KR101828944B1 - Chemicals Storage Tank - Google Patents

Abstract

The present invention relates to a chemical storage tank which has high durability and is resistant to impact when being used for a chemical reservoir in the chemical industry, a stirring vessel, or a waste chemical processing tank, and can be protected from expanding and contracting by chemicals stored therein. The chemical storage tank which has a cylinder shape having a closed lower surface and tapered upward, and having a lid formed at an end of the upper portion thereof to be opened or closed comprises: a first container storing chemicals and made of a polyethylene (PE) resin; and a second container accommodating the first container and made of engineering plastic. The second container is integrated with the first container at a lower surface and an upper portion thereof, and is separated from the first container around the first container. The second container includes a plurality of through holes formed in a circumferential direction thereof to reduce heat from the chemicals stored in the first container. The through holes have inner diameters tapered upward from a lower surface. A plurality of ribs are provided between the plurality of through holes. The rib provided in the center of the second container is larger than ribs provided at upper and lower portions of the second container. Therefore, the chemical storage tank can prevent damage to a storage tank caused by expansion and contraction of chemicals.

Description

[0001] The present invention relates to a chemical storage tank,

The present invention relates to a storage tank for a chemical agent, and particularly to a chemical tank for a chemical industry, a stirring tank, a wastewater treatment tank, and the like, and is capable of protecting a storage tank which expands and contracts by chemicals stored therein, To a storage tank for a chemical.

In general, chemicals are widely used throughout the industry, from chemicals for surface treatment to semiconductor production, which are indispensably used not only in chemical industry but also in various production sites.

Chemical substances such as sulfuric acid or hydrochloric acid corresponding to industrial materials are dangerous when they come into contact with human body. They are corrosive to metals and should be stored in a container having chemical resistance. Such chemicals are supplied in containers And the supply line. Chemicals such as nitric acid or fluoride also need to be managed and handled in a similar way.

In addition, most of the chemical characteristics are characterized by high specific gravity compared with water, and these high specific gravity are characterized by a large expansion and contraction depending on temperature. Therefore, the tank for storing such a chemical is mostly made of synthetic resin. In order to prevent the tank from being damaged due to the expansion of the chemical, the tank is wrapped around the guide bracket made of iron so as to suppress the expansion of the tank .

One example of such a technique is described in documents 1 to 3 below.

For example, as shown in Fig. 1, the following Patent Literature 1 has a structure in which two plates having a semicircular plate shape bent to have an inner circumferential surface corresponding to the outer circumferential surface of a chemical storage tank having a cylindrical shape are mutually coupled, A plurality of bolt holes 24 are formed in the tank 1 so as to surround the tank 1 and have mutually adjacent surfaces extending in the normal direction to form a plurality of coupling holes 21 arranged in the vertical direction, Wherein the guide bracket is formed with a plurality of through-holes (23) penetrating therethrough at regular intervals in the vertical and horizontal directions, and the guide bracket (2) And a coating layer including the inner circumferential surface of the through hole is formed on the surface of the guide bracket 2 for the chemical storage tank.

Also, in Patent Document 2, there is a cylindrical chemical storage tank in which a bottom is clogged, an upper portion is gradually narrowed and a lid is mounted at the end thereof, and in a side wall having the same arc except for the bottom surface and the upper portion of the storage tank A plurality of through holes are arranged in a lattice shape on the steel plate and the inner wall surface and the outer wall surface are connected to each other by synthetic resin having the same material passing through the through holes For chemical storage tanks.

Patent Document 3 discloses a chemical container having a temperature control jacket capable of storing a chemical substance and discharging the chemical substance through a transfer path. The chemical container includes a storage container made of polyethylene or polypropylene, A temperature regulating jacket having an inlet unit and an outlet unit arranged to receive a temperature regulating material such as water between the outlet and the temperature regulating jacket, A lower portion and a base plate to which the discharge socket is fixed.

