Hard sealing high-pressure welding ball valve

Abstract

The hard sealing high-pressure welding ball valve comprises a valve body, the upper end of the valve body is fixedly connected with a hydraulic control valve, a lubricating groove is formed in the inner wall of the hydraulic control valve, the hydraulic control valve is rotationally connected with a rotating rod, and the end, away from the hydraulic control valve, of the rotating rod is fixedly connected with a spherical valve element; openings in the two ends of the valve body are each provided with a horn groove, the horn grooves in the two ends are arranged in a mirror image mode, two scraping rings are arranged on the inner wall of the valve body in a mirror image mode, the two scraping rings are arranged on the two sides of the spherical valve element respectively, and a cleaning mechanism used for cleaning chemical crystals is arranged in the valve body. By means of the structure, crystals condensed in the valve body can be removed, and the situation that due to crystal blockage, the circulation effect of a pipeline becomes poor, and the fluid conveying effect is affected is avoided.

Description

Technical Field

[0001] The invention relates to the field of high-pressure valves, and in particular to a hard-sealed high-pressure welded ball valve. Background Art

[0002] In the modern industrial field, especially in the chemical, petroleum, and natural gas transportation industries, valves are key equipment for controlling the on / off and flow regulation of fluid media. Their performance is directly related to the stability, safety, and economic benefits of the entire production process. Traditional high-pressure welded ball valves have gradually exposed many thorny problems in long-term practical applications, giving rise to an urgent need for new ball valve designs. This is the background for the birth of the hard-sealed high-pressure welded ball valve of the present invention.

[0003] In the chemical and petroleum industries, a large number of fluid media have complex compositions and often contain various easily crystallized substances. For example, in some chemical synthesis processes, salt solutions, organic compounds and other media are very likely to form crystal accumulation inside the valve as the temperature and pressure change or stand for a long time. These crystals will not only block the valve channel, hinder the normal delivery of the fluid, and cause production interruptions, but may also damage the mechanical structure inside the valve due to crystal expansion, causing the valve core to get stuck and the sealing surface to wear more severely, greatly shortening the service life of the valve. Moreover, removing these crystals often requires shutting down and disassembling the valve, which consumes a lot of manpower, material resources and time costs, and seriously affects production efficiency. Based on this, the present invention proposes a new hard-sealed high-pressure welded ball valve. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a hard-sealed high-pressure welded ball valve.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A hard-sealed high-pressure welded ball valve comprises a valve body, the upper end of the valve body is fixedly connected to a hydraulic control valve, the inner wall of the hydraulic control valve is provided with a lubrication groove, the hydraulic control valve is rotatably connected to a rotating rod, the two end openings of the valve body are respectively provided with trumpet grooves, the trumpet grooves at both ends are mirror-imaged, the inner wall of the valve body is mirror-imaged with two scraper rings, the two scraper rings are respectively provided on both sides of the ball valve core, the end of the rotating rod away from the hydraulic control valve is fixedly connected to the ball valve core, a cleaning mechanism for cleaning chemical crystals is provided in the valve body, and a lubrication mechanism for lubricating the rotating rod is provided in the valve body.

[0006] Preferably, the lubrication mechanism consists of a cylinder body, a piston, a piston rod, a return spring, a lubricating oil tank, an oil inlet pipe, and a lubricating pipe. The lubricating oil tank is fixedly connected to the outer wall of the valve body, the cylinder body is fixedly connected to the axial outer wall of the valve body, the valve body is provided with a groove, the groove is communicated with the cylinder body, the piston is slidably connected to the inner wall of the cylinder body, one end of the piston rod is fixedly connected to the piston and the other end passes through the cylinder body for sliding connection, the return spring is sleeved on the outer wall of the piston rod, one end of the return spring is fixedly connected to the cylinder body, and the other end is fixedly connected to the piston, one end of the oil inlet pipe is fixedly connected to the cylinder body and the other end is fixedly connected to the lubricating oil tank, one end of the lubricating pipe is fixedly connected to the cylinder body, and the other end passes through the hydraulic control valve and is communicated with the lubrication groove.

[0007] Preferably, an alarm device is fixedly connected to the upper end of the cylinder body, and a proximity switch is provided at one end of the alarm device close to the cylinder body.

[0008] Preferably, a filter plate is provided in the valve body, and a plurality of densely distributed filter holes are formed on the filter plate.

