Slag locking ball valve for coal chemical industry and using method of slag locking ball valve

Abstract

The invention discloses a slag locking ball valve for coal chemical industry and a using method thereof. The slag locking ball valve comprises a valve body, a ball core and a valve rod. A middle cavity of the valve body is sealed through a valve cover installed on the valve body, the lower end of the valve rod is connected with a ball core located in the middle cavity and drives the ball core to rotate, and the lower end of the ball core is connected with a positioning shaft. The lower part of the middle cavity is of a hemispherical structure; the supporting seat is positioned in the middle cavity and is rotationally connected to the positioning shaft; the scrapers are circumferentially arranged on the supporting seat and are impacted by fluid to drive the supporting seat to rotate, and the blade contour of each scraper is consistent with the lower part of the middle cavity and is close to the bottom wall of the lower part of the middle cavity; the positioning shaft is provided with a hole group, one end of the hole group is connected in the middle cavity and close to the scraper, and the other end of the hole group is connected with the deslagging pipeline. Slag deposited at the bottom of the middle cavity can be scraped, and the situation that due to the fact that the slag adheres to the bottom of the middle cavity and is difficult to remove, the middle cavity of the valve body is blocked, and opening and closing operation and sealing performance of the valve are affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a slag-locking ball valve for coal chemical industry and a use method thereof. Background Art

[0002] The slag lock ball valve is suitable for various pipelines to cut off or connect the fluid medium in the pipeline. It is often made of special materials such as sprayed tungsten carbide to improve the anti-brushing, wear resistance and corrosion resistance. It is particularly suitable for harsh working conditions containing solid particle media, such as slurry, coal powder, ash and slag;

[0003] During the use of the slag lock ball valve in coal chemical industry, the valve body channel is opened and closed mainly by the valve stem driving the ball core to rotate. Especially during the opening and closing process, part of the slag liquid mixture will be trapped in the middle cavity of the valve body. When it is opened or closed for a long time, the slag in the liquid will accumulate and precipitate, which is not easy to discharge, or adhere to the bottom of the middle cavity and is difficult to remove, thus causing the valve body middle cavity to be blocked and seriously affecting the valve's switching operation and sealing performance;

[0004] Some slag lock ball valves are based on ball valves and add back-blowing ash, slag, and slurry components. For example, the Chinese utility model patent with publication number CN212959950U: A self-cleaning slag system for the inner cavity of a ball valve for powder slag, its disclosure content: The top and bottom of the double-seat valve are respectively provided with a water inlet / air pipe and a water outlet / air pipe, and the water inlet / air pipe and the water outlet / air pipe are respectively provided with a slag cleaning inlet control valve and a slag discharge outlet control valve. By inletting water through the water inlet pipe and outlet water through the water outlet pipe, the inner cavity of the valve can be flushed and cleaned to ensure the cleanliness of the inner cavity of the valve body, which can increase the overall service life of the valve and thus improve work efficiency;

[0005] The disclosed technical content is to clean the slag by flushing, but the slag that has been accumulated and precipitated for a long time is prone to scaling, coking, adhesion and the like. The medium flushing method is difficult to ensure that the slag can be separated from the inner wall at the bottom of the middle cavity, and its effect is limited. Summary of the invention

[0006] The object of the present invention is to provide a slag lock ball valve for coal chemical industry, which can scrape the slag deposited on the bottom of the middle cavity to avoid the slag adhering to the bottom of the middle cavity and being difficult to remove, thereby causing blockage of the valve body middle cavity and affecting the valve's switching operation and sealing performance.

[0007] To achieve the above purpose, the present invention provides a slag lock ball valve for coal chemical industry, comprising:

[0008] Valve body, ball core, valve stem;

[0009] The middle cavity of the valve body is sealed by a valve cover installed on the valve body, the lower end of the valve stem is connected to the ball core located in the middle cavity and drives the ball core to rotate, and the lower end of the ball core is connected to the positioning shaft and is driven to rotate to open and close the channel of the valve body;

[0010] The lower part of the middle cavity is a hemispherical structure;

[0011] Also includes:

[0012] A support seat is located in the middle cavity and is rotatably connected to the positioning shaft;

[0013] A plurality of scrapers are arranged circumferentially on the support seat and driven to rotate by the impact of the fluid. The blade profile of each scraper is consistent with the lower part of the middle cavity and close to the bottom wall of the lower part of the middle cavity.

