Automatic metering mechanism for PVC film production raw materials

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) film processing, and discloses an automatic PVC film production raw material metering mechanism, which comprises a conveying hopper, an automatic metering device and a control device, the scraping plate is rotationally connected into the conveying hopper, and the scraping plate is in sliding contact with the side wall face of the containing cavity; the spiral blade is rotationally connected to the inner bottom of the containing cavity, and the spiral blade can form conveying acting force facing the conveying pipe in the containing cavity; the weighing box is arranged below the conveying pipe and communicated with the discharging end of the conveying pipe, a metering scale is arranged on the inner wall of the bottom end of the weighing box, one side of the weighing box is communicated with a discharging pipe, a push plate is connected to the side, opposite to the discharging pipe, of the inner wall face of the weighing box in a sliding mode, the push plate is in sliding contact with the top face of the metering scale, and a control piece connected with the push plate is arranged in the weighing box. The control piece is electrically connected with the automatic valve and the metering scale. Resource waste can be reduced, the metering effect on PVC film raw materials is improved, and the metering accuracy is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to PVC film processing technical field especially relates to a PVC film production raw material automatic metering mechanism. BACKGROUND

[0002] PVC main component is polyvinyl chloride, is slightly yellowish translucent, has luster. The transparency is superior to polyethylene, polypropylene, is inferior to polystyrene, with the different dosage of auxiliary agent, is divided into soft, hard polyvinyl chloride. Because the processing production demand of PVC film is different, the matching proportion of PVC raw material is also different, and most of the prior art is matched by manual, and although part automatic metering mechanism can replace manual to improve matching precision and efficiency, but there are still some defects in the actual use process.

[0003] Such as in the patent number for CN219551672U a high-precision metering mechanism, through the accommodation box of square structure and the communication of connecting pipe, and install automatic valve in connecting pipe, because PVC raw material is granular, especially the surface of soft PVC raw material particle is rich in adhesion, therefore, easy to stick in the inner wall of square accommodation box, cause resource waste.

[0004] And the prior art passes into the raw material to the weighing box, utilizes the gravity effect to make the weighing box slide down to contact with the switch controller, thereby the raw material reaching the weight is passed out, realizes the weighing measurement. But the prior art does not propose how to reset the weighing box, that is, how to keep the weighing box return to the initial height after weighing, and the common spring is used to reset the weighing box and support, because the spring is extruded during the descending process of weighing box, the elastic action gradually strengthens, so the movement of weighing box is based on the multiple increase of raw material weight, and the weight growth law curve is not smooth, so that the weighing is carried out by the movement of weighing box and the contact with the switch controller, which can cause inaccurate measurement result, finally, the PVC matching error is large, which affects the production quality of PVC film. Therefore, an automatic PVC film production raw material metering mechanism is urgently needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a PVC film production raw material automatic metering mechanism to solve the problems existing in the prior art, which can reduce resource waste, improve the metering effect of PVC film raw material and enhance the metering accuracy.

[0006] To achieve the above object, the utility model provides the following scheme: the utility model provides a PVC film production raw material automatic metering mechanism, which comprises:

[0007] The conveying hopper defines a containing cavity for containing PVC raw materials in the inside, the containing cavity bottom end is connected with the conveying pipe, and the automatic valve is arranged on the conveying pipe;

[0008] a scraper rotatably connected in the conveying hopper, the scraper being in sliding contact with the side wall surface of the containing cavity;

[0009] a spiral blade rotatably connected to the bottom of the containing cavity, the spiral blade being capable of forming a conveying force towards the conveying pipe in the containing cavity;

[0010] a weighing box arranged below the conveying pipe and in communication with the discharging end of the conveying pipe, an inner wall of the bottom end of the weighing box being provided with a metering scale, one side of the weighing box being in communication with a discharging pipe, and a push plate being slidably connected to the side of the weighing box opposite to the discharging pipe, the push plate being in sliding contact with the top surface of the metering scale, the weighing box being provided with a control member connected to the push plate, the control member being electrically connected to the automatic valve and the metering scale respectively.

