Multi-functional screen changer

Abstract

The application discloses a multifunctional screen changer, which comprises a screen changer main body and a plunger, the screen changer main body is provided with a plunger cavity, the plunger is matched and arranged in the plunger cavity, the driving end of the plunger is connected with a hydraulic cylinder, the screen changing end of the plunger can be axially moved and extended out of the plunger cavity, and the screen changing end of the plunger is provided with a filter cavity, the filter cavity is provided with a first filter assembly and a second filter assembly which are distributed in a radial direction, the outer sides of the two filter assemblies form a first pre-filter channel and a second pre-filter channel respectively, and the inner sides of the two filter assemblies jointly form a post-filter channel, the screen changer main body and the plunger are provided with a first liquid inlet channel and a second liquid inlet channel which are matched and arranged and respectively lead the first pre-filter channel and the second pre-filter channel, and the screen changer main body and the plunger are provided with a liquid outlet channel which is matched and arranged and leads the post-filter channel. The plunger of the application realizes double-station filtration, has a large filtration area and has an online backwashing function.

Description

Technical Field

[0001] This invention relates to an improved invention of a screen switcher, and more particularly to an improved invention of a multifunctional screen switcher. Background Technology

[0002] Traditional screen changers consist of a screen changer body and a plunger. The plunger has a filter chamber, and a set of filter components is installed in the filter chamber. Pre-filtration channels and post-filtration channels are formed on the front and back sides of the filter components, respectively. The raw liquid enters through the pre-filtration channel, is filtered by the filter components, and is discharged through the post-filtration channel to complete the filtration. To increase the filtration area, multiple plungers are usually set up for coordinated filtration. However, increasing the number of plungers undoubtedly increases the size and cost of the equipment. At the same time, the filter components need to be replaced and cleaned by moving the plungers outward, and it does not have an online cleaning function. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multifunctional screen changer with a large filtration area and online backwashing function.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This multifunctional screen changer includes a screen changer body and a plunger. The screen changer body has a plunger cavity, and the plunger is matched and disposed within the plunger cavity. The driving end of the plunger is connected to a hydraulic cylinder, and the screen changing end of the plunger can move axially out of the plunger cavity. The screen changing end of the plunger has a filter cavity, within which are radially spaced first and second filter components. The outer sides of the two filter components respectively form a first pre-filter channel and a second pre-filter channel, and the inner sides of the two filter components together form a post-filter channel. The screen changer body and the plunger are fitted with a first liquid inlet channel and a second liquid inlet channel respectively connecting the first pre-filter channel and the second pre-filter channel. The screen changer body and the plunger are fitted with a liquid outlet channel connecting the post-filter channel.

[0005] The screen changer body is provided with a first liquid guide hole, a second liquid guide hole and a third liquid guide hole, and the plunger is provided with a fourth liquid guide hole. One end of the fourth liquid guide hole is connected to the second pre-filter channel. One end of the first liquid guide hole, the second liquid guide hole and the third liquid guide hole are all connected to the flange cover provided on one side of the screen changer body and communicate with each other. The other end of the third liquid guide hole is located on the liquid inlet end face of the screen changer. When the two sets of filter components work at the same time, the other end of the first liquid guide hole is connected to the first pre-filter channel. The corresponding first liquid guide hole and the third liquid guide hole constitute the first liquid inlet channel. The other end of the second liquid guide hole is connected to the other end of the fourth liquid guide hole, and then connected to the second pre-filter channel. The corresponding second liquid guide hole, the fourth liquid guide hole and the third liquid guide hole constitute the second liquid inlet channel.

[0006] Both the first and second filter components include a filter screen, a support mesh disposed on the inner and outer sides of the filter screen, and a porous pressure plate. The porous pressure plate is provided with a waste discharge guide groove, and the corresponding screen changer body is provided with a waste discharge hole. When the first filter component is backwashed, the other end of the corresponding first liquid guide hole connects to the other end of the fourth liquid guide hole, and then connects to the second pre-filter channel. At this time, the other end of the second liquid guide hole is closed, and the waste discharge guide groove of the porous pressure plate of the first filter component connects to the corresponding waste discharge hole. When the second filter component is backwashed, the other end of the corresponding second liquid guide hole connects to the first pre-filter channel. The other end of the first liquid guide hole is closed or both are connected to the first pre-filter channel. The waste discharge guide groove of the porous pressure plate of the second filter component connects to the waste discharge hole.

