A novel suction nozzle assembly for sanitation vehicle and sanitation vehicle

Abstract

A novel suction nozzle assembly for a sanitation vehicle and a sanitation vehicle, wherein the suction nozzle assembly includes at least two independently operable suction nozzles, the two suction nozzles being tightly connected, the suction nozzles having a lateral air inlet on a side panel away from their own suction pipes, and the front baffle of the suction nozzle being made of two layers of soft material. The present invention can achieve a suction nozzle assembly without a low-wind-speed dead zone in the middle; the air intake volume on the left and right sides is increased, making it easier to push garbage laterally under the suction pipes, thereby improving the suction effect of the suction nozzle in areas away from the suction pipes; when garbage passes through the soft material of the front baffle, the comprehensive air intake opening area of ​​the front baffle is smaller, and the air intake volume is relatively less; the hardness of each layer of the soft material of the front baffle is smaller, making it easier for garbage to overcome the resistance of the front baffle and enter the interior of the suction nozzle; under the same fan speed and power, the comprehensive suction capacity of the suction nozzle is stronger; or in other words, under the premise of the same comprehensive suction force of the suction nozzle, the fan speed and power are lower, and the fuel consumption and noise of the sanitation vehicle are lower.

Description

Technical Field

[0001] The present invention relates to the field of road cleaning equipment, in particular to a novel suction nozzle assembly for a sanitation vehicle and a sanitation vehicle using the suction nozzle assembly. Background Art

[0002] The suction nozzle assembly is one of the most critical components of sanitation vehicles, directly impacting the vehicle's suction efficiency, fuel consumption, and noise. The suction nozzle assembly in this article refers to those used in road sweepers, wash and sweepers, vacuum trucks, dry sweepers, and their variants. These vehicles all utilize a centrifugal fan to generate negative pressure for suction and waste collection. This term specifically includes nozzles with two or more suction tubes.

[0003] In the existing technical solutions, the nozzle assembly with double straws generally adopts the following technical solutions, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown:

[0004] Figure 1 This is the left side view (vertical to the side panel) of the existing sanitation vehicle nozzle assembly;

[0005] Figure 2 This is a three-dimensional view of the existing sanitation vehicle nozzle assembly (left rear direction, looking down);

[0006] Figure 3 This is a three-dimensional view of the existing sanitation vehicle nozzle assembly (left side down, looking up);

[0007] Figure 4 It is a front view of the existing sanitation vehicle nozzle assembly and a schematic diagram of the airflow on both sides (perpendicular to the front baffle direction).

[0008] The suction nozzle assembly includes an upper cover plate 21, a front baffle plate 22, a rear baffle plate 23, a left baffle plate, a right baffle plate, a suction pipe 3, a matching suspension and dragging system, and a support system. All baffle plates are connected in a specific order and fixed to the upper cover plate. The support system is fixed to the upper cover plate or the baffle plate and has rollers. The baffle plates and upper cover plate form a semi-enclosed continuous cavity. Two suction pipes are arranged on the left and right sides of the upper cover plate, connecting the suction pipes to the interior of the suction nozzle and communicating with the cavity. During operation, the entire suction nozzle assembly is lowered and supported on the ground by rollers, ensuring a fixed gap between the baffle plates and the ground. The centrifugal fan rotates, drawing air from the suction nozzle through the suction pipes, creating a negative pressure in the cavity. Air, dust, and garbage on the road surface are sucked into the cavity through this gap. Driven by the airflow, the dust and garbage move laterally within the cavity to the bottom of the suction pipes, rising through the pipes and settling inside the trash bin. The suction nozzle assembly is connected to the vehicle chassis via a suspension and drag system, moving forward with the vehicle to continuously vacuum the road surface. To allow large pieces of trash, such as beverage bottles and broken bricks, to enter the cavity, the nozzle cavity has a certain height (usually 8 to 10 cm). Trash is carried by the high-speed airflow, and the airflow velocity is generally proportional to the suction force. Therefore, the higher the airflow velocity, the greater the suction force in the corresponding area.

[0009] The suction nozzle assembly of the prior art solution has the following three problems.

[0010] Question 1: The nozzle assembly has a low wind speed dead zone in the middle, such as Figure 4 As shown in the middle AAA area, the airflow velocity in the middle area is relatively low, resulting in relatively poor suction. The semi-enclosed cavity formed by the baffle and upper cover is a single, fully connected cavity, with the two suction pipes connecting to the cavity on either side. This results in uneven airflow distribution within the cavity, with the highest velocity and suction below the pipes. In the middle section of the cavity between the two pipes, airflow near the left pipe flows to the left, while airflow near the right pipe flows to the right. This creates a dead zone of zero airflow near the center of the cavity and a surrounding area of ​​low airflow. In this area, the airflow and suction forces are essentially the same on both sides, and the air velocity and suction forces are also relatively low. Consequently, high-density debris (such as stones and small pieces of iron) entering this area experiences a small lateral force, resulting in a low lateral movement velocity and difficulty moving laterally below the pipes within a limited timeframe. The suction nozzle assembly moves forward with the vehicle. If the garbage cannot be moved under the suction pipe in time, it will escape from the nozzle assembly through the gap between the tailgate and the ground. Existing cleaning and vacuuming vehicles have a typical problem: the area below the two suction pipes is relatively clean, while the garbage in the middle of the vehicle (near the area below the chassis drive shaft, also in the area between the two suction pipes) is not easily sucked clean, and garbage is often missed.

