Electrochemical anti-corrosion butterfly valve

Abstract

The utility model discloses an electrochemical anti-corrosion butterfly valve, which relates to the field of butterfly valves, and comprises a butterfly valve body, the butterfly valve body comprises a valve casing, the top of the valve casing is fixedly provided with a filler cylinder, the top of the filler cylinder is provided with a pneumatic device body, and the top of the pneumatic device body is provided with a limit switch transponder body; and a sealing gasket penetrates through the interior of the valve shell, and an anti-corrosion layer is fixedly connected to the interior of the sealing gasket. According to the butterfly valve, the cover plate is arranged, the corrosion risk of the butterfly valve can be reduced, the stability and durability of the butterfly valve are improved, the second sealing ring and the sealing gasket are arranged, the good sealing performance of the butterfly valve in the closed state can be ensured, medium leakage is prevented, the anti-corrosion layer is arranged, the corrosion resistance of the butterfly valve can be further enhanced, the service life of the butterfly valve is prolonged, and the service life of the butterfly valve is prolonged. And meanwhile, the first leakage-proof ring, the second leakage-proof ring and the first sealing ring are arranged, so that the sealing performance of the butterfly valve can be further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field, concretely is a kind of electrochemistry anticorrosion butterfly valve. BACKGROUND

[0002] Butterfly valve is a simple structure regulating valve, it can also be used for low-pressure pipeline medium switch control, with small size, light weight, simple structure, easy to install, open and close quickly, small flow resistance, labor-saving and other characteristics.

[0003] The existing butterfly valve in use process, since common butterfly valve simple structure easy operation, but in long time use, the scouring and corrosion effect of medium can easily let the side dimension of butterfly plate change, to affect sealing effect.

[0004] In order to overcome above-mentioned defects, prior art (application No.: 201420661478.4, application date is November 7, 2014 Chinese patent) discloses a kind of anticorrosion butterfly valve, the butterfly valve adopts cylindrical sealing ring, so increase the contact area of sealing ring, to improve sealing performance, in addition, since cylindrical sealing ring is larger than O-shaped sealing ring, so it is strong to resist aging, even if local damage can be through undamaged part, ensure sealing performance, so improve the corrosion resistance of sealing ring, on the inner surface of cylindrical sealing ring, there are multiple convex ridges along the circumference, such cylindrical sealing ring is equivalent to multiple O-shaped sealing rings, so it is equivalent to the service life of multiple sealing rings, so the service life is long.

[0005] Prior art can solve the quick detection of road pressure, although the design of cylindrical sealing ring improves sealing performance and corrosion resistance to some extent, but the overall corrosion risk of butterfly valve does not depend on sealing ring, so that the anticorrosion effect cannot be effectively carried out, and the sealing effect is poor.

[0006] Therefore we put forward electrochemistry anticorrosion butterfly valve can well solve the above problems. INVENTION CONTENTS

[0007] The utility model discloses a kind of electrochemistry anticorrosion butterfly valve, to solve the problem that the butterfly valve in current market in use is proposed in above background technology, although the design of cylindrical sealing ring improves sealing performance and corrosion resistance to some extent, but the overall corrosion risk of butterfly valve does not depend on sealing ring, so that the anticorrosion effect cannot be effectively carried out, and the sealing effect is poor.

[0008] To achieve the above object, the utility model provides the following technical scheme: a kind of electrochemistry anticorrosion butterfly valve, including butterfly valve body, the butterfly valve body includes valve shell, the top of the valve shell is fixedly installed with packing gland, the top of the packing gland is provided with pneumatic device body, the top of the pneumatic device body is provided with limit switch back signal generator body;

[0009] Further include: the inside of the valve shell is through the sealing pad, the inside of the sealing pad is fixedly connected with the anticorrosive layer, the inner wall of the both sides of the anticorrosive layer is fixedly installed with the limiting block;

[0010] The inside of the packing cylinder is through the front valve shaft, the bottom of the front valve shaft is fixedly installed with the valve plate, the bottom of the valve plate is fixedly installed with the rear valve shaft, and the tail end is through the valve shell, the outer wall of the valve plate is fixedly connected with the second sealing ring, the inside of the both sides of the second sealing ring and the valve plate is provided with the groove, and the front and rear surfaces of the valve plate are fixedly installed with the cover plate.