[0011] Preferably, the control member comprises:

[0012] at least one servo cylinder fixed to one side of the outer wall surface of the weighing box, a piston end of the servo cylinder extending into the weighing box and being fixed to the push plate;

[0013] a single-chip microcomputer fixed in the weighing box, the single-chip microcomputer being electrically connected to the metering scale, the automatic valve and the servo cylinder respectively.

[0014] Preferably, the device further comprises:

[0015] a driving rod rotatably connected to the center of the containing cavity in the vertical direction, the scraper and the spiral blade being fixed to the driving rod in sequence from top to bottom;

[0016] a driving motor fixed in the top of the conveying hopper, an output shaft of the driving motor being coaxially fixed to the driving rod.

[0017] Preferably, the scraper has an L-shaped structure, and a pair of the scrapers are oppositely arranged, short edges of the pair of scrapers being fixed to the top of the side wall surface of the driving rod, and long edges of the scrapers being in sliding contact with the inner wall surface of the containing cavity.

[0018] Preferably, the bottom of the containing cavity has a conical structure, and the diameter of the spiral blade gradually decreases in the vertical direction.

[0019] Preferably, a micro vibration motor is fixed to the bottom end of the outer wall of the discharging pipe.

[0020] Preferably, the device further comprises:

[0021] a transport box movably arranged below the discharging pipe along the direction of the production line, the top end of the transport box being an open end, and the end of the discharging pipe away from the conveying hopper extending downwardly and obliquely;

[0022] The support frame is placed on the ground, and the conveying hopper and the weighing box are fixedly connected with the support frame, wherein the conveying hopper is provided with a pair of center symmetrical conveying hoppers along the transportation box.

[0023] Preferably, further comprising:

[0024] The storage box is provided on one side of the conveying hopper, a spiral conveyor is communicated at the top end of the storage box, and the discharge port of the spiral conveyor extends upward in an inclined manner and is communicated with the top end of the containing cavity through a communication pipe.

[0025] The utility model discloses the following technical effects:

[0026] In the technical scheme, the scraper and the spiral blade are connected in the containing cavity, so that the inner wall surface of the containing cavity is scraped, the waste of resources caused by the adhesion of PVC soft particles to the inner wall of the conveying hopper is reduced, the measurement effect is improved, in addition, after the PVC raw material is sent out through the conveying pipe, the weight signal is obtained through the measurement scale of the weighing box, so that the measurement accuracy is improved, when the measurement requirement is met, the automatic valve is closed and drives the push plate to move along the discharge pipe direction, and the weighed PVC raw material is sent out of the weighing box, compared with the prior art, accurate weighing can be realized, and the measurement effect of the PVC film raw material is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0028] Figure 1 The position relationship diagram of the conveying hopper and the transportation box in the utility model;

[0029] Figure 2 The position relationship diagram of the storage box and the conveying hopper in the utility model;

[0030] Figure 3 The structure diagram of the scraper and the spiral blade in the utility model;

[0031] Figure 4 The connection relationship diagram of the scraper and the measurement scale in the utility model;

[0032] Wherein, 1, conveying hopper; 2, conveying pipe; 3, scraper; 4, spiral blade; 5, weighing box; 6, metering scale; 7, discharge pipe; 8, push plate; 9, automatic valve; 10, servo cylinder; 11, single-chip microcomputer; 12, drive rod; 13, drive motor; 14, miniature vibration motor; 15, transport box; 16, conveying belt; 17, support frame; 18, storage box; 19, screw conveyor; 20, communication pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be described in further detail below with reference to the drawings and specific embodiments.