[0009] Preferably, the cleaning mechanism consists of an air valve, an air outlet pipe, a connecting piece, a rotating shaft, and five air jet brushes. The air valve is fixedly connected to the outer wall of the valve body, the air outlet pipe runs through the valve body, one end of the air outlet pipe is fixedly connected to the air valve and the other end is fixedly connected to the connecting piece, the connecting piece is rotatably connected to the rotating shaft, the five air jet brushes are fixedly connected to the axial outer wall of the rotating shaft at equal intervals, the rotating shaft is hollow, the interior of the air jet brush is hollow, the air jet brush is connected to the rotating shaft, the five air jet brushes are provided with air jet holes densely distributed at equal intervals, and the rotating shaft runs through and rotatably connects to the filter plate.

[0010] Preferably, five cleaning brushes are fixedly connected at equal intervals at one end of the rotating shaft away from the connecting piece, and the scraping surfaces of the five cleaning brushes are tightly fitted with the filter plate. The five cleaning brushes are respectively fixedly connected with scraping rods, and the scraping surfaces of the scraping rods are tightly fitted with the inner wall of the valve body.

[0011] Preferably, the five cleaning brushes are respectively fixedly connected to scraper rods, the scraping surfaces of the scraper rods are tightly fitted with the inner wall of the valve body, and the scraping surfaces of the scraper rods are provided with rounded corners to prevent the surface of the scraper rods from scratching the inner wall of the valve body.

[0012] The present invention has the following beneficial effects: 1. By setting up a cleaning mechanism and opening the air valve, high-pressure gas is delivered to the air jet brush through the air outlet pipe and the rotating shaft. The high-speed airflow ejected from the air jet hole can directly impact and blow away the crystals attached to the inside of the valve body, the filter plate and around the spherical valve core to prevent crystal accumulation and blockage of the valve. At the same time, the cleaning brush at the other end of the rotating shaft works closely with the scraper rod to mechanically scrape and clean the filter plate and the inner wall of the valve body, further ensuring that there is no crystal residue inside the valve, maintaining the unobstructed flow of the valve, greatly extending the valve maintenance cycle, and reducing the downtime and cleaning time caused by crystallization. The air jet and mechanical scraping complement each other and have excellent cleaning effects on crystals of different shapes and hardness. Whether it is soft crystal flocs or hard crystal particles, they can be efficiently removed to ensure the continuity and stability of chemical product transportation.

[0013] 2. By setting up a lubrication mechanism, the piston can slide in the cylinder body, and the lubricating oil in the lubricating oil tank is transported to the lubrication groove of the hydraulic control valve through the oil inlet pipe and the lubrication pipe, so as to lubricate the contact parts between the rotating rod and related components, effectively reducing the friction resistance of the rotating rod rotation, reducing wear, and increasing the service life of the rotating rod and the entire valve, avoiding problems such as rotating rod jamming and poor sealing caused by poor lubrication, ensuring that the valve is always in good operating condition, and improving the safety and reliability of the chemical production process.

[0014] 3. The trumpet grooves at the openings on both ends of the valve body can guide the chemical fluid flowing into and out of the valve, making the fluid flow in and out of the valve more smoothly and reducing turbulence and local pressure changes. This not only reduces the impact and wear of the fluid on the inner wall of the valve, but also prevents the chemicals from precipitating and crystallizing near the inlet or outlet of the valve due to poor fluid flow. The scraper ring arranged on the inner wall can scrape off the impurities and tiny crystal particles attached to both sides of the valve core and the corresponding positions of the valve body during the rotation of the spherical valve core, so that they are taken away with the fluid, avoiding the accumulation of impurities that affect the sealing performance of the valve core and the opening and closing function of the valve, further improving the overall performance of the valve, and ensuring the precision control and high efficiency of chemical transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a hard-sealed high-pressure welded ball valve proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of a hard-sealed high-pressure welded ball valve proposed by the present invention; Figure 3 A cross-sectional view of a hard-sealed high-pressure welded ball valve proposed by the present invention; Figure 4 A cross-sectional view of the internal structure proposed by the present invention; Figure 5 for Figure 3 A is an enlarged schematic diagram of the structure.

