A valve wear-resistant life test device

Abstract

A valve wear-resistant life test device belongs to the technical field of valve testing. The invention includes an air compressor, a filter, a gas storage tank, a shunt pipe, a tank body, a lock hopper, a silo, a rotary separator and a dust collector. The air compressor, the filter, the gas storage tank and the shunt pipe are connected in sequence. There are interface one, interface two, interface three and interface four on the shunt pipe. A rotary discharging valve is installed at the bottom of the tank body, and an emptying valve is installed at the bottom of the rotary discharging valve. The invention realizes the wear-resistant life test of the valve before it is actually put on the line by simulating various parameters in the powder transmission system such as powder particle size, pressure difference, flow rate, etc. in the valve application site, provides reliable data support for the valve scheme design, realizes the real-time monitoring of system parameters and the uninterrupted cyclic transmission of powder through the program logic control of the system itself, and the valve test process does not require personnel monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of valve testing, and particularly to a valve wear-resistant life testing device. Background Art

[0002] With the continuous development of industries such as electric power and chemical industry, ceramic valves are more and more widely used in powder conveying systems. In many cases, valves need to withstand the erosion and wear of high-concentration and high-flow-rate powders for a long time. The wear-resistant life of the valves will directly affect the continuity and safety of on-site production. Therefore, higher and higher requirements are put forward for ceramic valves.

[0003] However, the existing valve testing methods are single, especially the lack of wear-resistant life testing means. Before the implementation of a new ceramic valve solution, there is an urgent need for a valve wear-resistant life testing device that can operate continuously to specifically test the wear-resistant life of new ceramic valves, so as to quickly obtain the first-hand feedback information on valve use, improve problems, and provide more detailed data support for evaluating the expected life of valves in different sites.

[0004] In view of the above problems, a valve wear-resistant life testing device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a valve wear-resistant life testing device, which works with this device, thus solving the problems in the above background.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A valve wear-resistant life testing device includes an air compressor, a filter, a gas storage tank, a shunt pipe, a tank body, a lock hopper, a silo, a rotary separator and a dust collector. The air compressor, the filter, the gas storage tank and the shunt pipe are connected in sequence. The shunt pipe is provided with an interface one, an interface two, an interface three and an interface four. A rotary discharge valve is installed at the bottom of the tank body, and an emptying valve is installed at the bottom of the rotary discharge valve. A boost valve is jointly connected between the outlet of the rotary discharge valve and the interface one. A charging valve one is jointly connected between the interface two and the tank body. A switching valve one is jointly connected between the top of the tank body and the bottom of the lock hopper. A charging valve two is jointly connected between the interface three and the lock hopper. A switching valve two is jointly connected between the top of the lock hopper and the bottom of the silo. A charging valve three is jointly connected between the interface four and the silo. A discharge regulating valve is jointly connected between the outlet of the rotary separator and the inlet of the dust collector. A balance valve one is jointly connected to the sides of the tank body and the lock hopper. A balance valve two is jointly connected to the sides of the lock hopper and the silo. A test valve is jointly connected between the rotary discharge valve and the inlet of the rotary separator.

[0007] Further, a first pressure gauge is installed on the top of the gas storage tank, a second pressure gauge and a first level gauge are installed on the top of the tank body, a third pressure gauge and a second level gauge are installed on the top of the lock hopper, a fourth pressure gauge is installed on the top of the silo, and a manual valve is installed at the bottom of the dust collector.

[0008] Further, the rotary feeder valve includes a valve body, a flange, a ball core, a valve seat, a core shaft, a bearing bracket and a motor bracket. The valve body is fixedly connected to the bottom of the tank body through the flange. Both sides of the valve body are provided with lugs, and each lug is internally provided with sealing packing. The bearing bracket and the motor bracket are respectively fixed on the two lugs. A motor is fixed on the motor bracket. Bearings are installed in both the bearing bracket and the motor bracket. Each bearing is fixedly pressed by a bearing end cover. The core shaft penetrates through the two bearings and is arranged through the sealing packing in the lug. The sealing packing is pressed by a packing pressing plate. The ball core is fixedly connected to the core shaft by a key connection. The valve seat is placed above the ball core, and a plurality of springs are evenly arranged between the flange and the valve seat.

