CN205426281U - Novel water level changer sample pipeline water injection system - Google Patents

Abstract

The utility model provides a novel water injection system for the sampling pipeline of the water level transmitter, which includes a balance container, a differential pressure transmitter, a water injection pump, a balance door, a primary door on the positive pressure side, a primary door on the negative pressure side, a positive pressure Side secondary door, negative pressure side secondary door, positive pressure side sewage door, negative pressure side sewage door. The water injection method using the water injection device changes the original "top to bottom" water injection into a more reliable "bottom to top" water injection, making the operation steps simpler and more efficient. At the same time, the reliability of water level measurement is improved, the risk of potential safety hazards caused by inaccurate water level measurement of the heater is reduced, and the problems of poor water injection effect, long time consumption, and easy leakage existing in the existing water injection method are overcome.

Description

A New Water Level Transmitter Sampling Pipeline Water Injection System

technical field

The utility model relates to the technical field of thermal power generation, in particular to a novel water level transmitter sampling pipeline water injection system and a water injection method.

Background technique

The water levels of various heaters in thermal power plants are mostly measured by differential pressure transmitters. Regardless of whether the transmitter is connected to a single-chamber balance vessel or a double-chamber balance vessel, the principle of the differential pressure transmitter is to measure the differential pressure generated on the positive and negative pressure sides to obtain the reference water column and negative pressure in the sampling tube on the positive pressure side. The difference between the water levels in the side tanks to calculate the actual water level in the tanks. Therefore, it must be ensured that the sampling tube on the positive pressure side is full of water during normal use, otherwise the accuracy of the measured value will be seriously affected.

Since the negative pressure side is directly connected to the water side in the container, it is generally only necessary to vent air through the vent hole of the transmitter to ensure that the sampling tube is filled with water. The positive pressure side sampling tube is connected with the steam side in the container, so other methods are required to fill the sampling tube. During normal operation, the steam continuously enters the balance container to condense, which is enough to make up for the loss of the normal evaporation of the reference water column; but when the heater stops running for a period of time, or the water in the sampling pipe on the positive pressure side leaks out due to some reasons, then It is necessary to inject water into the sampling pipe on the positive pressure side to restore the normal measurement of the water level as soon as possible.

The commonly used water injection method is to open a water injection port on the balance container, block it by bolts or connect a valve here. Close the primary door on the positive pressure side and the primary door for negative pressure measurement, open the secondary door and balance door on the positive pressure side, and inject water from the water injection port. When injecting water, open the vent hole of the transmitter to release air to ensure that the water can be injected smoothly. This approach has several disadvantages:

1. It is impossible to ensure the elimination of the air column in the sampling tube. Since the water injection point is above the sampling tube, and the vent hole is on the transmitter below, there may be air trapped in the sampling tube during water injection and it is difficult to discharge. If an air column is accidentally left in the sampling pipe during water injection, it will cause serious deviations in the water level measurement, and may also cause violent fluctuations in the water level measurement value, causing the water level of the heater to go out of control, causing serious consequences.

2. The operation is cumbersome and time-consuming. Water filling and opening and closing of the vent hole must be done by different people, and they must be coordinated in a unified manner. However, the balance container and the transmitter are often far away and not on the same floor, so the communication is more complicated. The water injection speed must be moderate, if it is too fast, the water will overflow from the water injection port, and if it is too slow, the air column will be more likely to be generated. In order to reduce the risk of accumulating gas columns, the water injection needs to last for a long time, which is time-consuming.

3. It is easy to add leaks to the system. Since the water injection port is often sealed with bolts, frequent opening of the water injection is prone to leaks.

Aiming at the problems of poor water injection effect, long time consumption and easy leakage in the existing water injection method for the sampling tube of the water level transmitter, the utility model improves the water injection method and changes the original "top to bottom" water injection into a more reliable one. "Bottom-up" water injection makes the operation steps simpler and more efficient. At the same time, the reliability of water level measurement is improved, and the risk of potential safety hazards caused by inaccurate water level measurement of the heater is reduced.

