High-temperature-resistant and negative-pressure-resistant fluorine-lined ball valve

Abstract

The utility model relates to the technical field of fluorine-lined ball valves, in particular to a high-temperature-resistant and negative-pressure-resistant fluorine-lined ball valve which comprises a first valve body, the inner side wall of the first valve body is fixedly connected with a PTFE (polytetrafluoroethylene) valve seat, the top of a ball body is fixedly connected with a valve rod, and a first sealing ring is mounted at the inner bottom of a first mounting groove; a second mounting groove is formed in the mounting base, a second sealing ring is mounted at the inner bottom of the second mounting groove, a fixing frame is fixedly connected to the outer surface of the valve rod, a PTFE pressing sleeve is movably connected to the top of the fixing frame, and a third sealing ring is mounted at the inner top of an annular groove. According to the sealing device, the first sealing ring, the second sealing ring and the third sealing ring are arranged, the sealing performance of the device is improved, after the third sealing ring is abraded, the third sealing ring is tightly attached to the fixing frame by screwing down the second bolt, then replacement of the third sealing ring is reduced, and resource waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fluorine-lined ball valves, in particular to a high-temperature-resistant and negative-pressure-resistant fluorine-lined ball valve. Background Art

[0002] The fluorine-lined ball valve uses a sphere with a circular through hole as the opening and closing part. The ball rotates around the center line of the valve body with the valve stem to open and close the valve. Due to the needs of production and life, the existing fluorine-lined ball valve uses PTFE material, which makes it resistant to high temperature and negative pressure.

[0003] When the existing high-temperature resistant and negative-pressure resistant fluorine-lined ball valve is in use, the rotation of the external rotating rod causes the valve stem to wear the single-layer sealing ring, which in turn easily affects the sealing of the ball valve body. It needs to be replaced regularly, resulting in a waste of resources. Therefore, a high-temperature resistant and negative-pressure resistant fluorine-lined ball valve is needed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high temperature resistant and negative pressure resistant fluorine lined ball valve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high temperature resistant and negative pressure resistant fluorine lined ball valve, comprising a first valve body, the inner side wall of the first valve body is fixedly connected to a PTFE valve seat, the inner side wall of the first valve body is rotatably connected to a ball, and the ball fits the inner side wall of the PTFE valve seat, the top of the ball is fixedly connected to a valve stem, the outer surface of the valve stem is fixedly connected to a fixing ring, the top of the first valve body is provided with a first mounting groove, the inner bottom of the first mounting groove is provided with a first sealing ring, and the fixing ring fits the top of the first sealing ring;

[0006] A mounting seat is fixedly connected to the top of the first valve body, a second mounting groove is provided inside the mounting seat, a second sealing ring is installed at the inner bottom of the second mounting groove, a fixing frame is fixedly connected to the outer surface of the valve stem, and the bottom of the fixing frame fits with the top of the second sealing ring, a PTFE pressing sleeve is movably connected to the top of the fixing frame, an annular groove is provided at the bottom of the PTFE pressing sleeve, a third sealing ring is installed at the inner top of the annular groove, and the top of the fixing frame fits with the bottom of the third sealing ring.

[0007] Furthermore: a connecting frame is fixedly connected to the side surface of the mounting seat, and the PTFE pressing sleeve is fixedly connected to the connecting frame via a second bolt.

[0008] Furthermore: a support ring is fixedly connected to the outer surface of the valve stem, a rotating rod is clamped on the top of the valve stem, and the rotating rod is fitted with the top of the support ring.

[0009] Further: the outer surface of the first valve body is fixedly connected with a first fixing seat, and the internal thread of the first fixing seat is connected with a first bolt.

[0010] Furthermore: the outer surface of the first bolt is movably connected to a second fixing seat, the inner side wall of the second fixing seat is fixedly connected to a second valve body, and the second valve body fits the side surface of the first valve body.

