Plunger filter with bidirectional symmetrical structure

Abstract

The utility model discloses a plunger filter with a bidirectional symmetrical structure, comprising a power assembly, a plunger assembly, a box assembly and a filter assembly, wherein the power assembly is connected to the plunger assembly and to the box assembly, the filter assembly is installed in the filter cavity of the plunger of the plunger assembly, the plunger is installed in the plunger hole of the box assembly, and the plunger can move in the plunger hole along the plunger axis, and when the relative position of the plunger with the box assembly changes under the drive of the power assembly, the filtering and backwashing functions of the plunger filter are switched. The utility model changes the structure of the plunger filter, and by changing the inlet channel position and the backwash channel position of the plunger filter, it can effectively solve the problem of carbonization of stored materials in the traditional plunger filter while retaining the advantages of the traditional plunger filter such as the backwashing function and easy operation, and at the same time avoids the risk of damage to the equipment during operation.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger filters, in particular to a plunger filter with a bidirectional symmetrical structure. Background Art

[0002] In the prior art, a device for filtering fluid, such as a plunger filter with a backwashing function, comprises a cylinder, a plunger and a filter assembly for filtering. The cylinder has an inlet for introducing pre-filter fluid, an outlet for outflowing filtered fluid, at least one outlet for outflowing backwashing fluid and a hole for installing the plunger; the plunger has at least one cavity for accommodating the filter assembly, and the plunger can move in the plunger hole of the cylinder.

[0003] Since the filter is usually a metal wire woven mesh or a sintered felt mesh, the filtration efficiency of the filter will decrease after a certain period of filtration. The phenomenon manifested is that the pressure difference before and after filtration will become larger, which has a great impact on production efficiency. If the mesh is replaced, it will cause a lot of production losses. At this time, the material flows from the outlet channel into the backwash channel, and the impurities on the filter can be flushed out from the backwash channel, thereby saving a lot of resources in labor and materials.

[0004] Due to the large pressure difference during a backwash process, the inlet channel and backwash channel of the existing filter structure intersect the hole in the box (plunger position) in the tangent direction, and the position will be biased to one side, causing the plunger to rub against one side of the box. During use, the stock will be carbonized, which not only affects the subsequent spinning process but also poses a great safety hazard (for example, the material used for spinning - "green viscose" will release heat during the carbonization process, and the material working temperature is around 100°C. After the temperature rises to 130°C, it will carbonize and continue to release heat, which will produce a chain reaction). Even under the huge pressure difference between the pipeline and the backwash channel, the plunger will be directly damaged by friction with the box during backwashing, causing the plunger and the cylinder to lock, directly damaging the equipment.

[0005] The existence of the above problems limits the application of plunger filters with backwashing function. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings and defects of the prior art and to provide a plunger filter with a bidirectional symmetrical structure, aiming to solve some or all of the technical problems in the background technology existing in the plunger filter with backwashing function. By changing the box channel, the radial force exerted on the plunger in the box is balanced, the equipment is protected from damage, the influence of carbonization of accumulated materials on the subsequent spinning process is avoided, and the potential safety hazard of high temperature and high pressure in the pipeline is eliminated.

[0007] A plunger filter with a bidirectional symmetrical structure comprises a power assembly, a plunger assembly, a box assembly and a filter assembly. The power assembly is connected to the plunger assembly and to the box assembly. The filter assembly is installed in the filter cavity of the plunger of the plunger assembly. The plunger is installed in the plunger hole of the box assembly, and the plunger can move in the plunger hole along the plunger axis. When the relative position of the plunger with the box assembly changes under the drive of the power assembly, the filtering and backwashing functions of the plunger filter are switched.

[0008] Among them, the filter assembly includes four filters, and the four filters are symmetrically arranged in the filter cavity on the plunger. In conjunction with the multiple filters, four box outlet channels are arranged on the box body corresponding to the four filters, including an upper outlet channel and a lower outlet channel of the box body; corresponding to the four filters, four plunger outlet channels are correspondingly configured, including an upper outlet channel and a lower outlet channel of the plunger.

[0009] Wherein, the filter screen is symmetrical about the origin of the axis of the plunger.

[0010] Wherein, the box outlet channel is symmetrical about the origin of the axis of the plunger.

[0011] The box body is provided with four inlet channels for materials to enter the box body and for filtered fluid to enter the plunger cavity, including an upper inlet channel and a lower inlet channel, corresponding to the four filter screens.