[0011] Regarding this issue, some people have tried the following improvements, but the effects are not obvious and even bring side effects:

[0012] The first solution is to open one or two elongated air inlet slots 211 in the middle of the upper cover of the nozzle assembly along the front-to-back direction (see Figure 2 , Figure 3 , Figure 4 ) , some air is introduced from the upper cover into the center of the nozzle assembly cavity. This air increases the lateral airflow within the cavity and increases the lateral thrust. However, due to the cavity's height, this airflow is still introduced from above. A large part of this airflow moves laterally along the upper part of the cavity. The air thrust does not actually act on the garbage on the ground below the cavity, so the effect of promoting lateral movement of garbage in the center of the cavity is not very good.

[0013] The second solution is to directly increase the speed and power of the centrifugal fan of the sanitation vehicle, which improves the suction force of the nozzle assembly as a whole. However, the disadvantage is that the sanitation vehicle has greater power, greater fuel consumption, and greater noise, while the low wind speed dead zone in the middle of the nozzle assembly cannot be eliminated.

[0014] Problem 2: Larger garbage is not easy to enter the nozzle cavity, and the overall suction force of the nozzle assembly is not strong. The front baffle of the existing nozzle is made of a layer of rubber skin or rubber sheet. The hardness of the rubber sheet needs to consider two factors:

[0015] First, the rubber sheet should be as soft as possible. When the vehicle is operating, the suction nozzle moves forward relative to the garbage. A rubber sheet with a lower hardness is softer, and garbage can more easily overcome the deformation force of the rubber sheet and enter the cavity of the suction nozzle.

[0016] Second, the rubber sheet must be hard enough. When the vehicle is operating, the high-speed airflow acts on the rubber sheet to generate a backward thrust. The rubber sheet should be as small as possible to avoid deformation to ensure a small gap at a constant height from the ground. If the rubber sheet is too soft and deforms significantly under the action of the high-speed airflow, the opening at the front of the nozzle will be too large, and relatively more air will enter the suction pipe from the front of the nozzle. The air entering the cavity from the left and right sides and from the rear gap will be relatively reduced. The reduction in lateral airflow will make it difficult for garbage far away from the suction pipe to reach the bottom of the suction pipe with the airflow, which will also reduce the overall dust collection effect of the nozzle assembly.

[0017] Because the above two requirements for the hardness of the rubber sheet are contradictory, the reality is that we can only strike a balance between them. The rubber sheet is neither very soft nor very hard, so large pieces of garbage are not easy to pass through the rubber sheet into the cavity of the suction nozzle, and often accumulate in front of the front baffle of the suction nozzle. The gap between the front baffle and the ground is also relatively large, which relatively reduces the air intake on the left, right and rear sides of the suction nozzle. The garbage entering the cavity is not easy to move horizontally and reach the bottom of the straw in time, so it leaks out from the gap on the rear side of the suction nozzle, resulting in poor suction.

[0018] Question 3: Regardless of whether the garbage is large or small, when the garbage supports the rubber sheet and enters the cavity, the ground clearance of the rubber sheet will increase significantly, which will increase the air intake on the front side and reduce the air intake on the left, right and rear sides. Similarly, the comprehensive dust suction capacity of the nozzle assembly will be reduced.

[0019] Combined with the above analysis, it can be seen that in order to improve the comprehensive dust collection ability of the suction nozzle assembly, improvements are needed in the following aspects: 1) Relatively increase the lateral airflow inside the cavity, especially increase the lateral airflow in the suction nozzle cavity below the middle transmission shaft of the vehicle, away from the suction pipe side. More importantly, increase the lateral airflow in the middle area of ​​the cavity near the bottom height, so that more air can blow the garbage horizontally close to the ground, so as to truly increase the lateral movement speed of the garbage on the bottom surface, so that the garbage can move to the bottom of the suction pipe as quickly as possible and be sucked into the trash can in time, thereby improving the dust collection effect of the middle part of the suction nozzle assembly; 2) Reduce the resistance of the garbage through the rubber plate of the front baffle, so that the garbage can more easily push the front baffle into the internal cavity of the suction nozzle, and avoid the accumulation of garbage on the outside of the front baffle of the suction nozzle;

[0020] 3) When the garbage lifts up the front baffle rubber plate and enters the suction nozzle cavity, the gap between the front rubber plate and the ground should be reduced as much as possible, and the air flow on the front side should be kept stable as much as possible, thereby ensuring the stability of the air flow on the left, right and rear sides, and ensuring that the comprehensive suction force of the suction nozzle is stable. Summary of the Invention

[0021] The present invention aims to provide a novel suction nozzle assembly for sanitation vehicles and a sanitation vehicle, which can achieve the following advantages:

[0022] 1) The nozzle assembly includes two independently working nozzles, ensuring that there is no low-speed dead zone in the middle of the nozzle assembly;

