Steel valve with internal anti-corrosion coating and external sealing protection

Abstract

The utility model discloses a steel valve with an inner anti-corrosion coating and an outer sealing protection layer, which relates to the technical field of steel valves, and comprises a valve structure, a first sealing ring and a protective coating, the left end and the right end of the valve structure are respectively provided with a connecting flange, and the first sealing ring is embedded in the surface of one side, far away from the valve structure, of the connecting flange. The protective coating completely covers the surface of the inner wall of the whole valve structure. According to the steel valve with the internal anti-corrosion coating and the sealing protection function, through the use of a first sealing ring, a second sealing ring and a third sealing ring, when the valve structure is connected and combined with a pipeline through a connecting flange and when the opening and closing structure is connected and combined with the valve structure through a fixing base, the sealing protection function is achieved; due to the fact that the protective coating is sprayed on the surface of the inner wall of the valve body, and the protective coating is made of polytetrafluoroethylene materials, the valve structure can be suitable for extremely severe working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel valve technical field, concretely is a steel valve of internal anticorrosive coating outer additional seal protection. BACKGROUND

[0002] Steel valve refers to the valve made of steel, mainly used for controlling fluid flow. Steel valve has various types, including steel gate valve and stainless steel knife gate valve;

[0003] Steel valve is widely used in various industrial fields, including coal preparation, deslagging system of power plant, urban sewage treatment system, and food, pharmaceutical and biological engineering industries. Stainless steel knife gate valve is particularly suitable for occasions requiring rapid cutting and effective isolation of medium, such as medium containing particles or impurities.

[0004] Conventional steel valve, due to its material characteristics, when encountering relatively corrosive medium, will cause structural damage to its interior. At the same time, when the structure of the flange used for connection is connected with the pipeline, the sealing property of the flange structure is relatively limited, and the annular sealing element itself will be affected by the medium transportation, which will cause the structure to be gradually eroded and reduce the sealing effect of the structure.

[0005] Therefore, in view of the above, the existing structure and defects are improved, and a steel valve with internal anticorrosive coating and additional seal protection is proposed. INVENTION CONTENTS

[0006] The utility model discloses a steel valve with internal anticorrosive coating and additional seal protection to solve the problems raised in the background.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a steel valve with internal anticorrosive coating and additional seal protection, comprising a valve structure, a first sealing ring and a protective coating, the left and right ends of the valve structure are provided with a connecting flange, the first sealing ring is embedded on the surface of the connecting flange away from the valve structure, and the outer diameter of the first sealing ring is provided with a second sealing ring, the top end of the middle part of the valve structure is provided with a fixed seat, and the middle part of the fixed seat is vertically penetrated by an opening and closing structure, and the connecting part of the fixed seat and the valve structure is provided with a third sealing ring, and the protective coating completely covers the inner wall surface of the entire valve structure.

[0008] Further, the valve structure comprises a valve body, a butt joint seat, a reinforcing rib, a partition structure and a limiting ring, the upper end of the middle part of the valve body is provided with a butt joint seat, the surface of the valve body is transversely connected with a reinforcing rib, the inner middle segment of the valve body is provided with a partition structure, and the middle part of the partition structure is provided with a circular through hole structure and a limiting ring on the inner wall surface.

[0009] Further, the valve body, the butt joint seat, the reinforcing ribs, the partition structure and the limiting ring are arranged in an integrated structure.

[0010] Further, the butt joint seat and the fixed seat are connected and combined with each other by a flange structure, and the butt joint seat and the fixed seat are provided with groove structures matched with the side surface structures of the third sealing rings on the side surfaces close to the third sealing rings.

[0011] Further, the butt joint seat and the fixed seat are connected and combined with each other by a flange structure, and the butt joint seat and the fixed seat are provided with groove structures matched with the side surface structures of the third sealing rings on the side surfaces close to the third sealing rings.

[0012] Further, the butt joint seat and the fixed seat are connected and combined with each other by a flange structure, and the butt joint seat and the fixed seat are provided with groove structures matched with the side surface structures of the third sealing rings on the side surfaces close to the third sealing rings.

