CN219081958U - Multifunctional leakless pneumatic control high-pressure hydraulic reversing valve - Google Patents

Abstract

The utility model belongs to the technical field of hydraulic reversing valves, and particularly relates to a multifunctional leak-free pneumatic control high-pressure hydraulic reversing valve, which comprises the following components: the valve seat mechanism, the valve block mechanism, the valve core mechanism and the pneumatic rod pressing mechanism; the pneumatic compression bar mechanism is suitable for pushing the valve core mechanism to act, a part of oil conveying channels are communicated, and the rest of oil conveying channels are cut off, so that the oil inlet is communicated with the first working port and the oil return port is communicated with the second working port, or the oil inlet is communicated with the second working port and the oil return port is communicated with the first working port; according to the utility model, by arranging the four oil conveying channels in the valve block mechanism, each oil conveying channel is independently sealed, the sealing performance of oil flowing in the reversing valve is improved, and meanwhile, the four oil conveying channels are matched with four ports for cross communication, so that the pressure of the valve core mechanism can be reduced, the reversing precision can be improved, the oil leakage risk is reduced, and the long-time pressure maintaining requirement of a chromatographic system under a high-pressure working condition is met.

Description

Multifunctional leakless pneumatic control high-pressure hydraulic reversing valve

Technical Field

The utility model belongs to the technical field of hydraulic reversing valves, and particularly relates to a multifunctional leak-free pneumatic control high-pressure hydraulic reversing valve.

Background

The traditional hydraulic reversing valve adopts a single valve core or a double valve core, and realizes communication, cutting-off and reversing of hydraulic oil flow by driving the valve core to move.

The single case needs the break-make of four mouths of control, and every case also needs the break-make of two mouths of respectively control in the two case, and the leakproofness of every mouth is poor to also can influence the switching-over precision, there is the oil leak risk, and can bring every case pressure to increase certainly, can't satisfy chromatographic system long-time pressurize demand under the pressure operating mode.

Therefore, there is a need to develop a new multifunctional leak-free pneumatic control high-pressure hydraulic reversing valve to solve the above problems.

Disclosure of Invention

The utility model aims to provide a multifunctional leak-free pneumatic control high-pressure hydraulic reversing valve.

In order to solve the technical problems, the utility model provides a multifunctional leak-free pneumatic control high-pressure hydraulic reversing valve, which comprises: the valve seat mechanism, the valve block mechanism, the valve core mechanism and the pneumatic rod pressing mechanism; the valve seat mechanism, the valve block mechanism and the pneumatic compression bar mechanism are sequentially arranged from bottom to top; an oil inlet, an oil return port, a first working port and a second working port are formed in the valve seat mechanism; the valve block mechanism is internally provided with a plurality of oil conveying channels, and the oil inlet, the oil return port, the first working port and the second working port are respectively communicated with the corresponding oil conveying channels; the valve core mechanism is movably arranged in the corresponding oil conveying channel, and the pneumatic compression bar mechanism is connected with the valve core mechanism; the pneumatic compression bar mechanism is suitable for pushing the valve core mechanism to act, a part of the oil conveying channels are communicated, and the rest of the oil conveying channels are cut off, so that the oil inlet is communicated with the first working port and the oil return port is communicated with the second working port, or the oil inlet is communicated with the second working port and the oil return port is communicated with the first working port.

Further, the valve seat mechanism includes: a valve seat plate; an oil inlet, an oil return port, a first working port and a second working port are formed in the valve seat plate.

Further, the valve block mechanism includes: a valve block plate; the valve block plate is provided with a first oil conveying channel, a second oil conveying channel, a third oil conveying channel and a fourth oil conveying channel; the first oil transportation channel is divided into a first front oil transportation channel and a first rear oil transportation channel by the first step groove, the second oil transportation channel is divided into a second front oil transportation channel and a second rear oil transportation channel by the second step groove, the third oil transportation channel is divided into a third front oil transportation channel and a third rear oil transportation channel by the third step groove, and the fourth oil transportation channel is divided into a fourth front oil transportation channel and a fourth rear oil transportation channel by the fourth step groove; the oil inlet is communicated with a first rear oil conveying channel and a fourth rear oil conveying channel, the first front oil conveying channel is communicated with a third rear oil conveying channel, the third rear oil conveying channel is communicated with a second working port, the fourth front oil conveying channel is communicated with a second rear oil conveying channel, the second rear oil conveying channel is communicated with the first working port, the second front oil conveying channel is communicated with the third front oil conveying channel, and the second front oil conveying channel is communicated with an oil return port; the valve core mechanism is positioned in the first oil conveying channel, the second oil conveying channel, the third oil conveying channel and the fourth oil conveying channel, so that the first front oil conveying channel and the first rear oil conveying channel are cut off at the first step groove, the second front oil conveying channel and the second rear oil conveying channel are cut off at the second step groove, the third front oil conveying channel and the third rear oil conveying channel are cut off at the third step groove, the fourth front oil conveying channel and the fourth rear oil conveying channel are cut off at the fourth step groove, namely the pneumatic pressing rod mechanism is suitable for pushing the valve core mechanism to move in the first oil conveying channel and the second oil conveying channel, so that the valve core mechanism opens the first front oil conveying channel and the first rear oil conveying channel at the first step groove, opens the second front oil conveying channel and the second rear oil conveying channel at the second step groove, namely the oil inlet is communicated with the second working port and the oil return port is communicated with the first working port; the pneumatic compression bar mechanism is suitable for pushing the valve core mechanism to move in the third oil conveying channel and the fourth oil conveying channel, so that the valve core mechanism opens the third front oil conveying channel and the third rear oil conveying channel at the third step groove, and opens the fourth front oil conveying channel and the fourth rear oil conveying channel at the fourth step groove, namely, the oil inlet is communicated with the first working port and the oil return port is communicated with the second working port.

