CN210788360U - Backwashing device of water-cooled generator - Google Patents

Abstract

The utility model discloses a water-cooling generator back flush device, including generator inlet valve, generator water valve, back flush device inlet valve, back flush device outlet valve, air-water mixing three-way pipe and compressed air governing valve, generator inlet valve installs on the generator inlet tube, installation back flush device inlet valve on the sparge water inlet tube, the sparge water inlet tube passes through the air-water mixing three-way pipe and connects air-water mixing outlet pipe, generator play water catchment pipe and generator outlet pipe are connected to the delivery port of air-water mixing outlet pipe, installation generator water valve on the generator outlet pipe, installation back flush device outlet valve on the back flow. The utility model discloses experience forward, reverse water injection washing process repeatedly in simplifying to wash, realize washing in succession the generator water route, improve the flushing efficiency, shorten the flushing time, promoted to the obstinate attached dirt cleaning capacity. The external pipeline connection is simplified, frequent operation is avoided in the washing process, and labor is saved.

Description

A water-cooled generator backwash device

technical field

The utility model relates to the technical field of overhaul and maintenance of a water-cooled generator, in particular to a backwash device for a water-cooled generator.

Background technique

The cleanliness of the water circuit of the coil of the water-cooled generator is extremely important. Although a series of measures have been taken in the water system to ensure the smooth flow of water, it is inevitable that dirt will accumulate in corners, bends, necking, etc. After a long period of operation, it may cause The flow is reduced or partially blocked, so in order to ensure the safe operation of the generator and the smooth flow of the water, it must be combined with maintenance and flushing.

The water-cooled generator set in the prior art generally adopts the method of factory design and installation of the stator coil water circuit backwashing pipeline system.

Among them, the backwash device of the generator water cooling system is composed of pipes and four valves installed at the inlet and outlet of the cooling water of the stator coil. By changing the switch state of the corresponding valve, the water inlet side of the coil can be changed to the water outlet side, and the water outlet side can be changed to the water inlet side, so that it can be flushed from the opposite direction when the generator is overhauled. The water is introduced from the generator outlet pipe, and is led out through the outlet insulated water pipe → the stator coil → the water inlet insulated water pipe → the generator inlet pipe. Its operation is simple, no external pipeline is required, and it can be flushed continuously. Dirt accumulates at corners, bends, neckings, etc. during the reverse flushing operation. However, the flushing efficiency is low, and flushing takes a long time; since the flushing water pressure is the operating pressure (0.25-0.3MPa), the flow rate and flow rate are the same as those in operation, resulting in low water pressure and flow rate. If the stubbornly attached dirt on the inner wall fails to achieve the flushing effect, the cleanliness of the water circuit system cannot be achieved.

Combined with the actual situation of the water-cooled generator coil backwashing site, it is necessary to solve the low flushing water pressure and flow rate of the backwashing device of the water-cooled system.

Utility model content

The purpose of the utility model is to provide a water-cooled generator backwashing device, which simplifies the process of repeated forward and reverse water injection flushing during flushing, realizes continuous flushing of the generator waterway, improves flushing efficiency, shortens flushing time, and improves the efficiency of flushing. The ability to clean stubbornly attached dirt. In the case of a tight maintenance period, the water system can be completely cleaned; because the external pipeline connection is simplified, there is no frequent operation during the flushing process, which saves manpower and can solve the problems in the prior art.

To achieve the above object, the utility model provides the following technical solutions:

A water-cooled generator backwashing device, comprising a generator water inlet valve, a generator water valve, an inlet valve of the backwashing device, an outlet valve of the backwashing device, a gas-water mixing three-way pipe and a compressed air regulating valve. The water valve is installed on the generator water inlet pipe, the generator water inlet pipe is connected to the flushing water inlet pipe at the water inlet end of the generator water inlet valve, and the generator water inlet pipe is connected to the water outlet end of the generator water inlet valve. Return pipe and generator water inlet manifold, the flushing water inlet pipe is installed with the inlet valve of the backwashing device, the flushing water inlet pipe is connected to the gas-water mixing outlet pipe through the gas-water mixing tee, and the gas-water mixing outlet is The water outlet of the pipe is connected to the generator water outlet manifold and the generator water outlet pipe, the generator water valve is installed on the generator water outlet pipe, the generator water outlet pipe is also connected to the return pipe, and the backwash device outlet valve is installed on the return pipe.

