Gas path system capable of eliminating surge phenomenon of main water feeding valve of boiler

Abstract

The utility model discloses a gas path system capable of eliminating the surge phenomenon of a boiler main water feeding valve, and belongs to the technical field of valves. A gas circuit system capable of eliminating the surge phenomenon of a boiler main feed water valve comprises a water inlet pipe connected with the main feed water valve and further comprises a water outlet pipe, a corrugated pipe is fixedly arranged between the water inlet pipe and the water outlet pipe, an inner sleeve is fixedly arranged on the inner wall of the water inlet pipe, and the end, away from the water inlet pipe, of the inner sleeve is arranged in the water outlet pipe in a sliding mode. Multiple sets of first piston cavities are formed in the water inlet pipe, first piston blocks are slidably arranged in the multiple sets of first piston cavities, and the ends, close to the first piston blocks, of the first piston cavities communicate with the interior of the water inlet pipe; the corrugated pipe is fixedly arranged between the water inlet pipe and the water outlet pipe, the first piston cavity is formed in the water inlet pipe, under the combined action of the corrugated pipe and the first piston cavity, pressure pulsation and vibration in a pipeline can be absorbed and eliminated, impact on a pipeline system is relieved, and therefore the surge phenomenon of the pipeline can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an air circuit system capable of eliminating the surging phenomenon of the main boiler feed water valve. Background Art

[0002] During the use of the main boiler feed water valve, due to reasons such as hydrodynamic instability, system resonance, fluid inertia effect, and system design defects, a surging phenomenon will occur. Surging will not only cause severe vibration and pressure fluctuations inside the pipeline system, but in the long run, it will have an adverse impact on equipment such as pipelines, valves, and pumps, leading to equipment damage, shortening the service life of the equipment, and also causing sharp fluctuations in the fluid pressure inside the pipeline system, resulting in deformation and rupture of pipelines or equipment, and even leakage of dangerous liquid materials, triggering safety accidents such as fires and explosions. Therefore, in order to improve the stability and reliability of equipment operation, reduce the maintenance and failure risks of the system, it is necessary to eliminate the surging phenomenon.

[0003] At present, in addition to optimizing the pipeline system design, shock absorbers or expansion joints are also used to eliminate the surging phenomenon. However, in the prior art, usually only one of the shock absorbers or expansion joints is used to eliminate the surging phenomenon, resulting in an insignificant effect and unable to meet the use requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the effect of eliminating the surging phenomenon is not obvious by using a shock absorber or an expansion joint alone in the prior art, and to propose an air circuit system capable of eliminating the surging phenomenon of the main boiler feed water valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An air circuit system capable of eliminating the surging phenomenon of the main boiler feed water valve includes a water inlet pipe connected to the main feed water valve, and also includes a water outlet pipe. A corrugated pipe is fixedly arranged between the water inlet pipe and the water outlet pipe, and an inner sleeve is fixedly arranged on the inner wall of the water inlet pipe. The end of the inner sleeve far away from the water inlet pipe is slidably arranged in the water outlet pipe; a plurality of first piston chambers are formed in the water inlet pipe, and a first piston block is slidably arranged in each of the plurality of first piston chambers. One end of the first piston chamber close to the first piston block is communicated with the inside of the water inlet pipe, and an air charging pipe for charging the first piston chamber is fixedly arranged on the water inlet pipe.

[0007] Preferably, in order to facilitate the charging of the plurality of first piston chambers, an annular chamber is formed in the water inlet pipe. The plurality of first piston chambers are all communicated with the annular chamber, and a pressure gauge is fixedly arranged on the annular chamber.

[0008] To prevent the bellows from overextending or shrinking, preferably, the water inlet pipe is fixedly provided with multiple groups of guide rods evenly distributed, the outer wall of the water outlet pipe is provided with multiple groups of chutes, multiple sliders are slidably arranged in the multiple chutes, and one ends of the guide rods far away from the water inlet pipe are fixedly connected to the corresponding sliders respectively.

[0009] To further improve the elimination effect, further, multiple second piston chambers are opened in the water outlet pipe, the multiple second piston chambers are distributed in a spiral shape, multiple second piston blocks are slidably arranged in the multiple second piston chambers, one ends of the multiple second piston chambers are all communicated with the inside of the water outlet pipe, and a spring is arranged in the second piston chamber, and two ends of the spring respectively abut against the second piston chamber and the second piston block.

