Positive and negative pressure switching system for sanitation vehicle and sanitation vehicle

Abstract

The present invention belongs to the field of garbage collection, and specifically provides a positive and negative pressure switching system of a sanitation vehicle and a sanitation vehicle, wherein the positive and negative pressure switching system includes a feeding switching valve and a ventilation switching valve; the feeding switching valve is provided with a feeding port and a positive pressure feeding port and a negative pressure feeding port that can be switched with each other; the feeding port can only be connected to one of the positive pressure feeding port and the negative pressure feeding port, the positive pressure feeding port is connected to a fan, and the first air outlet of the fan is connected to a garbage bin; the negative pressure feeding port is connected to the garbage bin; the air outlet of the garbage bin is connected back to the air inlet of the fan through the ventilation switching valve. The system realizes the simultaneous use of positive and negative pressure feeding modes on the same vehicle through the switching of the valve body channel, which effectively improves the versatility of the vehicle and the garbage suction and collection effect.

Description

Technical Field

[0001] The invention relates to the field of garbage collection, and in particular to a positive and negative pressure switching system of a sanitation vehicle and the sanitation vehicle. Background Art

[0002] As the urbanization process accelerates and urban environmental standards are further improved, the requirements for the multi-function and working effect of sanitation vehicles are becoming more and more stringent. At present, sanitation vehicles are subdivided into various models in terms of function realization methods, such as road sweepers, leaf collectors, etc. However, according to the working principle of the fan duct, they are roughly divided into two categories, namely positive pressure feeding and negative pressure feeding. These two independent methods may each include two feeding methods: suction cup feeding and mechanical arm feeding. At present, the same vehicle can only have one of the feeding methods, namely positive pressure feeding or negative pressure feeding. Positive pressure feeding and negative pressure feeding are also different in dust filtration and emission methods. Positive pressure feeding is suitable for light garbage such as leaves, such as leaf collectors; negative pressure feeding is suitable for blocky and heavy garbage (sludge, soil, stones, water bottles, etc.), such as road sweepers. Due to the single functionality of the vehicle and the different dust filtration and emission methods, the vehicle cannot be used universally under different road conditions, which further leads to increased equipment costs and reduced applicability of sanitation vehicles. In addition, the current sanitation vehicle feeding port is a pure suction structure, which has a poor suction effect on garbage such as leaves stuck to the ground and piled up. Therefore, it is urgent to invent a sanitation vehicle with a positive and negative pressure switching sanitation vehicle feeding system and a positive and negative pressure universal dust filtering and emission device. Summary of the invention

[0003] In view of the above problems, the present invention provides a positive and negative pressure switching system for a sanitation vehicle and a sanitation vehicle. The system realizes both positive and negative pressure feeding modes on the same vehicle through switching of the valve body channel, which effectively improves the versatility of the vehicle and improves the garbage suction effect.

[0004] A positive and negative pressure switching system for a sanitation vehicle comprises a feed switching valve and a ventilation switching valve; the feed switching valve is provided with a feed port and a positive pressure feed port and a negative pressure feed port which can be switched with each other; the feed port can only be connected with either a positive pressure feed port or a negative pressure feed port, the positive pressure feed port is connected with a fan, and a first air outlet of the fan is connected with a garbage bin; the negative pressure feed port is connected with a garbage bin, and the garbage bin is provided with an air outlet.

[0005] Preferably, the ventilation switching valve includes a ventilation inlet, a ventilation blower and a ventilation exhaust, the ventilation inlet is connected to the air outlet of the garbage bin, the ventilation blower is connected to the back-blowing mechanism of the feeding system, and the ventilation exhaust is back-connected to the air inlet of the fan. The ventilation inlet can only be connected to one of the ventilation blower or the ventilation exhaust.

[0006] Preferably, a cyclone dust collector is connected above the garbage bin, an upper outlet of the cyclone dust collector is connected to a return air chamber, and the return air chamber is connected to a ventilation inlet.

[0007] Preferably, a fine material trash bin is provided at the lower outlet of the cyclone dust collector.

[0008] Preferably, there are two groups of cyclone dust collectors, which are symmetrically installed above the garbage bin, and a cyclone feed channel is provided between the two groups of cyclone dust collectors.

[0009] Preferably, the fan is further provided with a second air outlet, and the first air outlet and the second air outlet are interlocked.