[0012] Wherein, the inlet channel is symmetrical in direction about the origin of the axis of the plunger.

[0013] Among them, an inlet component for the material to be filtered to enter and an outlet component for the filtered material to be discharged are arranged on the box wall of the box body. When the plunger filter is in working state, the material to be filtered enters from the inlet component, passes through the filter mesh component, and is discharged from the outlet component to achieve filtering of the material.

[0014] Wherein, the inlet component includes a flange feed part, including an inlet and four outlets, the inlet is connected to the four outlets, and the four outlets are connected to four inlet channels;

[0015] The outlet assembly includes a flange discharge piece, which includes an outlet and four inlets. The outlet is connected to the four inlets, and the four inlets are connected to four box outlet channels corresponding to each other.

[0016] Among them, the box body also includes a backwash channel, including an upper backwash channel and a lower backwash channel, each of which is two, and is connected to the upper backwash outlet and the lower backwash outlet respectively. The upper backwash outlet and the lower backwash outlet are each one, corresponding to the flushing operation of the four filters.

[0017] Wherein, the backwash channel is symmetrical about the origin of the axis of the plunger.

[0018] The utility model changes the structure of the plunger filter by changing the inlet channel position and the backwash channel position of the plunger filter. On the premise of retaining the advantages of the traditional plunger filter such as backwash function and easy operation, it can effectively solve the problem of carbonization of stored materials in the traditional plunger filter and avoid the risk of damage to the equipment during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric diagram of a plunger-type filter with a bidirectional symmetrical structure of the utility model.

[0020] Figure 2-Figure 3 These are two side views of the plunger filter with a bidirectional symmetrical structure of the utility model.

[0021] Figure 4 It is a schematic diagram of material filtering operation of the plunger filter of the utility model.

[0022] Figure 5 The utility model is a schematic diagram of the backwashing operation of the filter screen at the top of the plunger filter.

[0023] Figure 6 It is a schematic diagram of the backwashing operation of the filter screen at the bottom of the plunger filter of the utility model.

[0024] Figure 7-10 These are four schematic diagrams of the box of the plunger filter of the utility model, wherein: Figure 7 This is the main perspective view of the box. Figure 8 yes Figure 7 BB line profile, Fig. 9 yes Figure 7 X-direction view, Fig.10 yes Fig. 9 CC line profile.

[0025] Figure 11-13 These are three schematic diagrams of the plunger of the box assembly of the utility model, wherein: Fig.13 yes Fig.11 AA line section diagram, Fig.12 yes Fig.11 Side view of. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Figure 1 , Figure 2 as well as Figure 3 They are respectively an axonometric view of the plunger filter of the utility model with a bidirectional symmetrical structure and two side views of the appearance.

[0028] As shown in the figure, the plunger filter of the utility model has a bidirectional symmetrical structure, including a power component 1, a plunger component 3, a box component 4 and a filter component 10. The power component 1 is connected to the plunger component 2 and to the box component 3. The filter component 10 is installed in the filter cavity 14-3 of the plunger of the plunger component 3. The plunger is installed in the plunger hole of the box component 3, and the plunger can move in the plunger hole along the plunger axis. When the relative position of the plunger with the box of the box component 3 changes under the drive of the power component 1, the filtering and backwashing functions of the plunger filter are switched.

[0029] In the present application, the filter assembly is installed in the filter cavity 14-3 of the plunger, the plunger is installed in the plunger hole of the box assembly, and the plunger can move in the plunger hole along the plunger axis. When the relative position of the plunger and the box changes, the filter filtering and backwashing functions can be switched.

[0030] The power assembly can be a linear drive mechanism, such as a linear drive cylinder or oil cylinder, etc., mounted on a mounting plate 9, the mounting plate 9 is connected to four columns 8, and the columns are connected to the upper end of the box, such as Figure 1 As shown, the power assembly 2 is supported, and the driving rod (such as a piston rod) of the power assembly 1 is connected to the plunger assembly 2 to drive the plunger assembly to move.

[0031] In some embodiments, an inlet component 5 for the material to be filtered to enter and an outlet component 4 for the filtered material to be discharged are arranged on the wall of the box body. When the plunger filter is in working state, the material to be filtered enters from the inlet component, passes through the filter mesh component, and is discharged from the outlet component to achieve filtering of the material.

