Flange cast steel straight-through stop valve

Abstract

The utility model provides a flange cast steel straight-through stop valve which comprises a valve body, a valve disc arranged on the inner side of the valve body, a valve cover arranged at the top of the valve body, a valve rod penetrating through the valve cover and connected with the valve disc, and a hand wheel arranged at the top of the valve rod. A lower mounting groove is formed in the valve body and located below the upper mounting groove, the outer diameter of the lower mounting groove is smaller than that of the upper mounting groove, a sealing ring is arranged in the lower mounting groove, and the sealing ring protrudes out of a groove opening of the lower mounting groove. The outer diameter of the sealing rubber plate is large, so that even if the sealing rubber plate and the sealing ring are deviated or dislocated, the gap between the valve disc and the valve body can still be effectively sealed, and then the stop valve is effectively closed.

Description

Technical Field

[0001] The utility model relates to a ship valve, in particular to a flange cast steel straight-through stop valve. Background Art

[0002] At present, a Chinese patent with announcement number CN209511123U discloses a stop valve, including a valve body, a valve disc arranged inside the valve body and matching the valve body, and a valve cover arranged outside the valve body and matching the valve body. A valve stem matching the valve disc and the valve cover is arranged inside the valve body, and a handwheel is installed on the upper part of the valve stem. The handwheel and the valve stem are connected by a valve stem nut. When it is necessary to control the above-mentioned stop valve to be closed, the operator can drive the valve stem to rotate clockwise through the handwheel, thereby driving the valve disc to move down and abut against the inner wall of the valve body. However, when the above-mentioned stop valve is in a closed state, only the sealing ring at the bottom of the valve disc is tightly abutted against the sealing ring inside the valve body. If there is an offset or misalignment between the two sealing rings, the above-mentioned stop valve cannot be effectively closed. Summary of the invention

[0003] In view of this, the utility model aims to provide a flange cast steel straight-through stop valve, which has the advantage of being able to be effectively closed.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a flange cast steel straight-through stop valve, comprising a valve body, a valve disc arranged inside the valve body, a valve cover arranged on the top of the valve body, a valve stem penetrating the valve cover and connected to the valve disc, and a handwheel arranged on the top of the valve stem, an upper mounting groove is provided at the bottom of the valve disc, a sealing rubber plate is provided in the upper mounting groove, and the sealing rubber plate protrudes from the notch of the upper mounting groove, a lower mounting groove is provided in the valve body, the lower mounting groove is located below the upper mounting groove, and the outer diameter of the lower mounting groove is smaller than the outer diameter of the upper mounting groove, a sealing ring is provided in the lower mounting groove, and the sealing ring protrudes from the notch of the lower mounting groove.

[0005] Through the above technical solution, the sealing rubber plate is installed in the upper mounting groove, and has a large contact area with the valve disc, which has the advantage of high connection stability. The sealing ring is installed in the lower mounting groove, and has a large contact area with the valve body, which has the advantage of high connection stability. When it is necessary to control the above-mentioned stop valve to close, the operator can drive the valve stem to rotate clockwise through the handwheel, thereby driving the valve disc to move down and abut against the inner wall of the valve body. At this time, the sealing rubber plate arranged at the bottom of the valve disc is tightly abutted against the sealing ring inside the valve body, thereby sealing the gap between the valve disc and the valve body. The outer diameter of the sealing rubber plate is large, so even if the sealing rubber plate and the sealing ring are offset or misaligned, the gap between the valve disc and the valve body can still be effectively sealed, thereby effectively closing the above-mentioned stop valve.

[0006] Preferably, a limiting ring groove is circumferentially provided at the side wall of the sealing rubber plate, and a plurality of limiting blocks are circumferentially arranged at the notch of the upper mounting groove, and the plurality of limiting blocks extend into the limiting ring groove, and the limiting blocks are tightly pressed against the inner wall of the limiting ring groove.

[0007] Through the above technical solution, a number of limit blocks and limit ring grooves cooperate with each other to limit the sealing rubber plate, thereby improving the connection strength between the sealing rubber plate and the valve disc.