[0023] 2) When the garbage passes through the soft material of the front baffle, the comprehensive air intake opening area of ​​the front baffle is smaller, and the air intake in front of the suction nozzle is relatively less;

[0024] 3) The side panels of the nozzle are equipped with air inlets, which increase the air intake on the left and right sides of the nozzle;

[0025] 4) The air intake of the front and rear baffles of the suction nozzle is reduced, while the air intake on the left and right sides is increased, making it easier to push garbage horizontally (left and right) to the bottom of the suction pipe in the horizontal air duct inside the suction nozzle, thereby improving the horizontal transportation capacity of garbage and thus improving the suction effect of the suction nozzle in areas far away from the suction pipe;

[0026] 5) The soft material of each front baffle is less hard, so garbage can more easily overcome the resistance of the front baffle of the nozzle and enter the interior of the nozzle;

[0027] 6) Under the same fan speed and power, the comprehensive dust suction capacity of the suction nozzle is stronger; in other words, under the premise of the same comprehensive suction force of the suction nozzle, the fan speed and power are lower, and the fuel consumption and noise of the sanitation vehicle are lower.

[0028] In order to achieve the above object, the present invention adopts the following technical solutions:

[0029] A novel suction nozzle assembly for a sanitation vehicle is characterized in that the suction nozzle assembly includes at least two independently operable suction nozzles, referred to as a first suction nozzle and a second suction nozzle, wherein no roller brush is located between the two suction nozzles during operation, the two suction nozzles cannot rotate relative to each other, and the two suction nozzles are not handheld suction nozzles; each suction nozzle includes an upper cover plate 21, a front baffle plate 22, a rear baffle plate 23, and a side panel 24; the upper cover plate 21, the front baffle plate 22, the rear baffle plate 23, and the side panel 24 together form a suction nozzle cavity with an open lower end;

[0030] The transverse air ducts 25 inside the two suction nozzles are staggered front to back.

[0031] Preferably, each of the two suction nozzles is connected to at least one suction pipe 3; each suction nozzle has two side panels 24. The two suction nozzles can be arranged in parallel front and back, or arranged at a certain angle relative to each other.

[0032] Preferably, the direction of the outer upper edge straight line 241 of the side panel 24 of the first suction nozzle is defined as the X-axis direction, the front baffles 22 of the two suction nozzles are not at the same X-coordinate, and the rear baffles 23 of the two suction nozzles are not at the same X-coordinate; the two suction nozzles are closely connected, or the projections of the two suction nozzle assemblies along the X-axis direction partially overlap in the middle; the two suction nozzles are arranged parallel front and back, or the two suction nozzles are arranged in a herringbone shape front and back.

[0033] Preferably, the direction of the straight line 241 of the outer upper edge of the side panel 24 of the first suction nozzle is defined as the X-axis direction, and the suction nozzle assembly is viewed from the direction perpendicular to the side panel 24 of the first suction nozzle. In the middle of the suction nozzle assembly, the two suction nozzles partially overlap front and back, that is, the rear baffle 23 of the first suction nozzle and the front baffle 22 of the second suction nozzle overlap in the X-axis direction.

[0034] Preferably, the first nozzle has a transverse air inlet 1th-A 26 on the side panel away from the suction pipe, corresponding to an air flow area A1. The second nozzle has a transverse air inlet 2th-C 28 on the side panel away from the suction pipe, corresponding to an air flow area C1. These transverse air inlets 1th-A 26 and 2th-C 28 are located at the lower end of the side panel, close to the ground, directing airflow from ground level into the nozzle's transverse air duct 25. The presence of A1 and C1 significantly increases the transverse air intake volume and velocity at the side of the nozzle away from the suction pipe, thereby improving suction at that location.

[0035] Preferably, the first nozzle has a transverse air inlet 1st-B 27 on the side panel near its own suction pipe, corresponding to an air flow area of ​​B1, and setting A1>B1. The second nozzle has a transverse air inlet 2nd-D 29 on the side panel near its own suction pipe, corresponding to an air flow area of ​​D1, and setting C1>D1. If the nozzle assembly has a third or more nozzles, the same principle applies.

[0036] Preferably, the front baffles 22 of the two nozzles are constructed from two or more layers of soft material, with an acute angle between the front baffles 22 and the upper cover 21. These two or more layers of soft material are spaced apart at a distance, making them less rigid than the rubber sheets used in existing nozzles. They are more susceptible to bending and deformation under stress, making it easier for small pieces of trash, such as stones, to pass into the nozzles. The soft material can be a thin rubber sheet secured to the upper cover 21 with a plywood. If worn, the fixings can be manually readjusted to ensure the required ground clearance for the front baffles 22.

[0037] Preferably, a flow area adjustment device 31 is provided on one, some, or all of the straws 3 to reduce or even completely close the airflow passage of the corresponding straw 3, thereby reducing or eliminating the suction force of the corresponding straw 3. This improves the suction force of the remaining straws.

[0038] Preferably, the flow area adjustment device 31 is a cap-shaped sealing gasket with a detachable interface 32 in the middle of the straw. The opening and closing of the straw is controlled by placing or removing the cap-shaped sealing gasket at the detachable interface 32. If the cap-shaped sealing gasket has a small hole, the airflow of the straw is correspondingly reduced; if the cap-shaped sealing gasket has no small hole, the straw is completely closed. Alternatively, the flow area adjustment device 31 is a manual or electronically controlled regulating valve, which can manually or remotely control the flow area and opening and closing of the straw 3.

