Four-cylinder synchronous hydraulic system

Abstract

The utility model relates to the technical field of environmental protection equipment, in particular to a four-cylinder synchronous hydraulic system which comprises a driving cylinder used as a driving piece to drive a compression box body or a compression equipment main body to complete lifting. The device further comprises a driving medium conveying system. The driving cylinders comprise two first driving cylinders and two second driving cylinders; the section size of an annular inner cavity formed in one end of the rod cavity of the first driving cylinder body is matched with that of an inner cavity formed in one end of the rodless cavity of the second driving cylinder body; the driving medium conveying system comprises a first conveying pipe, a synchronous motor is arranged on the first conveying pipe, and the synchronous motor is provided with two conveying openings which are connected with connecting openings formed in rodless cavities of cylinder bodies of the two first driving cylinders respectively. The utility model has the characteristics of simpler and more reasonable structural design, more convenience in installation and arrangement and better synchronism.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection equipment technical field, especially a four cylinder synchronous hydraulic system. BACKGROUND

[0002] The buried garbage compression station is used for sinking the compression box or the compression equipment main body below the ground level, so that the garbage collection vehicle on the ground level can directly dump the unloading, and this structure needs to configure a lifting system to realize the rising or falling of the compression box or the compression equipment main body.

[0003] The two rigid synchronous structures have the following disadvantages: the rigid synchronous needs to rely on the rigid strength of the structural member to realize, the overall structure is relatively cumbersome, the required space is large, and the arrangement is not convenient; secondly, the required structural member material and quantity are large, and the cost is relatively large; finally, it is not easy to guarantee the synchronism.

[0004] Therefore, how to provide a four cylinder synchronous hydraulic system with a more simple and reasonable structure design, more convenient installation and arrangement, and better synchronism becomes a technical problem to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0005] In view of the above defects of the prior art, the technical problem to be solved by the utility model is how to provide a four cylinder synchronous hydraulic system with a more simple and reasonable structure design, more convenient installation and arrangement, and better synchronism.

[0006] To achieve the above purpose, the utility model provides a four cylinder synchronous hydraulic system, which comprises a driving cylinder for driving the compression box or the compression equipment main body to complete lifting as a driving member; further comprising a driving medium conveying system; characterized in that: the driving cylinder comprises two first driving cylinders and two second driving cylinders; the cross section size of the annular inner cavity formed at the rod cavity one end of the first driving cylinder body matches the cross section size of the inner cavity at the rodless cavity one end of the second driving cylinder body; the driving medium conveying system comprises a first conveying pipe, a synchronous motor is arranged on the first conveying pipe, the synchronous motor has two conveying ports and is connected with the connecting ports of the rodless cavities of the two first driving cylinder bodies respectively; the connecting ports of the rod cavities of the first driving cylinder bodies are connected with the connecting ports of the rodless cavities of the second driving cylinder bodies respectively; the driving medium conveying system further comprises a second conveying pipe, and the conveying ends of the second conveying pipe are connected with the connecting ports of the rod cavities of the second driving cylinder bodies respectively.

[0007] Thus, the four-cylinder synchronous hydraulic system described above, when working, includes driving the compression box or the compression device main body to complete the lifting action, at this time, the first delivery pipe inputs the medium to the rodless cavity of the first drive cylinder body, so that the drive rod of the first drive cylinder extends, at the same time, the medium in the rod cavity of the first drive cylinder body is input into the rodless cavity of the second drive cylinder body, and the medium in the rod cavity of the second drive cylinder body returns through the second delivery pipe; since the cross-sectional size of the annular inner cavity formed at one end of the rod cavity of the first drive cylinder body matches the cross-sectional size of the inner cavity at one end of the rodless cavity of the second drive cylinder body, the drive rod of the first drive cylinder and the drive rod of the second drive cylinder extend synchronously, the synchronization is better, and the compression box or the compression device main body can be better driven to complete the lifting action.

[0008] It also includes driving the compression box or the compression device main body to complete the sinking action, at this time, the second delivery pipe inputs the medium to the rod cavity of the second drive cylinder body, so that the drive rod of the second drive cylinder retracts, at the same time, the medium in the rodless cavity of the second drive cylinder body is input into the rod cavity of the first drive cylinder body, and the drive rod of the first drive cylinder retracts, the synchronization is better, and the compression box or the compression device main body can be better driven to complete the sinking action.

[0009] The system structure described above is more simple and reasonable, has fewer overall components, is more convenient to install and arrange, and has better synchronization.

[0010] Further, the two first drive cylinders and the two second drive cylinders are distributed in a rectangular shape in the horizontal direction; and the two first drive cylinders are arranged on the two sides of the rear end of the compression box or the compression device main body, and the two second drive cylinders are arranged on the two sides of the front end of the compression box or the compression device main body.

