Hard sealing high pressure ball valve

Abstract

This utility model relates to the field of valve technology, and in particular to a hard-seal high-pressure ball valve, comprising a valve body, a valve cover disposed on the valve body, a valve stem rotatably disposed on the valve cover with one end outside the valve body and the other end inside the valve body, a valve ball disposed in the valve body and engaged with the valve stem, a fluid passage opened on the valve ball, a valve cap disposed on the valve body for positioning the valve ball, and a valve seat disposed between the valve ball and the valve cap. The valve seat is further provided with a scraping device for scraping off impurities adhering to the valve ball.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a hard-seal high-pressure ball valve. Background Technology

[0002] Ball valves are a type of valve with a wide range of applications, including petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceutical industry, water conservancy, power industry, municipal industry, and steel industry. Their plug body is a ball with a channel, and they are widely used in high-pressure environments. However, some high-pressure environments may contain viscous substances, which can easily cause particles and other impurities to cover the valve ball. When the valve ball is closed, it will rub against the valve seat, accelerate wear, and greatly affect the service life of the valve. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a hard-seal high-pressure ball valve.

[0004] To achieve the above objectives, the present invention provides a hard-seal high-pressure ball valve, comprising a valve body, a valve cover disposed on the valve body, a valve stem rotatably disposed on the valve cover with one end outside the valve body and the other end inside the valve body, a valve ball disposed inside the valve body and engaged with the valve stem, a fluid passage opened on the valve ball, a valve cap disposed on the valve body for positioning the valve ball, and a valve seat disposed between the valve ball and the valve cap. The valve seat is further provided with a scraping device for scraping off impurities adhering to the valve ball.

[0005] A further improvement is that the scraping device includes: an annular protrusion on the valve seat and an oblique angle formed on the annular protrusion, the annular protrusion abutting against the surface of the valve ball to scrape away impurities.

[0006] A further improvement is that a flexible quick-release device is provided between the annular protrusion and the valve seat.

[0007] A further improvement is that the elastic quick-release device includes: an annular mounting groove formed on the valve seat, an elastic ring disposed at the bottom of the annular mounting groove, and the annular protrusion is disposed in the annular mounting groove with its bottom abutting against the elastic ring.

[0008] A further improvement is that the valve cap has several mounting holes, and a spring is installed in each mounting hole, with one end of the spring abutting against the valve seat and the other end abutting against the bottom of the mounting hole.

[0009] A further improvement is that a sliding block is provided on the valve seat, and a sliding groove matching the sliding block is provided on the valve cap to enhance sliding stability and concentricity.

[0010] A further improvement is that the bottom of the valve body is also equipped with a draining device to facilitate drainage and enhance the stability of the valve ball rotation.

[0011] A further improvement is that the sewage discharge device includes: a sewage discharge block located at the bottom of the valve body, a sewage discharge channel opened on the sewage discharge block, a plugging screw locked on the sewage discharge block for sealing the sewage discharge channel, and a rotating device is also provided on the sewage discharge block.

[0012] A further improvement is that the rotating device includes a positioning rod mounted on the sewage block, a rotating bearing mounted on the positioning rod, and a rotating hole on the valve ball that matches the rotating bearing.

[0013] A further improvement is that an installation device for improving concentricity is provided between the valve cap and the valve body.

[0014] A further improvement is that the installation device includes: positioning ring blocks disposed on the left and right sides of the valve body, positioning ring grooves opened on the valve cap to match the positioning ring blocks, and a positioning ring platform inserted into the valve body on the valve cap.

[0015] A further improvement is that a handle is provided on the valve stem.

[0016] A further improvement is that the valve stem is provided with a locking block that can rotate with the valve stem, the valve cover is provided with a first locking threaded hole, and the locking block is provided with a second locking threaded hole.

[0017] A further improvement is that a connecting flange is also provided on the valve cap.

[0018] The advantages and beneficial effects of this utility model are as follows: 1. Simple structure and easy to use. It is equipped with a scraping device to prevent a large amount of impurities from directly contacting the sealing area between the valve ball and the valve seat, thus preventing wear on the sealing area and improving service life. It is also equipped with springs and elastic rings to ensure that the valve seat and the annular protrusion maintain contact with the valve ball for a long time, reducing wear and improving service life.

[0019] 2. Equipped with a drain device, which can improve the rotational stability of the valve ball and, in conjunction with the scraping device, promptly clean impurities from the valve body, prevent impurity accumulation, and improve ease of use.