Utility model content

The technical problem to be solved by the utility model is to provide a new type of water injection system and water injection method for the sampling pipeline of the water level transmitter. The original "top to bottom" water injection becomes a more reliable "bottom to top" type Water injection makes the operation steps easier and more efficient. At the same time, the reliability of water level measurement is improved, the risk of potential safety hazards caused by inaccurate water level measurement of the heater is reduced, and the problems of poor water injection effect, long time consumption, and easy leakage existing in the existing water injection method are overcome.

In order to solve the above technical problems, the utility model provides a new water injection system for the sampling pipeline of the water level transmitter, which includes a balance container, a differential pressure transmitter, a water injection pump, a balance door, a primary door on the positive pressure side, a negative pressure Side primary door, positive pressure side secondary door, negative pressure side secondary door, positive pressure side sewage door, negative pressure side sewage door.

Wherein, the positive pressure side secondary gate is set on the positive pressure pipeline of the differential pressure transmitter, the negative pressure side secondary gate is set on the negative pressure pipeline, and the positive pressure side secondary gate and differential pressure transmission The balance door is connected between the positive pressure line between the positive pressure line and the negative pressure line between the secondary door on the negative pressure side and the differential pressure transmission, and the secondary door on the positive pressure side is connected to the positive pressure line through the positive pressure line. The discharge door on the pressure side is connected, and the secondary door on the negative pressure side is connected to the discharge door on the negative pressure side through a negative pressure pipeline.

Wherein, the balance container is connected to the positive pressure pipeline between the secondary door on the positive pressure side and the sewage door on the positive pressure side through pipelines, and the primary door on the negative pressure side is connected to the secondary door on the negative pressure side and the negative pressure pipeline through pipelines. On the negative pressure pipeline between the side blowdown doors, the balance container is connected to the container under test through the primary door on the positive pressure side, and the primary door on the negative pressure side is also connected to the container under test.

Wherein, the drain door on the positive pressure side is equipped with a joint, one end of the joint is connected to the water injection pump through a pipeline, and the other end of the joint is connected to the drainage tank through a pipeline.

The utility model also provides a method for injecting water into the measured container by using the above-mentioned water injection device, which includes

The first step is to close the secondary door on the positive and negative pressure sides, and open the balance door;

The second step is to open the drain door on the positive pressure side and drain the water in the sampling tube;

The third step is to fasten the hose at the outlet of the water injection pump to the joint on the drain door, take a sufficient amount of chemical water with qualified water quality, and turn on the water injection pump to inject water into the positive pressure pipe;

The fourth step is to open the secondary door on the positive pressure side, and slightly open the positive and negative pressure side air release valves on the differential pressure transmitter respectively to discharge the air behind the secondary door;

The fifth step is to close the bleed valve and close the secondary door on the positive pressure side;

The sixth step is to continue to inject water until the water in the pipeline enters the balance container and flows into the container along the primary door on the positive pressure side. So far, the positive pressure side pipeline has been filled with water, close the positive pressure side sewage valve, stop the operation of the water injection pump, and the positive pressure side water injection is completed.

When the container under test is in operation and the primary door on the positive pressure side must be isolated, the original water injection port can also be opened, and water can be filled until the water overflows from the original water injection port.

The application of the water level transmitter in the water level measurement process of the sampling pipeline water injection system device.

The beneficial effects of the utility model:

The advantages of the new water level transmitter sampling pipeline water injection system and water injection method provided by the utility model are:

1. Since the original "top-down" water injection is changed to "bottom-up" water injection, the problem of gas column accumulation is fundamentally solved, and the inaccurate water level and The possibility of fluctuation reduces the hidden danger of equipment burial and improves reliability.

2. Most of the operations are completed at the differential pressure transmitter, and the balance container only needs to open the valve in advance. Most of the time, no one needs to be left, which saves manpower. Due to the fast water injection rate and good effect of the water injection pump, the water injection can reach the standard at one time, so the speed is greatly accelerated.