[0035] Reference Figures 1-4 The utility model provides a kind of automatic metering mechanism of PVC film production raw material, comprising:

[0036] Conveying hopper 1, the inside is limited to be used for containing the containing cavity of PVC raw material, containing cavity bottom end is communicated with conveying pipe 2, and automatic valve 9 is arranged on conveying pipe 2;

[0037] Scraper 3 is rotationally connected in conveying hopper 1, and scraper 3 is in sliding contact with the side wall surface of containing cavity;

[0038] Spiral blade 4 is connected to the bottom of containing cavity, and spiral blade 4 can form conveying force towards conveying pipe 2 in containing cavity;

[0039] Weighing box 5 is arranged below conveying pipe 2 and is communicated with the discharge end of conveying pipe 2, and metering scale 6 is arranged on the inner wall of the bottom end of weighing box 5, one side of weighing box 5 is communicated with discharge pipe 7, and push plate 8 is slidably connected to the side of the inner wall of weighing box 5 opposite to discharge pipe 7, push plate 8 is in sliding contact with the top surface of metering scale 6, and control member connected with push plate 8 is arranged in weighing box 5, and control member is electrically connected with automatic valve 9 and metering scale 6 respectively.

[0040] The scraping plate 3 and the spiral blade 4 are connected in the containing cavity, so that the inner wall surface of the containing cavity is scraped, the waste of resources caused by the adhesion of PVC soft particles to the inner wall of the conveying hopper 1 is effectively reduced, the metering effect is improved, in addition, after the PVC raw material is sent out through the conveying pipe 2, the weight signal is obtained through the metering scale 6 of the weighing box 5, so that the accuracy of metering is improved, when the metering requirement is met, the automatic valve 9 is closed and drives the push plate 8 to move along the direction of the discharge pipe 7, and the weighed PVC raw material is sent out of the weighing box 5, compared with the prior art, accurate weighing can be realized, and the metering effect of the PVC film raw material is improved.

[0041] Specifically, the metering scale 6 can be a common industrial metering scale 6, which is a conventional device for weighing PVC raw material particles, and will not be described in detail.

[0042] Further, the control member comprises:

[0043] At least one servo cylinder 10 is fixed to one side of the outer wall surface of the weighing box 5, and the piston end of the servo cylinder 10 extends into the weighing box 5 and is fixed to the push plate 8;

[0044] The single-chip microcomputer 11 is fixed in the weighing box 5, and the single-chip microcomputer 11 is electrically connected with the metering scale 6, the automatic valve 9 and the servo cylinder 10 respectively.

[0045] An accurate weight signal is obtained by using the metering scale 6, when the weight signal meets the set value of the single-chip microcomputer 11, the single-chip microcomputer 11 generates an electric signal quality, controls the automatic valve 9 to be closed, and controls the servo cylinder 10 to be started at the same time, so that the PVC raw material particles placed on the top surface of the metering scale 6 are directly discharged from the discharge pipe 7 through the push plate 8, the conveying of the accurately weighed PVC raw material is completed, and the metering effect is improved, and when the PVC raw material is discharged from the discharge pipe 7, the push plate 8 is retracted by controlling the servo cylinder 10, and the automatic valve 9 is opened for the next metering scale 6.

[0046] Specifically, the automatic valve 9 can adopt a common PLC control valve, and the working principle of the single-chip microcomputer 11 controlling the opening and closing of the automatic valve 9 and the servo cylinder 10 through the PLC control system is a conventional technology, which will not be described in detail.

[0047] Further, it further comprises:

[0048] The driving rod 12 is connected in the center of the containing cavity in the vertical direction, and the scraping plate 3 and the spiral blade 4 are sequentially fixed to the driving rod 12 from top to bottom;

[0049] The driving motor 13 is fixed in the top of the conveying hopper 1, and the output shaft of the driving motor 13 is coaxially fixed with the driving rod 12.

[0050] The scraper 3 and the spiral blade 4 are driven to rotate by the driving motor 13, so as to scrape the inner wall of the accommodating cavity, reduce the adhesion of the PVC raw material particles, guide the PVC raw material particles along the direction of the conveying pipe 2, and improve the conveying efficiency.

