阅读说明：本技术 过滤器 (Filter ) 是由 张振旺 侯汉宗 陈曦 刘圣 王晓阳 罗皎蕾 潘越齐 于 2019-11-28 设计创作，主要内容包括：本发明提供了一种过滤器,涉及干化系统技术领域,以解决现有过滤器工作不连续的技术问题。该过滤器包括壳体、控制器,以及与控制器电连接的压差检测机构、电动排污阀和刷洗机构；壳体上设置有进水管、出水管和排污管,内部设置有滤芯,电动排污阀设置于排污管；压差检测机构的两端分别与滤芯的两侧连通,用于检测过滤前后的压差值,当压差值达到预设定的阈值时,压差检测机构向控制器发出控制信号；控制器接收到控制信号后,控制刷洗机构对滤芯刷洗,刷洗完成后控制电动排污阀打开排污,排污完成后控制电动排污阀关闭。在刷洗机构对滤芯刷洗的过程中以及电动排污阀打开进行排污的过程中,使该过滤器仍能够持续过滤。(The invention provides a filter, relates to the technical field of drying systems, and aims to solve the technical problem that the existing filter is discontinuous in work. The filter comprises a shell, a controller, a pressure difference detection mechanism, an electric blowdown valve and a scrubbing mechanism, wherein the pressure difference detection mechanism, the electric blowdown valve and the scrubbing mechanism are electrically connected with the controller; the shell is provided with a water inlet pipe, a water outlet pipe and a sewage discharge pipe, a filter element is arranged in the shell, and the electric sewage discharge valve is arranged in the sewage discharge pipe; the two ends of the pressure difference detection mechanism are respectively communicated with the two sides of the filter element and are used for detecting the pressure difference value before and after filtration, and when the pressure difference value reaches a preset threshold value, the pressure difference detection mechanism sends a control signal to the controller; and after receiving the control signal, the controller controls the brushing mechanism to brush the filter element, controls the electric blow-down valve to open and blow down after brushing is finished, and controls the electric blow-down valve to close after blow-down is finished. The filter can still continuously filter in the process of brushing the filter element by the brushing mechanism and in the process of opening the electric blowdown valve for blowdown.)

1. A filter, comprising a housing (10), a controller (30), and a differential pressure detection mechanism (40), an electric blowdown valve (50) and a scrubbing mechanism (60) electrically connected to the controller (30);

the shell (10) is provided with a water inlet pipe (11), a water outlet pipe (12) and a sewage discharge pipe (13), a filter element (20) is arranged in the shell, and the electric sewage discharge valve (50) is arranged in the sewage discharge pipe (13);

the two ends of the differential pressure detection mechanism (40) are respectively communicated with the two sides of the filter element (20) and are used for detecting the differential pressure value before and after filtration, and when the differential pressure value reaches a preset threshold value, the differential pressure detection mechanism (40) sends a control signal to the controller (30);

and after receiving the control signal, the controller (30) controls the brushing mechanism (60) to brush the filter element (20), controls the electric blowdown valve (50) to open and blowdown after brushing is finished, and controls the electric blowdown valve (50) to close after blowdown is finished.

2. A filter according to claim 1, wherein the brushing mechanism (60) comprises a motor (61) and a rotating brush;

the motor (61) is mounted to the housing (10);

one end of the rotary brush is in transmission connection with the motor (61), and the other end of the rotary brush extends into the shell (10) and can brush the filter element (20).

3. A filter according to claim 2, characterised in that the filter element (20) is of a barrel-like construction, the inlet pipe (11) communicating with the inside of the filter element (20) and the outlet pipe (12) communicating with the outside of the filter element (20);

the rotary brush extends into the inner side of the filter element (20), and the sewage discharge pipe (13) is communicated with the inner side of the filter element (20).

4. A filter according to claim 3, wherein the differential pressure detection means (40) comprises a differential pressure controller; one end of the pressure difference controller is communicated with the inner side of the filter element (20), the other end of the pressure difference controller is communicated with the outer side of the filter element (20), and the pressure difference controller is electrically connected with the controller (30).

5. The filter of claim 1, further comprising a first pressure gauge (70) and a second pressure gauge (80), wherein the first pressure gauge (70) and the second pressure gauge (80) are respectively communicated with two ends of the differential pressure detection mechanism (40).

