Dumper pneumatic control valve

Abstract

The utility model discloses a dumper pneumatic control valve in the field of dumper hydraulic system pneumatic control, which comprises a valve body, an air inlet channel is arranged in the valve body, an air inlet, a lifting air port, a descending air port and a power takeoff air port are respectively arranged on the valve body, the air inlet is communicated with the air inlet channel, and the lifting air port is communicated with the power takeoff air port. The air inlet channel is communicated with a lifting air channel, a descending air channel and a power takeoff air channel in the valve body through a lifting air cavity, a descending air cavity and a power takeoff air cavity respectively, the lifting air channel is communicated with a lifting air port, the descending air channel is communicated with a descending air port, and the power takeoff air channel is communicated with a power takeoff air port. Through structural optimization and design change, the anti-pollution capability of the whole valve is enhanced, the structural strength is high, and the failure rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the pneumatic control field of hydraulic system of self-unloading vehicle, especially relates to a self-unloading vehicle pneumatic control valve. BACKGROUND

[0002] In recent years, with the development of self-unloading vehicle more and more fast, especially the mining wide-body self-unloading vehicle industry, the user is more and more strict to product quality requirement. Because the bad working environment of mining area (remote area, dust pollution is serious, the diurnal temperature range is big, etc.), the existing pneumatic control valve product is not satisfactory in the mining truck industry, and its problem is as follows: casting defect, damage, pneumatic control valve gas leakage, handle damage and so on, which seriously affect the normal work of the vehicle.

[0003] Therefore, in order to improve the adaptability of the pneumatic control valve in the mining wide-body vehicle industry, it is necessary to improve the structure design of the existing pneumatic control valve to improve its performance, so that it has stronger dirt resistance and higher structural strength. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a self-unloading vehicle pneumatic control valve, which can strengthen the anti-pollution ability of the whole valve, has high structural strength and low failure rate through structure optimization and design change.

[0005] The utility model aims at realizing the following: a self-unloading vehicle pneumatic control valve, comprising a valve body, an air inlet channel is arranged in the valve body, an air inlet, a lifting air inlet, a descending air inlet and a power take-off air inlet are arranged on the valve body, the air inlet is communicated with the air inlet channel, the air inlet channel is communicated with a lifting air channel, a descending air channel and a power take-off air channel in the valve body through a lifting air cavity, a descending air cavity and a power take-off air cavity respectively, the lifting air channel is communicated with the lifting air inlet, the descending air channel is communicated with the descending air inlet, and the power take-off air channel is communicated with the power take-off air inlet.

[0006] Compared with the prior art, the utility model has the beneficial effects that: the handle design of the utility model is more in line with ergonomics, and the holding feeling is better; the handle and the valve cover positioning clamping groove are made of metal material, so that the structural strength is higher; the power take-off handle adopts a dustproof design; the opening angle of the existing pneumatic control valve is 90 degrees, but the power take-off stroke of the pneumatic control valve of the utility model is only 45 degrees; and the valve body is made of profile machining, so that casting defects can be avoided, and the internal design is more optimized.

[0007] As a further improvement of the utility model, the height of the lifting air channel, the descending air channel and the power take-off air channel is the same, and the height of the air inlet channel is lower than the height of the lifting air channel.

[0008] As a further improvement of the utility model, the lifting air cavity, the descending air cavity and the power take-off cavity are vertically arranged, and the lifting valve core, the descending valve core and the power take-off valve core are correspondingly arranged in the lifting air cavity, the descending air cavity and the power take-off cavity respectively. Whether the air inlet channel is communicated with the lifting air channel, the descending air channel and the power take-off air channel is controlled by the valve core.

[0009] As a further improvement of the utility model, the upper part of the valve body is transversely provided with a fixed shaft, and the handle and the power take-off are rotatably connected to the fixed shaft, the handle extends upward, the handle is provided with driving blocks corresponding to the lifting valve core and the descending valve core, and the power take-off is provided corresponding to the power take-off valve core. The handle is swung forward and backward to control the opening and closing movement of the lifting valve core and the descending valve core, and the power take-off is swung forward and backward to control the opening and closing movement of the power take-off valve core.

[0010] As a further improvement of the utility model, the driving blocks are provided with slots one, the power take-off is provided with slots two, a transmission rod is arranged between the driving blocks and the power take-off, the two ends of the transmission rod are respectively inserted into the slots one and the slots two, the transmission rod is parallel to the fixed shaft, the power take-off is located above the power take-off valve core, and the driving blocks are located above the lifting valve core and the descending valve core. The driving blocks and the power take-off are controlled to be linked by the transmission rod.

