Combined slurry valve with flush

Abstract

The application relates to a combined slurry valve with flushing, and belongs to the technical field of valves.The combined slurry valve with flushing comprises a main valve and a secondary valve, a first feeding pipe is communicated with the main valve, a discharge port of the secondary valve is communicated with an inner cavity of the main valve, and a second feeding pipe is communicated with the secondary valve.The application has the effects of facilitating flushing of the inner wall of the main valve and reducing slurry condensation of the inner wall.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a combined slurry valve with flushing function. Background Technology

[0002] Alumina slurry is a mixed slurry obtained by adding caustic soda and abrasive ore raw materials during the production process. Its main components are aluminum hydroxide and other particulate impurities; it is ultimately used to produce alumina powder. During the alumina slurry conveying process, a slurry valve is generally used to control the flow of the alumina slurry.

[0003] In related technologies, the alumina slurry valve mainly includes a valve body and a valve cover mounted on the valve body. A valve seat is located at the discharge port of the valve body, and a valve stem slides vertically through the valve cover. A valve disc matching the valve seat is installed at the bottom of the valve stem. A feed port is located on the side of the valve body, and the valve stem is driven by a pneumatic actuator. When the slurry valve needs to be opened, the pneumatic actuator drives the valve stem to move the valve disc upwards, causing the valve disc to disengage from the valve seat and open the discharge port. When the slurry valve needs to be closed, the pneumatic actuator drives the valve stem to slide the valve disc downwards, causing the valve disc to abut against the valve seat and close the discharge port.

[0004] Regarding the aforementioned technologies, after the alumina slurry valve finishes conveying the material, the slurry on the inner wall of the valve body tends to solidify, making it difficult to clean. Summary of the Invention

[0005] To facilitate flushing the inner wall of the main valve and reduce slurry coagulation on the inner wall, this application provides a combined slurry valve with flushing function.

[0006] The combined slurry valve with flushing function provided in this application adopts the following technical solution: A combined slurry valve with flushing function includes a main valve and a secondary valve. The main valve is connected to a first feed pipe, the outlet of the secondary valve is connected to the inner cavity of the main valve, and the secondary valve is connected to a second feed pipe.

[0007] By adopting the above technical solution, the cleaning fluid is introduced into the second feed pipe by opening the outlet of the secondary valve. The cleaning fluid impacts the inner wall of the main valve through the outlet of the secondary valve, causing the main valve and the secondary valve to open alternately. Wastewater is discharged through the outlet of the main valve. Combining the main valve and the secondary valve facilitates the flushing of the inner wall of the main valve and reduces the coagulation of slurry on the inner wall.

[0008] Preferably, the secondary valve is located on the side of the main valve away from the first feed pipe, and the central axis of the connection between the secondary valve and the main valve is higher than the central axis of the connection between the first feed pipe and the main valve.

[0009] By adopting the above technical solution, it is helpful to ensure that the cleaning fluid sprayed from the outlet of the secondary valve can impact the inner wall of the first feed pipe, thereby improving the cleaning effect; at the same time, it reduces the impact of the alumina slurry entering the first feed pipe on the secondary valve to a certain extent.

[0010] Preferably, the main valve includes a first valve body, a first valve cover mounted on the first valve body, and a first valve stem slidably passing through the first valve cover. The first feed pipe is connected to the first valve body, the outlet of the secondary valve is connected to the inner cavity of the first valve body, and the central axis of the outlet of the secondary valve is perpendicular to the sliding direction of the first valve stem.

[0011] By adopting the above technical solution, the cleaning fluid sprayed from the outlet of the secondary valve can effectively flush the inner wall of the first valve body by making horizontal impacts.

[0012] Preferably, a protective sleeve is provided on the inner wall of the first valve cover, the protective sleeve extends toward the inner cavity of the first valve body, and the first valve stem slides through the protective sleeve.

[0013] By adopting the above technical solution, the protective sleeve helps to protect the first valve stem, and to a certain extent reduces the impact of alumina slurry and cleaning fluid on the first valve stem, making the first valve stem less prone to being eroded and thinned.

