WO2016137217A1 - Flange structure and pump module provided with same - Google Patents

Abstract

A flange structure is provided. The flange structure comprises: a flange member, which is installed on one side of the interior of a tank so as to install a pump in the tank in order to discharge a liquid stored in the tank to the outside of the tank, has the pump installed on one side thereof, and comprises an accommodation part, in which a PCB is accommodated, on the other side thereof; and a flange cover coupled to the flange member so as to seal the PCB, wherein a first discharge tube of the pump installed on the flange member extends toward the flange cover and is connected to a second discharge tube formed on the other side of the flange member outside the tank.

Description

Flange Structure and Pump Module With The Same

The present invention relates to a flange structure and a pump module having the same.

In general, exhaust systems of diesel engines include exhaust gas aftertreatment devices such as Selective Catalyst Reduction (SCR), Diesel Oxidation Catalyst (DOC), Catalyst Particulate Filter (CPE), etc. to reduce NOx contained in the exhaust gas. Equipped with.

Among these, the SCR-applied exhaust gas post-treatment apparatus (hereinafter referred to as an 'SCR apparatus') injects a reducing agent such as an aqueous urea solution into the exhaust pipe to reduce nitrogen oxides in the exhaust gas to nitrogen and oxygen. do.

That is, when the reducing agent is injected into the exhaust pipe, the reducing agent is converted into ammonia (NH ₃ ) by the heat of the exhaust gas, and nitrogen oxide is catalyzed by the nitrogen oxide and ammonia in the exhaust gas by the SCR catalyst. It may be reduced to nitrogen gas (N ₂ ) and water (H ₂ O).

As such, in order to spray the urea solution into the exhaust pipe through the SCR apparatus, a urea solution supply system for supplying the urea solution to the SCR apparatus is required.

The urea aqueous solution supply system basically includes a urea tank for storing the urea aqueous solution, and a pump module configured to supply the urea aqueous solution to the SCR device.

In the prior art, it was difficult to assemble a pressure sensor on a flange, and it was difficult to arrange a plurality of parts in a limited space. In addition, a sensor or the like mounted on the flange could be corroded from the strongly basic aqueous urea water solution.

One embodiment of the present invention to provide a flange structure and a pump module having the same, it is possible to reliably pump a strong basic urea water aqueous solution to the injector, to assemble a pressure sensor, and to place a plurality of parts in a limited space. do.

According to an aspect of the invention is installed on one side of the tank to install a pump inside the tank to discharge the liquid stored in the tank to the outside of the tank, the pump is installed on one side, the other side PCB A flange member including a flange member including a receiving portion in which a substrate is accommodated, and a flange cover coupled to the flange member to seal the PCB substrate, wherein the first discharge pipe of the pump installed on the flange member extends toward the flange cover side, and the tank A flange structure is provided that is connected with a second discharge pipe formed on the other surface side of the flange member on the outside.

At this time, the receiving portion is a receiving groove in which the PCB substrate and the second discharge pipe is installed; And a first wall portion formed around the receiving groove, wherein the first wall portion may be coupled to the flange cover.

At this time, the first wall portion is connected to both ends of the first surface and the first surface and the first surface is formed through holes through which one end of the second discharge pipe is inserted to form the receiving groove together with the first surface It may include cotton.

In this case, the height of the first surface may be higher than the height of the second surface.

In this case, the height of the first surface is constant, and the height of the second surface may decrease at a predetermined angle as it moves away from the first surface.

In this case, the second surface may have a round shape.

In this case, the predetermined angle may be 5 degrees or more and 20 degrees or less.

At this time, the installation groove may include an installation groove formed to insert the PCB substrate on one surface of the receiving groove and a second wall portion formed around the installation groove.

In this case, a protrusion protruding toward the flange member may be formed on one side of the PCB substrate, and an insertion groove may be formed to insert the protrusion into one surface of the second wall.

At this time, it may include a PCB cover coupled to the second wall to cover and seal the PCB substrate.

In this case, a first groove into which a level sensor is inserted and a second groove into which a concentration sensor is inserted may be formed on one surface of the installation groove, and the PCB substrate may be installed on an upper side of the level sensor and the concentration sensor.

