Spraying oil cylinder, control system and engineering machinery

Abstract

The invention discloses a spraying oil cylinder, a control system and engineering machinery, and belongs to the hydraulic field. The spraying oil cylinder comprises a cylinder barrel assembly, a piston and a nozzle; the piston is movably arranged in the cylinder barrel assembly, one end of the piston is connected with the cylinder barrel assembly through an elastic piece, the nozzle is fixed to the end, away from the elastic piece, of the cylinder barrel assembly, and a first piston rod fixedly connected with the piston is arranged between the nozzle and the piston. The cylinder barrel assembly is externally connected with a hydraulic oil way, adjusts oil pressure on the two sides of the piston, drives the position of the first piston rod to be switched, and achieves size switching of an opening of the nozzle. During use, the oil pressure on the two sides of the piston is controlled through an external hydraulic oil way, telescopic movement of the first piston rod is achieved, the opening amount of the nozzle is adjusted according to the actually-needed spraying amount, the spraying amount of the nozzle is controllable, and fine control over the spraying amount is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic technology, in particular to a spraying oil cylinder, a control system and engineering machinery. BACKGROUND

[0002] In recent years, the development trend of regenerative machinery is increasingly diversified, and improving the core technology level is particularly important for enhancing the competitiveness of cold regenerative machines. As an important indicator of regenerative machinery, the uniformity of spraying water becomes an important factor for measuring construction quality. The nozzle used for spraying water can usually only control on-off, and cannot control the amount of spraying water, so there is a problem of uneven flow control of the spray head. At the same time, due to the principle of regeneration, the external nozzle is also prone to regeneration material adhesion and blockage, which affects the performance and quality of the mixture and has a greater impact on the regeneration operation effect. SUMMARY

[0003] The purpose of the present application is to provide a spraying oil cylinder, a control system and engineering machinery to solve the above-mentioned defects caused by the prior art.

[0004] To achieve the above-mentioned purpose, the present application is realized by adopting the following technical scheme: In a first aspect, the present application discloses a spraying oil cylinder, comprising a cylinder assembly; a piston movably arranged in the cylinder assembly, one end of the piston being connected to the cylinder assembly through an elastic member, a nozzle fixed to one end of the cylinder assembly away from the elastic member, the nozzle being provided with a first piston rod fixed to the piston between the nozzle and the piston; wherein the cylinder assembly is connected with a hydraulic oil circuit, the oil pressure on both sides of the piston is adjusted, the position of the first piston rod is switched, and the size of the opening of the nozzle is switched.

[0005] In a further aspect of the present application, the guide sleeve is arranged on the side of the cylinder assembly close to the nozzle, and the first piston rod is movably connected to the guide sleeve.

[0006] In a further aspect of the present application, the piston divides the cylinder assembly into a first cavity and a second cavity, the first piston rod is arranged in the first cavity, and the elastic member is arranged in the second cavity.

[0007] In a further aspect of the present application, the second cavity is further provided with a second piston rod fixed to the piston, and the elastic member is connected to the second piston rod and the cylinder assembly.

[0008] In a further aspect of the present application, the first piston rod, the piston and the second piston rod are coaxially arranged.

[0009] Further, the cylinder assembly is provided with a cylinder bottom oil port and a piston rod oil port, the cylinder bottom oil port is communicated with the second cavity, and the piston rod oil port is communicated with the first cavity.

[0010] In a second aspect, the application further discloses a control system comprising the spraying oil cylinder, the driving module and the controller. The controller is configured to adjust the oil pressure on both sides of the piston, switch the first piston rod position, and control the size adjustment of the nozzle opening according to the driving module.

[0011] In a further aspect of the application, the driving module comprises a communicating pressure reducing valve and a proportional valve, the working port of the proportional valve is communicated with the first piston rod side of the cylinder assembly, and the working port of the pressure reducing valve is connected to the elastic member side of the cylinder assembly. The controller is configured to adjust the oil pressure on both sides of the piston, switch the first piston rod position, and control the size adjustment of the nozzle opening according to the pressure reducing valve and the proportional valve.

