Temporary system for hydrostatic test of reheating boiler

Abstract

The invention relates to the technical field of test equipment, in particular to a reheating boiler hydraulic pressure test temporary system which comprises a reheating boiler and experimental equipment, a water supply pipe and a water outlet pipe are arranged on the two sides of the experimental equipment respectively, and the water outlet pipe is connected with a water inlet pipe on one side of the reheating boiler. A connecting mechanism is arranged between the water outlet pipe and the water inlet pipe, the connecting mechanism comprises a connecting sleeve rotationally arranged on the water outlet pipe, and the water inlet pipe is in threaded connection with the connecting sleeve; a guide pipe is fixedly arranged on the water outlet pipe, the guide pipe is in inserted connection with the water inlet pipe, an abutting ring matched with the water inlet pipe is fixedly arranged in the water inlet pipe, the water outlet pipe of the experimental equipment is connected with the water inlet pipe of the reheating boiler through the connecting mechanism, and the water outlet pipe and the water inlet pipe of the reheating boiler are in threaded connection and fixation through a connecting sleeve during connection, so that the operation is more convenient; the guide pipe arranged on the water outlet pipe is matched with the abutting ring to form a sealing structure to prevent water seepage.

Description

Technical Field

[0001] The invention relates to the technical field of test equipment, and in particular to a temporary system for a reheat boiler water pressure test. Background Art

[0002] A reheat boiler, also known as a reheater, is essentially a steam superheater that reheats low-pressure steam that has done work to a certain temperature. The function of the reheater further improves the thermal efficiency of the power plant cycle and controls the steam temperature of the last-stage blades of the turbine within an allowable range. The reheater is a heater in the boiler that heats the water vapor coming out of the turbine into superheated steam. The reheater has two functions: one is to reduce the humidity of the water vapor, which is beneficial to protecting the turbine blades; the other is to improve the relative internal efficiency and absolute internal efficiency of the turbine.

[0003] In the existing boiler water pressure test, when testing the boiler, it is necessary to connect the test assembly to the boiler, so as to perform a pressure test on the boiler. For example, Chinese patent announcement number CN115575054A discloses a "temporary thermal power station boiler water pressure test system", which is connected to the boiler system through a boiler system pressure monitoring system. After the water supply tank is filled with desalted water, the booster system is operated to perform a water pressure test on the boiler system. During the test, the water supply tank should be kept full of water and the temporary system pressure monitoring system and the boiler system pressure monitoring system should be monitored at all times to ensure that the boiler system water pressure test is completed safely and smoothly.

[0004] However, in actual use, when testing different boilers, it is necessary to connect the test components to different boilers. When connecting water pipes, in order to ensure the stability of the connection and prevent water seepage, various complex connection structures are required. The operation is complicated and requires special tools for adjustment, which affects the efficiency of the test. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that various complex connection structures are required when connecting water pipes, the operation is complicated and special tools are needed for adjustment, which affects the efficiency of the test, and a temporary system for reheat boiler water pressure test is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A temporary system for the hydraulic pressure test of a reheat boiler is designed, comprising a reheat boiler and an experimental device, a water supply pipe and a water outlet pipe are respectively arranged on both sides of the experimental device, the water supply pipe has an external water supply device, the water outlet pipe is connected to the water inlet pipe on one side of the reheat boiler, a connecting mechanism is arranged between the water outlet pipe and the water inlet pipe, and a roller is arranged at the bottom of the experimental device;

[0008] The connection mechanism comprises a connection sleeve rotatably arranged on the water outlet pipe, and the water inlet pipe is threadedly connected to the connection sleeve;

[0009] A guide pipe is fixedly arranged on the water outlet pipe, the guide pipe is plugged with the water inlet pipe, and a resistance ring matched with the water inlet pipe is fixedly arranged in the water inlet pipe.

[0010] Furthermore, a first sealing ring is fixedly provided on one side of the abutment ring close to the water outlet pipe, and the first sealing ring abuts against the guide pipe to form a sealing structure.

[0011] Furthermore, a second sealing ring is provided on the water inlet pipe, and the second sealing ring abuts against the water outlet pipe to form a sealing structure.

[0012] Furthermore, a dovetail portion is fixedly provided on the water inlet pipe, a groove matching with the dovetail portion is provided on the second sealing ring, and the second sealing ring is a silicone rubber sealing ring.

[0013] Furthermore, a third sealing ring is provided on the guide pipe, and an outer wall of the third sealing ring is in contact with an inner wall of the water inlet pipe.

