JP2022057016A - Suction vehicle - Google Patents

Abstract

To provide a suction vehicle in which a suction apparatus is disposed as compactly as possible to enable enlargement of a storage space of a receiver tank and furthermore which has excellent weight balance.SOLUTION: A suction vehicle 2 comprises: a receiver tank 5 collecting a collection object; and a suction apparatus 1 increasing/decreasing pressure of air inside the receiver tank 5 to cause flow of air. The suction apparatus 1 comprises: a water-sealed pump 25; a tertiary catcher 21 removing dust from air discharged from the inside of the receiver tank 5 at the suction time; and a quaternary catcher 22 removing dust from air having passed through the water-sealed pump 25. The quaternary catcher 22, one of the tertiary catcher 21 and the quaternary catcher 22, includes a body portion 22a and a horizontally extending portion 22b, at least a part of which horizontally extends from the body portion 22a. The tertiary catcher 21 is provided inside the horizontally extending portion 22b while the other of the tertiary catcher 21 and the quaternary catcher 22 vertically penetrates.SELECTED DRAWING: Figure 7

Description

The present invention relates to a suction wheel.

Conventionally, a suction vehicle in which a receiver tank (hopper) and a suction device are mounted on a chassis (traveling vehicle body) is known (see, for example, Patent Document 1). In this suction vehicle, as a suction device, a cyclone dust collector as a first catcher that removes dust from the dirty air discharged from the receiver tank, a water-sealed vacuum pump that creates a vacuum inside the receiver tank, and the like. It is equipped with a muffling water tank as a second catcher for removing dust and muffling the air flowing through the vacuum pump.

Japanese Unexamined Patent Publication No. 2006-96509

In a suction vehicle as described above, the vacuum pump, the first catcher and the second catcher are individually provided horizontally side by side on the chassis between the cab at the front of the chassis and the receiver tank at the rear of the chassis. The horizontal layout space was limited. In particular, in order to make the front-rear length of the receiver tank as long as possible to secure the storage space of the receiver tank, it is necessary to prevent the first catcher and the second catcher from expanding in the horizontal direction as much as possible, and it is necessary to move up and down. It had a long shape in the direction. As a result, there is a problem that the height of the upper ends of the first catcher and the second catcher becomes high, and the center of gravity of the vehicle tends to be high.

The present invention has been made in view of the above circumstances, and the suction device can be arranged as compactly as possible to increase the storage space of the receiver tank, and the suction has an excellent weight balance. The purpose is to provide a car.

The present invention constitutes means for solving the above-mentioned problems as follows. That is, the present invention is a suction wheel provided with a receiver tank that collects an object to be collected and a suction device that presses and depressurizes the air inside the receiver tank to generate an air flow. The first catcher includes a vacuum pump, a first catcher that removes dust of air discharged from the receiver tank at the time of suction, and a second catcher that removes dust of air that has passed through the vacuum pump. The catcher of either one of the above-mentioned second catcher and the second catcher has a main body portion and a horizontal extension portion at least a part extending in the horizontal direction from the main body portion, and the other catcher is inside the horizontal extension portion. It is characterized in that it is provided in a state of penetrating in the vertical direction.

According to the above configuration, the suction device can be arranged as compactly as possible to increase the storage space of the receiver tank, and it is possible to provide a suction wheel having an excellent weight balance. Specifically, by integrating the first catcher and the second catcher, it is possible to suppress the horizontal spread of the suction device even though one catcher has a horizontal extension portion. As a result, the suction device can be arranged as compactly as possible, and the storage space of the receiver tank can be increased.

In addition to this, one catcher can equip the horizontal extension with the necessary functions, so that the height of the upper end can be suppressed and the center of gravity of the vehicle can be lowered, and the weight balance of the suction vehicle can be maintained. .. Further, since the two catchers can be firmly connected to each other, the structure of the mounting portion can be simplified and the weight can be reduced as compared with the case where the two catchers are individually mounted on the chassis. As a result, it is possible to provide a suction wheel having an excellent weight balance.

In the suction wheel having the above configuration, the vacuum pump is placed in a space formed by the bottom surface of the horizontal extension portion of the one catcher and the lower side surface of the other catcher protruding downward from the horizontal extension portion. It is preferable that it is arranged.