[0039] Preferably, the rear baffle is composed of two or more layers of baffles, which are parallel to each other and spaced a certain distance apart. From the inside to the outside, that is, from the nozzle cavity to the outside of the nozzle, each layer of the rear baffle is defined as the first layer of the rear baffle, the second layer of the rear baffle, and so on. The space between the first layer of the rear baffle and the second layer of the rear baffle forms a vortex air chamber. During operation, the airflow is sucked into the nozzle cavity from the outside of the nozzle rear baffle. During this process, the airflow enters the vortex air chamber from the gap below the second layer of the rear baffle, generating a vortex airflow similar to the rotating effect of a roller brush, and then enters the nozzle cavity through the gap below the first layer of the rear baffle. If dust particles accidentally miss the nozzle cavity and pass through the gap below the first layer of the rear baffle into the vortex air chamber, the vortex airflow similar to the effect of a roller brush will roll up the dust particles again and send them back to the nozzle cavity along the airflow, thereby achieving a better dust collection effect.

[0040] The present invention also provides a sanitation vehicle, comprising a novel suction nozzle assembly for a sanitation vehicle provided by the present invention, wherein the two suction nozzles are located below the vehicle body, respectively on the left and right sides of the vehicle body; the working width of the suction nozzle assembly is not less than the entire width of the vehicle body; the working width of the suction nozzle assembly is not less than 1.8 meters; when the two suction nozzles are arranged in a herringbone configuration, the portion between the two suction nozzles is close to the front of the vehicle, and the portions on both sides are close to the rear of the vehicle; the sanitation vehicle also includes a vehicle body, a suspension and towing system, a support system, and a trash can, wherein the support system is placed on the suction nozzle assembly, supporting the suction nozzle assembly to maintain a set distance from the ground, the suspension and towing system connects the suction nozzle assembly and the vehicle body together, the suspension and towing system is used to drive the suction nozzle assembly and the support system to rise and fall, and to drag the suction nozzle assembly and the support system to move with the vehicle, the suction nozzle assembly is used to collect garbage and transfer the garbage to the trash can of the sanitation vehicle through a suction pipe. The support system includes rollers that support the suction nozzle assembly to roll along the ground.

[0041] Preferably, the two suction nozzles are fixedly connected into a whole by a structural member, share a suspension system, and can only rise or fall at the same time; or the two suction nozzles each have a suspension system and can rise or fall independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is the left side view (vertical to the side panel) of the existing sanitation vehicle nozzle assembly;

[0043] Figure 2 This is a three-dimensional view of the existing sanitation vehicle nozzle assembly (left rear direction, looking down);

[0044] Figure 3 This is a three-dimensional view of the existing sanitation vehicle nozzle assembly (left side down, looking up);

[0045] Figure 4This is a front view of the existing sanitation vehicle nozzle assembly and a schematic diagram of the airflow on both sides (perpendicular to the front baffle direction);

[0046] Figure 5 This is a left side view (vertical to the side panel) of a nozzle in Example 1;

[0047] Figure 6 3D view of a nozzle in Example 1 (left rear direction, top view);

[0048] Figure 7 3D view of a nozzle in Example 1 (left side, bottom direction, looking up);

[0049] Figure 8 1 is a left side view (vertical to the side panel) of the nozzle assembly of Example 1;

[0050] Figure 9 3D view of the nozzle assembly of Example 1 (left rear direction, top view);

[0051] Figure 10 1 is a top view of the nozzle assembly of Example 1 (perpendicular to the upper cover plate, looking down);

[0052] Figure 11 2 is a top view of the nozzle assembly of Example 2 (perpendicular to the upper cover plate, looking down);

[0053] Figure 12 2. This is a left side view (perpendicular to the side panel) of the nozzle assembly of Example 3;

[0054] Figure 13 3D view of the nozzle assembly of Example 3 (left front direction, top view);

[0055] Figure 14 This is a bottom view of the nozzle assembly of Example 3 and a schematic diagram of the airflow on both sides of the nozzle (perpendicular to the upper cover, looking up);

[0056] Figure 15 1 is a top view of the nozzle assembly of Example 3 (perpendicular to the upper cover plate, looking down);

[0057] Figure 16 This is the installation position of the flow area adjustment device of Example 4 on the sanitation vehicle;

[0058] Figure 17 is a three-dimensional view of the flow area regulating device of Example 4;

[0059] Figure 18 Schematic diagram of vortex airflow similar to the rotating effect of the roller brush in Example 5.

[0060] In the picture:

[0061] 21. Upper cover; 211. Upper cover air inlet slot; 22. Front baffle; 23. Rear baffle; 24. Side panel; 241. Outer upper edge straight line; 25. Horizontal air duct; 26. Horizontal air inlet 1th-A; 27. Horizontal air inlet 1th-B; 28. Horizontal air inlet 2th-C; 29. ​​Horizontal air inlet 2th-D; 3. Suction pipe; 31. Flow area adjustment device; 32. Disconnectable interface. DETAILED DESCRIPTION

[0062] The following is a further detailed description of a novel suction nozzle assembly for a sanitation vehicle and a sanitation vehicle of the present invention.

