CN218326478U

CN218326478U - Manual pilot valve

Info

Publication number: CN218326478U
Application number: CN202222083123.9U
Authority: CN
Inventors: 钟静
Original assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Current assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2023-01-17
Anticipated expiration: 2032-08-09

Abstract

The utility model discloses a manual formula pilot valve, including the valve piece, the top middle part of valve piece articulates there is criss-cross handle, the valve piece is equipped with two parallel and vertical step holes that run through, install first case respectively in two step holes, the second case, first case is the same with the size structure of second case, the bottom of valve piece is equipped with the A hydraulic fluid port, the B hydraulic fluid port, the A hydraulic fluid port, the B hydraulic fluid port communicates with the lower port in step hole respectively, the right side of valve piece is equipped with the T hydraulic fluid port, the P hydraulic fluid port, the inside of valve piece is equipped with horizontal first oil circuit, the second oil circuit, the upper segment in two step holes of first oil circuit intercommunication and communicate with the T hydraulic fluid port, the hypomere in two step holes of second oil circuit intercommunication and communicate with the P hydraulic fluid port. This pilot valve adopts the switch-on state of four hydraulic fluid ports of handle control, and through brake valve lever's amplitude of rotation, can control the pressure that switches on the oil circuit moreover, control accurate, convenient operation, the structure of this pilot valve is simpler in addition, and the quality is lighter, is favorable to having saved manufacturing cost.

Description

Manual pilot valve

Technical Field

The utility model relates to a hydrovalve technical field specifically is a manual formula pilot valve.

Background

At present, engineering machinery such as loaders, bulldozers, cranes, backhoe loaders and the like widely adopt manual pilot valves, and pilot oil provided by the manual pilot valves controls a main control valve core to move so as to control lifting and descending of a movable arm and bucket collection and unloading. At present, manual pilot valves are generally of multi-rod and multi-piece structures, are complex in structure and high in manufacturing cost, and control over output pressure is not accurate enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a manual formula pilot valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a cross-shaped handle is hinged to the middle of the upper portion of the valve block, the valve block is provided with two parallel and vertically-penetrating step holes, the diameter of the upper section of each step hole is larger than that of the lower section of each step hole, a first valve core and a second valve core are respectively installed in the two step holes, the first valve core and the second valve core are identical in size structure, each first valve core comprises a plunger, the upper end of each plunger abuts against the corresponding handle, a clamping seat is fixedly connected to the top of the inner cavity of each plunger, a spring is connected to the bottom of each clamping seat, a core column concentric with each clamping seat is fixedly connected to the middle of each clamping seat, the core column is in matched plug-in connection with the lower end of each step hole, an axial blind hole is formed in the lower portion of each core column, and a penetrating radial oil hole is formed in the upper end of each blind hole;

the bottom of the valve block is provided with an oil port A and an oil port B, the oil port A and the oil port B are respectively communicated with the lower end ports of the stepped holes, the right side of the valve block is provided with a T oil port and a P oil port, a transverse first oil path and a transverse second oil path are arranged inside the valve block, the first oil path is communicated with the upper sections of the two stepped holes and is communicated with the T oil port, and the second oil path is communicated with the lower sections of the two stepped holes and is communicated with the P oil port.

Preferably, the upper end of the valve block is provided with a dustproof sleeve, and the handle penetrates through the dustproof sleeve.

Preferably, the stem is provided with a first ring groove at the radial oil hole, and the step hole is provided with a second ring groove at the port of the second oil path.

Compared with the prior art, the beneficial effects of the utility model are that: this pilot valve adopts the switch-on state of four hydraulic fluid ports of handle control, and amplitude of rotation through brake valve handle moreover can control the pressure that switches on the oil circuit, and control is accurate and convenient, and the structure of this pilot valve is simpler in addition, and the quality is lighter, is favorable to having saved manufacturing cost.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic side view of the present invention;

fig. 3 is a hydraulic schematic diagram of the present invention.

In the figure: 1. a valve block; 2. a handle; 3. a dust-proof sleeve; 4. a first valve spool; 41. a plunger; 42. a spring; 43. a stem; 44. a card holder; 45. blind holes; 5. a second valve core; 6. a first oil passage; 7. and a second oil passage.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a manual formula pilot valve, includes valve piece 1, and the top middle part of valve piece 1 articulates there is criss-cross handle 2, and dirt proof boot 3 is installed to the upper end of valve piece 1, and handle 2 runs through from dirt proof boot 3. The valve block 1 is provided with two parallel and vertically-through step holes, the diameter of the upper section of each step hole is larger than that of the lower section of each step hole, namely, the upper section of each step hole is of a structure with a thick upper part and a thin lower part, the two step holes are internally provided with a first valve core 4 and a second valve core 5 respectively, the first valve core 4 and the second valve core 5 are identical in size and structure, and the first valve core 4 and the second valve core 5 can be in sliding connection with the corresponding step holes respectively.

