Continuous operation filter

Abstract

The utility model discloses a continuous operation filter, and belongs to the field of particulate matter or powder filtering equipment. A continuous operation filter comprises: a tank; the gland is detachably connected with the tank body; the filter element comprises a filter pipe section, and a filter pipe sleeve is arranged on the filter pipe section; the liquid inlet cylinder is fixed with the gland and is arranged outside the filter element; the opening and closing mechanism is located below the liquid inlet cylinder, and the opening and closing mechanism is opened, so that raw water to be filtered enters the liquid inlet cylinder and is filtered by the filter element; when the opening and closing mechanism is closed, liquid is prevented from entering the liquid inlet cylinder, and the filter element is taken out. According to the continuous operation filter provided by the utility model, the filter element can be replaced without shutdown, so that the filtering efficiency is greatly improved; in addition, frequent deslagging is not needed, and the concentrated solution is discharged through an emptying port.

Description

Technical Field

[0001] This utility model relates to the field of particulate or powder filtration equipment, and in particular to the field of long-cycle continuous operation filters. Background Technology

[0002] Currently, the process for changing the filter cloth in candle filter canisters on the market is quite complicated. First, the filter canister needs to be emptied. Then, the canister lid needs to be opened manually, the filter element removed, and the filter cloth replaced. After replacing the filter cloth, it is put back into the canister, and the lid is tightened back into the canister to complete the replacement. This step requires a significant investment of manpower and time, making it very inconvenient for personnel changing the filter cloth. The filter must be stopped during filter cloth replacement.

[0003] Currently, some cartridge filters become contaminated after a certain number of filtration cycles and need to be replaced. Generally, when replacing a cartridge, the liquid in the filter tank must be drained and the tank depressurized before the cartridge can be removed for replacement. Replacing the cartridge requires shutting down the filter, which affects filtration efficiency.

[0004] Some candle filters typically use filter cartridges for filtration. As the filter cake on the cartridges thickens, the filter tank needs to be emptied of sludge. The sludge removal process is quite complicated. First, the liquid in the filter tank is expelled by air intake. Then, the filter cake is detached by backflushing the filter cartridges. Finally, the sludge is discharged through the sludge discharge port. The sludge discharge port is usually controlled by a sludge discharge valve. The sealing elements of the sludge discharge valve are frequently worn due to friction with particles, resulting in poor valve sealing and leakage. Summary of the Invention

[0005] The purpose of this invention is to provide a continuously operating filter that allows for filter element replacement without stopping the machine, greatly improving filtration efficiency; and it also eliminates the need for frequent sludge discharge, with the concentrated liquid being discharged through the vent.

[0006] Based on the above problems, the proposed solution is as follows:

[0007] A continuously operating filter, comprising:

[0008] Tank body;

[0009] A pressure cap, detachably connected to the tank body;

[0010] A filter element, including a filter tube section, wherein a filter tube sleeve is provided on the filter tube section;

[0011] The liquid inlet cylinder is fixed to the pressure cap and is located outside the filter element;

[0012] The opening and closing mechanism is located below the liquid inlet cylinder. When the opening and closing mechanism is opened, the raw water to be filtered enters the liquid inlet cylinder and is filtered by the filter element; when the opening and closing mechanism is closed, the liquid is blocked from entering the liquid inlet cylinder and the filter element is removed.

[0013] Preferably, the pressure cap has a liquid outlet hole at its center, and a plurality of through holes are distributed around the liquid outlet hole. The through holes are used to insert the filter element into the tank. The liquid outlet hole has a first liquid outlet channel that passes through the through holes.

[0014] Preferably, the first liquid outlet channel is equipped with a one-way valve to prevent liquid from flowing back from the liquid outlet into the tank; the liquid outlet is connected to the liquid outlet pipe.

[0015] Preferably, the first liquid outlet channel is a channel whose inner diameter decreases from the liquid outlet hole to the through hole, and a spherical or conical piston is provided in the first liquid outlet channel.

[0016] Preferably, the filter tube sleeve is provided with a filter tube connection hole, and the filter tube connection hole is provided with a plurality of second liquid outlet channels that penetrate the outer periphery of the filter tube sleeve. The second liquid outlet channels are provided in correspondence with the first liquid outlet channels. Sealing structures are provided on both sides of the second liquid outlet channels.

[0017] Preferably, the filter tube is provided with a threaded sealing structure that is sealed to the gland, located below the second liquid outlet channel, and the filter tube is provided with a sealing element and a sealing groove for accommodating the sealing element.

[0018] Preferably, the filter tube sleeve is provided with a flange that overlaps the gland, and the outer diameter of the filter tube sleeve is larger than the outer diameter of the filter element; the filter tube sleeve is also provided with a clamp for connecting to an external automatic tightening device.

