CN214466541U

CN214466541U - Electromagnetic overflow valve control cover plate

Info

Publication number: CN214466541U
Application number: CN202022783524.6U
Authority: CN
Inventors: 朱剑根; 金丹; 马欲宏; 谷文平
Original assignee: Shanghai Lixin Hydraulics Co ltd
Current assignee: Shanghai Lixin Hydraulics Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-10-22
Anticipated expiration: 2030-11-26

Abstract

The utility model discloses a control cover plate of an electromagnetic overflow valve, which comprises a valve block, a plug, a direct-acting overflow valve component and a sealing ring component; the plug is arranged on one side of the valve block; the direct-acting overflow valve assembly is arranged on the other side of the valve block; the sealing ring is arranged inside the valve block. According to the scheme, the valve block is internally provided with the plurality of damping holes, so that the flow of pilot control oil can be limited, the impact of the valve during working is avoided, the buffering effect is achieved, and the phenomenon of squealing caused by the large flow of the pilot control oil when the large flow of the pilot control oil passes through the pilot valve core is avoided; secondly, this device compact structure, small has the characteristics that the through flow is big.

Description

Electromagnetic overflow valve control cover plate

Technical Field

The utility model relates to a machine-building technical field, concretely relates to electromagnetic overflow valve control apron.

Background

In hydraulic equipment, an electromagnetic overflow valve is favored by a plurality of users because the electromagnetic overflow valve can play the roles of constant-pressure overflow, system unloading and safety protection.

The conventional electromagnetic overflow valve has insufficient through flow, and can generate squeal phenomenon in certain use occasions with severe working conditions, such as engineering machinery, and the like, wherein the working conditions are large in temperature change.

Therefore, a novel electromagnetic overflow valve control cover plate capable of solving the limitation that the flow rate of a common electromagnetic overflow valve is not large and preventing squeal is urgently needed.

SUMMERY OF THE UTILITY MODEL

To there being the technical problem that the through flow greatly makes to have to be made in current electromagnetic overflow valve, the utility model aims to provide an electromagnetic overflow valve control apron, its fine solution foretell technical problem.

In order to achieve the purpose, the utility model provides an electromagnetic overflow valve control cover plate, which comprises a valve block, a plug, a direct-acting overflow valve component and a sealing ring component; the plug is arranged on one side of the valve block; the direct-acting overflow valve assembly is arranged on the other side of the valve block; the sealing ring is arranged inside the valve block.

Furthermore, a first flow passage, a first damping hole, a central flow passage, a second stepped hole, a second flow passage, a second damping hole, a threaded insertion hole, a third flow passage, a first pilot oil passage, a second pilot oil passage and a pilot oil outlet passage are arranged in the valve block; the process inclined hole, the process straight hole and the third damping hole;

one side of the central flow passage is provided with a plug, and the other side of the central flow passage is connected with the direct overflow valve assembly through a threaded plug-in hole;

the bottom of the inclined hole of the first flow channel is provided with a first damping hole and is communicated with the central flow channel; the central flow passage is communicated with the thread insertion hole; the threaded plug-in hole is communicated with the third flow channel;

a second flow passage is arranged at the bottom of the second stepped hole; the second flow channel is an inclined hole, and the bottom of the second flow channel is provided with a second damping hole and communicated with the central flow channel;

the bottom of the first pilot oil way is provided with a third damping hole and is communicated with the central flow channel;

the second pilot oil way is communicated with the process straight hole;

the process straight hole is communicated with the process inclined hole; the process inclined hole is respectively communicated with the pilot oil outlet path and the thread insertion hole.

Further, the seal ring assembly comprises a fifth seal ring, a sixth seal ring and a seventh seal ring; the fifth sealing ring is arranged in the third flow channel; the sixth sealing ring is arranged in the first flow passage; the seventh seal ring is mounted in the valve block.

