CN219133190U - Net fixing device for plunger net replacement - Google Patents

Abstract

A fixed net device for replacing net of plunger is prepared as setting a fixed net slot on net column, setting length of filter net to be set length according to circumference of outer circle of net column, folding two ends of filter net to be right angle of 11mm length, clamping right angles at two sides to edge in fixed net slot, pressing vertical bar in middle of T-shaped pressing bar to fixed net slot with net at two sides by vertical bar, setting a notch under horizontal bar and top of net column to pick up pressing bar by inserting notch under horizontal bar when net is needed to be replaced, taking off old filter net, replacing new filter net by pressing bar onto top of net, pressing filter net by horizontal bar to complete net replacement.

Description

Net fixing device for plunger net replacement

Technical Field

The technology belongs to a machine head net-changing part in the field of chemical mechanical rubber-plastic extruders.

Background

The extruder of the chemical machinery is used for processing molten rubber and plastic materials, a filter screen is arranged at the end of extrusion to filter the materials conveniently, so that unexpected impurities are prevented, the filter screen works for a certain time or is blocked by the impurities, a new screen is replaced at the moment, the screen is in various forms, the processing of the new raw materials is generally completed through common screen replacement, the screen replacement is flat screen pasting, and the area of the screen is small. The common net replacement for processing the recycled old plastic is not performed, because the recycled old plastic has too many impurities and has different working time, the net is blocked by the impurities, and frequent net replacement is caused. At present, a plunger screen replacing method is generally adopted in the industry, a filter screen is arranged by the plunger screen replacing method according to the diameter of the outer circle of the plunger, the area of the filter screen is increased by a plurality of times, the screen replacing times are reduced, and the working efficiency is improved. Fig. 1 is a structure diagram of a plunger screen replacing commonly used at present, wherein in the figure, 1 is a gland, 2 is a plugging column, 3 is a filtering material small hole, and all the small holes are communicated with a filtering screen runner. The filter screen column 4, the plunger seat 5, the discharging passing hole on the plunger seat 6, the filter screen flow channel and the discharging hole in the middle of 7, the plunger guide column 8, the piston rod 9, the feeding passing hole on the plunger seat 10 and the plunger space 11. The working steps are as follows; the melted material of the extruder enters the plunger space 11 from the feeding material passing hole 10 on the plunger seat 5, the diameter of the plunger 4 is smaller than that of the plunger seat, thus a plunger space 11 is formed between the filter screen column 4 and the plunger seat 5, the material flows to one circle of the filter screen column 4 in the plunger space 11, and flows out from the discharging material passing hole 6 of the plunger seat 5 through the filter screen 13 (figure 2), the filter material small holes 3 and the filter screen flow channel 7 to the next step of work. When the filter screen 13 is blocked and needs to be replaced, the piston rod 9 pushes the guide column 8 to push the gland 1, the blocking column 2 and the filter screen column 4 of the whole plunger out of the plunger seat 5, as shown in fig. 2, the filter screen can be replaced at this time, and after the filter screen is replaced, the piston rod is pulled into the plunger seat to continue to filter materials. At present, the screen changing has a disadvantage that as shown in fig. 2, the screen 13 wrapped on the outer circle of the screen column 4 is outwards scattered because of being looped on a cylinder, the current solution is to bind a plurality of iron wires 12 outside the screen 13, the iron wire 12 is bound with great effort to prolong the screen changing time, the iron wire 12 is not needed for the next screen changing, the iron wire 12 is discarded, the screen is bound again, the length of the screen 13 is longer than the circumference of the plunger 4, and the grown screen covers the joints of the screen to ensure that the joints of the screen are completely covered, no material leakage exists, and a small section of screen is actually wasted.

Disclosure of Invention

The utility model relates to a net fixing device for plunger net replacement, which is characterized in that a net fixing long groove is arranged on a filter net column, the groove is in a right angle shape, the depth is 13mm, the width is 9mm, the length is the width of the filter net column, the filter net is set to be a length according to the circumference of the outer circle of the filter net column, the two ends of the length are folded to be right angles with the length of 11mm, the right angles on two sides are just clamped at the edge in the net fixing long groove, a vertical rib is arranged in the middle of a T-shaped pressing strip, the width of the vertical rib is 7mm, the depth is 10mm, the vertical rib is matched and pressed into the net fixing long groove with nets on two sides, the width of a transverse rib on the T-shaped pressing strip is 19mm, the thickness is 6mm, the upper part, the lower part and the upper part and the lower part of the transverse rib are in the same circular arc, one end of the pressing strip is provided with a notch below the transverse rib.

When the screen is required to be replaced, the screw is used for inserting the notch below the transverse rib to pry up the compression bar, namely, the compression bar is taken off, the old filter screen is detached, the new filter screen is replaced, the compression bar is pressed in, the upper transverse rib presses the filter screen, the screen replacement is completed, the screen replacement speed is fast and accurate, the filter screen works reliably, the consumption of iron wires is also saved, the length of the filter screen is saved, and the compression bar cannot run out due to the fact that the plunger space has pressure to be inwards pressed.