[0016] In the figure: 1 valve body, 2 hydraulic control valve, 3 cylinder body, 4 air valve, 5 lubricating oil tank, 6 alarm device, 7 ball valve core, 8 rotating rod, 9 scraper ring, 101 oil inlet pipe, 102 lubricating pipe, 201 groove, 202 piston, 203 piston rod, 204 return spring, 301 filter plate, 302 rotating shaft, 303 cleaning brush, 304 scraper rod, 401 air outlet pipe, 402 connecting piece, 403 air jet brush, 501 horn groove, 601 lubricating groove. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Embodiment 1:

[0019] Reference Figure 1-4 , a hard-sealed high-pressure welded ball valve, comprising a valve body 1, a hydraulic control valve 2 is fixedly connected to the upper end of the valve body 1, a lubrication groove 601 is provided on the inner wall of the hydraulic control valve 2, the hydraulic control valve 2 is rotatably connected to a rotating rod 8, and a spherical valve core 7 is fixedly connected to the end of the rotating rod 8 away from the hydraulic control valve 2, a cleaning mechanism for cleaning chemical crystals is arranged in the valve body 1, a lubrication mechanism for lubricating the rotating rod 8 is arranged in the valve body 1, a filter plate 301 is arranged in the valve body 1, and a plurality of densely distributed filter holes are opened on the filter plate 301, and trumpet grooves 501 are respectively opened at the openings at both ends of the valve body 1, and the trumpet grooves 501 at both ends are mirror-imaged, and two scraper rings 9 are mirror-imaged on the inner wall of the valve body 1, and the two scraper rings 9 are respectively arranged on both sides of the spherical valve core 7. It should be noted that the two scraper rings 9 are made of copper, which can remove crystals without easily damaging the valve body, and the ratio of the top opening to the bottom opening of the trumpet groove 501 should not be less than one to two.

[0020] In this embodiment, when it is necessary to switch the ball valve core 7, it is only necessary to open the hydraulic control valve 2. When the hydraulic control valve 2 is working, it will push the rotating rod 8 to rotate. When the rotating rod 8 rotates, it will drive the ball valve core 7 to rotate, thereby achieving the effect of opening the valve. At the same time, when the ball valve core 7 rotates, the condensed crystals adhered to the ball valve core 7 will be scraped off by the scraper ring 9 to prevent the crystals from adhering to the ball valve core 7 and affecting the opening and closing of the valve. At the same time, when the ball valve core 7 is opened, the chemical liquid transported by the pipeline will first enter the valve through the openings at both ends of the valve body 1. At this time, the horn groove 501 plays a guiding role, allowing the fluid to flow in smoothly, reducing turbulent impact and reducing the risk of wear on the internal components of the valve. At this time, the chemical liquid flowing into the valve will first pass through the filter plate 301, and the filter hole will intercept the solid impurity particles in the fluid to prevent them from entering the key parts of the valve, thereby protecting the ball valve core 7, sealing components, etc. from wear or blockage, thereby ensuring the normal operation of the valve.

[0021] Embodiment 2:

[0022] Further references Figure 1-3 Compared with the first embodiment, in the present embodiment, the lubrication mechanism comprises a cylinder body 3, a piston 202, a piston rod 203, a return spring 204, a lubricating oil tank 5, an oil inlet pipe 101, and a lubricating pipe 102. The lubricating oil tank 5 is fixedly connected to the outer wall of the valve body 1, the cylinder body 3 is fixedly connected to the axial outer wall of the valve body 1, a groove 201 is provided on the valve body 1, the groove 201 is communicated with the cylinder body 3, the piston 202 is slidably connected to the inner wall of the cylinder body 3, one end of the piston rod 203 is fixedly connected to the piston 202, and the other end penetrates and is slidably connected to the cylinder body 3. The return spring 204 is sleeved on the outer wall of the piston rod 203, one end of the return spring 204 is fixedly connected to the cylinder body 3, and the other end is fixedly connected to the piston 202. One end of the oil inlet pipe 101 is fixedly connected to the cylinder body 3 and the other end is fixedly connected to the lubricating oil tank 5. One end of the lubricating pipe 102 is fixedly connected to the cylinder body 3, and the other end passes through the hydraulic control valve 2 and is connected to the lubricating groove 601. It should be noted that the cylinder body 3 and the piston 202 are sealed, and one-way valves are provided in the oil inlet pipe 101 and the lubricating pipe 102 to prevent the backflow of lubricating oil.

