A valve cover and diaphragm gate valve

Abstract

The utility model discloses a valve cover and diaphragm gate valve, the valve cover includes valve cover main part and a plurality of reinforcing rib, the inside of valve cover main part forms the cavity of downward opening, the valve cover main part includes reinforcing boss part and top cap part, the reinforcing boss part is provided with the through hole along the up and down direction in, the reinforcing boss part sets up in the middle part of top cap part, the reinforcing boss part protrudes in top cap part and its stretches into the cavity, and a plurality of reinforcing rib is arranged between reinforcing boss part and top cap part along the circumference direction interval. The utility model can jointly guarantee that the structure of the middle hole of valve cover is not easy to deform or damage nearby, and can provide the installation position for the valve opening indicator.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a valve cover and a diaphragm gate valve. Background Technology

[0002] A diaphragm gate valve is a type of shut-off valve that uses a diaphragm as an opening and closing element to close the flow channel, cut off the fluid, and separate the valve body cavity from the valve cover cavity. Its working principle is that rotating the handwheel drives the valve stem to rotate, thereby causing the valve core, which is threaded to the valve stem, to move up and down, controlling the connection between the inlet and outlet of the valve body. In existing diaphragm gate valves, the force on the valve cover is concentrated near the central hole in the middle of the valve cover where the valve stem passes through, which can easily lead to local deformation or even damage near the central hole of the valve cover.

[0003] CN212564505U discloses a valve stem mounting structure and a diaphragm valve having the valve stem. The valve stem mounting structure includes a valve stem and a buffer body, with the buffer body located between the valve stem and the valve core, and the valve stem and valve core being separate. The diaphragm valve includes a valve stem, a valve core, and a buffer body, and further includes a valve body, a valve cover, a diaphragm, and a rubber liner. The valve stem passes through the valve cover and is threadedly connected to the buffer body. The rubber liner is adhered to the inner wall of the valve body and placed between the valve body and the valve cover. The diaphragm is adhered to the outer surface of the valve core and the pressure cup and placed between the valve body and the valve cover, forming a media passage between the diaphragm and the rubber liner. Multiple reinforcing ribs are spaced apart near the outer edge of the valve cover. Undoubtedly, the technical solution disclosed in the above patent document is a beneficial attempt in the relevant technical field. However, the reinforcing ribs are mainly positioned near the outer edge of the valve cover, resulting in poor reinforcement near the central hole of the valve cover. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a valve cover and a diaphragm gate valve that can jointly ensure that the structure near the central hole of the valve cover is not easily deformed or damaged, and can provide an installation position for the valve opening indicator.

[0005] In a first aspect, this utility model provides a valve cover, including a valve cover body and a plurality of reinforcing ribs. The valve cover body has a downward-opening cavity. The valve cover body includes a reinforcing boss and a top cover. The reinforcing boss has a central hole extending vertically through it. The reinforcing boss is located in the middle of the top cover and protrudes downward from the top cover and extends into the cavity. The plurality of reinforcing ribs are circumferentially spaced between the reinforcing boss and the top cover along the central hole. The valve cover body and the plurality of reinforcing ribs can be integrally formed, and the number of reinforcing ribs can be five or more. This design provides a support surface for the valve handwheel on the upper surface of the reinforced boss and a support surface for the thrust bearing on the lower surface. The reinforced boss protrudes downwards from the top cover and extends into the cavity, increasing the thickness and strength near the central hole. Furthermore, connecting the reinforced boss and the top cover with multiple reinforcing ribs further increases the strength near the central hole. The spacing of these ribs along the circumference of the central hole reduces material usage, facilitating lightweight design. Therefore, this invention, through the combined effect of the reinforced boss and multiple reinforcing ribs, ensures that the structure near the central hole is not easily deformed or damaged.