In this case, the flange cover may be coupled to the first wall portion, and a sealant may be applied to an end of at least one of the flange cover and the first wall portion.

At this time, the mounting hole is formed on one surface of the flange cover, and may include a ventilation member inserted into and fixed to the mounting hole.

According to another aspect of the present invention, a pump installed inside the tank for discharging the liquid stored in the storage tank to the outside of the tank, a heater positioned to surround the outer surface of the pump, the heater and the flange structure described above A pump module is provided that includes a coupling member coupled to the outside of the pump for coupling and a filter coupled to the flange structure to surround the pump, the coupling member and the heater and for filtering the liquid supplied to the pump.

The flange structure according to an embodiment of the present invention includes a PCB substrate to enable the electricity to pass through without the use of wires.

The flange structure according to the embodiment of the present invention may be stably fixed by sealing the PCB substrate without being exposed to the outside in a state accommodated in the receiving portion of the flange member.

The flange structure according to the embodiment of the present invention may include a first wall portion and a second wall portion to seal the PCB substrate, the level sensor, and the concentration sensor from the urea solution.

The flange structure according to an embodiment of the present invention may include a flange cover to electrically insulate the PCB substrate from the outside and completely isolate it from the external environment such as temperature and humidity to keep moisture and foreign matter from entering.

The flange structure according to an embodiment of the present invention can prevent the interference occurs when mounting the pressure sensor by adjusting the height of the first surface and the second surface.

The pump module according to an embodiment of the present invention can stably pump the strong basic urea water solution into the injector.

The flange structure and the pump module having the same according to an embodiment of the present invention includes a flange mounted to the bottom of the tank, so that the installation of the components of the pump module is simple.

1 is a perspective view showing that a pump module equipped with a flange structure according to an embodiment of the present invention is installed inside a tank.

2 is a perspective view showing a pump module equipped with a flange structure according to an embodiment of the present invention.

FIG. 3 is a cross sectional view taken along the line A-A of FIG. 2, with arrows indicating the flow of liquid.

Figure 4 is a perspective view showing that the heater and the pump is installed in the flange structure according to an embodiment of the present invention.

Figure 5 is a cross-sectional view of the flange member of the flange structure according to an embodiment of the present invention, the arrow represents the flow of liquid.

6 is a perspective view showing a flange structure according to an embodiment of the present invention.

7 is a perspective view showing that the PCB substrate and the PCB cover is mounted on the flange member of the flange structure according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for clarity, and like reference numerals designate like elements throughout the specification.

In this specification, terms such as "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof. In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only when the other part is "right on" but also another part in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is "below" another part, this includes not only the other part "below" but also another part in the middle.

Hereinafter, a flange structure and a pump module having the same according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view showing that a pump module equipped with a flange structure according to an embodiment of the present invention is installed inside a tank. 2 is a perspective view showing a pump module equipped with a flange structure according to an embodiment of the present invention. 3 is a cross-sectional view of A-A of FIG. 2 and arrows indicate the flow of liquid.

1 and 2, the pump module 3 to which the flange structure 1 is mounted according to an embodiment of the present invention includes a pump 9, a heater 19, a coupling member 13, and a filter 15. ) May be included.

In this case, the pump module 3 may be installed inside the tank 7 in which the liquid is stored, and stably pump the liquid to an injector (not shown) installed outside the tank. In addition, the pump module 3 includes a flange structure 1 which performs the temperature, level, filter function of the liquid stored in the tank 7 and is mounted at the bottom of the tank, thereby simplifying the installation of the components of the pump module.

1 and 2, in one embodiment of the present invention, the liquid stored in the storage tank 7 may be an aqueous urea solution 5 used as a reducing agent. At this time, the aqueous urea solution (5) is colorless, odorless, non-toxic, non-flammable, strongly basic (PH10 or more) and mixed in water at a 32.5% ratio.

The pump module 3 may be installed inside the tank 7 in which the urea water solution 5 is stored, and stably pump the strong basic urea water solution into an injector (not shown) installed outside the tank.

Referring to FIG. 3, in one embodiment of the present invention, the pump 9 is installed inside the tank 7 and pumps the urea water solution 5 stored in the tank 7 to the outside of the tank.

