A vacuum belt filter for preparing tungsten trioxide

Abstract

The present invention discloses a vacuum belt filter for preparing tungsten trioxide, which relates to the field of vacuum belt filters and includes an annular porous rubber belt and a filter cloth attached to the upper surface of the upper end of the annular porous rubber belt. A conveyor is arranged inside the annular porous rubber belt, and a plurality of water absorption devices are arranged on the conveyor along the conveying direction. Beneficial effects: The vacuum belt filter for preparing tungsten trioxide in this application improves the conventional sliding seal connection form commonly used for the porous rubber belt and the water absorption box into a static seal connection form, greatly enhancing the sealing effect between the porous rubber belt and the water absorption box. The static seal has a long service life, reliable and lasting sealing performance, effectively meeting the requirement of further improving the working vacuum degree of the vacuum belt filter, and not causing a significant increase in operating costs due to air leakage. After subsequently reducing the excess content of WO3 in APT, it effectively reduces costs and increases profits for enterprises.

Description

Technical Field

[0001] The present invention relates to the field of vacuum belt filters, and particularly to a vacuum belt filter for preparing tungsten trioxide. Background Art

[0002] Ammonium paratungstate, as an important intermediate product in tungsten metallurgy, is the main trade product in the international tungsten market and is widely used in fields such as manufacturing tungsten metal powder, vacuum materials, alloy dies, and mechanical equipment.

[0003] The tungsten content requirement for APT - grade 0 is 88.5% - 89.2%, but the part of the tungsten content in APT greater than 88.5% is not priced. Within the standard range, the higher the tungsten content, the more waste of valuable metals is caused. Therefore, enterprises always try to reduce the excess content of WO3 in APT on the premise of meeting the tungsten content requirement of APT - grade 0.

[0004] Commonly, in enterprise production workshops, the working vacuum degree of the vacuum belt filter is increased, for example, adjusted from the original setting of - 0.25 MPa to - 0.35 MPa. By increasing the vacuum degree, the free moisture in wet APT is reduced, then the microwave drying temperature is reduced, and then the content of WO3 in APT is reduced, avoiding the increase in the WO3 content caused by too high drying temperature and the increase in the screened materials of product agglomeration. By increasing the working vacuum degree of the vacuum belt filter, the average content of WO3 in APT is reduced from 89.17% at - 0.25 MPa before to 89.04% at - 0.35 MPa, a reduction of 0.13%. Calculated according to an annual output of 7000 tons of APT and a price of 180,000 yuan per ton, it can increase the efficiency of the company by more than one million yuan per year, and the economic benefit is very obvious.

[0005] However, the above - mentioned "more than one million yuan of annual efficiency increase for the company" is only the theoretically reduced cost. In fact, it is not that much, and even the production cost of APT does not decrease but increases instead, because increasing the working vacuum degree of the vacuum belt filter will inevitably increase its operating cost, especially when the sliding sealing effect between the vacuum disc and the rubber belt is poor, slightly increasing the working vacuum degree of the vacuum belt filter will greatly increase its operating cost.

[0006] The conventional structure of the vacuum belt filter is as shown in the patent with the publication number CN221999117U. The vacuum disc is fixed, the sliding sealing efficiency between the rubber belt and the upper surface of the vacuum disc, multiple through - holes are provided on the rubber belt, a filter cloth is attached to the upper surface of the rubber belt, the slurry to be filtered is evenly distributed on the upper surface of the filter cloth, the vacuum disc is connected to a vacuum pump, and by evacuating the inside of the vacuum disc, the water in the slurry passes downward through the filter cloth and the through - holes on the rubber belt and falls into the vacuum disc. This is the basic working principle of the vacuum belt filter.

