A potassium nitrate filtering device

Abstract

The present invention belongs to the technical field of potassium nitrate filtration, and particularly relates to a potassium nitrate filtration device, which comprises an installation shell, a pressure filtration unit, a motor, an electric push rod, a transmission rotating shaft, and a feed pipe. In the present invention, the pressure-filtered raw materials slide out by centrifugal force. Compared with the traditional method that requires manual peeling, it realizes automatic operation and has a relatively high cleaning degree. During the pressure filtration process of the present invention, most of the pressure-filtered raw materials will be adsorbed on the filter cloth on the lower side of the installation structure. During centrifugal separation, due to the conical shape of the conical plate, the raw materials will directly slide out from the filter cloth along the centrifugal direction during centrifugation, causing relatively little damage to the filter cloth. For the traditional square pressing plate, even if the square pressing plate can be driven to rotate and the pressure-filtered raw materials can be centrifuged out by centrifugal force, during centrifugation, the raw materials will slide out closely attached to the filter cloth on the square plate, causing relatively large damage to the filter cloth.

Description

Technical Field

[0001] The present invention belongs to the technical field of potassium nitrate filtration, and particularly relates to a potassium nitrate filtration device. Background Art

[0002] Potassium nitrate is the nitrate of potassium, with the chemical formula KNO 3 (Potassium nitrate is an ionic compound and does not have a molecule, so there is no molecular weight, only a formula weight). It appears as a transparent colorless or white powder, odorless, with a specific gravity (water = 1) of 2.11. Its solubility in water is 13 g / 100 mL (varying with temperature, the higher the temperature, the higher the solubility, and among chemical substances, the solubility change of potassium nitrate is quite obvious). Its deliquescence is lower than that of sodium nitrate, with a cooling and irritating salty taste. It is soluble in water and slightly soluble in ethanol.

[0003] In the manufacturing process of potassium nitrate, a filtration device is used. Generally, a wide-plate filter press with a simple structure and low cost is selected, but there are still the following problems in use: after the filtration is completed, the solids on the filter cloth are not easy to fall off, and most of the time, manual stripping is relied on, making it difficult to achieve fully automated operation; also, due to unclean cleaning, the filter cloth is easily damaged and needs to be replaced frequently.

[0004] The present invention designs a potassium nitrate filtration device to solve the above problems. Summary of the Invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A potassium nitrate filtration device includes an installation shell, a filtration unit, a motor, an electric push rod, a transmission rotating shaft, and a feed pipe. The lower end of the installation shell has a raw material collection pool, and two electric push rods are fixedly installed inside the installation shell; the motor is fixedly installed on the inner top surface of the installation shell, a transmission rotating shaft is fixedly installed on the output shaft of the motor, and multiple filtration units are evenly slidably installed on the transmission rotating shaft from top to bottom.

[0007] The filtration unit includes a filter cloth, an installation structure, a sealing ring, and a centrifugal block. The installation structure is composed of an upper fixing ring, a lower fixing ring, and a conical plate fixed between the upper fixing ring and the lower fixing ring. The conical plate has a water storage cavity inside, a feed cylinder communicating up and down on the conical plate, and a plurality of evenly distributed square openings are formed on the upper and lower conical surfaces of the conical plate; the installation structure is slidably installed on the transmission rotating shaft; an installation ring is fixedly installed on the outer side of the upper fixing ring, a sealing ring is slidably installed on the lower side of the installation ring, a second spring is installed between the sealing ring and the installation ring, and a plurality of centrifugal blocks for controlling the up and down sliding of the sealing ring are axially and evenly slidably installed on the installation ring.

[0008] The installation structure in the uppermost filter press unit has no square opening on the upper end surface of the conical plate; the installation structure in the lowermost filter press unit has no square opening on the lower end surface of the conical plate and no feed barrel is installed on the conical plate.