[0010] Preferably, the feed switching valve and the ventilation switching valve both include a shell, a valve core is rotatably connected inside the shell, the valve core includes a feed port and a discharge port that are interconnected, a positive pressure feed port and a negative pressure feed port are arranged on the shell, the valve core is connected to a driving mechanism, and driven by the driving mechanism, the opening and closing of the feed port, the connection and disconnection of the discharge port and the positive pressure feed port, and the connection and disconnection of the discharge port and the negative pressure feed port are realized.

[0011] Preferably, the feeding switching valve comprises a suction cup feeding switching valve and a robotic arm feeding switching valve; the suction cup feeding switching valve and the robotic arm feeding switching valve are connected to the positive pressure feeding port and the negative pressure feeding port through their respective switching channels.

[0012] Preferably, the suction cup feeding switching valve and the mechanical arm feeding switching valve are both provided with a garbage suction and picking up port, wherein a back-blowing port is provided on the side of the garbage suction and picking up port of the suction cup feeding switching valve, and the back-blowing port is connected to the ventilation blowing port.

[0013] The present invention also discloses a sanitation vehicle, which has the positive and negative pressure switching system as described above.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention concentrates the positive and negative pressure feeding systems on one vehicle, allowing the vehicle to choose positive pressure or negative pressure operation according to the operating conditions, and enables the centrifugal dust removal to also meet the dust filtering and emission under positive and negative pressure conditions, thereby enhancing the versatility of the vehicle under different road conditions, and making great contributions and technological progress to urban environmental governance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The overall structure of the present invention Figure 1 ;

[0018] Figure 2 The overall structure of the present invention Figure 2 ;

[0019] Figure 3 This is a diagram of the closed state of the feed port of the feed switching valve of the present invention;

[0020] Figure 4 It is a structural state diagram of the feeding switching valve of the present invention when the feeding port is connected with the positive pressure feeding port;

[0021] Figure 5 It is a structural state diagram of the feeding switching valve of the present invention when the feeding port is connected with the negative pressure feeding port;

[0022] Figure 6 It is a structural state diagram of the ventilation switching valve of the present invention when the ventilation air inlet and the ventilation air outlet are connected;

[0023] Figure 7 It is a structural state diagram of the ventilation switching valve of the present invention when the ventilation inlet and the ventilation outlet are connected;

[0024] Figure 8 It is the internal structure diagram of the cyclone dust collector of the present invention;

[0025] Fig. 9 This is a structural diagram of the valve core and gear connection of the present invention;

[0026] In the figure, 1. fine material garbage bin, 2. return air chamber, 3. negative pressure feeding channel, 4. ventilation outlet channel, 5. positive pressure feeding channel, 6. ventilation exhaust channel, 7. backblowing channel, 8. suction cup feeding port, 9. suction cup feeding channel, 10. robot arm feeding channel, 11. robot arm feeding port, 12. positive pressure feeding port, 13. negative pressure feeding port, 14. ventilation switching valve, 15. suction cup feeding switching valve, 16. robot arm feeding switching valve, 17. feeding port, 18. ventilation inlet, 19. ventilation blowing port, 20. ventilation exhaust port, 21. second air outlet, 22. first air outlet. DETAILED DESCRIPTION

[0027] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0028] like Figure 1-2As shown, the present invention discloses a positive and negative pressure switching system for a sanitation vehicle, the system comprising a valve group consisting of a ventilation switching valve 14, a suction cup feeding switching valve 15 and a mechanical arm feeding switching valve 16, such as Fig. 9 As shown, the three switching valves all use the motor to drive the gear transmission system, and then the gear transmission system drives the valve core to rotate to achieve channel switching. Figure 3-5 As shown, the valve cores of the suction cup feeding switching valve 15 and the robot arm feeding switching valve 16 are both communicating structures with an upper cylindrical opening and a lower fan-shaped opening. A positive pressure feeding port 12 and a negative pressure feeding port 13 are respectively arranged on the shell outside the valve core. The fan-shaped opening is used to connect the two ports at the same time (that is, to connect the positive pressure feeding port 12 and the feed port 17 at the same time or to connect the negative pressure feeding port 13 and the feed port 17 at the same time). The motor rotates as needed and drives the valve core to rotate to the corresponding position through the gear transmission mechanism to realize the connection between the feed port 17 and the positive pressure feeding port 12 or the negative pressure feeding port 13.