Meanwhile, as shown in FIG. 3, the pump 9 may have a suction pipe 12 and a first discharge pipe 11 adjacent to the lower side of the pump. Accordingly, the urea water solution 5 is sucked into the pump through the suction pipe 12 formed on the lower side of the pump and discharged to the outside of the pump through the first discharge pipe 11.

The suction pipe 12 and the first discharge pipe 11 of the pump 9 are installed adjacent to each other so that the aqueous urea solution 5 sucked through the suction pipe 12 does not pass through a motor (not shown) located inside the pump. It is discharged through the first discharge pipe 11 can protect the motor.

A plurality of first inlets 21 are formed on the lower side of the heater 19, and the plurality of first inlets are connected to the suction pipe 12 of the pump 9.

On the other hand, the heater 19 according to an embodiment of the present invention is positioned to surround the outer surface of the pump (9). The freezing point of the strongly basic aqueous urea water solution 5 is -11.5 degrees Celsius, and the volume at the freezing point expands 11%. In this case, the heater 19 may transfer heat to the pump 9 to prevent the urea water solution 5 from freezing.

Referring to FIG. 3, in one embodiment of the present invention, a coupling member 13 is provided for coupling the heater 19 and the pump 9. In this case, the coupling member 13 may be coupled to the outside of the pump 9 to couple the heater 19 to the flange structure 1, thereby fixing the heater inside the tank 7.

Meanwhile, referring to FIGS. 1 to 3, the filter 15 may be formed to surround the pump 9, the coupling member 13, and the heater 19. In this case, the filter 15 may be coupled to the flange structure 1, and a plurality of filter media 17 may be disposed on the outer surface of the filter.

In this case, as shown in FIG. 3, the filter 15 filters the urea water solution 5 stored in the tank 7 through the filter medium 17 and supplies it to the pump 9.

Figure 4 is a perspective view showing that the heater and the pump is installed in the flange structure according to an embodiment of the present invention. 5 is a perspective view showing a flange structure according to an embodiment of the present invention.

4 and 5, the flange structure 1 according to the exemplary embodiment of the present invention may include the flange member 30, the PCB substrate 63, and the flange cover 80. In this case, the flange structure 1 may include the flange member 30 to install the pump 9 and the heater 19 inside the tank 7.

Meanwhile, referring to FIGS. 3 and 4, the flange member 30 is installed on one side of the tank 7 and the lower side of the tank as shown in FIG. 2 to close a hole (not shown) formed in the bottom of the tank. Can be.

In this case, referring to FIG. 4, the pump 9, the heater 19, the filter 15, and the coupling member 13 may be installed on one surface of the flange member 30, for example, on an upper surface thereof, and then inside the tank 7. Can be fixed.

In addition, referring to FIG. 6, the other surface of the flange member 30, for example, a lower surface, may include an accommodation part 45 in which the PCB substrate 63 is accommodated. In addition, the lower surface of the flange member 30 is exposed to the outside of the tank 7 can discharge the urea water solution 5 to the outside of the tank.

3 to 6, the flange member 30 may be a circular plate having a circular cross section, and may further include a first wall portion 49 protruding downward of the disc. In this case, the flange member 30 may be a resin injection molded product produced by injection molding of resin.

4 and 5, the flange member 30 has a first mounting groove 31 and a second mounting groove 33 formed on an upper surface thereof, and a connection pipe 35 is provided on the second mounting groove. Can be. In addition, the flange member 30 may be provided with a second discharge pipe 37 connected to the connecting pipe 35 on the lower side.

In an embodiment of the present invention, the second mounting groove 33 of the flange member 30 may be formed on one surface of the flange member, for example, as shown in FIG. 4.

3 and 5, at least a portion of the first discharge pipe 11 formed on the lower surface of the pump 9 may be accommodated in the second mounting groove 33.

In addition, one end of the heater 19, for example, a lower end of the heater, may be accommodated together with at least a portion of the first discharge pipe 11 in the second mounting groove 33. Therefore, at least a part of the first discharge pipe 11 may be heated by the heater 19.

