High-temperature-resistant valve control device for high-pressure steam pipeline

Abstract

The utility model discloses a high-temperature-resistant valve control device for a high-pressure steam pipeline, and belongs to the technical field of valves. A high-temperature-resistant valve control device for a high-pressure steam pipeline comprises a main pipeline, the main pipeline serves as a steam pipeline body, a through inner pipeline is arranged in the main pipeline, and a valve cavity is formed in one end of the inner pipeline; an output rod of the driving assembly penetrates through the wall body of the main pipeline into the valve cavity, and the output rod is rotationally connected with the wall body of the main pipeline; the valve part is fixedly connected with the output rod; an opening is formed in the middle of the valve part in a penetrating mode, and sealing strips are arranged on the edges of the two sides of the opening end of the valve part and fixedly connected with the edges of the opening of the valve part. And the sealing valve seat is located in the valve cavity, the sealing valve seat abuts against the interior of the valve cavity through abutting of the valve piece, and the sealing valve seat is fixedly connected to the inner wall of the valve cavity in a sealed mode. Stable sealing performance can be kept in a high-strength temperature environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, more specifically, relate to a high pressure steam pipeline is with high temperature resistance valve control device. BACKGROUND

[0002] In the operation of high pressure steam pipeline system, high temperature resistance valve as key component, its performance is good or bad directly concerns the safety and stability of system. But current high temperature resistance valve has many problems in sealing structure.

[0003] As for metal sealing structure, under the high speed scouring and high temperature erosion of high pressure steam, the sealing surface between valve seat and ball wears extremely seriously. Because the specific pressure required for metal sealing pair to reach good sealing is larger, after long-term use, sealing surface is extremely easy to appear scratch, dent and other damages, further lead to steam leakage. This not only causes a large amount of waste of energy, also poses a great threat to the safe operation of system.

[0004] Looking at the common graphite wire sealing structure again, when temperature exceeds 600 DEG C, the oxidation phenomenon of graphite sealing ring is very obvious. With the deepening of oxidation degree, the sealing performance of graphite drops sharply. At the same time, the spring matched with it also gradually loses elasticity under high temperature environment, cannot provide sustained and effective pre-tightening force for sealing structure, further intensifies the leakage risk of steam. INNOVATION CONTENT

[0005] The utility model provides a high pressure steam pipeline is with high temperature resistance valve control device, it can realize the stable sealing performance under high strength temperature environment.

[0006] The utility model discloses a high pressure steam pipeline is with high temperature resistance valve control device, including main pipeline, main pipeline is as steam pipeline main body, is provided with the inner pipeline that passes through in main pipeline, and the valve cavity is seted up to the one end of inner pipeline;Driving assembly, driving assembly is erected on the upper end of main pipeline, and the output rod of driving assembly passes through main pipeline wall body to the valve cavity, and output rod is rotatably connected with main pipeline wall body;Valve piece, valve piece is embedded in the valve cavity, and valve piece is fixedly connected with output rod;The middle part of valve piece is provided with the opening that passes through, and the opening end both sides of valve piece are provided with sealing strip, and sealing strip is fixedly connected with the opening edge of valve piece;Sealing valve seat, sealing valve seat is located in the valve cavity, and sealing valve seat is embedded with the remaining space of valve piece and valve cavity wall body, and sealing valve seat is abutted in the valve cavity through the abutment of valve piece, and sealing valve seat is sealingly fixedly connected in the valve cavity wall.

[0007] As the further improvement of the utility model, the sealing strip is made of at least flexible graphite material.

[0008] As the further improvement of the utility model, the sealing valve seat is made of at least metal graphite material.

[0009] As a further improvement of the utility model, the driving assembly comprises a driving member, a connecting frame and a rotating shaft; the output end of the driving member is connected with the rotating shaft; the rotating shaft extends through the wall body of the connecting frame into the valve cavity and is fixedly connected with the valve member; a rotating seat is arranged on the lower end of the rotating shaft in the connecting frame, the rotating seat is fixedly connected with the connecting frame, and the rotating shaft is rotatably connected with the rotating seat.

[0010] As a further improvement of the utility model, the driving member comprises a motor, a pneumatic cylinder or a hydraulic cylinder.

