Fan series connection pneumatic system for washing and sweeping vehicle

Abstract

The utility model provides a fan series pneumatic system for a cleaning and sweeping vehicle, which comprises a centrifugal fan positioned on the outer side of a garbage can of the corresponding cleaning and sweeping vehicle and comprising a volute and a centrifugal impeller vertically and rotatably arranged in the volute and driven by a first motor, a centrifugal air suction opening of the volute is connected with a negative pressure opening of the garbage can, a centrifugal air outlet is located in the bottom and arranged downwards, and the bottom of the volute and the centrifugal air outlet are arranged from top to bottom in an arc transition mode. And the axial flow fan comprises a machine shell erected on the outer wall of the garbage can through a supporting frame and an axial flow impeller transversely and rotatably arranged in the machine shell and driven by a second motor, an axial flow air suction opening of the axial flow fan is connected with the centrifugal air outlet, and the axial flow air outlet is connected with an exhaust cylinder. And the centrifugal fan and the axial flow fan are connected in series, so that the air pressure and the air volume can be improved, and vibration generated by the centrifugal fan and the axial flow fan can be transmitted to the garbage can through the supporting frame and then dispersed so as to reduce noise.

Description

Technical Field

[0001] The utility model relates to the field of fan structures, in particular to a fan series pneumatic system for a washing and sweeping vehicle. Background Art

[0002] The existing garbage bin pneumatic systems of sweepers generally use centrifugal fans as the pneumatic source for negative pressure suction and garbage collection. Centrifugal fans are machines that increase gas pressure and deliver gas simultaneously. Specifically, they use high-speed rotating impellers to accelerate the gas and change the flow direction, and then use the diffuser outlet duct to slow down the gas to form pressure energy.

[0003] It can be seen that the centrifugal fan has the advantage of high wind pressure, which makes the suction cylinder equipped with the garbage bin have sufficient suction force. However, the centrifugal fan has the disadvantage of small air volume, and its application in the washing and sweeping vehicle also has the following defects: Figure 1 The bottom of the centrifugal fan volute is concave and lower than the air outlet, which is prone to accumulation of sewage and sludge, causing impeller oscillation and wear, motor bearing damage, motor burnout, and affecting the dynamic balance of the fan. In addition, most existing centrifugal fans are installed on the sub-frame, resulting in a long gas flow path at the air intake, large wind resistance, and low fan efficiency.

[0004] The purpose of this utility model is to design a fan series pneumatic system for a washing and sweeping vehicle in response to the problems existing in the above-mentioned prior art. Utility Model Content

[0005] In response to the problems existing in the above-mentioned prior art, the present invention provides a fan-in-series pneumatic system for a washing and sweeping vehicle, which can effectively solve the problems existing in the above-mentioned prior art.

[0006] The technical solution of the utility model is:

[0007] A fan series pneumatic system for a washing and sweeping vehicle, comprising:

[0008] A centrifugal fan is located outside the garbage bin of the corresponding washing and sweeping vehicle, the centrifugal fan including a volute, a centrifugal impeller vertically rotatable within the volute and driven by a first motor, a centrifugal air intake of the volute connected to the negative pressure port of the garbage bin, a centrifugal air outlet located at the bottom and facing downward, and an arc-shaped transition from top to bottom between the bottom of the volute and the centrifugal air outlet;

[0009] The axial flow fan includes a casing mounted on the outer wall of the trash can through a support frame, an axial flow impeller arranged in the casing and driven by a second motor for horizontal rotation, the axial flow air intake of the axial flow fan is connected to the centrifugal air outlet, and the axial flow air outlet is connected to the exhaust duct.

[0010] Furthermore, the washing and sweeping vehicle also includes a water tank located in front of the volute, the narrow side of the volute is perpendicular to the opposite sides of the garbage bin and the water tank, the centrifugal air intake is arranged at the rear of the volute, the first motor is arranged at the front of the volute and the driving end passes through the volute and is connected to the centrifugal impeller, the centrifugal fan, axial flow fan, and exhaust duct are distributed in sequence from top to bottom, and the lower end of the exhaust duct is curved toward the side close to the garbage bin to form an exhaust end horizontally corresponding to the bottom of the garbage bin.

