Butterfly valve with protection function

Abstract

The utility model provides a butterfly valve with a protection function, which relates to the technical field of butterfly valve related equipment and comprises a valve body, a valve rod, a valve bonnet and a pressing plate component. The valve bonnet is connected with the valve body; the pressing plate assembly comprises a filler pressing plate and an outer protection piece connected with the filler pressing plate, and the filler pressing plate is connected with the valve bonnet. The outer protection piece is arranged in the circumferential direction of the valve rod and used for preventing sand and dust from entering a gap between the valve rod and the valve body. The butterfly valve solves the technical problems that in the prior art, when a butterfly valve is used in a special environment, a valve rod of the butterfly valve is eroded due to sand and dust, and then the valve rod is abraded, clamped or invalid.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve related equipment, in particular to a butterfly valve with a protective function. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on-off control of low-pressure pipeline media. A butterfly valve refers to a type of valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. Therefore, butterfly valves, as an important fluid control device, are widely used in various industrial fields.

[0003] Moreover, in some specific environments, such as deserts, mines and other dusty areas, the stem of the butterfly valve is easily eroded by the dust, causing the stem to wear, get stuck or even fail, seriously affecting the normal use of the valve.

[0004] However, the existing butterfly valve stem only has packing inside to prevent the medium in the valve body flow channel from leaking out; and when the valve is used in a harsh environment, it is unavoidable that external factors cause dust to enter the valve stem and packing, thereby seriously affecting the service life of the valve. Utility Model Content

[0005] The utility model aims to provide a butterfly valve with a protective function to alleviate the technical problem in the prior art that when a butterfly valve is used in a special environment, the valve stem of the butterfly valve is corroded by sand and dust, thereby causing the valve stem to wear, get stuck or fail.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a butterfly valve with a protective function, comprising a valve body, a valve stem, a valve cap and a pressure plate assembly, wherein the valve stem is connected to the valve body;

[0008] The valve cap is connected to the valve body;

[0009] The pressure plate assembly includes a packing pressure plate and an outer protective member connected to the packing pressure plate, and the packing pressure plate is connected to the valve cap;

[0010] The outer protective member is arranged along the circumference of the valve stem to prevent sand and dust from entering the gap between the valve stem and the valve body.

[0011] Furthermore, the pressure plate assembly further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is connected to the packing pressure plate, and the first sealing ring is in close contact with the valve stem;

[0012] The second sealing ring is connected to the packing pressure plate, and the second sealing ring is in tight contact with the valve body.

[0013] Furthermore, the pressure plate assembly further comprises a packing, and the packing is arranged between the valve stem and the valve body;

[0014] The packing pressing plate presses the packing toward the valve body.

[0015] Furthermore, the pressure plate assembly also includes a packing gasket, and the packing gasket is connected to an end of the packing facing away from the packing pressure plate.

[0016] Furthermore, the butterfly valve with a protective function further comprises a lower gland, which is connected to an end of the valve body away from the valve cap via gland bolts;

[0017] A gland gasket is provided between the lower gland and the valve body.

[0018] Further, the valve stem is provided with a first sliding bearing and a second sliding bearing, the first sliding bearing is connected to the inner wall of the valve body, and the first sliding bearing is in contact with the lower gland;

[0019] The second sliding bearing is connected to the valve body and the pressure plate assembly respectively.

[0020] Furthermore, the butterfly valve with a protective function also includes a butterfly plate assembly, the butterfly plate assembly is connected to the valve stem, and the butterfly plate assembly is arranged in the valve body.

[0021] Further, the butterfly plate assembly comprises a butterfly plate body and a pressure plate, and the butterfly plate body is connected to the valve stem;

[0022] The pressing plate is connected to the butterfly plate body.

[0023] Furthermore, the butterfly plate body is provided with a butterfly plate sealing ring, and the butterfly plate sealing ring is in tight contact with the valve body to seal the gap between the butterfly plate body and the valve body.

[0024] Furthermore, the pressure plate is detachably connected to the butterfly plate body via pressure plate bolts.

[0025] The utility model can achieve the following beneficial effects:

[0026] In the first aspect, the utility model provides a butterfly valve with a protective function, including a valve body, a valve stem, a valve bonnet and a pressure plate assembly, wherein the valve stem is connected to the valve body; the valve bonnet is connected to the valve body; the pressure plate assembly includes a packing pressure plate and an outer protective member connected to the packing pressure plate, and the packing pressure plate is connected to the valve bonnet; the outer protective member is arranged along the circumference of the valve stem to prevent sand and dust from entering the gap between the valve stem and the valve body.

