A plastic particle feeding device

Abstract

The present application relates to a plastic particle feeding device and to the technical field of feeding devices, which comprises a storage hopper, wherein the storage hopper is provided with a feeding pipe for the entry of plastic particles and a discharging pipe for the discharge of plastic particles, the feeding pipe is provided with a first control valve, and the discharging pipe is provided with a second control valve; a vacuum machine, a horizontally placed pressure tank and a supporting assembly for supporting the pressure tank are provided on the side of the storage hopper, the pressure tank is provided with an exhaust pipe connected to the storage hopper and a vacuum tube connected to the vacuum machine, a first regulating valve is provided at the end of the exhaust pipe, and a second regulating valve is provided on the vacuum tube; in the present application, when the pressure tank is used for feeding plastic particles, the negative pressure environment inside the pressure tank can be maintained for a long time; therefore, there is no need to frequently start the vacuum machine, and simply opening the first regulating valve on the pressure tank can meet the feeding needs of the storage hopper, thereby reducing the frequency of opening and closing the vacuum machine.

Description

Technical Field

[0001] The present application relates to the technical field of feeding equipment, and in particular to a plastic particle feeding equipment. Background Art

[0002] In modern industrial production, injection molding technology is widely used in the production of various parts, including precision parts such as sensor housings. In this process, plastic particles are key raw materials, and their processing efficiency and quality directly affect the performance and cost of the final product. In order to improve production efficiency and ensure the purity and uniformity of plastic particles before processing, a storage hopper is usually set in front of the injection molding machine, and a negative pressure system (vacuum machine) is used to automatically suck the plastic particles into the storage hopper for subsequent melting, injection molding and other processes.

[0003] At present, the negative pressure system widely used in the market can efficiently extract plastic particles from packaging or containers and transport them to the storage hopper. This process realizes automated operation, reduces manual intervention, and improves the overall efficiency of the production line. At the same time, the negative pressure system can effectively prevent external impurities from entering the plastic particles, ensuring the quality of raw materials. However, as the production pace accelerates, the plastic particles in the storage hopper will continue to be consumed. When the reserve is insufficient, the vacuum machine needs to be restarted to replenish it.

[0004] Although the negative pressure system has shown significant advantages in the transportation of plastic particles, the existing technology still has some problems in practical application. In particular, when the plastic particles in the storage hopper are consumed, the vacuum machine needs to be frequently started and stopped to maintain the continuous operation of the production line. This constant start-stop operation not only increases the burden on the operator, but more importantly, it leads to a large amount of energy loss. Frequent start-stopping will increase the wear of the vacuum machine, shorten its service life, and increase electricity consumption, which is not conducive to the company's energy conservation, emission reduction and cost control, and there is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a plastic particle feeding device to solve the problem in the above-mentioned related technology that a vacuum machine needs to be frequently started to feed plastic particles, resulting in a large amount of energy loss and affecting the service life of the vacuum machine.

[0006] The present application provides a plastic particle feeding device that adopts the following technical solution:

[0007] A plastic particle feeding device comprises a storage hopper, wherein the storage hopper is provided with a feeding pipe for plastic particles to enter and a discharging pipe for plastic particles to discharge, the feeding pipe is provided with a first control valve, and the discharging pipe is provided with a second control valve; a vacuum machine, a horizontally placed pressure tank and a supporting assembly for supporting the pressure tank are provided on the side of the storage hopper, the pressure tank is provided with an exhaust pipe connected to the storage hopper and a vacuum tube connected to the vacuum machine, a first regulating valve is provided at the end of the exhaust pipe, and a second regulating valve is provided on the vacuum tube.

[0008] By adopting the above technical scheme, in the process of feeding plastic particles into the storage hopper, the vacuum machine is started in advance to form a negative pressure environment in the pressure tank, and then the pressure tank is sealed and the vacuum machine is turned off, and the negative pressure environment in the pressure tank is used to form a negative pressure environment in the storage hopper, and then the negative pressure suction is used to transport the plastic particles; when the pressure tank is used for feeding plastic particles, the negative pressure environment inside itself can be maintained for a long time; therefore, when the plastic particles in the subsequent storage hopper are consumed and need to be re-fed, there is no need to frequently start the vacuum machine, and the feeding needs of the storage hopper can be met by opening the first regulating valve on the pressure tank alone, thereby reducing the frequency of opening and closing of the vacuum machine, extending the service life of the vacuum machine, and reducing the corresponding energy loss.