6. The filter according to claim 2, wherein the brushing mechanism (60) further comprises a reducer (62), an input shaft of the reducer (62) is connected with a rotating shaft of the motor (61), and an output shaft of the reducer (62) is connected with the rotating brush.

7. A filter according to claim 1, characterised in that the drain (13) is also provided with a non-return valve.

8. A filter according to claim 1, wherein the filter cartridge (20) is removably mounted in the housing (10).

9. The filter of claim 1, wherein the controller (30) comprises a PLC system.

10. A filter according to claim 1, characterised in that the housing (10) is wrapped with insulation.

Technical Field

The invention relates to the technical field of drying systems, in particular to a filter.

Background

When the drying system works, the condensate can generate flocculent substances, and if the flocculent substances are not removed, the flocculent substances easily block a pipeline, so that the normal work of the drying system is influenced. To remove flocculent material and other impurities from the condensate, filters are now installed in the drying systems.

However, after the filter is used for a period of time, the filter element of the filter is full of impurities, which affects the filtering effect, and when the existing filter is cleaned, the filter needs to be cleaned by suspending the operation of the filter, which causes the discontinuity of the operation of the filter and affects the normal operation of the drying system.

Disclosure of Invention

The invention aims to provide a filter to solve the technical problem that the existing filter is discontinuous in operation.

The invention provides a filter, which comprises a shell, a controller, a pressure difference detection mechanism, an electric blowdown valve and a scrubbing mechanism, wherein the pressure difference detection mechanism, the electric blowdown valve and the scrubbing mechanism are electrically connected with the controller;

the shell is provided with a water inlet pipe, a water outlet pipe and a sewage discharge pipe, a filter element is arranged in the shell, and the electric sewage discharge valve is arranged in the sewage discharge pipe;

the two ends of the differential pressure detection mechanism are respectively communicated with the two sides of the filter element and are used for detecting a differential pressure value before and after filtration, and when the differential pressure value reaches a preset threshold value, the differential pressure detection mechanism sends a control signal to the controller;

and after receiving the control signal, the controller controls the brushing mechanism to brush the filter element, controls the electric blow-down valve to open and blow down after brushing is finished, and controls the electric blow-down valve to close after blow-down is finished.

As a further aspect of the present invention, the brushing mechanism includes a motor and a rotary brush;

the motor is arranged on the shell;

one end of the rotary brush is in transmission connection with the motor, and the other end of the rotary brush extends into the shell and can brush the filter element.

As a further scheme of the invention, the filter element is of a barrel-shaped structure, the water inlet pipe is communicated with the inner side of the filter element, and the water outlet pipe is communicated with the outer side of the filter element;

the rotary brush extends into the inner side of the filter element, and the sewage discharge pipe is communicated with the inner side of the filter element.

As a further aspect of the present invention, the differential pressure detecting mechanism includes a differential pressure controller; one end of the differential pressure controller is communicated with the inner side of the filter element, the other end of the differential pressure controller is communicated with the outer side of the filter element, and the differential pressure controller is electrically connected with the controller.

As a further scheme of the present invention, the filter further includes a first pressure gauge and a second pressure gauge, and the first pressure gauge and the second pressure gauge are respectively communicated with two ends of the differential pressure detection mechanism.

As a further aspect of the present invention, the brushing mechanism further includes a speed reducer, an input shaft of the speed reducer is connected to a rotating shaft of the motor, and an output shaft of the speed reducer is connected to the rotating brush.

As a further proposal of the invention, the sewage draining pipe is also provided with a check valve.

As a further aspect of the present invention, the filter cartridge is detachably mounted in the housing.

As a further aspect of the present invention, the controller includes a PLC system.

As a further scheme of the invention, the outer side of the shell is wrapped with an insulating layer.