[0014] Preferably, the protective sleeve is located above the connection between the first feed pipe and the first valve body, and the lower edge of the protective sleeve is lower than the upper edge of the secondary valve outlet.

[0015] Preferably, the secondary valve includes a second valve body, a second valve cover mounted on the second valve body, and a second valve stem slidably passing through the second valve cover. The outlet of the second valve body is connected to the first valve body, and the second feed pipe is connected to the second valve body. A first pneumatic actuator for driving the first valve stem to move is provided on the first valve cover, and a second pneumatic actuator for driving the second valve stem to move is provided on the second valve cover. The combined slurry valve also includes a controller, and both the first and second pneumatic actuators are electrically connected to the controller.

[0016] By adopting the above technical solution, when conveying alumina slurry, the controller ensures that the second valve disc and the second valve seat cooperate to close the outlet of the second valve body; when cleaning the inner cavity of the first valve body, the controller makes the outlet of the first valve body and the outlet of the second valve body open alternately, which helps to ensure the rinsing effect and makes it less likely to cause misoperation.

[0017] Preferably, the first valve body is provided with a transparent viewing window.

[0018] By adopting the above technical solution, operators can view the cleaning status of the first valve body through the viewing window, which facilitates the setting of the cleaning time.

[0019] Preferably, the secondary valve further includes a second valve disc disposed on the second valve stem. The second valve disc is used to open or close the outlet of the second valve body. When the second valve disc extends into the cavity of the first valve body, the outlet of the second valve body is in the open state. Two guide tubes are slidably disposed on the side of the second valve disc near the first valve body. The sliding direction of the guide tubes is parallel to the sliding direction of the first valve stem. The guide tubes include a straight tube slidably disposed on the second valve disc and an arc-shaped tube connected to the straight tube. The length direction of the straight tube is parallel to the sliding direction of the second valve stem. The arc-shaped tube is located on the side of the straight tube away from the second valve stem. The arc-shaped tube protrudes outward toward the direction close to the second valve stem. The width of the arc-shaped tube is smaller than the diameter of the outlet of the second valve body. The distance between the two ends of the arc-shaped tube is greater than the diameter of the first valve stem. The first valve stem is aligned with the middle of the two ends of the arc-shaped tube. A nozzle is connected to the end of the arc-shaped tube. The nozzle is disposed on the side of the first valve body away from the second valve body, corresponding to the position of the first valve stem. An adjustment component is disposed on the second valve disc for adjusting the two straight tubes to move closer or further apart.

[0020] By adopting the above technical solution, when the second valve stem drives the second valve disc to move towards the direction closer to the first valve stem to open the outlet of the second valve body, the straight pipe and the arc-shaped pipe are adjusted by the adjusting component to slide away from the second valve disc, so that the straight pipe moves outside the second valve disc. Part of the cleaning liquid sprayed from the outlet of the second valve body can enter the straight pipe, and then be sprayed out from the nozzle of the arc-shaped pipe through the straight pipe, changing the impact direction of the cleaning liquid. This allows the cleaning liquid to also impact the part blocked by the first valve stem, enhancing the disturbance of the cleaning liquid and improving the cleaning effect.

[0021] Preferably, the adjusting assembly includes abutment blocks disposed on the arc-shaped tube, abutment rod slidably disposed on the second valve disc, a push spring disposed within the second valve disc, and a tension spring disposed within the second valve disc. The abutment blocks extend toward the direction close to the second valve disc, and the sides of the two abutment blocks that are close to each other are inclined surfaces. The distance from the side of the inclined surface away from the second valve stem to the center of the second valve stem gradually decreases along the direction away from the straight tube. The abutment rod is located between the two arc-shaped tubes, and the sliding direction of the abutment rod is parallel to the sliding direction of the second valve stem. The side of the abutment rod close to the second valve stem is used to slide relative to the inclined surfaces of the two abutment blocks, and the side of the abutment rod away from the second valve stem is used to abut against the first valve stem. The push spring is used to push the abutment rod to slide away from the second valve stem. The tension spring corresponds one-to-one with the abutment blocks, with one end of the tension spring disposed on the corresponding abutment block and the other end disposed within the second valve disc. The tension spring is used to pull the corresponding abutment block to slide toward the direction close to the second valve disc.

