Self-positioning stop valve

Abstract

The utility model relates to a self -positioning stop valve in valve door subassembly technical field, including valve body, valve rod and valve petal subassembly, the inside of valve body is equipped with the first flow channel and second flow channel of two -way conduction, is equipped with the hole of two -way conduction between the first flow channel and second flow channel, valve petal subassembly is movably connected in the inside of valve body through valve rod, the bottom end of valve petal subassembly is rotatable valve core, and valve core is spheroid structure, and the one end of hole -through hole is equipped with the steel ring near valve petal subassembly, and the aperture of steel ring is less than the diameter of valve core, and steel ring rotatably sleeve joint in the opening of hole -through hole, when valve core is inlayed in hole -through hole through valve petal subassembly, valve core and steel ring abut, valve core and steel ring abut, and the rotation of valve rod and valve core can rotate through contact steel ring, reduced the abrasion between spheroid valve core and hole -through hole, guaranteed the leakproofness between valve core and valve body.

Description

Technical Field

[0001] This utility model relates to the field of valve assembly technology, and in particular to a self-positioning shut-off valve. Background Technology

[0002] A gate valve is a commonly used type of valve, generally consisting of a valve body, valve stem, valve disc, and valve cover. A sealing packing is provided between the valve cover and the valve stem. The valve stem is drivenly connected to the valve disc. A bracket is also fixed on the valve cover, and a valve stem nut that matches the valve stem is installed in the bracket. Gate valves are mainly used in pipelines for shut-off, throttling, distribution, and changing the flow of media.

[0003] The existing Chinese invention patent with publication number CN102155543B discloses a self-positioning shut-off valve. The valve disc is a ball, movably positioned within a valve disc sleeve. The diameter of the bottom hole of the valve disc sleeve is slightly smaller than the diameter of the valve disc, and a valve disc cover is fixed to the upper end of the valve disc sleeve. The ball-shaped valve disc allows for free rotation, and after self-positioning and mating with the sealing seat of the valve body, it forms a non-overlapping line contact sealing structure, thus providing excellent sealing performance. Furthermore, when the ball leaves the sealing seat, the high-speed fluid in the pipeline flushes the ball from all directions, removing deposits on the sealing surface and achieving self-cleaning.

[0004] However, when the valve disc closes with the through hole in the valve body, the spherical valve disc rotates with the valve stem, causing friction between the spherical valve disc and the through hole. Over time, this leads to severe wear on the spherical valve disc, resulting in a decrease in the sealing performance of the gate valve. Therefore, there is an urgent need to develop a self-positioning gate valve to meet the needs of practical applications. Utility Model Content

[0005] The purpose of this invention is to provide a self-positioning shut-off valve to solve the above-mentioned defects.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] The self-positioning shut-off valve includes a valve body, a valve stem, and a valve disc assembly. The valve body has a first flow channel and a second flow channel that connect two ends. A through hole is opened between the first flow channel and the second flow channel. The valve disc assembly is movably connected to the inside of the valve body through the valve stem. The bottom end of the valve disc assembly is a rotatable valve core with a spherical structure. A steel ring is provided at the end of the through hole near the valve disc assembly. The diameter of the steel ring is smaller than the diameter of the valve core. The steel ring is rotatably fitted into the opening of the through hole. When the valve core is embedded in the through hole through the valve disc assembly, the valve core abuts against the steel ring.

[0008] As a further embodiment of the above description, the top of the valve body is provided with an installation opening, the valve disc assembly is installed inside the valve body through the installation opening, a detachable valve cover is provided at the installation opening, and the valve stem is telescopically located in the middle of the valve cover.

[0009] In the above description, as a further embodiment, the top end of the valve stem is a threaded end, and the bottom end of the valve stem is a drive end. The drive end extends through the valve cover into the interior of the valve body and connects with the valve disc assembly.