[0029] like Figure 6-7 As shown, the ventilation switching valve 14 includes a ventilation inlet 18, a ventilation blowing port 19 and a ventilation exhaust port 20. A channel is set in the valve core of the ventilation switching valve. The valve core is driven by a motor to rotate to achieve communication between the ventilation inlet 18 and the ventilation blowing port 19 or communication between the ventilation inlet 18 and the ventilation exhaust port 20.

[0030] like Figure 1 , Figure 2 and Figure 8 As shown, the air inlet of the fan is connected to the positive pressure feeding channel 5 and the ventilation exhaust channel 6. The fan is provided with two air outlets, wherein the first air outlet 22 is connected to the inlet of the garbage bin for power input in the positive pressure feeding mode. The second air outlet 21 is connected to the atmosphere for exhaust in the negative pressure feeding mode.

[0031] The positive and negative pressure switching system disclosed in the present invention specifically has the following six working modes:

[0032] 1. Suction cup feeding in positive pressure mode.

[0033] In this mode, the position state of the suction cup feeding switching valve 15 is as follows: Figure 4 As shown, the position state of the robot feeding switching valve 16 is as follows Figure 3 As shown, at this time, the ground garbage enters the feed port 17 through the suction cup feed port 8 and the suction cup feed channel 9, and then enters the positive pressure feed channel 5 through the internal channel of the suction cup feed switching valve 15 through the positive pressure feed port 12, and enters the garbage bin through the air inlet of the fan and the first air outlet 22. After being roughly filtered in the garbage bin, the fine garbage and air are mixed and enter the feed port of the cyclone dust collector. Figure 8As shown by the solid arrows, the garbage after dust removal by the cyclone dust collector enters the fine material dust bin 1 from the lower outlet of the cyclone dust collector, and the air enters the return air chamber 2 from the upper outlet of the cyclone dust collector, and enters the ventilation switching valve 14 through the ventilation outlet channel 4 and the ventilation inlet 18. At this time, the position state of the ventilation switching valve 14 is as shown in FIG. Figure 6 As shown, the ventilation air inlet 18 is connected with the ventilation air blowing port 19, and enters the back-blowing port on the side of the suction cup through the back-blowing channel 7 to blow away the garbage adhering to the ground and improve the garbage suction and picking effect.

[0034] 2. Robotic arm feeding in positive pressure mode.

[0035] In this mode, the position state of the suction cup feeding switching valve 15 is as follows: Figure 3 As shown, the position state of the robot feeding switching valve 16 is as follows Figure 4 As shown, at this time, the ground garbage enters the feeding port 17 through the robot arm feeding port 11 and the robot arm feeding channel 10, then enters the positive pressure feeding port 12 through the internal channel of the robot arm feeding switching valve 16, and then enters the positive pressure feeding channel 5, and enters the garbage bin through the air inlet and the first air outlet 22 of the fan. After coarse filtration in the garbage bin, the fine garbage and air are mixed and enter the feeding port of the cyclone dust collector. Figure 8 As shown by the solid arrows, the garbage after dust removal by the cyclone dust collector enters the fine material dust bin 1 from the lower outlet of the cyclone dust collector, and the air enters the return air chamber 2 from the upper outlet of the cyclone dust collector, and enters the ventilation switching valve 14 through the ventilation outlet channel 4 and the ventilation inlet 18. At this time, the position state of the ventilation switching valve 14 is as shown in FIG. Figure 6 As shown, the ventilation air inlet 18 is connected with the ventilation air outlet 19, and enters the back-blowing port on the side of the suction cup through the back-blowing channel 7, playing the role of exhausting the fan pipeline circulation system.

[0036] 3. The suction cup and the robotic arm feed the materials simultaneously in the positive pressure mode.