[0011] Furthermore: the valve stem is rotatably connected to the inside of the first valve body, and the top of the valve stem is hexagonal.

[0012] The utility model has the following beneficial effects:

[0013] Compared with the prior art, the first sealing ring, the second sealing ring and the third sealing ring are provided, the valve stem is used to drive the fixing ring to fit with the first sealing ring, the bottom of the fixing frame is used to squeeze the second sealing ring, and then the top of the fixing frame is used to squeeze the third sealing ring, which is beneficial to improving the sealing performance of the device, and when the second sealing ring is worn by the valve stem, the third sealing ring is tightly fitted with the fixing frame by tightening the second bolt, thereby reducing the replacement of the second sealing ring and avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle.

[0017] Legend:

[0018] 1. First valve body; 2. Second valve body; 3. First fixed seat; 4. Second fixed seat; 5. First bolt; 6. PTFE valve seat; 7. Ball; 8. Valve stem; 9. First mounting groove; 10. First sealing ring; 11. Fixed ring; 12. Mounting seat; 13. Second mounting groove; 14. Second sealing ring; 15. Fixed frame; 16. Connecting frame; 17. PTFE pressing sleeve; 18. Annular groove; 19. Third sealing ring; 20. Second bolt; 21. Support ring; 22. Rotating rod. DETAILED DESCRIPTION

[0019] Reference Figure 1-3The utility model provides a high temperature resistant and negative pressure resistant fluorine lined ball valve: comprising a first valve body 1, the inner side wall of the first valve body 1 is fixedly connected with a PTFE valve seat 6, the inner side wall of the first valve body 1 is rotatably connected with a ball 7, and the ball 7 fits with the inner side wall of the PTFE valve seat 6, the top of the ball 7 is fixedly connected with a valve stem 8, the outer surface of the valve stem 8 is fixedly connected with a fixing ring 11, the top of the first valve body 1 is provided with a first mounting groove 9, the inner bottom of the first mounting groove 9 is installed with a first sealing ring 10, and the fixing ring 11 fits with the top of the first sealing ring 10;

[0020] A mounting seat 12 is fixedly connected to the top of the first valve body 1, a second mounting groove 13 is provided inside the mounting seat 12, a second sealing ring 14 is installed at the inner bottom of the second mounting groove 13, a fixing frame 15 is fixedly connected to the outer surface of the valve stem 8, and the bottom of the fixing frame 15 fits with the top of the second sealing ring 14, a PTFE pressing sleeve 17 is movably connected to the top of the fixing frame 15, an annular groove 18 is provided at the bottom of the PTFE pressing sleeve 17, a third sealing ring 19 is installed at the inner top of the annular groove 18, and the top of the fixing frame 15 fits with the bottom of the third sealing ring 19. The valve stem 8 is used to drive the fixing ring 11 to fit with the first sealing ring 10, the bottom of the fixing frame 15 is used to squeeze the second sealing ring 14, and then the top of the fixing frame 15 is used to squeeze the third sealing ring 19, which is beneficial to improving the sealing performance of the device. When the third sealing ring 19 is worn, the third sealing ring 19 is tightly fitted with the fixing frame 15 by tightening the second bolt 20, thereby reducing the replacement of the third sealing ring 19 and avoiding waste of resources.

[0021] The side surface of the mounting seat 12 is fixedly connected with a connecting frame 16, and the PTFE compression sleeve 17 is fixedly connected to the connecting frame 16 by a second bolt 20. The PTFE compression sleeve 17 and the PTFE valve seat 6 are used to enhance the high temperature resistance and negative pressure resistance of the device.

[0022] The outer surface of the valve stem 8 is fixedly connected with a support ring 21, and the top of the valve stem 8 is clamped with a rotating rod 22, and the rotating rod 22 fits with the top of the support ring 21. The rotating rod 22 drives the valve stem 8 to rotate, and the ball 7 rotates to open and close the ball valve.