Drawings

Fig. 1 is a schematic diagram of a plunger screen-changing structure commonly used at present. In the figure, 1 is a gland, 2 is a plugging column, 3 is a filter material small hole, all the small holes are communicated with a filter screen runner, 4 is a filter screen column, 5 is a plunger seat, 6 is a discharging material passing hole on the plunger seat, 7 is a filter screen runner and a discharging hole in the middle of the plunger seat, 8 is a plunger guide column, 9 is a piston rod, 10 is a feeding material passing hole on the plunger seat, and 11 is a filter screen space.

Fig. 2 is a diagram of binding a filter column with a filter screen and then using an iron wire, wherein 12 is the iron wire and 13 is the filter screen.

Fig. 3 is a schematic diagram of an improved net fixing device for changing net by a plunger. In the figure, 13 is a filter screen, 14 is a compression bar in dotted line, and 15 is a fixed-mesh long groove.

Fig. 4 is a compression bar chart. In the figure, 14 is a compression bar, 16 is a vertical bar, 17 is a horizontal bar, and 18 is a notch.

Fig. 5 is a screen edge view. In the figure 13 is the screen and 19 is the folded right angle of the screen.

Detailed Description

Specifically, the structure of the utility model is described in detail with reference to the accompanying drawings, fig. 3 is a schematic structural diagram of a screen fixing device for a plunger screen replacement of the utility model, a screen fixing long groove (15) is arranged in the middle of a screen column (4), the groove is rectangular, the groove depth is 13mm, the groove width is 9mm, and the groove length is the same as the width of the screen column (4). Fig. 5 shows a filter screen (13), wherein the filter screen (13) is provided with a length according to the outer circumference of a filter screen column (4), and is folded at right angles (19) of 90 degrees at two ends of the length, the length of the right angles is 11mm, and the right angles (19) at two sides are just clamped at two edges in a fixed-net long groove (15) after being rounded. The T-shaped compression bar (14) is arranged in the figure 4, the compression bar (14) consists of a vertical bar (16) and a horizontal bar (17), the width of the vertical bar (16) is 7mm, the depth is 10mm, the vertical bar is matched and pressed into a fixed-net long groove with nets at two sides, the thickness of a filter screen (13) is 1mm, two nets at two sides are 2mm, the 7mm of the vertical bar (16) is just 9mm, the width of the vertical bar is equal to the width of the fixed-net long groove (15), in practical application, the width of the root of the vertical bar (16) can be 0.1mm larger than the width of the head of the vertical bar, so that the T-shaped compression bar (14) is pressed downwards, the upper horizontal bar (17) is pressed more tightly, the thickness is 6mm, the upper surface and the lower surface of the horizontal bar (17) are the same circular arcs, the two circular arc surfaces are pressed together, the two contacted compression filter screens are not easy to loosen, a notch is formed below the horizontal bar (17) of the compression bar (14), and a Chinese character 'qi' shaped screwdriver is inserted into the notch, and the compression bar can be pried.

In practical application, when the screen is required to be replaced, a straight screwdriver is used for inserting the notch (18), the pressing strip (14) is pried up, the pressing strip (14) can be taken off, the old filter screen is taken off again, the new filter screen (13) is arranged, the pressing strip (14) is pressed in, screen replacement and screen fixing are completed, and the piston rod can be started to work. The net replacement speed is fast and accurate, the consumption of iron wires is also saved, and the length of a filter screen is saved. Because the material in the filter screen space (11) has pressure and flows towards the center of the filter screen column (4), the pressure presses the pressing strip, and the pressing strip cannot fall out, so that the filter screen space is safe.

The foregoing description of the preferred embodiment of the utility model is merely illustrative of the utility model and is not intended to be limiting. It will be appreciated by persons skilled in the art that many variations, modifications, and even equivalents may be made thereto without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (1)

1. A plunger screen-changing screen-fixing device is characterized in that: the filter screen column is provided with a fixed-net long groove, the groove is in a right-angle shape, the depth is 13mm, the width is 9mm, the length is the width of the filter screen column, the filter screen is set to be longer according to the circumference of the outer circle of the filter screen column, the right angles of the two sides are folded at the right angles of 11mm at the two ends of the length, the right angles of the two sides are just clamped at the edge in the fixed-net long groove, a vertical rib is arranged in the middle of the T-shaped pressing strip, the width of the vertical rib is 7mm, the depth is 10mm, the T-shaped pressing strip is matched and pressed into the fixed-net long groove with the nets at the two sides, the width of the transverse rib above the T-shaped pressing strip is 19mm, the thickness is 6mm, the upper surface and the lower surface of the transverse rib are in the same circular arc as the filter screen column, one end of the pressing strip is provided with a notch below the transverse rib.

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