[0007] The waste discharge guide channel is located on the bottom surface of the porous pressure plate that is biased towards the outside, and extends to the adjacent outer surface of the porous pressure plate.

[0008] The screen changer body is equipped with an inlet / outlet adapter, which has a first flow channel and a second flow channel that are staggered with each other. The inlet of the first flow channel is located at one end of the inlet / outlet adapter and the first flow channel is connected to the inlet channel. The outlet of the second flow channel is located at the other end of the inlet / outlet adapter and the second flow channel is connected to the outlet channel.

[0009] The plunger has four plungers arranged in a matrix and shares the same inlet / outlet adapter. The corresponding inlet / outlet adapter is arranged horizontally between the two upper plungers and the two lower plungers and is perpendicular to each plunger.

[0010] The plunger screen changing end is equipped with a clamping cylinder on its outer side. The clamping cylinder has an axial opening and is equipped with a wrench-type locking structure. The clamping cylinder is suspended on the bracket by a telescopic rope.

[0011] The beneficial effects of this invention are that the improved multifunctional screen changer has two sets of filter components installed in the filter chamber of the plunger, which participate in the filtration work simultaneously to achieve dual-station filtration. It is preferably set to four columns and eight stations, with a large filtration area and small volume. The material passes through the filtration system in a short time, ensuring product quality, and the filtration system does not affect the normal operation of the production line when changing screens. At the same time, the two sets of filter components have a backwashing function, that is, one set of filter components is stopped and the original liquid filtered by the other set of filter components is used to rinse the stopped set of filter components. The waste liquid after rinsing is discharged externally, realizing the online cleaning function and reducing the number of screen changes. Attached Figure Description

[0012] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a side view of the structure of the present invention.

[0015] Figure 3 This is a structural diagram of the plunger assembly of the present invention.

[0016] Figure 4 For the present invention Figure 3 AA sectional view.

[0017] Figure 5 For the present invention Figure 3 BB cross-sectional view. Detailed Implementation

[0018] The accompanying drawings illustrate the structure of the present invention, and further details will be described below in conjunction with the drawings. In this embodiment, see the attached drawings. Figure 1-5 The multifunctional screen changer includes a screen changer body 1 and a plunger 2. The screen changer body 1 is provided with a plunger cavity, and the plunger 2 is matched and disposed in the plunger cavity. The driving end of the plunger 2 is connected to a hydraulic cylinder 3. The screen changing end of the plunger 2 can move axially and extend out of the plunger cavity. The screen changing end of the plunger 2 is provided with a filter cavity 4. The filter cavity 4 is provided with a first filter assembly 5 and a second filter assembly 6 arranged radially at intervals. The outer sides of the two filter assemblies respectively form a first pre-filter channel 7 and a second pre-filter channel 8. The inner sides of the two filter assemblies together form a post-filter channel 9. The screen changer body 1 and the plunger 2 are provided with a first liquid inlet channel and a second liquid inlet channel respectively connecting the first pre-filter channel 7 and the second pre-filter channel 8. The screen changer body 1 and the plunger 2 are provided with a liquid outlet channel connecting the post-filter channel 9.

[0019] The working principle of this invention is as follows: the raw liquid enters the first pre-filtration channel 7 through the first inlet channel, is filtered by the first filter component 5, enters the post-filtration channel 9, and is finally discharged through the outlet channel. At the same time, the raw liquid enters the second pre-filtration channel 8 through the second inlet channel, is filtered by the second filter component 6, enters the post-filtration channel 9, and is finally discharged through the outlet channel. This achieves dual-station filtration in one column, increases the filtration area, improves filtration efficiency, and has a compact structure with high utilization.

[0020] As a further improved embodiment, the screen changer body 1 is provided with a first liquid guiding hole 10, a second liquid guiding hole 11, and a third liquid guiding hole 12, with the first liquid guiding hole 10 and the second liquid guiding hole 11 distributed on the left and right sides. The plunger 2 is provided with a fourth liquid guiding hole 13, one end of which is connected to the second pre-filter channel 8. One end of each of the first liquid guiding hole 10, the second liquid guiding hole 11, and the third liquid guiding hole 12 is connected to a flange cover 14 provided on one side of the screen changer body 1, and they are interconnected. The flange cover 14 is sealed and installed on the screen changer body. On the screen body 1, the other end of the third liquid guide hole 12 is located on the liquid inlet end face of the screen body 1. When the two sets of filter components work at the same time, the other end of the first liquid guide hole 10 is connected to the first pre-filter channel 7. The corresponding first liquid guide hole 10 and third liquid guide hole 12 constitute the first liquid inlet channel. The other end of the second liquid guide hole 11 is connected to the other end of the fourth liquid guide hole 13, and then connected to the second pre-filter channel 8. The corresponding second liquid guide hole 11, fourth liquid guide hole 13 and third liquid guide hole 12 constitute the second liquid inlet channel.