[0009] The conical plate in each mounting structure has a layer of filter cloth installed on the outer side of the conical surface with a square opening, and a circular hole corresponding to the feed barrel is opened at the position of the filter cloth corresponding to the feed barrel; the lower end of the mounting structure in the lowest filter press unit is fixedly connected to the upper ends of the two electric push rods; the upper end of the mounting structure in the uppermost filter press unit is evenly installed with a plurality of limiting support rods in a circumferential direction; a first spring is installed between the mounting structures in the upper and lower filter press units; a feed pipe is fixedly installed on the upper end of the feed barrel on the mounting structure in the uppermost filter press unit, and the upper end of the feed pipe passes through the upper end surface of the mounting shell.

[0010] As a preferred solution, a guide shell is fixedly installed on the upper side of the inner ring wall of the raw material collection pool, and the outer cylindrical surface of the guide shell is a conical surface; a support base is fixedly installed on the inner bottom surface of the mounting shell, and a fixed disk is fixedly installed on the upper side of the support base; two electric push rods are fixedly installed on the upper side of the fixed disk, and the upper ends of the two electric push rods pass through the upper end surface of the guide shell and are fixedly installed with a rotating connecting sleeve, and a rotating connecting piece is fixedly installed in the rotating connecting sleeve; the lower end of the mounting structure in the lowest filter press unit is fixedly connected to the upper end of the rotating connecting piece.

[0011] As a preferred solution, a square groove is provided on the transmission shaft; two guide sliders are symmetrically fixedly installed on the inner circular surface of the lower fixed ring, and the mounting structure is installed in the mounting shell through the sliding cooperation between the two guide sliders and the square groove provided on the transmission shaft.

[0012] As a preferred solution, an elastic bellows is installed in the transmission shaft, and multiple liquid inlet pipes are evenly fixedly installed on the elastic bellows from top to bottom; the lower end of the elastic bellows is rotatably connected to a liquid discharge pipe; the liquid inlet pipe installed on the elastic bellows is connected to the water storage cavity in the conical plate.

[0013] As a preferred solution, an annular sealing groove is provided on the upper side of the mounting ring, and a plurality of mounting grooves and square mounting grooves are evenly provided circumferentially on the mounting ring, and the mounting grooves and square mounting grooves correspond to each other one by one and are interconnected; the centrifugal block is slidably installed in the mounting groove, and a guide wheel is rotatably installed in each square mounting groove, and a pull rope is fixedly installed on each centrifugal block, and the pull rope passes through the corresponding guide wheel, passes through the lower side of the mounting ring, and is fixedly connected to the corresponding sealing ring; the sealing ring in the upper filter press unit of the upper and lower filter press units cooperates with the annular sealing groove in the lower filter press unit.

[0014] As a preferred solution, the upper end of the filter cloth is installed on the upper fixing ring through a first annular pressing plate, and the first annular pressing plate and the upper fixing ring are fixedly connected through fastening bolts; the lower end of the filter cloth is installed on the lower fixing ring through a third annular pressing plate, and the third annular pressing plate and the lower fixing ring are fixedly connected through fastening bolts; a circular hole corresponding to the feeding cylinder is formed in the position of the filter cloth corresponding to the feeding cylinder, and the filter cloth is installed at the feeding cylinder through a second annular pressing plate, and the second annular pressing plate and the feeding cylinder are fixedly connected through fastening bolts.

[0015] As a preferred solution, the upper end of the limiting support rod is fixedly installed on the inner top surface of the installation shell; the lower end of the limiting support rod is connected to the corresponding installation structure through a rotary matching structure.

[0016] As a preferred solution, the adsorption capacity of the filter cloth on the lower side of the installation structure is greater than that of the filter cloth on the upper side.

[0017] Compared with the existing technology, the advantages of the present invention are as follows:

[0018] 1. In the present invention, the filtered raw materials slide out by centrifugal force. Compared with the traditional method that requires manual peeling, automatic operation is realized, and the cleaning degree is relatively high.