[0014] Furthermore, an elastic extension portion is fixedly provided on one side of the third sealing ring facing the first sealing ring, and the extension portion is a silicone rubber extension portion.

[0015] Furthermore, an inner wall of the extension portion is provided with an oblique groove, so that the cross section of the extension portion is a trapezoidal structure.

[0016] Furthermore, a non-return structure is arranged in the water inlet pipe, and the non-return structure includes a non-return ring, a non-return part and a spring, and the spring and the non-return part are both arranged on the side of the non-return ring away from the water outlet pipe.

[0017] Furthermore, the non-return portion abuts against the non-return ring under the action of a spring, a conical groove is provided on a side of the non-return ring close to the non-return portion, and the spring is a conical spring.

[0018] Furthermore, a water pressure sensor is fixedly provided on the water inlet pipe, the sensing part of the water pressure sensor is inserted into the water inlet pipe, and a plurality of rotating rods for the convenience of operators to rotate are fixedly provided on the outer wall of the connecting sleeve, and the water pressure sensor and the experimental equipment are both externally connected to the controller.

[0019] The temporary system for water pressure test of a reheat boiler proposed by the present invention has the following beneficial effects:

[0020] In the present invention, the outlet pipe of the experimental equipment is connected to the inlet pipe of the reheat boiler through a connecting mechanism, and the connection is fixed by a connecting sleeve thread connection, which is more convenient to operate. A guide pipe is arranged on the outlet pipe to cooperate with a resistance ring to form a sealing structure to prevent water seepage.

[0021] Secondly, in the present invention, a sealing structure is formed by arranging a second sealing ring and a third sealing ring to further prevent water seepage. When water seeps into the first sealing ring, the third sealing ring is pushed by the seeping water, and its extended part is deformed by the water pressure, abutting against the outer wall of the water inlet pipe to form a sealing structure, thereby increasing the sealing performance. Moreover, by arranging an inclined groove, the greater the water pressure, the greater the upward force on the extended part, and the better the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a temporary system for water pressure testing of a reheat boiler proposed by the present invention;

[0023] Figure 2 It is a schematic diagram of the water supply pipe structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the enlarged structure of the A area of ​​the present invention;

[0025] Figure 4 It is a schematic diagram of the enlarged structure of region B of the present invention.

[0026] In the figure: 1. reheat boiler; 2. experimental equipment; 21. water supply pipe; 22. water outlet pipe; 23. water inlet pipe; 231. water pressure sensor; 24. roller; 25. resistance ring; 251. first sealing ring; 3. connecting mechanism; 31. connecting sleeve; 311. rotating rod; 32. guide pipe; 33. second sealing ring; 34. dovetail; 35. third sealing ring; 36. extension part; 361. inclined groove; 4. non-return structure; 41. non-return ring; 42. non-return part; 43. spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figure 1-4 A temporary system for a reheat boiler water pressure test comprises a reheat boiler 1 and an experimental device 2. A water supply pipe 21 and a water outlet pipe 22 are respectively arranged on both sides of the experimental device 2. The water supply pipe 21 is an external water supply device. The water outlet pipe 22 is connected to a water inlet pipe 23 on one side of the reheat boiler 1. A connecting mechanism 3 is arranged between the water outlet pipe 22 and the water inlet pipe 23. A roller 24 is arranged at the bottom of the experimental device 2.

[0029] The connection mechanism 3 includes a connection sleeve 31 rotatably disposed on the water outlet pipe 22, and the water inlet pipe 23 is threadedly connected to the connection sleeve 31;

[0030] A guide pipe 32 is fixedly provided on the water outlet pipe 22 , the guide pipe 32 is plugged into the water inlet pipe 23 , and an abutment ring 25 matched with the water inlet pipe 23 is fixedly provided inside the water inlet pipe 23 .

[0031] In the present invention, the water outlet pipe 22 of the experimental equipment 2 is connected to the water inlet pipe 23 of the reheat boiler 1 through the connecting mechanism 3, and the connection is fixed by a threaded connection through the connecting sleeve 31, which is more convenient to operate. By arranging a guide tube 32 on the water outlet pipe 22 to cooperate with the resistance ring 25, a sealing structure is formed to prevent water seepage.

[0032] Furthermore, in this embodiment, a first sealing ring 251 is fixedly provided on one side of the abutment ring 25 close to the water outlet pipe 22. The first sealing ring 251 abuts against the guide pipe 32 to form a sealing structure. The sealing performance is increased by providing the first sealing ring 251, and the first sealing ring 251 is made of silicone rubber.