[0027] In the utility model, a valve stem is provided in the valve body, and the valve stem is rotatably connected to the valve body, and a valve bonnet is provided at the top of the valve stem, and the valve bonnet is detachably connected to the valve body by bolts, and the end of the valve stem passes through the valve body, and a pressure plate assembly is provided between the valve bonnet and the valve body, and the pressure plate assembly is provided with an external protective member, and the protective member is tightly wrapped around the outer wall of the valve stem along the circumference of the valve stem to prevent dust from entering the gap between the valve stem and the valve body from the gap between the valve stem and the valve bonnet.

[0028] Compared with the prior art, the butterfly valve with protection function provided by the utility model has a pressure plate assembly between the valve bonnet and the valve body, so as to wrap the valve stem through the outer protection member in the pressure plate assembly to prevent dust from entering through the gap between the valve bonnet and the valve stem.

[0029] In summary, the utility model at least alleviates the technical problem in the prior art that when a butterfly valve is used in a special environment, the valve stem of the butterfly valve is corroded due to sand and dust, which causes the valve stem to wear, get stuck or fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic cross-sectional view of the internal structure of a butterfly valve with a protective function provided in an embodiment of the utility model;

[0032] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0033] Figure 3 A schematic structural diagram of a pressure plate assembly portion of a butterfly valve with a protective function provided in an embodiment of the utility model.

[0034] Icon: 1-valve body; 2-valve stem; 21-first sliding bearing; 22-second sliding bearing; 3-valve bonnet; 4-lower pressure cover; 41-pressure cover bolt; 42-pressure cover gasket; 5-butterfly plate assembly; 51-butterfly plate body; 511-butterfly plate sealing ring; 52-pressure plate; 521-pressure plate bolt; 6-pressure plate assembly; 61-packing pressure plate; 62-external protective member; 63-first sealing ring; 64-second sealing ring; 65-packing; 66-packing gasket. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] Embodiment 1

[0043] This embodiment provides a butterfly valve with a protective function. Figure 1 or Figure 3 The butterfly valve with protection function includes a valve body 1, a valve stem 2, a valve bonnet 3 and a pressure plate assembly 6, the valve stem 2 is connected to the valve body 1; the valve bonnet 3 is connected to the valve body 1; the pressure plate assembly 6 includes a packing pressure plate 61 and an outer protective member 62 connected to the packing pressure plate 61, the packing pressure plate 61 is connected to the valve bonnet 3; the outer protective member 62 is arranged along the circumference of the valve stem 2 to prevent sand and dust from entering the gap between the valve stem 2 and the valve body 1.

[0044] The embodiments of the utility model at least alleviate the technical problem in the prior art that when a butterfly valve is used in a special environment, the valve stem of the butterfly valve is corroded by sand and dust, thereby causing the valve stem to wear, get stuck or fail.

[0045] In the embodiment of the utility model, a valve stem 2 is provided in the valve body 1, and the valve stem 2 is rotatably connected to the valve body 1, and a valve bonnet 3 is provided at the top of the valve stem 2, and the valve bonnet 3 is detachably connected to the valve body 1 by bolts, and the end of the valve stem 2 passes through the valve body 1, and a pressure plate assembly 6 is provided between the valve bonnet 3 and the valve body 1, and the pressure plate assembly 6 is provided with an outer protective member 62. In addition, the protective member 62 is tightly wrapped around the outer wall of the valve stem 2 along the circumference of the valve stem 2 to prevent dust from entering the gap between the valve stem 2 and the valve body 1 from the gap between the valve stem 2 and the valve bonnet 3.

[0046] It should be noted that the outer protective member 62 is made of corrosion-resistant material so that it can effectively prevent the penetration of corrosive media or dust, etc., and has good sealing performance, thereby protecting the valve stem 2 from corrosion and wear.

[0047] Compared with the prior art, the butterfly valve with a protective function provided in the embodiment of the utility model has a pressure plate assembly 6 between the valve bonnet 3 and the valve body 1, so as to wrap the valve stem 2 through the outer protective member 62 in the pressure plate assembly 6 to prevent dust from entering through the gap between the valve bonnet 3 and the valve stem 2.

[0048] In an optional implementation manner of this embodiment, refer to Figure 3 The pressure plate assembly 6 also includes a first sealing ring 63 and a second sealing ring 64. The first sealing ring 63 is connected to the packing pressure plate 61, and the first sealing ring 63 is tightly abutted against the valve stem 2; the second sealing ring 64 is connected to the packing pressure plate 61, and the second sealing ring 64 is tightly abutted against the valve body 1.

