High-pressure three-way ball valve

Abstract

The utility model provides a high-pressure three-way ball valve which comprises a valve body, a main valve cover, a three-way ball body, a valve rod and a valve seat assembly. The supporting ring, the three-way ball body and the valve seat assembly are all contained in a through cavity of the valve body, the valve seat assembly tightly holds the three-way ball body, the main valve cover arranged above the valve body is in bolt connection with the valve body and in pin connection with the supporting ring, and different medium channels can be formed by the ball valve by rotating the valve rod in key connection with the three-way ball body. The valve seat assembly comprises a valve seat body, a first sealing ring, a pressing ring and a spring, the valve seat body is of a stepped barrel structure with the upper section large in inner diameter and the lower section small in inner diameter, a flange is arranged on the upper portion of the valve seat body, the first sealing ring is installed in the flange, the pressing ring is connected to the outer side of the flange through a screw, and the spring is installed on the inner wall of the small-inner-diameter section of the lower portion of the valve seat body. The ball valve can achieve the function of switching between a single-channel state and a multi-channel state, meets the requirements for medium conveying and cleaning of a waterway pipeline of a hydraulic decoking device, and meanwhile is simple in action of an execution structure and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical valves, and specifically relates to a high-pressure three-way ball valve. Background Art

[0002] The hose used in the hydraulic decoking system (i.e., high-pressure rubber hose) is an essential flexible pipeline for high-pressure water transportation. According to its usage method, it is mainly divided into single-pipe configuration and double-pipe configuration (i.e., dividing high-pressure water into two paths to enter the high-pressure rubber hose). When the decoking device is applied in cold regions, the high-pressure water pipeline is extremely prone to ice formation, causing pipeline blockage. To avoid this problem, the water pipeline is often cleaned after decoking to remove the retained water. For the double-pipe configuration pipeline (simultaneous purging of two paths), the above cleaning effect is not good, and there is still a hidden danger that the retained water in the pipeline freezes and blocks the pipeline. It is necessary to use the steam ice melting method to dredge the pipeline before use, but the operation is cumbersome, time-consuming and laborious. Therefore, for the high-pressure water path with double-pipe configuration, a three-way valve can be configured. During decoking, it outputs in two paths to transport the decoking medium, and after decoking, it switches to single-path output to clean the retained substances in the pipeline, ensuring the smoothness of the high-pressure water pipeline.

[0003] As an element of the high-pressure water pipeline, this valve is of high importance and has harsh working conditions. Currently, a three-way plug valve is applied. Its operation is cumbersome (lifting - rotating - pressing down). When there is a single power source input, the transmission mechanism is complex, the switching time is long, and the failure rate is high (easy to get stuck). When there are two power sources input, the cost is expensive. Therefore, the comprehensive use effect is not good.

[0004] In view of the above problems, it is necessary to provide a high-pressure three-way ball valve that can realize the mutual switching function between single-path and multi-path states, meet the requirements of medium transportation and cleaning of the water pipeline in the hydraulic decoking device, and at the same time, the execution structure has simple actions and high reliability. Content of the Utility Model

[0005] In order to solve the deficiencies in the prior art, the utility model provides a high-pressure three-way ball valve, which can realize the mutual switching function between single-path and multi-path states, meet the requirements of medium transportation and cleaning of the water pipeline in the hydraulic decoking device, and at the same time, the execution structure has simple actions and high reliability.

[0006] To achieve the above purpose, the specific solution adopted by the utility model is as follows:

[0007] A high-pressure three-way ball valve includes a valve body, a main valve cover, a side valve cover, a three-way ball, a valve stem, a support ring, a gland, a connecting sleeve, a bracket, and a valve seat assembly. The valve body has a through cavity composed of three valve pipes connected in a T shape and a top connection channel; the support ring, the three-way ball, and the valve seat assembly are all accommodated in the through cavity of the valve body. The valve seat assembly semi-wraps and holds the three-way ball tightly. The main valve cover located above the valve body is bolted to the valve body and pinned to the support ring respectively. One end of the valve stem is key-connected to the three-way ball to drive the three-way ball to rotate inside the valve body, and the other end passes through the main valve cover and the connecting sleeve and is key-connected. The connecting sleeve is key-connected to an external pneumatic or electric driving device; by rotating the valve stem, the ball valve can form "one inlet and one outlet" and "one inlet and two outlets" type medium channels;