[0007] As can be seen from the working principle of the above-mentioned vacuum belt filter, whether the sliding seal connection structure between the rubber belt and the vacuum disc is well sealed determines whether the vacuum belt filter can normally filter out the moisture in the slurry. As is well known, the sealing effect of dynamic seals is not as good as that of static seals, and the sealing effect of dynamic seal structures decreases over time due to the long-term sliding friction loss of the sealing components. That is, the sealing effect at the connection between the rubber belt and the vacuum disc gradually decreases as the working duration of the vacuum belt filter increases, and the air leakage at the connection between the rubber belt and the vacuum disc becomes more serious as the vacuum degree in the vacuum disc increases. At this time, if you want to further slightly increase the vacuum degree in the vacuum disc, it is necessary to greatly increase the power of the vacuum pump, resulting in a significant increase in the energy consumption of the vacuum pump and a substantial increase in the operating cost. Therefore, it is imperative to improve the sealing form between the vacuum disc and the rubber belt and enhance the sealing durability. Summary of the Invention

[0008] The main object of the present invention is to propose a vacuum belt filter for preparing tungsten trioxide, aiming to solve the problems of poor sealing effect and non-durable sealing performance in the current vacuum belt filter due to the sliding seal connection between the rubber belt and the vacuum disc, which affects the further improvement of the working vacuum degree of the vacuum belt filter and the reduction of the excess content of WO3 in APT.

[0009] To solve the above problems, the present invention proposes a vacuum belt filter for preparing tungsten trioxide, which includes an annular porous rubber belt and a filter cloth attached to the upper surface of the upper end of the annular porous rubber belt. A conveyor is arranged inside the annular porous rubber belt, and a plurality of water absorption devices are arranged along the conveying direction on the conveyor. The water absorption devices located above the conveyor move along the moving direction of the upper end of the annular porous rubber belt under the drive of the conveyor.

[0010] The water absorption device includes:

[0011] A second motor, connected to the conveyor, and driven by the conveyor to move. The central axis of the second motor located above the conveyor is perpendicular to the upper end surface of the annular porous rubber belt.

[0012] A water absorption box, connected to the output shaft of the second motor, and driven by the second motor to rotate around the second motor. The water absorption box is provided with an open mouth, and the box mouth at the upper end of the water absorption box located above the conveyor closely adheres to the lower surface of the upper end of the annular porous rubber belt and moves at the same speed.

[0013] A vacuum pump, connected to the inside of the water absorption box through an air suction pipe, and the air suction pipe is also connected to a gas-water separator, and the gas-water separator is installed inside the water absorption box.

[0014] In one embodiment, the conveyor includes:

[0015] A mounting frame, on which at least one pair of belt rollers is rotatably mounted via a rotating shaft, a transmission belt is tightly sleeved outside the belt rollers, a mounting block is fixedly mounted on the transmission belt, a slider is fixedly mounted on the mounting block, there are multiple mounting blocks, and one mounting block is fixedly connected to the second motor of a water suction device;

[0016] A slide rail is fixedly connected to the mounting frame, and the slider is slidably connected to the slide rail;

[0017] The conductive rod is fixedly connected to the mounting frame, and the water absorption device further comprises a power receiving rod, and the power receiving rod is in sliding contact with the conductive rod to draw electricity;

[0018] Motor 1 is mounted on the mounting frame and is connected to the rotating shaft;

[0019] The displacement sensor is used to detect the position of the mounting block when it is moved by the transmission belt.

[0020] In one embodiment, the water absorption box and the output shaft of the second motor are fixedly connected via a swivel seat, and the rotation center line of the water absorption box driven by the second motor does not contact the water absorption box.

[0021] In one embodiment, the motor 2 is connected to the conveyor through a lifting device. The lifting device located above the conveyor can drive the motor 2 to move upward along the central axis of the motor 2 so that the box opening at the upper end of the water absorption box is close to the lower surface of the upper end of the annular porous rubber belt.

[0022] In one embodiment, a slide cylinder is coaxially tightly sleeved outside the motor, and the slide cylinder is slidably connected to the lifting device. The lifting device is located inside the slide cylinder, and a slewing ring is coaxially rotatably installed outside the slide cylinder. The slewing ring is fixedly connected to the lower end of the diagonal support rod, and the upper end of the diagonal support rod is fixedly connected to the water absorption box.

