CN219615975U - Feeding device with pressure fluctuation adjusting structure - Google Patents

Abstract

The utility model discloses a feeding device with a pressure fluctuation adjusting structure, which comprises: a coating die adapted to be connected to the end of the material conduit; a pressure fluctuation adjusting structure located upstream of the coating die head for adjusting pressure fluctuation in the material pipe, comprising: one end of the three-way pipe fitting is an adjusting end, and the other two ends of the three-way pipe fitting are communicated with a material pipeline; the movable part is arranged at the adjusting end and seals the adjusting end, and can move relative to the adjusting end; wherein the movable part moves outwards of the adjusting end to stabilize the pressure rising in the material pipeline; the movable member moves into the adjustment end to compensate for reduced pressure in the material conduit. By the arrangement, the pressure rising in the material pipeline can be stabilized, or the pressure reducing in the material pipeline can be compensated, so that the fluctuation range of the slurry pressure entering the coating die head is reduced, and the head and the tail of the coating meet the quality requirements.

Description

Feeding device with pressure fluctuation adjusting structure

Technical Field

The utility model relates to the technical field of feeding devices, in particular to a feeding device with a pressure fluctuation adjusting structure.

Background

In a batch-coated feed device, the batch valve needs to be opened and closed frequently. Specifically, the intermittent valve is opened, the material can be fed into the coating die head through the material pipeline, the intermittent valve is closed, the material pipeline can be closed, and the feeding into the coating die head is stopped. However, at the moment of opening the intermittent valve, the pressure in the material pipeline can rise suddenly, so that the size of the head part of intermittent coating is larger than expected, and at the moment of closing the intermittent valve, the pressure in the material pipeline can drop suddenly, so that the size of the tail part of intermittent coating is smaller than expected, and the performance of a finished product is influenced by the head part and the tail part of intermittent coating.

In view of the above-mentioned drawbacks, it is necessary to design a feeding device with a pressure fluctuation adjusting structure.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is that the opening and closing of the intermittent valve causes pressure fluctuation in the material pipeline and leads to the coating head and tail sizes to exceed the expected sizes, so that the feeding device with the pressure fluctuation adjusting structure is provided.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a feed device having a pressure surge structure, comprising:

a coating die adapted to be connected to the end of the material conduit;

a pressure surge structure located upstream of the coating die, comprising:

one end of the three-way pipe fitting is an adjusting end, and the other two ends of the three-way pipe fitting are communicated with the material pipeline;

the movable part is arranged at the adjusting end and seals the adjusting end, and the movable part can move relative to the adjusting end; wherein, the liquid crystal display device comprises a liquid crystal display device,

the movable part moves outwards of the adjusting end so as to stabilize the pressure rising in the material pipeline; the movable member moves into the adjustment end to compensate for reduced pressure in the material conduit.

Further, the pressure fluctuation adjusting structure further comprises a shell and a power mechanism fixedly connected with the shell, one end of the movable part is positioned in the shell and is connected with the output end of the power mechanism, the other end of the movable part enters the adjusting end and seals the adjusting end, and the power mechanism is suitable for driving the movable part to move towards the outside of the adjusting end or towards the inside of the adjusting end.

Further, the movable part is a piston.

Further, the movable member is an elastic membrane.

Further, the power mechanism is connected to the side of the elastic membrane, which is away from the adjusting end.

Further, the device also comprises an intermittent valve and a driving mechanism connected with the intermittent valve, wherein the intermittent valve is connected to the material pipeline and is positioned at the upstream of the pressure fluctuation adjusting structure, the driving mechanism is suitable for driving the intermittent valve to open and close, the pressure fluctuation is caused to change in a clearance way by the intermittent opening and closing of the intermittent valve, and the pressure fluctuation has peaks and valleys.

Further, the device also comprises a delivery pump and a motor, wherein the output end of the motor is connected with the delivery pump, the delivery pump is connected to the material pipeline and is positioned at the upstream of the pressure fluctuation adjusting structure, the pressure fluctuation is caused to be changed in a sinusoidal periodic manner by the operation of the delivery pump, and the pressure fluctuation has peaks and valleys.

Further, the power mechanism operates t milliseconds before or after the peak value or the valley value occurs, and t is less than or equal to 1000.