[0063] The present invention will be described in more detail below with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. It should be understood that those skilled in the art may modify the invention described herein while still achieving the advantageous effects of the invention. Therefore, the following description should be understood as a general guide for those skilled in the art and not as a limitation of the present invention.

[0064] For the sake of clarity, not all features of actual embodiments are described. In the following description, well-known functions and structures are not described in detail because they would obscure the present invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific goals, such as adapting from one embodiment to another to accommodate system or business constraints. Furthermore, it should be understood that such development work may be complex and time-consuming, but is nevertheless a routine undertaking for those skilled in the art.

[0065] In order to make the purpose and features of the present invention more obvious and easy to understand, the specific embodiments of the present invention are further described below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0066] See Figures 1 to 17 , further illustrate the specific implementation methods of the present invention.

[0067] The present invention aims to provide a novel suction nozzle assembly for sanitation vehicles and a sanitation vehicle, which can achieve:

[0068] 1) When the garbage passes through the soft material of the front baffle, the comprehensive air intake opening area of ​​the front baffle is smaller, and the air intake in front of the suction nozzle is relatively less;

[0069] 2) The side panels of the nozzle are equipped with air inlets, which increase the air intake on the left and right sides of the nozzle;

[0070] 3) The air intake of the front and rear baffles of the suction nozzle is reduced, while the air intake on the left and right sides is increased, making it easier to push garbage horizontally (left and right) to the bottom of the suction pipe in the horizontal air duct inside the suction nozzle, thereby improving the horizontal transportation capacity of garbage and thus improving the suction effect of the suction nozzle in areas far away from the suction pipe;

[0071] 4) The soft material of each front baffle is less hard, so garbage can more easily overcome the resistance of the front baffle of the nozzle and enter the interior of the nozzle;

[0072] 5) Under the same fan speed and power, the comprehensive dust suction capacity of the suction nozzle is stronger; in other words, under the premise of the same comprehensive suction force of the suction nozzle, the fan speed and power are lower, and the fuel consumption and noise of the sanitation vehicle are lower.

[0073] In order to achieve the above object, the present invention adopts the following technical solutions:

[0074] A new type of suction nozzle assembly for sanitation vehicles is characterized in that the suction nozzle assembly includes at least two suction nozzles that can work independently. During operation, there is no roller brush between the two suction nozzles, the two suction nozzles cannot rotate relative to each other, and the two suction nozzles are not handheld suction nozzles; each suction nozzle includes an upper cover plate 21, a front baffle 22, a rear baffle 23, and a side panel 24; the upper cover plate 21, the front baffle 22, the rear baffle 23, and the side panel 24 together form a suction nozzle cavity with an open lower end.

[0075] Each of the suction nozzles is connected to at least one suction tube 3; the transverse air ducts 25 inside the two suction nozzles are staggered front to back; each suction nozzle has two side panels 24. The two suction nozzles can be arranged in parallel front to back, or arranged at a certain angle relative to each other.

[0076] The direction of the outer upper edge straight line 241 of the side panel 24 of the suction nozzle is defined as the X-axis direction, the front baffles 22 of the two suction nozzles are not at the same X-coordinate, and the rear baffles 23 of the two suction nozzles are not at the same X-coordinate; the two suction nozzles are closely connected, or the projection of the suction nozzle assembly along the X-axis direction partially overlaps left and right in the middle; the two suction nozzles are arranged parallel to each other front and back, or the two suction nozzles are arranged in a herringbone shape front and back.

[0077] Define the direction of the straight line 241 of the outer upper edge of the side panel 24 of the suction nozzle as the X-axis direction. Look at the suction nozzle assembly from the direction perpendicular to the suction nozzle side panel 24. In the middle of the suction nozzle assembly, the two suction nozzles partially overlap front and back, that is, the rear baffle 23 of the front suction nozzle and the front baffle 22 of the rear suction nozzle overlap in the X-axis direction.

[0078] The first nozzle has a transverse air inlet 1th-A26 on the side panel away from the suction pipe, corresponding to an air flow area of ​​A1. The second nozzle has a transverse air inlet 2th-C28 on the side panel away from the suction pipe, corresponding to an air flow area of ​​C1. These transverse air inlets 1th-A26 and 2th-C28 are located at the lower end of the side panel, close to the ground, directing airflow from ground level into the nozzle's transverse air duct 25. The presence of A1 and C1 significantly increases the transverse air intake volume and velocity at the side of the nozzle away from the suction pipe, improving suction at that location.

[0079] The first nozzle has a horizontal air inlet 1st to B27 on the side panel near its own suction pipe. The corresponding air flow area is B1, and A1 is set to be greater than B1. The second nozzle has a horizontal air inlet 2nd to D29 on the side panel near its own suction pipe. The corresponding air flow area is D1, and C1 is set to be greater than D1. If the nozzle assembly has a third or more nozzles, the same analogy applies.