[0014] Among them, a hole group is provided on the positioning shaft, one end of the hole group is connected to the middle cavity and close to the scraper, and the other end is connected to the slag discharge pipeline.

[0015] In some examples of the present invention, the support seat is provided with first holes arranged up and down, and the first holes may be provided with positioning grooves;

[0016] One end of the scraper is fixed on the first rod, and the other end passes through the positioning groove and is located outside. The first rod is slidably located in the first hole and is acted upon by downward elastic force.

[0017] In some examples of the present invention, a radially arranged second hole is provided on the support seat above the first hole;

[0018] A second rod is slidably disposed in the second hole, one end of the second rod is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the upper end of the first rod;

[0019] The second rod is subjected to an elastic force radially toward the axis of the positioning shaft.

[0020] In some examples of the present invention, a third elastic member is disposed in the first hole, and a fourth elastic member is disposed in the second hole;

[0021] Wherein, two ends of the third elastic member are in contact with the lower end of the first rod and the bottom end of the second hole respectively;

[0022] Two ends of the fourth elastic member are in contact with the second rod and the inner wall of the first hole respectively.

[0023] In some examples of the present invention, the positioning shaft is provided with a slag discharge hole located in the middle cavity, and a blind cavity arranged axially and connected to the slag discharge hole;

[0024] There are multiple slag discharge holes, which are evenly arranged circumferentially, and the lower end of each slag discharge hole is not higher than the tangent line of the lowest position of the bottom wall of the middle cavity;

[0025] The blind cavity is connected to the slag discharge pipeline.

[0026] In some examples of the present invention, the valve body has an output hole at the upstream and an input hole at the lower part of the middle cavity;

[0027] The output hole is connected to the input hole via a first pipeline;

[0028] The first pipeline is provided with a pressurizer and a pressure regulating component;

[0029] The axis of the input hole is parallel to the axis of the valve body channel and is offset and arranged toward the scraper; the pressure regulating component closes the first pipeline and opens it when the pressure in the first pipeline reaches a certain level.

[0030] In some examples of the present invention, a filter plate is provided upstream of the valve body and at the output hole.

[0031] In some examples of the present invention, relative to the pressurizer, the pressure regulating component is close to the middle cavity of the valve body and includes:

[0032] A pressure regulating pipe having a diameter greater than that of the first pipeline, and a pressure regulating ball and a second elastic member located in the pressure regulating pipe;

[0033] The pressure regulating ball is located at the liquid inlet end of the pressure regulating tube, and the liquid inlet end is sealed by the elastic force of the second elastic member.

[0034] In some examples of the present invention, under the elastic force of the first elastic member, the valve seat in the valve body moves axially to make sealing contact with the surface of the ball core;

[0035] Wherein, an inner cavity with a changing volume is formed between the peripheral side of the valve seat near the downstream of the valve body and the valve body; when the volume of the inner cavity increases, the valve seat moves away from the ball core and compresses the first elastic member;

[0036] The output end of the first pipeline is connected to the input hole and the inner cavity respectively.

[0037] The present invention also aims to provide a method for using a slag-locking ball valve for coal chemical industry. When the ball core is opened and closed, the scraper rotates due to the impact of the fluid and can scrape the slag deposited at the bottom of the middle cavity while rotating, so as to avoid the slag adhering to the bottom of the middle cavity and being difficult to remove, causing blockage in the middle cavity of the valve body and affecting the switching operation and sealing performance of the valve.

[0038] A method for using a slag lock ball valve for coal chemical industry, specifically comprising the following steps:

[0039] S1, the valve stem drives the ball core to rotate, and the ball core opens and closes the valve body channel. During the opening and closing process, the fluid upstream of the valve body enters the valve body at a certain pressure;

[0040] The scraper rotates under the impact of the fluid, and scrapes off the slag deposited or adhered to the lower part of the middle cavity while rotating. The scraped slag is discharged from the hole group close to the scraper;

[0041] S2, when it is necessary to manually clean the slag adhered to the bottom wall of the middle cavity, the pressurizer is turned on, and when the pressure in the first pipeline reaches a certain range and the pressure regulating component is in an open state, the fluid enters the middle cavity from the upstream of the valve body through the first pipeline, and is biasedly ejected from the input hole to act on the scraper, so that the scraper rotates to clean the bottom wall of the middle cavity, and the slag is discharged from the slag discharge pipeline;

[0042] S3, when the fluid impact is large and the scraper drives the support seat to rotate at a faster speed, under the action of centrifugal force, the second rod in the first hole moves radially outward, and drives the first rod to move downward in the first hole through the connecting rod. At this time, the scraper blade can reduce the distance to the bottom wall of the middle cavity, and can remove the strongly adhered slag at a higher speed.