Further, the direct overflow valve assembly comprises a first sealing ring, a valve seat, a valve sleeve, a second sealing ring, a guide valve core, a third sealing ring, a spring, a fourth sealing ring, a steel wire check ring, an adjusting rod and a valve seat hole;

the first sealing ring is arranged on the side end face of the valve seat in a matching way; the second sealing ring is arranged in the excircle of the valve seat in a matching way;

the excircle of the valve seat is matched and connected with the inner hole of the valve sleeve; the spring is sleeved on the guide valve core and is arranged in the adjusting rod together; the outer circle of the adjusting rod is provided with a fourth sealing ring and then is arranged in the inner hole of the valve sleeve together to be matched and connected with the outer circle of the valve seat;

a steel wire check ring is additionally arranged in the inner hole of the valve sleeve; the end part of the guide valve core is arranged on the valve seat hole; and the third sealing ring is arranged in the excircle of the valve sleeve and is arranged in the screw hole insertion hole together.

The utility model provides a pair of electromagnetic overflow valve control apron, it has the big characteristics of through-flow and through inside a plurality of damping holes that set up at the valve block, has avoided big pilot control oil flow to cause the phenomenon of squealing when passing through the guide valve core.

Drawings

The invention is further described with reference to the following drawings and detailed description.

FIG. 1 is a schematic diagram of the structure of the electromagnetic overflow valve control cover plate;

FIG. 2 is a schematic top view of a valve block in the electromagnetic spill valve control cover plate;

FIG. 3 is a cross-sectional view of M-M of FIG. 2;

fig. 4 is a schematic diagram of the hydraulic principle applied to the electromagnetic overflow valve control cover plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

The electromagnetic overflow valve control cover plate 600 provided by the scheme is shown in fig. 1 and comprises a valve block 100, a plug 200, a direct-acting overflow valve assembly 300 and a sealing ring assembly 400. Wherein, the plug 200, the direct-acting overflow valve assembly 300 and the sealing ring assembly 400 are all integrated on the valve block 100. According to the scheme, the provided electromagnetic overflow valve control cover plate 600 is matched with the two-way cartridge valve 500 and the electromagnetic directional valve 700 for use, so that the limitation of low flow of a common electromagnetic overflow valve can be solved, and squealing can be effectively prevented.

Referring to fig. 2-3, specifically, the valve block 100 is an integrated body, the surface of which is provided with a plurality of mounting holes, and the interior of which can be provided with a plurality of flow passages and oil passages as required.

The construction of the valve block 100 is well known to those skilled in the art and will not be described herein.

In the scheme, a first flow passage 101, a first damping hole 102, a central flow passage 103, a second stepped hole 104, a second flow passage 105, a second damping hole 106, a threaded insertion hole 107, a third flow passage 108, a first pilot oil passage 109, a second pilot oil passage 110 and a pilot oil passage 111 are arranged in a valve block; a process slant hole 112, a process straight hole 113 and a third orifice 114.

Wherein, a plug screw 200 is arranged on one side of the central flow passage 103, and the other side is connected with the direct overflow valve assembly 300 through a threaded plug hole 107.

The first flow channel 101 is an inclined hole, the bottom of which is provided with a first damping hole 102 and is communicated with a central flow channel 103; the central flow passage 103 is communicated with the thread insertion hole 107; the threaded insert 107 communicates with the third flow passage 108.

The bottom of the second stepped hole 104 is provided with a second flow passage 105; the second flow passage 105 is an inclined hole, and a second orifice 106 is formed at the bottom and communicates with the center flow passage 103.

The bottom of the first pilot oil passage 109 is a third orifice 114, and communicates with the center flow passage 103.

The second pilot oil path 110 is communicated with the process straight hole 113; the process straight hole 113 is communicated with the process inclined hole 112; the oblique process holes 112 are respectively communicated with the pilot oil outlet path 111 and the thread insertion holes 107.