[0011] As a preferred technical scheme of the application, the front and rear sides of the valve shell are fixedly connected with valve seats, and the front surface of each valve seat is fixedly installed with a first sealing ring.

[0012] As a preferred technical scheme of the application, the outer wall of the front valve shaft is sleeved with a shaft sleeve, the outer wall of the front valve shaft is sleeved with a first leak-proof ring at the top of the shaft sleeve, and the bottom of the rear valve shaft is sleeved with a second leak-proof ring.

[0013] As a preferred technical scheme of the application, the valve seat and the first sealing ring are tightly fitted, and the first sealing ring is made of rubber, so that the first sealing ring made of rubber is installed on the valve seat connected by the valve shell, has good elasticity and sealing performance, and can be tightly fitted between the valve seat and the external pipeline.

[0014] As a preferred technical scheme of the application, the first leak-proof ring and the second leak-proof ring are both made of polytetrafluoroethylene, and the first leak-proof ring and the second leak-proof ring are made of high molecular materials, so that the first leak-proof ring and the second leak-proof ring made of polytetrafluoroethylene are respectively sleeved on the front valve shaft and the rear valve shaft connected by the valve plate, have a self-sealing effect, can be tightly fitted between the shaft and the packing cylinder or the valve shell, and form an effective sealing barrier.

[0015] As a preferred technical scheme of the application, the valve plate and the second sealing ring are tightly fitted, the second sealing ring and the valve plate are integrally arranged with the groove, and the groove and the limiting block are movably connected, so that the second sealing ring connected by the valve plate is tightly fitted on the sealing pad installed in the valve shell, and the second sealing ring made of silica gel and the sealing pad form a reliable sealing interface.

[0016] As a preferred technical scheme of the application, the second sealing ring and the sealing pad are matched, and the second sealing ring and the sealing pad are both made of silica gel, so that the second sealing ring and the sealing pad made of silica gel form a reliable sealing interface, thereby ensuring the good sealing performance of the butterfly valve in the closed state and preventing medium leakage.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] The electrochemical corrosion prevention butterfly valve, through the cover plate, can reduce the corrosion risk of the butterfly valve, improve the stability and durability, and the second sealing ring and the sealing gasket are arranged, which can ensure the good sealing performance of the butterfly valve in the closed state, prevent the medium leakage, and the corrosion prevention layer is arranged, which can further enhance the corrosion resistance and prolong the service life of the butterfly valve, and the first leakage prevention ring, the second leakage prevention ring and the first sealing ring are arranged, which can further increase the sealing performance of the butterfly valve, and the specific content is shown as follows:

[0019] 1. The cover plate is arranged, the valve plate, the valve shell and the cover plate are matched with each other, the impact force of the medium is effectively dispersed, the formation of turbulent flow and vortex flow is reduced, the corrosion risk is reduced, and the direct impact on the valve plate is reduced, so that the stability and durability of the butterfly valve are improved;

[0020] Further, the second sealing ring and the sealing gasket are arranged, the valve plate, the second sealing ring, the valve shell and the sealing gasket are matched with each other, so that the good sealing performance of the butterfly valve in the closed state is ensured, and the medium leakage is prevented;

[0021] Further, the corrosion prevention layer is arranged, the sealing gasket and the corrosion prevention layer are matched with each other, the corrosion of the medium can be resisted, the corrosion resistance can be further enhanced, and the service life of the butterfly valve is prolonged;

[0022] 2. The first leakage prevention ring and the second leakage prevention ring are arranged, the first leakage prevention ring, the second leakage prevention ring, the valve plate, the front valve shaft and the rear valve shaft are matched with each other, so that the leakage of the upper and lower shaft ends is prevented;

[0023] Further, the first sealing ring is arranged, the valve shell, the valve seat and the first sealing ring are matched with each other, and the sealing performance of the butterfly valve is further increased. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view structure schematic diagram of the utility model;

[0025] Figure 2 It is a butterfly valve body local structure schematic diagram of the utility model;

[0026] Figure 3 It is a valve shell and packing tube local section structure schematic diagram of the utility model;

[0027] Figure 4 It is a valve plate local section structure schematic diagram of the utility model;

[0028] Figure 5 It is a butterfly valve body of the utility model Figure 1 Enlarged structure schematic diagram of A place in the utility model;

[0029] Figure 6 It is a butterfly valve body of the utility modelFigure 3 Amplification structure schematic diagram at B.