[0013] Further, the valve body, the butt joint seat, the reinforcing ribs, the partition structure and the limiting ring are arranged in an integrated structure.

[0014] Further, the valve body, the butt joint seat, the reinforcing ribs, the partition structure and the limiting ring are arranged in an integrated structure.

[0015] The utility model provides a steel valve with internal anticorrosive coating and external sealing protection has the following advantages

[0016] Beneficial effects:

[0017] 1. The utility model, through the surface of the interface flange inlaying has the interface flannic, first sealing ring, is provided with third sealing ring simultaneously in the interface between valve structure and fixed base, wherein the outer diameter surface ring array of first sealing ring and third sealing ring is provided with six groups of convex structure, and the inner diameter surface ring array of first sealing ring is provided with six groups of convex structure, cooperate in the side surface of the interface flange, and the recess of corresponding structure opened in the top of butt joint base and the bottom surface of fixed base, when valve structure is connected with pipeline each other combination through the interface flange, and when opening and closing structure is connected with valve structure each other combination through fixed base, the interface between each other has enough structure sealing property, also avoids the problem of unnecessary structure displacement loosening of first sealing ring, second sealing ring and third sealing ring as far as possible in use, to this end guarantees structure sealing effect, in addition, since the surface of first sealing ring, second sealing ring and third sealing ring all are sprayed with fluorocarbon coating protective layer, since fluorocarbon coating has stable performance under humid, acid and alkali and other harsh environment, and its wear resistance is excellent, the service life of first sealing ring, second sealing ring and third sealing ring can be effectively guaranteed, and the maintenance of its structure is reduced.

[0018] 2. The utility model discloses a protective coating is sprayed on the inner wall surface of valve body, wherein the protective coating is made of polytetrafluoroethylene material, since polytetrafluoroethylene coating has extremely excellent corrosion resistance, can resist the corrosion of all strong acid, strong alkali, strong oxidizing agent and other chemical media, so that the valve structure can be suitable for extremely harsh working conditions, to improve the overall application range of valve structure, and guarantee its service life, in addition, the reinforcing rib is arranged on the outer surface of valve body in ring array, which can improve the structural strength of valve body to a certain extent, and the limiting ring arranged in the middle of the separation structure can avoid the excessive structural displacement when the valve plug is pushed into the circular opening structure in the middle of the separation structure, and the limiting ring and the valve plug cooperate with each other, so that the internal structure of the valve structure has good structural sealing property when the internal structure is closed under the action of the opening and closing structure, and unnecessary structural leakage is avoided. ACCURACY OF DRAWINGS

[0019] Fig. 1 It is the body axis side view structural diagram of the utility model of a kind of steel valve of inner anticorrosive coating outer additional sealing protection;

[0020] Fig. 2 It is the body internal structure diagram of the utility model of a kind of steel valve of inner anticorrosive coating outer additional sealing protection;

[0021] Fig. 3 It is the body explosion structural diagram of the utility model of a kind of steel valve of inner anticorrosive coating outer additional sealing protection.