Further, the spool mechanism includes: the first valve core component, the second valve core component, the third valve core component and the fourth valve core component; the first valve core component, the second valve core component, the third valve core component and the fourth valve core component are respectively positioned in the first oil transportation channel, the second oil transportation channel, the third oil transportation channel and the fourth oil transportation channel, namely the pneumatic compression bar mechanism is suitable for pushing the first valve core component and the second valve core component to move in the first oil transportation channel and the second oil transportation channel respectively, so that the first valve core component opens the first front oil transportation channel and the first rear oil transportation channel at the first step groove, and the second valve core component opens the second front oil transportation channel and the second rear oil transportation channel at the second step groove; the pneumatic compression bar mechanism is suitable for pushing the third valve core assembly and the fourth valve core assembly to move in the third oil conveying channel and the fourth oil conveying channel respectively, so that the third valve core assembly opens the third front oil conveying channel and the third rear oil conveying channel at the third step groove, and the fourth valve core assembly opens the fourth front oil conveying channel and the fourth rear oil conveying channel at the fourth step groove.

Further, the first spool assembly includes: the first valve core plug, the first valve core steel ball, the first valve core thimble, the first thimble side plug and the first thimble gland; the first valve core plug and the first thimble side plug are respectively and movably arranged at two sides of the first oil transportation channel, the first valve core steel ball and the first thimble gland are respectively fixed at two sides of the first valve core thimble, the first valve core steel ball is positioned in the first front oil transportation channel, and the first valve core thimble passes through the first thimble side plug to enable the first thimble gland to be exposed out of the first oil transportation channel; the first valve core plug is suitable for extruding the first valve core steel ball, so that the first valve core steel ball plugs the first stepped groove to cut off the first front oil conveying channel and the first rear oil conveying channel; the pneumatic compression bar mechanism is suitable for pushing the first thimble gland to extrude the first thimble side plug so as to drive the first valve core thimble to move towards the first front oil conveying channel, and further drive the first valve core steel ball to extrude the first valve core plug to move so as to open the first front oil conveying channel and the first rear oil conveying channel.

Furthermore, the first valve core plug and the first thimble side plug are both elastic corrugated pipes, and the first valve core plug and the first thimble side plug are installed in the first oil conveying channel through corresponding sealing pieces.

Further, the second spool assembly includes: the second valve core plug, the second valve core steel ball, the second valve core thimble, the second thimble side plug and the second thimble gland; the second valve core plug and the second thimble side plug are respectively and movably arranged at two sides of the second oil transportation channel, the second valve core steel ball and the second thimble gland are respectively fixed at two sides of the second valve core thimble, the second valve core steel ball is positioned in the second front oil transportation channel, and the second valve core thimble passes through the second thimble side plug to expose the second thimble gland from the second oil transportation channel; the second valve core plug is suitable for extruding the second valve core steel ball, so that the second valve core steel ball plugs the second front oil conveying channel and the second rear oil conveying channel at the second stepped groove to cut off the second front oil conveying channel and the second rear oil conveying channel; the pneumatic compression bar mechanism is suitable for pushing the second thimble gland to extrude the second thimble side plug so as to drive the second valve core thimble to move towards the second front oil delivery channel, and further drive the second valve core steel ball to extrude the second valve core plug to move so as to open the second front oil delivery channel and the second rear oil delivery channel; the third valve core assembly includes: the third valve core plug, the third valve core steel ball, the third valve core thimble, the third thimble side plug and the third thimble gland; the third valve core plug and the third thimble side plug are respectively and movably arranged at two sides of the third oil transportation channel, the third valve core steel ball and the third thimble gland are respectively fixed at two sides of the third valve core thimble, the third valve core steel ball is positioned in the third front oil transportation channel, and the third valve core thimble passes through the third thimble side plug to expose the third thimble gland from the third oil transportation channel; the third valve core plug is suitable for extruding the third valve core steel ball, so that the third valve core steel ball plugs a third front oil conveying channel and a third rear oil conveying channel at a third step groove to cut off the third front oil conveying channel and the third rear oil conveying channel; the pneumatic compression bar mechanism is suitable for pushing the third thimble gland to extrude the third thimble side plug so as to drive the third valve core thimble to move towards the third front oil transportation channel, and further drive the third valve core steel ball to extrude the third valve core plug to move so as to open the third front oil transportation channel and the third rear oil transportation channel; the fourth spool assembly includes: the fourth valve core plug, the fourth valve core steel ball, the fourth valve core thimble, the fourth thimble side plug and the fourth thimble gland; the fourth valve core plug and the fourth thimble side plug are respectively and movably arranged at two sides of the fourth oil transportation channel, the fourth valve core steel ball and the fourth thimble gland are respectively fixed at two sides of the fourth valve core thimble, the fourth valve core steel ball is positioned in the fourth front oil transportation channel, and the fourth valve core thimble passes through the fourth thimble side plug to expose the fourth thimble gland from the fourth oil transportation channel; the fourth valve core plug is suitable for extruding a fourth valve core steel ball, so that the fourth valve core steel ball plugs a fourth front oil conveying channel and a fourth rear oil conveying channel at a fourth stepped groove; the pneumatic compression bar mechanism is suitable for pushing the fourth thimble gland to extrude the fourth thimble side plug so as to drive the fourth valve core thimble to move towards the fourth front oil conveying channel, and further drive the fourth valve core steel ball to extrude the fourth valve core plug to move so as to open the fourth front oil conveying channel and the fourth rear oil conveying channel.

Further, the pneumatic compression bar mechanism includes: the first pneumatic pressure bar assembly and the second pneumatic pressure bar assembly; the first pneumatic pressing rod assembly is suitable for pushing the first thimble pressing cover and the second thimble pressing cover to respectively extrude the first thimble side plug and the second thimble side plug so as to drive the first valve core thimble and the second valve core thimble to respectively move towards the first front oil transportation channel and the second front oil transportation channel, and further drive the first valve core steel ball and the second valve core steel ball to respectively extrude the first valve core plug and the second valve core plug to move so as to open the first front oil transportation channel and the first rear oil transportation channel and open the second front oil transportation channel and the second rear oil transportation channel; the second pneumatic compression bar assembly is suitable for pushing the third thimble gland and the fourth thimble gland to respectively extrude the third thimble side plug and the fourth thimble side plug so as to drive the third valve core thimble and the fourth valve core thimble to respectively move towards the third front oil transportation channel and the fourth front oil transportation channel, and further drive the third valve core steel ball and the fourth valve core steel ball to respectively extrude the third valve core plug and the fourth valve core plug to move so as to open the third front oil transportation channel and the third rear oil transportation channel and the fourth front oil transportation channel and the fourth rear oil transportation channel.