[0006] In some possible implementations, the top cover is a conical structure that gradually extends radially outward and downward along the central hole. The length direction of each of the reinforcing ribs is radially along the central hole, and the radially inner sides of each reinforcing rib are conformally connected to the radially outer side of the reinforcing boss. The upper sides of each reinforcing rib are conformally connected to the lower surface of the top cover. This configuration reduces localized stress, distributing the weight and force of the top cover along its extension direction, thus reducing the risk of deformation or damage. Furthermore, since the conical structure extends radially outward and downward along the central hole, while the reinforcing boss protrudes axially downward along the central hole, the thickness of each reinforcing rib in the vertical direction gradually decreases radially outward from the central hole. The shape of each reinforcing rib is approximately triangular, resulting in high stability and a good strength-enhancing effect.

[0007] In some possible implementations, the top cover is provided with an indicator through hole, and the two reinforcing ribs are provided with indicator mounting holes. With this configuration, the indicator mounting holes can be threaded holes with their axes running vertically, opening downwards and extending upwards. They can extend upwards only into the reinforcing ribs or upwards into the top cover. The valve opening indicator can be connected to the indicator mounting holes via threaded fasteners. The reinforcing ribs provide a mounting position for the valve opening indicator and increase the thickness of the top cover in the vertical direction, ensuring that the depth of the indicator mounting holes meets the installation requirements of the threaded fasteners, i.e., ensuring the thread fit length between the threaded fasteners and the indicator mounting holes, thereby ensuring the installation stability of the valve opening indicator.

[0008] In some possible implementations, the two reinforcing ribs with the indicator mounting holes are located on different sides of the indicator through hole in the circumferential direction. With this arrangement, the two reinforcing ribs are adjacent to each other, and the mounting lugs of the valve opening indicator contact one of the reinforcing ribs on each side. The mounting lugs and reinforcing ribs are fixed to the indicator mounting holes by threaded fasteners, and the center of the valve opening indicator passes through the indicator through hole.

[0009] In some possible implementations, the lower surfaces of the two reinforcing ribs with the indicator mounting holes are located on the same plane. This arrangement creates a mounting plane on the lower surfaces of the two reinforcing ribs, which contacts the two sides of the mounting lugs of the valve opening indicator.

[0010] In some possible implementations, multiple reinforcing ribs are evenly spaced along the circumference of the central hole. This arrangement ensures that the reinforcing ribs are evenly distributed, resulting in a more uniform distribution of stress.

[0011] In some possible implementations, the reinforcing boss protrudes upwards from the top cover. This configuration further increases the thickness of the reinforcing boss in the vertical direction, thus enhancing its strength. It also provides a support surface for the valve handwheel, allowing for a larger operating space between the handwheel and the top cover, facilitating handwheel rotation. Furthermore, the upper surface of the reinforcing boss provides a support surface for the valve handwheel, while the lower surface provides a support surface for the thrust bearing. The increased size of both the upper and lower support surfaces effectively constrains the posture of the handwheel and valve stem, ensuring stability during rotation and preventing valve stem swaying.

[0012] In some possible implementations, a bushing is also included, which is installed in the central hole with an interference fit. Preferably, the bushing is made of a material with higher wear resistance than the valve cover. With this configuration, the bushing rotates in conjunction with the valve stem, and the valve stem will not cause wear to the central hole of the valve cover body when it rotates, which helps to improve the smoothness of the valve stem rotation.

[0013] In some possible implementations, the valve cover body further includes an annular portion and a flange portion. The upper part of the annular portion is connected to the radially outer side of the top cover portion, and the lower part of the annular portion is connected to the radially inner side of the flange portion. The flange portion protrudes radially outward from the lower part of the annular portion along the central hole, and a plurality of bolt through holes are spaced circumferentially along the central hole on the flange portion. With this configuration, the annular portion can be used to form a cavity, and the flange portion is used to connect to the valve body.

[0014] Secondly, this utility model provides a diaphragm gate valve, including the valve cover described above.