[0022] In the diagram: 1. Valve structure; 101. Valve body; 102. Connecting seat; 103. Reinforcing rib; 104. Separation structure; 105. Limiting ring; 2. Connecting flange; 3. First sealing ring; 4. Second sealing ring; 5. Fixed seat; 6. Opening and closing structure; 601. Screw; 602. Valve disc; 603. Valve plug; 7. Third sealing ring; 8. Protective coating. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] like Figs. 1-3 As shown, a steel valve with an internal anti-corrosion coating and external sealing protection includes a valve structure 1, a first sealing ring 3, and a protective coating 8. Connecting flanges 2 are provided at both ends of the valve structure 1. The first sealing ring 3 is fitted into the surface of the connecting flange 2 away from the valve structure 1, and a second sealing ring 4 is provided on the outer diameter side of the first sealing ring 3. A fixed seat 5 is installed at the top center of the valve structure 1, and an opening / closing structure 6 vertically penetrates the center of the fixed seat 5. A third sealing ring 7 is installed at the connection between the fixed seat 5 and the valve structure 1. The protective coating 8 completely covers the entire inner wall surface of the valve structure 1. The opening / closing structure 6 includes a screw 601, a valve disc 602, and a valve plug 603. The valve disc 602 is installed at the top of the screw 601, and the valve plug 603 is installed at the bottom of the screw 601. The structure of the outer surface of the valve plug 603 is related to the separation structure. The circular through-hole structure in the middle of structure 104 is matched with each other. The threaded rod 601 passes through the middle of the fixed seat 5. The protective coating 8 is made of polytetrafluoroethylene. The surfaces of the first sealing ring 3, the second sealing ring 4 and the third sealing ring 7 are all coated with a protective layer made of fluorocarbon paint. The outer diameter surface of the first sealing ring 3 and the third sealing ring 7 is provided with six sets of protruding structures in an annular array. The inner diameter surface of the first sealing ring 3 is also provided with six sets of protruding structures in an annular array. These structures are matched with the grooves of the corresponding structures on the side surface of the connecting flange 2, the top surface of the docking seat 102 and the bottom surface of the fixed seat 5. This ensures that when the valve structure 1 is connected to the pipeline through the connecting flange 2 and when the opening and closing structure 6 is connected to the valve structure 1 through the fixed seat 5, the connection between them has sufficient structural sealing.

[0025] The valve structure 1 comprises a valve body 101, a butt joint seat 102, a reinforcing rib 103, a partition structure 104 and a limiting ring 105, the upper end of the middle part of the valve body 101 is provided with the butt joint seat 102, the surface of the valve body 101 is transversely connected with the reinforcing rib 103, the middle section of the inner part of the valve body 101 is provided with the partition structure 104, a circular through hole structure is formed in the middle part of the partition structure 104 and the limiting ring 105 is arranged on the inner wall surface thereof, the valve body 101, the butt joint seat 102, the reinforcing rib 103, the partition structure 104 and the limiting ring 105 are arranged in an integrated structure and the reinforcing rib 103 is arranged in an annular array with the valve body 101 as the center, the butt joint seat 102 and the fixed seat 5 are connected and combined with each other in a flange structure, recessed groove structures matched with the side surface structures of the third sealing ring 7 are formed in the side surfaces of the butt joint seat 102 and the fixed seat 5 close to the third sealing ring 7, the connecting flange 2 is weldedly connected with the valve body 101, recessed groove structures matched with the side surface structures of the first sealing ring 3 and the second sealing ring 4 are respectively formed in the side surface of the connecting flange 2 away from the valve body 101, a protective coating 8 is sprayed on the inner wall surface of the valve body 101, the protective coating 8 is made of polytetrafluoroethylene material, the polytetrafluoroethylene coating has excellent corrosion resistance and can resist the corrosion of almost all strong acids, strong alkalis and strong oxidizing agents, so that the valve structure 1 can be applied to extremely harsh working conditions, thereby improving the overall application range of the valve structure 1.

[0026] As shown above, Figs. 1-3 the steel valve with the inner anticorrosion coating and the additional sealing protection is used, first, when the entire valve needs to be connected and used, the two groups of first sealing rings 3 and second sealing rings 4 are respectively embedded in the recessed grooves with corresponding structures on the side surface of the connecting flange 2 on both sides of the valve structure 1, and the structural stability and accuracy after installation of the first sealing ring 3 and the second sealing ring 4 are ensured;

[0027] then the butt joint seat 102 and the fixed seat 5 connected and combined with each other in a flange structure are checked, whether the third sealing ring 7 at the joint between the two is installed in place or has unnecessary deviation problems is confirmed, then the connecting flange 2 can be connected and combined with the external pipeline, during this period, with the jointing and fixing of the connecting flange 2 and the external pipeline, the first sealing ring 3 and the second sealing ring 4 are subjected to structural extrusion at the joint and effectively ensure the structural sealing property of the joint;