[0009] Further, a feeding port is fixed on the top of the silo. A blind plate is provided at the top end of the feeding port. A driving mechanism is fixed on the inner top wall of the silo, and a plurality of loosening mechanisms are fixed on the driving mechanism.

[0010] Further, the driving mechanism includes a first mounting ring fixed on the inner top wall of the silo and a plurality of driving cylinders. A plurality of guide rods are fixed on the bottom surface of the first mounting ring. One end of the plurality of guide rods is jointly fixed with a limit ring. A slider is slidably connected to the side wall of each guide rod. The movable end of each driving cylinder is fixedly connected to one of the sliders. The bottom surface of the limit ring is fixedly connected to a second mounting ring through a plurality of brackets. A plurality of L-shaped piston assemblies are fixed on the second mounting ring. The top movable end of each L-shaped piston assembly is fixedly connected to one of the sliders. Each loosening mechanism is fixedly connected to the side movable end of one of the L-shaped piston assemblies.

[0011] Further, the loosening mechanism includes a long rod fixedly connected to the side movable end of the L-shaped piston assembly. A plurality of connecting sleeves are rotatably connected to the side wall of the long rod. The plurality of connecting sleeves are arranged at equal intervals along the axial direction of the long rod. A plurality of first loosening blocks are fixed on the outer wall of each connecting sleeve. A plurality of second loosening blocks are fixedly connected to the side wall of the long rod. The plurality of second loosening blocks are respectively arranged in the intervals between the plurality of connecting sleeves.

[0012] Further, the rotary separator includes a shell. A ceramic lining is pasted on the inner wall of the shell. An inlet pipe is fixedly penetrated through the side wall of the shell. An outlet pipe is fixedly penetrated through the top of the shell. The inlet pipe enters along the tangential direction of the inner diameter of the ceramic lining. The bottom height of the outlet pipe is lower than the height of the inlet pipe.

[0013] Furthermore, a baffle is fixedly installed inside the dust collector. The baffle divides the interior of the dust collector into an upper cavity and a lower cavity. Two dust removal bags are fixedly connected through the baffle.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. By simulating various parameters in the powder transmission system such as powder particle size, pressure difference, and flow rate at the valve application site, the present invention realizes the wear-resistant life test of the valve before it is actually put into use, providing reliable data support for the valve scheme design;

[0016] 2. Through the system's own program logic control, the present invention realizes the real-time monitoring of system parameters and the uninterrupted cyclic transmission of powder, and the valve test process does not require personnel monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the valve wear-resistant life test device of the present invention;

[0018] Figure 2 is a schematic diagram of the structure of the shunt pipe part of the present invention;

[0019] Figure 3 is a schematic diagram of the structure of the rotary feeder part of the present invention;

[0020] Figure 4 is a schematic diagram of the structure of the rotary separator part of the present invention;

[0021] Figure 5 is a schematic diagram of the structure of the dust collector part of the present invention;

[0022] Figure 6 is a cross-sectional view of the silo part of the present invention;

[0023] Figure 7 is a schematic diagram of the overall structure of the driving mechanism and the loosening mechanism part of the present invention;

[0024] Figure 8 is a connection diagram of the driving mechanism and the loosening mechanism part of the present invention;

[0025] Figure 9 is of the present invention Figure 8 an enlarged schematic diagram of the structure of part A.