[0051] Further, the scraper 3 is in L-shaped structure, and a pair of scrapers 3 are oppositely arranged, and the short edges of the pair of scrapers 3 are fixed to the top of the side wall of the driving rod 12, and the long edges of the scrapers 3 are in sliding contact with the inner wall of the accommodating cavity.

[0052] Further, the bottom of the accommodating cavity is in conical structure, and the diameter of the spiral blade 4 gradually decreases along the vertical downward direction.

[0053] According to the internal structure of the accommodating cavity, the shape of the spiral blade 4 of the scraper 3 is designed, so that the scraper 3 and the spiral blade 4 are effectively matched with the inner wall of the accommodating cavity during rotation, and the treatment effect of the PVC raw material particles is guaranteed.

[0054] Further, the bottom end of the discharge pipe 7 is fixedly connected with a micro vibration motor 14.

[0055] The micro vibration motor 14 is used to improve the discharging speed of the discharge pipe 7, and reduce the blockage in the discharge pipe 7.

[0056] Further, it further comprises: a transport box 15 movably arranged below the discharge pipe 7 along the production line direction, the top end of the transport box 15 is an open end, and the end of the discharge pipe 7 away from the conveying hopper 1 extends downwardly and obliquely; a support frame 17 placed on the ground, and the conveying hopper 1 and the weighing box 5 are fixedly connected with the support frame 17, wherein the conveying hopper 1 is symmetrically arranged with a pair of conveying hoppers 1 along the center of the transport box 15.

[0057] A pair of conveying hoppers 1 are symmetrically arranged along the center of the transport box 15, so as to increase the types of PVC raw material particles, and a pair of weighing boxes 5 and metering scales 6 are correspondingly arranged to accurately measure different types of PVC raw material particles.

[0058] The transport belt 16 is used to transport the transport box 15, after the push plate 8 pushes the PVC raw material particles into the discharge pipe 7, the discharge pipe 7 transports the PVC raw material particles towards the top end of the transport box 15, and the support frame 17 can guarantee that the weighing box 5 and the conveying hopper 1 are stably fixed to the ground.

[0059] Further, it further comprises: a storage box 18 arranged on one side of the conveying hopper 1, a spiral conveyor 19 communicatively arranged at the top end of the storage box 18, and the discharge port of the spiral conveyor 19 extends upwardly and obliquely and is in communication with the top end of the accommodating cavity through a communication pipe 20.

[0060] The PVC raw material particles are stored by the storage tank 18, and are inclinedly upwardly conveyed by the screw conveyor 19, and the particles are sent into the containing cavity by the communicating pipe 20, so that the subsequent automatic metering step is realized.

[0061] The working principle of the automatic raw material metering mechanism for PVC film production is as follows:

[0062] The PVC raw material particles are conveyed into the conveying hopper 1 by the screw conveyor 19, the driving motor 13 is started, the scraper 3 and the spiral blade 4 are driven to rotate by the driving rod 12, the automatic valve 9 is opened, the raw material particles are conveyed into the weighing box 5, the weighing meter 6 is provided to perform weighing metering, when the metering requirement is met, the weight signal of the weighing meter 6 is obtained by the single-chip microcomputer 11, and is converted into an electric driving instruction to control the automatic valve 9 to be closed and the servo motor to be started, after the raw material particles are stopped from being conveyed into the weighing box 5, the push plate 8 pushes the metered PVC raw material particles into the discharge pipe 7, the PVC raw material particles are conveyed into the transport box 15 through the discharge pipe 7, and are finally conveyed through the conveying belt 16, then the single-chip microcomputer 11 controls the servo motor to reversely move the push plate 8, the automatic valve 9 is opened when metering is needed next time, and the above steps are repeated.