Korean Registered Patent No. 10-1068970 (registered on September 23, 2011) Korean Registered Patent No. 10-1116788 (registered on Mar. 02, 2012) Korean Patent Laid-Open Publication No. 2015-0116425 (published on October 15, 2015)

Patent Document 1 is filed and registered by the applicant of the present invention. In order to prevent the tank from being damaged due to the expansion of the chemical, the tank for storing the chemical is generally made of synthetic resin, Since the bracket-wrapping structure is applied, it is necessary to add a process for fastening the bolt and nut and coat the guide bracket. Therefore, in the technique disclosed in Patent Document 1, a worker wears a guide bracket for each storage tank and coating the guide bracket has a problem of not only an increase in manufacturing cost but also a long manufacturing time.

Patent Document 2 discloses a structure in which a cylindrical iron plate having a predetermined thickness is inserted into a sidewall and the inner wall surface and the outer wall surface are connected by synthetic resin of the same material passing through the through hole, When the process of expanding and contracting the chemical is repeated, there is a problem that the inner wall surface and the outer wall surface are separated from the steel plate, and the container itself is damaged.

Also, the technology disclosed in Patent Document 3 has a structure in which a temperature control jacket is disposed between the peripheral walls of the storage container to accommodate the temperature control material such as water, when the storage container is mounted outdoors, There is a problem that the cost for temperature control is increased and the control for this is cumbersome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a storage tank for a chemical agent which can easily mount a storage tank by integrally manufacturing a first container and a second container.

Another object of the present invention is to provide a storage tank for a chemical agent which can prevent breakage of the storage tank without temperature control due to the expansion and contraction of the chemical substance.

It is still another object of the present invention to provide a storage tank for a chemical agent which eliminates the need for mounting a guide bracket and thus eliminates the coating operation.

In order to achieve the above object, a storage tank for a chemical agent according to the present invention is a cylindrical chemical storage tank in which a bottom surface is closed, an upper portion is gradually narrowed, and a lid is openably and closably mounted on an upper end, A first container made of polyethylene (PE) resin and a second container made of engineering plastic containing the first container, the second container being integrally formed with the first container at the bottom and the top, And a plurality of through holes are formed in the second container in a circumferential direction so as to reduce heat generated from the chemical substance stored in the first container, Wherein a plurality of ribs are provided between the plurality of through holes, and a rib provided at a central portion of the second container is formed with a plurality of through- And ribs provided on the lower portion and the lower portion.

In the storage tank for a chemical according to the present invention, aramid fiber, glass fiber or carbon fiber is contained as the reinforcing fiber in the engineering plastic, and the reinforcing fiber is 10 to 25 By weight.

In the storage tank for a chemical agent according to the present invention, an opening for removing impurities deposited between the first container and the second container is provided at a peripheral portion of the bottom surface of the second container.

As described above, according to the chemical storage tank of the present invention, since the first container and the second container having high strength for preventing breakage of the first container due to the expansion of the first container are integrally formed, An additional process for mounting the guide bracket to the storage tank, such as the technique of FIG.

In addition, according to the storage tank for a chemical agent according to the present invention, by providing a plurality of through holes in the second container, it is possible to prevent the storage tank from being damaged without temperature control due to the expansion and contraction of chemical substances stored in the first container can do. That is, in the second container, a plurality of through holes are formed in the circumferential direction so as to reduce the heat generated from the chemical stored in the first container. Since the through holes are formed to have a smaller inner diameter from the bottom to the top, The convection phenomenon of the air flowing from the through hole to the upper through hole causes a diverging action to the first container to reduce the heat generated by the chemical stored in the first container, The usage amount can be reduced.

Further, according to the chemical storage tank of the present invention, the strength of the second container can be increased by providing a plurality of ribs in the second container. That is, a plurality of ribs are provided between the plurality of through holes, and the ribs provided at the central portion of the second container are formed larger than the ribs provided at the upper and lower portions, so that even if the thickness of the second container is reduced, The strength of the second container can be increased and the manufacturing cost of the second container can be reduced.

In addition, according to the storage tank for a chemical according to the present invention, since the ladder mounted on the storage tank is removably provided, the manufacturing cost can be reduced when a plurality of storage tanks are applied.

