A generator end cover glue injection check valve

Abstract

The present invention belongs to the technical field of glue injection devices, and specifically relates to a generator end cover glue injection check valve, including a connector I, a connector II, a baffle and a spring; the connector I is provided with a glue injection channel, one end of the connector I is connected to a glue injection gun, and the other end is arranged inside one end of the connector II; the baffle is arranged inside the other end of the connector I; the connector II is provided with a glue injection channel, which is connected to the engine end cover; a spring is arranged between the baffle and the connector II, the spring is located in the direction of the glue injection channel, and applies pressure in the direction of the baffle. This device effectively solves the problem in the prior art that hydrogen may leak quickly from the glue injection port, and greatly reduces the major industrial safety risk of hydrogen explosion and the risk of equipment damage.

Description

Technical Field

[0001] The invention belongs to the technical field of glue injection devices, and in particular relates to a glue injection check valve for a generator end cover. Background Art

[0002] At present, hydrogen is used for cooling the stator core and rotor of large generators. The generator end cover is an important hydrogen sealing boundary. There is a glue groove inside the generator end cover. Hydrogen sealing is achieved by filling the glue groove with glue from the glue injection port. The quality of glue injection directly affects the tightness of the hydrogen boundary of the generator body. If a hydrogen leakage defect occurs on the generator end cover during the operation of the unit, online glue injection is required at the glue injection port of the generator.

[0003] At present, online glue injection requires removing the wire plug from the glue injection port of the generator end cover, connecting the glue injection gun to the glue injection port of the end cover, and then injecting glue into the generator end cover. However, this method has the following problems:

[0004] 1. When removing the generator end cover plug, the generator interior is large and hydrogen may leak quickly from the injection port, posing a major industrial safety risk of hydrogen explosion;

[0005] 2. The inside of the end cap injection port is a pipe thread structure, and there is a lot of sealant. When the injection gun is connected to the end cap injection port, it is easy to deviate upward, causing damage to the pipe thread;

[0006] 3. After the glue injection is completed, remove the glue injection gun. Due to the high pressure of the sealant inside the end cover, the sealant will continue to overflow from the glue injection port, making it difficult to reinstall the screw plug. Summary of the invention

[0007] The purpose of the present invention is to provide a generator end cover glue injection check valve, which can improve the reliability of glue injection and enhance the safety of equipment.

[0008] The technical solution of the present invention is as follows:

[0009] A generator end cover glue injection check valve comprises a connector I, a connector II, a baffle and a spring; the connector I is provided with a glue injection channel, one end of the connector I is connected to a glue injection gun, and the other end is arranged inside one end of the connector II; the baffle is arranged inside the other end of the connector I; the connector II is provided with a glue injection channel, which is connected to the engine end cover; a spring is arranged between the baffle and the connector II, the spring is located in the direction of the glue injection channel, and applies pressure in the direction of the baffle.

[0010] One end of the connector I is processed into a hollow screw with internal threads, the middle part is processed into a hexagonal nut, and the other end is processed with a quick connector, wherein the hexagonal nut and the quick connector are internally processed with a through hole as a part of the glue injection channel, and the through hole is coaxial with and connected to the inside of the screw;

[0011] One end of the connector II is processed into a cylindrical screw with external threads, which is connected to the engine end cover, and the other end is processed with a through hole, which is the same as the inside of the cylindrical screw, forming a glue injection channel inside the connector II.

[0012] The other end of the connector II is processed into a conical hexagonal nut with a conical outer surface and an inner wall having an internal thread. The conical hexagonal nut has a conical surface inside, that is, the inside of the connector II is through, and a smooth through hole is processed inside the cylindrical screw, which is connected to the smooth conical surface and the internal threaded hole in the conical hexagonal nut, forming a part of the glue injection channel.

[0013] A spring is installed between the conical surface of the conical hexagonal nut and the baffle.

[0014] The baffle blocks the glue injection channel of the connector 1.

[0015] One side of the baffle is a panel, and the other side is a hollow screw with grooves, on which grooves are processed.

[0016] A spring is arranged between the conical surface of the conical hexagonal nut and the grooved screw.

[0017] A dustproof bolt is arranged inside the quick connector.

[0018] The connector I is made of copper, and the connector II is made of copper.

[0019] The quick connector is connected to the glue injection gun, and the connector II is connected to the glue injection port of the generator end cover. When injecting glue into the generator end cover, the dustproof bolt is first removed to allow the glue to flow into the glue injection channel in the quick connector. When the pressure at the glue injection gun tip is greater than the internal pressure of the generator check valve, the baffle and the spring move toward the connector II, and the glue injection channel between the two connectors opens. After the glue injection work is completed, the pressure at the glue injection gun tip is released, and the baffle and the spring move in the opposite direction to block the glue injection channel.