By combining the technical scheme, the beneficial effects brought by the invention are analyzed as follows:

the invention provides a filter, which comprises a shell, a controller, a pressure difference detection mechanism, an electric blowdown valve and a scrubbing mechanism, wherein the pressure difference detection mechanism, the electric blowdown valve and the scrubbing mechanism are electrically connected with the controller; the shell is provided with a water inlet pipe, a water outlet pipe and a sewage discharge pipe, and a filter element is arranged inside the shell; the electric blow-down valve is arranged on the blow-down pipe and used for controlling the on-off of the blow-down valve; and two ends of the differential pressure detection mechanism are respectively communicated with two sides of the filter element and used for detecting the differential pressure value before and after filtration. When the differential pressure value reaches a preset threshold value, the differential pressure detection mechanism sends a control signal to the controller; and after receiving the control signal, the controller controls the brushing mechanism to brush the filter element, controls the electric blow-down valve to open and blow down after brushing is finished, and controls the electric blow-down valve to close after blow-down is finished. When the differential pressure value is smaller than the preset threshold value, the differential pressure detection mechanism does not send a control signal to the controller, the brushing mechanism does not work, and the electric blow-down valve is in a closed state. In the process of brushing the filter element by the brushing mechanism and in the process of opening the electric blowdown valve to discharge sewage, water in the shell can still flow from one side of the filter element to the other side, so that the filter can still continuously filter, the filter is not required to be singly paused to brush the filter element, and the filter can keep continuous motion work.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a filter according to an embodiment of the present invention;

FIG. 2 is a front view of a filter cartridge provided in accordance with an embodiment of the present invention;

fig. 3 is a top view of a filter cartridge according to an embodiment of the present invention.

Icon: 10-a housing; 11-a water inlet pipe; 12-a water outlet pipe; 13-a sewage draining pipe; 20-a filter element; 30-a controller; 40-differential pressure detection means; 50-an electric blowdown valve; 60-a brushing mechanism; 61-a motor; 62-a reducer; 70-a first pressure gauge; 80-a second pressure gauge.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention provides a filter, please refer to fig. 1 and fig. 3 in the attached drawings of the specification together.

As shown in fig. 1-3, the filter includes a housing 10, a controller 30, and a differential pressure sensing mechanism 40, an electrically powered blowoff valve 50, and a brush mechanism 60 electrically connected to the controller 30.

Be provided with inlet tube 11, outlet pipe 12 and blow off pipe 13 on the casing 10, inside is provided with filter core 20, inlet tube 11 and one side intercommunication of filter core 20, outlet pipe 12 and the opposite side intercommunication of filter core 20, and blow off pipe 13 and inlet tube 11 communicate in the same one side of filter core 20, and filter core 20 can filter the impurity of aquatic. The electric blow-down valve 50 is arranged on the blow-down pipe 13 and is used for controlling the on-off of the electric blow-down valve 50. Both ends of the differential pressure detecting mechanism 40 are respectively communicated with both sides of the filter element 20 for detecting the differential pressure value before and after filtration.

The operator can preset the threshold value to the differential pressure detecting mechanism 40 through the controller 30, or the preset threshold value in the differential pressure detecting mechanism 40 can be changed through the controller 30 according to the actual production situation.

When more impurities are accumulated on the filter element 20, the filtering efficiency of the filter element 20 is reduced; the water inlet pipe 11 continuously injects water to one side of the filter element 20, so that the water pressure of the filter element 20 at the side of the water inlet pipe 11 is increased; the filtration efficiency of the filter element 20 is reduced due to impurities, the water yield of the water outlet pipe 12 is reduced, and the water pressure of the filter element 20 at the side of the water outlet pipe 12 is reduced; which in turn results in an increased pressure differential across the cartridge 20. Therefore, by detecting the pressure difference between the two sides of the filter element 20, it can be determined whether the impurities on the filter element 20 are accumulated more and whether the filter element 20 needs to be scrubbed.

When the differential pressure value reaches a preset threshold value, the differential pressure detection mechanism 40 sends a control signal to the controller 30; after receiving the control signal, the controller 30 controls the brushing mechanism 60 to brush the filter element 20, the impurities brushed from the filter element 20 settle to the bottom of the shell 10, the sewage discharge pipe 13 is communicated with the bottom of the shell 10, after the brushing is completed, the electric sewage discharge valve 50 is controlled to open for sewage discharge, the impurities are discharged from the sewage discharge pipe 13 along with part of water, and after the sewage discharge is completed, the electric sewage discharge valve 50 is controlled to close.