Further, an inlet pressure sensor is arranged at the downstream of the inlet of the three-way pipe fitting, the inlet pressure sensor is electrically connected with a control mechanism, the inlet pressure sensor is suitable for detecting the pressure of the inlet of the three-way pipe fitting and sending an inlet pressure signal to the control mechanism, the control mechanism is electrically connected with the power mechanism, and the control mechanism controls the power mechanism to drive the movable part to move towards the outside of the adjusting end or towards the inside of the adjusting end according to the inlet pressure signal.

Further, an outlet pressure sensor is arranged at the outlet of the three-way pipe fitting, and the outlet pressure sensor is suitable for detecting the pressure at the outlet of the three-way pipe fitting and sending an outlet pressure signal to the control mechanism.

The technical scheme of the utility model has the following advantages:

the feeding device with the pressure fluctuation adjusting structure is arranged on the material pipeline and is positioned at the upstream of the coating die head, one end of the three-way pipe fitting of the pressure fluctuation adjusting structure is an adjusting end, the two ends of the three-way pipe fitting are communicated with the material pipeline, the movable part of the pressure fluctuation adjusting structure is arranged at the adjusting end and seals the adjusting end, the movable part can move relative to the adjusting end, the movable part moves outwards of the adjusting end and can stabilize the pressure rising in the material pipeline, the movable part moves inwards of the adjusting end and can compensate the pressure lowering in the material pipeline, so that the pressure fluctuation range in the material pipeline can be adjusted to a proper range, the pressure fluctuation reaching the coating die head can not exceed the expected value, and finally the head or tail of the coating can not exceed the expected value, thereby ensuring the coating quality.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a feed device with a pressure fluctuation adjusting structure of the present utility model;

FIG. 2 is a schematic diagram showing a combination of the pressure fluctuation adjusting structure according to the present utility model;

FIG. 3 is an exploded schematic view of the pressure fluctuation adjusting structure of the present utility model;

FIG. 4 is a graph showing a comparison of pressure waveforms before and after adjustment of pressure fluctuation caused by an intermittent valve in the present utility model;

FIG. 5 is a graph comparing the waveforms of the pressures before and after the adjustment of the pressure fluctuation caused by the transfer pump in the present utility model.

Reference numerals illustrate:

3. a pressure fluctuation adjusting structure; 31. a housing; 32. a three-way pipe fitting; 33. a movable member; 34. a power mechanism; 4. and (5) coating a die head.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 to 5, the present embodiment provides a feeding device with a pressure fluctuation adjusting structure, which includes a transfer pump (not shown), a material pipe, an intermittent valve, a driving mechanism, a control mechanism, and a pressure fluctuation adjusting structure 3. The material conduit is adapted to provide a flow path for the coating slurry.

In this embodiment, the delivery pump is a screw pump, and the delivery pump is connected with a motor, and the motor drives the screw pump to operate.

The intermittent valve is arranged on the material pipeline and is positioned at the upstream of the coating die head 4 so as to control the opening and closing of the material pipeline. The intermittent valve is connected with a driving mechanism, and the driving mechanism is used for driving the intermittent valve to open and close. The intermittent valve is opened, slurry enters the material pipe through the intermittent valve, and at the opening moment, the pressure in the material pipe rises suddenly, the intermittent valve is closed, the slurry cannot enter the material pipe through the intermittent valve, and at the closing moment, the pressure in the material pipe drops suddenly.

The pressure fluctuation adjusting structure 3 is arranged on the material pipeline and is positioned at the downstream of the intermittent valve and is used for adjusting the pressure fluctuation caused by the intermittent valve, so that the pressure fluctuation in the material pipeline at the downstream of the pressure fluctuation adjusting structure 3 is in a proper range. In the present embodiment, the pressure fluctuation adjusting structure 3 includes a housing 31, a three-way pipe fitting 32, a movable member 33, and a power mechanism 34.

The tee fitting 32 is of a hollow T-shape, although other shapes such as Y-shapes are possible, however,

three access ports are provided. One end of the three-way pipe fitting 32 is an adjusting end, the adjusting end is connected with the movable part 33, and the other two ends (wherein, in the flow direction of slurry, one end which is closer to the intermittent valve is an inlet, and the other end which is farther from the intermittent valve is an outlet) are communicated with a material pipeline, and slurry enters from the inlet and flows out from the outlet.

