An integrated jacketed ball valve

Abstract

The present invention relates to the technical field of ball valves, and specifically to an integrated jacketed ball valve, which is used to solve the problems of poor sealing effect of the end cover and great difficulty in assembling the end cover in the existing integrated jacketed ball valve. The present invention includes a valve body, an end cover and a valve ball are installed in the valve body, a sealing pressure ring and a support ring are also installed in the valve body, a valve seat is installed in the support ring, and a seal is installed between the support ring and the sealing pressure ring; a clamping groove is provided in the valve body, an outer ring is integrally formed on the outer surface of the end cover, the outer ring can be clamped into the clamping groove, a plurality of fastening holes are evenly provided on the end cover, and a fastener that can contact the sealing pressure ring is installed in the fastening hole. In the present invention, the end cover can be installed by clamping the outer ring in the clamping groove, thereby making the end cover easier to install; the degree of compression of the seal can be adjusted by adjusting the fastener, thereby making the sealing effect of the end cover better.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and more particularly to an integrated jacketed ball valve. Background Art

[0002] Jacketed ball valves are widely used in various systems such as petroleum, chemical, metallurgy, pharmaceutical, and food to transport high-viscosity media that will solidify or crystallize at room temperature. Jacketed ball valves are welded with a metal jacket on the basis of ball valves, which are used to inject steam or other heat-insulating or cold-insulating media to ensure that the media in the valve can work normally. Jacketed ball valves are also called heat-insulating ball valves. Jacketed ball valves have good heat-insulating and cold-insulating properties. The valve diameter is consistent with the pipe diameter, and it can effectively reduce the heat loss of the medium in the pipeline. When ordinary ball valves transport high-viscosity media that will solidify or crystallize at room temperature, the medium will not be able to move due to the lack of heat-insulating effect of the valve. When the flow stops, it will solidify in the valve body cavity and flow channel, causing the valve to become blocked and fail. In order to solve this problem, a metal jacket is welded on the basis of the conventional ball valve to inject steam or other heat-insulating or cold-insulating media to ensure that the medium in the valve does not solidify or crystallize, thereby keeping the pipeline in normal operation. Jacketed ball valves are divided into one-piece jacketed ball valves and two-piece jacketed ball valves according to the different structures of the ball valves. Among them, the two-piece jacketed ball valve has a worse thermal insulation effect than the one-piece jacketed ball valve because the connection between the valve body and the left body is not wrapped by the jacket. If this structure is used, it needs to be confirmed by the user before it can be adopted.

[0003] The structure of the integrated jacketed ball valve end cover in the prior art is as follows: the end cover outer circle is processed with a thread that cooperates with the internal thread of the valve body end, and the end sealing effect is achieved by screwing and pressing the gasket. The disadvantages of this structure are: first, the pressing force is difficult to control, and insufficient or excessive pressing force often occurs, causing the valve to be repeatedly disassembled and assembled, resulting in thread damage, which is not conducive to the mass production of the valve; second, this structure is only suitable for small-diameter valves. Large-diameter valves using this structure are extremely difficult to assemble and inconvenient to operate.

[0004] Another structure is: drill hexagon socket screw countersunk holes in the end cover, drill threaded holes in the corresponding positions of the valve body, use hexagon socket screws to connect the end cover and the valve body, sandwich a gasket in the middle, and directly tighten the sealing gasket through the end cover. This structure needs to consider whether there is enough space for drilling threaded holes in the valve body, whether the outer circle of the end cover will affect the sealing surface of the end flange, etc. Therefore, it is not very universal and can only be used when the end flange is much larger than the valve diameter.

[0005] In summary, the existing integrated jacketed ball valve has the problem of poor sealing effect of the end cover and great difficulty in assembling the end cover. Therefore, we urgently need an integrated jacketed ball valve with better sealing performance of the end cover and less difficulty in assembling the end cover. Summary of the Invention

[0006] To address the above issues, the present invention provides an integrated jacketed ball valve to address the existing problems of poor end cap sealing and difficulty in assembling the end cap. The present invention facilitates installation by simply snapping the end cap into the clamping groove via an outer ring. Adjusting the fasteners adjusts the degree of compression applied to the seal, resulting in a better sealing effect.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] An integrated jacketed ball valve comprises a valve body, an end cover and a valve ball are installed in the valve body, a sealing pressure ring and a support ring are also installed in the valve body, a valve seat is installed in the support ring, and a seal is installed between the support ring and the sealing pressure ring; a clamping groove is opened in the valve body, an outer ring is integrally formed on the outer surface of the end cover, and the outer ring can be clamped into the clamping groove, and a plurality of fastening holes are evenly opened on the end cover, and fasteners that can contact the sealing pressure ring are installed in the fastening holes.

