JP2012062685A - Suction device and suction vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abrasion of a flanged straight pipe provided on a suction port of a tank in a suction vehicle which sucks and recovers sewage water into a tank.SOLUTION: A suction device comprises: a tank 5(6) for sucking and recovering a recovery object through a suction port 51; a suction pump 21 decompressing air in the tank 5(6); a flanged straight pipe 52 provided at the suction port 51 of the tank 5(6); and a pipe coupling 33 connected to the flanged straight pipe 52. The pipe coupling 33 has: a hose connection part 332; a bent pipe part 331 connected to the downstream side of the hose connection part 332; a straight pipe part 333 connected to the downstream of the bent pipe part 331; and a pipe coupling side flange 334 formed at the downstream side end of the bent pipe part 331 or on the periphery of the intermediate part of the straight pipe part 333 and connected to a flange 521 of the flanged straight pipe 52. The straight pipe part 333 of the pipe coupling 33 is inserted into the flanged straight pipe 52 provided at the suction port 51 and covers the inner peripheral surface of the flanged straight pipe 52.

Description

  The present invention relates to a suction device for sucking and collecting an object to be collected such as sewage and waste liquid in a tank, and a suction wheel equipped with the suction device.

  2. Description of the Related Art Conventionally, a suction wheel that sucks and collects an object to be collected such as sewage and waste liquid in a tank is known (see, for example, Patent Document 1). The suction wheel sucks air in the tank by a suction pump to reduce the pressure, and sucks the object to be collected through the suction hose into the pressure-reduced tank at once.

  FIG. 10 shows a suction port 62 of a tank 61 mounted on a conventional suction wheel and its surroundings. As shown in this figure, a flanged straight pipe 63 is provided integrally with the tank 61 at the suction port 62 of the tank 61, and a pipe joint 64 is connected to the flanged straight pipe 63. The pipe joint 64 includes an elbow 641, a hose connection portion 642 for connecting the suction hose 65 to one end side of the elbow 641, and a straight pipe portion 643 connected to the other end side by welding. Further, a flange 644 is formed at the end of the pipe joint 64 (straight pipe portion 643) on the tank 61 side, and this flange 644 is bolted to the flange 631 formed at the end of the flanged straight pipe 63. It is concluded at.

JP 2010-168750 A

  By the way, the flow direction of the collection object sucked into the tank 61 from the suction port 62 through the suction hose 65 and the pipe joint 64 changes suddenly in the elbow 641. For this reason, the collection object sucked into the tank 61 violently collides with the inner wall of the elbow 641 due to inertia. Further, since the flow of the recovery object is complicated on the downstream side of the elbow 641, the recovery object easily collides with the inner wall of the flanged straight pipe 63 provided in the tank 61. As a result, the inner wall of the elbow 641 is significantly worn, and the inner wall of the flanged straight pipe 63 provided in the tank 61 is also worn.

  In order to restore the worn portion in the pipe joint 64 (elbow 641) to the original state, the pipe joint 64 may be replaced with a new one. However, in order to recover the worn portion of the flanged straight pipe 63 provided integrally with the tank 61, a part of the tank 61 around the flanged straight pipe 63 is cut and cut off. This requires a lot of labor and cost.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a suction device and a suction wheel that can prevent wear of a flanged straight pipe provided in a suction port of a tank.

  As means for solving the above-described problems, the suction device of the present invention is configured as follows.

  That is, the suction device of the present invention includes a tank that sucks and collects an object to be collected through a suction port, a pump for decompressing air in the tank, a straight pipe with a flange provided at the suction port of the tank, And a pipe joint connected to the flanged straight pipe, the pipe joint comprising a hose connection part, a bent pipe part continuous downstream of the hose connection part, and the bent pipe part. A straight pipe portion continuous downstream, and a pipe joint side flange formed around the downstream end of the bent pipe portion or the intermediate portion of the straight pipe portion and fastened to the flange of the flanged straight pipe; Have. And the straight pipe part of the said pipe joint is penetrated in the said straight pipe with a flange provided in the said suction port, The internal peripheral surface of the straight pipe with a flange is covered, It is characterized by the above-mentioned.