According to the above configuration, since the vacuum pump, the first catcher and the second catcher are arranged at substantially the same position in the horizontal direction, it is possible to suppress the horizontal spread of the entire suction device and make it compact.

In the suction wheel having the above configuration, it is preferable that the one catcher is the second catcher and the horizontal extension portion is a water tank for removing dust of air passing through the vacuum pump.

According to the above configuration, by using the horizontal extension portion as a water tank, the horizontal balance of the suction wheel can be maintained even if a large amount of water is loaded. In particular, when the horizontal extension portion extends in the vehicle width direction, it is possible to prevent the weight balance of the vehicle in the vehicle width direction from being lost due to an increase or decrease in water.

In the suction wheel having the above configuration, the second catcher has the main body portion extending in the vertical direction and the horizontal extension portion that communicates with the main body portion internally and projects horizontally from the side surface of the main body portion. The horizontal extension portion is provided with an inflow port into which air from the vacuum pump flows, while the main body portion is provided with an air outlet, and the inside of the horizontal extension portion is provided. A rectifying wall is provided, and the rectifying wall guides the air entering from the inflow port to flow around the outer peripheral wall of the first catcher inserted inside the horizontal extension portion. Is preferable.

According to the above configuration, the outer peripheral wall of the first catcher penetrating the inside of the horizontal extension portion is effectively used, and by further providing a rectifying wall, the air is rectified so as to make a detour as much as possible in the horizontal extension portion. , The dust removal function and the water recovery function of the second catcher can be enhanced. As a result, the suction device can be compactly configured as a whole without adding a separate catcher.

According to the present invention, it is possible to arrange the suction device as compactly as possible to increase the storage space of the receiver tank, and it is possible to provide a suction wheel having an excellent weight balance.

It is a side view which shows the schematic structure of the suction wheel which concerns on embodiment of this invention. It is a top view of the suction wheel of FIG. It is an air piping diagram of the suction device mounted on the suction wheel of FIG. 1, and is the figure which shows the flow of the air at the time of suction. In the air piping diagram of FIG. 3, it is a figure which shows the flow of air at the time of pressurization. FIG. 3 is a perspective view of a water-sealed pump, a tertiary catcher, a quaternary catcher, and the like of a suction device mounted on the suction wheel of FIG. 1 as viewed from the front left. FIG. 3 is a perspective view of a water-sealed pump, a tertiary catcher, a quaternary catcher, and the like of the suction device mounted on the suction wheel of FIG. 1 as viewed from the left rear. It is a rear view which shows the 3rd order catcher and the 4th order catcher integrated. FIG. 7 is a cross-sectional view taken along the line X1-X1 of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show a suction wheel 2 according to an embodiment of the present invention. The suction device 1 is provided on the subframe 4 on the chassis 3 of the suction wheel 2. Specifically, a receiver tank 5 for collecting a recovery object made of, for example, sludge, earth and sand, waste liquid, and the like is mounted on the rear portion of the subframe 4.

The receiver tank 5 has, for example, a tank body 5a having a circular cross-section with a rear end opening and a tailgate 5c that opens and closes the rear end opening. The tailgate 5c is rotatably pivotally supported, for example, on the upper rear end of the tank body 5a via a hinge pin 5b. An opening / closing cylinder 5d is provided between the tank body 5a and the tailgate 5c, and by expanding / contracting the opening / closing cylinder 5d, the tailgate 5c can open / close the rear end opening of the tank body 5a. There is.

Below the tailgate 5c, a suction port 8 with an on-off valve that serves as a suction port for the object to be collected and a discharge port 9 with an on-off valve that serves as a discharge port for the object to be collected are provided. The receiver tank 5 is pivotally supported with respect to the subframe 4 via a tilting shaft 10 provided behind the subframe 4. That is, a tilting cylinder 11 is provided between the subframe 4 and the receiver tank 5. By expanding and contracting the tilting cylinder 11, the receiver tank 5 rotates upright or tilts around the tilting shaft 10.

As will be described in detail later, when the suction device 1 sucks and collects the object to be collected in the receiver tank 5, the suction hose connected to the suction port 8 is used from the outside due to the decompression and the air flow in the receiver tank 5. The object to be collected is sucked into the receiver tank 5. On the other hand, when the collection target in the receiver tank 5 is discharged to a sludge treatment plant or the like by the suction device 1, the air in the receiver tank 5 is pressurized and the receiver tank 5 is passed through a discharge hose (not shown) connected to the discharge port 9. The object to be collected inside is discharged to the outside. Further, by opening the tailgate 5c and rotating the receiver tank 5 upright, it is possible to discharge the object to be collected in the receiver tank 5.