[0019] Preferably, the opening and closing mechanism includes a cover plate and an elastic element; the tank body is provided with a bracket, which has a hollow structure; the cover plate is provided with a pin, which passes through the elastic element and is connected to the bracket.

[0020] Preferably, the tank body is provided with a liquid inlet pipe at the bottom and an air outlet at the bottom of the tank body.

[0021] Preferably, the pressure cap includes an upper plate, a middle plate, and a lower plate; the upper plate and the middle plate are provided with coaxially arranged liquid outlet holes at their centers, and the upper plate, the middle plate, and the lower plate are provided with coaxially arranged through holes for inserting the filter element into the tank; the liquid outlet hole of the middle plate is provided with a first liquid outlet channel penetrating through the through hole; the upper plate, the middle plate, and the lower plate are all sealed together.

[0022] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0023] 1. When the filter cloth needs to be discharged, the filter element can be automatically taken out of the tank and moved to the slag receiving point by the automatic tightener. The filter slag on the filter cloth can be removed by vibration or air blowing. After it is cleaned, the filter element is put back into the tank. When the removed filter element is being discharged, the other filter elements are still in the filtering state.

[0024] 2. Each filter element of this utility model can be disassembled individually. There is no need to empty the filter tank during disassembly. The steps for replacing the filter cloth are: take out the filter element, replace the filter cloth, and install the filter element. This greatly improves the efficiency of filter cloth replacement and reduces the labor intensity. Moreover, this candle filter can replace the filter element without stopping the machine. That is, when replacing the filter cloth on any one filter element, the other filter elements can continue to filter, which improves the filtration efficiency of the equipment.

[0025] 3. Due to the change in the slag discharge method of the filter element, the filter element can be directly removed from the filter for cleaning of surface particles, which reduces the particulate matter content in the tank. At the same time, it reduces the number of slag discharges or eliminates the need to discharge slag from the tank. Only the concentrate needs to be discharged periodically through the vent.

[0026] The bottom of the filter tank no longer needs a slag discharge port, reducing the height of the tank and lowering the processing cost of the candle filter tank; since there is no need to discharge slag, there is also no need to install a slag discharge valve at the bottom of the filter tank, reducing the problem of slag discharge valve failure.

[0027] 4. The filter tube sleeve and the filter tube section of the filter element are detachably threaded. When the filter element is severely contaminated, only the filter element needs to be replaced, and the filter tube sleeve can be retained, saving on filter element replacement costs. Attached Figure Description

[0028] Figure 1 This is a structural cross-sectional view of a continuously operating filter according to Example 1.

[0029] Figure 2 To Figure 1 Cross-sectional view of the filter element.

[0030] Figure 3 To Figure 1 Top view.

[0031] Figure 4 To Figure 1 A cross-sectional view.

[0032] Figure 5 This is a cross-sectional view of the structure of a continuously operating filter in Example 2.

[0033] Figure 6 This is a view showing the filter cartridge removed and the cover closed.

[0034] Figure 7 This is a view showing the state of the filter cartridge after it has been removed.

[0035] Figure 8 This is a schematic diagram of the structure of a continuously operating filter for implementation 2.

[0036] Figure 9 To Figure 8A partial exploded view.

[0037] In the diagram: Tank 1, Inlet pipe 10, Drain port 11, Support 12, Filter element 2, Filter tube section 20, Filter tube sleeve 21, Second outlet channel 210, Sealing groove 211, Flange 212, Clamp 213, Inlet cylinder 3, Cover plate 4, Elastic element 41, Pressure plate 5, Upper plate 50, Outlet hole 500, Outlet pipe 501, Middle plate 51, Outlet hole 510, First outlet channel 511, Lower plate 52, One-way valve 6, Piston 61. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0039] Example 1:

[0040] like Figures 1-4 As shown, a continuous operation filter includes a tank 1 and a filter element 2. The filter element 2 includes a filter tube section 20, and a filter tube sleeve 21 is provided on the filter tube section 20. The outer diameter of the filter tube sleeve 21 is larger than the outer diameter of the filter element 2. The tank 1 has an inlet cylinder 3 corresponding to the filter element. Below the inlet cylinder 3 is a cover plate 4 that can be opened and closed. Below the cover plate 4 is a bracket 12 for mounting the cover plate. The bracket 12 is fixedly installed inside the tank and has a hollow structure, allowing the upper and lower parts of the bracket to communicate. The cover plate 4 has a pin 42 that passes through an elastic element 41 and connects to the bracket 12. When the filter element 2 is installed, the cover plate 4 is opened to allow the raw water to be filtered to enter the inlet cylinder 3. The water passes through the filter element 2, and particulate matter is adsorbed on the surface of the filter element 2 to form a filter cake. The clear liquid is discharged from the filter tube section.