1 is an exploded perspective view of a conventional chemical storage tank,
2 is a perspective view of a chemical storage tank according to a first embodiment of the present invention,
3 is a sectional view of the chemical storage tank shown in Fig. 2,
Fig. 4 is a side view of the chemical storage tank shown in Fig. 2,
5 is a perspective view of a chemical storage tank according to a second embodiment of the present invention,
FIG. 6 is a side view of the chemical storage tank shown in FIG. 5,
7 is a perspective view of a chemical storage tank according to a third embodiment of the present invention,
FIG. 8 is a side view of the chemical storage tank shown in FIG. 7,
9 is a side view showing a state where a ladder is mounted on a storage tank for a chemical agent according to the present invention.

These and other objects and novel features of the present invention will become more apparent from the description of the present specification and the accompanying drawings.

The term "chemical storage tank" as used in the present invention refers to a chemical storage tank, a stirring tank, a waste water treatment tank, a glacial acid tank for the food industry, a drinking water storage tank, a combination tank, Storage tanks which can be used as medicine storage tank, pickling tank, plating tank, wastewater tank, oil storage tank, agricultural pesticide storage tank, agriculture and marine storage tank, aquaculture tank, washing tank, waste liquid waste tank, .

[Example 1]

Hereinafter, Embodiment 1 of the present invention will be described with reference to Figs. 2 to 4. Fig.

FIG. 2 is a perspective view of a chemical storage tank according to a first embodiment of the present invention, FIG. 3 is a sectional view of the chemical storage tank shown in FIG. 2, It is a side view of the tank.

As shown in FIGS. 2 and 3, the storage tank for a chemical agent according to the first embodiment of the present invention has a bottom surface closed, an upper surface gradually narrowed in width, and a lid 300 at an upper end thereof (100) for storing chemicals such as hydrochloric acid, nitric acid, sulfuric acid, sodium hydroxide, glacial acetic acid, hydrogen peroxide and the like, and a second container And a second container 200 integrally formed with the first container 100 at the bottom surface 101 and the top 102 of the container 100 and spaced apart from the first container 100 in the circumferential direction.

The first container 100 is made of polyethylene (PE) resin. However, the first container 100 is not limited to the polyethylene (PE) resin but may be a polypropylene resin or the like depending on the type of the stored chemical. You may.

The second container 200 is a material different from the first container 100 and is made of engineering plastic. Engineering plastics are excellent in mechanical strength, heat resistance and abrasion resistance, and polyamide resins can be used as industrial plastics used in various devices including automobiles. In the second container 200 according to the present invention, the engineering plastic may include one or more of aramid fiber, glass fiber, and carbon fiber as reinforcing fibers for improving mechanical stiffness and heat resistance .

The aramid fiber is an aromatic polyamide fiber and does not break off better than carbon fibers and glass fibers, and is light and tough, which is suitable as a shock absorbing material. Aramid fiber does not burn well and has excellent heat resistance and flame retardancy to carbonize when it is over 500 degrees Celsius. The aramid fibers are produced by combining aramid-bonded -CONH with aromatic rings such as benzene rings to form a polymer polyamide, and a meta system represented by poly (m-phenylene isophthalamide) and a poly (p- Amide), and para-aramid fibers having properties such as high strength, high elasticity and high damping are preferably used.

The glass fiber is a man-made fiber having a long and thin glass having a low alkali content and is excellent in heat resistance, corrosion resistance and moisture resistance and is used as a heat insulating material, a soundproofing material, an insulating material, a filter material and an optical communication material.

The carbon fiber is a fibrous material made of carbon and is produced by a method of carbonizing the precursor organic fibers such as polyacrylonitrile and pitch to carbonize it. The carbon fiber has a structure in which the carbon nanotubes are oriented and has a very high elastic modulus and tensile strength Lt; / RTI > The carbon material is a material with low specific gravity, chemical resistance, corrosion resistance, and conductivity.

In the present invention, as described above, reinforcing fibers are included in engineering plastics to further increase mechanical strength, heat resistance, abrasion resistance and the like, and such reinforcing fibers preferably contain 10 to 25% by weight of 100% by weight of engineering plastics Do. If the amount of the reinforcing fiber is less than 10% by weight, the reinforcing fiber is not suitable for achieving the function of the reinforcing fiber. If it exceeds 25% by weight, the reinforcing fiber is exposed from the surface of the second container 200, % By weight.

