CN219774902U

CN219774902U - Remote-control pilot overflow valve

Info

Publication number: CN219774902U
Application number: CN202320585089.7U
Authority: CN
Inventors: 陈忠年; 张海东; 吴静仁
Original assignee: Zenith Steel Group Co Ltd; Changzhou Zenith Special Steel Co Ltd
Current assignee: Zenith Steel Group Co Ltd; Changzhou Zenith Special Steel Co Ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-09-29
Anticipated expiration: 2033-03-22

Abstract

The utility model relates to the technical field of overflow valves, in particular to a remotely regulated pilot overflow valve, which comprises a main valve body and a main valve core arranged in a main runner on the main valve body, wherein a main spring is arranged between the main valve core and the main valve body, the pilot overflow valve further comprises an overflow valve, the main valve core divides the main runner into a first cavity and a second cavity which are mutually separated, an oil inlet, a first control oil port and an oil outlet are arranged on the main valve body, the oil inlet is communicated with the first cavity, the first control oil port is communicated with the second cavity, and when the pilot overflow valve is used, the differential pressure of the first cavity and the second cavity is controlled by the overflow valve, the displacement of the valve core is controlled, the opening degree of the oil outlet is controlled, and the automatic control of the valve core is realized, so that the manual operation is not needed, the valve body is not needed to be manually regulated, the regulation of the output pressure of the valve body is changed, the equipment meets the occasions with different pressures, the manual regulation operation is easy to make mistakes, the regulation of the required pressure is not enough, and the automation is not needed.

Description

Remote-control pilot overflow valve

Technical Field

The utility model relates to the technical field of overflow valves, in particular to a remotely-controlled pilot overflow valve.

Background

The press is applied to various occasions, for example, when the die casting technology is adopted, the press is matched with the valve body to act through the hydraulic station, the valve body is manually adjusted in the prior art according to different pressures required by different occasions, so that the output pressure of the valve body is changed, the equipment meets the occasions with different pressures, manual adjustment operation is easy to make mistakes, the required pressure is not adjusted, and the automation is not enough.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to solve the problems that the valve body is easy to make mistakes, the required pressure is not regulated and the automation is insufficient in the prior art, the pilot type overflow valve with remote regulation and control is provided.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a remote regulation and control's guide formula overflow valve, includes main valve body and the main valve core of setting in the main runner on the main valve body, be provided with the main spring between main valve core and the main valve body, still include the overflow valve, main valve core separates into first cavity and the second cavity that separates each other with the main runner, be provided with oil inlet, first control hydraulic fluid port and oil-out on the main valve body, oil inlet and first cavity intercommunication, first control hydraulic fluid port and second cavity intercommunication, be provided with the first through-hole with first cavity and second cavity intercommunication on the main valve core, first cavity and oil-out intercommunication, first control hydraulic fluid port and overflow valve intercommunication when at initial state, the effort through the main spring makes the sealed face of main valve core and valve body contact, realizes that the oil-out closes. Compared with the prior art, the overflow valve communicated with the second cavity is arranged on the main valve body, when the pressure in the second cavity is larger than that of the overflow valve, the overflow valve is opened and overflows, the pressure in the first cavity is larger than that in the second cavity, the main valve core overcomes the acting force of the main spring and displaces, the opening of the oil outlet is larger, namely, the overflow valve is used for controlling the overflow pressure, and the opening of the oil outlet is controlled.

In order to meet different use occasions, preferably, in some embodiments, the first control oil port is connected in parallel with a plurality of relief valves, the control pressures of the relief valves are different, and each relief valve is correspondingly connected in series with a first reversing valve. The plurality of overflow valves are arranged in parallel, the overflow pressures of the plurality of overflow valves are different, and one of the overflow valves is selected through the first reversing valve, so that the requirement is met.

Preferably, in some embodiments, a pilot valve for controlling the opening degree of the oil outlet is arranged on the main valve body.