The seal ring assembly comprises a fifth seal ring 401, a sixth seal ring 402 and a seventh seal ring 403; wherein, the fifth sealing ring 401 is arranged in a groove at the end part of the second flow passage 108; a sixth sealing ring 402 is arranged in a groove at the end part of the first flow passage 101; the seventh sealing ring 403 is mounted in a groove in the outer circle of the boss of the valve block.

The direct-acting relief valve assembly 300 comprises a first sealing ring 301, a valve seat 302, a valve sleeve 303, a second sealing ring 304, a guide valve core 305, a third sealing ring 306, a spring 307, a fourth sealing ring 308, a steel wire retainer ring 309, an adjusting rod 311 and a valve seat hole 312.

Further, the first sealing ring 301 and the second sealing ring 304 are used for ensuring the sealing performance in the valve plate; wherein the first sealing ring 301 is matched and arranged in a groove on the side end surface of the valve seat 302; a second seal ring 304 fits within an outer circumferential groove of the valve seat 302.

The excircle of the valve seat 302 is matched and connected with the inner hole of the valve sleeve 303; the spring 307 is sleeved on the guide valve core 305 and is arranged in an inner hole of the adjusting rod 311 together; the groove on the outer circle of the adjusting rod 311 is provided with a fourth sealing ring 308 which is arranged in the inner hole of the valve sleeve 303 to be matched and connected with the outer circle of the valve seat 302.

A steel wire retaining ring 309 is additionally arranged in a groove of an inner hole of the valve sleeve 303 and used for preventing the adjusting rod 311 from falling off; the end of the pilot poppet 305 bears spherically against the seat bore 312; a third sealing ring 306 is fitted in a groove in the outer circumference of the valve housing 303 and fitted together into the screw insertion hole 107.

The two-way cartridge valve 500 and the solenoid directional valve 700 are well known to those skilled in the art and will not be described herein.

The working process of the method in specific application is illustrated as follows:

when the electromagnetic overflow valve control cover plate formed by the scheme is applied specifically, referring to fig. 4, the electromagnetic overflow valve control cover plate is divided into a pressure relief state and a pressure build-up state by way of example:

(1) pressure relief state:

the electromagnetic directional valve 700 is not powered, hydraulic oil enters from the first oil port 510 of the two-way cartridge valve 500, and simultaneously branches to the first oil port 610 of the electromagnetic spill valve control cover plate 600, passes through the first flow passage 101, the first damping hole 102, the central flow passage 103, the third damping hole 114, the first pilot oil passage 109, and reaches the third oil port 730 of the electromagnetic directional valve, namely, the first oil port 610 of the electromagnetic spill valve control cover plate 600 → passes through the first flow passage 101 → the first damping hole 102 → the central flow passage 103 → the third damping hole 114 → the first pilot oil passage 109 → the third oil port 730 of the electromagnetic directional valve. In the electromagnetic directional valve 700, the third port 730 → the second port 720, the second port 720 reaches the second pilot oil passage 110 of the electromagnetic spill valve control cover plate 600, and then reaches the oil tank through the process straight hole 113 → the process inclined hole 112 → the threaded plug hole 107 → the third flow passage 108, at this time, the pilot control oil pressure is zero.

At this time, in the electromagnetic spill valve control cover plate 600, the pilot control oil simultaneously passes through the center flow passage 103 → the second orifice 106 → the second flow passage 105 → the second stepped hole 104 → the spring chamber of the two-way cartridge valve, because the spring chamber has no pressure, the pressure acting on the spool of the two-way cartridge valve 500 pushes the spool open against the spring force to open, the hydraulic oil returns to the oil tank from the first port 510 → the second port 520 of the two-way cartridge valve 500 without pressure, and the pressure of the first port is extremely low and only overcomes the pressure of the spring force, thus the pressure relief state is presented.