[0033] In this embodiment, a second sealing ring 33 is provided on the water inlet pipe 23, and the second sealing ring 33 abuts against the water outlet pipe 22 to form a sealing structure. The abutment of the second sealing ring 33 against the water outlet pipe 22 increases the sealing performance and prevents water seepage at the connection of the first sealing ring 251 from causing unstable water pressure.

[0034] Furthermore, in the present embodiment, a dovetail portion 34 is fixedly provided on the water inlet pipe 23, and a slot matching the dovetail portion 34 is provided on the second sealing ring 33. The second sealing ring 33 is a silicone rubber sealing ring. When the second sealing ring 33 ages due to long-term use, the second sealing ring 33 can be removed and replaced. When the second sealing ring 33 is removed, it undergoes elastic deformation, thereby separating the slot from the dovetail portion 34.

[0035] In this embodiment, a third sealing ring 35 is provided on the guide tube 32, the outer wall of the third sealing ring 35 contacts the inner wall of the water inlet pipe 23, and an annular mounting groove matching the third sealing ring 35 is opened on the guide tube 32, and the third sealing ring 35 is fixedly connected to the mounting groove.

[0036] It should be noted that, in the present embodiment, the third sealing ring 35 is fixedly provided with an elastic extension portion 36 on one side facing the first sealing ring 251, and the extension portion 36 is a silicone rubber extension portion. When water seeps into the first sealing ring 251, the extension portion 36 of the third sealing ring 35 is pushed by the seeping water, and the extension portion 36 is deformed by the water pressure, and abuts against the outer wall of the water inlet pipe 23 to form a sealing structure, thereby increasing the sealing performance.

[0037] In this embodiment, an inclined groove 361 is provided on the inner wall of the extension portion 36, so that the cross-section of the extension portion 36 is a trapezoidal structure. When water leaks into the first sealing ring 251, the greater the water pressure, the greater the upward force applied to the extension portion 36, the greater the force abutting against the inner wall of the water inlet pipe 23, and the better the sealing performance.

[0038] In addition, in this embodiment, a non-return structure 4 is provided in the water inlet pipe 23, and the non-return structure 4 includes a non-return ring 41, a non-return portion 42 and a spring 43. The spring 43 and the non-return portion 42 are both arranged on the side of the non-return ring 41 away from the water outlet pipe 22. During the test, the non-return portion 42 is pushed by the water flow to separate from the non-return ring 41, so that the water flow can pass through.

[0039] In this embodiment, the check portion 42 abuts against the check ring 41 under the action of the spring 43. A conical groove is provided on the side of the check ring 41 close to the check portion 42. The spring 43 is a tower-shaped spring. When the water pressure in the water inlet pipe 23 is consistent with the water pressure in the water outlet pipe 22 of the experimental equipment 2, the check portion 42 is not subjected to force and contacts the check ring 41. When the water supply to the water inlet pipe 23 is stopped, the check portion 42 abuts against the check ring 41 to form a sealing structure to prevent water from seeping out. In some embodiments, a silicone rubber sealing pad is provided on the conical groove.

[0040] In more detail, in some embodiments, a water pressure sensor 231 is fixedly provided on the water inlet pipe 23, and the sensing part of the water pressure sensor 231 is inserted into the water inlet pipe 23. A plurality of rotating rods 311 for convenient rotation by the operator are fixedly provided on the outer wall of the connecting sleeve 31. The water pressure sensor 231 and the experimental equipment 2 are both externally connected to a controller, and the water pressure of the water inlet pipe 23 is monitored by the controller and compared with the water pressure in the reheat boiler 1 and the water pressure of the experimental equipment 2, thereby obtaining the test results.

[0041] Working method: When working, the outlet pipe 22 of the experimental equipment 2 is connected to the water inlet pipe 23 of the reheat boiler 1 through the connecting mechanism 3. When connecting, the experimental equipment 2 is moved so that the guide pipe 32 is inserted into the water inlet pipe 23. The guide pipe 32 is abutted against the first sealing ring 251 to form a sealing structure by rotating the connecting sleeve 31. At the same time, the second sealing ring 33 abuts against the outlet pipe 22 to increase the sealing performance, so as to prevent water leakage at the connection of the first sealing ring 251 and cause unstable water pressure;