[0020] The remarkable effects of the present invention are as follows:

[0021] 1. Through the baffle structure and the principle of mechanical sealing, the problem of rapid leakage of hydrogen from the injection port in the prior art is effectively solved, which greatly reduces the major industrial safety risk of hydrogen explosion and the risk of equipment damage;

[0022] 2. Through the quick connector structure, the glue injection gun can be quickly disassembled and assembled without disassembling the check valve, thereby improving the glue injection efficiency;

[0023] 3. The two-part connector effectively avoids the risk of rapid leakage of hydrogen from the injection port and damage to the internal pipe thread of the injection port;

[0024] 4. The spring realizes the mechanical sealing of the injection channel of the two connectors, and the injection and sealing effects can be achieved without manually opening and closing the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the assembly of the parts of the generator end cover injection check valve;

[0026] Figure 2 Schematic diagram of the check valve for injection molding of the generator end cover;

[0027] In the figure: 1. Connector I; 2. Baffle; 3. Spring; 4. Connector II; 5. Dustproof bolt;

[0028] 1-1. Screw; 1-2. Hexagonal nut; 1-3. Quick connector; 1-4. Through hole;

[0029] 2-1. Panel; 2-2. Slotted screw;

[0030] 4-1. Cylindrical screw; 4-2. Conical hexagonal nut. DETAILED DESCRIPTION

[0031] The present invention will be further described below through the accompanying drawings and specific implementation methods.

[0032] like Figure 1 and Figure 2 As shown, the generator end cover glue injection check valve includes a connector I1, a baffle 2, a spring 3, a connector II4, and a dustproof bolt 5.

[0033] The basic implementation method is:

[0034] It includes a connector I1, a connector II4, a baffle 2 and a spring 3;

[0035] A glue injection channel is processed inside the connector I1, one end of the connector I1 is connected to the glue injection gun, and the other end is installed inside one end of the connector II4;

[0036] The baffle 2 is installed inside the other end of the connector I1; a glue injection channel is processed inside the connector II4, which is connected to the engine end cover;

[0037] A spring 3 is installed between the baffle 2 and the connector II4 . The spring 3 is located in the direction of the glue injection channel and applies pressure in the direction of the baffle 2 .

[0038] The connector I1 is made of copper, which is softer than steel and less likely to generate sparks.

[0039] One end of the connector I1 is processed into a hollow screw 1-1 with an internal thread, the middle part is processed into a hexagonal nut 1-2, and the other end is processed into a quick connector 1-3;

[0040] A through hole 1-4 is processed inside the hexagonal nut 1-2 and the quick connector 1-3 as a part of the glue injection channel, and the through hole 1-4 is coaxial with and connected to the inside of the screw rod 1-1.

[0041] One end of the connector II4 is processed into a cylindrical screw 4-1 with external threads, and the other end is processed into a conical hexagonal nut 4-2 with a conical outer surface and an internal thread on the inner wall;

[0042] The conical hexagonal nut 4-2 has a conical surface inside, that is, the connector II4 is connected inside, and a smooth through hole is processed inside the cylindrical screw 4-1, which is connected to the smooth conical surface and internal threaded hole in the conical hexagonal nut 4-2, forming a part of the glue injection channel.

[0043] Connector II4 is made of copper, and cylindrical screw 4-1 matches the generator end cover;

[0044] One side of the baffle 2 is a panel 2-1, and the other side is a hollow grooved screw 2-2, on which a groove is processed, and the entire baffle 2 is processed with external threads, so that it can be installed inside the screw 1-1 with internal threads of the connector I1 through threaded connection. The groove structure can ensure that the glue injection channel is unobstructed after the two parts of the joint are connected, and also prevent the sealant from overflowing.

[0045] A spring 3 is installed between the smooth conical surface of the conical hexagonal nut 4-2 and the grooved screw 2-2.

[0046] One side of the connector I1 is a screw connected to the internal thread of the connector II4;

[0047] The other side has quick connectors 1-3 that match the glue gun connector.

[0048] The middle part of the connector I1 is designed with a hexagonal nut for easy disassembly and assembly, and a through hole is opened inside to form a partial glue injection channel.

[0049] When glue is not injected, the dustproof bolt 5 can be installed in the glue injection channel of the quick connector 1-3 through threaded connection.

[0050] One side of the baffle 2 matches the screw side of the connector I1, which can block the glue injection channel of the connector I1. The spring 3 is installed in the groove of the baffle 2, which can keep the pressure of the baffle 2 constant. At the same time, a groove is opened in the middle part of the baffle 2 to ensure that the glue injection channel is unobstructed and prevent the sealant from overflowing.

[0051] The connector II4 is made of copper, and the thread on the screw side is a pipe thread, which is connected to the injection port of the generator end cover; the other side has an internal thread, which is connected to the connector I1. The end of the connector II4 is designed as a hexagonal nut for easy disassembly and assembly, and a through hole is opened inside to form a glue injection channel.