[0022] By adopting the above technical solution, when the second valve stem drives the second valve disc to move towards the direction closer to the first valve stem to open the outlet of the second valve body, the abutting rod gradually abuts against the first valve stem. As the second valve disc continues to move, under the abutment of the first valve stem, the abutting rod moves relatively closer to the second valve stem. At this time, the abutting rod will slide relative to the inclined surfaces of the two abutting blocks, driving the abutting blocks to drive the straight pipe and the arc-shaped pipe to slide away from the second valve disc, so that the straight pipe gradually moves outside the second valve disc, making it easier for some of the cleaning liquid sprayed from the outlet of the second valve body to enter the straight pipe and then spray out from the nozzle of the arc-shaped pipe, changing the impact direction of the cleaning liquid, and enabling it to impact the part blocked by the first valve stem, thereby improving the cleaning effect.

[0023] In summary, this application includes the following beneficial technical effects: By opening the outlet of the secondary valve, cleaning fluid is introduced into the second feed pipe. The cleaning fluid impacts the inner wall of the main valve through the outlet of the secondary valve, causing the main valve and the secondary valve to open alternately. Wastewater is discharged through the outlet of the main valve. Combining the main valve and the secondary valve facilitates flushing of the inner wall of the main valve and reduces the coagulation of slurry on the inner wall. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 This is a partial structural cross-sectional view of an embodiment of this application.

[0026] Figure 3 This is a partial structural cross-sectional view of the secondary valve in an embodiment of this application.

[0027] Figure 4 This is a cross-sectional view of the overall structure of the second valve disc in the embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Main valve; 101. First valve body; 102. First valve cover; 103. First valve stem; 104. First valve disc; 105. First valve seat; 2. Secondary valve; 201. Second valve body; 202. Second valve cover; 203. Second valve stem; 204. Second valve disc; 205. Second valve seat; 3. First feed pipe; 4. Second feed pipe; 5. Protective sleeve; 6. First pneumatic actuator; 7. Second pneumatic actuator; 8. Viewing window; 10. Nozzle; 11. Guide tube; 111. Straight tube; 112. Arc tube; 12. Abutting block; 13. Abutting rod; 131. Abutting round rod; 132. Abutting rectangular rod; 14. Push spring; 15. Tension spring; 16. Inclined surface; 17. Baffle plate; 18. Through hole; 19. Mounting groove; 20. Slide groove; 21. Support plate; 22. Groove; 23. Connecting groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] This application discloses a combined slurry valve with flushing function. (Refer to...) Figure 1 and Figure 2 The combined slurry valve with flushing function includes a main valve 1 and a secondary valve 2. The main valve 1 includes a first valve body 101, a first valve cover 102, a first valve stem 103, a first valve disc 104, and a first valve seat 105. The first valve cover 102 is mounted on the first valve body 101. The first valve stem 103 slides through the first valve cover 102 and slides vertically. Packing is provided on the side of the first valve cover 102 near the first valve stem 103 to enhance sealing. A valve seat 105 is mounted on the first valve cover 102. A first pneumatic actuator 6 is provided to drive the first valve stem 103 to slide. A first valve disc 104 is installed at the lower end of the first valve stem 103. A first valve seat 105 is fixedly installed at the outlet of the first valve body 101. The first valve disc 104 is used to cooperate with the first valve seat 105 to open or close the outlet of the first valve body 101. A first feed pipe 3 is connected to the first valve body 101. The first feed pipe 3 is inclined upward on the side away from the first valve body 101. The first feed pipe 3 is used to transport alumina slurry.