[0037] In this mode, the position states of the suction cup feeding switching valve 15 and the robot arm feeding switching valve 16 are as follows: Figure 4 At this time, the ground garbage enters the feed port 17 through the suction cup feed port 8 and the suction cup feed channel 9, and then enters the positive pressure feed channel 5 through the positive pressure feed port 12 through the internal channel of the suction cup feed switching valve 15; at the same time, the ground garbage enters the feed port 17 through the robot arm feed port 11 and the robot arm feed channel 10, and then enters the positive pressure feed channel 5 through the internal channel of the robot arm feed switching valve 16 through the positive pressure feed port 12. After the two garbages are collected in the positive pressure feed channel 5, they enter the garbage bin through the air inlet and the first air outlet 22 of the fan. After being roughly filtered in the garbage bin, the fine garbage and air are mixed and enter the feed port of the cyclone dust collector. Figure 8As shown by the solid arrows, the garbage after dust removal by the cyclone dust collector enters the fine material dust bin 1 from the lower outlet of the cyclone dust collector, and the air enters the return air chamber 2 from the upper outlet of the cyclone dust collector, and enters the ventilation switching valve 14 through the ventilation outlet channel 4 and the ventilation inlet 18. At this time, the position state of the ventilation switching valve 14 is as follows: Figure 6 As shown, the ventilation air inlet 18 is connected with the ventilation air blowing port 19, and enters the back-blowing port on the side of the suction cup through the back-blowing channel 7 to blow away the garbage adhering to the ground and improve the garbage suction and picking effect.

[0038] 4. Suction cup feeding in negative pressure mode.

[0039] In this mode, the position state of the suction cup feeding switching valve 15 is as follows: Figure 5 As shown, the position state of the robot feeding switching valve 16 is as follows Figure 3 As shown, at this time, the ground garbage enters the feed port 17 through the suction cup feed port 8 and the suction cup feed channel 9, and then enters the negative pressure feed channel 3 through the internal channel of the suction cup feed switching valve 15 through the negative pressure feed port 13, and then enters the garbage bin. After coarse filtration in the garbage bin, the fine garbage and air are mixed and enter the feed port of the cyclone dust collector. Figure 8 As shown by the dotted arrows, the garbage after dust removal by the cyclone dust collector enters the fine material dust bin 1 from the lower outlet of the cyclone dust collector, and the air enters the return air chamber 2 from the upper outlet of the cyclone dust collector, and enters the ventilation switching valve 14 through the ventilation outlet channel 4 and the ventilation inlet 18. At this time, the position state of the ventilation switching valve 14 is as follows: Figure 7 As shown, the ventilation inlet 18 is connected to the ventilation outlet 20, enters the fan through the ventilation exhaust channel 6, and then is discharged into the atmosphere from the second outlet 21 of the fan.

[0040] 5. Robotic arm feeding in negative pressure mode.

[0041] In this mode, the position state of the suction cup feeding switching valve 15 is as follows: Figure 3 As shown, the position state of the robot feeding switching valve 16 is as follows Figure 5 As shown, at this time, the ground garbage enters the feeding port 17 through the robot arm feeding port 11 and the robot arm feeding channel 10, and then enters the negative pressure feeding channel 3 through the internal channel of the robot arm feeding switching valve 16 through the negative pressure feeding port 13, and then enters the garbage bin. After coarse filtration in the garbage bin, the fine garbage and air are mixed and enter the feeding port of the cyclone dust collector. Figure 8 As shown by the dotted arrows, the garbage after dust removal by the cyclone dust collector enters the fine material dust bin 1 from the lower outlet of the cyclone dust collector, and the air enters the return air chamber 2 from the upper outlet of the cyclone dust collector, and enters the ventilation switching valve 14 through the ventilation outlet channel 4 and the ventilation inlet 18. At this time, the position state of the ventilation switching valve 14 is as follows: Figure 7As shown, the ventilation inlet 18 is connected to the ventilation outlet 20, enters the fan through the ventilation exhaust channel 6, and then is discharged into the atmosphere from the second outlet 21 of the fan.

[0042] 6. The suction cup and the robotic arm feed the materials simultaneously in the negative pressure mode.