  According to the above suction device, since the straight pipe portion of the pipe joint covers the inner peripheral surface of the flanged straight pipe provided at the suction port of the tank, the recovery object collides with the inner peripheral surface of the flanged straight pipe. This prevents wear on the inner peripheral surface of the flanged straight pipe.

  The suction wheel of the present invention is equipped with the suction device.

  In the suction wheel, an air separator for separating and removing foreign matters in the air sucked from the tank by the pump, a switching valve operated when the air pressure in the tank is reduced, and in the discharge air of the pump An oil separator for separating and removing oil contained in the vehicle, and the air separator, the switching valve, and the oil separator are preferably installed at positions between the front and rear wheels on the left and right sides of the vehicle. .

  According to the above suction wheel, the air separator, the switching valve, and the oil separator are installed at the front and rear wheel positions on the same left and right sides of the vehicle, so that the switching valve and the oil separator are arranged on one side of the vehicle as in the conventional suction wheel. The air pipe can be shortened and the pipe resistance can be reduced as compared with the case where the air separator is installed at the position between the front and rear wheels and the air separator is installed behind the rear wheel on the opposite side of the vehicle.

  According to the suction device and the suction wheel of the present invention, the recovery object does not collide with the inner peripheral surface of the flanged straight pipe provided at the suction port of the tank, and the inner peripheral surface of the flanged straight pipe is worn. Is prevented.

It is a left view which shows the suction wheel which mounts the suction device which concerns on embodiment of this invention. It is a top view showing a suction wheel carrying a suction device concerning an embodiment of the invention. It is a rear view which shows the suction wheel carrying the suction device which concerns on embodiment of this invention. It is a piping diagram of the suction device concerning an embodiment of the invention. It is a figure which shows the pipe joint which concerns on embodiment of this invention, a straight pipe with a flange, etc. It is a figure which shows the pipe joint which concerns on the modification of this invention, a straight pipe with a flange, etc. It is a figure for comparing and explaining arrangement of a pipe joint concerning an embodiment of the invention, and a pipe joint concerning a modification of the present invention. It is a figure which shows the pipe joint which concerns on embodiment of this invention, a straight pipe with a flange, etc., Comprising: It is a figure for demonstrating expansion of the diameter size of a tank. It is a top view of the conventional suction wheel. It is a figure which shows the pipe joint which concerns on a prior art example, a straight pipe with a flange, etc.

  Hereinafter, a suction wheel equipped with a suction device according to an embodiment of the present invention will be described with reference to the drawings.

  1 is a left side view showing a suction wheel 2 equipped with a suction device 1 according to an embodiment of the present invention, FIG. 2 is a plan view showing the suction wheel 2, and FIG. 3 is a rear view showing the suction wheel 2. It is.

  In the illustrated suction wheel 2, a sub frame 4 is installed on a chassis frame 3 of the vehicle. On the sub-frame 4, a tank 5 for sucking and collecting a collection target is mounted at the rear. The collection object is, for example, sewage, waste liquid, or the like.

  The tank 5 includes a main body 6 having a rear end opening and a tailgate 7 for opening and closing the rear end opening. The tailgate 7 is pivotally supported on the upper rear end portion of the main body 6 via a hinge pin 8 so as to be rotatable. An opening / closing cylinder 9 is disposed between the main body 6 and the tailgate 7. The tailgate 7 opens and closes the rear end opening of the main body 6 by expanding and contracting the open / close cylinder 9.

  A suction / pressure pipe 41 is connected to the upper portion of the main body 6 of the tank 5, and a suction pump 21 (not shown in FIGS. 1 to 3) connected via the suction / pressure pipe 41. 4), the air in the tank 5 is pressurized and depressurized.

  The main body 6 of the tank 5 is formed with a suction port 51 for sucking a suction object, and one end side of the pipe joint 33 is connected to the suction port 51. A flexible suction hose 42 is connected to the other end side of the pipe joint 33. The pipe joint 33 will be described in detail later.