[0043] Compared with the prior art, the slag lock ball valve for coal chemical industry is installed on the positioning shaft through the support seat, and the scraper is installed on the support seat. When the ball core is opened and closed, the scraper rotates under the impact of the fluid and can scrape the slag deposited on the bottom of the middle cavity while rotating, so as to avoid the slag adhering to the bottom of the middle cavity and being difficult to remove, causing the middle cavity of the valve body to be blocked, affecting the switch operation and sealing performance of the valve;

[0044] Since one end of the connecting rod is rotatably connected to the second rod that moves radially, and the other end is rotatably connected to the first rod that moves up and down, under the action of centrifugal force, the second rod in the first hole moves radially outward, and drives the first rod to move downward in the first hole through the connecting rod. At this time, the scraper blade can reduce the distance to the bottom wall of the middle cavity, and the scraper can remove the strongly adherent slag at a higher speed, avoiding the problem that the strongly adherent slag cannot be removed;

[0045] Since the output hole and the input hole on the valve body are connected through the first pipeline, a pressure booster and a pressure regulating component are provided on the first pipeline. When the pressure in the first pipeline reaches a certain range, the pressure regulating component is in an open state at the same time, and the fluid enters the middle cavity from the upstream of the valve body through the first pipeline, and is biasedly ejected through the input hole to act on the scraper, so that the scraper rotates to clean the bottom wall of the middle cavity. Therefore, by controlling the opening and closing of the pressure booster, the bottom wall of the middle cavity can be actively cleaned, thereby avoiding the situation where the scraper cannot remove the slag with strong adhesion due to short rotation time and limited rotation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is an overall schematic diagram of the present invention;

[0047] Figure 2 yes Figure 1 A magnified view of position A in the middle;

[0048] Figure 3 It is a schematic diagram of an overall horizontal section of the present invention;

[0049] Figure 4 is a schematic diagram of the support base in the present invention;

[0050] Figure 5 It is a schematic diagram of the assembly between the scraper, the support seat and the positioning shaft in the present invention;

[0051] Figure 6 It is a schematic diagram of the scraper and positioning shaft in the present invention;

[0052] Figure 7 It is a partial schematic diagram of the scraper in the present invention;

[0053] Figure 8 is a top view of the position of the input hole in the present invention;

[0054] Fig. 9 yes Figure 1 A magnified view of position B in the middle;

[0055] Fig.10 It is a front view of the pressure regulating component in the present invention;

[0056] In the figure: 11, valve body, 12, ball core, 13, valve cover, 14, valve stem, 15, valve seat, 16, inner cavity, 17, first elastic member, 18, output hole, 19, input hole;

[0057] 20. a pressure regulating component, 21. a pressure regulating tube, 22. a pressure regulating ball, 23. a second elastic member;

[0058] 30. support seat, 31. first hole, 32. second hole, 33. positioning groove;

[0059] 41. scraper, 42. first rod, 43. connecting rod, 44. second rod, 45. third elastic member, 46. fourth elastic member;

[0060] 50. Positioning shaft, 51. Slag discharge hole, 52. Blind cavity, 53. Slag discharge pipeline;

[0061] 60. Pressurizer. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0064] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention is a slag lock ball valve for coal chemical industry, comprising:

[0065] Valve body 11, ball core 12, valve stem 14;

[0066] The middle cavity of the valve body 11 is sealed by a valve cover 13 installed on the valve body 11, the lower end of the valve stem 14 is connected to the ball core 12 located in the middle cavity and drives the ball core 12 to rotate, and the lower end of the ball core 12 is connected to the positioning shaft 50 and is driven to rotate to open and close the channel of the valve body 11;

[0067] The lower part of the middle cavity is a hemispherical structure;

[0068] The slag lock ball valve also includes:

[0069] The support seat 30 is located in the middle cavity and is rotatably connected to the positioning shaft 50;

[0070] A plurality of scrapers 41 are circumferentially arranged on the support seat 30 and driven to rotate by the impact of the fluid. The blade profile of each scraper 41 is consistent with the lower part of the middle cavity and close to the bottom wall of the lower part of the middle cavity.