[0023] In this embodiment, when the rotating rod 8 drives the ball valve core 7 to open and close, the fluid pressure inside the valve body 1 will increase or decrease with the opening and closing of the ball valve core 7. When the ball valve core 7 is in a closed state, the fluid pressure inside the valve body 1 increases. At this time, the piston 202 is lifted and displaced by the fluid. At this time, the piston 202 will push the piston rod 203 to move when moving, and the lubricating oil in the lubricating oil tank 5 is transported from the inside of the cylinder body 3 through the oil inlet pipe 101 to the lubrication groove 601 through the lubricating pipe 102 to lubricate the rotating rod 8, so as to avoid rust and wear of the rotating rod 8 after long-term use, resulting in difficulty in opening the valve. When the ball valve core 7 is in an open state, the pressure inside the valve decreases, and the reset spring 204 will push the piston 202 downward, so that the lubricating oil in the lubricating oil tank 5 is sucked into the cylinder body 3 through the oil inlet pipe 101, waiting for the next lubrication.

[0024] Embodiment three:

[0025] Further references Figure 1-5Compared with the second embodiment, in this embodiment, an alarm device 6 is fixedly connected to the upper end of the cylinder body 3, and a proximity switch is arranged at one end of the alarm device 6 close to the cylinder body 3. The cleaning mechanism consists of an air valve 4, an air outlet pipe 401, a connecting piece 402, a rotating shaft 302, and five air jet brushes 403. The air valve 4 is fixedly connected to the outer wall of the valve body 1, and the air outlet pipe 401 runs through the valve body 1. One end of the air outlet pipe 401 is fixedly connected to the air valve 4 and the other end is fixedly connected to the connecting piece 402. The connecting piece 402 is rotatably connected to the rotating shaft 302. Five air jet brushes 403 are fixedly connected to the axial outer wall of the rotating shaft 302 at equal intervals. The rotating shaft 302 is hollow, and the interior of the air jet brush 403 is hollow. The air jet brush 403 is connected to the rotating shaft 302. The five air jet brushes 403 are provided with air jet holes 404 densely distributed at equal intervals. The rotating shaft 302 runs through the rotating connection filter plate 301, five cleaning brushes 303 are fixedly connected at equal intervals on one end of the rotating shaft 302 away from the connecting piece 402, the scraping surfaces of the five cleaning brushes 303 are precisely fitted with the filter plate 301, and the five cleaning brushes 303 are respectively fixedly connected with scraper rods 304, the scraping surfaces of the scraper rods 304 are tightly fitted with the inner wall of the valve body 1, and the scraping surfaces of the scraper rods are provided with chamfers to prevent the surface of the scraper rods 304 from scratching the inner wall of the valve body 1. It should be noted that the opening angle of the air jet hole 404 is an oblique opening, and the scraping surfaces of the air jet brush 403 and the cleaning brush 303 both have guide bevels. At the same time, the material of the air jet brush 403 and the cleaning brush 303 is copper, which can break up crystals while ensuring that the surface of the filter plate 301 will not be easily damaged, causing the surface of the filter plate 301 to be more easily crystallized. The air valve 4 is connected to high-pressure air, so that the high-pressure gas can be circulated to clean the filter plate 301 during use.

[0026] In this embodiment, when a blockage occurs in the valve, the piston 202 is lifted and displaced by the fluid. When the piston 202 moves, it pushes the piston rod 203 to move. When the piston rod 203 pushes the alarm device 6 at the upper end of the cylinder body 3, the proximity switch is triggered, the air valve 4 opens, and the high-pressure gas enters the air outlet pipe 401 through the air valve 4, and at the same time passes through the connecting piece 402 and the rotating shaft 302. Because the rotating shaft 302 is connected to the air jet brush 403, the gas is ejected through the air jet hole 404 of the air jet brush 403 to clean the filter plate 301. At the same time, because the air jet The hole 404 is opened at an oblique angle. At this time, the high-pressure gas ejected from the jet hole 404 will generate a reverse thrust to push the jet brush 403 to rotate and clean the inner surface of the filter plate 301. At the same time, when the jet brush 403 rotates, it will drive the rotating shaft 302 to rotate. When the rotating shaft 302 rotates, it will drive the cleaning brush 303 to rotate. When the cleaning brush 303 rotates, it will clean the outer surface of the filter plate 301. At the same time, when the cleaning brush 303 rotates, it will synchronously drive the scraper rod 304 to rotate. When the scraper rod 304 rotates, it will clean the condensed crystals on the inner wall of the valve body 1 to avoid blockage inside the valve body 1.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hard-sealed high-pressure welded ball valve, comprising a valve body (1), characterized in that: The upper end of the valve body (1) is fixedly connected to a hydraulic control valve (2), the inner wall of the hydraulic control valve (2) is provided with a lubrication groove (601), the hydraulic control valve (2) is rotatably connected to a rotating rod (8), one end of the rotating rod (8) away from the hydraulic control valve (2) is fixedly connected to a spherical valve core (7), both end openings of the valve body (1) are respectively provided with trumpet grooves (501), the trumpet grooves (501) at both ends are arranged in a mirror image, the inner wall of the valve body (1) is provided with two scraper rings (9) in a mirror image, the two scraper rings (9) are respectively arranged on both sides of the spherical valve core (7), a cleaning mechanism for cleaning chemical crystals is arranged in the valve body (1), and a lubrication mechanism for lubricating the rotating rod (8) is arranged in the valve body (1).