[0020] 3. The ball valve has a split structure and is equipped with an installation device, sliding block, and sliding groove, which greatly improves the ease of installation and concentricity of the ball valve, making it more suitable for high-pressure environments. Attached Figure Description

[0021] Figure 1 This is a front sectional view of a hard-seal high-pressure ball valve according to the present invention; Figure 2 This is an enlarged schematic diagram of part A of a hard-seal high-pressure ball valve according to the present invention; In the diagram: 101, Valve body; 102, Valve cover; 103, Valve stem; 104, Valve ball; 105, Fluid passage; 106, Valve cap; 107, Valve seat; 108, Annular protrusion; 109, Bevel; 110, Annular mounting groove; 111, Elastic ring; 112, Mounting hole; 113, Spring; 114, Sliding block; 115, Sliding groove; 116, Drain block; 117, Drain passage; 118, Plug screw; 119, Positioning rod; 120, Rotary bearing; 121, Rotary hole; 122, Positioning ring block; 123, Positioning ring groove; 124, Washer; 125, Handle; 126, Locking block; 127, First locking threaded hole; 128, Second locking threaded hole; 129, Connecting flange. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0023] like Figures 1-2 As shown, a hard-seal high-pressure ball valve includes a valve body 101, a valve cover 102 disposed on the valve body 101, a valve stem 103 rotatably disposed on the valve cover 102 with one end located outside the valve body 101 and the other end located inside the valve body 101, a valve ball 104 disposed inside the valve body 101 and engaged with the valve stem 103, a fluid passage 105 opened on the valve ball 104, a valve cap 106 disposed on the valve body 101 for positioning the valve ball 104, and a valve seat 107 disposed between the valve ball 104 and the valve cap 106. The valve seat 107 is also provided with a scraping device for scraping off impurities adhering to the valve ball 104. The valve cap 106 is locked onto the valve body 101 by a screw and nut.

[0024] In order to scrape away impurities adhering to the valve ball 104 when the valve is closed, thereby reducing wear between the valve seat 107 and the valve ball 104 and improving service life, the scraping device includes: an annular protrusion 108 disposed on the valve seat 107 and a chamfer 109 formed on the annular protrusion 108, wherein the annular protrusion 108 abuts against the surface of the valve ball 104 to scrape away impurities.

[0025] To reduce processing difficulty and prevent the annular protrusion from damaging the valve ball 104, an elastic quick-release device is provided between the annular protrusion 108 and the valve seat 107. The elastic quick-release device includes: an annular mounting groove 110 opened on the valve seat 107 and an elastic ring 111 set at the bottom of the annular mounting groove 110. The annular protrusion 108 is set in the annular mounting groove 110 and its bottom abuts against the elastic ring 111. The elastic ring 111 is a rubber elastic ring 111.

[0026] In order to improve the sealing performance between the valve seat 107 and the valve ball 104, reduce friction, reduce wear, and improve service life, the valve cap 106 is provided with a number of mounting holes 112. A spring 113 is provided in the mounting hole 112, with one end of the spring 113 abutting against the valve seat 107 and the other end abutting against the bottom of the mounting hole 112.

[0027] To improve the stability of the valve seat 107 during movement, a sliding block 114 is provided on the valve seat 107, and a sliding groove 115 matching the sliding block 114 is provided on the valve cap 106 to enhance sliding stability and concentricity. A rubber sealing ring is also provided on the sliding block 114.

[0028] To facilitate the cleaning of scraped-off impurities and other debris, the bottom of the valve body 101 is also provided with a sewage discharge device to facilitate sewage discharge and enhance the rotational stability of the valve ball 104. The sewage discharge device includes: a sewage discharge block 116 at the bottom of the valve body 101, a sewage discharge channel 117 opened on the sewage discharge block 116, and a plugging screw 118 locked on the sewage discharge block 116 to seal the sewage discharge channel 117. The sewage discharge block 116 is also provided with a rotating device. The sewage discharge channel 117 is a T-shaped channel, with two inlets for impurities to enter located inside the valve body 101.

[0029] To improve the rotational stability of the valve ball 104, the rotation device includes: a positioning rod 119 disposed on the drain block 116, a rotating bearing 120 disposed on the positioning rod 119, and a rotation hole 121 on the valve ball 104 that matches the rotating bearing 120.

[0030] To facilitate the installation of the valve cap 106 and improve concentricity, an installation device for improving concentricity is provided between the valve cap 106 and the valve body 101. The installation device includes: positioning ring blocks 122 provided on the left and right sides of the valve body 101, and positioning ring grooves 123 provided on the valve cap 106 that match the positioning ring blocks 122. The valve cap 106 is also provided with a positioning ring platform that is inserted into the valve body 101. A washer 124 is also provided between the positioning ring groove 123 and the positioning ring block 122; A rubber sealing ring is also provided on the positioning ring platform.

[0031] To facilitate the rotation of the valve stem 103, a handle 125 is provided on the valve stem 103.

[0032] To prevent the ball valve from being rotated by unauthorized personnel after it has been rotated to its position, a locking block 126 that can rotate with the valve stem 103 is provided on the valve stem 103, a first locking threaded hole 127 is provided on the valve cover 102, and a second locking threaded hole 128 is provided on the locking block 126.