[0015] The beneficial effects of this utility model are: (1) The upper surface of the reinforcing boss of this utility model is used to provide a support surface for the valve handwheel, and the lower surface of the reinforcing boss is used to provide a support surface for the thrust bearing. The reinforcing boss protrudes downward from the top cover and extends into the cavity, which can increase the thickness near the central hole and improve the strength near the central hole. Furthermore, by connecting the reinforcing boss and the top cover with multiple reinforcing ribs, the strength near the central hole can be further increased. The arrangement of multiple reinforcing ribs at intervals along the circumference of the central hole can reduce the amount of material used, which is conducive to achieving lightweight design. Therefore, this utility model can ensure that the structure near the central hole is not easily deformed or damaged by the reinforcing boss and multiple reinforcing ribs.

[0016] (2) This utility model can provide an installation position for the valve opening indicator and can ensure the installation stability of the valve opening indicator. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration: Figure 1 This is one of the structural schematic diagrams of the valve cover of this utility model; Figure 2 This is the second structural schematic diagram of the valve cover of this utility model; Figure 3 This is a cross-sectional schematic diagram of the valve cover of this utility model; Figure 4 This is a schematic diagram of the diaphragm gate valve of this utility model; Figure 5 This is a schematic diagram of the valve opening indicator of this utility model; Figure 6 This is a schematic diagram of the connection between the valve cover and the valve opening indicator of this utility model; Figure 7 This is a schematic diagram of the valve stem structure of this utility model; Figure 8 This is a schematic diagram of the valve core diaphragm and valve core of this utility model; Figure 9 This is a schematic diagram of the metal core skeleton and sleeve of this utility model.

[0018] The following labels are shown in the attached diagram: 1-Valve cover, 101-Valve cover body, 1011-Reinforcing boss, 1012-Top cover, 1013-Annular part, 1014-Flange part, 102-Reinforcing rib, 103-Cavity, 104-Central hole, 105-Indicator through hole, 106-Indicator mounting hole, 107-Shaft sleeve, 108-Bolt through hole; 2-Handwheel locking nut, 3-Handwheel, 4-Valve opening indicator, 401-Mounting lug, 402-Driven gear, 5-Valve stem, 501-Connecting threaded section, 502-Square rod section, 503-Round rod section, 504-Boss section, 505-Drive threaded section, 6-Drive gear, 7-Thrust bearing, 8-Pressure cup locking nut, 9-Butterfly gasket, 10-Flexible pressure cup, 11-Valve core diaphragm, 12-Valve core, 1201-Metal core skeleton, 1202-Core liner, 1203-Sleeve, 13-Valve body, 1301-Control channel, 1302-Inlet channel, 1303-Outlet channel. Detailed Implementation

[0019] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments. In the following text, the axial direction of the central hole 104 refers to the direction along the axis of the central hole 104, the radial direction of the central hole 104 refers to the direction perpendicular to the axial direction of the central hole 104, and the circumferential direction of the central hole 104 refers to the direction around the axis of the central hole 104.

[0020] Example 1: like Figures 1-3 As shown, a valve cover 1 in this embodiment includes a valve cover body 101 and a plurality of reinforcing ribs 102. The valve cover body 101 has a downwardly opening cavity 103. The valve cover body 101 includes a reinforcing boss 1011 and a top cover 1012. The reinforcing boss 1011 has a central hole 104 extending vertically. The reinforcing boss 1011 is located in the middle of the top cover 1012, protruding downwards from the top cover 1012 and extending into the cavity 103. The plurality of reinforcing ribs 102 are circumferentially spaced between the reinforcing boss 1011 and the top cover 1012 along the central hole 104. The valve cover body 101 and the plurality of reinforcing ribs 102 can be an integrally formed structure, and the number of reinforcing ribs 102 can be five or other numbers. This design allows the upper surface of the reinforced boss 1011 to provide a support surface for the valve handwheel 3, and the lower surface of the reinforced boss 1011 to provide a support surface for the thrust bearing 7. The reinforced boss 1011 protrudes downwards from the top cover 1012 and extends into the cavity 103, increasing the thickness near the central hole 104 and enhancing its strength. Furthermore, the connection between the reinforced boss 1011 and the top cover 1012 via multiple reinforcing ribs 102 further increases the strength near the central hole 104. The circumferential spacing of the multiple reinforcing ribs 102 along the central hole 104 reduces material usage, facilitating lightweight design. Therefore, this invention, through the combined reinforcement of the boss 1011 and the multiple reinforcing ribs 102, ensures that the structure near the central hole 104 is not easily deformed or damaged.

