TWM500613U - Rotary die head filtering device capable of being backwashed - Google Patents

Description

Rotary backwashing die filter

The novel type belongs to the field of plastic extrusion equipment, and particularly relates to a rotary backwashing die filtering device capable of automatically performing backwashing of the filter by detecting pressure.

According to the plastic granulation extrusion molding process, since the raw material stream which is melted into a liquid, including new materials or recycled materials, is mixed with impurities, it must be removed by filtration.

However, according to practical experience, in the current filtration operation, after the filter is used for a period of time, it is easy to block due to accumulated impurities, and the pressure loss must be stopped to replace the filter before the filter operation can be continued, as shown in the fourth figure. As shown, it is the most common die filtering structure at present, which is replaced when the filter is blocked, and frequent replacement causes a large consumption of the filter material.

In order to solve the above problems, the creator of this case has developed a new patent case of the Republic of China No. M360739 "Automatic Backwashing Device for Plastic Rubber Machinery", which can achieve the function of backwashing the filter. The front piece of the head and the corresponding back piece of the die have more than one feeding flow channel in the front piece of the die, and more than one discharging flow channel is arranged corresponding to the feeding flow channel in the back piece of the die; At least one impurity discharge flow channel is disposed beside the feed passage of the front piece of the die; a filter bracket is disposed between the feed flow path and the continuous discharge flow path, and a corresponding flow channel is filled The above filter screen has more than one through-channel corresponding to the discharge flow channel at the bottom; the filter mesh bracket is connected by a telescopic arm of a telescopic cylinder; and a pressure sensing circuit generates a block in the filter mesh. When the filter tray is moved, the filtering operation of the partial filter is reserved, and part of the filter moves to make a discharge flow channel communicate with the impurity discharge flow channel mentioned above, and the filtration continues and the partial recovery material is pressed. Pushing the reverse rinsing filter to remove impurities from the impurities Discharge the discharge channel; achieve the purpose of no pressure loss, no downtime maintenance and extended filter life.

The creators of this case have developed the "Rotary Backwashing Die Filtering Device" in this case with the long-term experience of accumulating relevant products, and confirmed that it can effectively achieve the established practical efficacy targets after field trial verification. Sincerely is an ideal creation.

The new content of this case is how to provide a plastic extrusion equipment that can reduce downtime for filter replacement and improve work efficiency.

The present invention provides a rotary backwashing die filtering device, comprising: a space provided in the body, and at least one inlet opening, one discharging opening, and a row of sewage ports are connected thereto; a rotatable screen carrier; the screen carrier carries more than one filter screen, such that it has a filter screen corresponding to the inlet port, and another filter screen corresponding to the sewage outlet; After the impurities are passed, the raw material flow is increased by the pressure. When the pressure reaches the preset value, the filter carrier is rotated, and the other filter mesh is moved to correspond to the inlet, so that the raw material flow is smooth; After the carrier is rotated several times, when the respective filter screens are caused by impurity blockage and the total pressure accumulation reaches a preset value, the raw material flow is changed to flow through the sewage outlet, and the filter corresponding to the sewage outlet is backwashed. Discharge; thereby reducing the number of times the screen is replaced and reducing the filter consumption and increasing production efficiency.

Further, it is pointed out that a backwash valve is arranged in the sewage outlet, and a material blocking valve is arranged in the discharging port; when each filter meshes due to impurity blockage, the pressure accumulation reaches a preset value, and the opening will be started. The backwash valve simultaneously closes the material blocking valve, and the raw material flow is redirected through the sewage outlet to reversely flush the filter screen corresponding to the sewage outlet.

It is further noted that the screen carrier is controlled to be rotated by an external power source or a manual transmission.

1‧‧‧ Ontology

11‧‧‧Inlet

12‧‧‧Outlet

13‧‧‧ Space

14‧‧‧Sewage outlet

15‧‧‧Backwash valve

16‧‧‧Resistance valve

2‧‧‧Filter vector

21‧‧‧ Filter

The first figure is a stereoscopic appearance of the preferred embodiment of the present invention.

The second drawing is a structural sectional view of the preferred embodiment of the present invention.

The third figure is a schematic diagram of the application combination of the preferred embodiment of the present creation

The fourth figure is a schematic diagram of the conventional structure

The invention relates to a rotary backwashing die filtering device. The body (1) of the die comprises: at least one inlet (11); at least one outlet (12); and a space (1) is provided in the body (1) 13); the inlet port (11) and the outlet (12) are in communication with the space (13); a drain (14) is provided in the space (13) of the body (1); Included is a rotatable screen carrier (2); the screen carrier (2) carries more than one filter (21), so that it maintains a filter corresponding to the inlet (11); Another filter screen corresponds to the sewage outlet (14), and is equipped with a backwash valve (15); and a discharge valve (16) is provided at the discharge port (12); the sieve carrier (2) The controlled rotation of the external power source or the manual transmission; the first drawing is a perspective view of the preferred embodiment of the present invention, and the second drawing is a structural combination sectional view of the preferred embodiment of the present invention, and the third drawing is According to the above-mentioned structural composition, the present invention utilizes the pressure detection side to perform automatic backwashing of the filter screen, and the actuation mode thereof is described as follows: the raw material flow is from the inlet of the body (1) (11) Entering, filtering impurities through the corresponding filter (21), and then outputting from the discharge port (12); filtering the impurities under the filter (21) will increase the pressure of the raw material through the pressure, when the pressure reaches a preset value , that is, the filter carrier (2) is rotated, and the other filter (21) is moved. To correspond to the feed port (11), in this way, the raw material flow is smooth; and when the filter carrier (2) is rotated several times, the respective filter (21) carried by the filter is blocked by impurities. When the total pressure accumulation reaches the preset value, the backwash valve (15) of the sewage outlet (14) is opened, and the material blocking valve (16) of the discharge port (12) is closed, so that the raw material flow is changed. a sewage outlet (14), and reverse-washing (relative to the flow direction of the feed) corresponding to the screen (21) of the sewage outlet (14), rinsing the impurities on the screen (21) and discharging; When the number of flushing increases, it means that the filter (21) has been completely blocked before it is replaced.

It can be found from the above act of creation that this creation has the following characteristics:

(A) Since the filter can be backwashed, it can extend its service life and save the filter.

(B) Since the filter can be replaced after a long period of time, it can be used for a long time without stopping the machine and improving production efficiency.

All of the above are only examples of the present invention. When it is not possible to limit the scope of the creation of the creation, that is, the simple equivalent changes, modifications and replacements made by the scope of the patent application and the content of the creation specification are all It should be within the scope of this creation patent.

1‧‧‧ Ontology

11‧‧‧Inlet

12‧‧‧Outlet

13‧‧‧ Space

14‧‧‧Sewage outlet

15‧‧‧Backwash valve

2‧‧‧Filter vector

21‧‧‧ Filter

Claims (5)

The rotary backwashing head filter device comprises: at least one inlet port; at least one sewage outlet; a space provided in the body; the inlet port and the sewage outlet are connected to the space; A rotatable screen carrier is mounted; the screen carrier carries more than one screen so that it maintains a screen corresponding to the inlet, and another screen corresponds to the outlet. The rotary backwashing head filter device according to claim 1, wherein the drain outlet is provided with a backwash valve. The rotary backwashing head filter device according to claim 1, wherein the body is provided with at least one discharge port communicating with the space. The rotary backwashing head filter device according to claim 3, wherein the discharge port is provided with a material blocking valve. The rotary backwashing head filter device of claim 1, wherein the screen carrier is driven by an external power source.