A processing technique for tungsten carbide of a plug valve seal structure

Abstract

The application belongs to the technical field of faucet valve processing, and particularly relates to a tungsten carbide processing technology for a faucet valve sealing structure. The tungsten carbide coating formed by the shielding part and the valve plug surface in one body during spraying causes damage to the coating on the valve plug surface when the shielding part is disassembled, and affects the spraying quality. The following scheme is proposed, including base pretreatment, complete cleaning of the spraying surface by using alkaline cleaning liquid + mechanical treatment to remove surface oil stains and keep the surface clean; the spraying surface needs to be preheated before sand blasting to remove surface moisture and improve the bonding quality of the powder and the surface of the part, and the suitable preheating temperature of the base surface is 60-90 DEG C. The tungsten carbide processing technology for the faucet valve sealing structure has the effect of guaranteeing the spraying quality of the tungsten carbide coating. When spraying, the device can separate the coating of the base passage area from the coating of other parts before the spraying of the tungsten carbide coating is completed, so that damage to the coating after the spraying is completed is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of faucet valve processing, and particularly relates to a processing technology for a faucet valve sealing structure made of tungsten carbide. BACKGROUND

[0002] The faucet valve is a shut-off or plunger-shaped rotary valve, which is opened or closed by rotating 90 degrees to make the channel on the valve plug communicate with or separate from the channel on the valve body.

[0003] The shape of the valve plug can be cylindrical or conical. In the cylindrical valve plug, the channel is generally rectangular; and in the conical valve plug, the channel is trapezoidal. These shapes make the structure of the faucet valve light and compact. The faucet valve is most suitable for cutting off and connecting media and for flow splitting, but can also be used for throttling according to the properties and erosion resistance of the sealing surface.

[0004] The sealing structure of the faucet valve needs to be sprayed with tungsten carbide during processing to reduce the wear rate of the sealing surface and prolong the service life of the valve.

[0005] The existing sealing structure of the faucet valve needs to be shielded and protected when sprayed with tungsten carbide. However, the tungsten carbide will also be sprayed on the shielding component during spraying, so that the shielding component and the surface of the valve plug form an integrated tungsten carbide coating, which will cause damage to the coating on the surface of the valve plug when the shielding component is disassembled, thereby affecting the spraying quality. SUMMARY

[0006] The present application discloses a processing technology for a faucet valve sealing structure made of tungsten carbide, which aims to solve the technical problem that the existing sealing structure of the faucet valve needs to be shielded and protected when sprayed with tungsten carbide, and the tungsten carbide will also be sprayed on the shielding component during spraying, so that the shielding component and the surface of the valve plug form an integrated tungsten carbide coating, which will cause damage to the coating on the surface of the valve plug when the shielding component is disassembled, thereby affecting the spraying quality.

[0007] The processing technology for the faucet valve sealing structure made of tungsten carbide comprises the following steps:

[0008] S1, pretreatment of the base body, completely cleaning the spraying surface with an alkaline cleaning solution + mechanical treatment to remove surface oil and keep the surface clean;

[0009] S2, the spraying surface needs to be preheated before sandblasting to remove surface moisture and improve the bonding quality of the powder and the surface of the part. The suitable preheating temperature of the surface of the base body is 60-90 DEG C;

[0010] S3, sandblasting roughening, the surface roughness Ra of the ball is less than or equal to 0.4, the roundness is less than or equal to 0.03, and the roughness Ra of the valve seat sealing surface is less than or equal to 0.8;

[0011] S4, during spraying, the base body is arranged on the spraying equipment, the non-spraying surface is protected, and spraying is performed;

[0012] S5, a post-processing procedure, hole sealing treatment: a special hole sealing agent with high temperature resistance (> 850 DEG C) and corrosion resistance is used to penetrate the micro-pores of the coating layer, and the sealing surface of the cock valve is focused on hole sealing to improve the medium isolation performance;

[0013] S6, quality detection: the coating thickness (usually 0.2-0.5mm) and hardness (≥HV1200) are detected, and coating cracks and other defects are checked by ultrasonic or penetration detection.