[0008] The valve seat assembly includes a valve seat body, a first sealing ring, a pressure ring, and a spring. The valve seat body is a stepped cylinder structure with a larger inner diameter in the upper section and a smaller inner diameter in the lower section. The upper part of the valve seat body has a flanging. The first sealing ring is installed inside the flanging. The outside of the flanging is connected with a pressure ring for pressing the first sealing ring by screws. A spring is installed on the inner wall of the small inner diameter section at the lower part of the valve seat body to provide an elastic force for the valve seat body, thereby ensuring the sealing performance between the three-way ball and the valve seat body.

[0009] Further, a stepped hole with two levels of upper and lower parts is provided in the middle of the main valve cover. The upper part of the stepped hole is provided with a gland that is bolted to the main valve cover in cooperation with the upper step, and the lower part is provided with a second sealing ring that can seal the valve stem in cooperation with the gland and the lower step.

[0010] Further, the lower section of the main valve cover extends into the top connection channel of the valve body and is bolted to the support ring.

[0011] Further, the first sealing ring is made of non-metallic material or surfacing hard alloy material.

[0012] Further, a groove is provided on the bottom wall of the through cavity. At least one first drain groove is vertically provided on the side wall of the groove, and a first drain port is provided at the center of the groove. The first drain port can be blocked by a threaded plug.

[0013] Further, a support disk is provided in the groove and is pinned to the valve body. The support disk is a liquid-collecting disk-shaped structure. A second drain port is provided at the center of the bottom of the disk. Second drain grooves are provided on the bottom of the disk and are matched with the first drain grooves to form a drain channel at the lowest point of the valve cavity.

[0014] Further, lifting holes are provided at the four corner parts of the top of the valve body, and lifting rings are installed in the lifting holes for the overall lifting of the equipment.

[0015] Further, the bracket is located above the main valve cover. The bracket is a cylindrical structure, and a number of observation holes are evenly distributed around it. A scale groove is provided at the lower edge of the circumference of the holes for observing and indicating the valve position state.

[0016] Furthermore, a limiting groove is provided on the outer circle of the connecting sleeve, which can cooperate with the bracket through a limiting pin to achieve mechanical protection of the valve position.

[0017] Beneficial effects:

[0018] The high-pressure three-way ball valve in the present utility model mainly consists of a valve body, a three-way ball and a valve seat assembly. The three-way ball is surrounded by the valve seat assembly; a first sealing ring is arranged at the large inner diameter end of the valve seat assembly, and the first sealing ring contacts the three-way ball to form a sealing ring belt. A spring is arranged in the small inner diameter section of the valve seat assembly to form a forced sealing force, realizing reliable sealing of the three-way ball; a valve stem is arranged above the three-way ball, and the valve stem is connected to the driving device through a connecting sleeve. Under the action of the driving device, the three-way ball rotates 90° or 180°, constructing different medium passages, and then completing the work of conveying water through the ball valve and cleaning the stagnant substances. At the same time, the valve seat assembly is of a split structure, and the switching between soft and hard sealing types can be realized by replacing the first sealing rings of different materials. In summary, the ball valve has strong versatility, a single execution action, high reliability, and low manufacturing and operating costs. Description of the drawings

[0019] Figure 1 It is an overall cross-sectional view of the high-pressure three-way ball valve in the present utility model.

[0020] Figure 2 It is a structural schematic diagram of the valve body.

[0021] Figure 3 It is a structural schematic diagram of the main valve cover.

[0022] Figure 4 It is a schematic diagram of the connection state of the main valve cover and the gland.

[0023] Figure 5 It is a structural schematic diagram of the three-way ball.

[0024] Figure 6 It is a structural schematic diagram of the valve seat assembly.

[0025] Figure 7 It is a structural schematic diagram of the connecting sleeve.

[0026] Figure 8 It is a cross-sectional view of the bracket.

