JP6417171B2 - Exhaust gas purification reducing agent thawing device - Google Patents

Description

  The present invention relates to an exhaust gas purifying reducing agent thawing device that is provided in a working machine such as a hydraulic excavator equipped with an engine, an automobile, etc., and thaws the frozen exhaust gas purifying reducing agent with warmed engine cooling water. .

  There exists a thing shown by patent document 1 as this type of prior art. This prior art includes a reducing agent supply hose that supplies a reducing agent for purifying exhaust gas to a reducing agent catalyst that purifies the exhaust gas of the engine, that is, urea water, and a hot water hose that leads to engine cooling water that has cooled the engine to become hot water. Are provided in association with a reducing agent supply device connected via a connector.

  In this patent document 1, a reducing agent supply hose and a hot water hose are provided together, a composite hose body that is wrapped with aluminum stays and further covered with a tubular tube is provided, and the engine becomes hot water guided by the hot water hose. A technique is disclosed in which cooling water is used for thawing urea water frozen in a reducing agent supply hose and for keeping the inside of the reducing agent supply hose warm.

JP 2009-243279 A

  In the above-described conventional technology, for example, in a composite hose body portion disposed between a pump (reducing agent supply device) and a reducing agent catalyst, the frozen urea water in the reducing agent supply hose can be thawed. Since the joint part (connector part) of the reducing agent supply hose connected to the pump (reducing agent supply device) and the joint part (connector part) of the hot water hose are arranged apart from each other, this pump (reducing agent supply) In the joint part (connector part) of the reducing agent supply hose connected to the device), the heat of engine cooling water that has been heated by the hot water hose is not given, and it takes time to thaw frozen urea water. There is. That is, in the prior art, there is a problem that it takes a long time to obtain a sufficient function of purifying the exhaust gas of the engine by the reducing agent catalyst after starting the engine and circulating the engine cooling water. .

  The present invention has been made from the actual situation in the prior art described above, and its purpose is to quickly thaw the reductant for purifying exhaust gas frozen in the connector part of the reductant supply device to which the reductant supply hose is connected. It is an object of the present invention to provide a defrosting device for exhaust gas purifying reducing agent.

In order to achieve this object, the present invention provides a first connector portion to which a reducing agent supply hose that supplies a reducing agent for exhaust gas purification is connected to a reducing agent catalyst that purifies engine exhaust gas, and cools the engine. A reductant thawing device for exhaust gas purification provided in a reductant supply device having a second connector portion to which a hot water hose for guiding engine coolant that has become hot water is connected ; A reducing agent male connector provided in the reducing agent supply device; and a reducing agent female connector provided at an end of the reducing agent supply hose and fitted into the reducing agent male connector; the heat transfer member that is held between the mold connector and the reducing agent female connector is characterized in that the a first connector portion and the second connector portion is connected.

  In the present invention configured as described above, the heat of the engine cooling water that has been heated by the hot water hose is transmitted to the connector portion that connects the end of the reducing agent supply hose to the reducing agent supply device via the heat transfer member. Therefore, the exhaust gas reducing agent can be quickly thawed.

Further, this embodiment of the present invention configured as described can be heat transfer member is in close contact with both the reducing agent male connector reductant female connector, increasing the conduction efficiency of the heat carried by the heat transfer member.

Further, in the present invention, in the above invention, the second connector portion is provided in a hot water male connector provided in the reducing agent supply device and an end portion of the hot water hose, and is hot water inserted into the hot water male connector. and a female connector, said heat transfer member is characterized in that it is held between the hot male connector and the hot water female connector. The present invention configured as described above transmits the heat of hot water in the hot water hose transmitted to the hot water male connector provided in the reducing agent supply device and the hot water female connector provided at the end of the hot water hose with high conduction efficiency. It can transmit to the part of the reducing agent male connector and the reducing agent female connector which were provided in the reducing agent supply apparatus via a thermal member.