3. The number of times the original water injection port on the balance container is used is reduced, and the sewage door with better isolation and sealing effect is mainly used to operate, which improves the sealing of the sampling pipeline and reduces the hidden danger of leakage of the sampling system.

Description of drawings

Figure 1 - Structural diagram of the water injection system for the sampling line of the water level transmitter.

detailed description

The utility model provides a novel water injection system for the sampling pipeline of the water level transmitter, which includes a balance container, a differential pressure transmitter, a water injection pump, a balance door, a primary door on the positive pressure side, a primary door on the negative pressure side, a positive pressure Side secondary door, negative pressure side secondary door, positive pressure side sewage door, negative pressure side sewage door.

A secondary door on the positive pressure side is provided on the positive pressure line of the differential pressure transmitter, and a secondary door on the negative pressure side is provided on the negative pressure line. Between the secondary door on the positive pressure side and the differential pressure transmission The balance door is connected between the positive pressure pipeline and the negative pressure pipeline between the secondary door on the negative pressure side and the differential pressure transmission, and the secondary door on the positive pressure side passes through the positive pressure pipeline and the positive pressure side The discharge door on the negative pressure side is connected, and the secondary door on the negative pressure side is connected to the discharge door on the negative pressure side through a negative pressure pipeline.

The balance container is connected to the positive pressure pipeline between the secondary door on the positive pressure side and the sewage door on the positive pressure side through pipelines, and the primary gate on the negative pressure side is connected to the secondary door on the negative pressure side and the sewage discharge door on the negative pressure side through pipelines. On the negative pressure pipeline between the doors, the balance container is connected to the container under test through the primary door on the positive pressure side, and the primary door on the negative pressure side is also connected to the container under test.

A joint is installed on the drain door on the positive pressure side, one end of the joint is connected to the water injection pump through a pipeline, and the other end of the joint is connected to the drainage tank through a pipeline.

In order to improve the shortcomings of the original sampling tube water injection method, the utility model uses a water injection pump instead of relying on the gravity of the water itself, and instead uses the water injection pump to overcome the gravity to inject water, and the original "top-down" water injection Change to "bottom-up" water injection. The original sewage pipe was directly connected to the gutter and was designed for sewage only. After modification, the mouth of the sewage pipe is slightly separated from the drainage tank, and a joint is installed to reserve the interface for the water injection pump without affecting its sewage discharge function.

The utility model also provides a method for injecting water into the measured container by using the above-mentioned water injection device, which includes

The first step is to close the secondary door on the positive and negative pressure sides, and open the balance door;

The second step is to open the drain door on the positive pressure side and drain the water in the sampling tube;

The third step is to fasten the hose at the outlet of the water injection pump to the joint on the drain door, take a sufficient amount of chemical water with qualified water quality, and turn on the water injection pump to inject water into the positive pressure pipe;

The fourth step is to open the secondary door on the positive pressure side, and slightly open the positive and negative pressure side air release valves on the differential pressure transmitter respectively to discharge the air behind the secondary door;

The fifth step is to close the bleed valve and close the secondary door on the positive pressure side;

The sixth step is to continue to inject water until the water in the pipeline enters the balance container and flows into the container along the primary door on the positive pressure side. So far, the positive pressure side pipeline has been filled with water, close the positive pressure side sewage valve, stop the operation of the water injection pump, and the positive pressure side water injection is completed.

When the container under test is in operation and the primary door on the positive pressure side must be isolated, the original water injection port can also be opened, and water can be filled until the water overflows from the original water injection port.

The following examples are used to describe the implementation of the utility model in detail, so that the utility model can fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve technical effects in the utility model.

The utility model provides a new type of water injection system for the sampling pipeline of the water level transmitter, which includes a balance container 1, a differential pressure transmitter 2, a water injection pump, a balance door 3, a primary door 4 on the positive pressure side, and a primary valve on the negative pressure side. Door 5, positive pressure side secondary door 6, negative pressure side secondary door 7, positive pressure side sewage door 8, negative pressure side sewage door 9.