The heater 19 may include a heating member 25 for generating heat on one side and a plug 23 for supplying electrical energy to the heating member. In addition, although not shown, an outlet may be formed in the first mounting groove 31 of the flange member 30.

Referring to FIG. 3, the second discharge pipe 37 is a passage for discharging the urea water solution 5 to the outside of the flange member 30. In this case, the heater 19 may be formed such that one end thereof may heat a part of the second discharge pipe 37.

4 and 6, in an embodiment of the present invention, the second discharge pipe 37 may be formed at the lower side of the flange member 30, for example, as shown in FIG. 5. Can be.

On the other hand, referring to Figure 3, the second inlet 37a of the second discharge pipe 37 is connected to the connecting pipe 35, the outlet of the second discharge pipe 37 is formed extending in the horizontal direction as shown in FIG. As can be seen, it can penetrate through the first face 51 of the first wall portion 49, which is the side of the flange member 30, and can be exposed to the outside of the flange member.

Meanwhile, in the exemplary embodiment of the present invention, the flange member 30 has a first discharge pipe 11 and a second discharge pipe 37 on the inner surface of the second mounting groove 33 as shown in FIGS. 3 and 4. Connecting pipe 35 may be formed to connect to each other.

In this case, the connection pipe 35 may protrude from the inner surface of the second mounting groove 33 toward the heater 19.

Referring to FIG. 3, the discharge pipe 39 may be installed in the vertical direction in the connection pipe 35. The discharge pipe 39 may be formed in a straight shape and may be coupled to the first discharge pipe 11 of the pump 9.

In this case, the first sealing member 41 may be formed on the outer circumferential surface of the discharge tube 39 to seal between the discharge tube 39 and the connection tube 35.

Meanwhile, as illustrated in FIG. 6, a pressure sensor 43 may be mounted at one end of the second discharge pipe 37, for example, the second inlet 37a. The pressure sensor 43 compares the actual measured pressure with the target pressure to perform real-time feedback control of the pressure of the aqueous urea solution 5.

In an embodiment of the present invention, the first discharge pipe 11, the second discharge pipe 37, the connection pipe 35, and the discharge pipe 39 have a circular cross-section so that the urea water solution 5 may flow. It may be, but is not limited thereto.

6 and 7, in an embodiment of the present invention, the lower surface of the flange member 30 may include an accommodation part 45 in which the PCB substrate 63 is accommodated. The flange structure 1 according to an embodiment of the present invention includes a PCB substrate 63 to allow for electrical communication without using wires.

In one embodiment of the invention the receiving portion 45 may include a receiving groove 47 and the first wall portion (49). In this case, the PCB 47 and the second discharge pipe 37 may be installed in the accommodation groove 47 of the flange member 30.

As a result, the flange structure 1 according to the exemplary embodiment of the present invention may be stably fixed by sealing the PCB substrate 63 without external exposure in a state accommodated in the accommodation portion 45 of the flange member 30.

Referring to FIG. 6, in one embodiment of the present invention, the receiving groove 47 may be a semi-circular shape, but is not limited thereto. The PCB substrate 63, the level sensor 67, the concentration sensor 69, and the second discharge pipe may be provided. If 37 can be installed, it can be made in any shape.

In addition, in one embodiment of the present invention, the receiving groove 47 may be formed by recessing the flange member 30 in the inward direction, as shown in Figure 6 has a height at the edge of the flange member 30 The first wall 49 may be formed to form the receiving groove 47.

On the other hand, the first wall portion 49 may be formed to protrude around the receiving groove (47). In this case, the first wall 49 may be coupled to the flange cover 80 to seal the PCB substrate 63, the level sensor 67, and the concentration sensor installed in the receiving groove 47 from the urea water solution 5. have.

Referring to FIG. 7, in one embodiment of the present invention, the first wall portion 49 may include a first surface 51 and a second surface 53. In this case, a part of the second discharge pipe 37 may be inserted into the first surface 51 to form a through hole (not shown).

In an embodiment of the present invention, the outlet 37b of the second discharge pipe 37 may be inserted into the through hole and exposed to the outside of the flange member 30. Through this, the aqueous urea solution 5 stored in the tank 7 may be discharged to the outside of the tank.