  Further, the present invention is the above invention, wherein the reducing agent supply device includes a reducing agent storage unit that stores the exhaust gas purifying reducing agent, a hot water storage unit that stores hot water guided by the hot water hose, A metal wall portion that is disposed at a boundary between the reducing agent storage unit and the hot water storage unit and that transmits heat of the hot water stored in the hot water storage unit, and the heat transfer member is connected to the reducing agent supply device. It is characterized by being placed in contact with the metal wall. In the present invention configured as above, the heat of the hot water stored in the hot water storage part of the reducing agent supply apparatus guided by the hot water hose is transmitted to the metal wall part of the reducing agent supply apparatus, and further through the heat transfer member. It can be communicated to the reducing agent male connector and the reducing agent female connector.

  Moreover, the present invention is characterized in that in the above invention, a composite hose is provided in which the reducing agent supply hose and the hot water hose are accommodated in parallel. The present invention configured as described above can heat the reducing agent supply hose arranged in the composite hose by the heat of the engine cooling water that has become the hot water led into the hot water hose arranged in the composite hose. it can.

  According to the exhaust gas purifying reducing agent thawing device of the present invention, the exhaust gas purifying reducing agent frozen at the connector portion of the reducing agent supply device can be quickly thawed. As a result, the present invention can shorten the time from when the engine is started and the engine cooling water is circulated until a sufficient function of purifying the exhaust gas of the engine by the reducing agent catalyst is obtained compared to the conventional case.

It is a block diagram which shows schematic structure of one Embodiment of the thawing | decompression apparatus of the reducing agent for exhaust gas purification | cleaning which concerns on this invention. It is a perspective view which shows the principal part structure of this embodiment. It is a front view which shows the principal part structure of this embodiment. It is a top view which shows the principal part structure of this embodiment. It is a side view which shows the principal part structure of this embodiment. It is a side view which shows the state which remove | excluded the hose, the female connector, and the heat-transfer member from the state shown in FIG. The longitudinal cross-sectional view which shows the state which connected the 1st warm water female connector provided in the edge part of the 1st warm water hose with which this embodiment is provided to the 1st warm water male connector provided in the warm water storage part of a reducing agent supply apparatus. It is. It is a longitudinal cross-sectional view of the 1st hot water female connector shown in FIG. It is a longitudinal cross-sectional view of the 1st hot water male connector shown in FIG. It is a top view which shows the heat-transfer member with which this embodiment is equipped. It is the figure seen from the F direction of FIG.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an exhaust gas purifying reducing agent thawing device according to the present invention will be described below with reference to the drawings.

  The exhaust gas purifying reducing agent thawing device according to the present embodiment is disposed, for example, in the engine compartment of a hydraulic excavator. As shown in FIG. 1, an engine 1 for driving a hydraulic pump (not shown), a reducing agent catalyst 2 for purifying exhaust gas of the engine 1, and an exhaust of urea water or the like in the reducing agent catalyst 2 are disposed in the engine chamber. A reducing agent injection device 3 that injects a reducing agent for gas purification (hereinafter referred to as “reducing agent”) is disposed.

  Further, a reducing agent tank 4 in which the reducing agent is accommodated, and a pump for supplying the reducing agent accommodated in the reducing agent tank 4 to the reducing agent injection device 3, that is, a reducing agent supply device 5, are arranged in the engine compartment. It is.

  In the present embodiment, as shown in FIG. 1, a first hot water hose 11 that cools the engine 1 and cools the engine 1 into hot water to the reducing agent supply device 5, and the reducing agent supply device 5 to the reducing agent injection device 3. And a first reducing agent supply hose 12 for supplying a reducing agent to the battery.

  The present embodiment also includes a second reducing agent supply hose 13 that returns excess reducing agent from the reducing agent supply device 5 to the reducing agent tank 4, and the engine that has become the above-described warm water from the reducing agent supply device 5 to the reducing agent tank 4. The second hot water hose 14 for guiding the cooling water, the third reducing agent supply hose 15 for guiding the reducing agent from the reducing agent tank 4 to the reducing agent supply device 5, and the engine cooling water whose temperature has decreased from the reducing agent tank 4 are supplied to the engine 1. And a third hot water hose 16 leading to

  The first hot water hose 11, the second hot water hose 14, and the third hot water hose 16 described above form a cooling water circulation path of the engine 1.