When the differential pressure value is smaller than the preset threshold value, the differential pressure detection mechanism 40 does not send a control signal to the controller 30, the brushing mechanism 60 does not work, and the electric blowoff valve 50 is in a closed state.

During the brushing of the filter element 20 by the brushing mechanism 60 and the opening of the electric waste valve 50 for waste discharge, water in the housing 10 can flow from one side of the filter element 20 to the other side, so that the filter element 20 in the filter can continue to be filtered, the filter can be continuously operated without suspending the filter for brushing the filter element 20, and the filter can be continuously operated. In addition, the filter has reasonable design, small occupied area and convenient installation.

When being applied to the drying system, the filter can effectively filter impurities such as flocculent substances in the condensate of the drying system. Meanwhile, the filter can keep continuous work when the filter element 20 is cleaned, and the normal operation of the drying system is not influenced. Of course, the filter can also be used in other production facilities where filtration is required.

Fig. 1 shows a specific structure of the brush mechanism 60, and the brush mechanism 60 includes a motor 61 and a rotary brush (not shown). The motor 61 is mounted on the housing 10, and the motor 61 is electrically connected to the controller 30 and controlled by the controller 30. One end of the rotary brush is connected with the motor 61 in a transmission way, and the other end of the rotary brush extends into the shell 10 and can brush the filter element 20.

When the differential pressure value detected by the differential pressure detecting mechanism 40 is greater than a preset threshold value, the differential pressure detecting mechanism 40 sends a control signal to the controller 30; after the controller 30 receives the control signal, the controller 30 controls the motor 61 to rotate, the rotating shaft of the motor 61 drives the rotating brush to rotate, the rotating brush brushes the filter element 20, so that impurities stuck on the filter element 20 are washed away by the rotating brush, and finally the washed impurities are discharged from the sewage discharge pipe 13.

With continued reference to fig. 1, the brushing mechanism 60 further includes a speed reducer 62, an input shaft of the speed reducer 62 is connected to a rotating shaft of the motor 61, and an output shaft of the speed reducer 62 is connected to the rotating brush.

Because the housing 10 contains water, the rotating brush needs to have a large torque to overcome the resistance of the water when rotating in the water, and the rotating brush also needs to overcome the resistance caused by the impurities when brushing the impurities on the filter element 20. After the motor 61 passes through the speed reducer 62, the rotating speed is reduced, the torque is increased, the rotating brush can overcome the resistance of water and the resistance of impurities, and the filter element 20 is brushed.

The reducer 62 may be of the worm gear reducer 62, parallel shaft gear reducer 62, bevel gear reducer 62, or the like type.

Of course, in the brushing mechanism 60, in addition to the reducer 62 shown in fig. 1, in the case that the torque of the motor 61 is large and the torque of the motor 61 is enough to make the rotating brush overcome the resistance of water and the resistance of impurities, the rotating shaft of the motor 61 is directly connected to the rotating brush to drive the rotating brush to rotate without the reducer 62 in the brushing mechanism 60.

In the brushing mechanism 60 shown in fig. 1, a reducer 62 is mounted on the top of the housing 10, a housing of a motor 61 is connected to a housing of the reducer 62, a rotating shaft of the motor 61 is connected to an input shaft of the reducer 62, an output shaft of the reducer 62 extends downward, an upper end of a rotating brush is connected to the output shaft of the reducer 62, and a lower end of the rotating brush extends into the housing 10.

As shown in fig. 2 and 3, the filter element 20 is a barrel-shaped structure, the water inlet pipe 11 is communicated with the inner side of the filter element 20, the water outlet pipe 12 is communicated with the outer side of the filter element 20, the rotary brush extends into the inner side of the filter element 20, and the sewage discharge pipe 13 is communicated with the inner side of the filter element 20.

The water inside the filter element 20 flows to the outside of the filter element 20 after being filtered by the filter element 20, and most of impurities are adhered to the inner side surface of the filter element 20; when more impurities are accumulated on the filter element 20, and the differential pressure value is larger than a preset threshold value, the rotating brush is driven by the motor 61 to rotate and brush the impurities on the inner side surface of the filter element 20.