[0021] As a further improved specific implementation, both the first filter assembly 5 and the second filter assembly 6 include a filter screen 15 and a support mesh 16 and a porous pressure plate 17 disposed on the inner and outer sides of the filter screen 15. The porous pressure plate 17 is provided with a waste discharge guide groove 18, and the corresponding screen changer body 1 is provided with a waste discharge hole 19. The waste discharge hole 19 is located on the moving path of the porous pressure plate 17 and cooperates with the waste discharge guide groove 18. When the first filter assembly 5 is backwashed, the plunger 2 is driven to move to the left by the hydraulic cylinder 3. The other end of the corresponding first liquid guide hole 10 is connected to the other end of the fourth liquid guide hole 13, and then connected to the second pre-filter channel 8. The other end of the second liquid guide hole 11 is closed by the outer circle of the plunger 2. The waste discharge guide groove 18 of the porous pressure plate 17 of the first filter assembly 5 is connected to the corresponding waste discharge hole 19. After being filtered by the second filter assembly 6 Part of the raw liquid is discharged through the outlet channel 20, and part of it washes the first filter assembly 5 and flows back to the first pre-filter channel 7. The slag on the first filter assembly 5 is discharged through the waste discharge guide 18 and the waste discharge hole 19. When the second filter assembly 6 is backwashed, the plunger 2 is driven to the right by the hydraulic cylinder 3. The other end of the corresponding second guide hole 11 is connected to the first pre-filter channel 7. The other end of the first guide hole 10 is closed by the outer circle of the plunger 2 or is connected to the first pre-filter channel 7. The waste discharge guide 18 of the porous pressure plate 17 of the second filter assembly 6 is connected to the waste discharge hole 19. Part of the raw liquid filtered by the first filter assembly 5 is discharged through the outlet channel 20, and part of it washes the second filter assembly 6 and flows back to the second pre-filter channel 8. The slag on the second filter assembly 6 is discharged through the waste discharge guide 18 and the waste discharge hole 19.

[0022] As a further improved specific implementation, the waste discharge guide trough 18 is located on the bottom surface of the porous pressure plate 17 that is biased towards the outside, and extends to the adjacent outer surface of the porous pressure plate 17, so as to reasonably guide the slag material in the pre-filter channel to be discharged.

[0023] As a further improved specific implementation, the screen changer body 1 is equipped with an inlet / outlet adapter. The inlet / outlet adapter 21 is provided with a first flow channel and a second flow channel that are staggered with each other. The inlet of the first flow channel is located at one end of the inlet / outlet adapter 21 and is equipped with an inlet flange. The first flow channel is connected to the inlet channel. The outlet of the second flow channel is located at the other end of the inlet / outlet adapter 21 and is equipped with an outlet flange. The second flow channel is connected to the outlet channel 20.

[0024] As a further improved specific implementation, the plunger 2 is provided with four plungers arranged in a matrix and sharing the inlet / outlet adapter 21. The corresponding inlet / outlet adapter 21 is arranged horizontally, located between the two upper plungers 2 and the two lower plungers 2, and is perpendicular to each plunger 2. The arrangement is reasonable, the structure is compact, and the utilization rate is high.

[0025] As a further improved specific implementation, a clamping cylinder 22 is provided on the outer side of the screen-changing end of the plunger 2. The clamping cylinder 22 has an axial opening and is equipped with a wrench-type locking structure 23. The wrench-type locking structure 23 includes a wrench, a retaining ring, and a retaining head, which are existing mechanisms and will not be described in detail here. The clamping cylinder 22 is suspended on the bracket 25 by a telescopic rope 24. The clamping cylinder 22 is used to clamp the filter position of the plunger 2 after the screen changing is completed, and the plunger 2 can be axially moved in the clamping cylinder 22 to assist the plunger 2 in entering the plunger cavity, so as to avoid the filter assembly not being properly assembled and thus wear on the screen changer body 1. After the filter position of the plunger 2 enters the plunger cavity, the clamping cylinder 22 is opened to disengage from the plunger 2, so as to prevent the clamping cylinder 22 from blocking the exhaust hole of the filter cavity 4.