[0043] In this mode, the position states of the suction cup feeding switching valve 15 and the robot arm feeding switching valve 16 are as follows: Figure 5 At this time, the ground garbage enters the feed port 17 through the suction cup feed port 8 and the suction cup feed channel 9, and then enters the negative pressure feed channel 3 through the internal channel of the suction cup feed switching valve 15 through the negative pressure feed port 13; at the same time, the ground garbage enters the feed port 17 through the robot arm feed port 11 and the robot arm feed channel 10, and then enters the negative pressure feed channel 3 through the internal channel of the robot arm feed switching valve 16. The two types of garbage are collected in the negative pressure feed channel 3 and enter the garbage bin. After being roughly filtered in the garbage bin, the fine garbage and air are mixed and enter the feed port of the cyclone dust collector. Figure 8 As shown by the dotted arrows, the garbage after dust removal by the cyclone dust collector enters the fine material dust bin 1 from the lower outlet of the cyclone dust collector, and the air enters the return air chamber 2 from the upper outlet of the cyclone dust collector, and enters the ventilation switching valve 14 through the ventilation outlet channel 4 and the ventilation inlet 18. At this time, the position state of the ventilation switching valve 14 is as follows: Figure 7 As shown, the ventilation inlet 18 is connected to the ventilation outlet 20, enters the fan through the ventilation exhaust channel 6, and then is discharged into the atmosphere from the second outlet 21 of the fan.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positive and negative pressure switching system for a sanitation vehicle, characterized in that: It includes a feeding switching valve and a ventilation switching valve (14); The feed switching valve comprises a housing, a valve core is rotatably connected in the housing, and the valve core comprises a feed port (17) and a discharge port which are interconnected; a positive pressure feed port (12) and a negative pressure feed port (13) are arranged on the housing, and the valve core is connected to a driving mechanism, and driven by the driving mechanism, the feed port (17) is opened and closed, the discharge port is connected and disconnected with the positive pressure feed port (12), and the discharge port is connected and disconnected with the negative pressure feed port (13); The positive pressure feeding port (12) and the negative pressure feeding port (13) of the feeding switching valve can be switched with each other; the feeding port (17) can only be connected to one of the positive pressure feeding port (12) and the negative pressure feeding port (13); The ventilation switching valve (14) comprises a ventilation air inlet (18), a ventilation air outlet (19) and a ventilation air outlet (20), and the ventilation air inlet (18) can only be connected to one of the ventilation air outlet (19) or the ventilation air outlet (20); The positive pressure feeding port (12) is connected to a fan, the air inlet of the fan is connected to the positive pressure feeding channel (5) and the ventilation and exhaust channel (6), and the fan is provided with two air outlets, wherein the first air outlet (22) is connected to the inlet of the garbage bin and is used for power input in the positive pressure feeding mode; the second air outlet (21) is connected to the atmosphere and is used for exhaust in the negative pressure feeding mode; the ventilation and exhaust port (20) is back-connected to the air inlet of the fan; the first air outlet (22) and the second air outlet (21) are interlocked; The negative pressure feeding port (13) is connected to a garbage bin, and the garbage bin is provided with an air outlet; the ventilation air inlet (18) is connected to the air outlet of the garbage bin; The ventilation air blowing port (19) is connected to a back-blowing mechanism of the feeding system.

2. A positive and negative pressure switching system for a sanitation vehicle according to claim 1, characterized in that: A cyclone dust collector is connected above the dust bin, an upper outlet of the cyclone dust collector is connected to a return air chamber (2), and the return air chamber (2) is connected to a ventilation air inlet (18).

3. A positive and negative pressure switching system for a sanitation vehicle according to claim 2, characterized in that: A fine material trash box (1) is provided at the lower outlet of the cyclone dust collector.

4. A positive and negative pressure switching system for a sanitation vehicle according to claim 2, characterized in that: The cyclone dust collectors are in two groups, which are symmetrically installed above the dustbin, and a cyclone feeding channel is arranged between the two groups of cyclone dust collectors.

5. The positive and negative pressure switching system of a sanitation vehicle according to claim 1, characterized in that: The feed switching valve comprises a suction cup feed switching valve (15) and a mechanical arm feed switching valve (16); the suction cup feed switching valve (15) and the mechanical arm feed switching valve (16) are connected to the positive pressure feed port (12) and the negative pressure feed port (13) via respective switching channels.

6. A positive and negative pressure switching system for a sanitation vehicle according to claim 5, characterized in that: The suction cup feeding switching valve (15) and the mechanical arm feeding switching valve (16) are both provided with a garbage suction port, wherein a back-blowing port is provided on the side of the garbage suction port of the suction cup feeding switching valve (15), and the back-blowing port is connected to the ventilation blowing port (19).

7. A sanitation vehicle, characterized in that: The sanitation vehicle has a positive and negative pressure switching system according to any one of claims 1 to 6.

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