(2) And (3) a voltage build-up state:

the electromagnetic directional valve 700 is powered on, hydraulic oil enters from the first oil port 510 of the two-way cartridge valve 500, and simultaneously branches to the first oil port 610 of the electromagnetic spill valve control cover plate 600, passes through the first flow passage 101, the first damping hole 102, the central flow passage 103, the third damping hole 114, the first pilot oil passage 109, and reaches the third oil port 730 of the electromagnetic directional valve 700, namely, the first oil port 610 of the electromagnetic spill valve control cover plate 600 → the first flow passage 101 → the first damping hole 102 → the central flow passage 103 → the third damping hole 114 → the first pilot oil passage 109 → the third oil port 730 of the electromagnetic directional valve 700. Inside the solenoid valve, the third port 730 → the first port 710, the first port 710 is blocked and blocked, and the pilot hydraulic oil cannot directly return to the tank.

At this time, the pilot control oil simultaneously passes through the center flow passage 103 → the second orifice 106 → the second flow passage 105 → the second stepped bore 104 → the spring chamber of the two-way cartridge 500 inside the electromagnetic spill valve control cover 600.

And then, dividing one path to a direct-acting overflow valve: the pilot hydraulic oil acts on the pilot valve element 305 through the valve seat hole 312, the pilot control oil pressure acts on the thrust generated on the oil sealing area to overcome the compression force of the spring to push the pilot valve element, and the pressure of the spring can be adjusted by the adjusting rod 311, so that the pressure of the pilot oil can be adjusted.

When the pilot oil pressure equals the spring compression force, the pilot oil pushes against the pilot poppet 305 and the exiting pilot oil returns to the tank through the threaded cartridge 107, the third flow passage 108, while the pressure in front of the pilot poppet remains constant, which acts on the spring cavity of the two-way cartridge 500.

At this time, since the pilot control oil passing through the pilot spool flows, a pressure difference is generated between both ends of the first orifice 102, that is, a pressure difference is formed between both ends of the pilot spool 305 inside the two-way cartridge 500, that is, the first port of the two-way cartridge 500 and the spring chamber, and the pressure difference overcomes the spring compression force of the two-way cartridge 500, so that the spool of the two-way cartridge 500 is opened, and the excess hydraulic oil returns to the oil tank from the first port 510 → the second port 520, and the pressure of the first port 510 does not rise any more, thereby performing a function of relief.

According to the electromagnetic overflow valve control cover plate provided by the scheme, the plurality of damping holes are formed, so that the flow of pilot control oil can be limited, the impact of the valve during working is avoided, the buffering effect is achieved, and the phenomenon of squealing caused by the large pilot control oil flow when the large pilot control oil flow passes through the guide valve core is avoided; secondly, this device compact structure, small has the characteristics that the through flow is big.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A control cover plate of an electromagnetic overflow valve is characterized by comprising a valve block, a plug, a direct-acting overflow valve component and a sealing ring component; the plug is arranged on one side of the valve block; the direct-acting overflow valve assembly is arranged on the other side of the valve block; the sealing ring is arranged inside the valve block.

2. The control cover plate of the electromagnetic overflow valve according to claim 1, characterized in that a first flow passage, a first damping hole, a center flow passage, a second stepped hole, a second flow passage, a second damping hole, a threaded insertion hole, a third flow passage, a first pilot oil passage, a second pilot oil passage and a pilot oil outlet passage are arranged inside the valve block; the process inclined hole, the process straight hole and the third damping hole;

the second pilot oil way is communicated with the process straight hole;

3. The control cover plate of an electromagnetic spill valve according to claim 1, wherein the seal ring assembly includes a fifth seal ring, a sixth seal ring and a seventh seal ring; the fifth sealing ring is arranged in the third flow channel; the sixth sealing ring is arranged in the first flow passage; the seventh seal ring is mounted in the valve block.

4. The control cover plate of the electromagnetic overflow valve according to claim 1, wherein the direct overflow valve assembly comprises a first seal ring, a valve seat, a valve sleeve, a second seal ring, a guide valve core, a third seal ring, a spring, a fourth seal ring, a steel wire retainer ring, an adjusting rod and a valve seat hole;