[0012] In a further aspect, the P port of the pressure reducing valve is connected to the P port of the proportional valve, the T port of the pressure reducing valve is connected to the T port of the proportional valve, the A port of the proportional valve is communicated with the first piston rod side of the cylinder assembly, the A port of the pressure reducing valve is communicated with the elastic member side of the cylinder assembly, the P port of the pressure reducing valve is connected to the oil outlet of the power source, and the T port of the pressure reducing valve is connected to the oil return port of the oil tank. The controller is configured to control the input fixed oil pressure of the pressure reducing valve, adjust the oil pressure on both sides of the piston, switch the first piston rod position, and control the size adjustment of the nozzle opening according to the size of the input oil pressure of the proportional valve.

[0013] In a third aspect, the application further discloses an engineering device comprising the control system.

[0014] The application has the following beneficial effects: In the application, the piston is connected to the cylinder assembly through an elastic member at one end, the size of the oil pressure on both sides of the piston is controlled through an external hydraulic oil circuit during use, the extension and retraction movement of the first piston rod is realized, that is, the position switching, the size of the nozzle opening is adjusted according to the actual spraying amount, the spraying amount of the nozzle is controllable, the fine control of the spraying amount is achieved, and the outlet of the nozzle can be cleaned when the first piston rod extends out of the nozzle, so that the blocking of the regenerated material is prevented.

[0015] In addition, the pressure reducing valve and the proportional valve are arranged in the external oil circuit of the spraying oil cylinder, the adjustment of the pressure on both sides of the piston is quickly and safely completed through the two valve bodies during use, and the rapid control of the spraying amount of the nozzle is realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a spraying oil cylinder in an embodiment of the application; Figure 2 This is a schematic diagram of the control system in an embodiment of this application.

[0017] The components are: 1. End cap; 2. Spring; 3. Second piston rod; 30. First piston rod; 4. Cylinder assembly; 41. First chamber; 42. Second chamber; 5. Piston; 6. Guide sleeve; 7. Nozzle; 8. Cylinder bottom port; 9. Piston rod port; 10. Medium inlet; 11. Medium outlet; 12. Pressure reducing valve; 13. Proportional valve. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0019] like Figure 1 As shown, this application discloses an embodiment of a spraying cylinder, which includes a cylinder assembly 4, a piston 5, and a nozzle 7. The piston 5 is movably disposed inside the cylinder assembly 4, and one end of the piston 5 is connected to the cylinder assembly 4 through an elastic element. The nozzle 7 is fixed at the end of the cylinder assembly 4 away from the elastic element, and a first piston rod 30 is provided between the nozzle 7 and the piston to fix the piston 5. The cylinder assembly 4 is externally connected to a hydraulic oil circuit, and the oil pressure on both sides of the piston 5 is adjusted to drive the position of the first piston rod 30 to switch, thereby realizing the switching of the size of the nozzle 7 opening.

[0020] In use, the hydraulic circuit supplies oil to both sides of the piston 5, adjusts the pressure of the piston 5, and completes the movement of the piston 5. Ultimately, the first piston rod 30 moves to change the size of the nozzle 7 opening, thereby adjusting the spray volume. As the deformation of the elastic element changes, its potential energy gradually changes, and the pressure on the first piston rod 30 side of the cylinder assembly 4 needs to be adjusted accordingly.

[0021] In some embodiments, a spray cylinder is specifically designed such that the spray volume of the nozzle 7 in the spray cylinder can be adjusted, avoiding the drawback of traditional nozzles 7 only being able to open and close, which affects the uniformity of spraying.