[0026] In the figure: 1, air compressor; 2, filter; 3, gas storage tank; 4, first pressure gauge; 5, shunt pipe; 6, auxiliary blowing valve; 7, pressure charging valve I; 8, pressure charging valve II; 9, pressure charging valve III; 10, rotary feeding valve; 11, tank body; 12, lock hopper; 13, silo; 14, switching valve I; 15, switching valve II; 16, second pressure gauge; 17, third pressure gauge; 18, fourth pressure gauge; 19, balance valve I; 20, balance valve II; 21, rotary separator; 22, dust collector; 23, manual valve; 24, test valve; 25, first level gauge; 26, second level gauge; 27, drain valve; 28, drain regulating valve; 29, drive mechanism; 30, loosening mechanism;

[0027] 51, interface I; 52, interface II; 53, interface III; 54, interface IV;

[0028] 101, valve body; 102, flange; 103, ball core; 104, valve seat; 105, spring; 106, core shaft; 107, sealing packing; 108, packing pressing plate; 109, bearing bracket; 110, motor bracket; 111, bearing; 112, bearing end cover; 113, motor;

[0029] 131, feeding port; 132, blanking plate;

[0030] 211, housing; 212, ceramic inner lining; 213, inlet pipe; 214, outlet pipe;

[0031] 221, upper cavity; 222, lower cavity; 223, baffle; 224, dust removal bag;

[0032] 291, first mounting ring; 292, driving cylinder; 293, guide rod; 294, limiting ring; 295, slider; 296, second mounting ring; 297, L-shaped piston assembly;

[0033] 301, long rod; 302, connecting sleeve; 303, first loosening block; 304, second loosening block. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figure 1 - Figure 2As shown in the figure, a valve wear-resistant life test device includes an air compressor 1, a filter 2, a gas storage tank 3, a shunt pipe 5, a tank body 11, a lock hopper 12, a silo 13, a rotary separator 21 and a dust collector 22. The air compressor 1, the filter 2, the gas storage tank 3 and the shunt pipe 5 are connected in sequence. The filter 2 is used to filter out water vapor and oil stains. The shunt pipe 5 is provided with an interface one 51, an interface two 52, an interface three 53 and an interface four 54. A rotary discharge valve 10 is installed at the bottom of the tank body 11. The outlet of the rotary discharge valve 10 and the interface one 51 are jointly connected with an assist blowing valve 6. The interface two 52 and the tank body 11 are jointly connected with a charging valve one 7. The top of the tank body 11 and the bottom of the lock hopper 12 are jointly connected with a switching valve one 14. The interface three 53 and the lock hopper 12 are jointly connected with a charging valve two 8. The top of the lock hopper 12 and the bottom of the silo 13 are jointly connected with a switching valve two 15. The interface four 54 and the silo 13 are jointly connected with a charging valve three 9. The outlet of the rotary separator 21 and the inlet of the dust collector 22 are jointly connected with an evacuation regulating valve 28. A balance valve one 19 is jointly connected to the sides of the tank body 11 and the lock hopper 12, which is used to balance the pressure difference between the tank body 11 and the lock hopper 12, and avoid the powder in the lock hopper 12 being unable to fall normally through the switching valve one 14 due to the pressure difference problem. A balance valve two 20 is jointly connected to the sides of the lock hopper 12 and the silo 13, which is used for pressure balance when discharging powder. The rotary discharge valve 10 and the inlet of the rotary separator 21 are jointly connected with a test valve 24. The pipeline connecting the rotary separator 21 and the test valve 24 is a ceramic pipe. A drain valve 27 is installed at the bottom of the rotary discharge valve 10. When all the pressure in the system is emptied, open the drain valve 27, the switching valve one 14, the switching valve two 15 and start the rotary discharge valve 10, then all the powder in the silo 13, the lock hopper 12 and the tank body 11 can be emptied. If there is concern about powder accumulation, the pressure in the gas storage tank 3 can be controlled slightly higher than the atmospheric pressure, open the charging valve three 9, and further clean the inside of the silo 13, the lock hopper 12 and the tank body 11 through a slightly positive pressure.

