Seawater-resistant rubber-lined butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a seawater-resistant rubber-lined butterfly valve, which solves the problems in the background art, and comprises a valve shaft, a valve body, a butterfly plate, a bearing sleeve, a self-lubricating composite bearing, a butterfly plate sealing ring, an adjusting screw, an adjusting pressing plate and the like, the valve shaft is installed in the self-lubricating composite bearing, the self-lubricating composite bearing is installed in the bearing sleeve, the bearing sleeve is installed in the through hole, the butterfly plate sealing ring is fixed to the butterfly plate through the adjusting screw and the adjusting pressing plate, a protection layer is arranged on the inner cavity wall of the valve body, and protection layers are also arranged on flange connecting face bosses on the two sides of the valve body. According to the butterfly valve, the protection layers made of chloroprene rubber are arranged on the inner wall of the valve body, the bosses on the flange connecting faces on the two sides of the valve body, the through hole and the bearing sleeve through the rubber lining technology, and the seawater corrosion resistance of the butterfly valve is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of butterfly valves, in particular to a seawater resistant rubber lined butterfly valve. Background Art

[0002] As a mature valve, butterfly valve is widely used in various industrial or civil pipelines to connect or cut off the medium. The pipeline medium includes various fluids such as gas, liquid and other fluids.

[0003] Typical structure of common seawater resistant rubber lined butterfly valve Figure 3 ,Since ordinary seawater-resistant rubber-lined butterfly valves are not equipped with bearing sleeves, seawater media can penetrate into the gap between the valve shaft and the valve body, causing seawater corrosion, and the degree of corrosion gradually deepens over time. At the same time, since the inner hole of the butterfly plate adopts a through hole, seawater media can penetrate into the gap between the valve shaft and the inner hole of the butterfly plate, causing seawater corrosion, and the degree of corrosion gradually deepens over time. All of the above affect the service life of the butterfly valve. The seawater-resistant butterfly valve with publication number CN219932981U includes a valve body, a self-lubricating bearing, a valve shaft and a butterfly plate; it also includes a bearing sleeve, the bearing sleeve includes a sleeve and an end plate, and a sealant groove is opened on the outer side of one end of the sleeve; the end plate is integrally arranged at the end of the sleeve away from the sealant groove, and abuts against the outer side of the valve body; the butterfly plate It is fixedly arranged at the end of the valve shaft and is used for selectively blocking the valve body. The utility model provides a sealing groove and a sealing glue groove at one end of the sleeve close to the butterfly plate, and arranges an end plate at the other end thereof. The sealing between the sleeve and the valve body and the support of the valve body by the end plate are achieved by a sealing gasket and a seawater-resistant sealant. The connecting gap between the sleeve and the valve body can be wrapped and covered, and the seawater medium in the butterfly valve and the air outside the butterfly valve can be effectively prevented from infiltrating into the connecting gap between the two, thereby improving the seawater corrosion resistance of the butterfly valve. The seawater corrosion resistance is achieved by seawater-resistant materials and coatings, and the utility model mainly uses seawater-resistant materials and rubber lining technology to provide a more durable and stable protection effect, which is more effective in harsh marine environments. For this reason, we propose a seawater-resistant rubber-lined butterfly valve. Utility Model Content

[0004] In order to solve the problem that the current butterfly valve uses corrosion-resistant coatings, and the corrosion effect gradually weakens over time, which will affect the service life of the butterfly valve, the utility model provides the following technical solutions: a seawater-resistant rubber-lined butterfly valve, including a valve shaft, a valve body, a butterfly plate, a bearing sleeve, a self-lubricating composite bearing, a butterfly plate sealing ring, an adjusting screw, and an adjusting pressure plate, etc., wherein the butterfly plate is installed in the valve body, a through hole is opened on the valve body, the valve shaft is installed in the self-lubricating composite bearing, the self-lubricating composite bearing is installed in the bearing sleeve, the bearing sleeve is installed in the through hole, the butterfly plate sealing ring is fixed to the butterfly plate by an adjusting screw and an adjusting pressure plate, the inner cavity wall of the valve body is provided with a protective layer, and the flange connection surface bosses on both sides of the valve body are also provided with a protective layer, a protective layer is provided between the through hole and the bearing sleeve, and multiple O-rings are also provided between the bearing sleeve and the through hole, a Yx sealing ring is provided on the inner side of the valve shaft, and a shaft seal packing is provided on the outer side of the valve shaft.