[0023] In one embodiment, a mounting plate is provided at the lower end of the water absorption box, a linear motor is installed on the mounting plate, the linear motor is connected to the water absorption box, and the water absorption box is driven to move on the mounting plate by the linear motor, and the moving direction is perpendicular to the central axis of the motor 2;

[0024] The mounting plate is fixedly connected to the output shaft or the swivel seat of the second motor, and the upper end of the diagonal support rod is fixedly connected to the mounting plate.

[0025] In one embodiment, the mounting plate on one of the water absorbing devices is spaced apart from the swivel seat on another adjacent water absorbing device.

[0026] In one embodiment, the water suction boxes of two adjacent water suction devices located above the conveyor are in close contact.

[0027] In one embodiment, a sealing gasket is provided at the box opening of the water absorption box.

[0028] Beneficial effects: A vacuum belt filter for preparing tungsten trioxide in this application improves the conventional sliding seal connection form commonly used for the porous rubber belt and the water absorption box to a static seal connection form, greatly enhancing the sealing effect between the porous rubber belt and the water absorption box. The static seal has a long service life, reliable and lasting sealing performance, effectively meeting the requirement of further increasing the working vacuum degree of the vacuum belt filter, and preventing a significant increase in operating costs due to air leakage. After subsequently reducing the excess content of WO3 in APT, it effectively reduces costs and increases profits for the enterprise. Brief description of the drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of a vacuum belt filter for preparing tungsten trioxide according to the present invention;

[0031] Figure 2 It is a front view of the water absorption device according to the present invention;

[0032] Figure 3 It is a left view of the water absorption device according to the present invention;

[0033] Figure 4 It is a top view of the water absorption device according to the present invention;

[0034] Figure 5 It is an internal structure diagram of the water absorption device according to the present invention.

[0035] The description of the reference numerals is as follows:

[0036] 1. Annular porous rubber belt; 2. Filter cloth; 3. Connecting rod; 4. Mounting frame; 5. Rotating shaft; 6. Belt roller; 7. Transmission belt; 8. Motor 1; 9. Annular slide rail; 10. Annular slideway; 11. Insulating mounting rod; 12. Conductive ring; 13. Mounting block; 14. Slide block; 15. Current receiving rod; 16. Slide cylinder; 17. Lifting device; 18. Motor 2; 19. Rotary seat; 20. Bearing; 21. Mounting plate; 22. Diagonal brace; 23. Rotary ring; 24. Water absorption box; 25. Sealing gasket; 26. Mounting groove; 27. Linear motor; 28. Vacuum pump; 29. Suction pipe; 30. Gas-water separator; 31. Displacement sensor; 32. Controller; 33. Control valve; a. Water absorption device 1; b. Water absorption device 2. Detailed implementation manners

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0039] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0041] The present invention provides a vacuum belt filter for preparing tungsten trioxide. The vacuum belt filter for preparing tungsten trioxide improves the conventional sliding seal connection form commonly used between the porous rubber belt and the water absorption box 24 into a static seal connection form, greatly enhancing the sealing effect between the porous rubber belt and the water absorption box 24. The static seal has a long service life, reliable and lasting sealing performance, effectively meeting the requirement of further improving the working vacuum degree of the vacuum belt filter, and preventing the operating cost from increasing significantly due to air leakage. After subsequently reducing the excess content of WO3 in APT, it can effectively reduce costs and increase profits for enterprises.

