KR102482005B1 - Agitator with enhanced sealing and the sealing unit thereof - Google Patents

Abstract

Disclosed is an agitator with an improved sealing function. The agitator with an improved sealing function according to one embodiment of the present invention comprises: a drive unit disposed at the exterior of the agitation tank; a shaft connected to the drive unit, rotated by receiving a rotary force, and disposed vertically at the interior of the agitation tank; a support unit installed at an inlet of the agitation tank and sealing the agitation tank, including a through-hole through which the shaft can pass, and rotationally supporting the shaft inserted into the through-hole; and a sealing unit sealing between the through-hole of the support unit and the shaft. According to the agitator and a sealing unit used therefor, a sealing force can be maintained.

Description

Agitator with improved sealing function and sealing unit used therein {AGITATOR WITH ENHANCED SEALING AND THE SEALING UNIT THEREOF}

The present invention relates to a mixer for chemical experiments, an agitator, and a sealing unit used therefor, and relates to an agitator having an improved sealing function capable of preventing leakage of fluid in the agitator even when the rotating shaft of the agitator operates, and a sealing unit used therefor.

In general, agitators are used for product homogenization, precipitation prevention, reaction, fermentation, etc. in the chemical industry. In general, an agitator stirs a material to be stirred by rotating it using an impeller or a stirring blade. In this process, friction occurs between the rotating shaft and the support, and when the sealing performance of the stirring tank in which the stirring material is accommodated is deteriorated, foreign substances are introduced and the stirring efficiency is lowered, or the driving equipment is broken as the stirring material flows into the driving unit. There is a problem with this occurring.

Korea Registered Utility Model 20-0445857 (2009.09.08)

An object of an embodiment of the present invention is to provide a stirrer capable of maintaining sealing force between a rotating shaft and a support even when used for a long time, and a sealing unit used therefor.

In addition, it is to provide an agitator capable of preventing corrosion of a shaft and increasing durability of a sealing part and a sealing unit used therefor.

In addition, to provide an agitator capable of effectively cooling or dissipating heat generated by friction between a shaft and a support and a sealing unit used therefor.

In addition, to provide an agitator capable of minimizing vibration of the shaft, preventing external foreign substances from entering the inside of the stirring tank, and preventing leakage of fluid inside the stirring tank to the outside, and a sealing unit used therefor .

The tasks to be solved in the embodiments are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

An agitator with improved sealing function according to an embodiment of the present invention includes a driving unit disposed outside the stirring tank; a shaft connected to the drive unit, rotated by receiving rotational force, and disposed vertically inside the stirring tank; a support portion installed at an inlet of the stirring vessel to seal the stirring vessel, including a through-hole through which the shaft passes, and rotatably supporting the shaft inserted into the through-hole; and a sealing part sealing between the through hole of the support part and the shaft.

In addition, the sealing unit, one or more airtight seals for maintaining the airtightness of the stirring tank; and one or more elastic seals supporting the shaft and suppressing vibration, wherein the airtight seal and the elastic seal are formed of a plastic material, and the elastic seal may have greater elasticity than the airtight seal.

In addition, the airtight seal is a lip seal in which a curved lip is formed on an inner periphery of an annular seal, and an elastic member may be inserted into the seal body of the elastic seal.

In addition, an annular anti-rotation member may be provided on outer circumferential surfaces of the hermetic seal and the elastic seal facing the support portion.

In addition, the airtight seal and the elastic seal are disposed adjacent to each other in series, and the airtight seal may be disposed above the elastic seal in the stirring tank.

In addition, a lower part of the shaft contacting the fluid stored in the stirring tank may be coated with an anti-corrosion member.

In addition, an annular reinforcing member provided around the shaft may be further included in an area of the shaft corresponding to the sealing part.

In addition, the reinforcing member may be made of silicon carbide, carbon, cemented carbide, ceramic material or plated material.

In addition, a lower portion of the shaft contacting the fluid stored in the stirring tank may be coated with a corrosion preventing member, and the corrosion preventing member may cover a portion of the lower portion of the reinforcing member.

In addition, the support portion may include a support body portion for sealing the inlet of the stirring vessel; and a sidewall sealing member provided around the support body to seal between the support body and the sidewall of the stirring tank.

In addition, the support body portion may include a metal material therein to increase strength.

In addition, a bearing for rotatably supporting the shaft within the support may be further included.

Also, the support part may include a cooling water jacket provided around the sealing part to cool the sealing part.

In addition, the support part may include a heat dissipation fin provided thereon to cool the sealing part.

According to an embodiment of the present invention, the sealing unit used in the agitator is installed at the inlet of the stirring tank of the agitator to seal the stirring tank, includes a through hole through which a shaft can pass, and is inserted into the through hole a support portion rotatably supporting the shaft; and a sealing part sealing between the through hole of the support part and the shaft.