[0027] Figure 9 It is a structural schematic diagram of the support disc.

[0028] Illustration marks:

[0029] 1. Valve seat assembly, 101. Pressure ring, 102. Valve seat body, 103. Placement groove, 104. Spring, 105. First sealing ring;

[0030] 2. Side valve cover;

[0031] 3. Valve body, 301. Valve pipeline, 302. Lifting hole, 303. Groove, 304. First mounting hole, 305. Through cavity, 306. First drain groove, 307. First drain port, 308. First pin hole;

[0032] 4. Main valve cover, 401. Bracket mounting hole, 402. Gland hole, 403. Second mounting hole, 404. Second pin hole, 405. Sealing cavity;

[0033] 5. Gland;

[0034] 6. Hoop;

[0035] 7. Connecting sleeve, 701. Limit groove, 702. Scale line;

[0036] 8. Limit pin;

[0037] 9. Bracket, 901. Observation hole, 902. Scale groove;

[0038] 10. Second sealing ring;

[0039] 11. Pin;

[0040] 12. Valve stem;

[0041] 13. Support ring;

[0042] 14. Three-way ball, 1401. Channel, 1402. Upper support section, 1403. Flat groove, 1404. Lower support section;

[0043] 15. Support plate, 1501. Third pin hole, 1502. Second drain port, 1503. Second drain groove;

[0044] 16. Plug. Detailed implementation manners

[0045] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0046] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present utility model.

[0047] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0048] The utility model discloses a high-pressure three-way ball valve, which mainly comprises a valve seat assembly 1, a side valve cover 2, a valve body 3, a main valve cover 4, a gland 5, a connecting sleeve 7, a bracket 9, a valve stem 12, a support ring 13, and a three-way ball 14. Please refer to Figure 1 and Figure 2 , the valve body 3 has a through cavity 305 composed of three valve pipes 301 connected in a T shape and a top connection channel; the support ring 13, the three-way ball 14 and the valve seat assembly 1 are all accommodated in the through cavity 305 of the valve body 3. The valve seat assembly 1 semi-wraps and holds the three-way ball 14 tightly. The valve stem 12 is connected to the three-way ball 14 in a matching manner. Under the action of an external electric or pneumatic driving device, the valve stem 12 drives the ball 14 to rotate, realizing the docking of the ball valve flow channel and forming a one-in-two-out or one-in-one-out type medium channel. Each component will be elaborated in detail below.

[0049] <Valve seat assembly 1>

[0050] As Figure 6 shown, the valve seat assembly 1 includes a valve seat body 102, a first sealing ring 105, a pressing ring 101 and a spring 104. The valve seat body 102 is a stepped cylinder structure with a larger inner diameter in the upper section and a smaller inner diameter in the lower section. The upper part of the valve seat body 102 has a flanging, and a groove is arranged inside the flanging for installing the first sealing ring 105. The outer side of the flanging is connected with a pressing ring 101 by screws for pressing the first sealing ring 105 tightly. A plurality of placement grooves 103 are arranged on the inner wall of the lower small inner diameter section of the valve seat body 102 for installing the spring 104. The spring 104 is used to provide an elastic force for the valve seat body 102, thereby ensuring the sealing performance between the three-way ball 14 and the valve seat body 102.

[0051] Particularly, in the valve seat assembly 1, the first sealing ring 105 can be made of non-metal (such as nylon) or metal (surfacing hard alloy) materials, realizing the switching function of different sealing types such as soft seal or metal hard seal, with strong adaptability.

[0052] When the first sealing ring 105 is made of metal (hardfacing cemented carbide), the valve seat assembly 1 has a scraping function, which can scrape off the aggregates formed by adsorption on the spherical surface of the three-way ball 14 or other reasons, protect the sealing surface, and improve the sealing effect.

[0053] <Valve body 3>

[0054] Such as Figure 1 and 2 As shown, the valve body 3 is a cuboid structure with a top connection channel (i.e., an open top), and three side faces are configured with valve pipes 301 connected in a T shape for the installation of the valve seat assembly 1 and the mating connection with the side valve cover 2; the top connection channel of the valve body 3 is mated with the main valve cover 4 and bolted through the first mounting hole 304.