[0014] In a preferred scheme, the spraying equipment comprises a machining base, a mounting seat is arranged on the machining base, a rotating sleeve frame is arranged in the mounting seat, an electric telescopic rod is fixedly connected to the inner wall of one side of the rotating sleeve frame, a fixing part is fixedly connected to the output end of the electric telescopic rod and the outer wall of one side of the machining base, the same valve plug base body is arranged between the two fixing parts, a base body channel is arranged on the valve plug base body, a coating separation module is arranged in the base body channel, and a fixing seat is fixedly connected to the top of the machining base; a protection positioning module is arranged on the fixing seat;

[0015] The coating separation module comprises an electromagnetic suction roller and two separation frames, and the two separation frames are located in the inside of the base body channel.

[0016] The protection positioning module comprises two positioning pieces.

[0017] In a preferred scheme, the coating separation module further comprises a fixed base, the fixed base is arranged in the inside of the base body channel, two telescopic springs are fixedly connected to the outer walls of the two sides of the fixed base, the same inner fixed frame is fixedly connected to one end of the two telescopic springs on the same side, and the inner walls of the two separation frames are fixedly connected to the outer walls of the two inner fixed frames.

[0018] In a preferred scheme, an installation rod piece is movably connected to each of the two inner fixed frames, a magnetic roller piece and a driven gear are fixedly connected to the outer wall of each of the two installation rod pieces, a servo motor is arranged on the inner wall of each of the two inner fixed frames, a drive gear is connected to the output shaft of each of the two servo motors through a shaft coupling, and the two drive gears are meshed with the two driven gears, respectively.

[0019] In a preferred scheme, a roller end blocking frame is fixedly connected to the outer wall of one side of each of the two separation frames, the two magnetic roller pieces are located in the inside of the two roller end blocking frames, respectively, and a lapping batten is arranged on each of the two roller end blocking frames, and the outer wall of each of the two lapping battens is in contact with the outer wall of each of the two magnetic roller pieces.

[0020] In a preferred scheme, the inside of the fixed base is provided with a mounting cavity, the inside of the mounting cavity is provided with a negative pressure pump, the output end of the negative pressure pump is fixedly connected with a communication pipe, the output end of the communication pipe is fixedly connected with a telescopic air bag, and the input end of the negative pressure pump is fixedly connected with two connecting pipes.

[0021] In a preferred scheme, the input end of each of the two connecting pipes is fixedly connected with a fixed suction disc, the two fixed suction discs are in contact with the inner walls on the two sides of the base channel, a circular hole is formed in the outer wall of one side of the fixed base, and the two circular holes are in communication with the inside of the mounting cavity, and one of the connecting pipes passes through the inside of the two circular holes.

[0022] In a preferred scheme, the processing base is provided with a movable base, the movable base is provided with an adjusting mechanism, the adjusting mechanism is provided with a tungsten carbide processing nozzle, and the processing base is provided with two electric push rods, and the output ends of the two electric push rods are fixedly connected with the outer wall of one side of the movable base.

[0023] In a preferred scheme, the protection positioning module further comprises an electric rod, the electric rod is arranged on the fixed seat, the output end of the electric rod is fixedly connected with an arc-shaped plate frame, the electromagnetic suction roller is arranged on the arc-shaped plate frame, and the outer walls on the two sides of the arc-shaped plate frame are fixedly connected with mounting brackets.

[0024] In a preferred scheme, the two mounting brackets are provided with threaded holes, the inner walls of the two threaded holes are movably connected with adjusting screws, the two positioning members are fixedly connected to one ends of the two adjusting screws facing the valve plug base, and the other ends of the two adjusting screws are fixedly connected with adjusting knobs.

[0025] As can be seen from the above, the tungsten carbide processing technology for the sealing structure of the faucet valve provided by the application has the effect of ensuring the spraying quality of the tungsten carbide coating. When spraying, the device can separate the coating of the base channel region from other parts of the coating before the tungsten carbide coating is set, so as to avoid damaging the coating after setting. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A flowchart of the tungsten carbide processing technology for the sealing structure of the faucet valve provided by the application is shown in the drawings.

[0027] Figure 2 A schematic diagram of the overall structure of the tungsten carbide processing technology for the sealing structure of the faucet valve provided by the application is shown in the drawings.

[0028] Figure 3 A schematic diagram of the movable base and the tungsten carbide processing nozzle combination structure of the tungsten carbide processing technology for the sealing structure of the faucet valve provided by the application is shown in the drawings.