In addition, the sealing unit, one or more airtight seals for maintaining the airtightness of the stirring tank; and one or more elastic seals supporting the shaft and suppressing vibration, wherein the airtight seal and the elastic seal are formed of a plastic material, and the elastic seal may have greater elasticity than the airtight seal.

In addition, the support portion may include a support body portion for sealing the inlet of the stirring vessel; and a sidewall sealing member provided around the support body to seal between the support body and the sidewall of the stirring tank.

In addition, the support body portion may include a metal material therein to increase strength.

According to the sealing unit used in the agitator according to an embodiment of the present invention, the sealing unit makes linear contact with the shaft, thereby minimizing the frictional force, so that a separate supply of lubricating oil is not required, which makes the structure very simple and simple, while maintaining the sealing force. can improve

In addition, by providing a chemical-resistant reinforcing member with high hardness to the shaft to prevent corrosion of the shaft and to make the reinforcing member contact the sealing part, wear of the sealing part can be reduced and protected.

In addition, since heat generated by friction between the shaft and the support part can be effectively cooled or dissipated, the life of the sealing part can be extended by keeping the temperature of the sealing part low.

In addition, it is possible to minimize vibration of the shaft, prevent external foreign substances from being introduced into the stirring tank, and prevent fluid inside the stirring tank from leaking to the outside.

1 is a view showing an agitator according to an embodiment of the present invention.
2 is a view schematically showing the structure of a sealing unit according to an embodiment of the present invention.
3 is a view schematically showing the structure of a sealing unit according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the embodiment of the present invention in the drawings, parts irrelevant to the description are omitted.

Terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as "include", "have" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one Or it may be understood that it does not exclude in advance the possibility of the existence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

In addition, the following embodiments are provided to more clearly explain to those with average knowledge in the art, and the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings.

1 is a view showing an agitator according to an embodiment of the present invention, and FIG. 2 is a view schematically showing the structure of a sealing unit according to an embodiment of the present invention.

3 is a view schematically showing the structure of a sealing unit according to another embodiment of the present invention.

First, referring to FIGS. 1 and 2, the agitator 100 with improved sealing function according to an embodiment of the present invention includes a stirring tank 110, a driving unit 180 disposed outside the stirring tank 110, and It may include a shaft 120 rotatably installed inside the jaw 110 , a support 160 rotatably supporting the shaft 120 , and a sealing unit 140 .

The driving unit 180 may be provided as a motor or the like, and may be connected to one end of the shaft 120 to rotate the shaft 120 . The shaft 120 has an elongated shape and may be inserted into the stirring tank 110 and disposed vertically within the stirring tank 110 . One end of the shaft 120 is provided with stirring blades 124 or impellers to stir the fluid stored in the stirring tank 110 . To this end, the shaft 120 may have one end connected to the drive unit 180 to receive rotational force and rotate.

The support part 160 serves to rotatably support the shaft 120 in the stirring tank 110, and is installed at the inlet 112 of the stirring tank 110 to move the stirring tank 110 through the inlet 112. It can play a sealing role. The support part 160 is provided with a through hole 165 through which the shaft 120 can pass through, and the shaft 120 can be inserted into the stirring tank 110 through the through hole 165 . For example, the material of the shaft 120 may be stainless steel (SUS).

The sealing part 140 is for sealing between the through hole 165 of the support part 160 and the shaft 120, and while the shaft 120 rotates in the through hole 165, the through hole 165 and It is possible to prevent the fluid inside the stirring tank 110 from leaking to the outside between the shafts 120 .

Referring to FIG. 2 , the sealing unit 140 may include an airtight seal 142 and an elastic seal 146 . One or more airtight seals 142 may be provided to maintain airtightness of the stirring tank 110 . One or more elastic seals 146 may be used to support the shaft 120 and suppress vibration. In this embodiment, the hermetic seal 142 and the elastic seal 146 are formed of a plastic material, and the elastic seal 146 may have greater elasticity than the hermetic seal 142 . For example, the elastic seal 146 may have greater elasticity than the hermetic seal 142, and may be twice or more.

The hermetic seal 142 is a lip seal made of plastic having a curved lip formed on the inner periphery of the annular seal, and as shown in FIG. It has a curved shape toward the B region so as not to be discharged to the B area.

The elastic seal 146 serves to support the shaft 120 together with the bearing 130 so that the axis 121 is not changed by vibration or the like while the shaft 120 rotates and is kept constant. On the other hand, when the axis 121 is fluctuated, a gap between the shaft 120 and the sealing seal 142 may be widened, causing a problem that foreign substances may be introduced therebetween. In this embodiment, even if the axis line 121 fluctuates, since the elastic seal 146 is provided, it is possible to block foreign substances introduced between the shaft 120 and the sealing seal 142 from entering the area B. It is possible to prevent the fluid in area B from leaking into area A. The elastic seal 146 includes a plastic seal body 146a having a recess formed in one direction, and an elastic member that is accommodated inside the seal body 146a and can press the seal body 146a toward the shaft 120 ( 146b). The elastic member 146b may be, for example, an O-ring, a square ring, or a metal spring, but is not limited thereto.