Further, on the subframe 4 between the cab 13 and the receiver tank 5, a water-sealed pump 25 is provided on the subframe 4 to pressurize and depressurize the air in the receiver tank 5 to generate an air flow. Although not shown in detail, the water-sealed pump 25 is rotationally driven by the driving force of an engine (not shown) connected via the drive shaft of the PTO of the suction wheel 2. Piping connected to the water-sealed pump 25, various valves, an operation panel 15, and the like are arranged around the water-sealed pump 25.

As shown in FIGS. 3 to 6, the suction device 1 includes a receiver tank 5 as a primary catcher, a secondary catcher 20 composed of a cyclone type dust collector, and a tertiary catcher (“first catcher” of the present invention) 21. It is equipped with a quaternary catcher (“second catcher” of the present invention) 22 including an air-water separator and a water tank, and these devices are receiver tank pressurizing / depressurizing pipes 7 made of, for example, a metal round steel pipe. It is connected via. In the present embodiment, the tertiary catcher 21 and the quaternary catcher 22 are integrally provided. The specific configurations of the tertiary catcher 21 and the quaternary catcher 22 will be described later.

The receiver tank 5 is connected to the secondary catcher 20 by a first pipe 7a. Further, the secondary catcher 20 is connected to the tertiary catcher 21 by a second pipe 7b. The secondary catcher 20 is shown in FIGS. 3 and 4, but is omitted in FIGS. 1, 2, 5, and 6.

The water-sealed pump 25, the tertiary catcher 21, the quaternary catcher 22, and the integrated silencer 23 are connected to the air switching type four-way valve 24 via a pipe. Specifically, the water-sealed pump 25 has a suction port 25a and a discharge port 25b. The tertiary catcher 21 and the air switching type four-way valve 24 are connected by a third pipe 7c. Further, the suction port 25a of the water-sealing pump 25 and the air switching type four-way valve 24 are connected by a fourth pipe 7d. Further, the fourth catcher 22 and the air switching type four-way valve 24 are connected by a fifth pipe 7e. Further, the integrated silencer 23 and the air switching type four-way valve 24 are connected by the sixth pipe 7f. The discharge port 25b of the water-sealed pump 25 is connected to the fourth catcher 22 by a seventh pipe 7g.

At the time of suction, the tertiary catcher 21 and the suction port 25a of the water-sealed pump 25 are connected via an air switching type four-way valve 24, while the fourth catcher 22 and the integrated silencer 23 are connected to the air switching type four-way valve 24. It is designed to be connected via. Further, by switching the air switching type four-way valve 24, the integrated silencer 23 and the suction port 25a of the water sealing type pump 25 are connected via the air switching type four-way valve 24 at the time of pressurization, while the quaternary catcher. The 22 and the tertiary catcher 21 are connected via an air switching type four-way valve 24.

The pipe connecting the receiver tank 5 and the water-sealed pump 25 is provided with an ejector 30 that introduces air having a pressure higher than that on the upstream side of the pipe as drive air. Specifically, the ejector 30 is interposed in the fourth pipe 7d between the air switching type four-way valve 24 and the water sealing type pump 25. The fourth pipe 7d may be provided with a bypass passage (not shown) that passes from the air switching type four-way valve 24 to the suction port 25a without passing through the ejector 30. The drive air of the ejector 30 is supplied from an air tank (not shown) through a pipe. The air tank is provided on the chassis 3 side, for example, and stores pressurized air used when braking the vehicle. Pressurized air of, for example, 0.7 MPa is supplied from the air tank.

A four-way valve switching valve unit (not shown) is connected to the air switching type four-way valve 24 so that pressurized air from the air tank can be supplied. Pressurized air is supplied from the air tank to the air switching type four-way valve 24 based on the fact that any of the suction button 15a, the neutral button 15b, and the pressurizing button 15c provided on the operation panel 15 (see FIG. 1) is pressed. The air switching type four-way valve 24 is switched and controlled by the pressure of the pressurized air.

The operation of the suction device 1 having the above configuration will be described.