[0022] Continue to observe the appendix Figure 1In this embodiment, the piston 5 divides the cylinder assembly 4 into a first cavity 41 and a second cavity 42. The first piston rod 30 is arranged in the first cavity 41, and the elastic element is installed in the second cavity 42. The second cavity 42 is also provided with a second piston rod 3, which passes through the cylinder assembly 4. An end cap 1 is fixed at the tail of the cylinder assembly 4, and part of the second piston rod 3 is placed in the end cap 1. The second piston rod 3 is fixedly connected to the piston 5. The elastic element here is a spring 2, which is sleeved on the second piston rod 3 and connected at both ends to the cylinder assembly 4 and the rod body of the second piston rod 3, respectively. In order to facilitate the directional movement of the first piston rod 30, a guide sleeve 6 is radially installed in the first cavity 41 of the cylinder assembly 4. The first piston rod 30 is connected to the guide sleeve 6 with clearance fit, but it is necessary to ensure that hydraulic oil does not leak out of the first cavity 41 during installation.

[0023] In this embodiment, the nozzle 7 is fixed at the end of the cylinder assembly 4 away from the end cover 1. The nozzle 7 is fixedly installed together with the guide sleeve 6 and the cylinder assembly 4. The nozzle 7 has a medium inlet 10 on its side. The spraying medium is transported into the nozzle 7 through this inlet and sprayed out from the medium outlet 11 at the end of the nozzle 7. During use, the external medium has a certain pressure during transmission, which allows the medium to flow. Under normal circumstances, the medium can be water, mortar, asphalt, etc. It should be noted that when the medium is a material that is easy to adhere to and solidify, such as mortar or asphalt, the residual mortar or asphalt on the nozzle 7 can be removed by fully extending the first piston rod 30 to ensure the normal use of the nozzle 7.

[0024] In a further embodiment, the first piston rod 30, the piston 5, and the second piston rod 3 are coaxially arranged, which facilitates the movement of the piston 5 and minimizes the occurrence of bias stress.

[0025] In this embodiment, the oil ports on the cylinder assembly 4 are arranged. The cylinder assembly 4 is provided with a cylinder bottom oil port 8 and a piston rod oil port 9. The cylinder bottom oil port 8 is connected to the second cavity 42, and the piston rod oil port 9 is connected to the first cavity 41. In use, the cylinder bottom oil port 8 and the piston rod oil port 9 are connected to the external oil circuit.

[0026] This application provides another embodiment, which discloses a control system that includes the spray cylinder, drive module and controller in the above embodiment; The controller is configured to adjust the oil pressure in the chambers on both sides of the piston 5 according to the drive module, switch the position of the first piston rod 30, and control the size adjustment of the nozzle 7 opening. As attached Figure 1 and 2As shown, in this embodiment, the drive module includes a pressure reducing valve 12 and a proportional valve 13 connected together. The P port of the pressure reducing valve 12 is connected to the P port of the proportional valve 13, the T port of the pressure reducing valve 12 is connected to the T port of the proportional valve 13, the A port of the pressure reducing valve 12 is connected to the bottom oil port 8 of the spray cylinder, the A port of the proportional valve 13 is connected to the piston rod oil port 9 of the spray cylinder, the P port of the pressure reducing valve 12 is connected to the oil outlet of the power source, and the T port of the pressure reducing valve 12 is connected to the oil return port of the oil tank.

[0027] When using, During spraying operations, the controller inputs pressurized oil through the P port of the pressure reducing valve 12, and then through the A port of the pressure reducing valve 12 to input pressurized oil with a fixed pressure value to the bottom port 8 of the spraying cylinder. At the same time, pressurized oil enters through the P port of the proportional valve 13, and through the A port of the proportional valve 13, inputs continuously varying pressure oil to the piston rod port 9 of the spraying cylinder.

[0028] When the pressure value of the oil in the first chamber 41 is less than the pressure value of the oil in the second chamber 42, the piston rod in the nozzle 7 of the spray cylinder can extend out of the nozzle 7 to clean the nozzle 7.

[0029] When the pressure value of the oil in the first chamber 41 is equal to the pressure value of the oil in the second chamber 42, the nozzle 7 of the spray cylinder returns to the closed state.