  In addition, as shown in FIG. 1, the present embodiment includes a first composite hose 20 that includes, for example, a second reducing agent supply hose 13, a second hot water hose 14, and a third reducing agent supply hose 15. Moreover, the 2nd compound hose 21 which includes the 2nd reducing agent supply hose 13, the 2nd warm water hose 14, the 3rd reducing agent supply hose 15, and the 3rd warm water hose 16 is provided. Moreover, the 1st reducing agent supply hose 12 and the 3rd composite hose 22 which includes the 3rd warm water hose 16 are provided.

  As illustrated in FIG. 2, the reducing agent supply device 5 includes a reducing agent storage unit 5 a that stores a reducing agent, a hot water storage unit 5 b that stores hot water guided by the first hot water hose 11, and a reducing agent storage. The metal wall part 5c which is arrange | positioned at the boundary of the part 5a and the warm water accommodating part 5b, and the heat of the warm water accommodated in the warm water accommodating part 5b is transmitted.

  As shown in FIGS. 2 to 6, a first hot water female connector 30 a is attached to the end of the first hot water hose 11 described above, and the first hot water female connector 30 a is attached to the upper surface of the reducing agent supply device 5. The first hot water male connector 30b provided is fitted. A first reducing agent female connector 31 a is attached to the end of the first reducing agent supply hose 12, and the first reducing agent female connector 31 a is provided on the upper surface of the reducing agent supply device 5. The male male connector 31b is inserted.

  Similarly, a second reducing agent female connector 32 a is attached to the end of the second reducing agent supply hose 13, and the second reducing agent female connector 32 a is provided on the upper surface of the reducing agent supply device 5. 2 It is made to insert in the reducing agent male connector 32b. A second hot water female connector 33 a is attached to the end of the second hot water hose 14, and the second hot water female connector 33 a is a second hot water male connector 33 b provided on the upper surface of the reducing agent supply device 5. It is inserted in.

  Similarly, a third reducing agent female connector 34 a is attached to the end of the third reducing agent supply hose 15, and this third reducing agent female connector 34 a is provided on the upper surface of the reducing agent supply device 5. The third reducing agent male connector 34b is inserted. The connectors related to the third hot water hose 16 are not shown, but the third hot water hose 16 is connected to the reducing agent tank 4 and the engine 1 side by a combination of a female connector and a male connector as described above. To be connected to.

  Each of the female connector connected to each of the hoses 11 to 16 and the male connector provided on the upper surface of the reducing agent supply device 5 is substantially equivalent. Below, based on FIGS. 6-8, the 1st warm water female connector 30a attached to the edge part of the 1st warm water hose 11 and the 1st warm water male connector 30b provided in the reducing agent supply apparatus 5 are shown. Will be described as an example.

  As shown in FIGS. 7 and 8, the first hot water female connector 30a attached to the end of the first hot water hose 11 includes an insertion port 30a1 and a hollow portion 30a2 communicating with the insertion port 30a1. As shown in FIGS. 7 and 9, the first hot water male connector 30b provided in the reducing agent supply device 5 includes a first flange portion 30b1 having a large diameter and a second flange having a smaller diameter than the first flange portion 30b1. Part 30b2.

  As shown in FIG. 7, in a state where the first hot water female connector 30a is fitted into the first hot water male connector 30b, the lower end surface of the first hot water female connector 30a is the first hot water male connector 30b. Further insertion is prevented by one flange portion 30b1. Moreover, the 2nd flange part 30b2 of the 1st warm water male connector 30b is located in the cavity part 30a2 of the 1st warm water female connector 30a. Thus, in the state where the second flange portion 30b2 is located in the hollow portion 30a2, a gap 50 is formed as shown in FIG.

  In the present embodiment, the heat of the engine coolant that has been guided by the hot water hose, for example, the first hot water hose 11, becomes hot water, and the end of the reducing agent supply hose, for example, the first reducing agent supply hose 12, is supplied to the reducing agent supply device 5. 2-5, and the heat-transfer member 40 shown to FIG. 10, 11 which transmits as a heat which heats the connector part to connect, ie, the part of the 1st reducing agent female connector 31a and the 1st reducing agent male connector 31b. ing.