  The tip of the suction hose 42 is supported and fixed to the main body 6 of the tank 5 via a bracket 36. An opening / closing valve 34 is provided at the distal end of the suction hose 42, and a hose nipple 35 for connecting a hose (not shown) is attached to the distal end side of the opening / closing valve 34.

  On the lower side of the tailgate 7, a discharge port 12 with an on-off valve is provided. This on-off valve-equipped discharge port 12 is a discharge port for a collection object.

  The tank 5 is pivotally supported via a tilt pin 14 with respect to the subframe 4 (vehicle body), and a tilting cylinder 15 is disposed between the subframe 4 and the tank 5. By operating the tilting cylinder 15 to extend and contract, the tank 5 rises or turns around the tilting pin 14.

  When the suction wheel 2 sucks and collects the collection object in the tank 5, the pressure in the tank 5 is reduced, and the collection object is sucked into the tank 5 from the outside through the suction hose 42.

  On the other hand, when the suction wheel 2 discharges the object to be collected in the tank 5 to a predetermined place (for example, a sewage treatment plant), the air in the tank 5 is pressurized and discharged (not shown) connected to the discharge port 12 with the on-off valve. The collection object in the tank 5 is discharged to the outside through the hose. Further, the collection target in the tank 5 can be discharged by opening the tailgate 7 and rotating the tank 5 upright.

  Around the front portion of the tank 5, piping / equipment such as a suction pump 21, a sub oil separator 23, an oil separator 24, and a four-way valve 25 for increasing and reducing the pressure in the tank 5 are mounted. The suction pump 21 is connected to the engine via a power take-out device (PTO) (not shown) of the suction wheel 2 and is driven to rotate by the rotational power of the engine.

−Piping diagram−
Hereinafter, the piping configuration of the suction device 1 mounted on the suction wheel 2 will be described based on the piping diagram shown in FIG.

  Reference numeral 21 denotes a suction pump including a vane pump. The suction pump 21 is for increasing and reducing the pressure in the tank 5. The suction side of the suction pump 21 is connected to the first port 251 of the four-way valve 25 (switching valve) via the suction pipe 44. The suction pipe 44 is provided with a check valve 22 for preventing a backflow of air sucked by the suction pump 21. The discharge side of the suction pump 21 is connected to the fourth port 254 of the four-way valve 25 via the discharge pipe 45.

  A sub oil separator 23 and an oil separator 24 are installed on the pipe connecting the discharge side of the suction pump 21 and the fourth port 254 of the four-way valve 25. The oil contained in the air discharged from the suction pump 21 is first separated and removed by the sub oil separator 23 and then separated and removed by the oil separator 24. The oil separated and removed by the sub oil separator 23 and the oil separated and removed by the oil separator 24 are stored in an oil reservoir 24 a in the oil separator 24. The oil reservoir 24 a is connected to the oil supply port of the suction pump 21 through an oil supply pipe 43, and oil for lubricating and cooling the suction pump 21 is supplied through the pipe 43. In the middle of the oil supply pipe 43, an oil strainer 27 for removing foreign matter in the oil is provided.

  Reference numeral 26 denotes an exhaust pipe for discharging air on the discharge side of the suction pump 21. The base end portion of the exhaust pipe 26 is connected to the third port 253 of the four-way valve 25, and the silencer 30 is installed at the distal end portion of the exhaust pipe 26.

  The tank 5 is connected to the second port 252 of the four-way valve 25 via the suction / pressurization piping 41. An overflow stop valve 31 is installed at the end of the suction / pressurization pipe 41 on the tank 5 side (in the tank 5) to prevent the suction / recovery object from overflowing. Further, an overflow safety valve 29, an air separator 28, a safety valve 32, and the like are installed in the middle of the suction / pressurization piping 41.

  The overflow safety valve 29 is provided to close the flow path in the suction / pressurization pipe 41 in the event that the overflow of the suction / collection object cannot be stopped by the overflow stop valve 31.