[0055] At the bottom of the through cavity 305 in the valve body 3, a groove 303 for installing the support disk 15 is provided. Several first drain grooves 306 are vertically arranged on the side wall of the groove 303, a first pin hole 308 is provided on the bottom wall of the groove 303, a first drain port 307 is arranged at the center of the groove 303, and the first drain port 307 can be sealed with a threaded plug 16.

[0056] A support ring 13 is arranged near the lower end of the main valve cover 4 in the through cavity 305 for supporting the three-way ball 14 and the valve stem 12. The support ring 13 and the main valve cover 4 are connected by a pin 11, which can prevent the circumferential rotation of the support ring 13 and improve the overall reliability.

[0057] Lifting holes 302 are arranged at the four corners of the top of the valve body 3, and lifting rings 6 are installed in the lifting holes 302 for the overall lifting of the equipment.

[0058] <Main valve cover 4 and gland 5>

[0059] Such as Figure 3 shown and Figure 4 shown, the main valve cover 4 is bolted to the valve body 3. A bracket mounting hole 401 is arranged at the top of the main valve cover 4, a gland hole 402 is arranged inside, a gland 5 is installed in the gland hole 402, and the gland 5 is bolted to the main valve cover 4 through the second mounting hole 403. After bolting, a sealing cavity 405 is formed between the gland 5 and the main valve cover 4, and a second sealing ring 10 is installed in the sealing cavity 405 to achieve the sealing of the valve stem 12 part.

[0060] <Three-way ball 14>

[0061] Such as Figure 5 shown, the three-way ball 14 has its six faces chamfered at the top, and three channels 1401 are arranged along two perpendicular axis directions. Support sections are arranged up and down. The lower support section 1404 is mated with the support disk 15, and a flat groove 1403 is arranged on the upper support section 1402 for the mating connection with the valve stem 12.

[0062] In particular, by controlling the rotation of the three-way sphere 14 to different positions, the functions of "one inlet and one outlet" and "one inlet and two outlets" can be achieved, and different flow channels for the medium can be constructed.

[0063] <Valve stem 12>

[0064] The valve stem 12 is of a stepped structure as a whole. A rectangular flat head is provided at the large end (with the same shape as the inner flat groove 1403 in the three-way sphere 14), which can be cooperatively connected with the three-way sphere 14. A keyway is provided at the small end for key connection with the connecting sleeve 7.

[0065] <Connecting sleeve 7>

[0066] As Figure 7 shown, one end of the connecting sleeve 7 is sleeved on the valve stem 12, and one end is inserted into the driving device, and both are key-connected; a limit groove 701 is provided on the outer circle of the connecting sleeve, and it can be connected to the bracket 9 through the limit pin 8 to achieve mechanical protection of the valve position.

[0067] Furthermore, a number of valve position indication scale lines 702 are provided on the outer circle of the connecting sleeve 7 for indicating the valve position.

[0068] <Bracket 9>

[0069] Into Figure 8 shown, the bracket 9 is arranged above the main valve cover 4 and is fixedly connected through the mounting column that fits with the bracket mounting hole 401. The bracket 9 is of a cylindrical structure, and a number of observation holes 901 are evenly distributed around it. A scale groove 902 is provided at the lower edge of the hole circumference for observing and indicating the valve position state.

[0070] <Supporting disk 15>

[0071] As Figure 9 shown, the supporting disk 15 is placed in the groove 303. The supporting disk 15 is of a liquid-collecting disk type structure. A second drain port 1502 is provided at the center of the bottom of the disk, and a second drain groove 1503 that cooperates with the first drain groove 306 is provided at the bottom of the disk to form a drain channel at the low point of the valve cavity.

[0072] In particular, the drain channel formed by the combination of the valve body 3 and the supporting disk 15 also has the function of sewage discharge, and the valve cavity can be cleaned and drained when needed.

[0073] Furthermore, the supporting disk 15 and the valve body 3 are connected by a pin that fits with the first pin hole 308 and the third pin hole 1501 to prevent rotation and improve the overall reliability.