[0005] Preferably, the valve body is full-bore, and the valve body and butterfly plate are both made of WCB-CrNi material. The WCB-CrNi material complies with GB / T12229 standard material WCB, which stipulates that the percentage of Cr and Ni is 0.35-0.5%, and can delay corrosion of seawater medium.

[0006] Preferably, the bearing sleeve is made of seawater-resistant copper alloy.

[0007] Preferably, the thickness of the protective layer is 3 to 5 mm.

[0008] Preferably, the thickness of the protective layer is 4 mm.

[0009] Preferably, the protective layer is made of chloroprene rubber and is arranged at a corresponding position using a rubber lining process, which can prevent seawater corrosion.

[0010] Preferably, the butterfly plate sealing ring is made of seawater corrosion resistant material, and the material is EPDM rubber or chloroprene rubber.

[0011] Preferably, a screw hole for connecting an adjusting screw is provided on the adjusting pressure plate, and the screw hole is coated with polyurethane ship seawater-resistant sealant to prevent seawater from penetrating into the screw hole and corroding the butterfly plate.

[0012] Preferably, the butterfly plate and the valve shaft are provided with pin holes, and the pins are inserted into the pin holes and fixed by welding. The pin holes are finely processed with a reamer, and the tail of the pin is lined with rubber for a second time to prevent seawater from seeping in.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The valve shaft passes through the self-lubricating composite bearing, and the self-lubricating composite bearing is installed in the through hole of the valve body through the bearing sleeve. Since a multi-channel sealing ring is arranged between the bearing sleeve and the valve body, multiple protections prevent seawater from penetrating into the valve body. A Yx sealing ring is arranged on the inside of the valve shaft to prevent mud and sand from entering the self-lubricating composite bearing; a shaft seal packing is arranged on the outside of the valve shaft to prevent seawater medium from leaking out, and then through the rubber lining process, a protective layer of chloroprene rubber material is arranged on the inner wall of the valve body, the flange connection surface bosses on both sides of the valve body, and between the hole and the bearing sleeve, thereby improving the seawater corrosion resistance of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A cross-sectional view of the utility model as a whole;

[0017] Figure 2 It is an enlarged cross-sectional view of part of the utility model;

[0018] Figure 3 It is a typical structure of ordinary seawater resistant rubber lined butterfly valve;

[0019] In the figure: 1. valve shaft; 2. shaft seal packing; 3. valve body; 4. butterfly plate; 5. bearing sleeve; 6. self-lubricating composite bearing; 7. Yx sealing ring; 8. butterfly plate sealing ring; 9. adjusting screw; 10. adjusting pressure plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with 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 of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Depend on Figure 1-3It is given that the utility model includes a valve shaft 1, a valve body 3, a butterfly plate 4, a bearing sleeve 5, a self-lubricating composite bearing 6, a butterfly plate sealing ring 8, an adjusting screw 9, and an adjusting pressure plate 10, etc., wherein the butterfly plate 4 is installed in the valve body 3, a through hole is opened on the valve body 3, the valve shaft 1 is installed in the self-lubricating composite bearing 6, the self-lubricating composite bearing 6 is installed in the bearing sleeve 5, the bearing sleeve 5 is installed in the through hole, the butterfly plate sealing ring 8 is fixed to the butterfly plate 4 by means of an adjusting screw 9 and an adjusting pressure plate 10, the inner cavity wall of the valve body 3 is provided with a protective layer, and the flange connection surface bosses on both sides of the valve body 3 are also provided with a protective layer, a protective layer is provided between the through hole and the bearing sleeve 5, and a plurality of O-rings are also provided between the bearing sleeve 5 and the through hole, a Yx sealing ring 7 is provided on the inner side of the valve shaft 1, and a shaft seal packing 2 is provided on the outer side of the valve shaft 1.

[0022] The valve body 3 is full-bore. The valve body 3 and the butterfly plate 4 are made of WCB-CrNi material. The WCB-CrNi material complies with the GB / T12229 standard material. The percentage of Cr and Ni components in WCB is specified to be 0.35-0.5%, which can delay the corrosion of seawater medium.

[0023] The bearing sleeve 5 is made of seawater-resistant copper alloy.

[0024] The thickness of the protective layer is 3 to 5 mm.

[0025] The thickness of the protective layer is 4mm.

[0026] The protective layer is made of chloroprene rubber and is set at the corresponding position using rubber lining technology to prevent seawater corrosion.