[0030] When the pressure of the oil in the first chamber 41 is greater than that in the second chamber 42, the first piston rod 30 gradually retracts into the cylinder, the nozzle 7 gradually opens, and the input medium is sprayed out. During the process, the output pressure value of the proportional valve 13 can be controlled to set the amount of medium sprayed by the nozzle 7, thereby achieving precise control of the spraying volume.

[0031] This application also provides an embodiment relating to engineering equipment that includes the control system described in the above embodiment.

[0032] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A spraying oil cylinder, characterized in that, include Cylinder assembly (4); Piston (5), which is movably disposed within the cylinder assembly (4), with one end of the piston (5) connected to the cylinder assembly (4) via an elastic element. The nozzle (7) is fixed to one end of the cylinder assembly (4) away from the elastic member, and a first piston rod (30) is provided between the nozzle (7) and the piston to fix the piston (5). The cylinder assembly (4) is connected to an external hydraulic circuit. The oil pressure on both sides of the piston (5) is adjusted to drive the first piston rod (30) to switch positions, thereby switching the size of the nozzle (7) opening.

2. The spray cylinder according to claim 1, characterized in that, The cylinder assembly (4) is connected to the guide sleeve (6) on the side near the nozzle (7), and the first piston rod (30) is movably connected to the guide sleeve (6).

3. The spray cylinder according to claim 1, characterized in that, The piston (5) divides the cylinder assembly (4) into a first cavity (41) and a second cavity (42), the first piston rod (30) is arranged in the first cavity (41), and the elastic element is installed in the second cavity (42).

4. The spray cylinder according to claim 3, characterized in that, The second cavity (42) is also provided with a second piston rod (3) that is fixed to the piston (5), and the elastic element connects the second piston rod (3) and the cylinder assembly (4).

5. The spray cylinder according to claim 4, characterized in that, The first piston rod (30), the piston (5), and the second piston rod (3) are coaxially arranged.

6. The spray cylinder according to claim 3, characterized in that, The cylinder assembly (4) is provided with a cylinder bottom oil port (8) and a piston rod oil port (9). The cylinder bottom oil port (8) is connected to the second cavity (42), and the piston rod oil port (9) is connected to the first cavity (41).

7. A control system, characterized in that, Includes the spray cylinder, drive module, and controller as described in any one of claims 1 to 6; The controller is configured to adjust the oil pressure on both sides of the piston (5) according to the drive module, switch the position of the first piston rod (30), and control the size adjustment of the nozzle (7) opening.

8. The control system according to claim 7, characterized in that, The drive module includes a pressure reducing valve (12) and a proportional valve (13) connected together. The working port of the proportional valve (13) is connected to the first piston rod (30) side of the cylinder assembly (4), and the working port of the pressure reducing valve (12) is connected to the elastic element side of the cylinder assembly (4). The controller is configured to adjust the oil pressure on both sides of the piston (5) according to the pressure reducing valve (12) and the proportional valve (13), switch the position of the first piston rod (30), and control the size adjustment of the nozzle (7) opening.

9. The control system according to claim 8, characterized in that, The P port of the pressure reducing valve (12) is connected to the P port of the proportional valve (13), the T port of the pressure reducing valve (12) is connected to the T port of the proportional valve (13), the A port of the proportional valve (13) is connected to the first piston rod (30) side of the cylinder assembly (4), the A port of the pressure reducing valve (12) is connected to the elastic element side of the cylinder assembly (4), the P port of the pressure reducing valve (12) is connected to the oil outlet of the power source, and the T port of the pressure reducing valve (12) is connected to the oil return port of the oil tank. The controller is configured to control the pressure reducing valve (12) to input a fixed oil pressure, adjust the oil pressure on both sides of the piston (5) according to the magnitude of the oil pressure input by the proportional valve (13), switch the position of the first piston rod (30), and control the size adjustment of the nozzle (7) opening.

10. An engineering device, characterized in that, The control system includes any one of claims 7 to 9.

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