As described above, since the second container 200 has a higher strength than the first container 100, the first container 100 is supported to prevent the first container 100 from being expanded and broken by the chemical agent.

As shown in FIG. 3, the first container 100 and the second container 200 are spaced 10 to 30 mm from each other in the entire circumferential direction. However, the separation distance is not limited to the above range, but may be changed depending on the size of the storage tank for the chemical and the type of the chemical to be stored. That is, the separation distance is sufficient if the first container 100 can be inflated to such an extent that the first container 100 is not broken due to the expansion of the chemical to be stored in the first container 100. Since the second container 200 is separated from the first container 100 as described above, the second container 200 can be separated from the first container 100 while allowing the expansion of the first container 100 itself by a distance 100), so that breakage of the first container 100 can be effectively prevented.

2 and 4, a plurality of through holes 210 are formed in the second container 200 in the circumferential direction, and the plurality of through holes 210 are formed so as to extend from the bottom to the top, . The through hole 210 has a substantially elliptical shape. Since the interval between the through hole and the through hole can be changed according to the size of the chemical storage tank and the type of the chemical to be stored, It is not. As described above, by increasing the size of the through hole 210 in the bottom surface of the second container 200 and decreasing the size of the through hole in the upward direction, as shown by arrows in FIG. 3, It is possible to reduce the heat generation in the chemical substance stored in the interior of the apparatus 100. [

As shown in FIG. 3, the first container 100 and the second container 200 are spaced apart from each other at the bottom of the second container 200, and the chemical storage tank is installed outdoors At least two openings 220 are provided as shown in FIGS. 2 and 4 for removing impurities deposited between the first container 100 and the second container 200. In this case, Therefore, when impurities are deposited between the first container 100 and the second container 200, if the water is cleaned through the plurality of through holes 210, the water is drained through the opening 220, .

As a result of the expansion of the chemical agent stored in the first embodiment of the present invention in which the second container 200 having a higher strength than the first container is provided as described above and spaced apart from the first container 100, 100 can be prevented from being damaged.

[Example 2]

Next, a second embodiment according to the present invention will be described with reference to Figs. 5 and 6. Fig.

FIG. 5 is a perspective view of a chemical storage tank according to a second embodiment of the present invention, and FIG. 6 is a side view of the chemical storage tank shown in FIG. In the description of the second embodiment, only the main configuration is described, and the other configurations are the same as those in the first embodiment, and therefore repeated description thereof will be omitted.

That is, as shown in FIGS. 5 and 6, the storage tank for a chemical agent according to the second embodiment of the present invention includes a plurality of Ribs 230 are provided, and the other structures are the same as those of the first embodiment.

The plurality of ribs 230 protrude horizontally from the bottom surface 101. Since the number of the ribs 230 and the height and width of the projecting portions of the ribs 230 can be changed according to the type of the chemicals to be stored in the first container 100 and the size of the storage tank, But is not limited thereto. Since the central portion of the container first expands according to the expansion of the material stored in the container, a rib provided at the central portion of the second container 200 is prevented from being damaged by the upper portion of the container And ribs provided at the lower portion.

As described above, according to the second embodiment in which a plurality of ribs 230 are provided horizontally in the second container 200, the strength of the second container 200 can be increased as compared with the first embodiment.

[Example 3]

Next, a third embodiment according to the present invention will be described with reference to FIGS. 7 and 8. FIG.

FIG. 7 is a perspective view of a chemical storage tank according to a third embodiment of the present invention, and FIG. 8 is a side view of the chemical storage tank shown in FIG. In the description of the third embodiment, only the main configuration is described, and the other configurations are the same as those in the first embodiment, and a repetitive description thereof will be omitted.

That is, as shown in FIGS. 7 and 8, the storage tank for a chemical agent according to the third embodiment of the present invention may include a plurality of chemical containers (not shown) in the second container 200 for increasing the tensile strength of the second container 200 Ribs 230 are provided, and the other structures are the same as those of the first embodiment.

