Hand wheel opening type gate valve

Abstract

A hand wheel opening type gate valve comprises a valve body (1), a valve cover (2), a valve rod (3), a packing pressing plate (4) and a hand wheel, the valve cover (2) is installed at the top of the valve body (1), a valve plate (5) is arranged at the bottom of the valve rod (3), the valve rod (3) is installed in the valve cover (2) through a packing sealing ring (6), the valve plate (5) is located in the valve body (1), and a packing pressing sleeve (7) is arranged at the top of the packing sealing ring (6). The valve packing is tightly sealed and pressed and is not prone to loosening, the service life of the valve rod nut is long, and lubricating oil can be added according to needs.

Description

Technical Field

[0001] The utility model relates to the field of valve equipment, in particular to a hand wheel opening type gate valve. Background Art

[0002] At present, gate valves are important control components in fluid delivery systems, which have the function of opening and closing the flow of media in pipelines. During the opening and closing process, the gate valve needs to seal the gap between the outer wall of the valve stem and the inner wall of the valve cover through a packing seal, and the packing seal needs to be tightened by a packing gland. The existing packing gland and the contact surface of the pressure ring lack positioning, which makes it easy to loosen and affect the sealing effect. The existing valve stem nut is easy to be difficult to twist after long-term use, and there is a lack of a wedge-type gate valve with a long service life and the ability to add lubricating oil.

[0003] The valve handwheel is a component that is set outside the valve body and connected to the valve core to control the rotation of the valve core. The outer edge of the existing handwheel body is a flat arc shape. When turning the handwheel body, both hands are easy to slip along the direction of rotation. At the same time, the presence of the plastic layer makes the surface of the handwheel body smoother, making it difficult for the operator to hold the handwheel body tightly, and the entire rotation process is more laborious. The crank on the handwheel is mostly integrally formed and cannot be disassembled, which affects the feel of use when the crank is not needed. Utility Model Content

[0004] The purpose of the utility model is to provide a hand wheel opening type gate valve in view of the above-mentioned shortcomings.

[0005] The utility model comprises a valve body, a valve cover, a valve stem, a packing pressure plate and a hand wheel.

[0006] The valve cover is installed on the top of the valve body, and a valve plate is arranged at the bottom of the valve stem. The valve stem is installed in the valve cover through a packing sealing ring. The valve plate is located in the valve body. A packing gland is arranged on the top of the packing sealing ring. A pressure ring is arranged on the upper part of the packing gland. The top of the pressure ring is an arc-shaped protrusion. A through hole is opened in the middle of the packing pressure plate. The valve stem is located in the through hole. An arc-shaped groove matching the arc-shaped protrusion is opened at the bottom of the through hole of the packing pressure plate. The packing pressure plate is pressed on the pressure ring and fixed to the top of the valve cover by a pair of bolts. The valve plate is raised or lowered by rotating the valve stem.

[0007] A handwheel is arranged on the top of the valve stem. The handwheel comprises a hub and a rim. The hub is fixed at the center of the rim through a pair of spokes. An axial hole is opened on the hub. A pair of anti-skid protrusions are symmetrically arranged on the inner wall of the rim.

[0008] A nut bracket is arranged on the top of the valve cover, and a nut mounting groove is opened on the top of the nut bracket. The valve stem nut is movably installed in the nut mounting groove through a bearing. An external thread is arranged on the upper outer wall of the valve stem. The upper thread of the valve stem is installed in the valve stem nut. A handwheel is installed on the upper part of the valve stem nut. Turning the handwheel drives the valve stem nut to rotate in the nut mounting groove, and the valve stem nut drives the valve stem to rise or fall.

[0009] The nut bracket is detachably mounted on the top of the valve cover by bolts.

[0010] A support ring is provided on the valve stem nut, and centripetal thrust bearings are respectively provided on the top and bottom of the support ring. The valve stem nut is movably mounted in the nut mounting groove through the centripetal thrust bearings, and the upper centripetal thrust bearing is pressed by a bearing gland; a lubricating oil inlet is opened on the inner wall of the nut mounting groove, and a plug is provided on the lubricating oil inlet.