[0011] Furthermore, the centrifugal air outlet is connected to the axial flow air intake through an air outlet tube, the inner diameter of the air outlet tube gradually decreases from top to bottom, and the centrifugal air intake is connected to the negative pressure port through an air inlet tube, and the inner diameter of the air inlet tube gradually decreases towards the direction close to the centrifugal air intake.

[0012] Furthermore, a plurality of vibration-damping cavities extending vertically are circumferentially spaced apart on the side wall of the air outlet tube, and a plurality of damping particles are filled in the plurality of vibration-damping cavities.

[0013] Furthermore, the inner bottom of the trash can is separated by a partition to form an exhaust area, and a number of support rods are vertically arranged between the inner bottom of the trash can and the partition. The front opening of the exhaust area corresponds to the exhaust end and openings are arranged on the left and right sides.

[0014] Furthermore, a filter is provided in the trash can at the inner end of the negative pressure port, and two first flanges, two second flanges, two third flanges and two fourth flanges are respectively locked between the air inlet and the negative pressure port, between the centrifugal air outlet and the upper end of the air outlet, between the lower end of the air outlet and the axial flow suction port, and between the axial flow suction port and the upper end of the exhaust pipe, and sealing gaskets are respectively provided between the two first flanges, between the two second flanges, between the two third flanges and between the two fourth flanges.

[0015] Therefore, the present invention provides the following effects and / or advantages:

[0016] 1. The centrifugal air outlet of the volute of the centrifugal fan is arranged at the bottom and facing downward, and an arc-shaped transition is arranged between the bottom of the volute and the centrifugal air outlet from top to bottom, so as to avoid the bottom of the volute being concave below the centrifugal air outlet, so that the sewage and sludge can slide down along the arc-shaped transition and be discharged together through the centrifugal air outlet, thereby avoiding the accumulation of sewage and sludge in the volute, which leads to impeller oscillation and wear, motor bearing damage, motor burnout, and affecting the dynamic balance of the fan, thereby improving the stability and service life of the centrifugal fan; and, by moving the installation position of the centrifugal fan upward, the centrifugal air inlet of the volute can be directly connected to the negative pressure port of the garbage bin, so as to avoid the long gas flow path of the centrifugal air inlet, which leads to large wind resistance and low efficiency of the centrifugal fan. The emergence of the centrifugal fan ensures the working wind pressure to ensure the negative pressure suction effect of the garbage bin; on this basis, the axial flow fan is connected to the centrifugal air outlet of the centrifugal fan, so that the centrifugal fan and the axial flow fan are arranged in series. The large flow suction of the axial flow fan can improve the working efficiency of the centrifugal fan, make up for the defect of the small air volume of the centrifugal fan, and improve the overall working efficiency of the pneumatic system. The suction effect of the axial flow fan can also improve the sliding efficiency of the sewage and sludge in the volute. At the same time, not only can the centrifugal fan be supported by the axial flow fan, but the vibration generated by the centrifugal fan and axial flow fan during operation can also be transmitted to the garbage bin through the support frame and then dispersed, thereby reducing the noise generated by the centrifugal fan and axial flow fan during operation.

[0017] 2. Rotate the existing volute installation method by 90° until the narrow surface is perpendicular to the opposite sides of the trash bin and the water tank, and combine the downward-facing centrifugal air outlet and the arc-shaped bend at the lower end of the exhaust pipe to form a horizontal exhaust end corresponding to the bottom of the trash bin. After the air in the trash bin is drawn out by the centrifugal fan, it passes downward through the centrifugal air outlet and the axial flow fan in sequence, and then turns in the exhaust air sky and is discharged horizontally to the bottom of the trash bin. Under the premise of reducing the space occupied by the centrifugal fan, the exhaust direction of the pneumatic system is ensured to remain unchanged, and the air is discharged horizontally toward the bottom of the trash bin to avoid blowing up the garbage on the ground and causing secondary pollution.

[0018] 3. By providing a number of vertically extending vibration-damping cavities at circumferential intervals on the sidewall of the air outlet, each of which is filled with damping particles, the vibration between the volute and the casing during operation of the pneumatic system is dissipated through friction between the damping particles in the vibration-damping cavities, effectively creating a significant vibration-damping effect. This prevents the connection between the volute, air outlet, and casing from loosening or even detaching due to excessive vibration, thereby improving the strength and stability of the connection between the three. Furthermore, the provision of the vibration-damping cavities increases the structural strength of the air outlet, thereby enhancing its support for the volute.

