阅读说明：本技术 一种串并联切换液压驱动阀台 (Series-parallel connection switching hydraulic drive valve table ) 是由 龙吉生 刘志伟 张会妍 王涛 吴斯鹏 何术东 蒋安 闫信 于子淇 瞿兆舟 于 2020-12-28 设计创作，主要内容包括：本发明涉及一种串并联切换液压驱动阀台,是以截止模块、节流调速模块、换向模块、平衡模块、油路切换模块为执行机构,通过叠加组合形成一个完整的阀台装置,通过DC24V电压控制线圈的得失电状态,经过阀芯的位移来改变油路的走向,实现了单阀台控制双油缸的液压。本发明以各功能模块组合而成的阀台为核心,能够实现两个油缸在动作时可以在串行联接或者并行联接两种模式中进行选择和切换,发挥出两种连接模式各自的优势,在液压驱动系统中发挥巨大的作用。在项目现场实际投运后,验证发明实用性、可靠性符合设计要求。(The invention relates to a series-parallel switching hydraulic drive valve table, which takes a cut-off module, a throttling speed regulation module, a reversing module, a balancing module and an oil circuit switching module as actuating mechanisms, forms a complete valve table device through superposition and combination, changes the trend of an oil circuit through the power-on and power-off state of a DC24V voltage control coil and the displacement of a valve core, and realizes that a single valve table controls the hydraulic pressure of double oil cylinders. The invention takes the valve table formed by combining all functional modules as a core, can realize the selection and switching of two oil cylinders in two modes of serial connection or parallel connection during action, exerts the respective advantages of the two connection modes and plays a great role in a hydraulic driving system. After the project is actually put into operation on site, the practicability and reliability of the invention are verified to meet the design requirements.)

1. A series-parallel connection switching hydraulic drive valve table is characterized in that a cut-off module, a throttling speed regulation module, a reversing module, a balancing module and an oil circuit switching module are used as actuating mechanisms, a complete valve table device is formed through superposition and combination, the direction of an oil circuit is changed through the power-on and power-off state of a DC24V voltage control coil and the displacement of a valve core, and the hydraulic pressure of double oil cylinders is controlled by a single valve table.

2. The hydraulic drive valve stand with series-parallel switching according to claim 1, wherein the modules with single functions are closely stacked from bottom to top, bolt holes are formed between the modules, and the functional modules are fastened on the valve stand base through-hole bolts.

3. The series-parallel switching hydraulic drive valve station as claimed in claim 1, wherein the direction of the oil path is changed by controlling the power-on and power-off state of the coil through the DC24V voltage to move the position of the valve core; the valve table has 3 electromagnetic coils which are 2 electromagnetic coils on the reversing module and 1 electromagnetic coil on the oil circuit switching module respectively; the power supply voltage grades of the 3 electromagnetic coils are all direct current 24V, the position of the valve core is changed through the power-on and power-off states of the 3 electromagnetic coils, and finally the trend of the oil way is changed.

4. The series-parallel switching hydraulic drive valve station according to claim 3, wherein the oil path runs in total of 4 of: forward in series, backward in series, forward in parallel, backward in parallel; the right electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the force-the self-skin (A) -the advantage-the force-the self-skin (B) -the self-absorption and the self-absorption; when the two oil cylinders are connected in series and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil way switching module is not electrified, and the oil way sequentially passes through the oil port, the water core, the straining point (B), the train-straining point (A), the self-lifting point (C), and the self-lifting point (A); when the two oil cylinders advance in parallel, the trend of the oil path is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, two oil paths simultaneously pass through an oil cylinder A and an oil cylinder B at this time, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. When the two oil cylinders are connected in parallel and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, the oil paths simultaneously pass through the oil cylinder A and the oil cylinder B in two ways, and the oil path flowing through the oil cylinder A sequentially passes through the oil port.

5. The hydraulic drive valve stand capable of realizing series-parallel switching according to claim 1, wherein the two oil cylinders are switched in a series connection mode and a parallel connection mode without disturbance regardless of a static state or an action process, and the two oil cylinders are selected to run in series or in parallel through power on or power off of the oil circuit switching module regardless of a static state of the oil cylinders or an action process of the oil cylinders in a forward or backward movement process.

Technical Field

The invention relates to the field of hydraulic drive, in particular to a hydraulic drive system for simultaneously driving two oil cylinders by a single hydraulic valve group.