[0019] 2. In the present invention, the adsorption capacity of the filter cloth installed on the lower side of the conical plate is greater than that of the filter cloth on the upper side of the conical plate. During the pressure filtration process, most of the filtered raw materials will be adsorbed on the filter cloth on the lower side of the installation structure. During centrifugal separation, due to the conical shape of the conical plate, the raw materials will directly slide out from the filter cloth along the centrifugal direction during centrifugation, resulting in relatively less damage to the filter cloth; for the traditional square pressing plate, even if the square pressing plate can be driven to rotate and the filtered raw materials can be centrifuged out by centrifugal force, during centrifugation, the raw materials will slide out closely adhering to the filter cloth on the square plate, resulting in relatively greater damage to the filter cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic view of the overall component appearance.

[0021] Figure 2 It is a schematic view of the installation shell structure.

[0022] Figure 3 It is a schematic view of the drain pipe installation.

[0023] Figure 4 It is a schematic view of the cooperation between the rotary connecting piece and the rotary connecting sleeve.

[0024] Figure 5 It is a schematic view of the limiting support rod installation.

[0025] Figure 6 It is a schematic view of the first spring installation.

[0026] Figure 7 It is a schematic diagram of the installation of the second spring.

[0027] Figure 8 It is a schematic diagram of the distribution of filter cloth.

[0028] Figure 9 It is a schematic diagram of the installation of the first annular pressing plate.

[0029] Figure 10 It is a schematic diagram of the installation of the second annular pressing plate.

[0030] Figure 11 It is a schematic diagram of the installation of the third annular pressing plate.

[0031] Figure 12 It is a schematic diagram of the installation structure.

[0032] Figure 13 It is a schematic diagram of the distribution of installation chutes.

[0033] Figure 14 It is a schematic diagram of the structure of the lower fixing ring.

[0034] Names of the reference numerals in the figure: 1. Installation shell; 2. Filter pressing unit; 3. Feed pipe; 4. Motor; 5. Electric push rod; 6. Guide shell; 7. Raw material collection pool; 8. Drain pipe; 9. Transmission rotating shaft; 10. Fixed disk; 11. Elastic corrugated pipe; 12. Support base; 13. Rotating connection sleeve; 14. Rotating connection piece; 15. Liquid inlet pipe; 16. First spring; 17. Second spring; 18. Centrifugal block; 19. Pulling rope; 20. Filter cloth; 21. Installation structure; 22. Feed cylinder; 23. First annular pressing plate; 24. Fastening bolt; 25. Installation chute; 26. Guide wheel; 27. Water storage cavity; 28. Second annular pressing plate; 29. Third annular pressing plate; 30. Guide sliding block; 31. Conical plate; 32. Upper fixing ring; 33. Support grid; 34. Installation ring; 35. Square installation groove; 36. Lower fixing ring; 37. Limit support rod; 38. Sealing ring; 39. Annular sealing groove. Detailed implementation manners

[0035] The following combines the accompanying drawings and embodiments to further describe in detail the detailed implementation manners of the present invention. The following embodiments or drawings are used to illustrate the present invention, but not to limit the scope of the present invention.

