CN221976694U - Device for detecting vacuum water filtering capacity of paper pulp - Google Patents

Abstract

The utility model discloses a device for detecting the vacuum water filtering ability of pulp, comprising a vacuum tank, a sleeve, a filter, a disc, a lifting mechanism, a pressure gauge, a vacuum pump and an exhaust valve, wherein the pressure gauge is used to detect the air pressure in the vacuum tank, a through hole is provided on the top of the vacuum tank, the disc is arranged in the vacuum tank, the lifting mechanism is used to drive the disc to lift and lower to open and close the through hole, an annular groove is provided on the side of the through hole, the sleeve is sealed and clamped with the annular groove, and the filter is provided at the bottom of the through hole. The utility model aims to provide a device for detecting the vacuum water filtering ability of pulp, so as to improve the accuracy of pulp water filtering detection.

Description

A device for detecting the vacuum water filtering ability of pulp

Technical Field

The utility model relates to the technical field of pulp detection, in particular to a device for detecting the vacuum water filtering ability of pulp.

Background Art

The water filtration performance will directly affect the speed of water filtration of the pulp in the paper machine mesh, and is also one of the important parameters related to the paper machine design and its process control. The existing technology mainly detects gravity water filtration under non-vacuum suction conditions. Although there are also methods for measuring water filtration under vacuum conditions, such as the utility model patent with publication number CN203519607U: "A laboratory device for measuring water filtration of pulp", it uses a Buchner funnel plus a bottom ball valve to control it. There is a certain space between the ball valve that controls the water filtration and the raw material barrel. Before the ball valve is opened, part of the pulp will be filtered down from the raw material barrel, forming a fiber layer on the filter screen, affecting the accuracy of the results; at the same time, if the pulp filtration is faster and exceeds the narrow drainage area at the bottom of the Buchner funnel, it will also cause the problem of water filtration speed distortion.

Utility Model Content

In view of the above-mentioned prior art, the utility model provides a device for detecting the vacuum water filtering ability of pulp, so as to improve the accuracy of the detection of the water filtering ability of pulp.

To achieve the above purpose, the technical solution of the embodiment of the utility model is implemented as follows:

A device for detecting the vacuum water filtering capacity of pulp comprises a vacuum tank, a sleeve, a filter screen, a disc, a lifting mechanism, a pressure gauge, a vacuum pump and an exhaust valve, wherein the pressure gauge is used to detect the air pressure in the vacuum tank, a through hole is provided on the top of the vacuum tank, the disc is arranged in the vacuum tank, the lifting mechanism is used to drive the disc to rise and fall to open and close the through hole, an annular groove is provided on the side of the through hole, the sleeve is sealed and clamped with the annular groove, and the filter screen is provided at the bottom of the through hole.

Furthermore, a first sealing strip is provided on the side wall and/or bottom of the annular groove.

Furthermore, an L-shaped hook is provided on the top surface of the vacuum tube, and a locking protrusion is provided on the sleeve, and the locking protrusion can be rotatably locked under the L-shaped hook.

Furthermore, the lifting mechanism is a telescopic cylinder, one end of which is fixed to the bottom of the vacuum tank, and the other end of which penetrates into the vacuum tank and is connected to the disc.

Furthermore, the disc is a rubber disc, and the diameter of the rubber disc is greater than the diameter of the through hole.

Furthermore, the vacuum pump is connected to the vacuum tank via a three-way pipe, a control valve is provided between the vacuum pump and the three-way pipe, and the exhaust valve is provided at one end of the three-way pipe connected to the atmosphere.

Furthermore, the bottom of the vacuum tank is connected to a discharge valve.

Furthermore, an opening is provided on the side of the vacuum tank, a movable cover is provided on the opening, and buckles for clamping the movable cover are provided above and below the opening.

Furthermore, a second sealing strip is provided on a side of the movable cover plate facing the vacuum tank.