[0041] A liquid inlet pipe 10 is provided at the bottom of the tank body 1, and an air vent 11 is provided at the bottom of the tank body 1.

[0042] like Figure 1 , Figure 3 As shown, a pressure cap 5 is provided on the top of the tank body 1. The pressure cap 5 has a liquid outlet hole 500 in the center. Several through holes are distributed around the central liquid outlet hole 500 on the pressure cap, for the filter element 2 to pass through and be inserted into the tank body. A first liquid outlet channel 511 is provided between the through holes and the central liquid outlet hole 500. A one-way valve is provided in the first liquid outlet channel 511. The one-way valve is connected to the first liquid outlet channel 511 by threads for sealing. The one-way valve prevents liquid from flowing back from the liquid outlet hole into the tank body. The central liquid outlet hole 500 is connected to the liquid outlet pipe 501.

[0043] like Figure 3In another implementation of the one-way valve, the first outlet channel 511 is provided with a tapered hole with a gradually decreasing inner diameter from the central outlet hole 500 to the through hole. The tapered hole is equipped with a spherical or conical piston 60. To prevent liquid from flowing back from the outlet hole 500 into the tank body, the spherical or conical piston moves towards the through hole, blocking the tapered hole and preventing further backflow of liquid from the outlet hole 500 into the tank body 1. Conversely, the spherical or conical piston moves towards the outlet hole 500, opening the first outlet channel 511 and allowing liquid to flow out into the outlet pipe 501.

[0044] like Figure 2 The filter sleeve 21 has a filter tube connection hole at its center, which is detachably connected to the filter tube section 20. The filter tube connection hole has several second liquid outlet channels 210 that penetrate the outer circumference of the filter sleeve. For example... Figure 1 The second liquid outlet channel 210 corresponds to the first liquid outlet channel 511 on the pressure plate 5. Sealing structures are provided on both the upper and lower sides of the second liquid outlet channel 210. The upper outer diameter of the filter sleeve 21 is threadedly sealed to the through hole of the pressure plate 5, and the filter sleeve 21 also has a flange 212 that overlaps the pressure cap 5. Located below the second liquid outlet channel 210, the outer diameter of the filter sleeve has a sealing element and a sealing groove 211 for accommodating the sealing element. The filter sleeve 21 also has a clamp 213 for connecting to an external automatic tightening device (not shown in the figure).

[0045] Example 2:

[0046] like Figures 5-9 As shown, the difference from Embodiment 1 is that the pressure cap 5 is divided into three pressure plates, including an upper plate 50, a middle plate 51, and a lower plate 52; the upper plate, middle plate, and lower plate are provided with coaxial through holes for the filter element 2 to pass through, and the through hole of the upper plate is provided with an internal thread that mates with the filter tube sleeve 2. Figure 9 The middle plate 51 has a liquid outlet hole 510 at its center, and the liquid outlet hole 510 has a first liquid outlet channel 511 that penetrates through the through hole. The liquid outlet hole 500 is coaxial with and connected to the liquid outlet hole 510. The three pressure plates are connected to the tank body by bolts, and the plates are connected to each other by a sealing element (not shown in the figure).

[0047] The tank body 1 is equipped with an vent 11 at the bottom, and a valve is connected to the vent 11. Because of the discharged concentrate, the diameter of the vent pipe can be appropriately reduced, and a ball valve or butterfly valve can be used to replace the previous slag discharge valve, which greatly saves the equipment cost and maintenance cost of the filter.

[0048] The working principle of a continuously operating filter:

[0049] like Figure 5The wastewater to be filtered enters the tank 1 through the inlet pipe 10. When the filter element 2 is in use, the cover plate 4 is opened, and the wastewater enters the inlet cylinder 3. The clean liquid filtered by the filter element 2 passes through the second outlet channel 210 inside the filter tube sleeve 21, then through the first outlet channel 511 on the pressure cap, and finally is discharged from the outlet hole 510 through the outlet pipe 501. Figure 6 When a filter cake of a certain thickness forms on the surface of the filter element after filtration for a period of time, or when the filter element is severely contaminated and needs to be replaced, the automatic tightener (not shown in the figure) is used to connect the clamp 213 on the filter tube sleeve to unscrew the threads between the filter element sleeve 21 and the gland 5. Figure 6 When the filter element is raised a certain distance, before the seal below the second outlet channel 210 reaches the first outlet channel 511, the bottom of the filter element 2 has already detached from the cover plate 4. Due to the large pressure inside the tank 1, the cover plate 4 is pressed against the bottom of the inlet cylinder 3, isolating the liquid inside the inlet cylinder 3 from the liquid inside the tank 1. The liquid inside the inlet cylinder 3 is connected to the outlet pipe 501, and the pressure difference with the outside gradually decreases. The filter element pauses at this position for a certain period of time until the pressure inside the inlet cylinder 3 is released; Figure 7 As filter element 2 continues to rise, the seal below the second outlet channel 210 moves away from the first outlet channel 511. The inlet cylinder 3 connects to the outlet pipe 501, and the pressure inside the inlet cylinder 3 is the same as the external pressure, preventing liquid from spraying out. Because a one-way valve is installed in the first outlet channel, the purified liquid can only flow towards the outlet pipe 501 and cannot enter the inlet cylinder 3 where the removed filter element is located. When one filter element is removed, the others can still filter normally, without affecting the filtration progress.