[0033] To facilitate the installation of the ball valve on the pipeline, a connecting flange 129 is also provided on the valve cap 106.

[0034] Working principle: During assembly, first place the elastic ring 111 in the annular mounting groove 110, then place the annular protrusion in the annular mounting groove 110 so that it abuts against the elastic ring 111. Then place the valve seat 107 on the valve cap 106. At this time, the positioning ring block 122 and the positioning ring groove 123 can be aligned. Place the valve cap 106 on the valve body 101, align the threaded holes, and then fix it on the valve body 101 with the screw and nut to complete the assembly. In use, rotating the valve stem 103 controls the rotation of the valve ball 104. When the fluid passage 105 corresponds to the valve cap 106 and the valve seat 107, fluid can flow. When closed, rotating the valve stem 103 causes the valve ball 104 to rotate, so that the fluid passage 105 is outside the valve seat 107. The valve ball 104 cooperates with the valve seat 107 to complete the seal. At this time, the fluid directly contacts the valve ball 104. If the fluid contains impurities, they are likely to adhere to the valve ball 104. When the user wants to open the ball valve again, the annular protrusion will first contact the impurities, thereby scraping off some of the impurities. This prevents these impurities from directly contacting the contact area between the valve seat 107 and the valve ball 104, thus accelerating the wear rate and improving the service life. Some of the scraped-off impurities will be washed away by the fluid, and some will fall to the vicinity of the drain pipe after repeated opening and closing. At this time, the user can open the plugging screw 118 for cleaning, improving the convenience of use and service life.

[0035] 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 above are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A hard-seal high-pressure ball valve, comprising a valve body, a valve cover disposed on the valve body, a valve stem rotatably disposed on the valve cover with one end outside the valve body and the other end inside the valve body, a valve ball disposed inside the valve body and engaged with the valve stem, a fluid passage formed on the valve ball, a valve cap disposed on the valve body for positioning the valve ball, and a valve seat disposed between the valve ball and the valve cap, characterized in that: The valve seat is also equipped with a scraping device for scraping off impurities adhering to the valve ball.

2. The hard-seal high-pressure ball valve according to claim 1, characterized in that: The scraping device includes: an annular protrusion on the valve seat and an oblique angle formed on the annular protrusion, wherein the annular protrusion abuts against the surface of the valve ball to scrape away impurities.

3. A hard-seal high-pressure ball valve according to claim 2, characterized in that: A flexible quick-release device is also provided between the annular protrusion and the valve seat.

4. A hard-seal high-pressure ball valve according to claim 3, characterized in that: The elastic quick-release device includes: an annular mounting groove formed on the valve seat, an elastic ring disposed at the bottom of the annular mounting groove, and an annular protrusion disposed in the annular mounting groove with its bottom abutting against the elastic ring.

5. A hard-seal high-pressure ball valve according to claim 1, characterized in that: The valve cap has several mounting holes, and a spring is installed in each mounting hole. One end of the spring abuts against the valve seat and the other end abuts against the bottom of the mounting hole.

6. A hard-seal high-pressure ball valve according to claim 5, characterized in that: The valve seat is also provided with a sliding block, and the valve cap is provided with a sliding groove that matches the sliding block to enhance sliding stability and concentricity.

7. A hard-seal high-pressure ball valve according to claim 1, characterized in that: The bottom of the valve body is also equipped with a draining device to facilitate drainage and enhance the stability of the valve ball rotation.

8. A hard-seal high-pressure ball valve according to claim 7, characterized in that: The sewage discharge device includes: a sewage discharge block located at the bottom of the valve body, a sewage discharge channel opened on the sewage discharge block, and a plugging screw locked on the sewage discharge block to seal the sewage discharge channel. The sewage discharge block is also equipped with a rotating device.

9. A hard-seal high-pressure ball valve according to claim 8, characterized in that: The rotating device includes: a positioning rod disposed on the sewage block, a rotating bearing disposed on the positioning rod, and a rotating hole on the valve ball that matches the rotating bearing.

10. A hard-seal high-pressure ball valve according to claim 1, characterized in that: An installation device for improving concentricity is also provided between the valve cap and the valve body.

11. A hard-seal high-pressure ball valve according to claim 10, characterized in that: The installation device includes: positioning ring blocks disposed on the left and right sides of the valve body, positioning ring grooves on the valve cap that match the positioning ring blocks, and a positioning ring platform inserted into the valve body on the valve cap.

12. A hard-seal high-pressure ball valve according to claim 1, characterized in that: The valve stem is equipped with a handle.

13. A hard-seal high-pressure ball valve according to claim 1, characterized in that: The valve stem is provided with a locking block that can rotate with the valve stem, the valve cover is provided with a first locking threaded hole, and the locking block is provided with a second locking threaded hole.

14. A hard-seal high-pressure ball valve according to claim 1, characterized in that: The valve cap is also equipped with a connecting flange.

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