Further, the first pneumatic ram assembly includes: the device comprises a first cylinder underframe, a first cylinder barrel, a first piston, a first bolt, a first top block and a first Y-shaped swing rod; the first cylinder barrel is arranged on the first cylinder underframe, and a first mounting cavity is formed in the first cylinder underframe and the first cylinder barrel and used for mounting the first piston, the first bolt and the first top block; the first piston is sleeved on the first bolt, the bottom of the first bolt is connected with the first top block, and a first set of springs are arranged between the bottom of the first piston and the first top block; a first pressing groove is formed in the top of the first top block, and a first pressing wheel is hinged in the first pressing groove; the concentrated end of the first Y-shaped swing rod is positioned below the first pressing wheel, and the two bifurcation ends of the first Y-shaped swing rod are respectively propped against the first thimble gland and the second thimble gland; the first cylinder barrel drives the first piston to extrude the first set of springs to move downwards on the first bolt, so that the first set of springs are propped against the first ejector block, the first pressing wheel is driven to prop against the concentrated end of the first Y-shaped swing rod, the first Y-shaped swing rod swings, and the two forked ends of the first Y-shaped swing rod respectively prop against the first ejector pin gland and the second ejector pin gland.

Further, the second pneumatic ram assembly includes: the second cylinder bottom frame, the second cylinder barrel, the second piston, the second bolt, the second top block and the second Y-shaped swing rod; the second cylinder barrel is arranged on the second cylinder underframe, and a second mounting cavity is formed in the second cylinder underframe and the second cylinder barrel and used for mounting the second piston, the second bolt and the second top block; the second piston is sleeved on the second bolt, the bottom of the second bolt is connected with the second top block, and a second sleeve spring is arranged between the bottom of the second piston and the second top block; a second pressing groove is formed in the top of the second top block, and a second pressing wheel is hinged in the second pressing groove; the concentrated end of the second Y-shaped swing rod is positioned below the second pressing wheel, and the two bifurcation ends of the second Y-shaped swing rod are respectively propped against the third thimble gland and the fourth thimble gland; the second cylinder barrel drives the second piston to extrude the second set of springs to move downwards on the second bolt, so that the second set of springs are propped against the second ejector block, the second pressing wheel is further driven to prop against the concentrated end of the second Y-shaped swing rod, the second Y-shaped swing rod swings, and the two forked ends of the second Y-shaped swing rod respectively prop against the third ejector pin gland and the fourth ejector pin gland.

The utility model has the beneficial effects that by arranging four oil conveying channels in the valve block mechanism, and controlling each oil conveying channel by the valve core mechanism, each oil conveying channel is independently sealed, the sealing performance of oil flowing in the reversing valve is improved, and simultaneously, the four oil conveying channels are matched with four ports for cross communication, so that the pressure of the valve core mechanism can be reduced, the reversing precision can be improved, the oil leakage risk is reduced, and the long-time pressure maintaining requirement of a chromatographic system under a high-pressure working condition is met.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of the present utility model;

FIG. 2 is a block diagram of a valve seat mechanism of the present utility model;

FIG. 3 is a first view in cross-section of a valve seat plate of the present utility model;

FIG. 4 is a second view in cross-section of the valve seat plate of the present utility model;

FIG. 5 is a block diagram of the valve block mechanism of the present utility model;

FIG. 6 is a first view in cross-section of a valve block plate of the present utility model;

FIG. 7 is a second view in cross-section of a valve block plate of the present utility model;

FIG. 8 is a block diagram of the valve core mechanism of the present utility model;

FIG. 9 is a block diagram of a first valve cartridge assembly of the present utility model;

FIG. 10 is a block diagram of a first pneumatic ram assembly of the present utility model;

fig. 11 is an internal structural view of the first pneumatic ram assembly of the present utility model.

Fig. 12 is a schematic diagram of a multi-functional leak-free pneumatically controlled high pressure hydraulic reversing valve of the present utility model.

In the figure:

1. a valve seat mechanism; 11. a valve seat plate; 111. an oil inlet; 112. an oil return port; 113. a first work port; 114. a second work port;

2. a valve block mechanism; 21. a valve block plate; 211. a first oil delivery passage; 2111. a first step groove; 2112. a first front oil delivery passage; 2113. a first post-oil delivery passage; 212. a second oil delivery passage; 213. a third oil delivery passage; 214. a fourth oil delivery passage;

3. A valve core mechanism; 31. a first valve core assembly; 311. a first valve core plug; 312. a first valve core steel ball; 313. a first spool ejector pin; 314. a first thimble side plug; 315. a first thimble gland; 32. a second spool assembly; 33. a third valve core assembly; 34. a fourth spool assembly;

4. a pneumatic compression bar mechanism; 41. a first pneumatic ram assembly; 411. a first cylinder chassis; 412. a first cylinder barrel; 413. a first piston; 414. a first bolt; 415. a first top block; 4151. a first pressing groove; 416. a first Y-shaped swing rod; 417. a first sleeve spring; 418. a first pinch roller; 42. and the second pneumatic compression bar assembly.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

In this embodiment, as shown in fig. 1 to 12, the present embodiment provides a multifunctional leak-free pneumatic control high pressure hydraulic directional valve, which includes: a valve seat mechanism 1, a valve block mechanism 2, a valve core mechanism 3 and a pneumatic rod mechanism 4; the valve seat mechanism 1, the valve block mechanism 2 and the pneumatic compression bar mechanism 4 are sequentially arranged from bottom to top; an oil inlet 111, an oil return port 112, a first working port 113 and a second working port 114 are formed in the valve seat mechanism 1; a plurality of oil delivery channels are formed in the valve block mechanism 2, and the oil inlet 111, the oil return port 112, the first working port 113 and the second working port 114 are respectively communicated with the corresponding oil delivery channels; the valve core mechanism 3 is movably arranged in the corresponding oil conveying channel, and the pneumatic compression bar mechanism 4 is connected with the valve core mechanism 3; the pneumatic compression bar mechanism 4 is suitable for pushing the valve core mechanism 3 to act, a part of the oil conveying channels are communicated, and the rest of the oil conveying channels are cut off, so that the oil inlet 111 is communicated with the first working port 113 and the oil return port 112 is communicated with the second working port 114, or the oil inlet 111 is communicated with the second working port 114 and the oil return port 112 is communicated with the first working port 113.