[0036] A first pressure gauge 4 is installed on the top of the gas storage tank 3, which can monitor the pressure in the gas storage tank 3 in real time, set the upper and lower pressure limits. When the pressure is lower than the lower limit, the air compressor 1 starts. When the pressure reaches the upper limit, the air compressor 1 stops running. A second pressure gauge 16 and a first level gauge 25 are installed on the top of the tank body 11. When the device is running, open the charging valve one 7 and monitor the value of the second pressure gauge 16 at the same time. When the pressure in the tank body 11 reaches the required pressure, close the charging valve one 7. A third pressure gauge 17 and a second level gauge 26 are installed on the top of the lock hopper 12. The third pressure gauge 17 is used to monitor the internal pressure of the lock hopper 12 in real time. A fourth pressure gauge 18 is installed on the top of the silo 13, which is used to monitor the internal pressure of the silo 13 in real time. A manual valve 23 is installed at the bottom of the dust collector 22, which is used to periodically clean the accumulated dust in the dust collector 22.

[0037] Set the pressure values of the gas storage tank 3 and the tank body 11 according to the pre-valve pressure requirement of the test valve 24. By controlling the switches of the air compressor 1 and the first pressure charging valve 7 through a program, it can ensure that the pressures in the gas storage tank 3 and the tank body 11 always change within the required range. The pressure in the silo 13 is set according to the post-valve pressure of the test valve 24, and the opening degrees of the third pressure charging valve 9 and the evacuation regulating valve 28 are controlled through a program to maintain the pressure. Start the rotary feeding valve 10, and the powder is sent out of the tank body 11 under the action of the pressure difference and gravity. Open the auxiliary blowing valve 6, and send the powder into the rotary separator 21 through the ceramic pipe and the test valve 24. Under the action of the rotary separator 21, most of the powder falls back into the silo 13 again, and a very small part of the dust enters the dust collector 22 and is captured and recycled by the dust collector 22. The powder starts to circulate continuously, so that the wear resistance test of the test valve 24 can be continuously carried out.

[0038] When the first level gauge 25 in the tank body 11 detects that the powder reaches the set lower limit threshold, there is still powder in the tank body 11 at this time, but it needs to be added again. Control the second pressure charging valve 8 through a program to raise the pressure in the lock hopper 12 to be almost the same as the pressure in the silo 13, and then close the second pressure charging valve 8. Open the second balance valve 20. After the pressures in the silo 13 and the lock hopper 12 are balanced, open the second switch valve 15, and the powder falls by gravity until it reaches the upper limit value of the second level gauge 26. Close the second switch valve 15 and the second balance valve 20. During this process, the rotary feeding valve 10 does not stop.

[0039] Then the second pressure charging valve 8 is opened again to increase the pressure in the lock hopper 12 to be close to that in the tank body 11, and then the second pressure charging valve 8 is closed. Open the first balance valve 19. After the pressures in the two storage tanks are balanced, open the first switch valve 14. After all the powder in the lock hopper 12 falls into the tank body 11 under the action of gravity, close the first balance valve 19 and the first switch valve 14. By circulating in this way, there can always be powder in the tank body 11, and the rotary feeding valve 10 feeds continuously, realizing the continuous test of the test valve 24.

[0040] In summary, the present invention provides a valve wear resistance life test device, which can realize the automatic circulation of powder. By adjusting the different opening degrees of the test valve 24, the service life of the valve in the powder can be detected, providing clearer experimental results for the scheme verification of the new structure of the valve and shortening the new product scheme verification cycle of the ceramic valve.

[0041] Such as Figure 3As shown in the figure, the rotary discharge valve 10 includes a valve body 101, a flange 102, a ball core 103, a valve seat 104, a core shaft 106, a bearing bracket 109, and a motor bracket 110, and can discharge materials downward evenly and continuously. The valve body 101 is fixedly connected to the bottom of the tank body 11 through the flange 102. Both sides of the valve body 101 are provided with lug ears, and each lug ear is internally provided with a sealing packing 107. The bearing bracket 109 and the motor bracket 110 are respectively fixed on the two lug ears. A motor 113 is fixed on the motor bracket 110. Bearings 111 are installed in both the bearing bracket 109 and the motor bracket 110. Each bearing 111 is pressed and fixed through a bearing end cover 112. The core shaft 106 passes through the two bearings 111 and is arranged through the sealing packing 107 in the lug ear. The sealing packing 107 is pressed by a packing pressing plate 108 to realize the rotary seal between the core shaft 106 and the packing. The ball core 103 is fixed on the core shaft 106, and the valve seat 104 is placed above the ball core 103. A plurality of springs 105 are evenly arranged between the flange 102 and the valve seat 104. Both the ball core 103 and the valve seat 104 are made of wear-resistant structural ceramics, which can reduce the wear of the powder particles on the ball core 103 and the valve seat 104 during the rotation while realizing the seal, and can greatly improve the service life of the rotary discharge valve 10.