[0009] Optionally, the support assembly includes a base plate located below the pressure tank and a plurality of limit plates arranged on the base plate; the plurality of limit plates are symmetrically distributed on both sides of the pressure tank, and the limit plates are provided with arc-shaped limit grooves that are compatible with the outer circumference of the pressure tank.

[0010] By adopting the above technical solution, when the pressure tank is installed, the base plate is placed on the ground at the installation location in advance, and then the pressure tank is installed on the base plate in a horizontal direction, so that the arc-shaped limit groove on the limit plate abuts and fits with the lower outer peripheral surface of the pressure tank, thereby realizing the installation of the pressure tank.

[0011] Optionally, the limiting plate is fixedly provided with a shock-absorbing pad on the inner wall of the arc-shaped limiting groove.

[0012] By adopting the above technical solution, due to the application and setting of the shock-absorbing pad, the influence of ground vibration on the pressure tank is reduced, and the shock-absorbing performance of the pressure tank is improved.

[0013] Optionally, a support seat hinged to one end of the limiting plate is fixedly provided on the base plate, a support rod for supporting the limiting plate is hinged on the base plate, and a support groove for inserting the upper end of the support rod is provided on the limiting plate.

[0014] By adopting the above technical solution, when the support assembly is packaged and transported separately, the support rod can be rotated into the placement groove, and then the limit plate can be rotated in the direction close to the base plate, thereby reducing the transportation space occupied by the support assembly; at this time, when installing the pressure tank, a lifting equipment is usually required to lift the pressure tank and move it to the top of the base plate for installation. Due to the hinged setting of the limit plate, the limit plate is rotated to a lower position in advance, so the lifting height of the pressure tank can be reduced. After the pressure tank is hoisted above the base plate, the limit plate is rotated upward and supported by the support rod, thereby reducing the difficulty of lifting.

[0015] Optionally, guide rods parallel to the length direction of the pressure tank are symmetrically arranged above the base plate, and ends of the limit plates on the same side of the pressure tank away from the base plate are fixedly connected to the guide rods.

[0016] By adopting the above technical solution, the staff can rotate the guide rod to drive the synchronous rotation of the three limit plates on the same side, which is convenient for the synchronous operation of several limit plates on the same side.

[0017] Optionally, a limit piece for limiting the two ends of the pressure tank is provided above the base plate, and the limit piece includes an arc-shaped rod with two ends hinged to each other; the ends of the two arc-shaped rods that are away from each other are provided with connecting pieces, and the lower part of the connecting piece is slidably connected to the guide rod, and the arc-shaped rod can rotate around the connecting piece and slide along the guide rod, and the inner side surface of the arc-shaped rod is in contact with the outer periphery of the end of the pressure tank; an elastic pad is fixedly provided on the side of the arc-shaped rod facing the pressure tank.

[0018] By adopting the above technical solution, due to the application and setting of the limiter, after the two arc rods are installed, the elastic pads on the inner sides of the two arc rods can fit with the outer periphery of the end of the pressure tank, thereby improving the installation stability of the pressure tank.

[0019] Optionally, the connecting member includes a fixed block hinged to the end of the arc rod and a guide slider fixed on the fixed block, and the guide rod is provided with a guide groove for the guide slider to be inserted and slide; the two arc rods can be rotated upward to a state of being in contact with the upper side of the pressure tank, and the two arc rods can slide along the length direction of the guide groove along with the fixed block.

[0020] By adopting the above technical solution, due to the setting of the fixed block and the guide slider, when the arc rod rotates from a horizontal state to a vertical state, the elastic pad cleans the dust adhered to the two ends of the pressure tank; when the two arc rods in the vertical state slide back and forth along the guide rod, the elastic pad cleans the outer peripheral surface of the upper part of the pressure tank; and the arc rod in the vertical state can limit and lock the upper side surface of the pressure tank.

[0021] Optionally, a traction rod for pulling the arc-shaped rod is provided above the base plate, one of the two arc-shaped rods is hinged to the end of the traction rod, and a gripping handle is provided on the outer periphery of the end of the traction rod away from the arc-shaped rod.

[0022] By adopting the above technical solution, due to the application setting of the traction rod, the staff can manually hold the gripping handle, and then adjust the state of the arc rod through the traction rod, and can also drive the two arc rods in the vertical state to slide back and forth along the guide rod.

[0023] Optionally, a protective assembly is provided above the substrate, and the protective assembly includes flexible protective curtains symmetrically provided on both sides of the pressure tank, the outer side surface of the guide rod is fixedly connected to the upper edge of the flexible protective curtain, and the lower edge of the flexible protective curtain abuts against the upper surface of the substrate.