[0049] Specifically: the first sealing ring 63 is connected to the inner wall of the packing plate 61 along the circumference thereof, and abuts against the outer wall of the valve stem 2 passing through the packing plate 61 to achieve sealing; similarly, the second sealing ring 64 is connected to the outer wall of the packing plate 61 along the circumference thereof, and seals the gap between the packing plate 61 and the valve body 1; and preferably, the first sealing ring 63 and the second sealing ring 64 are both made of rubber material.

[0050] In an optional implementation manner of this embodiment, refer to Figure 3 The pressure plate assembly 6 also includes a packing 65 , which is arranged between the valve stem 2 and the valve body 1 ; the packing pressure plate 61 presses the packing 65 toward the valve body 1 .

[0051] Specifically, a packing 65 is provided between the bottom of the packing pressing plate 61 and the valve body 1 . The packing 65 is connected to the outer wall of the valve stem 2 along the circumference of the valve stem 2 , and is pressed against the valve body 1 by the packing pressing plate 61 .

[0052] Further, refer to Figure 3 The pressure plate assembly 6 further includes a packing gasket 66 , which is connected to one end of the packing 65 facing away from the packing pressure plate 61 .

[0053] Specifically, the packing gasket 66 is connected to one end of the packing 65 which is away from the packing pressure plate 61 , so as to separate the packing 65 from the valve body 1 .

[0054] In an optional implementation manner of this embodiment, refer to Figure 1 or Figure 2 The butterfly valve with protection function also includes a lower gland 4, which is connected to the end of the valve body 1 away from the valve cap 3 through a gland bolt 41; and a gland gasket 42 is provided between the lower gland 4 and the valve body 1.

[0055] Specifically: the lower gland 4 is connected to the end of the valve body 1 away from the valve cap 3 through a gland bolt 41, and preferably, there can be multiple gland bolts 41, and the multiple gland bolts 41 are distributed at intervals along the circumference of the lower gland 4, so as to realize the detachable connection between the lower gland 4 and the valve body 1 through the gland bolts 41; and accordingly, a gland gasket 42 is arranged between the lower gland 4 and the valve body 1, and the gland gasket 42 is used to seal the lower gland 4 to prevent the medium from leaking from the gap between the lower gland 4 and the valve body 1.

[0056] Further, refer to Figure 1 or Figure 2 The valve stem 2 is provided with a first sliding bearing 21 and a second sliding bearing 22. The first sliding bearing 21 is connected to the inner wall of the valve body 1, and the first sliding bearing 21 abuts against the lower pressure cover 4; the second sliding bearing 22 is respectively connected to the valve body 1 and the pressure plate assembly 6.

[0057] Specifically: a first sliding bearing 21 is provided at the bottom of the valve stem 2, and the first sliding bearing 21 is connected to the inner wall of the valve body 1, so as to avoid friction damage between the valve stem 2 and the valve body 1 when the valve stem 2 rotates; and a second sliding bearing 22 is provided at the middle and upper part of the valve stem 2, and the second sliding bearing 22 is connected to the valve body 1 and the pressure plate assembly 6, so as to avoid friction between the valve stem 2 and the valve body 1 and the pressure plate assembly 6 when the valve stem 2 rotates.

[0058] In an optional implementation manner of this embodiment, refer to Figure 2 The butterfly valve with protection function also includes a butterfly plate assembly 5, which is connected to the valve stem 2 and is arranged in the valve body 1.

[0059] Specifically: the butterfly plate assembly 5 is connected to the valve stem 2, and preferably, a transmission key is provided on the valve stem 2, and the valve stem 2 is connected to the butterfly plate assembly 5 through the corresponding transmission key, so that the valve stem 2 drives the butterfly plate assembly 5 to rotate.

[0060] Further, refer to Figure 2 The butterfly plate assembly 5 includes a butterfly plate body 51 and a pressure plate 52 . The butterfly plate body 51 is connected to the valve stem 2 ; the pressure plate 52 is connected to the butterfly plate body 51 .

[0061] Specifically: the butterfly plate body 51 is connected to the valve stem 2, and preferably, the butterfly plate body 51 is connected to the valve stem 2 through a transmission key so that the valve stem 2 drives the butterfly plate body 51 to move, and a pressure plate 52 is provided on the butterfly plate body 51, and the pressure plate 52 is detachably connected to the butterfly plate body 51.