The beneficial effects of the utility model are: the pressure value in the vacuum tank is observed by a pressure gauge, and the outside atmosphere is slowly allowed to enter the vacuum tank by opening the exhaust valve, ensuring that the pressure value in the vacuum tank is at a preset pressure value, and the exhaust valve is closed after the pressure is adjusted. The utility model does not filter the pulp raw material downward before the through hole is opened, and the detection result is accurate. After the through hole is opened, the filtered water directly falls into the vacuum tank, solving the problem of water filtering speed distortion and improving the accuracy of pulp filterability detection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a device for detecting the vacuum water filtering ability of pulp in an embodiment of the present application;

FIG2 is a schematic cross-sectional view of a device for detecting the vacuum water filtering ability of pulp in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of the filter screen in an embodiment of the present application;

Description of Figure Numbers:

1 vacuum tank, 2 sleeve, 3 filter screen, 4 disc, 5 lifting mechanism, 6 pressure gauge, 7 vacuum pump, 8 exhaust valve, 9 through hole, 10 first sealing strip, 11 L-shaped hook, 12 convex, 13 three-way pipe, 14 discharge valve, 15 opening, 16 movable cover plate, 17 buckle, 18 second sealing strip, 19 control valve.

DETAILED DESCRIPTION

The technical solution of the utility model is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the utility model. The terms used herein in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Example 1

Referring to Figures 1 to 3, the present application provides a device for detecting the vacuum water filtering ability of pulp, comprising a vacuum tank 1, a sleeve 2, a filter screen 3, a disc 4, a lifting mechanism 5, a pressure gauge 6, a vacuum pump 7 and an exhaust valve 8, wherein the pressure gauge 6 is used to detect the air pressure in the vacuum tank 1, so as to facilitate observation and judgment of the pressure in the vacuum tank 1, a through hole 9 is provided on the top of the vacuum tank 1, and the through hole 9 connects the inside of the vacuum tank 1 and the outside atmosphere, the disc 4 is provided in the vacuum tank 1, and the lifting mechanism 5 is used to drive the disc 4 to rise and fall to open and close the through hole 9, and the disc 4 moves upward to close the through hole 9. The through hole 9 is sealed, and the through hole 9 is opened when the disc 4 moves downward. The side of the through hole 9 is provided with an annular groove, which makes the edge of the through hole 9 L-shaped. The sleeve 2 is sealed and connected with the annular groove. The sleeve 2 is inserted into the through hole 9, and the lower edge of the sleeve 2 is tightly stuck in the annular groove, so that the lower end of the sleeve 2 is sealed with the top of the vacuum tank 1. The bottom of the through hole 9 is provided with the filter 3, which can be fixedly connected with the bottom of the sleeve 2, or the filter 3 is placed on the annular groove. When the disc 4 covers the through hole 9 upward, the top of the disc 4 contacts the filter 3. When testing, the lifting mechanism 5 drives the disc 4 to move upward to cover the through hole 9, and then the vacuum pump 7 is turned on to draw the vacuum tank 1 into negative pressure, and the pressure value in the vacuum tank 1 is observed through the pressure gauge 6, and the outside atmosphere is slowly allowed to enter the vacuum tank 1 by opening the exhaust valve 8 to ensure that the pressure value in the vacuum tank 1 is at the preset pressure value, and the exhaust valve 8 is closed after the pressure is adjusted. The slurry is introduced into the sleeve 2, and the lifting mechanism 5 is used to drive the disc 4 to move downward. After the through hole 9 is opened, the slurry is filtered under the action of negative pressure. The pressure gauge 6 is observed. When the water is filtered out and forms a filter cake on the filter screen, there will be a vacuum break phenomenon. At this time, the pressure gauge 6 will suddenly become atmospheric pressure. The time from the beginning to the vacuum break is recorded. The shorter the time, the better the water filtration. The utility model does not filter the pulp raw material downward before the through hole 9 is opened, and the test result is accurate. After the through hole 9 is opened, the filtered water directly falls into the vacuum tank 1, solving the problem of water filtration speed distortion.

Specifically, the side wall and/or the bottom of the annular groove is provided with a first sealing strip 10. The first sealing strip 10 is used to seal the gap between the sleeve 2 and the vacuum tank 1 to improve the sealing performance.

Specifically, the top surface of the vacuum tube is provided with an L-shaped hook 11, and the sleeve 2 is provided with a protrusion 12, and the protrusion 12 can be rotated and clamped under the L-shaped hook 11. When the bayonet is rotated to the bottom of the L-shaped hook 11, the L-shaped hook 11 tightly clamps the bayonet, so that the sleeve 2 is pressed downward.

Specifically, the lifting mechanism 5 is a telescopic cylinder, one end of which is fixed to the bottom of the vacuum tank 1, and the other end of which penetrates into the vacuum tank 1 and is connected to the disc 4. When the cylinder is working, it stretches upward or shrinks downward, thereby driving the disc 4 to move up and down to open or close the through hole 9.