[0042] Specifically, in an embodiment of the invention, as Figure 1 shown, the vacuum belt filter for preparing tungsten trioxide includes an annular porous rubber belt 1 and a filter cloth 2 attached to the upper surface of the upper end of the annular porous rubber belt 1. The annular porous rubber belt 1 and the filter cloth 2 are one of the important structural components of a conventional vacuum belt filter. The structure of a conventional vacuum belt filter belongs to the prior art. For example, as shown in the patent with the publication number CN221999117U, therefore, other components of the vacuum belt filter except the annular porous rubber belt 1 and the filter cloth 2 (such as a slurry feeding hopper, a driving roller for driving the annular porous rubber belt 1 to rotate, a rinsing hopper, a tensioning mechanism, a deviation rectifying device, a scraper mechanism, a water receiving tank, etc.) will not be introduced in detail in this article. At the same time Figure 1 the vacuum belt filter shown in Figure 1 is only shown with the annular porous rubber belt 1 and the filter cloth 2 for the convenience of showing the content of the present invention, and other components are omitted. However, these omitted components are also indispensable components of the vacuum belt filter of the present invention. It's just that these omitted components belong to the conventional design structure of a conventional vacuum belt filter. Therefore, this article and the appendix

[0043] In this embodiment, as Figure 1 shown, when the vacuum belt filter works, the annular porous rubber belt 1 rotates in the direction indicated by the arrow in Figure 1 . A conveyor is arranged inside the annular porous rubber belt 1. A plurality of water absorption devices are arranged along the conveying direction on the conveyor, such as Figure 1 the water absorption device a and the water absorption device b marked in Figure 1 . The conveying direction of the conveyor is as indicated by the arrow in

[0044] The water absorption devices in multiple embodiments will be introduced in detail below. Embodiment

[0045] As Figures 1 - 5As shown, the water absorption device at least includes: motor two 18, water absorption box 24, and vacuum pump 28. The motor two 18 is connected to the conveyor, and the conveyor drives the motor two 18 to move. As Figure 1 shown, the central axis of the motor two 18 located above the conveyor is perpendicular to the upper end surface of the annular porous rubber belt 1. That is, when the upper end surface of the annular porous rubber belt 1 is horizontal, the central axis of the motor two 18 is vertical.

[0046] In this embodiment, as Figures 1 - 5 shown, the water absorption box 24 is located above the motor two 18. The water absorption box 24 is connected to the output shaft of the motor two 18, and the motor two 18 drives the water absorption box 24 to rotate around the motor two 18. The water absorption box 24 is provided with an open mouth. As Figure 1 shown, the water absorption box 24 located above the conveyor is horizontally arranged. The upper box opening of the water absorption box 24 located above the conveyor closely adheres to the lower surface of the upper end of the annular porous rubber belt 1 and moves at the same speed, so that the porous rubber belt and the water absorption box 24 remain relatively stationary, that is, the two are connected by static seal. The seal is reliable, greatly enhancing the sealing effect between the porous rubber belt and the water absorption box 24. The static seal has a long service life, and the sealing performance is reliable and durable, effectively meeting the requirement of further increasing the working vacuum degree of the vacuum belt filter, and not causing a large increase in operating costs due to air leakage. After reducing the excess content of WO3 in APT subsequently, it can effectively reduce costs and increase profits for the enterprise.

[0047] Specifically, as Figures 1 - 5 shown, the water absorption box 24 and the output shaft of the motor two 18 are fixedly connected through a rotary seat 19. The rotation center line of the motor two 18 driving the water absorption box 24 does not contact the water absorption box 24. With such a design, during the process of the conveyor driving the water absorption device to rotate, the water absorption device will not collide violently with the annular porous rubber belt 1, will not push up the upper end of the annular porous rubber belt 1, and will not damage the annular porous rubber belt 1, ensuring the safety of the annular porous rubber belt 1 and the filter cloth 2.