[0080] The front baffle 22 of the nozzle is constructed from two or more layers of soft material, forming an acute angle with the upper cover 21. These two or more layers of soft material are spaced apart and are less rigid than the rubber sheets used in existing nozzles. They are more susceptible to bending and deformation under stress, making it easier for small pieces of trash, such as rocks, to pass into the nozzle. The soft material can be a thin rubber sheet secured to the upper cover 21 with a plywood. If worn, the fixings can be manually readjusted to ensure the required ground clearance for the front baffle 22.

[0081] A flow area adjustment device 31 is provided on one, part of, or all of the straws 3 to reduce or even completely close the airflow passage of the corresponding straw 3, thereby reducing or eliminating the suction force of the corresponding straw 3. This improves the suction force of the remaining straws.

[0082] The flow area adjustment device 31 is a cap-shaped sealing gasket with a detachable interface 32 in the middle of the straw. The opening and closing of the straw is controlled by placing or removing the cap-shaped sealing gasket at the detachable interface 32. If the cap-shaped sealing gasket has a small hole, the airflow of the straw is correspondingly reduced; if the cap-shaped sealing gasket has no small hole, the straw is completely closed. Alternatively, the flow area adjustment device 31 is a manual or electronically controlled regulating valve, which can manually or remotely control the flow area and opening and closing of the straw 3.

[0083] The rear baffle of the suction nozzle is a two-layer or multi-layer baffle, and the ground clearance of the rear baffle is smaller than that of the existing solution.

[0084] The present invention also provides a sanitation vehicle, comprising a novel suction nozzle assembly for a sanitation vehicle provided by the present invention, wherein the two suction nozzles are located below the vehicle body, respectively on the left and right sides of the vehicle body; the working width of the suction nozzle assembly is not less than the entire width of the vehicle body; the working width of the suction nozzle assembly is not less than 1.8 meters; when the two suction nozzles are arranged in a herringbone configuration, the portion between the two suction nozzles is close to the front of the vehicle, and the portions on both sides are close to the rear of the vehicle; the sanitation vehicle also includes a vehicle body, a suspension and towing system, a support system, and a trash can, wherein the support system is placed on the suction nozzle assembly, supporting the suction nozzle assembly to maintain a set distance from the ground, the suspension and towing system connects the suction nozzle assembly and the vehicle body together, the suspension and towing system is used to drive the suction nozzle assembly and the support system to rise and fall, and to drag the suction nozzle assembly and the support system to move with the vehicle, the suction nozzle assembly is used to collect garbage and transfer the garbage to the trash can of the sanitation vehicle through a suction pipe. The support system includes rollers that support the suction nozzle assembly to roll along the ground.

[0085] The two suction nozzles are fixedly connected into a whole through a structural member and share a suspension system, and can only be raised or lowered at the same time; or the two suction nozzles each have a suspension system and can be raised or lowered independently.

[0086] Figure 5 This is a left side view (vertical to the side panel) of a nozzle in Example 1;

[0087] Figure 6 3D view of a nozzle in Example 1 (left rear direction, top view);

[0088] Figure 7 It is a three-dimensional view of a suction nozzle in Example 1 (left side lower direction, looking up).

[0089] In Example 1, the suction nozzle has a two-layer front baffle 22, which has better sealing performance than the single-layer baffle design of the existing solution, and the air volume entering the suction nozzle from the front baffle direction is less; the front baffle 22 is a soft rubber plate, and the hardness of the plate is softer than that of the existing solution, so that garbage can more easily overcome the resistance of the front baffle and enter the suction nozzle; the rubber plate of the front baffle is fixed to the upper cover plate 21 with a plywood, and the height is adjustable; the angle DD between the front baffle 22 and the upper cover plate 21 is an acute angle of approximately 45 degrees; the suction nozzle has a two-layer rear baffle 23, which is adjustable in height. The overall thickness of the two-layer rear baffle is thicker than that of the existing solution, and the ground clearance is lower than that of the existing solution, so the air volume entering the suction nozzle from the rear baffle direction is less. The rear baffle 23 is fixed to the upper cover plate 21 with a structural member;

[0090] The nozzle is flanked by a side panel. The side panel away from the nozzle's suction pipe features a relatively larger lateral air inlet (1th-A 26); the side panel closer to the nozzle's suction pipe features a relatively smaller lateral air inlet (1th-B 27). Both lateral air inlets are located on the side panels, facing the nozzle's lateral air duct and close to the ground. These two lateral air inlets create a stronger lateral airflow within the nozzle's internal duct, with similar lateral airflow speeds on both sides. This ensures sufficient lateral airflow to quickly transport waste from both sides of the nozzle to beneath the suction pipes, thereby increasing suction on both sides of the nozzle. This addresses the suction shortcomings of existing nozzles and improves the nozzle's overall suction capacity. A special-shaped gradient tube structure is used between the suction pipe and the upper cover.

[0091] Figure 8 1 is a left side view (vertical to the side panel) of the nozzle assembly of Example 1;

[0092] Figure 9 3D view of the nozzle assembly of Example 1 (left rear direction, top view);

[0093] Figure 10 This is a top view of the nozzle assembly of Example 1 (vertical to the upper cover plate, looking down).