[0008] Preferably, the limiting ring groove is flared, and the shape of the limiting block is adapted to the shape of the limiting ring groove.

[0009] Through the above technical solution, the limiting ring groove is expanded, and the shape of the limiting block is adapted to the shape of the limiting ring groove, so that the limiting block can be easily inserted into the limiting ring groove and used to limit the sealing rubber plate.

[0010] Preferably, a positioning protrusion is convexly provided at the center of the inner groove wall at the top of the upper installation groove, and a positioning groove is opened at the center of the top of the sealing rubber plate, and the positioning protrusion is embedded in the inner side of the positioning groove.

[0011] Through the above technical solution, the positioning protrusion and the positioning groove cooperate with each other to position the sealing rubber plate to ensure the accuracy of the sealing rubber plate during installation.

[0012] Preferably, the positioning protrusion is hemispherical, and the shape of the positioning groove is matched with the shape of the positioning protrusion.

[0013] Through the above technical solution, the positioning protrusion is hemispherical, and the shape of the positioning groove is matched with the shape of the positioning protrusion, so that the positioning protrusion can be embedded in the positioning groove more conveniently and is not easy to hinder the installation of the sealing rubber plate.

[0014] Preferably, a plurality of auxiliary annular grooves are provided at the bottom of the sealing rubber plate, and the plurality of auxiliary annular grooves are arranged concentrically, and an annular convex rib is provided at the top of the sealing ring opposite to the auxiliary annular groove, and the annular convex rib is inserted into the corresponding auxiliary annular groove.

[0015] Through the above technical solution, the annular rib is embedded in the auxiliary annular groove to form a bent gap, which can be used to further seal the gap between the valve disc and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment;

[0017] Figure 2 for Figure 1 Enlarged view of part A.

[0018] Figure numerals: 1. valve body; 2. valve disc; 3. valve cover; 4. valve stem; 5. hand wheel; 6. upper mounting groove; 7. sealing rubber plate; 8. lower mounting groove; 9. sealing ring; 10. limiting ring groove; 11. limiting block; 12. positioning protrusion; 13. positioning groove; 14. auxiliary ring groove; 15. annular convex rib. Implementation

[0019] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0020] A flange cast steel straight-through stop valve, such as Figure 1 , Figure 2 As shown, it includes a valve body 1, a valve disc 2 arranged inside the valve body 1, a valve cover 3 arranged on the top of the valve body 1, a valve stem 4 penetrating the valve cover 3 and connected to the valve disc 2, and a hand wheel 5 arranged on the top of the valve stem 4. When in use, the operator can drive the valve stem 4 to rotate through the hand wheel 5 to drive the valve disc 2 to move up and down, thereby controlling the opening and closing of the above-mentioned stop valve.

[0021] An upper mounting groove 6 is provided at the bottom of the valve disc 2, and a sealing rubber plate 7 is provided in the upper mounting groove 6, and the sealing rubber plate 7 protrudes from the notch of the upper mounting groove 6. A lower mounting groove 8 is provided in the valve body 1, and the lower mounting groove 8 is located below the upper mounting groove 6, and the outer diameter of the lower mounting groove 8 is smaller than the outer diameter of the upper mounting groove 6. A sealing ring 9 is provided in the lower mounting groove 8, and the sealing ring 9 protrudes from the notch of the lower mounting groove 8.

[0022] When the stop valve is in a closed state, the sealing rubber plate 7 at the bottom of the valve disc 2 is pressed against the sealing ring 9 inside the valve body 1 to seal the gap between the valve disc 2 and the valve body 1 and block the water flow.

[0023] A limiting ring groove 10 is provided along the circumferential direction at the side wall of the sealing rubber plate 7. A plurality of limiting blocks 11 are provided along the circumferential direction at the notch of the upper mounting groove 6, and the plurality of limiting blocks 11 extend into the limiting ring groove 10, and the limiting blocks 11 are tightly pressed against the inner wall of the limiting ring groove 10. In this embodiment, the limiting ring groove 10 is expanded, and the shape of the limiting blocks 11 is adapted to the shape of the limiting ring groove 10. The limiting blocks 11 cooperate with the limiting ring groove 10 to limit the sealing rubber plate 7, thereby improving the connection stability between the sealing rubber plate 7 and the valve disc 2.