[0024] By adopting the above technical solution, when it is necessary to unfold the flexible protective curtain to protect the lower side of the pressure tank, the flexible protective curtain is unfolded, thereby reducing the possibility of external dust or other impurities adhering to the lower outer side of the pressure tank.

[0025] Optionally, the guide rod is hinged with a plurality of fixing rings for fixing the flexible protective curtain in a folded state, and the other end of the fixing ring is fixed with a fixing portion; the fixing portion is provided with a fixing through hole, and the guide rod is provided with a fixing screw hole that can overlap the fixing through hole, and the side of the guide rod is provided with a fixing screw that penetrates the fixing through hole and is screwed into the fixing screw hole.

[0026] By adopting the above technical solution, when the support assembly is packaged and transported separately, the flexible protective curtain can be folded and stored, and the flexible protective curtain can be limited by a fixing clamp ring and further locked by a fixing screw.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the pressure tank is used for feeding plastic particles, the negative pressure environment inside it can be maintained for a long time; therefore, when the plastic particles in the subsequent storage hopper are used up and need to be re-fed, there is no need to frequently start the vacuum machine. Simply opening the first regulating valve on the pressure tank can meet the feeding needs of the storage hopper, thereby reducing the frequency of opening and closing the vacuum machine, extending the service life of the vacuum machine, and reducing the corresponding energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic diagram of the installation distribution of the pressure tank, storage hopper and vacuum machine according to Example 1 of the present application;

[0031] Figure 2 This is a schematic diagram of the overall structure of the pressure tank installation coordination in Example 1 of the present application;

[0032] Figure 3 This is a schematic diagram of the overall structure of the pressure tank installation coordination in Example 2 of the present application;

[0033] Figure 4 It is a cross-sectional structural schematic diagram of the installation and coordination of the pressure tank in Example 2 of the present application;

[0034] Figure 5 This is a schematic diagram of the structure of the installation and coordination of the protection components in Example 2 of the present application;

[0035] Figure 6 It is a partial cross-sectional structural schematic diagram of the installation and coordination of the protection component in Example 2 of the present application;

[0036] Figure 7 yes Figure 6 A magnified schematic diagram of part A;

[0037] Figure 8 It is a schematic diagram of the partial cross-sectional structure of the installation and cooperation of the limit member according to Example 2 of the present application.

[0038] In the figure, 1, storage hopper; 11, feed pipe; 111, first control valve; 12, discharge pipe; 121, second control valve; 2, vacuum machine; 3, pressure tank; 31, exhaust pipe; 311, first regulating valve; 32, vacuum tube; 321, second regulating valve; 4, support assembly; 41, base plate; 411, support seat; 412, placement groove; 42, limit plate; 421, arc limit groove; 422, support groove; 43, shock-absorbing pad; 44, support rod; 45, guide rod; 451, guide slide; 5, protection assembly; 51, flexible protection curtain; 52, fixing clamp; 521, fixing part; 53, fixing screw; 6, limit piece; 61, arc rod; 62, connector; 621, fixing block; 622, guide slider; 63, elastic pad; 64, traction rod; 641, holding handle. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0040] Embodiment 1:

[0041] Reference Figure 1A plastic particle feeding device comprises a storage hopper 1, wherein the storage hopper 1 is provided with a feeding pipe 11 for plastic particles to enter, and a discharging pipe 12 for plastic particles to discharge, the feeding pipe 11 is provided with a first control valve 111 for controlling its own on-off, and the discharging pipe 12 is provided with a second control valve 121 for controlling its own on-off;

[0042] A vacuum machine 2, a horizontally placed pressure tank 3 and a support assembly 4 for supporting the pressure tank 3 are arranged on the side of the storage hopper 1. The pressure tank 3 is provided with an exhaust pipe 31 connected to the storage hopper 1 and a vacuum pipe 32 connected to the vacuum machine 2. A first regulating valve 311 for controlling the on-off of the exhaust pipe 31 is arranged at the end thereof, and a second regulating valve 321 for controlling the on-off of the vacuum pipe 32 is arranged on the vacuum pipe 32.

[0043] The first control valve 111, the second control valve 121, the first regulating valve 311 and the second regulating valve 321 are all conventional solenoid valves; in the process of feeding plastic particles into the storage hopper 1, the vacuum machine 2 is started in advance to form a negative pressure environment in the pressure tank 3, and then the pressure tank 3 is sealed, the vacuum machine 2 is turned off, and the negative pressure environment in the pressure tank 3 is used to form a negative pressure environment in the storage hopper 1, and then the negative pressure suction is used to transport the plastic particles.