In the present embodiment, P in fig. 12 represents the oil inlet 111, T represents the oil return 112, a represents the first working port 113, and B represents the second working port 114.

In this embodiment, this embodiment is through setting up four oil transportation passageway in valve piece mechanism 2 to every oil transportation passageway is controlled by case mechanism 3, accomplishes that every oil transportation passageway seals alone, improves the leakproofness that fluid flows in the switching-over valve, and four oil transportation passageway cooperation four mouthfuls cross-connection simultaneously, not only can reduce the pressure of case mechanism 3, and can also improve the switching-over precision, reduce the oil leak risk, satisfies chromatographic system long-time pressurize demand under the high pressure operating mode.

In the present embodiment, the valve seat mechanism 1 includes: a valve seat plate 11; the valve seat plate 11 is provided with an oil inlet 111, an oil return 112, a first working port 113 and a second working port 114.

In this embodiment, the valve block mechanism 2 includes: a valve block plate 21; the valve block plate 21 is provided with a first oil conveying channel 211, a second oil conveying channel 212, a third oil conveying channel 213 and a fourth oil conveying channel 214; the first oil delivery channel 211, the second oil delivery channel 212, the third oil delivery channel 213 and the fourth oil delivery channel 214 are respectively provided with a first step groove 2111, a second step groove, a third step groove and a fourth step groove, the first step groove 2111 divides the first oil delivery channel 211 into a first front oil delivery channel 2112 and a first rear oil delivery channel 2113, the second step groove divides the second oil delivery channel 212 into a second front oil delivery channel and a second rear oil delivery channel, the third step groove divides the third oil delivery channel 213 into a third front oil delivery channel and a third rear oil delivery channel, and the fourth step groove divides the fourth oil delivery channel 214 into a fourth front oil delivery channel and a fourth rear oil delivery channel; the oil inlet 111 is communicated with a first rear oil delivery channel 2113 and a fourth rear oil delivery channel, the first front oil delivery channel 2112 is communicated with a third rear oil delivery channel, the third rear oil delivery channel is communicated with a second working port 114, the fourth front oil delivery channel is communicated with a second rear oil delivery channel, the second rear oil delivery channel is communicated with a first working port 113, the second front oil delivery channel is communicated with a third front oil delivery channel, and the second front oil delivery channel and the third front oil delivery channel are communicated with an oil return port 112; the valve core mechanism 3 is located in the first oil delivery channel 211, the second oil delivery channel 212, the third oil delivery channel 213 and the fourth oil delivery channel 214, so as to cut off the first front oil delivery channel 2112 from the first rear oil delivery channel 2113 at the first stepped groove 2111, cut off the second front oil delivery channel from the second rear oil delivery channel at the second stepped groove, cut off the third front oil delivery channel from the third rear oil delivery channel at the third stepped groove, and cut off the fourth front oil delivery channel from the fourth rear oil delivery channel at the fourth stepped groove, namely, the pneumatic pressing rod mechanism 4 is suitable for pushing the valve core mechanism 3 to move in the first oil delivery channel 211 and the second oil delivery channel 212, so that the valve core mechanism 3 opens the first front oil delivery channel 2112 and the first rear oil delivery channel 2113 at the first stepped groove 2111, opens the second front oil delivery channel and the second rear oil delivery channel at the second stepped groove, namely, the oil inlet 111 is communicated with the second working port 114 and the first working port 113; the pneumatic compression bar mechanism 4 is suitable for pushing the valve core mechanism 3 to move in the third oil delivery channel 213 and the fourth oil delivery channel 214, so that the valve core mechanism 3 opens the third front oil delivery channel and the third rear oil delivery channel at the third step groove, and opens the fourth front oil delivery channel and the fourth rear oil delivery channel at the fourth step groove, that is, the oil inlet 111 is communicated with the first working port 113 and the oil return port 112 is communicated with the second working port 114.

In this embodiment, the first step groove 2111, the second step groove, the third step groove and the fourth step groove play a role in limiting, when the valve core mechanism 3 is blocked in the first step groove 2111, the second step groove, the third step groove and the fourth step groove, the first front oil conveying channel 2112 and the first rear oil conveying channel 2113, the second front oil conveying channel and the second rear oil conveying channel, the third front oil conveying channel and the third rear oil conveying channel, and the fourth front oil conveying channel and the fourth rear oil conveying channel can be cut off, otherwise, the first front oil conveying channel 2112 and the first rear oil conveying channel 2113, the second front oil conveying channel and the second rear oil conveying channel, the third front oil conveying channel and the third rear oil conveying channel, and the fourth front oil conveying channel and the fourth rear oil conveying channel can normally circulate.

In the present embodiment, the valve core mechanism 3 includes: a first valve core assembly 31, a second valve core assembly 32, a third valve core assembly 33, a fourth valve core assembly 34; the first valve core assembly 31, the second valve core assembly 32, the third valve core assembly 33 and the fourth valve core assembly 34 are respectively located in the first oil delivery channel 211, the second oil delivery channel 212, the third oil delivery channel 213 and the fourth oil delivery channel 214, that is, the pneumatic compression bar mechanism 4 is suitable for pushing the first valve core assembly 31 and the second valve core assembly 32 to respectively move in the first oil delivery channel 211 and the second oil delivery channel 212, so that the first valve core assembly 31 opens the first front oil delivery channel 2112 and the first rear oil delivery channel 2113 at the first stepped groove 2111, and the second valve core assembly 32 opens the second front oil delivery channel and the second rear oil delivery channel at the second stepped groove; the pneumatic compression bar mechanism 4 is adapted to push the third valve core assembly 33 and the fourth valve core assembly 34 to move in the third oil delivery channel 213 and the fourth oil delivery channel 214 respectively, so that the third valve core assembly 33 opens the third front oil delivery channel and the third rear oil delivery channel at the third step groove, and the fourth valve core assembly 34 opens the fourth front oil delivery channel and the fourth rear oil delivery channel at the fourth step groove.