[0071] Among them, a hole group is provided on the positioning shaft 50, one end of the hole group is connected to the middle cavity and close to the scraper 41, and the other end is connected to the slag discharge pipeline 53;

[0072] Specifically, the valve body 11, the ball core 12, the valve stem 14, and the valve cover 13 are the basic components of the existing ball valve, that is, the valve body 11 is provided with a valve seat 15 and a middle cavity for placing the ball core 12, the ball core 12 contacts the valve seat 15 for opening and closing, so that the channel on the ball core 12 is perpendicular or aligned with the pipeline axis, completing the interception and circulation of the fluid, the upper end of the ball core 12 is connected to the valve stem 14 to be driven to rotate, and the lower end is connected to the positioning shaft 50 to maintain the stability of the ball core 12 when rotating, and the positioning shaft 50 is rotatably installed on the valve body 11 through a bearing, and the above are all existing structures, which will not be further elaborated here;

[0073] The lower part of the middle cavity is a hemispherical structure, so as to facilitate the axial rotation of the scraper 41 and ensure that a large area of ​​fluid impacts the scraper 41 with a certain pressure;

[0074] The support seat 30 is rotatably mounted on the positioning shaft 50 through a bearing, that is, the support seat 30 is located between the lower part of the middle cavity and the lower part of the ball core 12; the number of scrapers 41 can be 2-6, and they are evenly arranged axially, and the blade of each scraper 41 faces downward and is consistent with the lower part of the middle cavity, that is, the lower part of the scraper 41 is an arc structure, and the interval with the bottom wall of the middle cavity can be 0.1-20mm;

[0075] When a slag lock ball valve for coal chemical industry is in use, the valve stem 14 drives the ball core 12 to rotate, for example, from the closed state to the open state, the liquid upstream of the valve body 11 enters the valve body 11 and flows out from the downstream, and when the liquid enters the middle cavity with a certain pressure, the scraper 41 rotates under the impact of the fluid, and the slag deposited or adhered in the lower part of the middle cavity is scraped off during the rotation process, and the scraped slag can be discharged from the hole group close to the scraper 41, that is, the slag is discharged from the hole group and the slag discharge pipeline 53, and can also be discharged from the downstream of the valve body 11 along the fluid; when the slag scraping process is required, the operator can delay for a period of time during the opening and closing process of the ball core 12 to ensure that the scraper 41 is rotated by the fluid for a longer time to improve the cleaning effect; it is explained that during the opening and closing process of the ball valve, the fluid does not directly go from upstream to downstream along the channel axis of the valve body 11, but gradually enters from one side as the ball valve rotates, that is, it can act on the scraper 41 to force it to rotate;

[0076] The slag-locking ball valve for coal chemical industry is installed on the positioning shaft 50 through the support seat 30, and the scraper 41 is installed on the support seat 30. When the ball core 12 is opened and closed, the scraper 41 rotates due to the impact of the fluid and can scrape the slag deposited at the bottom of the middle cavity while rotating, so as to avoid the slag adhering to the bottom of the middle cavity and being difficult to remove, causing the middle cavity of the valve body 11 to be blocked, affecting the switching operation and sealing performance of the valve.

[0077] In some examples of the present invention, Figure 4 , Figure 7 As shown, the support seat 30 is provided with a coaxially arranged first hole 31, and the first hole 31 may be provided with a positioning groove 33;

[0078] One end of the scraper 41 is fixed on the first rod 42, and the other end passes through the positioning slot 33 and is located outside. The first rod 42 is slidably located in the first hole 31 and is acted upon by a downward elastic force.

[0079] Specifically, a positioning groove 33 is provided on the first hole 31, that is, the first rod 42 connected to the scraper 41 is located in the first hole 31, and the scraper 41 passes through the positioning groove 33 and is located outside. On the one hand, the scraper 41 can slide in the first hole 31, and on the other hand, the scraper 41 is limited by the positioning groove 33, so that it can drive the support seat 30 to rotate when impacted by the fluid;

[0080] When the slag adheres stubbornly in the middle cavity and the scraper 41 cannot be scraped off in time by rotating, the scraper 41 can move upward due to resistance, so that the scraper 41 can smoothly pass through the slag with strong adhesion, avoiding damage to the scraper 41. After the offset and under the action of elastic force, the scraper 41 returns to the initial position.