[0019] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a structural diagram of a centrifugal fan used in an existing washing and sweeping vehicle.

[0021] Figure 2 The figure is a structural diagram of a washing and sweeping vehicle.

[0022] Figure 3 This is a structural diagram of the fan series pneumatic system.

[0023] Figure 4 for Figure 2 Schematic diagram of the front view of the partial structure after removing the front end and water tank.

[0024] Figure 5 This is a structural diagram of a punching bag.

[0025] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the following embodiments and accompanying drawings:

[0027] refer to Figure 1-6 , a fan series pneumatic system for a washing and sweeping vehicle, comprising:

[0028] A centrifugal fan 1 is located outside the trash bin 71 of the corresponding washing and sweeping vehicle 7. The centrifugal fan 1 includes a volute 11, a centrifugal impeller vertically rotatable within the volute 11 and driven by a first motor 12. The centrifugal air intake 111 of the volute 11 is connected to the negative pressure port 711 of the trash bin 71, and the centrifugal air outlet 112 is located at the bottom and arranged downward. An arc-shaped transition is provided between the bottom of the volute 11 and the centrifugal air outlet 112 from top to bottom. Specifically, a suction cylinder is provided through the rear bottom of the trash bin 71, which communicates with the outside world and the interior of the trash bin 71 and has a suction nozzle at the lower end for sucking up trash.

[0029] The axial flow fan 2 comprises a housing 21 mounted on the outer wall of the trash bin 71 via a support frame 3, an axial flow impeller rotatably mounted within the housing 21 and driven by a second motor. The axial flow air intake 211 of the axial flow fan 2 is connected to the centrifugal air outlet 112, and the axial flow air outlet 212 is connected to the exhaust duct 4. Specifically, the support frame 3 is fixedly mounted around the outer wall of the housing 21 and then screwed and locked to the front outer wall of the trash bin 71.

[0030] The above structure is set up, by arranging the centrifugal air outlet 112 of the volute 11 of the centrifugal fan 1 at the bottom and facing downward, and arranging the arc-shaped transition between the bottom of the volute 11 and the centrifugal air outlet 112 from top to bottom, thereby avoiding that the bottom of the volute 11 is concave below the centrifugal air outlet 112, so that sewage and sludge can slide down along the arc-shaped transition and be discharged together through the centrifugal air outlet 112, avoiding the accumulation of sewage and sludge in the volute 11, which leads to impeller oscillation and wear, motor bearing damage, motor burning, and affecting the dynamic balance of the fan, thereby improving the stability and service life of the centrifugal fan 1; and, by moving the installation position of the centrifugal fan 1 upward, the centrifugal air intake 111 of the volute 11 can be directly connected to the negative pressure port 711 of the garbage bin 71, so as to avoid the long gas flow path of the centrifugal air intake 111, which leads to large wind resistance and centrifugal wind In the event of low efficiency of the centrifugal fan 1, the working wind pressure of the centrifugal fan 1 is ensured to ensure the negative pressure suction effect of the garbage bin 71; on this basis, the axial flow fan 2 is connected to the centrifugal air outlet 112 of the centrifugal fan 1, so that the centrifugal fan 1 and the axial flow fan 2 are arranged in series. The large flow suction of the axial flow fan 2 can improve the working efficiency of the centrifugal fan 1, make up for the defect of the small air volume of the centrifugal fan 1, and improve the overall working efficiency of the pneumatic system. The suction effect of the axial flow fan 2 can also improve the sliding efficiency of the sewage and sludge in the volute 11. At the same time, not only can the centrifugal fan 1 be supported by the axial flow fan 2, but the vibration generated by the centrifugal fan 1 and the axial flow fan 2 during operation can also be transmitted to the garbage bin 71 through the support frame 3 and then dispersed, thereby reducing the noise generated by the centrifugal fan 1 and the axial flow fan 2 during operation.