The airtight seal 142 and the elastic seal 146 are disposed adjacent to each other in series in the direction of the axis 121, the airtight seal 142 may be disposed above the stirring tank 110 than the elastic seal 146 . The airtight seal 142 and the elastic seal 146 are provided in plurality, respectively, and even if one of the airtight seal 142 or the elastic seal 146 is damaged, its function can be maintained.

In addition, the support portion 160 of the hermetic seal 142 and the elastic seal 146 is installed to prevent the hermetic seal 142 and the elastic seal 146 from rotating relative to the support portion 160 within the support portion 160. An annular anti-rotation member 148 may be provided on the outer circumferential surface facing. The anti-rotation member 148 serves to further press the hermetic seal 142 and the elastic seal 146 toward the shaft 120. In addition, compared to when there is no anti-rotation member 148, that is, when the hermetic seal 142 and the elastic seal 146 directly come into contact with the inner circumferential surface of the support body portion 162, the anti-rotation member 148, The frictional force between the hermetic seal 142 and the elastic seal 146 is large. Accordingly, it is possible to prevent the hermetic seal 142 and the elastic seal 146 from rotating relative to the support 160 within the support 160 .

In addition, when disassembling and assembling for reasons such as damage and inspection, even if the surface roughness of the support body portion 160 is relatively rough, during the disassembly and assembly process, the anti-rotation member 148 rubs against the inner circumferential surface of the support body portion 160. Therefore, the sealing part 140 can minimize damage due to the low surface roughness of the support body part 160 . In addition, since the anti-rotation member 148 has the advantage of being reusable even if it is damaged to some extent, it can be more easily disassembled and assembled.

Referring back to FIG. 1 , a lower portion of the shaft 120 contacting the fluid stored in the stirring tank 110 may be coated with a corrosion protection member 122 . In this embodiment, the anti-corrosion member 122 may be made of polytetrafluoroethylene (PTFE), including Teflon.

Meanwhile, an annular reinforcing member 126 may be provided along the circumference of the shaft 120 in an area of the shaft 120 corresponding to the sealing portion 140 . In this embodiment, the reinforcing member 126 is preferably made of a chemical-resistant material, for example, it may be made of silicon carbide (SiC) material, and in addition, it is made of carbon, cemented carbide, ceramic material, or plated material. It can be.

Since the reinforcing member 126 has chemical resistance, corrosion can be prevented, and since the hardness is stronger than the shaft 120 made of SUS, friction with the sealing part 140 can be reduced, so that the shaft 120 made of SUS Compared to the case where the sealing part 140 and the sealing part 140 directly contact each other, wear between the sealing part 140 and the shaft 120 can be reduced, thereby protecting the sealing part 140 .

In addition, the anti-corrosion member 122 may cover a lower part of the reinforcing member 126 to prevent the fluid in the stirring tank from directly contacting the reinforcing member 126 and being corroded.

Meanwhile, the support part 160 may include a support body part 162 sealing the inlet 112 of the stirring tank 110 and a side wall sealing member 164 . The sidewall sealing member 164 is for sealing between the support body 162 and the sidewall of the stirring tank 110 and may be provided around the support body 162 in the form of an O-ring. The material of the support body portion 162 may be provided with, for example, polytetrafluoroethylene (PTFE) including Teflon. Accordingly, even if the inlet 112 of the stirring tank 110 is made of a brittle material such as glass, since the support body 162 is made of Teflon, it is possible to prevent mutual damage upon contact with the glass. On the other hand, in this embodiment, when the outer shape of the support body portion 162 is formed of a Teflon material, the support body portion 162 may include a reinforcing portion 163 made of a metal material therein to increase overall strength. .

In this embodiment, the support part 160 may include a cooling water jacket 166 provided around the sealing part 140 to cool the sealing part 140 and a heat dissipation fin 168 provided above the support part 160. there is. Through this, when the shaft 120 rotates at a high speed, heat generated due to friction between the support part 160 and the sealing part 140 can be cooled or effectively released.

Meanwhile, the stirrer 110 according to the present embodiment may further include a bearing 130 to stably and rotatably support the shaft 120 within the support 160 even when the shaft 120 rotates at a high speed. can However, depending on the embodiment, when the shaft 120 does not require high-speed rotation, the bearing 130 may not be provided.

Although the above embodiment has been described with respect to the stirrer, it can also be applied to the mixer for chemical experiments, and in the present specification, the stirrer is a concept including the mixer for chemical experiments.