[0009] Preferably, the end cover comprises a plurality of independent end face blocks, each of the end face blocks is provided with a fastening hole, and an outer ring is integrally formed on the outer surface of each of the end face blocks.

[0010] Preferably, the fastener is a hexagon socket screw, and the sealing member is a gasket.

[0011] Preferably, a limiting step is integrally formed on the inner wall of the valve body, and a limiting protrusion is integrally formed on the outer surface of the support ring, and the limiting protrusion can contact the limiting step.

[0012] Preferably, a plurality of spring holes are opened in the support ring, and springs in contact with the valve seat are installed in the spring holes.

[0013] Preferably, an O-ring and braided graphite are installed between the valve seat and the support ring.

[0014] Preferably, a lower valve stem passing through the valve body is mounted on one end of the valve ball via a bearing, a channel communicating with the valve body is opened in the lower valve stem, and a screw plug is installed in the channel.

[0015] Preferably, the valve body and the lower valve stem are connected via a stud, a nut is installed on the stud, and a winding gasket is also installed between the valve body and the lower valve stem.

[0016] Preferably, the other end of the valve ball is equipped with an upper valve stem passing through the valve body, a stuffing box is installed between the upper valve stem and the valve body, packing and a pressure ring are installed between the stuffing box and the upper valve stem from bottom to top, and a pressure cover is also installed on the upper end of the pressure ring, and the pressure cover and the stuffing box are connected by bolts.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) In the present invention, the end cover can be installed by being clamped in the clamping groove through the outer ring, without the need for turning non-standard threads, thereby making the end cover easier to install, with lower processing costs and simpler processing; the degree of compression of the seal can be adjusted by adjusting the fastener, thereby achieving a better sealing effect of the end cover.

[0019] (2) The end cover of the present invention includes multiple independent end face blocks. The dividing line gap of the end cover can be made relatively large. The outer rings of the multiple divided end face blocks are respectively inserted into the snap-fit grooves from the inside to the outside, which makes installation easier.

[0020] (3) In the present invention, a limiting step is integrally formed on the inner wall of the valve body, and a limiting protrusion is integrally formed on the outer surface of the support ring. The limiting protrusion can contact the limiting step. When the support ring is installed in the valve body, the limiting protrusion will contact the limiting step, so that the support ring can no longer move toward the inside of the valve body, thereby better limiting the position of the support ring.

[0021] (4) In the present invention, by installing a spiral wound gasket between the valve body and the lower valve stem, the sealing between the valve body and the lower valve stem can be improved. By installing a stuffing box between the upper valve stem and the valve body, and installing packing and a pressure ring between the stuffing box and the upper valve stem from bottom to top, the sealing between the lower valve stem and the valve body can be improved, thereby improving the sealing of the entire ball valve.

[0022] (5) The ball valve of the present invention has a strong structural versatility and can be used regardless of valve caliber. Gaskets made of graphite, PTFE or O-rings can be used, and the sealing effect is excellent. There is no restriction on the valve caliber.

[0023] (6) The present invention facilitates adjustment of the sealing effect of the gasket. The tighter the hexagon socket screw is screwed, the greater the pressing force on the sealing ring will be, which will press the gasket tighter and improve the sealing effect of the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front cross-sectional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the partial structure of the valve body of the present invention;

[0026] Figure 3 A schematic side view of the end cap of the present invention;

[0027] Figure 4 This is a front cross-sectional structural diagram of the end cover of the present invention;

[0028] Figure 5This is a front cross-sectional partial structural diagram of the connection between the support ring, sealing pressure ring, end cover, etc. of the present invention;

[0029] Figure 6 This is a front cross-sectional structural diagram of the support ring of the present invention;

[0030] Figure numerals: 1 lower valve stem, 101 channel, 2 screw plug, 3 spiral wound gasket, 4 stud, 5 nut, 6 valve body, 61 snap-fit groove, 62 limiting step, 7 hexagon socket screw, 8 end cover, 81 end face block, 811 fastening hole, 812 outer ring, 9 sealing pressure ring, 10 sealing, 11 support ring, 111 limiting protrusion, 112 spring hole, 12 braided graphite, 13 O-ring, 14 valve ball, 15 bearing, 16 valve seat, 17 spring, 18 packing, 19 upper valve stem, 20 pressure ring, 21 stuffing box, 22 bolts, 23 pressure cover. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the following embodiments.

