Negative pressure type self-cleaning filter capable of uniformly cleaning

Abstract

The negative pressure type self-cleaning filter is characterized in that a cylindrical hollow filter cylinder is fixedly arranged right above a base, the outer side of the filter cylinder is sequentially communicated with a water inlet pipe, a return pipe, a water outlet pipe and a blow-down valve from bottom to top, the other end of the return pipe is communicated with the water inlet pipe, the blow-down valve is provided with an electromagnetic valve A, and the electromagnetic valve A is communicated with the water outlet pipe. And the differential pressure switch is fixedly arranged at any position outside the filter cylinder. According to the self-cleaning filter, the backflow pipe is arranged between the water inlet pipe and the water outlet pipe on the basis of the structure of a traditional self-cleaning filter, so that sewage entering the filter through the water inlet pipe flows back through manual setting after being primarily filtered, the primary filtering process is achieved under the condition that the general structure of equipment is not changed, and then the filtering efficiency is improved; in addition, macromolecular pollutants in the sewage can be effectively deposited in the multi-time primary filtering process, manual operation of the self-cleaning filter is reduced, and the labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of cleaning filters, in particular to a negative pressure type self-cleaning filter with uniform cleaning. BACKGROUND

[0002] The self-cleaning filter is a precision device for purifying water quality and protecting normal work of other devices in the system, which directly intercepts impurities in water by using a filter screen, removes suspended solids and particulate matter in water, reduces turbidity, purifies water quality, and reduces system dirt, bacteria, algae, corrosion, etc. to purify water quality and protect normal work of other devices in the system. Water enters the self-cleaning filter body from the water inlet. Due to intelligent (PLC, PAC) design, the system can automatically identify the degree of impurity deposition and automatically fully discharge the sewage valve signal. The self-cleaning filter can automatically clean and filter and automatically discharge sewage without external energy during operation and control. During backwashing, the water continuously flows, the cleaning and filtering period can be adjusted, the self-cleaning filtering time is set to 10-60 / s by default, and the water loss during cleaning and filtering is only 0.08-0.6% of the filtered water. The filtering accuracy can reach 10-3000 microns. The working pressure can reach 1.0-1.6 Mpa. The single flow rate is 4-4160 m / h. It can be installed in any direction and position in vertical, horizontal and inverted positions, and can be used for water filtration in various industries such as industry, agriculture, municipal power, electronics, medicine, food, printing and dyeing, construction, steel, metallurgy and papermaking.

[0003] However, in actual operation, when the automatic water filter is put into automatic mode, differential pressure switch control or timed cleaning is adopted. If the sewage discharge time is long, the backwater pressure will be greatly reduced due to excessive sewage discharge, and in severe cases, cavitation of the heat network pump will occur. If the sewage discharge time is short, the backwashing effect is poor. The leakage of the sewage discharge pipeline valve frequently occurs due to frequent backwashing of the filter screen, and the buried pipe of the sewage discharge pipeline is more, which is difficult to monitor. Once leakage occurs, it is difficult to find out, causing great waste. In the past work, in order to ensure the stable operation of the pipe network, the sewage discharge electric door is throttled, and the self-cleaning filter is operated manually. This requires a large amount of manual labor, greatly increasing the labor cost. Practical new type content

[0004] In view of the above problems, the bait conveying structure is provided to solve the problem that the bait cannot be quantitatively conveyed.

[0005] The embodiment of the application provides a negative pressure type self-cleaning filter with uniform cleaning, which comprises a base, a filter cylinder, a water inlet pipe, a water outlet pipe, a backflow pipe, a differential pressure switch, a control pipeline, a blowdown valve and an electromagnetic valve A, the base is disc-shaped, a cylindrical hollow filter cylinder is fixedly arranged above the base, a water inlet pipe, a backflow pipe, a water outlet pipe and a blowdown valve are sequentially and communicatively arranged on the outer side of the filter cylinder from bottom to top, the other end of the backflow pipe is in communication with the water inlet pipe, the blowdown valve is provided with the electromagnetic valve A, the differential pressure switch is fixedly arranged at any position on the outer side of the filter cylinder, and the differential pressure switch is electrically connected with the electromagnetic valve A through the control pipeline.

[0006] In some embodiments, an electromagnetic valve B is arranged on the water outlet pipe, and the electromagnetic valve B is electrically connected with the differential pressure switch through the control pipeline.

[0007] In some embodiments, an electromagnetic valve C is arranged on the backflow pipe, and the electromagnetic valve C is electrically connected with the differential pressure switch through the control pipeline.

[0008] In some embodiments, a coarse filter screen is arranged at the lower section of the internal cavity of the filter cylinder, the opening position of the water inlet pipe corresponds to the arrangement position of the coarse filter screen, a fine filter screen is arranged at the upper section of the internal cavity of the filter cylinder, and the opening positions of the water outlet pipe and the backflow pipe correspond to the arrangement position of the fine filter screen.