[0030] In the figure: 1, butterfly valve body; 2, valve shell; 3, packing barrel; 4, pneumatic device body; 5, limit switch return transmitter body; 6, valve seat; 7, first sealing ring; 8, sealing gasket; 9, anticorrosive layer; 10, limiting block; 11, front valve shaft; 12, shaft sleeve; 13, first leak-proof ring; 14, valve plate; 15, rear valve shaft; 16, second leak-proof ring; 17, second sealing ring; 18, groove; 19, cover plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] Please refer to Figures 1-6 The utility model provides the following technical scheme:

[0033] Embodiment one: in order to solve the problem that although the design of the cylindrical sealing ring improves the sealing performance and corrosion resistance to a certain extent, the overall corrosion risk of the butterfly valve is not only determined by the sealing ring, thereby the anticorrosive effect cannot be effectively carried out, and the sealing effect is poor, can refer to the attached Figure 1 -attached Figure 5 , including butterfly valve body 1, butterfly valve body 1 includes valve shell 2, the top of valve shell 2 is fixedly installed with packing barrel 3, the top of packing barrel 3 is provided with pneumatic device body 4, the top of pneumatic device body 4 is provided with limit switch return transmitter body 5;It also includes: the inside of valve shell 2 is penetrated by sealing gasket 8, the inside of sealing gasket 8 is fixedly connected with anticorrosive layer 9, the inner wall of both sides of anticorrosive layer 9 is fixedly installed with limiting block 10;The bottom of front valve shaft 11 is fixedly installed with valve plate 14, the outer wall of valve plate 14 is fixedly connected with second sealing ring 17, the inside of both sides of second sealing ring 17 and valve plate 14 is provided with groove 18, the front and rear of valve plate 14 is fixedly installed with cover plate 19. Valve plate 14 and second sealing ring 17 are tightly attached, second sealing ring 17 and valve plate 14 are integrally arranged with groove 18, and groove 18 is movably connected with limiting block 10. Second sealing ring 17 and sealing gasket 8 are matched, and second sealing ring 17 and sealing gasket 8 are both made of silica gel.

[0034] When the valve plate 14 is in a closed state in the valve shell 2, the medium impacts on the valve plate 14, at this time, the cover plate 19 connected with the valve plate 14 will first contact the medium, the cover plate 19 is provided as a convex circular ring structure, and is made of a corrosion-resistant material, which effectively disperses the impact force of the medium, reduces the formation of turbulence and vortex, helps to reduce the corrosion risk, and reduces the direct impact on the valve plate 14, thereby improving the stability and durability of the butterfly valve, and the second sealing ring 17 connected with the valve plate 14 is tightly attached to the sealing gasket 8 installed in the valve shell 2, so that the second sealing ring 17 made of silica gel and the sealing gasket 8 form a reliable sealing interface, thereby ensuring good sealing performance of the butterfly valve in the closed state, preventing medium leakage, and the corrosion-resistant layer 9 connected in the sealing gasket 8 can resist the corrosion of the medium, which can further enhance the corrosion resistance and prolong the service life of the butterfly valve.