[0081] In some examples of the present invention, Figures 4 to 7 As shown, a radially arranged second hole 32 is provided on the support seat 30 and is located above the first hole 31;

[0082] A second rod 44 slides in the second hole 32, one end of the second rod 44 is rotatably connected to one end of the connecting rod 43, and the other end of the connecting rod 43 is rotatably connected to the upper end of the first rod 42;

[0083] Wherein, the second rod 44 is subjected to a radially inward elastic force;

[0084] Specifically, the number of the second holes 32 and the first holes 31 is consistent with the number of the scrapers 41 and corresponds to each other;

[0085] Due to the influence of the processing and assembly of the scraper 41 and the actual sedimentation and accumulation process of the slag, the scraper 41 cannot fit closely to the bottom wall of the middle cavity, which makes it more difficult to remove the slag that is closer to the bottom wall of the middle cavity. When the scraper 41 rotates at a low speed after being impacted, it is easy to cause the scraper 41 to be unable to rotate if the scraper 41 is directly applied to the slag with strong adhesion.

[0086] In the initial state, the first rod 42 is subjected to downward elastic force, and the second rod 44 is subjected to radial inward elastic force, so that the first rod 42, the connecting rod 43, and the second rod 44 are in a stable state, and there is a certain distance between the blade of the scraper 41 and the bottom wall of the middle cavity; for example, 2 mm;

[0087] When the support seat 30 is driven at a high speed, the support seat 30 rotates accordingly. Under the action of centrifugal force, the second rod 44 in the first hole 31 moves radially outward, and drives the first rod 42 to move downward in the first hole 31 through the connecting rod 43. At this time, the distance between the blade of the scraper 41 and the bottom wall of the middle cavity can be reduced to, for example, 1 mm. The scraper 41 can remove the strongly adhered slag at a higher speed.

[0088] In some examples of the present invention, Figures 5 to 7 As shown, a third elastic member 45 is disposed in the first hole 31, and a fourth elastic member 46 is disposed in the second hole 32;

[0089] The two ends of the third elastic member 45 are in contact with the lower end of the first rod 42 and the bottom end of the second hole 32 respectively;

[0090] Two ends of the fourth elastic member 46 are in contact with the second rod 44 and the inner wall of the first hole 31 respectively;

[0091] Specifically, the third elastic member 45 is located in the first hole 31, and through the first rod 42 and the connecting rod 43, the second rod 44 can have a radially inward elastic force; the fourth elastic member 46 is located in the second hole 32, and through the second rod 44 and the connecting rod 43, the first rod 42 can be subjected to a downward elastic force;

[0092] Initially, under the action of the third elastic member 45 and the fourth elastic member 46, the first rod 42, the connecting rod 43, and the second rod 44 are connected to each other to achieve balance, so that the blade of the scraper 41 is close to the bottom wall of the middle cavity.

[0093] In some examples of the present invention, Figure 1 , Figure 6 As shown, the positioning shaft 50 is provided with a slag discharge hole 51 located in the middle cavity, and a blind cavity 52 arranged axially and connected to the slag discharge hole 51;

[0094] There are multiple slag discharge holes 51, which are evenly arranged in the circumferential direction, and the lower end of each slag discharge hole 51 is not higher than the tangent line of the lowest position of the bottom wall of the middle cavity;

[0095] The blind cavity 52 is connected to the slag discharge pipeline 53;

[0096] Specifically, the number of the slag discharge holes 51 may be three or four, and each slag discharge hole 51 is an arc-shaped hole arranged circumferentially and has a certain height from top to bottom;

[0097] The slag removed by the scraper 41 can be discharged from the slag discharge pipeline 53 along the lower part of the middle cavity through the slag discharge hole 51 and the blind cavity 52; the lower end of each slag discharge hole 51 is not higher than the tangent of the lowest position of the bottom wall of the middle cavity, which can facilitate the smooth discharge of the slag and avoid the dead point between the bottom wall of the middle cavity and the positioning shaft 50, that is, the slag discharge hole 51 is located at a high position, and the slag after removal cannot be discharged in time.