The positive pressure side secondary door 6 is set on the positive pressure pipeline of the differential pressure transmitter 2, and the negative pressure side secondary door 7 is set on the negative pressure pipeline. The balance door 3 is connected between the positive pressure pipeline between the differential transmission 2 and the negative pressure pipeline between the secondary door 7 on the negative pressure side and the differential pressure transmission 2, and the secondary door 6 on the positive pressure side It is connected to the sewage discharge door 8 on the positive pressure side through a positive pressure pipeline, and the secondary door 7 on the negative pressure side is connected to the sewage discharge door 9 on the negative pressure side through a negative pressure pipeline.

The balance container 1 is connected to the positive pressure pipeline between the secondary door 6 on the positive pressure side and the drain door 7 on the positive pressure side through pipelines, and the primary door 5 on the negative pressure side is connected to the secondary door 7 on the negative pressure side through pipelines On the negative pressure pipeline between the sewage door 9 on the negative pressure side, the balance container 1 is connected to the measured container 10 through the positive pressure side primary door 4, and the negative pressure side primary door is also connected to the measured container.

The drain door 8 on the positive pressure side is equipped with a joint, one end of the joint is connected to the water injection pump through a pipeline, and the other end of the joint is connected to the drainage tank through a pipeline.

The utility model also provides a method for injecting water into the measured container by using the above-mentioned water injection device, which includes

The first step is to close the secondary door on the positive and negative pressure sides, and open the balance door;

The second step is to open the drain door on the positive pressure side and drain the water in the sampling tube;

The third step is to fasten the hose at the outlet of the water injection pump to the joint on the drain door, take a sufficient amount of chemical water with qualified water quality, and turn on the water injection pump to inject water into the positive pressure pipe;

The fourth step is to open the secondary door on the positive pressure side, and slightly open the positive and negative pressure side air release valves on the differential pressure transmitter respectively to discharge the air behind the secondary door;

The fifth step is to close the bleed valve and close the secondary door on the positive pressure side;

The sixth step is to continue to inject water until the water in the pipeline enters the balance container and flows into the container along the primary door on the positive pressure side. So far, the positive pressure side pipeline has been filled with water, close the positive pressure side sewage valve, stop the operation of the water injection pump, and the positive pressure side water injection is completed.

All of the above-mentioned primary implementations of this intellectual property rights are not intended to limit other forms of implementations of this new product and/or new method. Those skilled in the art will, with this important information, modify the above to achieve a similar implementation. However, all modifications or transformations based on the utility model belong to reserved rights.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or remodel it into an equivalent change. Equivalent embodiment. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the protection scope of the technical solution of the utility model.

Claims (3)

1. a novel water level transmitter sampling line flood pattern, it is characterized in that, including: equalizing reservoir, pressure difference transmitter, water injecting pump, balance gate, positive pressure side once door, suction side once door, positive pressure side secondary door, suction side secondary door, positive pressure side sewage door, suction side sewage door；

The malleation pipeline of described pressure difference transmitter is provided with positive pressure side secondary door, its negative pressure line is provided with suction side secondary door, malleation pipeline between positive pressure side secondary door and pressure reduction variator and be connected between the negative pressure line between suction side secondary door and pressure reduction variator and have described balance gate, described positive pressure side secondary door is connected with positive pressure side sewage door by malleation pipeline, and described suction side secondary door is connected with suction side sewage door by negative pressure line.

2. water level transmitter sampling line flood pattern as claimed in claim 1, it is characterized in that: described equalizing reservoir is connected on the malleation pipeline between positive pressure side secondary door and positive pressure side sewage door by pipeline, suction side once door is connected in the negative pressure line between suction side secondary door and suction side sewage door by pipeline, described equalizing reservoir is connected with tested container by positive pressure side once door, and suction side once door is also connected on tested container.

3. water level transmitter sampling line flood pattern as claimed in claim 1 or 2, it is characterised in that: positive pressure side sewage door is provided with joint, and one end of joint is connected on described water injecting pump by pipeline, and the other end of joint is connected in rhone by pipeline.