CN-224224488-U - Screen changer with sealing ring with reinforced structure for reducing dead material area

Abstract

The utility model provides a screen changer with a reinforced structure sealing ring for reducing dead material areas, which relates to the technical field of plastic processing and comprises a shell, a sliding plate, a pre-tightening device and an inlet pre-tightening spring, wherein a flow distribution cavity is formed in the shell, a sliding way is formed in the flow distribution cavity, the sliding way penetrates through the inner wall of the flow distribution cavity to the outer side of the shell, the sliding plate is arranged on the sliding way, two groups of porous plates are arranged on the surface of the sliding plate, the sliding plate divides the flow distribution cavity into an inlet channel and an outlet channel, the pre-tightening device is arranged on the inner wall of the flow distribution cavity in parallel with the sliding plate, a placing cavity is formed in the surface, close to the flow distribution cavity, of the pre-tightening device, and the inside of the placing cavity is provided with the inlet pre-tightening spring. According to the utility model, a certain pretightening force can be applied to the sliding plate through the pretightening spring, so that a good sealing state is kept between the sliding plate and the inner wall of the shunt cavity, material leakage is prevented, and the stability and reliability of the screen changer during working are ensured.

Inventors

• LI FUYONG
• ZHOU XIAOQIANG

Assignees

• 郑州沃华机械有限公司

Dates

Publication Date

20260512

Application Date

20250508

Claims (10)

1. 1. A screen changer having a dead zone reduction reinforcing structure seal ring, comprising: The device comprises a shell, a plurality of grooves and a plurality of guide rails, wherein a flow distribution cavity is formed in the shell, the flow distribution cavity is provided with a slide rail along the vertical direction of a central line, the slide rail penetrates through the inner wall of the flow distribution cavity to the outer side of the shell, and the shell is internally provided with the plurality of grooves; the sliding plate is arranged on the sliding way, two groups of porous plates are arranged on the surface of the sliding plate, and the sliding plate divides the flow distribution cavity into a flow inlet channel and a flow outlet channel; The pre-tightening device is arranged on the inner wall of the shunt cavity in parallel with the sliding plate, a pre-tightening end is arranged on the outer side face of the pre-tightening device, a plurality of inlet pre-tightening springs are arranged on the surface, close to the shell, of the pre-tightening end, the positions of the inlet pre-tightening springs correspond to the placing grooves, and one side, close to the sliding plate, of the pre-tightening device is in sliding connection with the sliding plate.
2. 2. The screen changer of claim 1, wherein the housing comprises an inlet plate, an outlet plate and a gasket strip, the inlet plate and the outlet plate correspond to the inlet channel and the outlet channel respectively, the gasket strip is arranged between the inlet plate and the outlet plate, a feed inlet is formed in the surface of the inlet plate, a discharge outlet is formed in the surface of the outlet plate, and the inlet plate, the outlet plate and the gasket strip are in bolt-fastening connection.
3. 3. The screen changer of claim 2 wherein an inlet melt pressure activation zone is provided between the inlet plate and the pretensioning device.
4. 4. The screen changer of claim 2, wherein an inlet flow dividing frame is arranged on one side of the inlet flow channel far away from the feed inlet, an inlet flow dividing rib is arranged at the center of the radius of one side of the inlet flow dividing frame close to the feed inlet, the inlet flow dividing ribs are radially distributed with the center line of the inlet flow channel as the center, and an inlet flow dividing torpedo head is obliquely connected to one end of the inlet flow dividing rib far away from the inlet flow dividing frame.
5. 5. The screen changer of claim 2, wherein an outlet diversion frame is arranged on one side of the outflow channel far away from the discharge port, an outlet diversion rib is arranged at the center of the radius of one side of the outlet diversion frame close to the discharge port, the outlet diversion ribs are radially distributed with the center line of the outflow channel as the center, an outlet diversion torpedo head is obliquely connected to one end of the outlet diversion rib far away from the outlet diversion frame, an outlet static sealing ring is arranged between one side of the sliding plate far away from the inflow channel and the outlet plate, and the outlet static sealing ring is in sliding connection with the sliding plate.
6. 6. The screen changer according to claim 1, wherein a screen is provided on a side of the perforated plate close to the feed inlet, the screen is connected to the perforated plate by a screen pressing member, a connection end plate is provided on a side of the slide plate away from the inlet plate and the outlet plate, and a receiving groove is provided inside the connection end plate.
7. 7. The screen changer of claim 1, wherein the inlet plate and the outlet plate are connected with stud posts on the sides parallel to the slide plate, a fixing plate is connected to one end of the stud posts far away from the inlet plate and the outlet plate, and through holes are formed in the surface of the fixing plate.
8. 8. The screen changer of claim 7, wherein a cylinder is provided on a side of the fixed plate remote from the inlet plate and the outlet plate, the cylinder being provided with a piston rod, the piston rod being connected to the slide plate through the through hole.
9. 9. The screen changer of claim 6 or 8, wherein a ball head is arranged at one end of the piston rod away from the cylinder, and the ball head is arranged inside the accommodating groove.
10. 10. The screen changer of claim 2 wherein the inlet plate and the outlet plate are internally provided with a heat medium flow passage.