[0098] In some examples of the present invention, Figure 1 , Figure 3 , Figure 8 As shown, the valve body 11 is provided with an output hole 18 upstream and an input hole 19 at the lower part of the middle cavity;

[0099] The output hole 18 is connected to the input hole 19 via a first pipeline;

[0100] The first pipeline is provided with a pressurizer 60 and a pressure regulating component 20 for opening the first pipeline after a certain pressure is applied;

[0101] The axis of the input hole 19 is parallel to the axis of the passage of the valve body 11 and is arranged offset toward the scraper 41;

[0102] Specifically, during the use of the coal chemical slag lock ball valve, the scraper 41 is driven to rotate by the fluid entering the middle cavity, which has the following problems: 1. The opening and closing process of the ball core 12 is relatively short. When the scraper 41 is not promptly responded to the fluid impact, the cleaning effect is easily reduced, and the cleaning time is limited; 2. The scraper 41 mainly relies on the impact of the fluid. When the ball core 12 is opened, the upstream liquid pressure is small, and the fluid impact on the scraper 41 is reduced, so that the speed of the scraper 41 is limited and the slag with strong adhesion cannot be removed; 3. The fluid enters the middle cavity from the upstream of the valve body 11. Due to the structural restrictions, there may be turbulence in the fluid, which weakens the impact on the scraper 41;

[0103] In this example, the output hole 18 leads the upstream liquid out, that is, the same medium is input into the middle cavity, to avoid the influence of the foreign medium on the components of the transported liquid. For example, when gas is introduced, the gas will enter the pipeline with the fluid to form bubbles or cavitations and block the flow path of the liquid, or cause turbulence and eddy currents of the liquid to affect the transport effect.

[0104] The pressurizer 60 may be a pressurizing pump, which increases the fluid pressure in the first pipeline so that the fluid can enter the input hole 19 at a certain pressure. The pressure regulating component 20 is used to withstand a certain pressure, that is, in the initial state, the pressure regulating component 20 closes the first pipeline, and when the pressure in the first pipeline reaches a certain range, the pressure regulating component 20 opens the first pipeline;

[0105] The axis of the input hole 19 is offset from the axis of the valve body 11 channel and faces the scraper 41, which can ensure that the fluid directly acts on the scraper 41 after being discharged from the input hole 19, driving the scraper 41 to rotate;

[0106] When it is necessary to manually clean the slag adhered to the bottom wall of the middle cavity, the pressurizer 60 can be turned on. When the pressure in the first pipeline reaches a certain range, the pressure regulating component 20 is in an open state at the same time, and the fluid enters the middle cavity through the first pipeline from the upstream of the valve body 11, and is biasedly ejected through the input hole 19 to act on the scraper 41, so that the scraper 41 rotates to clean the slag from the bottom wall of the middle cavity, and the slag is discharged from the slag discharge pipeline 53; this example can actively clean the slag from the bottom wall of the middle cavity by controlling the opening and closing of the pressurizer 60, thereby avoiding the situation where the scraper 41 rotates for a short time and the rotation speed is limited, making it impossible to remove the slag with strong adhesion.

[0107] Furthermore, a filter plate is provided upstream of the valve body 11 and at the output hole 18;

[0108] In some examples of the present invention, Fig.10 As shown, relative to the pressurizer 60, the pressure regulating component 20 is close to the middle cavity of the valve body 11 and includes:

[0109] A pressure regulating pipe 21 having a diameter larger than that of the first pipe, and a pressure regulating ball 23 and a second elastic member 23 located in the pressure regulating pipe 21;

[0110] The pressure regulating ball 23 is located at the liquid inlet end of the pressure regulating tube 21 and is sealed by the elastic force of the second elastic member 23 ;

[0111] Specifically, in the initial state, under the action of the second elastic member 23, the pressure-regulating ball 23 closes the liquid inlet end of the pressure-regulating tube 21. When the pressurizer 60 is started, the pressure near the liquid inlet end of the first pipeline increases, pushing the pressure-regulating ball 23 to move and compress the second elastic member 23, that is, the pressure-regulating ball 23 opens the liquid inlet end of the pressure-regulating tube 21.

[0112] In some examples of the present invention, Fig. 9 As shown, under the elastic force of the first elastic member 17, the valve seat 15 in the valve body 11 moves axially to make sealing contact with the surface of the ball core 12;

[0113] An inner cavity 16 with a changing volume is formed between the peripheral side of the valve seat 15 near the downstream of the valve body 11 and the valve body 11; when the volume of the inner cavity 16 increases, the valve seat 15 moves away from the ball core 12 and compresses the first elastic member 17;

[0114] The output end of the first pipeline is connected to the input hole 19 and the inner cavity 16 respectively;