Meanwhile, referring to FIG. 7, the first surface 51 may have a plate shape having a rectangular cross section. The second surface 53 may connect both ends of the first surface 51 to form an accommodation groove 47 together with the first surface 51. That is, the first surface 51 and the second surface 53 may be a closed curved surface to form the receiving groove 47 therein.

In this case, the second surface 53 may have a round shape connected to the first surface 51. At this time, the receiving groove 47 may be a semi-circular shape consisting of the first surface 51 and the second surface 53, but may be formed in any shape as long as it forms a closed curved surface to be sealed.

Meanwhile, referring to FIG. 6, the height of the first wall portion 49 may not be uniform. That is, the height of the first surface 51 may be higher than the height of the second surface 53.

In addition, the height of the first surface 51 is constant and the height of the second surface 53 may decrease at a predetermined angle Θ as the distance from the first surface. In this case, the predetermined angle Θ may be 5 degrees or more and 20 degrees or less.

This is because when the pressure sensor 43 is installed at the second inlet 37a of the second discharge pipe 37, if the height of the second surface 53 adjacent to the second inlet is high, interference may occur when the pressure sensor is mounted. to be.

Therefore, in an embodiment of the present invention, the height of the second surface 53 adjacent to the second inlet 37a is lowered to facilitate mounting of the pressure sensor.

In an embodiment of the present invention, as shown in FIG. 7, for example, an installation groove 55 may be formed on one surface of the accommodation groove 47 so that the PCB substrate 63 is inserted into the bottom surface of the accommodation groove. .

Through this, the flange structure 1 according to the exemplary embodiment of the present invention may electrically insulate the PCB substrate 63 from the outside and completely isolate the external environment such as temperature and humidity to keep moisture and foreign matter from invading. have.

On the other hand, the second wall portion 57 may be formed to protrude around the installation groove (55). At this time, the second wall portion 57 is coupled to the PCB cover 65 and the PCB substrate 63, the level sensor 67 and the concentration sensor 69 installed in the installation groove 55 from the urea water solution 5. It can be sealed.

Referring to FIG. 6, in an embodiment of the present disclosure, the fixing member 59 may include a fixing member 59 formed with a protrusion 59a so that the PCB substrate 63 and the second wall portion 57 may be coupled to each other. In this case, the PCB substrate 63 may be coupled to the protrusion 59 having at least one end protruding outward on one side thereof.

Through this, the flange structure 1 according to the exemplary embodiment of the present invention may be fixed to the PCB substrate 63 by being coupled to the second wall portion 57.

As shown in FIG. 6, the fixing member 59 may include a quadrangular body having a rectangular cross section, and may include a protrusion 59a on which both ends of the quadrangular body protrude. In addition, an insertion groove 61 may be formed on one surface of the second wall 57 so that the protrusion 59a may be inserted.

At this time, the insertion groove 61 may be formed in a shape corresponding to the protrusion (59a). In addition, the insertion groove 61 may be formed to be recessed in the horizontal direction of the second wall portion 57.

Meanwhile, referring to FIG. 7, a screw groove may be formed at an edge of the PCB board to be coupled to the second wall part 57 so that the PCB board 63 may be coupled to the bolt 87. The flange structure 1 according to an embodiment of the present invention may be fixed by coupling the PCB substrate 63 to the second wall portion 57 through the protrusion 59a and the bolt 87.

Meanwhile, referring to FIG. 6, in one embodiment of the present invention, the first groove 71 into which the level sensor 67 is inserted and the second groove into which the concentration sensor 69 is inserted into one surface of the installation groove 55 ( 73) can be formed.

In this case, the level sensor 67 may be an ultrasonic level sensor. The ultrasonic level sensor measures the water level in such a manner as to calculate the distance from the object by measuring and converting the time when the ultrasonic wave is reflected on the object and returning the ultrasonic wave.

In addition, the concentration sensor 69 may detect the concentration of the aqueous urea solution (5).

Meanwhile, referring to FIG. 6, the level sensor 67 may be installed vertically, and the concentration sensor 69 may be installed horizontally. Accordingly, the first groove 71 may have a longer length than the horizontal length, and the second groove 73 may have a longer length than the vertical length.

