Stop valve with sealing structure

Abstract

The utility model provides a stop valve with a sealing structure, which relates to the technical field of valves and comprises a hand wheel, a valve rod nut arranged at the top of the hand wheel, a valve rod arranged at the bottom of the valve rod nut, T-shaped bolts arranged on two sides of the valve rod, a packing gland arranged at the bottom of the valve rod, a valve cover arranged at the bottom of the packing gland and a valve body arranged at the bottom of the valve cover. A packing gland is arranged in the valve rod, packing is arranged in the packing gland, a metal sealing ring is arranged on the outer side of the valve cover, a sealing ring is arranged at the bottom of the metal sealing ring, a split circular ring is arranged at the bottom end of the valve rod, a valve clack is arranged at the bottom of the split circular ring, and an ultrasonic sensor is arranged at the bottom end in the valve body. The main seal prevents medium leakage by means of a high-performance elastic material sealing ring, and the auxiliary seal enhances the sealing reliability by means of a metal sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a gate valve with a sealing structure. Background Technology

[0002] According to Chinese Patent No. CN115574107A, a gate valve sealing structure and a gate valve are disclosed. The gate valve sealing structure includes a valve seat, a valve disc, and an elastic sealing ring. The valve disc is slidably fitted in the inner cavity of the valve seat. The inner cavity of the valve seat is provided with a first conical surface. The valve disc is provided with a second conical surface opposite to the first conical surface. At least one of the first conical surface and the second conical surface is an elastic conical surface. The elastic sealing ring surrounds the first conical surface and is connected to one of the valve seat and the valve disc. When the first conical surface and the second conical surface abut, the elastic sealing ring presses against the other of the valve seat and the valve disc.

[0003] The aforementioned comparative documents and existing technologies have the following technical problems: In the current field of industrial fluid control, the sealing performance of gate valves is crucial, but the sealing performance of existing gate valves is not efficient enough, resulting in poor performance. A more reliable gate valve sealing structure is needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a shut-off valve with a sealing structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a stop valve with a sealing structure, including a handwheel, a valve stem nut at the top of the handwheel, a valve stem at the bottom of the valve stem nut, T-bolts on both sides of the valve stem, a packing gland at the bottom of the valve stem, a valve cover at the bottom of the packing gland, a valve body at the bottom of the valve cover, packing inside the packing gland, a metal sealing ring on the outer side of the valve cover, a sealing ring at the bottom of the metal sealing ring, a split ring at the bottom of the valve stem, a valve disc at the bottom of the split ring, and an ultrasonic sensor at the bottom of the valve body.

[0006] Preferably, the top of the valve stem is threaded, and the top of the valve stem is connected to the handwheel via the thread.

[0007] Preferably, a connecting plate is provided on the outer side of the valve stem, and a T-bolt is provided on the top of the connecting plate, and the valve stem passes through the interior of the valve body.

[0008] Preferably, the valve cover has a packing gland on its inner side, and the valve cover includes flanges that are connected to each other by bolts.

[0009] Preferably, the valve cover is provided with a metal sealing ring and a sealing ring inside, and a valve stem is provided on the inner side of the metal sealing ring and the inner side of the sealing ring.

[0010] Preferably, the valve disc has a valve disc cover at the top and an elastic pad at the bottom.

[0011] Preferably, the sealing ring is made of a high-performance elastic material, and the valve body is made of a hard alloy material.

[0012] Beneficial effects

[0013] This invention employs a metal sealing ring and a sealing ring to achieve a dual sealing design. The main seal uses a sealing ring made of high-performance elastic material to ensure a tight fit between the valve seat and valve stem under conditions of high pressure differential and large temperature changes, effectively preventing media leakage. The auxiliary seal uses a metal sealing ring, which provides additional sealing protection when the main seal wears or ages due to long-term use, further enhancing the sealing reliability of the valve.

[0014] In this invention, a valve disc is used, and the valve body is made of hard alloy material, which is precision ground and has extremely low surface roughness. When it is in contact with the valve disc, it can form an excellent sealing surface. The valve disc adopts an elastic deformation design. During the closing process, the valve disc can adaptively adjust according to the shape of the valve body through the elastic pad to ensure uniform contact pressure on the sealing surface. Even in the presence of small particulate impurities in the medium, it can effectively prevent the formation of leakage channels. Attached Figure Description

[0015] Figure 1 This is an isometric view of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 for Figure 3 A magnified view of A above.