[0115] Specifically, a valve seat 15 is provided in the valve body 11, and the valve seat 15 is located on both sides of the ball core 12, and a first elastic member 17 is provided thereon. Under the action of the first elastic member 17, the valve seat 15 moves axially to seal the ball core 12, which is a common structure of a ball valve and will not be further described here;

[0116] The output end of the first pipeline is connected to the input hole 19 and the inner cavity 16 respectively, that is, when the pressurizer 60 is started and the pressure regulating component 20 is opened, the liquid upstream of the valve body 11 enters the middle cavity from the first pipeline to act on the scraper 41 to rotate and clear the slag, and enters the inner cavity 16 to move the valve seat 15 away from the ball core 12 and compress the first elastic member 17. At this time, the valve seat 15 near the downstream of the valve body 11 is not in contact with the ball core 12, that is, the downstream of the valve body 11 is connected to the middle cavity, and the slag removed by the scraper 41 can not only be discharged from the slag discharge pipeline 53, but also can directly enter the downstream of the valve body 11 for discharge.

[0117] When the slag lock ball valve for coal chemical industry is used, the following steps are specifically included:

[0118] S1, the valve stem 14 drives the ball core 12 to rotate, and the ball core 12 opens and closes the passage of the valve body 11. During the opening and closing process, the fluid upstream of the valve body 11 enters the valve body 11 at a certain pressure;

[0119] The scraper 41 rotates under the impact of the fluid, and scrapes off the slag deposited or adhered in the lower part of the middle cavity while rotating. The scraped slag can be discharged from the hole group close to the scraper 41;

[0120] S2, when it is necessary to manually clean the slag adhered to the bottom wall of the middle cavity, the pressurizer 60 is turned on, and when the pressure in the first pipeline reaches a certain range and the pressure regulating component 20 is in an open state, the fluid enters the middle cavity from the upstream of the valve body 11 through the first pipeline, and is biasedly ejected from the input hole 19 to act on the scraper 41, so that the scraper 41 rotates to clean the bottom wall of the middle cavity, and the slag is discharged from the slag discharge pipeline 53;

[0121] S3, when the fluid impact is large and the scraper 41 drives the support seat 30 to rotate at a faster speed, under the action of centrifugal force, the second rod 44 in the first hole 31 moves radially outward, and drives the first rod 42 to move downward in the first hole 31 through the connecting rod 43. At this time, the blade of the scraper 41 can reduce the distance to the bottom wall of the middle cavity, and can remove the strongly adhered slag at a higher speed.

[0122] An exemplary implementation of a slag lock ball valve for coal chemical industry proposed in the present invention is described in detail above with reference to a preferred embodiment. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined in various ways without exceeding the protection scope of the present invention, which is determined by the attached claims.

Claims

1. A slag lock ball valve for coal chemical industry, comprising: Valve body (11), ball core (12), valve stem (14); The middle cavity of the valve body (11) is sealed by a valve cover (13) mounted on the valve body (11); the lower end of the valve stem (14) is connected to a ball core (12) located in the middle cavity and drives the ball core (12) to rotate; the lower end of the ball core (12) is connected to a positioning shaft (50) and is driven to rotate to open and close the channel of the valve body (11); It is characterized in that The lower part of the middle cavity is a hemispherical structure; Also includes: A support seat (30) is located in the middle cavity and is rotatably connected to the positioning shaft (50); A plurality of scrapers (41) are circumferentially arranged on the support seat (30) and driven to rotate by the impact of the fluid, wherein the blade profile of each scraper (41) is consistent with the lower part of the middle cavity and close to the bottom wall of the lower part of the middle cavity; A hole group is provided on the positioning shaft (50), one end of the hole group is connected to the middle cavity and close to the scraper (41), and the other end is connected to the slag discharge pipeline (53).

2. A slag lock ball valve for coal chemical industry according to claim 1, characterized in that: The support seat (30) is provided with first holes (31) arranged up and down, and the first holes (31) may be provided with positioning grooves (33); One end of the scraper (41) is fixed on the first rod (42), and the other end passes through the positioning groove (33) and is located outside. The first rod (42) is slidably located in the first hole (31) and is acted upon by a downward elastic force.

3. A slag lock ball valve for coal chemical industry according to claim 2, characterized in that: A second hole (32) arranged radially is provided on the support seat (30) and is located above the first hole (31); A second rod (44) is slidably disposed in the second hole (32), one end of the second rod (44) is rotatably connected to one end of the connecting rod (43), and the other end of the connecting rod (43) is rotatably connected to the upper end of the first rod (42); The second rod (44) is subjected to an elastic force radially toward the axis of the positioning shaft (50).

