Steam pressure reducing valve group device

Abstract

A steam pressure reducing valve set device comprises a high-pressure steam pipeline, the high-pressure steam pipeline is connected with the first end of a first steam stop valve, the second end of the first steam stop valve is connected with the first end of a steam filter, and the second end of the steam filter is connected with the first end of a steam pressure reducing valve. A first pressure gauge is arranged on the pipeline between the steam filter and the steam pressure reducing valve, the second end of the steam pressure reducing valve is connected with the first end of a safety valve, a second pressure gauge is arranged on the pipeline between the steam pressure reducing valve and the safety valve, and the second end of the safety valve is connected with the first end of a second steam stop valve. And the second end of the second steam stop valve is connected with a low-pressure steam pipeline. The steam generator can provide high-efficiency, high-stability, high-accuracy and high-safety steam energy, is convenient to maintain, improves the energy utilization rate in industrial production, and reduces energy waste.

Description

TECHNICAL FIELD

[0001] The utility model relates to physical field especially, relates to steam equipment, and particularly is a kind of steam pressure reducing valve group device. BACKGROUND

[0002] Steam, as important secondary energy, is widely used in many industrial fields, and steam system consumption has become an important field of energy consumption. With the increasing demand of people on product quality, the pressure requirement of steam is also higher and higher in many industrial productions, and in the production process, efficient, accurate and stable pressure steam source is needed, so as to guarantee the accurate temperature control of product. At the same time, as a relatively dangerous energy, steam will have the security risk of explosion when the pressure in the pipeline is high. However, there is a lack of a stable, safe, efficient and easy-to-maintain steam pressure reducing device in the prior art, which makes it difficult to provide efficient, stable, accurate and safe steam energy and improve the energy utilization rate in industrial production. SUMMARY

[0003] The utility model aims at providing a kind of steam pressure reducing valve group device, the steam pressure reducing valve group device described herein solves the technical problem that there is a lack of a stable, safe, efficient and easy-to-maintain steam pressure reducing device in the prior art.

[0004] The steam pressure reducing valve group device of the utility model, including high-pressure steam pipeline, high-pressure steam pipeline is connected with the first end of a first steam stop valve, the second end of first steam stop valve is connected with the first end of a steam filter, the second end of steam filter is connected with the first end of a steam pressure reducing valve, first pressure gauge is arranged on the pipeline between steam filter and steam pressure reducing valve, the second end of steam pressure reducing valve is connected with the first end of a safety valve, second pressure gauge is arranged on the pipeline between steam pressure reducing valve and safety valve, the second end of safety valve is connected with the first end of a second steam stop valve, the second end of second steam stop valve is connected with low-pressure steam pipeline;

[0005] The high-pressure steam pipeline is also connected with the first end of a third steam stop valve, and the second end of the third steam stop valve is connected with the first end of the safety valve through a pipeline.

[0006] The first end of the steam pressure reducing valve, or the first end of the steam filter, or the first end of the first steam stop valve is connected with a first drain valve group, and the second end of the steam pressure reducing valve is connected with a second drain valve group, and the first drain valve group and the second drain valve group are both connected with a condensate recovery pipeline.

[0007] Further, the first hydrophobic valve group comprises a first manual stop valve, a pipeline between the high-pressure steam pipeline and the first steam stop valve is connected with the first end of the first manual stop valve through a pipeline, the second end of the first manual stop valve is connected with the first end of a first hydrophobic valve, the second end of the first hydrophobic valve is connected with the first end of a first check valve, the second end of the first check valve is connected with the first end of a second manual stop valve, and the second end of the second manual stop valve is connected with a condensate water recovery pipeline.