First, the PTO switch provided in the driver's cab 13 or the like is turned on while the suction vehicle 2 is stopped. Then, the driving force of the traveling engine of the vehicle is supplied to the water-sealed pump 25.

Next, the operator presses the suction button 15a on the operation panel 15 to start suction. Then, the spool of the air switching type four-way valve 24 moves to the suction side by the pressure of the pressurized air in the air tank.

Next, the air switching type four-way valve 24 is switched to the state shown in FIG. 3, and the air is sucked from the suction port 8 together with the drive of the water sealing type pump 25, and the object to be collected is collected in the receiver tank 5. Air passes through the receiver tank 5, the secondary catcher 20, and the tertiary catcher 21, passes through the air switching type four-way valve 24, and is sucked from the suction port 25a of the water-sealed pump 25. At this time, the air from the air switching type four-way valve 24 passes through the ejector 30.

At the start of suction, the negative pressure in the receiver tank 5 is not higher than the predetermined value (the pressure is equal to or higher than the predetermined value), so that the external air (atmosphere) is sucked through the external air introduction pipe. As a result, the atmosphere is introduced into the ejector 30. In this way, when the differential pressure between the atmosphere and the inside of the receiver tank 5 is small, such as when driving the water-sealed pump 25, the water-sealed pump 25 does not easily generate heat, so even if atmospheric pressure is used, the cooling capacity is sufficient. Can be demonstrated. Then, since the external air having a temperature lower than that of the sealed water is sent to the water-sealed pump 25, the temperature rise of the water-sealed pump 25 and the sealed water is suppressed.

On the other hand, when the negative pressure in the receiver tank 5 increases, the load on the water-sealed pump 25 increases, the heat generation increases, and the water temperature tends to rise. When the negative pressure increases, the sealed water tends to evaporate and cavitation tends to occur. Therefore, when the negative pressure in the receiver tank 5 becomes higher than a predetermined value, the pressurized air in the air tank is sent to the ejector 30. As a result, the negative pressure in the receiver tank 5 is further increased by the ejector effect. Further, a large amount of air is supplied to the water-sealed pump 25 from the ejector 30. The pressurized air ejected from the ejector 30 expands and the temperature drops when the pressure drops, so that a large amount of cold air is supplied to the water-sealed pump 25. As a result, it is possible to suppress an increase in the sealing temperature of the water-sealing pump 25, and there is no concern about cavitation.

The air sucked into the water-sealed pump 25 is discharged from the discharge port 25b, returns to the air switching type four-way valve 24 through the quaternary catcher 22, and is exhausted to the outside through the integrated silencer 23.

On the other hand, when switching from suction to medium positive, the operator presses the medium positive button 15b on the operation panel 15. Then, the spool of the air switching type four-way valve 24 returns to the center positive side due to the pressure of the pressurized air in the air tank.

Then, when switching from medium pressure to pressurization, the operator presses the pressurization button 15c on the operation panel 15. Then, the spool of the air switching type four-way valve 24 moves from the center positive side to the pressurized side due to the pressure of the pressurized air in the air tank.

Next, the air switching type four-way valve 24 is switched to the state shown in FIG. 4, the pressurized air is discharged from the discharge port 25b together with the drive of the water sealing type pump 25, and the air passing through the quaternary catcher 22 is an air switching type. It passes through the tertiary catcher 21 and the secondary catcher 20 through the four-way valve 24, reaches the receiver tank 5, and is discharged from the discharge port 9 together with the recovered object.

In the present embodiment, the tertiary catcher (first catcher) 21 and the fourth catcher (second catcher) 22 of the suction device 1 are integrally provided. Specifically, the quaternary catcher 22 has a horizontal extension portion 22b partially extended in the horizontal direction, and the tertiary catcher 21 is provided inside the horizontal extension portion 22b in a state of penetrating in the vertical direction. There is. This point will be described with reference to FIGS. 5 to 8.

The quaternary catcher 22 has a cylindrical main body portion 22a extending in the vertical direction and a cylindrical main body portion 22a that internally communicates with the main body portion 22a and protrudes in the left-right direction (vehicle width direction) from the side surface of the upper end portion of the main body portion 22a. It has a horizontal extension portion 22b. A cylindrical cleaning water tank 22c is integrally provided at the upper end of the main body 22a. The washing water stored in the washing water tank 22c can be washed by sprinkling water on and around the suction device 1 by a washing pump (for example, an electric pump) (not shown).