  As shown in FIGS. 10 and 11, the heat transfer member 40 includes a recess 41 disposed so as to contact the metal wall portion 5 c of the reducing agent supply device 5, and a first extension disposed on one side of the recess 41. It consists of one metal plate which has the installation part 42 and the 2nd extension part 43 arrange | positioned at the other side of the recessed part 41. As shown in FIG.

  As shown in FIG. 10, the first extending portion 42 of the heat transfer member 40 has a first hole that allows insertion of a portion located above the first flange portion 30 b 1 of the first hot water male connector 30 b. A portion 44 is formed. Similarly, in the first extending portion 42, the second hot water female connector 33a of the second hot water hose 14 is fitted and inserted above the large-diameter first flange portion of a second hot water male connector (not shown). A second hole 45 is formed to allow insertion of the located portion.

  In addition, a third hole portion 46 that allows insertion of a portion located above the first flange portion having the large diameter of the second reducing agent male connector 32b in the second extending portion 43 of the heat transfer member 40. Is formed. In addition, the second extending portion 43 is formed with a fourth hole portion 47 that allows insertion of a portion located above the large-diameter first flange portion of the first reducing agent male connector 31b. is there.

  The thickness dimension of the heat transfer member 40 is set to a thickness dimension substantially equal to the height dimension of the gap 50 shown in FIG.

  As shown in FIGS. 2 to 5, in the state where the first hot water male connector 30 b is inserted into the first hole 44 of the first extending portion 42 of the heat transfer member 40, the first hot water male connector 30 b is connected to the first hot water male connector 30 b. The first hot water female connector 30a is inserted and thereby the first extending portion 42 of the heat transfer member 40 is sandwiched between the first hot water female connector 30a and the first hot water male connector 30b. In this state, the lower end surface of the first hot water female connector 30a and the upper surface of the first extending portion 42 are in close contact, and the lower surface of the first extending portion 42 and the first flange portion 30b1 of the first hot water male connector 30b. Are in close contact with each other.

  Similarly, in a state where the second hot water male connector is joined to the second hole 45 of the first extending portion 42 of the heat transfer member 40, the second hot water female connector 33a is fitted into the second hot water male connector. As a result, the first extending portion 42 of the heat transfer member 40 is sandwiched between the second hot water female connector 33a and the second hot water male connector. In this state, the lower end surface of the second hot water female connector 33a and the upper surface of the first extension portion 42 are in close contact with each other, and the lower surface of the first extension portion 42 and the large-diameter first flange of the second hot water male connector. The part is in close contact.

  Further, the second reducing agent male connector 32b is inserted into the second reducing agent male connector 32b in a state where the second reducing agent male connector 32b is inserted into the third hole 46 of the first extending portion 43 of the heat transfer member 40. The mold connector 32a is inserted, whereby the second extending portion 43 of the heat transfer member 40 is sandwiched between the second reducing agent female connector 32a and the second reducing agent male connector 32b. In this state, the lower end surface of the second reducing agent female connector 32a and the upper surface of the second extending portion 43 are in close contact, and the lower surface of the second extending portion 43 and the large diameter of the second reducing agent male connector 32b are large. It will be in the state which the 1st flange part adhered.

  Further, the first reducing agent male connector 31b is inserted into the first reducing agent male connector 31b in the state where the first reducing agent male connector 31b is inserted into the fourth hole 47 of the second extending portion 43 of the heat transfer member 40. The mold connector 31a is inserted, whereby the second extending portion 43 of the heat transfer member 40 is sandwiched between the first reducing agent female connector 31a and the first reducing agent male connector 31b. In this state, the lower end surface of the first reducing agent female connector 31a and the upper surface of the second extending portion 43 are in close contact, and the lower surface of the second extending portion 43 and the large diameter of the first reducing agent male connector 31b are large. It will be in the state where the flange part adhered.