[0031] Reference Figure 1 and Figure 2 The secondary valve 2 includes a second valve body 201, a second valve cover 202, a second valve stem 203, a second valve disc 204, and a second valve seat 205. The second valve body 201 is connected to the first valve body 101, and the outlet of the second valve body 201 is connected to the inner cavity of the first valve body 101. The second valve cover 202 is installed on the side of the second valve body 201 away from the first valve body 101. The second valve stem 203 slides through the second valve cover 202, and a device for driving the second valve stem 203 is fixedly installed on the second valve cover 202. 03 The sliding second pneumatic actuator 7, the second valve disc 204 is fixedly installed at one end of the second valve stem 203 near the first valve body 101, the second valve seat 205 is installed at the outlet of the second valve body 201, the second valve disc 204 is used to cooperate with the second valve seat 205 to open or close the outlet of the second valve body 201, the second valve body 201 is connected to the second feed pipe 4, the second feed pipe 4 is used to transport cleaning fluid, and the second feed pipe 4 is inclined in the direction away from the first valve body 101.

[0032] When it is necessary to transport alumina slurry, the second pneumatic actuator 7 drives the second valve stem 203 to move the second valve disc 204, so that the second valve disc 204 abuts against the second valve seat 205, closing the outlet of the second valve body 201. The first pneumatic actuator 6 drives the first valve stem 103 to move the first valve disc 104 away from the first valve seat 105, opening the outlet of the first valve body 101, and the first feed pipe 3 inputs alumina slurry, thereby enabling the slurry to be transported. After the slurry is delivered, the first pneumatic actuator 6 drives the first valve stem 103 to move, closing the outlet of the first valve body 101. The second pneumatic actuator 7 drives the second valve stem 203 to move the second valve disc 204, disengaging it from the second valve seat 205 and opening the outlet of the second valve body 201. The second feed pipe 4 then introduces cleaning fluid, which impacts the inner wall of the first valve body 101 through the outlet of the second valve body 201. Wastewater is then discharged through the open outlet of the first valve body 101, facilitating the rinsing of the inner wall of the first valve body 101 and reducing slurry coagulation. In actual operation, the first valve body 101 and the second valve body 201 can be opened alternately to soak the inner cavity of the first valve body 101, improving the cleaning effect.

[0033] Reference Figure 2 When the second valve stem 203 drives the second valve disc 204 to move toward the direction close to the inner cavity of the first valve body 101, the second valve disc 204 is separated from the second valve seat 205. When the second valve disc 204 is located inside the first valve body 101, the discharge port of the second valve body 201 is opened, so as to greatly shorten the length of the second valve body 201 and save installation space.

[0034] Reference Figure 2 The second valve body 201 is located on the side of the first valve body 101 away from the first feed pipe 3. The central axis of the connection between the second valve body 201 and the first valve body 101 is higher than the central axis of the connection between the first feed pipe 3 and the first valve body 101. This allows the cleaning fluid sprayed from the outlet of the second valve body 201 to impact the inner wall of the first feed pipe 3, while also reducing the impact of the alumina slurry entering through the first feed pipe 3 on the second valve disc 204 to some extent. The central axis of the outlet of the second valve body 201 is perpendicular to the sliding direction of the first valve stem 103, ensuring that the second valve body 201 is horizontally positioned and the cleaning fluid is sprayed horizontally, thus guaranteeing a certain degree of rinsing effect.

[0035] Reference Figure 1 and Figure 2A protective sleeve 5 is integrally formed on the inner wall of the first valve cover 102. The protective sleeve 5 extends toward the inner cavity of the first valve body 101. The first valve stem 103 slides through the protective sleeve 5. The protective sleeve 5 is located above the second valve stem 203. The protective sleeve 5 is located above the connection between the first feed pipe 3 and the first valve body 101. The lower edge of the protective sleeve 5 is lower than the upper edge of the discharge port of the second valve body 201. When the first valve stem 103 drives the first valve disc 104 to move toward the direction close to the protective sleeve 5, the first valve disc 104 opens the discharge port of the first valve body 101.

[0036] When the first valve stem 103 moves the first valve disc 104 upward to open the outlet of the first valve body 101, the protective sleeve 5 can reduce the impact of the alumina slurry on the first valve stem 103 to a certain extent, making the first valve stem 103 less likely to be washed away and become thinner. At the same time, since the protective sleeve 5 faces the upper part of the outlet of the second valve body 201, it can also effectively protect the first valve stem 103 when the second valve body 201 is opened, reducing the impact of the cleaning fluid on the first valve stem 103 and helping to extend the service life of the first valve stem 103.