[0036] A potassium nitrate filtering device, as shown in Figure 1 , 3 , 4, 6, it includes an installation shell 1, a filter pressing unit 2, a limit support rod 37, a motor 4, an electric push rod 5, a guide shell 6, a drain pipe 8, a transmission rotating shaft 9, a fixed disk 10, an elastic corrugated pipe 11, a support base 12, a first spring 16, and a feed pipe 3, wherein asFigure 2 As shown, the lower end of the installation shell 1 has a raw material collection pool 7. On the upper side of the inner ring wall of the raw material collection pool 7, a guiding shell 6 is fixedly installed. The outer circular surface of the guiding shell 6 is a conical surface; as Figure 1 、 3 shown, the support base 12 is fixedly installed on the inner bottom surface of the installation shell 1. On the upper side of the support base 12, a fixed disk 10 is fixedly installed; on the upper side of the fixed disk 10, two electric push rods 5 are fixedly installed. The upper ends of the two electric push rods 5 pass through the upper end surface of the guiding shell 6 and are fixedly installed with a rotary connection sleeve 13. Inside the rotary connection sleeve 13, a rotary connection member 14 is fixedly installed; as Figure 1 shown, the motor 4 is fixedly installed on the inner top surface of the installation shell 1. On the output shaft of the motor 4, a transmission rotating shaft 9 is fixedly installed. A square sliding groove is formed on the transmission rotating shaft 9; as Figure 3 、 4 shown, the lower end of the transmission rotating shaft 9 is rotatably installed on the fixed disk 10; an elastic corrugated pipe 11 is installed inside the transmission rotating shaft 9; as Figure 6 shown, a plurality of liquid inlet pipes 15 are fixedly installed on the elastic corrugated pipe 11 evenly from top to bottom; the lower end of the elastic corrugated pipe 11 is rotatably connected with a liquid discharge pipe 8; as Figure 1 、 4 shown, a plurality of filter pressing units 2 are slidably installed on the transmission rotating shaft 9 evenly from top to bottom.

[0037] The function of the raw material collection pool 7 is to collect the filtered raw materials. In the present invention, the filtered raw materials slide outwards from the filter pressing cavity between adjacent filter pressing units 2 under the action of centrifugal force, and the sliding raw materials will fall down into the raw material collection pool 7. In order to ensure that the raw materials can smoothly slide into the raw material collection pool 7, the guiding shell 6 is fixedly installed on the upper side of the inner ring wall of the raw material collection pool 7 in the present invention, and the conical surface on the outer circular surface of the guiding shell 6 plays a guiding role for the sliding raw materials.

[0038] The two electric push rods 5 can push the lowermost filter pressing unit 2 to slide upwards along the transmission rotating shaft 9; because the filtered raw materials need to be centrifuged out by controlling the rotation of the filter pressing unit 2 by the motor 4 during collection; in order to prevent the two electric push rods 5 from affecting the rotation of the lowermost filter pressing unit 2, a rotary connection member 14 and a rotary connection sleeve 13 are provided between the lowermost filter pressing unit 2 and the two electric push rods 5.

[0039] When the motor 4 works, it will drive the transmission rotating shaft 9 to rotate, and the transmission rotating shaft 9 drives all the filter pressing units 2 to rotate through the guiding slider 30 and the square sliding groove.

[0040] The lower end of the elastic corrugated pipe 11 of the present invention is connected with a liquid discharge pipe 8 through a rotary fit. The liquid filtered out by pressure filtration enters the corrugated pipe and then flows into the liquid discharge pipe 8 along the elastic corrugated pipe 11 and is discharged. Since the elastic corrugated pipe 11 is installed in the driving rotating shaft 9, the driving rotating shaft 9 will be driven to rotate, while the liquid discharge pipe 8 cannot rotate due to external connection. Therefore, the connection between the liquid discharge pipe 8 and the elastic corrugated pipe 11 is connected through a rotary fit.

[0041] In the present invention, since the gap between adjacent pressure filtration units 2 changes during the pressure filtration process, and the liquid inlet pipe 15 installed on the elastic corrugated pipe 11 is connected to the installation structure 21 in the pressure filtration unit 2, in order not to affect the discharge of the filtrate, the elastic corrugated pipe 11 is used in the present invention; the elastic expansion and contraction of the elastic corrugated pipe 11 is used to adapt to the change of the gap between adjacent filter pressing units.