[0010] As a further embodiment, the valve cover is provided with a valve stem nut above it. The middle part of the valve stem nut is threaded to the threaded end of the valve stem. Fixed threaded rods are provided on both sides of the valve stem nut. The bottom end of the fixed threaded rods is threaded to the valve cover.

[0011] As a further embodiment, the valve disc assembly also includes a valve core sleeve. The bottom of the valve core sleeve has an embedding opening, the valve core is embedded inside the valve core sleeve, and the lower hemisphere of the valve core is engaged in the embedding opening. The driving end of the valve stem extends through the valve core sleeve into the interior of the valve core sleeve.

[0012] As a further embodiment, the valve stem is also provided with a rotating handwheel at the top, which is fixedly connected to the top of the valve stem.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: a rotatable valve core is adopted at the bottom of the valve disc assembly, and the valve core has a spherical structure. At the same time, a rotatable steel ring is set at the opening of the guide hole. The diameter of the steel ring is smaller than the diameter of the valve core. When the valve core is embedded in the guide hole through the valve disc assembly, the valve core abuts against the steel ring. Therefore, when the valve stem drives the valve disc assembly to move up and down by thread, the valve core abuts against the steel ring. Moreover, the rotational movement of the valve stem and the valve core can be achieved by contacting the steel ring, which reduces the wear between the spherical valve core and the guide hole and ensures the sealing between the valve core and the valve body. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the self-positioning shut-off valve described in this embodiment;

[0015] Figure 2 This is a cross-sectional view of the self-positioning shut-off valve described in this embodiment under the first structure.

[0016] Figure 3 This is a cross-sectional view of the self-positioning shut-off valve described in this embodiment under the second structure.

[0017] Figure 4 for Figure 2 A magnified schematic diagram of the structure of part A in the diagram;

[0018] In the diagram: 1-valve body, 11-first flow channel, 12-second flow channel, 13-through hole, 14-installation opening, 2-valve core, 3-steel ring, 31-valve core sleeve, 4-valve cover, 5-valve stem, 51-threaded end, 52-drive end, 6-valve stem nut, 61-fixed threaded rod, 7-rotating handwheel. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] For this embodiment, please refer to Figures 1-4 The self-positioning shut-off valve specifically implemented includes a valve body 1, a valve stem 5, and a valve disc assembly. The valve body 1 has a first flow channel 11 and a second flow channel 12 that connect the two ends. A through hole 13 is opened between the first flow channel 11 and the second flow channel 12. The valve disc assembly is movably connected to the inside of the valve body 1 through the valve stem 5. The bottom end of the valve disc assembly is a rotatable valve core 2. The valve core 2 has a spherical structure. A steel ring 3 is provided at one end of the through hole 13 near the valve disc assembly. The diameter of the steel ring 3 is smaller than the diameter of the valve core 2. The steel ring 3 is rotatably fitted into the opening of the through hole 13. When the valve core 2 is embedded in the through hole 13 through the valve disc assembly, the valve core 2 abuts against the steel ring 3. A rotating handwheel 7 is also provided at the top of the valve stem 5. The rotating handwheel 7 is fixedly connected to the top of the valve stem 5.

[0021] A rotatable valve core 2 with a spherical structure is used at the bottom of the valve disc assembly. A rotatable steel ring 3 is set at the opening of the guide hole 13. The diameter of the steel ring 3 is smaller than the diameter of the valve core 2. When the valve core 2 is embedded in the guide hole 13 through the valve disc assembly, the valve core 2 and the steel ring 3 abut against each other. Therefore, when the valve stem 5 drives the valve disc assembly to move up and down by thread, the valve core 2 and the steel ring 3 abut against each other. The rotation of the valve stem 5 and the valve core 2 can be achieved by contacting the steel ring 3, which reduces the wear between the spherical valve core 2 and the guide hole 13 and ensures the sealing between the valve core 2 and the valve body 1.