[0029] Figure 4A valve plug base and coating separation module combined structure schematic diagram of a plug valve sealing structure tungsten carbide processing technology is provided for the application;

[0030] Figure 5 A valve plug base and base channel combined structure schematic diagram of a plug valve sealing structure tungsten carbide processing technology is provided for the application;

[0031] Figure 6 A coating separation module structure schematic diagram of a plug valve sealing structure tungsten carbide processing technology is provided for the application;

[0032] Figure 7 A plug valve sealing structure tungsten carbide processing technology is provided for the application, and a fixed base sectional structure schematic diagram is provided for the application;

[0033] Figure 8 A plug valve sealing structure tungsten carbide processing technology is provided for the application, and a protection positioning module structure schematic diagram is provided for the application.

[0034] In the figure: 1, processing base; 2, adjusting mechanism; 3, mounting seat; 4, fixing part; 5, fixed seat; 6, rotating sleeve frame; 7, electric telescopic rod; 8, electric push rod; 9, movable base; 10, tungsten carbide processing nozzle; 11, valve plug base; 12, protection positioning module; 1201, electric rod; 1202, arc-shaped plate frame; 1203, adjusting screw; 1204, adjusting knob; 1205, mounting bracket; 1206, positioning piece; 13, coating separation module; 1301, separation frame; 1302, fixed base; 1303, drive gear; 1304, driven gear; 1305, servo motor; 1306, lamination batten; 1307, magnetic roller; 1308, mounting rod; 1309, inner fixed frame; 1310, telescopic spring; 1311, roller end stop frame; 1312, fixed suction cup; 1313, telescopic air bag; 1314, communication pipe; 1315, negative pressure pump; 1316, connecting pipe; 14, base channel; 15, electromagnetic suction roller. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all embodiments.

[0036] The plug valve sealing structure tungsten carbide processing technology disclosed in the application is mainly applied to the scene that the tungsten carbide coating formed by the shielding part and the valve plug surface is integrated during spraying, which causes damage to the valve plug surface coating when the shielding part is disassembled, and affects the spraying quality.

[0037] Reference Figures 1-8 A plug valve sealing structure tungsten carbide processing technology, comprising the following steps:

[0038] S1, substrate pretreatment, use alkaline cleaning solution + mechanical treatment to completely clean the sprayed surface to remove surface oil and keep the surface clean;

[0039] S2, the sprayed surface needs to be preheated before sandblasting to remove surface moisture and improve the bonding quality of the powder and the part surface, and the suitable preheating temperature of the substrate surface is 60-90℃;

[0040] S3, sandblasting roughening, the surface roughness Ra of the ball is ≤0.4, the roundness is ≤0.03, and the roughness Ra of the valve seat sealing surface is ≤0.8;

[0041] S4, during spraying, the substrate is placed on the spraying equipment, the non-sprayed surface is well protected, and spraying is carried out;

[0042] S5, post-processing procedure, hole sealing treatment: using high temperature resistant (>850℃), corrosion resistant special hole sealing agent to penetrate the pores of the coating, focusing on sealing the sealing surface of the cock valve to improve the medium isolation performance;

[0043] S6, quality detection: detect the coating thickness (usually 0.2-0.5mm) and hardness (≥HV1200), and check the coating cracks and other defects by ultrasonic or penetration detection.

[0044] Referring to Figures 2-8 In one preferred embodiment, the spraying equipment comprises a machining base 1, the machining base 1 is provided with a mounting seat 3, the inside of the mounting seat 3 is provided with a rotating sleeve frame 6, one side inner wall of the rotating sleeve frame 6 is fixedly connected with an electric telescopic rod 7, the output end of the electric telescopic rod 7 is fixedly connected with a fixed part 4 on one side outer wall of the machining base 1, the same valve plug base 11 is arranged between the two fixed parts 4, the valve plug base 11 is provided with a base passage 14, the inside of the base passage 14 is provided with a coating separation module 13, and the top of the machining base 1 is fixedly connected with a fixing seat 5, the fixing seat 5 is provided with a protection positioning module 12;

[0045] The coating separation module 13 comprises an electromagnetic suction roller 15 and two separation frames 1301, and the two separation frames 1301 are located inside the base passage 14;

[0046] The protection positioning module 12 comprises two positioning pieces 1206.