[0009] In some embodiments, the filter cylinder is further provided with a water motor, a driving shaft of the water motor extends into the inner cavity of the filter cylinder, a stirring rod is fixedly arranged on the driving shaft, the front end of the stirring rod corresponds to the opening position of the backflow pipe, and the water motor is electrically connected with the differential pressure switch through the control pipeline.

[0010] In some embodiments, a plurality of groups of stirring paddles are arranged on the stirring rod, and a group of tooth plates is arranged at the upper end and the lower end of the stirring paddles, respectively.

[0011] The above description is only a summary of the technical scheme of the embodiment of the application, in order to more clearly understand the technical means of the embodiment of the application, the embodiment of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the embodiment of the application more obvious and easy to understand, the following specific embodiment of the application is described.

[0012] 1. The utility model discloses a self-cleaning filter of traditional structure is improved, and the backflow pipe is arranged between the water inlet pipe and the water outlet pipe, so that the sewage in the filter is backflowed after primary filtration, the primary filtration process is realized without changing the general structure of the equipment, the filtration efficiency is improved, and the macromolecular pollutants in the sewage are effectively deposited in the multiple primary filtration process, so that the labor of manually cleaning the self-cleaning filter is reduced, and the labor cost is reduced.

[0013] 2、In the water outlet pipe and the return pipe are provided with solenoid valve can according to the current actual situation through the filter process intervention, further strengthen the efficiency of sewage filtration.

[0014] 3、In the self-cleaning filter in the utility model is internally provided with stirring equipment, can effectively stabilize the flow state of internal liquid, makes the equipment after long time use water body's hardening deposit reply reduces, further prolongs personnel maintenance cycle. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will be a simple introduction to the drawings needed to be used in the embodiment description, obviously, the drawings in the following description is some embodiments of the present application, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0016] Figure 1 It is the structural schematic diagram of the utility model.

[0017] Figure 2 It is the filter cylinder cavity structure schematic diagram of the utility model.

[0018] Figure 3 It is the electrical control schematic diagram of the utility model.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 1, base; 2, filter cylinder; 3, water inlet pipe; 4, water outlet pipe; 5, return pipe; 6, differential pressure switch; 7, control pipeline; 8, water motor; 9, blowdown valve; 10, solenoid valve A; 11, solenoid valve B; 12, solenoid valve C; 13, coarse filter screen; 14, fine filter screen; 15, stirring rod; 16, stirring paddle; 17, tooth plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will be combined with the drawings in the embodiments of the present application, the technical scheme in the embodiments of the present application is clearly and completely described, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] The terms "include" and "have" and any variation thereof in the specification and claims of the present application and the description of the drawings are intended to cover without excluding other contents. The word "one" or "a" does not exclude the presence of multiple. Unless otherwise stated, the meaning of "multiple" is two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups).

[0023] The positional words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the present application. For example, in the description of the present application, the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, the expressions of the indicated directions for describing the operation and structure of each component of the present embodiment, such as the x direction, the Y direction and the Z direction, are not absolute but relative, and although the indications are appropriate when each component is in the position shown in the drawings, the directions should be interpreted differently to correspond to the changes when the positions are changed.

[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, the "connection" or "connection" of mechanical structure can mean physical connection, such as fixed connection, detachable connection or integral connection. The "connection" or "connection" of the circuit structure can mean not only physical connection, but also electrical connection or signal connection, for example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0027] The present application provides a negative pressure self-cleaning filter with uniform cleaning, such as Figure 1As shown, including base 1, filter cylinder 2, water inlet pipe 3, water outlet pipe 4, backflow pipe 5, differential pressure switch 6, control pipeline 7, blowdown valve 9 and solenoid valve A10, base 1 is disc-shaped, the top of base 1 is fixedly provided with a cylindrical hollow filter cylinder 2, the outer side of filter cylinder 2 is sequentially communicated with water inlet pipe 3, backflow pipe 5, water outlet pipe 4 and blowdown valve 9 from bottom to top, the other end of backflow pipe 5 is communicated with water inlet pipe 3, solenoid valve A10 is arranged on blowdown valve 9, differential pressure switch 6 is fixedly arranged at any position on the outer side of filter cylinder 2, differential pressure switch 6 is electrically connected with solenoid valve A10 through control pipeline 7. On the basis of the structure of the conventional self-cleaning filter, the backflow pipe is arranged between the water inlet pipe and the water outlet pipe, so that the sewage entering the filter through the water inlet pipe is backflowed after primary filtration, thereby realizing the primary filtration process without changing the general structure of the equipment, further improving the filtration efficiency, and the macromolecular pollutants in the sewage can be effectively deposited in the multiple primary filtration process, reducing the manual operation of the self-cleaning filter and reducing the labor cost.