Preferably, in some embodiments, a main valve hole is formed in the main valve core, one end of the main valve hole is communicated with the oil outlet, the pilot valve comprises a pilot valve body, a pilot valve core and a pressure regulating spring, the pilot valve body is arranged on the main valve body, a pilot runner is arranged in the pilot valve body, the second cavity is communicated with the other end of the main valve hole through the pilot runner, the pilot valve core is arranged in the pilot runner, and the pressure regulating spring is arranged between the pilot valve core and the pilot valve body and used for controlling the pilot valve core to open or close the pilot runner.

In some preferred embodiments, a second reversing valve communicated with the pilot runner is arranged on the pilot valve body, and an input oil port of the reversing valve is communicated with an external oil path.

Preferably, in some embodiments, an adjusting mechanism for adjusting the acting force of the pressure adjusting spring on the pilot valve core is arranged on the pilot valve body.

Preferably, in some embodiments, the adjusting mechanism comprises an adjusting rod, one end of the adjusting rod is connected to the pilot valve body in a threaded mode, one end of the adjusting rod is propped against a pressure adjusting spring, and the pressure adjusting spring is located between the pilot valve core and the adjusting rod.

Preferably, in some embodiments, the adjusting lever is provided with an adjusting handle.

The beneficial effects of the utility model are as follows: when the remotely regulated pilot overflow valve is used, the differential pressure of the first cavity and the second cavity is controlled through the overflow valve, the displacement of the valve core is controlled, the opening degree of the oil outlet is controlled, the valve core is automatically controlled without manual operation, the existing regulation of the valve body through manual operation is avoided, the regulation of changing the output pressure of the valve body is achieved, the equipment meets the occasions with different pressures, the manual regulation operation is easy to make mistakes, the required pressure is not regulated, and the automation is not enough.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic structural view of the present utility model.

In the figure: 1. the main valve body, 2, the main valve core, 3, the overflow valve, 4, the first cavity, 5, the second cavity, 6, the oil inlet, 7, the first control oil port, 8, the oil outlet, 9, the first reversing valve, 10, the pilot valve, 11, the main valve hole, 12, the pilot valve body, 13, the pilot valve core, 14, the pressure regulating spring, 15, the pilot runner, 16, the second reversing valve, 17, the regulation pole, 18, the regulating handle, 19, the main spring, 20 and the first through hole.

Detailed Description

The utility model is further described in detail below in connection with the examples:

the present utility model is not limited to the following embodiments, and those skilled in the art can implement the present utility model in various other embodiments according to the present utility model, or simply change or modify the design structure and thought of the present utility model, which fall within the protection scope of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in 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 the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1, a pilot-operated overflow valve with remote regulation and control comprises a main valve body 1, a main valve core 2 and an overflow valve 3, wherein an oil inlet 6, a first control oil port 7 and an oil outlet 8 are arranged on the main valve body 1, the main valve core 2 is arranged in a main flow channel of the main valve body 1, the main valve core 2 divides the main flow channel into a first cavity 4 and a second cavity 5 which are mutually separated, the oil inlet 6 is communicated with the first cavity 4, the first control oil port 7 is communicated with the second cavity 5, the first cavity 4 is communicated with the oil outlet 8, a main spring 19 is arranged between the main valve core 2 and the main valve body 1, a first through hole 20 is arranged on the main valve core 2, the first through hole 20 is communicated with the first cavity 4 and the second cavity 5, the first control oil port 7 is communicated with the overflow valve 3, and when in an initial state, the acting force of the main valve core 2 is used for enabling a sealing surface of the main valve core 2 to be contacted with the valve body to realize the closing of the oil outlet 8.

In order to enable the reversing valve to be suitable for different occasions, three overflow valves 3 are connected in parallel on the first control oil port 7, the pressure of the three overflow valves 3 is 80KG, 100KG and 120KG respectively, a first reversing valve 9 is correspondingly connected in series on each overflow valve 3, the first reversing valve 9 is a two-position two-way electromagnetic reversing valve, an oil inlet 6 of the two-position two-way battery reversing valve is communicated with the first control oil port 7, an oil outlet 8 of the two-position two-way battery reversing valve is communicated with an oil port of the overflow valve 3, and an oil outlet 8 of the overflow valve 3 is communicated with an external oil tank.