The first valve core 4 comprises a plunger 41, the plunger 41 is in sliding connection with the upper section of the stepped hole in an adaptive mode, the upper end of the plunger 41 abuts against the handle 2, a clamping seat 44 is fixedly connected to the top of an inner cavity of the plunger 41, a spring 42 is connected to the bottom of the clamping seat 44, a core column 43 which is concentric with the clamping seat 44 is fixedly connected to the middle of the clamping seat 44, the core column 43 is in matched insertion connection with the lower end of the stepped hole, an axial blind hole 45 is formed in the lower portion of the core column 43, a through radial oil hole is formed in the upper end of the blind hole 45, and upward thrust is exerted on the clamping seat 44 and the plunger 41 by the spring 42.

The bottom of the valve block 1 is provided with an oil port A and an oil port B, the oil port A and the oil port B are respectively communicated with lower ports of the step holes, the right side of the valve block 1 is provided with a T oil port and a P oil port, a transverse first oil path 6 and a transverse second oil path 7 are arranged inside the valve block 1, the first oil path 6 is communicated with the upper sections of the two step holes and is communicated with the T oil port, the second oil path 7 is communicated with the lower sections of the two step holes and is communicated with the P oil port, a first annular groove is arranged at the radial oil hole of the stem column 43, and a second annular groove is arranged at the port of the second oil path 7 of the step hole. The stem 43 moves up and down to switch the conduction of the blind hole 45 with the stepped hole or the second oil path 7.

The working principle is as follows: when the handle 2 is in the middle position, the plunger 41 and the core column 43 are in the upper position, and the blind hole 45 is communicated with the stepped hole, namely an oil port A-T oil port and an oil port B-T oil port are communicated; when the handle 2 is pulled to the left position, the first valve core 4 moves downwards to plug the left end of the first oil way 6, meanwhile, the blind hole 45 is communicated with the second annular groove through a radial oil hole at the top of the blind hole, namely, an oil port A is communicated with an oil port P, and in addition, an oil port B is communicated with an oil port T; when the handle 2 is pulled to the right position, the second valve core 5 moves downwards to block the oil port T, and meanwhile, the oil port B and the oil port P are communicated. The larger the pulling angle of the handle 2 is, the larger the stroke of the valve core is, and the larger the output oil pressure is.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a manual formula pilot valve, includes valve block (1), and the top middle part of valve block (1) articulates there is criss-cross handle (2), its characterized in that: the valve block (1) is provided with two parallel and vertically-penetrating stepped holes, the diameter of the upper section of each stepped hole is larger than that of the lower section of each stepped hole, a first valve core (4) and a second valve core (5) are respectively installed in the two stepped holes, the first valve core (4) and the second valve core (5) are identical in size and structure, the first valve core (4) comprises a plunger (41), the upper end of the plunger (41) abuts against the handle (2), the top of an inner cavity of the plunger (41) is fixedly connected with a clamping seat (44), the bottom of the clamping seat (44) is connected with a spring (42), the middle of the clamping seat (44) is fixedly connected with a core column (43) which is concentric with the clamping seat, the core column (43) is in matched and inserted connection with the lower end of the stepped hole, the lower part of the core column (43) is provided with an axial blind hole (45), and the upper end of the blind hole (45) is provided with a penetrating radial oil hole;

the bottom of valve block (1) is equipped with A hydraulic fluid port, B hydraulic fluid port, A hydraulic fluid port, B hydraulic fluid port communicate with the lower port in step hole respectively, and the right side of valve block (1) is equipped with T hydraulic fluid port, P hydraulic fluid port, the inside of valve block (1) is equipped with horizontal first oil circuit (6), second oil circuit (7), first oil circuit (6) communicate the upper segment in two step holes and communicate with T hydraulic fluid port, second oil circuit (7) communicate the hypomere in two step holes and communicate with P hydraulic fluid port.

2. A manual pilot valve according to claim 1, characterized in that: the dustproof sleeve (3) is installed at the upper end of the valve block (1), and the handle (2) penetrates through the dustproof sleeve (3).

3. A manual pilot valve according to claim 1, characterized in that: the stem (43) is equipped with first annular at radial oil hole department, the step hole is equipped with the second annular in the port department of second oil circuit (7).