[0011] As a further improvement of the utility model, the two ends of the main pipeline are respectively provided with connecting flanges a and b; the upper and lower ends of the valve cavity are respectively outwardly protrudingly provided with connecting columns, the middle portions of the connecting columns are provided with through holes and pass through the wall body of the main pipeline and the wall body of the valve cavity; the bottom of the connecting column at the lower end is provided with a fixing seat, and the fixing seat is fixedly connected with the connecting column.

[0012] As a further improvement of the utility model, a hand-operated rotating shaft is arranged in the fixing seat, and a connecting end of the hand-operated rotating shaft is arranged on the end face of the fixing seat; a connecting rod is arranged on the outer wall of the hand-operated rotating shaft, the hand-operated rotating shaft is fixedly connected with the connecting rod, the connecting rod is embedded in the connecting column at the lower end, the connecting rod is rotatably connected with the connecting column at the lower end, and one end of the connecting rod, which is away from the fixing seat, is fixedly connected with the valve member.

[0013] As a further improvement of the utility model, the utility model further comprises a connecting pipeline, the main pipeline and the connecting pipeline are sealingly and detachably connected, and the main pipeline and the connecting pipeline form inner pipelines that are in communication with each other; the two ends of the connecting pipeline are respectively provided with connecting flanges c and d, wherein the connecting flange d is matched with the connecting flange b; the connecting flanges a and c are sealingly and detachably connected with the pipelines outside the two sides.

[0014] As a further improvement of the utility model, a rotation-stopping plate is further arranged in the valve cavity and is fixedly connected with the inner wall of the valve cavity; when the valve member is closed in the inner pipeline of the main pipeline, the sealing strip on the side edge of the valve member abuts against the rotation-stopping plate, and at this time, the curvature of the rotation-stopping plate is matched with the curvature of the opening edge of the valve member.

[0015] As a further improvement of the utility model, a pressing block is arranged on the front end pipe wall of the valve member in the main pipeline, the pressing block is arranged around the wall body of the inner pipeline of the main pipeline, and the pressing block is sealingly and fixedly connected with the wall body of the inner pipeline of the main pipeline; when the valve member is in the closed state, the opening edge of the valve member abuts against the pressing block, and the opening edge of the valve member is seamlessly connected with the pressing block in the pressing state.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The structural design of the scheme is more reasonable, and each component cooperates. The output rod of the driving assembly is rotationally connected with the wall body of the main pipeline, can stably drive the valve piece, and solves the instability problem that may exist in the existing valve driving. The cooperation of the valve piece and the sealing valve seat, compared with the traditional sealing structure, the sealing valve seat is embedded in the remaining space of the valve piece and the valve cavity wall body and is sealingly and fixedly connected with the inner wall of the valve cavity, the stability of the sealing is enhanced, the steam leakage is effectively reduced, and the safe and stable operation of the high-pressure steam pipeline system is ensured.

[0018] The flexible graphite material of the sealing strip is easy to oxidize compared with the graphite sealing ring in the existing graphite wire sealing structure, and the oxidation resistance of the flexible graphite material is relatively good, the sealing performance of the flexible graphite material can be maintained well in a high-temperature environment, the defect that the sealing performance of the existing graphite sealing material sharply decreases at high temperature is compensated, the service life of the sealing component is prolonged, and the sealing effect of the device is further improved; the metal graphite material of the sealing valve seat is easy to wear compared with the traditional metal sealing structure, the metal graphite material combines the strength of metal and the sealing performance of graphite, can withstand the erosion of high-pressure steam and maintain good sealing performance in a high-temperature and high-pressure environment, reduces the wear of the sealing valve seat, and enhances the reliability of the entire device under high-temperature working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic view of the utility model;

[0020] Figure 2 It is a front view structural schematic view of the pipeline when the valve is closed;

[0021] Figure 3 It is a cross-sectional structural schematic view of the pipeline when the valve is closed;

[0022] Figure 4 It is a front view structural schematic view of the pipeline when the valve is closed; Figure 3 It is an enlarged structural schematic view of position A in the utility model;

[0023] Figure 5 It is a front view structural schematic view of the pipeline when the valve is closed;

[0024] Figure 6 It is a cross-sectional structural schematic view of the pipeline when the valve is closed;

[0025] Figure 7 It is a front view structural schematic view of the pipeline when the valve is closed; Figure 6 It is an enlarged structural schematic view of position B in the utility model.