[0011] A pair of guiding protrusions are symmetrically distributed on the inner wall of the valve body, and guiding grooves matched with the guiding protrusions are respectively provided on both sides of the valve plate; a sewage discharge pipe is provided on the valve body below the valve plate, and a stop valve is provided on the sewage discharge pipe.

[0012] Threaded holes are opened on the outer wall of the hub, and locking screws are screwed into the threaded holes to fix the hub on the top of the valve stem; multiple groups of anti-slip lines are provided on the outer wall of the rim.

[0013] A group of arc-shaped anti-slip protrusions are annularly and evenly distributed on the top of the rim.

[0014] A cylindrical protrusion is provided at the connection between the spoke and the rim. An installation hole is opened at the center of the cylindrical protrusion, and a rocking handle is provided in the installation hole; the rocking handle is cylindrical; a screw rod is provided at the bottom of the rocking handle and is threadedly installed in the installation hole of the cylindrical protrusion.

[0015] Reinforcing ribs are respectively provided on both sides at the connection between the spoke and the rim.

[0016] A pair of spokes and a pair of anti-slip protrusions are arranged in a cross shape.

[0017] The advantages of the present utility model are as follows:

[0018] 1. The valve packing seal is tightly pressed and not prone to loosening. The valve stem nut has a long service life and can add lubricating oil as needed.

[0019] 2. The overall structure of the handwheel is simple. A pair of spokes are used to connect the hub and the rim, and the rotation feel is good.

[0020] 3. The handwheel is not prone to slipping during rotation.

[0021] 4. The rocking handle is detachable and can be installed as needed. Brief Description of the Drawings

[0022] Figure 1 is a schematic cross-sectional structure view of the present utility model.

[0023] Figure 2 is a schematic structure view of the packing seal ring of the present utility model.

[0024] Figure 3It is a schematic structural view of the valve stem nut of the present utility model.

[0025] Figure 4 It is a schematic structural view of the handwheel of the present utility model.

[0026] Figure 5 It is a schematic structural view of the handwheel for installing a crank of the present utility model. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] 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 claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship when the product of the present invention is normally placed. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "connected" are 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] As shown in the attached drawings, the utility model includes a valve body 1, a valve cover 2, a valve stem 3, a packing gland 4 and a handwheel.

[0033] The valve cover 2 is installed on the top of the valve body 1. A valve plate 5 is provided at the bottom of the valve stem 3. The valve stem 3 is installed in the valve cover 2 through a packing seal ring 6. The valve plate 5 is located inside the valve body 1. A packing sleeve 7 is provided at the top of the packing seal ring 6. A pressure ring 8 is provided above the packing sleeve 7. The top of the pressure ring 8 is an arc-shaped protrusion. A through hole is opened in the middle of the packing gland 4. The valve stem 3 is located in the through hole. An arc-shaped groove matching the arc-shaped protrusion is opened at the bottom of the through hole of the packing gland 4. The packing gland 4 presses on the pressure ring 8 and is fixed to the top of the valve cover 2 by a pair of bolts. Rotating the valve stem 3 drives the valve plate 5 to rise or fall.

[0034] A handwheel 11 is provided at the top of the valve stem 3. The handwheel 11 includes a hub 101 and a rim 102. The hub 101 is fixed at the center of the rim 102 through a pair of spokes 103. A shaft hole 104 is opened in the hub 101. A pair of anti-slip protrusions 105 are symmetrically distributed on the inner wall of the rim 102.

[0035] A nut bracket 9 is provided at the top of the valve cover 2. A nut installation groove is opened at the top of the nut bracket 9. The valve stem nut 10 is movably installed in the nut installation groove through a bearing. External threads are provided on the outer wall of the upper part of the valve stem 3. The upper part of the valve stem 3 is threadedly installed in the valve stem nut 10. The handwheel 11 is installed on the upper part of the valve stem nut 10. Rotating the handwheel 11 drives the valve stem nut 10 to rotate in the nut installation groove, and the valve stem nut 10 drives the valve stem 3 to rise or fall.