[0037] Reference Figure 1 and Figure 2 The first valve body 101 is equipped with a transparent viewing window 8, which is made of transparent tempered glass. Through the viewing window 8, the operator can observe the cleaning status inside the first valve body 101, making it convenient to set the cleaning time and cleaning intensity according to actual needs.

[0038] Reference Figure 1 and Figure 2 The combined slurry valve also includes a controller (not shown in the figure). The controller can be installed on the first valve body 101 or in a suitable external location. Both the first pneumatic actuator 6 and the second pneumatic actuator 7 are electrically connected to the controller. When conveying alumina slurry, the controller ensures that the second valve disc 204 and the second valve seat 205 cooperate to close the outlet of the second valve body 201. When cleaning the inner cavity of the first valve body 101, the controller alternately opens the outlets of the first valve body 101 and the second valve body 201, which helps to ensure the rinsing effect and reduces the likelihood of misoperation.

[0039] Reference Figure 2 , Figure 3 and Figure 4Two mounting grooves 19 are formed opposite each other on the side of the second valve disc 204 away from the second valve stem 203. The arrangement direction of the two mounting grooves 19 is parallel to the moving direction of the first valve stem 103. A guide tube 11 is slidably disposed in the mounting groove 19. The sliding direction of the guide tube 11 is parallel to the sliding direction of the first valve stem 103. The guide tube 11 includes a straight tube 111 and an arc-shaped tube 112. The straight tube 111 is slidably disposed in the mounting groove 19. The length direction of the straight tube 111 is parallel to the sliding direction of the second valve stem 203. The arc-shaped tube 112 is connected to the side of the straight tube 111 away from the second valve stem 203. Furthermore, the straight tube 111 is located in the middle of the arc-shaped tube 112, and the arc-shaped tube 112 protrudes outward toward the direction close to the second valve stem 203. The arc-shaped tube 112 is located on a horizontal plane, and the width of the arc-shaped tube 112 is smaller than the diameter of the outlet of the second valve body 201. That is, the distance between the two farthest points of the arc-shaped tube 112 in the direction perpendicular to the length of the second valve stem 203 is smaller than the diameter of the outlet of the second valve body 201, so that the arc-shaped tube 112 can be located inside the outlet of the first valve body 101. The distance between the two ends of the arc-shaped tube 112 is greater than the diameter of the protective sleeve 5, and the first valve stem 103 is aligned with the middle of the arc-shaped tube 112.

[0040] Reference Figure 2 and Figure 4 The two ends of the arc-shaped tube 112 are connected to two nozzles 10 facing different directions. The nozzles 10 are positioned opposite the first valve stem 103 on the side of the first valve body 101 away from the second valve body 201, so as to flush the part blocked by the first valve stem 103. The second valve disc 204 is provided with an adjustment component for adjusting the two straight tubes 111 to move closer or further apart.

[0041] Reference Figure 3 and Figure 4 To facilitate adjustment of the two straight pipes 111 to move closer or further apart, the adjustment assembly includes an abutment block 12, an abutment rod 13, a push spring 14, and a tension spring 15. The abutment block 12 is fixed on the side of the arc-shaped pipe 112 near the second valve disc 204. The abutment block 12 extends toward the direction of the second valve disc 204. The second valve disc 204 is provided with a sliding groove 20 that slides with the abutment block 12. Support plates 21 are fixed on opposite sides of the abutment block 12. The arrangement direction of the two support plates 21 is perpendicular to the moving direction of the second valve rod 203. The support plates 21 slide inside the second valve disc 204. The inner wall of the sliding groove 20 is provided with a side groove (not shown in the figure) that slides with the support plate 21. The sliding engagement between the support plate 21 and the side groove guides the sliding of the abutment block 12. Under the limitation of the side groove and the sliding groove 20, the abutment block 12 is not easy to completely detach from the second valve disc 204.