An air outlet 22d is provided on the upper end surface of the main body portion 22a, and this outlet 22d is connected to one end of a fifth pipe 7e housed inside the washing water tank 22c. The fifth pipe 7e is cut off from the washing water storage portion of the washing water tank 22c. The air inside the main body 22a is discharged to the air switching type four-way valve 24 side via the outlet 22d and the fifth pipe 7e.

Water is stored inside the main body 22a and the horizontal extension 22b, and the main body 22a and the horizontal extension 22b are water tanks for removing dust from the air that has passed through the water-sealing pump 25. An overflow port 22g is provided on the side surface of the main body portion 22a, and a water storage portion is provided from the bottom wall of the main body portion 22a and the horizontal extension portion 22b to the overflow opening 22g. The overflow port 22g is provided on the outer wall of the main body portion 22a on the side to which the horizontal extension portion 22b is not connected. As shown by the alternate long and short dash line in FIG. 7, the height position of the overflow port 22g is set to the maximum water level, and the water is drained from the overflow port 22g so that water does not collect above this maximum water level. A valve 22o for maintaining airtightness in the quaternary catcher 22 is attached to the overflow port 22g when drainage is not performed.

A recess 22h extending in the vertical direction is formed in the middle portion of the horizontal extension portion 22b in the left-right direction. In the recess 22h, a fourth pipe 7d for connecting the air switching type four-way valve 24 and the water sealing type pump 25 is arranged.

A tertiary catcher 21 having a cylindrical outer peripheral wall extending in the vertical direction is inserted into an end portion (left end portion in FIG. 6 or the like) of the horizontal extension portion 22b on the side not connected to the main body portion 22a. The tertiary catcher 21 is arranged inside the horizontal extension portion 22b in a state of penetrating in the vertical direction. Specifically, a pair of upper and lower through holes 22i are formed at the left end of the horizontal extension portion 22b, and an intermediate portion 21a of the tertiary catcher 21 is inserted into the upper and lower through holes 22i. The outer diameter of the intermediate portion 21a of the tertiary catcher 21 and the inner diameter of the upper and lower through holes 22i are substantially the same, and the outer peripheral wall of the intermediate portion 21a of the tertiary catcher 21 is welded to the inner peripheral edge of the upper and lower through holes 22i. It is connected by means such as. In this way, the intermediate portion 21a of the tertiary catcher 21 is fixed to the horizontal extension portion 22b of the quaternary catcher 22, and the tertiary catcher 21 and the quaternary catcher 22 are integrated. The inside of the tertiary catcher 21 and the inside of the horizontal extension portion 22b are shielded from each other so that water does not flow between the tertiary catcher 21 and the quaternary catcher 22. A cyclone-type dust collecting mechanism is provided inside the tertiary catcher 21. A base portion 22l is provided in the middle portion in the left-right direction of the upper portion of the horizontal extension portion 22b. The lower end of the integrated silencer 23 is attached to the base portion 22l. The integrated silencer 23 is shielded from the inside of the horizontal extension portion 22b.

Space S1 is formed by the lower side surface of the main body portion 22a of the quaternary catcher 22, the bottom surface of the horizontal extension portion 22b, and the side surface of the lower portion 21b of the tertiary catcher 21 protruding downward from the horizontal extension portion 22b. A water-sealed pump 25 is arranged in this space S1.

The horizontal extension portion 22b is provided with an inflow port 22j into which air sent from the discharge port 25b of the water-sealed pump 25 flows in, while the main body portion 22a is provided with the above-mentioned air outlet 22d. Has been done. A seventh pipe 7g is connected to the inflow port 22j. The inflow port 22j is provided at a position relatively close to the through hole 22i, while is provided at a position relatively far from the main body portion 22a. Inside the horizontal extension portion 22b, a rectifying wall 22k for guiding the air entering from the inflow port 22j is provided. The rectifying wall 22k is an L-shaped member in a plan view, and has an outer peripheral wall of the intermediate portion 21a of the tertiary catcher 21 inserted inside the horizontal extension portion 22b and a wall portion on the front side of the horizontal extension portion 22b. It is provided to connect with. The rectifying wall 22k is provided at a position slightly offset toward the main body portion 22a with respect to the inflow port 22j in a plan view.