[0024] A positioning protrusion 12 is convexly provided at the center of the inner groove wall at the top of the upper installation groove 6, and a positioning groove 13 is provided at the center of the top of the sealing rubber plate 7, and the positioning protrusion 12 is embedded in the inner side of the positioning groove 13. The positioning protrusion 12 is hemispherical, and the shape of the positioning groove 13 matches the shape of the positioning protrusion 12. The positioning protrusion 12 and the positioning groove 13 cooperate with each other, and can be used to position the sealing rubber plate 7, thereby improving the installation accuracy of the sealing rubber plate 7.

[0025] A plurality of auxiliary annular grooves 14 are provided at the bottom of the sealing rubber plate 7, and the auxiliary annular grooves 14 are arranged concentrically. An annular convex rib 15 is provided at the top of the sealing ring 9 opposite to the auxiliary annular groove 14, and the annular convex rib 15 is inserted into the corresponding auxiliary annular groove 14. The auxiliary annular groove 14 and the annular convex rib 15 cooperate with each other to form a curved gap, thereby further improving the sealing performance of the above-mentioned gate valve when it is closed.

[0026] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A flange cast steel straight-through stop valve, comprising a valve body (1), a valve disc (2) arranged inside the valve body (1), a valve cover (3) arranged on the top of the valve body (1), a valve stem (4) passing through the valve cover (3) and connected to the valve disc (2), and a hand wheel (5) arranged on the top of the valve stem (4), wherein: An upper mounting groove (6) is provided at the bottom of the valve disc (2), a sealing rubber plate (7) is provided in the upper mounting groove (6), and the sealing rubber plate (7) protrudes from the notch of the upper mounting groove (6); a lower mounting groove (8) is provided in the valve body (1), the lower mounting groove (8) is located below the upper mounting groove (6), and the outer diameter of the lower mounting groove (8) is smaller than the outer diameter of the upper mounting groove (6); a sealing ring (9) is provided in the lower mounting groove (8), and the sealing ring (9) protrudes from the notch of the lower mounting groove (8).

2. A flange cast steel straight stop valve according to claim 1, characterized in that: A limiting annular groove (10) is provided along the circumferential direction at the side wall of the sealing rubber plate (7), and a plurality of limiting blocks (11) are provided along the circumferential direction at the notch of the upper mounting groove (6). The plurality of limiting blocks (11) extend into the limiting annular groove (10), and the limiting blocks (11) are tightly pressed against the inner wall of the limiting annular groove (10).

3. A flange cast steel straight stop valve according to claim 2, characterized in that: The limiting ring groove (10) is arranged in a flared shape, and the shape of the limiting block (11) is adapted to the shape of the limiting ring groove (10).

4. A flange cast steel straight stop valve according to claim 1, characterized in that: A positioning protrusion (12) is provided at the center of the inner groove wall at the top of the upper installation groove (6), and a positioning groove (13) is provided at the center of the top of the sealing rubber plate (7), and the positioning protrusion (12) is embedded in the inner side of the positioning groove (13).

5. A flange cast steel straight stop valve according to claim 4, characterized in that: The positioning protrusion (12) is hemispherical, and the shape of the positioning groove (13) is adapted to the shape of the positioning protrusion (12).

6. The flange cast steel straight stop valve according to claim 1 is characterized in that: A plurality of auxiliary annular grooves (14) are provided at the bottom of the sealing rubber plate (7), and the plurality of auxiliary annular grooves (14) are arranged concentrically. An annular convex rib (15) is provided at the top of the sealing ring (9) opposite to the auxiliary annular groove (14), and the annular convex rib (15) is inserted into the corresponding auxiliary annular groove (14).

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