[0042] Reference Figure 3 and Figure 4The two abutting blocks 12 are close to each other on an inclined surface 16. The distance from the side of the inclined surface 16 away from the second valve stem 203 to the center of the second valve stem 203 gradually decreases in the direction away from the straight pipe 111. A groove 22 is provided on the lower abutting block 12, and the upper abutting block 12 is located in the groove 22 and slides in cooperation with the lower abutting block 12.

[0043] Reference Figure 2 and Figure 4 The abutment rod 13 is slidably inserted through one end of the second valve disc 204 near the first valve stem 103. The abutment rod 13 is located between two straight tubes 111. The abutment rod 13 includes an abutment round rod 131 slidably disposed in the second valve disc 204 and an abutment rectangular rod 132 fixed on the side of the abutment round rod 131 near the first valve stem 103. The sliding direction of the abutment round rod 131 is parallel to the sliding direction of the second valve stem 203. A connecting groove 23 is provided on the second valve disc 204 to slide with the abutment rod 13. The connecting groove 23 is located between two sliding grooves 20 and communicates with the sliding grooves 20 on both sides. The length direction of the abutment round rod 131 is perpendicular to the moving direction of the second valve stem 203. The length of the abutment round rod 131 is greater than the width of the abutment block 12 located below. The abutment round rod 131 is used to slide relative to the inclined surface 16 of the two abutment blocks 12.

[0044] Reference Figure 2 and Figure 4 The rectangular abutment rod 132 is aligned with the first valve rod 103. The width of the rectangular abutment rod 132 is greater than the width of the abutment block 12 located below. The rectangular abutment rod 132 is used to abut against the first valve rod 103. The push spring 14 is set in the connecting groove 23. The extension direction of the push spring 14 is parallel to the sliding direction of the abutment rod 13. One end of the push spring 14 is fixed to the bottom wall of the connecting groove 23, and the other end is fixed to the side of the abutment rod 131 near the second valve rod 203. The push spring 14 is used to push the abutment rod 13 to slide away from the second valve rod 203. There are two push springs 14. The abutment block 12 is located between the two push springs 14.

[0045] Reference Figure 3 and Figure 4 The tension spring 15 is installed in the side groove. The tension direction of the tension spring 15 is parallel to the sliding direction of the straight tube 111. One end of the tension spring 15 is fixed to the bottom wall of the side groove, and the other end is fixed to the support plate 21. The tension spring 15 is used to pull the abutment block 12 to slide towards the direction close to the second valve disc 204.

[0046] When the second valve disc 204 is in the closed state of the discharge port of the second valve body 201, the second valve disc 204 is located inside the discharge port of the second valve body 201. At this time, under the action of the push spring 14, the abutting rod 13 abuts a portion of the rectangular rod 132 extending out of the connecting groove 23, and the abutting round rod 131 is located on the side of the inclined surface 16 of the abutting block 12 close to the first valve rod 103. The straight tube 111 extends into the mounting groove 19 under the pulling action of the tension spring 15 on the abutting block 12, so that the arc-shaped tube 112 will not interfere with the inner wall of the discharge port of the second valve body 201.

[0047] When the second valve stem 203 drives the second valve disc 204 to move closer to the first valve stem 103, opening the outlet of the second valve body 201, the abutting rectangular rod 132 gradually abuts against the first valve stem 103. As the second valve disc 204 continues to move, under the abutment of the first valve stem 103, the abutting rectangular rod 132 drives the abutting round rod 131 to move relatively closer to the second valve stem 203, compressing the push spring 14. At this time, the abutting round rod 131 will slide relative to the inclined surfaces 16 of the two abutting blocks 12, driving the abutting blocks 12 to move... The straight tube 111 and the arc-shaped tube 112 slide away from the second valve disc 204. The tension spring 15 is stretched, and the straight tube 111 gradually moves to the outside of the second valve disc 204. Then, part of the cleaning fluid sprayed from the outlet of the second valve body 201 can enter the straight tube 111 along the outer wall of the second valve disc 204, and then be sprayed out from the two nozzles 10 of the arc-shaped tube 112 through the straight tube 111, changing the impact direction of the cleaning fluid and impacting the part blocked by the first valve stem 103, thereby increasing the disturbance of the cleaning fluid and improving the cleaning effect.