As shown by the two-dot chain line A1 in FIG. 7 and the two-dot chain line A2 in FIG. 8, the air entering from the inflow port 22j is formed inside the horizontal extension portion 22b with the outer peripheral wall of the intermediate portion 21a of the tertiary catcher 21. It flows through the space between the quaternary catcher 22 and the inner wall of the horizontal extension portion 22b. At this time, the rectifying wall 22k allows the air entering from the inflow port 22j to flow only in one direction around the outer peripheral wall of the intermediate portion 21a of the tertiary catcher 21. In the example of FIG. 8, in a plan view, the air entering from the inflow port 22j flows only counterclockwise around the outer peripheral wall of the intermediate portion 21a, and the clockwise flow is regulated by the rectifying wall 22k. ing. In this way, it is restricted by the rectifying wall 22k that the air entering from the inflow port 22j directly heads toward the main body 22a, passes around the outer peripheral wall of the intermediate 21a, and then heads toward the main body 22a. It has become. The air guided by the rectifying wall 22k is sent to the inside of the main body 22a through the inside of the horizontal extension 22b, and is sent to the air switching type four-way valve 24 side through the above-mentioned outlet 22d and the fifth pipe 7e. Be done.

In the present embodiment, as described above, the quaternary catcher 22 of one of the tertiary catcher 21 and the quaternary catcher 22 has a main body portion 22a and a horizontal extension portion 22b in which at least a part thereof extends in the horizontal direction from the main body portion 22a. The other tertiary catcher 21 is provided inside the horizontal extension portion 22b in a state of penetrating in the vertical direction.

According to the present embodiment, the suction device 1 can be arranged as compactly as possible to increase the storage space of the receiver tank 5, and the suction wheel 2 having an excellent weight balance can be provided. Specifically, by integrating the tertiary catcher 21 and the quaternary catcher 22, it is possible to suppress the horizontal expansion of the suction device 1 even though the quaternary catcher 22 has the horizontal extension portion 22b. .. As a result, the suction device 1 can be arranged as compactly as possible, and the storage space of the receiver tank 5 can be increased.

In addition to this, the quaternary catcher 22 can provide the horizontal extension portion 22b with the necessary functions, so that the height of the upper end can be suppressed and the center of gravity of the vehicle can be lowered, and the weight balance of the suction vehicle 2 can be maintained. be able to. Further, since the two catchers can be firmly connected to each other, the structure of the mounting portion can be simplified and the weight can be reduced as compared with the case where the two catchers are individually mounted on the chassis 3. As a result, it is possible to provide a suction wheel 2 having an excellent weight balance.

Further, the lower side surface of the main body portion 22a of one of the tertiary catcher 21 and the quaternary catcher 22, the bottom surface of the horizontal extension portion 22b, and the other protruding downward from the horizontal extension portion 22b. The water-sealed pump 25 is arranged in the space S1 formed by the side surface of the lower portion 21b of the tertiary catcher 21 of the above. As a result, the water-sealed pump 25, the tertiary catcher 21 and the quaternary catcher 22 are arranged at substantially the same position in the horizontal direction, so that the suction device 1 as a whole can be made compact by suppressing the horizontal expansion. ..

Further, since the horizontal extension portion 22b of the quaternary catcher 22 is a water tank that removes dust from the air that has passed through the water-sealed pump 25, the horizontal balance of the suction vehicle 2 can be maintained even if a large amount of water is loaded. Can be kept. When the water tank portion of the quaternary catcher 22 exists only on one side in the vehicle width direction, there is a concern that the weight balance in the vehicle width direction of the vehicle may be lost due to the increase or decrease in water. Since the horizontal extension portion 22b extends in the vehicle width direction, the occurrence of such a problem can be suppressed.

Further, the quaternary catcher 22 has a main body portion 22a extending in the vertical direction and a horizontal extension portion 22b that internally communicates with the main body portion 22a and projects horizontally from the side surface of the main body portion 22a. The extension 22b is provided with an inflow port 22j into which air from the water-sealed pump 25 flows in, while the main body 22a is provided with an air outlet 22d, and the inside of the horizontal extension 22b is provided with an air outlet 22d. A rectifying wall 22k is provided, and the rectifying wall 22k guides the air entering from the inflow port 22j to flow around the outer peripheral wall of the tertiary catcher 21 inserted inside the horizontal extension portion 22b. ..