[0074] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any equivalent transformation or modification made according to the essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-pressure three-way ball valve, characterized in that, It includes a valve body (3), a main valve cover (4), a side valve cover (2), a three-way ball (14), a valve stem (12), a support ring (13), a gland (5), a connecting sleeve (7), a bracket (9), and a valve seat assembly (1). The valve body (3) has a through cavity (305) composed of three valve pipes (301) connected in a T shape and a top connection channel; the support ring (13), the three-way ball (14), and the valve seat assembly (1) are all accommodated in the through cavity (305) of the valve body (3). The valve seat assembly (1) semi-wraps and holds the three-way ball (14). The main valve cover (14) located above the valve body (3) is bolted to the valve body (3) and pinned to the support ring (13). One end of the valve stem (12) is key-connected to the three-way ball (14) to drive the three-way ball (14) to rotate inside the valve body (3), and the other end passes through the main valve cover (4) and is key-connected to the connecting sleeve (7). The connecting sleeve (7) is key-connected to an external pneumatic or electric driving device; by rotating the valve stem (12), a "one-in-one-out" and "one-in-two-out" type medium channel can be formed for the ball valve. The valve seat assembly (1) includes a valve seat body (102), a first sealing ring (106), a pressing ring (101), and a spring (105). The valve seat body (102) is a stepped cylinder structure with a larger inner diameter in the upper section and a smaller inner diameter in the lower section. The upper part of the valve seat body (102) has a flanging. The first sealing ring (106) is installed inside the flanging, and a pressing ring (101) for pressing the first sealing ring (106) is connected by screws on the outer side of the flanging. A spring (105) is installed on the inner wall of the small inner diameter section at the lower part of the valve seat body (102) to provide an elastic force for the valve seat body (102), thereby ensuring the sealing between the three-way ball (14) and the valve seat body (102).

2. The high-pressure three-way ball valve according to claim 1, characterized in that, In the middle of the main valve cover (4), a stepped hole with upper and lower levels is provided. The upper part of the stepped hole is provided with a gland (5) bolted to the main valve cover (4) in cooperation with the upper step, and a second sealing ring (10) capable of sealing the valve stem (12) is provided in the lower part in cooperation with the gland (5) and the lower step.

3. The high-pressure three-way ball valve according to claim 2, characterized in that, The lower section of the main valve cover (4) extends into the top connection channel of the valve body (3) and is bolted to the support ring (13).

4. A high-pressure three-way ball valve according to claim 1, characterized in that, The first sealing ring (106) is made of non-metallic material or surfacing hard alloy material.

5. A high-pressure three-way ball valve according to claim 1, characterized in that A groove (303) is provided on the bottom wall of the through cavity (305). At least one first drain groove (306) is vertically provided on the side wall of the groove (303). A first drain port (307) is provided at the center of the groove (303), and the first drain port (307) can be sealed with a threaded plug.

6. The high-pressure three-way ball valve according to claim 5, wherein A support disk (15) pinned to the valve body (3) is provided in the groove (303). The support disk (15) is a liquid-collecting disk-shaped structure. A second drain port (1502) is provided at the center of the bottom of the disk, and a second drain groove (1503) matching the first drain groove (306) is provided on the bottom of the disk to form a drain channel at the low point of the valve cavity.

7. The high-pressure three-way ball valve according to claim 1, characterized in that, Lifting holes (302) are provided at the four corner parts of the top of the valve body (3), and lifting rings (6) are installed in the lifting holes (302) for the overall lifting of the equipment.

8. A high-pressure three-way ball valve according to claim 1, characterized in that, The bracket (9) is arranged above the main valve cover (4). The bracket (9) is of a cylindrical structure, and a number of observation holes (901) are evenly distributed around it. A scale groove (902) is provided at the lower edge of the circumference of the holes for observing and indicating the valve position state.

9. The high-pressure three-way ball valve according to claim 8, characterized in that, A limit groove (701) is provided on the outer circle of the connecting sleeve (7), and it can cooperate with the bracket (9) through a limit pin (8) to achieve mechanical protection of the valve position.

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