[0010] Further, an airbag is arranged in the chute, two ends of the airbag are respectively fixedly connected to the chute and the slider, an air inlet pipe and an air outlet pipe are respectively fixedly arranged at two ends of the airbag, valves are fixedly arranged on both the air inlet pipe and the air outlet pipe, and the air outlet pipe is communicated with the inside of the second piston chamber, and an exhaust pipe with a pressure reducing valve is fixedly arranged on the second piston chamber.

[0011] Preferably, multiple cavities are opened in the water inlet pipe, the cross-sections of the multiple cavities are circular, and the diameters of the multiple cavities decrease in sequence along the liquid flow direction.

[0012] Compared with the prior art, the utility model provides a gas path system capable of eliminating the surging phenomenon of the main boiler feed water valve, and has the following beneficial effects:

[0013] 1. For the gas path system capable of eliminating the surging phenomenon of the main boiler feed water valve, by fixedly arranging a bellows between the water inlet pipe and the water outlet pipe, and opening a first piston chamber in the water inlet pipe, under the combined action of the bellows and the first piston chamber, the pressure pulsation and vibration in the pipeline can be absorbed and eliminated, and the impact on the pipeline system can be slowed down, so that the pipeline surging phenomenon can be eliminated and the elimination effect can be improved;

[0014] 2. For the gas path system capable of eliminating the surging phenomenon of the main boiler feed water valve, by opening multiple second piston chambers distributed in a spiral shape in the water outlet pipe, when the bellows extends, with the sliding of the inner sleeve, the second piston chambers can work in sequence, and the pressure pulsation generated during the fluid movement can be further eliminated, thereby reducing the surging phenomenon.

[0015] The parts not involved in the device are the same as or can be implemented by using the prior art. The utility model fixedly arranges a bellows between the water inlet pipe and the water outlet pipe, and opens a first piston chamber in the water inlet pipe. Under the combined action of the bellows and the first piston chamber, the pressure pulsation and vibration in the pipeline can be absorbed and eliminated, and the impact on the pipeline system can be slowed down, so that the pipeline surging phenomenon can be eliminated and the elimination effect can be improved. Brief Description of the Drawings

[0016] Figure 1 FIG. 1 is a schematic structural view of a gas circuit system for eliminating the surging phenomenon of the main feed water valve of a boiler according to the present utility model;

[0017] Figure 2 FIG. 2 is a sectional view of a gas circuit system for eliminating the surging phenomenon of the main feed water valve of a boiler according to the present utility model;

[0018] Figure 3 FIG. 3 is a magnified view of part A in the gas circuit system for eliminating the surging phenomenon of the main feed water valve of a boiler according to the present utility model Figure 2 ;

[0019] Figure 4 FIG. 4 is a magnified view of part B in the gas circuit system for eliminating the surging phenomenon of the main feed water valve of a boiler according to the present utility model Figure 2 .

[0020] In the figures: 1, inlet pipe; 101, inner sleeve; 102, bellows; 103, cavity; 2, outlet pipe; 201, chute; 3, first piston chamber; 301, first piston block; 302, annular chamber; 303, gas filling pipe; 4, guide rod; 401, slider; 5, second piston chamber; 501, second piston block; 502, outlet gas pipe; 503, exhaust pipe; 6, airbag; 601, inlet gas pipe. Detailed Description of the Preferred Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] Embodiment:

[0024] Refer to Figures 1-4, An air circuit system capable of eliminating the surging phenomenon of the main feed water valve of a boiler, including a water inlet pipe 1 connected to the main feed water valve. Flanges are fixedly arranged on both the water inlet pipe 1 and the water outlet pipe 2 for convenient connection. It also includes a water outlet pipe 2. A bellows 102 is fixedly arranged between the water inlet pipe 1 and the water outlet pipe 2. The material of the bellows 102 is stainless steel or carbon steel or nickel alloy, preferably stainless steel. And an inner sleeve 101 is fixedly arranged on the inner wall of the water inlet pipe 1. One end of the inner sleeve 101 away from the water inlet pipe 1 is slidably arranged in the water outlet pipe 2. Moreover, a sealing ring is fixedly arranged in the water outlet pipe 2, and the sealing ring abuts against the outer wall circumference of the inner sleeve 101, which can reduce the entry of impurities in the water into the groove of the bellows 102 and improve the use effect. When the bellows 102 is in use, it can extend or contract with the change of the pressure in the pipeline. Through the expansion and contraction of the bellows 102 itself, it can absorb the pressure pulsation and vibration in the pipeline, slow down the impact on the pipeline system, and thus can eliminate the pipeline surging phenomenon; Multiple groups of first piston chambers 3 are opened in the water inlet pipe 1. The number of the first piston chambers 3 ranges from two groups to ten groups, preferably four groups. First piston blocks 301 are slidably arranged in the four groups of first piston chambers 3. One end of the first piston chamber 3 close to the first piston block 301 is communicated with the inside of the water inlet pipe 1. And an air charging pipe 303 for charging the first piston chamber 3 is fixedly arranged on the water inlet pipe 1. The air charging pipe 303 is a prior art, which is convenient for charging the first piston chamber 3 to make the gas inside have a certain pressure. When in use, when the liquid pressure in the pipeline changes, the liquid will push the first piston block 301 to slide. Under the action of the gas pressure, it can offset or compensate the pressure in the pipeline, and can eliminate the pressure pulsation generated during fluid movement, thus reducing the surging phenomenon.