According to this configuration, the outer peripheral wall of the tertiary catcher 21 penetrating the inside of the horizontal extension portion 22b is effectively used, and by further providing the rectifying wall 22k, the air detours as much as possible in the horizontal extension portion 22b. The dust removal function and the water recovery function of the quaternary catcher 22 can be enhanced. As a result, the suction device 1 can be compactly configured as a whole without adding a separate catcher.

The embodiments disclosed this time are exemplary in all respects and are not grounds for limited interpretation. The technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the description of the scope of claims. In addition, the technical scope of the present invention includes all modifications within the meaning and scope equivalent to the scope of claims.

In the above embodiment, the quaternary catcher 22 has a horizontal extension portion 22b which is partially extended in the horizontal direction, and the tertiary catcher 21 is provided in a state where the tertiary catcher 21 penetrates in the vertical direction inside the horizontal extension portion 22b. rice field. The present invention is not limited to this, and one of the catchers, the tertiary catcher and the quaternary catcher, has a horizontal extension portion which is at least partially extended in the horizontal direction, and the other catcher is inside the horizontal extension portion. The catcher may be provided so as to penetrate in the vertical direction. That is, the tertiary catcher may have a horizontal extension portion, and the quaternary catcher may be provided in a state of penetrating the horizontal extension portion in the vertical direction.

In the above embodiment, the water-sealed pump 25 is used as the vacuum pump, but other vacuum pumps may be used. When the water-sealed pump 25 is used as the vacuum pump, it has many advantages such as cleanliness, quietness, no metal contact, and no need for oil because water forms a part of the pump. Further, it has an advantage that it is resistant to foreign substances because there is a large gap between the impeller and the casing, and it has an advantage that it is difficult to seize because it does not operate as a pump when water is exhausted.

In the above embodiment, the washing water tank 22c is integrally provided with the quaternary catcher 22, but the washing water tank may be provided separately from the quaternary catcher 22.

Further, in the above embodiment, the integrated silencer 23 is integrally provided on the tertiary catcher 21 and the quaternary catcher 22, but the silencer may be provided separately from the tertiary catcher 21 and the quaternary catcher 22. ..

The present invention can be used for a suction wheel equipped with a suction device that presses and depressurizes the internal air of the receiver tank to generate an air flow.

1 Suction device 2 Suction wheel 5 Receiver tank 21 3rd catcher (1st catcher)
22 4th catcher (2nd catcher)
22a Main body 22b Horizontal extension 22c Washing water tank 22k Rectifying wall 25 Water-sealed pump (vacuum pump)

Claims (4)

A receiver tank that collects the objects to be collected, and
A suction wheel equipped with a suction device that presses and depressurizes the air inside the receiver tank to generate an air flow.
The suction device includes a vacuum pump, a first catcher that removes dust of air discharged from the receiver tank at the time of suction, and a second catcher that removes dust of air that has passed through the vacuum pump.
The catcher of either the first catcher or the second catcher has a main body portion and a horizontal extension portion at least a part extending in the horizontal direction from the main body portion, and the inside of the horizontal extension portion. A suction wheel characterized in that the other catcher is provided so as to penetrate in the vertical direction. In the suction vehicle according to claim 1,
The vacuum in a space formed by the lower side surface of the main body portion of the one catcher, the bottom surface of the horizontal extension portion, and the lower side surface of the other catcher projecting downward from the horizontal extension portion. A suction wheel characterized by the placement of a pump. In the suction wheel according to claim 1 or 2.
The one catcher is the second catcher, and the horizontal extension portion is a suction wheel provided with a water tank for removing dust from air passing through the vacuum pump. In the suction vehicle according to claim 3,
The second catcher has the main body portion extending in the vertical direction and the horizontal extension portion that communicates with the main body portion internally and projects horizontally from the side surface of the main body portion.
The horizontal extension portion is provided with an inflow port into which air from the vacuum pump flows in, while the main body portion is provided with an air outlet.
A rectifying wall is provided inside the horizontal extension portion, and the air entering from the inflow port is inserted into the inside of the horizontal extension portion by the rectifying wall on the outer peripheral wall of the first catcher. A suction car characterized by being guided to flow around.

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