The main valve core 2 is provided with a main valve hole 11, one end of the main valve hole 11 is communicated with the oil outlet 8, a pilot valve 10 for controlling the opening of the oil outlet 8 is fixedly arranged on the main valve body 1, the pilot valve 10 comprises a pilot valve body 12, a pilot valve core 13 and a pressure regulating spring 14, the pilot valve body 12 is arranged on the main valve body 1, a pilot runner 15 is arranged in the pilot valve body 12, the pilot runner 15 is communicated with the second cavity 5 and the other end of the main valve hole 11, the pilot valve core 13 is arranged in the pilot runner 15, and the pressure regulating spring 14 is arranged between the pilot valve core 13 and the pilot valve body 12 and is used for controlling the pilot valve core 13 to open or close the pilot runner 15.

In order to facilitate remote control, the pilot valve body 12 is provided with a second reversing valve 16 communicated with the pilot runner 15, and an input oil port of the reversing valve is communicated with an external oil path.

In order to prevent remote control from failing, an adjusting mechanism for adjusting the acting force of the pressure adjusting spring 14 on the pilot valve core 13 is arranged on the pilot valve body 12, the adjusting mechanism comprises an adjusting rod 17, one end of the adjusting rod 17 is connected to the pilot valve body 12 in a threaded mode, one end of the adjusting rod 17 is abutted to the pressure adjusting spring 14, the pressure adjusting spring 14 is located between the pilot valve core 13 and the adjusting rod 17, and an adjusting handle 18 is arranged on the adjusting rod 17. The adjusting lever 17 is controlled to rotate and turn by an adjusting lever 17 through an adjusting handle 18 by an adjusting lever 17 which is connected with the pilot valve body 12 in a threaded manner

When the pilot overflow valve with remote regulation and control is used, oil enters from the oil inlet 6P on the main valve body 1 and fills the first cavity 4 on the main valve body 1, oil in the first cavity 4 acts on the lower end face of the main valve core 2, meanwhile, oil enters and fills the second cavity 5 of the main valve body 1 through the first through hole 20, then enters and fills the right cavity of the pilot valve core 13 through the small hole on the inner cone valve seat of the pilot valve 10, and meanwhile, oil acts on the upper end of the main valve core 2 and the right cavity conical surface of the pilot valve core 13.

When the oil pressure of the oil inlet 6 is lower and is smaller than the acting force of the pressure regulating spring 14 in the left cavity of the pilot valve core 13, the pilot valve 10 is in a closed state, no passage is formed for oil flowing through the first through hole 20, and a sealing cavity is formed by the first cavity 4, the second cavity 5 and the right cavity of the pilot valve core 13 of the main valve body 1, so that the pressures of all points in the sealing cavity are equal and are equal to the oil pressure of the oil inlet 6 of the main valve body 1, and meanwhile, the oil inlet 6 and the main valve hole 11 are not communicated.

When the pressure of the oil inlet 6 is gradually increased, the pressures of the first cavity 4, the second cavity 5 and the right cavity of the pilot valve core 13 of the main valve core 2 are also gradually increased, when the pressure exceeds the acting force of the pressure regulating spring 14 at the pilot valve core 13, the pilot valve core 13 moves leftwards, the pilot flow passage 15 of the pilot valve body 12 is opened, the oil enters the main valve hole 11 on the main valve core 2 through the pilot flow passage 15 of the pilot valve body 12 and flows back to the oil tank through the oil outlet 8, at the moment, the pressure of the second cavity 5 of the main valve body 1 is lower than the pressure of the first cavity 4, and the main valve core 2 moves upwards to enlarge the opening of the oil outlet 8.