The movable part 33 is mounted at the adjusting end and seals the adjusting end, so that the material in the material pipe can not leak to the outside of the three-way pipe fitting 32 via the adjusting end, and the air outside can not enter the material pipe via the adjusting end of the three-way pipe fitting 32, and in addition, the movable part 33 can move relative to the adjusting end. In this embodiment, the movable member 33 is a piston, one end of which is located in the housing 31 and connected to the output end of the power mechanism 34, and the other end of which enters the adjustment end and seals the adjustment end.

The power mechanism 34 is controlled by the control mechanism to be suitable for driving the piston to move towards the outside of the adjusting end or towards the inside of the adjusting end, and the stroke of the piston can be adjusted by adjusting the stroke of the power mechanism 34, so that the size of the pressure fluctuation which can be adjusted by the pressure fluctuation adjusting structure 3 can be adjusted. Specifically, as shown by the dark line in fig. 4, at the moment when the intermittent valve is opened, the pressure in the material pipeline suddenly rises, the pressure in the material pipeline reaches a peak value, the power mechanism 34 drives the piston to move towards the outside of the adjusting end, the volume in the three-way pipe fitting 32 becomes larger, the pressure becomes smaller, the rising pressure in the material pipeline is stabilized, the peak value of the pressure fluctuation in the material pipeline becomes smaller, and of course, the stabilization can be to partially absorb the rising pressure, so that the rising amplitude of the pressure cannot exceed the expectation; as shown by the dark line in fig. 4, at the moment when the intermittent valve is closed, the pressure in the material pipe suddenly drops, the pressure in the material pipe reaches the valley value, the power mechanism 34 drives the piston to move towards the adjusting end, the volume in the three-way pipe 32 becomes smaller, the pressure becomes larger, the reduced pressure in the material pipe is compensated, the valley value of the pressure fluctuation of the material pipe becomes smaller, and of course, the compensation can be partial compensation, so that the amplitude of the pressure reduction cannot exceed the expectation. Because the intermittent valve is opened and closed intermittently, the pressure fluctuation caused by the intermittent valve is changed intermittently correspondingly. As shown by the light-colored lines in fig. 4, in order to show the pressure wave diagram in the material pipeline after adjustment, it can be seen from the diagram that the pressure fluctuation amplitude in the material pipeline caused by the opening and closing of the intermittent valve is obviously reduced by the adjustment of the pressure fluctuation adjusting structure 3, so that the pressure fluctuation in the material pipeline caused by the intermittent valve can be adjusted to a proper range, and the coating quality is ensured. That is, as an embodiment, in the foregoing pressure fluctuation adjusting process, the operation time of the power mechanism 34 is associated with the time when the peak value and the valley value occur, but since the peak value occurs at the intermittent valve opening instant and the valley value occurs at the intermittent valve closing instant, in practice, the time difference between the opening of the intermittent valve and the occurrence of the peak value is negligible, and the time difference between the closing of the intermittent valve and the occurrence of the valley value is also negligible, then the power mechanism 34 and the driving mechanism of the intermittent valve can be considered to cooperate, specifically, the driving mechanism and the power mechanism 34 are both an electric mechanism (for example, a screw motor, a linear motor, a piezoelectric motor) or a pneumatic mechanism (for example, a cylinder), and the power mechanism 34 can be operated again in advance or later by t milliseconds with respect to the driving mechanism, and the timing of adjusting the pressure fluctuation can be selected by setting of the t value, preferably, t is less than or equal to 1000.t is set in advance according to actual needs. Of course, the power mechanism 34 and the drive mechanism may also be operated simultaneously.

As another embodiment, the difference between the actuation time of the power mechanism 34 and the actuation time of the drive mechanism is not set directly. The operation of the power mechanism 34 is controlled by a control mechanism in accordance with a pressure signal detected by a pressure sensor provided downstream of the intermittent valve. Specifically, an inlet pressure sensor is disposed at the inlet of the three-way pipe fitting 32, the inlet pressure sensor is electrically connected with a control mechanism, the control mechanism is electrically connected with a power mechanism 34, the inlet pressure sensor detects the pressure at the inlet of the three-way pipe fitting 32 and sends an inlet pressure signal to the control mechanism, when the pressure at the inlet rises to reach a preset value, the control mechanism controls the power mechanism 34 to drive the piston to move outwards towards the adjusting end according to the inlet pressure signal so as to stabilize the rising pressure, and when the pressure at the inlet falls to reach the preset value, the control mechanism controls the power mechanism 34 to drive the piston to move inwards towards the adjusting end according to the inlet pressure signal so as to compensate the reduced pressure. In addition, an outlet pressure sensor is also disposed at the outlet of the three-way pipe fitting 32, and the outlet pressure sensor is adapted to detect the pressure at the outlet of the three-way pipe fitting 32 and send an outlet pressure signal to a control mechanism, where the control mechanism is used to determine whether the regulated pressure meets the requirement.