[0048] Reference Figure 4 A baffle plate 17 is fixed on the side of the arc-shaped tube 112 away from the straight tube 111. A through hole 18 is provided on the side of the arc-shaped tube 112 near the baffle plate 17 and on the baffle plate 17, so that some of the cleaning fluid entering the straight tube 111 can be sprayed out from the through hole 18 to rinse the side of the first valve stem 103 near the second valve body 201. At the same time, the baffle plate 17 can reduce the impact of the cleaning fluid on the first valve stem 103.

[0049] The implementation principle of this application embodiment is as follows: When it is necessary to transport alumina slurry, the second pneumatic actuator 7 drives the second valve stem 203 to move the second valve disc 204 away from the first valve stem 103, so that the second valve disc 204 abuts against the second valve seat 205 and closes the outlet of the second valve body 201. At this time, under the action of the push spring 14, a part of the abutting rectangular rod 132 will extend out of the second valve disc 204, and the abutting round rod 131 is located on the side of the inclined surface 16 of the abutting block 12 close to the first valve stem 103. The straight tube 111 extends into the mounting groove 19 under the pulling action of the tension spring 15. Next, the first pneumatic actuator 6 drives the first valve stem 103 to move the first valve disc 104 upward, so that the first valve disc 104 moves away from the first valve seat 105 and opens the outlet of the first valve body 101. At this time, alumina slurry can be input into the first feed pipe 3, and the slurry can be transported. Since the first valve disc 104 blocks the outlet of the second valve body 201 to a certain extent during the slurry transport process, the impact of the alumina slurry on the second valve disc 204 is reduced.