Description

Screen changer with sealing ring with reinforced structure for reducing dead material area Technical Field The utility model relates to the technical field of plastic processing, in particular to a screen changer with a reinforced structure sealing ring for reducing dead material areas. Background In the extrusion processing process of high polymer materials such as plastics, rubber and the like, a screen changer is an indispensable key device, and the main function of the screen changer is to filter impurities, unmelted particles and other foreign matters in a melt, so that the quality and the performance of a final product are ensured. With the rapid development of the polymer material processing industry, the requirements of the market on the precision, purity and production efficiency of products are increasingly increased, which presents a more serious challenge for the performance of the screen changer. The traditional screen changer has a plurality of problems to be solved in practical application. Firstly, internal structure design is unreasonable, forms the dead material district easily. In areas such as a diversion cavity, a sealing part and the like of the screen changer, the material flows smoothly, and part of the material stays for a long time, so that not only is the material wasted, but also impurities are possibly generated due to factors such as high-temperature oxidation and degradation, so that the subsequent material is polluted, and the quality of a product is influenced. Secondly, sealing performance is not enough, and the existing sealing ring is easy to wear and deform under the working environment of high temperature and high pressure, so that melt leakage is caused, material loss is caused, safety accidents can be possibly caused, meanwhile, leaked materials can pollute equipment, and maintenance cost and downtime are increased. In addition, the filter screen replacement operation of the traditional screen changer is complex, the time consumption is long, the production efficiency is low, and the requirement of large-scale continuous production is difficult to meet. Therefore, there is an urgent need for a screen changer having a seal ring with a reinforced structure for reducing dead material area to replace the conventional screen changer, so as to solve the problems of reducing material retention and improving sealability. Disclosure of utility model In view of the above, the utility model provides a screen changer with a reinforcing structure sealing ring for reducing dead material areas, which aims to solve the problems of reducing material retention and improving tightness. The utility model provides a screen changer with a reinforced structure sealing ring for reducing dead material areas, which comprises: The device comprises a shell, a plurality of grooves and a plurality of guide rails, wherein a flow distribution cavity is formed in the shell, the flow distribution cavity is provided with a slide rail along the vertical direction of a central line, the slide rail penetrates through the inner wall of the flow distribution cavity to the outer side of the shell, and the shell is internally provided with the plurality of grooves; the sliding plate is arranged on the sliding way, two groups of porous plates are arranged on the surface of the sliding plate, and the sliding plate divides the flow distribution cavity into a flow inlet channel and a flow outlet channel; The pre-tightening device is arranged on the inner wall of the shunt cavity in parallel with the sliding plate, a pre-tightening end is arranged on the outer side face of the pre-tightening device, a plurality of inlet pre-tightening springs are arranged on the surface, close to the shell, of the pre-tightening end, the positions of the inlet pre-tightening springs correspond to the placing grooves, and one side, close to the sliding plate, of the pre-tightening device is in sliding connection with the sliding plate. Further, the casing includes import board, export board and filler strip, import board and export board correspond with inlet channel and outlet channel respectively, the filler strip sets up between import board and export board, the feed inlet has been seted up on import board surface, the discharge gate has been seted up on export board surface, bolt fastening connects between import board, export board and the filler strip. Further, an inlet melt pressure activation area is arranged between the inlet plate and the pre-tightening device. Further, one side of the inlet channel far away from the feed inlet is provided with an inlet flow distribution frame, the radial center of one side of the inlet flow distribution frame close to the feed inlet is provided with an inlet flow distribution rib, the inlet flow distribution ribs are radially distributed by taking the center line of the inlet channel as the center, and one end of the inlet flow distribution rib far away from the inlet flow distribution