4. A slag lock ball valve for coal chemical industry according to claim 3, characterized in that: A third elastic member (45) is disposed in the first hole (31), and a fourth elastic member (46) is disposed in the second hole (32); Wherein, two ends of the third elastic member (45) are in contact with the lower end of the first rod (42) and the bottom end of the second hole (32) respectively; Two ends of the fourth elastic member (46) are in contact with the second rod (44) and the inner wall of the first hole (31) respectively.

5. A slag lock ball valve for coal chemical industry according to any one of claims 1 to 4, characterized in that: The positioning shaft (50) is provided with a slag discharge hole (51) located in the middle cavity, and a blind cavity (52) arranged axially and communicating with the slag discharge hole (51); There are multiple slag discharge holes (51) which are evenly arranged in the circumferential direction, and the lower end of each slag discharge hole (51) is not higher than the tangent line of the lowest position of the bottom wall of the middle cavity; The blind cavity (52) is connected to the slag discharge pipeline (53).

6. A slag lock ball valve for coal chemical industry according to claim 2, characterized in that: The valve body (11) is provided with an output hole (18) at the upstream, and an input hole (19) at the lower part of the middle cavity; The output hole (18) and the input hole (19) are connected via a first pipeline; The first pipeline is provided with a pressurizer (60) and a pressure regulating component (20); The axis of the input hole (19) is parallel to the axis of the valve body (11) channel and is offset and arranged toward the scraper (41); the pressure regulating component (20) closes the first pipeline and opens it again when the pressure in the first pipeline reaches a certain level.

7. A slag lock ball valve for coal chemical industry according to claim 6, characterized in that: A filter plate is provided upstream of the valve body (11) and at the output hole (18).

8. A slag lock ball valve for coal chemical industry according to claim 6, characterized in that: Relative to the pressurizer (60), the pressure regulating component (20) is close to the middle cavity of the valve body (11) and includes: A pressure regulating pipe (21) having a diameter greater than that of the first pipeline, and a pressure regulating ball (23) and a second elastic member (23) located in the pressure regulating pipe (21); The pressure regulating ball (23) is located at the liquid inlet end of the pressure regulating tube (21), and the liquid inlet end is sealed by the elastic force of the second elastic member (23).

9. A slag lock ball valve for coal chemical industry according to claim 6, characterized in that: Under the elastic force of the first elastic member (17), the valve seat (15) in the valve body (11) moves axially to achieve sealing contact with the surface of the ball core (12); An inner cavity (16) with a changing volume is formed between the peripheral side of the valve seat (15) near the downstream of the valve body (11) and the valve body (11); when the volume of the inner cavity (16) increases, the valve seat (15) moves away from the ball core (12) and compresses the first elastic member (17); The output end of the first pipeline is connected to the input hole (19) and the inner cavity (16) respectively.

10. A method for using the slag lock ball valve for coal chemical industry according to claim 6, characterized in that: The specific steps include: S1, the valve stem (14) drives the ball core (12) to rotate, and the ball core (12) opens and closes the passage of the valve body (11). During the opening and closing process, the fluid upstream of the valve body (11) enters the valve body (11) at a certain pressure; The scraper (41) rotates under the impact of the fluid, and scrapes off the slag deposited or adhered to the lower part of the middle cavity while rotating, and the scraped slag is discharged from the hole group close to the scraper (41); S2, when it is necessary to manually clean the slag adhered to the bottom wall of the middle cavity, the pressurizer (60) is turned on, and when the pressure in the first pipeline reaches a certain range and the pressure regulating component (20) is in an open state, the fluid enters the middle cavity from the upstream of the valve body (11) through the first pipeline, and is biasedly ejected from the input hole (19) to act on the scraper (41), so that the scraper (41) rotates to clean the bottom wall of the middle cavity, and the slag is discharged from the slag discharge pipeline (53); S3, when the fluid impact is large and the scraper (41) drives the support seat (30) to rotate at a faster speed, under the action of centrifugal force, the second rod (44) in the first hole (31) moves radially outward and drives the first rod (42) to move downward in the first hole (31) through the connecting rod (43). At this time, the distance between the blade of the scraper (41) and the bottom wall of the middle cavity can be reduced, and the strongly adhered slag can be removed at a higher rotation speed.

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