[0036] The nut bracket 9 is detachably installed on the top of the valve cover 2 through bolts.

[0037] A support ring is provided on the valve stem nut 10. Centripetal thrust bearings 12 are respectively provided at the top and bottom of the support ring. The valve stem nut 10 is movably installed in the nut installation groove through the centripetal thrust bearings 12, and the upper centripetal thrust bearing 12 is pressed by a bearing gland 13; a lubricating oil filling port is opened on the inner wall of the nut installation groove, and a plug 14 is provided on the lubricating oil filling port.

[0038] A pair of guiding protrusions are symmetrically distributed on the inner wall of the valve body 1. Guiding grooves matching the guiding protrusions are respectively provided on both sides of the valve plate 5; a sewage discharge pipe is provided on the valve body 1 below the valve plate 5, and a stop valve is provided on the sewage discharge pipe.

[0039] Threaded holes are opened on the outer wall of the hub 101. Locking screws are screwed into the threaded holes to fix the hub 101 to the top of the valve stem 3; multiple groups of anti-slip patterns are provided on the outer wall of the rim 102.

[0040] A group of arc-shaped anti-slip protrusions 106 are annularly and evenly distributed on the top of the rim 102.

[0041] A cylindrical protrusion 108 is provided at the connection between the spoke 103 and the rim 102. An installation hole is opened at the center of the cylindrical protrusion 108, and a crank 107 is arranged in the installation hole; the crank 107 is cylindrical; a screw rod is provided at the bottom of the crank 107, and the crank 107 is threadedly installed in the installation hole of the cylindrical protrusion 108 through the screw rod.

[0042] Reinforcing ribs are respectively arranged on both sides of the connection between the spoke 103 and the rim 102.

[0043] A pair of spokes 103 and a pair of anti-slip protrusions 105 are arranged in a cross shape.

[0044] Embodiment 1: When opening the valve, rotate the handwheel 11 forward. The handwheel 11 drives the valve stem nut 10 to rotate. The valve stem nut 10 is supported by a pair of angular contact thrust bearings 12, so that the valve stem nut 10 can rotate smoothly between the bearing gland 13 and the inner bottom surface of the nut installation groove. When the valve stem nut 10 rotates, it drives the valve stem 3 to move upward through thread matching, so that the valve plate 5 rises, and the inner cavity of the valve body 1 is connected. When closing the valve, rotate the handwheel 11 backward. The handwheel 11 drives the valve stem nut 10 to rotate. When the valve stem nut 10 rotates, it drives the valve stem 3 to move downward through thread matching, so that the valve plate 5 descends, and the inner cavity of the valve body 1 is closed. When the packing gland 4 presses the packing ring 8, the arc-shaped protrusion of the packing ring 8 is located in the arc-shaped groove of the packing gland 4, making the packing gland 4 more accurate when being pressed and not easy to loosen.

[0045] The hub 101 is installed on the valve stem. For long-term installation, screw the locking screw into the threaded hole on the outer wall of the hub 101 to press against the outer wall of the valve stem to complete the fixation. When the handwheel is installed on a side-mounted valve, the crank 107 can be installed in the installation hole of the cylindrical protrusion 108, and the handwheel can be driven to rotate by the crank. When starting to rotate the handwheel, the staff's hand is blocked by the anti-slip protrusion 105 to avoid slipping. At the same time, both the arc-shaped anti-slip protrusion 106 and the anti-slip pattern can play an auxiliary role in avoiding slipping.