  The air separator 28 is for separating and removing foreign matters such as dust contained in the air flowing in the suction / pressure piping 41 from the tank 5 side to the suction pump 21 side. The air separator 28 illustrated in FIG. 4 includes an inlet port 281 that serves as an air inlet into the air separator 28 when the tank 5 is decompressed, and an outlet port 282 that serves as an air outlet within the air separator 28 when the tank 5 is decompressed. Have In addition, the air separator 28 further includes a foreign matter separation filter 284 made of a punching metal, a metal net, or the like between the inlet port 281 and the outlet port 282. The portion indicated by reference numeral 283 provided on the air separator 28 is a viewing window made of transparent glass or the like, and the amount of deposited foreign matter separated from the viewing window 283 by the foreign matter separation filter 284 of the air separator 28 is confirmed. it can.

  In the suction device 1 having the above configuration, when a collection target such as sewage is sucked and collected in the tank 5, the suction pump 21 is driven and the switching handle of the four-way valve 25, which is a switching valve, is operated. The port 251 and the second port 252 are communicated, and the third port 253 and the fourth port 254 are communicated. As a result, the air in the tank 5 is sucked by the suction pump 21 through the air separator 28, the four-way valve 25, and the check valve 22, and externally through the sub oil separator 23, the oil separator 24, the four-way valve 25 and the exhaust pipe 26. Vomited. Thereby, the inside of the tank 5 is depressurized, and the collection object is sucked and collected in the tank 5 through the suction hose 42 and the pipe joint 33.

  Further, when pressurizing the inside of the tank 5 in the suction device 1, the suction pump 21 is driven and the switching handle of the four-way valve 25 is operated so that the first port 251 and the third port 253 communicate with each other. 252 and the fourth port 254 are communicated. As a result, outside air is sucked into the suction pump 21 through the exhaust pipe 26, the four-way valve 25, and the check valve 22, and enters the tank 5 through the sub oil separator 23, the oil separator 24, the four-way valve 25, and the air separator 28. Supplied.

  When the pressure in the tank 5 is released in the suction device 1, the switching handle of the four-way valve 25 is operated to connect the first port 251 and the fourth port 254, and the second port 252 and the third port 253. To communicate with. Thereby, the tank 5 communicates with the atmosphere via the air separator 28, the four-way valve 25, and the exhaust pipe 26.

−Fitting structure−
Next, the pipe joint 33 and the surrounding structure will be described. As shown in FIG. 5, in the main body 6 of the tank 5, a straight pipe 52 with a flange is formed at a suction port 51 for sucking an object to be sucked, and a pipe joint 33 is connected to the straight pipe 52 with flange. .

  The pipe joint 33 has a bent pipe part 331, and a hose connection part 332 for connecting the suction hose 42 is continuously formed on the upstream side of the bent pipe part 331, and on the downstream side of the bent pipe part 331. The straight pipe portion 333 is continuously formed. Further, a flange portion 334 (a pipe joint side flange) is formed around the downstream end portion of the bent pipe portion 331, and the flange portion 334 is formed at the end portion of the flanged straight pipe 52. It is fastened with bolts 66 to the tank side flange). In the pipe joint 33 illustrated in FIG. 5, a 90 ° elbow is employed as the bent pipe portion 331.

  The straight pipe portion 333 of the pipe joint 33 is inserted into a flanged straight pipe 52 provided in the suction port 51 of the main body 6 of the tank 5 and covers the inner peripheral surface of the flanged straight pipe 52. Therefore, according to the connection structure of the pipe joint 33 and the straight pipe 52 with flange, the recovery object does not collide with the inner peripheral face of the straight pipe 52 with flange, and the inner peripheral face of the straight pipe 52 with flange is not affected. Wear is prevented. As a result, the only member that is worn by collision with the object to be collected sucked from the suction port 51 is the easily replaceable pipe joint 33, and the tank 5 is used to replace the flanged straight pipe 52 provided integrally with the tank 5. Construction that cuts a part of is unnecessary.