[0048] In this embodiment, as Figures 1 - 5 shown, the vacuum pump 28 is internally connected to the water absorption box 24 through an air suction pipe 29. As Figure 5 shown, the air suction pipe 29 is also connected to a gas-water separator 30. The gas-water separator 30 is installed inside the water absorption box 24. Its working process is as Figure 1 shown, the water absorption box 24 located above the conveyor is horizontally arranged. The upper box opening of the water absorption box 24 located above the conveyor closely adheres to the lower surface of the upper end of the annular porous rubber belt 1 and moves at the same speed. The porous rubber belt and the water absorption box 24 remain relatively stationary, that is, the two are connected by static seal. The water absorption box 24 located above the conveyor is driven by the conveyor and moves according to Figure 1During the process of moving in the direction indicated by the arrow, the vacuum pump 28 is started to extract the air in the water absorption box 24. Since the upper opening of the water absorption box 24 located above the conveyor is closely attached to the lower surface of the upper end of the annular porous rubber belt 1 and moves at the same speed, and the two are statically sealed and connected, the free water in the wet APT on the filter cloth 2 is forced to penetrate downward through the filter cloth 2 and the annular porous rubber belt 1 in sequence and then enter the water absorption box 24. The air-water separator 30 is provided so that the air enters the air suction pipe 29 and the water remains in the water absorption box 24. After the upper opening of the water absorption box 24 closely adheres to the lower surface of the upper end of the annular porous rubber belt 1 and moves at the same speed for a certain distance, the free water in the wet APT on the filter cloth 2 directly above the water absorption box 24 is completely absorbed. At the same time, the water absorption box 24 also moves to Figure 1 the rightmost end above the conveyor in Figure 1 as shown. During the process of the water absorption box 24 rotating downward, the control motor two 18 is controlled to drive the water absorption box 24 to rotate 180 degrees around the motor two 18, so that Figure 1 the water absorption device one at the rightmost end above the conveyor in Figure 1 becomes the water absorption device two at the rightmost end below the conveyor in Figure 1 as shown. The purpose of this design is to enable the subsequent water absorption device two to smoothly rotate upward under the drive of the conveyor and once again achieve the upper opening of the water absorption box 24 located above the conveyor to closely adhere to the lower surface of the upper end of the annular porous rubber belt 1 and move at the same speed, as Figure 1 shown. The water absorption device two at the rightmost end below the conveyor moves to the leftmost end below the conveyor under the drive of the conveyor, and then the conveyor drives the water absorption device two to rotate upward. Compared with the water absorption device one, the water absorption device two rotating upward will not collide violently with the annular porous rubber belt 1, so as to ensure that the water absorption device smoothly rotates upward under the drive of the conveyor and once again achieve the upper opening of the water absorption box 24 to closely adhere to the lower surface of the upper end of the annular porous rubber belt 1 and move at the same speed. After the water absorption device two rotates upward to

[0049] the leftmost end above the conveyor in Figure 1After the water suction device at the rightmost end above the conveyor rotates downward, the water in the water suction box 24 of the water suction device naturally flows out from the box opening. Therefore, in a vacuum belt filter for preparing tungsten trioxide in this embodiment, a water receiving tank needs to be provided directly above the conveyor to receive the water poured out from the water suction box 24.

[0050] In the water suction device of this embodiment, as Figure 1 shown, during the process that the first water suction device rotates downward driven by the conveyor and separates from the lower surface of the upper end of the annular porous rubber belt 1, the first water suction device will not collide violently with the annular porous rubber belt 1 and will not push up the upper end of the annular porous rubber belt 1; subsequently, during the process that the second water suction device rotates upward driven by the conveyor and contacts the lower surface of the upper end of the annular porous rubber belt 1 again, the second water suction device will not collide violently with the annular porous rubber belt 1 and will not push up the upper end of the annular porous rubber belt 1. Therefore, the motor two 18 is set to timely control the water suction box 24 to rotate 180 degrees forward and backward as needed to switch between the first water suction device and the second water suction device, so as to ensure that the water suction device can smoothly contact and separate from the lower surface of the upper end of the annular porous rubber belt 1, will not push up the upper end of the annular porous rubber belt 1, and will not damage the annular porous rubber belt 1, ensuring the safety of the annular porous rubber belt 1 and the filter cloth 2.

[0051] In this embodiment, as Figure 1 shown, the water suction boxes 24 of two adjacent first water suction devices above the conveyor are in close contact. Such a design enables all the wet APT on the filter cloth 2 to be affected by the water suction boxes 24 without omission, ensuring the vacuum filtration effect of the wet APT.