[0042] As Figure 4 shown in the figure, the rotary separator 21 includes a housing 211, and a ceramic lining 212 is pasted on the inner wall of the housing 211. An inlet pipe 213 is fixedly penetrated through the side wall of the housing 211, and an outlet pipe 214 is fixedly penetrated through the top of the housing 211. The inlet pipe 213 enters along the tangential direction of the inner circle of the ceramic lining 212. The bottom height of the outlet pipe 214 is lower than the height of the inlet pipe 213. The ceramic lining 212 can effectively reduce the high-speed erosion of the powder particles. The powder enters the rotary separator 21 through the inlet pipe 213. While the powder particles rotate along the inner wall of the ceramic lining 212, they gradually fall under the action of gravity into the bin 13 at the bottom of the rotary separator 21. The gas-phase medium with dust flows out from the outlet pipe 214 at the top of the rotary separator 21 under the action of the pressure difference and flows into the dust collector 22 through the evacuation regulating valve 28.

[0043] As Figure 5 shown in the figure, a baffle 223 is fixed inside the dust collector 22. The baffle 223 divides the inside of the dust collector 22 into an upper cavity 221 and a lower cavity 222. Two dust removal bags 224 are fixedly penetrated and connected on the baffle 223. The upper cavity 221 is directly communicated with the atmosphere. The air in the lower cavity 222 can enter the atmosphere through the dust removal bags 224, and the dust is filtered by the dust removal bags 224 and remains in the lower cavity 222. By periodically introducing compressed air into the upper cavity 221, the dust on the surface of the dust removal bags 224 is blown off. When the system is not working, the manual valve 23 can be opened manually to clean the dust in the lower cavity 222.

[0044] As Figure 6As shown, a feeding port 131 is fixedly provided at the top of the bin 13, and a blanking plate 132 is provided at the top end of the feeding port 131. By opening the blanking plate 132, powder can be added into the bin 13. A driving mechanism 29 is fixedly provided on the inner top wall of the bin 13, and a plurality of loosening mechanisms 30 are fixedly provided on the driving mechanism 29. The loosening mechanisms 30 are inserted into the powder and reciprocate under the drive of the driving mechanism 29 to loosen the powder, so as to avoid the increase of internal friction and adhesion force caused by the over-compaction of the powder, thereby causing poor discharging.

[0045] Specifically, when the device is in use, open the blanking plate 132, add powder into the bin 13 through the feeding port 131, and then reinstall the blanking plate 132. Open the second switching valve 15, and let the material fall by gravity. Real-time monitoring is carried out through the second level gauge 26 to fill the lock hopper 12 with powder, and then close the second switching valve 15. Open the first switching valve 14 until the powder in the lock hopper 12 is emptied. Repeat the above operations until there is enough powder in the tank body 11 to meet the conditions for circulation.