[0032] Example 1:

[0033] like Figure 1-6 As shown, an integrated jacketed ball valve includes a valve body 6, an end cover 8 and a valve ball 14 are installed in the valve body 6, a sealing pressure ring 9 and a support ring 11 are also installed in the valve body 6, a valve seat 16 is installed in the support ring 11, and a seal 10 is installed between the support ring 11 and the sealing pressure ring 9; a clamping groove 61 is opened in the valve body 6, and an outer ring 812 is integrally formed on the outer surface of the end cover 8, and the outer ring 812 can be clamped into the clamping groove 61, and a plurality of fastening holes 811 are evenly opened on the end cover 8, and fasteners that can contact the sealing pressure ring 9 are installed in the fastening holes 811.

[0034] Preferably, the fastener is a hexagon socket screw 7, the seal 10 is a gasket, an O-ring 13 and a braided graphite 12 are installed between the valve seat 16 and the support ring 11, a plurality of spring holes 112 are opened in the support ring 11, and a spring 17 in contact with the valve seat 16 is installed in the spring hole 112. The fastener is a hexagon socket screw 7, and the seal 10 is a gasket. The tightening force of the gasket is relatively convenient to adjust. It is only necessary to move the hexagon socket screw 7 with a standard wrench, and no special tools are required.

[0035] Working principle: The spring 17 is installed at the bottom of the seat hole on the left side of the center line of the valve body 6, and the spring 17 is in contact with the valve seat 16. The O-ring 13 and the braided graphite 12 are put on the valve seat 16 on the left side, and installed in the seat hole on the left side of the center line of the valve body 6. The valve ball 14 is rotated from the right side of the valve body 6 and contacts the valve seat 16. The spring 17 is installed in the spring hole 112 of the support ring 11. The O-ring 13 and the braided graphite 12 are put into the valve seat 16 on the right side, and installed in the support ring 11. The support ring 11 is installed from the right side of the valve body 6 and contacts the valve ball 14. Then, the gaskets are installed from the right side of the valve body 6 respectively. Then install the sealing pressure ring 9, install the end cover 8 into the valve body 6, and pass the hexagon socket screw 7 through the fastening hole 811, tighten the hexagon socket screw 7 and make the hexagon socket screw 7 contact with the sealing pressure ring 9. The tighter the hexagon socket screw 7 is screwed, the greater the pressing force on the sealing pressure ring 9 will be, and the gasket will be pressed tighter, thereby improving the sealing and sealing effect of the ball valve. At the same time, the end cover 8 is clamped in the clamping groove 61 through the outer ring 812 to complete the installation of the end cover 8. There is no need to turn non-standard threads, which makes the end cover 8 easier to install, and the processing cost is lower and the processing is simpler.

[0036] Example 2:

[0037] like Figure 1-5 As shown, based on the above-mentioned embodiment 1, this embodiment provides a preferred structure that can make the end cover 8 easier to install: the end cover 8 includes a plurality of independent end face blocks 81, each end face block 81 has a fastening hole 811, and an outer ring 812 is integrally formed on the outer surface of each end face block 81.

[0038] In this embodiment: the dividing line is on the fastening hole 811, which can effectively prevent the end cover 8 from sliding or falling off toward the middle cavity of the valve body 6, and can stabilize the position of the end cover 8. Since the end cover 8 includes multiple independent end face blocks 81, the dividing line gap of the end cover 8 can be made relatively large, and the outer rings 812 of the multiple end face blocks 81 after segmentation are respectively inserted into the snap-in groove 61 from the inside to the outside. In the prior art, the screw and threaded end cover 8 is easier to install for valves with slightly smaller diameters, but there may also be situations where the thread is not processed well and cannot be rotated. The larger the diameter, the greater the difficulty of assembly, and the lower the assembly efficiency. Therefore, the installation of the ball valve will be further easier.

[0039] Preferably, a limiting step 62 is integrally formed on the inner wall of the valve body 6, and a limiting protrusion 111 is integrally formed on the outer surface of the support ring 11. The limiting protrusion 111 can contact the limiting step 62. When the support ring 11 is installed in the valve body 6, the limiting protrusion 111 will contact the limiting step 62, so that the support ring 11 can no longer move toward the inside of the valve body 6, thereby better limiting the position of the support ring 11.

[0040] Example 3:

[0041] like Figure 1 As shown, based on the above-mentioned embodiment 1, this embodiment provides a preferred structure that can further improve the sealing performance of the entire ball valve: one end of the valve ball 14 is mounted with a lower valve stem 1 that passes through the valve body 6 via a bearing 15. The lower valve stem 1 has a channel 101 that communicates with the valve body 6, and a screw plug 2 is installed in the channel 101. The valve body 6 and the lower valve stem 1 are connected by a stud 4, on which a nut 5 is installed. A spiral wound gasket 3 is also installed between the valve body 6 and the lower valve stem 1. By installing the spiral wound gasket 3 between the valve body 6 and the lower valve stem 1, the sealing performance between the valve body 6 and the lower valve stem 1 is improved.