[0032] In some embodiments, the filter assembly includes four filters, which are symmetrically arranged in the filter cavity on the plunger, such as Figure 4 , Figure 5 as well as Figure 6 As shown, in conjunction with the plurality of filter screens, the box body is provided with two upper outlet channels 13-1 and two lower outlet channels 13-2, respectively, corresponding to the four filter screens, and correspondingly configured upper outlet channels 14-1 and lower outlet channels 14-2 of the plunger, respectively, two, corresponding to the four filter screens.

[0033] In some embodiments, the housing is provided with two upper inlet channels 12-1 and two lower inlet channels 12-2, each of which is symmetrically arranged to correspond to the four filter screens, forming an inlet channel for the fluid to be filtered to enter the plunger cavity.

[0034] Specifically, when the filter is working, the upper inlet channel and the upper outlet channel of the box are connected to the corresponding upper outlet channel of the plunger, and the lower inlet channel and the lower outlet channel of the box are connected to the corresponding lower outlet channel of the plunger, each corresponding to a filter screen to form a channel for material to enter and flow out, that is, the plunger filter of the present application includes four filter channels, corresponding to four filter screens, and one filter screen is one filter channel.

[0035] In some embodiments, the inlet component includes a flange feed component, which includes an inlet 51 and four outlets (not shown). This is a flange feed component of the prior art known in the art and will not be described in detail. The inlet is connected to the four outlets, and the four outlets correspond to four connected inlet channels. The outlet component includes a flange outlet component, which includes an outlet 41 and four inlets (not shown). This is a flange outlet component of the prior art known in the art and will not be described in detail. The outlet is connected to the four inlets, and the four inlets correspond to four connected box outlet channels.

[0036] In some embodiments, the box body also includes a backwash channel, including an upper backwash channel 11-1 and a lower backwash channel 11-2, each of which is two and connected to the upper backwash outlet and the lower backwash outlet respectively. The upper backwash outlet and the lower backwash outlet are each for flushing four filters.

[0037] Figure 4 This is a schematic diagram of the filtration operation of the bidirectional symmetrical plunger filter of the utility model. In the working position, the fluid to be filtered enters the plunger cavity from the inlet channel (including the upper inlet channel and the lower inlet middle channel), passes through the filter screen of the filter screen assembly, enters the plunger outlet channel (including the plunger upper outlet channel, the plunger lower outlet channel), and the box outlet channel (including the box upper outlet channel, the box lower outlet channel), completing the working process of fluid filtration. Figure 4 There are four filters in the filter assembly performing filtering work at the same time.

[0038] In some embodiments, when the pre-filter fluid to be filtered enters the box for filtration, it first enters the plunger cavity, passes through the filter of the filter assembly, and then flows out of the filter, reaches the box outlet channel through the plunger outlet channel, and then flows out, thereby achieving filtration.

[0039] Figure 5This is a schematic diagram of the backwashing of the upper filter screen of the plunger filter of the utility model. When the upper filter screen is backwashed, the plunger moves upward as shown in the figure, so that the two upper filter screens are connected to the two upper backwashing channels, and the fluid to be filtered enters from the two upper outlet channels of the box body, enters the plunger cavity, passes through the two upper filter screens of the filter screen assembly, and enters the two upper backwashing channels for discharge, completing the backwashing process of the upper filter screen. When the upper filter screen is backwashed, the two lower filter screens are still in the filtering state at the same time.

[0040] Figure 6 This is a schematic diagram of the backwashing of the lower filter screen of the plunger filter of the utility model. When the lower filter screen is backwashed, the plunger moves downward as shown in the figure, so that the two lower filter screens are connected to the two lower backwashing channels. The fluid to be filtered enters the plunger cavity from the two lower outlet channels of the box body, passes through the two lower filter screens of the filter assembly, enters the two lower backwashing channels and is discharged, completing the working process of the lower filter screen. When the lower filter screen is backwashed, the two upper filter screens are still in the filtering state.

[0041] In the present application, during backwashing, after the plunger position moves to a predetermined position (such as an upper backwash position or a lower backwash position) relative to the position of the casing, the inlet channel on the casing and the cavity of the plunger are separated, and the pre-filtration fluid cannot enter the plunger cavity, but the concave cavity of the plunger and the outlet channel of the casing are still connected.

[0042] Since the filtered fluid has a certain pressure, a pressure difference is formed between the concave cavity of the plunger and the outlet of the backwash channel of the backwash fluid. During backwashing, when the fluid from the outlet channel of the box enters the filter screen of the filter assembly, the flow direction of the backwash fluid through the filter screen is opposite to the flow direction during filtration, thereby flushing away the impurities on the filter screen and achieving backwashing; the backwash fluid carrying the filtered impurities flows into the plunger cavity and flows out through the backwash channel, achieving backwashing of the filter screen.