In addition, a PCB substrate 63 may be installed on the upper side of the level sensor 67 and the concentration sensor 69. Through this, the flange structure 1 according to the exemplary embodiment of the present invention may seal the level sensor 67 and the concentration sensor 69 by sealing the PCB substrate 63, thereby reducing manufacturing costs and simplifying the process. Can be.

Meanwhile, referring to FIG. 7, in one embodiment of the present invention, the PCB cover 65 may be combined with the second wall 57 to cover and seal the PCB substrate 63.

In this case, the PCB cover 65 may be coupled to the second wall 57 by laser welding or the like on the edge. In an embodiment of the present invention, the PCB substrate 63, the level sensor 67, and the concentration sensor 69 are inserted into the installation groove 55, the first groove 71, and the second groove 73. It can be integrally mounted to the flange member 30 by sealing through the cover 65.

On the other hand, the PCB cover 65 is the same as the shape of the PCB substrate 63, but may have any shape as long as it has a width that can cover the PCB substrate.

Referring to FIG. 6, the flange structure 1 according to an embodiment of the present invention may include a flange cover 80. The flange cover 80 may be coupled to the flange member 30 to seal the PCB substrate 63, the level sensor 67, and the concentration sensor 69 coupled to the receiving portion 45 of the flange member 30. .

Meanwhile, in one embodiment of the present invention, the flange cover 80 may be combined with the first wall 49. In this case, a sealant (not shown) may be applied to an end portion of at least one of the flange cover 80 and the first wall portion 49.

Referring to FIG. 7, the flange cover 80 may be formed to correspond to the first surface 51 and the second surface 53 of the first wall 49. One end of the flange cover 80 engaging with the first surface 51 may be lower than the height of the other end of the flange cover engaging with the second surface 53.

Accordingly, one end of the flange cover 80 coupled with the first surface 51 may have a plate shape having a rectangular cross section like the shape of the first surface 51. Similarly, the other end of the flange cover 80 coupled with the second surface 53 may be rounded like the shape of the second surface 53.

In this case, the height of the flange cover 80 may also be formed to correspond to the first surface 51 and the second surface 53. That is, the height of the flange cover 80 coupled with the first wall portion 49 on the lower surface of the flange member 30 may be the same.

The flange cover 80 may be coupled to the first surface 51 and the second surface 53 to seal the receiving groove 47 formed in the flange member 30. Accordingly, the flange cover 80 may have a semicircular shape capable of sealing the first surface 51 and the second surface 53.

Meanwhile, referring to FIG. 7, a mounting hole 81 may be formed on one surface, for example, an upper surface of the flange cover 80, through which the ventilation member 83 may be inserted and fixed. In this case, the mounting hole may have a circular cross section and may have a different inner radius and an outer radius, but may have any shape depending on the ventilation member 83 to be installed.

Ventilation member 83 of the flange structure 1 according to an embodiment of the present invention may be used, such as AVS 200 products of GORE's "Polyvent compact series". Since the ventilation member 83 is a general matter, it will be omitted below.

Meanwhile, the ventilation member 83 may be inserted into the mounting hole 81 and coupled to the flange cover 80. In addition, a second sealing member 85 may be formed on the outer circumferential surface of the ventilation member 83 to be sealed with the mounting hole 81.

In an embodiment of the present invention, the first sealing member 41 and the second sealing member 85 may seal the urea water solution 5 so as not to penetrate the flange structure 1 and the pump module 3 including the same. Can be.

In this case, the first sealing member 41 and the second sealing member 85 may be pressed at a set compression ratio and have a set thickness, for example, may be manufactured in the form of an O-ring made of a fluorine sealing cone.

The flange structure according to an embodiment of the present invention includes a PCB substrate to enable the electricity to pass through without the use of wires.

The flange structure according to the embodiment of the present invention may be stably fixed by sealing the PCB substrate without being exposed to the outside in a state accommodated in the receiving portion of the flange member.

The flange structure according to the embodiment of the present invention may include a first wall portion and a second wall portion to seal the PCB substrate, the level sensor, and the concentration sensor from the urea solution.

