Closed scraper device with pressure detection function

Abstract

The invention belongs to the technical field of coating equipment, and particularly relates to a closed scraper device with a pressure detection function, which comprises an anilox roller assembly, a scraper assembly and a pressure detection assembly, the scraper assembly is arranged on the side face of the anilox roller and matched with the anilox roller to form a closed scraper cavity; the pressure sensor is arranged on the scraper assembly and used for detecting the pressure in the closed scraper cavity; the feeding assembly comprises a feeding pump communicated with the closed scraper cavity; the main control module is electrically connected with the pressure sensor and the feeding pump; according to the closed scraper device with the pressure detection function, the main control module receives pressure data uploaded by the pressure sensor and analyzes and processes the pressure data, when the pressure data exceeds a preset value, the main control module controls the conveying amount of the feeding pump so as to conduct closed-loop control over the pressure in the closed scraper cavity, coating thickness fluctuation caused by uncontrollable pressure is avoided, and the coating quality is improved. And the pressure in the closed scraper cavity is quickly responded and automatically compensated, so that the effect of remarkably improving the uniformity of a coating is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coating equipment, and particularly relates to a closed doctor device with pressure detection. BACKGROUND

[0002] In the coating process, the closed doctor system has become the core component of high-end coating equipment due to its good sealing performance and high coating utilization rate. Currently, three pressure control modes are mainly used in the field: The first mode is a fixed speed gear pump feeding + mechanical overflow valve pressure stabilizing scheme, which has simple structure and low cost, but the pressure fluctuation range is large, which can reach ±0.2MPa; The second mode is a pneumatic back pressure regulating system, which can improve the regulating accuracy to ±0.1MPa by applying constant back pressure through a cylinder, but has the problem of slow response speed; The third mode is a servo motor driven screw pump scheme, which can theoretically realize pressure regulation, but the actual control accuracy is still limited due to the lack of real-time feedback mechanism.

[0003] The above modes have the following defects: first, the pressure detection mechanism is missing, which causes abnormal conditions to be unable to be timely warned, and usually when the filter screen is blocked by 30%, it is discovered through coating defects; second, an open loop control mode is used, and the pressure fluctuation caused by the change of coating viscosity cannot be automatically compensated; finally, when the pipeline is blocked, the traditional overflow valve has a delayed response, which can cause an overpressure state for 5-8 seconds, seriously affecting the coating quality.

[0004] Therefore, in order to solve the above problems, it is necessary to design a closed doctor device with pressure detection. SUMMARY

[0005] The purpose of the present application is to provide a closed doctor device with pressure detection to solve the technical problems mentioned in the background.

[0006] In order to solve the above technical problems, the present application provides a closed doctor device with pressure detection, comprising: a screen roller assembly, comprising a screen roller; a doctor assembly arranged on the side of the screen roller and cooperating with the screen roller to form a closed doctor cavity; a pressure sensor arranged on the doctor assembly and used for detecting the pressure in the closed doctor cavity; a feeding assembly, comprising a feeding pump in communication with the closed doctor cavity; a main control module electrically connected with the pressure sensor and the feeding pump; wherein The main control module is adapted to control the delivery amount of the feeding pump according to the pressure data uploaded by the pressure sensor.

[0007] Further, the scraper assembly comprises a scraper seat arranged on one side of the anilox roller, a pressing plate arranged on the upper and lower sides of the scraper seat, and sealing baffle plates arranged on both sides of the scraper seat; wherein The side surface of the sealing baffle plate is matched with the arc surface of the anilox roller. The scraper seat, the pressing plate and the sealing baffle plates cooperatively form an open scraper cavity. The pressing plate and the sealing baffle plates form a closed scraper cavity when in contact with the anilox roller.

[0008] Further, the scraper assembly further comprises a blade arranged on the inner side of the pressing plate; wherein The blade and the sealing baffle plates form a closed scraper cavity when in contact with the anilox roller.

[0009] Further, the anilox roller assembly further comprises bearing housings sleeved on both ends of the anilox roller; wherein The bearing housings are connected with the bearings of the anilox roller. The bearing housings are adapted to be fixed on the machine base to mount the anilox roller to the working position.

[0010] Further, the feeding assembly further comprises a feeding rack, a transfer cylinder arranged on the feeding rack, and a feeding pipe connected with the outlet end of the feeding pump; wherein The feeding pump is fixed on the feeding rack, and the inlet end is in communication with the transfer cylinder. The other end of the feeding pipe is fixed in the middle of the scraper seat and is in communication with the closed scraper cavity to feed the closed scraper cavity.