Of course, the pressure fluctuation of the material pipeline may also be caused by the periodic operation of the motor-driven conveying pump, and since the operation of the conveying pump is periodic, the pressure fluctuation caused by the conveying pump also changes periodically and takes the form of a sine wave, as shown in fig. 5, the horizontal axis is time t, the vertical axis is pressure value p, and the unit is Kpa. The dashed line in fig. 5 is a pressure waveform before the pressure in the material conduit is unregulated, from which it can be seen that at times T/4, 5T/4, 9T/4, 13T/4, (4n+1) T/4, peaks appear, at times of 3T/4, 7T/4, 11T/4, 15T/4, (4n+3) T/4, where t=1/f, T is the run period of the motor and f is the frequency of the motor. As an embodiment, the actuation time of the power mechanism 34 of the pressure fluctuation adjusting structure 3 cooperates with the occurrence time of the peak or trough, in particular, T milliseconds before or after the occurrence of the peak, i.e. T milliseconds before or after the motor operation time is (4n+1) T/4, the power mechanism 34 of the pressure fluctuation adjusting structure 3 drives the movable member 33 to move towards the outside of the adjusting end to stabilize the pressure rising in the material pipe; before or after the occurrence of the valley, i.e. before or after the motor run time (4n+3) T/4, the power mechanism 34 of the pressure fluctuation adjusting structure 3 drives the movable part 33 into the adjusting end to compensate for the reduced pressure in the material pipe. In this embodiment, t.ltoreq.1000. The solid line in fig. 5 is a pressure waveform diagram after the pressure adjustment. As can be seen from fig. 5, after the adjustment by the pressure fluctuation adjusting structure 3, the pressure fluctuation range in the material pipe is significantly reduced, so that the pressure fluctuation caused by the transfer pump in the material pipe can be adjusted to a proper range, so as to ensure the coating quality.

In regulating the pressure fluctuations in the material conduit caused by the transfer pump, the action of the power mechanism 34 may also be controlled in dependence of a pressure signal detected by a pressure sensor arranged downstream of the transfer pump. Specifically, an inlet pressure sensor is disposed at the inlet of the three-way pipe fitting 32, the inlet pressure sensor is electrically connected with a control mechanism, the control mechanism is electrically connected with a power mechanism 34, the inlet pressure sensor detects the pressure at the inlet of the three-way pipe fitting 32 and sends an inlet pressure signal to the control mechanism, when the pressure at the inlet rises to reach a preset value, the control mechanism controls the power mechanism 34 to drive the piston to move outwards towards the adjusting end according to the inlet pressure signal so as to stabilize the rising pressure, and when the pressure at the inlet falls to reach the preset value, the control mechanism controls the power mechanism 34 to drive the piston to move inwards towards the adjusting end according to the inlet pressure signal so as to compensate the reduced pressure. In addition, an outlet pressure sensor is also disposed at the outlet of the three-way pipe fitting 32, and the outlet pressure sensor is adapted to detect the pressure at the outlet of the three-way pipe fitting 32 and send an outlet pressure signal to a control mechanism, where the control mechanism is used to determine whether the regulated pressure meets the requirement.

In this embodiment, the movable member 33 may also be an elastic membrane, in which case the elastic membrane is still driven by the power mechanism 34, and the power mechanism 34 is connected to the side of the elastic membrane facing away from the adjustment end. At the moment of opening the intermittent valve, the material enters the material pipeline, so that the pressure in the material pipeline rises suddenly, the power mechanism 34 drives the elastic membrane to move outwards of the adjusting end, the volume in the three-way pipe fitting 32 becomes larger, the pressure becomes smaller, and the rising pressure in the material pipeline is stabilized; at the closing moment of the intermittent valve, the material does not enter the material pipeline any more, so that when the pressure in the material pipeline suddenly drops, the power mechanism 34 drives the elastic membrane to move towards the adjusting end, the volume in the three-way pipe fitting 32 is reduced, the pressure is increased, the reduced pressure in the material pipeline is compensated, and the adjusting effect of the pressure fluctuation amplitude in the material pipeline is further realized. When the pressure fluctuation is caused by the delivery pump, the pressure fluctuation is regulated in the same manner as the pressure fluctuation caused by the opening and closing of the intermittent valve.