Claims

1. A hand wheel open gate valve, characterized in that It comprises a valve body (1), a valve cover (2), a valve stem (3), a packing pressure plate (4) and a hand wheel. The valve cover (2) is installed on the top of the valve body (1), and a valve plate (5) is arranged at the bottom of the valve stem (3). The valve stem (3) is installed in the valve cover (2) through a packing seal ring (6). The valve plate (5) is located in the valve body (1). A packing gland (7) is arranged on the top of the packing seal ring (6). A pressure ring (8) is arranged on the upper part of the packing gland (7). The top of the pressure ring (8) is an arc-shaped protrusion. A through hole is opened in the middle of the packing gland (4). The valve stem (3) is located in the through hole. An arc-shaped groove matching the arc-shaped protrusion is opened at the bottom of the through hole of the packing gland (4). The packing gland (4) is pressed on the pressure ring (8) and is fixed to the top of the valve cover (2) by a pair of bolts. The valve stem (3) is rotated to drive the valve plate (5) to rise or fall. A hand wheel (11) is arranged at the top of the valve stem (3), and the hand wheel (11) comprises a hub (101) and a rim (102). The hub (101) is fixed at the center of the rim (102) through a pair of spokes (103). An axial hole (104) is opened on the hub (101), and a pair of anti-slip protrusions (105) are symmetrically distributed on the inner wall of the rim (102).

2. A hand-wheel-opened gate valve according to claim 1, characterized in that: A nut bracket (9) is arranged on the top of the valve cover (2), a nut mounting groove is opened on the top of the nut bracket (9), a valve stem nut (10) is movably installed in the nut mounting groove through a bearing, an outer thread is arranged on the upper outer wall of the valve stem (3), the upper thread of the valve stem (3) is installed in the valve stem nut (10), a hand wheel (11) is installed on the upper part of the valve stem nut (10), and the hand wheel (11) is turned to drive the valve stem nut (10) to rotate in the nut mounting groove, and the valve stem nut (10) drives the valve stem (3) to rise or fall.

3. A hand-wheel-opened gate valve according to claim 2, characterized in that: The nut bracket (9) is detachably mounted on the top of the valve cover (2) by means of bolts.

4. A hand-wheel-opened gate valve according to claim 3, characterized in that: A support ring is arranged on the valve stem nut (10), and radial thrust bearings (12) are arranged on the top and bottom of the support ring respectively. The valve stem nut (10) is movably installed in the nut installation groove through the radial thrust bearing (12), and the radial thrust bearing (12) on the top is pressed by the bearing pressure cover (13); a lubricating oil inlet is opened on the inner wall of the nut installation groove, and a plug (14) is arranged on the lubricating oil inlet.

5. A hand-wheel-opened gate valve according to claim 1, characterized in that: A pair of guide protrusions are arranged on the inner wall of the valve body (1) in a mirror-image distribution, and guide grooves matching the guide protrusions are arranged on both sides of the valve plate (5); a sewage pipe is arranged on the valve body (1) below the valve plate (5), and a stop valve is arranged on the sewage pipe.

6. A hand-wheel-opened gate valve according to claim 1, characterized in that: A threaded hole is formed on the outer wall of the wheel hub (101), and a locking screw is screwed into the threaded hole to fix the wheel hub (101) on the top of the valve stem (3); and a plurality of groups of anti-skid patterns are formed on the outer wall of the wheel rim (102).

7. A hand-wheel-opened gate valve according to claim 1, characterized in that: A group of arc-shaped anti-slip protrusions (106) are evenly distributed in an annular shape on the top of the wheel rim (102).

8. A hand-wheel-opened gate valve according to claim 1, characterized in that: A cylindrical protrusion (108) is provided at the connection between the spoke (103) and the rim (102); a mounting hole is provided at the center of the cylindrical protrusion (108); a crank (107) is provided in the mounting hole; the crank (107) is cylindrical; a screw is provided at the bottom of the crank (107) and is mounted in the mounting hole of the cylindrical protrusion (108) through the screw thread.

9. A hand-wheel-opened gate valve according to claim 1, characterized in that: Reinforcing ribs are respectively arranged on both sides of the connection between the spoke (103) and the rim (102).

10. A hand-wheel-opened gate valve according to claim 1, characterized in that: A pair of wheel spokes (103) and a pair of anti-slip protrusions (105) are arranged in a cross shape.

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