Further, the gas-water mixing tee pipe is composed of a horizontal pipe and a vertical pipe, the horizontal pipe and the vertical pipe are connected with each other, the water inlet end of the horizontal pipe is connected with the flushing water inlet pipe, and the water outlet pipe of the horizontal pipe is connected with the gas-water mixing outlet pipe. , A compressed air regulating valve is installed on the longitudinal pipe, and the intake end of the compressed air regulating valve is connected to a compressed air pipe.

Further, the gas-water mixing tee pipe is a stainless steel pipe for tee connection.

Further, a reverse flow block is arranged at the inner connection of the horizontal tube and the vertical tube.

Further, the inner wall of the reverse flow block is an arc-shaped surface, and the rounded corners connected with the horizontal pipe and the vertical pipe form an arc-shaped channel.

Further, the generator water inlet pipe is connected to the generator water inlet pipe of the generator, the generator water inlet pipe is connected to the generator outlet water pipe through the generator coil, and the generator water outlet pipe and the generator water outlet pipe are connected. connect.

Further, the air-water mixing outlet pipe is provided with a filter.

Compared with the prior art, the beneficial effects of the present utility model are as follows:

The water-cooled generator backwashing device, after the flushing water and compressed air are introduced into the backwashing device's flushing water inlet pipe and the compressed air regulating valve respectively, the compressed air and the flushing water are fully mixed in the gas-water mixing tee, and the gas-water The mixed outlet pipe forms flushing water with high flow rate and stable pressure, which simplifies the repeated forward and reverse water injection flushing process during flushing, realizes continuous flushing of the generator water circuit, improves flushing efficiency, shortens flushing time, and improves resistance to stubborn adhesion. Dirt cleaning ability. In the case of a tight maintenance period, the water system can be completely cleaned; because the external pipeline connection is simplified, there is no frequent operation during the flushing process, saving manpower.

Description of drawings

Fig. 1 is the structural principle schematic diagram of the present utility model;

Fig. 2 is the sectional view of the utility model gas-water mixing tee;

FIG. 3 is an enlarged view of part A of FIG. 2 of the utility model.

In the figure: 1. Generator inlet valve; 2. Generator water valve; 3. Inlet valve of backwashing device; 4. Outlet valve of backwashing device; 5. Gas-water mixing tee; 51. Horizontal pipe; 511. Backflow block; 52. Longitudinal pipe; 6. Compressed air regulating valve; 7. Generator inlet pipe; 8. Flushing water inlet pipe; 9. Return pipe; 10. Generator inlet water manifold; 11. Generator outlet manifold ; 12, generator outlet pipe; 13, compressed air pipe; 14, generator; 15, generator water inlet pipe; 16, generator coil; 17, generator outlet pipe; 18, gas-water mixing outlet pipe.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to Figure 1, a water-cooled generator backwashing device includes a generator water inlet valve 1, a generator water valve 2, a backwashing device inlet valve 3, a backwashing device outlet valve 4, a gas-water mixing tee 5 and a compression The air regulating valve 6 and the generator water inlet valve 1 are installed on the generator water inlet pipe 7, the water flow enters from the generator water inlet pipe 7, and the generator water inlet pipe 7 is located at the water inlet end of the generator water inlet valve 1 to communicate with the flushing water The inlet pipe 8, the generator water inlet pipe 7 is located at the outlet end of the generator water inlet valve 1 and is connected to the return pipe 9 and the generator water inlet manifold 10. The flushing water inlet pipe 8 is installed with the backwashing device inlet valve 3, and the flushing water The inlet pipe 8 is connected to the gas-water mixing outlet pipe 18 through the gas-water mixing tee pipe 5. The flushing water inlet pipe 8 and the compressed air flow into the gas-water mixing tee pipe 5, and the gas-water mixing tee pipe 5 is made of stainless steel. The water outlet of the gas-water mixing outlet pipe 18 is connected to the generator water outlet pipe 11 and the generator water outlet pipe 12, the generator water valve 2 is installed on the generator water outlet pipe 12, and the generator water outlet pipe 12 is also connected to the return pipe 9, The return pipe 9 is used to discharge the backwashed sewage, and the backwashing device outlet valve 4 is installed on the return pipe 9 , and the valve is used to open the return pipe 9 .