[0021] In this embodiment, the top cover 1012 is a conical structure that extends radially outward and downward along the central hole 104. The length direction of each of the plurality of reinforcing ribs 102 is radially along the central hole 104. The radially inner sides of each of the plurality of reinforcing ribs 102 are conformally connected to the radially outer sides of the reinforcing boss 1011, and the upper sides of each of the plurality of reinforcing ribs 102 are conformally connected to the lower surface of the top cover 1012. This configuration reduces localized stress, distributing the weight and force of the top cover 1012 along its extension direction, thus reducing the risk of deformation or damage to the top cover 1012. Furthermore, since the conical structure extends radially outward and downward along the central hole 104, while the reinforcing boss 1011 protrudes axially downward along the central hole 104, the thickness of each reinforcing rib 102 in the vertical direction gradually decreases radially outward along the central hole 104. The shape of each reinforcing rib 102 is approximately triangular, resulting in high stability and a good strength-enhancing effect.

[0022] In this embodiment, the top cover 1012 is provided with an indicator through hole 105, and the two reinforcing ribs 102 are provided with indicator mounting holes 106. With this configuration, the indicator mounting hole 106 can be a threaded hole with its axis running vertically. The opening direction of the indicator mounting hole 106 is downward, and the indicator mounting hole 106 extends from bottom to top, either extending only upward into the reinforcing rib 102 or extending upward into the top cover 1012. The valve opening indicator 4 can be connected to the indicator mounting hole 106 via a threaded fastener. The reinforcing rib 102 provides an installation position for the valve opening indicator 4 and increases the thickness of the top cover 1012 in the vertical direction, ensuring that the depth of the indicator mounting hole 106 meets the installation requirements of the threaded fastener, i.e., ensuring the thread engagement length between the threaded fastener and the indicator mounting hole 106, thereby ensuring the installation stability of the valve opening indicator 4.

[0023] In this embodiment, the two reinforcing ribs 102 with the indicator mounting hole 106 are located on different sides of the indicator through hole 105 in the circumferential direction of the central hole 104. With this arrangement, the two reinforcing ribs 102 are adjacent to each other, and the two sides of the mounting lug 401 of the valve opening indicator 4 are in contact with one of the reinforcing ribs 102. The mounting lug 401 and the reinforcing rib 102 are fixed to the indicator mounting hole 106 by threaded fasteners, and the center of the valve opening indicator 4 passes through the indicator through hole 105.

[0024] In this embodiment, the lower surfaces of the two reinforcing ribs 102 with the indicator mounting holes 106 are located on the same plane. This arrangement creates a mounting plane on the lower surfaces of the two reinforcing ribs 102, which contacts the two sides of the mounting lugs 401 of the valve opening indicator 4.

[0025] In this embodiment, multiple reinforcing ribs 102 are evenly spaced along the circumference of the central hole 104. This arrangement ensures that the reinforcing ribs 102 are evenly distributed, and the stress is distributed more evenly.

[0026] In this embodiment, the reinforcing boss 1011 protrudes upward from the top cover 1012. This configuration further increases the thickness of the reinforcing boss 1011 in the vertical direction, thus enhancing its strength. Simultaneously, it provides a support surface for the valve handwheel 3, allowing for a larger operating space between the valve handwheel 3 and the top cover 1012, facilitating the operator's rotation of the handwheel 3.