[0047] Specifically, the electric telescopic rod 7 can adjust the distance between the two fixed parts 4 during use to fix the valve plug base body 11; the coating separation module 13 can separate the coating in the area of the base body channel 14 from the coating in other parts when the tungsten carbide coating is sprayed and not yet shaped, so as to avoid damage to the coating caused by the collection operation after the coating is shaped, thereby meeting the tungsten carbide spraying requirement; the protection positioning module 12 can assist the coating separation module 13 during use to avoid deviation, thereby meeting the protection requirement of the base body channel 14.

[0048] With reference to Figures 4-7 In a preferred embodiment, the coating separation module 13 further comprises a fixed base 1302 arranged inside the base body channel 14, both sides of the fixed base 1302 are fixedly connected with two telescopic springs 1310, one end of the two telescopic springs 1310 on the same side is fixedly connected with the same inner fixed frame 1309, and the inner walls of the two separation frames 1301 are fixedly connected with the outer walls of the two inner fixed frames 1309; the two inner fixed frames 1309 are both connected with mounting rods 1308 through bearings, the outer walls of the two mounting rods 1308 are fixedly connected with magnetic roller pieces 1307 and driven gears 1304, the inner walls of the two inner fixed frames 1309 are both provided with servo motors 1305, the output shafts of the two servo motors 1305 are both connected with driving gears 1303 through couplings, and the two driving gears 1303 are respectively engaged with the two driven gears 1304; one side of the outer wall of the two separation frames 1301 is fixedly connected with roller end blocking frames 1311, the two magnetic roller pieces 1307 are respectively arranged inside the two roller end blocking frames 1311, and the two roller end blocking frames 1311 are both provided with abutting plate strips 1306, the outer walls of the two abutting plate strips 1306 are respectively in contact with the outer walls of the two magnetic roller pieces 1307; the inside of the fixed base 1302 is provided with a mounting cavity, the inside of the mounting cavity is provided with a negative pressure pump 1315, the output end of the negative pressure pump 1315 is fixedly connected with a communication pipe 1314, the output end of the communication pipe 1314 is fixedly connected with a telescopic air bag 1313, and the input end of the negative pressure pump 1315 is fixedly connected with two connecting pipes 1316; the input end of the two connecting pipes 1316 is fixedly connected with fixed suction cups 1312, the two fixed suction cups 1312 are respectively in contact with the inner walls of the two sides of the base body channel 14, and one side of the outer wall of the fixed base 1302 is provided with two round holes, the two round holes are both in communication with the inside of the mounting cavity, and one of the two connecting pipes 1316 passes through the inside of the two round holes.

[0049] In a specific application scenario, the coating separation module 13 is suitable for the tungsten carbide spraying link, that is, the coating separation module 13 can separate the coating in the region of the base channel 14 from the coating in other regions in real time when the tungsten carbide coating is sprayed and not yet shaped, so as to avoid the coating in the region of the base channel 14 and the coating in other regions forming an integrated tungsten carbide coating, thereby avoiding damage to the coating due to the breakage of the connection between the coating in the region of the base channel 14 and the coating in other regions during the disassembly process after the spraying is shaped, so as to ensure the integrity of the coating on the surface of the valve plug base 11, thereby ensuring the quality of the tungsten carbide coating spraying.

[0050] With reference to Figure 2 and Figure 3 In a preferred embodiment, the processing base 1 is provided with a movable base 9, the movable base 9 is provided with an adjusting mechanism 2, the adjusting mechanism 2 is provided with a tungsten carbide processing spray head 10, and the processing base 1 is provided with two electric push rods 8, and the output ends of the two electric push rods 8 are fixedly connected with one side of the outer wall of the movable base 9.

[0051] Specifically, in use, the height and Y-axis position of the tungsten carbide processing spray head 10 can be changed through the adjusting mechanism 2, the X-axis position of the tungsten carbide processing spray head 10 can be changed through the electric push rod 8 and the movable base 9, and the angle of the tungsten carbide processing spray head 10 can be adjusted on the adjusting mechanism 2.

[0052] In a specific application scenario, the adjusting mechanism 2 can adjust the position of the tungsten carbide processing spray head 10 when in use to adapt to the spraying operation of the valve plug base 11.