2, the gas-water mixing tee 5 is composed of a horizontal pipe 51 and a vertical pipe 52, the horizontal pipe 51 and the vertical pipe 52 are connected to each other, the water inlet end of the horizontal pipe 51 is connected to the flushing water inlet pipe 8, and the outlet The water pipe is connected to the air-water mixing outlet pipe 18, the compressed air regulating valve 6 is installed on the vertical pipe 52, and the intake end of the compressed air regulating valve 6 is connected to the compressed air pipe 13. After opening the compressed air regulating valve 6, the compressed air and flushing water inlet pipe 8. The flushing water is collected together, and the compressed air is mixed with the flushing water. The compressed air accelerates the water flow and enhances the flushing effect.

Referring to FIG. 3 , a reverse flow block 511 is provided at the inner connection of the horizontal pipe 51 and the vertical pipe 52 . The inner wall of the reverse flow block 511 is an arc-shaped surface, and the rounded corners at the connection with the horizontal pipe 51 and the vertical pipe 52 form an arc-shaped channel. Propel to accelerate the flow of water.

The generator water inlet manifold 10 is connected to the generator water inlet pipe 15 of the generator 14. The generator water inlet pipe 15 is connected to the generator outlet water pipe 17 through the generator coil 16, and the generator outlet water pipe 17 is connected to the generator outlet. The manifold 11 is connected. When the generator 14 is in normal operation, the generator inlet valve 1 and generator water valve 2 of the backwash device are opened, the inlet valve 3 of the backwash device, the outlet valve 4 of the backwash device, the gas-water mixing three-way pipe 5 and the compressed air regulator are opened. The valve 6 is closed, and the internal cold water is introduced from the generator water inlet pipe 7, through the generator water inlet manifold 10 → the generator water inlet pipe 15 → the generator coil 16 → the generator outlet water pipe 17 → the generator water outlet manifold 11 → The generator water outlet pipe 12 leads out, and finally flows back to the cold water tank for cooling, so as to realize circulating water cooling for the hollow wire inside the generator coil 16 .

Before flushing, open the inlet valve 3 of the backwashing device and the outlet valve 4 of the backwashing device, close the generator water inlet valve 1 and the generator water valve 2, pass the clean water into the backwashing device, and open the compressed air regulating valve 6 , pass 0.4-0.5MPa compressed air into the gas-water mixing tee pipe 5, after the pressure adjustment, in the gas-water mixing tee pipe 5, the compressed air will be mixed with the clean water and accelerated, and the gas-water mixing outlet pipe will 18 Enter the generator outlet pipe 12, and lead out through the generator outlet manifold 11→generator outlet manifold 17→generator coil 16→generator inlet manifold 15→generator inlet manifold 10→return pipe 9 to achieve Accelerated flushing of the dirt accumulated in the generator coil 16 from the opposite direction realizes a thorough cleaning of the water system.

In the maintenance of water-hydrogen-hydrogen and double-water internal cooling generators, the backwashing device is used, connected to the generator water system, and the compressed air and flushing water inlet pressure of the gas-water mixing tee pipe 5 are adjusted to achieve the required water flow, Flow rate, monitor the change of the gas-water mixing outlet pressure, and continuously complete the backwashing of the static and rotor waterways. During this period, the outlet and inlet of the device can also be switched to the inlet and outlet pipes of the generator, and the forward flushing can be performed in turn until the water quality requirements are met. Using this device can also realize that after backwashing is completed, use 0.5MPa compressed air alone to blow out the remaining water in the coil, and make full preparations for the next generator coil 16 maintenance and test items in advance.

The three communicating pipes of the gas-water mixing tee pipe 5 are the flushing water inlet pipe 8 , the compressed air pipe 13 and the gas-water mixing outlet pipe 18 respectively. After the flushing water and compressed air are introduced through the flushing water inlet pipe 8 and the compressed air regulating valve 6 of the backwashing device respectively, the compressed air and the flushing water are fully mixed in the gas-water mixing tee pipe 5, and the gas-water mixing outlet pipe 18 The flushing water with high flow rate and stable pressure is formed (the outlet pipe of the backwashing device is equipped with a filter to filter out the mechanical mixture in the flushing water), so as to provide the flushing water for the backwashing of the generator, and solve the continuous flushing pressure and flow rate of the generator waterway backwashing. Insufficient problem, compressed air has conventional air source conditions in the plant system of the single unit.