[0044] Reference Figure 2 The support assembly 4 includes a base plate 41 located below the pressure tank 3 and six limit plates 42 fixedly arranged on the base plate 41; the six limit plates 42 are symmetrically distributed on both sides of the pressure tank 3, and the limit plates 42 are provided with arc-shaped limit grooves 421 adapted to the outer periphery of the pressure tank 3, and the limit plates 42 are fixedly provided with rubber shock-absorbing pads 43 on the inner wall of the arc-shaped limit grooves 421. ;

[0045] When the pressure tank 3 is installed, the base plate 41 is placed on the ground at the installation location in advance, and then the pressure tank 3 is installed horizontally on the base plate 41 so that the arc-shaped limiting groove 421 on the limiting plate 42 abuts against the lower outer peripheral surface of the pressure tank 3, thereby realizing the installation of the pressure tank 3.

[0046] The implementation principle of the embodiment of the present application is:

[0047] In the process of the plastic pellet feeding device;

[0048] First, close the first regulating valve 311, open the second regulating valve 321, start the vacuum machine 2 in advance to extract the gas in the pressure tank 3, so that the pressure tank 3 is in a negative pressure environment, and finally close the second regulating valve 321;

[0049] Second, when the plastic particles need to be extracted from the original container and transported to the storage hopper 1, the first regulating valve 311 and the first control valve 111 are opened, and the second control valve 121 is closed, so that the storage hopper 1 is also formed into a negative pressure environment through the negative pressure environment in the pressure tank 3, thereby realizing the feeding of plastic particles from the feeding pipe 11;

[0050] Third, when the pressure tank 3 is used for feeding plastic particles, the negative pressure environment inside it can be maintained for a long time; therefore, when the plastic particles in the subsequent storage hopper 1 are used up and need to be re-fed, there is no need to frequently start the vacuum machine 2.

[0051] Embodiment 2:

[0052] Reference Figure 3 and Figure 4 The embodiment of the present application is different from the embodiment 1 in that a support seat 411 hinged to one end of the limiting plate 42 is fixedly provided on the base plate 41, wherein a support rod 44 for supporting the limiting plate 42 is hingedly provided on the base plate 41, a support groove 422 for inserting the upper end of the support rod 44 is provided on the limiting plate 42, and a placement groove 412 for rotatably placing the support rod 44 is provided on the base plate 41;

[0053] When the support assembly 4 is packaged and transported separately, the support rod 44 can be rotated into the placement groove 412, and then the limit plate 42 can be rotated in the direction close to the base plate 41, thereby reducing the transportation space occupied by the support assembly 4; at this time, when installing the pressure tank 3, a lifting equipment is usually required to lift the pressure tank 3 and move it to the top of the base plate 41 for installation. Due to the hinged setting of the limit plate 42, the lifting height of the pressure tank 3 can be reduced. When the pressure tank 3 is hoisted above the base plate 41, the limit plate 42 is rotated and supported by the support rod 44, thereby reducing the difficulty of hoisting.

[0054] Reference Figure 4 and Figure 5 Two guide rods 45 parallel to the length direction of the pressure tank 3 are provided above the base plate 41. The two guide rods 45 are respectively located on both sides of the pressure tank 3. The ends of the three limit plates 42 on the same side of the pressure tank 3 away from the base plate 41 are fixedly connected to the guide rods 45; the staff can rotate the guide rods 45 to drive the synchronous rotation of the three limit plates 42 on the same side.

[0055] Reference Figure 6 and Figure 7 A protective assembly 5 is provided above the substrate 41, wherein the protective assembly 5 includes flexible protective curtains 51 symmetrically provided on both sides of the pressure tank 3, the outer side surface of the guide rod 45 is fixedly connected to the upper edge of the flexible protective curtain 51, and the lower edge of the flexible protective curtain 51 can abut against the upper surface of the substrate 41 in the unfolded state;

[0056] A plurality of fixing rings 52 for fixing the folded flexible protective curtain 51 are hingedly connected to the guide rod 45, wherein the other end of the fixing ring 52 is integrally formed with a fixing portion 521; a fixing through hole is provided on the fixing portion 521, a fixing screw hole that can overlap the fixing through hole is provided on the guide rod 45, and a fixing screw 53 that penetrates the fixing through hole and is screwed into the fixing screw hole is provided on the side of the guide rod 45;

[0057] When the flexible protective curtain 51 needs to be folded and stored, the flexible protective curtain 51 is limited by the fixing clamp 52 and further locked by the fixing screw 53; when the flexible protective curtain 51 needs to be unfolded to protect the lower side of the pressure tank 3, the flexible protective curtain 51 is unfolded, thereby reducing the possibility of external dust or other impurities adhering to the lower outer side of the pressure tank 3.