  In addition to the pipe joint 33 described above, a pipe joint 33A as shown in FIG. 6 may be adopted. In this pipe joint 33A, the flange part 334 is not formed around the downstream end of the bent pipe part 331 but around the intermediate part of the straight pipe part 333 as compared with the pipe joint 33 described above. Is different.

  Also by such a connection structure of the pipe joint 33A and the flanged straight pipe 52, the straight pipe portion 333 of the pipe joint 33 covers the inner peripheral surface of the flanged straight pipe 52 provided integrally with the main body 6 of the tank. As a result, the object to be collected does not collide with the inner peripheral surface of the flanged straight pipe 52, and wear of the inner peripheral surface of the flanged straight pipe 52 is prevented.

  However, as shown in FIG. 7, a pipe joint 33 provided with a flange part 334 around the downstream end of the bent pipe part 331 and a pipe joint provided with a flange part 334 around the intermediate part of the straight pipe part 333. When comparing with 33A, the total height H when the former is adopted can be set lower than the total height H ′ when the latter is adopted, and the vehicle overturning angle of the suction wheel 2 is improved. Further, when the former is adopted and the total height H is made to coincide with the total height H ′ when the latter is adopted, the diameter size of the main body 6 of the tank 5 is correspondingly shown by the two-dot chain line in FIG. In addition, it is possible to increase the top position of the water surface and increase the amount of collection of collection objects.

-Arrangement of air separators-
Hereinafter, the arrangement of the air separator 28 and the like will be described. FIG. 2 is a plan view of the suction wheel 2 according to the present embodiment, and FIG. 9 is a plan view of a conventional suction wheel 2A.

  A conventional suction wheel 2A (suction device 1A) shown in FIG. 9 has the same piping configuration as that described based on FIG. 4 in the same manner as the suction device 1 according to this embodiment. However, the two are different in the arrangement of the air separator 28, the arrangement of the pipes connected to the air separator 28, and the like.

  That is, in the conventional suction wheel 2A, as shown in FIG. 9, the air separator 28 is installed on the rear side of the right rear wheel 17 (near the right rear portion of the tank 61), and the front wheel 16 and the rear wheel on the left side of the vehicle. 17, far away from the sub oil separator 23, the oil separator 24, the four-way valve 25, the silencer 30, and the like that are installed in the vicinity of 17 (near the front left portion of the tank 61). For this reason, the suction / pressure piping 41 </ b> A (41 </ b> A- 1 to 41 </ b> A- 4) that connects the tank 61 and the four-way valve 25 has to be long.

  For example, as shown in FIG. 9, the suction / pressurization piping 41A starts from the upper part of the tank 61 and extends to the right in the vehicle width direction along the circumferential direction of the trunk of the tank 61 (see reference numeral 41A-1). ) After reaching the overflow safety valve 29 installed on the right side of the tank 61, it extends to the rear of the vehicle and is connected to an air separator 28 installed on the right rear of the tank 61 (see reference numeral 41A-2). . The suction / pressurization piping 41A that has passed through the air separator 28 extends forward of the vehicle to the right side of the front end of the tank 61 (see reference numeral 41A-3), and then crosses under the tank 61 to the left side of the tank 61. It is connected to the installed four-way valve 25 (see reference numeral 41A-4).

  On the other hand, in the suction wheel 2 according to the present embodiment, as shown in FIG. 2, a sub oil separator 23 and an oil separator are provided between the front wheel 16 and the rear wheel 17 on the left side of the vehicle (in the vicinity of the left front portion of the tank 5). 24, a four-way valve 25, a silencer 30 and the like are installed, and an air separator 28 is also installed between the front wheel 16 and the rear wheel 17 on the left side of the vehicle in the same manner. Therefore, the suction / pressure piping 41 (41-1 to 41-3) connecting the tank 5 and the four-way valve 25 is much shorter than the suction / pressure piping 41A of the suction wheel 2A according to the conventional example. Yes.