[0035] Example two: the sealing performance of the butterfly valve can be further improved, please refer to the attached Figure 1 -attached Figure 2 and attached Figure 6 The front and rear sides of the valve shell 2 are fixedly connected with valve seats 6, and the front surface of the valve seat 6 is fixedly installed with a first sealing ring 7. The valve seat 6 is tightly attached with the first sealing ring 7, and the first sealing ring 7 is made of rubber. The inside of the stuffing box 3 penetrates a front valve shaft 11, and the bottom of the valve plate 14 is fixedly installed with a rear valve shaft 15, and the tail end penetrates the valve shell 2. The outer wall of the front valve shaft 11 is sleeved with a shaft sleeve 12, and the outer wall of the front valve shaft 11 is sleeved with a first leakage prevention ring 13 at the top of the shaft sleeve 12. The bottom of the rear valve shaft 15 is sleeved with a second leakage prevention ring 16. The first leakage prevention ring 13 and the second leakage prevention ring 16 are both made of polytetrafluoroethylene, and the first leakage prevention ring 13 and the second leakage prevention ring 16 are made of high molecular material.

[0036] The first leakage prevention ring 13 and the second leakage prevention ring 16 are made of polytetrafluoroethylene, which are respectively sleeved on the front valve shaft 11 and the rear valve shaft 15 connected with the valve plate 14, have a self-sealing effect, can be tightly attached between the shaft and the stuffing box 3 or the valve shell 2, form an effective sealing barrier, thereby preventing leakage at the upper and lower shaft ends, and the valve seat 6 connected with the valve shell 2 is installed with the first sealing ring 7 made of rubber, which has good elasticity and sealing performance, can be tightly attached between the valve seat 6 and the external pipeline, prevents medium leakage, and further improves the sealing performance of the butterfly valve.

[0037] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0038] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electrochemical corrosion-resistant butterfly valve, comprising a butterfly valve body (1), wherein the butterfly valve body (1) comprises a valve shell (2), wherein a packing cylinder (3) is fixedly installed on the top of the valve shell (2), wherein a pneumatic device body (4) is provided on the top of the packing cylinder (3), and a limit switch feedback device body (5) is provided on the top of the pneumatic device body (4). Its features are, Also includes: A sealing gasket (8) runs through the inside of the valve housing (2), and an anti-corrosion layer (9) is fixedly connected inside the sealing gasket (8). Limiting blocks (10) are fixedly installed on the inner walls on both sides of the anti-corrosion layer (9). The front valve shaft (11) runs through the inside of the packing cylinder (3). A valve plate (14) is fixedly installed at the bottom of the front valve shaft (11). A rear valve shaft (15) is fixedly installed at the bottom of the valve plate (14) and its end runs through the valve housing (2). A second sealing ring (17) is fixedly connected to the outer wall of the valve plate (14). Grooves (18) are opened inside the second sealing ring (17) and both sides of the valve plate (14). A cover plate (19) is fixedly installed on the front and back of the valve plate (14).

2. The electrochemical corrosion-resistant butterfly valve according to claim 1, characterized in that: Valve seats (6) are fixedly connected to the front and rear sides of the valve body (2), and a first sealing ring (7) is fixedly installed on the front side of the valve seat (6).

3. The electrochemical corrosion-resistant butterfly valve according to claim 1, characterized in that: The outer wall of the front valve shaft (11) is fitted with a bushing (12), and the outer wall of the front valve shaft (11) is fitted with a first anti-leakage ring (13) at the top of the bushing (12), and the bottom of the rear valve shaft (15) is fitted with a second anti-leakage ring (16).

4. The electrochemical corrosion-resistant butterfly valve according to claim 2, characterized in that: The valve seat (6) and the first sealing ring (7) are tightly fitted together, and the first sealing ring (7) is made of rubber.

5. The electrochemical corrosion-resistant butterfly valve according to claim 3, characterized in that: Both the first leak-proof ring (13) and the second leak-proof ring (16) are made of polytetrafluoroethylene, and the first leak-proof ring (13) and the second leak-proof ring (16) are made of polymer materials.

6. The electrochemical corrosion-resistant butterfly valve according to claim 1, characterized in that: The valve plate (14) and the second sealing ring (17) are tightly fitted together. The second sealing ring (17) and the valve plate (14) are integrated with the groove (18). The groove (18) and the limiting block (10) are movably connected.

7. The electrochemical corrosion-resistant butterfly valve according to claim 1, characterized in that: The second sealing ring (17) and the sealing gasket (8) are matched, and both the second sealing ring (17) and the sealing gasket (8) are made of silicone.

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