[0011] In this way, the positions of the two first drive cylinders and the two second drive cylinders are more reasonably arranged.

[0012] As an optimization, a supply pipe is further connected to the output end of the second delivery pipe, an electromagnetic supply valve is arranged on the supply pipe, and the distal end of the supply pipe is connected to the connecting port of the rod cavity of the first drive cylinder body.

[0013] In this way, by arranging the supply pipe and the electromagnetic supply valve on the supply pipe, the output and input of the medium can be better ensured to be equal, and the synchronization can be better ensured.

[0014] As an optimization, a delivery pipe is connected to each of the two delivery ports of the synchronous motor, a first electromagnetic ball valve is arranged on the delivery pipe, and the distal end of the delivery pipe is connected to the connecting port of the rodless cavity of the first drive cylinder body.

[0015] Thus, by setting the delivery pipe and arranging the first electromagnetic ball valve on the delivery pipe, the connection design is simpler and more convenient to control.

[0016] As an optimization, the intermediate pipe is connected to the connection port of the rod cavity of the first drive cylinder body, the second electromagnetic ball valve is arranged on the intermediate pipe, and the distal ends of the two intermediate pipes are respectively connected to the connection ports of the rodless cavities of the second drive cylinder bodies.

[0017] Thus, by setting the intermediate pipe and arranging the second electromagnetic ball valve on the intermediate pipe, the connection design is simpler and more convenient to control.

[0018] As an optimization, the return oil pipe is connected to the synchronous motor, and the distal end of the return oil pipe is connected to the return oil tank.

[0019] Thus, by setting the return oil pipe, the medium (oil) can be recovered into the return oil tank.

[0020] As an optimization, the drive cylinder is a hydraulic drive cylinder, and the drive medium delivery system is a hydraulic delivery system.

[0021] Thus, by using a hydraulic drive cylinder, the corresponding hydraulic oil is used as the medium, which is more stable and reliable, and can improve the synchronization.

[0022] As an optimization, the drive medium delivery system further includes a supply oil tank, the first delivery pipe is connected to the supply oil tank through the first connection pipe, and the second delivery pipe is connected to the supply oil tank through the second connection pipe; the oil inlet filter and the oil pump are arranged on the first connection pipe; and the oil return filter is arranged on the second connection pipe.

[0023] Thus, the drive medium delivery system is designed to be simpler and can better complete oil supply and oil return. By arranging the oil inlet filter and the oil return filter, the oil supply quality is better ensured.

[0024] Further, the gate valve and the pressure gauge are further arranged on the first connection pipe.

[0025] In summary, the four-cylinder synchronous hydraulic system has the following characteristics: 1. The "scissors fork" structure device required for rigid synchronization is removed, the self-weight of the lifting equipment with the same carrying capacity will be greatly reduced, which is beneficial to equipment transportation, installation, etc.

[0026] 2. There is no need to maintain and replace the damaged parts involved in the rigid synchronization structure due to wear.

[0027] 3. The four-cylinder synchronization relying on equal oil volume can achieve a synchronization accuracy of less than 0.2% (test data of the physical prototype under empty and full load), which is high in synchronization accuracy and low in cost.

[0028] 4. Under the premise of equivalent cost, the synchronization accuracy of the fully hydraulic four-cylinder synchronous oil circuit commonly used in the sanitation industry is not ideal, usually 2%-5%. In order to obtain higher synchronization accuracy, the "scissor fork" steel structure type is usually adopted, relying on rigid constraints to achieve it. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the four-cylinder synchronous hydraulic system in a specific embodiment of this utility model.

[0030] Figure 2 yes Figure 1 A schematic diagram of the structure after omitting the driving medium delivery system section. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for 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 manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] like Figure 1 and Figure 2 As shown, a four-cylinder synchronous hydraulic system includes a drive cylinder for driving a compression chamber or compression equipment body to complete lifting; it also includes a drive medium conveying system; the drive cylinder includes two first drive cylinders 1 and two second drive cylinders 2; and the cross-sectional dimensions of the annular inner cavity formed at one end of the rod cavity of the first drive cylinder are matched with the cross-sectional dimensions of the inner cavity at one end of the rodless cavity of the second drive cylinder; the drive medium conveying system includes a first conveying pipe 3, on which a synchronous motor 4 is provided, the synchronous motor having two conveying ports and each connected to a connection port of the rodless cavity of the two first drive cylinders; the connection ports of the rod cavities of the first drive cylinders are respectively connected to the connection ports of the rodless cavities of the second drive cylinders; the drive medium conveying system also includes a second conveying pipe 5, the conveying ends of the second conveying pipes being connected to the connection ports of the rod cavities of the second drive cylinders.