[0008] Further, the second hydrophobic valve group comprises a third manual stop valve, the second end of the steam pressure reducing valve is connected with the first end of the third manual stop valve through a pipeline, the second end of the third manual stop valve is connected with the first end of a second hydrophobic valve through a pipeline, the second end of the second hydrophobic valve is connected with the first end of a second check valve through a pipeline, the second end of the second check valve is connected with the first end of a fourth manual stop valve through a pipeline, and the second end of the fourth manual stop valve is connected with a condensate water recovery pipeline.

[0009] Further, the first steam stop valve, the second steam stop valve, the first manual stop valve, the second manual stop valve, the third manual stop valve and the fourth manual stop valve are all manual corrugated pipe sealing stop valves.

[0010] Further, the first hydrophobic valve and the second hydrophobic valve are both float ball hydrophobic valves.

[0011] Further, the first check valve and the second check valve are both disc check valves.

[0012] Further, the steam filter is a Y-shaped filter, the Y-shaped filter is made of nodular cast iron material, a stainless steel filter screen is used as the filter screen of the Y-shaped filter, and the filtering precision is 100 mesh.

[0013] Further, a blowdown valve or a drain valve is connected with the valve cap of the Y-shaped filter through a threaded hole.

[0014] Further, the steam pressure reducing valve is a self-acting pilot valve pressure regulating valve.

[0015] Further, the safety valve is a full-travel safety valve.

[0016] Compared with the prior art, the effect of the steam pressure reducing valve group device is positive and obvious. The steam pressure reducing valve group device can provide high-efficiency, high-stability, high-accuracy and high-safety steam energy, is convenient to maintain, improves the energy utilization rate in industrial production, and reduces energy waste. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the steam pressure reducing valve group device. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included within the protection scope of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0019] like Figure 1 As shown, a steam pressure reducing valve assembly of this utility model includes a high-pressure steam pipe 17, which is connected to the first end of a first steam shut-off valve 1. The second end of the first steam shut-off valve 1 is connected to the first end of a steam filter 2. The second end of the steam filter 2 is connected to the first end of a steam pressure reducing valve 4. A first pressure gauge 3 is installed on the pipe between the steam filter 2 and the steam pressure reducing valve 4. The second end of the steam pressure reducing valve 4 is connected to the first end of a safety valve 6. A second pressure gauge 5 is installed on the pipe between the steam pressure reducing valve 4 and the safety valve 6. The second end of the safety valve 6 is connected to the first end of a second steam shut-off valve 7. The second end of the second steam shut-off valve 7 is connected to a low-pressure steam pipe 18.

[0020] The high-pressure steam pipeline 17 is also connected to the first end of a third steam shut-off valve 8, and the second end of the third steam shut-off valve 8 is connected to the first end of the safety valve 6 through a pipeline.

[0021] A first steam trap assembly is connected to the first end of the steam pressure reducing valve 4, or the first end of the steam filter 2, or the first end of the first steam shut-off valve 1. A second steam trap assembly is connected to the second end of the steam pressure reducing valve 4. Both the first and second steam trap assemblies are connected to a condensate recovery pipeline 19.

[0022] Furthermore, the first steam trap assembly includes a first manual shut-off valve 9. The pipe between the high-pressure steam pipe 17 and the first steam shut-off valve 1 is connected to the first end of the first manual shut-off valve 9 via a pipe. The second end of the first manual shut-off valve 9 is connected to the first end of a first steam trap 10. The second end of the first steam trap 10 is connected to the first end of a first check valve 11. The second end of the first check valve 11 is connected to the first end of a second manual shut-off valve 12. The second end of the second manual shut-off valve 12 is connected to the condensate recovery pipe 19.

[0023] Further, the second water trap group comprises a third manual stop valve 13, the second end of the steam pressure reducing valve 4 is connected with the first end of the third manual stop valve 13 through a pipeline, the second end of the third manual stop valve 13 is connected with the first end of a second water trap 14 through a pipeline, the second end of the second water trap 14 is connected with the first end of a second check valve 15 through a pipeline, the second end of the second check valve 15 is connected with the first end of a fourth manual stop valve 16 through a pipeline, and the second end of the fourth manual stop valve 16 is connected with the condensate water recovery pipeline 19.