[0046] As Figure 7 - Figure 8 As shown, the driving mechanism 29 includes a first mounting ring 291 fixedly provided on the inner top wall of the bin 13 and a plurality of driving cylinders 292. A plurality of guide rods 293 are fixedly provided on the bottom surface of the first mounting ring 291. One end of the plurality of guide rods 293 is jointly fixedly provided with a limiting ring 294. A slider 295 is slidably connected to the side wall of each guide rod 293. The movable end of each driving cylinder 292 is fixedly connected to one of the sliders 295. The bottom surface of the limiting ring 294 is fixedly connected to a second mounting ring 296 through a plurality of brackets. A plurality of L-shaped piston assemblies 297 are fixedly provided on the second mounting ring 296. The top and side of the L-shaped piston assemblies 297 are provided with movable ends, and two pistons are hermetically and slidably arranged inside and are respectively fixedly connected to the two movable ends. The top movable end of each L-shaped piston assembly 297 is fixedly connected to one of the sliders 295. Each loosening mechanism 30 is fixedly connected to the side movable end of one of the L-shaped piston assemblies 297.

[0047] Specifically, the movable end of the driving cylinder 292 can push the slider 295 to slide downward along the guide rod 293. When the slider 295 slides downward, the movable end at the top of the L-shaped piston assembly 297 retracts, and the movable end at the side extends, driving the loosening mechanism 30 to move towards the inner wall of the bin 13, so as to achieve the effect of loosening the powder.

[0048] As Figure 9As shown, the loosening mechanism 30 includes a long rod 301 fixedly connected to the movable end of the side of the L-shaped piston assembly 297, and a plurality of connecting sleeves 302 are rotatably connected to the side wall of the long rod 301. The plurality of connecting sleeves 302 are equidistantly arranged along the axial direction of the long rod 301. A plurality of first loosening blocks 303 are fixed on the outer wall of each connecting sleeve 302, and a plurality of second loosening blocks 304 are fixedly connected to the side wall of the long rod 301. The plurality of second loosening blocks 304 are respectively arranged in the intervals of the plurality of connecting sleeves 302.

[0049] Specifically, the first loosening block 303 and the second loosening block 304 are both triangular prism structures. When the loosening mechanism 30 moves, the dense powder in the moving direction is first broken up by the multiple first loosening blocks 303 on the long rod 301 to reduce the resistance during movement, and the powder perpendicular to the moving direction is loosened by the second loosening block 304. When the friction between the two sides of the second loosening block 304 and the powder is unbalanced, the second loosening block 304 drives the connecting sleeve 302 to rotate along the long rod 301 to further improve the loosening effect.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve wear-resistant life test device, comprising an air compressor (1), a filter (2), a gas storage tank (3), a shunt pipe (5), a tank body (11), a lock hopper (12), a silo (13), a cyclone separator (21) and a dust collector (22), characterized in that: The air compressor (1), filter (2), gas storage tank (3) and shunt pipe (5) are connected in sequence. The shunt pipe (5) is provided with an interface one (51), an interface two (52), an interface three (53) and an interface four (54). A rotary discharge valve (10) is installed at the bottom of the tank body (11). An evacuation valve (27) is installed at the bottom of the rotary discharge valve (10). A boost valve (6) is jointly connected to the outlet of the rotary discharge valve (10) and the interface one (51). A charging valve one (7) is jointly connected to the interface two (52) and the tank body (11). A switching valve one (14) is jointly connected to the top of the tank body (11) and the bottom of the lock hopper (12). A charging valve two (8) is jointly connected to the interface three (53) and the lock hopper (12). A switching valve two (15) is jointly connected to the top of the lock hopper (12) and the bottom of the silo (13). A charging valve three (9) is jointly connected to the interface four (54) and the silo (13). An evacuation regulating valve (28) is jointly connected to the outlet of the cyclone separator (21) and the inlet of the dust collector (22). A balance valve one (19) is jointly connected to the sides of the tank body (11) and the lock hopper (12). A balance valve two (20) is jointly connected to the sides of the lock hopper (12) and the silo (13). A test valve (24) is jointly connected to the rotary discharge valve (10) and the inlet of the cyclone separator (21).

2. The valve wear-resistant life test device according to claim 1, characterized in that: A first pressure gauge (4) is installed at the top of the gas storage tank (3). A second pressure gauge (16) and a first level gauge (25) are installed at the top of the tank body (11). A third pressure gauge (17) and a second level gauge (26) are installed at the top of the lock hopper (12). A fourth pressure gauge (18) is installed at the top of the silo (13). A manual valve (23) is installed at the bottom of the dust collector (22).