[0023] The outer surface of the first valve body 1 is fixedly connected with a first fixing seat 3, and the inner thread of the first fixing seat 3 is connected with a first bolt 5. The first bolt 5 is used to connect the second valve body 2 to the first valve body 1.

[0024] The outer surface of the first bolt 5 is movably connected to the second fixing seat 4 , the inner side wall of the second fixing seat 4 is fixedly connected to the second valve body 2 , and the second valve body 2 fits the side surface of the first valve body 1 .

[0025] The valve stem 8 is rotatably connected to the interior of the first valve body 1, and the top of the valve stem 8 is hexagonal.

[0026] Working principle: When in use, the valve stem 8 is used to drive the fixing ring 11 to fit with the first sealing ring 10, the bottom of the fixing frame 15 is used to squeeze the second sealing ring 14, and then the top of the fixing frame 15 is used to squeeze the third sealing ring 19, which is beneficial to improve the sealing performance of the device, and when the third sealing ring 19 is worn, the second bolt 20 is tightened to make the third sealing ring 19 fit closely with the fixing frame 15, thereby reducing the replacement of the third sealing ring 19 and avoiding waste of resources.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant and negative pressure resistant fluorine lined ball valve, comprising a first valve body (1), characterized in that: The inner side wall of the first valve body (1) is fixedly connected to a PTFE valve seat (6), the inner side wall of the first valve body (1) is rotatably connected to a ball (7), and the ball (7) fits against the inner side wall of the PTFE valve seat (6), the top of the ball (7) is fixedly connected to a valve stem (8), the outer surface of the valve stem (8) is fixedly connected to a fixing ring (11), the top of the first valve body (1) is provided with a first mounting groove (9), the inner bottom of the first mounting groove (9) is provided with a first sealing ring (10), and the fixing ring (11) fits against the top of the first sealing ring (10); The top of the first valve body (1) is fixedly connected to a mounting seat (12), a second mounting groove (13) is provided inside the mounting seat (12), a second sealing ring (14) is installed at the inner bottom of the second mounting groove (13), a fixing frame (15) is fixedly connected to the outer surface of the valve stem (8), and the bottom of the fixing frame (15) is in contact with the top of the second sealing ring (14), the top of the fixing frame (15) is movably connected to a PTFE pressing sleeve (17), the bottom of the PTFE pressing sleeve (17) is provided with an annular groove (18), a third sealing ring (19) is installed at the inner top of the annular groove (18), and the top of the fixing frame (15) is in contact with the bottom of the third sealing ring (19).

2. A high temperature resistant and negative pressure resistant fluorine lined ball valve according to claim 1, characterized in that: A connecting frame (16) is fixedly connected to the side surface of the mounting seat (12), and the PTFE pressing sleeve (17) is fixedly connected to the connecting frame (16) via a second bolt (20).

3. According to claim 1, a high temperature resistant and negative pressure resistant fluorine lined ball valve is characterized by: A support ring (21) is fixedly connected to the outer surface of the valve stem (8), a rotating rod (22) is clamped on the top of the valve stem (8), and the rotating rod (22) fits against the top of the support ring (21).

4. A high temperature resistant and negative pressure resistant fluorine lined ball valve according to claim 1, characterized in that: The outer surface of the first valve body (1) is fixedly connected to a first fixing seat (3), and the interior of the first fixing seat (3) is threadedly connected to a first bolt (5).

5. A high temperature resistant and negative pressure resistant fluorine lined ball valve according to claim 4, characterized in that: The outer surface of the first bolt (5) is movably connected to a second fixing seat (4), the inner side wall of the second fixing seat (4) is fixedly connected to a second valve body (2), and the second valve body (2) is in contact with the side surface of the first valve body (1).

6. A high temperature resistant and negative pressure resistant fluorine lined ball valve according to claim 1, characterized in that: The valve stem (8) is rotatably connected to the interior of the first valve body (1), and the top of the valve stem (8) is hexagonal.

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