Background

The number of single-valve-table driving hydraulic cylinders of the traditional hydraulic system is generally only two cases: 1) single valve stand driving single cylinder 2) the other is that the single valve stand simultaneously drives two or more cylinders. In the second case, the multiple cylinders are generally connected in series or in parallel in a single connection mode, that is, only one of the two connection modes is used in the same hydraulic system, and the two connection modes do not exist at the same time. However, the two systems have the advantages and the disadvantages respectively, the serial connection of the oil cylinders has the characteristic of very good synchronism but lower thrust, and the parallel connection of the oil cylinders has the characteristic of strong thrust but weaker synchronism. In order to realize coexistence of two connection modes in the same system and realize safe undisturbed switching of the two modes, it is extremely necessary to design a novel oil circuit series-parallel connection switching hydraulic valve table.

Disclosure of Invention

The invention aims to: the invention discloses a novel hydraulic valve stand which simultaneously drives two oil cylinders. The oil way direction in the valve table is changed through the oil way reversing module in the valve table, and finally the two oil cylinders can run under the following two different connection modes: 1) series connection: the oil passages of the two oil cylinders are connected end to end and are arranged in front of and behind each other. The 1 way oil outlet firstly passes through the front stage oil cylinder, and then drives the rear stage oil cylinder to act after the front stage oil cylinder acts. 2) Parallel connection: the oil passages of the two oil cylinders are connected in parallel, and one oil cylinder is connected to the left and the other oil cylinder is connected to the right. The valve platform has 2 routes of oil outlet, and the two oil cylinders simultaneously feed oil and return oil. Besides the oil way reversing module, the hydraulic valve stand is also provided with an electromagnetic reversing module, so that the valve stand has two functions of controlling the oil cylinders to move forwards and backwards, and controlling the oil cylinders to be connected in parallel and in series.

The specific technical scheme of the invention is as follows: the oil inlet of the valve platform sequentially passes through the stopping module, the throttling and speed regulating module, the reversing module, the balancing module and the oil path switching module and finally enters the oil cylinder. The reversing module and the oil path switching module are electromagnetic driving modules, the electromagnet is driven to be electrified through direct current 24V voltage, the valve body is attracted after the magnet coil is electrified, different oil discharge holes are opened and closed through displacement of the valve body, hydraulic oil enters different oil discharge pipelines along with the valve body, and then the piston of the oil cylinder is pushed, so that the oil cylinder is driven to move forwards and backwards. The core is that the oil way reversing module realizes the switching of oil ways between series connection and parallel connection through the switching of valve positions.

A series-parallel connection switching hydraulic drive valve table is characterized in that a cut-off module, a throttling and speed regulating module, a reversing module, a balancing module and an oil circuit switching module are used as actuating mechanisms, a complete valve table device is formed through superposition and combination, the direction of an oil circuit is changed through the power-on and power-off state of a DC24V voltage control coil and the displacement of a valve core, and the hydraulic pressure of double oil cylinders is controlled by a single valve table. In the system: the two oil cylinders can be switched between the serial connection mode and the parallel connection mode without disturbance no matter in a static state or in an action process.

Furthermore, the modules with single functions are closely overlapped and combined from bottom to top, bolt holes are formed among the modules, and the functional modules are fastened on the valve table base through the bolt holes.

Furthermore, the direction of an oil path is changed by controlling the power-on and power-off state of the coil through the DC24V voltage and moving the position of the valve core; the valve table has 3 electromagnetic coils, namely 2 electromagnetic coils on the reversing module and 1 electromagnetic coil on the oil path switching module. The power supply voltage grades of the 3 electromagnetic coils are all direct current 24V, the position of the valve core is changed through the power-on and power-off states of the 3 electromagnetic coils, and finally the trend of the oil way is changed. Wherein the oil paths of the core are divided into the following 4 types: series forward, series reverse, parallel forward, parallel reverse. The right electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the force-the self-skin (A) -the advantage-the force-the self-skin (B) -the self-absorption and the self-absorption; when the two oil cylinders are connected in series and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil way switching module is not electrified, and the oil way sequentially passes through the oil port, the water core, the straining point (B), the train-straining point (A), the self-lifting point (C), and the self-lifting point (A); when the two oil cylinders advance in parallel, the trend of the oil path is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, two oil paths simultaneously pass through an oil cylinder A and an oil cylinder B at this time, and the oil path flowing through the oil cylinder A sequentially passes through an oil port. When the two oil cylinders are connected in parallel and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, the oil paths simultaneously pass through the oil cylinder A and the oil cylinder B in two ways, and the oil path flowing through the oil cylinder A sequentially passes through the oil port.