[0058] Reference Figure 6 and Figure 8 A stopper 6 for limiting the two ends or the upper part of the pressure tank 3 is provided above the base plate 41, wherein the stopper 6 comprises an arc rod 61 with two ends hingedly connected; the ends of the two arc rods 61 away from each other are both provided with a connector 62, and the connector 62 comprises a fixed block 621 hingedly connected to the ends of the arc rod 61 and a guide slider 622 fixed on the fixed block 621, and a guide slide groove 451 for the guide slider 622 to be inserted and slide is provided on the guide rod 45;

[0059] The two arc rods 61 can be rotated to a horizontal state, in which the inner side surfaces of the two arc rods 61 fit against the outer periphery of the end of the pressure tank 3; the two arc rods 61 can be rotated upward to a vertical state, in which the inner side surfaces of the two arc rods 61 fit against the upper side surface of the pressure tank 3.

[0060] Reference Figure 8 The two arc rods 61 can slide along the length direction of the guide groove 451 along with the fixed block 621, and an elastic pad 63 made of rubber is fixed on the side of the arc rod 61 facing the pressure tank 3; when the arc rod 61 rotates from a horizontal state to a vertical state, the elastic pad 63 cleans the dust adhered to the two ends of the pressure tank 3; when the two arc rods 61 in the vertical state slide back and forth along the guide rod 45, the elastic pad 63 cleans the outer peripheral surface of the upper part of the pressure tank 3.

[0061] Reference Figure 8 A traction rod 64 for pulling the arc rod 61 is provided above the base plate 41. One of the two arc rods 61 is hinged (ball joint) to the end of the traction rod 64. A gripping handle 641 is fixed on the end of the traction rod 64 away from the arc rod 61. The staff can adjust the state of the arc rod 61 through the traction rod 64, and can also drive the two arc rods 61 in the vertical state to slide back and forth along the guide rod 45.

[0062] The implementation principle of the embodiment of the present application is:

[0063] When the support assembly 4 is packaged and transported separately, the flexible protective curtain 51 is folded and stored, and the support rod 44 is rotated into the placement groove 412, and then the limit plate 42 is rotated in the direction close to the base plate 41. During this process, the two arc rods 61 at both ends of the guide rod 45 are rotated in opposite directions and unfolded, thereby reducing the transportation space occupied by the support assembly 4;

[0064] When the pressure tank 3 is installed, the support assembly 4 in the transport state lowers the lifting height of the pressure tank 3. When the pressure tank 3 is hoisted above the base plate 41, the limit plate 42 is rotated and supported by the support rod 44, thereby reducing the difficulty of hoisting.

[0065] After the pressure tank 3 is installed, the flexible protective curtain 51 is unfolded to protect the lower side of the pressure tank 3. The flexible protective curtain 51 is unfolded to reduce the possibility of external dust or other impurities adhering to the outer side of the lower part of the pressure tank 3; and the two ends or the upper part of the pressure tank 3 are limited by the limiting member 6.

[0066] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0067] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic particle feeding device, comprising a storage hopper (1), the storage hopper (1) being provided with a feed pipe (11) for plastic particles to enter, and a discharge pipe (12) for plastic particles to discharge, the feed pipe (11) being provided with a first control valve (111), and the discharge pipe (12) being provided with a second control valve (121); It is characterized in that A vacuum machine (2), a horizontally placed pressure tank (3) and a support assembly (4) for supporting the pressure tank (3) are provided on the side of the storage hopper (1); an air extraction pipe (31) connected to the storage hopper (1) and a vacuum pipe (32) connected to the vacuum machine (2) are provided on the pressure tank (3); a first regulating valve (311) is provided at the end of the air extraction pipe (31); and a second regulating valve (321) is provided on the vacuum pipe (32); In the process of the plastic particle feeding device; first, the first regulating valve (311) is closed, the second regulating valve (321) is opened, and the vacuum machine (2) is started in advance to extract the gas in the pressure tank (3) so that the pressure tank (3) is in a negative pressure environment, and finally the second regulating valve (321) is also closed; Second, when the plastic particles need to be extracted from the original container and transported to the storage hopper (1), the first regulating valve (311) and the first control valve (111) are opened, and the second control valve (121) is closed, thereby creating a negative pressure environment in the storage hopper (1) through the negative pressure environment in the pressure tank (3), thereby enabling the plastic particles to be fed from the feed pipe (11); third, when the pressure tank (3) is used for feeding plastic particles, the negative pressure environment in the pressure tank (3) can be maintained for a long time; therefore, when the plastic particles in the subsequent storage hopper (1) are used up and need to be re-fed, there is no need to frequently start the vacuum machine (2).

