Rotary support stable type non-rising stem gate valve

Abstract

The utility model relates to the related field of non-rising stem gate valves, in particular to a rotary supporting stable type non-rising stem gate valve which comprises a valve body, a hand wheel, a rod body, a threaded rod, a valve plate, a supporting ring, an arc-shaped lining plate, a supporting ball, an annular groove, a gasket, a dustproof sleeve, a guide assembly and the like. The supporting ring, the arc-shaped lining plate, the supporting ball and the guide assembly are arranged, the valve rod drives the arc-shaped lining plate and the supporting ball to rotate when rotating, the supporting ball rolls in the annular groove, and the supporting ball is matched with the annular groove to provide horizontal rotating support for the valve rod. Friction resistance during rotation of the valve rod can be greatly reduced, operation is more convenient, the ball structure can effectively disperse abrasion, the valve rod and the valve body are protected against direct abrasion, stability of the valve rod in the rotating process is improved, the guide ball is matched with the guide groove to provide auxiliary support for the bottom of the valve rod, and the service life of the valve rod is prolonged. And the stability of the valve rod in the rotating process is further improved.

Description

Technical Field

[0001] The utility model relates to the relevant field of concealed stem gate valves, in particular to a rotary support stable concealed stem gate valve. Background Art

[0002] The concealed stem gate valve is a type of valve mainly used in fluid control systems to regulate or block the flow of fluid. The "concealed stem" in its name means that the valve stem is not directly exposed outside the valve body, but is hidden inside the valve body or only a small part is exposed. When the valve is opened and closed, the valve stem itself will not move up and down much, which makes it more suitable for occasions where space is limited or the valve stem needs to be hidden. The advantages of concealed stem gate valves include saving space, preventing corrosion of the valve stem by the external environment, and being suitable for flammable and explosive environments.

[0003] The valve stem of the existing concealed-stem gate valve is usually directly connected to the valve body, and the friction resistance between the valve stem and the valve body is large, which makes it difficult to operate the valve stem and the protection effect of the valve stem is poor. After long-term use, the valve stem and the valve body are prone to wear, which may affect the stability of the valve stem during rotation and the stability of the concealed-stem gate valve during opening and closing. At the same time, the valve stem usually does not directly reach the bottom of the valve body, which makes the support effect on the bottom of the valve stem poor, and is also easy to affect the stability of the valve stem during rotation. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a rotary support stable concealed stem gate valve to solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rotary support stabilized concealed stem gate valve, comprising a valve body, a hand wheel arranged above the valve body, and a rod body fixedly mounted at the middle of the bottom end surface of the hand wheel, the rod body being movably connected with the top of the inner side of the valve body, and a threaded rod being arranged at the bottom of the rod body, the rod body and the threaded rod forming a valve stem, a valve plate slidably connected with the inside of the valve body being threadedly mounted on the threaded rod, and a support ring being fixedly mounted at the inner top of the valve body;

[0006] A guide assembly is provided at the outer bottom of the threaded rod;

[0007] The support ring has a plurality of arc-shaped lining plates connected to the rod body, the plurality of arc-shaped lining plates are enclosed in a ring shape, and a plurality of supporting balls are embedded outside each arc-shaped lining plate, and the supporting balls are rollingly connected to the inner side of the annular groove provided on the inner ring of the support ring;

[0008] The guide assembly includes a cylindrical rod arranged at the bottom of the threaded rod, a collar movably mounted on the cylindrical rod, a plurality of guide balls embedded in the side surface of the collar, and the guide balls are rollingly connected to the inner side of a guide groove vertically opened on the inner wall of the valve plate.

[0009] Preferably, a dust cover is fixedly mounted on the top surface of the valve body, and the inner ring of the dust cover is movably connected to the rod body.

[0010] Preferably, the dustproof cover is a silicone cover.

[0011] Preferably, a lining is fixedly provided on the inner wall of the annular groove, and the lining is movably connected to the supporting ball.

[0012] Preferably, a convex plate is provided on each side of the arc-shaped lining plate, and the two convex plates on two adjacent arc-shaped lining plates and close to each other are fixed by bolt locking.

[0013] Preferably, a distance is provided between the outer surface of the arc-shaped lining plate and the inner ring of the support ring.