[0042] As Figure 8 shown, the pressure filtration unit 2 includes a filter cloth 20, an installation structure 21, a first annular pressing plate 23, fastening bolts 24, a second annular pressing plate 28, a third annular pressing plate 29, a sealing ring 38, centrifugal blocks 18, and a pulling rope 19. As Figure 12 shown, the installation structure 21 is composed of an upper fixing ring 32, a lower fixing ring 36, and a conical plate 31 fixed between the upper fixing ring 32 and the lower fixing ring 36. The conical plate 31 has a water storage cavity 27 inside, the conical plate 31 has a feeding cylinder 22 communicating up and down, and a plurality of uniformly distributed square openings are opened on the upper and lower conical surfaces of the conical plate 31; as Figure 14 shown, two guiding sliders 30 are symmetrically and fixedly installed on the inner circular surface of the lower fixing ring 36. As Figure 6 shown, the installation structure 21 is installed in the installation shell 1 through the sliding fit of the two guiding sliders 30 with the square sliding grooves opened on the driving rotating shaft 9; the liquid inlet pipe 15 installed on the elastic corrugated pipe 11 communicates with the water storage cavity 27 inside the conical plate 31; as Figure 13 shown, an installation ring 34 is fixedly installed on the outer side of the upper fixing ring 32. An annular sealing groove 39 is opened on the upper side of the installation ring 34, and a plurality of installation sliding grooves 25 and square installation grooves 35 are circumferentially and uniformly opened on the installation ring 34. The installation sliding grooves 25 and the square installation grooves 35 correspond to each other and are communicated with each other; a centrifugal block 18 is slidably installed in each installation sliding groove 25, a guiding wheel 26 is rotatably installed in each square installation groove 35, a pulling rope 19 is fixedly installed on each centrifugal block 18, and the pulling rope 19 passes through the corresponding guiding wheel 26 and penetrates out of the lower side of the installation ring 34; the sealing ring 38 is slidably installed on the outer side of the upper fixing ring 32, and the upper end of the sealing ring 38 is fixedly connected with the lower end of the pulling rope 19; a second spring 17 is installed between the sealing ring 38 and the installation ring 34.

[0043] The reason for installing the feed cylinder 22 on the installation structure 21 is to ensure that the raw materials that have not been pressure-filtered can be successively added into the pressure-filtering cavities between adjacent pressure-filtering units 2. In order to ensure that the raw materials can be evenly added into each pressure-filtering cavity, the feed cylinders 22 on the upper and lower installation structures 21 of the present invention are arranged in a staggered manner successively. In the attached drawings, for the convenience of understanding the installation of the feed cylinder 22, the staggered distribution of the upper and lower feed cylinders 22 is not shown.

[0044] When adding the raw materials to be pressure-filtered, under the action of the corresponding second spring 17, the sealing ring 38 is nested in the annular sealing groove 39 opened on the lower mounting ring 34, sealing the pressure-filtering cavity between two adjacent upper and lower pressure-filtering units 2, and preventing the raw materials from overflowing from the outer edge gap of the pressure-filtering cavity between the upper and lower pressure-filtering units 2 when adding the raw materials that have not been pressure-filtered. When centrifugally discharging the pressure-filtered raw materials, the installation structure 21 will be driven to rotate by the transmission rotating shaft 9. The rotation of the installation structure 21 drives the mounting ring 34 to rotate, and the rotation of the mounting ring 34 drives the centrifugal block 18 mounted thereon to rotate. The centrifugal block 18 slides to the side away from the installation structure 21 under the centrifugal action, and the centrifugal block 18 slides to pull the sealing ring 38 upward through the pull rope 19, opening the outer edge gap of the pressure-filtering cavity between two adjacent upper and lower pressure-filtering units 2, facilitating the pressure-filtered raw materials to slide out under the centrifugal action.

[0045] In the present invention, the pressure-filtered raw materials slide out by centrifugal force. Compared with the traditional method that requires manual peeling, it realizes automatic operation and has a relatively high degree of cleaning.