[0050] The filter element 2 is removed from the tank 1 and moved to the slag receiving point. The filter slag on the filter cloth can be removed by vibration or air blowing. After it is cleaned, the filter element is put back into the tank 1. The filter element can also be removed to replace the filter bag. After the filter bag is replaced, the filter element can be inserted into the through hole of the pressure cap 5. The filter element is tightened and sealed by the automatic tightener and installed in place.

[0051] Meanwhile, the filter sleeve 21 and the filter tube section 20 of the filter element 2 are detachably threaded. When the filter element is severely contaminated, it can be replaced, and the filter sleeve 21 can continue to be used, saving costs.

[0052] Because filter element 2 is taken directly from the filter, surface particles are cleaned outside the tank 1, reducing the particle content inside the tank 1. This reduces the number of times slag is discharged or eliminates the need to discharge slag from the tank. The filter does not need to be equipped with a slag discharge port, only an air vent. When filtration has been performed for a certain period of time, and the accumulated particle content in the filter tank reaches a threshold, the concentrate is discharged through the air vent.

[0053] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A continuously operating filter, characterized in that, include: Tank body; A pressure cap, detachably connected to the tank body; A filter element, including a filter tube section, wherein a filter tube sleeve is provided on the filter tube section; The liquid inlet cylinder is fixed to the pressure cap and is located outside the filter element; The opening and closing mechanism is located below the liquid inlet cylinder. When the opening and closing mechanism is opened, the raw water to be filtered enters the liquid inlet cylinder and is filtered by the filter element; when the opening and closing mechanism is closed, the liquid is blocked from entering the liquid inlet cylinder and the filter element is removed.

2. A continuously operating filter according to claim 1, characterized in that, The pressure cap has a liquid outlet hole at its center, and several through holes are distributed around the liquid outlet hole. The through holes are used to insert the filter element into the tank. The liquid outlet hole has a first liquid outlet channel that passes through the through holes.

3. A continuously operating filter according to claim 2, characterized in that, The first liquid outlet channel is equipped with a one-way valve to prevent liquid from flowing back from the liquid outlet into the tank; the liquid outlet is connected to the liquid outlet pipe.

4. A continuously operating filter according to claim 2, characterized in that, The first liquid outlet channel is a channel whose inner diameter decreases from the liquid outlet hole to the through hole, and a spherical or conical piston is provided in the first liquid outlet channel.

5. A continuously operating filter according to claim 1, characterized in that, The filter tube sleeve is provided with a filter tube connection hole, and the filter tube connection hole is provided with a plurality of second liquid outlet channels that penetrate the outer periphery of the filter tube sleeve. The second liquid outlet channels are provided in correspondence with the first liquid outlet channels. Sealing structures are provided on both sides of the second liquid outlet channels.

6. A continuously operating filter according to claim 5, characterized in that, The filter tube sleeve is equipped with a threaded sealing structure that is sealed to the pressure cap, located on the lower side of the second liquid outlet channel. The filter tube sleeve is equipped with a sealing element and a sealing groove that accommodates the sealing element.

7. A continuously operating filter according to claim 1, characterized in that, The filter tube sleeve is provided with a flange that overlaps the cover, and the outer diameter of the filter tube sleeve is larger than the outer diameter of the filter element; the filter tube sleeve is also provided with a clamp for connecting to an external automatic tightening device.

8. A continuously operating filter according to claim 1, characterized in that, The opening and closing mechanism includes a cover plate and an elastic element; a bracket is provided inside the tank, and the bracket has a hollow structure; the cover plate is provided with a pin, and the pin passes through the elastic element and is connected to the bracket.

9. A continuously operating filter according to claim 1, characterized in that, The tank is equipped with an inlet pipe at the bottom and an outlet at the bottom of the tank.

10. A continuously operating filter according to claim 1, characterized in that, The pressure cap includes an upper plate, a middle plate, and a lower plate; the upper plate and the middle plate are provided with coaxially arranged liquid outlet holes at their centers, and the upper plate, the middle plate, and the lower plate are provided with coaxially arranged through holes for inserting the filter element into the tank; the liquid outlet hole of the middle plate is provided with a first liquid outlet channel penetrating through the through hole; the upper plate, the middle plate, and the lower plate are all sealed together.

Images