[0053] With reference to Figure 4 , Figure 5 and Figure 8 In a preferred embodiment, the protection positioning module 12 further comprises an electric rod 1201, the electric rod 1201 is arranged on the fixed seat 5, the output end of the electric rod 1201 is fixedly connected with an arc-shaped plate frame 1202, the electromagnetic suction roller 15 is arranged on the arc-shaped plate frame 1202, and the two side walls of the arc-shaped plate frame 1202 are fixedly connected with mounting brackets 1205; the two mounting brackets 1205 are provided with threaded holes, the inner walls of the two threaded holes are fixedly connected with adjusting screws 1203 through threads, two positioning pieces 1206 are fixedly connected with one ends of the two adjusting screws 1203 facing the valve plug base 11, and the other ends of the two adjusting screws 1203 are fixedly connected with adjusting knobs 1204.

[0054] In a specific application scenario, the protection positioning module 12 is suitable for the protection link of the base channel 14, that is, the protection positioning module 12 can assist the coating separation module 13 to be set when in use, so that the coating separation module 13 is set on the axis of the valve plug base 11 to avoid deviation, thereby avoiding that the separation frame 1301 fails to completely protect the non-spraying surface of the base channel 14 due to deviation, and further ensuring the quality of the device during spraying.

[0055] Working principle: when protecting, the electric lever 1201 operates, moves the arc-shaped plate frame 1202 through the electric lever 1201, and moves to the base channel 14, at this time, the adjustment knob 1204 is rotated, the adjustment screw 1203 is rotated through the adjustment knob 1204, and then the positioning piece 1206 is adjusted, and after being adjusted to a certain position, the coating separation module 13 is set in the base channel 14, and is set on the axis of the valve plug base 11 through cooperation with the positioning piece 1206 to protect the non-spraying surface;

[0056] When spraying, the device is set in the base channel 14, the fixed suction disc 1312 is in contact with the inner wall of the base channel 14, at this time, the negative pressure pump 1315 is started, the negative pressure pump 1315 transports the gas remaining in the fixed suction disc 1312 to the inside of the stretchable air bag 1313 through the communication light to make the fixed suction disc 1312 and the inner wall of the base channel 14 adsorbed and fixed, then the tungsten carbide coating is sprayed to the valve plug base 11 and the magnetic roller piece 1307 through the tungsten carbide processing spray head 10, at this time, the fixed base 1302 and the separation frame 1301 can be rotated with the valve plug base 11, when the surface of the magnetic roller piece 1307 is sprayed, the servo motor 1305 operates, the servo motor 1305 drives the driving gear 1303 and the driven gear 1304 to rotate, and then the installation rod 1308 and the magnetic roller piece 1307 rotate to scrape the coating on the surface of the lamination batten 1306 (to avoid the influence of the coating on the attraction effect of the magnetic roller piece 1307 and the electromagnetic suction roller 15), when the magnetic roller piece 1307 rotates to the position of the electromagnetic suction roller 15, due to the attraction between the magnetic roller piece 1307 and the electromagnetic suction roller 15, the stretchable spring 1310 is stretched, and the inner fixed frame 1309 and the separation frame 1301 are further moved to separate the edges of the coating in the base channel 14 area and other parts, then the stretchable spring 1310 is reset, and the separation frame 1301 reciprocally operates until the spraying is completed.