[0031] In order to discharge the air from the volute 11 toward the bottom of the trash bin 71 to avoid blowing up the garbage on the ground, the existing centrifugal fan 1 adopts an installation method in which the wide surface of the volute 11 is perpendicular to the trash bin 71 and the water tank 72, that is, the impeller is arranged perpendicular to the trash bin 71 and the water tank 72 and is located as a whole between the two. This causes the centrifugal fan 1 to occupy a large space during installation, compressing the capacity of the trash bin 71 and the water tank 72; therefore, in order to reduce the space occupied by the centrifugal fan 1 and increase the capacity of the trash bin 71 and the water tank 72, the cleaning and sweeping vehicle 7 also includes a The water tank 72 is located in front of the volute 11, and the narrow side of the volute 11 is perpendicular to the opposite sides of the trash bin 71 and the water tank 72. The centrifugal air intake 111 is located at the rear of the volute 11. The first motor 12 is located at the front of the volute 11 and the driving end passes through the volute 11 and is connected to the centrifugal impeller. The centrifugal fan 1, axial fan 2, and exhaust duct 4 are distributed in sequence from top to bottom, and the lower end of the exhaust duct 4 is bent in an arc toward the side close to the trash bin 71 to form an exhaust end 41 horizontally corresponding to the bottom of the trash bin 71. The existing installation method of the volute 11 is thereby rotated 90° until the narrow surface is perpendicular to the opposite sides of the trash bin 71 and the water tank 72, and combined with the downwardly arranged centrifugal air outlet 112 and the arc-shaped bend at the lower end of the exhaust tube 4 to form a horizontal exhaust end 41 corresponding to the bottom of the trash bin 71, so that the air in the trash bin 71 is drawn out by the centrifugal fan 1 and then downwardly passes through the centrifugal air outlet 112 and the axial flow fan 2 in sequence, and then passes through the exhaust air arc bend and is discharged horizontally to the bottom of the trash bin 71, so as to ensure that the exhaust direction of the pneumatic system remains unchanged while reducing the space occupied by the centrifugal fan 1, and exhausts horizontally toward the bottom of the trash bin 71 to avoid blowing up the garbage on the ground and causing secondary pollution.

[0032] In order to improve the operating efficiency of the centrifugal fan 1, the centrifugal air outlet 112 is connected to the axial flow air intake 211 via the air outlet duct 5. The inner diameter of the air outlet duct 5 gradually decreases from top to bottom. The centrifugal air intake 111 is connected to the negative pressure port 711 via the air inlet duct 6. The inner diameter of the air inlet duct 6 gradually decreases as it approaches the centrifugal air intake 111. The arrangement of the air outlet duct 5 and the air inlet duct 6 gradually increases the air outlet area of the centrifugal fan 1 and gradually decreases the air inlet area. This in turn gradually increases the air pressure at the centrifugal air intake 111 and gradually decreases at the centrifugal air outlet 112. This increases the pressure difference between the centrifugal air intake 111 and the centrifugal air outlet 112 of the centrifugal fan 1 and improves the negative pressure extraction capability of the centrifugal fan 1.

[0033] In order to improve the connection strength between the volute 11, the air outlet 5, and the casing 21, the side wall of the air outlet 5 is circumferentially spaced apart with a plurality of vibration-damping cavities 51 extending up and down. A plurality of damping particles 52 are filled in the vibration-damping cavities 51. Specifically, the damping particles 52 can be iron-based spherical damping particles 52. In other embodiments, the damping particles 52 can also be made of other metal materials. Therefore, during the operation of the pneumatic system, the vibration between the volute 11 and the casing 21 can be dissipated through the friction between the damping particles 52 in the vibration-damping cavities, effectively forming a significant vibration-damping effect, so as to prevent the connection between the volute 11, the air outlet 5, and the casing 21 from loosening or even detaching due to excessive vibration, thereby improving the connection strength and stability between the three. At the same time, the provision of the vibration-damping cavities 51 improves the structural strength of the air outlet 5, thereby improving its support strength for the volute 11.

[0034] To prevent the exhaust from the exhaust end from affecting the garbage on the ground, the inner bottom of the trash bin 71 is separated by a partition 712 to form an exhaust area 713. Several support rods 714 are vertically installed between the inner bottom of the trash bin 71 and the partition 712. The front opening of the exhaust area 713 corresponds to the exhaust end 41, and there are openings on both sides. This allows the exhaust from the exhaust end 41 to enter the exhaust area 713 and expand outward toward the left and right sides of the trash bin 71, preventing the exhaust from blowing downward and disturbing the garbage on the ground, causing secondary contamination.