[0011] As a further improvement of the utility model, the power take-off is provided with a dial piece, and the movement stroke of the power take-off dial piece is 45°. The movement stroke of the existing air control valve PTO (power take-off) is 90°, and there is a large gap between the valve cover after being opened, so that dust and impurities can enter; the movement stroke of the air control valve power take-off is 45°, which is matched with the valve cover to realize full stroke sealing and effectively isolate dust and impurities.

[0012] As a further improvement of the utility model, the valve body is further provided with an exhaust port. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective view of the utility model.

[0014] Figure 2 It is a front view of the utility model.

[0015] Figure 3 It is a top view of the utility model.

[0016] Figure 4 It is Figure 2 the AA sectional view.

[0017] Figure 5 It is Figure 2 the BB sectional view.

[0018] Figure 6 It is Figure 2 the CC sectional view.

[0019] Figure 7 for Figure 2 DD section view.

[0020] Figure 8 for Figure 2 EE-directed sectional view.

[0021] Figure 9 for Figure 6 FF section view.

[0022] Figure 10 This is a schematic diagram showing the pneumatic control valve in the neutral position.

[0023] Figure 11 This is a schematic diagram showing the pneumatic control valve in the lifted position.

[0024] Figure 12 This is a schematic diagram showing the pneumatic control valve in the lowered position.

[0025] The components are as follows: 1. Valve body; 2. Inlet channel; 3. Inlet; 4. Lifting port; 5. Lowering port; 6. Power take-off port; 7. Lifting chamber; 8. Lowering chamber; 9. Power take-off chamber; 10. Lifting channel; 11. Lowering channel; 12. Power take-off channel; 13. Lifting valve core; 14. Lowering valve core; 15. Power take-off valve core; 16. Fixed shaft; 17. Power take-off; 17a. Paddle shifter; 18. Handle; 18a. Drive block; 19. Slot 2; 20. Slot 1; 21. Transmission rod; 22. Exhaust port. Detailed Implementation

[0026] like Figures 1-12 As shown, a pneumatic control valve for a dump truck includes a valve body 1. An air intake channel 2 is provided within the valve body 1. The valve body 1 is equipped with an air inlet 3, a lifting air inlet 4, a lowering air inlet 5, and a power take-off (PTO) air inlet 6. An exhaust port 22 is also provided on the valve body 1. The air inlet 3 is connected to the air intake channel 2. The air intake channel 2 is connected to the lifting air channel 10, lowering air channel 11, and PTO air channel 12 within the valve body 1 via the lifting air chamber 7, lowering air chamber 8, and PTO air chamber 9. The lifting air channel 10 is connected to the lifting air inlet 4, the lowering air channel 11 is connected to the lowering air inlet 5, and the PTO air channel 12 is connected to the PTO air inlet 6.

[0027] The lifting air passage 10, lowering air passage 11, and power take-off (PTO) air passage 12 are at the same height, while the height of the intake air passage 2 is lower than that of the lifting air passage 10. The lifting air chamber 7, lowering air chamber 8, and PTO air chamber 9 are all vertically arranged, and each of these chambers contains a lifting valve core 13, a lowering valve core 14, and a PTO valve core 15, respectively. These valve cores control whether the intake air passage 2 is connected to the lifting air passage 10, lowering air passage 11, and PTO air passage 12.

[0028] The upper part of the valve body 1 is transversely provided with a fixed shaft 16, the fixed shaft 16 is rotationally connected with a handle 18 and a power take-off 17, the handle 18 extends upward, the handle 18 is provided with a driving block 18a corresponding to the lifting valve core 13 and the lowering valve core 14, and the power take-off 17 is provided corresponding to the power take-off valve core 15. The handle 18 swings forward and backward to control the opening and closing movements of the lifting valve core 13 and the lowering valve core 14, and the power take-off swings forward and backward to control the opening and closing movements of the power take-off valve core 15. A slot one 20 is formed in the driving block 18a, a slot two 19 is formed in the power take-off, a transmission rod 21 is arranged between the driving block 18a and the power take-off, the two ends of the transmission rod 21 are respectively inserted into the slot one 20 and the slot two 19, the transmission rod 21 is parallel to the fixed shaft 16, the power take-off is located above the power take-off valve core 15, and the driving block 18a is located above the lifting valve core 13 and the lowering valve core 14. The driving block 18a and the power take-off are controlled to be linked through the transmission rod 21. The power take-off is provided with a dial piece 17a, and the movement stroke of the power take-off dial piece 17a is 45°. The movement stroke of the existing pneumatic control valve PTO (power take-off) is 90°, and there is a large gap between the valve cover after being opened, so that dust and impurities enter; and the movement stroke of the pneumatic control valve power take-off is 45°, which is matched with the valve cover to realize full-stroke sealing and effectively isolate dust and impurities.