[0033] In this way, the four-cylinder synchronous hydraulic system described above, when working, includes driving the compression box or the compression device main body to complete the lifting action, at this time, the first delivery pipe inputs the medium to the rodless cavity of the first drive cylinder body, so that the drive rod of the first drive cylinder extends, at the same time, the medium in the rod cavity of the first drive cylinder body is input into the rodless cavity of the second drive cylinder body, and the medium in the rod cavity of the second drive cylinder body returns through the second delivery pipe; since the cross-sectional size of the annular inner cavity formed at one end of the rod cavity of the first drive cylinder body matches the cross-sectional size of the inner cavity at one end of the rodless cavity of the second drive cylinder body, the drive rod of the first drive cylinder and the drive rod of the second drive cylinder extend synchronously, the synchronization is better, and the compression box or the compression device main body can be better driven to complete the lifting action.

[0034] It also includes driving the compression box or the compression device main body to complete the sinking action, at this time, the second delivery pipe inputs the medium to the rod cavity of the second drive cylinder body, so that the drive rod of the second drive cylinder retracts, at the same time, the medium in the rodless cavity of the second drive cylinder body is input into the rod cavity of the first drive cylinder body, and the drive rod of the first drive cylinder retracts, the synchronization is better, and the compression box or the compression device main body can be better driven to complete the sinking action.

[0035] The system structure described above is more simple and reasonable, has fewer overall components, is more convenient to install and arrange, and has better synchronization.

[0036] Further, the two first drive cylinders and the two second drive cylinders are distributed in a rectangular shape in the horizontal direction; and the two first drive cylinders are arranged on the two sides of the rear end of the compression box or the compression device main body, and the two second drive cylinders are arranged on the two sides of the front end of the compression box or the compression device main body.

[0037] In this way, the positions of the two first drive cylinders and the two second drive cylinders are more reasonable.

[0038] In the specific embodiment, a supply pipe 6 is further connected to the output end of the second delivery pipe, an electromagnetic supply valve 7 is arranged on the supply pipe, the distal end of the supply pipe is connected to the connecting port of the rod cavity of the first drive cylinder body, respectively.

[0039] In this way, by arranging the supply pipe and the electromagnetic supply valve on the supply pipe, the output and input of the medium can be better ensured to be equal, and the synchronization can be better ensured.

[0040] In the specific embodiment, a delivery pipe 8 is further connected to the two delivery ports of the synchronous motor, a first electromagnetic ball valve 9 is arranged on the delivery pipe, the distal end of the delivery pipe is connected to the connecting port of the rodless cavity of the two first drive cylinder bodies, respectively.

[0041] Thus, by setting the delivery pipe and arranging the first electromagnetic ball valve on the delivery pipe, the connection design is simpler and more convenient to control.

[0042] In the embodiment, the intermediate pipe 10 is connected to the rod cavity of the first driving cylinder body, the second electromagnetic ball valve 11 is arranged on the intermediate pipe, and the distal ends of the two intermediate pipes are respectively connected to the connection ports of the rodless cavities of the second driving cylinder bodies.

[0043] Thus, by setting the intermediate pipe and arranging the second electromagnetic ball valve on the intermediate pipe, the connection design is simpler and more convenient to control.

[0044] In the embodiment, the oil return pipe 12 is connected to the synchronous motor, and the distal end of the oil return pipe is connected to the oil return tank 13.

[0045] Thus, by setting the oil return pipe, the medium (oil) can be recycled into the oil return tank.

[0046] In the embodiment, the driving cylinder is a hydraulic driving cylinder, and the driving medium delivery system is a hydraulic delivery system.

[0047] Thus, by using the hydraulic driving cylinder, the corresponding hydraulic oil is used as the medium, so that the system is more stable and reliable, and the synchronization is improved.

[0048] In the embodiment, the driving medium delivery system further includes the oil supply tank 14, the first delivery pipe is connected to the oil supply tank through the first connection pipe 15, the second delivery pipe is connected to the oil supply tank through the second connection pipe 16, the oil inlet filter 17 and the oil pump 18 are arranged on the first connection pipe, and the oil return filter 19 is arranged on the second connection pipe.

[0049] Thus, the driving medium delivery system is designed to be simpler, and the oil supply and oil return can be better completed. By arranging the oil inlet filter and the oil return filter, the oil supply quality is better ensured.

[0050] Further, the H-position electromagnetic reversing valve 20, the Y-position electromagnetic reversing valve 21, the two-section pressure overflow valve 22, the hydraulic lock 23, the one-way throttle valve 24, and the like are arranged on the first connection pipe and the second connection pipe (this part is prior art, and the specific connection mode is not described herein).