According to the on-site working condition, the second control oil port of the pilot valve body 12 can be connected with a control pipeline, such as a second reversing valve 16 and is opened, external control oil enters the pilot valve core 13 through the second reversing valve 16, the pilot valve core 13 is pushed to be opened, the second cavity 5 is communicated with the main valve hole 11 through the pilot flow passage 15, at the moment, the pressure of the second cavity 5 of the main valve body 1 is lower than that of the first cavity 4, the main valve core 2 moves upwards, the opening of the oil outlet 8 is increased, and remote regulation and control are realized.

The overflow pressures of the three overflow valves 3 connected in parallel with the first control oil port 7 are 80KG, 100KG and 120KG overflow respectively, according to the on-site working condition, three pressures can be set for on-site use remotely, the first reversing valve 9 at one of the overflow valves 3 is opened, at the moment, the overflow pressure of the overflow valve 3 is set to be 100KG overflow, when the upper cavity of the main valve core 2 exceeds 100KG, the overflow valve 3 is opened for pressure relief, the pressure of the second cavity 5 of the main valve core 2 is lower than the pressure of the first cavity 4, the main valve core 2 is opened for overflow, and the other 2 pressure methods are the same.

The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit 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

1. The utility model provides a remote regulation and control's guide formula overflow valve, includes main valve body (1) and sets up main valve core (2) in the sprue on main valve body (1), be provided with main spring (19), its characterized in that between main valve core (2) and main valve body (1): still include overflow valve (3), main valve core (2) separate into first cavity (4) and second cavity (5) that separate each other with the sprue, be provided with oil inlet (6), first control hydraulic fluid port (7) and oil-out (8) on main valve body (1), oil inlet (6) and first cavity (4) intercommunication, first control hydraulic fluid port (7) and second cavity (5) intercommunication, be provided with first through-hole (20) with first cavity (4) and second cavity (5) intercommunication on main valve core (2), first cavity (4) and oil-out (8) intercommunication, first control hydraulic fluid port (7) and overflow valve (3) intercommunication, when in initial state, the effort through main spring (19) makes sealed face and the valve body contact of main valve core (2), realizes that oil-out (8) are closed.

2. The remotely controlled pilot operated relief valve of claim 1, wherein: the first control oil port (7) is connected with a plurality of overflow valves (3) in parallel, the control pressures of the overflow valves (3) are different, and each overflow valve (3) is correspondingly connected with a first reversing valve (9) in series.

3. A remotely controlled pilot operated relief valve according to claim 1 or 2, wherein: the main valve body (1) is provided with a pilot valve (10) for controlling the opening degree of the oil outlet (8).

4. A remotely controlled pilot operated relief valve as defined in claim 3, wherein: be provided with main valve hole (11) on main valve core (2), the one end and the oil-out (8) intercommunication of main valve hole (11), pilot valve (10) include pilot valve body (12), pilot valve case (13) and pressure regulating spring (14), pilot valve body (12) set up on main valve body (1), be provided with pilot runner (15) in pilot valve body (12), pilot runner (15) are with the other end intercommunication of second cavity (5) and main valve hole (11), pilot valve case (13) set up in preceding pilot runner (15), pressure regulating spring (14) set up between pilot valve case (13) and pilot valve body (12) and are used for controlling pilot valve case (13) to open or close pilot runner (15).

5. The remotely controlled pilot operated relief valve of claim 4, wherein: the pilot valve body (12) is provided with a second reversing valve (16) communicated with the pilot flow passage (15), and an input oil port of the reversing valve is communicated with an external oil path.

6. The remotely controlled pilot operated relief valve of claim 5, wherein: the pilot valve body (12) is provided with an adjusting mechanism for adjusting the acting force of the pressure adjusting spring (14) on the pilot valve core (13).

7. The remotely controlled pilot operated relief valve of claim 6, wherein: the adjusting mechanism comprises an adjusting rod (17), one end of the adjusting rod (17) is connected to the pilot valve body (12) in a threaded mode, one end of the adjusting rod (17) is propped against the pressure adjusting spring (14), and the pressure adjusting spring (14) is located between the pilot valve core (13) and the adjusting rod (17).

8. The remotely controlled pilot operated relief valve of claim 7, wherein: an adjusting handle (18) is arranged on the adjusting rod (17).