[0046] The installation structure 21 of the present invention is composed of an upper fixing ring 32 and a lower fixing ring 36 distributed up and down and a conical plate 31 installed between the upper fixing ring 32 and the lower fixing ring 36. The conical plate 31 is conical. The adsorption capacity of the filter cloth 20 installed on the lower side of the conical plate 31 in the present invention is greater than that of the filter cloth 20 on the upper side of the conical plate 31. During the pressure-filtering process, most of the pressure-filtered raw materials will be adsorbed on the filter cloth 20 on the lower side of the installation structure 21. During centrifugal separation, due to the conical shape of the conical plate 31, the raw materials will directly slide out from the filter cloth 20 along the centrifugal direction during centrifugation, causing relatively less damage to the filter cloth 20. For the traditional square pressing plate, even if the square pressing plate can be driven to rotate and the pressure-filtered raw materials can be centrifuged out by centrifugal force, during centrifugation, the raw materials will slide out closely adhering to the filter cloth 20 on the square plate, causing relatively greater damage to the filter cloth 20.

[0047] For the installation structure 21 in the uppermost pressure-filtering unit 2, no square opening is provided on the upper end face of the conical plate 31; for the installation structure 21 in the lowermost pressure-filtering unit 2, no square opening is provided on the lower end face of the conical plate 31 and no feed cylinder 22 is installed on the conical plate 31.

[0048] Such as Figure 8As shown, in each mounting structure 21, a filter cloth 20 is installed on the outer side of the conical surface of the conical plate 31 where a square opening is formed, as Figure 9 shown, the upper end of the filter cloth 20 is installed on the upper fixing ring 32 through a first annular pressing plate 23, and the first annular pressing plate 23 and the upper fixing ring 32 are fixedly connected through fastening bolts 24; as Figure 11 shown, the lower end of the filter cloth 20 is installed on the lower fixing ring 36 through a third annular pressing plate 29, and the third annular pressing plate 29 and the lower fixing ring 36 are fixedly connected through fastening bolts 24; as Figure 10 shown, a circular hole corresponding to the feed cylinder 22 is formed in the filter cloth 20 at the position corresponding to the feed cylinder 22, and the filter cloth 20 is installed at the feed cylinder 22 through a second annular pressing plate 28, and the second annular pressing plate 28 and the feed cylinder 22 are fixedly connected through fastening bolts 24.

[0049] As Figure 10 shown, the lower end of the mounting structure 21 in the lowermost filter pressing unit 2 is fixedly connected to the upper end of the rotary connector 14.

[0050] As Figure 1 and 5 shown, a plurality of limiting support rods 37 are evenly installed circumferentially at the upper end of the mounting structure 21 in the uppermost filter pressing unit 2, and the upper ends of the limiting support rods 37 are fixedly installed on the inner top surface of the mounting shell 1; the lower ends of the limiting support rods 37 are connected to the corresponding mounting structures 21 through a rotary matching structure.

[0051] As Figure 6 shown, a first spring 16 is installed between the guiding sliders 30 of the mounting structures 21 in the upper and lower filter pressing units 2; the sealing ring 38 in the upper filter pressing unit 2 among the upper and lower filter pressing units 2 is matched with the annular sealing groove 39 in the lower filter pressing unit 2.

[0052] As Figure 1 shown, a feed pipe 3 is fixedly installed at the upper end of the feed cylinder 22 on the mounting structure 21 in the uppermost filter pressing unit 2, and the upper end of the feed pipe 3 penetrates through the upper end surface of the mounting shell 1.

[0053] In the present invention, the filtrate at the filter pressing position passes through the filtration of the filter cloth 20 and then enters the water storage cavity 27 of the mounting structure 21, and the filtrate entering the water storage cavity 27 will enter the elastic corrugated pipe 11 through the liquid inlet pipe 15.

[0054] The function of the first spring 16 is to control the lowermost filter pressing unit 2 to move downward by two electric push rods 5 when centrifugally filtering the raw materials in the glass filter press. During the downward movement, through the first spring 16, all the filter pressing units 2 will gradually move downward to restore to the initial uniformly distributed state, so that the gap between the outer edges of the filter pressing cavities of adjacent filter pressing units 2 is opened.