[0027] In this embodiment, a bushing 107 is also included, which is installed in the central hole 104 with an interference fit. Preferably, the bushing 107 is made of a material with higher wear resistance than the valve cover 1. With this configuration, the bushing 107 rotates with the valve stem 5, and the valve stem 5 will not cause wear to the central hole 104 of the valve cover body 101 when it rotates, which helps to improve the smoothness of the rotation of the valve stem 5.

[0028] In this embodiment, the valve cover body 101 further includes an annular portion 1013 and a flange portion 1014. The upper part of the annular portion 1013 is connected to the radially outer side of the top cover portion 1012, and the lower part of the annular portion 1013 is connected to the radially inner side of the flange portion 1014. The flange portion 1014 protrudes radially outward from the lower part of the annular portion 1013 along the central hole 104. A plurality of bolt through holes 108 are circumferentially spaced along the central hole 104 on the flange portion 1014. With this configuration, the annular portion 1013 can be used to form a cavity 103, and the flange portion 1014 is used to connect to the valve body 13.

[0029] Example 2: like Figures 4-9 As shown, a diaphragm gate valve in this embodiment includes the valve cover 1 in embodiment one, as well as a handwheel locking nut 2, a handwheel 3, a valve opening indicator 4, a valve stem 5, a drive gear 6, a thrust bearing 7, a pressure cup locking nut 8, a butterfly gasket 9, a flexible pressure cup 10, a valve core diaphragm 11, a valve core 12, and a valve body 13.

[0030] The valve stem 5 includes, from top to bottom, a connecting threaded section 501, a square rod section 502, a round rod section 503, a boss section 504, and a driving threaded section 505. The handwheel 3 has a square hole that conforms to the square rod section 502, and the handwheel 3 is fitted onto the square rod section 502, allowing both to rotate synchronously. The handwheel locking nut 2 is threaded into the connecting threaded section 501 to secure the handwheel 3. The round rod section 503 rotatably engages with the bushing 107 inside the valve cover 1, and the lower part of the round rod section 503 extends out of the reinforcing boss portion 1011. The thrust bearing 7 is sleeved on the lower part of the round rod section 503, and is located between the reinforcing boss portion 1011 and the boss section 504. The drive gear 6 is sleeved on the boss section 504, and the drive gear 6 can rotate synchronously with the boss section 504.

[0031] The mounting lugs 401 of the valve opening indicator 4 are in contact with one of the reinforcing ribs 102 on each side, and the mounting lugs 401 and the reinforcing ribs 102 are fixed by connecting them to the indicator mounting hole 106 with threaded fasteners. The center of the valve opening indicator 4 passes through the indicator through hole 105. The valve opening indicator 4 is provided with a driven gear 402 that meshes with the driving gear 6. When the operator turns the handwheel 3, the handwheel 3 drives the valve stem 5 to rotate, the valve stem 5 drives the driving gear 6 to rotate, and the driving gear 6 drives the driven gear 402 to rotate. The rotation of the driven gear 402 causes the indicator block inside the valve opening indicator 4 to move up and down. The transmission mechanism that drives the driven gear 402 to move the indicator block up and down can use an existing mechanism that can convert rotation into linear motion, such as a lead screw and nut transmission mechanism.

[0032] The valve body 13 includes a main frame and a frame liner covering the main frame. The valve body 13 has interconnected control channels 1301, inlet channels 1302, and outlet channels 1303. The valve core 12 can move up and down within the control channel 1301. When the valve core 12 moves downwards to a position blocking the space between the inlet channel 1302 and the outlet channel 1303, the diaphragm gate valve is closed. When the valve core 12 moves upwards from the blocked position to different positions, the inlet channel 1302 and the outlet channel 1303 are reconnected, allowing for different opening degrees of the diaphragm gate valve.