  For example, the suction / pressurization piping 41 of the suction wheel 2 according to the present embodiment starts from the upper part of the tank 5 as shown in FIGS. (Refer to reference numeral 41-1) and connected to an overflow safety valve 29 installed on the left side of the tank 5. Thereafter, the suction / pressure piping 41 extends rearward of the vehicle, then reverses and extends forward of the vehicle, and is connected to the air separator 28 (see reference numeral 41-2). The suction / pressure piping 41 that has passed through the air separator 28 is connected to a four-way valve 25 installed near the air separator 28 (see reference numeral 41-3).

  As described above, according to the suction wheel 2 according to the present embodiment, the air separator 28, the sub oil separator 23, the oil separator 24, the four-way valve 25, the silencer 30, and the like are all connected to the front wheel 16 on the left side of the vehicle and the rear. Since they are installed together with the wheel 17, the length of the air pipe connecting these devices can be shortened compared to the conventional one. As a result, the piping resistance can be reduced, and the suction force of the collection object into the tank 5 can be increased.

  Further, in the conventional suction wheel 2 </ b> A, if the suction force of the collection object into the tank 61 is increased, the flow rate of the collection object passing through the suction port 62 (see FIG. 10) increases and is provided at the suction port 62. However, according to the suction wheel 2 according to the present embodiment, the flange provided in the suction port 51 (see FIGS. 5 and 6) may be accelerated. Since the object to be collected does not collide with the inner peripheral surface of the attached straight pipe 52, the suction force can be increased without worrying about wear of the inner peripheral face of the flanged straight pipe 52.

  In addition, since devices such as the air separator 28, the sub oil separator 23, the oil separator 24, the four-way valve 25, and the silencer 30 are all installed between the front wheel 16 and the rear wheel 17 on the left side of the vehicle, The person can work while staying in one place, and the work efficiency is improved.

  In the above embodiment, the devices such as the air separator 28, the sub oil separator 23, the oil separator 24, the four-way valve 25, and the silencer 30 are positioned on the left side of the vehicle between the front wheel 16 and the rear wheel 17 (front and rear wheels). However, the devices may be installed at a position between the front wheel 16 and the rear wheel 17 on the right side of the vehicle.

  The present invention is applicable to a suction device for sucking and collecting sewage, waste liquid, and the like in a tank and a suction wheel equipped with the suction device.

DESCRIPTION OF SYMBOLS 1 Suction device 2 Suction wheel 5 Tank 21 Suction pump 23 Sub oil separator 24 Oil separator 25 Four-way valve (switching valve)
28 Air Separator 33 Pipe Joint 33A Pipe Joint 331 Elbow (Bent Pipe)
332 Straight pipe part 51 Suction port 52 Straight pipe with flange 521 Flange (tank flange)
334 Flange (Fitting side flange)

Claims (3)

A tank for sucking and collecting the collection object through the suction port;
A pump for decompressing the air in the tank;
A flanged straight pipe provided at the suction port of the tank;
A pipe joint connected to the flanged straight pipe;
A suction device comprising:
The pipe joint includes a hose connection part, a bent pipe part continuous on the downstream side of the hose connection part, a straight pipe part continuous on the downstream side of the bent pipe part, and a downstream end part of the bent pipe part or A pipe joint side flange formed around the intermediate part of the straight pipe part and fastened to the flange of the flanged straight pipe,
A suction device, wherein a straight pipe portion of the pipe joint is inserted into the flanged straight pipe provided in the suction port and covers an inner peripheral surface of the flanged straight pipe.   A suction wheel equipped with the suction device according to claim 1. The suction wheel according to claim 2,
An air separator for separating and removing foreign substances in the air sucked from the tank by the pump;
A switching valve operated when the air pressure in the tank is reduced,
An oil separator for separating and removing oil contained in the discharge air of the pump,
The suction wheel, wherein the air separator, the switching valve, and the oil separator are installed at positions between the front and rear wheels on the same side of the vehicle.

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