[0055] The function of the limiting support rod 37 is to limit the uppermost filter pressing unit 2. When the two electric push rods 5 push the lowermost filter pressing unit 2 to move upward, the uppermost filter pressing unit 2 remains stationary, ensuring that the gap between adjacent filter pressing units 2 gradually decreases during the filter pressing process.

[0056] As described above, it is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention falls within the protection scope of the present invention.

[0057] Embodiment: When using the filter pressing equipment designed by the present invention, in the initial state, the sealing ring 38 is located in the annular sealing groove 39 of the lower filter pressing unit 2, sealing the filter pressing cavity between two adjacent upper and lower filter pressing units 2; then the unfiltered raw material is added from the feed port, and the added raw material will be sequentially added into the filter pressing cavities between adjacent filter pressing units 2 through each feed cylinder 22.

[0058] After that, the two electric push rods 5 are used to push the lowermost filter pressing unit 2 upward. Since the uppermost filter pressing unit 2 is limited by the limiting round rod and remains relatively stationary, during the upward movement, the gap between adjacent filter pressing units 2 will gradually decrease, pressing the raw material in the filter pressing cavity; and the filtrate at the filtered part will enter the water storage cavity 27 of the installation structure 21 after passing through the filter cloth 20. The filtrate entering the water storage cavity 27 will enter the elastic corrugated pipe 11 through the liquid inlet pipe 15, and then flow along the elastic corrugated pipe 11 into the drain pipe 8 and be discharged. The pressed raw material will be adsorbed on the upper and lower filter cloths 20; then the two electric push rods 5 are used to push the lowermost filter pressing unit 2 downward. During the downward movement, through the first spring 16, all the filter pressing units 2 will gradually move downward and return to the initial evenly distributed state; then the motor 4 is controlled to work, the motor 4 drives the transmission rotating shaft 9 to rotate, the transmission rotating shaft 9 drives the installation structure 21 to rotate, the installation structure 21 rotates to drive the installation ring 34 to rotate, the installation ring 34 rotates to drive the centrifugal block 18 mounted thereon to rotate, and the centrifugal block 18 slides to the side away from the installation structure 21 under the centrifugal force. The centrifugal block 18 slides to pull the sealing ring 38 upward through the pull rope 19, opening the external gap of the filter pressing cavity between two adjacent upper and lower filter pressing units 2; and the raw material adsorbed on the upper and lower filter cloths 20 slides out of the filter pressing cavity under the centrifugal force and falls into the raw material collection pool 7 for collection.