[0024] Further, the first steam stop valve 1, the second steam stop valve 7, the first manual stop valve 9, the second manual stop valve 12, the third manual stop valve 13 and the fourth manual stop valve 16 are all manual corrugated pipe sealing stop valves with throttle valve cores and valve rod locking devices, which are commonly used in steam and condensate water systems for stopping steam and are made of nodular cast iron and connected through flanges.

[0025] Further, the first water trap 10 and the second water trap 14 are both float ball water traps.

[0026] Further, the first check valve 11 and the second check valve 15 are both disc check valves.

[0027] Further, the steam filter 2 is a Y-shaped filter made of nodular cast iron, and the filter screen of the Y-shaped filter is a stainless steel filter screen with a filtering precision of 100 mesh.

[0028] Further, a blowdown valve or a drain valve is connected with the bonnet of the Y-shaped filter through a threaded hole.

[0029] Further, the steam pressure reducing valve 4 is a self-acting pilot valve pressure regulating valve.

[0030] Further, the safety valve 6 is a full stroke safety valve.

[0031] Specifically, the specific structure and principle of the steam stop valve, the steam filter, the steam pressure reducing valve 4, the pressure gauge, the safety valve 6, the manual stop valve 9, the water trap and other components in the embodiment and other unexplained places all adopt the known solutions in the prior art, which are known to those skilled in the art, and will not be described here.

[0032] Working principle of the embodiment:

[0033] Before the steam pressure reducing valve group device is used, the steam pipeline needs to be blown by steam to prevent sundries from being left in the pipeline during pipeline welding, affecting the use of subsequent equipment. First, disconnect the front end pipeline of the first steam stop valve 1, the first manual stop valve 9 and the third steam stop valve 8, blow for a certain period of time, and then connect the front end pipeline of the first steam stop valve 1, the third steam stop valve 8 and the first manual stop valve 9. The steam pipeline blowing is only needed when it is used for the first time.

[0034] When the factory needs steam production, the first steam stop valve 1 needs to be closed, the first manual stop valve 9 and the second manual stop valve 12 need to be opened, and the condensate water in the front end pipeline of the first steam stop valve 1 needs to be drained. Then open the second steam stop valve 7, the third manual stop valve 13 and the fourth manual stop valve 16, and drain the condensate water in the rear end pipeline of the steam pressure reducing valve 4. After that, close the third steam stop valve 8, open the steam pressure reducing valve 4, and the steam is reduced by the steam pressure reducing valve 4 and then output to the low-pressure steam pipeline 18. By observing the first pressure gauge 3 on the front side of the steam pressure reducing valve 4 and the second pressure gauge 5 on the rear side, whether the steam pressure reducing valve 4 is running normally can be detected.

[0035] During the use of the steam pressure reducing valve group device, regular maintenance and repair are needed. When the steam pressure reducing valve group device needs to be repaired, the first steam stop valve 1 and the second steam stop valve 7 need to be closed to ensure that there is no steam entering the front and rear of the steam pressure reducing valve 4. At the same time, if the downstream equipment needs to use steam urgently, the third steam stop valve 8 can be temporarily opened for emergency use, but it also needs to be confirmed whether the downstream equipment can withstand the pressure of high-pressure steam. After the steam pressure reducing valve 4 is repaired, the first steam stop valve 1 and the second steam stop valve 7 are opened, and the third steam stop valve 8 is closed. By observing the first pressure gauge 3 and the second pressure gauge 5 on the front and rear of the steam pressure reducing valve 4, whether the steam pressure reducing valve 4 can run normally can be checked.