Furthermore, the two oil cylinders can be switched between the serial connection mode and the parallel connection mode without disturbance no matter in a static state or in an action process, and the two oil cylinders can be selected to run in series or in parallel through power on or power off of the oil way switching module no matter in the static state of the oil cylinders or in the action process of advancing or retreating of the oil cylinders.

The invention has the beneficial effects that: the first is that the hydraulic valve table keeps the functions of the original reversing module and can change the oil inlet and return directions of the front cavity and the rear cavity of the oil cylinder, so that the pistons driving the two oil cylinders can move forwards and retreat. And secondly, an oil way reversing module is added, the connection mode between the two oil cylinders is changed through the power on and power off of the coil on the oil way switching module, when the oil way switching module is powered off, the two oil cylinders are connected in series and run synchronously in tandem, and the action strokes are completely consistent. When the oil circuit switching module is electrified, the two oil cylinders run in parallel from left to right, the thrust is completely consistent, and the thrust output by the two oil cylinders is twice of that of the serial operation. Based on the two functions, different oil cylinder connection modes can be selected by using the valve table under different working conditions, when the synchronism is preferential and large thrust is not required, the two oil cylinders are selected to operate in series, and when the thrust is preferential and the synchronism is not strict, the two oil cylinders are selected to operate in parallel. One valve table realizes two modes of driving the oil cylinder, and the multifunctional valve table is replaced by a low-cost valve table.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of a valve station.

Fig. 2 is a rear view of the valve station.

Fig. 3 is a left side view of the valve station.

Fig. 4 is a right side view of the valve station.

FIG. 5 is a top view of the valve station.

Fig. 6 is an oblique view of the valve table.

Fig. 7 is a schematic diagram of the oil passage structure of the valve table.

As shown in the figures, the equipment and components in each figure are explained by referring to the comments and the legend.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5, and 6: the attached drawings are front, rear, left, right, overlooking and oblique views of the whole hydraulic drive valve table. The whole valve platform is sequentially overlapped and combined with strokes by all the functional modules from bottom to top.

As shown in fig. 7: the oil inlet and outlet ports of each module are named as a first oil port, a second oil port, a third oil port and a natural oil all in sequence until a fifteenth oil port is known. The hydraulic oil sequentially passes through the stop module I, the throttling speed regulation module II, the reversing module III, the balancing module IV and the oil way switching module V from the oil inlet to the oil cylinder, then enters the oil cylinder A and the oil cylinder B, then is discharged from the tail part of the oil cylinder, and then passes through the reversing module and the stop module again and then flows out of the valve table from the fifteenth oil port.

When the two oil cylinders advance in series, the oil path trend is as follows: the right electromagnetic coil of the reversing module is electrified, the oil path switching module is not electrified, and the oil path sequentially passes through the oil port, the force-the self-skin (A) -the advantage-the force-the self-skin (B) -the self-absorption and the self-absorption; when the two oil cylinders are connected in series and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil way switching module is not electrified, and the oil way sequentially passes through the advantages of (A) -train-self-washing-and- (B) -train-and-then-the-advantage of (A) -a self-skin-effect of the self-skin-washing training device; when the two oil cylinders advance in parallel, the trend of the oil path is as follows: the right electromagnetic coil of the reversing module receives electricity, the oil path switching module receives electricity, the oil path simultaneously passes through the oil cylinder A and the oil cylinder B in two ways, and the oil path flowing through the oil cylinder A sequentially passes through the steps of. When the two oil cylinders are connected in parallel and retreat, the trend of the oil path is as follows: the left electromagnetic coil of the reversing module is electrified, the oil path switching module is electrified, the oil paths simultaneously pass through an oil cylinder A and an oil cylinder B in two ways, and the oil paths flowing through the oil cylinder A sequentially pass through the self-lifting self; the solenoid supply level of the commutation module and the oil circuit switching module is DCC 4V.

Examples

The project is taken as an example, the project is debugged, the debugging result meets the design requirement, the project is a household garbage incineration power generation project, a hydraulic system is used for providing power for garbage transmission equipment in an incinerator, 28 series-parallel switching valve tables described in the invention are used in a single production line of the project, the pressure of oil inlets of all the valve tables is 18MPa, the pressure of outlets of the valve tables is about 13MPa, series connection and parallel connection selection and switching of oil cylinders can be correspondingly carried out in the garbage transmission production process according to different working conditions, a series connection mode is used in the garbage normal operation process, and when garbage is hardened, and a fire grate cannot normally act due to insufficient thrust caused by high temperature, blockage of sundries and the like, the project is switched into parallel connection operation. The safety and the stability of the invention are verified through long-term operation in the high-standard industry of the power plant.