[0011] Further, the feeding assembly further comprises a return pipe in communication with the transfer cylinder, two branch pipes connected with the return pipe, and a valve arranged on the return pipe; wherein The other ends of the two branch pipes are respectively fixed on both sides of the scraper seat and are respectively in communication with the closed scraper cavity.

[0012] Further, the feeding assembly further comprises a de-ironing device arranged between the feeding pipe and the feeding pump; wherein The two ends of the de-ironing device are respectively connected with the feeding pipe and the outlet end of the feeding pump.

[0013] Further, the feeding assembly further comprises a filter arranged between the de-ironing device and the feeding pipe; wherein The two ends of the filter are respectively connected with the feeding pipe and the de-ironing device.

[0014] Further, the scraper assembly further comprises a reinforcing member arranged on the scraper seat.

[0015] The present application has the following advantages: (I), the present application realizes real-time monitoring of pressure by setting pressure sensor in closed doctor blade cavity, the main control module receives pressure data uploaded by pressure sensor and carries out analysis and processing, when pressure data exceeds preset value, the main control module controls the delivery amount of feed pump, to the closed loop control of pressure in closed doctor blade cavity, avoid the fluctuation of coating thickness caused by uncontrollable pressure, to fast response and automatic compensation of pressure in closed doctor blade cavity, thereby reach the effect of significantly improving coating uniformity.

[0016] (II), the present application removes ferrous and other particulate impurities from the coating through the dual purification effect of the de-ironer and filter, reducing coating defects caused by impurities and improving the surface quality of the coating.

[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and achieved by the structure particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 is a perspective view of the preferred embodiment of the whole of the present application Figure One ; Figure 2 is a sectional view of the preferred embodiment of the doctor blade assembly of the present application Figure 3 is a perspective view of the preferred embodiment of the whole of the present application Figure Two .

[0021] In the drawings: anilox roller assembly 1, anilox roller 101, bearing seat 102 doctor blade assembly 2, closed doctor blade cavity 201, blade seat 202, pressing plate 203, sealing baffle 204, blade 205, reinforcing member 206 pressure sensor 3 Feeding assembly 4, feeding pump 401, feeding rack 402, transfer barrel 403, feeding pipe 404, return pipe 405, branch pipe 406, valve 407, iron remover 408, filter 409. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example 1

[0023] like Figures 1 to 3 As shown, this embodiment provides a closed scraper device with pressure detection, comprising: The anilox roller assembly 1 comprises: an anilox roller 101; a scraper assembly 2, which is arranged on the side of the anilox roller 101 and cooperates with the anilox roller 101 to form a closed scraper chamber 201; a pressure sensor 3, which is arranged on the scraper assembly 2 and is used to detect the pressure in the closed scraper chamber 201; a feeding assembly 4, which comprises: a feeding pump 401 connected to the closed scraper chamber 201; a main control module, which is electrically connected to the pressure sensor 3 and the feeding pump 401; wherein the main control module is suitable for controlling the delivery volume of the feeding pump 401 according to the pressure data uploaded by the pressure sensor 3; wherein the closed scraper chamber 201 is formed by cooperating with the anilox roller 101 and the scraper assembly 2, thereby preventing paint leakage and improving paint utilization; wherein the main control module adopts but is not limited to a PLC controller.

[0024] In this embodiment, real-time pressure monitoring is achieved by setting a pressure sensor 3 in the closed scraper chamber 201, and the pressure data uploaded by the pressure sensor 3 is received by the main control module and analyzed and processed. When the pressure data exceeds the preset value, the main control module controls the delivery volume of the feed pump 401 to achieve closed-loop control of the pressure in the closed scraper chamber 201, thereby avoiding fluctuations in coating thickness caused by uncontrollable pressure, and quickly responding and automatically compensating for the pressure in the closed scraper chamber 201, thereby significantly improving the uniformity of the coating.

[0025] The doctor blade assembly 2 comprises a blade holder 202 arranged on one side of the anilox roller 101, a pressing plate 203 arranged on the upper and lower sides of the blade holder 202, and sealing baffle plates 204 arranged on both sides of the blade holder 202; the side surfaces of the sealing baffle plates 204 are matched with the arc surfaces of the anilox roller 101; the blade holder 202, the pressing plate 203 and the sealing baffle plates 204 cooperatively form an open doctor blade cavity; and the pressing plate 203 and the sealing baffle plates 204 form a closed doctor blade cavity 201 when they are in contact with the anilox roller 101; the pressing plate 203 is used to remove the excess paint on the surface of the anilox roller 101 in addition to forming the open doctor blade cavity, so as to ensure the quality of the coating; the sealing baffle plates 204 are arranged to match the arc surfaces of the anilox roller 101, so as to prevent paint leakage and improve the utilization rate of paint.