[0063] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0064] The above-described embodiments are only used to describe the preferred modes of the utility model, and do not limit the scope of the utility model, under the premise that the design spirit of the utility model is not departed from, various deformations and improvements on the technical scheme of the utility model made by those skilled in the art should fall into the protection scope determined by the claims of the utility model.

Claims

1. A PVC film production raw material automatic metering mechanism, characterized in that, It includes: The conveying hopper (1) is internally defined as a containing cavity for containing PVC raw materials, and the bottom end of the containing cavity is communicated with a conveying pipe (2), and an automatic valve (9) is arranged on the conveying pipe (2); The scraper (3) is rotatably connected in the conveying hopper (1), and the scraper (3) is in sliding contact with the side wall of the containing cavity; The spiral blade (4) is connected to the bottom of the containing cavity, and the spiral blade (4) can form a conveying force towards the conveying pipe (2) in the containing cavity; The weighing box (5) is arranged below the conveying pipe (2) and is communicated with the discharge end of the conveying pipe (2), the inner wall of the bottom end of the weighing box (5) is provided with a metering scale (6), one side of the weighing box (5) is communicated with a discharge pipe (7), and the inner wall of the weighing box (5) is slidably connected with a push plate (8) on the side opposite to the discharge pipe (7), the push plate (8) is in sliding contact with the top surface of the metering scale (6), the weighing box (5) is provided with a control member connected with the push plate (8), and the control member is electrically connected with the automatic valve (9) and the metering scale (6) respectively.

2. The automatic metering mechanism for PVC film production raw materials according to claim 1, characterized in that, The control member includes: At least one servo cylinder (10) is fixed to one side of the outer wall of the weighing box (5), the piston end of the servo cylinder (10) extends into the weighing box (5) and is fixed to the push plate (8); The single-chip microcomputer (11) is fixed in the weighing box (5), and the single-chip microcomputer (11) is electrically connected with the metering scale (6), the automatic valve (9) and the servo cylinder (10) respectively.

3. The automatic metering mechanism for PVC film production raw materials according to claim 1, characterized in that, It also includes: The drive rod (12) is connected in the center of the containing cavity in the vertical direction, and the scraper (3) and the spiral blade (4) are sequentially fixed to the drive rod (12) from top to bottom; The drive motor (13) is fixed in the top of the conveying hopper (1), and the output shaft of the drive motor (13) is coaxially fixed to the drive rod (12).

4. The automatic metering mechanism for PVC film production raw materials according to claim 3, characterized in that: The scraper (3) is L-shaped, and a pair of scrapers (3) are oppositely arranged, the short side of one pair of scrapers (3) is fixed to the top of the side wall of the drive rod (12), and the long side of the scraper (3) is in sliding contact with the inner wall of the containing cavity.

5. The automatic metering mechanism for PVC film production raw materials according to claim 1, characterized in that: The bottom of the containing cavity is conical, and the diameter of the spiral blade (4) gradually decreases in the vertical direction.

6. The automatic metering mechanism for PVC film production raw materials according to claim 1, characterized in that: The bottom end of the discharge pipe (7) is fixed with a micro vibration motor (14).

7. The automatic metering mechanism for PVC film production raw material according to claim 1, characterized in that, It also includes: The transport box (15) is movably arranged below the discharge pipe (7) along the production line direction, the top end of the transport box (15) is an open end, and the end of the discharge pipe (7) away from the conveying hopper (1) extends downward; The support frame (17) is placed on the ground, and the conveying hopper (1) and the weighing box (5) are fixed to the support frame (17), wherein the conveying hopper (1) is symmetrically arranged with a pair of transport boxes (15) in the center.

8. The automatic metering mechanism for PVC film production raw material according to claim 1, characterized in that, It also includes: A storage box (18) is arranged at one side of the conveying hopper (1), and a top end of the storage box (18) is communicated with a screw conveyor (19), and a discharge port of the screw conveyor (19) extends in an inclined upward direction and is communicated with the top end of the accommodating cavity through a communicating pipe (20).

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