Of course, the shape of the filter element 20 is not limited to the barrel-shaped structure, the filter element 20 may also be plate-shaped, the water outlet pipe 12 is communicated with one side of the filter element 20, the water outlet pipe 12 is communicated with the other side of the filter element 20, the rotary brush is located at one side of the water outlet pipe 12, and impurities on the filter element 20 can be brushed away when the rotary brush rotates.

Specifically, as shown in fig. 1, the differential pressure detecting mechanism 40 includes a differential pressure controller 30. One end of the pressure difference controller 30 communicates with the inside of the filter element 20, the other end communicates with the outside of the filter element 20, and the pressure difference controller is electrically connected to the controller 30.

The pressure differential controller is capable of detecting the pressure differential across the filter element 20 and sending a control signal to the controller 30 when the pressure differential reaches a predetermined threshold. Further, the operator can set the threshold value of the differential pressure controller through the controller 30.

As shown in fig. 1, the filter further includes a first pressure gauge 70 and a second pressure gauge 80, and the first pressure gauge 70 and the second pressure gauge 80 are respectively communicated with two ends of the differential pressure detecting mechanism 40.

The first pressure gauge 70 and the second pressure gauge 80 can respectively display the pressure on both sides of the filter element 20, and a worker can intuitively know the pressure on both sides of the filter element 20 by observing the first pressure gauge 70 and the second pressure gauge 80.

It should be noted that, the accuracy and the measuring range of the first pressure gauge 70 and the second pressure gauge 80 may be completely the same or different, but both the first pressure gauge 70 and the second pressure gauge 80 should have a sufficient measuring range to avoid the occurrence of gauge explosion.

The drain pipe 13 is also provided with a check valve (not shown in the figure).

The check valve can prevent the sewage in the sewage discharge pipe 13 from flowing back. Specifically, the sewage flowing out of the housing 10 can be discharged after passing through the check valve, and the sewage flowing from the sewage discharge pipe 13 toward the housing 10 can be blocked by the check valve.

The filter cartridge 20 is detachably mounted in the housing 10.

After the filter element 20 is used for a long time, the filtering effect is reduced, and an operator can detach the filter element 20 from the casing 10 and install a new filter element 20 into the casing 10, so that the filtering effect of the filter is ensured.

As shown in fig. 2, a handle is disposed on the filter element 20, and when an operator detaches or installs the filter element 20, the operator can hold the filter element 20 by the handle, which facilitates detachment and installation of the filter element 20.

The Controller 30 includes a PLC (Programmable Logic Controller, Programmable Logic Controller 30) system. The PLC is a digital operation controller with a microprocessor and used for automatic control, can load control instructions into a memory at any time for storage and execution, and can be programmed according to actual needs.

An operator can preset a threshold value for the differential pressure detection mechanism 40 through a PLC system and can receive a control signal transmitted by the differential pressure detection mechanism 40; after receiving the control signal, the PLC system can control the brushing mechanism 60 to be started, control the electric blow-down valve 50 to be opened for blow-down after brushing is finished, discharge impurities along with part of water from the blow-down pipe 13, and control the electric blow-down valve 50 to be closed after blow-down is finished.

The controller 30 may be a PLC, and the controller 30 may also be a single chip microcomputer, specifically, the single chip microcomputer is electrically connected to the differential pressure detection mechanism 40, the brushing mechanism 60 and the electric blowoff valve 50, an operator can preset a threshold value for the differential pressure detection mechanism 40 through the single chip microcomputer, and the single chip microcomputer can receive a control signal transmitted from the differential pressure detection mechanism 40 to control the brushing mechanism 60 and the electric blowoff valve 50.

The controller 30 shown in fig. 1 further includes a control cabinet installed outside the housing 10, and the PLC system or the single chip microcomputer is installed in the control cabinet, so that the influence of the outside on the PLC system or the single chip microcomputer is reduced. Meanwhile, the control cabinet body can be locked, and keys are kept by special persons, so that the safe operation of the filter is ensured.

The outer side of the shell 10 is wrapped with a heat insulation layer. The heat preservation can obstruct the heat transfer between the external world and the filter, and the filter can safely operate in a high-temperature state. The heat-insulating layer can be made of glass wool, phenolic foam, aluminum silicate and other heat-insulating materials.

In addition, the high-temperature resistant 304 stainless steel material can be adopted as each component of the filter, so that the high-temperature resistant capability of the filter is further improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.