The plurality of ribs 230 protrude vertically from the bottom surface 101. Since the number of the ribs 230 and the height and width of the projecting portions of the ribs 230 can be changed according to the type of the chemicals to be stored in the first container 100 and the size of the storage tank, But is not limited thereto. In addition, since the central portion of the container expands first according to the expansion of the substance stored in the container, the ribs 230 provided in the second container 200 are prevented from being damaged, It is possible to form the central part of the light guide plate large and smaller toward the upper and lower parts.

As described above, according to the third embodiment in which the plurality of ribs 230 are provided in the vertical direction in the second container 200, the strength of the second container 200 can be increased as compared with the first embodiment.

[Example 4]

Next, a fourth embodiment according to the present invention will be described with reference to FIG.

9 is a side view showing a state where a ladder is mounted on a storage tank for a chemical agent according to the present invention. In the description of the fourth embodiment, only the main configuration is described, and the other configurations are the same as those in the first embodiment, and thus repeated description thereof will be omitted.

The storage tank for a chemical agent according to the fourth embodiment of the present invention is equipped with a ladder 400 as shown in FIG. According to the fourth embodiment of the present invention, since the ladder 400 is detachably provided unlike the prior art in which the ladder is fixedly mounted, manufacturing cost can be reduced when a plurality of storage tanks are applied.

9, the ladder 400 may be inserted into and fixed to the uppermost through-hole 210 formed in the second container 200. [ Therefore, the stability of the ladder can be maintained compared with the case of using a normal ladder.

Next, a process of integrally manufacturing the first container 100 and the second container 200 will be described with reference to FIG.

3, the storage tank for a chemical agent according to the present invention comprises a first container 100 made of polyethylene (PE) resin and a second container 200 made of engineering plastic, Is integrally formed with the second container (200).

First, the first container 100 is formed through the first container preform forming die. The first container preform forming die is made up of, for example, an upper mold and a lower mold. The upper mold is provided to correspond to the upper portion 102 to which the lid 300 is to be mounted, And is provided in a cylindrical shape. In addition, the upper mold is provided with a raw material input port for inputting PE resin. The first container 100 may be molded through the first container preform forming die, but the present invention is not limited to this and may be carried out by blow molding.

Then, the second container 200 can be formed by insert molding using the engineering plastic in the second container preform molding die, and the first container 100 manufactured as described above. The first container 100 and the second container 200 are spaced apart by 10 to 30 mm in the molding of the second container so that the first container 100 and the second container 200 are molded It is preferable to arrange the filler to be removed after the insert molding.

As described above, since the first vessel and the second vessel are integrally formed, the bottom surface 101 and the upper side 102 of the chemical storage tank can be manufactured by mixing PE resin and engineering plastic.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

By using the storage tank for chemicals according to the present invention, an additional process for mounting the guide bracket to a storage tank such as the prior art can be omitted.

100: first container
200: Second container
300: lid
400: Ladder

Claims (4)

A cylindrical reservoir for chemicals, the bottom of which is clogged, the top of which is gradually narrowed and the lid is openably /
A first container made of polyethylene (PE) resin,
And a second container made of engineering plastic, the second container being integrally formed with the first container and spaced apart from the first container in the bottom and top,
A plurality of through holes are formed in the circumferential direction of the second container, and the through holes are formed to have a smaller inner diameter from the bottom to the top,
A plurality of ribs are provided between the plurality of through holes,
Wherein the ribs provided at the central portion of the second container are formed larger than the ribs provided at the upper and lower portions.
delete The method of claim 1,
Wherein the engineering plastic contains aramid fiber, glass fiber or carbon fiber as the reinforcing fiber, and the reinforcing fiber comprises 10 to 25% by weight based on 100% by weight of the engineering plastic. Storage tank. The method of claim 1,
The first container and the second container are arranged to be spaced apart by 10 to 30 mm in the entire circumferential direction, and at the peripheral portion of the bottom surface in the second container, And an opening is provided in the tank.

Images