JPH0633999U - Foreign matter removal device for press part of paper machine - Google Patents

Abstract

(57) [Summary] [Purpose] A foreign matter adhering to the surface of the thermal spray roll can be removed without using a blade without contact, maintenance of the blade is unnecessary, and running costs can be reduced. Another object is to provide a foreign matter removing device. A foreign matter removing device for a paper machine press part according to the present invention comprises a jet nozzle 7 for injecting jet air toward the thermal spray roll 3 in the paper machine press part 1 in which a paper 6 is pressurized and dehydrated by a thermal spray roll 3. And a suction nozzle 8 for sucking the foreign matter removed by jet air is provided downstream thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foreign matter removing device for a press part of a paper machine, which is capable of removing foreign matter such as paper powder and dust adhering to a thermal spraying roll in a non-contact manner.

[0002]

[Prior art]

 Generally, a paper machine is equipped with a press part that pressurizes and dehydrates paper containing a large amount of water immediately after papermaking between rolls. Since foreign substances such as paper dust and dust adhere to the surface of the roll of this press part, a blade (also called a doctor blade) is provided near the roll to scrape and remove foreign matter by sliding contact with the surface of the roll. Has been.

By the way, a natural stone roll has been conventionally used as the roll, but nowadays, a thermal spray roll formed by forming a porous layer on the surface of the roll by plasma spraying has been widely used.

[0004]

[Problems to be solved by the device]

 However, compared to natural stone rolls, sprayed rolls tend to wear the blades due to their poor water retention, which makes maintenance of the blades difficult and causes a high running cost.

Therefore, the object of the present invention is to remove foreign matter adhering to the surface of the thermal spraying roll without using a blade, without the need for blade maintenance, and to reduce the running cost. It is to provide a foreign matter removing device for a machine press part.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the foreign matter removing device of the paper machine press part according to the present invention is a jet machine that jets jet air toward the above spray roll in a paper machine press part that pressurizes and dewaters paper with a spray roll. The feature is that a nozzle is provided and a suction nozzle that sucks in foreign matter removed by jet air is provided downstream of the nozzle.

[0007]

[Action]

 Foreign matter adhering to the surface of the thermal spray roll is first removed by jet air jetted from a jet nozzle, and then sucked (recovered) by a suction nozzle downstream. In this way, the foreign matter adhering to the surface of the thermal spray roll can be removed in a non-contact manner without using a blade, so that maintenance of the blade becomes unnecessary and running cost can be reduced. Further, since the foreign matter can be collected, the foreign matter is prevented from scattering and adhering to the paper.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a press part of a paper machine, which includes a rubber roll 2 and a thermal spraying roll 3 pressed onto the rubber roll 2 in a rotatable manner. A felt 4 is inserted between these rolls 2 and 3 via a guide roll 5, and a paper 6 immediately after the paper making is placed on the upper surface of the felt 4.

Above the thermal spraying roll 3, the jet air is directed to the surface of the thermal spraying roll 3 so as to face the rotation direction of the thermal spraying roll 3 in order to remove foreign matter such as paper powder and dust. A jet nozzle 7 for injecting the foreign matter is provided, and a suction nozzle 8 for sucking foreign matter removed by an air jet is provided downstream thereof (downstream of the jet air). The jet nozzle 7 is connected to a discharge side of a blower (turbo blower) 10 via a compressed air supply line 9, and the suction nozzle 8 is connected to a suction side of the blower 10 via a suction line 11. Further, the suction line 11 is provided with a separator 12 for separating the sucked foreign matter.

According to this structure, jet air is jetted from the jet nozzle 7 by driving the blower 10, and a suction flow is generated in the suction nozzle 8. The foreign matter adhering to the surface of the thermal spraying roll 3 is first removed by the jet air jetted from the jet nozzle 7, and then sucked by the suction nozzle 8 located downstream. The sucked foreign matter is separated from the sucked air flow by the separator 12 and collected.

Since the jet nozzle 7 for injecting jet air toward the thermal spraying roll 3 is provided in this manner, foreign matter adhering to the surface of the thermal spraying roll 3 can be easily removed in a non-contact manner without using a blade. This eliminates the need for blade maintenance and reduces the running cost. Further, since the suction nozzle 8 for sucking the foreign matter removed by the jet air is provided downstream of the jet nozzle 7, the foreign matter can be collected and the foreign matter can be prevented from scattering and adhering to the paper. . Further, since the suction nozzle 8 and the jet nozzle 7 are connected via the suction line 11, the blower 10 and the compressed air supply line 9, only one drive source is required for these suction nozzle 8 and jet nozzle 7, and the structure is simplified. And the cost can be reduced.

[0013]

[Effect of device]

 In summary, according to the present invention, since the jet nozzle for injecting jet air toward the spraying roll is provided, the foreign matter adhering to the surface of the spraying roll can be removed in a non-contact manner without using a blade. Maintenance is not required and running costs can be reduced. Further, since the suction nozzle for sucking the foreign matter removed by the jet air is provided downstream of the jet nozzle, the foreign matter can be collected, and the foreign matter can be prevented from scattering and adhering to the paper.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Press part 3 Thermal spray roll 6 Paper 7 Jet nozzle 8 Suction nozzle

Claims (1)

[Scope of utility model registration request] 1. A paper machine press part for pressurizing and dewatering paper with a spraying roll, wherein a jet nozzle for injecting jet air toward the spraying roll is provided, and foreign matter removed by jet air is sucked downstream thereof. A foreign matter removing device for a press part of a paper machine, which is provided with a suction nozzle.