[0033] The valve core 12 includes a metal core skeleton 1201, a core liner 1202, and a sleeve 1203. The core liner 1202 covers the metal core skeleton 1201. The sleeve 1203 is disposed on the upper side of the metal core skeleton 1201. The sleeve 1203 has internal and external threads and is integrally connected to the metal core skeleton 1201. The sleeve 1203 is sleeved on the valve stem 5, and the internal thread of the sleeve 1203 is threadedly engaged with the drive thread section 505 of the valve stem 5. The valve core diaphragm 11 is integrally connected to the core liner 1202, and the flexible pressure cup 10 conformally fits the upper side of the valve core diaphragm 11. The pressure cup locking nut 8, the butterfly gasket 9, the middle part of the flexible pressure cup 10, and the middle part of the valve core diaphragm 11 are fitted onto the sleeve 1203 from top to bottom. The external thread of the sleeve 1203 is threadedly engaged with the pressure cup locking nut 8. The pressure cup locking nut 8 causes the butterfly gasket 9, the middle part of the flexible pressure cup 10, and the middle part of the valve core diaphragm 11 to abut against each other in sequence. The flange 1014, the edge of the flexible pressure cup 10, the edge of the valve core diaphragm 11, and the valve body 13 are sequentially arranged from top to bottom and fixedly connected by threaded fasteners. Since the sleeve 1203 cannot rotate, the valve stem 5 and the sleeve 1203 form a screw and nut transmission mechanism. By rotating the handwheel 3, the valve stem 5 can be driven to rotate. After the valve stem 5 rotates, the sleeve 1203 can drive the metal core skeleton 1201 to move up and down, thereby driving the valve core 12, the pressure bowl locking nut 8, the butterfly gasket 9, the middle part of the flexible pressure bowl 10, and the middle part of the valve core diaphragm 11 to move up and down.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A valve cover, characterized in that: The valve cover includes a valve cover body and multiple reinforcing ribs. The valve cover body has a downward-opening cavity inside. The valve cover body includes a reinforcing boss and a top cover. The reinforcing boss has a central hole that runs through it in the vertical direction. The reinforcing boss is located in the middle of the top cover. The reinforcing boss protrudes downward from the top cover and extends into the cavity. Multiple reinforcing ribs are spaced apart circumferentially between the reinforcing boss and the top cover along the central hole.

2. The valve cover according to claim 1, characterized in that: The top cover is a tapered structure that extends radially outward and downward along the central hole. The length direction of the plurality of reinforcing ribs is along the radial direction of the central hole. The radial inner side of the plurality of reinforcing ribs is conformally connected to the radial outer side of the reinforcing boss. The upper side of the plurality of reinforcing ribs is conformally connected to the lower surface of the top cover.

3. The valve cover according to claim 1, characterized in that: The top cover is provided with an indicator through hole, and the two reinforcing ribs are provided with indicator mounting holes.

4. The valve cover according to claim 3, characterized in that: The two reinforcing ribs, which are provided with the indicator mounting hole, are located on different sides of the indicator through hole in the circumferential direction.

5. The valve cover according to claim 3, characterized in that: The lower surfaces of the two reinforcing ribs, which have the indicator mounting holes, are located on the same plane.

6. The valve cover according to claim 1, characterized in that: The reinforcing ribs are evenly spaced along the circumference of the central hole.

7. The valve cover according to claim 1, characterized in that: The reinforcing boss protrudes upward from the top cover.

8. The valve cover according to claim 1, characterized in that: It also includes a bushing, which is installed in the central hole with an interference fit.

9. The valve cover according to claim 1, characterized in that: The valve cover body also includes an annular portion and a flange portion. The upper part of the annular portion is connected to the radially outer side of the top cover portion, and the lower part of the annular portion is connected to the radially inner side of the flange portion. The flange portion protrudes radially outward from the lower part of the annular portion along the central hole, and multiple bolt through holes are provided at intervals along the circumference of the central hole on the flange portion.

10. A diaphragm gate valve, characterized in that: Includes the valve cover as described in any one of claims 1-9.

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