3. The valve wear-resistant life test device according to claim 1, characterized in that: The rotary discharge valve (10) includes a valve body (101), a flange (102), a ball core (103), a valve seat (104), a core shaft (106), a bearing bracket (109) and a motor bracket (110). The valve body (101) is fixedly connected to the bottom of the tank body (11) through the flange (102). Both sides of the valve body (101) are provided with lugs, and a sealing packing (107) is arranged inside each lug. The bearing bracket (109) and the motor bracket (110) are respectively fixed on the two lugs. A motor (113) is fixed on the motor bracket (110). Bearings (111) are installed inside both the bearing bracket (109) and the motor bracket (110). Each bearing (111) is tightly fixed through a bearing end cover (112). The core shaft (106) penetrates through the two bearings (111) and is arranged through the sealing packing (107) inside the lug. The sealing packing (107) is tightly pressed through a packing pressing plate (108). The ball core (103) is fixedly connected to the core shaft (106) through a key connection. The valve seat (104) is placed above the ball core (103). A plurality of springs (105) are evenly arranged between the flange (102) and the valve seat (104).

4. A valve wear-resistant life test device according to claim 1, characterized in that: A feeding port (131) is fixed to the top of the silo (13). A blind plate (132) is provided at the top end of the feeding port (131). A driving mechanism (29) is fixed to the inner top wall of the silo (13), and a plurality of loosening mechanisms (30) are fixed to the driving mechanism (29).

5. The valve wear-resistant life test device according to claim 4, characterized in that: The driving mechanism (29) includes a first mounting ring (291) fixed to the inner top wall of the silo (13) and a plurality of driving cylinders (292). A plurality of guide rods (293) are fixed to the bottom surface of the first mounting ring (291). One end of the plurality of guide rods (293) is commonly fixed with a limiting ring (294). A slider (295) is slidably connected to the side wall of each guide rod (293). The movable end of each driving cylinder (292) is fixedly connected to one of the sliders (295). The bottom surface of the limiting ring (294) is fixedly connected to a second mounting ring (296) through a plurality of brackets. A plurality of L-shaped piston assemblies (297) are fixed to the second mounting ring (296). The top movable end of each L-shaped piston assembly (297) is fixedly connected to one of the sliders (295). Each loosening mechanism (30) is fixedly connected to the side movable end of one of the L-shaped piston assemblies (297).

6. The valve wear resistance life test device according to claim 5, characterized in that: The loosening mechanism (30) includes a long rod (301) fixedly connected to the side movable end of the L-shaped piston assembly (297). A plurality of connecting sleeves (302) are rotatably connected to the side wall of the long rod (301). The plurality of connecting sleeves (302) are arranged at equal intervals along the axial direction of the long rod (301). A plurality of first loosening blocks (303) are fixed to the outer wall of each connecting sleeve (302). A plurality of second loosening blocks (304) are fixedly connected to the side wall of the long rod (301). The plurality of second loosening blocks (304) are respectively arranged in the intervals between the plurality of connecting sleeves (302).

7. A valve wear-resistant life test device according to claim 1, characterized in that: The rotary separator (21) includes a housing (211). A ceramic lining (212) is pasted on the inner wall of the housing (211). An inlet pipe (213) is fixedly penetrated through the side wall of the housing (211). An outlet pipe (214) is fixedly penetrated through the top of the housing (211). The inlet pipe (213) enters along the tangential direction of the inner diameter of the ceramic lining (212). The bottom height of the outlet pipe (214) is lower than the height of the inlet pipe (213).

8. A valve wear-resistant life test device according to claim 1, characterized in that: A baffle (223) is fixed inside the dust collector (22). The baffle (223) divides the inside of the dust collector (22) into an upper cavity (221) and a lower cavity (222). Two dust removal bags (224) are fixedly penetrated through the baffle (223).

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