In summary, in the feeding device with the pressure fluctuation adjusting structure of the present embodiment, both the pressure fluctuation in the material pipe caused by the intermittent valve and the pressure fluctuation in the material pipe caused by the delivery pump can be stabilized by moving the movable part 33 of the pressure fluctuation adjusting structure 3 out of the adjusting end, and accordingly, the reduced pressure in the material pipe is compensated by moving the movable part 33 of the pressure fluctuation adjusting structure 3 into the adjusting end, so that the pressure fluctuation range in the material pipe can be adjusted to a proper range, the pressure entering the coating die 4 can be kept in a proper range, the head or tail of the coating die 4 can not exceed the expected value, and the coating quality can be finally ensured.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. A feeding device having a pressure fluctuation adjusting structure, comprising:

a coating die (4) adapted to be connected to the end of the material conduit;

a pressure fluctuation adjusting structure (3) connected to the material pipe and located upstream of the coating die head (4), comprising:

one end of the three-way pipe fitting (32) is an adjusting end, and the other two ends of the three-way pipe fitting are communicated with the material pipeline;

a movable member (33) mounted to and sealing the adjustment end, the movable member (33) being movable relative to the adjustment end; wherein, the liquid crystal display device comprises a liquid crystal display device,

-said movable part (33) moving outwards of said adjustment end to smooth out the elevated pressure in said material conduit; the movable member (33) moves into the adjustment end to compensate for reduced pressure in the material conduit.

2. Feeding device with a pressure fluctuation adjusting structure according to claim 1, characterized in that the pressure fluctuation adjusting structure (3) further comprises a housing (31) and a power mechanism (34) fixedly connected to the housing (31), wherein one end of the movable part (33) is positioned in the housing (31) and connected to the output end of the power mechanism (34), the other end enters the adjusting end and seals the adjusting end, and the power mechanism (34) is adapted to drive the movable part (33) to move towards the outside of the adjusting end or towards the inside of the adjusting end.

3. A feeding device with a pressure fluctuation adjusting structure according to claim 2, characterized in that the movable part (33) is a piston.

4. Feeding device with a pressure fluctuation adjusting structure according to claim 2, characterized in that the movable part (33) is an elastic membrane.

5. Feeding device with a pressure fluctuation adjusting structure according to claim 4, characterized in that the power mechanism (34) is connected to the side of the elastic membrane facing away from the adjusting end.

6. A feeding device with a pressure fluctuation adjusting structure according to claim 2, further comprising an intermittent valve, a driving mechanism connected to the intermittent valve, the intermittent valve being connected to the material pipe and located upstream of the pressure fluctuation adjusting structure (3), the driving mechanism being adapted to drive the intermittent valve to open and close, the pressure fluctuation being caused by the intermittent opening and closing of the intermittent valve to vary in a intermittent manner, the pressure fluctuation having peaks and valleys.

7. A feeding device with a pressure fluctuation adjusting structure according to claim 2, characterized by further comprising a feed pump, a motor with an output connected to the feed pump, the feed pump being connected to the material conduit upstream of the pressure fluctuation adjusting structure (3), the pressure fluctuation being caused by the operation of the feed pump to vary sinusoidally periodically, the pressure fluctuation having peaks and valleys.

8. Feeding device with a pressure fluctuation adjusting structure according to claim 6 or 7, characterized in that the power mechanism (34) is operated t milliseconds before or after the occurrence of the peak value or the valley value, t being equal to or smaller than 1000.

9. The feeding device with the pressure fluctuation adjusting structure according to claim 2, wherein an inlet pressure sensor is arranged at the inlet of the tee pipe fitting (32), the inlet pressure sensor is electrically connected with a control mechanism, the inlet pressure sensor is suitable for detecting the pressure at the inlet of the tee pipe fitting (32) and sending an inlet pressure signal to the control mechanism, the control mechanism is electrically connected with the power mechanism (34), and the control mechanism controls the power mechanism (34) to drive the movable part (33) to move outwards or inwards of the adjusting end according to the inlet pressure signal.

10. Feeding device with a pressure fluctuation adjusting structure according to claim 9, characterized in that the outlet of the three-way pipe (32) is provided with an outlet pressure sensor adapted to detect the pressure at the outlet of the three-way pipe (32) and to send an outlet pressure signal to the control mechanism.