2. A hard-sealed high-pressure welded ball valve according to claim 1, characterized in that: The lubricating mechanism comprises a cylinder body (3), a piston (202), a piston rod (203), a return spring (204), a lubricating oil tank (5), an oil inlet pipe (101), and a lubricating pipe (102); the lubricating oil tank (5) is fixedly connected to the outer wall of the valve body (1); the cylinder body (3) is fixedly connected to the axial outer wall of the valve body (1); a groove (201) is formed on the valve body (1); the groove (201) is communicated with the cylinder body (3); the piston (202) is slidably connected to the inner wall of the cylinder body (3); and the piston rod (203) is connected to the inner wall of the cylinder body (3). One end of the return spring (204) is fixedly connected to the piston (202) and the other end thereof passes through the cylinder body (3) for sliding connection; the return spring (204) is sleeved on the outer wall of the piston rod (203); one end of the return spring (204) is fixedly connected to the cylinder body (3) and the other end thereof is fixedly connected to the piston (202); one end of the oil inlet pipe (101) is fixedly connected to the cylinder body (3) and the other end thereof is fixedly connected to the lubricating oil tank (5); one end of the lubricating pipe (102) is fixedly connected to the cylinder body (3) and the other end thereof passes through the hydraulic control valve (2) and is in communication with the lubricating groove (601).

3. A hard-sealed high-pressure welded ball valve according to claim 2, characterized in that: An alarm device (6) is fixedly connected to the upper end of the cylinder body (3), and a proximity switch is provided at one end of the alarm device (6) close to the cylinder body (3).

4. A hard-seal high-pressure welded ball valve according to claim 1, characterized in that: A filter plate (301) is arranged in the valve body (1), and a plurality of densely distributed filter holes are provided on the filter plate (301).

5. A hard-seal high-pressure welded ball valve according to claim 4, characterized in that: The cleaning mechanism comprises an air valve (4), an air outlet pipe (401), a connecting piece (402), a rotating shaft (302), and five air jet brushes (403); the air valve (4) is fixedly connected to the outer wall of the valve body (1); the air outlet pipe (401) passes through the valve body (1); one end of the air outlet pipe (401) is fixedly connected to the air valve (4) and the other end is fixedly connected to the connecting piece (402); the connecting piece (402) is rotatably connected to the rotating shaft (302); the five air jet brushes (403) are fixedly connected to the axial outer wall of the rotating shaft (302) at equal intervals; the rotating shaft (302) is hollow; the interior of the air jet brush (403) is hollow; the air jet brush (403) is connected to the rotating shaft (302); the five air jet brushes (403) are provided with air jet holes (404) densely distributed at equal intervals; and the rotating shaft (302) passes through and is rotatably connected to the filter plate (301).

6. A hard-seal high-pressure welded ball valve according to claim 5, characterized in that: Five cleaning brushes (303) are fixedly connected at equal intervals to one end of the rotating shaft (302) away from the connecting member (402), and the scraping surfaces of the five cleaning brushes (303) are precisely fitted to the filter plate (301).

7. A hard-seal high-pressure welded ball valve according to claim 6, characterized in that: The five cleaning brushes (303) are respectively fixedly connected to a scraper rod (304); the scraping surface of the scraper rod (304) is tightly fitted to the inner wall of the valve body (1); and the scraping surface of the scraper rod is provided with a rounded corner to prevent the surface of the scraper rod (304) from scratching the inner wall of the valve body (1).

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