In this embodiment, the first valve core assembly 31 and the second valve core assembly 32 operate synchronously, the third valve core assembly 33 and the fourth valve core assembly 34 operate synchronously, and when the first valve core assembly 31 and the second valve core assembly 32 operate, the third valve core assembly 33 and the fourth valve core assembly 34 are reset, or when the first valve core assembly 31 and the second valve core assembly 32 are reset, the third valve core assembly 33 and the fourth valve core assembly 34 operate, so that the oil can be commutated in the reversing valve.

In this embodiment, the first valve element assembly 31 includes: the first valve core plug 311, the first valve core steel ball 312, the first valve core thimble 313, the first thimble side plug 314 and the first thimble gland 315; the first valve core plugs 311 and the first thimble side plugs 314 are respectively movably arranged at two sides of the first oil transportation channel 211, the first valve core steel balls 312 and the first thimble pressing covers 315 are respectively fixed at two sides of the first valve core thimble 313, the first valve core steel balls 312 are positioned in the first front oil transportation channel 2112, and the first valve core thimble 313 passes through the first thimble side plugs 314 so that the first thimble pressing covers 315 are exposed out of the first oil transportation channel 211; the first valve plug 311 is adapted to press the first valve ball 312, such that the first valve ball 312 plugs the first stepped groove 2111 to cut off the first front oil delivery channel 2112 and the first rear oil delivery channel 2113; the pneumatic compression bar mechanism 4 is adapted to push the first thimble gland 315 to press the first thimble side plug 314, so as to drive the first valve core thimble 313 to move towards the first front oil delivery channel 2112, and further drive the first valve core steel ball 312 to press the first valve core plug 311 to move, so as to open the first front oil delivery channel 2112 and the first rear oil delivery channel 2113.

In this embodiment, the first valve core plug 311 and the first thimble-side plug 314 are elastic bellows, and the first valve core plug 311 and the first thimble-side plug 314 are installed in the first oil delivery channel 211 through corresponding sealing elements.

In this embodiment, the first valve core assembly 31, the second valve core assembly 32, the third valve core assembly 33, and the fourth valve core assembly 34 are respectively sealed by corresponding sealing members, so that the sealing effect can be improved, and the first valve core plug 311, the first thimble side plug 314, the second valve core plug, the second thimble side plug, the third valve core plug, the third thimble side plug, the fourth valve core plug, and the fourth thimble side plug adopt elastic bellows, can be deformed by extrusion, and can be reset after the main power is removed, and the structure is simple and efficient.

In this embodiment, the second spool assembly 32 includes: the second valve core plug, the second valve core steel ball, the second valve core thimble, the second thimble side plug and the second thimble gland; the second valve core plug and the second thimble side plug are respectively and movably arranged at two sides of the second oil transportation channel 212, the second valve core steel ball and the second thimble gland are respectively fixed at two sides of the second valve core thimble, the second valve core steel ball is positioned in the second front oil transportation channel, and the second valve core thimble passes through the second thimble side plug to expose the second thimble gland from the second oil transportation channel 212; the second valve core plug is suitable for extruding the second valve core steel ball, so that the second valve core steel ball plugs the second front oil conveying channel and the second rear oil conveying channel at the second stepped groove to cut off the second front oil conveying channel and the second rear oil conveying channel; the pneumatic compression bar mechanism 4 is suitable for pushing the second thimble gland to extrude the second thimble side plug so as to drive the second valve core thimble to move towards the second front oil delivery channel, and further drive the second valve core steel ball to extrude the second valve core plug to move so as to open the second front oil delivery channel and the second rear oil delivery channel; the third valve element assembly 33 includes: the third valve core plug, the third valve core steel ball, the third valve core thimble, the third thimble side plug and the third thimble gland; the third valve core plugs and the third thimble side plugs are respectively movably arranged at two sides of the third oil conveying channel 213, the third valve core steel ball and the third thimble gland are respectively fixed at two sides of the third valve core thimble, the third valve core steel ball is positioned in the third front oil conveying channel, and the third valve core thimble passes through the third thimble side plugs to expose the third thimble gland from the third oil conveying channel 213; the third valve core plug is suitable for extruding the third valve core steel ball, so that the third valve core steel ball plugs a third front oil conveying channel and a third rear oil conveying channel at a third step groove to cut off the third front oil conveying channel and the third rear oil conveying channel; the pneumatic compression bar mechanism 4 is suitable for pushing against a third thimble gland to extrude a third thimble side plug so as to drive the third valve core thimble to move towards a third front oil transportation channel, and further drive the third valve core steel ball to extrude the third valve core plug to move so as to open the third front oil transportation channel and the third rear oil transportation channel; the fourth spool assembly 34 includes: the fourth valve core plug, the fourth valve core steel ball, the fourth valve core thimble, the fourth thimble side plug and the fourth thimble gland; the fourth valve core plug and the fourth thimble side plug are respectively and movably arranged at two sides of the fourth oil transportation channel 214, the fourth valve core steel ball and the fourth thimble gland are respectively fixed at two sides of the fourth valve core thimble, the fourth valve core steel ball is positioned in the fourth front oil transportation channel, and the fourth valve core thimble passes through the fourth thimble side plug to expose the fourth thimble gland from the fourth oil transportation channel 214; the fourth valve core plug is suitable for extruding a fourth valve core steel ball, so that the fourth valve core steel ball plugs a fourth front oil conveying channel and a fourth rear oil conveying channel at a fourth stepped groove; the pneumatic compression bar mechanism 4 is suitable for pushing the fourth thimble gland to extrude the fourth thimble side plug so as to drive the fourth valve core thimble to move towards the fourth front oil transportation channel, and further drive the fourth valve core steel ball to extrude the fourth valve core plug to move so as to open the fourth front oil transportation channel and the fourth rear oil transportation channel.