[0042] Preferably, the other end of the valve ball 14 is equipped with an upper valve stem 19 passing through the valve body 6, and a stuffing box 21 is installed between the upper valve stem 19 and the valve body 6. Packing 18 and a pressure ring 20 are installed between the stuffing box 21 and the upper valve stem 19 from bottom to top. A pressure cover 23 is also installed on the upper end of the pressure ring 20. The pressure cover 23 is connected to the stuffing box 21 by a bolt 22. By installing the stuffing box 21 between the upper valve stem 19 and the valve body 6 and installing the packing 18 and the pressure ring 20 between the stuffing box 21 and the upper valve stem 19 from bottom to top, the sealing between the upper valve stem 19 and the valve body 6 can be improved, thereby improving the sealing of the entire ball valve.

[0043] The above embodiments and the specific parameters therein are only for the purpose of clearly describing the invention verification process and are not intended to limit the scope of patent protection of the present invention, which shall still be subject to the claims.

Claims

1. An integrated jacketed ball valve, comprising a valve body (6), an end cover (8) and a valve ball (14) mounted in the valve body (6), characterized in that: A sealing pressure ring (9) and a support ring (11) are also installed in the valve body (6), a valve seat (16) is installed in the support ring (11), and a sealing member (10) is installed between the support ring (11) and the sealing pressure ring (9); the end cover (8) includes a plurality of independent end face blocks (81), each of which is provided with a fastening hole (811), and an outer ring (812) is integrally formed on the outer surface of each end face block (81); the valve body (6) is provided with a plurality of end face blocks (811) and a plurality of end face blocks (812) are ... with each other; the valve body (6) is provided with a plurality of end face blocks (811) and a plurality of end face blocks (811) are integrally formed with each other; the valve body (6) is provided with a plurality of end face blocks (811) and a plurality of end face blocks (812) are integrally formed with each other; the valve body (6) is provided with a plurality of end face blocks (811) and a plurality of end face blocks (811) are integrally formed with each other; the valve body (6) is provided with a plurality of end face blocks (811) and a plurality of end face blocks (812) are integrally formed with each other; the valve body (6) is provided with a plurality of end face blocks (811) and a plurality of end face blocks (811) are integrally formed with There is a snap-fit groove (61), the outer ring (812) can be snapped into the snap-fit groove (61), a plurality of fastening holes (811) are evenly opened on the end cover (8), and a fastener that can contact the sealing pressure ring (9) is installed in the fastening hole (811); a limiting step (62) is also integrally formed on the inner wall of the valve body (6), and a limiting protrusion (111) is integrally formed on the outer surface of the support ring (11), and the limiting protrusion (111) can contact the limiting step (62).

2. The integrated jacketed ball valve according to claim 1, characterized in that: The fastener is a hexagon socket screw (7).

3. The integrated jacketed ball valve according to claim 1, characterized in that: The sealing member (10) is a gasket.

4. The integrated jacketed ball valve according to claim 1, characterized in that: A plurality of spring holes (112) are provided in the support ring (11), and a spring (17) in contact with the valve seat (16) is installed in the spring hole (112).

5. The integrated jacketed ball valve according to claim 1, characterized in that: An O-ring (13) and braided graphite (12) are installed between the valve seat (16) and the support ring (11).

6. The integrated jacketed ball valve according to claim 1, characterized in that: One end of the valve ball (14) is mounted with a lower valve stem (1) passing through the valve body (6) via a bearing (15); a channel (101) communicating with the valve body (6) is opened in the lower valve stem (1); a screw plug (2) is mounted in the channel (101).

7. The integrated jacketed ball valve according to claim 6, characterized in that: The valve body (6) and the lower valve stem (1) are connected via a stud (4), a nut (5) is installed on the stud (4), and a winding gasket (3) is also installed between the valve body (6) and the lower valve stem (1).

8. The integrated jacketed ball valve according to claim 1, characterized in that: The other end of the valve ball (14) is installed with an upper valve stem (19) passing through the valve body (6), a stuffing box (21) is installed between the upper valve stem (19) and the valve body (6), and packing (18) and a pressure ring (20) are installed between the stuffing box (21) and the upper valve stem (19) from bottom to top. A pressure cover (23) is also installed on the upper end of the pressure ring (20), and the pressure cover (23) and the stuffing box (21) are connected by bolts (22).

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