[0052] Furthermore, as Figures 1 - 5 shown, a sealing gasket 25 is provided at the box opening of the water suction box 24. The setting of the sealing gasket 25 can enhance the sealing effect that the upper box opening of the water suction box 24 above the conveyor closely adheres to the lower surface of the upper end of the annular porous rubber belt 1. Embodiment

[0053] The difference between this embodiment and the first embodiment is that as Figures 1 - 5As shown in the figure, the second motor 18 is connected to the conveyor by a lifting device 17. The lifting device 17 located above the conveyor can drive the second motor 18 to move upward along the central axis of the second motor 18, so that the upper box opening of the water suction box 24 closely adheres to the lower surface of the upper end of the annular porous rubber belt 1. That is, after the water suction device is driven by the conveyor to above the conveyor, the water suction device does not directly contact the lower surface of the upper end of the annular porous rubber belt 1. Instead, it is necessary to further control the lifting device 17 to lift the water suction box 24 so that the upper box opening of the water suction box 24 closely adheres to the lower surface of the upper end of the annular porous rubber belt 1 to achieve a static seal connection between the two. Compared with the design form in Embodiment 1 where the water suction device directly contacts the lower surface of the upper end of the annular porous rubber belt 1 after being driven by the conveyor to above the conveyor, this design structure, firstly, can further prevent the water suction device from colliding with the annular porous rubber belt 1 during the rotation driven by the conveyor, ensuring that the water suction device will not push up the upper end of the annular porous rubber belt 1 and guaranteeing the absolute safety of the annular porous rubber belt 1 and the water suction device. Secondly, it can prevent the water suction box 24 from colliding with the adjacent water suction boxes 24 around it during the process of the second motor 18 driving the water suction box 24 to rotate around the second motor 18. Therefore, during the process of the second motor 18 driving the water suction box 24 to rotate around the second motor 18, it is also necessary to control the lifting device 17 to drive the second motor 18 to move along the central axis of the second motor 18 to adjust the position of the water suction box 24 to avoid the water suction box 24 colliding with the adjacent water suction boxes 24 around it during the rotation process.

[0054] Further, as Figures 1 - 5 shown, a sliding cylinder 16 is coaxially and tightly sleeved outside the second motor 18. The sliding cylinder 16 is slidably connected to the lifting device 17. The lifting device 17 is located inside the sliding cylinder 16. A rotating ring 23 is coaxially rotatably installed outside the sliding cylinder 16. The rotating ring 23 is fixedly connected to the lower end of the diagonal brace 22. The upper end of the diagonal brace 22 is fixedly connected to the end of the water suction box 24 far from the second motor 18. With this design, the connection stability between the water suction box 24 and the output shaft of the second motor 18 in the water suction device can be improved, and it can be avoided that Figures 1 - 5 the end of the water suction box 24 far from the second motor 18 swings downward in Figures 1 - 5 to ensure the static seal effect between the water suction box 24 and the lower surface of the upper end of the annular porous rubber belt 1.

[0055] Further, as Figure 5 shown, the body of the second motor 18 and the rotating seat 19 are rotatably connected by a bearing 20. With this design, the installation stability of the water suction box 24 can be improved, and it can be avoided that the water suction box 24 drives the rotating seat 19 to shake relative to the output shaft of the second motor 18, affecting the stability of the water suction box 24 rotating around the second motor 18.

[0056] Further, as Figure 2As shown, an installation plate 21 and an installation groove 26 are provided at the lower end of the water absorption box 24. A linear motor 27 is installed on the installation plate 21. The linear motor 27 is located within the installation groove 26 and is connected to the water absorption box 24. The linear motor 27 drives the water absorption box 24 to move on the installation plate 21, and the moving direction is perpendicular to the central axis of the second motor 18. The installation plate 21 is fixedly connected to the output shaft or the rotary seat 19 of the second motor 18. The upper end of the diagonal strut 22 is fixedly connected to the installation plate 21. With such a design, when the second motor 18 drives the water absorption box 24 to rotate around the second motor 18, the linear motor 27 can be controlled as needed to drive the water absorption box 24 to move and adjust the position of the water absorption box 24, so as to prevent the water absorption box 24 from colliding with the adjacent water absorption boxes 24 around it during the rotation process.