[0025] When in use, by fixedly arranging a bellows 102 between the water inlet pipe 1 and the water outlet pipe 2 and opening first piston chambers 3 in the water inlet pipe 1, under the combined action of the bellows 102 and the first piston chambers 3, it can absorb and eliminate the pressure pulsation and vibration in the pipeline, slow down the impact on the pipeline system, and thus can eliminate the pipeline surging phenomenon and improve the elimination effect; By opening multiple groups of second piston chambers 5 distributed in a spiral shape in the water outlet pipe 2, when the bellows 102 extends, it can work in sequence with the sliding of the inner sleeve 101, and can further eliminate the pressure pulsation generated during fluid movement, thus reducing the surging phenomenon.

[0026] Refer to Figure 2 and Figure 3 , An annular chamber 302 is opened in the water inlet pipe 1. Multiple groups of first piston chambers 3 are all communicated with the annular chamber 302. And a pressure gauge is fixedly arranged on the annular chamber 302. When in use, by opening the annular chamber 302, it is convenient to ventilate the multiple groups of first piston chambers 3 and make the gas pressure inside them consistent, improving the use effect.

[0027] Reference Figure 1 and Figure 2 As shown in

[0027] and Figure 1 , a plurality of groups of uniformly distributed guide rods 4 are fixedly arranged on the water inlet pipe 1. The number of the guide rods 4 is two to ten groups, preferably four groups. A plurality of groups of chutes 201 are formed on the outer wall of the water outlet pipe 2. The number of the chutes 201 is also preferably four groups, corresponding to the guide rods 4 one by one. Sliders 401 are slidably arranged in the plurality of groups of chutes 201. One ends of the guide rods 4 far away from the water inlet pipe 1 are fixedly connected with the corresponding sliders 401. During use, by fixedly arranging the guide rods 4 on the water inlet pipe 1 and slidably arranging the sliders 401 on the water outlet pipe 2, the bellows 102 can be prevented from overextending or contracting, improving the use effect.

[0028] Reference Figure 2 and Figure 4 As shown in Figure 2 and Figure 4 , a plurality of groups of second piston chambers 5 are formed in the water outlet pipe 2. The number of the second piston chambers 5 is two to ten groups, preferably four groups. The four groups of second piston chambers 5 are distributed in a spiral shape, and the included angle between adjacent two groups is 90 degrees. Second piston blocks 501 are slidably arranged in the plurality of groups of second piston chambers 5. One ends of the plurality of groups of second piston chambers 5 are all communicated with the inside of the water outlet pipe 2, and the communicating ends are abutted against the outer wall circumference of the inner sleeve 101. Springs are arranged in the second piston chambers 5, and two ends of each spring are respectively abutted against the second piston chamber 5 and the second piston block 501. During use, by forming the second piston chambers 5 distributed in a spiral shape in the water outlet pipe 2, when the bellows 102 extends, with the sliding of the inner sleeve 101, the second piston chambers 5 work in sequence, and can eliminate the pressure pulsation generated during fluid movement together with the bellows 102, thereby reducing the surging phenomenon.