  In this embodiment configured as described above, the heat of the engine cooling water that has been heated by the first hot water hose 11 is transferred from the first hot water female connector 30a and the first hot water male connector 30b. Since it is transmitted to the first reducing agent male connector 31b and the first reducing agent female connector 31a through the first extending portion 42, the recessed portion 41, and the second extending portion 43, the reducing agent supply device. 5 of the reducing agent male connector 31b and the first reducing agent female connector 31a are quickly thawed, and the one reducing agent male connector 31b and the first reducing agent female connector 31a are Can keep warm. Therefore, the reducing agent in the reducing agent supply device 5 supplied from the reducing agent tank 4 shown in FIG. 1 by the third reducing agent supply hose 15 is the first reducing agent male connector 31b and the first reducing agent female connector 31a. Is supplied to the reducing agent injection device 3 through the first reducing agent supply hose 12 and is injected from the reducing agent injection device 3 onto the reducing agent catalyst 2. Thereby, the exhaust gas of the engine 1 is purified in the reducing agent catalyst 2.

  According to the present embodiment, the time from when the engine 1 is started and the engine cooling water is circulated until the sufficient function of purifying the exhaust gas of the engine 1 by the reducing agent catalyst 2 can be shortened.

  Further, in the present embodiment, the heat transfer member 40 is in close contact with both the first reducing agent male connector 31b and the first reducing agent female connector 31a, and increases the conduction efficiency of heat transmitted by the heat transfer member 40. Can do. As a result, the efficiency of thawing the exhaust gas purifying reducing agent frozen at the first reducing agent male connector 31b and the first reducing agent female connector 31a of the reducing agent supply device 5 is improved, and this first reduction is performed. The thermal insulation efficiency of the male agent type connector 31b and the first reducing agent female connector 31a can be improved.

  In the present embodiment, the first hot water male connector 30 b provided in the reducing agent supply device 5 and the first hot water female connector 30 a provided at the end of the first hot water hose 11 are closely attached to the heat transfer member 40. Therefore, the heat of the hot water guided by the first hot water hose 11 can be transmitted to the first reducing agent male connector 31b and the first reducing agent female connector 31a with high conduction efficiency.

  Further, in the present embodiment, the heat of the hot water guided by the first hot water hose 11 accommodated in the hot water storage unit 5b of the reducing agent supply device 5 is transmitted to the metal wall 5c of the reducing agent supply device 5, and further the heat transfer This is transmitted to the first reducing agent male connector 31b and the first reducing agent female connector 31a via the member 40. That is, in this embodiment, the heat of the hot water in the first hot water hose 11 transmitted from the first hot water female connector 30a and the first hot water male connector 30b to the heat transfer member, and the metal wall portion 5c of the reducing agent supply device 5 are used. Of the first reducing agent male connector 31b and the first reducing agent female connector 31a with high conduction efficiency by superimposing the heat superimposed on the heat of the hot water guided by the first hot water hose 11 from the heat transfer member 40 to the heat transfer member 40 Can tell.

  In addition, the present embodiment uses the heat of engine cooling water that has been led into the hot water hose disposed inside each of the first composite hose 20, the second composite hose 21, and the third composite hose 22 to generate hot water. The reducing agent supply hose disposed in the first composite hose 20, the second composite hose 21, and the third composite hose 22 can be heated. Thereby, the reducing agent supply hose part arrange | positioned inside each of the 1st composite hose 20, the 2nd composite hose 21, and the 3rd composite hose 22, and the reducing agent frozen in the vicinity of this reducing agent supply hose part Can be thawed and kept warm.

  In the above embodiment, the heat transfer member 40 is provided with the recess 41, and the recess 41 is brought into contact with the metal wall 5c of the reducing agent supply device 5. However, the present invention is configured in this way. For example, the heat transfer member 40 is formed in a flat plate shape that does not come into contact with the metal wall portion 5c, and is transmitted to the first hot water female connector 30a and the first hot water male connector 30b. You may make it the structure which transmits only the heat of the warm water in the hose 11 to the heat-transfer member 40. FIG.