[0022] Specifically, such as Figure 2 As shown, the valve body 1 has an installation opening 14 at its top. The valve disc assembly is installed inside the valve body 1 through the installation opening 14. A detachable valve cover 4 is provided at the installation opening 14. The valve stem 5 is telescopically located in the middle of the valve cover 4. The top of the valve stem 5 is a threaded end 51, and the bottom of the valve stem 5 is a drive end 52. The drive end 52 extends through the valve cover 4 into the interior of the valve body 1 and connects with the valve disc assembly.

[0023] Specifically, such as Figure 3As shown, a valve stem nut 6 is also provided above the valve cover 4. The middle part of the valve stem nut 6 is threadedly connected to the threaded end 51 of the valve stem 5. Fixed threaded rods 61 are provided on both sides of the valve stem nut 6, and the bottom end of the fixed threaded rods 61 is threadedly fixed to the valve cover 4. By fixing the valve stem nut 6 above the valve cover 4 with the fixed threaded rods 61, the fixed threaded rods 61 can be threadedly connected to the threaded end 51 of the valve stem nut 6, thereby driving the valve disc assembly to move the ball valve core 2 up and down above the guide hole 13.

[0024] Specifically, such as Figure 4 As shown, the valve disc assembly also includes a valve core sleeve 31. The bottom of the valve core sleeve 31 has an insertion opening. The valve core 2 is embedded inside the valve core sleeve 31, and the lower hemisphere of the valve core 2 is engaged in the insertion opening. The driving end 52 of the valve stem 5 extends through the valve core sleeve 31 into its interior. When installing the valve disc assembly, the spherical valve core 2 is inserted into the interior of the valve core sleeve 31, and then the valve stem 5 is passed through the top surface of the valve core sleeve 31, so that the lower hemisphere of the valve core 2 is engaged in the insertion opening. The lower hemisphere of the valve core 2 can be positioned at the through hole 13 through the up and down movement of the valve stem 5 to form a conductive and closed structure.

[0025] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A self-positioning stop valve, comprising a valve body, a valve stem and a valve disc assembly, the valve body is internally provided with a first flow channel and a second flow channel which are communicated at two ends, and a communication hole is arranged between the first flow channel and the second flow channel, characterized in that: The valve disc assembly is movably connected to the inside of the valve body via the valve stem. The bottom end of the valve disc assembly is a rotatable valve core with a spherical structure. A steel ring is provided at one end of the through hole near the valve disc assembly. The diameter of the steel ring is smaller than the diameter of the valve core. The steel ring is rotatably fitted onto the opening of the through hole. When the valve core is embedded in the through hole through the valve disc assembly, the valve core abuts against the steel ring.

2. The self-positioning stop valve of claim 1, wherein: The valve body has an installation opening at its top, and the valve disc assembly is installed inside the valve body through the installation opening. A detachable valve cover is provided at the installation opening, and the valve stem is telescopically located in the middle of the valve cover.

3. The self-positioning stop valve of claim 2, wherein: The top end of the valve stem is a threaded end, and the bottom end of the valve stem is a drive end. The drive end extends through the valve cover into the interior of the valve body and connects with the valve disc assembly.

4. The self-positioning stop valve of claim 3, wherein: A valve stem nut is also provided above the valve cover. The middle part of the valve stem nut is threadedly connected to the threaded end of the valve stem. Fixed threaded rods are provided on both sides of the valve stem nut. The bottom end of the fixed threaded rod is threadedly fixed to the valve cover.

5. The self-positioning stop valve of claim 4, wherein: The valve disc assembly also includes a valve core sleeve, the bottom of which has an embedding opening. The valve core is embedded inside the valve core sleeve, and the lower hemisphere of the valve core is engaged in the embedding opening. The driving end of the valve stem extends through the valve core sleeve into the interior of the valve core sleeve.

6. A self-positioning stop valve according to any one of claims 1-5, characterized in that: The valve stem is also provided with a rotating handwheel at the top, which is fixedly connected to the top of the valve stem.

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