[0052] The spring 3 and the baffle 2 are assembled inside the connector I1 and the connector II4 to block the injection port with a constant pressure to prevent the sealant from overflowing from the generator end cover injection check valve.

[0053] During installation,

[0054] First, install the spring in the baffle 2, and then install the baffle 2 into one end of the connector I1 through threads;

[0055] Then install the connector I1 with the baffle 2 installed on the hexagonal nut end of the connector II4, so that the spring 3 and the baffle 2 are assembled inside the connector I1 and the connector II4, block the injection port with a constant pressure, and then install the dustproof bolt 5.

[0056] The cylindrical screw 4-1 of the connector II4 is connected to the glue injection port of the generator end cover;

[0057] When injecting glue into the generator end cover, the dustproof bolt 5 must be removed first, and the glue injection gun joint is connected to the quick connector 1-3 of the connector I1, and the glue flows into the glue injection channel in the quick connector 1-3;

[0058] When the pressure at the injection gun tip is greater than the internal pressure of the generator check valve, the pressure pushes the baffle 2 and the spring 3 backward (in the direction of the connector II4), the panel 2-1 of the baffle 2 is separated from the end of the through hole 1-4, and the injection channel between the two joints is opened, so that glue can be continuously injected into the generator end cover.

[0059] When the glue injection work is completed, the pressure at the glue injection gun head is released, and the baffle 2 and the spring 3 move forward to block the glue injection channel to ensure the mechanical sealing of the generator end cover check valve.

Claims

1. A generator end cover injection check valve, characterized in that: The invention comprises a connector I (1), a connector II (4), a baffle (2) and a spring (3); a glue injection channel is provided in the connector I (1); one end of the connector I (1) is connected to a glue injection gun, and the other end is arranged inside one end of the connector II (4); the baffle (2) is arranged inside the other end of the connector I (1); a glue injection channel is provided in the connector II (4), and is connected to the engine end cover; a spring (3) is provided between the baffle (2) and the connector II (4); the spring (3) is located in the direction of the glue injection channel and applies pressure in the direction of the baffle (2); One end of the connector I (1) is processed into a hollow screw (1-1) with an internal thread, the middle part is processed into a hexagonal nut (1-2), and the other end is processed with a quick connector (1-3), wherein the hexagonal nut (1-2) and the quick connector (1-3) are internally processed with a through hole (1-4) as a part of the glue injection channel, and the through hole (1-4) is coaxial with and connected to the inside of the screw (1-1); One end of the connector II (4) is processed into a cylindrical screw (4-1) with an external thread, which is connected to the engine end cover, and the other end is processed with a through hole, which is the same as the inside of the cylindrical screw (4-1) and constitutes a glue injection channel inside the connector II (4); The other end of the connector II (4) is processed into a conical hexagonal nut (4-2) with a conical outer surface and an inner wall having an internal thread. The conical hexagonal nut (4-2) has a conical surface inside, that is, the connector II (4) is connected inside, and a smooth through hole is processed inside the cylindrical screw (4-1), which is connected with the smooth conical surface and the internal thread hole in the conical hexagonal nut (4-2), forming a part of the injection channel; A spring (3) is installed between the conical surface of the conical hexagonal nut (4-2) and the baffle (2); The baffle (2) blocks the glue injection channel of the connector I (1).

2. A generator end cover glue injection check valve as claimed in claim 1, characterized in that: One side of the baffle (2) is a panel (2-1), and the other side is a hollow screw with grooves (2-2), and a groove is processed on the baffle (2).

3. A generator end cover glue injection check valve as claimed in claim 2, characterized in that: A spring (3) is provided between the conical surface of the conical hexagonal nut (4-2) and the grooved screw rod (2-2).

4. A generator end cover glue injection check valve as claimed in claim 1, characterized in that: A dustproof bolt (5) is provided inside the quick connector (1-3).

5. A generator end cover glue injection check valve as claimed in claim 4, characterized in that: The connector I (1) is made of copper, and the connector II (4) is made of copper.

6. A generator end cover glue injection check valve as claimed in claim 4, characterized in that: The quick connector (1-3) is connected to the glue injection gun, and the connector II (4) is connected to the glue injection port of the generator end cover. When injecting glue into the generator end cover, the dustproof bolt (5) is first removed, and the glue flows into the glue injection channel in the quick connector (1-3). When the pressure at the gun head of the glue injection gun is greater than the internal pressure of the generator check valve, the baffle (2) and the spring (3) move toward the connector II (4), and the glue injection channel between the two connectors is opened. After the glue injection work is completed, the pressure at the gun head of the glue injection gun is released, and the baffle (2) and the spring (3) move in the opposite direction to block the glue injection channel.

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