[0026] Explanation of reference numerals in the drawing:

[0027] Main pipe 1, connecting flange a11, connecting flange b12, valve cavity 13, anti-rotation plate 131, fixed seat 14, hand-cranked rotating shaft 141, connecting pipe 2, connecting flange c21, connecting flange d22, drive assembly 3, drive component 31, connecting frame 32, rotating shaft 33, rotating seat 331, valve component 4, sealing strip 41, sealing valve seat 5, clamping block 51. Detailed Implementation

[0028] Specific Implementation Example 1: Please refer to Figures 1-2 A high-temperature resistant valve control device for high-pressure steam pipelines includes a main pipeline 1, a connecting pipeline 2, a drive assembly 3, a valve component 4, and a sealing valve seat 5.

[0029] The main pipe 1 and the connecting pipe 2 are detachably and sealed, and an interconnected internal pipeline is formed within the main pipe 1 and the connecting pipe 2. The drive assembly 3 is mounted on the upper end of the main pipe 1, and the valve component 4 and the sealing valve seat 5 are both located in the internal pipeline of the main pipe 1.

[0030] Specifically, such as Figure 1 As shown, connecting flanges a11 and b12 are respectively installed at both ends of the main pipeline 1. A valve chamber 13 is opened at the end of the main pipeline 1 near the connecting flange b12. The outer wall of the valve chamber 13 protrudes from the outer wall of the main pipeline 1 to provide sufficient installation space for the valve component 4. Connecting columns protrude outward from the upper and lower ends of the valve chamber 13. A through hole is opened in the middle of the connecting column, which penetrates the wall of the main pipeline 1 and the wall of the valve chamber 13. An anti-rotation plate 131 is also installed in the valve chamber 13 and is fixedly connected to the inner wall of the valve chamber 13. A fixing seat 14 is installed at the bottom of the lower connecting column and is fixedly connected to the connecting column. A hand-cranked rotating shaft 141 is installed in the fixing seat 14. The connecting end of the hand-cranked rotating shaft 141 is opened on the end face of the fixing seat 14 so that the hand-cranked rotating shaft 141 can be rotated by rotating a hand crank. A connecting rod is sleeved on the outer wall of the hand-cranked rotating shaft 141. The hand-cranked rotating shaft 141 is fixedly connected to the connecting rod, which is embedded in the lower connecting column. The connecting rod is rotatably connected to the lower connecting column. The end of the connecting rod away from the fixed seat 14 is fixedly connected to the valve component 4. Rotation of the hand-cranked rotating shaft 141 drives the connecting rod to drive the valve component 4 to rotate, thereby opening or closing the valve component 4 in the inner pipeline of the main pipeline 1. Connecting flanges c21 and d22 are respectively provided at both ends of the connecting pipeline 2. Connecting flange d22 matches connecting flange b12, and the connecting flange b12 and connecting flange d22 are detachably and sealingly connected by fixing bolts. Connecting flanges a11 and c21 are detachably and sealingly connected to the external pipelines on both sides.

[0031] The driving assembly 3 is located at the upper end of the valve cavity 13 in the embodiment, and the driving assembly 3 comprises a driving member 31, a connecting frame 32 and a rotating shaft 33. The driving member 31 comprises a motor or a pneumatic cylinder or a hydraulic cylinder in the embodiment, and the output end of the driving member 31 is connected with the rotating shaft 33 to output the driving member 31 to the rotating shaft 33. The connecting column at the upper end of the valve cavity 13 is fixedly connected with the lower end of the connecting frame 32, and the rotating shaft 33 extends through the wall of the connecting frame 32 into the connecting column, and the rotating shaft 33 is fixedly connected with the valve member 4. The rotating shaft 33 is rotated by the driving member 31 to drive the valve member 4 to rotate, so as to open and close the pipeline in the main pipeline 1. The lower end of the rotating shaft 33 in the connecting frame 32 is provided with a rotating seat 331, and the rotating seat 331 is fixedly connected with the connecting frame 32. The rotating shaft 33 is rotatably connected with the rotating seat 331 to limit the rotating direction of the rotating shaft 33 by the rotating seat 331.