[0027] The butterfly plate sealing ring 8 is made of seawater corrosion resistant material, and the material is EPDM rubber or chloroprene rubber.

[0028] The adjusting pressure plate 10 is provided with a screw hole for connecting the adjusting screw 9 , and the screw hole is coated with polyurethane ship seawater-resistant sealant to prevent seawater from penetrating into the screw hole and corroding the butterfly plate 4 .

[0029] The butterfly plate 4 and the valve shaft 1 are provided with pin holes, and the pins are inserted into the pin holes and fixed by welding. The pin holes are finely processed with a reamer, and the tail of the pin is lined with rubber for a second time to prevent seawater from seeping in.

[0030] Working principle: the valve shaft 1 passes through the self-lubricating composite bearing 6, and the self-lubricating composite bearing 6 is then installed in the through hole of the valve body 3 through the bearing sleeve 5. Since multiple O-rings are arranged between the bearing sleeve 5 and the valve body 3, multiple protections prevent seawater from penetrating into the valve body 3. A Yx sealing ring 7 is arranged on the inside of the valve shaft 1 to prevent mud and sand from entering the self-lubricating composite bearing 6; a shaft seal packing 2 is arranged on the outside of the valve shaft 1 to prevent seawater medium from leaking out, and then through the rubber lining process, a protective layer of chloroprene rubber material is arranged on the inner cavity wall of the valve body 3, the flange connection surface bosses on both sides of the valve body 3, and between the hole and the bearing sleeve 5, thereby improving the seawater corrosion resistance of the butterfly valve.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seawater-resistant rubber-lined butterfly valve, comprising a valve shaft (1), a valve body (3), a butterfly plate (4), a bearing sleeve (5), a self-lubricating composite bearing (6), a butterfly plate sealing ring (8), an adjusting screw (9), and an adjusting pressure plate (10), etc., wherein: The butterfly plate (4) is installed in a valve body (3), a through hole is provided on the valve body (3), the valve shaft (1) is installed in a self-lubricating composite bearing (6), the self-lubricating composite bearing (6) is installed in a bearing sleeve (5), the bearing sleeve (5) is installed in the through hole, the butterfly plate sealing ring (8) is fixed to the butterfly plate (4) by means of an adjusting screw (9) and an adjusting pressure plate (10), and is characterized in that: a protective layer is provided on the inner cavity wall of the valve body (3), and a protective layer is also provided on the flange connection surface bosses on both sides of the valve body (3), a protective layer is provided between the through hole and the bearing sleeve (5), and a plurality of O-rings are provided between the bearing sleeve (5) and the through hole, a Yx sealing ring (7) is provided on the inner side of the valve shaft (1), and a shaft seal packing (2) is provided on the outer side of the valve shaft (1).

2. The seawater resistant rubber lined butterfly valve according to claim 1 is characterized by: The valve body (3) is of full bore, and the valve body (3) and the butterfly plate (4) are both made of WCB-CrNi material. The WCB-CrNi material complies with GB / T12229 standard material WCB, which stipulates that the percentage content of Cr and Ni is 0.35-0.5%.

3. The seawater resistant rubber lined butterfly valve according to claim 2 is characterized by: The bearing sleeve (5) is made of seawater-resistant copper alloy.

4. The seawater resistant rubber lined butterfly valve according to claim 3 is characterized by: The thickness of the protective layer is 3 to 5 mm.

5. The seawater resistant rubber lined butterfly valve according to claim 4 is characterized by: The thickness of the protective layer is 4 mm.

6. The seawater resistant rubber lined butterfly valve according to claim 5 is characterized by: The protective layer is made of chloroprene rubber and is arranged at the corresponding position by using a rubber lining process.

7. The seawater resistant rubber lined butterfly valve according to claim 6 is characterized by: The butterfly plate sealing ring (8) is made of seawater corrosion resistant material, which is EPDM rubber or chloroprene rubber.

8. The seawater resistant rubber lined butterfly valve according to claim 7 is characterized by: The adjusting pressure plate (10) is provided with a screw hole for connecting the adjusting screw (9), and the screw hole is coated with polyurethane ship seawater resistant sealant.

9. The seawater resistant rubber lined butterfly valve according to claim 8, characterized in that: The butterfly plate (4) and the valve shaft (1) are provided with pin holes, and the pins are inserted into the pin holes and fixed by welding. The pin holes are finely processed with a reamer, and the tail of the pin is treated with a secondary rubber lining to prevent seawater from seeping in.

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