[0043] During the entire backwashing process, because the inlet channels of each two groups are symmetrical with the backwash channels in direction about the origin of the axis of the plunger, the lateral forces generated by the pressure differences of the flow channels are completely offset.

[0044] Among them, a backwash channel valve is installed in the backwash channel outlet of the box body, and an inlet channel valve is installed in the inlet channel of the box body. This is an existing well-known technology and will not be described in detail.

[0045] The plunger filter with a bidirectional symmetrical structure of the embodiment of the utility model changes the channel of the box body so that during backwashing, there is a pressure difference between the two symmetrical and completely opposite inlet channels and the backwash channel through the pressure in the pipeline itself and the internal pressure of the pipeline and the backwash channel, so that the radial force exerted on the plunger in the hole of the box body is balanced. While ensuring that the material can lubricate the plunger when it moves, it also avoids serious friction between the plunger and the box body due to the lateral force generated by the pressure difference, thereby avoiding damage to the equipment.

[0046] In addition, during the processing, the material will not be carbonized because the plunger squeezes the box and cannot flow, which avoids the impact on subsequent spinning production, and also avoids the continuous carbonization of the material in the pipeline, and even the safety hazards of high temperature and high pressure caused by chain reactions.

[0047] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0048] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plunger filter with a bidirectional symmetrical structure, characterized in that: It includes a power component, a plunger component, a box component and a filter component. The power component is connected to the plunger component and the box component. The filter component is installed in the filter cavity of the plunger of the plunger component. The plunger is installed in the plunger hole of the box component, and the plunger can move in the plunger hole along the plunger axis. When the relative position of the plunger with the box component changes under the drive of the power component, the filtering and backwashing functions of the plunger filter are switched.

2. The plunger filter with bidirectional symmetric structure according to claim 1, characterized in that: The filter assembly includes four filters, which are symmetrically arranged in the filter cavity on the plunger. In combination with the plurality of filters, the box body is provided with four box body outlet channels corresponding to the four filters, including an upper box body outlet channel and a lower box body outlet channel. Corresponding to the four filter screens, four plunger outlet channels are configured correspondingly, including an upper plunger outlet channel and a lower plunger outlet channel.

3. The plunger filter with a bidirectional symmetrical structure according to claim 2 is characterized in that: The filter screen is symmetrical about the origin of the axis of the plunger.

4. The plunger filter with a bidirectional symmetrical structure according to claim 3 is characterized in that: The box outlet passage is symmetrical about the origin of the axis of the plunger.

5. The plunger filter with a bidirectional symmetrical structure according to claim 4, characterized in that: The box body is provided with four inlet channels for materials to enter the box body and for filtered fluid to enter the plunger cavity, including an upper inlet channel and a lower inlet channel, corresponding to the four filter screens.

6. The plunger filter with a bidirectional symmetrical structure according to claim 5, characterized in that: The inlet passage is directionally symmetrical about the origin of the axis of the plunger.

7. The plunger filter with a bidirectional symmetrical structure according to claim 6, characterized in that: An inlet assembly for the entry of filtered materials and an outlet assembly for the discharge of filtered materials are arranged on the box wall of the box body. When the plunger filter is in working state, the material for filtration enters from the inlet assembly, passes through the filter mesh assembly, and is discharged from the outlet assembly to achieve filtering of the material.

8. The plunger filter with a bidirectional symmetrical structure according to claim 7, characterized in that: The inlet assembly includes a flange feed component, including an inlet and four outlets, the inlet is connected to the four outlets, and the four outlets are connected to four inlet channels; The outlet assembly includes a flange discharge piece, which includes an outlet and four inlets. The outlet is connected to the four inlets, and the four inlets are connected to four box outlet channels corresponding to each other.

9. The plunger filter with a bidirectional symmetrical structure according to claim 8, characterized in that: The box body also includes a backwash channel, including an upper backwash channel and a lower backwash channel, each of which is two and connected to the upper backwash outlet and the lower backwash outlet respectively. The upper backwash outlet and the lower backwash outlet are each one, corresponding to the four filter screens for flushing operations.

10. The plunger filter with a bidirectional symmetrical structure according to claim 9, characterized in that: The backwash channel is symmetrical about the origin of the axis of the plunger.

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