In this embodiment, the pneumatic compression bar mechanism 4 includes: a first pneumatic ram assembly 41, a second pneumatic ram assembly 42; the first pneumatic rod assembly 41 is adapted to push the first thimble pressing cover 315 and the second thimble pressing cover to respectively press the first thimble side plug 314 and the second thimble side plug, so as to drive the first valve core thimble 313 and the second valve core thimble to respectively move towards the first front oil transportation channel 2112 and the second front oil transportation channel, and further drive the first valve core steel ball 312 and the second valve core steel ball to respectively press the first valve core plug 311 and the second valve core plug to move, so as to open the first front oil transportation channel 2112 and the first rear oil transportation channel 2113, and open the second front oil transportation channel and the second rear oil transportation channel; the second pneumatic compression bar assembly 42 is adapted to push against the third thimble gland and the fourth thimble gland to respectively extrude the third thimble side plug and the fourth thimble side plug, so as to drive the third valve core thimble and the fourth valve core thimble to respectively move towards the third front oil transportation channel and the fourth front oil transportation channel, and further drive the third valve core steel ball and the fourth valve core steel ball to respectively extrude the third valve core plug and the fourth valve core plug to move, so as to open the third front oil transportation channel and the third rear oil transportation channel, and open the fourth front oil transportation channel and the fourth rear oil transportation channel.

In the present embodiment, fig. 12 a and b show a first pneumatic ram assembly 41 and a second pneumatic ram assembly 42, respectively.

In this embodiment, the first pneumatic lever assembly 41 includes: the first cylinder bottom frame 411, the first cylinder barrel 412, the first piston 413, the first bolt 414, the first top block 415 and the first Y-shaped swing rod 416; the first cylinder barrel 412 is mounted on the first cylinder chassis 411, and a first mounting cavity is formed in the first cylinder chassis 411 and the first cylinder barrel 412 for mounting the first piston 413, the first bolt 414 and the first top block 415; the first piston 413 is sleeved on the first bolt 414, the bottom of the first bolt 414 is connected with the first top block 415, and a first set of springs 417 is arranged between the bottom of the first piston 413 and the first top block 415; a first pressing groove 4151 is formed in the top of the first top block 415, and a first pressing wheel 418 is hinged in the first pressing groove 4151; the concentrated end of the first Y-shaped swing rod 416 is located below the first pressing wheel 418, and two bifurcation ends of the first Y-shaped swing rod 416 are respectively abutted against the first thimble pressing cover 315 and the second thimble pressing cover; the first cylinder barrel 412 drives the first piston 413 to press the first set of springs 417 to move downwards on the first bolt 414, so that the first set of springs 417 presses the first ejector block 415, and further drives the first pressing wheel 418 to press the concentrated end of the first Y-shaped swing rod 416 to swing the first Y-shaped swing rod 416, and two bifurcated ends of the first Y-shaped swing rod 416 respectively press the first ejector pin gland 315 and the second ejector pin gland.

In this embodiment, the swing of the first Y-shaped swing rod 416 can implement the synchronous action of the first thimble gland 315 and the second thimble gland, and the first cylinder barrel 412, the first piston 413, the first bolt 414 and the first top block 415 can push the first Y-shaped swing rod 416 to swing under the linkage.

In this embodiment, the second pneumatic ram assembly 42 includes: the second cylinder bottom frame, the second cylinder barrel, the second piston, the second bolt, the second top block and the second Y-shaped swing rod; the second cylinder barrel is arranged on the second cylinder underframe, and a second mounting cavity is formed in the second cylinder underframe and the second cylinder barrel and used for mounting the second piston, the second bolt and the second top block; the second piston is sleeved on the second bolt, the bottom of the second bolt is connected with the second top block, and a second sleeve spring is arranged between the bottom of the second piston and the second top block; a second pressing groove is formed in the top of the second top block, and a second pressing wheel is hinged in the second pressing groove; the concentrated end of the second Y-shaped swing rod is positioned below the second pressing wheel, and the two bifurcation ends of the second Y-shaped swing rod are respectively propped against the third thimble gland and the fourth thimble gland; the second cylinder barrel drives the second piston to extrude the second set of springs to move downwards on the second bolt, so that the second set of springs are propped against the second ejector block, the second pressing wheel is further driven to prop against the concentrated end of the second Y-shaped swing rod, the second Y-shaped swing rod swings, and the two forked ends of the second Y-shaped swing rod respectively prop against the third ejector pin gland and the fourth ejector pin gland.

In the embodiment, the swinging of the second Y-shaped swinging rod can realize the synchronous action of the third thimble gland and the fourth thimble gland, and the second Y-shaped swinging rod can be pushed to swing under the linkage of the second cylinder barrel, the second piston, the second bolt and the second ejector block.

In this embodiment, the first cylinder 412 and the second cylinder are driven by compressed air, so that the driving air pressure is small, the control mode is flexible, the mounting and control positions are highly selective, and the device is suitable for explosion-proof environment, clean environment and remote control.

In summary, the four oil delivery channels are arranged in the valve block mechanism, each oil delivery channel is controlled by the valve core mechanism, each oil delivery channel is independently sealed, the sealing performance of oil flowing in the reversing valve is improved, meanwhile, the four oil delivery channels are matched with four ports for cross communication, the pressure of the valve core mechanism can be reduced, the reversing precision can be improved, the oil leakage risk is reduced, and the long-time pressure maintaining requirement of a chromatographic system under a high-pressure working condition is met.

The components (components not illustrating specific structures) selected in the application are all common standard components or components known to those skilled in the art, and the structures and principles of the components are all known to those skilled in the art through technical manuals or through routine experimental methods. Moreover, the software programs referred to in the present application are all prior art, and the present application does not relate to any improvement of the software programs.

In the description of embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (10)

1. A multi-functional leak-free pneumatic control high pressure hydraulic reversing valve, comprising:

the valve seat mechanism, the valve block mechanism, the valve core mechanism and the pneumatic rod pressing mechanism; wherein the method comprises the steps of

The valve seat mechanism, the valve block mechanism and the pneumatic compression bar mechanism are sequentially arranged from bottom to top;

an oil inlet, an oil return port, a first working port and a second working port are formed in the valve seat mechanism;

the valve block mechanism is internally provided with a plurality of oil conveying channels, and the oil inlet, the oil return port, the first working port and the second working port are respectively communicated with the corresponding oil conveying channels;

the valve core mechanism is movably arranged in the corresponding oil conveying channel, and the pneumatic compression bar mechanism is connected with the valve core mechanism;

the pneumatic compression bar mechanism is suitable for pushing the valve core mechanism to act, a part of the oil conveying channels are communicated, and the rest of the oil conveying channels are cut off, so that the oil inlet is communicated with the first working port and the oil return port is communicated with the second working port, or the oil inlet is communicated with the second working port and the oil return port is communicated with the first working port.

2. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 1, wherein,

the valve seat mechanism includes: a valve seat plate;

an oil inlet, an oil return port, a first working port and a second working port are formed in the valve seat plate.

3. A multi-functional leak-free pneumatic control high pressure hydraulic reversing valve according to claim 2, wherein,

the valve block mechanism includes: a valve block plate;

the valve block plate is provided with a first oil conveying channel, a second oil conveying channel, a third oil conveying channel and a fourth oil conveying channel;

the first oil transportation channel is divided into a first front oil transportation channel and a first rear oil transportation channel by the first step groove, the second oil transportation channel is divided into a second front oil transportation channel and a second rear oil transportation channel by the second step groove, the third oil transportation channel is divided into a third front oil transportation channel and a third rear oil transportation channel by the third step groove, and the fourth oil transportation channel is divided into a fourth front oil transportation channel and a fourth rear oil transportation channel by the fourth step groove;

the oil inlet is communicated with a first rear oil conveying channel and a fourth rear oil conveying channel, the first front oil conveying channel is communicated with a third rear oil conveying channel, the third rear oil conveying channel is communicated with a second working port, the fourth front oil conveying channel is communicated with a second rear oil conveying channel, the second rear oil conveying channel is communicated with the first working port, the second front oil conveying channel is communicated with the third front oil conveying channel, and the second front oil conveying channel is communicated with an oil return port;

The valve core mechanism is positioned in the first oil delivery channel, the second oil delivery channel, the third oil delivery channel and the fourth oil delivery channel to cut off the first front oil delivery channel and the first rear oil delivery channel at the first step groove, cut off the second front oil delivery channel and the second rear oil delivery channel at the second step groove, cut off the third front oil delivery channel and the third rear oil delivery channel at the third step groove and cut off the fourth front oil delivery channel and the fourth rear oil delivery channel at the fourth step groove respectively, namely

The pneumatic compression bar mechanism is suitable for pushing the valve core mechanism to move in the first oil delivery channel and the second oil delivery channel, so that the valve core mechanism opens the first front oil delivery channel and the first rear oil delivery channel at the first step groove and opens the second front oil delivery channel and the second rear oil delivery channel at the second step groove, namely

The oil inlet is communicated with the second working port, and the oil return port is communicated with the first working port;

the pneumatic compression bar mechanism is suitable for pushing the valve core mechanism to move in the third oil delivery channel and the fourth oil delivery channel, so that the valve core mechanism opens the third front oil delivery channel and the third rear oil delivery channel at the third step groove and opens the fourth front oil delivery channel and the fourth rear oil delivery channel at the fourth step groove, namely

The oil inlet is communicated with the first working port, and the oil return port is communicated with the second working port.

4. A multi-functional leak-free pneumatic control high pressure hydraulic reversing valve according to claim 3, wherein,

the valve core mechanism comprises: the first valve core component, the second valve core component, the third valve core component and the fourth valve core component;

the first valve core component, the second valve core component, the third valve core component and the fourth valve core component are respectively positioned in the first oil transportation channel, the second oil transportation channel, the third oil transportation channel and the fourth oil transportation channel, namely

The pneumatic compression bar mechanism is suitable for pushing the first valve core component and the second valve core component to move in the first oil conveying channel and the second oil conveying channel respectively, so that the first valve core component opens the first front oil conveying channel and the first rear oil conveying channel at the first step groove, and the second valve core component opens the second front oil conveying channel and the second rear oil conveying channel at the second step groove;

the pneumatic compression bar mechanism is suitable for pushing the third valve core assembly and the fourth valve core assembly to move in the third oil conveying channel and the fourth oil conveying channel respectively, so that the third valve core assembly opens the third front oil conveying channel and the third rear oil conveying channel at the third step groove, and the fourth valve core assembly opens the fourth front oil conveying channel and the fourth rear oil conveying channel at the fourth step groove.

5. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 4, wherein,

the first spool assembly includes: the first valve core plug, the first valve core steel ball, the first valve core thimble, the first thimble side plug and the first thimble gland;

the first valve core plug and the first thimble side plug are respectively and movably arranged at two sides of the first oil transportation channel, the first valve core steel ball and the first thimble gland are respectively fixed at two sides of the first valve core thimble, the first valve core steel ball is positioned in the first front oil transportation channel, and the first valve core thimble passes through the first thimble side plug to enable the first thimble gland to be exposed out of the first oil transportation channel;

the first valve core plug is suitable for extruding the first valve core steel ball, so that the first valve core steel ball plugs the first stepped groove to cut off the first front oil conveying channel and the first rear oil conveying channel;

the pneumatic compression bar mechanism is suitable for pushing the first thimble gland to extrude the first thimble side plug so as to drive the first valve core thimble to move towards the first front oil conveying channel, and further drive the first valve core steel ball to extrude the first valve core plug to move so as to open the first front oil conveying channel and the first rear oil conveying channel.

6. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 5, wherein,

the first valve core plug and the first thimble side plug are both elastic corrugated pipes, and the first valve core plug and the first thimble side plug are installed in the first oil transportation channel through corresponding sealing pieces.

7. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 5, wherein,

the second spool assembly includes: the second valve core plug, the second valve core steel ball, the second valve core thimble, the second thimble side plug and the second thimble gland;

the second valve core plug and the second thimble side plug are respectively and movably arranged at two sides of the second oil transportation channel, the second valve core steel ball and the second thimble gland are respectively fixed at two sides of the second valve core thimble, the second valve core steel ball is positioned in the second front oil transportation channel, and the second valve core thimble passes through the second thimble side plug to expose the second thimble gland from the second oil transportation channel;

the second valve core plug is suitable for extruding the second valve core steel ball, so that the second valve core steel ball plugs the second front oil conveying channel and the second rear oil conveying channel at the second stepped groove to cut off the second front oil conveying channel and the second rear oil conveying channel;

The pneumatic compression bar mechanism is suitable for pushing the second thimble gland to extrude the second thimble side plug so as to drive the second valve core thimble to move towards the second front oil delivery channel, and further drive the second valve core steel ball to extrude the second valve core plug to move so as to open the second front oil delivery channel and the second rear oil delivery channel;

the third valve core assembly includes: the third valve core plug, the third valve core steel ball, the third valve core thimble, the third thimble side plug and the third thimble gland;

the third valve core plug and the third thimble side plug are respectively and movably arranged at two sides of the third oil transportation channel, the third valve core steel ball and the third thimble gland are respectively fixed at two sides of the third valve core thimble, the third valve core steel ball is positioned in the third front oil transportation channel, and the third valve core thimble passes through the third thimble side plug to expose the third thimble gland from the third oil transportation channel;

the third valve core plug is suitable for extruding the third valve core steel ball, so that the third valve core steel ball plugs a third front oil conveying channel and a third rear oil conveying channel at a third step groove to cut off the third front oil conveying channel and the third rear oil conveying channel;

the pneumatic compression bar mechanism is suitable for pushing the third thimble gland to extrude the third thimble side plug so as to drive the third valve core thimble to move towards the third front oil transportation channel, and further drive the third valve core steel ball to extrude the third valve core plug to move so as to open the third front oil transportation channel and the third rear oil transportation channel;

The fourth spool assembly includes: the fourth valve core plug, the fourth valve core steel ball, the fourth valve core thimble, the fourth thimble side plug and the fourth thimble gland;

the fourth valve core plug and the fourth thimble side plug are respectively and movably arranged at two sides of the fourth oil transportation channel, the fourth valve core steel ball and the fourth thimble gland are respectively fixed at two sides of the fourth valve core thimble, the fourth valve core steel ball is positioned in the fourth front oil transportation channel, and the fourth valve core thimble passes through the fourth thimble side plug to expose the fourth thimble gland from the fourth oil transportation channel;

the fourth valve core plug is suitable for extruding a fourth valve core steel ball, so that the fourth valve core steel ball plugs a fourth front oil conveying channel and a fourth rear oil conveying channel at a fourth stepped groove;

the pneumatic compression bar mechanism is suitable for pushing the fourth thimble gland to extrude the fourth thimble side plug so as to drive the fourth valve core thimble to move towards the fourth front oil conveying channel, and further drive the fourth valve core steel ball to extrude the fourth valve core plug to move so as to open the fourth front oil conveying channel and the fourth rear oil conveying channel.

8. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 7, wherein,

The pneumatic compression bar mechanism comprises: the first pneumatic pressure bar assembly and the second pneumatic pressure bar assembly;

the first pneumatic pressing rod assembly is suitable for pushing the first thimble pressing cover and the second thimble pressing cover to respectively extrude the first thimble side plug and the second thimble side plug so as to drive the first valve core thimble and the second valve core thimble to respectively move towards the first front oil transportation channel and the second front oil transportation channel, and further drive the first valve core steel ball and the second valve core steel ball to respectively extrude the first valve core plug and the second valve core plug to move so as to open the first front oil transportation channel and the first rear oil transportation channel and open the second front oil transportation channel and the second rear oil transportation channel;

the second pneumatic compression bar assembly is suitable for pushing the third thimble gland and the fourth thimble gland to respectively extrude the third thimble side plug and the fourth thimble side plug so as to drive the third valve core thimble and the fourth valve core thimble to respectively move towards the third front oil transportation channel and the fourth front oil transportation channel, and further drive the third valve core steel ball and the fourth valve core steel ball to respectively extrude the third valve core plug and the fourth valve core plug to move so as to open the third front oil transportation channel and the third rear oil transportation channel and the fourth front oil transportation channel and the fourth rear oil transportation channel.

9. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 8, wherein,

the first pneumatic ram assembly includes: the device comprises a first cylinder underframe, a first cylinder barrel, a first piston, a first bolt, a first top block and a first Y-shaped swing rod;

the first cylinder barrel is arranged on the first cylinder underframe, and a first mounting cavity is formed in the first cylinder underframe and the first cylinder barrel and used for mounting the first piston, the first bolt and the first top block;

the first piston is sleeved on the first bolt, the bottom of the first bolt is connected with the first top block, and a first set of springs are arranged between the bottom of the first piston and the first top block;

a first pressing groove is formed in the top of the first top block, and a first pressing wheel is hinged in the first pressing groove;

the concentrated end of the first Y-shaped swing rod is positioned below the first pressing wheel, and the two bifurcation ends of the first Y-shaped swing rod are respectively propped against the first thimble gland and the second thimble gland;

the first cylinder barrel drives the first piston to extrude the first set of springs to move downwards on the first bolt, so that the first set of springs are propped against the first ejector block, the first pressing wheel is driven to prop against the concentrated end of the first Y-shaped swing rod, the first Y-shaped swing rod swings, and the two forked ends of the first Y-shaped swing rod respectively prop against the first ejector pin gland and the second ejector pin gland.

10. The multi-functional leak-free pneumatic control high pressure hydraulic reversing valve of claim 9, wherein,

the second pneumatic ram assembly includes: the second cylinder bottom frame, the second cylinder barrel, the second piston, the second bolt, the second top block and the second Y-shaped swing rod;

the second cylinder barrel is arranged on the second cylinder underframe, and a second mounting cavity is formed in the second cylinder underframe and the second cylinder barrel and used for mounting the second piston, the second bolt and the second top block;

the second piston is sleeved on the second bolt, the bottom of the second bolt is connected with the second top block, and a second sleeve spring is arranged between the bottom of the second piston and the second top block;

a second pressing groove is formed in the top of the second top block, and a second pressing wheel is hinged in the second pressing groove;

the concentrated end of the second Y-shaped swing rod is positioned below the second pressing wheel, and the two bifurcation ends of the second Y-shaped swing rod are respectively propped against the third thimble gland and the fourth thimble gland;

the second cylinder barrel drives the second piston to extrude the second set of springs to move downwards on the second bolt, so that the second set of springs are propped against the second ejector block, the second pressing wheel is further driven to prop against the concentrated end of the second Y-shaped swing rod, the second Y-shaped swing rod swings, and the two forked ends of the second Y-shaped swing rod respectively prop against the third ejector pin gland and the fourth ejector pin gland.

Images