[0032] The valve member 4 is embedded in the valve cavity 13, and the valve member 4 is in a spherical shape. An opening is formed in the eccentric position of the spherical shape to form an arc wall at the opening end of the valve member 4. The edges of the openings on both sides of the valve member 4 are provided with sealing strips 41, and the sealing strips 41 are fixedly connected with the edges of the valve member 4. The sealing strips 41 are made of flexible graphite material in the embodiment. The stop plate 131 is provided with an arc, as shown in the figure. When the valve member 4 is closed in the pipeline of the main pipeline 1, the sealing strip 41 on one side of the valve member 4 abuts against the stop plate 131. At this time, the arc of the stop plate 131 matches the arc of the opening edge of the valve member 4 to abut against the stop plate 131 in the valve cavity 13 to achieve the closed state of the valve member 4. The sealing strip 41 on one side of the valve member 4 is rotated in the opposite direction of the stop plate 131 to open the valve member 4 in the pipeline of the main pipeline 1. The stop plate 131 is mainly used for manually driving the valve member 4 in the embodiment. Figure 4

[0033] ​The sealing valve seat 5 is located in the valve cavity 13, and the sealing valve seat 5 is embedded in the remaining space of the valve cavity 13 wall body of the valve element 4, the sealing valve seat 5 is abutted in the valve cavity 13 by the valve element 4, and the sealing valve seat 5 is sealingly and fixedly connected with the inner wall of the valve cavity 13. The middle part of the sealing valve seat 5 is provided with a rotating cavity matched with the valve element 4, the outer wall of the valve element 4 always abuts against the sealing valve seat 5, and the valve element 4 is sealingly and rotatably connected with the sealing valve seat 5. In this embodiment, the sealing valve seat 5 is made of metal graphite material. The sealing valve seat 5 is provided with an abutting block 51 on the front end pipe wall of the valve element 4 in the main pipeline 1, the abutting block 51 is arranged around the inner pipe wall of the main pipeline 1, and the abutting block 51 is sealingly and fixedly connected with the inner pipe wall of the main pipeline 1. When the valve element 4 is in the closed state, the opening edge of the valve element 4 abuts against the abutting block 51, and the opening edge of the valve element 4 and the abutting block 51 are seamless in the abutting state. In the flow blocking state of the main pipeline 1, the steam only enters the arc-shaped cavity in the valve element 4 and reduces the wall hanging residual.

[0034] Working principle:

[0035] The utility model discloses a valve element is rotated to the pipe of the main pipeline is opened or closed through the rotation of the valve element through the driving piece in the driving assembly. At the same time, the sealing valve seat arranged on both sides of the valve element can keep the stable sealing performance of the valve element during operation, and the sealing strip arranged on the opening edge of the two sides of the valve element can also be sealed twice through the sealing strip to ensure the sealing effect in the main pipeline. At the same time, the stop plate is arranged on the inner wall of the valve cavity in the manual driving condition, and the valve element can be guaranteed to be in the best position as the closed state through the stop plate, so that the most ideal sealing effect can be realized under the condition of manual driving.

Claims

1. A high temperature resistant valve control device for high pressure steam piping, characterized by: The utility model provides a steam valve, which comprises a main pipeline (1) serving as a steam pipeline body, an inner pipeline passing through the main pipeline (1) and provided with a valve cavity (13) at one end, a driving assembly (3) arranged on the upper end of the main pipeline (1) and having an output rod penetrating through the wall of the main pipeline (1) into the valve cavity (13) and being rotatably connected to the wall of the main pipeline (1), a valve piece (4) embedded in the valve cavity (13) and fixedly connected to the output rod, the valve piece (4) being provided with an opening in the middle part and having a sealing strip (41) fixedly connected to the opening edge on each side of the opening end, a sealing valve seat (5) located in the valve cavity (13) and embedded in the remaining space between the valve piece (4) and the wall of the valve cavity (13), the sealing valve seat (5) being abutted against the valve cavity (13) through the valve piece (4) and being sealingly and fixedly connected to the inner wall of the valve cavity (13).