[0042] After the connection is completed, water is supplied to the reheat boiler 1 through the experimental equipment 2. When the reheat boiler 1 is full of water, the water outlet of the reheat boiler 1 is closed, and the reheat boiler 1 is pressurized by the experimental equipment 2 to increase the water pressure in the reheat boiler 1. When the pressure applied by the experimental equipment 2 reaches a preset value, the controller monitors the water pressure of the water inlet pipe 23 and compares it with the water pressure in the reheat boiler 1 and the water pressure of the experimental equipment 2, thereby obtaining the test results;

[0043] When water seeps into the first sealing ring 251 , the extension part 36 of the third sealing ring 35 is pushed by the seeping water, and the extension part 36 is deformed by the water pressure. The greater the water pressure, the greater the upward force on the extension part 36 , the greater the force abutting against the inner wall of the water inlet pipe 23 , and the better the sealing performance.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A temporary system for a reheat boiler hydraulic test, comprising a reheat boiler (1) and a test device (2), characterized in that: A water supply pipe (21) and a water outlet pipe (22) are respectively arranged on both sides of the experimental device (2); the water supply pipe (21) is an external water supply device; the water outlet pipe (22) is connected to a water inlet pipe (23) on one side of the reheat boiler (1); a connecting mechanism (3) is arranged between the water outlet pipe (22) and the water inlet pipe (23); and a roller (24) is arranged at the bottom of the experimental device (2); The connection mechanism (3) comprises a connection sleeve (31) rotatably arranged on the water outlet pipe (22), and the water inlet pipe (23) is threadedly connected to the connection sleeve (31); A guide pipe (32) is fixedly arranged on the water outlet pipe (22), the guide pipe (32) is plugged into the water inlet pipe (23), and a resistance ring (25) matching with the water inlet pipe (23) is fixedly arranged inside the water inlet pipe (23).

2. A temporary system for hydraulic test of a reheat boiler according to claim 1, characterized in that: A first sealing ring (251) is fixedly provided on one side of the abutment ring (25) close to the water outlet pipe (22), and the first sealing ring (251) abuts against the guide pipe (32) to form a sealing structure.

3. A temporary system for hydraulic pressure testing of a reheat boiler according to claim 2, characterized in that: The water inlet pipe (23) is provided with a second sealing ring (33), and the second sealing ring (33) abuts against the water outlet pipe (22) to form a sealing structure.

4. A temporary system for hydraulic pressure testing of a reheat boiler according to claim 3, characterized in that: A dovetail portion (34) is fixedly provided on the water inlet pipe (23), a groove matching the dovetail portion (34) is provided on the second sealing ring (33), and the second sealing ring (33) is a silicone rubber sealing ring.

5. A temporary system for hydraulic pressure testing of a reheat boiler according to claim 4, characterized in that: The guide pipe (32) is provided with a third sealing ring (35), and the outer wall of the third sealing ring (35) is in contact with the inner wall of the water inlet pipe (23).

6. A temporary system for hydraulic pressure test of a reheat boiler according to claim 5, characterized in that: An elastic extension portion (36) is fixedly provided on one side of the third sealing ring (35) facing the first sealing ring (251), and the extension portion (36) is a silicone rubber extension portion.

7. A temporary system for hydraulic pressure test of a reheat boiler according to claim 6, characterized in that: An oblique groove (361) is provided on the inner wall of the extension portion (36), so that the cross section of the extension portion (36) is a trapezoidal structure.

8. A temporary system for hydraulic test of a reheat boiler according to claim 1, characterized in that: A non-return structure (4) is arranged in the water inlet pipe (23), and the non-return structure (4) comprises a non-return ring (41), a non-return portion (42) and a spring (43), and the spring (43) and the non-return portion (42) are both arranged on a side of the non-return ring (41) away from the water outlet pipe (22).

9. A temporary system for hydraulic pressure test of a reheat boiler according to claim 8, characterized in that: The non-return portion (42) abuts against the non-return ring (41) under the action of a spring (43); a conical groove is provided on a side of the non-return ring (41) close to the non-return portion (42); and the spring (43) is a conical spring.

10. A temporary system for hydraulic pressure test of a reheat boiler according to claim 1, characterized in that: A water pressure sensor (231) is fixedly arranged on the water inlet pipe (23), and a sensing part of the water pressure sensor (231) is inserted into the water inlet pipe (23). A plurality of rotating rods (311) for convenient rotation by an operator are fixedly arranged on the outer wall of the connecting sleeve (31). The water pressure sensor (231) and the experimental equipment (2) are both connected to an external controller.

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