Specifically, the disc 4 is a rubber disc 4, and the diameter of the rubber disc 4 is larger than the diameter of the through hole 9, so as to ensure that the disc 4 can seal the through hole 9 tightly.

Specifically, the vacuum pump 7 is connected to the vacuum tank 1 through a three-way pipe 13, a control valve 19 is provided between the vacuum pump 7 and the three-way pipe 13, and the exhaust valve 8 is provided at one end of the three-way pipe 13 connected to the atmosphere. When the control valve 19 is opened, the flow channel between the vacuum pump 7 and the vacuum tank 1 is opened, and when the control valve 19 is closed, the flow channel between the vacuum pump 7 and the vacuum tank 1 is closed. When the exhaust valve 8 is opened, the vacuum tank 1 is connected to the atmosphere, and the atmospheric pressure can enter the vacuum tank 1 through the exhaust valve 8. When the exhaust valve 8 is closed, the channel connecting the vacuum tank 1 to the atmosphere is closed.

Specifically, the bottom of the vacuum tank 1 is connected to a discharge valve 14 . After detection, the discharge valve 14 is opened, and waste liquid can be discharged from the discharge valve 14 .

Example 2

Referring to Figures 1 to 3, the difference between this embodiment and embodiment 1 is that an opening 15 is provided on the side of the vacuum tank 1, and a movable cover plate 16 is provided on the opening 15. Buckles 17 for clamping the movable cover plate 16 are provided above and below the opening 15. The movable cover plate 16 can be removed from the side of the vacuum tank 1, and the movable cover plate 16 is opened after the test is completed, so that the staff can clean the inside of the vacuum tank 1. During the test, the movable cover plate 16 covers the opening 15, and then is clamped with the buckle 17.

Specifically, a second sealing strip 18 is provided on the side of the movable cover plate 16 facing the vacuum tank 1 to improve the sealing effect of the movable cover plate 16 .

The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The protection scope of the utility model should be based on the protection scope of the claims.

Claims (9)

1. The utility model provides a detect paper pulp vacuum drainage ability's device, its characterized in that includes vacuum tank, sleeve, filter screen, disc, elevating system, manometer, vacuum pump and discharge valve, the manometer is used for detecting atmospheric pressure in the vacuum tank, the top of vacuum tank is equipped with the through-hole, the disc is located in the vacuum tank, elevating system is used for the drive the disc goes up and down in order to open and to close the through-hole, the side of through-hole is equipped with annular draw-in groove, the sleeve with the sealed joint of annular draw-in groove, the bottom of through-hole is equipped with the filter screen.

2. The device for detecting the vacuum drainage capacity of paper pulp according to claim 1, wherein the side wall and/or the bottom of the annular clamping groove is/are provided with a first sealing strip.

3. A device for detecting the vacuum drainage capacity of pulp according to claim 1 or 2, wherein the top surface of the vacuum tube is provided with an L-shaped hook, the sleeve is provided with a clamping protrusion, and the clamping protrusion can be rotationally clamped below the L-shaped hook.

4. The device for detecting the vacuum drainage capacity of paper pulp according to claim 1, wherein the lifting mechanism is a telescopic cylinder, one end of the telescopic cylinder is fixed at the bottom of the vacuum tank, and the other end of the telescopic cylinder penetrates into the vacuum tank to be connected with the disc.

5. The apparatus for detecting vacuum drainage capacity of pulp as claimed in claim 1, wherein the disc is a puck having a diameter larger than a diameter of the through hole.

6. The device for detecting the vacuum drainage capacity of paper pulp according to claim 1, wherein the vacuum pump is communicated with the vacuum tank through a three-way pipe, a control valve is arranged between the vacuum pump and the three-way pipe, and the exhaust valve is arranged at one end of the three-way pipe, which is communicated with the atmosphere.

7. The apparatus for detecting vacuum drainage capacity of pulp as claimed in claim 1, wherein a drain valve is communicated with the bottom of the vacuum tank.

8. The device for detecting the vacuum drainage capacity of paper pulp according to claim 1, wherein an opening is formed in the side face of the vacuum tank, a movable cover plate is arranged on the opening, and buckles for clamping the movable cover plate are arranged above and below the opening.

9. The apparatus for detecting vacuum drainage capacity of pulp as claimed in claim 8, wherein a second sealing strip is provided on a side of the movable cover plate facing the vacuum tank.