[0035] Specifically, the trash bin 71 is provided with a filter screen 715 located at the inner end of the negative pressure port 711. The air inlet 6 and the negative pressure port 711, the centrifugal air outlet 112 and the upper end of the air outlet 5, the lower end of the air outlet 5 and the axial flow suction port 211, and the axial flow suction port 211 and the upper end of the exhaust duct 4 are locked by two first flanges, two second flanges, two third flanges, and two fourth flanges, respectively. Furthermore, a sealing gasket is provided between the two first flanges, the two second flanges, the two third flanges, and the two fourth flanges. Thus, the provision of the first flanges, the second flanges, the third flanges, the fourth flanges, and the sealing gasket improves the connection strength and sealing performance between the negative pressure port 711, the centrifugal air outlet 111, the centrifugal air outlet 112, the air outlet duct 5, and the exhaust duct 4.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fan-in-series pneumatic system for a washing and sweeping vehicle, characterized in that: include: A centrifugal fan (1) is located outside a garbage bin (71) of a corresponding cleaning and sweeping vehicle (7), the centrifugal fan (1) comprising a volute (11), a centrifugal impeller vertically rotatable within the volute (11) and driven by a first motor (12), a centrifugal air intake (111) of the volute (11) connected to a negative pressure port (711) of the garbage bin (71), a centrifugal air outlet (112) located at the bottom and arranged downward, and an arc-shaped transition from top to bottom between the bottom of the volute (11) and the centrifugal air outlet (112); The axial flow fan (2) comprises a housing (21) mounted on the outer wall of the trash bin (71) via a support frame (3), an axial flow impeller arranged in the housing (21) and driven by a second motor for transverse rotation, an axial flow air intake (211) of the axial flow fan (2) being connected to the centrifugal air outlet (112), and the axial flow air outlet (212) being connected to an exhaust pipe (4).

2. A fan-in-series pneumatic system for a washing and sweeping vehicle as claimed in claim 1, characterized in that: The cleaning and sweeping vehicle (7) further comprises a water tank (72) located at the front side of the volute (11), the narrow side of the volute (11) being perpendicular to the opposite sides of the trash bin (71) and the water tank (72), the centrifugal air inlet (111) being arranged at the rear of the volute (11), the first motor (12) being arranged at the front of the volute (11) and the driving end of which passes through the volute (11) and is connected to the centrifugal impeller, the centrifugal fan (1), the axial flow fan (2) and the exhaust pipe (4) being distributed in sequence from top to bottom, the lower end of the exhaust pipe (4) being bent in an arc shape toward a side close to the trash bin (71) to form an exhaust end (41) corresponding horizontally to the bottom of the trash bin (71).

3. The fan-in-series pneumatic system for a washing and sweeping vehicle according to claim 1, characterized in that: The centrifugal air outlet (112) is connected to the axial air intake (211) via an air outlet tube (5), and the inner diameter of the air outlet tube (5) gradually decreases from top to bottom. The centrifugal air intake (111) is connected to the negative pressure port (711) via an air inlet tube (6), and the inner diameter of the air inlet tube (6) gradually decreases towards the direction approaching the centrifugal air intake (111).

4. A fan-in-series pneumatic system for a washing and sweeping vehicle as claimed in claim 3, characterized in that: A plurality of vibration-damping cavities (51) extending vertically are provided at intervals in the circumferential direction on the side wall of the air outlet cylinder (5), and a plurality of damping particles (52) are filled in the plurality of vibration-damping cavities (51).

5. The fan-in-series pneumatic system for a washing and sweeping vehicle according to claim 2, characterized in that: The inner bottom of the trash box (71) is separated by a partition (712) to form an exhaust area (713). A plurality of support rods (714) are vertically arranged between the inner bottom of the trash box (71) and the partition (712). The front opening of the exhaust area (713) corresponds to the exhaust end (41) and is provided with openings on both left and right sides.

6. The fan-in-series pneumatic system for a washing and sweeping vehicle as claimed in claim 3, characterized in that: The trash bin (71) is provided with a filter (715) located at the inner end of the negative pressure port (711), and the air inlet (6) and the negative pressure port (711), the centrifugal air outlet (112) and the upper end of the air outlet (5), the lower end of the air outlet (5) and the axial flow air intake (211), and the axial flow air intake (211) and the upper end of the exhaust pipe (4) are locked respectively by two first flanges, two second flanges, two third flanges, and two fourth flanges, and sealing gaskets are respectively provided between the two first flanges, the two second flanges, the two third flanges, and the two fourth flanges.

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