[0057] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A tungsten carbide processing technology for a plug valve sealing structure, characterized in that, Includes the following steps: Substrate pretreatment involves using an alkaline cleaning solution and mechanical treatment to thoroughly clean the sprayed surface to remove surface oil and keep it clean. Before sandblasting, the surface to be sprayed needs to be preheated to remove surface moisture and improve the bonding quality between the powder and the part surface. The appropriate preheating temperature for the substrate surface is 60-90℃. Sandblasting roughens the surface of the ball to Ra≤0.4, roundness≤0.03, and valve seat sealing surface roughness Ra≤0.8; During spraying, the substrate is placed on the spraying equipment, the non-sprayed surfaces are protected, and then spraying is performed; Post-processing step, sealing treatment: A sealing agent is used to penetrate the micropores of the coating to focus on sealing the sealing surface of the plug valve to improve the media isolation performance; Quality inspection: Inspecting coating thickness and hardness, and checking for coating cracks and defects using ultrasonic or penetrant testing; The spraying equipment includes a processing base (1), a mounting base (3) is provided on the processing base (1), a rotating sleeve (6) is provided inside the mounting base (3), an electric telescopic rod (7) is fixedly connected to one side of the inner wall of the rotating sleeve (6), a fixing component (4) is fixedly connected to the output end of the electric telescopic rod (7) and one side of the outer wall of the processing base (1), a valve plug base (11) is provided between the two fixing components (4), a base channel (14) is provided on the valve plug base (11), a coating separation module (13) is provided inside the base channel (14), and a fixing seat (5) is fixedly connected to the top of the processing base (1), a protective positioning module (12) is provided on the fixing seat (5); The coating separation module (13) includes an electromagnetic suction roller (15) and two separation frames (1301), and both separation frames (1301) are located inside the substrate channel (14); The protective positioning module (12) includes two positioning components (1206). The coating separation module (13) also includes a fixed base (1302), which is located inside the substrate channel (14). Two telescopic springs (1310) are fixedly connected to the outer walls on both sides of the fixed base (1302). One end of the two telescopic springs (1310) on the same side is fixedly connected to the same inner fixing frame (1309), and the inner walls of the two separation frames (1301) are fixedly connected to the outer walls of the two inner fixing frames (1309) respectively. Each of the two inner fixed frames (1309) is movably connected with a mounting rod (1308). The outer walls of the two mounting rods (1308) are fixedly connected with a magnetic roller (1307) and a driven gear (1304). The inner walls of the two inner fixed frames (1309) are equipped with servo motors (1305). The output shafts of the two servo motors (1305) are connected to drive gears (1303) through a coupling. The two drive gears (1303) mesh with the two driven gears (1304) respectively. Roller end baffles (1311) are fixedly connected to one side of the outer wall of each of the two separation frames (1301). Two magnetic rollers (1307) are located inside the two roller end baffles (1311) respectively, and each roller end baffle (1311) is provided with a bonding strip (1306). The outer walls of the two bonding strips (1306) are in contact with the outer walls of the two magnetic rollers (1307) respectively. The protective positioning module (12) also includes an electric rod (1201), which is mounted on a fixed base (5). The output end of the electric rod (1201) is fixedly connected to an arc-shaped plate frame (1202), and the electromagnetic suction roller (15) is mounted on the arc-shaped plate frame (1202).

2. The tungsten carbide processing technology for a plug valve sealing structure according to claim 1, characterized in that, The fixed base (1302) has an installation cavity inside, and a negative pressure pump (1315) is installed inside the installation cavity. The output end of the negative pressure pump (1315) is fixedly connected to a connecting pipe (1314), and the output end of the connecting pipe (1314) is fixedly connected to a telescopic airbag (1313). The input end of the negative pressure pump (1315) is fixedly connected to two connecting pipes (1316).

3. The tungsten carbide processing technology for the sealing structure of a plug valve according to claim 2, characterized in that, The input ends of the two connecting tubes (1316) are fixedly connected to the fixed suction cups (1312). The two fixed suction cups (1312) are in contact with the inner walls of the two sides of the base channel (14), and two round holes are opened on one side of the outer wall of the fixed base (1302). The two round holes are connected to the inside of the mounting cavity, and one of the connecting tubes (1316) passes through the inside of the two round holes.

4. The tungsten carbide processing technology for a plug valve sealing structure according to claim 3, characterized in that, The processing base (1) is provided with a movable base (9), the movable base (9) is provided with an adjustment mechanism (2), the adjustment mechanism (2) is provided with a tungsten carbide processing nozzle (10), and the processing base (1) is provided with two electric push rods (8), the output ends of the two electric push rods (8) are fixedly connected to one side of the outer wall of the movable base (9).

5. The tungsten carbide processing technology for a plug valve sealing structure according to claim 4, characterized in that, The outer walls on both sides of the arc-shaped plate frame (1202) are fixedly connected with mounting brackets (1205).

6. The tungsten carbide processing technology for a plug valve sealing structure according to claim 5, characterized in that, Both mounting brackets (1205) are provided with threaded holes, and the inner walls of the two threaded holes are movably connected with adjusting screws (1203). Two positioning parts (1206) are respectively fixedly connected to one end of the two adjusting screws (1203) facing the valve plug base (11), and the other end of the two adjusting screws (1203) is fixedly connected with adjusting knobs (1204).

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