2. A plastic particle feeding device according to claim 1, characterized in that: The support assembly (4) comprises a base plate (41) located below the pressure tank (3) and a plurality of limit plates (42) arranged on the base plate (41); the plurality of limit plates (42) are symmetrically distributed on both sides of the pressure tank (3), and the limit plates (42) are provided with arc-shaped limit grooves (421) adapted to the outer periphery of the pressure tank (3).

3. A plastic particle feeding device according to claim 2, characterized in that: The limiting plate (42) is fixedly provided with a shock-absorbing pad (43) on the inner wall of the arc-shaped limiting groove (421).

4. A plastic particle feeding device according to claim 2, characterized in that: The base plate (41) is fixedly provided with a support seat (411) hinged to one end of the limiting plate (42); the base plate (41) is hinged with a support rod (44) for supporting the limiting plate (42); the limiting plate (42) is provided with a support groove (422) for the upper end of the support rod (44) to be inserted.

5. A plastic particle feeding device according to claim 2, characterized in that: A guide rod (45) parallel to the length direction of the pressure tank (3) is symmetrically arranged above the base plate (41), and the ends of the limit plates (42) on the same side of the pressure tank (3) away from the base plate (41) are fixedly connected to the guide rod (45).

6. A plastic particle feeding device according to claim 5, characterized in that: A limiting member (6) for limiting the positions of the two ends of the pressure tank (3) is provided above the base plate (41), and the limiting member (6) comprises an arc-shaped rod (61) with two ends hingedly connected. The ends of the two arc-shaped rods (61) that are away from each other are both provided with a connecting piece (62), the lower part of the connecting piece (62) is slidably connected to the guide rod (45), the arc-shaped rod (61) can rotate around the connecting piece (62) and slide along the guide rod (45), and the inner side surface of the arc-shaped rod (61) is in contact with the outer periphery of the end of the pressure tank (3); the side of the arc-shaped rod (61) facing the pressure tank (3) is fixedly provided with an elastic pad (63).

7. A plastic particle feeding device according to claim 6, characterized in that: The connecting member (62) comprises a fixed block (621) hinged to the end of the arc-shaped rod (61) and a guide slide block (622) fixed on the fixed block (621); the guide rod (45) is provided with a guide slide groove (451) for the guide slide block (622) to be inserted and slide; The two arc-shaped rods (61) can be rotated upward to a state where they are in contact with the upper side of the pressure tank (3), and the two arc-shaped rods (61) can slide along the length direction of the guide slide groove (451) along with the fixing block (621).

8. A plastic particle feeding device according to claim 7, characterized in that: A traction rod (64) for pulling the arc-shaped rod (61) is provided above the base plate (41); one of the two arc-shaped rods (61) is hinged to the end of the traction rod (64); and a gripping handle (641) is provided on the end of the traction rod (64) away from the arc-shaped rod (61).

9. A plastic particle feeding device according to claim 5, characterized in that: A protection assembly (5) is provided above the base plate (41), and the protection assembly (5) comprises flexible protection curtains (51) symmetrically provided on both sides of the pressure tank (3), the outer side surface of the guide rod (45) is fixedly connected to the upper edge of the flexible protection curtain (51), and the lower edge of the flexible protection curtain (51) is in contact with the upper surface of the base plate (41).

10. A plastic particle feeding device according to claim 9, characterized in that: A plurality of fixing rings (52) for fixing the flexible protective curtain (51) in a folded state are hingedly connected to the guide rod (45), and a fixing portion (521) is fixedly disposed at the other end of the fixing ring (52); The fixing portion (521) is provided with a fixing through hole, the guide rod (45) is provided with a fixing screw hole capable of overlapping the fixing through hole, and the side surface of the guide rod (45) is provided with a fixing screw (53) that penetrates the fixing through hole and is screwed into the fixing screw hole.

Images