[0050] After the slurry is delivered, the first pneumatic actuator 6 drives the first valve stem 103 to move the first valve disc 104 downwards, closing the outlet of the first valve body 101. Then, the second pneumatic actuator 7 drives the second valve stem 203 to move the second valve disc 204 closer to the first valve stem 103, disengaging the second valve disc 204 from the second valve seat 205 and gradually opening the outlet of the second valve body 201. At this time, the abutting rectangular rod 132 abuts against the first valve stem 103. As the second valve disc 204 continues to move, the abutting rectangular rod 132 and the abutting round rod 131 move closer to the second valve stem 203, causing the abutting round rod 131 to slide relative to the inclined surfaces 16 of the two abutting blocks 12, driving the abutting blocks 12 to move the straight pipe 111. The arc-shaped tube 112 slides away from the second valve disc 204, and the straight tube 111 gradually moves to the outside of the second valve disc 204. Then, cleaning fluid is introduced into the second feed pipe 4. The cleaning fluid impacts the inner wall of the first valve body 101 through the outlet of the second valve body 201. Some of the cleaning fluid can enter the straight tube 111 and be sprayed out from the two nozzles 10 of the arc-shaped tube 112 through the straight tube 111, changing the impact direction of part of the cleaning fluid. Then, the second valve rod 203 drives the second valve disc 204 to move towards the second valve seat 205 to close the outlet of the second valve body 201. Then, the outlet of the first valve body 101 is opened to discharge wastewater. The controller makes the outlets of the first valve body 101 and the second valve body 201 open alternately. In this application, the main valve 1 and the secondary valve 2 are combined to facilitate flushing of the inner wall of the first valve body 101, reduce the coagulation of slurry on the inner wall, and achieve good cleaning effect.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A combined slurry valve with flushing function, characterized in that: The system includes a main valve (1) and a secondary valve (2). The main valve (1) includes a first valve body (101), a first valve cover (102) mounted on the first valve body (101), and a first valve stem (103) slidably passing through the first valve cover (102). A first feed pipe (3) is connected to the first valve body (101). The central axis of the outlet of the secondary valve (2) is perpendicular to the sliding direction of the first valve stem (103). The secondary valve (2) includes a second valve body (201), a second valve cover (202) mounted on the second valve body (201), and a second valve stem (203) slidably passing through the second valve cover (202). The outlet of the second valve body (201) is connected to the first valve body (101). The feed pipe (4) is connected to the second valve body (201). The secondary valve (2) also includes a second valve disc (204) disposed on the second valve stem (203). The second valve disc (204) is used to open or close the outlet of the second valve body (201). When the second valve disc (204) extends into the inner cavity of the first valve body (101), the outlet of the second valve body (201) is in the open state. Two guide tubes (11) are slidably disposed on the side of the second valve disc (204) near the first valve body (101). The sliding direction of the guide tubes (11) is parallel to the sliding direction of the first valve stem (103). The guide tubes (11) include straight tubes slidably disposed on the second valve disc (204). (111) and an arc-shaped pipe (112) connected to the straight pipe (111), the length direction of the straight pipe (111) being parallel to the sliding direction of the second valve stem (203), the arc-shaped pipe (112) being located on the side of the straight pipe (111) away from the second valve stem (203), the arc-shaped pipe (112) bulging outward toward the direction close to the second valve stem (203), the width of the arc-shaped pipe (112) being less than the diameter of the outlet of the second valve body (201), the distance between the two ends of the arc-shaped pipe (112) being greater than the diameter of the first valve stem (103), the first valve stem (103) being aligned with the middle of the two ends of the arc-shaped pipe (112), the end of the arc-shaped pipe (112) being connected to a nozzle (10), the nozzle... The nozzle (10) is positioned opposite the first valve stem (103) on the side of the first valve body (101) away from the second valve body (201). The second valve disc (204) is provided with an adjusting assembly for adjusting the two straight tubes (111) to move closer or further apart. The adjusting assembly includes an abutment block (12) on the arc-shaped tube (112), an abutment rod (13) slidably disposed on the second valve disc (204), a push spring (14) disposed in the second valve disc (204), and a tension spring (15) disposed in the second valve disc (204). The abutment block (12) extends toward the direction closer to the second valve disc (204), and the side of the two abutment blocks (12) that moves closer to each other is an inclined surface (16).The distance from the side of the inclined surface (16) away from the second valve stem (203) to the center of the second valve stem (203) gradually decreases in the direction away from the straight pipe (111). The abutment rod (13) is located between the two arc-shaped pipes (112). The sliding direction of the abutment rod (13) is parallel to the sliding direction of the second valve stem (203). The side of the abutment rod (13) closest to the second valve stem (203) is used to slide relative to the inclined surface (16) of the two abutment blocks (12). The abutment rod (13) is far from the center of the straight pipe (111). The side away from the second valve stem (203) is used to abut against the first valve stem (103). The push spring (14) is used to push the abutment rod (13) to slide away from the second valve stem (203). The tension spring (15) corresponds one-to-one with the abutment block (12). One end of the tension spring (15) is set on the corresponding abutment block (12), and the other end is set inside the second valve disc (204). The tension spring (15) is used to pull the corresponding abutment block (12) to slide closer to the second valve disc (204).

2. The combined slurry valve with flushing according to claim 1, characterized in that: The secondary valve (2) is located on the side of the main valve (1) away from the first feed pipe (3), and the central axis of the connection between the secondary valve (2) and the main valve (1) is higher than the central axis of the connection between the first feed pipe (3) and the main valve (1).

3. A combined slurry valve with flushing function according to claim 2, characterized in that: A protective sleeve (5) is provided on the inner wall of the first valve cover (102), the protective sleeve (5) extends toward the inner cavity of the first valve body (101), and the first valve stem (103) slides through the protective sleeve (5).

4. A combined slurry valve with flushing function according to claim 3, characterized in that: The protective sleeve (5) is located above the connection between the first feed pipe (3) and the first valve body (101), and the lower edge of the protective sleeve (5) is lower than the upper edge of the outlet of the secondary valve (2).

5. A combined slurry valve with flushing function according to claim 2, characterized in that: The first valve cover (102) is provided with a first pneumatic actuator (6) for driving the first valve stem (103) to move, and the second valve cover (202) is provided with a second pneumatic actuator (7) for driving the second valve stem (203) to move. The combined slurry valve also includes a controller, and the first pneumatic actuator (6) and the second pneumatic actuator (7) are both electrically connected to the controller.

6. A combined slurry valve with flushing according to claim 2, characterized in that: The first valve body (101) is provided with a transparent viewing window (8).

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