[0019] Legend:

[0020] 1. Handwheel; 2. Valve stem nut; 3. Valve stem; 4. T-bolt; 5. Packing gland; 6. Valve cover; 7. Valve body; 8. Packing; 9. Metal sealing ring; 10. Sealing ring; 11. Split ring; 12. Valve disc; 1201. Valve disc cover; 1202. Elastic pad; 13. Ultrasonic sensor. Detailed Implementation

[0021] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0024] Reference Figures 1-4 This utility model provides a gate valve with a sealing structure, including a handwheel 1, a valve stem nut 2 at the top of the handwheel 1, a valve stem 3 at the bottom of the valve stem nut 2, a thread at the top of the valve stem 3, and a threaded connection between the top of the valve stem 3 and the handwheel 1. T-bolts 4 are provided on both sides of the valve stem 3, a packing gland 5 is provided at the bottom of the valve stem 3, a valve cover 6 is provided at the bottom of the packing gland 5, a packing gland 5 is provided inside the valve cover 6, the valve cover 6 includes flanges connected by bolts, a valve body 7 is provided at the bottom of the valve cover 6, a connecting plate is provided on the outside of the valve stem 3, a T-bolt 4 is provided at the top of the connecting plate, the valve stem 3 passes through the interior of the valve body 7, packing 8 is provided inside the packing gland 5, a metal sealing ring 9 is provided on the outside of the valve cover 6, a sealing ring 10 is provided at the bottom of the metal sealing ring 9, and a metal sealing ring 9 and a sealing ring 10 are provided inside the valve cover 6. The sealing ring 10 is made of a high-performance elastic material, and the valve body 7 is made of a hard material. Made of hard alloy material, the valve body 7 has a valve stem 3 on the inner side of the metal sealing ring 9 and the inner side of the sealing ring 10. The bottom end of the valve stem 3 has a split ring 11, the bottom of the split ring 11 has a valve disc 12, the top of the valve disc 12 has a valve disc cover 1201, and the bottom of the valve disc 12 has an elastic pad 1202. The bottom of the valve body 7 has an ultrasonic sensor 13. The ultrasonic sensor 13 can be electrically connected to external equipment to detect whether there is leakage inside the valve body 7. The valve disc 12 is used. The valve body 7 is made of hard alloy material and is precision ground to have extremely low surface roughness. When it is in contact with the valve disc 12, it can form an excellent sealing surface. The valve disc 12 adopts an elastic deformation design. During the closing process, the valve disc 12 can adaptively adjust according to the shape inside the valve body 7 through the elastic pad 1202 to ensure uniform contact pressure on the sealing surface. Even in the presence of small particulate impurities in the medium, it can effectively prevent the formation of leakage channels. Specific Implementation Example 2:

[0026] Reference Figure 3The sealing surfaces of valve disc 12 and valve seat adopt a special combination of conical and spherical surfaces. The conical surface is machined on valve disc 12, and the spherical surface is located on valve seat. This structure allows the sealing surfaces of valve disc 12 to automatically adjust their fit during the closing process, reducing the sealing defects caused by machining errors or pipeline stress.

[0027] In summary:

[0028] 1. The use of metal sealing ring 9 and sealing ring 10 achieves dual sealing. The main seal relies on the high-performance elastic material sealing ring 10 to prevent media leakage, while the auxiliary seal relies on the metal sealing ring 9 to enhance sealing reliability.

[0029] 2. The valve disc 12 is used, and the valve body 7 is precision ground with hard alloy. The valve disc 12 adopts an elastic deformation design. The two work together to self-adjust, which can prevent the formation of leakage channels even if there are small particles of impurities, and ensure good sealing.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shut-off valve with a sealing structure, comprising a handwheel (1), characterized in that: The handwheel (1) is provided with a valve stem nut (2) at the top, a valve stem (3) is provided at the bottom of the valve stem nut (2), T-bolts (4) are provided on both sides of the valve stem (3), a packing gland (5) is provided at the bottom of the valve stem (3), a valve cover (6) is provided at the bottom of the packing gland (5), a valve body (7) is provided at the bottom of the valve cover (6), packing (8) is provided inside the packing gland (5), a metal sealing ring (9) is provided on the outside of the valve cover (6), a sealing ring (10) is provided at the bottom of the metal sealing ring (9), a split ring (11) is provided at the bottom of the valve stem (3), a valve disc (12) is provided at the bottom of the split ring (11), a valve disc cover (1201) is provided at the top of the valve disc (12), and an elastic pad (1202) is provided at the bottom of the valve disc (12).

2. A shut-off valve with a sealing structure according to claim 1, characterized in that: The valve stem (3) has a thread at the top, and the top of the valve stem (3) is connected to the handwheel (1) by the thread.

3. A shut-off valve with a sealing structure according to claim 2, characterized in that: A connecting plate is provided on the outside of the valve stem (3), and a T-bolt (4) is provided on the top of the connecting plate. The valve stem (3) passes through the inside of the valve body (7).

4. A shut-off valve with a sealing structure according to claim 1, characterized in that: The valve cover (6) is provided with a packing gland (5) on its inner side. The valve cover (6) includes flanges, which are connected to each other by bolts.

5. A shut-off valve with a sealing structure according to claim 1, characterized in that: The valve cover (6) is provided with a metal sealing ring (9) and a sealing ring (10) inside, and a valve stem (3) is provided on the inner side of the metal sealing ring (9) and the inner side of the sealing ring (10).

6. A shut-off valve with a sealing structure according to claim 1, characterized in that: An ultrasonic sensor (13) is provided at the bottom of the valve body (7).

7. A shut-off valve with a sealing structure according to claim 5, characterized in that: The sealing ring (10) is made of high-performance elastic material, and the valve body (7) is made of hard alloy material.

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