[0094] In Example 1, the nozzle assembly comprises two independently operable nozzles, arranged parallel to each other. In the center of the nozzle assembly, the two nozzles overlap slightly. This prevents debris from falling between the two nozzles as the sanitation vehicle moves forward. The two nozzles are fixedly connected by structural members to form a single unit, share a common suspension system, and can only be raised or lowered simultaneously. Alternatively, the two nozzles each have their own suspension system, allowing them to be raised or lowered independently.

[0095] Figure 11 This is a top view of the suction nozzle assembly of Example 2 (vertical to the upper cover plate, looking down).

[0096] In Example 2, the suction nozzle assembly is composed of two independently operable suction nozzles. The two suction nozzles are arranged in a herringbone shape, with the middle portion closer to the front of the vehicle relative to the two sides, that is, the side of the suction nozzle away from the straw is closer to the front, and the side of the suction nozzle close to the straw is closer to the back. This arrangement of the suction nozzles diverts the garbage in the middle of the suction nozzle assembly to the left and right. During the forward movement of the front baffle and the rear baffle inside the suction nozzle, the garbage in contact with the middle portion will be pushed toward the straws on both sides, which is more conducive to the garbage in the middle quickly reaching the bottom of the straws and improving the comprehensive suction force of the suction nozzle. In addition, with this layout, the two suction straws can be in the same position in the front-to-back direction of the vehicle, which is more conducive to the connection between the suction nozzle assembly and the garbage bin straw.

[0097] Figure 12 2. This is a left side view (perpendicular to the side panel) of the nozzle assembly of Example 3;

[0098] Figure 13 3D view of the nozzle assembly of Example 3 (left front direction, top view);

[0099] Figure 14 This is a bottom view of the nozzle assembly of Example 3 and a schematic diagram of the airflow on both sides of the nozzle (perpendicular to the upper cover, looking up);

[0100] Figure 15 This is a top view of the nozzle assembly of Example 3 (vertical to the upper cover plate, looking down).

[0101] In Example 3, the nozzle assembly consists of two independently operable nozzles. Viewed perpendicular to the nozzle side panels, the two nozzles partially overlap in the middle of the assembly. The projection of the front nozzle's rear baffle 23 overlaps the projection of the rear nozzle's front baffle 22 in the X-axis. This approach results in a shorter, more compact nozzle assembly in the X-direction. Each nozzle has two front and two rear baffles made of soft material. A first type of lateral air inlet is provided on the side panel facing away from its suction pipe, while a second type of lateral air inlet is provided on the side panel facing the suction pipe. Both lateral air inlets are located on the side panels facing the lateral air duct and close to the ground. The area of ​​the first type of lateral air inlet is larger than that of the second type of lateral air inlet. This design ensures greater lateral airflow and approximately equal wind speed on both sides of each nozzle. Several reinforcing ribs are positioned appropriately on the upper cover to ensure the overall rigidity of the nozzle assembly.

[0102] Figure 16 This is the installation position of the flow area adjustment device of Example 4 on the sanitation vehicle;

[0103] Figure 17 It is a three-dimensional view of the flow area regulating device of Example 4.

[0104] In Example 4, the suction nozzle assembly is arranged in front of the rear wheel of the sanitation vehicle. The suction nozzle assembly has two suction pipes, which are arranged on both sides of the chassis and are connected to the two suction pipes of the sanitation vehicle's garbage bin respectively. At the disconnectable interface 32, the left suction pipe is installed with a flow area adjustment device 31, that is, a cap-shaped sealing gasket, so that the left suction pipe is completely closed, and the corresponding left suction nozzle has no suction force. The entire suction force of the fan acts on the right suction nozzle through the right suction pipe. Therefore, when the fan speed remains unchanged, the right suction nozzle obtains greater suction force. This unilateral operation mode is more suitable for sucking garbage in the corners of the roadside. If a small hole is processed in the middle of the cap-shaped sealing gasket, the suction force of the suction nozzle can be adjusted. The cap-shaped sealing gasket can be placed on or removed every time the garbage bin is lifted.

[0105] Figure 18Schematic diagram of vortex airflow similar to the rotating effect of the roller brush in Example 5.

[0106] In Example 5, the rear baffle is composed of two or more layers of baffles, which are parallel to each other and spaced a certain distance apart. From the inside to the outside, that is, from the nozzle cavity to the outside of the nozzle, each layer of the rear baffle is defined as the first layer of the rear baffle, the second layer of the rear baffle, and so on. The space between the first layer of the rear baffle and the second layer of the rear baffle forms a vortex air chamber. During operation, the airflow is sucked into the nozzle cavity from the outside of the nozzle rear baffle. During this process, the airflow enters the vortex air chamber from the gap below the second layer of the rear baffle, generating a vortex airflow similar to the rotating effect of a roller brush, and then enters the nozzle cavity through the gap below the first layer of the rear baffle. If dust particles accidentally miss the nozzle cavity and pass through the gap below the first layer of the rear baffle into the vortex air chamber, the vortex airflow similar to the effect of a roller brush will roll up the dust particles again and send them back to the nozzle cavity along the airflow, thereby achieving a better dust collection effect.