[0026] The doctor blade assembly 2 further comprises a blade 205 arranged on the inner side of the pressing plate 203; the blade 205 and the sealing baffle plates 204 form the closed doctor blade cavity 201 when they are in contact with the anilox roller 101; the blade 205 is arranged to improve the accuracy of removing the excess paint on the surface of the anilox roller 101, so as to ensure the quality of the coating.

[0027] The anilox roller assembly 1 further comprises bearing housings 102 sleeved on both ends of the anilox roller 101; the bearing housings 102 are connected with the anilox roller 101 through bearings; and the bearing housings 102 are adapted to be fixed on a machine base to mount the anilox roller 101 to a working position.

[0028] The feeding assembly 4 further comprises a feeding rack 402, a transfer cylinder 403 arranged on the feeding rack 402, and a feeding pipe 404 connected with the outlet pipe of the feeding pump 401; the feeding pump 401 is fixed on the feeding rack 402, and the inlet thereof is communicated with the transfer cylinder 403; the other end of the feeding pipe 404 is fixed in the middle of the blade holder 202 and is communicated with the closed doctor blade cavity 201 to feed paint into the closed doctor blade cavity 201; the transfer cylinder 403 is used to temporarily store paint to continuously feed paint to the feeding pump 401, and the paint circulating back is received through a back feeding pipe 405 to realize the recycling of paint; the feeding pump 401 is most preferably a diaphragm pump; the main control module controls the feeding pump 401 to start, and the feeding pump 401 delivers the paint in the transfer cylinder 403 to the closed doctor blade cavity 201 through the feeding pipe 404.

[0029] The feeding assembly 4 further comprises a backflow pipe 405 in communication with the transit cylinder 403, two branch pipes 406 in pipeline connection with the backflow pipe 405, and a valve 407 arranged on the backflow pipe 405; one end of each of the two branch pipes 406 is fixed on the two sides of the knife holder 202 and is in communication with the closed doctor blade cavity 201; the excess paint in the closed doctor blade cavity 201 is backflowed to the transit cylinder 403 through the backflow pipe 405 and the branch pipes 406, so that the paint circulation is realized and the waste is reduced; the on-off and backflow amount of the backflow pipe 405 are controlled through the valve 407 arranged on the backflow pipe 405, so that the paint circulation speed is adjusted according to the actual working condition.

[0030] The feeding assembly 4 further comprises a de-ironer 408 arranged between the feeding pipe 404 and the feeding pump 401; two ends of the de-ironer 408 are in pipeline connection with the feeding pipe 404 and the discharge end of the feeding pump 401 respectively; the ferromagnetic impurities in the paint are adsorbed through the de-ironer 408, so that the impurities are prevented from entering the closed doctor blade cavity 201 to affect the coating quality or damage the blade 205.

[0031] The feeding assembly 4 further comprises a filter 409 arranged between the de-ironer 408 and the feeding pipe 404; two ends of the filter 409 are in pipeline connection with the feeding pipe 404 and the de-ironer 408 respectively; the non-ferromagnetic impurities and particles in the paint are filtered through the filter 409, so that the paint purity is improved and the coating effect is ensured.

[0032] In the embodiment, the ferromagnetic impurities and other particle impurities in the paint are effectively removed through the double purification effects of the de-ironer 408 and the filter 409, the coating defects caused by the impurities are reduced, and the surface quality of the coating is improved.

[0033] The doctor blade assembly 2 further comprises a reinforcing member 206 arranged on the knife holder 202; the structural strength of the knife holder 202 is enhanced through the reinforcing member 206, so that the deformation of the knife holder 202 is avoided when the knife holder 202 works for a long time or the pressure changes, and the stability of the overall structure is ensured.

[0034] In the embodiment, the main control module controls the feed pump 401 to draw the paint in the transfer cylinder 403, the paint passes through the iron remover 408 to remove ferromagnetic impurities and the filter 409 to filter other impurities, and then is transported to the middle of the knife seat 202 through the feed pipe 404 and enters the closed doctor cavity 201 formed by the cooperation of the anilox roller assembly 1 and the doctor blade assembly 2. After the paint enters the closed doctor cavity 201, the pressure sensor 3 installed on the doctor blade assembly 2 detects the pressure in the cavity in real time and continuously transmits the pressure data to the main control module. The main control module compares and analyzes the detected pressure value with the preset value. When the detected pressure value deviates from the set pressure, the main control module immediately controls the feed pump 401 to adjust the delivery amount. If the detected pressure is higher than the set value, the feed pump 401 reduces the paint delivery amount to make the cavity pressure drop to the set value. If the detected pressure is lower than the set value, the feed pump 401 increases the paint delivery amount to make the cavity pressure rise to the set value. The excess paint in the closed doctor cavity 201 enters the return pipe 405 through the branch pipes 406 on both sides of the knife seat 202 and returns to the transfer cylinder 403 under the control of the valve 407, realizing the recycling of the paint and completing the high-precision coating operation together.