[0051] In operation, the system can realize the selection of the system pressure corresponding to the two-section pressure overflow valve through the reversing of the H-position electromagnetic reversing valve. The two-section pressure overflow valve can be set to one high pressure and one low pressure according to the needs, and the low pressure is used when the oil cylinder is recycled and the large and small synchronous oil cylinders are supplied with oil, which is helpful for the energy saving, oil temperature control, and prolonging of the service life of the system.

[0052] 2. The "H-position solenoid directional valve" is in the unloaded state in the neutral position, which is beneficial for system protection.

[0053] 3. The system can switch the oil inlet and return directions of ports A and B by switching the "Y-position solenoid directional valve", thereby enabling the cylinder to extend and retract as needed.

[0054] 4. The neutral position of the "Y-position solenoid directional valve" is the unloading state of ports A and B, which helps to eliminate system back pressure and thus facilitates the locking of the hydraulic lock.

[0055] Furthermore, a gate valve and a pressure gauge are also installed on the first connecting pipe.

[0056] In summary, the above-mentioned four-cylinder synchronous hydraulic system has the following characteristics: 1. By eliminating the "scissor fork" structure required for rigid synchronization, the self-weight of lifting equipment with the same load-bearing capacity will be significantly reduced, which is beneficial for equipment transportation and installation.

[0057] 2. The work content and costs of maintaining and replacing vulnerable parts due to wear and tear, which are not involved in the rigid synchronous structure.

[0058] 3. The four-cylinder synchronization achieved by equal volume of oil can achieve a synchronization accuracy of less than 0.2% (test data of empty and full load of physical prototype), with high synchronization accuracy and low cost.

[0059] 4. Under the premise of equivalent cost, the synchronization accuracy of the fully hydraulic four-cylinder synchronous oil circuit commonly used in the sanitation industry is not ideal, usually 2%-5%. In order to obtain higher synchronization accuracy, the "scissor fork" steel structure type is usually adopted, relying on rigid constraints to achieve it.

[0060] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A four-cylinder synchronous hydraulic system, comprising a drive cylinder for driving a compression box or compression device body to complete lifting as a driving member; further comprising a driving medium conveying system; characterized in that ； The driving cylinder comprises two first driving cylinders and two second driving cylinders; the first driving cylinder body has an annular inner cavity formed at one end of the rod cavity, and the cross-sectional dimension of the annular inner cavity is matched with the cross-sectional dimension of the inner cavity at one end of the rodless cavity of the second driving cylinder body; the driving medium conveying system comprises a first conveying pipe, a synchronous motor is arranged on the first conveying pipe, the synchronous motor has two conveying ports and is respectively connected with the connecting ports of the rodless cavities of the two first driving cylinder bodies; the connecting ports of the rod cavities of the first driving cylinder bodies are respectively connected with the connecting ports of the rodless cavities of the second driving cylinder bodies; the driving medium conveying system further comprises a second conveying pipe, and the conveying ends of the second conveying pipe are respectively connected with the connecting ports of the rod cavities of the second driving cylinder bodies.

2. A four-cylinder synchronous hydraulic system as claimed in claim 1, characterized in that; The second conveying pipe is further respectively connected with a supply pipe, the supply pipe is respectively provided with an electromagnetic supply valve, and the distal ends of the supply pipes are respectively connected with the connecting ports of the rod cavities of the first driving cylinder bodies.

3. A four-cylinder synchronous hydraulic system as claimed in claim 1, characterized in that; The two conveying ports of the synchronous motor are respectively connected with a conveying pipe, the conveying pipe is respectively provided with a first electromagnetic ball valve, and the distal ends of the two conveying pipes are respectively connected with the connecting ports of the rodless cavities of the two first driving cylinder bodies.

4. A four-cylinder synchronous hydraulic system as claimed in claim 3, characterized in that; The connecting ports of the rod cavities of the first driving cylinder bodies are respectively connected with an intermediate pipe, the intermediate pipe is provided with a second electromagnetic ball valve, and the distal ends of the two intermediate pipes are respectively connected with the connecting ports of the rodless cavities of the second driving cylinder bodies.

5. A four-cylinder synchronous hydraulic system as claimed in claim 1, characterized in that; An oil return pipe is connected with the synchronous motor, and the distal end of the oil return pipe is connected with an oil return tank.

6. A four-cylinder synchronous hydraulic system as claimed in claim 1, characterized in that; The driving cylinder is a hydraulic driving cylinder; the driving medium conveying system is a hydraulic conveying system.

7. A four-cylinder synchronous hydraulic system as claimed in claim 6, characterized in that; The driving medium conveying system further comprises an oil supply tank, the first conveying pipe is connected with the oil supply tank through a first connecting pipe, and the second conveying pipe is connected with the oil supply tank through a second connecting pipe; an oil inlet filter and an oil pump are arranged on the first connecting pipe; an oil return filter is arranged on the second connecting pipe.

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