mounting plate 21, and the second mounting plate 21 is fixed to the outer wall of the second protective shell 203 to ensure structural stability. The lever 20 facilitates manual operation of the engagement and disengagement of the rotating column 19 and the ring buckle 18, improving the convenience of opening and closing the protective shell and the reliability of the connection.

[0033] Working principle: During assembly, the external thread 3 of the first connector 1 engages with the internal thread 10 of the second connector 9, generating an axial force that compresses the ferrule 6. The insertion pin 5 is inserted into the inlet groove 4 on the inner wall of the first connector 1. A small ring of thin sheet is separated from the inner wall of the first connector 1 by the insertion pin 5, providing radial positioning for the ferrule 6 and ensuring the installation accuracy of the sealing assembly. This small ring of thin sheet can be inserted into the bottom of the inner wall of the sealing groove 7 to improve the sealing performance. The sealing ring 8 in the sealing groove 7 is pressed tightly against the outer wall of the insertion pin 5, and the elastic deformation fills all the micro gaps to form a seal. The multi-layer sealing combination prevents internal leakage from corroding and eroding surrounding equipment and shortening the service life of the equipment.

[0034] The protection mechanism 2 achieves enhanced protection and sealing through structural synergy. The sealing ring 201 fits against the outer wall of the pipe 11 to form an initial sealing barrier. The first protective shell 202 and the second protective shell 203 rotate around the pivot 204 to close. The inner wall sealing strip 205 is compressed and deformed to fill the gap between the shell and the joint, thus enhancing the sealing effect. When closed, the ratchet 206 at both ends of the pivot 204 rotates with the shell. The pawl 207 engages with the tooth groove of the ratchet 206 to achieve one-way locking and prevent the shell from loosening. The fixed posts 208 on the left and right sides of the second protective shell 203 provide a platform for the pawl 207 to rotate. The protection mechanism 2 can restrain the high-pressure jet flow in the event of a re-leakage, preventing the situation from escalating into a catastrophic fragmentation and personnel injury.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof device for thermal power plants, comprising a first connector (1), characterized in that: The outer wall of the first connector (1) is fixedly connected with multiple external threads (3). The inner wall of the first connector (1) is provided with an input groove (4). The inner wall of the input groove (4) is slidably connected with an insertion pin (5). The inner wall of the insertion pin (5) is slidably connected with a sleeve (6). The inner wall of the sleeve (6) is provided with a sealing groove (7). The inner wall of the sealing groove (7) is slidably connected with a sealing ring (8). The outer wall of the sleeve (6) is slidably connected with a second connector (9). The inner wall of the second connector (9) is provided with an internal thread (10). The inner wall of the second connector (9) is connected to a pipe (11). The outer wall of the pipe (11) is slidably connected with a protective mechanism (2). The protective mechanism (2) is used to protect the interior and prevent leakage.

2. The leak-proof device for thermal power plants according to claim 1, characterized in that: The protective mechanism (2) includes a sealing ring (201), the inner wall of which is slidably connected to the outer wall of the pipe (11), a first protective shell (202) and a second protective shell (203) are fixedly connected to the outer wall of the sealing ring (201), a rotating shaft (204) is rotatably connected between adjacent first protective shells (202) and second protective shells (203), a sealing strip (205) is fixedly connected to the inner wall of both first protective shells (202) and second protective shells (203), a ratchet (206) is fixedly connected to the left and right ends of the rotating shaft (204), a pawl (207) is engaged with the inner wall of the ratchet (206), and a fixing post (208) is fixedly connected to the left and right sides of the second protective shell (203).

3. The anti-leakage device for thermal power plants according to claim 2, characterized in that: The outer wall of the rotating shaft (204) is rotatably connected to the outer shell (12), and the inner wall of the pawl (207) is fixedly connected to the rotating column (13).

4. A leak-proof device for thermal power plants according to claim 3, characterized in that: The outer wall of the rotating column (13) is fixedly connected to a handle (14), and the outer wall of the rotating column (13) is rotatably connected to the outer shell (12).

5. A leak-proof device for thermal power plants according to claim 2, characterized in that: The outer wall of the first protective shell (202) is fixedly connected with a plurality of first mounting plates (15), and the inner wall of the first mounting plates (15) is threaded with a plurality of fixing nuts (16).

6. A leakage prevention device for thermal power plants according to claim 5, characterized in that: A bushing (17) is fixedly connected to the bottom of the outer wall of the first mounting plate (15), and a ring buckle (18) is rotatably connected to the inner wall of the bushing (17).

7. A leak-proof device for thermal power plants according to claim 6, characterized in that: The outer wall of the ring buckle (18) is engaged with a rotating column (19), and the outer wall of the rotating column (19) is fixedly connected with a lever (20).

8. A leak-proof device for thermal power plants according to claim 7, characterized in that: The outer wall of the rotating column (19) is rotatably connected to a second mounting plate (21), and the rear side of the second mounting plate (21) is fixedly connected to the outer wall of the second protective shell (203).

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