[0035] The various devices (parts without specific structure) selected in the present application are all general standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0036] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. The embodiments described above are merely exemplary, for example, the division of the units is only a logical function division, and there can be another division manner in actual implementation; for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or the among different units, can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0039] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0040] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in one unit.

[0041] With the above-described ideal embodiments according to the present application as the inspiration, through the above-described description, relevant personnel can certainly make various changes and modifications without deviating from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A closed scraper device with pressure detection, characterized in that: include: An anilox roller assembly (1), comprising: an anilox roller (101); A scraper assembly (2) is arranged on the side of the anilox roller (101) and cooperates with the anilox roller (101) to form a closed scraper chamber (201); A pressure sensor (3) is provided on the scraper assembly (2) and is used to detect the pressure in the closed scraper chamber (201); A feeding assembly (4) comprising: a feeding pump (401) in communication with the closed scraper chamber (201); The main control module is electrically connected to the pressure sensor (3) and the feed pump (401); wherein The main control module is suitable for controlling the delivery volume of the feed pump (401) according to the pressure data uploaded by the pressure sensor (3).

2. The closed scraper device with pressure detection according to claim 1, characterized in that: The scraper assembly (2) comprises: a blade seat (202) arranged on one side of the anilox roller (101), pressure plates (203) arranged on the upper and lower sides of the blade seat (202), and sealing baffles (204) arranged on both sides of the blade seat (202); wherein The side surface of the sealing baffle (204) is adapted to the arc surface of the anilox roller (101); The blade seat (202), the pressure plate (203) and the sealing baffle (204) cooperate to form an open scraper cavity; and When the pressure plate (203) and the sealing baffle (204) are in contact with the anilox roller (101), a closed scraper chamber (201) is formed.

3. The closed scraper device with pressure detection according to claim 2, characterized in that: The scraper assembly (2) further comprises: a blade (205) arranged on the inner side of the pressure plate (203); wherein When the blade (205) and the sealing baffle (204) are in contact with the anilox roller (101), a closed scraper chamber (201) is formed.

4. The closed scraper device with pressure detection according to claim 3, characterized in that: The anilox roller assembly (1) further comprises: bearing seats (102) sleeved on both ends of the anilox roller (101); wherein The bearing seat (102) is connected to the anilox roller (101) bearing; and The bearing seat (102) is suitable for being fixed on the machine base so as to install the anilox roller (101) to a working position.

5. The closed scraper device with pressure detection according to claim 4, characterized in that: The feeding assembly (4) further comprises: a feeding rack (402), a transfer barrel (403) arranged on the feeding rack (402), and a feeding pipe (404) connected to the discharge end pipe of the feeding pump (401); wherein The feed pump (401) is fixed on the feed rack (402), and the feed end is connected to the transfer barrel (403); and The other end of the feed pipe (404) is fixed to the middle of the blade holder (202) and is connected to the closed scraper chamber (201) to feed material into the closed scraper chamber (201).

6. The closed scraper device with pressure detection according to claim 5, characterized in that: The feeding assembly (4) further comprises: a return pipe (405) communicating with the transfer barrel (403), two branch pipes (406) connected to the return pipe (405), and a valve (407) provided on the return pipe (405); wherein The other ends of the two branch pipes (406) are respectively fixed on both sides of the blade holder (202) and are respectively communicated with the closed scraper chamber (201).

7. The closed scraper device with pressure detection according to claim 6, characterized in that: The feeding assembly (4) further comprises: an iron remover (408) arranged between the feeding pipe (404) and the feeding pump (401); wherein Both ends of the iron remover (408) are connected to the feed pipe (404) and the discharge pipe of the feed pump (401) respectively.

8. The closed scraper device with pressure detection according to claim 7, characterized in that: The feed assembly (4) further comprises: a filter (409) disposed between the iron remover (408) and the feed pipe (404); wherein The two ends of the filter (409) are respectively connected to the feed pipe (404) and the iron remover (408) pipeline.

9. The closed scraper device with pressure detection according to claim 8, characterized in that: The scraper assembly (2) further comprises a reinforcement member (206) arranged on the blade seat (202).

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