[0029] Reference Figure 4 As shown in Figure 4 , an air bag 6 is arranged in the chute 201. Two ends of the air bag 6 are respectively fixedly connected with the chute 201 and the slider 401. An air inlet pipe 601 and an air outlet pipe 502 are respectively fixedly arranged at two ends of the air bag 6. Valves are fixedly arranged on the air inlet pipe 601 and the air outlet pipe 502, and the air outlet pipe 502 is communicated with the inside of the second piston chamber 5. An exhaust pipe 503 with a pressure reducing valve is fixedly arranged on the second piston chamber 5. During use, by arranging the air bag 6 in the chute 201, when the bellows 102 extends, the slider 401 can squeeze the air bag 6, and convey the gas in the air bag 6 into the second piston chamber 5, increasing the gas pressure in the second piston chamber 5, so as to further increase the effect of eliminating the pressure pulsation generated during fluid movement.

[0030] Reference Figure 2 and Figure 3, multiple groups of cavities 103 are provided in the water inlet pipe 1. The cavities 103 are provided in two to ten columns, preferably four columns, with four groups in each column. Moreover, the cross-sections of the multiple groups of cavities 103 are circular, and the diameters of the four columns of cavities 103 decrease sequentially along the liquid flow direction. During use, by providing the cavities 103 in the water inlet pipe 1, the transmission of vibration of the water inlet pipe 1 can be reduced, and the surging phenomenon can be alleviated.

[0031] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered by the protection scope of the present invention.

Claims

1. A gas circuit system capable of eliminating the surge phenomenon of a main water supply valve of a boiler, comprising a water inlet pipe (1) connected to the main water supply valve, characterized in that: Also includes: A water outlet pipe (2), wherein a corrugated pipe (102) is fixedly arranged between the water inlet pipe (1) and the water outlet pipe (2), and an inner sleeve (101) is fixedly arranged on the inner wall of the water inlet pipe (1), and an end of the inner sleeve (101) away from the water inlet pipe (1) is slidably arranged in the water outlet pipe (2); The water inlet pipe (1) is provided with a plurality of first piston chambers (3), each of which is slidably provided with a first piston block (301), one end of the first piston chamber (3) close to the first piston block (301) is connected to the water inlet pipe (1), and an inflation pipe (303) for inflating the first piston chamber (3) is fixedly provided on the water inlet pipe (1).

2. The gas circuit system capable of eliminating the surge phenomenon of the boiler main feedwater valve according to claim 1, characterized in that: An annular cavity (302) is provided in the water inlet pipe (1), a plurality of groups of the first piston cavities (3) are all connected to the annular cavity (302), and a pressure gauge is fixedly provided on the annular cavity (302).

3. The gas circuit system capable of eliminating the surge phenomenon of the boiler main feedwater valve according to claim 1, characterized in that: The water inlet pipe (1) is fixedly provided with a plurality of evenly distributed guide rods (4), the outer wall of the water outlet pipe (2) is provided with a plurality of slide grooves (201), sliders (401) are slidably provided in the plurality of slide grooves (201), and one end of the guide rod (4) away from the water inlet pipe (1) is fixedly connected to a corresponding slider (401).

4. The gas circuit system capable of eliminating the surge phenomenon of the boiler main feedwater valve according to claim 3, characterized in that: The water outlet pipe (2) is provided with a plurality of groups of second piston chambers (5), the plurality of groups of second piston chambers (5) are distributed in a spiral shape, a second piston block (501) is slidably arranged in each of the plurality of groups of second piston chambers (5), one end of each of the plurality of groups of second piston chambers (5) is connected to the water outlet pipe (2), and a spring is arranged in the second piston chamber (5), and the two ends of the spring are respectively against the second piston chamber (5) and the second piston block (501).

5. The gas circuit system capable of eliminating the surge phenomenon of the boiler main feedwater valve according to claim 4, characterized in that: An air bag (6) is arranged in the slide groove (201), and two ends of the air bag (6) are fixedly connected to the slide groove (201) and the slider (401) respectively. An air inlet pipe (601) and an air outlet pipe (502) are fixedly arranged at two ends of the air bag (6), and valves are fixedly arranged on the air inlet pipe (601) and the air outlet pipe (502). The air outlet pipe (502) is connected to the second piston chamber (5), and an exhaust pipe (503) with a pressure reducing valve is fixedly arranged on the second piston chamber (5).

6. The gas circuit system capable of eliminating the surge phenomenon of the boiler main feedwater valve according to claim 1, characterized in that: A plurality of groups of cavities (103) are provided in the water inlet pipe (1); the cross-sections of the plurality of groups of cavities (103) are circular, and the diameters of the plurality of groups of cavities (103) decrease successively along the direction of liquid flow.

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