2. A high temperature resistant valve control device for high pressure steam pipes according to claim 1, characterized in that: The sealing strip (41) is made of at least a flexible graphite material.

3. A high temperature resistant valve control device for high pressure steam pipes according to claim 1, characterized in that: The sealing valve seat (5) is made of at least a metal graphite material.

4. A high temperature resistant valve control device for high pressure steam pipes according to claim 1, characterized in that: The driving assembly (3) comprises a driving piece (31), a connecting frame (32) and a rotating shaft (33), the output end of the driving piece (31) is connected to the rotating shaft (33), the rotating shaft (33) extends into the valve cavity (13) through the wall of the connecting frame (32) and is fixedly connected to the valve piece (4), the lower end of the rotating shaft (33) in the connecting frame (32) is provided with a rotating seat (331), the rotating seat (331) is fixedly connected to the connecting frame (32), and the rotating shaft (33) is rotatably connected to the rotating seat (331).

5. A high temperature resistant valve control device for high pressure steam pipes according to claim 4, characterized in that: The driving piece (31) comprises a motor, a pneumatic cylinder or a hydraulic cylinder.

6. A high temperature resistant valve control device for high pressure steam pipes as claimed in claim 1, wherein: The main pipeline (1) is provided with a connecting flange a (11) and a connecting flange b (12) at two ends respectively, the upper and lower ends of the valve cavity (13) are provided with connecting columns which protrude outward, the middle part of each connecting column is provided with a through hole which penetrates through the wall of the main pipeline (1) and the wall of the valve cavity (13), and the bottom of the connecting column at the lower end is provided with a fixing seat (14) which is fixedly connected to the connecting column.

7. A high temperature resistant valve control device for high pressure steam pipes according to claim 6, characterized in that: The fixing seat (14) is provided with a hand-operated rotating shaft (141), the connecting end of the hand-operated rotating shaft (141) is provided on the end face of the fixing seat (14), the outer wall of the hand-operated rotating shaft (141) is provided with a connecting rod, the hand-operated rotating shaft (141) is fixedly connected to the connecting rod, the connecting rod is embedded in the connecting column at the lower end, the connecting rod is rotatably connected to the connecting column at the lower end, and the end of the connecting rod away from the fixing seat (14) is fixedly connected to the valve piece (4).

8. A high temperature resistant valve control device for high pressure steam pipes according to claim 6, characterized in that: The connecting pipeline (2) is detachably connected to the main pipeline (1) in a sealed manner, and the main pipeline (1) and the connecting pipeline (2) are formed with inner pipelines that are in communication with each other; the connecting pipeline (2) is provided with a connecting flange c (21) and a connecting flange d (22) at two ends thereof, wherein the connecting flange d (22) is matched with the connecting flange b (12); and the connecting flange a (11) and the connecting flange c (21) are detachably connected to the outer pipelines on two sides in a sealed manner.

9. A high temperature resistant valve control device for high pressure steam pipes according to claim 7, characterized in that: The valve cavity (13) is further provided with a rotation-stopping plate (131) which is fixedly connected to the inner wall of the valve cavity (13); when the valve element (4) is closed in the inner pipeline of the main pipeline (1), the sealing strip (41) on the side edge of the valve element (4) abuts against the rotation-stopping plate (131), and at this time, the curvature of the rotation-stopping plate (131) is matched with the curvature of the opening edge of the valve element (4).

10. A high temperature resistant valve control device for high pressure steam pipes as claimed in claim 1, wherein: The sealing valve seat (5) is provided with an abutting block (51) on the front end wall of the valve element (4) in the main pipeline (1), the abutting block (51) is arranged around the inner pipeline wall of the main pipeline (1), and the abutting block (51) is fixedly connected to the inner pipeline wall of the main pipeline (1) in a sealed manner; when the valve element (4) is in a closed state, the opening edge of the valve element (4) abuts against the abutting block (51), and the opening edge of the valve element (4) is gapless with the abutting block (51) in the abutting state.

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