According to the stirrer and the sealing unit used therein according to the above-described embodiment, the sealing unit makes linear contact with the shaft, thereby minimizing the frictional force, so that a separate supply of lubricating oil is not required, which makes the structure very simple and simple, while maintaining the sealing force. can improve

In addition, by providing a chemical-resistant reinforcing member with high hardness to the shaft to prevent corrosion of the shaft and to make the reinforcing member contact the sealing part, wear of the sealing part can be reduced and protected.

In addition, since heat generated by friction between the shaft and the support part can be effectively cooled or dissipated, the life of the sealing part can be extended by keeping the temperature of the sealing part low.

In addition, it is possible to minimize vibration of the shaft, prevent external foreign substances from being introduced into the stirring tank, and prevent fluid inside the stirring tank from leaking to the outside.

In the above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments, Those skilled in the art to which the present invention pertains may seek various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments and should not be determined, and not only the claims to be described later, but also all modifications equivalent or equivalent to these claims fall within the scope of the spirit of the present invention. will do it

100: agitator 110: agitator
112: agitation tank inlet 120: shaft
122: anti-corrosion member 126: reinforcing member
130: bearing 140: sealing part
142: hermetic seal 146: elastic seal
148: anti-rotation member 160: support
162: support body part 163: reinforcement part
164: side wall sealing member 165: through hole
166: cooling water jacket 168: radiation fin

Claims (18)

a driving unit disposed outside the stirring tank;
a shaft connected to the drive unit, rotated by receiving rotational force, and disposed vertically inside the stirring tank;
a support portion installed at an inlet of the stirring vessel to seal the stirring vessel, including a through-hole through which the shaft passes, and rotatably supporting the shaft inserted into the through-hole; and
And a sealing part sealing between the through hole of the support part and the shaft,
The support part includes a support body part for sealing the inlet of the stirring tank, and a side wall sealing member provided around the support body part to seal between the support body part and the side wall of the stirring tank,
The support body part is formed of a Teflon material, and includes a reinforcing part formed of a metal material for increasing strength therein,
The sealing part,
one or more airtight seals for maintaining airtightness of the stirring vessel; and
Including; one or more elastic seals for supporting the shaft and suppressing vibration;
The hermetic seal and the elastic seal are formed of a plastic material, and the elastic seal has greater elasticity than the hermetic seal,
Agitator with improved sealing function, wherein an annular anti-rotation member is provided on the outer circumferential surface of the hermetic seal and the elastic seal toward the support.
delete According to claim 1,
The hermetic seal is a lip seal in which a curved lip is formed on the inner periphery of the annular seal,
The elastic seal is an agitator with improved sealing function in which an elastic member is inserted into the seal body.
delete According to claim 1,
The hermetic seal and the elastic seal are disposed adjacent to each other in series,
The airtight seal is an agitator with improved sealing function that is disposed above the stirring tank than the elastic seal.
According to claim 1,
The lower part of the shaft in contact with the fluid stored in the stirring tank is coated with an anti-corrosion member.
According to claim 1,
The stirrer further comprises an annular reinforcing member provided around the shaft in an area of the shaft corresponding to the sealing part.
According to claim 7,
The reinforcing member is a stirrer with improved sealing function that is provided with silicon carbide, carbon, carbide, ceramic material or plated material.
According to claim 7,
The lower part of the shaft in contact with the fluid stored in the stirring tank is coated with an anti-corrosion member,
The anti-corrosion member is a stirrer with improved sealing function that covers a lower portion of the reinforcing member.
delete delete According to claim 1,
Agitator with improved sealing function further comprising a bearing for rotatably supporting the shaft in the support.
According to claim 1,
The support part includes a cooling water jacket provided around the sealing part to cool the sealing part.
According to claim 1,
The support part includes a heat radiation fin provided thereon to cool the sealing part.
As a sealing unit used in the agitator,
a support part installed at an inlet of the stirring tank of the stirrer to seal the stirring tank, including a through hole through which a shaft may pass, and rotatably supporting the shaft inserted into the through hole; and
And a sealing part sealing between the through hole of the support part and the shaft,
The support part includes a support body part for sealing the inlet of the stirring tank, and a side wall sealing member provided around the support body part to seal between the support body part and the side wall of the stirring tank,
The support body part is formed of a Teflon material, and includes a reinforcing part formed of a metal material for increasing strength therein,
The sealing part,
one or more airtight seals for maintaining airtightness of the stirring vessel; and
Including; one or more elastic seals for supporting the shaft and suppressing vibration;
The hermetic seal and the elastic seal are formed of a plastic material, and the elastic seal has greater elasticity than the hermetic seal,
Sealing unit used in the stirrer to which an annular anti-rotation member is provided on the outer circumferential surface of the airtight seal and the elastic seal toward the support.
delete delete delete

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