[0057] In this embodiment, as Figure 1 shown, the installation plate 21 on one of the water absorption devices is spaced from the rotary seat 19 on the adjacent other water absorption device. With such a design, when the other water absorption device rotates downward driven by the conveyor, it will not collide with the installation plate 21 on one of the water absorption devices, ensuring the safety of the water absorption device.

[0058] Specifically, as Figure 1 shown, the conveyor includes: an installation frame 4, a slide rail, a conductive rod, a first motor 8, and a displacement sensor 31. The installation frame 4 is connected to Figure 1 other structural components of the vacuum belt filter (not shown in the figure) through a connecting rod 3 to fix the installation frame 4 and make the installation frame 4 stationary. At least a pair of belt rollers 6 are rotatably installed on the installation frame 4 through a rotating shaft 5. A transmission belt 7 is tightly sleeved outside the belt rollers 6. The first motor 8 is installed on the installation frame 4 and is in transmission connection with the rotating shaft 5 for driving the transmission belt 7 to rotate. An installation block 13 is fixedly installed on the transmission belt 7. A slider 14 is fixedly installed on the installation block 13. There are multiple installation blocks 13. One installation block 13 is fixedly connected to the second motor 18 or the lifting device 17 of one water absorption device. The slide rail is fixedly connected to the installation frame 4. The slider 14 is slidably connected to the slide rail. The slide rail limits the slider 14 to make the installation block 13 move smoothly driven by the transmission belt 7. The conductive rod is fixedly connected to the installation frame 4 in an insulating manner. The water absorption device further includes a power receiving rod 15. The power receiving rod 15 takes power by slidingly contacting the conductive rod to ensure the normal operation of the water absorption device. The displacement sensor 31 is used to detect the position of the installation block 13 moving driven by the transmission belt 7, so that the controller 32 can timely control the second motor 18, the lifting device 17, and the vacuum pump 28 to act, enabling the water absorption device to smoothly suck away the free water in the wet APT, smoothly rotate driven by the conveyor, and smoothly automatically switch between the first water absorption device and the second water absorption device.

[0059] In this embodiment, when there is a pair of belt rollers 6, as Figure 1As shown, at this time, the transmission belt 7 is in a ring shape. Correspondingly, the slide rail is also in a ring shape, forming a ring-shaped slide rail 9. And there are a pair of ring-shaped slide rails 9, which are arranged at intervals, so as to define a ring-shaped slideway 10 between the pair of ring-shaped slide rails 9. The ring-shaped slideway 10, the ring-shaped slide rail 9, and the ring-shaped transmission belt 7 are similar. In addition, at this time, the conductive rods are connected end to end to form a conductive ring 12, and are fixedly connected to the mounting bracket 4 through the insulating mounting rod 11.

[0060] In this embodiment, as Figure 1 , Figure 2 and Figure 4 shown, the receiving rod 15, the controller 32, and the displacement sensor 31 for detecting the position of the mounting block 13 in contact with the ring-shaped slide rail 9 are mounted on the mounting block 13.

[0061] In this embodiment, a control valve 33 is provided on the suction pipe 29. The on / off of the suction pipe 29 is controlled by the control valve 33, which saves the trouble of frequently controlling the start and stop of the vacuum pump 28 and helps to extend the service life of the vacuum pump 28. When it is necessary to suck away the free water in the wet APT, the control valve 33 is opened. Otherwise, the control valve 33 is closed. The opening and closing of the control valve 33 are automatically controlled by the controller 32 according to the position of the mounting block 13.