The flange structure according to an embodiment of the present invention may include a flange cover to electrically insulate the PCB substrate from the outside and completely isolate it from the external environment such as temperature and humidity to keep moisture and foreign matter from entering.

The flange structure according to an embodiment of the present invention can prevent the interference occurs when mounting the pressure sensor by adjusting the height of the first surface and the second surface.

The pump module according to an embodiment of the present invention can stably pump the strong basic urea water solution into the injector.

The flange structure and the pump module having the same according to an embodiment of the present invention includes a flange mounted to the bottom of the tank, so that the installation of the components of the pump module is simple.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components Other embodiments may be easily proposed by changing, deleting, adding, etc., but this will also be within the scope of the present invention.

The flange structure according to an embodiment of the present invention includes a PCB substrate to enable the electricity to pass through without the use of wires.

The flange structure according to the embodiment of the present invention may be stably fixed by sealing the PCB substrate without being exposed to the outside in a state accommodated in the receiving portion of the flange member.

The flange structure according to the embodiment of the present invention may include a first wall portion and a second wall portion to seal the PCB substrate, the level sensor, and the concentration sensor from the urea solution.

The flange structure according to an embodiment of the present invention may include a flange cover to electrically insulate the PCB substrate from the outside and completely isolate it from the external environment such as temperature and humidity to keep moisture and foreign matter from entering.

The flange structure according to an embodiment of the present invention can prevent the interference occurs when mounting the pressure sensor by adjusting the height of the first surface and the second surface.

The pump module according to an embodiment of the present invention can stably pump the strong basic urea water solution into the injector.

The flange structure and the pump module having the same according to an embodiment of the present invention includes a flange mounted to the bottom of the tank, so that the installation of the components of the pump module is simple.

Claims (14)

A flange structure for installing a pump inside the tank to discharge the liquid stored inside the tank to the outside of the tank, A flange member installed at one surface of the tank, the pump member being installed at one surface thereof, and a receiving member having a PCB substrate accommodated at the other surface thereof; And A flange cover coupled to the flange member to seal the PCB substrate, The first discharge pipe of the pump provided on the flange member extends toward the flange cover side, and is connected to a second discharge pipe formed on the other surface side of the flange member outside the tank. According to claim 1, The receiving portion An accommodation groove in which the PCB substrate and the second discharge pipe are installed; And Including a first wall portion formed around the receiving groove, A flange structure in which the first wall portion is coupled with the flange cover. The method of claim 2, The first wall portion A first surface having a through hole formed through one end of the second discharge pipe and penetrating therethrough; And And a second surface connecting both ends of the first surface to form the receiving groove together with the first surface. The method of claim 3, wherein The height of the first face is higher than the height of the second face. The method of claim 4, wherein The height of the first surface is constant, and the height of the second surface is reduced to a predetermined angle away from the first surface. The method of claim 5, The second surface is a flange structure having a round shape. The method of claim 5, The said predetermined angle is a flange structure of 5 degrees or more and 20 degrees or less. The method of claim 2, An installation groove formed to insert the PCB substrate on one surface of the accommodation groove; And A flange structure comprising a second wall portion formed around the installation groove. The method of claim 8, Is coupled to one side of the PCB substrate, A protrusion having at least one end protruding outward is formed, and an insertion groove is formed to insert the protrusion into one surface of the second wall. The method of claim 8, And a PCB cover coupled with the second wall portion to cover and seal the PCB substrate. The method of claim 8, One surface of the installation groove is formed with a first groove into which the level sensor is inserted and a second groove into which the concentration sensor is inserted, A flange structure in which the PCB substrate is installed on the level sensor and the concentration sensor. The method of claim 2, The flange cover is coupled to the first wall portion, And a sealant is applied to an end of at least one of the flange cover and the first wall portion. According to claim 1, One surface of the flange cover is formed with a mounting hole, And a ventilation member inserted into and fixed to the mounting hole. A pump installed inside the tank for discharging the liquid stored in the storage tank to the outside of the tank; A heater positioned to surround an outer surface of the pump; A coupling member coupled to the outside of the pump to couple the heater with the flange structure according to any one of claims 1 to 13; And And a filter coupled to the flange structure to surround the pump, the coupling member and the heater, the filter filtering the liquid supplied to the pump.

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