[0028] And water outlet pipe 4 is provided with solenoid valve B11, solenoid valve B11 is electrically connected with differential pressure switch 6 through control pipeline 7. Solenoid valve C12 is arranged on backflow pipe 5, solenoid valve C12 is electrically connected with differential pressure switch 6 through control pipeline 7. The operator can intervene in the filtration process according to the current actual situation, further enhancing the efficiency of sewage filtration.

[0029] As shown in Figure 2 The lower segment of the internal cavity of filter cylinder 2 is provided with a coarse filter screen 13, the opening position of water inlet pipe 3 corresponds to the arrangement position of coarse filter screen 13, the upper segment of the internal cavity of filter cylinder 2 is provided with a fine filter screen 14, the opening positions of water outlet pipe 4 and backflow pipe 5 correspond to the arrangement position of fine filter screen 14.

[0030] And filter cylinder 2 is further provided with a water motor 8, the driving shaft of water motor 8 extends into the inner cavity of filter cylinder 2, a stirring rod 15 is fixedly arranged on the driving shaft, the front end of stirring rod 15 corresponds to the opening position of backflow pipe 5, water motor 8 is electrically connected with differential pressure switch 6 through control pipeline 7.

[0031] And a plurality of groups of stirring paddles 16 are arranged on stirring rod 15, a group of toothed plates 17 is arranged at the upper end and the lower end of stirring paddles 16 respectively. The flow state of the internal liquid can be effectively stabilized, so that the hardening deposits of the water body are reduced after long-time use of the equipment, further prolonging the maintenance cycle of the personnel.

[0032] Working principle: when using, through the water inlet pipe 3, the sewage to be treated is put into the equipment, the sewage can be directly filtered by the coarse filter screen 13, when the treated water comes to the backflow pipe 5, the operator can adjust the current state of the electromagnetic valve B11 and the electromagnetic valve C12 according to the current purification requirement of the sewage, so as to realize whether the treated water flows back to the water inlet pipe 3 through the backflow pipe 5, or directly discharges from the water outlet pipe 4, and by Figure 3 It can be seen that the current state of the electromagnetic valve A10 and the water motor 8 can be controlled by the pressure difference switch 6 at the same time to achieve the expected effect of the operator, effectively improving the overall working efficiency of the equipment.

[0033] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means to be within the scope of the application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0034] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A negative pressure self-cleaning filter which is cleaned uniformly, characterized in that, The utility model provides a filter device, including base (1), filter cylinder (2), water inlet pipe (3), water outlet pipe (4), backflow pipe (5), differential pressure switch (6), control pipeline (7), blowdown valve (9) and solenoid valve A (10), base (1) is discoid, and the hollow filter cylinder (2) of cylinder is fixedly arranged on the top of base (1), the outer side of filter cylinder (2) is sequentially communicated water inlet pipe (3), backflow pipe (5), water outlet pipe (4) and blowdown valve (9) from bottom to top, the other end of backflow pipe (5) is communicated with water inlet pipe (3), solenoid valve A (10) is arranged on blowdown valve (9), differential pressure switch (6) is fixedly arranged on the outer side of filter cylinder (2) in any position, and differential pressure switch (6) is electrically connected with solenoid valve A (10) through control pipeline (7).

2. The self-cleaning filter according to claim 1, wherein Solenoid valve B (11) is arranged on water outlet pipe (4), and solenoid valve B (11) is electrically connected with differential pressure switch (6) through control pipeline (7).

3. The self-cleaning filter according to claim 1, wherein Solenoid valve C (12) is arranged on backflow pipe (5), and solenoid valve C (12) is electrically connected with differential pressure switch (6) through control pipeline (7).

4. The self-cleaning filter according to claim 1, wherein The lower section of the internal cavity of filter cylinder (2) is provided with a coarse filter screen (13), and the opening position of water inlet pipe (3) corresponds to the setting position of coarse filter screen (13); the upper section of the internal cavity of filter cylinder (2) is provided with a fine filter screen (14), and the opening positions of water outlet pipe (4) and backflow pipe (5) correspond to the setting position of fine filter screen (14).

5. The self-cleaning filter according to claim 1, wherein The filter cylinder (2) is also provided with a water motor (8), the drive shaft of the water motor (8) extends into the inner cavity of the filter cylinder (2), a stirring rod (15) is fixedly arranged on the drive shaft, the front end of the stirring rod (15) corresponds to the opening position of the backflow pipe (5), and the water motor (8) is electrically connected with the differential pressure switch (6) through the control pipeline (7).

6. The self-cleaning filter according to claim 5, wherein A plurality of groups of stirring paddles (16) are arranged on the stirring rod (15), and a group of toothed plates (17) is arranged at the upper end and the lower end of the stirring paddles (16) respectively.

Images