  Moreover, although it is set as the structure which has the recessed part 41 which makes the heat-transfer member 40 contact the metal wall part 5c, the shape which the heat-transfer member 40 does not contact the 1st hot water female connector 30a and the 1st hot water male connector 30b For example, it is formed in a shape excluding the first extending portion 42 shown in FIG. 10, and the heat of the hot water guided by the first hot water hose 11 transmitted from the hot water storage portion 5b of the reducing agent supply device 5 to the metal wall portion 5c Only the heat transfer member 40 may be transmitted.

  In the present embodiment, the heat transfer member 40 is not sandwiched between the first reducing agent female connector 31a and the first reducing agent male connector 31b, and the first heat transfer member 40 is replaced with the first reducing agent. You may comprise so that it may be made to contact only at least one of the male connector 31b and the 1st reducing agent female connector 31a.

  Similarly, in the present embodiment, the heat transfer member 40 is sandwiched between the first hot water female connector 30a and the first hot water male connector 30b. However, the heat transfer member 40 is not configured to be sandwiched in this way. The member 40 may be configured to simply contact at least one of the first hot water female connector 30a and the first hot water male connector 30b.

DESCRIPTION OF SYMBOLS 1 Engine 2 Reducing agent catalyst 3 Reducing agent injection apparatus 4 Reducing agent tank 5 Reducing agent supply apparatus 5a Reducing agent accommodating part 5b Hot water accommodating part 5c Metal wall part 11 1st hot water hose 12 1st reducing agent supply hose 13 2nd reducing agent Supply hose 14 Second hot water hose 15 Third reducing agent supply hose 16 Third hot water hose 20 First composite hose 21 Second composite hose 22 Third composite hose 30a First hot water female connector 30a1 Insert 30a2 Cavity 30b 1st Hot water male connector 30b1 First flange portion 30b2 Second flange portion 31a First reducing agent female connector 31b First reducing agent male connector 32a Second reducing agent female connector 32b Second reducing agent male connector 33a Second hot water Female connector 33b Second hot water male connector 34a Third reducing agent female connector 3 b third reducing agent male connector 40 heat transfer member 41 recess 42 first extending portion 43 second extending portion 44 first hole 45 second hole 46 third hole 47 fourth hole portion 50 gap

Claims (4)

A first connector portion to which a reducing agent supply hose that supplies a reducing agent for exhaust gas purification is connected to a reducing agent catalyst that purifies the exhaust gas of the engine, and a hot water hose that guides engine cooling water that has cooled the engine to become hot water In the thawing device for reducing agent for exhaust gas purification provided in the reducing agent supply device having a second connector portion to be connected,
The first connector portion is
A reducing agent male connector provided in the reducing agent supply device;
A reducing agent female connector provided at an end of the reducing agent supply hose, and fitted into the reducing agent male connector;
An exhaust gas purifying reducing agent characterized in that the first connector portion and the second connector portion are connected by a heat transfer member sandwiched between the reducing agent male connector and the reducing agent female connector . Defroster. The exhaust gas purifying reducing agent thawing device according to claim 1 ,
The second connector part is
A hot water male connector provided in the reducing agent supply device;
Provided on an end portion of the hot water hose, and a hot water female connector to be fitted to the hot water the male connector,
The heat transfer member is sandwiched between the hot water male connector and the hot water female connector, and the exhaust gas purifying reducing agent thawing device. The exhaust gas purifying reducing agent thawing device according to claim 1 ,
The reducing agent supply apparatus is
A reducing agent storage portion in which the exhaust gas purifying reducing agent is stored;
A hot water storage unit in which hot water guided by the hot water hose is stored;
Disposed at the boundary between the reducing agent storage unit and the hot water receiving portion, wherein the metal walls hot water heat is transferred housed in the hot water receiving portion,
Said heat transfer member, the decompressor of the exhaust gas purifying reducing agent, characterized in that arranged in contact with the metal wall of the reducing agent supply device. The exhaust gas purifying reducing agent thawing device according to claim 3 ,
A reducing agent thawing device for exhaust gas purification, comprising a composite hose comprising the reducing agent supply hose and the hot water hose arranged side by side.

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