Claims

1. A potassium nitrate filtering device, Features: It includes a mounting shell, a filter press unit, a motor, an electric push rod, a transmission shaft, and a feed pipe, wherein the lower end of the mounting shell is provided with a raw material collection pool, and two electric push rods are fixedly installed in the mounting shell; the motor is fixedly installed on the top surface of the mounting shell, and a transmission shaft is fixedly installed on the output shaft of the motor, and multiple filter press units are evenly slidably installed on the transmission shaft from top to bottom; The filter press unit comprises a filter cloth, a mounting structure, a sealing ring and a centrifugal block, wherein the mounting structure is composed of an upper fixing ring, a lower fixing ring and a conical plate fixed between the upper fixing ring and the lower fixing ring, wherein the conical plate has a water storage cavity inside, a feed cylinder communicating with each other up and down on the conical plate, and a plurality of evenly distributed square openings are opened on the upper and lower conical surfaces of the conical plate; the mounting structure is slidably mounted on the transmission shaft; a mounting ring is fixedly mounted on the outer side of the upper fixing ring, a sealing ring is slidably mounted on the lower side of the mounting ring, a second spring is mounted between the sealing ring and the mounting ring, and a plurality of centrifugal blocks for controlling the upward and downward sliding of the sealing ring are evenly slidably mounted on the mounting ring in the axial direction; The installation structure in the top filter press unit has no square opening on the upper end surface of the conical plate; the installation structure in the bottom filter press unit has no square opening on the lower end surface of the conical plate and no feed barrel is installed on the conical plate; The conical plate in each mounting structure has a layer of filter cloth installed on the outer side of the conical surface with a square opening, and a circular hole corresponding to the feed barrel is opened at the position of the filter cloth corresponding to the feed barrel; the lower end of the mounting structure in the bottom filter press unit is fixedly connected to the upper ends of the two electric push rods; the upper end of the mounting structure in the top filter press unit is evenly installed with a plurality of limit support rods in the circumferential direction; a first spring is installed between the mounting structures in the upper and lower filter press units; a feed pipe is fixedly installed on the upper end of the feed barrel on the mounting structure in the top filter press unit, and the upper end of the feed pipe passes through the upper end surface of the mounting shell; A square slide groove is provided on the transmission shaft; two guide sliders are symmetrically fixedly installed on the inner circumferential surface of the lower fixed ring, and the installation structure is installed in the installation shell through the sliding cooperation between the two guide sliders and the square slide groove provided on the transmission shaft; An elastic bellows is installed in the transmission shaft, and a plurality of liquid inlet pipes are evenly fixedly installed on the elastic bellows from top to bottom; a liquid discharge pipe is rotatably connected to the lower end of the elastic bellows; the liquid inlet pipe installed on the elastic bellows is communicated with the water storage cavity in the conical plate; An annular sealing groove is provided on the upper side of the mounting ring, and a plurality of mounting grooves and square mounting grooves are evenly provided circumferentially on the mounting ring, and the mounting grooves and square mounting grooves correspond to each other and are interconnected; the centrifugal block is slidably installed in the mounting groove, and a guide wheel is rotatably installed in each square mounting groove, and a pull rope is fixedly installed on each centrifugal block, and the pull rope passes through the corresponding guide wheel, passes through the lower side of the mounting ring, and is fixedly connected to the corresponding sealing ring; the sealing ring in the upper filter press unit of the upper and lower filter press units cooperates with the annular sealing groove in the lower filter press unit.

2. A potassium nitrate filtering device according to claim 1, Features: A guiding shell is fixedly installed on the upper side of the inner wall of the raw material collection pool, and the outer circumferential surface of the guiding shell is a conical surface; a support base is fixedly installed on the inner bottom surface of the installation shell, and a fixed disk is fixedly installed on the upper side of the support base; two electric push rods are fixedly installed on the upper side of the fixed disk, and the upper ends of the two electric push rods pass through the upper end surface of the guiding shell and are fixedly installed with a rotary connection sleeve, and a rotary connection member is fixedly installed in the rotary connection sleeve; the lower end of the installation structure in the lowermost filter pressing unit is fixedly connected to the upper end of the rotary connection member.

3. A potassium nitrate filtering device according to claim 1, characterized in that: The upper end of the filter cloth is installed on the upper fixed ring through a first annular pressing plate, and the first annular pressing plate and the upper fixed ring are fixedly connected through fastening bolts; the lower end of the filter cloth is installed on the lower fixed ring through a third annular pressing plate, and the third annular pressing plate and the lower fixed ring are fixedly connected through fastening bolts; the filter cloth is installed at the feed cylinder through a second annular pressing plate, and the second annular pressing plate and the feed cylinder are fixedly connected through fastening bolts.

4. A potassium nitrate filtering device according to claim 1, characterized in that: The upper end of the limiting support rod is fixedly installed on the inner top surface of the installation shell; the lower end of the limiting support rod is connected to the corresponding installation structure through a rotary matching structure.

5. A potassium nitrate filtering device according to claim 1, characterized in that: The adsorption capacity of the filter cloth on the lower side of the installation structure is greater than that of the filter cloth on the upper side.

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