After years of on-site use and verification, the device is reliable in use. Only one person is required to monitor the pressure. It has a good washing effect on stubborn dirt. In the backwash maintenance project, the generator is washed to the water quality (conductivity, hardness, PH value and mechanical mixture). The total time required to pass the test is only 1 working day (8 hours), which is only 1/3 of the original flushing time. It has obvious advantages in contributing to indicators such as water circuit cleanliness, work efficiency, and water saving.

To sum up, the backwashing device of the water-cooled generator, after the flushing water and the compressed air are introduced into the flushing water inlet pipe 8 and the compressed air regulating valve 6 of the backwashing device respectively, make the compressed air and the flushing water in the gas-water mixing tee. The pipe 5 is fully mixed, and the gas-water mixing outlet pipe 18 forms flushing water with high flow rate and stable pressure, thereby providing flushing water for generator backwashing, solving the problem of insufficient pressure and flow rate for continuous flushing of generator waterway backwashing, compressed air The plant system of the generator unit has conventional air source conditions, which simplifies the operation of the flushing process, and the back flushing device accelerates the flow rate of flushing water to improve the flushing efficiency. The flushing time is shortened, and it is more convenient to thoroughly clean the stubborn adhering dirt formed on the inner wall of the coil and the water pipe when the maintenance period is tight.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A water-cooled generator backwashing device, comprising a generator water inlet valve (1), a generator water valve (2), a backwashing device inlet valve (3), a backwashing device outlet valve (4), a gas-water mixture The three-way pipe (5) and the compressed air regulating valve (6) are characterized in that: the generator water inlet valve (1) is installed on the generator water inlet pipe (7), and the generator water inlet pipe (7) is installed on the generator water inlet pipe (7). The inlet end of the generator water inlet valve (1) is connected to the flushing water inlet pipe (8), and the generator inlet pipe (7) is connected to the return pipe (9) at the outlet end of the generator inlet valve (1). and the generator water inlet manifold (10), the backwashing device inlet valve (3) is installed on the flushing water inlet pipe (8), and the flushing water inlet pipe (8) passes through the gas-water mixing tee pipe (5) A gas-water mixing outlet pipe (18) is connected, and the water outlet of the gas-water mixing outlet pipe (18) is connected to the generator water outlet manifold (11) and the generator water outlet pipe (12), and the generator water outlet pipe (12) A generator water valve (2) is installed on the generator water outlet pipe (12), and the generator water outlet pipe (12) is also connected to a return pipe (9), and a backwash device outlet valve (4) is installed on the return pipe (9). 2. A water-cooled generator backwashing device according to claim 1, characterized in that: the gas-water mixing tee pipe (5) is composed of a horizontal pipe (51) and a vertical pipe (52), and the horizontal pipe ( 51) and the vertical pipe (52) are connected to each other, the water inlet end of the horizontal pipe (51) is connected to the flushing water inlet pipe (8), the water outlet pipe of the horizontal pipe (51) is connected to the gas-water mixing outlet pipe (18), and the vertical pipe ( 52) Install the compressed air regulating valve (6) on the compressed air regulating valve (6), and connect the compressed air pipe (13) to the intake end of the compressed air regulating valve (6). 3. A water-cooled generator backwashing device according to claim 1 or 2, characterized in that: the gas-water mixing tee pipe (5) is a stainless steel pipe for tee connection. 4. A water-cooled generator backwashing device according to claim 2, characterized in that: a reverse flow block (511) is provided at the internal connection of the horizontal pipe (51) and the vertical pipe (52). 5. A water-cooled generator backwashing device according to claim 4, characterized in that: the inner wall of the reverse flow block (511) is an arc surface, and is connected with the horizontal pipe (51) and the vertical pipe (52) The rounded corners form an arc channel. 6. A water-cooled generator backwashing device according to claim 1, characterized in that: the generator water inlet manifold (10) is connected to the generator water inlet pipe (15) of the generator (14), The generator water inlet pipe (15) is connected to the generator outlet water pipe (17) through the generator coil (16), and the generator outlet water pipe (17) is connected to the generator water outlet manifold (11). 7. A water-cooled generator backwashing device according to claim 1, wherein a filter is provided in the gas-water mixing outlet pipe (18).

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