[0028] When the opening and closing structure 6 needs to be used, only need to select clockwise or counterclockwise rotation valve disc 602 according to the need, make its bottom lead screw 601 vertical direction axial rotation, utilize the threaded connection structure between fixed seat 5 realizes vertical direction structure lifting adjustment, with this drives the valve plug 603 synchronous movement of the bottom end connection of lead screw 601, and control its with the relative distance between the limiting ring 105 inside the separation structure 104, with this realizes control downstream pipeline inside the medium flow and flow rate, and the surface of valve structure 1 is sprayed with the protective coating 8 made of polytetrafluoroethylene material, so that the valve structure 1 can be suitable for extremely harsh working conditions, in order to transport different medium.

[0029] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A steel valve with internal corrosion protection coating and external sealing protection, comprising a valve structure (1), a first sealing ring (3) and a protective coating (8), characterized in that: The left and right ends of the valve structure (1) are provided with connecting flanges (2), the first sealing ring (3) is embedded on the side surface of the connecting flanges (2) away from the valve structure (1), and the outer diameter of the first sealing ring (3) is provided with the second sealing ring (4), the top end of the middle part of the valve structure (1) is provided with a fixed seat (5), the middle part of the fixed seat (5) is vertically penetrated by an opening and closing structure (6), and the connecting part of the fixed seat (5) and the valve structure (1) is provided with a third sealing ring (7), and the protective coating (8) completely covers the inner wall surface of the entire valve structure (1).

2. A steel valve with internal corrosion protection coating and additional sealing protection according to claim 1, characterized in that, The valve structure (1) comprises a valve body (101), a butt joint seat (102), a reinforcing rib (103), a separation structure (104) and a limiting ring (105), the butt joint seat (102) is arranged on the middle upper end of the valve body (101), the surface of the valve body (101) is transversely connected with the reinforcing rib (103), the middle part of the valve body (101) is provided with the separation structure (104), and the middle part of the separation structure (104) is provided with a circular through hole structure and a limiting ring (105) on the inner wall surface.

3. A steel valve with internal corrosion protection coating and additional sealing protection according to claim 2, characterized in that, The valve body (101), the butt joint seat (102), the reinforcing rib (103), the separation structure (104) and the limiting ring (105) are arranged in an integrated structure, and the reinforcing rib (103) is arranged in an annular array with the valve body (101) as the center.

4. A steel valve having an internal corrosion-proof coating and an additional protective seal according to claim 2, characterized in that, The butt joint seat (102) and the fixed seat (5) are connected and combined by flange structure, and the side surfaces of the butt joint seat (102) and the fixed seat (5) near the third sealing ring (7) are provided with groove structures matched with the side surface structures of the third sealing ring (7).

5. A steel valve with internal corrosion protection coating and additional sealing protection according to claim 2, characterized in that, The butt joint flange (2) and the valve body (101) are connected by welding, and the side surfaces of the butt joint flange (2) away from the valve body (101) are respectively provided with groove structures matched with the side surface structures of the first sealing ring (3) and the second sealing ring (4).

6. A steel valve with internal corrosion protection coating and additional sealing protection according to claim 2, characterized in that, The opening and closing structure (6) comprises a lead screw (601), a valve disc (602) and a valve plug (603), the top end of the lead screw (601) is provided with the valve disc (602), and the bottom end of the lead screw (601) is provided with the valve plug (603).

7. A steel valve having an internal corrosion-proof coating and additional sealing protection according to claim 6, characterised in that, The structure of the outer surface of the valve plug (603) is matched with the circular through hole structure in the middle part of the separation structure (104), and the lead screw (601) is screwed through the middle of the fixed seat (5).

8. A steel valve having an internal corrosion-proof coating and an additional protective seal according to claim 1, characterized in that, The protective coating (8) is made of polytetrafluoroethylene material, and the surfaces of the first sealing ring (3), the second sealing ring (4) and the third sealing ring (7) are sprayed with a protective layer made of fluorocarbon paint.

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