A kind of antifreeze mechanism for pressure pipe of differential pressure transmitter

Abstract

The utility model discloses a differential pressure transmitter pressure pipe antifreeze mechanism, belonging to the field of steam transportation technology; it includes a throttling device and a differential pressure transmitter; the throttling device is installed on the pipeline, the positive pressure end and the negative pressure end of the differential pressure transmitter are connected to the two sides of the throttling device in the pipeline through the pressure pipe, and also includes a three-valve group, the pressure pipe is provided with a cut-off needle valve, a condensation water pot and a pressure relief needle valve; the two medium channels of the three-valve group correspond to the two pressure pipes one by one, and the end of the pressure pipe is connected to the corresponding end of the differential pressure transmitter through the corresponding medium channel. The utility model can effectively ensure the flow accuracy of the steam flowmeter in winter.

Description

Technical Field

[0001] The utility model provides a differential pressure transmitter pressure guiding pipe antifreeze mechanism, belonging to the technical field of steam transportation. Background Art

[0002] In real-time industrial production, steam flow meters can monitor the flow of steam in thermal power plants in real time and feed the data back to the control system. The control system adjusts the operating parameters of related equipment based on the feedback data to achieve flow control of various media in the thermal power plant and ensure the stable operation of the thermal power plant. By accurately controlling the flow of various media in the thermal power plant, the flow meter can help improve the production efficiency of the thermal power plant.

[0003] In addition, the application of steam flowmeter in thermal power plants also includes the situation where thermal power plants sell steam to users. At this time, the steam flowmeter can accurately measure and avoid losses caused by over- or under-measurement to both parties. In winter, the differential pressure transmitter pressure pipe will cause the flowmeter to measure inaccurately due to the low ambient temperature. Utility Model Content

[0004] In order to solve the problems existing in the background technology, the utility model discloses a differential pressure transmitter pressure pipe antifreeze mechanism. It can effectively ensure the flow accuracy of the steam flow meter in winter.

[0005] The utility model adopts the following technical solutions to achieve the above technical effects:

[0006] A differential pressure transmitter pressure pipe antifreeze mechanism, comprising a throttling device and a differential pressure transmitter; the throttling device is installed on the pipeline, the positive pressure end and the negative pressure end of the differential pressure transmitter are connected to the two sides of the throttling device in the pipeline through the pressure pipe, and also comprises a three-valve group, the pressure pipe is provided with a stop needle valve, a condensation water pot and a pressure relief needle valve;

[0007] The two medium channels of the three-valve group correspond to the two pressure-conducting pipes one by one, and the ends of the pressure-conducting pipes are connected to the corresponding ends of the differential pressure transmitter through the corresponding medium channels.

[0008] Furthermore, one end of the pressure relief needle valve is connected to the pressure guiding pipe, and the other end is connected to the outside for pressure relief.

[0009] Furthermore, on the same pressure guiding pipe, from the throttling device end to the differential pressure transmitter end, there are a stop needle valve, a condensation water pot and a corresponding medium channel in sequence.

[0010] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0011] 1. This technology effectively avoids damage to the pressure pipe and differential pressure transmitter caused by the cold winter.

[0012] 2. The use of this technology effectively ensures the flow accuracy of the steam flow meter in winter.

[0013] 3. The use of this technology effectively saves the electrical loss caused by winding the heating tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0015] In the figure: 1. Pipeline throttling device, 2. Stop needle valve, 3. Condensate kettle, 4. Pressure pipe, 5. Three-valve group, 6. Differential pressure transmitter, 7. Pressure relief needle valve DETAILED DESCRIPTION

[0016] Below, the utility model is further described in conjunction with the accompanying drawings.

[0017] Reference Figure 1 This embodiment includes a throttling device and a differential pressure transmitter; the throttling device is installed on the pipeline, and the positive pressure end and the negative pressure end of the differential pressure transmitter are connected to the two sides of the throttling device in the pipeline through a pressure guiding pipe, and the pressure guiding pipe is provided with a stop needle valve, a condensate kettle and a pressure relief needle valve; on the same pressure guiding pipe, from the throttling device end to the differential pressure transmitter end, there are the stop needle valve, the condensate kettle and the corresponding medium channel in sequence.

[0018] The two medium channels of the three-valve group correspond to the two pressure pipes one by one, and the ends of the pressure pipes are connected to the corresponding ends of the differential pressure transmitter through the corresponding medium channels. One end of the pressure relief needle valve is connected to the pressure pipe, and the other end is connected to the outside world for pressure relief.

[0019] The antifreeze usage of this embodiment is as follows:

[0020] The first step is to close the stop needle valve in front of the condensation kettle;

[0021] The second step is to open the pressure relief needle valve and then close it after the pressure is released;

[0022] The third step is to close the stop valve on the three-valve group;

[0023] Step 4: Open the water inlet on the top of the condensation kettle;

[0024] Step 5: Open the pressure relief valve and start draining water. Then, start pouring antifreeze into the condensate kettle. After the antifreeze flows out of the pressure relief valve, close the pressure relief valve.

[0025] Step 6: Continue to pour antifreeze until the condensing water pot is full, then stop pouring and close the water inlet on the top of the condensing water pot;

[0026] Step 7. Open the stop needle valve in front of the condensing kettle and the stop valve on the three-valve group.

Claims

1. A differential pressure transmitter pressure pipe antifreeze mechanism, comprising a throttling device and a differential pressure transmitter; the throttling device is installed on the pipeline, and the positive pressure end and the negative pressure end of the differential pressure transmitter are connected to the two sides of the throttling device in the pipeline through the pressure pipe, characterized in that: It also includes a three-valve group, wherein the pressure-guiding pipe is provided with a cut-off needle valve, a condensation water pot and a pressure relief needle valve; The two medium channels of the three-valve group correspond to the two pressure-conducting pipes one by one, and the ends of the pressure-conducting pipes are connected to the corresponding ends of the differential pressure transmitter through the corresponding medium channels.

2. A differential pressure transmitter pressure pipe antifreeze mechanism according to claim 1, characterized in that: One end of the pressure relief needle valve is connected to the pressure guiding pipe, and the other end is connected to the outside for pressure relief.

3. The antifreeze mechanism for the pressure pipe of a differential pressure transmitter according to claim 1, characterized in that: On the same pressure guiding pipe, from the throttling device end to the differential pressure transmitter end, there are a stop needle valve, a condensate kettle and a corresponding medium channel in sequence.

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