[0029] As Figure 10 When the pneumatic control valve is in the middle position, the compressed gas is sealed in the lower flow channel and the air cavity at this time, the compressed gas enters from the air inlet 3 and goes to the lifting, lowering and power take-off air cavities 9, because the valve core does not move, the valve port is not opened, and the compressed air is sealed in the valve body 1.

[0030] As Figure 11 , the power take-off dial piece 17a needs to be opened when lifting, and the handle 18 is dialled to the lifting position, at this time the compressed air flow direction is: the air inlet 3 enters, the lifting air port 4 and the power take-off air port 6 output. When the pneumatic control valve is in the lifting state, the power take-off dial piece 17a is opened at this time, the handle 18 is dialled to the lifting position, the compressed gas enters from the air inlet 3 and goes to the lifting, lowering and power take-off air cavities 9, the lifting valve core 13 and the power take-off valve core 15 open the lower sealing pad, the compressed air enters the lifting air cavity 7 and the power take-off air cavity 9, and is output from the lifting air port 4 and the power take-off air port 6.

[0031] As Figure 12 , the handle 18 only needs to be dialled to the lowering position when lowering, at this time the compressed air flow direction is: the air inlet 3 enters, and the lowering air port 5 outputs. When the pneumatic control valve is in the lowering state, the handle 18 is dialled to the lowering position at this time, the power take-off dial piece 17a is automatically closed, the compressed gas enters from the air inlet 3 and goes to the lifting, lowering and power take-off air cavities 9, the lowering valve core 14 opens the lower sealing pad, the compressed air enters the lowering air cavity 8, and is output from the lowering air port 5.

[0032] The core of the air control valve is to enhance the dustproof performance and structural strength. On the basis of not changing the installation size of the valve, the appearance of the power takeoff, the cover structure, the closed external gap, the internal valve core is increased with the upper sealing ring, the dust and impurities are isolated from entering the air cavity, the dustproof performance is increased. Moreover, the valve body 1 uses profile machining, the handle 18 and the valve cover clamping groove fixed cooperation position also use metal structure, the structural strength is higher. Unlike the casting structure of the existing air control valve, the air control valve uses profile machining, the structural strength is higher, the size control is more accurate, and the casting defects can be avoided.

[0033] The utility model is not limited to the above-mentioned embodiments, on the basis of the technical scheme disclosed in the utility model, the skilled in the art can make some substitutions and deformation to some technical features in the disclosed technical content without creative labor, and these substitutions and deformation are all within the protection scope of the utility model.

Claims

1. A pneumatic control valve for a dump truck comprising a valve body, characterized in that, The valve body is provided with an air inlet channel, and the valve body is respectively provided with an air inlet, a lifting air inlet, a descending air inlet and a power take-off air inlet.

2. A pneumatic control valve for a dump truck as defined in claim 1, characterized in that The lifting air channel, the descending air channel and the power take-off air channel have the same height, and the height of the air inlet channel is lower than the height of the lifting air channel.

3. A pneumatic control valve for a dump truck as claimed in claim 1 or 2, characterized in that The lifting air cavity, the descending air cavity and the power take-off air cavity are vertically arranged, and the lifting air cavity, the descending air cavity and the power take-off air cavity are respectively provided with a lifting valve core, a descending valve core and a power take-off valve core.

4. A pneumatic control valve for a dump truck as defined in claim 3, wherein The upper part of the valve body is laterally provided with a fixed shaft, and the fixed shaft is rotatably connected with a handle and a power take-off device.

5. A pneumatic control valve for a dump truck as defined in claim 4, wherein The driving block and the power take-off device are provided with a transmission rod, and the transmission rod is parallel to the fixed shaft.

6. A pneumatic control valve for a dump truck as defined in claim 4, wherein The power take-off device is provided with a shifting piece, and the movement stroke of the shifting piece is 45°.

7. A pneumatic control valve for a dump truck as defined in claim 1 or 2, characterized in that The valve body is further provided with an air outlet.

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