[0062] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A vacuum belt filter for preparing tungsten trioxide, comprising an annular porous rubber belt and a filter cloth attached to the upper surface of the upper end of the annular porous rubber belt, characterized in that: A conveyor is arranged on the inner side of the annular porous rubber belt, and a plurality of water absorbing devices are arranged on the conveyor along the conveying direction. The water absorbing devices located above the conveyor move along the moving direction of the upper end of the annular porous rubber belt driven by the conveyor; The water absorbing device comprises: Motor 2 is connected to the conveyor and drives the motor 2 to move through the conveyor. The central axis of the motor 2 located above the conveyor is perpendicular to the upper end surface of the annular porous rubber belt. The water absorption box is connected to the output shaft of the second motor, and the second motor drives the water absorption box to rotate around the second motor, so that the water absorption box can smoothly contact and separate from the lower surface of the upper end of the annular porous rubber belt without pushing the upper end of the annular porous rubber belt upward. The water absorption box is open, and the box opening of the upper end of the water absorption box located above the conveyor is close to the lower surface of the upper end of the annular porous rubber belt and moves at the same speed; A vacuum pump is connected to the interior of the water suction box through an air suction pipe, and the air suction pipe is also connected to an air-water separator, and the air-water separator is installed inside the water suction box; The second motor is connected to the conveyor through a lifting device. The lifting device located above the conveyor can drive the second motor to move upward along the central axis of the second motor so that the box opening at the upper end of the water absorption box is close to the lower surface of the upper end of the annular porous rubber belt.

2. A vacuum belt filter for preparing tungsten trioxide according to claim 1, characterized in that: The conveyor comprises: A mounting frame, on which at least one pair of belt rollers is rotatably mounted via a rotating shaft, a transmission belt is tightly sleeved outside the belt rollers, a mounting block is fixedly mounted on the transmission belt, a slider is fixedly mounted on the mounting block, there are multiple mounting blocks, and one mounting block is fixedly connected to the second motor of a water suction device; A slide rail is fixedly connected to the mounting frame, and the slider is slidably connected to the slide rail; The conductive rod is fixedly connected to the mounting frame, and the water absorption device also includes a power receiving rod, and the power receiving rod is in sliding contact with the conductive rod to draw electricity; Motor 1 is mounted on the mounting frame and is connected to the rotating shaft; The displacement sensor is used to detect the position of the mounting block when it is moved by the transmission belt.

3. A vacuum belt filter for preparing tungsten trioxide as claimed in claim 1, characterized in that: The water absorption box and the output shaft of the second motor are fixedly connected via a swivel seat, and the rotation center line of the second motor driving the water absorption box to rotate does not contact the water absorption box.

4. A vacuum belt filter for preparing tungsten trioxide according to claim 1, characterized in that: The motor is coaxially tightly sleeved with a slide cylinder, the slide cylinder is slidably connected to the lifting device, the lifting device is located in the slide cylinder, a slewing ring is coaxially rotatably installed outside the slide cylinder, the slewing ring is fixedly connected to the lower end of the diagonal support rod, and the upper end of the diagonal support rod is fixedly connected to the water absorption box.

5. A vacuum belt filter for preparing tungsten trioxide as claimed in claim 4, characterized in that: A mounting plate is provided at the lower end of the water absorption box, a linear motor is installed on the mounting plate, the linear motor is connected to the water absorption box, and the water absorption box is driven to move on the mounting plate by the linear motor, and the moving direction is perpendicular to the central axis of the motor 2; The mounting plate is fixedly connected to the output shaft or the swivel seat of the second motor, and the upper end of the diagonal support rod is fixedly connected to the mounting plate.

6. A vacuum belt filter for preparing tungsten trioxide as claimed in claim 5, characterized in that: The mounting plate on one of the water absorbing devices is spaced apart from the rotating seat on another adjacent water absorbing device.

7. A vacuum belt filter for preparing tungsten trioxide as claimed in claim 1, characterized in that: The water absorption boxes of two adjacent water absorption devices located above the conveyor are in close contact.

8. A vacuum belt filter for preparing tungsten trioxide as claimed in claim 1, characterized in that: The box opening of the water absorption box is provided with a sealing gasket.

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