[0062] Further, refer to Figure 2 The butterfly plate body 51 is provided with a butterfly plate sealing ring 511 , and the butterfly plate sealing ring 511 is in close contact with the valve body 1 to seal the gap between the butterfly plate body 51 and the valve body 1 .

[0063] Specifically: the butterfly plate sealing ring 511 is connected to the butterfly plate body 51 along the circumference thereof, and when the butterfly plate body 51 rotates to the first position, the butterfly plate sealing ring 511 is in close contact with the valve body 1 to seal the valve, and when it rotates to the second position, the butterfly plate sealing ring 511 is separated from the valve body 1 to open the valve.

[0064] In an optional implementation manner of this embodiment, refer to Figure 2 The pressure plate 52 is detachably connected to the butterfly plate body 51 through the pressure plate bolts 521.

[0065] Specifically: the pressure plate 52 is detachably connected to the butterfly plate body 51 through the pressure plate bolts 521, and preferably, the panel size of the pressure plate 52 is the same as the area of ​​the butterfly plate body 51, and the pressure plate bolts 521 can be multiple, and the multiple pressure plate bolts 521 are distributed along the circumference of the pressure plate 52.

[0066] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the various embodiments of the utility model.

Claims

1. A butterfly valve with a protective function, characterized in that: It comprises a valve body (1), a valve stem (2), a valve cap (3) and a pressure plate assembly (6), wherein the valve stem (2) is connected to the valve body (1); The valve cap (3) is connected to the valve body (1); The pressure plate assembly (6) comprises a packing pressure plate (61) and an outer protective member (62) connected to the packing pressure plate (61), and the packing pressure plate (61) is connected to the valve cap (3); The outer protective member (62) is arranged along the circumference of the valve stem (2) to prevent sand and dust from entering the gap between the valve stem (2) and the valve body (1).

2. The butterfly valve with protection function according to claim 1, characterized in that: The pressure plate assembly (6) further comprises a first sealing ring (63) and a second sealing ring (64), wherein the first sealing ring (63) is connected to the packing pressure plate (61), and the first sealing ring (63) is in tight contact with the valve stem (2); The second sealing ring (64) is connected to the packing pressure plate (61), and the second sealing ring (64) is in tight contact with the valve body (1).

3. The butterfly valve with protection function according to claim 1, characterized in that: The pressure plate assembly (6) further comprises a packing (65), wherein the packing (65) is arranged between the valve stem (2) and the valve body (1); The packing pressure plate (61) presses the packing (65) toward the valve body (1).

4. The butterfly valve with protection function according to claim 3 is characterized in that: The pressure plate assembly (6) further comprises a packing gasket (66), wherein the packing gasket (66) is connected to an end of the packing (65) facing away from the packing pressure plate (61).

5. The butterfly valve with protection function according to claim 1, characterized in that: It also includes a lower gland (4), wherein the lower gland (4) is connected to an end of the valve body (1) away from the valve cap (3) via a gland bolt (41); A gland gasket (42) is provided between the lower gland (4) and the valve body (1).

6. The butterfly valve with protection function according to claim 5, characterized in that: The valve stem (2) is provided with a first sliding bearing (21) and a second sliding bearing (22), the first sliding bearing (21) is connected to the inner wall of the valve body (1), and the first sliding bearing (21) is in contact with the lower gland (4); The second sliding bearing (22) is respectively connected to the valve body (1) and the pressure plate assembly (6).

7. The butterfly valve with protection function according to claim 1, characterized in that: It also comprises a butterfly plate assembly (5), wherein the butterfly plate assembly (5) is connected to the valve stem (2), and the butterfly plate assembly (5) is arranged in the valve body (1).

8. The butterfly valve with protection function according to claim 7, characterized in that: The butterfly plate assembly (5) comprises a butterfly plate body (51) and a pressure plate (52), and the butterfly plate body (51) is connected to the valve stem (2); The pressing plate (52) is connected to the butterfly plate body (51).

9. The butterfly valve with protection function according to claim 8, characterized in that: The butterfly plate body (51) is provided with a butterfly plate sealing ring (511), and the butterfly plate sealing ring (511) is in tight contact with the valve body (1) to seal the gap between the butterfly plate body (51) and the valve body (1).

10. The butterfly valve with protection function according to claim 8, characterized in that: The pressure plate (52) is detachably connected to the butterfly plate body (51) via pressure plate bolts (521).

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