[0107] In summary, the present invention provides a novel suction nozzle assembly for sanitation vehicles and a sanitation vehicle, which can achieve:

[0108] 1) When the garbage passes through the soft material of the front baffle, the comprehensive air intake opening area of ​​the front baffle is smaller, and the air intake in front of the suction nozzle is relatively less;

[0109] 2) The side panels of the nozzle are equipped with air inlets, which increase the air intake on the left and right sides of the nozzle;

[0110] 3) The air intake of the front and rear baffles of the suction nozzle is reduced, while the air intake on the left and right sides is increased, making it easier to push garbage horizontally (left and right) to the bottom of the suction pipe in the horizontal air duct inside the suction nozzle, thereby improving the horizontal transportation capacity of garbage and thus improving the suction effect of the suction nozzle in areas far away from the suction pipe;

[0111] 4) The soft material of each front baffle is less hard, so garbage can more easily overcome the resistance of the front baffle of the nozzle and enter the interior of the nozzle;

[0112] 5) Under the same fan speed and power, the comprehensive dust suction capacity of the suction nozzle is stronger; in other words, under the premise of the same comprehensive suction force of the suction nozzle, the fan speed and power are lower, and the fuel consumption and noise of the sanitation vehicle are lower.

[0113] The above embodiments are only used to illustrate the inventive concept of the present invention, and are not intended to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention using this concept should fall within the scope of protection of the present invention.

Claims

1. A new type of suction nozzle assembly for sanitation vehicles, characterized by: The nozzle assembly comprises at least two nozzles capable of working independently, respectively referred to as a first nozzle and a second nozzle. When in operation, there is no roller brush between the two nozzles, and the two nozzles are not handheld nozzles. Each nozzle comprises an upper cover plate (21), a front baffle plate (22), a rear baffle plate (23), and a side panel (24). The upper cover plate (21), the front baffle plate (22), the rear baffle plate (23), and the side panel (24) together form a nozzle cavity with an open lower end. The transverse air ducts (25) inside the two suction nozzles are staggered front to back; Each of the two suction nozzles is connected to at least one suction pipe (3); each suction nozzle has two side panels (24); The first suction nozzle has a transverse air inlet 1th-A (26) on the side panel away from the suction pipe thereof, and the corresponding air flow area is A1; the second suction nozzle has a transverse air inlet 2th-C (28) on the side panel away from the suction pipe thereof, and the corresponding air flow area is C1; the transverse air inlet 1th-A (26) and the transverse air inlet 2th-C (28) are arranged at the lower end of the side panel, close to the ground, and introduce air flow from the ground height into the transverse air duct (25) of the suction nozzle from the outside; The first suction nozzle has a transverse air inlet 1th-B (27) on the side panel close to its own suction pipe, and the corresponding air flow area is B1, and A1>B1 is set; for the second suction nozzle, there is a transverse air inlet 2th-D (29) on the side panel close to its own suction pipe, and the corresponding air flow area is D1, and C1>D1 is set.

2. A novel suction nozzle assembly for sanitation vehicles as described in claim 1, wherein the direction of the outer upper edge straight line (241) of the side panel (24) of the first suction nozzle is defined as the X-axis direction, the front baffles (22) of the two suction nozzles are not at the same X-coordinate, and the rear baffles (23) of the two suction nozzles are not at the same X-coordinate; the two suction nozzles are closely connected, or the projections of the two suction nozzle assemblies along the X-axis direction have a portion of left and right overlap in the middle; the two suction nozzles are arranged in parallel front and back, or the two suction nozzles are arranged in a herringbone shape front and back.

3. A new type of suction nozzle assembly for sanitation vehicles as described in claim 1, wherein the direction of the outer upper edge straight line (241) of the side panel (24) of the first suction nozzle is defined as the X-axis direction, and the suction nozzle assembly is viewed from a direction perpendicular to the first suction nozzle side panel (24). In the middle of the suction nozzle assembly, the two suction nozzles partially overlap front and back, that is, the rear baffle (23) of the first suction nozzle and the front baffle (22) of the second suction nozzle overlap in the X-axis direction.

4. A novel suction nozzle assembly for sanitation vehicles as described in claim 1, wherein the front baffles (22) of the two suction nozzles are made of two or more layers of soft material, and the angle between the front baffle (22) and the upper cover (21) is an acute angle.

5. A novel suction nozzle assembly for sanitation vehicles as described in claim 1 is provided with a flow area adjustment device (31) on one, part of, or all of the suction pipes (3), which can reduce the air flow channel of the suction pipe (3) or even completely close it, so that the suction force of the suction pipe (3) is reduced or completely eliminated.

6. A novel suction nozzle assembly for sanitation vehicles as described in claim 5, wherein the flow area adjustment device (31) is a cap-shaped sealing gasket, and a disconnectable interface (32) is provided in the middle of the suction pipe, and the on-off of the suction pipe is controlled by placing or removing the cap-shaped sealing gasket at the interface (32); or the flow area adjustment device (31) is a manual or electrically controlled regulating valve, which can manually or remotely control the flow area and on-off of the suction pipe (3).

7. A sanitation vehicle, characterized in that: The sanitation vehicle comprises a novel sanitation vehicle suction nozzle assembly according to any one of claims 1 to 6.

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