[0036] When the steam system needs to be maintained or repaired, the steam pipeline needs to be stopped to prevent the generation of condensate water. Close the first steam stop valve 1 and the second steam stop valve 7, close the first manual stop valve 9 and the second manual stop valve 12, repair the first steam trap 10, close the third manual stop valve 13 and the fourth manual stop valve 16, and repair the steam trap 15. After the steam trap is repaired, open the first manual stop valve 9 and the second manual stop valve 12, open the third manual stop valve 13 and the fourth manual stop valve 16, open the second steam stop valve 7, and then open the first steam stop valve 1 and the steam pressure reducing valve 4. By observing the first pressure gauge 3 and the second pressure gauge 5 on the front and rear of the steam pressure reducing valve 4, whether the steam pressure reducing valve 4 can run normally can be detected.

[0037] For the normal operation of the factory, steam equipment as an important energy equipment, must be regularly maintained and repaired, steam pressure reducing valve group device must be installed in the place convenient for maintenance and maintenance, at the same time, steam as high temperature and high pressure energy, there is a certain danger, steam pressure reducing valve group device must have safety protection equipment around, in order to ensure the normal maintenance and operation of the equipment. When checking and maintaining, not only need to check the steam pressure reducing valve 4, also need to check the safety valve 6, ensure that the safety valve 6 is not failure, can jump under high pressure.

[0038] The first steam stop valve 1 and the second steam stop valve 7 are respectively located at the front end and the rear end of the steam pressure reducing valve 4, which is used for steam stop when repairing the steam pressure reducing valve 4.

[0039] The caliber of the steam stop valve is selected according to the steam flow and steam pressure, and in general case, the flow rate is not more than 40 m / s. The material of the steam pressure reducing valve 4 is selected as nodular cast iron material.

[0040] The valve core of the steam pressure reducing valve 4 is divided into yellow, blue and red, the main valve is single valve seat, the hard alloy valve core is treated, the pilot valve is directly installed on the main valve through bolts, and the valve can be closed without load. According to different steam flow and steam pressure, steam pressure reducing valve 4 with different size and valve core is selected. The steam pressure reducing valve 4 with 25P is accurate and reliable, which can reduce the steam from high pressure to the effective working range of the equipment, and prevent the damage of the equipment.

[0041] The pressure gauge is used to observe the steam pressure before and after the steam pressure reducing valve 4, the range of the pressure gauge is selected according to the steam pressure, and the visual pressure gauge is generally selected, so that the steam pressure can be observed directly. In order to meet the standard of steam pressure inspection, the range unit of the pressure gauge needs to be displayed by Mpa, or the pressure gauge with double unit display is selected. The steam pressure gauge is different from the pressure gauge in other systems, which needs to be configured with a manual ball valve and a steam pressure curve pipe for steam expansion and maintenance of the pressure gauge.

[0042] The safety valve 6 is connected through the flange, and the material is nodular cast iron, which is suitable for protection application in the steam system. According to the steam flow and steam pressure of the downstream equipment, the type is selected, and the trip pressure of the safety valve 6 is set before the equipment is delivered. The setting of the trip pressure is generally 1.1 times of the downstream use pressure, which can ensure the safe operation of the equipment. When installing, it should be ensured that the center line of the spring cavity of the safety valve 6 is perpendicular upward.

[0043] Two sets of drain valve groups are respectively located at the front end of the steam pressure reducing valve 4 and the rear end of the steam pressure reducing valve 4, which are used for conveying the condensate water remaining in the pipeline. In order to ensure the normal use of the steam pressure reducing valve 4, it is necessary to ensure that the steam pressure reducing valve 4 is not soaked by the condensate water and prevent the residual condensate water from remaining in the steam pressure reducing valve 4, otherwise it will affect the use accuracy of the steam pressure reducing valve 4, and the flow and pressure of the reduced steam will fluctuate.