[0014] Beneficial effects of the utility model:

[0015] The utility model is provided with a support ring, an arc-shaped lining plate, a support ball and a guide assembly. When the valve stem rotates, the arc-shaped lining plate and the support ball are driven to rotate. The support ball rolls in the annular groove. The support ball cooperates with the annular groove to provide horizontal rotation support for the valve stem. Compared with traditional sliding friction, the friction resistance during the rotation of the valve stem can be greatly reduced, making the operation easier. The ball structure can effectively disperse the wear and protect the valve stem and the valve body from direct wear, which is beneficial to improving the stability of the valve stem during rotation. The guide ball cooperates with the guide groove to provide auxiliary support to the bottom of the valve stem, which is beneficial to further improve the stability of the valve stem during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure of the arc lining plate of the utility model from a top view;

[0018] Figure 3 The utility model Figure 1 A schematic diagram of the enlarged structure in the middle.

[0019] Including: valve body-1, handwheel-2, rod body-3, threaded rod-4, valve plate-5, support ring-6, arc lining plate-7, support ball-8, annular groove-9, lining-10, dust cover-11, guide assembly-12, convex plate-13, bolt-14, cylindrical rod-1201, ring-1202, guide ball-1203, guide groove-1204. DETAILED DESCRIPTION

[0020] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0021] like Figure 1As shown, the utility model provides a rotary support stable concealed stem gate valve, comprising a valve body 1, a hand wheel 2 arranged above the valve body 1, and a rod body 3 vertically fixed to the middle of the bottom end surface of the hand wheel 2, the rod body 3 is rotatably connected to the top of the inner side of the valve body 1, the rod body 3 can rotate horizontally inside the valve body 1, and a threaded rod 4 is coaxially arranged at the bottom of the rod body 3, the rod body 3 and the threaded rod 4 form a valve stem, and a valve plate 5 slidably connected to the inside of the valve body 1 is threadedly installed on the threaded rod 4, so that the valve plate 5 can be driven to move vertically in the valve body 1 when the threaded column 4 rotates;

[0022] Specifically, when in use, the two ends of the valve body 1 are respectively connected to the external pipelines. When the gate valve needs to be opened, the hand wheel 2 can be turned to drive the rod body 3 and the threaded rod 4 to rotate, and the threaded rod 4 drives the valve plate 5 to move vertically upward in the valve body 1 to open the gate valve, and the medium can pass through the valve body 1. The reverse rotation of the hand wheel 2 can drive the valve plate 5 to move vertically downward in the valve body 1 to close the gate valve. At this time, the medium cannot flow through the valve body 1.

[0023] like Figures 1 to 3 As shown, in this embodiment, a support ring 6 is locked and fixed on the inner top of the valve body 1;

[0024] A guide assembly 12 is provided at the outer bottom of the threaded rod 4 to provide auxiliary support for the valve stem;

[0025] The support ring 6 has six arc-shaped lining plates 7 that are clamped with the rod body 3. The six arc-shaped lining plates 7 are enclosed in a ring shape, and a number of supporting balls 8 are movably embedded on each arc-shaped lining plate 7. The supporting balls 8 are rollingly connected to the inner side of the annular groove 9 provided on the inner ring of the support ring 6. The supporting balls 8 can roll horizontally along the inner side of the annular groove 9. The supporting balls 8 cooperate with the annular groove 9 to provide rotation support for the valve stem, thereby improving the stability of the valve stem during rotation.

[0026] The guide assembly 12 includes a cylindrical rod 1201 with an integrated structure arranged at the bottom of the threaded rod 4, a collar 1202 movably sleeved on the cylindrical rod 1201, the cylindrical rod 1201 can rotate horizontally inside the collar 1202, a plurality of guide balls 1203 are embedded in the side surface of the collar 1202, the guide balls 1203 are rollingly connected to the inner side of a guide groove 1204 vertically opened on the inner wall of the valve plate 5, the guide groove 1204 can move vertically up and down along the guide balls 1203, and the guide balls 1203 cooperate with the guide groove 1204 to provide auxiliary support for the threaded rod 4, thereby improving the stability of the threaded rod 4 during rotation;

[0027] In this embodiment, a dust cover 11 is fixedly mounted on the top surface of the valve body 1, and the inner ring of the dust cover 11 is movably connected to the rod body 3, thereby improving the dustproof effect in the valve body 1 and reducing the entry of external dust and impurities into the valve body 1;

[0028] In this embodiment, the dust cover 11 is a silicone cover, which is not easily aged due to environmental factors and has a longer service life;