[0026] As a further improvement, the filter chamber 4 is equipped with a material pressure sensing device to sense the material pressure in the filter chamber 4, so as to determine the blockage of the filter screen 15 by the slag and decide whether backwashing is required. The backwashing time is set manually, and the cleanliness of the discharged material is used to determine whether the filter screen 15 has been cleaned.

[0027] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-functional screen changer, comprising a screen changer body and a plunger, wherein the screen changer body is provided with a plunger cavity, the plunger is matched and disposed within the plunger cavity, and the driving end of the plunger is connected to a hydraulic cylinder, and the screen changing end of the plunger can move axially out of the plunger cavity, characterized in that: The screen-changing end of the plunger is provided with a filter chamber, and the filter chamber is provided with a first filter assembly and a second filter assembly that are radially spaced apart. The outer sides of the two filter assemblies respectively form a first pre-filter channel and a second pre-filter channel, and the inner sides of the two filter assemblies together form a post-filter channel. The screen changer body and the plunger are provided with a first liquid inlet channel and a second liquid inlet channel that respectively connect the first pre-filter channel and the second pre-filter channel. The screen changer body and the plunger are provided with a liquid outlet channel that connects the post-filter channel. The screen changer body is provided with a first liquid guide hole, a second liquid guide hole and a third liquid guide hole, and the plunger is provided with a fourth liquid guide hole. One end of the fourth liquid guide hole is connected to the second pre-filter channel. One end of the first liquid guide hole, the second liquid guide hole and the third liquid guide hole are all connected to the flange cover provided on one side of the screen changer body and communicate with each other. The other end of the third liquid guide hole is located on the liquid inlet end face of the screen changer. When the two sets of filter components work at the same time, the other end of the first liquid guide hole is connected to the first pre-filter channel. The corresponding first liquid guide hole and the third liquid guide hole constitute the first liquid inlet channel. The other end of the second liquid guide hole is connected to the other end of the fourth liquid guide hole, and then connected to the second pre-filter channel. The corresponding second liquid guide hole, the fourth liquid guide hole and the third liquid guide hole constitute the second liquid inlet channel. Both the first and second filter components include a filter screen, a support mesh disposed on the inner and outer sides of the filter screen, and a porous pressure plate. The porous pressure plate is provided with a waste discharge guide groove, and the corresponding screen changer body is provided with a waste discharge hole. When the first filter component is backwashed, the other end of the corresponding first liquid guide hole connects to the other end of the fourth liquid guide hole, and then connects to the second pre-filter channel. At this time, the other end of the second liquid guide hole is closed, and the waste discharge guide groove of the porous pressure plate of the first filter component connects to the corresponding waste discharge hole. When the second filter component is backwashed, the other end of the corresponding second liquid guide hole connects to the first pre-filter channel. The other end of the first liquid guide hole is closed or both are connected to the first pre-filter channel. The waste discharge guide groove of the porous pressure plate of the second filter component connects to the waste discharge hole.

2. The multi-functional screen changer as described in claim 1, characterized in that: The waste discharge guide channel is located on the bottom surface of the porous pressure plate that is biased towards the outside, and extends to the adjacent outer surface of the porous pressure plate.

3. The multi-functional screen changer as described in claim 1, characterized in that: The screen changer body is equipped with an inlet / outlet adapter, which has a first flow channel and a second flow channel that are staggered with each other. The inlet of the first flow channel is located at one end of the inlet / outlet adapter and the first flow channel is connected to the inlet channel. The outlet of the second flow channel is located at the other end of the inlet / outlet adapter and the second flow channel is connected to the outlet channel.

4. The multi-functional screen changer as described in claim 3, characterized in that: The plunger has four plungers arranged in a matrix and shares the same inlet / outlet adapter. The corresponding inlet / outlet adapter is arranged horizontally between the two upper plungers and the two lower plungers and is perpendicular to each plunger.

5. The multi-functional screen changer as described in claim 1, characterized in that: The plunger screen changing end is equipped with a clamping cylinder on its outer side. The clamping cylinder has an axial opening and is equipped with a wrench-type locking structure. The clamping cylinder is suspended on the bracket by a telescopic rope.

6. The multi-functional screen changer as described in claim 1, characterized in that: The filter chamber is equipped with a material pressure sensing device.

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