[0044] The float trap is made of austenitic stainless steel, with an automatic air release valve, a cast iron valve cover plated with nickel, and good corrosion resistance. It can be maintained online without disassembling the pipeline. The model and size of the trap are selected according to the pressure and flow rate, and the condensate must be completely drained. The installation direction of the trap must be consistent with the direction of the steam flow and the arrow on the valve body. The position of the float arm must be horizontal, and the float ball must be able to rise and fall freely.

[0045] The first and second check valves 11 and 15 can ensure the correct flow of condensate and prevent backflow. The check valve is a disc check valve, the valve body is made of austenitic stainless steel, and it is designed to be installed between flanges. Only when the condensate flows forward, the disc of the valve will open, and before the condensate flows backward, the disc will be closed by the spring force.

Claims

1. A steam pressure-reducing valve group apparatus characterized by comprising: The high-pressure steam pipe is connected with the first end of a first steam stop valve, the second end of the first steam stop valve is connected with the first end of a steam filter, the second end of the steam filter is connected with the first end of a steam pressure reducing valve, a first pressure gauge is arranged on the pipe between the steam filter and the steam pressure reducing valve, the second end of the steam pressure reducing valve is connected with the first end of a safety valve, a second pressure gauge is arranged on the pipe between the steam pressure reducing valve and the safety valve, the second end of the safety valve is connected with the first end of a second steam stop valve, and the second end of the second steam stop valve is connected with a low-pressure steam pipe. The high-pressure steam pipe is also connected with the first end of a third steam stop valve, and the second end of the third steam valve is connected with the first end of the safety valve through a pipe. The first end of the steam pressure reducing valve, or the first end of the steam filter, or the first end of the first steam stop valve is connected with a first drain valve group, and the second end of the steam pressure reducing valve is connected with a second drain valve group, and the first drain valve group and the second drain valve group are both connected with a condensate recovery pipeline.

2. A steam reducing valve group assembly according to claim 1, wherein The first drain valve group comprises a first manual stop valve, the pipe between the high-pressure steam pipe and the first steam stop valve is connected with the first end of the first manual stop valve through a pipe, the second end of the first manual stop valve is connected with the first end of a first drain valve, the second end of the first drain valve is connected with the first end of a first check valve, the second end of the first check valve is connected with the first end of a second manual stop valve, and the second end of the second manual stop valve is connected with the condensate recovery pipeline.

3. A steam reducing valve group assembly according to claim 2, wherein The second drain valve group comprises a third manual stop valve, the second end of the steam pressure reducing valve is connected with the first end of the third manual stop valve through a pipe, the second end of the third manual stop valve is connected with the first end of a second drain valve through a pipe, the second end of the second drain valve is connected with the first end of a second check valve through a pipe, the second end of the second check valve is connected with the first end of a fourth manual stop valve through a pipe, and the second end of the fourth manual stop valve is connected with the condensate recovery pipeline.

4. A steam reducing valve group assembly according to claim 3, wherein The first steam stop valve, the second steam stop valve, the first manual stop valve, the second manual stop valve, the third manual stop valve, and the fourth manual stop valve are all manual corrugated pipe sealing stop valves.

5. The steam reducing valve group apparatus according to claim 3, wherein The first drain valve and the second drain valve are both float ball drain valves.

6. A steam reducing valve group assembly according to claim 3, wherein The first check valve and the second check valve are both disc-type check valves.

7. The group of steam reducing valves according to claim 1, characterized in that, The steam filter is a Y-shaped filter, the Y-shaped filter is made of nodular cast iron material, the filter screen of the Y-shaped filter is made of stainless steel filter screen, and the filtering precision is 100 mesh.

8. A steam reducing valve group assembly according to claim 7, wherein A blowdown valve is connected with the valve cap of the Y-shaped filter through a threaded hole.

9. The group of steam reducing valves according to claim 1, characterized in that, The steam pressure reducing valve is a self-acting pilot valve pressure regulating valve.

10. The steam reducing valve group apparatus according to claim 1, wherein The safety valve is a full-stroke safety valve.

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