[0029] In this embodiment, a lining 10 is fixedly provided on the inner wall of the annular groove 9, and the lining 10 is movably connected to the supporting ball 8 to provide protection for the inner side of the annular groove 9 and reduce the wear of the inner side of the annular groove 9;

[0030] In this embodiment, the lining 10 is made of polytetrafluoroethylene, which has a low friction coefficient, is conducive to supporting the ball 8 to roll quickly, and has the advantages of wear resistance and corrosion resistance, and has a longer service life;

[0031] In this embodiment, a convex plate 13 is provided on each side of the arc-shaped lining plate 7, and two convex plates 13 on two adjacent arc-shaped lining plates 7 and close to each other are locked and fixed by bolts 14, which is conducive to separate disassembly and replacement of each arc-shaped lining plate 7, thereby reducing the replacement cost of the arc-shaped lining plate 7;

[0032] Among them, a gap is set between the outer surface of the arc lining plate 7 and the inner ring of the support ring 6 to reduce the friction between the arc lining plate 7 and the support ring 6, which is conducive to the rapid rotation of the valve stem;

[0033] Specifically, when the valve stem rotates, it drives the arc lining plate 7 to rotate synchronously, and the arc lining plate 7 drives the supporting ball 8 to roll in the annular groove 9. The supporting ball 8 cooperates with the annular groove 9 to provide auxiliary rotation support for the valve stem, thereby improving the stability of the valve stem during rotation. In addition, the supporting ball 8 cooperates with the annular groove 9 to replace the original valve stem to directly contact the valve body 1 over a large area, so that the friction resistance is smaller, making the operation easier, while reducing the operating torque, and making it easier to operate the concealed stem gate valve.

[0034] In addition, when opening and closing the concealed-stem gate valve, the threaded rod 4 drives the cylindrical rod 1201 to rotate synchronously, and the cylindrical rod 1201 rotates in the collar 1202. The valve plate 5 drives the guide groove 1204 to move up and down along the guide ball 1203 during the opening and closing process. The collar 1202 and the guide ball 1203 cooperate with the guide groove 1204 to provide auxiliary rotation support for the lower end of the valve stem, thereby further improving the stability of the valve stem during rotation, and thereby improving the stability of the concealed-stem gate valve during opening and closing.

[0035] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A swing-supported stable concealed-stem gate valve, comprising a valve body, a hand wheel arranged above the valve body, a rod body fixedly mounted at the middle of the bottom end surface of the hand wheel, the rod body being movably connected to the top of the inner side of the valve body, and a threaded rod being arranged at the bottom of the rod body, the rod body and the threaded rod forming a valve stem, and a valve plate slidably connected to the inside of the valve body being threadedly mounted on the threaded rod; It is characterized in that A support ring is fixedly mounted on the inner top of the valve body; A guide assembly is provided at the outer bottom of the threaded rod; The support ring has a plurality of arc-shaped lining plates connected to the rod body, the plurality of arc-shaped lining plates are enclosed in a ring shape, and a plurality of supporting balls are embedded outside each arc-shaped lining plate, and the supporting balls are rollingly connected to the inner side of the annular groove provided on the inner ring of the support ring; The guide assembly includes a cylindrical rod arranged at the bottom of the threaded rod, a collar movably mounted on the cylindrical rod, a plurality of guide balls embedded in the side surface of the collar, and the guide balls are rollingly connected to the inner side of a guide groove vertically opened on the inner wall of the valve plate.

2. According to claim 1, a swing-supported, non-rising-stem gate valve is characterized in that: A dust cover is fixedly mounted on the top surface of the valve body, and the inner ring of the dust cover is movably connected to the rod body.

3. According to claim 2, a swing-stabilized concealed-stem gate valve is characterized in that: The dustproof cover is a silicone cover.

4. According to claim 1, a swing-supported, non-rising-stem gate valve is characterized in that: A lining is fixedly arranged on the inner wall of the annular groove, and the lining is movably connected with the supporting ball.

5. According to claim 1, a swing-stabilized concealed-stem gate valve is characterized in that: A convex plate is arranged on each side of the arc-shaped lining plate, and two convex plates on two adjacent arc-shaped lining plates and close to each other are locked and fixed by bolts.

6. According to claim 1, a swing-stabilized concealed-stem gate valve is characterized in that: A spacing is provided between the outer surface of the arc-shaped lining plate and the inner ring of the support ring.

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